CN211550600U - Hydraulic drive ball valve with backpressure unloading device - Google Patents
Hydraulic drive ball valve with backpressure unloading device Download PDFInfo
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- CN211550600U CN211550600U CN201922128994.6U CN201922128994U CN211550600U CN 211550600 U CN211550600 U CN 211550600U CN 201922128994 U CN201922128994 U CN 201922128994U CN 211550600 U CN211550600 U CN 211550600U
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Abstract
The utility model discloses a take hydraulic drive ball valve of backpressure uninstallation device relates to valve drive technical field, and this ball valve includes: the valve comprises a valve ball, a valve seat, a driving assembly and a valve body; the valve ball and the valve seat are positioned in the valve body, the valve seat is in sliding sealing fit with the valve body, the valve seat comprises a valve seat front end far away from the valve ball and a valve seat rear end close to the valve ball, a sealing ring matched with the valve ball is arranged on the valve seat rear end, and the sealing ring divides an inner cavity of the valve body into a front cavity and a rear cavity; the drive assembly is fixed to the valve body and includes a drive piston coupled to the valve seat, the drive piston configured to: when the ball valve is opened, the driving piston drives the valve seat to move so that the valve ball is separated from the sealing ring, and the front cavity is communicated with the rear cavity. The utility model discloses a ball valve can reduce the ball valve and open required moment, reduces opening device's power parameter in the ball valve, has practiced thrift equipment purchasing cost.
Description
Technical Field
The utility model relates to a valve drive technical field, concretely relates to take hydraulic drive ball valve of backpressure uninstallation device.
Background
The ball valve has wide application in the fields of petroleum, chemical industry, energy, mineral products and the like, is an important component in industrial pipelines, and has the main function of quickly isolating a damaged pipe section when the pipeline leaks so as to ensure the safety of the pipeline and field personnel.
In a high-pressure pipeline, the pressure difference between the front and the back of a ball valve when the ball valve is closed is very large (the pressure before the ball valve is P, the pressure after the ball valve is 0, and P is far more than 0), the ball valve of the ball valve is tightly pressed on a valve rod under the pressure of a medium, so that the valve can be opened only by large driving torque, and a high-power valve opening device needs to be equipped, thereby greatly improving the purchase cost of equipment and also increasing the total weight and volume of the valve. Meanwhile, when the ball valve is opened at every time, the sealing ring on the valve seat can rub with the surface of the ball body under high acting force, so that the sealing ring is easily worn and loses efficacy, and the valve fault is caused.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the prior art, the utility model aims to provide a take hydraulic drive ball valve of backpressure uninstallation device, it is used for solving among the prior art problem that the ball valve needs very big drive moment to open.
In order to achieve the above purpose, the utility model adopts the technical proposal that: a hydraulically actuated ball valve with a back pressure relief device, comprising: the valve comprises a valve ball, a valve seat, a driving assembly and a valve body;
the valve ball and the valve seat are positioned in the valve body, the valve seat is in sliding sealing fit with the valve body, the valve seat comprises a valve seat front end far away from the valve ball and a valve seat rear end close to the valve ball, a sealing ring matched with the valve ball is arranged on the valve seat rear end, and the sealing ring divides an inner cavity of the valve body into a front cavity and a rear cavity;
the drive assembly is fixed to the valve body and includes a drive piston coupled to the valve seat, the drive piston configured to: when the ball valve is opened, the driving piston drives the valve seat to move so that the valve ball is separated from the sealing ring, and the front cavity is communicated with the rear cavity.
On the basis of the technical scheme, the driving assembly further comprises a piston cylinder, the driving piston is sleeved in the piston cylinder and can move along the axis of the piston cylinder, an end cover is arranged at the end part of the piston cylinder, a sealing cavity is formed between the end cover and the driving piston, and an oil hole communicated with the sealing cavity is formed in the piston cylinder.
On the basis of the above technical scheme, the ball valve further comprises:
the bidirectional hydraulic oil cylinder comprises a bidirectional piston and an oil cylinder body, wherein the bidirectional piston is sleeved in the oil cylinder body to slide, the bidirectional piston comprises two pistons and piston rods connected with the two pistons, the two pistons and the oil cylinder body form a second sealing cavity and a third sealing cavity, the piston rods are provided with racks, the racks are connected with a gear, and the gear is connected with a valve rod of the ball valve.
The shuttle valve is connected with the bidirectional hydraulic oil cylinder and provided with an X port, a Y port and a Z port, the X port and the Y port are respectively communicated with the second sealing cavity and the third sealing cavity, and the Z port is communicated with the oil hole.
On the basis of the technical scheme, the driving assembly further comprises a driving rod, through holes are formed in the piston cylinder and the valve body, the driving rod penetrates through the through holes, and two ends of the driving rod are connected with the driving piston and the valve seat respectively.
On the basis of the technical scheme, the driving rod is provided with an external thread at the end connected with the valve seat, and the valve seat is provided with a threaded hole matched with the external thread.
On the basis of the technical scheme, a ball body is arranged at one end, connected with the driving piston, of the driving rod, and a square through hole matched with the ball body is formed in the driving piston.
On the basis of the technical scheme, the valve seat is of an annular structure and is provided with an outer annular surface of the valve seat, the valve body is provided with an inner hole surface of the valve body, and the inner hole surface of the valve body is in sliding sealing fit with the outer annular surface of the valve seat.
On the basis of the above technical scheme, the ball valve further comprises: and the return spring is arranged between the front end of the valve seat and the valve body.
On the basis of the technical scheme, the valve body is provided with a plurality of mounting holes, the reset spring is sleeved in the mounting holes, and the mounting holes are annularly and uniformly distributed on the valve body.
On the basis of the technical scheme, the rear end of the valve seat is provided with an annular groove, the sealing ring is installed in the annular groove, and the side, close to the valve ball, of the sealing ring is arc-shaped.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a take hydraulic drive ball valve of backpressure uninstallation device opens the ball valve in-process, removes through drive assembly drive disk seat for the sealing ring of valve ball and disk seat rear end breaks away from, and antechamber and back chamber switch on, and pressure differential around the valve ball reduces by a wide margin, reduces the ball valve and opens required moment, thereby reduces opening device's power parameter in the ball valve, has practiced thrift equipment purchasing cost, reduces the overall volume and the weight of ball valve. Furthermore, the utility model discloses take hydraulic drive ball valve of backpressure uninstallation device through setting up the shuttle valve, and hydraulic drive valve rod rotates the in-process and drives the disk seat simultaneously and removes, and one set of hydraulic means realizes two functions, and equipment utilization is high, practices thrift the cost, compact structure. Meanwhile, in the opening or closing process of the ball valve, the valve ball is separated from the sealing ring, so that strong friction between the sealing ring and the surface of the valve ball is avoided, the abrasion of the sealing ring is reduced, the service life of the valve is prolonged, and the failure rate of the ball valve is reduced.
Drawings
Fig. 1 is a schematic structural view of a hydraulic drive ball valve with a back pressure unloading device in the embodiment of the present invention;
FIG. 2 is a schematic structural view of a valve seat according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a driving piston according to an embodiment of the present invention;
fig. 4 is a top view of the drive piston in an embodiment of the invention;
fig. 5 is a schematic structural diagram of a piston cylinder in an embodiment of the present invention;
fig. 6 is a left side view of a piston cylinder in an embodiment of the present invention;
fig. 7 is a schematic structural view of a driving rod according to an embodiment of the present invention;
in the figure: 1. a valve ball; 2. a valve seat; 21. an outer annular surface of the valve seat; 210. a valve seat front end; 220. a valve seat rear end; 3. a drive assembly; 31. a drive piston; 311. a square through hole; 32. a piston cylinder; 321. a first sealed chamber; 322. an oil hole; 33. an end cap; 34. a drive rod; 341. a sphere; 4. a valve body; 41. the inner hole surface of the valve body; 42. mounting holes; 5. a seal ring; 6. a return spring; 7. a bidirectional hydraulic cylinder; 71. a bi-directional piston; 711. a piston head; 712. a piston rod; 72. a cylinder block; 721. a second sealed chamber; 722. a third sealed chamber; 8. a shuttle valve; 100. a front cavity; 200. a rear cavity.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present invention provides a hydraulic drive ball valve with a back pressure unloading device, including: a valve ball 1, a valve seat 2, a drive assembly 3 and a valve body 4.
The valve ball 1 and the valve seat 2 are positioned in the valve body 4, and the valve seat 2 is in sliding sealing fit with the valve body 4. Specifically, referring to fig. 1 and 2, the valve seat 2 is a ring-shaped structure having a valve seat outer annular surface 21, and the valve body 4 has a valve body inner bore surface 41, and the valve body inner bore surface 41 is in sliding sealing engagement with the valve seat outer annular surface 21. The valve seat 2 comprises a valve seat front end 210 far away from the valve ball 1 and a valve seat rear end 220 close to the valve ball 1, a sealing ring 5 matched with the valve ball 1 is arranged on the valve seat rear end, and the sealing ring 5 divides the inner cavity of the valve body 4 into a front cavity 100 and a rear cavity 200.
Referring to fig. 1, 5 and 6, the driving assembly 3 is fixed to the valve body 4 and includes a driving piston 31, the driving piston 31 is connected to the valve seat 2, and the driving piston 31 is configured to: when the valve is opened, the driving piston 31 drives the valve seat 2 to move so as to separate the valve ball 1 from the sealing ring 5, and the front cavity 100 and the rear cavity 200 are communicated. Specifically, the driving assembly 3 further includes a piston cylinder 32, the driving piston 31 is sleeved in the piston cylinder 32 and can move along the axis of the piston cylinder 32, an end cover 33 is disposed at an end of the piston cylinder 32, a first seal cavity 321 is formed between the end cover 33 and the driving piston 31, and an oil hole 322 communicated with the first seal cavity 321 is disposed on the piston cylinder 32. The driving assembly 3 further comprises a driving rod 34, through holes are formed in the piston cylinder 32 and the valve body 4, the driving rod 34 penetrates through the through holes, and two ends of the driving rod are connected with the driving piston 31 and the valve seat 2 respectively.
Referring to fig. 1, the hydraulic drive ball valve with a back pressure unloading device according to the embodiment of the present invention further includes a bidirectional hydraulic cylinder 7 and a shuttle valve 9.
The bidirectional hydraulic oil cylinder 7 comprises a bidirectional piston 71 and an oil cylinder body 72, the bidirectional piston 71 is sleeved in the oil cylinder body 72 to slide, the bidirectional piston comprises two piston heads 711 and a piston rod 712 connected with the two piston heads 711, the two piston heads 711 and the oil cylinder body 72 form a second sealing cavity 721 and a third sealing cavity 722, the piston rod 712 is provided with a rack, the rack is connected with a gear, and the gear is connected with a valve rod of the ball valve.
The shuttle valve 8 is connected with the two-way hydraulic oil cylinder 7, the shuttle valve 8 is provided with an X port, a Y port and a Z port, the X port and the Y port are respectively communicated with the second sealing cavity 721 and the third sealing cavity 722, and the Z port is communicated with the oil hole 322.
Referring to fig. 1, the hydraulic drive ball valve with a back pressure unloading device according to the embodiment of the present invention further includes a return spring 6 disposed between the valve seat front end 210 and the valve body 4.
The utility model discloses take hydraulic drive ball valve of backpressure uninstallation device, its theory of operation as follows:
referring to fig. 1, the embodiment of the hydraulic drive ball valve with the back pressure unloading device of the present invention adopts the valve rod of the hydraulic drive ball valve to drive the valve ball 1 to rotate to open or close the valve.
Specifically, the ball valve is provided with a hydraulic pump station, in the process of opening the ball valve (assuming that a valve is opened when the gear rotates clockwise), the medium pressure of the front cavity 100 of the ball valve is P, and when the medium pressure of the rear cavity 200 is 0, the hydraulic pump station provides high-pressure oil to the second sealing cavity 721 of the bidirectional hydraulic oil cylinder 7, the X port and the Z port of the shuttle valve 8 are communicated, the high-pressure oil enters the first sealing cavity 321, the driving piston 31 is pushed to move, the driving piston 31 drives the valve seat 2 to move, so that the sealing ring 5 at the rear end 220 of the valve seat is separated from the valve ball 1, and the front cavity 100 is communicated with the rear cavity. Meanwhile, the high-pressure oil pushes the two-way piston 71 to move, the rack is driven to move, the gear rotates, the valve rod rotates, the ball valve is opened, namely in the process of opening the ball valve, the sealing ring 5 is separated from the valve ball 1, the sealing ring 5 and the valve ball 1 have no friction, the front cavity 100 is communicated with the rear cavity 200, and no pressure difference exists between two sides of the valve ball 1.
After the ball valve is completely opened, the hydraulic pump station releases pressure, the pressure of the second sealing cavity 721 and the third sealing cavity 722 is 0, the pressure of the first sealing cavity 321 is also 0, and the valve seat 2 is reset under the action of the reset spring 6.
In the process of closing the ball valve (assuming that the valve is closed when the gear rotates anticlockwise), the medium pressure of the front cavity 100 of the ball valve is equal to the medium pressure of the rear cavity 200 of the ball valve, the hydraulic pump station provides high-pressure oil to the third sealing cavity 722 of the bidirectional hydraulic oil cylinder 7, the Y port and the Z port of the shuttle valve 8 are communicated, the high-pressure oil enters the first sealing cavity 321, the driving piston 31 is pushed to move, the driving piston 31 drives the valve seat 2 to move, and the sealing ring 5 at the rear end 220 of the valve seat is separated from the valve ball 1. Namely, in the process of closing the ball valve, the sealing ring 5 is separated from the valve ball 1, and the sealing ring 5 has no friction with the valve ball 1.
After the ball valve is completely closed, the pressure of the hydraulic pump station is released, the pressure of the second sealing cavity 721 and the pressure of the third sealing cavity 722 are 0, the pressure of the first sealing cavity 321 is also 0, the valve seat 2 resets under the action of the return spring 6, and the sealing ring 5 is attached and sealed with the valve ball 1.
Compared with the prior art, the utility model discloses take hydraulic drive ball valve of backpressure uninstallation device opens the ball valve in-process, removes through 3 drive disk seats of drive assembly 2 for valve ball 1 breaks away from with the sealing ring 5 of disk seat rear end 220, and antechamber 100 switches on with back chamber 200, and pressure differential around the valve ball 1 reduces by a wide margin, reduces the ball valve and opens required moment, thereby reduces opening device's in the ball valve power parameter, has practiced thrift equipment purchasing cost, reduces the total volume and the weight of ball valve. Furthermore, the utility model discloses take hydraulic drive ball valve of backpressure uninstallation device through setting up shuttle valve 8, and hydraulic drive valve rod rotates 2 removals of in-process simultaneous drive disk seats, and one set of hydraulic means realizes two functions, and rate of equipment utilization is high, practices thrift the cost, compact structure.
Meanwhile, in the opening or closing process of the ball valve, as the valve ball 1 is separated from the sealing ring 5, the strong friction between the sealing ring 5 and the surface of the valve ball 1 is avoided, the abrasion of the sealing ring 5 is reduced, the service life of the valve is prolonged, and the failure rate of the ball valve is reduced.
As a preferred embodiment, referring to fig. 1, 2 and 7, the end of the driving rod 34 connected to the valve seat 2 is provided with an external thread, and the valve seat 2 is provided with a threaded hole matched with the external thread, so that the driving rod is convenient to detach and mount. Further, two sealing rings are arranged on the outer ring surface 21 of the valve seat and located on two sides of the threaded hole, and the medium in the valve body is prevented from entering and leaking.
As a preferred embodiment, referring to fig. 1, 3, 4 and 7, a ball 341 is disposed at one end of the driving rod 34 connected to the driving piston 31, a square through hole 311 matched with a spherical surface is disposed on the driving piston 31, and the ball 341 and the square through hole 311 can be installed at any angle, which is convenient for disassembly and installation.
As a preferred embodiment, referring to fig. 1, a mounting hole 42 is formed on the valve body 4, and the return spring 6 is sleeved in the mounting hole 42. Further, the mounting hole is a plurality of, and a plurality of mounting holes ring-shaped equipartition are on valve body 4. The return springs 6 are annularly and uniformly distributed, and the force acting on the front end 210 of the valve seat is more balanced.
As preferred embodiment, the disk seat rear end is equipped with the annular groove, and sealing ring 5 installs in the annular groove, and sealing ring 5 is pressed close to 1 side of valve ball and is the arc, and the arc structure more matches with 1 appearance of valve ball, and sealed effect is better.
The present invention is not limited to the above preferred embodiments, and any person can obtain other products in various forms without departing from the scope of the present invention, but any change in shape or structure is within the scope of protection.
Claims (10)
1. A hydraulically driven ball valve with a back pressure relief device, comprising: the valve comprises a valve ball (1), a valve seat (2), a driving assembly (3) and a valve body (4);
the valve ball (1) and the valve seat (2) are positioned in the valve body (4), the valve seat (2) is in sliding sealing fit with the valve body (4), the valve seat (2) comprises a valve seat front end (210) far away from the valve ball (1) and a valve seat rear end (220) close to the valve ball (1), a sealing ring (5) matched with the valve ball (1) is arranged on the valve seat rear end (220), and the sealing ring (5) divides an inner cavity of the valve body (4) into a front cavity (100) and a rear cavity (200);
the drive assembly (3) is fixed on the valve body (4) and comprises a drive piston (31), the drive piston (31) is connected with the valve seat (2), and the drive piston (31) is configured to: when the ball valve is opened, the driving piston (31) drives the valve seat (2) to move so as to enable the valve ball (1) to be separated from the sealing ring (5), and the front cavity (100) is communicated with the rear cavity (200).
2. A hydraulically driven ball valve with a back pressure relief device as set forth in claim 1, wherein:
the driving assembly (3) further comprises a piston cylinder (32), the driving piston (31) is sleeved in the piston cylinder (32) and can extend to the axis of the piston cylinder (32) to move, an end cover (33) is arranged at the end of the piston cylinder (32), a first sealing cavity (321) is formed between the end cover (33) and the driving piston (31), and an oil hole (322) communicated with the first sealing cavity (321) is formed in the piston cylinder (32).
3. A hydraulically actuated ball valve with a backpressure relief device as claimed in claim 2, wherein said ball valve further comprises:
the bidirectional hydraulic oil cylinder (7) comprises a bidirectional piston (71) and an oil cylinder body (72), the bidirectional piston (71) is sleeved in the oil cylinder body (72) to slide, the bidirectional piston comprises two piston heads (711) and a piston rod (712) connected with the two piston heads (711), the two piston heads (711) and the oil cylinder body (72) form a second sealing cavity (721) and a third sealing cavity (722), the piston rod (712) is provided with a rack, the rack is connected with a gear, and the gear is connected with a valve rod of the ball valve;
the shuttle valve (8) is connected with the bidirectional hydraulic oil cylinder (7), the shuttle valve (8) is provided with an X port, a Y port and a Z port, the X port and the Y port are respectively communicated with the second sealing cavity (721) and the third sealing cavity (722), and the Z port is communicated with the oil hole (322).
4. A hydraulically driven ball valve with a back pressure relief device as set forth in claim 2, wherein:
the driving assembly (3) further comprises a driving rod (34), through holes are formed in the piston cylinder (32) and the valve body (4), the driving rod (34) penetrates through the through holes, and two ends of the driving rod are connected with the driving piston (31) and the valve seat (2) respectively.
5. A hydraulically actuated ball valve with a backpressure relief device as claimed in claim 4, wherein:
the driving rod (34) and the valve seat (2) are connected to one end and are provided with external threads, and the valve seat (2) is provided with a threaded hole matched with the external threads.
6. A hydraulically actuated ball valve with a backpressure relief device as claimed in claim 4, wherein:
one end of the driving rod (34) connected with the driving piston (31) is provided with a ball body (341), and the driving piston (31) is provided with a square through hole (311) matched with the ball body (341).
7. A hydraulically driven ball valve with a back pressure relief device as set forth in claim 1, wherein:
the valve seat (2) is of an annular structure and is provided with a valve seat outer ring surface (21), the valve body (4) is provided with a valve body inner hole surface (41), and the valve body inner hole surface (41) is in sliding sealing fit with the valve seat outer ring surface (21).
8. A hydraulically actuated ball valve with a backpressure relief device as claimed in claim 1, wherein said ball valve further comprises: and the return spring (6) is arranged between the front end (210) of the valve seat and the valve body (4).
9. A hydraulically driven ball valve with a backpressure relief device as claimed in claim 8, wherein: be equipped with mounting hole (42) on valve body (4), reset spring (6) cover is located in mounting hole (42), mounting hole (42) are a plurality of, and are a plurality of mounting hole (42) annular equipartition is in on valve body (4).
10. A hydraulically driven ball valve with a back pressure relief device as set forth in claim 1, wherein:
the valve seat is characterized in that an annular groove is formed in the rear end (220) of the valve seat, the sealing ring (5) is installed in the annular groove, and the sealing ring (5) is pressed close to the side of the valve ball (1) and is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128994.6U CN211550600U (en) | 2019-11-29 | 2019-11-29 | Hydraulic drive ball valve with backpressure unloading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128994.6U CN211550600U (en) | 2019-11-29 | 2019-11-29 | Hydraulic drive ball valve with backpressure unloading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211550600U true CN211550600U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922128994.6U Expired - Fee Related CN211550600U (en) | 2019-11-29 | 2019-11-29 | Hydraulic drive ball valve with backpressure unloading device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211550600U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822119A (en) * | 2019-11-29 | 2020-02-21 | 中国船舶重工集团公司第七一九研究所 | Hydraulic drive ball valve with backpressure unloading device |
| CN112879634A (en) * | 2021-02-09 | 2021-06-01 | 国家石油天然气管网集团有限公司华南分公司 | Blade motor direct-drive and manual double-control electromagnetic pilot type Y-shaped water hammer relief valve |
-
2019
- 2019-11-29 CN CN201922128994.6U patent/CN211550600U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822119A (en) * | 2019-11-29 | 2020-02-21 | 中国船舶重工集团公司第七一九研究所 | Hydraulic drive ball valve with backpressure unloading device |
| CN110822119B (en) * | 2019-11-29 | 2024-05-28 | 中国船舶重工集团公司第七一九研究所 | Hydraulic drive ball valve with back pressure unloading device |
| CN112879634A (en) * | 2021-02-09 | 2021-06-01 | 国家石油天然气管网集团有限公司华南分公司 | Blade motor direct-drive and manual double-control electromagnetic pilot type Y-shaped water hammer relief valve |
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| Date | Code | Title | Description |
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| 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: 20200922 Termination date: 20211129 |