Mechanical unlocking device for action of ball valve moving ring

Abstract

The utility model discloses a mechanical unlocking device for the action of a ball valve moving ring, which comprises a valve body and an oil cylinder, a rotating shaft is rotatably arranged on the valve body, the rotating shaft is fixedly connected with a valve core in the valve body, a support arm is fixed on the rotating shaft outside the valve body, and two ends of the oil cylinder are respectively hinged with the support arm and a bottom plate. A control device and a collision block are arranged between a piston rod of the oil cylinder and a cylinder body, a movable ring is arranged in the valve body in a sliding mode, and the piston rod retracts backwards to drive the collision block to be matched with the control device so as to control the movable ring to move forwards to seal the valve element. Compared with the prior art, the collision block can touch the control device only after the valve element rotates in place, and then the control device triggers the moving ring to move forwards to be sealed with the valve element, so that the valve closing sequence is correct, and the moving ring is prevented from being abraded by mistaken valve closing. The overall structure is simple and easy to implement.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve sealing technical field especially is related to a ball valve moving ring action's mechanical unlocking device. BACKGROUND

[0002] The moving ring of large-diameter ball valve extrudes the valve core through axial reciprocating movement, produces radial deformation, realizes close adhesion with the surface of valve core, thereby completes ball valve closing. When the ball valve is closed, if the moving ring moves forward first, the valve core rotates to seal against the moving ring, the rotation of valve core can easily wear the moving ring. Therefore, when the ball valve is closed, the valve core needs to be rotated to the closed position first, and then the moving ring moves forward to seal against the valve core to complete the closing action. If the operation steps are controlled by artificial memory to control the movement of moving ring and the rotation of valve core, there can be misoperation. SUMMARY

[0003] (I) Technical problem to be solved

[0004] Therefore, the utility model provides a ball valve moving ring action's mechanical unlocking device to ensure that the valve core rotates and then the moving ring can move forward without error.

[0005] (II) Technical scheme

[0006] The utility model discloses a ball valve moving ring action's mechanical unlocking device to overcome above -mentioned problem or at least partially solve above -mentioned problem provides, including valve body and oil cylinder, the valve body is rotationally arranged with the pivot, the pivot is fixedly connected with the valve core in the valve body, the pivot is fixed with the support arm outside the valve body, and the both ends of oil cylinder are hinged with support arm and bottom plate respectively, and the piston rod of oil cylinder is equipped with control device and the ram between cylinder body, the valve body is slidably arranged with the moving ring, and the piston rod is retracted behind and drives the ram to cooperate with control device, to control the moving ring and move forward and seal the valve core.

[0007] Preferably, the piston rod is fixed with the sleeve, the end of the ram away from the control device is slidably arranged in the sleeve, and the elastic element is arranged between the bottom of the sleeve and the ram.

[0008] Preferably, the sleeve is screw-connected with the adjusting rod, and the elastic element is arranged between the adjusting rod and the ram.

[0009] Preferably, the end of the sleeve away from the control device is fixed with the first nut, and the adjusting rod is screw-connected with the first nut.

[0010] Preferably, the sleeve is fixed with the ear ring of the piston rod through the L-shaped plate, the L-shaped plate is fixed with the second nut, and the sleeve is screw-connected with the second nut.

[0011] Preferably, the elastic element is a spring, and both the impact block and the adjusting rod are provided with limiting grooves adapted to the spring.

[0012] Preferably, the end of the adjusting rod away from the impact block is provided with a handle, and the handle is provided with anti-slip texture.

[0013] Preferably, the support arm has an arc-shaped structure.

[0014] Preferably, a first oil chamber and a second oil chamber are provided between the valve body and the moving ring, and a plurality of first sealing elements are provided between the moving ring and the valve body. The first oil chamber is connected to a first oil hole on the valve body, and the second oil chamber is connected to a second oil hole on the valve body.

[0015] Preferably, the control device is a two-position four-way directional valve with a cam.

[0016] (III) Beneficial Effects

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

[0018] In this invention, the striking block only contacts the control device after the valve core has rotated to its designated position. The control device then triggers the moving ring to move forward and seal with the valve core, ensuring the correct valve closing sequence and preventing accidental valve closure 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 This is a schematic diagram of the structure of the movable ring of this utility model;

[0023] Figure 4 This is a cross-sectional schematic diagram of the contact block assembly of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. valve body, 2. oil cylinder, 3. rotating shaft, 4. valve core, 5. support arm, 6. bottom plate, 7. control device, 8. bump block assembly, 9. moving ring, 21. piston rod, 22. cylinder body, 23. ear ring, 81. bump block, 82. sleeve, 83. elastic piece, 84. adjusting rod, 85. first nut, 86. L-shaped plate, 87. second nut, 88. handle, 100. first oil cavity, 200. second oil cavity, 300. first sealing piece. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0027] Referring to the drawings Figure 1 and the drawings Figure 3 , the embodiment provides a mechanical unlocking device for ball valve moving ring action, which comprises a valve body 1 and an oil cylinder 2, a rotating shaft 3 is rotationally arranged on the valve body 1, the rotating shaft 3 is fixedly connected with a valve core 4 in the valve body 1, a support arm 5 is fixedly arranged on the rotating shaft 3 outside the valve body 1, the two ends of the oil cylinder 2 are hingedly connected with the support arm 5 and a bottom plate 6 respectively, a control device 7 and a bump block 81 are arranged between a piston rod 21 and a cylinder body 22 of the oil cylinder 2, one of the control device 7 and the bump block 81 is fixed on the piston rod 21, and the other is fixed on the cylinder body 22, then the distance between the bump block 81 and the control device 7 is adjusted through the extension and retraction of the piston rod 21, a moving ring 9 is slidably arranged in the valve body 1, the piston rod 21 is retracted backward to drive the bump block 81 to cooperate with the control device 7, so as to control the moving ring 9 to move forward to seal the valve core 4. In the utility model, when the ball valve is opened, the piston rod 21 of the oil cylinder 2 is in the extended state, the valve core 4 is in the open position, and the moving ring 9 is separated from the valve core 4, at this time, the control device 7 controls the moving ring 9 to be unable to act. When the valve needs to be closed, the piston rod 21 of the oil cylinder 2 is retracted to drive the valve core 4 to rotate through the support arm 5, and also drive the bump block 81 to move close to the control device 7, when the valve core 4 rotates to the closed position, the bump block 81 triggers the control device 7. The control device 7 controls the moving ring 9 to move forward to press the valve core 4, and the ball valve closing is completed. In the utility model, the piston rod 21 drives the valve core 4 to rotate and the bump block 81 to move at the same time, only when the valve core 4 rotates to the right position, the bump block 81 triggers the control device 7 to control the moving ring 9 to move forward, so as to ensure the correctness of the closing sequence. The overall structure is simple and easy to implement.

[0028] Specifically, the cylinder body 22 of the oil cylinder 2 is hingedly connected with the bottom plate 6.

[0029] As another embodiment of the utility model, refer to the accompanying drawings Figure 2 The sleeve 82 is fixed on the piston rod 21, and the end of the impact block 81 away from the control device 7 is slidably arranged in the sleeve 82; the bottom of the sleeve 82 is provided with an elastic element 83 between the sleeve 82 and the impact block 81. The ball valve has a large caliber, and the valve core 4 is also large; when the piston rod 21 is retracted backward, the impact force is large; when the impact block 81 touches the control device 7, the elastic element 83 can be buffered, so that the control device 7 is not damaged by the impact.

[0030] As another embodiment of the utility model, refer to the accompanying drawings Figure 4 The sleeve 82 is fixed on the piston rod 21, and the end of the impact block 81 away from the control device 7 is slidably arranged in the sleeve 82; the bottom of the sleeve 82 is provided with an elastic element 83 between the sleeve 82 and the impact block 81. The ball valve has a large caliber, and the valve core 4 is also large; when the piston rod 21 is retracted backward, the impact force is large; when the impact block 81 touches the control device 7, the elastic element 83 can be buffered, so that the control device 7 is not damaged by the impact.

[0031] As another embodiment of the utility model, the first nut 85 is fixed at the end of the sleeve 82 away from the control device 7, the adjusting rod 84 is threadedly connected with the first nut 85, and the adjusting rod 84 is slidably connected with the sleeve 82.

[0032] As another embodiment of the utility model, the sleeve 82 is fixed on the ear ring 23 of the piston rod 21 through the L-shaped plate 86, the ear ring 23 is fixed at the front end of the piston rod 21, the second nut 87 is fixed on the L-shaped plate 86, and the sleeve 82 is threadedly connected with the second nut 87. The sleeve 82 is fixed on the L-shaped plate 86 through the second nut 87, the distance between the sleeve 82 and the control device 7 is adjusted by rotating the sleeve 82, and the distance between the impact block 81 and the control device 7 is adjusted.

[0033] Specifically, the L-shaped plate 86 is fixed on the ear ring 23 through bolts.

[0034] As another embodiment of the utility model, the elastic element 83 is a spring, the impact block 81 and the adjusting rod 84 are each provided with a limiting groove matched with the spring, and the two ends of the spring are respectively inserted into the two limiting grooves.

[0035] As another embodiment of the utility model, the end of the adjusting rod 84 away from the impact block 81 is provided with a handle 88, and the handle 88 is provided with anti-skid lines, so that the adjusting rod 84 is conveniently rotated. The impact block 81, the sleeve 82, the elastic element 83, the adjusting rod 84, the first nut 85, the L-shaped plate 86, the second nut 87 and the handle 88 form an impact block assembly.

[0036] Specifically, the supporting arm 5 is in an arc structure.

[0037] One embodiment of the supporting arm 5: the supporting arm 5 comprises two supporting plates, the two supporting plates are respectively arranged on the two sides of the ear ring 23, a hinge shaft penetrates through the supporting plate and the ear ring 23, and the supporting plate rotates around the hinge shaft.

[0038] As another embodiment of the present application: the valve body 1 and the moving ring 9 are provided with a first oil cavity 100 and a second oil cavity 200, the moving ring 9 and the valve body 1 are provided with a plurality of first sealing members 300, the first oil cavity 100 is communicated with the first oil hole on the valve body 1, and the second oil cavity 200 is communicated with the second oil hole on the valve body 1. When the valve core 4 rotates to the closed position, the control device 7 makes the hydraulic oil enter the second oil cavity 200 along the second oil hole to push the moving ring 9 to move forward (away from the direction of the valve core 4), and the ball valve closing action is completed.

[0039] An embodiment of the control device 7: the control device 7 is a two-position four-way reversing valve with a cam. The two-position four-way reversing valve with a cam is prior art. The two-position four-way reversing valve with a cam is installed on the control oil way of the moving ring 9. Before the striker 81 does not contact the control device 7, the two-position four-way reversing valve will cut off the hydraulic oil way of the second oil cavity 200 of the moving ring 9.

[0040] Finally, the method of the present application is only a preferred embodiment, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0041] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes shall fall within the scope defined by the appended claims.

Claims

1. A mechanical unlocking device for the movement of a ball valve moving ring, characterized in that, The device includes a valve body and a hydraulic cylinder. A rotating shaft is rotatably mounted on the valve body and is fixedly connected to the valve core inside the valve body. A support arm is fixed to the rotating shaft outside the valve body. The two ends of the hydraulic cylinder are respectively hinged to the support arm and the base plate. A control device and a stop block are provided between the piston rod of the hydraulic cylinder and the cylinder body. A moving ring is slidably mounted inside the valve body. When the piston rod retracts backward, it drives the stop block to cooperate with the control device to control the moving ring to move forward and seal the valve core.

2. The mechanical unlocking device for the movement of the ball valve moving ring according to claim 1, characterized in that, A sleeve is fixed on the piston rod, and the end of the impact block away from the control device is slidably disposed inside the sleeve. An elastic element is provided between the bottom of the sleeve and the impact block.

3. The mechanical unlocking device for the movement of the ball valve moving ring according to claim 2, characterized in that, An adjusting rod is threaded onto the sleeve, and the elastic element is located between the adjusting rod and the impact block.

4. The mechanical unlocking device for the movement of the ball valve moving ring according to claim 3, characterized in that, The end of the sleeve furthest from the control device is fixed with a first nut, and the adjusting rod is threadedly connected to the first nut.

5. The mechanical unlocking device for the movement of the ball valve moving ring according to claim 4, characterized in that, The sleeve is fixed to the piston rod by an ear ring on an L-shaped plate. A second nut is fixed on the L-shaped plate, and the sleeve is threadedly connected to the second nut.

6. The mechanical unlocking device for the movement of the ball valve moving ring according to claim 5, characterized in that, The elastic element is a spring, and both the impact block and the adjusting rod are provided with limiting grooves that are adapted to the spring.

7. The mechanical unlocking device for the movement of the ball valve moving ring according to claim 6, characterized in that, The end of the adjusting rod away from the impact block is provided with a handle, and the handle is provided with anti-slip texture.

8. The mechanical unlocking device for the movement of the ball valve moving ring according to claim 1, characterized in that, The support arm has an arc-shaped structure.

9. The mechanical unlocking device for the movement of the ball valve moving ring according to claim 1, characterized in that, A first oil chamber and a second oil chamber are provided between the valve body and the moving ring. A plurality of first sealing elements are provided between the moving ring and the valve body. The first oil chamber is connected to a first oil hole on the valve body, and the second oil chamber is connected to a second oil hole on the valve body.

10. The mechanical unlocking device for the movement of the ball valve moving ring according to claim 1, characterized in that, The control device is a two-position four-way directional valve with a cam.

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