CN221003949U - Reverse air flow closing gas self-closing valve - Google Patents
Reverse air flow closing gas self-closing valve Download PDFInfo
- Publication number
- CN221003949U CN221003949U CN202322578175.8U CN202322578175U CN221003949U CN 221003949 U CN221003949 U CN 221003949U CN 202322578175 U CN202322578175 U CN 202322578175U CN 221003949 U CN221003949 U CN 221003949U
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- valve
- valve plug
- valve body
- port
- gas
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- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims abstract 2
- 238000009423 ventilation Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 claims 1
- 238000013459 approach Methods 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 19
- 238000009434 installation Methods 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- Magnetically Actuated Valves (AREA)
Abstract
The utility model discloses a reverse air flow closed gas self-closing valve, which comprises a valve body, wherein an air inlet pipe is arranged on the valve body, a sealing elastic diaphragm is arranged at a mounting opening on the valve body, a magnetic field gasket is arranged at the end part of a lifting rod after penetrating through the elastic diaphragm, the valve body also comprises a valve plug, a magnet which can be magnetic with the magnetic field gasket is arranged at the upper end surface of the valve plug, a limiting plate which limits the upper and lower movement of the valve plug is also arranged in the valve body, an air vent groove communicated with the air inlet pipe is arranged in the valve body, an air outlet of the air vent groove is arranged into a valve port with an upward opening, the valve plug moves along the valve port in a guiding way, a sealing end surface capable of blocking the valve port is arranged on the valve plug, a sealing ring is arranged on the sealing end surface, and an arc-shaped pressure-bearing groove is arranged at the middle part of the sealing end surface. The gas enters from the gas inlet pipe and then exits along the valve port, and the pressure-bearing groove on the sealing end surface of the valve plug can ensure that the valve plug can stably and accurately bear gas pressure when the gas approaches to an under-pressure state, so that the valve port is prevented from being blocked prematurely, and the under-pressure closing control of the gas is more accurate.
Description
Technical Field
The utility model relates to the field of gas valves, in particular to a reverse airflow closed gas self-closing valve.
Background
Chinese patent grant publication CN 218913856U discloses a high-pressure self-closing gas self-closing valve, which comprises a valve body, wherein an inlet pipeline and an outlet pipeline are arranged on the valve body, and an upward opening valve port is arranged between the inlet pipeline and the outlet pipeline, and is characterized in that: the valve is characterized in that an installation groove is formed in the upper portion of the valve body, the installation groove corresponds to the valve port, a seat body is installed on an opening of the installation groove, an elastic membrane is arranged between the seat body and the installation groove, a lifting rod capable of moving up and down is arranged on the seat body, the end portion of the lifting rod is connected to the elastic membrane, the valve further comprises a magnetic field gasket, and a screw rod of a screw penetrates through the magnetic field gasket and the elastic membrane to be connected with the lifting rod. The valve is characterized in that a valve plug which moves up and down along the valve port is arranged on the valve port, a sealing ring is arranged on the peripheral wall of the valve plug, the upper end of the valve plug is connected with a magnet which corresponds to the magnetic field gasket up and down, and a limiting mechanism is arranged between the valve plug and the valve port.
The working principle is as follows: when under-pressure self-closing detection is carried out, an air source enters the valve body from the air inlet pipeline, a magnetic field gasket on the elastic diaphragm is adsorbed by a magnet on the valve plug under normal air pressure, and meanwhile, the elastic diaphragm is lifted by the normal air pressure to drive the valve plug to move upwards to open the valve port, and then the elastic diaphragm moves downwards under the influence of the gravity of the valve plug after the air pressure is insufficient, so that the valve plug blocks the valve port; when the high-pressure self-closing detection is carried out, the high pressure can lift the elastic diaphragm to move upwards continuously, and the magnetic field gasket and the valve plug are separated after the valve plug is lifted to a certain height due to the influence of the limiting mechanism, so that the valve plug moves downwards and blocks the valve port under the influence of gravity.
The structure mainly has the following defects: when the pressure of the fuel gas gradually decreases along with the air flow entering the valve port, the valve plug can be caused to move downwards under the dead weight, and when the valve plug is at the position close to the valve port, the valve port can suck along the air flow, so that the valve port can be closed when the fuel gas pressure value does not reach the under-pressure closing value, the control range of the under-pressure closing is greatly influenced, and the under-pressure closing control is inaccurate.
Disclosure of utility model
In order to solve the problems, the utility model provides a reverse air flow closing gas self-closing valve, which aims at more accurate gas under-pressure closing control.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a reverse air current closes gas self-closing valve, including the valve body, be provided with the intake pipe on the valve body, be provided with the installing port on the valve body, the installing port installs sealed elastic diaphragm, the tip of a pull rod is disposed the magnetic field gasket after passing the elastic diaphragm, still include the upper and lower direction movable valve plug, the up end of valve plug is disposed can with magnetic field gasket magnetic magnet, still be provided with the limiting plate that limits the valve plug and reciprocate in the valve body, be equipped with in the valve body with the communicating ventilation groove of intake pipe, the gas outlet of ventilation groove sets up the valve port that the opening was up, the valve plug is along the valve port direction activity, the valve plug is provided with the sealing end face that can block the valve port, is provided with the sealing washer on this sealing end face, the middle part of sealing end face is equipped with curved pressure-bearing groove.
A guiding ventilation block is arranged at the lower part of the valve plug, and the guiding ventilation block can move along the valve port in a telescopic way.
The beneficial effects of the utility model are as follows: compared with the prior art, the gas enters from the gas inlet pipe and then exits from the valve port at the rear edge, and the pressure-bearing groove on the sealing end face on the valve plug can ensure that the valve plug can stably and accurately bear gas pressure when the gas approaches to an under-pressure state, so that the valve port is prevented from being blocked prematurely, and the under-pressure closing control of the gas is more accurate.
The utility model is further described below with reference to the drawings and detailed description.
Drawings
FIG. 1 is a block diagram of a specific embodiment of the present utility model;
FIG. 2 is a partial cross-sectional view of a valve plug in accordance with an embodiment of the present utility model.
Detailed Description
The present utility model is described in detail below by way of examples only for further explanation of the present utility model and is not to be construed as limiting the scope of the present utility model.
As shown in fig. 1 and 2, this embodiment discloses a reverse air flow closed gas self-closing valve, which comprises a valve body 1, wherein an air inlet pipe 2 is arranged on the valve body 1, a mounting opening 3 is arranged on the valve body 1, a sealed elastic diaphragm 4 is arranged on the mounting opening 3, a magnetic field gasket 6 is configured at the end part of a lifting rod 5 after penetrating through the elastic diaphragm 4, the valve further comprises a valve plug 7 which guides and moves up and down, a magnet 8 which can magnetically move with the magnetic field gasket 6 is configured at the upper end surface of the valve plug 7, a limiting plate 9 which limits the valve plug 7 to move up and down is further arranged in the valve body 1, a ventilation groove 10 communicated with the air inlet pipe 2 is arranged in the valve body 1, an air outlet of the ventilation groove 10 is provided as a valve port 20 with an upward opening, the valve plug 7 guides and moves along the valve port 20, a sealing end surface 71 which can block the valve port 20 is configured on the sealing end surface 71, and an arc-shaped pressure-bearing groove 73 is arranged in the middle of the sealing end surface 71.
A guiding vent block 74 is arranged at the lower part of the valve plug 7, and the guiding vent block 74 can play a role of guiding, and the guiding vent block 74 can move telescopically along the valve port 20, so that the movement of the valve plug 7 is more stable.
By adopting the technical scheme, the gas enters from the gas inlet pipe 2 and exits from the valve port 20 at the rear edge, and the pressure-bearing groove 73 on the sealing end face 71 on the valve plug 7 can ensure that the valve plug 7 can stably and accurately bear the gas pressure when the gas approaches to an under-pressure state, so that the valve port 20 is prevented from being blocked prematurely, and the under-pressure closing control of the gas is more accurate.
In the past, when the air pressure in the valve body 1 is in the range of 0.6-1.0KPa, the under-pressure state can be automatically closed, and the improved reverse air flow self-closing structure can be accurately controlled in the range of 0.6-0.7 KPa to automatically close the under-pressure, so that the original control range of 0.4KPa is improved to the control range of 0.1KPa, the control precision is improved, and the operation of fuel gas in a wider air pressure range is ensured.
While the fundamental and principal features of the utility model and advantages of the utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (2)
1. The utility model provides a reverse air current closes gas self-closing valve, includes the valve body, is provided with the intake pipe on the valve body, is provided with the installing port on the valve body, and the sealed elastic diaphragm is installed to the installing port, and the tip of a lifting rod is disposed the magnetic field gasket after passing the elastic diaphragm, still includes the valve plug of direction activity from top to bottom, and the up end of valve plug is disposed can with the magnet of magnetic field gasket magnetism, still is provided with the limiting plate that limits the valve plug and reciprocates in the valve body, its characterized in that: the valve body is internally provided with a vent groove communicated with the air inlet pipe, an air outlet of the vent groove is provided with a valve port with an upward opening, the valve plug moves along the valve port in a guiding way, the valve plug is provided with a sealing end face capable of blocking the valve port, the sealing end face is provided with a sealing ring, and the middle part of the sealing end face is provided with an arc-shaped pressure-bearing groove.
2. The reverse airflow shutoff gas self-closing valve of claim 1, wherein: a guiding ventilation block is arranged at the lower part of the valve plug, and the guiding ventilation block can move along the valve port in a telescopic way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322578175.8U CN221003949U (en) | 2023-09-22 | 2023-09-22 | Reverse air flow closing gas self-closing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322578175.8U CN221003949U (en) | 2023-09-22 | 2023-09-22 | Reverse air flow closing gas self-closing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221003949U true CN221003949U (en) | 2024-05-24 |
Family
ID=91124266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322578175.8U Active CN221003949U (en) | 2023-09-22 | 2023-09-22 | Reverse air flow closing gas self-closing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221003949U (en) |
-
2023
- 2023-09-22 CN CN202322578175.8U patent/CN221003949U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |