CN110905857A - Cooling and heat dissipating device for centrifugal pump - Google Patents

Abstract

The invention discloses a cooling heat dissipation device for a centrifugal pump, which comprises a cooling water inlet flange, a cooling water outlet flange, an inlet pipeline first electromagnetic valve, an inlet pipeline second electromagnetic valve, an outlet pipeline first electromagnetic valve, an outlet pipeline second electromagnetic valve, a first filter screen butt-clamping flange, a second filter screen butt-clamping flange, a pressure regulating valve, a heat exchange box, a temperature sensor, a valve controller, a cooling water connecting pipeline and an optional heat exchange box connecting auxiliary. This device can provide good heat dispersion for the centrifugal pump, and outside additional installation, the structure of pump inside need not be revised, and the capillary is let to make the installation more convenient with the use of cutting ferrule formula joint, and valve controller cooperation air-vent valve and temperature sensor adjust cooling water flow accurately, reduce the cooling water consumption to realize the constant temperature of the pump body under the lower temperature, the pipeline switching-over design makes impurity periodic by the cooling water backwash, does not need the manual maintenance.

Description

Cooling and heat dissipating device for centrifugal pump

Technical Field

The invention relates to the field of cooling heat dissipation devices, in particular to a cooling heat dissipation device for a centrifugal pump.

Background

The centrifugal pump is a fluid conveying machine, and is mainly used for conveying liquid including water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal and the like. The centrifugal pump is widely used in urban water supply, sewage systems, power generation and utilization systems, chemical systems, mine metallurgy, ships, aerospace and other occasions.

When the centrifugal pump operates, the temperature of the pump body can be increased due to factors such as acting on a medium, friction between the medium and pump parts, heating during the operation of a bearing, heating of lubricating oil and the like, and for a pump (such as a hot water pump, a boiler pump, a high-temperature chemical pump and the like) for conveying a heat medium, the pump is rapidly heated, if the heat of the pump body cannot be taken away in time, the high temperature of the pump can influence the normal work of the bearing, influence the gaps among the parts inside the pump, lead to the deterioration of the lubricating oil, cause the damage of parts which cannot resist high temperature and the like, the pump is shut down if light, the whole pump is damaged if heavy, and the. The heat dissipation of the centrifugal pump is very important for the centrifugal pump.

The centrifugal pump can be divided into a submersible pump and a dry pump according to the installation environment, the submersible pump is immersed in water to operate, the heat dissipation of the whole pump depends on the water of the surrounding environment, the heat dissipation is good, but for the dry pump, the heat which can be taken away by the surrounding air can not meet the heat dissipation requirement of the centrifugal pump, so that the problem which needs to be solved urgently at present is to design a heat dissipation structure or a heat dissipation device with good effect to provide good heat dissipation performance.

Disclosure of Invention

The invention aims to provide a cooling and heat dissipating device for a centrifugal pump, which solves the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a cooling and heat dissipating device for a centrifugal pump is arranged at a part of the centrifugal pump with heat dissipation requirements. The cooling heat dissipation device comprises a cooling water inlet flange, a cooling water outlet flange, a first inlet pipeline electromagnetic valve, a second inlet pipeline electromagnetic valve, a first outlet pipeline electromagnetic valve, a second outlet pipeline electromagnetic valve, a first filter screen oppositely-clamping flange, a second filter screen oppositely-clamping flange, a pressure regulating valve, a heat exchange box, a temperature sensor, a valve controller and a cooling water connecting pipeline. The outer surface of the heat exchange box is attached to the part of the pump needing cooling and is fixed on the pump through a fastener.

Furthermore, a probe of the temperature sensor is arranged on the pump at a position close to the heat exchange box, and the temperature sensor and the heat exchange box are connected with the same part on the pump. The temperature sensor is used for detecting the temperature of the installation part of the temperature sensor, the probe of the temperature sensor is arranged at the position, close to the heat exchange box, of the pump, and the temperature sensor and the same part, connected with the pump, of the heat exchange box can enable the sensor to accurately measure the temperature of the position of the heat exchange box, so that the subsequent operation can be facilitated.

Furthermore, the cooling water inlet flange, the cooling water outlet flange, the first electromagnetic valve of the inlet pipeline, the second electromagnetic valve of the inlet pipeline, the first electromagnetic valve of the outlet pipeline, the second electromagnetic valve of the outlet pipeline, the first filter screen oppositely-clamping flange, the second filter screen oppositely-clamping flange, the pressure regulating valve and the heat exchange box are connected together through a cooling water connecting pipeline. The cooling water connecting pipeline comprises four tee joints: a first tee, a second tee, a third tee and a fourth tee. The first tee joint and the third tee joint are connected through a pipeline, an inlet pipeline second electromagnetic valve is arranged between the first tee joint and the third tee joint, the first tee joint and the fourth tee joint are connected through a pipeline, an inlet pipeline first electromagnetic valve is arranged between the first tee joint and the fourth tee joint, the second tee joint and the third tee joint are connected through a pipeline, an outlet pipeline first electromagnetic valve is arranged between the second tee joint and the third tee joint, the second tee joint and the fourth tee joint are connected through a pipeline, an outlet pipeline second electromagnetic valve is arranged between the second tee joint and the fourth tee joint, the third tee joint and the fourth tee joint are connected through a pipeline, a first filter screen opposite clamping flange, a first filter screen and a pressure regulating valve are sequentially arranged between the third tee joint and the fourth tee joint, the heat exchange box, the second filter screen are clamped by the flanges, the first filter screen is clamped by the flanges and is arranged on the cooling water pipeline, and the second filter screen is clamped by the flanges and is arranged on the cooling water connecting pipeline. The remaining one end of first tee bend is connected the cooling water inlet flange, and the remaining one end of second tee bend is connected cold water intaking outlet flange. The heat exchange box is in contact with the pump body, heat of the pump body is conducted to the heat exchange box, cooling water enters the device from the cooling water inlet flange, flows through the heat exchange box through the cooling water connecting pipeline, takes away heat of the heat exchange box, and is discharged from the cooling water outlet flange. First filter screen and second filter screen can filter the impurity in the cooling water, let impurity can not flow to air-vent valve and heat transfer box, if impurity flows to air-vent valve and heat transfer box, can influence the use of air-vent valve and heat transfer box under the long-term accumulated condition.

Furthermore, a valve controller is arranged beside the pump and is connected with the first electromagnetic valve of the inlet pipeline, the second electromagnetic valve of the inlet pipeline, the first electromagnetic valve of the outlet pipeline, the second electromagnetic valve of the outlet pipeline, the pressure regulating valve and the temperature sensor through communication control cables.

The valve controller is internally provided with two control circuits: an electromagnetic valve on-off control circuit and a negative feedback regulating circuit.

The solenoid valve on-off control circuit controls the on-off of the first solenoid valve of the inlet pipeline, the second solenoid valve of the inlet pipeline, the first solenoid valve of the outlet pipeline and the second solenoid valve of the outlet pipeline: a. the first electromagnetic valve of the inlet pipeline and the first electromagnetic valve of the outlet pipeline are opened, and the second electromagnetic valve of the inlet pipeline and the second electromagnetic valve of the outlet pipeline are closed; b. the first electromagnetic valve of the inlet pipeline and the first electromagnetic valve of the outlet pipeline are closed, and the second electromagnetic valve of the inlet pipeline and the second electromagnetic valve of the outlet pipeline are opened. The 'cooling water reversing' of a pipeline from the cooling water inlet and outlet flange to the first filter screen and the second filter screen can be realized by periodically changing the switching state of the electromagnetic valve. In the closed period of the inlet pipeline second electromagnetic valve and the outlet pipeline second electromagnetic valve, cooling water flows to the heat exchange box from the second filter screen, flows out from the first filter screen after heat exchange, and impurities in the cooling water are filtered at the second filter screen; in next cycle, the solenoid valve on-off state is changed, and cooling water flows to the heat transfer box from first filter screen, flows out from the second filter screen after the heat transfer, and the impurity of second filter screen department will be washed away to the water that flows out, and the impurity in this cycle cooling water is filtered in first filter screen department, and these impurities will be washed away by palirrhea cooling water once more in next cycle.

The negative feedback regulating circuit receives a signal from the temperature sensor and controls the opening of the pressure regulating valve. The temperature sensor converts the measured temperature parameters into different electric signals to be transmitted, and is divided into a thermal resistor, a thermocouple, a radiation thermometer and the like according to the principle, the output parameters and the like. Taking a common positive temperature coefficient thermal resistor (the resistance value of the resistor increases along with the rise of the temperature) as an example, the resistance value corresponding to the expected regulated temperature is set as a reference parameter of a negative feedback regulating circuit, the actually measured temperature is converted into an actual resistance value through the thermal resistor and is input into the negative feedback regulating circuit, the negative feedback regulating circuit compares the actual value with the reference value, if the actual value is smaller than the reference value (the actual temperature of the pump body is smaller than the expected temperature), the negative feedback regulating circuit gives a deviation signal, the opening of the pressure regulating valve is reduced, the flow of cooling water passing through the pressure regulating valve is reduced after the opening of the pressure regulating valve is reduced, the cooling water takes less heat, and the temperature of the pump body is increased. If the actual value is larger than the reference value (the actual temperature of the pump body is larger than the expected temperature), the negative feedback regulating circuit gives a deviation signal to increase the opening degree of the pressure regulating valve, the flow of the cooling water passing through the pressure regulating valve is increased after the opening degree of the pressure regulating valve is increased, the cooling water takes away more heat, and the temperature of the pump body is reduced. The negative feedback regulating circuit is matched with the pressure regulating valve and the temperature sensor to continuously eliminate the temperature fluctuation of the pump body, so that the consumption of cooling water is reduced, the pump temperature is stabilized at an expected temperature, and the expected temperature is lower than the temperature of the pump body when the pump does not use a cooling heat dissipation device. The negative feedback regulating circuit is particularly suitable for pumps with constant temperature requirements (such as chemical process pumps for conveying easily crystallized media) and pumps without constant temperature requirements, and when the expected pump temperature is as low as possible, the negative feedback regulating circuit can cancel the connection between the pressure regulating valve and the valve controller and manually regulate the opening of the pressure regulating valve to the maximum.

The valve controller may be implemented by an industrial personal computer (i.e., an industrial control computer, which is a general name of a tool for detecting and controlling a production process, electromechanical devices, and process equipment using a bus structure) or a PLC (i.e., a programmable logic controller) in which instructions for performing operations such as logic operation, sequence control, timing, counting, and arithmetic operation are stored, and various types of mechanical devices or production processes are controlled by digital or analog inputs and outputs.

Furthermore, the heat exchange box is of a box-shaped structure, two connectors are arranged on the side face of the heat exchange box and connected with a cooling water connecting pipeline, a wavy metal plate is welded inside the heat exchange box to form a serpentine channel, and two ends of the serpentine channel are connected with the two connectors on the side face of the heat exchange box. The heat exchange box is the heat exchange core of the invention, and the serpentine channel and the wavy metal plate in the heat exchange box can obtain larger heat exchange area, so that the heat exchange efficiency is improved.

Further, cooling heat abstractor still includes heat transfer box connection auxiliary, the pump can lug connection with the heat transfer box, also can be connected through heat transfer box connection auxiliary, heat transfer box connection auxiliary includes a plurality of connecting seats, connecting leg and dull and stereotyped, the connecting seat passes through the fastener with the pump and is connected, a plurality of connecting seats pass through connecting leg and connect on a flat board, the welding between connecting seat and the connecting leg, weld between connecting leg and the flat board, the flat board is connected through the fastener withheat transfer box 1, the heat transfer box, the auxiliary is connected to the heat transfer box, fastener between heat transfer box and the pump or the fastener material between connecting seat and the pump are copper. In order to sufficiently and rapidly transmit heat of a heat dissipation part on the pump body to the heat exchange box, the heat exchange box needs to be in sufficient contact with the pump body. When the blank of the pump has a machining allowance, a plane is machined on the pump body and is fully attached to the bottom surface of the heat exchange box, and the cooling and heat-radiating device does not need the heat exchange box to be connected with an auxiliary part; and when the blank of pump did not have this a machining allowance, and the blank of pump is inconvenient to be done the modification in short-term, just at this moment need heat transfer box to connect the auxiliary and connect heat transfer box and pump, and a plurality of connecting seats that the auxiliary was connected to the heat transfer box are installed on the pump, and the connecting seat sets up more, and the heat that the auxiliary can be conducted is connected to the heat transfer box more faster. The heat conductivity coefficient of copper is 6~8 times of steel and iron, and heat transfer box, heat transfer box connection auxiliary and relevant fastener use copper material can be better with the heat guide on the pump body to the heat transfer box carry out the heat transfer.

Furthermore, the cooling water connecting pipeline uses a stainless steel seamless capillary tube, and the cooling water pipeline is connected with a cooling water inlet flange, a cooling water outlet flange, an inlet pipeline first electromagnetic valve, an inlet pipeline second electromagnetic valve, an outlet pipeline first electromagnetic valve, an outlet pipeline second electromagnetic valve, a first filter screen oppositely-clamping flange, a second filter screen oppositely-clamping flange, a pressure regulating valve and a heat exchange box by using a clamping sleeve type joint. The stainless steel seamless capillary tube is a commonly used connecting tube in industry, and a cooling water connecting pipeline is formed by matching with a ferrule type joint, so that the cooling heat dissipation device is more convenient and faster to manufacture, modify, install, debug, maintain and the like.

Furthermore, the cooling water inlet flange, the cooling water outlet flange, the first electromagnetic valve of the inlet pipeline, the second electromagnetic valve of the inlet pipeline, the first electromagnetic valve of the outlet pipeline, the second electromagnetic valve of the outlet pipeline, the first filter screen oppositely-clamping flange, the first filter screen, the second filter screen oppositely-clamping flange, the second filter screen and the pressure regulating valve flow passage component are made of stainless steel. The overflowing materials of the parts are made of stainless steel, so that the cooling water flow channel can be prevented from being corroded, and regular rust removal and other maintenance are not needed.

Furthermore, the mesh number of the first filter screen and the second filter screen is 20-200 meshes. The larger the mesh number of the filter screen is, the smaller the granularity of the filtered impurities is, the more the filtered impurities are, but the too large mesh number of the filter screen can also cause the overlarge flow resistance at the filter screen. The impurity granularity in the cooling water is less, and a filter screen with a larger mesh can be selected when the cooling water source water pressure is higher.

Compared with the prior art, the invention has the beneficial effects that: the invention can provide good cooling heat radiation performance for the centrifugal pump, the invention is a cooling heat radiation device which is added externally, the structure in the pump does not need to be modified, the use of the capillary tube and the ferrule type joint ensures that the manufacture and the installation are more convenient, the valve controller is matched with the pressure regulating valve and the temperature sensor to accurately adjust the flow rate of cooling water, the consumption of the cooling water is reduced, the constant temperature of the pump body at lower temperature is realized, impurities are periodically back-washed by the cooling water, and the manual maintenance is not needed.

Drawings

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is a schematic flow diagram of a cooling and heat dissipating apparatus for a centrifugal pump according to the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a perspective view of the reversing line of the present invention;

FIG. 4 is a perspective view of the heat exchange cassette of the present invention;

FIG. 5 is a flow chart of negative feedback regulation logic of the present invention, using thermal resistors as an example;

FIG. 6 is a schematic sectional view showing the connection of the heat exchange cassette connection auxiliary of the present invention;

FIG. 7 is a first schematic flow diagram of cooling water according to the present invention;

FIG. 8 is a schematic flow diagram of cooling water according to the present invention.

In the figure: 1-a cooling water inlet flange, 2-a cooling water outlet flange, 3-an outlet pipeline first electromagnetic valve, 4-an outlet pipeline second electromagnetic valve, 5-an inlet pipeline first electromagnetic valve, 6-an inlet pipeline second electromagnetic valve, 7-a first filter screen, 71-a first filter screen oppositely-clamping flange, 8-a second filter screen, 81-a second filter screen oppositely-clamping flange, 9-a pressure regulating valve, 10-a heat exchange box, 11-a temperature sensor, 12-a valve controller, 13-a heat exchange box connecting accessory, 131-a connecting seat, 132-a connecting leg, 133-a flat plate, 30-a cooling water connecting pipeline, 31-a first tee joint, 32-a second tee joint, 33-a third tee joint, 34-a fourth tee joint and 50-a pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The cooling heat sink of the centrifugal pump is installed at a portion of thecentrifugal pump 50 where heat dissipation is required. As shown in fig. 1 and 2, the cooling heat dissipation device of the centrifugal pump includes a coolingwater inlet flange 1, a coolingwater outlet flange 2, an inlet pipeline firstelectromagnetic valve 5, an inlet pipeline secondelectromagnetic valve 6, an outlet pipeline firstelectromagnetic valve 3, an outlet pipeline secondelectromagnetic valve 4, afirst filter screen 7, a first filter screen clamping flange 71, asecond filter screen 8, a second filter screen clamping flange 81, apressure regulating valve 9, aheat exchange box 10, atemperature sensor 11, avalve controller 12, and a coolingwater connection pipeline 30.

The cooling water inlet flange 1, the cooling water outlet flange 2, the first solenoid valve 5 of inlet pipeline, the second solenoid valve 6 of inlet pipeline, the first solenoid valve 3 of outlet pipeline, the second solenoid valve 4 of outlet pipeline, first filter screen 7, first filter screen butt clamp flange 71, the second filter screen 8, the second filter screen butt clamp flange 81, air-vent valve 9 and heat exchange box 10 are connected together by cooling water connecting line 30, as shown in fig. 1, 3, cooling water connecting line 30 includes four tee joints: the filter screen comprises a first tee joint 31, a second tee joint 32, a third tee joint 33 and a fourth tee joint 34, wherein the first tee joint 31 is connected with the third tee joint 33 through a pipeline, an inlet pipeline second electromagnetic valve 6 is arranged between the first tee joint 31 and the third tee joint 33, the first tee joint 31 is connected with the fourth tee joint 34 through a pipeline, an inlet pipeline first electromagnetic valve 5 is arranged between the first tee joint 31 and the fourth tee joint 34, the second tee joint 32 is connected with the third tee joint 33 through a pipeline, an outlet pipeline first electromagnetic valve 3 is arranged between the second tee joint 32 and the third tee joint 33, the second tee joint 32 is connected with the fourth tee joint 34 through a pipeline, an outlet pipeline second electromagnetic valve is arranged between the second tee joint 32 and the fourth tee joint 34, the third tee joint 33 is connected with the fourth tee joint 34 through a pipeline, and a first filter screen clamping flange 71, a first filter screen 7, a pressure regulating valve 9, a second filter screen are sequentially arranged between the third tee joint 33 and the, Heat exchange box 10, second filter screen butt clamp flange 81 and second filter screen 8, first filter screen 7 is pressed from both sides tight the installation on cooling water pipeline 30 by first filter screen butt clamp flange 71, second filter screen 8 is pressed from both sides tight the installation on cooling water connecting line 30 by second filter screen butt clamp flange 81, cooling water inlet flange 1 is connected to the remaining one end of first tee bend 31, cold water outlet flange 2 is connected to the remaining one end of second tee bend 32, the laminating of heat exchange box 10 surface needs refrigerated position and fixes on pump 50 through the fastener at pump 50. Theheat exchange box 10 is contacted with thepump 50, the heat of thepump 50 is conducted to theheat exchange box 10, cooling water enters the device from the coolingwater inlet flange 1, flows through theheat exchange box 10 through the coolingwater connecting pipeline 30, takes away the heat of theheat exchange box 10, and is discharged out of the device from the coolingwater outlet flange 2. Thefirst filter 7 and thesecond filter 8 can filter out impurities in the cooling water, so that the impurities cannot flow to thepressure regulating valve 9 and theheat exchange box 10.

The probe of thetemperature sensor 11 is disposed on thepump 50 at a position close to theheat exchange box 10, and thetemperature sensor 11 and theheat exchange box 10 are connected to the same part on thepump 50. Thetemperature sensor 11 is used for detecting the temperature of the installation part, the probe of thetemperature sensor 11 is arranged on thepump 50 near theheat exchange box 10, and thetemperature sensor 50 can accurately measure the temperature of the position of theheat exchange box 10 by connecting thetemperature sensor 11 and theheat exchange box 10 with the same part on thepump 50, so that the subsequent operation can be facilitated.

Thevalve controller 12 is disposed beside thepump 50, and thevalve controller 12 is connected to the inlet pipeline firstelectromagnetic valve 5, the inlet pipeline secondelectromagnetic valve 6, the outlet pipeline firstelectromagnetic valve 3, the outlet pipeline secondelectromagnetic valve 4, thepressure regulating valve 9 and thetemperature sensor 11 through communication control cables.

Thevalve controller 12 has two control circuits inside: an electromagnetic valve on-off control circuit and a negative feedback regulating circuit.

The solenoid valve on-off control circuit controls the on-off of thefirst solenoid valve 5 of the inlet pipeline, thesecond solenoid valve 6 of the inlet pipeline, thefirst solenoid valve 3 of the outlet pipeline and thesecond solenoid valve 4 of the outlet pipeline: a. the inlet pipeline firstelectromagnetic valve 5 and the outlet pipeline firstelectromagnetic valve 3 are opened, and the inlet pipeline secondelectromagnetic valve 6 and the outlet pipeline second electromagnetic valve are closed 4; b. the inlet pipelinefirst solenoid valve 5 and the outlet pipeline first solenoid valve are closed 3, and the inlet pipelinesecond solenoid valve 6 and the outlet pipelinesecond solenoid valve 4 are opened. The 'cooling water reversing' from the cooling water inlet and outlet flange to the pipeline between the two filter screens can be realized by periodically changing the switching state of the electromagnetic valve. As shown in fig. 7, in the period that the inlet pipeline firstelectromagnetic valve 5 and the outlet pipeline firstelectromagnetic valve 3 are opened and the inlet pipeline secondelectromagnetic valve 6 and the outlet pipeline secondelectromagnetic valve 4 are closed, the cooling water flows from thesecond filter screen 8 to theheat exchange box 10, flows out from thefirst filter screen 7 after heat exchange, and impurities in the cooling water are filtered at thesecond filter screen 8; in the next cycle, the on-off states of the electromagnetic valves are changed, as shown in fig. 8, the inlet pipeline first electromagnetic valve and the outlet pipeline firstelectromagnetic valve 3 are closed, the inlet pipeline secondelectromagnetic valve 6 and the outlet pipeline secondelectromagnetic valve 4 are opened, the cooling water flows to theheat exchange box 10 from thefirst filter screen 7, the cooling water flows out from thesecond filter screen 8 after heat exchange, the impurities at thesecond filter screen 8 are washed away by the flowing water, the impurities in the cooling water in the cycle are filtered at thefirst filter screen 7, and the impurities are washed away by the flowing back cooling water again in the next cycle.

The negative feedback regulator circuit receives a signal from thetemperature sensor 12 and controls the opening degree of thepressure regulator valve 9. Thetemperature sensor 12 converts the measured temperature parameters into different electric signals to be transmitted, and thetemperature sensor 12 is divided into a thermal resistor, a thermocouple, a radiation thermometer and the like according to the principle, the output parameters and the like. As shown in fig. 5, taking a common positive temperature coefficient thermal resistor (resistance value increases with temperature), as an example, a resistance value corresponding to a desired temperature is set as a reference parameter of the negative feedback regulating circuit, an actually measured temperature is converted into an actual resistance value through the thermal resistor and is input into the negative feedback regulating circuit, the negative feedback regulating circuit compares the thermal resistor resistance value with a thermal resistor resistance value set value, if the thermal resistor resistance value is smaller than the thermal resistor resistance value set value (i.e. the actual temperature of thepump 50 is smaller than the desired temperature), the negative feedback regulating circuit provides a deviation signal to reduce the opening of thepressure regulating valve 9, after the opening of thepressure regulating valve 9 is reduced, the flow rate of cooling water passing through the pressure regulating circuit is reduced, the cooling water carries away less heat, and the temperature of thepump 50 is increased. If the thermal resistance value is larger than the set value of the thermal resistance value (the actual temperature of thepump 50 is larger than the expected temperature), the negative feedback regulating circuit gives a deviation signal to increase the opening degree of thepressure regulating valve 9, the flow of the cooling water passing through thepressure regulating valve 9 is increased after the opening degree of the pressure regulating valve is increased, the cooling water takes away more heat, and the temperature of thepump 50 is reduced. The negative feedback regulating circuit in thevalve controller 12 continuously eliminates the temperature fluctuation of thepump 50 body in cooperation with thepressure regulating valve 9 and thetemperature sensor 11, reduces the consumption of cooling water, and stabilizes the temperature of thepump 50 at a desired temperature. The negative feedback regulating circuit in the valve controller is particularly suitable forpumps 50 with constant temperature requirements (such as chemical process pumps for conveying easily crystallized media) and pumps without constant temperature requirements, and when the pump temperature is expected to be as low as possible, the connection between thepressure regulating valve 9 and thevalve controller 12 can be cancelled, and the opening of thepressure regulating valve 9 can be manually regulated to the maximum.

Thevalve controller 12 may be implemented by an industrial personal computer (i.e., an industrial control computer, which is a generic name of a tool for detecting and controlling a production process, electromechanical devices, and process equipment using a bus structure) or a PLC (i.e., a programmable logic controller) in which instructions for performing operations such as logic operation, sequence control, timing, counting, and arithmetic operation are stored, and various types of mechanical devices or production processes are controlled by digital or analog inputs and outputs.

As shown in fig. 4, theheat exchange box 10 is a box-shaped structure, two connectors are disposed on the side surface of theheat exchange box 10, the two connectors are connected to the coolingwater connection pipeline 30, a wavy metal plate is welded inside theheat exchange box 10 to form a serpentine channel, and two ends of the serpentine channel are connected to the two connectors on the side surface of theheat exchange box 10. Theheat exchange box 10 is the heat exchange core of the invention, and the serpentine channel and the wavy metal plate inside the heat exchange box can obtain larger heat exchange area, so that the heat exchange efficiency is improved.

As shown in fig. 6, the cooling heat dissipation device for a centrifugal pump of the present invention further includes a heat exchangebox connection accessory 13, thepump 50 and theheat exchange box 10 may be directly connected, or may be connected through the heat exchangebox connection accessory 13, the heat exchangebox connection accessory 13 includes a plurality ofconnection seats 131,connection legs 132 andflat plates 133, the connection seats 131 and thepump 50 are connected through fasteners, the plurality ofconnection seats 131 are connected to oneflat plate 133 through theconnection legs 132, the connection seats 131 and theconnection legs 132 are welded, theconnection legs 132 and theflat plates 133 are welded, theflat plates 133 and theheat exchange box 10 are connected through fasteners, and theheat exchange box 10, the heat exchangebox connection accessory 13, the fasteners between theheat exchange box 10 and thepump 50 or the fasteners between the connection seats 131 and thepump 50 are made of copper. When there is no allowance on the blank of thepump 50 to process a plane for installing theheat exchange box 10, and the blank of thepump 50 is inconvenient to modify in a short period of time, it is necessary to connect theheat exchange box 10 and thepump 50 by the heat exchangebox connecting auxiliary 13, the plurality of connectingseats 131 of the heat exchangebox connecting auxiliary 13 are installed on thepump 50, and the more the connectingseats 131 are provided, the more the heat conducted by the heat exchangebox connecting auxiliary 13 is. The heat conductivity coefficient of copper is 6~8 times of steel, andheat transfer box 10, heat transferbox connection auxiliary 13 and relevant fastener use copper material can be better with the heat guide on thepump 50 body to heattransfer box 10 and carry out the heat transfer.

The coolingwater connecting pipeline 30 uses a stainless seamless capillary tube, and the coolingwater pipeline 30 is connected with a coolingwater inlet flange 1, a coolingwater outlet flange 2, an inlet pipeline firstelectromagnetic valve 5, an inlet pipeline secondelectromagnetic valve 6, an outlet pipeline firstelectromagnetic valve 3, an outlet pipeline secondelectromagnetic valve 4, a first filter screen oppositely-clamping flange 71, a second filter screen oppositely-clamping flange 81, apressure regulating valve 9 and aheat exchange box 10 by using a ferrule type joint. The coolingwater connecting pipeline 30 formed by the stainless steel seamless capillary tube and the ferrule type joint can make the manufacturing, modification, installation, debugging, maintenance and the like of the cooling and heat dissipating device more convenient and faster.

The coolingwater inlet flange 1, the coolingwater outlet flange 2, the first inlet pipelineelectromagnetic valve 5, the second inlet pipelineelectromagnetic valve 6, the first outlet pipelineelectromagnetic valve 3, the second outlet pipelineelectromagnetic valve 4, the first filter screen clamping flange 71, thefirst filter screen 7, the second filter screen clamping flange 81, thesecond filter screen 8 and thepressure regulating valve 9 are made of stainless steel. The overflowing materials of the parts are made of stainless steel, so that the cooling water flow channel can be prevented from being corroded, and regular rust removal and other maintenance are not needed.

The mesh number of thefirst filter screen 7 and thesecond filter screen 8 is 20-200 meshes. The impurity granularity in the cooling water is less, and a filter screen with a larger mesh can be selected when the cooling water source water pressure is higher.

When the device is used, the inlet pipeline first electromagnetic valve 5 and the outlet pipeline first electromagnetic valve 3 are opened, when the inlet pipeline second electromagnetic valve 6 and the outlet pipeline second electromagnetic valve 4 are closed, cooling water enters the device from the cooling water inlet flange 1, flows through the inlet pipeline first electromagnetic valve 5, the second filter screen 8, the heat exchange box 10, the pressure regulating valve 9, the first filter screen 7 and the outlet pipeline first electromagnetic valve 3 and then flows out of the device from the cooling water outlet flange 2, the cooling water carries out heat exchange operation in the heat exchange box 10, impurities of the cooling water are filtered and accumulated by the second filter screen 8, and the cooling water carries away the accumulated impurities when passing through the first filter screen 7; the first solenoid valve of inlet pipeline 5 and the first solenoid valve of outlet pipeline 3 are closed, when inlet pipeline second solenoid valve 6 and outlet pipeline second solenoid valve 4 are opened, cooling water is from cooling water inlet flange 1 entering device, the cooling water flows through inlet pipeline second solenoid valve 6, first filter screen 7, the air-vent valve 9, heat transfer box 10, second filter screen 8, follow cooling water outlet flange 2 outflow device behind the outlet pipeline second solenoid valve 4, the cooling water carries out the heat transfer operation in heat transfer box 10, the impurity of cooling water is filtered by first filter screen 7 and is piled up, the accumulational impurity of this department is taken away when the cooling water flows through second filter screen 8. When the temperature of thepump 50 is higher, the opening degree of thepressure regulating valve 9 is increased, the flow of cooling water is increased, and the temperature of thepump 50 is reduced; when the temperature of thepump 50 is low, the opening degree of thepressure regulating valve 9 is reduced, the flow rate of the cooling water is reduced, and the consumption of the cooling water is reduced.

The cooling heat dissipation device for the centrifugal pump can provide good cooling heat dissipation performance for the centrifugal pump, the device is an external accessory, the structure in thepump 50 does not need to be changed in design, meanwhile, the capillary tube and the ferrule type joint are used, the manufacturing and the installation are convenient and fast, thevalve controller 12 is matched with thepressure regulating valve 9 and thetemperature sensor 11 to accurately adjust the flow rate of cooling water, the consumption of the cooling water is reduced, the constant temperature of thepump 50 body at a lower temperature is realized, impurities are periodically washed back by the cooling water, and manual maintenance is not needed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (9)

1. A cooling heat abstractor for centrifugal pump which characterized in that: the cooling and heat dissipating device for the centrifugal pump is arranged at a position with heat dissipating requirements on the centrifugal pump (50), and comprises a heat exchange box (10), wherein the heat exchange box (10) is of a box-shaped structure, and the outer surface of the heat exchange box (10) is attached to the position, needing to be cooled, of the pump (50) and is fixed on the pump (50) through a fastening piece.

2. The cooling heat sink for a centrifugal pump according to claim 1, wherein: the side surface of the heat exchange box (10) is provided with two connectors which are connected with a cooling water connecting pipeline (30), a wavy metal plate is welded inside the heat exchange box (10) to form a serpentine channel, and the two ends of the serpentine channel are connected with the two connectors on the side surface of the heat exchange box (10).

3. The cooling heat sink for a centrifugal pump according to claim 1, wherein: the cooling and heat dissipation device further comprises a probe of a temperature sensor (11) which is arranged on the pump (50) and close to the heat exchange box (10), and the temperature sensor (11) and the heat exchange box (10) are connected with the same part on the pump (50).

4. A cooling heat sink for a centrifugal pump according to claim 2, wherein: the cooling and heat-dissipating device also comprises a heat exchange box connecting auxiliary (13), the pump (50) and the heat exchange box (10) can be directly connected, and also can be connected through the heat exchange box connecting auxiliary (13), the heat exchange box connecting auxiliary (13) comprises a plurality of connecting seats (131), connecting legs (132) and flat plates (133), the connecting seats (131) are connected with the pump (50) through fasteners, the connecting seats (131) are connected on a flat plate (133) through connecting legs (132), the connecting seat (131) is welded with the connecting leg (132), the connecting leg (132) is welded with the flat plate (133), the flat plate (133) is connected with the heat exchange box (10) through a fastening piece, and the heat exchange box (10) and the heat exchange box connecting auxiliary piece (13) and the fastening piece between the heat exchange box (10) and the pump (50) or the fastening piece between the connecting seat (131) and the pump (50) are made of copper.

5. The cooling heat sink for a centrifugal pump according to claim 1, wherein: the cooling heat dissipation device further comprises a cooling water inlet flange (1), a cooling water outlet flange (2), an inlet pipeline first electromagnetic valve (5), an inlet pipeline second electromagnetic valve (6), an outlet pipeline first electromagnetic valve (3), an outlet pipeline second electromagnetic valve (4), a first filter screen (7), a first filter screen oppositely-clamping flange (71), a second filter screen (8), a second filter screen oppositely-clamping flange (81), a pressure regulating valve (9), a valve controller (12) and a cooling water connecting pipeline (30); cooling water inlet flange (1), cooling water outlet flange (2), the first solenoid valve of inlet pipe way (5), inlet pipe way second solenoid valve (6), the first solenoid valve of outlet pipe way (3), outlet pipe way second solenoid valve (4), first filter screen (7), first filter screen butt clamp flange (71), second filter screen (8), second filter screen butt clamp flange (81), air-vent valve (9) and heat transfer box (10) by cooling water connecting line (30) link together, cooling water connecting line (30) include four tee joints: a first tee joint (31), a second tee joint (32), a third tee joint (33) and a fourth tee joint (34), wherein the first tee joint (31) and the third tee joint (33) are connected through a pipeline, an inlet pipeline second electromagnetic valve (6) is arranged between the first tee joint (31) and the third tee joint (33), the first tee joint (31) and the fourth tee joint (34) are connected through a pipeline, an inlet pipeline first electromagnetic valve (5) is arranged between the first tee joint (31) and the fourth tee joint (34), the second tee joint (32) and the third tee joint (33) are connected through a pipeline, an outlet pipeline first electromagnetic valve (3) is arranged between the second tee joint (32) and the third tee joint (33), the second tee joint (32) and the fourth tee joint (34) are connected through a pipeline, and an outlet pipeline second electromagnetic valve is arranged between the second tee joint (32) and the fourth tee joint (34), third tee bend (33) and fourth tee bend (34) pass through the tube coupling, are equipped with first filter screen between third tee bend (33) and fourth tee bend (34) in proper order and are to pressing from both sides flange (71), first filter screen (7), air-vent valve (9), heat transfer box (10), second filter screen are to pressing from both sides flange (81) and second filter screen (8), first filter screen (7) by first filter screen is to pressing from both sides flange (71) clamp and install on cooling water pipeline (30), second filter screen (8) by second filter screen is to pressing from both sides flange (81) clamp and install on cooling water connecting line (30), first tee bend (31) surplus one end is connected cooling water inlet flange (1), second tee bend (32) surplus one end is connected cold water intaking outlet flange (2).

6. The cooling heat sink for a centrifugal pump according to claim 5, wherein: the valve controller (12) is arranged beside the pump (50), and the valve controller (12) is connected with the inlet pipeline first electromagnetic valve (5), the inlet pipeline second electromagnetic valve (6), the outlet pipeline first electromagnetic valve (3), the outlet pipeline second electromagnetic valve (4), the pressure regulating valve (9) and the temperature sensor (11) through communication control cables.

7. The cooling heat sink for a centrifugal pump according to claim 5, wherein: the cooling water connecting pipeline (30) uses a stainless steel seamless capillary tube, and the cooling water pipeline (30) is connected with a cooling water inlet flange (1), a cooling water outlet flange (2), an inlet pipeline first electromagnetic valve (5), an inlet pipeline second electromagnetic valve (6), an outlet pipeline first electromagnetic valve (3), an outlet pipeline second electromagnetic valve (4), a first filter screen butt-clamping flange (71), a second filter screen butt-clamping flange (81), a pressure regulating valve (9) and a heat exchange box (10) by using a clamping sleeve type joint.

8. The cooling heat sink for a centrifugal pump according to claim 5, wherein: the cooling water inlet flange (1), the cooling water outlet flange (2), the first electromagnetic valve (5) of the inlet pipeline, the second electromagnetic valve (6) of the inlet pipeline, the first electromagnetic valve (3) of the outlet pipeline, the second electromagnetic valve (4) of the outlet pipeline, the first filter screen butt-clamping flange (71), the first filter screen (7), the second filter screen butt-clamping flange (81), the second filter screen (8) and the pressure regulating valve (9) are made of stainless steel.

9. The cooling heat sink for a centrifugal pump according to claim 5, wherein: the mesh number of the first filter screen (7) and the second filter screen (8) is 20-200 meshes.

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