SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an utilize by the conveying gas to carry out pressurization driven liquefied gas from pressure boost vaporization conveying system.
In order to achieve the above object, the present invention provides a liquefied gas self-pressurization vaporization conveying system, which includes a storage tank for storing liquefied gas, a pressurization device, a first vaporizer, a gas distribution device, a user pipe network, and an injection port for injecting driving fluid, wherein the pressurization device includes a driving portion and a pressurization portion, the driving portion drives the pressurization portion to suck the liquefied gas in the storage tank and to pump the liquefied gas in a pressurization manner, the first vaporizer is communicated with an outlet of the pressurization portion and can vaporize the liquefied gas, the gas distribution device includes an inlet, a first outlet, and a second outlet, the inlet of the gas distribution device is communicated with an outlet of the first vaporizer, the first outlet is communicated with the user pipe network and the second outlet is communicated with the driving portion, the injection port is communicated with the second outlet and a pipe between the driving portions, the driving fluid is the liquefied gas with or without vaporization.
Preferably, the liquefied gas self-pressurization vaporization conveying system further comprises a second vaporizer arranged on a pipeline between the second outlet and the driving part and positioned between the injection port and the driving part, and the second outlet, the second vaporizer and the driving part are communicated in sequence.
Preferably, the gas distribution device comprises a first pressure reducing valve and a second pressure reducing valve, an outlet of the first pressure reducing valve is communicated with the first outlet, an outlet of the second pressure reducing valve is communicated with the second outlet, and an inlet of the gas distribution device is communicated with an inlet of the first pressure reducing valve and an inlet of the second pressure reducing valve respectively.
Preferably, the outlet pressure of the first pressure reducing valve is less than the outlet pressure of the second pressure reducing valve.
Preferably, the driving part comprises a commutator, a driving cavity and a driving piston arranged in the driving cavity, the driving cavity comprises a first driving air port and a second driving air port which are respectively arranged at two sides of the driving piston, an outlet of the second vaporizer is communicated with one of the first driving air port and the second driving air port through the commutator, and the other of the first driving air port and the second driving air port is communicated to the user pipe network through the commutator;
the pressurization part comprises a pressurization cavity, a pressurization piston and a piston rod, the pressurization cavity is arranged at one end of the driving cavity, one end of the piston rod is connected with the pressurization piston, the other end of the piston rod is connected with the driving piston, the pressurization cavity comprises a first pressurization opening and a second pressurization opening which are respectively arranged at two sides of the pressurization piston, the first pressurization opening is respectively communicated with the first vaporizer and the storage tank, a first one-way valve enabling fluid to only flow from the storage tank to the first pressurization opening is arranged between the first pressurization opening and the storage tank, and a second one-way valve enabling fluid to only flow from the first pressurization opening to the first vaporizer is arranged between the first pressurization opening and the first vaporizer.
Preferably, the pressurizing device comprises two groups of pressurizing parts which are respectively arranged at two ends of the driving cavity.
Preferably, the second pressurised opening is connected to the user pipe network.
Preferably, the second pressurizing opening is respectively communicated with the first vaporizer and the storage tank, a third one-way valve enabling fluid to flow from the storage tank to the second pressurizing opening only is arranged between the second pressurizing opening and the storage tank, and a fourth one-way valve enabling fluid to flow from the second pressurizing opening to the first vaporizer only is arranged between the second pressurizing opening and the first vaporizer.
Preferably, the reverser is a two-position five-way pneumatic valve, the two-position five-way pneumatic valve includes a first air port, a second air port, a third air port, a fourth air port, a fifth air port, a first transposition air port and a second transposition air port, an outlet of the second carburetor is communicated with the second air port, the first air port and the third air port are both communicated to the user pipe network, the fourth air port is communicated with the second driving air port, and the fifth air port is communicated with the first driving air port, when in a first position, the second air port is communicated with the fourth air port, the third air port is communicated with the fifth air port, when in a second position, the first air port is communicated with the fourth air port, and the second air port is communicated with the fifth air port;
the driving part also comprises a first reversing trigger switch and a second reversing trigger switch, and the first reversing trigger switch and the second reversing trigger switch are two-position two-way motorized valves; the first reversing trigger switch comprises a first trigger cavity, a first elastic piece arranged in the first trigger cavity and a first valve core, wherein one end of the first valve core is in contact with the first elastic piece, and the other end of the first valve core extends into the driving cavity; the second reversing trigger switch comprises a second trigger cavity, a second elastic piece arranged in the second trigger cavity and a second valve core, one end of the second valve core is in contact with the second elastic piece, and the other end of the second valve core extends into the driving cavity; the first trigger air port and the seventh trigger air port are communicated to the user pipe network, and the second trigger air port is communicated with the second transposition air port and the sixth trigger air port respectively; the third trigger air port and the fifth trigger air port are both communicated with an outlet of the second vaporizer, and the fourth trigger air port is respectively communicated with the first transposition air port and the eighth trigger air port;
when the driving piston moves to be close to the first driving air port, the first valve core is driven to move, so that the first triggering air port is communicated with the second triggering air port, the third triggering air port is communicated with the fourth triggering air port, meanwhile, the second valve core moves under the action of the second elastic element, so that the fifth triggering air port is disconnected with the sixth triggering air port, the seventh triggering air port is disconnected with the eighth triggering air port, and the liquefied gas which is vaporized again through the second vaporizer enters the first transposition air port, so that the two-position five-way pneumatic valve moves from the first position to the second position; when the driving piston moves to be close to the second driving air port, the second valve core is driven to move, the fifth triggering air port is communicated with the sixth triggering air port, the seventh triggering air port is communicated with the eighth triggering air port, meanwhile, the first valve core moves under the action of the first elastic element, the first triggering air port is disconnected with the second triggering air port, the third triggering air port is disconnected with the fourth triggering air port, and the liquefied gas which is vaporized again through the second vaporizer enters the second transposition air port, so that the two-position five-way pneumatic valve moves from the second position to the first position.
Preferably, the commutator is two-position five-way solenoid valve, two-position five-way solenoid valve includes first gas port, second gas port, third gas port, fourth gas port and fifth gas port, the export of second vaporizer with the second gas port intercommunication, the fourth gas port with second drive gas port intercommunication, just the fifth gas port with first drive gas port, when the primary importance, second gas port and fourth gas port intercommunication, the third gas port with the fifth gas port intercommunication, when the secondary importance, first gas port and fourth gas port intercommunication, the second gas port with the fifth gas port intercommunication.
Preferably, a first valve is disposed between the bottom of the storage tank and the first check valve and between the bottom of the storage tank and the third check valve, a fifth valve is disposed between the top of the storage tank and the first check valve and between the top of the storage tank and the third check valve, the filling port is communicated with a pipe between the second outlet and the driving part through a filling pipe, the filling pipe is provided with the third valve, a second valve is disposed between the second vaporizer and the driving part, and a fourth valve is disposed between the first outlet and the user pipe network.
Above-mentioned technical scheme absorbs the ambient heat through first vaporizer and makes liquefied gas vaporization and pressure boost, divides the gas device to send the liquefied gas after the vaporization into user's pipe network simultaneously, also sends the liquefied gas after the vaporization into supercharging device's drive part and drives supercharging device's pressure boost part absorption and pump sending liquefied gas to realize self-pressurization through being carried gas and carry. The technical scheme of the utility model only need first vaporizer absorption environment heat energy, and do not need other any energy and device to drive, do not need the engine, do not have power, fire source and heat source, when carrying inflammable and explosive liquefied gas, can not have the incident that arouses conflagration or explosion. Moreover, the supercharging device is driven by the conveyed gas, so that the purity of the conveyed gas does not change at all, and the high-purity gas can be conveyed. In addition, the storage tank does not need to bear higher pressure than the air pressure used by a user, and the conventional storage pressure of the liquefied gas is kept; the volume of the storage tank can be as large as several thousand cubic meters, and the cost of unit volume is low; moreover, the conveying pressure can be up to more than 15MP, the long-distance conveying can be carried out, and the method can be used for bottling oxygen, nitrogen and argon with the bottling pressure up to 15 MP.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a prior art electric piston pump for pressurized vaporization delivery of liquefied gases;
FIG. 2 is a schematic diagram of a prior art submersible pump for pressurized vaporization delivery of liquefied gases;
FIG. 3 is a schematic diagram of a prior art additional vapor-pressurized delivery of liquefied gas;
FIG. 4 is a schematic view of the liquefied gas self-pressurizing vaporization delivery system of the present invention;
FIG. 5 is a schematic diagram of the liquefied gas self-pressurizing vaporization delivery system of the present invention;
FIG. 6 is a schematic diagram of the first commutating trigger switch of FIG. 5;
FIG. 7 is a schematic diagram of the second commutating trigger switch of FIG. 5;
FIG. 8 is a schematic view of the commutator of FIG. 5;
FIG. 9 is a schematic view of a turbocharger device according to an embodiment;
fig. 10 is a schematic diagram of the operation of a self-pressurizing vaporization delivery system for liquefied gas according to another embodiment of the present invention.
Wherein,
1 storage tank 2 supercharging device
3 first vaporizer 4 gas distributing device
5 second vaporizer 6 user pipe network
7 injection port
10 piston pump 11 motor
12 frequency converter 13 gravity valve
14 immersed pump and 15 pump wells
16 supercharger 17 first regulating valve
18 second regulating valve
Q drive section Z boost section
C-shaped transmission shaft L injection pipeline
41 first pressure reducing valve 42 second pressure reducing valve
21 commutator 22 drive chamber
23-drive piston 24 booster cavity
25 pressurizing piston 26 piston rod
Q1 Primary drive Port Q2 Secondary drive Port
Z1 first plenum opening Z2 second plenum opening
D1 first check valve D2 second check valve
D3 third check valve D4 fourth check valve
D5 fifth check valve
H1 primary air port H2 secondary air port
H3 third Port H4 fourth Port
H5 fifth port H6 first shift port
H7 second transposition air port
C1 first commutation trigger switch C2 second commutation trigger switch
C11 Primary trigger air Port C12 Secondary trigger air Port
C13 third trigger air port C14 and fourth trigger air port
C21 fifth trigger air Port C22 sixth trigger air Port
C23 seventh trigger air port C24 eighth trigger air port
F1 first valve F2 second valve
F3 third valve F4 fourth valve
F5 fifth valve
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
The utility model provides a liquefied gas self-pressurization vaporization conveying system, which comprises a storage tank 1 for storing liquefied gas, a pressurization device 2, a first vaporizer 3 and a gas distribution device 4, the device comprises a user pipe network 6 and an injection port 7 for injecting a driving fluid, a pressurizing device 2 comprises a driving part Q and a pressurizing part Z, the driving part Q drives the pressurizing part Z to suck the liquefied gas in the storage tank 1 and pump the liquefied gas in a pressurizing mode, a first vaporizer 3 is communicated with an outlet of the pressurizing part Z and can vaporize the liquefied gas, a gas distribution device 4 comprises an inlet, a first outlet and a second outlet, the inlet of the gas distribution device 4 is communicated with an outlet of the first vaporizer 3, the first outlet is communicated with the user pipe network 6, the second outlet is communicated with the driving part Q, the injection port 7 is communicated with a pipeline between the second outlet and the driving part Q, and the driving fluid is the liquefied gas which passes through or does not pass through vaporization.
According to the technical scheme, the first vaporizer 3 absorbs the environmental heat to vaporize and pressurize the liquefied gas, the gas distribution device 4 sends the vaporized liquefied gas into the user pipe network 6, and simultaneously sends the vaporized liquefied gas into the driving part Q of the pressurizing device 2 to drive the pressurizing part Z of the pressurizing device 2 to suck and pump the liquefied gas (the pressure of the liquefied gas can be increased to 0.4-21 MPa), so that the self-pressurization conveying is realized through the conveyed gas. The technical scheme of the utility model only need first vaporizer absorption environment heat energy, and do not need other any energy and device to drive, do not need the engine, do not have power, fire source and heat source, when carrying inflammable and explosive liquefied gas, can not have the incident that arouses conflagration or explosion. Further, the pressurizer 2 is driven by the gas to be transported, so that the gas to be transported can be transported with high purity without any change in the purity of the gas to be transported. In addition, the storage tank 1 does not need to bear pressure higher than the air pressure for users, and the conventional storage pressure (about 0.015 MPa) of the liquefied gas is kept; the volume of the storage tank 1 can be as large as several thousand cubic meters, and the cost of unit volume is low; moreover, the conveying pressure can be up to more than 15MP, the long-distance conveying can be carried out, and the method can be used for bottling oxygen, nitrogen and argon with the bottling pressure up to 15 MP.
As shown in fig. 4 and 5, as a preferred embodiment, the liquefied gas self-pressurization vaporization conveying system of the present invention further includes a second vaporizer 5 disposed on the pipeline between the second outlet and the driving portion Q and located between the injection port 7 and the driving portion Q, and the second outlet, the second vaporizer 5 and the driving portion Q are sequentially communicated. At the time of the first start-up, the liquefied gas injected from the injection port 7 without being vaporized in the second vaporizer 5 and then enters the driving portion Q of the pressurization means 2, thereby driving the pressurization portion Z to suck the liquefied gas in the storage tank 1 and to pressurize and pump the liquefied gas. After the liquefied gas entering the first vaporizer 3 is vaporized, one part of the liquefied gas enters a user pipe network 6 along a pipeline, and the other part of the liquefied gas enters the second vaporizer 5, so that circulation is realized, and the purpose of continuously supplying gas to the outside is achieved. In normal use state, the second vaporizer 5 vaporizes and re-vaporizes the liquid, the volume is increased continuously, the pressure is increased a lot, and the temperature reaches normal temperature. If the pressure of the gas required by the user is less than 1MPa, the second vaporizer 5 is not needed.
As shown in fig. 5, the air distributor 4 includes a first pressure reducing valve 41 and a second pressure reducing valve 42, an outlet of the first pressure reducing valve 41 is communicated with a first outlet, an outlet of the second pressure reducing valve 42 is communicated with a second outlet, and an inlet of the air distributor 4 is respectively communicated with an inlet of the first pressure reducing valve 41 and an inlet of the second pressure reducing valve 42. The outlet pressure of the first pressure reducing valve 41 and the second pressure reducing valve 42 is set to a preset value, so that the pressure in the system is basically stable, and automatic pressure regulation is realized. Specifically, the pressure increasing device 2 has the function of adjusting the pressure and the amount, because the pressure of the gas divided by the first pressure reducing valve 41 and the second pressure reducing valve 42 of the gas dividing device 4 is substantially constant, and the driving force of the gas to the pressure increasing device 2 is also substantially constant. When the pressure in the first carburetor 3 rises, the working resistance of the supercharging device 2 also increases, the working speed of the supercharging device also slows down, the conveying capacity is reduced, and when the resistance and the driving force are balanced, the supercharging device 2 automatically stops working, so that the purposes of automatic pressure regulation and capacity regulation are achieved.
Wherein the outlet pressure of the first pressure reducing valve 41 is lower than the outlet pressure of the second pressure reducing valve 42, so that the gas flowing out of the second pressure reducing valve 42 and through the driving portion Q can enter the user pipe network 6. In the present embodiment, the outlet pressure of the first pressure reducing valve 41 is set to 3.0MPa, the outlet pressure of the second pressure reducing valve 42 is set to 3.5MPa, and the temperature of the gas discharged from the second pressure reducing valve 42 is lowered by the pressure reduction, but the gas enters the second vaporizer 5 to absorb heat, and then the temperature is raised to a temperature close to the ambient temperature. When the gas enters the driving part Q, the pressure can reach 3.5MPa, the outlet side pressure of the driving part Q communicated with the user pipe network 6 is close to 3.0MPa, and under the action of the pressure difference close to 0.5MPa, the driving part Q does work and extrudes the gas in the driving part Q into the user pipe network 6.
Further, as shown in fig. 5, the drive portion Q includes a commutator 21, a drive chamber 22, and a drive piston 23 (preferably, an area of an end portion thereof minus a sectional area of a piston rod 26 described later is 900 square millimeters) provided in the drive chamber 22. The drive chamber 22 includes a first drive air port Q1 and a second drive air port Q2 provided on either side of the drive piston 23, respectively, and the outlet of the second vaporizer 5 is communicated through a diverter 21 to one of the first drive air port Q1 and the second drive air port Q2 while the other of the first drive air port Q1 and the second drive air port Q2 is communicated through the diverter 21 to the user pipe network 6. The gas from the second vaporizer 5 enters one side of the driving piston 23 of the driving part Q (the pressure can reach 3.5MPa), and the first driving gas port Q1 or the second driving gas port Q2 on the other side of the driving piston 23 communicates with the user pipe network 6 (the pressure is close to 3.0MPa), so that under the action of the pressure difference close to 0.5MPa, the driving piston 23 moves from the high pressure side to the low pressure side, and the gas on the low pressure side is squeezed into the user pipe network 6 by the driving piston 23.
And the pressurizing section Z includes a pressurizing chamber 24, a pressurizing piston 25 (preferably, an end surface area of which is 100 square millimeters), and a piston rod 26, the pressurizing chamber 24 is provided at one end of the driving chamber 22, one end of the piston rod 26 is connected to the pressurizing piston 25 and the other end is connected to the driving piston 23, the pressurizing chamber 24 includes a first pressurizing opening Z1 and a second pressurizing opening Z2 provided at both sides of the pressurizing piston 25, respectively, the first pressurizing opening Z1 is communicated with the first vaporizer 3 and the storage tank 1, respectively, and a first check valve D1 for allowing the fluid to flow only from the storage tank 1 to the first pressurizing opening Z1 is provided between the first pressurizing opening Z1 and the storage tank 1, and a second check valve D2 for allowing the fluid to flow only from the first pressurizing opening Z1 to the first vaporizer 3 is provided between the first pressurizing opening Z1 and the first vaporizer 3.
The liquefied gas vaporized by the second vaporizer 5 enters the left side (or right side) of the driving piston 23 of the pressurization device 2 from the gas inlet of the diverter 21, and pushes the driving piston 23 to move to the right (or left), and the gas in the right side (or left side) of the driving cavity 22 enters the user pipe network 6 through the gas outlet of the diverter 21. At the same time, the movement of the driving piston 23 drives the pressurizing piston 25 to move through the piston rod 26, so that the side with increased volume in the pressurizing cavity 24 forms negative pressure, thereby sucking the liquefied gas in the storage tank 1, and then pressing the sucked liquefied gas into the first vaporizer 3 (the pressure of the liquefied gas pressed into the first vaporizer 3 can be as high as 4.5MPa) through the reverse movement of the pressurizing piston 25 (the pressurizing piston 25 moves under the driving of the driving piston 23). In the present embodiment, the effective area of the end surface of the driving piston 23 is preferably set to be 9 times the area of the end surface of the booster piston 25. Because there is a piston connecting rod 26 between the driving piston 23 and the booster piston 25, the axial force of the gas acting on the driving piston 23 and the axial force of the liquid gas acting on the booster piston 25 can be transmitted to each other. If the friction between the parts is not taken into account, the medium (liquefied gas) on which the booster piston 25 acts can generate a pressure of 4.5MPa (9 times the area multiplied by the differential pressure (0.5MPa) across the drive piston 25) according to the law that pressure is inversely proportional to area. Wherein it is ensured that liquefied gas can only flow from the tank 1 to the first vaporizer 3 and not in the reverse direction, under the co-action of the first check valve D1 and the second check valve D2.
As a preferred embodiment, the supercharging device 2 comprises two sets of supercharging portions Z arranged at the two ends of the drive chamber 22, respectively. The pressurizing pistons 25 of the two sets of pressurizing parts Z are respectively connected to both sides of the driving piston 23 through the piston rods 26, so that when the pressurizing part Z at one end sucks the liquefied gas, the pressurizing part Z at the other end presses the liquefied gas into the first vaporizer 3, the sucking and pumping of the liquefied gas by the two sets of pressurizing parts Z are alternately performed, the working efficiency of the pressurizing device 2 is improved, and the work of the driving part Q is also utilized to the maximum.
Also, as shown in FIG. 5, the second plenum opening Z2 is a breathing opening for plenum chamber 24. In this embodiment, the second supercharging opening Z2 is connected to the user pipe network 6, and since the amount of change of the liquefied gas in the supercharging chamber 24 is much smaller than the amount of gas used by the user pipe network 6, the connection of the second supercharging opening Z2 to the user pipe network 6 does not affect the gas use of the user pipe network 6. Meanwhile, the dynamic seals (the dynamic seal of the pressurizing piston 25 and the dynamic seal of the driving piston 23) of the pressurizing device 2 are not communicated with the outside, and if leakage exists, the dynamic seals can be recycled into the user pipe network 6, so that waste is avoided, the environment is protected, and potential safety hazards are avoided.
In another embodiment, as shown in fig. 9, second plenum opening Z2 communicates with first vaporizer 3 and storage tank 1, respectively, and a third check valve D3 is provided between second plenum opening Z2 and storage tank 1 to allow fluid to flow only from storage tank 1 to second plenum opening Z2, and a fourth check valve D4 is provided between second plenum opening Z2 and first vaporizer 3 to allow fluid to flow only from second plenum opening Z2 to first vaporizer 3. Wherein the combined action of the third check valve D3 and the fourth check valve D4 ensures that liquefied gas can only flow from the tank 1 to the first vaporizer 3 and not in the reverse direction. So set up for the same group pressure boost part Z can absorb and pump liquefied gas simultaneously, thereby has further promoted supercharging device 2's work efficiency. Furthermore, the supercharging device 2 can also comprise two sets of supercharging segments Z of this embodiment which are arranged at the two ends of the drive chamber 22, respectively, in a manner similar to that of fig. 5 in which the supercharging segments Z are arranged at the two ends.
Further, as shown in fig. 5, the commutator 21 is preferably a two-position five-way pneumatic valve. The two-position five-way pneumatic valve comprises a first air port H1, a second air port H2 (namely an air inlet of the reverser 21), a third air port H3, a fourth air port H4, a fifth air port H5 (namely an air outlet of the reverser 21), a first transposition air port H6 and a second transposition air port H7, an outlet of the second carburetor 5 is communicated with the second air port H2, the first air port H1 and the third air port H3 are communicated with the user pipe network 6, the fourth air port H4 is communicated with the second driving air port Q2, and the fifth air port H5 is communicated with the first driving air port Q1. In the first position (as shown in FIG. 8), the second port H2 is in communication with the fourth port H4, and the third port H3 is in communication with the fifth port H5; in the second position, the first port H1 is in communication with the fourth port H4, and the second port H2 is in communication with the fifth port H5.
Furthermore, the driving portion Q further includes a first change-over trigger switch C1 and a second change-over trigger switch C2, and the first change-over trigger switch C1 and the second change-over trigger switch C2 are preferably two-position, two-way motor-driven valves (other valve bodies capable of performing the same function are also possible). As shown in fig. 6, the first reversing trigger switch C1 includes a first trigger chamber, a first elastic element disposed in the first trigger chamber, and a first valve core having one end contacting the first elastic element and the other end extending into the driving chamber 22, wherein the first trigger chamber is provided with a first trigger air port C11, a second trigger air port C12, a third trigger air port C13, and a fourth trigger air port C14. As shown in fig. 7, the second direction-changing trigger switch C2 includes a second trigger cavity, a second elastic element disposed in the second trigger cavity, and a second valve core having one end contacting the second elastic element and the other end extending into the driving cavity 22, wherein the second trigger cavity is provided with a fifth trigger air port C21, a sixth trigger air port C22, a seventh trigger air port C23, and an eighth trigger air port C24. The first trigger air port C11 and the seventh trigger air port C23 are communicated to a user pipe network 6, and the second trigger air port C12 is communicated with the second transposition air port H7 and the sixth trigger air port C22 respectively; the third trigger air port C13 and the fifth trigger air port C21 are both communicated with the outlet of the second carburetor 5, and the fourth trigger air port C14 is respectively communicated with the first transposition air port H6 and the eighth trigger air port C24. Wherein, the first elastic member and the second elastic member are both preferably springs.
When the driving piston 23 moves to be close to the first driving air port Q1, the first valve core is driven to move, so that the first trigger air port C11 is communicated with the second trigger air port C12, the third trigger air port C13 is communicated with the fourth trigger air port C14, meanwhile, the second valve core moves under the action of the second elastic element, so that the fifth trigger air port C21 is disconnected from the sixth trigger air port C22, and the seventh trigger air port C23 is disconnected from the eighth trigger air port C24. The liquefied gas that is vaporized again by the second vaporizer 5 enters the first shift port H6 to move the two-position, five-way pneumatic valve from the first position to the second position. At this time, the liquefied gas re-vaporized by the second vaporizer 5 enters the left side of the drive chamber 22 through the second port H2, the fifth port H5, and the first drive port Q1, and drives the drive piston 23 to move rightward, and the second drive port Q2 is connected to the user pipe network 6 through the fourth port H4 and the first port H1.
When the driving piston 23 moves to be close to the second driving gas port Q2, the second spool is driven to move, so that the fifth trigger gas port C21 is communicated with the sixth trigger gas port C22, the seventh trigger gas port C23 is communicated with the eighth trigger gas port C24, and at the same time, the first spool moves under the action of the first elastic member, so that the first trigger gas port C11 is disconnected from the second trigger gas port C12, the third trigger gas port C13 is disconnected from the fourth trigger gas port C14, and the liquefied gas which is vaporized again by the second vaporizer 5 enters the second shift gas port H7, so that the two-position five-way air-operated valve moves from the second position to the first position. At this time, the liquefied gas re-vaporized by the second vaporizer 5 enters the right side of the drive chamber 22 through the second port H2, the fifth port H5, and the second drive port Q2, drives the drive piston 23 to move leftward, and the first drive port Q1 communicates with the user pipe network 6 through the fifth port H5 and the third port H3, and so on.
In another embodiment, the diverter 21 may be a two-position, five-way solenoid valve that includes a first port H1, a second port H2 (i.e., the inlet port of the diverter 21), a third port H3, a fourth port H4, and a fifth port H5 (i.e., the outlet port of the diverter 21). Wherein the outlet of the second carburetor 5 is in communication with the second port H2, the fourth port H4 is in communication with the second drive port Q2, and the fifth port H5 is in communication with the first drive port Q1, in a first position (as shown in fig. 8), the second port H2 is in communication with the fourth port H4, the third port H3 is in communication with the fifth port H5, in a second position, the first port H1 is in communication with the fourth port H4, and the second port H2 is in communication with the fifth port H5. The position of the driving piston 23 is detected by a position detecting element, and a two-position five-way solenoid valve is controlled by a position signal of the driving piston 23.
Further, a first valve F1 is provided between the bottom of tank 1 and first check valve D1 and the bottom of tank 1 and third check valve D3, and a fifth valve F5 is provided between the top of tank 1 and first check valve D1 and the top of tank 1 and third check valve D3. The injection port 7 is in communication with the second outlet and the driving portion Q via an injection line L provided with a third valve F3, a second valve F2 between the second vaporizer 5 and the driving portion Q, and a fourth valve F4 between the first outlet and the user pipe network 6. The running state of the liquefied gas self-pressurization vaporization conveying system can be controlled by opening and closing the valves.
The liquefied gas self-pressurization vaporization conveying system of the utility model also has the function of automatic air supply supplement, which is an emergency supply protection function indispensable for large-scale air supply systems. Because the pressure change in the user pipe network 6 can cause the pressure change in the first vaporizer 3, thereby affecting the use change of the pressure boosting device 2, as long as the first valve F1, the second valve F2 and the fourth valve F4 in the system are normally open, when the large-scale gas supply system is completely powered off, the conventional gas supply device will be stopped and the user still uses gas, the pressure in the user pipe network 6 will drop, and then the pressure in the first vaporizer 3 will drop, at this time, the working resistance in the pressure boosting device 2 will also drop, so that the pressure boosting device 2 will automatically start, pump out the liquefied gas liquid reserved in the large-scale gas supply system in advance, and vaporize after pressurization, and continue to automatically supply gas to the user pipe network 6.
In addition, as shown in fig. 10, in another embodiment, the driving portion Q of the pressure boosting device 2 may be a pneumatic motor, the pressure boosting portion Z may be a vane pump, and the pneumatic motor and the vane pump are connected and driven by a driving shaft C, an inlet of the vane pump is communicated with an outlet of the storage tank 1, and a fifth check valve D5 (corresponding to the first check valve D1 in the system shown in fig. 5) is provided on a pipeline between the inlet of the vane pump and the outlet of the storage tank 1, and the fifth check valve D5 allows fluid to flow only from the storage tank 1 to the vane pump and not to flow in a reverse direction. The outlet of the vane pump is communicated with the inlet of the first vaporizer 3, the inlet of the pneumatic motor is communicated with the second vaporizer 5, the outlet of the pneumatic motor is communicated with the user pipe network 6, the pneumatic motor is driven by the gas from the second vaporizer 5 to rotate, and the pneumatic motor drives the vane pump to rotate through the transmission shaft C, so that the vane pump absorbs the liquefied gas in the storage tank 1 and pumps the liquefied gas in a pressurizing way. The liquefied gas self-pressurization vaporization conveying system shown in fig. 10 has the same working principle and working process as the liquefied gas self-pressurization vaporization conveying system shown in fig. 5 except for the part of the pressurization device 2, and the working principle and the working process are not repeated here.
Further, the present invention also provides a liquefied gas self-pressurization vaporization conveying method according to the liquefied gas self-pressurization vaporization conveying system, wherein the method comprises a first starting step, a conveying stopping step and a restarting step. Wherein the first start-up step comprises injecting a driving fluid from the injection port 7, the driving fluid entering the driving portion Q of the pressurization device 2, causing the driving portion Q to drive the pressurization portion Z to suck the liquefied gas in the storage tank 1 and to pressurize and pump the liquefied gas to the first vaporizer 3, the first vaporizer 3 sucking heat to vaporize the liquefied gas, the vaporized liquefied gas reentering the driving portion Q through the second outlet of the gas distribution device 4 to cause the driving portion Q to drive the pressurization portion Z; stopping the injection of the driving fluid; after the pressure in the first vaporizer 3 reaches a predetermined value, the vaporized liquefied gas enters the user pipe network 6 through the first outlet of the gas distribution device 4. By driving the pressurizing device 2 with the gas to be delivered, the purity of the gas to be delivered does not change at all, and thus the gas with high purity can be delivered. The device is not driven by an engine, has no power supply, fire source and heat source, and does not cause fire or explosion safety accidents when inflammable and explosive liquefied gases are conveyed.
Specifically, at the time of initial start-up, the first valve F1 and the fifth valve F5 are manually opened to allow liquefied gas in the storage tank 1 to enter the vicinity of the pressure increasing device 2, and then the fifth valve F5 is closed; then the second valve F2 and the third valve F3 are opened, and the fourth valve F4 is closed; after manually injecting a small amount of liquid or gas to be delivered from the injection port 7, the third valve F3 is closed. After the manually injected liquid or gas is vaporized by the second vaporizer 5, the driving pressure device 2 sucks the liquefied gas in the storage tank 1 and pumps the liquefied gas into the first vaporizer 3 for vaporization; the first vaporizer 3 vaporizes the liquefied gas, the volume of the liquefied gas is greatly increased by hundreds of times, the pressure is also increased greatly, and the temperature reaches the normal temperature; when the gas from the first vaporizer 3 passes through the gas distributor 4, the fourth valve F4 is closed, so that the gas completely enters the second vaporizer 5, the temperature of the gas is raised to normal temperature again, and then the gas drives the pressure booster 2 to further absorb the liquefied gas in the storage tank 1 and inject the liquefied gas into the first vaporizer 3; after the gas for driving the supercharging device 2 to do work comes out of the supercharging device 2, the gas enters a user pipe network 6 along a pipeline. Because the volume of liquid sucked by the pressurizing means 2 after vaporization is much larger than the volume of gas consumed for driving. So circulated, the gas in the first vaporizer 3 is increased and its pressure is raised, and after a while, the gas pressure reaches a predetermined value. At this time, the fourth valve F4 is manually opened, and the gas separator 4 separates the excess gas and supplies it directly to the user pipe network 6. Because the gas distributing device 4 distributes gas properly, the gas pressure in the first vaporizer 3 is not increased any more, and the steady state is maintained. At the moment, the starting state of the system is finished, and the system enters a normal gas supply state. The gas delivery pressure is realized by adjusting the pressure difference of the two outlets of the gas distributing device 4 and the pressurization ratio of the pressurization device 2.
Wherein, the step of stopping conveying comprises the steps of cutting off the air inlet of the driving part Q, stopping the work of the supercharging device 2, cutting off the liquid inlet of the supercharging part Z, and cutting off the air supply of the user pipe network 6 after the pressure in the first gasifier 3 begins to drop, so that the residual air with a certain pressure is kept in the system.
Specifically, when the delivery needs to be stopped, the second valve F2 is closed, the air intake of the driving portion Q of the booster device 2 is cut off, and the booster device 2 stops operating; closing the first valve F1, cutting off the feed of the pressurized part Z, and opening the fifth valve F5 to return the liquefied gas in the pipeline to the storage tank 1; when the pressure in the first vaporizer 3 begins to drop, the fourth valve F4 is immediately closed, so that the residual air with a certain pressure is maintained in the system for use when the system is restarted.
Secondly, the restart step includes the feed liquor of the pressure boost part Z, the air intake of the drive part Q is recovered, the residual air enters the drive part Q, the pressure boost device 2 recovers to work, and after the pressure in the first vaporizer 3 reaches the preset value, the air supply of the user pipe network 6 is recovered.
Specifically, the first valve F1 and the fifth valve F5 are manually opened, and the fifth valve F5 is closed after liquefied gas enters the vicinity of the pressure boosting device 2; then the second valve F2 is opened, the residual air in the first vaporizer 3 enters the pressure boosting device 2, and after the driving part Q works, the residual air goes to the user pipe network 6 for users, and the pressure boosting device 2 recovers the work; the gas pressure in the first vaporizer 3 is continuously raised, and after a period of time, the gas pressure reaches a predetermined value; at this time, the fourth valve F4 is manually opened, the gas distributor 4 distributes the excess gas to directly supply to the user pipe network 6, the gas pressure in the system is not increased any more, and the steady state is maintained. The system is restarted and enters a normal air supply state.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the details of the above embodiments, and the technical solution of the present invention can be modified in a variety of ways within the scope of the technical idea of the present invention, for example, the driving part of the supercharging device can be transformed into various piston cylinders or pneumatic motors, and the supercharging part of the supercharging device can be transformed into various pumps; for example, the two pressure reducing valves in the gas distribution device can be deformed into various pressure reducing valves or can be deformed into other various pressure regulating devices. These variants all belong to the scope of protection of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.
In addition, any combination of the various embodiments of the present invention can be made, as long as it does not violate the idea of the present invention (the delivered liquefied gas is pressurized and vaporized by a pump device using the vaporized gas as a driving force), and it should be considered as the disclosure of the present invention.