Safety valve with online seal integrity detection

Abstract

The utility model relates to a kind of safety valve with on-line detectability of sealing, including safety valve main body, leak detection unit, leak detection unit is set at the valve outlet of safety valve main body, leak detection unit includes shaft assembly, sealing plate, shaft assembly is connected on safety valve main body, sealing plate is connected with shaft assembly, rotating shaft assembly can drive sealing plate to open or close valve outlet, first detection passage is opened in sealing plate, second detection passage is opened in shaft assembly, first detection passage, second detection passage are communicated.The utility model can detect the sealing of safety valve on-line, solve the short board of existing on-line calibration;Shorten calibration duration, realize the rapid calibration of safety valve, improve efficiency and economy, improve the production efficiency of customer;Simple structure, convenient operation;Automatic recording, accurate and reliable, ensure personnel safety;The sealing detection unit can also be made into a component separately, mounted between safety valve outlet and pipeline, increase versatility.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a safety valve capable of online detection of sealing performance. Background Technology

[0002] Safety valves are special equipment, serving as the last line of defense for equipment such as installations, pipelines, and pressure vessels. Therefore, during normal operation of these devices, it is crucial to ensure that the set pressure and sealing performance of safety valves meet standards. Currently, most safety valves are checked through periodic calibration (once a year). Periodic calibration includes offline and online calibration. Offline calibration involves removing the valve from the pipeline or equipment and calibrating it on a safety valve calibration bench, verifying both the set pressure and sealing performance. Online calibration uses an online calibration instrument to check the safety valve on the pipeline or equipment, verifying the set pressure but not the sealing performance.

[0003] With societal development, there is an increasing emphasis on safety and production efficiency. Many customers require rapid equipment inspection and maintenance, and the same applies to safety valve calibration. The best way to quickly calibrate safety valves is through online calibration, which saves time on disassembly, assembly, and transportation. However, current online calibration methods cannot test the sealing performance of safety valves. Summary of the Invention

[0004] The purpose of this invention is to provide a safety valve that can detect its sealing performance online, thereby enabling online detection of the safety valve's sealing performance.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A safety valve capable of online sealing performance detection includes a safety valve body and a sealing performance detection unit disposed at the valve outlet of the safety valve body. The sealing performance detection unit includes a shaft assembly and a sealing plate. The shaft assembly is connected to the safety valve body, and the sealing plate is connected to the shaft assembly. Rotating the shaft assembly can drive the sealing plate to open or close the valve outlet. The sealing plate has a first detection channel, and the shaft assembly has a second detection channel. The first detection channel and the second detection channel are connected.

[0007] Preferably, the safety valve described above has a usage mode and a detection mode. In the usage mode, the sealing plate opens the valve outlet, and the first and second detection channels are closed to ensure normal flow of the medium. In the detection mode, the sealing plate closes the valve outlet, the inlet of the first detection channel of the sealing plate faces the inside of the safety valve body, and the first and second detection channels are opened to detect the sealing performance of the safety valve.

[0008] Preferably, in the above technical solution, the sealing detection unit further includes an opening and closing component, which is used to open or close the second detection channel. The opening and closing component includes a plug, which can block the outlet of the second detection channel to close it.

[0009] More preferably, the opening and closing assembly further includes a sealing sheet, which is sleeved on the plug.

[0010] Preferably, in the above technical solution, the sealing detection unit further includes an opening and closing component, which is used to open or close the second detection channel. The opening and closing component includes a control valve, which is located at the outlet of the second detection channel.

[0011] Preferably, in the above technical solution, the sealing detection unit further includes a measuring component, which includes a connector and a pipe fitting. The pipe fitting can be connected to the outlet of the second detection channel through the connector.

[0012] Preferably, in the above technical solution, the sealing detection unit further includes a measuring component, which includes a flow meter that can be connected to the outlet of the second detection channel.

[0013] Preferably, in the above technical solution, the shaft assembly includes a fixed shaft and a rotating shaft. The fixed shaft is fixedly connected to the safety valve body, and the rotating shaft is rotatably connected to the safety valve body. One end of the sealing plate is rotatably connected to the fixed shaft, and the other end is fixedly connected to the rotating shaft.

[0014] More preferably, the second detection channel is located on the fixed shaft, and the second detection channel is coaxial with the fixed shaft.

[0015] More preferably, the second detection channel is located on the rotating shaft, and the second detection channel is coaxial with the rotating shaft.

[0016] More preferably, the fixed shaft is connected to the lower end of the sealing plate, and the rotating shaft is connected to the upper end of the sealing plate.

[0017] More preferably, the fixed shaft and the rotating shaft extend radially into the interior of the sealing plate.

[0018] More preferably, a sealing element, such as a gasket or O-ring, is provided between the fixed shaft, the rotating shaft, and the safety valve body to ensure the sealing of the connection.

[0019] More preferably, the sealing detection unit further includes an operating handle, which is connected to the rotating shaft so as to rotate the rotating shaft to open or close the sealing plate.

[0020] Preferably, in the above technical solution, the shape of the sealing plate matches the shape of the valve outlet.

[0021] Preferably, the sealing plate is provided with a sealing layer around its perimeter.

[0022] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0023] 1. It can detect the sealing performance of safety valves online, overcoming the shortcomings of existing online calibration methods;

[0024] 2. Shorten calibration time, enable rapid calibration of safety valves, improve efficiency and economy, and enhance customer production efficiency;

[0025] 3. Simple structure and easy operation; automatic recording, accurate and reliable, ensuring personnel safety;

[0026] 4. Alternatively, the sealing detection unit can be made into a separate component and installed between the safety valve outlet and the pipeline to increase versatility. Attached Figure Description

[0027] Appendix Figure 1 This is a cross-sectional view of the safety valve in the operating mode in Example 1;

[0028] Appendix Figure 2 This is a cross-sectional schematic diagram showing the safety valve in detection mode in Example 1;

[0029] Appendix Figure 3 This is a cross-sectional schematic diagram showing the safety valve in detection mode in Example 2;

[0030] Appendix Figure 4 This is a cross-sectional view of the safety valve in operation mode in Example 3;

[0031] Appendix Figure 5This is a cross-sectional schematic diagram showing the safety valve in detection mode in Example 3;

[0032] Appendix Figure 6 This is a cross-sectional schematic diagram showing the safety valve in detection mode in Example 4;

[0033] Appendix Figure 7 This is a cross-sectional view of the safety valve in operation mode in Example 5;

[0034] Appendix Figure 8 This is a cross-sectional schematic diagram of the safety valve in detection mode in Example 5.

[0035] In the attached diagrams above:

[0036] 1. Safety valve body; 10. Valve outlet; 100. Valve body; 101. Valve seat; 102. Plug; 103. Adjusting ring; 104. Support screw; 105. Backlash plate; 106. Spacer; 107. Valve stem; 108. Guide sleeve; 109a. Stud; 109b. Nut; 110. Spring; 111. Valve cover; 112. Spring seat; 113. Adjusting screw; 114. Protective cover; 115. Locking nut;

[0037] 200. Fixed shaft; 201. Rotating shaft; 202. Second detection channel; 21. Sealing plate; 210. First detection channel; 22. Seal; 23. Operating handle;

[0038] 30. Plug; 31. Sealing plate; 32. Control valve;

[0039] 40. Connector; 41. Pipe fitting; 42. Flow meter; Detailed Implementation

[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Example 1:

[0043] like Figure 1 , 2 The safety valve shown includes a safety valve body 1, which comprises a valve body 100, a valve seat 101, a screw plug (drainage) 102, an adjusting ring 103, a support screw 104 (fixing the adjusting ring), a backflush plate 105 (fixing the valve disc and guide), a pad 106, a valve stem 107, a guide sleeve 108 (guide), a stud, a nut 109, a spring 110, a valve cover 111, a spring seat 112, an adjusting screw 113 (adjusting the set pressure), a protective cover 114, and a locking nut 115 (locking the adjusting screw). The structure of the safety valve body 1 is not related to the inventive point of this application, and the structure of the safety valve body 1 will not be described in detail.

[0044] In this embodiment, the safety valve further includes a sealing detection unit, which is located at the valve outlet 10 of the safety valve body 1. Specifically:

[0045] The sealing performance testing unit includes a shaft assembly and a sealing plate 21. The shaft assembly is connected to the safety valve body 1 (valve body), and the sealing plate 21 is connected to the shaft assembly. Rotating the shaft assembly can drive the sealing plate 21 to open or close the valve outlet 10. The sealing performance testing unit is similar to the sealing structure of a butterfly valve.

[0046] The shaft assembly includes a fixed shaft 200 and a rotating shaft 201. The fixed shaft 200 is fixedly connected to the safety valve body 1 (valve body), such as by a threaded connection. The rotating shaft 201 is rotatably connected to the safety valve body 1 (valve body). One end of the sealing plate 21 is rotatably connected to the fixed shaft 200, and the other end is fixedly connected to the rotating shaft 201.

[0047] In this embodiment, a sealing element 22, such as a gasket or O-ring, is provided between the fixed shaft 200, the rotating shaft 201, and the safety valve body 1 to ensure the sealing of the connection. The fixed shaft 200 is connected to the lower end of the sealing plate 21, and the rotating shaft 201 is connected to the upper end of the sealing plate 21. The fixed shaft 200 and the rotating shaft 201 extend radially into the sealing plate 21. The fixed shaft 200 and the sealing plate 21 need to rotate relative to each other. Therefore, the upper end of the fixed shaft 200 cooperates with the sealing plate 21 through a cylinder. The rotating shaft 201 needs to drive the sealing plate to rotate. Therefore, the lower end of the rotating shaft 201 cooperates with the sealing plate through a quadrilateral or hexagonal shape to provide rotational torque and fixing effect.

[0048] In addition, the sealing detection unit also includes an operating handle 23, which is connected to the rotating shaft 201 so that rotating the rotating shaft 201 can open or close the sealing plate 21. Specifically, the operating handle 23 is fixed to the safety valve body 1 (valve body) by studs and nuts. The middle part of the operating handle 23 is fitted with the rotating shaft 201 by a quadrilateral or hexagonal shape, etc. The operating handle 23 has a built-in locking structure to ensure that the sealing plate 21 is kept in the required position.

[0049] The shape of the sealing plate 21 matches the shape of the valve outlet 10, as shown in the figure; at the same time, a sealing layer is provided around the sealing plate 21 to ensure reliable sealing and rotation characteristics with the safety valve body 1.

[0050] A first detection channel 210 is provided on the sealing plate 21. The entrance of the first detection channel 210 is located on the plate surface of the sealing plate 21, and the first detection channel 210 extends radially along the sealing plate 21. A second detection channel 202 is provided on the rotating shaft 201. The first detection channel 210 is coaxial with the rotating shaft 201, and the outlet of the second detection channel 202 forms a connecting end. The first detection channel 210 and the second detection channel 202 are connected.

[0051] The safety valve has an operating mode and a detection mode. In the operating mode: the sealing plate 21 opens the valve outlet 10, and the first detection channel 210 and the second detection channel 202 are closed to ensure that the medium can flow normally. In the detection mode, the sealing plate 21 closes the valve outlet 10, the inlet of the first detection channel 210 of the sealing plate 21 faces the inside of the safety valve body 1, and the first detection channel 210 and the second detection channel 202 are opened to detect the sealing performance of the safety valve.

[0052] The sealing detection unit also includes an opening and closing component and a measuring component. The opening and closing component is used to open or close the second detection channel 202.

[0053] In this embodiment, the opening and closing assembly includes a plug 30 and a sealing plate 31. The sealing plate 31 is sleeved on the plug 30. The plug 30 can seal the connection end of the outlet of the second detection channel 202 and close it. The sealing plate 31 can ensure the sealing performance.

[0054] In this embodiment: the measuring component includes a connector 40 and a pipe 41. The pipe 41 can be connected to the outlet of the second detection channel 202 through the connector 40 for sealing test.

[0055] The following details the usage process of this embodiment:

[0056] When the valve is working normally, the sealing plate 21 is rotated to the open position by operating handle 23 and then fixed; the outlet of the second detection channel 202 is sealed by plug 30 and sealing plate 31.

[0057] During online sealing testing, the sealing plate 21 is rotated to the closed position and fixed by operating the handle 23; the plug 30 and sealing plate 31 are removed, and the connector 40 and hose 41 are installed.

[0058] The sealing performance is tested according to the valve medium type and test requirements. For gas, the bubble counting method is used, and for liquid, the leakage is measured.

[0059] After the sealing test is completed, restore the valve to its normal operating state.

[0060] Example 2:

[0061] like Figure 3 The safety valve shown is capable of online leak detection. This embodiment is basically the same as Embodiment 1, except that the measuring component includes a flow meter 42, which can be connected to the outlet of the second detection channel 202. During online leak detection, the plug 30 and sealing plate 31 are removed, the flow meter 42 is installed, and the flow meter 42 is connected to a calibrator or computer. The measured leakage is transmitted to the computer and automatically recorded.

[0062] Example 3:

[0063] like Figure 4 , 5 The safety valve shown is capable of online sealing performance testing. This embodiment is basically the same as Embodiment 1, except that the opening and closing assembly includes a control valve 32, which is located at the outlet of the second detection channel 202. The control valve 32 can be a ball valve or similar device. When the valve is operating normally, the control valve 32 is closed; when performing online sealing performance testing, the control valve 32 is opened. A connector 40 and a hose 41 are installed on the control valve 32.

[0064] Example 4:

[0065] like Figure 6 The safety valve shown is capable of online leak detection. This embodiment is basically the same as Embodiment 3, except that the measuring component includes a flow meter 42, which can be connected to the control valve 32. When the valve is operating normally, the control valve 32 is closed. During online leak detection, the flow meter 42 is installed on the control valve 32 and connected to a calibrator or computer. The measured leakage is transmitted to the computer and automatically recorded.

[0066] Example 5:

[0067] like Figure 7 , 8The safety valve shown is capable of online sealing detection. This embodiment is basically the same as any one of embodiments one to four, except that the second detection channel 202 is opened on the fixed shaft 200.

[0068] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A safety valve capable of online sealing detection, comprising a safety valve body, characterized in that: The safety valve further includes a sealing detection unit, which is located at the valve outlet of the safety valve body. The sealing detection unit includes a shaft assembly and a sealing plate. The shaft assembly is connected to the safety valve body, and the sealing plate is connected to the shaft assembly. Rotating the shaft assembly can drive the sealing plate to open or close the valve outlet. The sealing plate has a first detection channel, and the shaft assembly has a second detection channel. The first detection channel and the second detection channel are connected.

2. The safety valve capable of online sealing detection according to claim 1, characterized in that: The safety valve has a usage mode and a detection mode. In the usage mode, the sealing plate opens the valve outlet, and the first detection channel and the second detection channel are closed. In the detection mode, the sealing plate closes the valve outlet, the inlet of the first detection channel of the sealing plate faces the inside of the safety valve body, and the first detection channel and the second detection channel are open.

3. The safety valve capable of online sealing performance detection according to claim 1 or 2, characterized in that: The sealing detection unit further includes an opening and closing component, which is used to open or close the second detection channel. The opening and closing assembly includes a plug that can seal the outlet of the second detection channel to close it; the opening and closing assembly also includes a sealing plate that is sleeved on the plug; or The opening and closing assembly includes a control valve, which is located at the outlet of the second detection channel.

4. The safety valve capable of online sealing detection according to claim 1, characterized in that: The sealing detection unit further includes a measuring component, which includes a connector and a pipe fitting. The pipe fitting can be connected to the outlet of the second detection channel via the connector; or The measurement component includes a flow meter, which can be connected to the outlet of the second detection channel.

5. The safety valve capable of online sealing detection according to claim 1, characterized in that: The shaft assembly includes a fixed shaft and a rotating shaft. The fixed shaft is fixedly connected to the safety valve body, and the rotating shaft is rotatably connected to the safety valve body. One end of the sealing plate is rotatably connected to the fixed shaft, and the other end is fixedly connected to the rotating shaft.

6. The safety valve capable of online sealing detection according to claim 5, characterized in that: The second detection channel is located on the fixed shaft, and the second detection channel is coaxial with the fixed shaft; or The second detection channel is located on the rotating shaft, and the second detection channel is coaxial with the rotating shaft.

7. The safety valve capable of online sealing detection according to claim 5, characterized in that: The fixed shaft is connected to the lower end of the sealing plate, and the rotating shaft is connected to the upper end of the sealing plate.

8. The safety valve capable of online sealing detection according to claim 5, characterized in that: The fixed shaft and the rotating shaft extend radially into the interior of the sealing plate; A seal is provided between the fixed shaft, the rotating shaft and the safety valve body.

9. The safety valve capable of online sealing detection according to claim 5, characterized in that: The sealing detection unit also includes an operating handle, which is connected to the rotating shaft.

10. The safety valve capable of online sealing detection according to claim 1, characterized in that: The shape of the sealing plate matches the shape of the valve outlet; The sealing plate is provided with a sealing layer around its perimeter.

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