CN115823307A - High-pressure pneumatic pressure reducing valve for hydrogen energy automobile - Google Patents
High-pressure pneumatic pressure reducing valve for hydrogen energy automobile Download PDFInfo
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- CN115823307A CN115823307A CN202211652871.2A CN202211652871A CN115823307A CN 115823307 A CN115823307 A CN 115823307A CN 202211652871 A CN202211652871 A CN 202211652871A CN 115823307 A CN115823307 A CN 115823307A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000001257 hydrogen Substances 0.000 title claims abstract description 66
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 66
- 230000009471 action Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 55
- 229920003023 plastic Polymers 0.000 claims description 18
- 239000004033 plastic Substances 0.000 claims description 18
- 229920006351 engineering plastic Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention relates to the technical field of pressure reducing valves, in particular to a high-pressure pneumatic pressure reducing valve for a hydrogen energy vehicle, which comprises a primary pressure reducing valve and a secondary pressure reducing valve, wherein an air inlet of the primary pressure reducing valve and an end cover of the primary pressure reducing valve are respectively connected with the lower end face and the upper end face of a valve body of the primary pressure reducing valve through flanges, a push rod of the primary pressure reducing valve, a spring of the primary pressure reducing valve are coaxially matched with the valve body of the primary pressure reducing valve, the spring of the primary pressure reducing valve is coaxially nested in the push rod of the primary pressure reducing valve, the upper end face of the push rod of the primary pressure reducing valve is tightly attached to the lower end face of the end cover of the primary pressure reducing valve under the action of the spring of the primary pressure reducing valve, and a throttling port A is formed by the lower end face of the push rod of the primary pressure reducing valve and the upper end face of the air inlet of the primary pressure reducing valve. The throttle valve A is automatically reduced when the air inlet pressure is high, and the throttle valve A is gradually increased when the air inlet pressure is low.
Description
Technical Field
The invention relates to the technical field of pressure reducing valves, in particular to a high-pressure pneumatic pressure reducing valve for a hydrogen energy automobile.
Background
Compared with the traditional internal combustion engine automobile, the fuel cell utilizes hydrogen as fuel, the hydrogen is compressed by the air compressor and then stored, and then flows out of the internal combustion engine through the pressure reducing valve for use in the running process of the internal combustion engine.
The pressure reduction method of the existing pneumatic pressure reducing valve comprises the following steps: a sealing element is arranged at the hydrogen inlet to seal the inlet, a compressed spring is arranged above the sealing element, high-pressure hydrogen enters from the inlet to push the sealing element to move upwards, and a gap between the sealing element and the inlet forms a throttling effect;
the existing pneumatic pressure reducing valve pressure reducing method has the following defects: the hydrogen inlet is in a sealing state in a normal state, the pressure reduction effect is determined according to the pressure of hydrogen entering from the inlet, when the pressure of the hydrogen inlet is large, the pressure reduction effect is poor, the pressure of the gas outlet is high, when the pressure of the hydrogen inlet is small, the gap is reduced, and the pressure of the gas outlet is reduced along with the pressure, so that the pressure of the gas outlet can fluctuate along with the pressure of the entering hydrogen, and the problem is not solved fundamentally.
Therefore, a high-pressure pneumatic pressure reducing valve for a hydrogen powered vehicle is required to solve the above problems.
Disclosure of Invention
In order to solve the above problems, the present invention provides a high-pressure pneumatic pressure reducing valve for a hydrogen energy vehicle, which can solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high-pressure pneumatic relief pressure valve that hydrogen energy source car was used, includes one-level relief pressure valve and second grade relief pressure valve, one-level relief pressure valve comprises one-level relief pressure valve end cover, one-level relief pressure valve body, one-level relief pressure valve push rod, the first O type sealing washer of one-level relief pressure valve, one-level relief pressure valve exhaust hole, one-level relief pressure valve spring, one-level relief pressure valve second O type sealing washer and one-level relief pressure valve air inlet, one-level relief pressure valve air inlet and one-level relief pressure valve end cover all adopt the flange to be connected with one-level relief pressure valve body lower extreme face and up end respectively, one-level relief pressure valve push rod, one-level relief pressure valve spring and the coaxial cooperation of one-level relief pressure valve body, one-level relief pressure valve push rod is at terminal surface under one-level relief pressure valve spring's the effect and the terminal surface closely laminates under one-level relief pressure valve end cover, choke A is constituteed to one-level relief pressure valve push rod lower extreme end and relief pressure valve one-level air inlet up end, the first O type sealing washer of one-level relief pressure valve and one-level relief pressure valve second O type sealing washer are all nested on one-level relief pressure valve push rod, form the tight seal of one-level relief pressure valve with one-level relief pressure valve push rod and one-level relief pressure valve body, the side wall in one-level relief pressure valve spring appearance chamber is installed to one-level relief pressure valve.
Preferably, the secondary pressure reducing valve comprises a secondary pressure reducing valve air inlet, a secondary pressure reducing valve first O-shaped sealing ring, a secondary pressure reducing valve seat, a secondary pressure reducing valve spring, a secondary pressure reducing valve second O-shaped sealing ring, a secondary pressure reducing valve push rod, a secondary pressure reducing valve outlet pressure measuring port, a secondary pressure reducing valve body, a secondary pressure reducing valve outlet, a secondary pressure reducing valve air inlet plastic sealing gasket, a secondary pressure reducing valve third O-shaped sealing ring, a secondary pressure reducing valve vent hole and a secondary pressure reducing valve safety valve, wherein the secondary pressure reducing valve air inlet plastic sealing gasket is nested in the secondary pressure reducing valve air inlet, the secondary pressure reducing valve body is connected with the secondary pressure reducing valve seat through external threads, the secondary pressure reducing valve air inlet, the secondary pressure reducing valve seat and the secondary pressure reducing valve push rod are coaxially matched and connected to form a sliding pair and are axially coaxial with an air passage of the secondary pressure reducing valve body, a throttle port B is formed by the secondary pressure reducing valve push rod left end face and the secondary pressure reducing valve seat and the secondary pressure reducing valve push rod, the secondary pressure reducing valve outlet is connected with the right end face of the secondary pressure reducing valve body in a threaded manner, and the side wall of a cavity where the secondary pressure reducing valve is located is provided with the secondary pressure reducing valve vent hole.
Preferably, the throttling port A is composed of a primary pressure reducing valve push rod and a primary pressure reducing valve air inlet, the primary pressure reducing valve push rod is of a conical valve core structure, and the material is made of plastics.
Preferably, the primary pressure reducing valve vent hole enables a volume cavity where the primary pressure reducing valve spring is located to be always communicated with the atmosphere when the pressure of the primary pressure reducing valve push rod is adjusted.
Preferably, the plastic sealing gasket for the air inlet of the secondary pressure reducing valve is made of engineering plastics.
Preferably, the secondary pressure reducing valve safety valve is installed on the secondary pressure reducing valve air outlet section.
Preferably, the secondary pressure reducing valve vent hole enables a volume cavity where the secondary pressure reducing valve spring is located to be always communicated with the atmosphere when the pressure of the secondary pressure reducing valve push rod is adjusted.
Preferably, the outlet section of the secondary pressure reducing valve is provided with a secondary pressure reducing valve outlet pressure measuring port.
Compared with the prior art, the invention has the beneficial effects that:
the high-pressure pneumatic pressure reducing valve for the hydrogen energy automobile is provided with a primary pressure reducing valve, an air inlet is in a normally open design, and a throttling opening A can be reversely adjusted along with the magnitude of air inlet pressure, namely the throttling opening A is automatically reduced when the air inlet pressure is high, and the throttling opening A is gradually increased when the air inlet pressure is low;
meanwhile, when the high-pressure hydrogen is depressurized, a two-stage pressure reducing valve is added, the two-stage pressure reducing valve is connected in series, the inlet high-pressure hydrogen is depressurized through the one-stage pressure reducing valve, the pressure of the hydrogen is rapidly reduced to be slightly greater than the pressure required by the hydrogen internal combustion engine, the high-precision and low-vibration control of the pressure of the hydrogen after primary depressurization is realized by the two-stage pressure reducing valve, and a foundation is laid for improving the stable and satisfactory hydrogen for the hydrogen internal combustion engine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic front sectional view of the present invention.
Description of the drawings: 1. a first-stage pressure reducing valve end cover; 2. a primary pressure reducing valve body; 3. a primary pressure reducing valve push rod; 4. a first O-shaped sealing ring of the primary pressure reducing valve; 5. a primary pressure reducing valve vent hole; 6. a primary pressure reducing valve spring; 7. a first-stage pressure reducing valve and a second O-shaped sealing ring; 8. a primary pressure reducing valve air inlet; 9. a secondary pressure reducing valve air inlet; 10. a first O-shaped sealing ring of the secondary pressure reducing valve; 11. a secondary pressure reducing valve seat; 12. a secondary pressure relief valve spring; 13. a second O-shaped sealing ring of the secondary pressure reducing valve; 14. a secondary pressure reducing valve push rod; 15. a secondary pressure reducing valve outlet pressure measuring port; 16. a secondary pressure reducing valve body; 17. an outlet of the secondary pressure reducing valve; 18. a plastic sealing gasket of an air inlet of the secondary pressure reducing valve; 19. a third O-shaped sealing ring of the secondary pressure reducing valve; 20. a secondary pressure reducing valve vent hole; 21. a safety valve of a secondary pressure reducing valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the invention: as shown in fig. 1, a high-pressure pneumatic pressure reducing valve for a hydrogen energy vehicle comprises a primary pressure reducing valve and a secondary pressure reducing valve, wherein the primary pressure reducing valve comprises a primary pressure reducing valve end cover 1, a primary pressure reducing valve body 2, a primary pressure reducing valve push rod 3, a primary pressure reducing valve first O-shaped sealing ring 4, a primary pressure reducing valve vent hole 5, a primary pressure reducing valve spring 6, a primary pressure reducing valve second O-shaped sealing ring 7 and a primary pressure reducing valve air inlet 8, the primary pressure reducing valve air inlet 8 and the primary pressure reducing valve end cover 1 are respectively connected with the lower end face and the upper end face of the primary pressure reducing valve body 2 through flanges, the primary pressure reducing valve push rod 3, the primary pressure reducing valve spring 6 and the primary pressure reducing valve body 2 are coaxially matched, the primary pressure reducing valve spring 6 is coaxially nested in the primary pressure reducing valve push rod 3, the upper end face of the primary pressure reducing valve push rod 3 is tightly attached to the lower end face of the primary pressure reducing valve end cover 1 under the action of the primary pressure reducing valve push rod 3, the primary pressure reducing valve push rod 3 is at an upper limit position, the lower end face of the primary pressure reducing valve push rod 3 and the primary pressure reducing valve body 8 form a throttling port a dense throttling opening a throttling port a A, the primary pressure reducing valve first O-type sealing ring 4 and the primary pressure reducing valve second O-shaped sealing ring 7 are nested in a side wall of the primary pressure reducing valve body 5.
In the specific operation, high-pressure hydrogen of 35MPa enters through an air inlet 8 of a primary pressure reducing valve and enters a throttling port A of the primary pressure reducing valve through an air passage of the air inlet 8 of the primary pressure reducing valve, the throttling port A is a throttling hole formed by a conical valve core at the front end of a push rod 3 of the primary pressure reducing valve and a valve seat at the upper end of the air inlet 8 of the primary pressure reducing valve, because the push rod of the primary pressure reducing valve is initially acted by a spring 6 of the primary pressure reducing valve, the upper end face of the push rod 3 of the primary pressure reducing valve is always tightly attached to the lower end face of an end cover 1 of the primary pressure reducing valve, the opening of the throttling port A of the primary pressure reducing valve is in the maximum state at the moment, the pressure loss of the high-pressure hydrogen entering through the air inlet 8 of the primary pressure reducing valve is less, and because a second O-shaped sealing ring 7 of the primary pressure reducing valve forms tight sealing, the high-pressure hydrogen passing through the throttling port A of the primary pressure reducing valve cannot flow into a spring cavity of the primary pressure reducing valve through a gap between the push rod 3 of the primary pressure reducing valve and a valve body 2 of the primary pressure reducing valve;
the high-pressure hydrogen passing through the orifice A of the primary pressure reducing valve can only enter a central hole of a push rod 3 of the primary pressure reducing valve through cylindrical pore canals on the periphery of the push rod 3 of the primary pressure reducing valve and enters a volume cavity (1) of the primary pressure reducing valve through the central hole of the push rod 3 of the primary pressure reducing valve and a slotted opening at the upper end of the push rod 3 of the primary pressure reducing valve, and the volume cavity (2) at the upper end surface of the push rod of the primary pressure reducing valve is isolated from a spring cavity of the primary pressure reducing valve and is not communicated with the spring cavity of the primary pressure reducing valve under the action of a first O-shaped sealing ring 4 of the primary pressure reducing valve;
the up-and-down movement of the first-stage pressure reducing valve push rod 3 is a dynamic adjusting process until the pressure of high-pressure hydrogen acting on the upper end face of the first-stage pressure reducing valve push rod 3 is balanced with the spring compression force of the first-stage pressure reducing valve spring 6, the pressure acting on the conical valve core of the lower end face of the first-stage pressure reducing valve and the friction force acting on the first-stage pressure reducing valve push rod 3, the first-stage pressure reducing valve push rod 3 can be stabilized at a certain fixed position, further the distance between the lower end face of the first-stage pressure reducing valve push rod 3 and the valve seat of the upper end face of the air inlet 8 of the first-stage pressure reducing valve is approximately fixed, the throttling action of the first-stage throttling hole A is fixed, so that the pressure of the hydrogen passing through the throttling hole A of the first-stage pressure reducing valve is approximately fixed and is finally stabilized at about 1.7-2 MPa.
The secondary pressure reducing valve comprises a secondary pressure reducing valve air inlet 9, a secondary pressure reducing valve first O-shaped sealing ring 10, a secondary pressure reducing valve seat 11, a secondary pressure reducing valve spring 12, a secondary pressure reducing valve second O-shaped sealing ring 13, a secondary pressure reducing valve push rod 14, a secondary pressure reducing valve outlet pressure measuring port 15, a secondary pressure reducing valve body 16, a secondary pressure reducing valve outlet 17, a secondary pressure reducing valve air inlet plastic sealing gasket 18, a secondary pressure reducing valve third O-shaped sealing ring 19, a secondary pressure reducing valve air inlet vent hole 20 and a secondary pressure reducing valve safety valve 21, wherein the secondary pressure reducing valve air inlet plastic sealing gasket 18 is embedded in the secondary pressure reducing valve air inlet 9, the secondary pressure reducing valve body 16 is connected with the secondary pressure reducing valve seat 11 through external threads, the secondary pressure reducing valve air inlet 9, the secondary pressure reducing valve seat 11 and the secondary pressure reducing valve push rod 14 are coaxially matched and connected to form a sliding pair, the sliding pair is axially coaxial with the secondary pressure reducing valve body 16, a throttle port B is formed by the left end face of the secondary pressure reducing valve push rod 14 and the secondary pressure reducing valve air inlet plastic sealing gasket 18, the secondary pressure reducing valve spring 12, the secondary pressure reducing valve seat 11 is coaxially embedded with the secondary pressure reducing valve push rod 14, the secondary pressure reducing valve seat 12 is located at the right limit position under the effect of the secondary pressure reducing valve spring 12, the secondary pressure reducing valve spring is tightly attached to the left end face of the secondary pressure reducing valve 16, the secondary pressure reducing valve 17 in a threaded form a secondary pressure reducing valve cavity, and the secondary pressure reducing valve cavity 20 is installed on the secondary pressure reducing valve 16.
In the specific operation, hydrogen acted by a primary pressure reducing valve in a high-pressure hydrogen two-stage pressure reducing valve flows into a secondary pressure reducing valve through an air passage at a throttling port A of the primary pressure reducing valve, because a first O-shaped sealing ring 10 of the secondary pressure reducing valve, a valve seat 11 of the secondary pressure reducing valve and a valve body 2 of the primary pressure reducing valve form compact sealing, an air inlet air passage of the secondary pressure reducing valve is isolated from the outside atmosphere, and the hydrogen is prevented from leaking, therefore, the hydrogen entering the secondary pressure reducing valve can only enter a main flow passage of the secondary pressure reducing valve through a circumferential air hole on an air inlet 9 of the secondary pressure reducing valve, and then passes through a throttling port consisting of a plastic sealing gasket 18 of the air inlet of the secondary pressure reducing valve and a push rod 14 of the secondary pressure reducing valve, because the push rod 14 of the initial secondary pressure reducing valve is under the action of the spring compression of a spring 12 of the secondary pressure reducing valve, the left end surface of the push rod 14 of the secondary pressure reducing valve is tightly attached to the left end surface of a valve body 16 of the secondary pressure reducing valve, the push rod 14 is at the right initial limit position, at the moment, the throttling port B of the secondary pressure reducing valve has the largest throttling area, namely the smallest throttling effect, and the pressure of the hydrogen flowing into the secondary pressure reducing valve is almost unchanged;
the hydrogen passing through the throttling port B of the secondary pressure reducing valve continuously flows forwards under the action of the pressure gradient of the hydrogen front and back, and when the hydrogen moves to the transition area of the push rod 14 of the secondary pressure reducing valve and the valve body 16 of the secondary pressure reducing valve, a gap exists between the push rod 14 of the secondary pressure reducing valve and the valve body 16 of the secondary pressure reducing valve, so that part of the gas directly flows out of the high-pressure hydrogen two-stage pressure reducing valve through the outlet 17 of the secondary pressure reducing valve; a part of the hydrogen gas flows into the volume chamber (2) of the secondary pressure reducing valve through a gap between the push rod (14) of the secondary pressure reducing valve and the valve body (16) of the secondary pressure reducing valve. Due to the existence of the second O-shaped sealing washer of the secondary pressure reducing valve, the second O-shaped sealing washer forms compact sealing with the push rod 14 of the secondary pressure reducing valve and the side wall of the valve body 16 of the secondary pressure reducing valve, so that a cavity of the spring 12 of the secondary pressure reducing valve and the volume cavity (2) of the secondary pressure reducing valve are isolated, and hydrogen in the volume cavity (2) of the secondary pressure reducing valve is prevented from leaking;
along with the increase of the volume of hydrogen in the volume cavity (2) of the secondary pressure reducing valve, the pressure of the hydrogen gradually increases and gradually reaches the pressure of hydrogen at the outlet of the throttle opening B of the secondary pressure reducing valve, under the action of the hydrogen pressure, the push rod 14 of the secondary pressure reducing valve overcomes the pre-compression force of the spring 12 of the secondary pressure reducing valve and moves leftwards, the spring 12 of the secondary pressure reducing valve is further compressed, meanwhile, the distance between the left end surface of the push rod 14 of the secondary pressure reducing valve and the plastic sealing gasket 18 of the air inlet of the secondary pressure reducing valve is shortened, namely, the throttle area of the throttle opening B of the secondary pressure reducing valve is reduced, the throttling function is increased, so that the pressure of the hydrogen flowing through the throttle opening B of the secondary pressure reducing valve is further reduced, when the hydrogen pressure that the right end face of second grade relief pressure valve push rod 14 received and the hydrogen pressure that the left end face of second grade relief pressure valve push rod 14 received, the second grade relief pressure valve third O type sealing washer 19 is balanced to the frictional force of second grade relief pressure valve push rod 14 and the compressive force of second grade relief pressure valve spring 12, second grade relief pressure valve push rod 14 can be stabilized in a certain position, make the throttle area of second grade relief pressure valve choke B also fixed, the hydrogen after the effect of second grade relief pressure valve promptly will export the stable pressure that hydrogen pressure is less than when getting into the second grade relief pressure valve, this application second grade relief pressure valve can stably output 0.6-1.3 MPa's hydrogen.
The throttling port A is composed of a first-stage pressure reducing valve push rod 3 and a first-stage pressure reducing valve air inlet 8, the first-stage pressure reducing valve push rod 3 is of a conical valve core structure, the material is made of plastics, collision between the first-stage pressure reducing valve push rod 3 and a first-stage pressure reducing valve body 2 is reduced, and the service life of the high-pressure hydrogen two-stage pressure reducing valve is prolonged.
The vent hole 5 of the first-stage pressure reducing valve enables a volume cavity where the spring 6 of the first-stage pressure reducing valve is located to be always communicated with the atmosphere when the push rod 3 of the first-stage pressure reducing valve conducts pressure adjustment, the air spring effect of the volume cavity of the spring 6 of the first-stage pressure reducing valve is avoided, the dynamic response characteristic of the first-stage pressure reducing valve is improved, and then hydrogen with stable pressure is output by a high-pressure hydrogen two-stage pressure reducing valve to be guaranteed.
The plastic sealing gasket 18 of the air inlet of the secondary pressure reducing valve is processed and manufactured by engineering plastics, so that when the push rod 14 of the secondary pressure reducing valve is in a pressure adjusting working condition, hard collision with the plastic sealing gasket 18 of the air inlet of the secondary pressure reducing valve is avoided, the collision strength is reduced, and the service lives of the plastic sealing gasket 18 of the air inlet of the secondary pressure reducing valve and the push rod 14 of the secondary pressure reducing valve are prolonged.
The secondary pressure reducing valve safety valve 21 is installed on the secondary pressure reducing valve air outlet section to limit the pressure of the secondary pressure reducing valve outlet 17, the pressure of the secondary pressure reducing valve outlet 17 is prevented from exceeding the requirement of the hydrogen internal combustion engine, hydrogen with stable pressure is provided for the hydrogen internal combustion engine, the output characteristic of the hydrogen internal combustion engine is improved, and meanwhile the service life of the hydrogen internal combustion engine is prolonged.
The secondary pressure reducing valve vent hole 20 enables a volume cavity where the secondary pressure reducing valve spring 12 is located to be always communicated with the atmosphere when the secondary pressure reducing valve push rod 14 conducts pressure adjustment, so that the air spring effect of the volume cavity of the secondary pressure reducing valve spring 12 is avoided, the dynamic response characteristic of the secondary pressure reducing valve is improved, and further, the guarantee is provided for the high-pressure hydrogen two-stage pressure reducing valve to output hydrogen with stable pressure.
In order to measure the pressure of the outlet 17 of the secondary pressure reducing valve conveniently and form intelligent control conveniently, a user can know the pressure of the hydrogen output by the high-pressure hydrogen two-stage pressure reducing valve in real time in the using process conveniently, the outlet pressure measuring port 15 of the secondary pressure reducing valve is arranged at the air outlet section of the secondary pressure reducing valve, the pressure of the hydrogen output by the high-pressure hydrogen two-stage pressure reducing valve can be known in real time through the outlet pressure measuring port 15 of the secondary pressure reducing valve, and the intelligent control is convenient to detect and realize.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides a high-pressure pneumatic relief pressure valve that hydrogen energy source car was used, includes one-level relief pressure valve and second grade relief pressure valve, its characterized in that: the primary pressure reducing valve consists of a primary pressure reducing valve end cover (1), a primary pressure reducing valve body (2), a primary pressure reducing valve push rod (3), a primary pressure reducing valve first O-shaped sealing ring (4), a primary pressure reducing valve exhaust hole (5), a primary pressure reducing valve spring (6), a primary pressure reducing valve second O-shaped sealing ring (7) and a primary pressure reducing valve air inlet (8), the air inlet (8) and the end cover (1) of the primary pressure reducing valve are respectively connected with the lower end surface and the upper end surface of the valve body (2) of the primary pressure reducing valve by flanges, the primary pressure reducing valve push rod (3) and the primary pressure reducing valve spring (6) are coaxially matched with the primary pressure reducing valve body (2), the primary pressure reducing valve spring (6) is coaxially nested in the primary pressure reducing valve push rod (3), the upper end surface of the primary pressure reducing valve push rod (3) is tightly attached to the lower end surface of the primary pressure reducing valve end cover (1) under the action of the primary pressure reducing valve spring (6), the lower end surface of the push rod (3) of the primary pressure reducing valve and the upper end surface of the air inlet (8) of the primary pressure reducing valve form a throttling opening A, the first O-shaped sealing ring (4) and the second O-shaped sealing ring (7) of the primary pressure reducing valve are both nested on the push rod (3) of the primary pressure reducing valve, forms a compact seal with the push rod (3) of the primary pressure reducing valve and the valve body (2) of the primary pressure reducing valve, the primary pressure reducing valve vent hole (5) is arranged on the side wall of the cavity of the primary pressure reducing valve spring (6).
2. The high-pressure pneumatic pressure reducing valve for the hydrogen-powered automobile as claimed in claim 1, wherein: the two-stage pressure reducing valve is characterized by comprising a two-stage pressure reducing valve air inlet (9), a first O-shaped sealing ring (10) of the two-stage pressure reducing valve, a two-stage pressure reducing valve seat (11), a two-stage pressure reducing valve spring (12), a second O-shaped sealing ring (13) of the two-stage pressure reducing valve, a second pressure reducing valve push rod (14), a two-stage pressure reducing valve outlet pressure measuring port (15), a two-stage pressure reducing valve body (16), a two-stage pressure reducing valve outlet (17), a two-stage pressure reducing valve air inlet plastic sealing gasket (18), a second pressure reducing valve third O-shaped sealing ring (19), a two-stage pressure reducing valve vent hole (20) and a two-stage pressure reducing valve safety valve (21), wherein the two-stage pressure reducing valve air inlet plastic sealing gasket (18) is embedded in the two-stage pressure reducing valve air inlet (9), the two-stage pressure reducing valve body (16) is connected with the two-stage pressure reducing valve push rod (14) in a coaxial matching manner to form a sliding pair, the two-stage pressure reducing valve air inlet (9) and the two-stage pressure reducing valve push rod (14) are coaxially connected with the two-reducing valve push rod (11) in a sliding pair manner, the left end face of the two-stage pressure reducing valve spring (12) and the two-stage pressure reducing valve seat are coaxially embedded in a two-reducing valve outlet of the two-stage pressure reducing valve (17) form a two-stage pressure reducing valve, and the two-stage pressure reducing valve seat (17) are connected with the two-reducing valve body (17) in a two-stage pressure reducing valve seat, and a secondary pressure reducing valve vent hole (20) is arranged on the side wall of the containing cavity where the secondary pressure reducing valve spring (12) is positioned.
3. The high-pressure pneumatic pressure reducing valve for the hydrogen-powered automobile as claimed in claim 2, wherein: the throttling port A is composed of a primary pressure reducing valve push rod (3) and a primary pressure reducing valve air inlet (8), the primary pressure reducing valve push rod (3) is of a conical valve core structure, and the material is made of plastics.
4. The high-pressure pneumatic pressure reducing valve for the hydrogen-powered automobile as claimed in claim 2, wherein: the primary pressure reducing valve vent hole (5) enables a volume cavity where the primary pressure reducing valve spring (6) is located to be always communicated with the atmosphere when the primary pressure reducing valve push rod (3) conducts pressure adjustment.
5. The high-pressure pneumatic pressure reducing valve for the hydrogen-powered automobile as claimed in claim 2, wherein: the plastic sealing gasket (18) of the air inlet of the secondary pressure reducing valve is made of engineering plastics.
6. The high-pressure pneumatic pressure reducing valve for the hydrogen-powered automobile as claimed in claim 2, wherein: and a secondary pressure reducing valve safety valve (21) is arranged at the air outlet section of the secondary pressure reducing valve.
7. The high-pressure pneumatic pressure reducing valve for the hydrogen-powered automobile as claimed in claim 1, wherein: the secondary pressure reducing valve vent hole 20 enables a volume cavity where a secondary pressure reducing valve spring (12) is located to be always communicated with the atmosphere when the pressure of a secondary pressure reducing valve push rod (14) is adjusted.
8. The high-pressure pneumatic pressure reducing valve for the hydrogen-powered automobile as claimed in claim 2, wherein: and the outlet section of the secondary pressure reducing valve is provided with a secondary pressure reducing valve outlet pressure measuring port (15).
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| CN202211652871.2A CN115823307A (en) | 2022-12-21 | 2022-12-21 | High-pressure pneumatic pressure reducing valve for hydrogen energy automobile |
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| CN202211652871.2A CN115823307A (en) | 2022-12-21 | 2022-12-21 | High-pressure pneumatic pressure reducing valve for hydrogen energy automobile |
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| CN202211652871.2A Pending CN115823307A (en) | 2022-12-21 | 2022-12-21 | High-pressure pneumatic pressure reducing valve for hydrogen energy automobile |
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| CN218064411U (en) * | 2022-06-06 | 2022-12-16 | 上海百图低温阀门有限公司 | High-pressure hydrogen pressure reducing valve group |
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Application publication date: 20230321 |