CN112462814B - Humidity, temperature and flow rate automatic control calibration device - Google Patents

Abstract

The invention discloses a humidity, temperature and flow rate automatic control calibration device, which comprises a liquid flow controller, a liquid high-temperature vaporizer, a first gas flow controller, a second gas flow controller, an automatic emptying device, a vaporized gas injection device, a product detection chamber, a temperature control device, a temperature sensor, a data acquisition controller and an intelligent terminal, wherein the gas inlet end of the first gas flow controller is connected with a gas source, and the gas outlet end of the first gas flow controller is connected with the liquid high-temperature vaporizer; and the gas inlet end of the second gas flow controller is connected with a gas source, and the gas outlet end of the second gas flow controller is connected with a vaporized gas injection device. The humidity, temperature and flow rate automatic control calibration device has accurate gas humidity control, can be used for research and test, and has wide application range.

Description

Humidity, temperature and flow rate automatic control calibration device

Technical Field

The invention relates to the technical field of gas temperature and humidity control, in particular to an automatic control and calibration device for humidity, temperature and flow rate.

Background

In short, the humidity is the content of water vapor in the gas, which is the absolute humidity, and is generally difficult to measure and understand, for example, when the humidity in the air at the current environment of 25 ℃ is 10g/m3 or 17.1g/kg, the meaning thereof cannot be effectively grasped. Humidity is an important parameter, which not only affects the comfort level of our daily life, but also relates to a plurality of links in the production process, and the physical performance, chemical shape and biological characteristics of the object to be examined can be changed remarkably due to improper humidity control. It can be known from an H-S enthalpy entropy diagram under standard atmospheric pressure that the control difficulty is increased in a geometric series manner, the curve trend of relative humidity is steeper, the existing gas temperature and humidity control is not accurate, and the use requirements of laboratories, universities, research institutes and the like cannot be met, so that the automatic control calibration device for the humidity, the temperature and the flow rate is particularly necessary.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the automatic control and calibration device for the humidity, the temperature and the flow rate, the gas humidity is accurately controlled, and the automatic control and calibration device can be used for research and test and has wide application range.

The purpose of the invention is realized by the following technical scheme:

a humidity, temperature and flow rate automatic control calibration device comprises a liquid flow controller, a liquid high-temperature vaporizer, a first gas flow controller, a second gas flow controller, an automatic emptying device, a vaporized gas injection device, a product detection chamber, a temperature control device, a temperature sensor, a data acquisition controller and an intelligent terminal,

the water inlet end of the liquid flow controller is connected with a water source, the water outlet end of the liquid flow controller is connected with a liquid high-temperature gasifier, the liquid high-temperature gasifier is connected with the automatic emptying device, the automatic emptying device is connected with the vaporized gas injection device, the vaporized gas injection device is connected with the product detection chamber, the product detection chamber is connected with the temperature control device, the temperature sensor is connected with the product detection chamber, the signal output end of the temperature sensor is connected with the first signal input end of the data acquisition controller, and the signal second input end of the data acquisition controller is connected with the signal output end of the intelligent terminal;

the gas inlet end of the first gas flow controller is connected with a gas source, and the gas outlet end of the first gas flow controller is connected with the liquid high-temperature gasifier; and the gas inlet end of the second gas flow controller is connected with a gas source, and the gas outlet end of the second gas flow controller is connected with a vaporized gas injection device.

Further, a vaporized water drop collector is connected between the automatic emptying device and the vaporized gas spraying device.

Further, a gas check valve is connected between the second gas flow controller and the vaporized gas injection device.

Further, the liquid high-temperature vaporizer comprises a sleeve, a vaporizing tube and an electric heating tube, the sleeve is sleeved outside the vaporizing tube, one end of the sleeve is connected with the gas outlet end of the first gas flow controller, the other end of the sleeve is connected with the emptying device, an opening is formed in the top end of the vaporizing tube, the bottom end of the vaporizing tube is connected with the water outlet end of the liquid flow controller, and the electric heating tube is connected with the vaporizing tube.

Furthermore, the gasification pipe is connected with a bypass pipe, a floating ball and a travel switch are arranged in the bypass pipe, the travel switch is arranged above the floating ball, and a signal output end of the travel switch is connected with a third signal input end of the data acquisition controller.

Furthermore, the emptying device comprises a reciprocating mechanism, an emptying tank and a sealing pipe, the emptying tank is connected with the liquid high-temperature gasifier, a tank body of the emptying tank is provided with a first air exhaust hole, the sealing pipe is sleeved outside the emptying tank in a sliding manner, and the sealing pipe is provided with a second air exhaust hole corresponding to the first air exhaust hole; the reciprocating mechanism is connected with one end of the sealing pipe, which is far away from the emptying tank.

Furthermore, the reciprocating mechanism comprises a fixed plate, a rectangular frame, an incomplete gear and a stepping motor, sliding plates are arranged at two ends of the rectangular frame and are in sliding connection with the fixed plate, and one sliding plate is connected with the sealing tube; the two inner side surfaces of the rectangular frame, which are parallel to the axis of the sealing pipe, are respectively provided with a rack, the teeth of the incomplete gear are meshed with the racks, and the output shaft of the stepping motor is connected with the incomplete gear.

Further, the sealed tube on be equipped with the sealed hole that first exhaust hole corresponds, be equipped with sealed plunger in the sealed hole, sealed plunger bottom is equipped with the inclined plane, first exhaust hole top be equipped with the step face that the inclined plane matches.

The invention has the beneficial effects that:

1) the humidity, temperature and flow rate automatic control calibration device has accurate gas humidity control, can be used for research and test, and has wide application range.

2) The bypass pipe is used for detecting the liquid high-temperature gasifier, and is convenient to maintain in time.

3) The reciprocating mechanism is realized by an incomplete gear, two parallel racks and a stepping motor, and the stepping motor is convenient to control.

4) The arranged sealing plunger seals the emptying tank, so that the gas in the emptying tank can be effectively prevented from leaking when the automatic emptying control device does not work.

Drawings

FIG. 1 is a schematic diagram of an overall structure of an automatic humidity, temperature and flow rate control calibration device according to an embodiment of the present invention;

FIG. 2 is a block diagram of the control principles of the data acquisition controller in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a high temperature liquid vaporizer according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a liquid high-temperature vaporizer provided with a bypass pipe according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an automatic evacuation device according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of the evacuation tank and the sealing tube in an evacuation state according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of the evacuation tank and the sealing tube in a sealed state according to the embodiment of the present invention;

FIG. 8 is an enlarged view of FIG. 7 taken at detail A;

in the figure, 1, a liquid flow controller; 2. a liquid high temperature vaporizer; 3. a first gas flow controller; 4. a second gas flow controller; 5. an automatic evacuation device; 6. a vaporized gas injection device; 7. a product detection chamber; 8. a temperature control device; 9. a temperature sensor; 10. a data acquisition controller; 11. an intelligent terminal; 12. a vaporized water droplet collector; 13. a gas check valve; 14. a sleeve; 15. a gasification pipe; 16. an electric heating tube; 17. a bypass pipe; 18. a floating ball; 19. a travel switch; 20. a reciprocating mechanism; 21. emptying the tank; 22. a sealing tube; 23. a first exhaust port; 24. a second vent hole; 25. a fixing plate; 26. a rectangular frame; 27. an incomplete gear; 28. a stepping motor; 29. a sliding plate; 30. a rack; 31. sealing the hole; 32. sealing the plunger; 33. a step surface; 34. a spring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 to 8, the present invention provides a technical solution:

example (b):

as shown in fig. 1 and fig. 2, a humidity, temperature and flow rate automatic control calibration device comprises a liquid flow controller 1, a liquid high-temperature vaporizer 2, a first gas flow controller 3, a second gas flow controller 4, anautomatic emptying device 5, a vaporizedgas injection device 6, aproduct detection chamber 7, atemperature control device 8, atemperature sensor 9, adata acquisition controller 10 and anintelligent terminal 11,

the water inlet end of the liquid flow controller 1 is connected with a water source, the water outlet end of the liquid flow controller 1 is connected with a liquid high-temperature gasifier 2, the liquid high-temperature gasifier 2 is connected with theautomatic emptying device 5, the automatic emptying device is connected with the vaporizedgas injection device 6, the vaporizedgas injection device 6 is connected with theproduct detection chamber 7, theproduct detection chamber 7 is connected with thetemperature control device 8, thetemperature sensor 9 is connected with theproduct detection chamber 7, the signal output end of thetemperature sensor 9 is connected with the first signal input end of thedata acquisition controller 10, and the signal second input end of the data acquisition controller is connected with the signal output end of theintelligent terminal 11;

the gas inlet end of the first gas flow controller 3 is connected with a gas source, and the gas outlet end of the first gas flow controller 3 is connected with the liquid high-temperature gasifier 2; the gas inlet end of the second gas flow controller 4 is connected with a gas source, and the gas outlet end of the second gas flow controller 4 is connected with the vaporizedgas injection device 6.

Wherein, thedata acquisition controller 10 is also connected with theautomatic emptying device 5, the vaporizedgas injection device 6, the first gas flow controller 3, the second gas flow controller 4 and the liquid flow controller 1. The gas flow controller may be, but is not limited to, a gas flow control valve, and the liquid flow controller 1 may be, but is not limited to, a liquid flow control valve. The connection among the flow controller, the liquid high-temperature gasifier 2, the first gas flow controller 3, the second gas flow controller 4, theautomatic emptying device 5, the vaporizedgas injection device 6 and theproduct detection chamber 7 is realized through pipelines. The outer sides of the pipelines from the liquid high-temperature vaporizer to theproduct detection chamber 7 are provided with electric tracing devices for heat preservation (the electric tracing devices are common heat preservation devices in the field and are not described herein). The liquid high-temperature gasifier 2 is used for heating and vaporizing liquid from a water source; theautomatic emptying device 5 is used for intermittently discharging humidified gas; the vaporizedgas injection device 6 is used to inject gas mixed with water vapor to a predetermined humidity into theproduct detection chamber 7. The liquid high-temperature gasifier 2, theautomatic emptying device 5, the vaporizedgas injection device 6 and thedata acquisition controller 10 are all devices commonly used in the field and are not described in detail here. The boil-off gas injection means 6 may be, but is not limited to, a model number LF-F or LV-F series liquid vaporizer such as LF-F20M-A, LF-F30M-A, LV-F20(PO/MO) manufactured by HORIBA STEC.

The working principle is as follows: first, thetemperature control device 8 is set to ensure that the temperature in the detection chamber is a constant preset value. The temperature of the electric tracing device is set to be the same as the preset value of the detection chamber. The flow rate of the liquid flow controller 1 is set, and the flow rate of the first gas flow controller 3 is set. Then ultrapure water or distilled water is added to the water source, and then the gas at the gas source is connected. The liquid enters the liquid high-temperature vaporizer 2 to be vaporized into steam, and the steam at the moment is steam in a non-pressure state, so the liquid cannot automatically enter theautomatic emptying device 5. After the water vapor is generated, the gas entering the liquid high-temperature gasifier 2 through the gas of the first gas flow controller 3 brings the water vapor into theautomatic emptying device 5.

After the water vapor of theautomatic evacuation device 5 enters the vaporgas injection device 6, the flow rate of the second gas flow controller 4 is set and opened. The gas passing through the second gas flow controller 4 enters the vaporized gas injection means 6 to be mixed with the water vapor therein, thereby reaching a gas of a predetermined humidity. The gas is then passed to theproduct detection chamber 7 for testing or other use.

Theautomatic evacuation device 5 and the vaporgas injection device 6 both operate intermittently. When theautomatic emptying device 5 works, the vaporizedgas injection device 6 stops working; when the vaporgas injection device 6 is operated, theautomatic evacuation device 5 is stopped. The purpose of this is to control the humidity of the gas in theproduct detection chamber 7. The situation that the humidity is too high due to the fact that the humidified gas is always introduced into theproduct detection chamber 7 is avoided.

And humidity control of the humidified gas: the water inlet amount of the liquid flow controller 1 is controlled so as to control the amount of the water vapor generated by the high-temperature vaporizer.

The injection frequency of the vaporizer injection device and the frequency of theautomatic evacuation device 5, and the liquid flow controller 1 and the gas flow controller are controlled by adata acquisition controller 10. When different frequencies, gas flow and liquid flow need to be set, parameters are manually input through the intelligent terminal 11 (a computer, a mobile phone and the like), theintelligent terminal 11 sends the parameters to thedata acquisition controller 10, and thedata acquisition controller 10 sends control signals to corresponding devices, so that automatic control of gas with different humidity requirements is realized.

The device is suitable for laboratories, universities and research institutes for scientific research of materials and research of various sensors. The method can be particularly applied to the sites where the research disciplines of materials or sensors have special requirements on temperature, gas flow rate and humidity. Meanwhile, the device can also test the interference and influence of temperature, gas flow rate and humidity on the product.

The device is particularly suitable for tests of special gases and is suitable for demand environments with small flow control, large humidity control range, large flow control range and large temperature control range.

The humidity, temperature and flow rate automatic control calibration device has accurate gas humidity control, can be used for research and test, and has wide application range.

Further, as shown in fig. 1 and 2, a vaporizedwater droplet collector 12 is connected between theautomatic evacuation device 5 and the vaporizedgas injection device 6. The vaporizedwater drop collector 12 is used for collecting and recycling the vaporized water drops, which is beneficial to saving cost and resources.

Further, as shown in fig. 1 and 2, agas check valve 13 is connected between the second gas flow controller 4 and the boil-offgas injection device 6. Agas check valve 13 is provided for preventing the gas in the boil-off gas injection means 6 from flowing backward through the second gas flow controller 4.

Further, as shown in fig. 3 and 4, the liquidhigh temperature vaporizer 2 includes asleeve 14, a vaporizingtube 15 and anelectric heating tube 16, thesleeve 14 is sleeved outside the vaporizingtube 15, one end of thesleeve 14 is connected to the gas outlet end of the first gas flow controller 3, the other end is connected to the evacuation device, an opening is formed at the top end of the vaporizingtube 15, the bottom end of the vaporizingtube 15 is connected to the water outlet end of the liquid flow controller 1, and theelectric heating tube 16 is connected to the vaporizingtube 15.

Theelectric heating tube 16 may be disposed outside the vaporizingtube 15 to indirectly heat water, or may be disposed inside the vaporizingtube 15 to directly heat water.

Water enters thegasification pipe 15 and is heated at high temperature (100-. And the gas entering through the first gas flow controller 3 synchronously enters thesleeve 14 to bring the water vapor in thesleeve 14 into theautomatic emptying device 5. The arrangement can avoid the contact between the gas entering through the first gas flow controller 3 and the liquid, and the process of the vapor entering the automatic emptying device is smoother.

Further, as shown in fig. 3 and 4, thegasification pipe 15 is connected to abypass pipe 17, a floatingball 18 and atravel switch 19 are disposed in thebypass pipe 17, the travel switch is disposed above the floatingball 18, and a signal output end of thetravel switch 19 is connected to a third signal input end of thedata acquisition controller 10.

Wherein thebypass pipe 17 is communicated with the lower end of the vaporizingpipe 15 through a pipe provided obliquely downward from the vaporizingpipe 15 toward thebypass pipe 17, so that the water vapor is prevented from entering thebypass pipe 17. Thebypass pipe 17 is arranged to monitor the amount of liquid in thegasification pipe 15, when thegasification pipe 15 fails, the level of the liquid in the gasification pipe rises (the amount of water vapor is less than the amount of water inflow), the liquid level in thebypass pipe 17 rises, the floatingball 18 is driven to rise, and the floatingball 18 rises to contact with thetravel switch 19. And further communicates with thetravel switch 19, and thetravel switch 19 sends the signal to thedata acquisition controller 10. At the moment, the fault of the high-temperature gasifier can be known, the steam quantity is insufficient, and the maintenance is convenient. Thebypass pipe 17 is used for detecting the liquid high-temperature gasifier 2, and is convenient to maintain in time.

Further, as shown in fig. 5-8, the evacuation device includes areciprocating mechanism 20, anevacuation tank 21 and a sealingpipe 22, theevacuation tank 21 is connected to the liquid high-temperature vaporizer 2, a tank body of theevacuation tank 21 is provided with afirst exhaust hole 23, the sealingpipe 22 is slidably sleeved outside theevacuation tank 21, and the sealingpipe 22 is provided with asecond exhaust hole 24 corresponding to thefirst exhaust hole 23; thereciprocating mechanism 20 is connected with one end of the sealingtube 22 far away from the emptyingtank 21.

Wherein, the laminating of sealedtube 22 inner wall andevacuation jar 21 outer wall, so set up in order to guarantee the sealed between sealedtube 22 and theevacuation jar 21, when avoidingfirst exhaust hole 23 andsecond exhaust hole 24 not to communicate,evacuation jar 21 gas leakage.

When the exhaust device is used, thereciprocating mechanism 20 drives the sealingpipe 22 to do reciprocating motion, so that thefirst exhaust hole 23 and thesecond exhaust hole 24 are communicated and disconnected, and the evacuation mechanism is enabled to perform intermittent exhaust. Wherein thereciprocator 20 may be, but is not limited to, a cylinder.

Further, as shown in fig. 5-8, thereciprocating mechanism 20 includes a fixedplate 25, arectangular frame 26, apartial gear 27 and a steppingmotor 28, wherein slidingplates 29 are disposed at two ends of therectangular frame 26, the slidingplates 29 are slidably connected to the fixedplate 25, and one slidingplate 29 is connected to the sealingtube 22; two inner side surfaces of therectangular frame 26 parallel to the axis of the sealingtube 22 are respectively provided with arack 30, gear teeth of theincomplete gear 27 are meshed with theracks 30, and an output shaft of the steppingmotor 28 is connected with theincomplete gear 27.

Thereciprocating mechanism 20 is realized by anincomplete gear 27, twoparallel racks 30 and a steppingmotor 28, and the steppingmotor 28 is convenient to control.

Further, as shown in fig. 5-8, the sealingtube 22 is provided with a sealinghole 31 corresponding to thefirst vent hole 23, a sealingplunger 32 is arranged in the sealinghole 31, an inclined surface is arranged at the bottom end of the sealingplunger 32, astep surface 33 matched with the inclined surface is arranged at the top end of thefirst vent hole 23, aspring 34 is arranged at the top end of the sealingplunger 32, and two ends of thespring 34 are respectively connected with the sealingplunger 32 and the hole wall of the sealinghole 31. The sealingplunger 32 is made of rubber, and the rubber sealing performance is good.

When theautomatic emptying device 5 does not work, the firstair exhaust hole 23 is coaxial with the sealinghole 31, at the moment, the sealingplunger 32 extends into the firstair exhaust hole 23 from the sealinghole 31 under the action of thespring 34, and the inclined surface of the sealingplunger 32 is attached to thestep surface 33 to complete sealing. When theautomatic emptying device 5 needs to work, thereciprocating mechanism 20 drives the sealingtube 22 to move, and the sealingplunger 32 is reset by thecompression spring 34 under the action of the second inclined surface and thestep surface 33.

The arranged sealing plunger seals the emptying tank, so that the gas in the emptying tank can be effectively prevented from leaking when the automatic emptying control device does not work.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (3)

1. The utility model provides a humidity temperature velocity of flow automated control calibration device which characterized in that: comprises a liquid flow controller, a liquid high-temperature gasifier, a first gas flow controller, a second gas flow controller, an automatic emptying device, a vaporized gas injection device, a product detection chamber, a temperature control device, a temperature sensor, a data acquisition controller and an intelligent terminal,

the water inlet end of the liquid flow controller is connected with a water source, the water outlet end of the liquid flow controller is connected with a liquid high-temperature gasifier, the liquid high-temperature gasifier is connected with the automatic emptying device, the automatic emptying device is connected with the vaporized gas injection device, the vaporized gas injection device is connected with the product detection chamber, the product detection chamber is connected with the temperature control device, the temperature sensor is connected with the product detection chamber, the signal output end of the temperature sensor is connected with the first signal input end of the data acquisition controller, and the signal second input end of the data acquisition controller is connected with the signal output end of the intelligent terminal;

the gas inlet end of the first gas flow controller is connected with a gas source, and the gas outlet end of the first gas flow controller is connected with the liquid high-temperature gasifier; the gas inlet end of the second gas flow controller is connected with a gas source, and the gas outlet end of the second gas flow controller is connected with the vaporized gas injection device;

a vaporized water drop collector is connected between the automatic emptying device and the vaporized gas injection device;

a gas check valve is connected between the second gas flow controller and the vaporized gas injection device;

the liquid high-temperature gasifier comprises a sleeve, a gasification pipe and an electric heating pipe, wherein the sleeve is sleeved outside the gasification pipe, one end of the sleeve is connected with the gas outlet end of the first gas flow controller, the other end of the sleeve is connected with the automatic emptying device, the top end of the gasification pipe is provided with an opening, the bottom end of the gasification pipe is connected with the water outlet end of the liquid flow controller, and the electric heating pipe is connected with the gasification pipe;

the gasification pipe is connected with a bypass pipe, a floating ball and a travel switch are arranged in the bypass pipe, the travel switch is arranged above the floating ball, and a signal output end of the travel switch is connected with a third signal input end of the data acquisition controller;

the automatic emptying device comprises a reciprocating mechanism, an emptying tank and a sealing pipe, wherein the emptying tank is connected with the liquid high-temperature gasifier, a tank body of the emptying tank is provided with a first air exhaust hole, the sealing pipe is sleeved outside the emptying tank in a sliding manner, and the sealing pipe is provided with a second air exhaust hole corresponding to the first air exhaust hole; the reciprocating mechanism is connected with one end of the sealing pipe, which is far away from the emptying tank.

2. The humidity, temperature and flow rate automatic control calibration device according to claim 1, wherein: the reciprocating mechanism comprises a fixed plate, a rectangular frame, an incomplete gear and a stepping motor, sliding plates are arranged at two ends of the rectangular frame and are in sliding connection with the fixed plate, and one sliding plate is connected with the sealing tube; the two inner side surfaces of the rectangular frame, which are parallel to the axis of the sealing pipe, are respectively provided with a rack, the teeth of the incomplete gear are meshed with the racks, and the output shaft of the stepping motor is connected with the incomplete gear.

3. The humidity, temperature and flow rate automatic control calibration device as claimed in claim 2, wherein: the sealed tube on be equipped with the sealed hole that first exhaust hole corresponds, be equipped with sealed plunger in the sealed hole, sealed plunger bottom is equipped with the inclined plane, first exhaust hole top be equipped with the step face that the inclined plane matches.

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