Leakage detection device for ball valve moving ring

Abstract

The utility model discloses a leak detection device for a ball valve moving ring, which comprises the moving ring arranged in a valve body in a sliding manner, a first oil cavity is arranged on the outer side of the moving ring, a second oil cavity is arranged at the rear end of the moving ring, two first sealing elements are arranged between the first oil cavity and a channel in the valve body, and a second sealing element is arranged between the second oil cavity and the channel in the valve body. Two first sealing pieces are arranged between the first oil cavity and the valve body, two second sealing pieces are arranged between the second oil cavity and the valve body inner channel, a first liquid collecting groove is formed in the valve body between the two first sealing pieces, a second liquid collecting groove is formed in the valve body between the two second sealing pieces, and the first liquid collecting groove is communicated with a first leakage detecting hole in the valve body. And the second liquid collecting tank is communicated with a second leak detection hole in the valve body. Compared with the prior art, the sealing device is simple in structure and capable of judging the fault position in time and preventing the water and oil mixing phenomenon under the abnormal sealing condition.

Description

Technical Field

[0001] This utility model relates to the field of ball valve sealing technology, and in particular to a leak detection device for a ball valve moving ring. Background Technology

[0002] In large-diameter ball valves, the moving ring compresses the valve core through axial reciprocating motion, causing radial deformation and achieving a tight fit with the valve core surface. To achieve a seal, a sealing ring is placed between the moving ring and the valve body. However, during the movement of the moving ring, the sealing ring wears down, and prolonged operation leads to aging. These factors can cause the sealing ring to fail, and if not replaced in time, water or oil leakage can occur. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] Based on this, this utility model proposes a leak detection device for the moving ring of a ball valve, in order to solve the problem that existing sealing devices cannot detect failure in time and will cause water and oil leakage.

[0005] (II) Technical Solution

[0006] To overcome or at least partially solve the above problems, this utility model provides a leak detection device for a ball valve moving ring, comprising a moving ring slidably disposed within the valve body, a first oil chamber on the outer side of the moving ring, a second oil chamber at the rear end of the moving ring, two first sealing elements between the first oil chamber and the internal channel of the valve body, two second sealing elements between the second oil chamber and the internal channel of the valve body, a first liquid collection groove on the valve body between the two first sealing elements, a second liquid collection groove on the valve body between the two second sealing elements, the first liquid collection groove communicating with a first leak detection hole on the valve body, and the second liquid collection groove communicating with a second leak detection hole on the valve body.

[0007] Preferably, the outlets of both the first and second leak detection holes face downwards.

[0008] Preferably, the first leak detection holes are vertically distributed.

[0009] Preferably, the first leak detection hole is divided into multiple segments from top to bottom, and the diameter of the first leak detection hole in the upper segment is smaller than that in the lower segment.

[0010] Preferably, the diameter of the top of the first leak detection hole is smaller than the width of the opening of the first liquid collection tank.

[0011] Preferably, the second leak detection hole includes: a horizontal pipe, a first vertical pipe, and a second vertical pipe, one end of the horizontal pipe being connected to the second liquid collection tank through the first vertical pipe, and the other end being connected to the second vertical pipe.

[0012] Preferably, the second vertical pipe is divided into multiple segments from top to bottom, and the diameter of the second vertical pipe in the upper segment is smaller than that in the lower segment.

[0013] Preferably, the moving ring has an L-shaped structure, the first oil chamber is located at the corner of the moving ring, the first oil chamber is connected to the first oil hole on the valve body, and the second oil chamber is connected to the second oil hole on the valve body.

[0014] Preferably, a third sealing element is provided on the movable ring between the first oil chamber and the second oil chamber.

[0015] Preferably, the valve body includes a housing and a support ring, the movable ring is slidably disposed between the housing and the support ring, the support ring is fixed to the housing by bolts, and the first liquid collection tank and the second liquid collection tank are respectively disposed on the housing and the support ring.

[0016] (III) Beneficial Effects

[0017] The leak detection device for the ball valve moving ring of this utility model has the following advantages:

[0018] This utility model has a simple structure. By setting a first liquid collection tank, a first leak detection hole, and two first sealing elements, the first oil chamber and the channel are isolated under normal sealing conditions. In case of abnormal sealing, the fault location can be determined in time and water and oil cross-contamination can be prevented. By setting a second liquid collection tank, a second leak detection hole, and two second sealing elements, the second oil chamber and the channel are isolated under normal sealing conditions. In case of abnormal sealing, the fault location can be determined in time and water and oil cross-contamination can be prevented. 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 for Figure 1 An enlarged schematic diagram of the structure at point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Valve body, 2. Moving ring, 3. First oil chamber, 4. Second oil chamber, 5. Channel, 6. First seal, 7. Second seal, 8. First collection tank, 9. Second collection tank, 10. First leak detection hole, 11. Second leak detection hole, 12. Third seal, 13. Valve core, 01. Horizontal pipe, 02. First vertical pipe, 03. Second vertical pipe, 04. Outer shell, 05. Support ring. Detailed Implementation

[0024] 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.

[0025] See attached document Figure 1 and attached Figure 2This embodiment provides a leak detection device for a ball valve moving ring, including a moving ring 2 slidably disposed in the valve body 1. A first oil chamber 3 is provided on the outer side of the moving ring 2. Oil enters the first oil chamber 3 and pushes the moving ring 2 to move backward, thereby separating the moving ring 2 from the valve core 13. A second oil chamber 4 is provided at the rear end of the moving ring 2. Oil enters the second oil chamber 4 and pushes the moving ring 2 to move forward, thereby making the moving ring 2 contact the valve core 13 and squeeze to seal, thus closing the valve. Two first seals 6 are provided between the first oil chamber 3 and the inner channel 5 of the valve body 1. The first seals 6 are located between the valve body 1 and the moving ring 2. Water flows through the channel 5. The first seals 6 are used to isolate the water in the channel 5 and the oil in the first oil chamber 3 to prevent them from mixing. Two second seals 7 are provided between the second oil chamber 4 and the inner channel 5 of the valve body 1. The second seals 7 are located between the valve body 1 and the moving ring 2. The second seals 7 are used to isolate the water in the channel 5 and the oil in the second oil chamber 4 to prevent them from mixing. A first liquid collection groove 8 is provided on the valve body 1 between the two first seals 6. A second liquid collection groove 9 is provided on the valve body 1 between the two second seals 7. The first liquid collection groove 8 is connected to the first leak detection hole 10 on the valve body 1. The second liquid collection groove 9 is connected to the second leak detection hole 11 on the valve body 1. The first leak detection hole 10 and the second leak detection hole 11 are connected to the outside. The pressure is lower than the pressure in the channel 5 and the pressure in the oil chamber. In this invention, when the first seal 6 near the channel 5 ages or wears down, reducing its sealing performance, water from the channel 5 enters the first collection tank 8. The water in the first collection tank 8 then flows to the first leak detection hole 10, which has lower pressure. By observing the water discharged from the first leak detection hole 10, it can be determined that the first seal 6 near the channel 5 has failed. This method allows for timely replacement of the faulty first seal 6 and prevents water from the channel 5 from entering the first oil cavity 3, causing water leakage. Similarly, when the first seal 6 near the first oil cavity 3 ages or wears down, reducing its sealing performance, oil from the first oil cavity 3 enters the first collection tank 8. The oil in the first collection tank 8 then flows to the first leak detection hole 10, which has lower pressure. By observing the oil discharged from the first leak detection hole 10, it can be determined that the first seal 6 near the first oil cavity 3 has failed. This method allows for timely replacement of the faulty first seal 6 and prevents oil from the first oil cavity 3 from entering the channel 5, causing oil leakage. When both first seals 6 fail to seal, water in channel 5 and oil in the first oil chamber 3 enter the first collection tank 8 and then flow to the first leak detection hole 10, which has lower pressure. By observing the oil-water mixture discharged from the first leak detection hole 10, it can be determined that both first seals 6 have failed. This method allows for timely replacement of the faulty first seal 6 without causing water or oil leakage. Similarly, by observing the water discharged from the second leak detection hole 11, it can be determined that the second seal 7 near channel 5 has failed. This method allows for timely replacement of the faulty second seal 7 without causing water from channel 5 to enter the second oil chamber 4 and cause water leakage.By observing the oil discharged from the second leak detection hole 11, it can be determined that the second seal 7 on the side near the second oil chamber 4 has failed. This method allows for timely replacement of the faulty second seal 7 and prevents oil from entering the channel 5 and causing cross-contamination. By observing the oil-water mixture discharged from the second leak detection hole 11, it can be determined that both second seals 7 have failed. This method allows for timely replacement of the faulty second seals 7 and prevents cross-contamination of water and oil. This utility model has a simple structure. By setting two first seals 6 between the first oil chamber 3 and the channel 5, and cooperating with the first liquid collection tank 8 and the first leak detection hole 10, the fault location can be determined in time after a sealing problem occurs in the first seal 6, and cross-contamination of water or oil can be prevented after water or oil leakage. By setting two second seals 7 between the second oil chamber 4 and the channel 5, and cooperating with the second liquid collection tank 9 and the second leak detection hole 11, the fault location can be determined in time after a sealing problem occurs in the second seal 7, and cross-contamination of water or oil can be prevented after water or oil leakage.

[0026] As another embodiment of this utility model: the outlets of the first leak detection hole 10 and the second leak detection hole 11 both face downwards. This structural design facilitates the timely discharge of the medium inside the first leak detection hole 10 and the second leak detection hole 11.

[0027] As another embodiment of this utility model: the first leak detection hole 10 is vertically distributed. This structural design facilitates the timely discharge of the medium in the first liquid collection tank 8 through the first leak detection hole 10.

[0028] As another embodiment of this utility model: the first leak detection hole 10 is divided into multiple segments from top to bottom, and the diameter of the first leak detection hole 10 in the upper segment is smaller than that in the lower segment.

[0029] As another embodiment of this utility model: the diameter of the top of the first leak detection hole 10 is smaller than the width of the opening of the first liquid collection tank 8.

[0030] As another embodiment of the present invention: the second leak detection hole 11 includes: a horizontal pipe 01, a first vertical pipe 02 and a second vertical pipe 03. One end of the horizontal pipe 01 is connected to the second liquid collection tank 9 through the first vertical pipe 02, and the other end is connected to the second vertical pipe 03. A plug is provided at the end of the horizontal pipe 01 away from the first vertical pipe 02.

[0031] As another embodiment of this utility model: the second vertical pipe 03 is divided into multiple sections from top to bottom, and the diameter of the second vertical pipe 03 in the upper section is smaller than that in the lower section.

[0032] As another embodiment of the present invention: the moving ring 2 has an L-shaped structure, the first oil chamber 3 is located at the corner of the moving ring 2, the first oil chamber 3 is connected to the first oil hole on the valve body 1, the second oil chamber 4 is connected to the second oil hole on the valve body 1, and the valve body 1 has protrusions at the first oil chamber 3 and the second oil chamber 4.

[0033] In another embodiment of this utility model, a third sealing element 12 is provided on the moving ring 2 between the first oil chamber 3 and the second oil chamber 4 to ensure that the pressure in the first oil chamber 3 and the second oil chamber 4 is stable. Specifically, there are two third sealing elements 12.

[0034] In another embodiment of this utility model: the valve body 1 includes a housing 04 and a support ring 05. A movable ring 2 is slidably disposed between the housing 04 and the support ring 05. The support ring 05 is fixed to the housing 04 by bolts. A first liquid collecting groove 8 and a second liquid collecting groove 9 are respectively disposed on the housing 04 and the support ring 05. This structural design facilitates the disassembly and assembly of the movable ring 2, the first sealing element 6, and the second sealing element 7. Specifically, a sealing ring is provided between the housing 04 and the support ring 05, and the sealing ring is disposed in a groove in the housing 04.

[0035] As another embodiment of this utility model: a copper-aluminum alloy layer is provided on the contact surface between the moving ring 2 and the valve body 1. In this structural design, the contact surface will not rust, has good wear resistance, low friction, and the gap between the moving ring 2 and the valve body 1 changes little.

[0036] 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.

[0037] 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 leak detection device for a ball valve traveling ring, characterized by, The valve body comprises a moving ring which is slidably arranged in the valve body, the outer side of the moving ring is provided with a first oil cavity, the rear end of the moving ring is provided with a second oil cavity, two first sealing members are arranged between the first oil cavity and the channel in the valve body, two second sealing members are arranged between the second oil cavity and the channel in the valve body, a first liquid collecting groove is arranged on the valve body between the two first sealing members, a second liquid collecting groove is arranged on the valve body between the two second sealing members, the first liquid collecting groove is communicated with a first leak detection hole on the valve body, and the second liquid collecting groove is communicated with a second leak detection hole on the valve body.

2. The leak detection device for a ball valve moving ring according to claim 1, characterized in that, The liquid outlets of the first leak detection hole and the second leak detection hole are both downward.

3. The leak detection device for a ball valve moving ring according to claim 2, characterized in that, The first leak detection hole is vertically distributed.

4. The leak detection device for a ball valve moving ring according to claim 3, characterized in that, The first leak detection hole is divided into multiple sections from top to bottom, and the aperture of the first leak detection hole of the upper section is smaller than that of the lower section.

5. The leak detection device for a ball valve moving ring according to claim 4, wherein The aperture of the top end of the first leak detection hole is smaller than the slot width of the first liquid collecting groove.

6. The leak detection apparatus for a ball valve moving ring according to claim 1, wherein The second leak detection hole comprises a horizontal pipeline, a first vertical pipeline and a second vertical pipeline, one end of the horizontal pipeline is communicated with the second liquid collecting groove through the first vertical pipeline, and the other end is communicated with the second vertical pipeline.

7. The leak detection device for a ball valve moving ring according to claim 6, characterized in that, The second vertical pipeline is divided into multiple sections from top to bottom, and the aperture of the second vertical pipeline of the upper section is smaller than that of the lower section.

8. The leak detection apparatus for a ball valve moving ring according to claim 1, wherein The moving ring is in an L-shaped structure, the first oil cavity is arranged at the corner of the moving ring, the first oil cavity is communicated with a first oil hole on the valve body, and the second oil cavity is communicated with a second oil hole on the valve body.

9. The leak detection device for a ball valve moving ring according to claim 8, wherein A third sealing member is arranged on the moving ring between the first oil cavity and the second oil cavity.

10. The leak detection device for a ball valve moving ring according to claim 9, wherein The valve body comprises an outer shell and a supporting ring, the moving ring is slidably arranged between the outer shell and the supporting ring, the supporting ring is fixed with the outer shell through bolts, and the first liquid collecting groove and the second liquid collecting groove are arranged on the outer shell and the supporting ring respectively.

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