Special tool for testing one-way sealing function of trunk line ball valve body

Abstract

The utility model relates to a special tool for testing the one-way sealing function of a trunk line ball valve body, which comprises a main body, an ejector pin and an ejection mechanism, a cavity with two open ends is arranged in the main body, and a gas leakage port penetrating inside and outside is arranged on the cavity; the ejector pin is movably mounted in the cavity, and one end of the ejector pin extends out of one end of the cavity; and the ejection mechanism is mounted on the main body and is used for ejecting the ejector pin. The special tool has the beneficial effects that the structure is simple, the design is reasonable, the leakproofness of the check valve in the ball valve is tested by utilizing the special tool, the check valve function of the valve body is ensured to be complete, and the operation safety, safety and reliability are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way sealing function testing equipment for a ball valve body, in particular to a special tool for testing the one-way sealing function of a main line ball valve body. Background Art

[0002] As one of the most common and important equipment in gas transmission stations, ball valves play an important role. Usually, ball valves larger than 4 inches are designed with an internal check valve in the valve body (the check valve has a single sealing function and is used to seal the fluid medium of the ball valve body with the outside world), which serves as the first line of protection against leakage. The check valve inside the grease injection nozzle serves as the second line of protection against leakage to prevent natural gas from blowing out.

[0003] As the equipment is running, the problems such as the valve grease nozzle being exposed, unable to inject grease, and failure of single-way sealing function are gradually increasing, and the grease nozzle needs to be replaced. Since the grease nozzle and the pipeline are connected, it is impossible to determine whether the function of the check valve of the valve body is intact, and the main line cannot be vented to replace the grease nozzle. Therefore, it is necessary to use special tools to test the tightness of the check valve in the ball valve to confirm that the check valve of the valve body is functioning intact to ensure the safety of the operation. Utility Model Content

[0004] The utility model provides a special tool for testing the one-way sealing function of a main line ball valve body, aiming to solve the problems in the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A special tool for testing the one-way sealing function of a main line ball valve body comprises a main body, an ejector pin and an ejection mechanism. The main body is provided with a cavity with both ends open, and a gas leakage port penetrating inside and outside is provided on the cavity; the ejector pin is movably installed in the cavity, and one end of the ejector pin extends outside one end of the cavity; the ejection mechanism is installed on the main body and is used to eject the ejector pin.

[0007] The beneficial effects of the utility model are as follows: during on-site testing, when the pipeline is under pressure, one end of the main body in the tool is connected to the valve grease injection nozzle, and the ejector pin inside the main body is screwed into the grease injection nozzle through the ejection mechanism to push open the one-way check valve of the grease injection nozzle, and whether the check valve inside the valve is functioning intact can be judged by observing whether there is gas leakage, and the test is convenient.

[0008] The utility model has the advantages of simple structure and reasonable design. The special tool is used to test the tightness of the check valve in the ball valve, confirming that the one-way valve function of the valve body is intact, and ensuring the safe and reliable operation.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the ejection mechanism includes a screw rod, one end of which passes through the other end of the cavity and extends into the cavity, and is threadedly connected to the cavity; one end of the screw rod abuts against the other end of the ejector pin.

[0011] The beneficial effect of adopting the above further solution is that during testing, the screw is manually rotated, and the screw is moved in the main body by utilizing the threaded connection between the screw and the main body, so that the screw pushes the ejector pin to move, which is easy to operate and saves time and effort.

[0012] Furthermore, the main body includes a rotating cylinder and a clamping cylinder, the rotating cylinder and the clamping cylinder are respectively hollow inside and open at both ends; the gas leakage port is distributed at a position of the rotating cylinder close to one end thereof, and the clamping cylinder is installed at one end of the rotating cylinder; the ejector pin passes through one end of the rotating cylinder and the clamping cylinder, and one end of the screw passes through the other end of the rotating cylinder and is threadedly connected to the rotating cylinder.

[0013] The beneficial effect of adopting the above further scheme is that during on-site testing, when the pipeline is under pressure, one end of the rotating cylinder in the tool is connected to the valve grease injection nozzle, and the ejector pin inside the rotating cylinder is screwed into the grease injection nozzle by a screw to push open the one-way check valve of the grease injection nozzle. By observing whether there is gas leakage, it can be judged whether the check valve inside the valve is functioning intact, and the test is convenient.

[0014] Furthermore, the other end of the rotating cylinder is threadedly connected with a pressure cap, and the pressure cap is sleeved outside the screw rod.

[0015] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and utilizing the thread of the pressure cap and the rotating cylinder to lock or loosen the screw.

[0016] Furthermore, the clamping cylinder is threadedly connected to one end of the rotating cylinder.

[0017] The beneficial effects of adopting the above further scheme are simple structure, reasonable design, and utilizing the threaded connection between the clamping cylinder and the rotating cylinder to achieve separation and abutment between the clamping cylinder and the rotating cylinder, which is easy to operate and saves time and effort.

[0018] Furthermore, a pair of snap connection ports are provided on one end of the snap connection cylinder away from the rotating cylinder, and sealing gaskets are installed at the pair of snap connection ports, and the sealing gaskets are sleeved outside the ejector pin.

[0019] The beneficial effect of adopting the above further scheme is that during testing, the clamping cylinder is manually rotated in advance, connected to the valve body using the snap connection port on the clamping cylinder, and sealed using a sealing gasket, and then the above rotating cylinder is rotated until it abuts against the clamping cylinder, thereby achieving connection between the tool and the valve body.

[0020] Furthermore, the cavity has a structure with one end being thin and the other end being thick, and a thread is provided on the inner wall of the thick end of the cavity; the ejector pin is located in the thin end of the cavity and slidingly fits with the inner wall of the thin end of the cavity, and its other end extends into the thick end of the cavity and abuts against one end of the screw; one end of the screw is threadedly connected to the thick end of the cavity.

[0021] The beneficial effect of adopting the above further solution is that the structure design of the above cavity is reasonable, which can realize the assembly of the ejector pin and the threaded connection between the screw rod and the cavity, and the assembly is convenient.

[0022] Furthermore, the ejection mechanism also includes an operating handle, and the other end of the screw rod is connected to the operating handle.

[0023] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and utilizing the operating handle to rotate the screw rod, which is easy to operate and saves time and effort.

[0024] Furthermore, the other end of the screw rod is detachably connected to the middle portion of the operating handle.

[0025] The beneficial effects of adopting the above further solution are simple structure, reasonable design, convenient disassembly and assembly of the screw rod and the operating handle, and time and labor saving.

[0026] Furthermore, a groove is provided at the center of the operating handle, and a screw hole communicating with the groove is provided at one end of the operating handle, and a top screw is threadedly connected to the screw hole.

[0027] The beneficial effects of adopting the above further scheme are simple structure and reasonable design. The threaded connection between the thimble and the operating handle is used to achieve the abutment or separation between the thimble and the screw, thereby realizing the disassembly and assembly of the screw, which is easy to operate and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 This is a schematic diagram of the internal structure of the rotating cylinder in the utility model;

[0030] Figure 3 It is a schematic diagram of the internal structure of the medium-pressure cap of the utility model.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1. Ejector pin; 2. Screw rod; 3. Rotating cylinder; 4. Snap-on cylinder; 5. Pressing cap; 6. Snap-on connector; 7. Sealing pad; 8. Operating handle; 9. Ejector screw. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] Example 1

[0038] like Figures 1 to 3 As shown, this embodiment provides a special tool for testing the one-way sealing function of a main line ball valve body, comprising a main body, an ejector pin 1 and an ejection mechanism, wherein the main body is provided with a cavity with both ends open, and a gas leakage port penetrating inside and outside is provided on the cavity; the ejector pin 1 is movably installed in the cavity, and one end of the ejector pin 1 extends outside one end of the cavity; the ejection mechanism is installed on the main body, and is used to eject the ejector pin 1.

[0039] During on-site testing, when the pipeline is under pressure, connect one end of the main body of the tool to the grease injection nozzle of the valve, and screw the ejector pin 1 inside the main body into the grease injection nozzle through the ejection mechanism to push open the one-way check valve of the grease injection nozzle. By observing whether there is gas leakage, it can be judged whether the check valve inside the valve is functioning intact. The test is convenient.

[0040] Preferably, in this embodiment, the ejector pin 1 is preferably a round rod-shaped structure.

[0041] This embodiment has a simple structure and a reasonable design. The special tool is used to test the tightness of the check valve in the ball valve to confirm that the one-way valve of the valve body functions intact, thereby ensuring safe and reliable operation.

[0042] Example 2

[0043] Based on Example 1, in this embodiment, the ejection mechanism includes a screw rod 2, one end of which passes through the other end of the cavity and extends into the cavity and is threadedly connected to the cavity; one end of the screw rod 2 abuts against the other end of the ejector pin 1.

[0044] During the test, the screw rod 2 is manually rotated, and the screw rod 2 is moved in the main body by utilizing the threaded connection between the screw rod 2 and the main body, so that the screw rod 2 pushes the ejector pin 1 to move, which is easy to operate and saves time and effort.

[0045] Preferably, in this embodiment, the screw rod 2 is preferably a straight rod structure.

[0046] Example 3

[0047] On the basis of Example 2, in this embodiment, the main body includes a rotating cylinder 3 and a clamping cylinder 4, and the rotating cylinder 3 and the clamping cylinder 4 are respectively hollow inside and open at both ends; the gas leakage port is distributed in the part of the rotating cylinder 3 close to one end thereof, and the clamping cylinder 4 is installed at one end of the rotating cylinder 3; the ejector pin 1 passes through one end of the rotating cylinder 3 and the clamping cylinder 4, and one end of the screw 2 passes through the other end of the rotating cylinder 3 and is threadedly connected to the rotating cylinder 3.

[0048] During on-site testing, when the pipeline is under pressure, connect one end of the rotating cylinder 3 in the tool to the valve grease injection nozzle, screw the ejector pin inside the rotating cylinder 3 into the grease injection nozzle through the screw 2, and push open the one-way check valve of the grease injection nozzle. By observing whether there is gas leakage, it can be judged whether the check valve inside the valve is functioning intact, which is convenient for testing.

[0049] Preferably, in this embodiment, the rotating cylinder 3 and the clamping cylinder 4 are preferably cylindrical structures respectively.

[0050] In addition, the cross-sections of the outer edges of the rotating cylinder 3 and the clamping cylinder 4 are hexagonal.

[0051] Example 4

[0052] On the basis of Example 3, in this embodiment, the other end of the rotating cylinder 3 is threadedly connected with a pressing cap 5 , and the pressing cap 5 is sleeved outside the screw rod 2 .

[0053] This solution has a simple structure and a reasonable design, and utilizes the threads of the pressing cap 5 and the rotating cylinder 3 to lock or loosen the screw 2.

[0054] Preferably, in this embodiment, a step is provided at the other end of the rotating cylinder 3 , a thread is provided on the side wall of the step, and one end of the pressing cap 5 is threadedly connected to the step.

[0055] In addition, the pressing cap 5 is in a T-shaped structure, the thin end of which is threadedly connected to the step at the other end of the rotating cylinder 3 , and the thick end of the pressing cap 5 is in contact with the end surface of the other end of the rotating cylinder 3 .

[0056] It should be noted that when the pressing cap 5 is tightened, its interior is in close contact with the screw rod 2 .

[0057] Example 5

[0058] On the basis of any one of Embodiments 3 to 4, in this embodiment, the clamping cylinder 4 is threadedly connected to one end of the rotating cylinder 3 .

[0059] This solution has a simple structure and a reasonable design. The threaded connection between the clamping cylinder 4 and the rotating cylinder 3 is used to realize the separation and abutment between the clamping cylinder 4 and the rotating cylinder 3. The operation is simple and time-saving and labor-saving.

[0060] Based on the above scheme, during testing, the clamping cylinder 4 is rotated in advance to connect it with the valve body, and then the rotating cylinder 3 is rotated until one end thereof abuts against the clamping cylinder 4 .

[0061] Example 6

[0062] On the basis of Example 5, in this embodiment, a pair of snap connection ports 6 are provided on one end of the snap connection cylinder 4 away from the rotating cylinder 3 , and sealing gaskets 7 are installed at the pair of snap connection ports 6 , and the sealing gaskets 7 are sleeved outside the ejector pin 1 .

[0063] During the test, manually rotate the clamping cylinder 4 in advance, connect it to the valve body using the snap connection port 6 on the clamping cylinder 4, and seal it using the sealing gasket 7, then rotate the rotating cylinder 3 until it abuts against the clamping cylinder 4, thereby achieving the connection between the tool and the valve body.

[0064] Based on the above solution, the sealing gasket 7 is an annular structure, and is movably sleeved on the ejector pin 1 .

[0065] Example 7

[0066] On the basis of any one of Examples 2 to 6, in this embodiment, the cavity has a structure with one end being thin and the other end being thick, and a thread is provided on the inner wall of the thick end of the cavity; the ejector pin 1 is located in the thin end of the cavity and slidingly fits against the inner wall of the thin end of the cavity, and the other end thereof extends into the thick end of the cavity and abuts against one end of the screw rod 2; one end of the screw rod 2 is threadedly connected to the thick end of the cavity.

[0067] The structure design of the cavity is reasonable, which can realize the assembly of the ejector pin 1 and the threaded connection between the screw rod 2 and the cavity, and the assembly is convenient.

[0068] Based on the above solution, the diameter of the screw 2 is equal to the size of the thick end of the cavity, and the diameter of the ejector pin 1 is smaller than the diameter of the thin end of the cavity.

[0069] In addition, the other end of the ejector pin 1 extends into the thick end of the cavity and abuts against one end of the screw rod 2 .

[0070] Example 8

[0071] On the basis of any one of Embodiments 2 to 7, in this embodiment, the ejection mechanism further includes an operating handle 8 , and the other end of the screw rod 2 is connected to the operating handle 8 .

[0072] The solution has a simple structure and a reasonable design. The screw rod is rotated by the operating handle 8, which is easy to operate and saves time and effort.

[0073] Preferably, in this embodiment, the operating handle 8 is preferably a straight rod structure, which is distributed perpendicular to the screw rod 2.

[0074] Example 9

[0075] On the basis of Example 8, in this embodiment, the other end of the screw rod 2 is detachably connected to the middle part of the operating handle 8.

[0076] This solution has a simple structure and a reasonable design, and the screw rod 2 and the operating handle 8 are easy to disassemble and assemble, saving time and effort.

[0077] Alternatively, the other end of the screw rod 2 is fixedly connected to the middle part of the operating handle 8 .

[0078] Example 10

[0079] On the basis of Example 9, in this embodiment, a groove is provided at the center of the operating handle 8, and a screw hole connected to the groove is provided at one end of the operating handle 8, and a top screw 9 is threadedly connected to the screw hole.

[0080] The solution has a simple structure and a reasonable design. The threaded connection between the thimble 9 and the operating handle 8 is used to achieve the abutment or separation between the thimble 1 and the screw rod 2, thereby realizing the disassembly and assembly of the screw rod 2. The operation is simple, time-saving and labor-saving.

[0081] Alternatively, the other end of the screw rod 2 is directly threadedly connected to the groove in the middle of the operating handle 8 .

[0082] The working principle of the utility model is as follows:

[0083] During the test, manually rotate the clamping cylinder 4 in advance, connect it to the valve body using the snap connection port 6 on the clamping cylinder 4, and seal it using the sealing gasket 7; then rotate the rotating cylinder 3 until it abuts against the clamping cylinder 4, thereby achieving the connection between the tool and the valve body.

[0084] Finally, manually rotate the screw 2 and use the threaded connection between the screw 2 and the main body to move the screw 2 inside the main body, so that the screw 2 pushes the ejector pin 1 to move, so that the ejector pin 1 is screwed into the grease injection nozzle and the one-way check valve of the grease injection nozzle is pushed open. By observing whether there is gas leakage, it can be judged whether the check valve inside the valve is functioning intact.

[0085] Due to the high pressure inside the pipeline, when the sealing of the valve body is not good, there will be gas leakage at the gas leakage port, accompanied by a hissing sound, and the naked eye can determine whether there is a leak.

[0086] The utility model provides a special tool for detecting the one-way sealing function of a grease injection nozzle inside a ball valve. The tool is suitable for different types of grease injection nozzles and has wide applicability. It is simple and safe to operate on site, and the risk of personnel being injured during operation is reduced to the greatest extent.

[0087] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0088] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A special tool for testing the one-way sealing function of a main line ball valve body, characterized by: It comprises a main body, an ejector pin (1) and an ejection mechanism, wherein a cavity with both ends open is provided in the main body, and a gas leakage port penetrating inside and outside is provided on the main body; the ejector pin (1) is movably mounted in the cavity, and one end of the ejector pin (1) extends outside one end of the cavity; the ejection mechanism is mounted on the main body and is used to eject the ejector pin (1).

2. The special tool for testing the one-way sealing function of the main line ball valve body according to claim 1, characterized in that: The ejection mechanism comprises a screw rod (2), one end of the screw rod (2) passes through the other end of the cavity and extends into the cavity, and is threadedly connected to the cavity; one end of the screw rod (2) abuts against the other end of the ejector pin (1).

3. The special tool for testing the one-way sealing function of the main line ball valve body according to claim 2, characterized in that: The main body comprises a rotating cylinder (3) and a clamping cylinder (4); the rotating cylinder (3) and the clamping cylinder (4) are respectively hollow inside and open at both ends; the gas leakage port is distributed at a position close to one end of the rotating cylinder (3); the clamping cylinder (4) is installed at one end of the rotating cylinder (3); the ejector pin (1) passes through one end of the rotating cylinder (3) and the clamping cylinder (4); one end of the screw (2) passes through the other end of the rotating cylinder (3) and is threadedly connected to the rotating cylinder (3).

4. The special tool for testing the one-way sealing function of the main line ball valve body according to claim 3 is characterized by: The other end of the rotating cylinder (3) is threadedly connected to a pressing cap (5), and the pressing cap (5) is sleeved outside the screw rod (2).

5. The special tool for testing the one-way sealing function of the main line ball valve body according to claim 3 is characterized by: The clamping cylinder (4) is threadedly connected to one end of the rotating cylinder (3).

6. The special tool for testing the one-way sealing function of the main line ball valve body according to claim 5, characterized in that: A pair of snap connection ports (6) are provided on one end of the snap connection cylinder (4) away from the rotating cylinder (3), and sealing gaskets (7) are installed at the pair of snap connection ports (6), and the sealing gaskets (7) are sleeved outside the ejector pin (1).

7. The tool for testing the one-way sealing function of a main line ball valve body according to any one of claims 2 to 6, characterized in that: The cavity is thin at one end and thick at the other end, and a thread is provided on the inner wall of the thick end of the cavity; the ejector pin (1) is located in the thin end of the cavity and is slidably fitted with the inner wall of the thin end of the cavity, and the other end of the ejector pin (1) extends into the thick end of the cavity and abuts against one end of the screw rod (2); one end of the screw rod (2) is threadedly connected to the thick end of the cavity.

8. The special tool for testing the one-way sealing function of a main line ball valve body according to any one of claims 2 to 6, characterized in that: The ejection mechanism further comprises an operating handle (8), and the other end of the screw rod (2) is connected to the operating handle (8).

9. The special tool for testing the one-way sealing function of the main line ball valve body according to claim 8, characterized in that: The other end of the screw rod (2) is detachably connected to the middle portion of the operating handle (8).

10. The special tool for testing the one-way sealing function of the main line ball valve body according to claim 9, characterized in that: A groove is provided at the center of the operating handle (8), and a screw hole communicating with the groove is provided at one end of the operating handle (8), and a top screw (9) is threadedly connected to the screw hole.

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