CN218064411U - High-pressure hydrogen pressure reducing valve group - Google Patents
High-pressure hydrogen pressure reducing valve group Download PDFInfo
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- CN218064411U CN218064411U CN202221384505.9U CN202221384505U CN218064411U CN 218064411 U CN218064411 U CN 218064411U CN 202221384505 U CN202221384505 U CN 202221384505U CN 218064411 U CN218064411 U CN 218064411U
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- 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
- Y02E60/50—Fuel cells
Abstract
The utility model relates to a valve field. A high-pressure hydrogen pressure reducing valve group comprises a flow guide channel of a valve body, a filtering component, an electromagnetic valve, a primary pressure reducing valve and a secondary pressure reducing valve which are sequentially connected from a main air inlet to a main air outlet; the primary pressure reducing valve comprises a primary valve seat, a primary valve clack and a primary spring, and a primary movable cavity of the valve body is divided into a first chamber, a second chamber and a third chamber which are sequentially and independently arranged along the sliding direction away from the primary valve seat through a first sliding sealing piece and a second sliding sealing piece; the second-stage movable cavity of the valve body is internally divided into a fourth cavity, a fifth cavity and a sixth cavity which are sequentially and independently arranged along the direction away from the sliding of the second-stage valve seat through a third sliding sealing piece and a fourth sliding sealing piece. The utility model discloses a miniaturized combination. Through the optimization of the structures of the first-stage pressure reducing valve and the second-stage pressure reducing valve, the stable effect of the output air pressure is ensured.
Description
Technical Field
The utility model relates to a valve field, concretely relates to pressure reducing valve group in fuel cell's hydrogen supply system.
Background
With the continuous development of fuel cell vehicles in China, the power of the galvanic pile is also continuously improved, and the requirements on the safety, stability, economy, maintainability and the like of the hydrogen supply system for the vehicles are higher and higher. In the existing hydrogen supply system, independent valves such as a filter valve, an electromagnetic valve, a pressure reducing valve, a pressure sensor, a safety valve, a manual valve and the like are connected through connecting pieces such as pipe joints and the like, so that stable hydrogen supply for converting high-pressure hydrogen into low-pressure hydrogen is realized, and the system pressure monitoring and automatic control are realized. In the product with the prior structure, the number of independent valves is 6, the number of pipe joints for connection is 13, the number of pipes is 8, and the number of leakage points is up to 30. Taken together, the existing structures have the following pain points:
1. the number of valves and pipe connectors is large, and the cost is high.
2. The arrangement of a plurality of installation joints and installation pipelines is complex in installation process, time-consuming and labor-consuming.
3. The installation involves more leakage points, and there are more risk factors that influence the stable operation of system.
4. The factors such as vibration under the automobile running environment also need be considered in the integral installation, need set up pipe clamp etc. and carry out the damping fixedly.
5. With the continuous increase of the power of the galvanic pile, the flow performance of the pressure reducing valve is gradually increased, and the output pressure under the dynamic pressure needs to be more stable. And also to prevent the outlet pressure from deviating due to the instability of the seal under static pressure.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a high-pressure hydrogen decompression valves has solved above-mentioned at least one technical problem.
The technical scheme of the utility model is that: a high-pressure hydrogen pressure-reducing valve group comprises a valve body, wherein a main air inlet and a main air outlet are formed in the valve body, and a flow guide channel for conducting the main air inlet and the main air outlet in a butt joint mode is formed in the valve body;
the primary pressure reducing valve comprises a primary valve seat, a primary valve clack and a primary spring, a primary movable cavity for the sliding of the primary valve clack is formed in the valve body, and the primary valve clack is connected with the valve body in a sliding mode through a first sliding sealing piece and a second sliding sealing piece;
the primary movable cavity is divided into a first cavity, a second cavity and a third cavity which are sequentially and independently arranged along the direction far away from the primary valve seat in a sliding manner through the first sliding sealing element and the second sliding sealing element;
the first chamber is positioned between the primary valve seat and the first sliding sealing element and is always communicated with an outlet of the primary pressure reducing valve;
the first-stage valve clack is provided with a first-stage flow guide hole for communicating a first chamber and a third chamber, and the first chamber is internally controlled to be communicated and disconnected with an inlet of a first-stage pressure reducing valve through the movement of the first-stage valve clack so as to control the on-off of a medium;
the second chamber is communicated with the atmosphere;
the first chamber is communicated with the third chamber through a first-stage diversion hole;
the primary spring is positioned between the primary valve clack and the valve body;
the secondary pressure reducing valve comprises a secondary valve seat, a secondary valve clack and a secondary spring, a secondary movable cavity for the sliding of the secondary valve clack is formed in the valve body, and the secondary valve clack is connected with the valve body in a sliding mode through a third sliding sealing piece and a fourth sliding sealing piece;
the secondary movable cavity is internally divided into a fourth cavity, a fifth cavity and a sixth cavity which are sequentially and independently arranged along the direction far away from the secondary valve seat in a sliding manner through the third sliding sealing piece and the fourth sliding sealing piece, the fourth cavity is always communicated with the inlet of the secondary pressure reducing valve, and the sixth cavity is always communicated with the outlet of the secondary pressure reducing valve;
the second-stage valve clack is provided with a second-stage flow guide hole for communicating the fourth cavity with the sixth cavity;
the connection and disconnection between the sixth chamber and the fourth chamber are controlled by the motion of the second-stage valve clack in the fourth chamber, and further the connection and disconnection between the outlet of the second-stage pressure reducing valve and the inlet of the second-stage pressure reducing valve are controlled;
the fifth chamber is communicated with the atmosphere;
the secondary spring is located between the secondary valve flap and the valve body.
The utility model discloses a combination of each valve has realized miniaturized combination. Through the optimization of one-level relief pressure valve and second grade relief pressure valve structure, the one-level relief pressure valve is used for the rapid decompression, and the second grade relief pressure valve is used for the steady voltage, has guaranteed the stable effect of output atmospheric pressure.
The moving direction of the first-stage valve clack is vertical to the moving direction of the second-stage valve clack.
And a first sliding sealing piece and a second sliding sealing piece are respectively arranged at two ends of the first-stage valve clack in the moving direction. The first-stage diversion hole and the inlet butt-joint section of the second-stage pressure reducing valve are positioned on the side of the first sliding sealing piece, which is adjacent to the first-stage valve clack sealing piece.
The fourth sliding seal is mounted on the secondary valve flap and the third sliding seal is mounted on the valve body.
Preferably, the first-stage valve seat is provided with an air inlet hole,
the end part of the primary valve flap, which is adjacent to the air inlet, is provided with a valve flap sealing element;
a primary sliding seal is mounted on the primary valve flap adjacent to the valve flap seal and the first annular protrusion, and the primary sliding seal is positioned between the primary valve flap and the valve body;
the cross section area of the first-stage valve clack where the second sliding sealing piece is installed is far larger than that of the air inlet hole. Preferably, the cross-sectional area of the primary valve flap where the second sliding seal is mounted is greater than 100 times the cross-sectional area of the intake orifice.
Thereby reducing the influence of the inlet pressure in the primary pressure reducing valve on the change of the outlet pressure. When the primary pressure reducing valve leaks, the pressure of the outlet is increased, the higher the sealing force is provided, the structure has an overpressure prevention structure until the sealing effect is achieved, and the stability of the pressure of the outlet is better.
Further preferably, the secondary valve flap comprises a hollow columnar structure, and an inner hole of the hollow columnar structure is used as a channel for butting an inlet and an outlet of the secondary pressure reducing valve;
the end part of the hollow columnar structure, which is adjacent to the air outlet, is provided with an extending part which extends outwards;
the extension portion and the valve body are slidably connected with the hollow columnar structure, and the secondary sliding sealing element is installed at the position of the hollow columnar structure.
Through the structure of optimizing the valve clack, through the hole of cavity column structure, be convenient for guarantee air current flux. Meanwhile, the valve body is connected with the hollow columnar structure in a sliding mode, the secondary sliding sealing piece is installed at the position of the hollow columnar structure, the control over the pressure area of the secondary valve clack is achieved, and the ground pressure stabilizing effect of the secondary valve clack is further achieved.
Further preferably, the effective area of the secondary flap acting on the fourth sliding seal with the medium in the sixth chamber is S6;
the effective area of the secondary valve flap acting on the third sliding seal with the medium in the fifth fourth cavity is S5;
so that when the secondary pressure relief valve is closed, the effective area of the medium in the fourth chamber acting on the secondary valve flap at the secondary valve seat is S4; the area relation satisfies that the S6 is far larger than the difference value between the S5 and the S4; preferably, S6 ≧ 100 (S5-S4).
The areas of the S5 and the S4 are close. It is preferable. The difference between S5 and S4 is less than 10% of S5.
Thereby realizing the control of the valve clack compression surface. The pressure-receiving surface at the secondary sliding sealing element is close to the pressure-receiving surface at the valve seat sealing element, and the influence of pressure fluctuation at the outlet of the primary pressure reducing valve is reduced.
The effective area is the projected area of the contact surface of the medium and the valve clack on a plane perpendicular to the movement direction of the valve clack.
Further preferably, a safety relief device and a manual drain valve are further mounted in the valve body;
the valve body is provided with a discharge port, and an area between the outlet of the secondary pressure reducing valve and the air outlet is communicated with the discharge port through at least one of a safety relief device and a manual discharge valve.
The functions of overpressure discharge and manual discharge are realized.
Preferably, the safety relief device and the manual discharge valve are both provided with an inlet and an outlet, and the inlets of the safety relief device and the manual discharge valve are in butt joint with the region between the outlet of the secondary pressure reducing valve and the air outlet;
the valve body is provided with a communication port which is butted with an outlet of the safety relief device and an outlet of the manual discharge valve;
and the outlet of the safety relief device and the outlet of the manual discharge valve are communicated with the discharge port.
Further preferably, the valve body comprises a first valve body, a second valve body and a third valve body;
the first valve body and the second valve body are detachably connected and spliced to form a cavity;
the first valve body is detachably connected with the third valve body positioned in the cavity;
the third valve body is connected with the second-stage valve clack in a sliding mode;
the third valve body is detachably connected with the second-stage valve seat.
The assembly is convenient.
Further preferably, a secondary valve flap seal is removably attached to the secondary valve seat.
Further preferably, the valve body further comprises a fourth valve body;
the first valve body is detachably connected with the fourth valve body;
the fourth valve body is provided with a sliding groove in sliding connection with the first-stage valve clack, and the end part of the sliding groove extends into the first valve body.
The assembly is convenient.
Preferably, the valve body is provided with a detection channel, and the detection channel is communicated with the air outlet;
and the detection channel is provided with a pressure sensor.
Further preferably, the primary spring is located in the second chamber;
the secondary spring is positioned in the fifth chamber;
and a water-blocking ventilation valve communicated with the second chamber and a water-blocking ventilation valve communicated with the fifth chamber are installed on the valve body.
Has the advantages that:
1) The filter is arranged at the high-pressure end of the inlet of the valve, so that the air inlet medium can be effectively filtered, and impurities are prevented from entering the subsequent interior to influence the service life of the sealing element;
2) The electromagnetic valve is designed at the high-pressure end, so that the flow can be effectively increased through a smaller drift diameter, and the effect of controlling a pressure output switch can be achieved;
3) Higher inlet pressure can be formed into certain pressure through decompression through designing one-level decompression, and simultaneously under the change of inlet pressure, the range of pressure change is reduced through one-level decompression cavity (third cavity), and final outlet pressure is formed through a secondary decompression valve, so that the stability of the outlet pressure is improved.
4) Through the cooperation of different forms of the first-stage pressure reduction and the second-stage pressure reduction and the design of each stress area, the influence of inlet pressure fluctuation on the outlet pressure is further reduced, and the stability of the outlet pressure is improved.
5) The first-stage decompression and the second-stage decompression both have overpressure prevention structures, and the stability of output pressure is prevented from being influenced by loss of sealing performance.
6) The structural design of the secondary decompression can greatly design the final flow channel of the secondary decompression, and the flow capacity of the valve is improved.
7) The safety relief device and the manual discharge valve are connected in parallel, so that the functions of overpressure discharge and manual discharge are realized.
8) Multiple functions are designed on one valve, so that the leakage point of the original system can be effectively reduced by more than 50%, and the leakage risk of a joint in a system pipeline is reduced;
9) The system volume is only the volume size of the pressure reducing valve group, so that the integration of the system pipeline is greatly improved, and the improvement direction of light weight and small volume of the system is met;
10 A large amount of joint pipe fittings and functional valve members in the pipeline are reduced, and the cost is effectively reduced by more than 50%.
Drawings
FIG. 1 is a sectional view of embodiment 1 of the present invention;
fig. 2 is a partial sectional view of a primary pressure reducing valve according to embodiment 1 of the present invention in an open state;
fig. 3 is a partial sectional view of a two-stage pressure reducing valve according to embodiment 1 of the present invention in an open state.
In the figure: 1 is an air inlet, 2 is a filter, 3 is an electromagnetic valve, 4 is a first-stage pressure reducing valve, 5 is a second-stage pressure reducing valve, 6 is an air outlet, 7 is a safety relief device, 8 is a manual discharge valve, 9 is a discharge outlet, 10 is a pressure sensor, a is a high pressure cavity, b is a first-stage pressure reducing cavity, c is a first-stage spring cavity, d is a second-stage pressure reducing cavity, e is a second-stage spring cavity, f is a low pressure cavity, h is a discharge cavity, 4-1 is a first valve body, 4-2 is a first-stage valve seat, 4-3 is a first-stage valve flap, 4-4 is a first sliding seal, 4-5 is a first-stage spring, 4-6 is a second sliding seal, 4-7 is a second-stage valve flap seal, 5-1 is a second-stage valve seat, 5-2 is a valve seat seal, 5-3 is a fourth sliding seal, 5-4 is a second-stage spring, 5-5 is a fifth sliding seal, and 5-6 is a second-stage valve flap.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 3, in embodiment 1, a high-pressure hydrogen pressure reducing valve set includes a valve body, an air inlet 1 and an air outlet 6 are provided on the valve body, a flow guide channel for connecting the air inlet 1 and the air outlet 6 is provided on the valve body, and the flow guide channel sequentially passes through a filter assembly 2, an electromagnetic valve 3, a primary pressure reducing valve 4, and a secondary pressure reducing valve 5 from the air inlet 1 to the air outlet 6.
And the valve body is provided with a low-pressure cavity f butted with the gas outlet, and the low-pressure cavity f is positioned between the gas outlet and the outlet of the secondary pressure reducing valve.
The primary pressure reducing valve comprises a primary valve seat 4-2, a primary valve clack 4-3 and a primary spring 4-5, a primary movable cavity for the sliding of the primary valve clack 4-3 is formed in the valve body, and the primary valve clack 4-3 is connected with the valve body in a sliding mode through a first sliding sealing piece 4-4 and a second sliding sealing piece 4-6; the primary movable cavity is divided into a first cavity, a second cavity and a third cavity which are sequentially and independently arranged along the sliding direction away from the primary valve seat 4-2 by a first sliding sealing element 4-4 and a second sliding sealing element 4-6; the first chamber is positioned between the primary valve seat 4-2 and the first sliding sealing element 4-4 and is always communicated with an outlet of the primary pressure reducing valve; the first-stage valve clack 4-3 is provided with a first-stage flow guide hole for communicating the first chamber with the third chamber, and the first chamber is controlled to be communicated with and disconnected from the inlet of the first-stage pressure reducing valve through the movement of the first-stage valve clack 4-3, so that the on-off of a medium is controlled; the second chamber is communicated with the atmosphere; the first chamber is communicated with the third chamber through a first-stage diversion hole; the primary spring 4-5 is positioned between the primary valve clack 4-3 and the valve body.
The primary spring is preferably located in the second chamber as a primary spring chamber c. The first-stage valve clack is positioned on the side of the first annular protrusion, which is far away from the first valve seat, and encloses a first-stage decompression cavity with the valve body. An air inlet is arranged on the first-stage valve seat 4-2, and a valve flap sealing element 4-7 is arranged at the end part of the first-stage valve flap 4-3 adjacent to the air inlet 1. The first-stage sliding sealing element is arranged at the position of the first-stage valve flap 4-3, which is adjacent to the valve flap sealing element 4-7, and the annular bulge; the cross-sectional area of the annular projection of the primary valve flap 4-3 where the primary sliding seal is mounted is 10 times larger than the cross-sectional area of the intake port.
The inlet pressure of the primary pressure reducing valve 4 is P, the pressure after primary pressure reduction is P1, and the pressure after secondary pressure reduction is P2.
Primary pressure reduction principle of the primary pressure reduction valve 4: the medium pressure enters the first-stage decompression chamber b from the high-pressure chamber a through the valve seat 4-2, and the first-stage valve clack 4-3 is opened and closed under the action of the pressure P1 to stabilize the pressure of the first-stage decompression chamber b.
The method specifically comprises the following steps: the valve clack 4-3 is provided with a valve clack sealing element 4-7, a first sliding sealing element 4-4 and a second sliding sealing element 4-6, the effective stress areas (the projection of the area of the pressure of a medium acting on the valve clack in the motion direction of the valve clack) of the corresponding positions are S1, S2 and S3, and the stress conditions of the valve clack are respectively converted into the following stress conditions under the action of the pressure of the medium:
force at flap seal 4-7: f1= (P-P1) × S1, force direction down, (present when valve is closed, otherwise absent);
force at first sliding seal 4-4: f2= P1 × S2, force direction is downward;
force at second sliding seal 4-6: f3= P1 × S3, with the force direction facing upwards;
spring force F of primary spring 4-5 Bullet 1 (designed fixed value), the stress direction is downward, and the friction force is small and neglected in the whole force;
sealing force F of first-stage valve flap 4-3 Secret key (generally, the design value is small as determined by the design), and the stress direction is upward;
when P1 reaches the design pressure, the first-stage valve clack 4-3 is close to the first-stage valve seat 4-2 to do work, the valve clack sealing piece 4-7 is attached to the first-stage valve seat 4-2, the closing of the first-stage pressure reducing valve 4 is realized, and the specific stress relation is as follows:
F3-F2-F1＝P1*S3-P1*S2-(P-P1)*S1＝P1*(S3-S2+S1)-P*S1＝F bullet 1 +F Secret key ；
And (3) deriving: p1 (S3-S2 + S1) = F Bullet 1 +F Secret key +P*S1；
When the pressure P1 does not reach the design pressure, the first-stage valve clack 4-3 is opened under the action of the first-stage spring 4-5, and pressure output is continuously carried out; when in design, the area S1 is far smaller than the area S3, so that the influence of the inlet pressure in the first-stage pressure reducing valve 4 on the change of the outlet pressure is reduced. When the primary pressure reducing valve 4 leaks, the pressure of the outlet is increased, the higher the sealing force is provided, the structure has an overpressure prevention structure until the sealing effect is achieved, and the stability of the pressure of the outlet is better.
The secondary pressure reducing valve comprises a secondary valve seat 5-1, a secondary valve clack 5-6 and a secondary spring 5-4, a secondary movable cavity for the sliding of the secondary valve clack 5-6 is formed in the valve body, and the secondary valve clack 5-6 is connected with the valve body in a sliding mode through a third sliding sealing piece 5-3 and a fourth sliding sealing piece 5-5; the secondary movable cavity is divided into a fourth cavity, a fifth cavity and a sixth cavity which are sequentially and independently arranged along the direction far away from the secondary valve seat 5-1 in a sliding mode through a third sliding sealing element 5-3 and a fourth sliding sealing element 5-5, the fourth cavity is always communicated with an inlet of the secondary pressure reducing valve, and the sixth cavity is always communicated with an outlet of the secondary pressure reducing valve; a second-stage flow guide hole for communicating the fourth cavity and the sixth cavity is formed in the second-stage valve clack 5-6; the connection and disconnection between the sixth chamber and the fourth chamber are controlled by the movement of the second-stage valve clack 5-6 in the fourth chamber, and further the connection and disconnection between the outlet of the second-stage pressure reducing valve and the inlet of the second-stage pressure reducing valve are controlled; the fifth chamber is communicated with the atmosphere; the secondary spring is positioned between the secondary valve clacks 5-6 and the valve body. The second-stage spring is located in the fifth chamber and serves as a second-stage spring chamber e.
The second-stage valve clack 5-6 comprises a hollow columnar structure, and an inner hole of the hollow columnar structure is used as a second-stage flow guide hole; the end part of the hollow columnar structure adjacent to the air outlet 6 is provided with a second annular protrusion extending outwards; and a third sliding sealing piece and a fourth sliding sealing piece are arranged at the position where the second annular protrusion and the valve body are in sliding connection with the hollow cylindrical structure. Through the structure of optimizing the valve clack, through the hole of cavity column structure, be convenient for guarantee air current flux. Meanwhile, a second-stage sliding sealing element is arranged at the position of the valve body in sliding connection with the hollow columnar structure, so that the control of the pressure bearing area of the second-stage valve clack 5-6 is realized, and further, the pressure stabilizing effect of the second-stage valve clack 5-6 is realized.
The two-stage pressure reduction principle of the two-stage pressure reduction valve 5 is as follows: the medium pressure passes through the secondary valve clack 5-6 from the primary decompression cavity b (namely, the third cavity) and continuously enters the secondary decompression cavity d (namely, the sixth cavity), and the secondary valve clack 5-6 is opened and closed under the action of the pressure P2 to stabilize the pressure of the secondary decompression cavity d (namely, the sixth cavity);
the method specifically comprises the following steps: the effective stress areas of the valve seat sealing part 5-2, the third sliding sealing part 5-3 and the fourth sliding sealing part 5-5 corresponding to the positions are S4, S5 and S6 respectively, and under the action of a medium, the stress conditions which are converted into the valve clacks respectively are as follows:
the stress at the valve seat sealing part 5-2 is as follows: f4= (P1-P2) × S4, force directed to the right (present when valve is closed, otherwise not present),
the force at the third sliding seal 5-3 is: f5= P1S 5, the force direction is towards the left,
the force at the fourth sliding seal 5-5 is: f6= P2 × S6, force direction towards right;
spring force F of secondary spring 5-4 Bullet 2 (a fixed value is designed), the stress direction faces to the left, and the friction force is small and neglected in the whole stress;
valve flap sealing force F Secret key (determined by design, the general design value is small), and the stress direction faces to the left;
when P2 reaches a design value, the secondary valve clack 5-6 works close to the secondary valve seat 5-1, the secondary valve clack 5-6 is attached to a sealing element of the secondary valve seat 5-1, the secondary pressure reducing valve 5 is closed, and the specific stress relation is as follows:
F4+F6＝F bullet 2 +F5；
(P1-P2)*S4+P2*S6＝F Bullet 2 +P1*S5+F Secret key ；
P2*(S6-S4)-P1(S5-S4)＝F Bullet 2+ F Secret key ；
When P1 does not reach the design pressure, the valve clack is opened under the action of the spring, and pressure output is continuously carried out; from this relational expression, it is found that the more stable the P1 pressure is, the more stable the P2 pressure is, and that the areas of S5 and S4 are close to each other at the time of design, and the difference is small. It is preferred. The difference between S5 and S4 is less than 10% of S5. The area relation satisfies that the S6 is far larger than the difference value between the S5 and the S4; preferably, S6 ≧ 100 (S5-S4).
The influence of P1 pressure fluctuation on P2 is further reduced, and the increase of P2 value due to leakage also increases more sealing force F Secret key The better the flow channel seal. And the flow passageThe increase of the area can effectively improve the flow capacity without influencing the stability of the output pressure P2.
A safety relief device 7 and a manual drain valve 8 are also arranged in the valve body; the valve body is provided with a discharge port 9, and the area between the outlet of the secondary pressure reducing valve 5 and the air outlet 6 is communicated with the discharge port 9 through at least one of a safety relief device 7 and a manual discharge valve 8. The functions of overpressure discharge and manual discharge are realized. The safety relief device 7 and the manual drain valve 8 are respectively provided with an inlet and an outlet, and the inlets of the safety relief device 7 and the manual drain valve 8 are butted with a region between the outlet of the secondary pressure reducing valve 5 and the air outlet 6; a communicating port which is butted with an outlet of the safety relief device 7 and an outlet of the manual discharge valve 8 is formed in the valve body; the outlet of the safety relief 7 and the outlet of the manual drain valve 8 are both in communication with a drain port 9.
And a cavity discharge h butted with the discharge port 9 is formed in the valve body and is positioned between the discharge port 9 and an outlet of the manual discharge valve 8.
The valve body comprises a first valve body 4-1, a second valve body and a third valve body; the first valve body and the second valve body are detachably connected and spliced to form a cavity; the first valve body 4-1 is detachably connected with a third valve body positioned in the cavity; the third valve body is connected with the second-stage valve clack 5-6 in a sliding way; the third valve body is detachably connected with a second-stage valve seat 5-1. The assembly is convenient. The secondary valve seat 5-1 is detachably connected with a secondary valve clack 5-6 sealing element 4-7. The valve body also comprises a fourth valve body; the first valve body is detachably connected with the fourth valve body; the fourth valve body is provided with a sliding groove which is connected with the first-stage valve clack 4-3 in a sliding mode, and the end portion of the sliding groove extends into the first valve body. The assembly is convenient.
A detection channel is formed in the valve body and communicated with the air outlet 6; the detection channel is provided with a pressure sensor 10.
And a water-blocking vent valve communicated with the primary spring cavity c and a water-blocking vent valve communicated with the secondary spring cavity e are arranged on the valve body.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A high-pressure hydrogen pressure-reducing valve group comprises a valve body, wherein a main air inlet and a main air outlet are formed in the valve body, and a flow guide channel for conducting the main air inlet and the main air outlet in a butt joint mode is formed in the valve body;
the primary pressure reducing valve comprises a primary valve seat, a primary valve clack and a primary spring, a primary movable cavity for the sliding of the primary valve clack is formed in the valve body, and the primary valve clack is connected with the valve body in a sliding mode through a first sliding sealing piece and a second sliding sealing piece;
the primary movable cavity is divided into a first cavity, a second cavity and a third cavity which are sequentially and independently arranged along the direction far away from the primary valve seat in a sliding manner through the first sliding sealing element and the second sliding sealing element;
the first chamber is positioned between the primary valve seat and the first sliding sealing element and is always communicated with the outlet of the primary pressure reducing valve;
the first-stage valve clack is provided with a first-stage flow guide hole for communicating a first chamber with a third chamber, and the first chamber is controlled to be communicated with and disconnected from an inlet of a first-stage pressure reducing valve through the movement of the first-stage valve clack, so that the on-off of a medium is controlled;
the second chamber is communicated with the atmosphere;
the first chamber is communicated with the third chamber through a first-stage flow guide hole;
the primary spring is positioned between the primary valve clack and the valve body;
the secondary pressure reducing valve comprises a secondary valve seat, a secondary valve clack and a secondary spring, a secondary movable cavity for the sliding of the secondary valve clack is formed in the valve body, and the secondary valve clack is connected with the valve body in a sliding mode through a third sliding sealing piece and a fourth sliding sealing piece;
the secondary movable cavity is internally divided into a fourth cavity, a fifth cavity and a sixth cavity which are sequentially and independently arranged along the direction far away from the secondary valve seat in a sliding manner through the third sliding sealing piece and the fourth sliding sealing piece, the fourth cavity is always communicated with the inlet of the secondary pressure reducing valve, and the sixth cavity is always communicated with the outlet of the secondary pressure reducing valve;
the second-stage valve clack is provided with a second-stage flow guide hole for communicating the fourth cavity with the sixth cavity;
the connection and disconnection between the sixth chamber and the fourth chamber are controlled by the motion of the second-stage valve clack in the fourth chamber, and further the connection and disconnection between the outlet of the second-stage pressure reducing valve and the inlet of the second-stage pressure reducing valve are controlled;
the fifth chamber is communicated with the atmosphere;
the secondary spring is located between the secondary valve flap and the valve body.
2. A high pressure hydrogen pressure relief valve pack as claimed in claim 1, wherein: an air inlet hole is arranged on the first-stage valve seat,
the end part of the primary valve flap, which is adjacent to the main air inlet, is provided with a valve flap sealing element;
the end part, far away from the main air inlet, of the primary valve flap is provided with a first annular protrusion, and the first sliding sealing piece and the second sliding sealing piece are respectively arranged at the position, close to the valve flap sealing piece, of the primary valve flap and at the position, far away from the main air inlet, of the first annular protrusion;
the cross section area of the first-stage valve clack where the second sliding sealing piece is installed is 100 times larger than that of the air inlet hole.
3. A high pressure hydrogen pressure relief valve pack as claimed in claim 1, wherein: the second-stage valve clack comprises a hollow columnar structure, and an inner hole of the hollow columnar structure is used as the second-stage flow guide hole;
the end part of the hollow columnar structure, which is adjacent to the main air outlet, is provided with a second annular protrusion extending outwards;
the second annular protrusion and the valve body are slidably connected with the hollow cylindrical structure, and the third sliding sealing piece and the fourth sliding sealing piece are mounted at the positions of the hollow cylindrical structure respectively.
4. A high pressure hydrogen pressure relief valve pack as claimed in claim 3, wherein: the effective area of the secondary valve flap acting on the fourth sliding seal by the medium in the sixth cavity is S6;
the effective area of the secondary flap at the third sliding seal with the medium in the fourth chamber is S5;
so that when the secondary pressure reducing valve is closed, the effective area of the medium in the fourth chamber acting on the secondary valve clack at the secondary valve seat is S4;
S6≥100*(S5-S4)。
5. a high-pressure hydrogen pressure relief valve pack as claimed in claim 4, wherein: the difference between S5 and S4 is less than 10% of S5.
6. A high pressure hydrogen pressure relief valve pack as claimed in claim 1, wherein: the valve body comprises a first valve body, a second valve body and a third valve body;
the first valve body and the second valve body are detachably connected and spliced to form a cavity;
the first valve body is detachably connected with the third valve body positioned in the cavity;
the third valve body is connected with the second-stage valve clack in a sliding mode;
the third valve body is detachably connected with the secondary valve seat.
7. A high-pressure hydrogen pressure relief valve block as claimed in claim 6, wherein: the valve body further comprises a fourth valve body;
the first valve body is detachably connected with the fourth valve body;
the fourth valve body is provided with a sliding groove in sliding connection with the first-stage valve clack, and the end part of the sliding groove extends into the first valve body.
8. A high pressure hydrogen pressure relief valve pack as claimed in claim 1, wherein: the valve body is provided with a detection channel which is communicated with the air outlet;
and the detection channel is provided with a pressure sensor.
9. A high pressure hydrogen pressure relief valve pack as claimed in claim 1, wherein: the primary spring is positioned in the second chamber;
the secondary spring is located within the fifth chamber.
10. A high-pressure hydrogen pressure relief valve block as claimed in claim 1, wherein: and a water-blocking ventilation valve communicated with the second chamber and a water-blocking ventilation valve communicated with the fifth chamber are installed on the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221384505.9U CN218064411U (en) | 2022-06-06 | 2022-06-06 | High-pressure hydrogen pressure reducing valve group |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221384505.9U CN218064411U (en) | 2022-06-06 | 2022-06-06 | High-pressure hydrogen pressure reducing valve group |
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| Publication Number | Publication Date |
|---|---|
| CN218064411U true CN218064411U (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221384505.9U Active CN218064411U (en) | 2022-06-06 | 2022-06-06 | High-pressure hydrogen pressure reducing valve group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115823307A (en) * | 2022-12-21 | 2023-03-21 | 无锡出新液压成套设备有限公司 | High-pressure pneumatic pressure reducing valve for hydrogen energy automobile |
-
2022
- 2022-06-06 CN CN202221384505.9U patent/CN218064411U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115823307A (en) * | 2022-12-21 | 2023-03-21 | 无锡出新液压成套设备有限公司 | High-pressure pneumatic pressure reducing valve for hydrogen energy automobile |
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