CN210461825U - Gas safety relief valve - Google Patents
Gas safety relief valve Download PDFInfo
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- CN210461825U CN210461825U CN201921574091.4U CN201921574091U CN210461825U CN 210461825 U CN210461825 U CN 210461825U CN 201921574091 U CN201921574091 U CN 201921574091U CN 210461825 U CN210461825 U CN 210461825U
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Abstract
The utility model belongs to the technical field of gas transmission and distribution equipment, a gas safety relief valve is disclosed. The main technical characteristics are as follows: the valve comprises a valve body with an air inlet and an air outlet, wherein a valve port is arranged in the valve body, the upper end of the valve body is connected with an adjusting shell through a connecting sleeve body, the adjusting shell comprises an upper cover, a lower cover, a diaphragm with a tray, an adjusting upper cavity and an adjusting lower cavity, the adjusting upper cavity is provided with a pressure adjusting spring, a pressure adjusting plate and a pressure adjusting screw rod, the connecting sleeve body is provided with an inner cavity, a first via hole and an exhaust hole, the exhaust hole is provided with a plug, the lower end of the connecting sleeve body is provided with a support, a valve rod with a valve clack matched with the valve port at the bottom penetrates through the connecting sleeve body from bottom to top and the center of the support, the top of the valve rod is connected with the. The bleeding valve can meet different working conditions through slight modification.
Description
Technical Field
The utility model belongs to the technical field of the gas transmission and distribution equipment, especially, relate to a gas safety relief valve.
Background
The gas safety relief valve is a safety protection device in a gas transmission and distribution system and is installed on a gas pipeline. When the monitored pressure exceeds a set value, the bleeding valve is automatically opened, the excess pressure is discharged to a safe region through the emptying pipeline, and when the monitored pressure is recovered to be normal, the bleeding valve is automatically closed. The low-pressure relief valve used at present mainly has a small caliber, and a safety valve is generally adopted to replace a large-caliber occasion, but the safety valve is not suitable for a low-pressure occasion. The multipurpose pressure regulator of the safety relief valve used by some low-pressure large-flow pressure regulating stations is modified. This has the disadvantage of unstable performance and high manufacturing costs of the safety bleeding valve.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a gas safety relief valve of big-calibre, stable performance, simple structure, and the operating mode occasion that satisfies different pressures simultaneously is provided.
In order to solve the technical problem, the utility model discloses a technical scheme does: the valve comprises a valve body with an air inlet and an air outlet, a valve port is arranged in the valve body, the upper end of the valve body is connected with an adjusting shell through a connecting sleeve body, the adjusting shell comprises an upper cover and a lower cover, a diaphragm with a tray is arranged between the upper cover and the lower cover, the diaphragm and the upper cover form an adjusting upper cavity, the diaphragm and the lower cover form an adjusting lower cavity, the adjusting upper cavity is provided with a pressure adjusting spring, a pressure adjusting plate and a pressure adjusting screw rod, the connecting sleeve body is provided with an inner cavity, the upper end of the connecting sleeve body is provided with a first via hole for communicating the inner cavity with the adjusting lower cavity, the side part of the connecting sleeve body is provided with an exhaust hole for communicating the inner cavity with the outside of the connecting sleeve body, the exhaust hole is provided with a plug, the lower end of the connecting sleeve body is provided with a support, the lower end of the valve rod is provided with a second via hole, the upper end of the second via hole is communicated with the inner cavity, the lower end of the second via hole is provided with a sealing groove, a second sealing ring and a screw are arranged on the sealing groove, and a third sealing ring for dynamic sealing is arranged between the valve rod and the support.
The additional technical characteristics are as follows: the upper end of the connecting sleeve body is movably connected with the lower cover through a bolt, and a fourth sealing ring is arranged between the connecting sleeve body and the lower cover.
The utility model provides a when gas safety bleeding valve used under the low pressure operating mode, plugged up the exhaust hole with the plug, do not set up second sealing washer, screw in seal groove department, pass through pressure regulating plate, pressure regulating spring according to the setting value of bleeding. When the gas valve works, gas enters the valve body from the gas inlet, enters the inner cavity through the second through hole, enters the regulating lower cavity from the inner cavity through the first through hole and acts on the bottom surface of the diaphragm. When the gas pressure value is smaller than the bleeding set value, the valve rod drives the valve clack to seal with the valve port under the action of the pressure regulating spring, and the bleeding valve is in a closed state. When the gas pressure value is larger than the release set value, the gas acting force of the adjusting lower cavity pushes the diaphragm upwards to compress the pressure regulating spring, the tray on the diaphragm drives the valve rod to move upwards, the valve clack opens the valve port, the release valve is opened, and the gas is discharged from the gas outlet to be released. After the diffusion is finished, the gas pressure value of the regulating lower cavity is smaller than the diffusion set value, the pressure regulating spring extends to push the diaphragm downwards, the tray on the diaphragm drives the valve rod to move downwards, the valve clack closes the valve port, and the diffusion valve recovers the closed state.
The utility model provides a when gas safety bleeding valve uses under the high pressure operating mode, take off the plug by the exhaust hole, make inner chamber and the set body outside switch on, avoid because inner chamber, regulation cavity of resorption exist airtight space and influence the effect of diffusing. And a second sealing ring and a screw are arranged at the sealing groove to plug the second via hole. And adjusting the pressure adjusting plate and the pressure adjusting spring through the pressure adjusting screw rod according to the diffusion set value. When the valve works, fuel gas enters the valve body from the air inlet, and the fuel gas directly acts on the valve clack and is compared with the pressure regulating spring. When the gas pressure is less than the set value, the valve rod drives the valve clack to seal with the valve port under the action of the pressure regulating spring, and the diffusion valve is in a closed state. When the gas pressure is greater than the releasing set value, the acting force of the gas directly acting on the valve clack pushes the diaphragm upwards to compress the pressure regulating spring, the tray on the diaphragm drives the valve rod to move upwards, the valve clack opens the valve port, the releasing valve is opened, and the gas is discharged from the gas outlet to be released. After the diffusion is finished, the acting force of the fuel gas directly acting on the valve clack is smaller than a diffusion set value, the pressure regulating spring extends to downwards push the diaphragm, the tray on the diaphragm drives the valve rod to downwards move, the valve clack closes the valve port, and the diffusion valve returns to a closed state.
The utility model provides a gas safety relief valve, simple structure, discharge capacity are big, the security is high, can satisfy different operating mode occasions through slight change to inside. And the large diaphragm is adopted to sense pressure in a low-pressure occasion, so that the action is more sensitive. The upper end of the connecting sleeve body is movably connected with the lower cover through a bolt, and a fourth sealing ring is arranged between the connecting sleeve body and the lower cover. Making slight modifications of the interior more convenient.
Drawings
FIG. 1 is a schematic structural view of the gas safety relief valve of the present invention when in use under a low pressure condition;
FIG. 2 is a schematic structural view of a valve body;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 4 is a schematic structural view of a gas safety relief valve in use under high pressure conditions;
fig. 5 is an enlarged schematic view of the structure at B in fig. 4.
Detailed Description
The specific structure of the gas safety relief valve of the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model relates to a gas safety relief valve includes valve body 1, valve body 1 has air inlet 2 and gas outlet 3, be provided with valve port 4 in the valve body 1, the upper end of valve body 1 is connected with regulation casing 6 through the connecting cover body 5, it includes upper cover 7 to adjust casing 6, lower cover 8, upper cover 7, be provided with the diaphragm 10 that has tray 9 between lower cover 8, diaphragm 10 and upper cover 7 constitute and adjust epicoele 11, diaphragm 10 and lower cover 8 constitute and adjust cavity of resorption 12, it is provided with pressure regulating spring 13 to adjust epicoele 11, pressure regulating board 14, pressure regulating screw 15.
As shown in fig. 2, the valve body 1 has an air inlet 2 and an air outlet 3, a valve port 4 is arranged in the valve body 1, the upper end of the valve body 1 is connected with a lower cover 8 through a connecting sleeve body 5, the connecting sleeve body 5 is provided with an inner cavity 16, the upper end of the connecting sleeve body 5 is provided with a first via hole 17 for communicating the inner cavity 16 with an adjusting lower cavity 12, the side part of the connecting sleeve body 5 is provided with an exhaust hole 18 for communicating the inner cavity 16 with the outside of the connecting sleeve body 5, the exhaust hole 18 is provided with a plug 19, the lower end of the connecting sleeve body 5 is provided with a support 20, a first sealing ring 21 is arranged between the support 20 and the connecting sleeve body 5, a valve rod 23 with a valve flap 22 matched with the valve port 4 penetrates through the connecting sleeve body 5 from bottom to top and the center of the support 20, the top of the valve rod 23 is connected with, a fourth sealing ring 26 is arranged between the connecting sleeve body 5 and the lower cover 8.
As shown in fig. 3, the lower end of the valve rod 23 is provided with a second through hole 27, the upper end of the second through hole 27 is communicated with the inner cavity, and the lower end of the second through hole 27 is provided with a sealing groove 28.
As shown in fig. 4, the utility model relates to a gas safety relief valve includes valve body 1, valve body 1 has air inlet 2 and gas outlet 3, be provided with valve port 4 in the valve body 1, the upper end of valve body 1 is connected with adjusting casing 6 through the set of cover 5, adjusting casing 6 includes upper cover 7, lower cover 8, upper cover 7, be provided with the diaphragm 10 that has tray 9 between lower cover 8, diaphragm 10 and upper cover 7 constitute and adjust epicoele 11, diaphragm 10 and lower cover 8 constitute and adjust cavity 12, it is provided with pressure regulating spring 13 to adjust epicoele 11, pressure regulating plate 14, pressure regulating screw 15, set of cover 5 lateral part is provided with the exhaust hole 18 that is linked together inner chamber 16 and set of cover 5 outside.
As shown in fig. 5, the lower end of the valve rod 23 is provided with a second through hole 27, the upper end of the second through hole 27 is communicated with the inner cavity, the lower end of the second through hole 27 is provided with a sealing groove 28, and the sealing groove 28 is provided with a second sealing ring 29 and a screw 30.
The utility model provides a when gas safety bleeding valve used under the low pressure operating mode, plugged up exhaust hole 18 with plug 19, do not set up second sealing washer 29, screw 30 in seal groove 28 department, pass through pressure regulating screw 15 adjustment pressure regulating plate 14, pressure regulating spring 13 according to the setting value of bleeding. During operation, fuel gas enters the valve body 1 from the gas inlet 2, enters the inner cavity 16 through the second through hole 27, enters the regulating lower cavity 12 from the inner cavity 16 through the first through hole 17, and acts on the bottom surface of the diaphragm 10. When the gas pressure value is smaller than the bleeding set value, the valve rod 23 drives the valve clack 22 to seal with the valve port 4 under the action of the pressure regulating spring 13, and the bleeding valve is in a closed state. When the gas pressure value is larger than the release set value, the gas acting force of the regulating lower cavity 12 pushes the diaphragm 10 upwards to compress the pressure regulating spring 13, the tray 9 on the diaphragm 10 drives the valve rod 23 to move upwards, the valve clack 22 opens the valve port 4, the release valve is opened, and the gas is discharged from the gas outlet 3 to be released. After the diffusion is finished, the gas pressure value of the regulating lower cavity 12 is smaller than the diffusion set value, the pressure regulating spring 13 extends to push the diaphragm 10 downwards, the tray 9 on the diaphragm 10 drives the valve rod 23 to move downwards, the valve clack 22 closes the valve port 4, and the diffusion valve returns to the closed state.
The utility model provides a when gas safety bleeding valve uses under the high pressure operating mode, take off plug 19 by exhaust hole 18, make inner chamber 16 and the 5 outsides of the set of cover switch on, avoid because inner chamber 16, regulation cavity of resorption 12 exist airtight space and influence the effect of bleeding. A second seal ring 29 and a screw 30 are provided in the seal groove 28 to close the second through hole 27. The pressure regulating plate 14 and the pressure regulating spring 13 are regulated by the pressure regulating screw 15 according to the diffusion set value. When the valve works, fuel gas enters the valve body 1 from the gas inlet 2, and the fuel gas directly acts on the valve clack 22 and is compared with the pressure regulating spring 13. When the gas pressure is smaller than the bleeding set value, the valve rod 23 drives the valve clack 22 to seal with the valve port 4 under the action of the pressure regulating spring 13, and the bleeding valve is in a closed state. When the gas pressure is larger than the release set value, the acting force of the gas directly acting on the valve clack 22 pushes the diaphragm 10 upwards to compress the pressure regulating spring 13, the tray 9 on the diaphragm 10 drives the valve rod 23 to move upwards, the valve clack 22 opens the valve port 4, the release valve is opened, and the gas is discharged from the gas outlet 3 to be released. After the diffusion is finished, the acting force of the fuel gas directly acting on the valve clack 22 is smaller than the diffusion set value, the pressure regulating spring 13 extends to push the diaphragm 10 downwards, the tray 9 on the diaphragm 10 drives the valve rod 23 to move downwards, the valve clack 22 closes the valve port 4, and the diffusion valve returns to the closed state.
The utility model provides a gas safety relief valve, simple structure, discharge capacity are big, the security is high, can satisfy different operating mode occasions through slight change to inside. And the large diaphragm is adopted to sense pressure in a low-pressure occasion, so that the action is more sensitive. The upper end of the connecting sleeve body 5 is movably connected with the lower cover 8 through a bolt 25, and a fourth sealing ring 26 is arranged between the connecting sleeve body 5 and the lower cover 8. Making slight modifications of the interior more convenient.
The utility model provides a gas safety relief valve not only is limited to above-mentioned structure, and the all is in the utility model discloses any modification, equivalent replacement and improvement etc. of doing on the basis all should contain within the protection scope of the utility model.
Claims (2)
1. The utility model provides a gas safety relief valve, is provided with valve port, its characterized in that including the valve body that has air inlet and gas outlet in the valve body: the upper end of the valve body is connected with the adjusting shell through a connecting sleeve body, the adjusting shell comprises an upper cover and a lower cover, a diaphragm with a tray is arranged between the upper cover and the lower cover, the diaphragm and the upper cover form an adjusting upper cavity, the diaphragm and the lower cover form an adjusting lower cavity, the adjusting upper cavity is provided with a pressure adjusting spring, a pressure adjusting plate and a pressure adjusting screw rod, the connecting sleeve body is provided with an inner cavity, the upper end of the connecting sleeve body is provided with a first through hole for communicating the inner cavity with the adjusting lower cavity, the side part of the connecting sleeve body is provided with an exhaust hole for communicating the inner cavity with the outside of the connecting sleeve body, the exhaust hole is provided with a plug, the lower end of the connecting sleeve body is provided with a support, a first sealing ring is arranged between the support and the connecting sleeve body, a valve rod with a valve clack matched with a valve, and a sealing groove is formed at the lower end of the second conducting hole, a second sealing ring and a screw are arranged in the sealing groove, and a third sealing ring for dynamic sealing is arranged between the valve rod and the support.
2. A gas safety relief valve according to claim 1, characterized in that: the upper end of the connecting sleeve body is movably connected with the lower cover through a bolt, and a fourth sealing ring is arranged between the connecting sleeve body and the lower cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921574091.4U CN210461825U (en) | 2019-09-21 | 2019-09-21 | Gas safety relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921574091.4U CN210461825U (en) | 2019-09-21 | 2019-09-21 | Gas safety relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210461825U true CN210461825U (en) | 2020-05-05 |
Family
ID=70433203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921574091.4U Active CN210461825U (en) | 2019-09-21 | 2019-09-21 | Gas safety relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210461825U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115614520A (en) * | 2022-12-19 | 2023-01-17 | 常州市潞城燃气设备股份有限公司 | Automatic bleeding valve |
-
2019
- 2019-09-21 CN CN201921574091.4U patent/CN210461825U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115614520A (en) * | 2022-12-19 | 2023-01-17 | 常州市潞城燃气设备股份有限公司 | Automatic bleeding valve |
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