CN214119065U - Medium-pressure hydrogen safety relief valve - Google Patents
Medium-pressure hydrogen safety relief valve Download PDFInfo
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- CN214119065U CN214119065U CN202022769330.0U CN202022769330U CN214119065U CN 214119065 U CN214119065 U CN 214119065U CN 202022769330 U CN202022769330 U CN 202022769330U CN 214119065 U CN214119065 U CN 214119065U
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Abstract
The utility model belongs to the technical field of valves, and discloses a medium-pressure hydrogen safety relief valve, which comprises a safety valve body and a sleeve nut connected with the safety valve body; a valve hole is formed in the safety valve body, and a front clamping sleeve and a rear clamping sleeve are arranged in the clamping sleeve nut; one end of the cutting sleeve nut close to the safety valve body is connected with a communicating pipe; a valve hole is arranged in the safety valve body, and the safety valve body, the adjusting screw and the safety valve exhaust joint body are sequentially connected to one end close to the clamping sleeve nut; the communicating pipe sequentially penetrates through the safety valve exhaust joint body, the adjusting screw and the safety valve core; the safety valve exhaust joint body is provided with a bulge which extends outwards in the radial direction. The utility model discloses can effectively prevent hydrogen leakage.
Description
Technical Field
The utility model belongs to the technical field of the valve, a medium pressure hydrogen safety relief valve is related to.
Background
A valve is a device used for controlling the on-off of fluid. Common valves include water and gas valves. Compared with water valves, gas valves have higher requirements for their safety, because typical gas valves are used for the control of combustible gases such as hydrogen, natural gas, etc.
The hydrogen gas may be a medium pressure hydrogen valve, a high pressure hydrogen valve, etc. according to the pressure of the delivery pipeline. The existing medium-pressure hydrogen valve is a common gas valve and comprises a valve body and a valve core arranged in the valve body, wherein the valve core is connected with a communicating pipe, and the end part of the communicating pipe is connected with an end cap used for fixing the valve core.
The existing hydrogen valve has no structure specially aiming at preventing the hydrogen from leaking or increasing the safety of the valve.
SUMMERY OF THE UTILITY MODEL
The utility model discloses it is being anticipated that the current poor problem of valve gas tightness is being solved.
In order to solve the above problems, the following solutions are provided:
the medium-pressure hydrogen safety relief valve in the scheme comprises a safety valve body and a clamping sleeve nut connected with the safety valve body; a front clamping sleeve and a rear clamping sleeve are arranged in the clamping sleeve nut; one end of the cutting sleeve nut close to the safety valve body is connected by threads; a valve hole is arranged in the safety valve body, and the safety valve body, the safety valve core, the adjusting screw and the safety valve exhaust joint body are sequentially connected to one end close to the clamping sleeve nut; the safety valve exhaust joint body is provided with a bulge which extends outwards in the radial direction.
The scheme has the advantages that:
through set up relief valve exhaust joint body, adjusting screw and relief valve case in the valve body, can make case part and valve body be connected more closely, increase the gas tightness of valve.
Further, a pressure regulating spring is connected between the safety valve spool and the adjusting screw, and a locking spring is connected between the adjusting screw and the safety valve exhaust connector body.
The relative position of each part is adjusted to play a role in adjusting the set pressure.
Further, the pressure regulating spring and the releasing spring are sleeved on the communicating pipe.
The installation and the deformation of the spring are convenient.
Further, one end of the safety valve core, which is far away from the clamping sleeve nut, is connected with a second sealing ring; the safety valve exhaust joint body is externally sleeved with a first sealing ring.
Through two sealing rings, increase the gas tightness.
Further, the first sealing ring and the second sealing ring are both in contact with the inner wall of the safety valve body.
Preventing hydrogen leakage.
Furthermore, internal threads are arranged in the safety valve body, and the adjusting screw and the safety valve exhaust joint body are both in threaded connection with the safety valve body.
The adjusting screw and the safety valve exhaust joint body are in threaded connection with the safety valve body, so that the valve core can be connected with the valve body more tightly.
Furthermore, the end part of the safety valve body close to the ferrule nut is provided with a mounting connection thread.
The end part is convenient to process.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the safety valve comprises a clamping sleeve nut 1, a rear clamping sleeve 2, a front clamping sleeve 3, a safety valve exhaust connector body 4, a sealing ring 5, a locking spring 6, an adjusting screw 7, a pressure regulating spring 8, a safety valve spool 9, a safety valve body 10 and a sealing ring 11.
The embodiment is basically as shown in the attached figure 1: the utility model discloses a medium-pressure hydrogen safety relief valve, which comprises a safety valve body, wherein a valve hole is communicated on the safety valve body; a safety valve spool, an adjusting screw and a safety valve exhaust joint body are sequentially arranged in the valve hole from left to right, and a communicating pipe penetrates through the safety valve exhaust joint body, the adjusting screw and the safety valve spool from right to left. And the left end of the safety valve core is sleeved with a second sealing ring. A pressure regulating spring is connected between the right end of the valve core of the safety valve and the left end of the adjusting screw, and a locking spring is connected between the adjusting screw and the exhaust joint body of the safety valve. A first sealing ring is arranged on the outer side of the air valve exhaust joint.
The right end of the communicating pipe is connected with a clamping sleeve nut, and a front clamping sleeve and a rear clamping sleeve are arranged on the left and right sides in the clamping sleeve nut.
After being decompressed by a high-pressure reducing regulator in the system, the hydrogen flows through a three-way joint and enters a downstream pipeline system, and meanwhile, a high-pressure steel pipe is connected with a medium-pressure hydrogen safety valve (hereinafter referred to as a safety valve) of the three-way joint. When the pressure of the gas entering the safety valve is larger than the pressure value set by the spring (the value can be adjusted by the spring), the gas passage in the safety valve is opened under the action of the gas pressure, the gas is discharged from the safety valve, and when the pressure drops below the set pressure value, the valve core in the safety valve closes the gas passage.
The hydrogen enters a downstream pipeline system after being decompressed by a high-pressure decompression regulator in the system, and is directly connected to a reserved interface of the high-pressure decompression regulator through threads on the left side of a safety valve. When the pressure of the gas entering the safety valve is larger than the pressure value set by the spring (the value can be adjusted by the spring), the gas passage in the safety valve is opened under the action of the gas pressure, the gas is discharged from the safety valve, and when the pressure drops below the set pressure value, the valve core in the safety valve closes the gas passage.
After being decompressed by a high-pressure decompression regulator in the system, the hydrogen enters a downstream pipeline system and is directly connected to a reserved interface of the high-pressure decompression regulator through threads on the left side of the safety valve body 10. When the pressure in the system is lower than the set pressure, the sealing ring 11 on the safety valve core 9 is tightly attached to the sealing surface on the safety valve body 10 under the action of the pressure regulating spring 8, and the gas is sealed in the system. When the pressure in the system is higher than the set pressure, the safety valve spool 9 overcomes the elasticity of the pressure regulating spring 8 to move towards the right direction under the pressure action of the gas in the system, a gas passage is opened, the gas enters the adjusting screw 7 and the safety valve exhaust connector body 4, and is connected with the high-pressure steel pipe through the ferrule nut 1, the rear ferrule 2 and the front ferrule 3, so that the gas which needs to be discharged due to overhigh pressure is discharged to a safe region. The safety valve take-off set pressure value can be adjusted through the adjusting screw 7, the adjusting screw is adjusted clockwise, the set pressure value is increased, and the set pressure value is reduced after the counter-clockwise adjustment. When the set value is adjusted to the required value, the adjusting screw 7 is prevented from loosening through the elastic force of the anti-loosening spring 6 and the safety valve exhaust joint body 4. The packing 5 prevents gas from leaking from the junction of the relief valve body 10 and the relief valve nipple body 4. Meanwhile, the connecting thread on the left side of the graphic representation of the safety valve body can be subjected to customized adaptive design on threads on different products according to connection, and the actual connection requirements of different products are met.
The sealing ring is sealed by an O-shaped ring made of hydrogenated nitrile rubber which is corrosion-resistant, high-low temperature resistant, high pressure resistant and hydrogen resistant. The connection of the steel pipe and the safety valve joint body adopts a double-clamping sleeve mode, and has the characteristics of good sealing, good shock resistance, strong pressure resistance and the like.
The hydrogen medium-pressure safety relief valve in the embodiment is used for a pipeline system of a hydrogen fuel electric vehicle, and prevents components in the system from being damaged due to overhigh pressure in the system. Compared with the traditional scheme, the method has the following advantages:
the traditional system has 9 leak points (1 leak point of pressure reducing regulator end cap, 3 leak points of three way connection, relief valve have 5 leak points), and adopts my new scheme then to have 4 leak points, and the leak point reduces 5, has greatly strengthened the security of system.
The traditional solution requires the addition of a three-way junction to the system, while the new solution can be installed directly on the pressure reducing regulator. The workload of installation can be reduced, and the working efficiency is improved.
The traditional scheme adopts steel pipe connection, the new scheme adopts screw thread and pressure reducing regulator direct connection, and can adapt to different screw thread models according to different pressure reducing regulator interfaces.
The novel scheme is provided with a locking device, namely a locking spring, so that the change of set pressure caused by the looseness of an adjusting screw due to vibration and the like is prevented, and the design is not provided in the traditional scheme.
The metal material is 316 material suitable for hydrogen.
The sealing materials are all made of hydrogenated nitrile rubber which is suitable for hydrogen and has high and low temperature resistance, high pressure resistance and corrosion resistance.
Example two
In this embodiment, the end of the safety valve body close to the ferrule nut is provided with an installation cavity, and a magnet is embedded in the safety cavity. The safety valve exhaust joint body is more tightly connected with the safety valve body through the adsorption of the magnet on the safety valve exhaust joint body.
The above description is only for the embodiments of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art will know all the common technical knowledge in the technical field of the present invention before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the schemes, and some typical known structures or known methods should not become obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (8)
1. The utility model provides a medium pressure hydrogen safety relief valve which characterized in that: comprises a safety valve body and a clamping sleeve nut connected with the safety valve body; a front clamping sleeve and a rear clamping sleeve are arranged in the clamping sleeve nut; one end of the cutting sleeve nut close to the safety valve body is connected by threads; a valve hole is arranged in the safety valve body, and the safety valve body, the safety valve core, the adjusting screw and the safety valve exhaust joint body are sequentially connected to one end close to the clamping sleeve nut; the safety valve exhaust joint body is provided with a bulge which extends outwards in the radial direction.
2. The medium-pressure hydrogen safety relief valve according to claim 1, characterized in that: the communicating pipe is sleeved with a plurality of spiral springs.
3. The medium-pressure hydrogen safety relief valve according to claim 2, characterized in that: a pressure regulating spring is connected between the safety valve core and the adjusting screw, and an anti-loosening spring is connected between the adjusting screw and the safety valve exhaust connector body.
4. The medium-pressure hydrogen safety relief valve according to claim 3, characterized in that: the pressure regulating spring and the releasing spring are both sleeved on the communicating pipe.
5. The medium-pressure hydrogen safety relief valve according to claim 1, characterized in that: one end of the safety valve core, which is far away from the clamping sleeve nut, is connected with a second sealing ring; the safety valve exhaust joint body is externally sleeved with a first sealing ring.
6. The medium-pressure hydrogen safety relief valve according to claim 5, characterized in that: the first sealing ring and the second sealing ring are both in contact with the inner wall of the safety valve body.
7. The medium-pressure hydrogen safety relief valve according to claim 1, characterized in that: the safety valve is characterized in that internal threads are arranged in the safety valve body, and the adjusting screw and the safety valve exhaust connector body are in threaded connection with the safety valve body.
8. The medium-pressure hydrogen safety relief valve according to claim 1, characterized in that: and the end part of the safety valve body close to the ferrule nut is provided with a mounting connection thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022769330.0U CN214119065U (en) | 2020-11-25 | 2020-11-25 | Medium-pressure hydrogen safety relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022769330.0U CN214119065U (en) | 2020-11-25 | 2020-11-25 | Medium-pressure hydrogen safety relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214119065U true CN214119065U (en) | 2021-09-03 |
Family
ID=77507170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022769330.0U Active CN214119065U (en) | 2020-11-25 | 2020-11-25 | Medium-pressure hydrogen safety relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214119065U (en) |
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2020
- 2020-11-25 CN CN202022769330.0U patent/CN214119065U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221230 Address after: No. 136, Pingtang East Road, Puxing Street (new material industry functional zone), Xinjin District, Chengdu, Sichuan 611430 Patentee after: SINOMA SCIENCE & TECHNOLOGY (CHENGDU) CO.,LTD. Address before: No. 320, 436, Pingtang East Road, Jinhua Town, Xinjin County, Chengdu, Sichuan 610000 (Xinjin Industrial Park) Patentee before: Anrui Zhida (Chengdu) Technology Co.,Ltd. |