CN211853540U - Middle cavity pressure adjusting device for fixed ball valve - Google Patents
Middle cavity pressure adjusting device for fixed ball valve Download PDFInfo
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- CN211853540U CN211853540U CN201922426632.5U CN201922426632U CN211853540U CN 211853540 U CN211853540 U CN 211853540U CN 201922426632 U CN201922426632 U CN 201922426632U CN 211853540 U CN211853540 U CN 211853540U
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Abstract
The utility model provides a lumen pressure regulating device for fixed ball valve belongs to the natural gas equipment field. The middle cavity pressure adjusting device comprises a middle cavity control valve, a connecting pipe, a tee joint and a connecting joint used for being connected with a gas supply device, the inlet of the middle cavity control valve is communicated with the first end of the connecting pipe, the second end of the connecting pipe is communicated with the first interface of the tee joint, the second interface of the tee joint is communicated with the connecting joint, and a pressure release valve is arranged at the third interface of the tee joint. The utility model provides a lumen pressure regulating device for fixed ball valve can pour into the gas of certain pressure into to the lumen of fixed ball valve to be convenient for the switch of fixed ball valve.
Description
Technical Field
The utility model belongs to the field of natural gas equipment, in particular to a lumen pressure regulating device for fixed ball valve.
Background
The fixed ball valve can be suitable for controlling various corrosive and non-corrosive media, thereby being widely applied to oil and gas long-distance pipelines.
In the related art, a fixed ball valve includes a ball body, a valve stem, and a valve seat. The ball body is internally provided with a middle cavity, the ball body is rotatably arranged in the valve seat, one end of the valve rod sequentially penetrates through the valve seat and the ball body and is inserted into the middle cavity of the ball body, and the valve rod and the ball body are fixed together in a sealing mode. The valve rod drives the ball body to rotate, and the on-off control between the upstream pipeline and the downstream pipeline of the fixed ball valve is realized.
After the fixed ball valve shuts off the upstream and downstream pipeline, certain pressure is still kept in the lumen for lumen pressure is unanimous with upstream and downstream pipeline pressure, thereby is convenient for drive the spheroid through the valve rod next time and rotates, in order to open fixed ball valve, and then communicates the upstream and downstream pipeline.
However, in the long-term use, the leakproofness of valve rod and spheroid can worsen gradually, leads to fixed ball valve after the shutoff, and well chamber pressure can't keep, the trouble of releasing to make well chamber pressure and upstream and downstream pipeline pressure have pressure differential, and then lead to the difficulty of opening next time of fixed ball valve.
SUMMERY OF THE UTILITY MODEL
The embodiment of the disclosure provides a middle cavity pressure adjusting device for a fixed ball valve, which is convenient for opening the fixed ball valve when the pressure of the middle cavity and the pressure of an upstream pipeline and a downstream pipeline have pressure difference. The technical scheme is as follows:
the embodiment of the disclosure provides a middle cavity pressure adjusting device for a fixed ball valve, which comprises a middle cavity control valve, a connecting pipe, a tee joint and a connecting joint for connecting an air supply device;
the inlet of the middle cavity control valve is communicated with the first end of the connecting pipe, the second end of the connecting pipe is communicated with the first interface of the tee joint, the second interface of the tee joint is communicated with the connecting joint, and the third interface of the tee joint is provided with a pressure release valve.
Optionally, the middle cavity pressure adjusting device further comprises a connecting double-screw head, a first end of the connecting double-screw head is communicated with the inlet of the middle cavity control valve, and a second end of the connecting double-screw head is communicated with the first end of the connecting pipe.
Optionally, the connecting bifilar head is connected to the connecting tube by a first connecting joint.
Optionally, the connecting bifilar head is a reducing bifilar head.
Optionally, the second end of the connecting pipe is connected to the first port of the tee joint through a second connection joint.
Optionally, the connection joint is a pipe joint or a gas cylinder conversion joint.
Optionally, the second interface of the tee is connected with the connection joint through a third screw head.
Optionally, an outlet of the pressure relief valve is provided with a first pressure gauge.
Optionally, the outlet of the middle cavity control valve is provided with a second pressure gauge.
Optionally, the connection tube is a high pressure hose.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
for the middle cavity pressure adjusting device provided by the embodiment of the disclosure, the tee joint and the gas supply device are communicated together through the connecting joint, and the outlet of the middle cavity control valve is communicated with the middle cavity of the fixed ball valve, so that the gas supply device, the middle cavity pressure adjusting device and the middle cavity are communicated. When the middle cavity pressure is not released, the middle cavity control valve and the pressure release valve are both kept closed, and the middle cavity pressure adjusting device does not work at the moment. When the middle chamber pressure is released, first, the middle chamber control valve is opened. Then, the valve of the gas supply device is opened, so that the gas output by the gas supply device sequentially enters the middle cavity of the fixed ball valve through the tee joint, the connecting pipe and the middle cavity control valve, the pressure of the middle cavity of the fixed ball valve is increased until the pressure of the middle cavity is consistent with the pressure of an upstream pipeline and a downstream pipeline, and the fixed ball valve is convenient to open. And finally, after the pressure of the middle cavity of the fixed ball valve is adjusted, closing the valve of the air supply device and the middle cavity control valve, and opening the pressure release valve, so that the pressure release of the middle cavity pressure adjusting device is realized, and the connecting joint is conveniently taken down from the air supply device. That is to say, through the lumen pressure adjustment device for fixed ball valve that this disclosure provided, pour into the gas of certain pressure into the lumen of fixed ball valve to make lumen pressure unanimous with the pipeline pressure of upstream and downstream, be convenient for open of fixed ball valve, can solve because of lumen pressure relief, and lead to the problem that fixed ball valve opened the difficulty.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a middle chamber pressure adjusting device for a fixed ball valve according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of a reducer twin-screw head provided by an embodiment of the disclosure;
fig. 3 is a schematic structural diagram of a gas cylinder adapter provided in an embodiment of the present disclosure.
The symbols in the drawings represent the following meanings:
1. a lumen control valve; 11. a second pressure gauge; 2. a connecting pipe; 3. a tee joint; 31. a pressure relief valve; 32. a first pressure gauge; 4. connecting a joint; 41. a pipe joint; 42. a gas cylinder adapter; 5. connecting the double-thread ends; 51. reducing double-thread heads; 6. a first filament head; 7. a second filament end; 8. a third thread end; 100. a middle cavity.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
The disclosed embodiment provides a middle chamber pressure adjusting device for a fixed ball valve, which comprises a middle chamber control valve 1, a connecting pipe 2, a tee 3 and a connecting joint 4 for connecting a gas supply device, as shown in fig. 1.
The inlet of the middle cavity control valve 1 is communicated with the first end of the connecting pipe 2, the second end of the connecting pipe 2 is communicated with the first interface of the tee joint 3, the second interface of the tee joint 3 is communicated with the connecting joint 4, and the third interface of the tee joint 3 is provided with a pressure release valve 31.
For the middle cavity pressure adjusting device provided by the embodiment of the disclosure, the tee joint 3 and the gas supply device are communicated together through the connecting joint 4, and the outlet of the middle cavity control valve 1 is communicated with the middle cavity of the fixed ball valve, so that the gas supply device, the middle cavity pressure adjusting device and the middle cavity are communicated. When the middle chamber pressure is not released, the middle chamber control valve 1 and the pressure release valve 31 are both kept closed, and the middle chamber pressure adjusting device does not work at the moment. When the middle chamber pressure is released, first, the middle chamber control valve 1 is opened. Then, the valve of the gas supply device is opened, so that the gas output by the gas supply device sequentially enters the middle cavity of the fixed ball valve through the tee joint 3, the connecting pipe 2 and the middle cavity control valve 1, the pressure of the middle cavity of the fixed ball valve is increased until the pressure of the middle cavity is consistent with the pressure of an upstream pipeline and a downstream pipeline, and the fixed ball valve is conveniently opened. Finally, after the pressure adjustment of the middle cavity of the fixed ball valve is completed, the valve of the air supply device and the middle cavity control valve 1 are closed, and the pressure release valve 31 is opened, so that the pressure release of the pressure adjustment device of the middle cavity pressure adjustment device is realized, and the connecting joint 4 is conveniently taken down from the air supply device. That is to say, through the lumen pressure adjustment device for fixed ball valve that this disclosure provided, pour into the gas of certain pressure into the lumen of fixed ball valve to make lumen pressure unanimous with the pipeline pressure of upstream and downstream, be convenient for open of fixed ball valve, can solve because of lumen pressure relief, and lead to the problem that fixed ball valve opened the difficulty.
It should be noted that the outlet of the middle cavity control valve 1 may be welded and communicated with the side of the valve seat of the fixed ball valve, when the ball rotates to the fixed ball valve to be in a closed state, the outlet of the middle cavity control valve 1 is communicated with the middle cavity of the ball, and when the ball rotates to the fixed ball valve to be in an open state, the outlet of the middle cavity control valve 1 is not communicated with the middle cavity of the ball.
It should be noted that the gas supply device may be an on-site pipeline or an inert gas cylinder, and the inert gas cylinder may be a helium cylinder or a nitrogen cylinder, etc.
In this embodiment, the middle chamber pressure adjusting device further comprises a connecting double-screw head 5, a first end of the connecting double-screw head 5 is communicated with the inlet of the middle chamber control valve 1, and a second end of the connecting double-screw head 5 is communicated with the first end of the connecting pipe 2.
In the above embodiment, the connection double-threaded head 5 can secure the connection strength between the middle chamber control valve 1 and the connection pipe 2 to withstand the pressure at the time of ventilation.
It is easily understood that the middle chamber pressure adjusting means needs to maintain a large connection strength at each connection when the air supply means supplies air to the middle chamber pressure adjusting means. The first end of the connecting double-screw head 5 is connected with the outlet of the middle cavity control valve 1 in a threaded manner, and the second end of the connecting double-screw head 5 is connected with the connecting pipe 2 in a threaded manner, so that the connecting strength of the middle cavity control valve 1 and the connecting pipe 2 is effectively ensured by connecting the double-screw head 5.
Alternatively, the connection pipe 2 is a high-pressure hose.
In the above embodiment, the connecting pipe 2 is a high-pressure hose, so that the connecting pipe 2 has strong pressure-bearing capacity on one hand, and the connecting pipe 2 can be arranged in any direction on the other hand, thereby greatly facilitating the communication between the middle cavity pressure adjusting device and the gas supply device.
With continued reference to fig. 1, the connecting nipple 5 is connected to the connecting tube 2 by means of a first nipple 6.
In the above embodiment, the first thread 6 facilitates the connection of the connecting tube 2 with the connecting duplex thread 5. That is, the first screw head 6 is arranged, so that the connecting pipe 2 is inserted into the first screw head 6, and then the first screw head 6 and the connecting double screw head 5 are screwed together, thereby realizing the connection of the connecting pipe 2 and the connecting double screw head 5. That is, the first thread 6 plays a role of assisting in connecting the connection pipe 2 and the connection duplex 5.
Optionally, the connecting bifilar 5 is a reducing bifilar 51 (see fig. 2).
In the above embodiment, the connecting double-threaded head 5 is the reducing double-threaded head 51 so that the connecting double-threaded head 5 can be connected with the lumen control valves 1 of different sizes.
It will be readily appreciated that different sizes of the middle chamber control valve 1 should be selected for different sizes of fixed ball valves to rapidly inject gas into the middle chamber 100 of the fixed ball valve. By setting the connecting double-threaded head 5 as the reducing double-threaded head 51, when adjusting fixed ball valves of different sizes, only the middle cavity control valve 1 and the corresponding connecting double-threaded head 5 need to be replaced, and the connecting pipe 2 does not need to be replaced.
Illustratively, in the present embodiment, the sizes of the two ends of the reducer double-head 51 are 4 minutes and 6 minutes respectively.
Optionally, the second end of the connecting tube 2 is connected with the first interface of the tee 3 through a second screw head 7.
In the above embodiment, the second nipple 7 facilitates the connection of the connection tube 2 with the tee 3.
It should be noted that the structure of the second filament 7 may be substantially similar to that of the first filament 6, and is not described herein again.
It should be noted that, the two ends of the connecting pipe 2 are both fixedly provided with a connecting joint, and the connecting pipe 2 can be connected with the first screw head 6 and the second screw head 7 by the insertion of the connecting joints.
Alternatively, the connection joint 4 is a pipe joint 41 or a gas cylinder switching joint 42 (see fig. 3).
In the above embodiment, the connection fitting 4 may be a pipe fitting 41 when there is a pressurized gas in the field pipe. The pipe is used as a gas supply device, so that the pressure gas in the pipe is injected into the middle cavity 100 of the fixed ball valve through the connection of the pipe joint 41 and the pipe. When there is no gas under pressure in the field pipeline, the connection fitting 4 may be a gas cylinder adapter 42. An inert gas cylinder is used as a gas supply means so as to communicate with the inert gas cylinder through the cylinder switching joint 42, and the gas of the inert gas cylinder is injected into the middle chamber 100 of the fixed ball valve. Thereby realizing the supply of the gas of the multi-mode gas source to the middle cavity 100 of the fixed ball valve.
Optionally, the second interface of the tee 3 is connected with the connection joint 4 through a third screw 8.
In the above embodiment, the third thread 8 can increase the connection strength of the tee joint 3 and the junction joint 4.
Optionally, the outlet of the pressure relief valve 31 is provided with a first pressure gauge 32.
In the above embodiment, the first pressure gauge 32 functions to detect the pressure release when the pressure release valve 31 releases the pressure, that is, to detect the discharge of the gas in the middle chamber pressure adjusting device.
Illustratively, after the pressure adjustment of the middle cavity 100 of the fixed ball valve is completed, the pressure relief valve 31 is opened, the reading of the first pressure gauge 32 changes from large to small, and when the reading of the first pressure gauge 32 tends to 0, the air pressure in the middle cavity pressure adjusting device is consistent with the atmosphere, and the air supply device is detached most conveniently.
Optionally, the outlet of the middle chamber control valve 1 is provided with a second pressure gauge 11.
In the above embodiment, on the one hand, the second pressure gauge 11 functions to monitor the pressure of the gas flowing into the middle chamber 100 of the fixed ball valve. On the other hand, the second pressure gauge 11 may function to check the airtightness of the middle chamber pressure adjusting means.
It will be readily appreciated that the middle chamber control valve 1 will open when the pressure in the middle chamber 100 of the fixed ball valve is adjusted. The pressure of the gas flowing into the middle chamber 100 of the fixed ball valve can be rapidly determined by the second pressure gauge 11, and the exhaust pressure of the gas supply device is compared, so that the airtightness of the middle chamber pressure adjusting device can be checked.
The middle cavity pressure adjusting device has the following advantages:
1. the pressure of the middle cavity 100 of the fixed ball valve can be consistent with the pressure of an upstream pipeline and a downstream pipeline through the middle cavity pressure adjusting device.
2. The ball valve can be suitable for fixing the ball valve in a natural gas pipeline station.
The operation of the middle chamber pressure regulating device is briefly described as follows:
when the middle chamber pressure is not released, the middle chamber control valve 1 and the pressure release valve 31 are both kept closed, and the middle chamber pressure adjusting device does not work at the moment. When the middle chamber pressure is released, first, the gas supply device is connected through the connection joint 4, the relief valve 31 is closed, and the middle chamber control valve 1 is opened. Then, the valve of the gas supply device is opened. And finally, after the pressure of the middle cavity of the fixed ball valve is adjusted, closing the valve of the gas supply device and the middle cavity control valve 1, opening the pressure release valve 31, and taking down the gas supply device from the connecting joint 4.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. A middle cavity pressure adjusting device for a fixed ball valve is characterized by comprising a middle cavity control valve (1), a connecting pipe (2), a tee joint (3) and a connecting joint (4) for connecting an air supply device;
the import of lumen control valve (1) with the first end intercommunication of connecting pipe (2), the second end of connecting pipe (2) with the first interface intercommunication of tee bend (3), the second interface of tee bend (3) with attach fitting (4) intercommunication, the third interface of tee bend (3) is provided with relief valve (31).
2. The lumen pressure regulating device according to claim 1, further comprising a connecting double-threaded head (5), a first end of the connecting double-threaded head (5) communicating with an inlet of the lumen control valve (1), a second end of the connecting double-threaded head (5) communicating with a first end of the connecting tube (2).
3. The lumen pressure regulating device according to claim 2, characterized in that the connecting double-threaded head (5) is connected with the connecting tube (2) by a first threaded head (6).
4. The lumen pressure regulating device according to claim 2, wherein the connecting bifilar (5) is a reducer bifilar (51).
5. The middle chamber pressure regulating device according to any one of claims 1-4, characterized in that the second end of the connecting tube (2) is connected with the first port of the tee (3) by a second nipple (7).
6. The middle chamber pressure regulating device according to any one of claims 1 to 4, characterized in that the connecting joint (4) is a pipe joint (41) or a gas cylinder adapter (42).
7. The middle chamber pressure regulating device according to any one of claims 1 to 4, characterized in that the second port of the tee (3) is connected to the connecting nipple (4) by a third thread (8).
8. A middle chamber pressure regulating device according to any of claims 1-4, characterized in that the outlet of the pressure relief valve (31) is provided with a first pressure gauge (32).
9. A middle chamber pressure regulating device according to any of claims 1-4, characterized in that the outlet of the middle chamber control valve (1) is provided with a second pressure gauge (11).
10. The middle chamber pressure regulating device according to any one of claims 1 to 4, wherein the connecting tube (2) is a high pressure hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922426632.5U CN211853540U (en) | 2019-12-27 | 2019-12-27 | Middle cavity pressure adjusting device for fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922426632.5U CN211853540U (en) | 2019-12-27 | 2019-12-27 | Middle cavity pressure adjusting device for fixed ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211853540U true CN211853540U (en) | 2020-11-03 |
Family
ID=73209702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922426632.5U Active CN211853540U (en) | 2019-12-27 | 2019-12-27 | Middle cavity pressure adjusting device for fixed ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211853540U (en) |
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2019
- 2019-12-27 CN CN201922426632.5U patent/CN211853540U/en active Active
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