CN111022923A - Bottleneck valves of hydrogen cylinder - Google Patents
Bottleneck valves of hydrogen cylinder Download PDFInfo
- Publication number
- CN111022923A CN111022923A CN201911403385.5A CN201911403385A CN111022923A CN 111022923 A CN111022923 A CN 111022923A CN 201911403385 A CN201911403385 A CN 201911403385A CN 111022923 A CN111022923 A CN 111022923A
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- Prior art keywords
- pressure reducing
- valve
- main
- channel
- valve body
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 73
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 73
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000007789 gas Substances 0.000 claims abstract description 49
- 230000000903 blocking effect Effects 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000006837 decompression Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000010408 film Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The application provides a bottle mouth valve group of a hydrogen cylinder, which comprises a main valve, a one-way valve, a stop valve and a pressure reducing valve, wherein the main valve is provided with a first mounting groove, a second mounting groove, a main channel, an inflation channel and an deflation channel, and a first opening for communicating the inside of the hydrogen cylinder and a second opening for mounting the stop valve are respectively formed at two ends of the main channel; the stop valve is inserted in the main channel of the main valve in a sliding manner, the check valve is arranged in the first mounting groove, and the pressure reducing valve is arranged in the second mounting groove; inflation channel's one end extends to the inner wall of main entrance, and the other end extends to the bottom surface of first mounting groove, and deflation channel's one end extends to the inner wall of main entrance, and the other end extends to the bottom surface of second mounting groove, and first opening, first inflation inlet, first relief port and second opening set up according to the preface along main entrance's extending direction. The internal gas flow channel structure of the valve group can be simplified, the structure of the valve group is simpler and more compact, and the inflation and deflation of the valve group are conveniently controlled.
Description
Technical Field
The application belongs to the technical field of hydrogen storage, and particularly relates to a bottle mouth valve bank of a hydrogen cylinder.
Background
In the development of the unmanned aerial vehicle, the endurance time is always a big problem, and the theoretical endurance time of the existing general full-state unmanned aerial vehicle is only dozens of minutes short and is difficult to satisfy. And the hydrogen fuel cell that adopts the technology more mature and the performance is more stable is as duration power source, not only environmental protection but also duration time prolongs several times, and actual measurement duration time has been thrown away the lithium cell unmanned aerial vehicle of present mainstream far away after. A hydrogen supply system of a hydrogen fuel cell power unmanned aerial vehicle mainly comprises a composite material hydrogen cylinder and a bottleneck valve. Generally, store high-pressure hydrogen in the hydrogen cylinder, the bottleneck valve of hydrogen cylinder not only need have the function of aerifing and the function of bleeding, still need turn into low pressure hydrogen with the high-pressure hydrogen in the hydrogen cylinder moreover in the gassing process, just can provide lasting stable fuel for unmanned aerial vehicle's pile, but there is the inside gas circulation structure complex technical problem of bottleneck valve usually.
Content of application
An object of the application is to provide a bottleneck valves of hydrogen cylinder to solve the inside gaseous circulation structure complicated technical problem of bottleneck valve of hydrogen cylinder.
In order to achieve the purpose, the technical scheme adopted by the application is as follows: a bottleneck valve group of a hydrogen cylinder comprises a main valve, a one-way valve, a stop valve and a pressure reducing valve, wherein the main valve is provided with a first mounting groove, a second mounting groove, a main channel, an inflation channel and an deflation channel, and two ends of the main channel extend to the outer surface of the main valve and respectively form a first opening for communicating the inside of the hydrogen cylinder and a second opening for mounting the stop valve; the stop valve is inserted in the main channel of the main valve in a sliding mode through the second opening of the main valve, the one-way valve is installed in the first installation groove, and the pressure reducing valve is installed in the second installation groove; inflation channel's one end extends to the inner wall of main entrance is in order to form first inflation inlet, and the other end extends to the bottom surface of first mounting groove is in order to form the second inflation inlet, the one end of gassing passageway extends to the inner wall of main entrance is in order to form first gas outlet, and the other end extends to the bottom surface of second mounting groove is in order to form the second gas outlet, first opening, first inflation inlet, first gas outlet and second opening are followed the extending direction of main entrance sets up according to the preface.
Furthermore, the check valve comprises a check valve body and a check valve core, the check valve body is provided with a gas flow passage, two ends of the gas flow passage are respectively provided with an opening and are communicated with the inflation channel of the main valve, the check valve core is arranged in the gas flow passage of the check valve body in a sliding mode, the gas flow passage of the check valve body is provided with a first annular step surface located between the check valve core and the inlet end of the gas flow passage, a first sealing ring is arranged on the first annular step surface, the check valve core is matched with the first sealing ring in an abutting mode, and a first spring is connected between the check valve core and the outlet end of the gas flow passage of the check valve body.
Furthermore, the check valve body is detachably connected with a plugging cap, and the plugging cap comprises a cap body covering the inlet end of the gas flow passage of the check valve body and a plugging head fixed between the cap body and the check valve body; the outer periphery of the one-way valve body is provided with an external thread, and the inner periphery of the cap body is provided with an internal thread matched with the external thread of the one-way valve body; the cap body is provided with an insertion hole for the plugging head to insert, one side of the plugging head is in butt fit with the edge of the insertion hole of the cap body, and the other opposite side of the plugging head is in butt fit with the inlet end of the gas flow passage of the one-way valve body.
Furthermore, the stop valve comprises a connecting rod inserted in the main channel of the main valve through a second opening thread of the main valve, a stop valve core fixedly connected to one end of the connecting rod, and a hand wheel fixedly connected to the other end of the connecting rod, and the stop valve core is slidably arranged between the second opening of the main channel of the main valve and the first inflation port.
Further, the main passage of the main valve is provided with a second annular step surface located between the first inflation port and the first deflation port, and the stop valve core is in abutting fit with the surface or the inner edge of the second annular step surface.
Further, a first filter is arranged in the airflow channel of the one-way valve body, and a second filter is arranged at the first opening of the main valve.
Further, the pressure reducing valve comprises a pressure reducing valve body and a first-stage pressure reducing valve core, the pressure reducing valve body is fixed on the main valve, the pressure reducing valve body is provided with a first-stage pressure reducing cavity, the air release channel and the first-stage pressure reducing cavity are communicated with each other, the first-stage pressure reducing valve core is arranged in the first-stage pressure reducing cavity in a sliding mode, and a second spring is connected between the first-stage pressure reducing valve core and the main valve.
Further, the pressure reducing valve further comprises a second-stage pressure reducing valve core, the pressure reducing valve body is provided with a second-stage pressure reducing cavity, the air discharging channel, the first-stage pressure reducing cavity and the second-stage pressure reducing cavity are sequentially communicated, the second-stage pressure reducing valve core is arranged in the second-stage pressure reducing cavity in a sliding mode, a third spring is connected between the second-stage pressure reducing valve core and the pressure reducing valve body, the second-stage pressure reducing valve core is connected with a pressing plate used for driving the second-stage pressure reducing valve core to compress the third spring, the pressing plate is connected with a driving portion used for driving the pressing plate to be close to and far away from the second-stage.
Furthermore, the driving part is in threaded connection with the pressure reducing valve body, one side of the secondary pressure reducing valve core is connected with an adjusting rod penetrating through an air outlet of the secondary pressure reducing cavity, the third spring is connected between the other side, opposite to the secondary pressure reducing valve core, of the secondary pressure reducing valve core and the pressure reducing valve body, and the end part, away from the secondary pressure reducing valve core, of the adjusting rod is in butt fit with the pressure plate.
Furthermore, the driving part is inserted with a connecting column in a sliding mode, one end, facing the second-stage pressure reduction valve core, of the connecting column is provided with a blocking part, the pressing plate is arranged on the connecting column in a sliding mode and located between the driving part and the blocking part, the end, deviating from the second-stage pressure reduction valve core, of the adjusting rod is provided with a pressing plate, and the pressure reduction valve body is further provided with a thin film located between the pressing plate and the pressing plate.
The valve bank has the advantages that the check valve, the stop valve and the pressure reducing valve are integrated on the main valve, and the first opening, the first inflation opening, the first deflation opening and the second opening are sequentially arranged on the main channel of the main valve, so that the inflation process and the deflation process can share one main channel, the internal gas flow passage structure of the valve bank can be simplified, and the structure of the valve bank is simpler and more compact; the stop valve is arranged in the main channel in a sliding manner, so that the connection and disconnection between the deflation channel and the main channel can be conveniently controlled, and the inflation and deflation of the valve bank can be further controlled; through the relief pressure valve that sets up and exhaust passage intercommunication, make the high-pressure hydrogen in the hydrogen cylinder can decompress and become low pressure hydrogen and discharge, improve the security, provide continuous stable fuel for unmanned aerial vehicle's pile.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
Wherein, each mark in the figure is:
1. a main valve; 11. a first opening; 111. a second filter; 12. a second opening; 13. a main channel; 131. a second annular step surface; 14. a first inflation port; 15. a first relief port; 16. a second inflation port; 17. a second relief port; 18. an inflation channel; 19. an air discharge passage; 2. a one-way valve; 21. a check valve body; 211. a gas flow channel; 212. a first annular step surface; 213. a first seal ring; 214. a first filter; 22. a one-way valve core; 23. a first spring; 24. a plugging cap; 241. a cap body; 242. plugging a plug; 243. a jack; 244. an annular groove; 245. a second seal ring; 3. a stop valve; 31. a connecting rod; 32. a cut-off valve core; 33. a hand wheel; 4. a pressure reducing valve; 41. a pressure reducing valve body; 411. a first stage decompression chamber; 412. a second spring; 413. a secondary decompression chamber; 414. a third spring; 42. a primary pressure reducing valve core; 43. a secondary pressure reducing valve core; 44. pressing a plate; 45. a drive section; 46. a fourth spring; 47. adjusting a rod; 471. tabletting; 48. connecting columns; 481. a blocking portion; 49. a film; 51. a first mounting groove; 52. a second mounting groove; .
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and operate, and thus are not to be construed as limiting the patent, and the specific meanings of the above terms will be understood by those skilled in the art according to specific situations. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
A bottleneck valve group of a hydrogen cylinder is shown in figure 1 and comprises a main valve 1, a one-way valve 2, a stop valve 3 and a pressure reducing valve 4, wherein the main valve 1 is provided with a first installation groove 51, a second installation groove 52, a main channel 13, an inflation channel 18 and a deflation channel 19, and two ends of the main channel 13 extend to the outer surface of the main valve and respectively form a first opening 11 for communicating the inside of the hydrogen cylinder and a second opening 12 for installing the stop valve 3. The stop valve is inserted in the main channel 13 of the main valve 1 through the second opening 12 of the main valve 1 in a sliding mode, the check valve 2 is installed in the first installation groove 52, and the reducing valve 4 is installed in the second installation groove 53; one end of the inflation channel 18 extends to the inner wall of the main channel 13 to form a first inflation port 14, the other end extends to the bottom surface of the first mounting groove 51 to form a second inflation port 16, one end of the deflation channel 19 extends to the inner wall of the main channel 13 to form a first deflation port 15, the other end extends to the bottom surface of the second mounting groove 52 to form a second deflation port 17, and the first opening 11, the first inflation port 14, the first deflation port 15, and the second opening 12 are sequentially arranged along the extending direction of the main channel 13.
During inflation, the stop valve 3 slides downwards in the main channel 13 of the main valve 1 to a position for blocking the first deflation port 15, at this time, the deflation channel 19 and the main channel 13 are blocked, the inflation channel 18 is communicated with the first opening 11 of the main channel 13 through the first inflation port 14, and external hydrogen enters the hydrogen cylinder from the first opening 11 through the check valve 2, the inflation channel 18 and the main channel 13 in sequence. During deflation, the stop valve 3 slides upwards in the main channel 13 of the main valve 1 to a position for opening the first deflation port 15, at this time, the deflation channel 19 is communicated with the first opening 11 of the main channel 13 through the first deflation port 15, and the high-pressure hydrogen in the hydrogen bottle is discharged outwards through the main channel 13, the deflation channel 19 and the pressure reducing valve 4 in sequence.
According to the valve bank, the check valve 2, the stop valve 3 and the pressure reducing valve 4 are integrated on the main valve 1, and the first opening 11, the first inflation opening 14, the first deflation opening 15 and the second opening 12 are sequentially arranged on the main channel 13 of the main valve 1, so that the inflation process and the deflation process can share one main channel 13, the internal gas flow channel structure of the valve bank can be simplified, and the structure of the valve bank is simpler and more compact; the stop valve 3 is arranged in the main channel 13 in a sliding manner, so that the connection and disconnection between the deflation channel 19 and the main channel 13 can be conveniently controlled, and the inflation and deflation of the valve bank can be further controlled; through setting up relief pressure valve 4 with exhaust passage intercommunication, make the high-pressure hydrogen in the hydrogen cylinder can decompress and become low pressure hydrogen and discharge, improve the security, provide continuous stable fuel for unmanned aerial vehicle's pile.
Further, the check valve 2 includes a check valve body 21 and a check valve core 22, the check valve body 22 is fixedly installed in the first installation groove 51, the check valve body 22 has a gas flow passage 211 with two ends respectively opened and communicated with the inflation channel 18 of the main valve 1, the check valve core 22 is slidably installed in the gas flow passage 211 of the check valve body 21, the gas flow passage 211 of the check valve body 21 is provided with a first annular step surface 212 located between the check valve core 22 and the inlet end of the gas flow passage 211, the first annular step surface 212 is provided with a first sealing ring 213, the check valve core 22 is in abutting fit with the first sealing ring 213, and a first spring 23 is connected between the check valve core 22 and the outlet end of the gas flow passage 211 of the check valve body 21.
During inflation, external hydrogen enters from the inlet end of the gas flow passage of the check valve body 21, the check valve spool 22 compresses the first spring 23 rightward under the pressure of the external hydrogen, so that the check valve spool 22 and the first sealing ring 213 are separated from each other, and the external hydrogen can flow out from the outlet end through the gas flow passage 211 of the check valve body 21 and enter the inflation passage 18 of the main valve 1. On the contrary, the pressure of the high-pressure hydrogen in the hydrogen cylinder on the check valve 22 cannot separate the first sealing ring 213 and the check valve 22 from each other, i.e. the gas flow can only flow from the inlet end to the outlet end of the gas flow passage 211 of the check valve body 21, but cannot flow from the outlet end to the inlet end.
Further, the check valve body 21 is detachably connected with a plugging cap 24, and the plugging cap 24 comprises a cap body 241 covering the inlet end of the gas flow passage 211 of the check valve body 21 and a plugging head 242 fixed between the cap body 241 and the check valve body 21; the outer periphery of the check valve body 21 is provided with an external thread, and the inner periphery of the cap body 241 is provided with an internal thread matched with the external thread of the check valve body 21; the cap body 241 is provided with an insertion hole 243 into which the plugging head 242 is inserted, one side of the plugging head 242 is in abutting fit with the edge of the insertion hole 243 of the cap body 241, and the opposite side is in abutting fit with the inlet end of the gas flow passage 211 of the check valve body 21.
When the gas is not inflated, the blocking head 242 is clamped and fixed on the cap body 241 and the check valve body 21 through the threaded connection of the cap body 241 and the check valve body 21, one side of the blocking head 242 abuts against the inlet end of the gas flow passage 211 of the check valve body 21 to block the inlet end of the gas flow passage 211 of the check valve body 21, so that dust accumulation at the inlet end of the gas flow passage 211 of the check valve body 21 is reduced, the blocking head 242, the cap body 241 and the check valve body 21 are detachably connected, and the blocking head 242, the cap body 241 and the check valve body 21 can be separated from each other, so that foreign matters in the blocking cap 24 can be conveniently cleaned after the blocking.
Furthermore, an annular groove 244 is formed on the surface of the blocking head 242, which is in abutting fit with the inlet end of the gas flow passage 211 of the check valve body 21, a second sealing ring 245 is arranged in the annular groove 244, and the inlet end of the gas flow passage 211 of the check valve body 21 is in abutting fit with the second sealing ring 245 on the blocking head 242, so that dust accumulation at the inlet end of the gas flow passage 211 of the check valve body 21 can be further reduced.
Further, the stop valve 3 includes a connecting rod 31 screwed to the main passage 13 of the main valve 1 through the second opening 12 of the main valve 1, a stop valve core 32 fixedly connected to one end of the connecting rod 31, and a hand wheel 33 fixedly connected to the other end of the connecting rod 31, wherein the stop valve core 32 is slidably disposed between the second opening 12 of the main passage 13 of the main valve 1 and the first inflation port 14.
An external thread is arranged on the outer peripheral surface of the connecting rod 31, an internal thread is arranged on the second opening 12 of the main valve 1, the connecting rod 31 is connected with the second opening 12 of the main valve 1 through the thread, and when a hand wheel 33 at one end of the connecting rod 31 is rotated, a stop valve core 32 at the other end of the connecting rod 31 can slide on the second opening 12 and the first inflation port 14 in the main channel 13 of the main valve 1; when the stop valve core 32 slides from the second opening 12 to the first inflation inlet 14, the deflation channel 19 and the main channel 13 can be cut off, the inflation channel 18 is communicated with the first opening 11 of the main channel 13 through the first inflation inlet 14, and external hydrogen enters the hydrogen cylinder from the first opening 11 through the check valve 2, the inflation channel 18 and the main channel 13 in sequence; when the cut-off valve core 32 slides from the first charging port 14 to the second opening 12, the gas release channel 19 can be communicated with the first opening 11 of the main channel 13 through the first gas release port 15, and the high-pressure hydrogen in the hydrogen bottle is discharged outwards through the main channel 13, the gas release channel 19 and the reducing valve 4 in sequence.
Further, the main passage 13 of the main valve 1 is provided with a second annular step surface 131 between the first inflation port 14 and the first deflation port 15, and the shut-off spool 32 is in abutting engagement with a surface or an inner edge of the second annular step surface 131. In the present embodiment, the shutoff valve body 32 is provided in a conical shape, and the conical surface of the shutoff valve body 32 is brought into abutting engagement with the inner edge of the second annular step surface 131, so that the air bleeding passage 19 is shut off from the main passage 13.
Further, a first filter 214 is provided in the gas flow passage 211 of the check valve body 21, and a second filter 111 is provided in the first opening 11 of the main valve 1. During charging, external hydrogen sequentially passes through the first filter 214 and the second filter 111 and then enters the inside of the hydrogen cylinder, so that impurities in the external hydrogen are effectively blocked; in the use process of the hydrogen cylinder, a small amount of impurities such as rust are generated in the hydrogen cylinder, even if external hydrogen is filtered by the first filter 214 and the second filter 111 during inflation, certain impurities still exist in the high-pressure hydrogen in the hydrogen cylinder during deflation, and the second filter 111 can filter the hydrogen again during deflation.
Further, the pressure reducing valve 4 includes a pressure reducing valve body 41 and a primary pressure reducing valve core 42, the pressure reducing valve body 41 is fixed on the main valve 1, specifically, is fixedly installed in the second installation groove 52; the pressure reducing valve body 41 has a first-stage pressure reducing chamber 411, the air bleeding passage 19 and the first-stage pressure reducing chamber 411 are communicated with each other, the first-stage pressure reducing valve core 42 is slidably disposed in the first-stage pressure reducing chamber 411, and a second spring 412 is connected between the first-stage pressure reducing valve core 42 and the outer surface of the main valve 1. During deflation, high-pressure hydrogen inside the hydrogen bottle enters the first-stage pressure reduction cavity 411 after passing through the main channel 13 and the deflation channel 19, the first-stage pressure reduction valve core 42 in the first-stage pressure reduction cavity 411 slides rightwards under the pressure of the high-pressure hydrogen and enables the second spring 412 to be stretched, the high-pressure hydrogen pushes the first-stage pressure reduction valve core 42 to slide and enables the second spring 412 to be stretched, and the pressure of the hydrogen when the hydrogen is discharged outwards through the gas flow channel 211 of the first-stage pressure reduction valve core 42 is reduced according to the law of conservation of energy.
Further, the pressure reducing valve 4 further comprises a second-stage pressure reducing valve core 43, the pressure reducing valve body 41 is provided with a second-stage pressure reducing cavity 413, the air bleeding channel 19, the first-stage pressure reducing cavity 411 and the second-stage pressure reducing cavity 413 are sequentially communicated, the second-stage pressure reducing valve core 43 is slidably arranged in the second-stage pressure reducing cavity 413, a third spring 414 is connected between the second-stage pressure reducing valve core 43 and the pressure reducing valve body 41, the second-stage pressure reducing valve core 43 is connected with a pressure plate 44 used for driving the second-stage pressure reducing valve core 43 to compress the third spring 414, the pressure plate 44 is connected with a driving part 45 which drives the pressure plate 44 to be close to and far away from.
The pressing plate 44 is moved by the driving portion 45 in a direction approaching the secondary pressure reducing valve body 43, and the pressing plate 44 contacts the secondary pressure reducing valve body 43 to compress the third spring 414, and the fourth spring 46 between the pressing plate 44 and the driving portion 45 is also compressed, so that the secondary pressure reducing valve body 43 receives the elastic force of the third spring 414 and the pressure of the pressing plate 44 (the pressure is derived from the elastic force of the fourth spring 46 on the pressing plate 44) to be in a balanced state. During air release, the hydrogen decompressed by the primary decompression cavity 411 enters the secondary decompression cavity 413, the pressure of the hydrogen is unstable, at this time, the secondary decompression valve core 43 is still subjected to the pressure of the hydrogen on the basis of the stress balance, the secondary decompression valve core 43 is in dynamic balance under the combined action of the pressure of the hydrogen, the elastic force of the third spring 414 and the pressure of the pressure plate 44, and the pressure of the hydrogen after passing through the secondary decompression valve core 43 is further reduced and is in a stable pressure state.
Further, the driving part 45 is connected to the pressure reducing valve body 41 in a threaded manner, one side of the secondary pressure reducing valve core 43 is connected with an adjusting rod 47 penetrating through the air outlet of the secondary pressure reducing cavity 413, the third spring 414 is connected between the other side, opposite to the secondary pressure reducing valve core 43, of the pressure reducing valve body 41, and the end part, away from the secondary pressure reducing valve core 43, of the adjusting rod 47 is in abutting fit with the pressure plate 44. An external thread is arranged on the outer peripheral surface of the driving part 45, an internal thread is arranged in the pressure reducing valve body 41, the driving part 45 is connected with the pressure reducing valve body 41 through the thread of the driving part 45, the driving part 45 can be rotated to drive the press plate 44 to push the adjusting rod 47 to move leftwards through the fourth spring 46, and meanwhile, the third spring 414 and the fourth spring 46 are compressed; the pressure of hydrogen gas at the outlet of the secondary decompression chamber 413 can be further adjusted by controlling the elastic force of the fourth spring 46 by the rotation driving portion 45.
Furthermore, a connecting column 48 is inserted into the driving part 45 in a sliding manner, a blocking part 481 is arranged at one end, facing the secondary pressure reducing valve core 43, of the connecting column 48, the pressing plate 44 is arranged on the connecting column 48 in a sliding manner and located between the driving part 45 and the blocking part 481, a pressing sheet 471 is arranged at the end part, deviating from the secondary pressure reducing valve core 43, of the adjusting rod 47, and a film 49 located between the pressing sheet 471 and the pressing plate 44 is further arranged on the pressure reducing valve body 41. By sliding the plug-in connection column 48 on the driving part 45, the pressing plate 44 can slide left and right on the connection column 48 and can not be separated from the connection column 48; the pressing sheet 471 of the end part of the adjusting rod 47 departing from the secondary pressure reducing valve core 43 can increase the stress area of the pressure of the pressing plate 44 on the secondary pressure reducing valve core 43, the film 49 is arranged between the pressing plate 44 and the pressing sheet 471, the hydrogen in the secondary pressure reducing cavity 413 can be prevented from leaking outwards through the driving part 45, and the pressing plate 44 can enable the pressing sheet 471 of the end part of the adjusting rod 47 to be stressed by extruding the film 49 by utilizing the elasticity of the film 49.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The bottleneck valve group of the hydrogen cylinder is characterized by comprising a main valve, a one-way valve, a stop valve and a pressure reducing valve, wherein the main valve is provided with a first mounting groove, a second mounting groove, a main channel, an inflation channel and an deflation channel, and two ends of the main channel extend to the outer surface of the main valve and respectively form a first opening for communicating the inside of the hydrogen cylinder and a second opening for mounting the stop valve; the stop valve is inserted in the main channel of the main valve in a sliding mode through the second opening of the main valve, the one-way valve is installed in the first installation groove, and the pressure reducing valve is installed in the second installation groove; inflation channel's one end extends to the inner wall of main entrance is in order to form first inflation inlet, and the other end extends to the bottom surface of first mounting groove is in order to form the second inflation inlet, the one end of gassing passageway extends to the inner wall of main entrance is in order to form first gas outlet, and the other end extends to the bottom surface of second mounting groove is in order to form the second gas outlet, first opening, first inflation inlet, first gas outlet and second opening are followed the extending direction of main entrance sets up according to the preface.
2. The cylinder mouth valve group of hydrogen cylinder as defined in claim 1, wherein said check valve includes a check valve body and a check valve core, said check valve body has a gas flow channel with two ends opened respectively and connected to the inflation channel of said main valve, said check valve core is slidably disposed in the gas flow channel of said check valve body, said gas flow channel of said check valve body is provided with a first annular step surface between said check valve core and the inlet end of said gas flow channel, said first annular step surface is provided with a first sealing ring, said check valve core is in abutting fit with said first sealing ring, and a first spring is connected between said check valve core and the outlet end of said gas flow channel of said check valve body.
3. The cylinder mouth valve group of hydrogen cylinder as recited in claim 2, wherein the check valve body is detachably connected with a plugging cap, the plugging cap comprises a cap body covering the inlet end of the gas flow passage of the check valve body and a plugging head fixed between the cap body and the check valve body; the outer periphery of the one-way valve body is provided with an external thread, and the inner periphery of the cap body is provided with an internal thread matched with the external thread of the one-way valve body; the cap body is provided with an insertion hole for the plugging head to insert, one side of the plugging head is in butt fit with the edge of the insertion hole of the cap body, and the other opposite side of the plugging head is in butt fit with the inlet end of the gas flow passage of the one-way valve body.
4. The cylinder mouth valve group of hydrogen cylinder as recited in claim 1, wherein the stop valve comprises a connecting rod inserted into the main passage of the main valve through the second opening of the main valve, a stop valve core fixedly connected to one end of the connecting rod, and a hand wheel fixedly connected to the other end of the connecting rod, and the stop valve core is slidably disposed between the second opening of the main passage of the main valve and the first inflation port.
5. The port valve set for a hydrogen cylinder as set forth in claim 4, wherein the main passage of the main valve is provided with a second annular step surface between the first fill port and the first vent port, and the shut-off valve spool is in abutting engagement with a surface or an inner edge of the second annular step surface.
6. The mouthpiece valve set for hydrogen cylinders of claim 2, wherein a first filter is disposed in the air flow passage of the check valve body, and a second filter is disposed at the first opening of the main valve.
7. The cylinder mouth valve group of hydrogen cylinder as defined in claim 1, wherein said pressure reducing valve includes a pressure reducing valve body and a primary pressure reducing valve core, said pressure reducing valve body is fixed on said main valve, said pressure reducing valve body has a primary pressure reducing chamber, said air release passage and said primary pressure reducing chamber are communicated with each other, said primary pressure reducing valve core is slidably disposed in said primary pressure reducing chamber, and a second spring is connected between said primary pressure reducing valve core and said main valve.
8. The bottle opening valve bank of a hydrogen cylinder as claimed in claim 7, wherein the pressure reducing valve further comprises a secondary pressure reducing valve core, the pressure reducing valve body is provided with a secondary pressure reducing cavity, the air release channel, the primary pressure reducing cavity and the secondary pressure reducing cavity are sequentially communicated, the secondary pressure reducing valve core is slidably arranged in the secondary pressure reducing cavity, a third spring is connected between the secondary pressure reducing valve core and the pressure reducing valve body, the secondary pressure reducing valve core is connected with a pressure plate for driving the secondary pressure reducing valve core to compress the third spring, the pressure plate is connected with a driving part for driving the pressure plate to be close to and far away from the secondary pressure reducing valve core, and a fourth spring is connected between the driving part and the pressure plate.
9. The cylinder mouth valve group of a hydrogen cylinder as claimed in claim 8, wherein the driving part is screwed to the pressure reducing valve body, one side of the secondary pressure reducing valve core is connected with an adjusting rod passing through the air outlet of the secondary pressure reducing chamber, the third spring is connected between the other side of the secondary pressure reducing valve core opposite to the pressure reducing valve body, and the end of the adjusting rod departing from the secondary pressure reducing valve core is in butt fit with the pressure plate.
10. The cylinder mouth valve group of hydrogen cylinder as claimed in claim 9, wherein the driving part is inserted with a connecting post in a sliding manner, one end of the connecting post facing the secondary pressure reducing valve core is provided with a blocking part, the pressing plate is arranged on the connecting post in a sliding manner and located between the driving part and the blocking part, the end of the adjusting rod facing away from the secondary pressure reducing valve core is provided with a pressing plate, and the pressure reducing valve body is further provided with a film located between the pressing plate and the pressing plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911403385.5A CN111022923B (en) | 2019-12-30 | 2019-12-30 | Bottleneck valve group of hydrogen bottle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911403385.5A CN111022923B (en) | 2019-12-30 | 2019-12-30 | Bottleneck valve group of hydrogen bottle |
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| CN111022923B CN111022923B (en) | 2024-09-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843424A (en) * | 2020-12-31 | 2021-05-28 | 宁波新高流体控制技术有限公司 | Medical oxygen valve |
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| CN111022923B (en) | 2024-09-27 |
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