CN211975920U - Pilot-operated type pressure reducing valve with fault emergency cut-off function - Google Patents
Pilot-operated type pressure reducing valve with fault emergency cut-off function Download PDFInfo
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- CN211975920U CN211975920U CN202020267911.1U CN202020267911U CN211975920U CN 211975920 U CN211975920 U CN 211975920U CN 202020267911 U CN202020267911 U CN 202020267911U CN 211975920 U CN211975920 U CN 211975920U
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- 238000007789 sealing Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000001737 promoting effect Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of the relief pressure valve technique and specifically relates to a pilot-operated formula relief pressure valve with trouble emergency shutdown function, including the relief pressure valve, the pilot valve has been placed to the relief pressure valve side, the needle valve, through the pipeline intercommunication between pilot valve and the needle valve, the one end that the needle valve was kept away from to the pilot valve has control mechanism through the pipeline intercommunication, pneumatic mechanism is installed to control mechanism one end, pipeline and the inboard intercommunication of relief pressure valve are passed through to the one end that control mechanism kept away from the pilot valve, and the one end that the pilot valve was kept away from to the. The utility model discloses simple structure can reach the urgent cut-off function of trouble, is worth promoting.
Description
Technical Field
The utility model relates to a relief pressure valve technical field especially relates to a pilot-operated formula relief pressure valve with trouble emergency shutdown function.
Background
In a valve pipeline, when the pressure at the outlet end is overlarge, the medium normal circulation is influenced, a pressure reducing valve is a valve capable of automatically opening and closing according to the working pressure of a system, when the pressure at the outlet end is larger than the specified pressure, the pressure reducing valve can be automatically closed to achieve the effect of reducing the pressure and ensure the pipeline stability, generally, the pressure reducing valve comprises a valve body, a valve seat, a valve core and a valve rod, the valve core is connected with an elastic pressure device, the valve core is tightly pressed and sealed with the valve seat through elastic pressure, when the pressure at the outlet end of the valve body is overlarge, the valve core is pushed to close by overcoming the elastic pressure, the valve is reset under the action of the elastic pressure after the pressure reduction is finished, after the overpressure, the valve body cannot be closed, the medium with the overproof pressure still enters a downstream pipe, the capacities of a breather valve and an, the storage tank and other components connected with the downstream pipeline can be damaged, when the relay pump in front of the valve loses power and the like, the pressure before the valve is insufficient, the valve cannot be closed, and the medium still continuously enters the water pump and other components of the downstream pipeline and can be damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defect that the downstream pipeline of the pressure reducing valve and other components in the prior art can be damaged, and providing a pilot-operated pressure reducing valve with a fault emergency cut-off function.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the pilot-operated type pressure reducing valve with the fault emergency cut-off function comprises a pressure reducing valve, wherein a pilot valve and a needle valve are placed on the side surface of the pressure reducing valve, the pilot valve is communicated with the needle valve through a pipeline, one end, far away from the needle valve, of the pilot valve is communicated with a control mechanism through a pipeline, one end, far away from the pilot valve, of the control mechanism is provided with a pneumatic mechanism, one end, far away from the pilot valve, of the control mechanism is communicated with the inner side of the pressure reducing valve through a pipeline, and one end, far away from the pilot;
control mechanism includes sleeve, end cover, drain pipe, feed liquor pipe, sprue, connecting block, spring, a plurality of mounting hole, the end cover welding is inboard at telescopic one end, the sprue is located telescopic other end inboard, connecting block and sprue fixed connection, it is a plurality of the one end of end cover is kept away from to the mounting hole site in the sleeve, the spring is located the mounting hole, the both ends of spring respectively with connecting block, sleeve fixed connection, drain pipe, feed liquor pipe with the inboard intercommunication of sleeve, telescopic one end is kept away from to the feed liquor pipe is passed through pipeline and the inboard intercommunication of relief pressure valve, telescopic one end is kept away from to the drain pipe is passed through pipeline and the inboard intercommunication of relief pressure valve.
Preferably, pneumatic mechanism is including aerifing sleeve, connecting rod, movable block, two connecting pipes, sealing washer, the one end fixed connection that the end cover was kept away from to the one end of aerifing sleeve and sleeve, it is sealed to aerify the telescopic other end, the one end of sprue is kept away from at the connecting block to connecting rod fixed connection, the other end fixed connection of movable block and connecting rod, the sealing washer bonds in the movable block outside, the one end and the contact of aerifing the sleeve inside wall of movable block are kept away from to the sealing washer, two the connecting pipe is located aerifing sleeve side top and bottom respectively, aerify sleeve and connecting pipe intercommunication.
Preferably, the top of the side face of the plugging block is sleeved with a plurality of sealing gaskets, and one end, far away from the plugging block, of each sealing gasket is in contact with the inner side wall of the sleeve.
Preferably, the outer diameter of the connecting block is smaller than the inner diameter of the inflating sleeve.
The utility model provides a pair of pilot-operated formula relief pressure valve with trouble emergency shutdown function, beneficial effect lies in:
the utility model discloses a set up sleeve, end cover, drain pipe, feed liquor pipe, sprue, connecting block, spring, a plurality of mounting hole, through the position of control sprue in the sleeve to whether control drain pipe and feed liquor pipe can communicate, thereby the operating condition of control pilot valve.
Drawings
Fig. 1 is a schematic structural diagram of a pilot-operated pressure reducing valve with a fault emergency cut-off function according to the present invention;
fig. 2 is a cross-sectional view of a control mechanism in a pilot-operated pressure reducing valve with a fault emergency cut-off function according to the present invention.
In the figure: the needle valve comprises a needle valve 1, a pilot valve 2, a sleeve 3, an end cover 4, a liquid outlet pipe 5, a liquid inlet pipe 6, a blocking block 7, a mounting hole 8, a spring 9, a sealing washer 10, an inflatable sleeve 11, a connecting block 12, a connecting rod 13, a movable block 14, a sealing washer 15, a connecting pipe 16 and a pressure reducing valve 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example one
Referring to fig. 1-2, a pilot-operated pressure reducing valve with a fault emergency cut-off function comprises a pressure reducing valve 17, a pilot valve 2 and a needle valve 1 are placed on the side surface of the pressure reducing valve 17, the pilot valve 2 is communicated with the needle valve 1 through a pipeline, one end of the pilot valve 2, which is far away from the needle valve 1, is communicated with a control mechanism through a pipeline, one end of the control mechanism, which is far away from the pilot valve 2, is communicated with the inner side of the pressure reducing valve 17 through a pipeline, one end of the needle valve 1, which is far away from the pilot valve 2, is communicated with the inner side of the pressure reducing valve 17 through a pipeline, and the connection point of the needle valve 1;
control mechanism includes sleeve 3, end cover 4, drain pipe 5, feed liquor pipe 6, sprue 7, connecting block 12, spring 9, a plurality of mounting hole 8, end cover 4 welds in telescopic 3's one end inboardly, sprue 7 is located telescopic 3's other end inboardly, connecting block 12 and sprue 7 fixed connection, a plurality of mounting hole 8 are located the one end that end cover 4 was kept away from to sleeve 3, spring 9 is located mounting hole 8, spring 9's both ends respectively with connecting block 12, sleeve 3 fixed connection, drain pipe 5, feed liquor pipe 6 communicates with sleeve 3 is inboard, the one end that sleeve 3 was kept away from to feed liquor pipe 6 is through pipeline and the inboard intercommunication of relief pressure valve 17, the one end that sleeve 3 was kept away from to drain pipe 5 is through pipeline and the inboard intercommunication of relief pressure valve 17.
7 side top covers of sprue have a plurality of seal ring 10, and seal ring 10 can avoid the medium to flow from sprue 7 and sleeve 3 contact department, and seal ring 10 keeps away from the one end and the 3 inside wall contacts of sprue 7, and the external diameter of connecting block 12 is less than the internal diameter of inflatable sleeve 11, makes connecting block 12 can inflate 11 inboard removal relatively like this.
When the valve works normally, the pressure behind the valve is reduced, the outlet of the pilot valve is enlarged, the medium flow of the cavity above the diaphragm of the main valve is increased and is exhausted to the valve through the pilot valve, the medium pressure is reduced under the action of enlarging the outlet of the pilot valve and throttling the small hole of the needle valve, and after high-pressure medium enters the valve through the main valve before the valve core opens the valve, the pressure behind the valve is increased to a balance value, and the pressure after the valve is kept stable according to the method.
When the valve normally works, the pressure behind the valve rises, the outlet of the pilot valve is reduced, high-pressure medium above the main valve diaphragm before the cavity medium flow reducing valve flows to the cavity medium pressure above the main valve diaphragm through the needle valve, the valve core moves downwards, the flow section of the main valve is reduced, the medium pressure behind the valve is gradually reduced until balance is achieved, and the pressure after the valve is kept stable according to the method.
Example two
Referring to fig. 2, as another preferred embodiment of the present invention, on the basis of the first embodiment, the pneumatic mechanism includes an inflatable sleeve 11, a connecting rod 13, a movable block 14, two connecting pipes 16, and a sealing ring 15, wherein one end of the inflatable sleeve 11 is fixedly connected to one end of the sleeve 3 away from the end cap 4, the other end of the inflatable sleeve 11 is sealed, the connecting rod 13 is fixedly connected to one end of the connecting block 12 away from the blocking block 7, the movable block 14 is fixedly connected to the other end of the connecting rod 13, the sealing ring 15 is adhered to the outside of the movable block 14, one end of the sealing ring 15 away from the movable block 14 is in contact with the inner side wall of the inflatable sleeve 11, the two connecting pipes 16 are respectively located at the top and the bottom of the side of the inflatable sleeve 11, the inflatable sleeve 11 is communicated with the connecting pipes 16, the two connecting rods 16 are externally, and the movable block 14 is connected with the connecting block 12 through the connecting rod 13, thereby controlling the position of the block 7 in the sleeve 3.
When the valve works normally, the pressure behind the valve is reduced, the outlet of the pilot valve is enlarged, the medium flow of the cavity above the diaphragm of the main valve is increased and is exhausted to the valve through the pilot valve, the medium pressure is reduced under the action of enlarging the outlet of the pilot valve and throttling the small hole of the needle valve, and after high-pressure medium enters the valve through the main valve before the valve core opens the valve, the pressure behind the valve is increased to a balance value, and the pressure after the valve is kept stable according to the method.
When the valve normally works, the pressure behind the valve rises, the outlet of the pilot valve is reduced, high-pressure medium above the main valve diaphragm before the cavity medium flow reducing valve flows to the cavity medium pressure above the main valve diaphragm through the needle valve, the valve core moves downwards, the flow section of the main valve is reduced, the medium pressure behind the valve is gradually reduced until balance is achieved, and the pressure after the valve is kept stable according to the method.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. A pilot-operated type pressure reducing valve with a fault emergency cut-off function comprises a pressure reducing valve (17) and is characterized in that a pilot valve (2) and a needle valve (1) are placed on the side face of the pressure reducing valve (17), the pilot valve (2) is communicated with the needle valve (1) through a pipeline, one end, far away from the needle valve (1), of the pilot valve (2) is communicated with a control mechanism through a pipeline, one end of the control mechanism is provided with a pneumatic mechanism, one end, far away from the pilot valve (2), of the control mechanism is communicated with the inner side of the pressure reducing valve (17) through a pipeline, and one end, far away from the pilot valve (2), of the needle valve (1) is communicated with the inner side;
the control mechanism comprises a sleeve (3), an end cover (4), a liquid outlet pipe (5), a liquid inlet pipe (6), a blocking block (7), a connecting block (12), a spring (9) and a plurality of mounting holes (8), wherein the end cover (4) is welded at the inner side of one end of the sleeve (3), the blocking block (7) is positioned at the inner side of the other end of the sleeve (3), the connecting block (12) is fixedly connected with the blocking block (7), the mounting holes (8) are positioned at one end, far away from the end cover (4), of the sleeve (3), the spring (9) is positioned in the mounting holes (8), two ends of the spring (9) are respectively fixedly connected with the connecting block (12) and the sleeve (3), the liquid outlet pipe (5) and the liquid inlet pipe (6) are communicated with the inner side of the sleeve (3), one end, far away from the sleeve (3), of the liquid inlet pipe (6) is communicated with the, one end of the liquid outlet pipe (5) far away from the sleeve (3) is communicated with the inner side of the pressure reducing valve (17) through a pipeline.
2. The pilot-operated pressure reducing valve with the fault emergency cut-off function is characterized in that the pneumatic mechanism comprises an inflating sleeve (11), a connecting rod (13), a movable block (14), two connecting pipes (16) and a sealing ring (15), one end of the inflating sleeve (11) is fixedly connected with one end, away from the end cover (4), of the sleeve (3), the other end of the inflating sleeve (11) is sealed, the connecting rod (13) is fixedly connected with one end, away from the block (7), of the connecting block (12), the movable block (14) is fixedly connected with the other end of the connecting rod (13), the sealing ring (15) is bonded on the outer side of the movable block (14), one end, away from the movable block (14), of the sealing ring (15) is in contact with the inner side wall of the inflating sleeve (11), and the two connecting pipes (16) are respectively positioned at the top and the bottom of the side face of the inflating sleeve (11), the inflatable sleeve (11) is communicated with a connecting pipe (16).
3. The pilot-operated pressure reducing valve with the emergency shutdown function according to claim 1, wherein a plurality of sealing gaskets (10) are sleeved on the top of the side surface of the block (7), and one end of each sealing gasket (10) far away from the block (7) is in contact with the inner side wall of the sleeve (3).
4. A pilot operated pressure reducing valve with fail safe shut off function according to claim 2, wherein the outer diameter of the connecting block (12) is smaller than the inner diameter of the inflating sleeve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020267911.1U CN211975920U (en) | 2020-03-06 | 2020-03-06 | Pilot-operated type pressure reducing valve with fault emergency cut-off function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020267911.1U CN211975920U (en) | 2020-03-06 | 2020-03-06 | Pilot-operated type pressure reducing valve with fault emergency cut-off function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211975920U true CN211975920U (en) | 2020-11-20 |
Family
ID=73377733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020267911.1U Active CN211975920U (en) | 2020-03-06 | 2020-03-06 | Pilot-operated type pressure reducing valve with fault emergency cut-off function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211975920U (en) |
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2020
- 2020-03-06 CN CN202020267911.1U patent/CN211975920U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231222 Address after: 363900 No.1 Shunda Road, Gunong Farm, Changtai District, Zhangzhou City, Fujian Province Patentee after: Fujian Huishang Technology Co.,Ltd. Address before: 363900 Yintang Industrial Zone, Gu Nong farm, Changtai County, Zhangzhou City, Fujian Province Patentee before: DATONG RECIPROCITY GROUP CO.,LTD. |
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| TR01 | Transfer of patent right |