CN210859937U - Visual middle cavity pressure relief device of axial flow type regulating valve - Google Patents
Visual middle cavity pressure relief device of axial flow type regulating valve Download PDFInfo
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- CN210859937U CN210859937U CN201921571344.2U CN201921571344U CN210859937U CN 210859937 U CN210859937 U CN 210859937U CN 201921571344 U CN201921571344 U CN 201921571344U CN 210859937 U CN210859937 U CN 210859937U
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- valve
- valve body
- pressure relief
- middle cavity
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Abstract
A visual middle cavity pressure relief device of an axial-flow type regulating valve comprises a valve body, a valve body middle cavity arranged in the valve body, a valve rod extending into the valve body middle cavity and used for closing the valve body, a valve cover sleeved outside the valve rod and used for sealing a connecting gap between the valve rod and the valve body, a pressure relief hole arranged inside the valve body and the inner end of the pressure relief hole is communicated with the valve body middle cavity, and a double-thread threaded connector; one end of the double-end threaded connector is in through connection with the outer end of the pressure relief hole, the other end of the double-end threaded connector is in through connection with one end of the four-way connector, and the other three ends of the four-way connector are respectively connected with a pressure gauge, a manual stop valve and a check valve. When the pressure in the inner cavity of the valve body is abnormal, the device can release the pressure in an automatic or manual mode, and can protect the transmission mechanism and the valve from working normally.
Description
Technical Field
The utility model belongs to axial-flow type governing valve, concretely relates to visual lumen pressure relief device of axial-flow type governing valve.
Background
The axial flow type pressure reducing regulating valve is widely applied to regulating and controlling conveying pipelines of petroleum, natural gas and the like due to the advantages of strong flow capacity, high dynamic stability, stable operation, low noise and the like. In the prior art, an inner cavity of a valve body of an axial flow type regulating valve is usually sealed by an O-shaped sealing ring or a flooding plug sealing ring, and a conveyed medium often contains impurities, so that the sealing failure or poor sealing effect of the sealing ring is easily caused, and further the inner cavity of the valve body often has the condition of pressure building, so that the closing force of the valve is increased. Traditional lumen pressure release often adopts the end cap to plug up the pressure release hole, manually operates when needs pressure release, and the condition of valve body inner chamber "suppressing pressure" is not convenient for observe to this kind of structure, also can't realize automatic pressure release.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides a visual lumen pressure relief device of axial-flow type governing valve, the device can carry out the pressure release through automatic or manual mode when valve body inner chamber pressure is unusual, can protect drive mechanism and valve normal work.
In order to achieve the purpose, the utility model provides a visual middle cavity pressure relief device of an axial-flow type regulating valve, which comprises a valve body, a valve body middle cavity arranged in the valve body, a valve rod extending into the valve body middle cavity and used for closing the valve body, a valve cover sleeved outside the valve rod and used for sealing a connection gap between the valve rod and the valve body, a pressure relief hole arranged inside the valve body and the inner end of the pressure relief hole communicated with the valve body middle cavity, and a double-thread threaded joint;
one end of the double-end threaded connector is in through connection with the outer end of the pressure relief hole, the other end of the double-end threaded connector is in through connection with one end of the four-way connector, and the other three ends of the four-way connector are respectively connected with a pressure gauge, a manual stop valve and a check valve.
Preferably, the outlet end of the manual stop valve and the outlet end of the one-way valve are respectively connected with a first connecting pipe and a second connecting pipe.
Preferably, the double-start threaded joint is connected with the outer end of the pressure relief hole through NPT threads.
Preferably, the first connecting pipe and the second connecting pipe are both bent pipes.
After the scheme is adopted, the pressure of the middle cavity of the valve body can be automatically released through the one-way valve arranged at the outer end of the pressure release hole, and the pressure of the middle cavity of the valve body can also be released in a manual pressure release mode. The pressure of the inner cavity of the valve can be conveniently read by an operator through a visual device by the aid of the pressure gauge, so that the sealing effect of the sealing ring can be accurately judged, and corresponding solutions can be taken in time. The device can effectively solve the problem of automatic pressure relief after the pressure in the inner cavity of the valve body rises abnormally, has simple structure and reliable sealing, and can realize automatic pressure relief or manual pressure relief.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the valve comprises a valve body, 2, a valve cover, 3, a valve rod, 4, a pressure gauge, 5, a four-way valve, 6, a manual stop valve, 7, a one-way valve, 8, a first connecting pipe, 9, a second connecting pipe, 10, a double-end threaded connector, 11, a valve body middle cavity, 12 and a pressure relief hole.
Detailed Description
The present invention will be further explained below.
As shown in fig. 1, a visual middle cavity pressure relief device of an axial-flow type regulating valve comprises a valve body 1, a valve body middle cavity 11 arranged in the valve body 1, a valve rod 3 extending into the valve body middle cavity 11 and used for closing the valve body 1, a valve cover 2 sleeved outside the valve rod 3 and used for sealing a connection gap between the valve rod 3 and the valve body 1, a pressure relief hole 12 arranged inside the valve body 1 and having an inner end communicated with the valve body middle cavity 11, and a double-thread joint 10;
one end of the double-end threaded connector 10 is in through connection with the outer end of the pressure relief hole 12, the other end of the double-end threaded connector is in through connection with one end of the four-way valve 5, and the other three ends of the four-way valve 5 are respectively connected with a pressure gauge 4, a manual stop valve 6 and a check valve 7.
The outlet end of the manual stop valve 6 and the outlet end of the one-way valve 7 are respectively connected with a first connecting pipe 8 and a second connecting pipe 9.
The double-threaded nipple 10 is connected with the outer end of the pressure relief hole 12 through an NPT thread.
The first connecting pipe 8 and the second connecting pipe 9 are both bent pipes.
When the pressure in the valve body middle cavity 11 reaches a set value, the pressure pushes away the one-way valve 7 through the pressure relief hole 12 and is released through the first connecting pipe 8; the pressure of the cavity 11 in the valve body can be read visually through the pressure gauge 4, and the pressure can be released through the second connecting pipe 9 through manual operation of the manual stop valve 6.
Claims (4)
1. A visual middle cavity pressure relief device of an axial-flow type regulating valve comprises a valve body (1), a valve body middle cavity (11) arranged in the valve body (1), a valve rod (3) extending into the valve body middle cavity (11) and used for closing the valve body (1), a valve cover (2) sleeved outside the valve rod (3) and used for sealing a connecting gap between the valve rod (3) and the valve body (1), and a pressure relief hole (12) arranged inside the valve body (1) and communicated with the valve body middle cavity (11) at the inner end, and is characterized by further comprising a double-thread connector (10);
one end of the double-end threaded connector (10) is in through connection with the outer end of the pressure relief hole (12), the other end of the double-end threaded connector is in through connection with one end of the four-way connector (5), and the other three ends of the four-way connector (5) are respectively connected with a pressure gauge (4), a manual stop valve (6) and a check valve (7).
2. The visual middle cavity pressure relief device of an axial-flow type regulating valve according to claim 1, characterized in that the outlet end of the manual stop valve (6) and the outlet end of the check valve (7) are respectively connected with a first connecting pipe (8) and a second connecting pipe (9).
3. The visual lumen pressure relief device of an axial flow type regulating valve according to claim 1 or 2, characterized in that the double-threaded nipple (10) is connected with the outer end of the pressure relief hole (12) through NPT threads.
4. The visual middle cavity pressure relief device of an axial-flow type regulating valve according to claim 3, characterized in that the first connecting pipe (8) and the second connecting pipe (9) are both bent pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921571344.2U CN210859937U (en) | 2019-09-20 | 2019-09-20 | Visual middle cavity pressure relief device of axial flow type regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921571344.2U CN210859937U (en) | 2019-09-20 | 2019-09-20 | Visual middle cavity pressure relief device of axial flow type regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210859937U true CN210859937U (en) | 2020-06-26 |
Family
ID=71284379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921571344.2U Expired - Fee Related CN210859937U (en) | 2019-09-20 | 2019-09-20 | Visual middle cavity pressure relief device of axial flow type regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210859937U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116255467A (en) * | 2023-05-10 | 2023-06-13 | 成都成高阀门有限公司 | Double-cutoff forced sealing valve and control method thereof |
| CN116336394A (en) * | 2023-05-31 | 2023-06-27 | 成都成高阀门有限公司 | Automatic medium cavity discharging system and self-detection method thereof |
-
2019
- 2019-09-20 CN CN201921571344.2U patent/CN210859937U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116255467A (en) * | 2023-05-10 | 2023-06-13 | 成都成高阀门有限公司 | Double-cutoff forced sealing valve and control method thereof |
| CN116336394A (en) * | 2023-05-31 | 2023-06-27 | 成都成高阀门有限公司 | Automatic medium cavity discharging system and self-detection method thereof |
| CN116336394B (en) * | 2023-05-31 | 2023-07-21 | 成都成高阀门有限公司 | Automatic medium cavity discharging system and self-detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 Termination date: 20210920 |