Mechanical unlocking device for ball valve action

Abstract

The utility model discloses a ball valve action mechanical unlocking device which comprises a valve body and an oil cylinder, a valve element is rotatably arranged in the valve body, a moving ring matched with the valve element is arranged in the valve body in a sliding mode, a push rod extending out of the valve body is fixed on the moving ring, the push rod is connected with the valve body in a sliding mode, and the oil cylinder is connected with the valve body in a sliding mode. A control device is arranged at the end, away from the movable ring, of the push rod, and the movable ring is matched with the control device after leaving the valve element to control the oil cylinder to drive the valve element to rotate. Compared with the prior art, the movable ring can touch the control device only after moving in place, and then the control device controls the oil cylinder to open the valve, so that the valve opening sequence is correct, and the movable ring is prevented from being abraded due to the fact that the valve is opened by mistake. The overall structure is simple and easy to implement.

Description

Technical Field

[0001] This utility model relates to the field of ball valve sealing technology, and in particular to a mechanical unlocking device for ball valve operation. Background Technology

[0002] In large-diameter ball valves, the moving ring presses against the valve core through axial reciprocating motion, causing radial deformation and achieving a tight fit with the valve core surface, thus closing the valve. When the ball valve opens, if the moving ring is pressed tightly against the valve core, the rotation of the valve core can easily wear down the moving ring. Therefore, when opening the ball valve, the moving ring needs to be moved backward to separate it from the valve core before the valve core can rotate to complete the opening action. Relying on manual memorization of operating procedures to control the movement of the moving ring and the rotation of the valve core could lead to misoperation. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] Based on this, this utility model proposes a mechanical unlocking device for ball valve operation to ensure that the valve core rotates to open the valve only after the moving ring moves backward.

[0005] (II) Technical Solution

[0006] To overcome or at least partially solve the above problems, this utility model provides a mechanical unlocking device for ball valve operation, including a valve body and a cylinder. A valve core is rotatably disposed inside the valve body, and a movable ring that cooperates with the valve core is slidably disposed inside the valve body. A push rod extending out of the valve body is fixed on the movable ring, and the push rod is slidably connected to the valve body. A control device is provided at the end of the push rod away from the movable ring. After the movable ring leaves the valve core, it cooperates with the control device to control the cylinder to drive the valve core to rotate.

[0007] Preferably, a first oil chamber and a second oil chamber are provided between the valve body and the moving ring, the second oil chamber being located behind the moving ring, a plurality of first seals are provided between the moving ring and the valve body, the push rod is threadedly connected to the moving ring, and a plurality of second seals are provided between the push rod and the valve body.

[0008] Preferably, the valve body includes: a housing, a support ring, and an end cap, the support ring being disposed between the housing and the end cap, the push rod including a rod and a piston, the piston being slidably connected to the support ring, one end of the piston being threadedly connected to a movable ring, and the other end being threadedly connected to the rod.

[0009] Preferably, a first sliding sleeve is slidably disposed inside the support ring, a second sliding sleeve is slidably disposed inside the end cap, the piston is slidably disposed inside the first sliding sleeve, and a portion of the rod is slidably disposed inside the second sliding sleeve.

[0010] Preferably, a third sealing element is provided between the first sliding sleeve and the support ring.

[0011] Preferably, a fourth sealing element is provided between the second sliding sleeve and the end cap.

[0012] Preferably, the rod is a telescopic rod.

[0013] Preferably, the rod body includes a rod body and an adjusting rod, the rear end of the rod body is slidably disposed in the adjusting rod, and the rear end of the rod body is threadedly connected to an adjusting nut that cooperates with the adjusting rod.

[0014] Preferably, the control device is a two-position four-way directional valve with a cam.

[0015] Preferably, the rear end of the adjusting rod is provided with a positioning groove that cooperates with the cam.

[0016] (III) Beneficial Effects

[0017] The mechanical unlocking device for ball valve operation of this utility model has the following advantages:

[0018] In this invention, the moving ring only contacts the control device after it has moved into position, and then the control device controls the hydraulic cylinder to open the valve, thus ensuring the correct valve opening sequence and preventing accidental valve opening that could wear down the moving ring. The overall structure is simple and easy to implement. Attached Figure Description

[0019] The features and advantages of this utility model will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as limiting the utility model in any way. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a partial structural schematic diagram of the present invention;

[0022] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point A in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Valve body, 2. Oil cylinder, 3. Valve core, 4. Moving ring, 5. Push rod, 6. Control device, 7. First oil chamber, 8. Second oil chamber, 9. First seal, 10. Second seal, 11. Third seal, 12. Fourth seal, 011. Housing, 012. Support ring, 013. End cap, 014. First sliding sleeve, 015. Second sliding sleeve, 051. Rod body, 052. Piston, 0511. Rod body, 0512. Adjusting rod, 0513. Adjusting nut, 61. Cam, 100. Positioning groove. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] See attached document Figure 2 This embodiment provides a mechanical unlocking device for ball valve operation, including a valve body 1 and a cylinder 2. A valve core 3 is rotatably disposed inside the valve body 1, and a movable ring 4 that cooperates with the valve core 3 is slidably disposed inside the valve body 1. A push rod 5 is fixed on the movable ring 4. The front end of the push rod 5 slides inside the valve body 1, and the rear end of the push rod 5 extends out of the valve body 1. A control device 6 is disposed behind the push rod 5. The push rod 5 is slidably connected to the valve body 1. After the movable ring 4 leaves the valve core 3, it cooperates with the control device 6 to control the cylinder 2 to drive the valve core 3 to rotate. Specifically, refer to the appendix. Figure 1 A rotating shaft is rotatably mounted on the valve body 1, and the rotating shaft is fixedly connected to the valve core 3. The lower end of the hydraulic cylinder 2 is hinged to the base plate, and the other end (piston rod) of the hydraulic cylinder 2 is hinged to the support arm. The end of the support arm away from the hydraulic cylinder 2 is fixed to the rotating shaft. The extension and retraction of the piston rod of the hydraulic cylinder 2 drives the support arm to rotate around the axis of the rotating shaft, thereby driving the rotating shaft to rotate. The rotation of the rotating shaft drives the valve core 3 to rotate within the valve body 1, thus completing the valve opening and closing actions. In this invention, when the moving ring 4 moves backward to the position of the control device 6, the moving ring 4 separates from the valve core 3. After being triggered by the moving ring 4, the control device 6 controls the hydraulic cylinder 2 to start. The extension and retraction of the piston rod of the hydraulic cylinder 2 drives the valve core 3 to rotate, completing the ball valve opening action. This invention controls the rotation of the valve core 3 through the stroke of the moving ring 4, ensuring the correct valve opening sequence. The overall structure is simple and easy to implement.

[0027] In another embodiment of this utility model: a first oil chamber 7 and a second oil chamber 8 are provided between the valve body 1 and the moving ring 4. The second oil chamber 8 is located behind the moving ring 4. Oil entering the second oil chamber 8 pushes the moving ring 4 forward to fit tightly against the valve core 3. Oil entering the first oil chamber 7 pushes the moving ring 4 backward to separate from the valve core 3. Multiple first sealing elements 9 are provided between the moving ring 4 and the valve body 1. The push rod 5 is threadedly connected to the moving ring 4. Multiple second sealing elements 10 are provided between the push rod 5 and the valve body 1. The push rod 5 and the moving ring 4 have a detachable connection structure, which facilitates the installation and removal of the push rod 5 and the moving ring 4 within the valve body 1.

[0028] As another embodiment of this utility model: refer to the appendix Figure 3The valve body 1 includes a housing 011, a support ring 012, and an end cap 013. The support ring 012 is located between the housing 011 and the end cap 013. A movable ring 4 is slidably disposed between the housing 011 and the support ring 012. The push rod 5 includes a rod body 051 and a piston 052. The piston 052 is slidably connected to the support ring 012. One end of the piston 052 is threadedly connected to the movable ring 4, and the other end is threadedly connected to the rod body 051. The split design of the valve body 1 facilitates the disassembly and assembly of the movable ring 4 and the push rod 5, and the split design of the push rod 5 further facilitates its disassembly and assembly.

[0029] Specifically, the end cap 013 is fixed to the support ring 012 by bolts, and the support ring 012 is fixed to the housing 01 by bolts.

[0030] In another embodiment of this utility model: a first sliding sleeve 014 is slidably disposed within the support ring 012, a second sliding sleeve 015 is slidably disposed within the end cap 013, the piston 052 is slidably disposed within the first sliding sleeve 014, and a portion of the rod 051 is slidably disposed within the second sliding sleeve 015. With this structural design, when maintenance is required, only the corresponding parts need to be replaced, without needing to replace the entire support ring 012 and end cap 013.

[0031] Specifically, the outer diameter of the rear end of the first sliding sleeve 014 is larger than the outer diameter of the front end, and the outer diameter of the front end of the second sliding sleeve 015 is larger than the outer diameter of the rear end. The rear end of the first sliding sleeve 014 is flush with the rear end of the support ring 012, and the front end of the second sliding sleeve 015 is flush with the front end of the end cap 013.

[0032] As another embodiment of the present invention: a third sealing element 11 is provided between the first sliding sleeve 014 and the support ring 012 to prevent oil in the second oil chamber 8 from leaking between the first sliding sleeve 014 and the support ring 012.

[0033] As another embodiment of the present invention: a fourth sealing element 12 is provided between the second sliding sleeve 015 and the end cover 013 to prevent external dust from entering between the second sliding sleeve 015 and the end cover 013.

[0034] As another embodiment of this utility model: the rod 051 is a telescopic rod, and the telescopic rod is set to facilitate the adjustment of the distance between the rod 051 and the control device 6.

[0035] One embodiment of the telescopic pole: The pole body 051 includes a pole body 0511 and an adjusting rod 0512. The rear end of the pole body 0511 is slidably disposed within the adjusting rod 0512, and an adjusting nut 0513 that mates with the adjusting rod 0512 is threadedly connected to the rear end of the pole body 0511. In this structural design, rotating the adjusting nut 0513 causes the adjusting nut 0513 to push the adjusting rod 0512 to slide on the pole body 0511, thereby adjusting the length of the pole body 051.

[0036] Another implementation of the telescopic rod: the adjusting rod 0512 is threadedly connected to the rod body 0511, and the length of the rod body 051 is adjusted by rotating the adjusting rod 0512.

[0037] One embodiment of the control device 6: The control device 6 is a two-position four-way directional valve with a cam 61, which is existing technology. The two-position four-way directional valve with a cam 61 is installed in the control oil circuit of the cylinder 2. Before the rod 051 of the moving ring 4 contacts the control device 6, the two-position four-way directional valve will cut off the hydraulic oil circuit for opening the ball valve.

[0038] Another implementation of control device 6: Control device 6 is a two-position four-way solenoid directional valve, which is energized and de-energized by the rod 051 touching the two-position four-way solenoid directional valve. The two-position four-way solenoid directional valve is installed in the control oil circuit of the oil cylinder 2.

[0039] As another embodiment of this utility model: the rear end of the adjusting rod 0512 is provided with a positioning groove 100 that cooperates with the cam 61.

[0040] Finally, the method of this utility model is only a preferred embodiment and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

[0041] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A mechanical ball valve actuation unlocking device, characterized in that, The valve body is provided with a valve core rotating therein, and a moving ring slidingly arranged in the valve body and cooperating with the valve core, the moving ring is fixed with a push rod extending out of the valve body, the push rod is slidingly connected with the valve body, and the push rod is provided with a control device at an end away from the moving ring, the moving ring is cooperated with the control device after moving away from the valve core to control the valve core to rotate driven by the oil cylinder.

2. A mechanical ball valve actuation unlocking device according to claim 1, characterized in that, The valve body and the moving ring are provided with a first oil cavity and a second oil cavity, the second oil cavity is located at a rear of the moving ring, a plurality of first sealing members are arranged between the moving ring and the valve body, the push rod is threadedly connected with the moving ring, and a plurality of second sealing members are arranged between the push rod and the valve body.

3. A mechanical ball valve actuation unlocking device according to claim 2, characterized in that, The valve body comprises a shell, a support ring and an end cover, the support ring is arranged between the shell and the end cover, the push rod comprises a rod body and a piston, the piston is slidingly connected with the support ring, one end of the piston is threadedly connected with the moving ring, and the other end of the piston is threadedly connected with the rod body.

4. A mechanical ball valve actuation unlocking device according to claim 3, characterized in that, The first sliding sleeve is slidingly arranged in the support ring, the second sliding sleeve is slidingly arranged in the end cover, the piston is slidingly arranged in the first sliding sleeve, and part of the rod body is slidingly arranged in the second sliding sleeve.

5. A mechanical ball valve actuation unlocking device according to claim 4, characterized in that, The third sealing member is arranged between the first sliding sleeve and the support ring.

6. A mechanical ball valve actuation unlocking device according to claim 5, characterized in that The fourth sealing member is arranged between the second sliding sleeve and the end cover.

7. A mechanical ball valve actuation unlocking device according to claim 3, characterized in that, The rod body is a telescopic rod.

8. A mechanical ball valve actuation unlocking device according to claim 7, characterized in that, The rod body comprises a rod main body and an adjusting rod, the rear end of the rod main body is slidingly arranged in the adjusting rod, and the rear end of the rod main body is threadedly connected with an adjusting nut cooperating with the adjusting rod.

9. A mechanical ball valve actuation unlocking device according to claim 8, characterized in that, The control device is a two-position four-way reversing valve with a cam.

10. A mechanical ball valve actuation unlocking device according to claim 9, characterized in that, The rear end of the adjusting rod is provided with a positioning groove cooperating with the cam.

Images