Safety valve sealing test blanking cap

Abstract

The utility model discloses a safety valve sealing test blanking cap which comprises a safety valve body, a plugging unit and a leakage prompting unit, the plugging unit comprises a plugging cover, the plugging cover is fixed at the gas transmission end of the safety valve body through bolts and nuts, and the top of the plugging cover is provided with an annular groove for gas to enter. The leakage prompting unit comprises a gas spraying pipe fixedly connected to the side wall of the plugging cover, one end of the gas spraying pipe penetrates into an annular groove of the plugging cover and is communicated with the annular groove, and the leakage prompting unit further comprises a pneumatic rotating assembly used for detecting gas flowing in the gas spraying pipe. According to the utility model, when the sealing between the plugging cover and the safety valve body fails, leaked gas enters the gas ejector pipe, and the pneumatic rotating assembly is driven to operate by utilizing gas flow in the gas ejector pipe, so that an operator is reminded of gas leakage in time, and the deviation of sealing test data caused by leakage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, and in particular to a safety valve sealing test plug. Background Technology

[0002] A safety valve is a special valve whose opening and closing element is normally closed under the action of external force. When the pressure of the medium in the equipment or pipeline rises above the specified value, it prevents the pressure of the medium in the pipeline or equipment from exceeding the specified value by discharging the medium to the outside of the system. Safety valves belong to the category of automatic valves and are mainly used on boilers, pressure vessels and pipelines to control the pressure to not exceed the specified value, playing an important role in protecting personal safety and equipment operation.

[0003] When testing the sealing performance of a safety valve, the output end of the safety valve needs to be effectively sealed so that gas can be injected into the safety valve to test its sealing effect. When using a flange cover to seal one end of the safety valve, it is difficult for the user to know for sure whether the flange cover and the safety valve are tightly fitted. As the pressure gradually increases, some gas may leak from the connection between the safety valve and the flange cover. When the leak point is small, the user may not be able to detect it, thus causing the test data to fail to reflect its actual sealing performance. Therefore, a sealing cover is proposed for the safety valve sealing test. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the current safety valve sealing test plug, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a safety valve sealing test plug, which is suitable for solving the problem that it is difficult for users to know whether the flange cover and the safety valve are tightly fitted. As the pressure inside the safety valve gradually increases, some gas may leak from the connection between the safety valve and the flange cover. When the leakage point is small, users may not be able to detect it, thus causing the test data to fail to reflect its actual sealing performance.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a safety valve sealing test plug, comprising:

[0008] Safety valve body;

[0009] A plugging unit includes a plugging cover, which is fixed to the gas supply end of a safety valve body by bolts and nuts, and the top of the plugging cover has an annular groove for gas to enter.

[0010] The leakage warning unit includes a jet pipe fixedly connected to the side wall of the sealing cap, one end of which extends into and communicates with the annular groove of the sealing cap. The leakage warning unit also includes a pneumatic rotating assembly for detecting gas flow in the jet pipe.

[0011] As a preferred embodiment of the safety valve sealing test plug of this utility model, the top of the plug is provided with a sealing groove with a diameter smaller than that of the annular groove, and a detachable sealing ring is slidably provided in the sealing groove, the sealing ring protruding from the surface of the plug.

[0012] As a preferred embodiment of the safety valve sealing test plug of this utility model, the bottom of the plug is provided with an installation hole that communicates with the sealing groove, and the bottom of the plug is provided with a sealing element for sealing the installation hole.

[0013] As a preferred embodiment of the safety valve sealing test plug of this utility model, the sealing element includes a sealing screw sleeve fixed to the bottom of the plug, the opening at the bottom of the mounting hole is located inside the sealing screw sleeve, and a detachable sealing cap is threaded onto the bottom of the sealing screw sleeve.

[0014] As a preferred embodiment of the safety valve sealing test plug of this utility model, the pneumatic rotating assembly includes a connecting rod fixedly connected to the side wall of the jet pipe, a rotating rod rotatably connected to the bottom end of the connecting rod, and multiple annularly distributed deflection plates fixedly connected to the side wall of the rotating rod.

[0015] In a preferred embodiment of the safety valve sealing test plug of this utility model, the connecting rod is inclined and the rotating rod is not located on the axis of the jet pipe.

[0016] As a preferred embodiment of the safety valve sealing test plug of this utility model, the outer wall of the jet pipe is fitted with a windshield, the windshield is transparent, and the pneumatic rotating component is located inside the windshield.

[0017] As a preferred embodiment of the safety valve sealing test plug of this utility model, the outer wall of the jet pipe is provided with a whistle, and part of the gas flowing in the jet pipe is released through the whistle.

[0018] The beneficial effects of this utility model are as follows: when a seal failure occurs between the sealing cap and the safety valve body, the leaked gas will enter the jet pipe, and the airflow in the jet pipe will drive the pneumatic rotating component to operate, thereby timely and intuitively reminding the operator that there is a gas leak, so as to avoid deviations in the sealing test data due to leakage, and provide clear instructions for the reinstallation and calibration of the sealing cap. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the overall structure of the safety valve sealing test plug proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the pneumatic rotating component structure proposed in this utility model;

[0022] Figure 3 This is a schematic diagram showing the disassembled sealing cap and sealing ring proposed in this utility model;

[0023] Figure 4 This is a schematic diagram of the disassembled structure of the sealing element proposed in this utility model.

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

[0025] 100. Safety valve body;

[0026] 200. Sealing unit; 201. Sealing cap; 202. Connector; 203. Annular groove; 204. Sealing groove; 205. Sealing ring; 206. Mounting hole; 207. Seal; 207a. Sealing threaded sleeve; 207b. Sealing cap;

[0027] 300. Leakage indication unit; 301. Jet nozzle; 302. Pneumatic rotation assembly; 302a. Connecting rod; 302b. Rotating rod; 302c. Deflector plate; 303. Wind shield; 304. Whistle. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0031] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0032] Example 1

[0033] Reference Figures 1-4 The first embodiment of this utility model provides a safety valve sealing test plug, which can remind the operator of gas leakage when a sealing failure occurs between the plug and the safety valve body, so that the plug can be reinstalled. It includes: safety valve body 100, plugging unit 200 and leakage indication unit 300.

[0034] The sealing unit 200 includes a sealing cover 201, which is fixed to the gas supply end of the safety valve body 100 by bolts and nuts. The top of the sealing cover 201 is provided with an annular groove 203 for gas to enter.

[0035] The leak detection unit 300 includes a jet pipe 301 fixedly connected to the side wall of the sealing cover 201. One end of the jet pipe 301 passes through the annular groove 203 of the sealing cover 201 and is connected to the annular groove 203. The leak detection unit 300 also includes a pneumatic rotating assembly 302 for detecting the gas flow in the jet pipe 301.

[0036] The sealing cap 201 serves as a sealing component at the air inlet end of the safety valve body 100. It achieves a sealed connection by tightening bolts and nuts. The connector 202 is used to connect an external air pump pipeline and gradually supply air into the safety valve body 100 for pressurization. When the seal between the sealing cap 201 and the safety valve body 100 fails due to installation errors, the leaked gas will leak into the annular groove 203 and then enter the jet pipe 301. At this time, the airflow in the jet pipe 301 is ejected from one end and drives the pneumatic rotating component 302 to rotate.

[0037] The pneumatic rotating component 302 in motion can promptly and intuitively alert the operator to the presence of a gas leak, thereby effectively avoiding deviations in test data caused by leaks. After the pneumatic rotating component 302 is triggered, the sealing cover 201 is disassembled and reinstalled. When the pneumatic rotating component 302 is no longer triggered, the sealing cover 201 seals the air inlet of the safety valve body 100 to ensure the accuracy of the sealing test.

[0038] Example 2

[0039] Reference Figures 1-4 This is the second embodiment of the present invention. Unlike the previous embodiment, the top of the sealing cover 201 is provided with a sealing groove 204 with a diameter smaller than that of the annular groove 203. A detachable sealing ring 205 is slidably provided in the sealing groove 204, and the sealing ring 205 protrudes from the surface of the sealing cover 201.

[0040] The sealing ring 205 is annular and located in the inner ring of the annular groove 203. After the sealing cover 201 is fixed to the air inlet end of the safety valve body 100, the sealing ring 205 is tightly attached to the end of the safety valve body 100 to improve the sealing performance between the sealing cover 201 and the safety valve body 100. When gas leaks from the sealing ring 205, the gas flows into the annular groove 203.

[0041] The bottom of the sealing cover 201 is provided with an installation hole 206 that communicates with the sealing groove 204, and the bottom of the sealing cover 201 is provided with a sealing element 207 for sealing the installation hole 206.

[0042] When installing the sealing ring 205 into the sealing groove 205, the air in the sealing groove 205 can be discharged through the mounting hole 206. This ensures that the sealing ring 205 fits tightly into the sealing groove 205, facilitating the installation of the sealing ring 205. The sealing element 207 can be used to seal the mounting hole 206 to prevent gas leakage through the mounting hole 206. The top of the sealing ring 205 can be removed by inserting a rod-shaped object into the sealing groove 204 through the mounting hole 206, making it easy to replace.

[0043] During the installation of the sealing ring 205 into the sealing groove 204, the air inside the groove can be effectively discharged through the mounting hole 206, which helps the sealing ring 205 to fit tightly against the inner wall of the sealing groove 204 and also reduces installation resistance. After the sealing ring is installed in place, the mounting hole 206 is sealed by the sealing element 207 to prevent the test gas from leaking from the mounting hole 206. When it is necessary to replace the sealing ring 205, the operator can insert a rod-shaped object into the sealing groove 204 through the mounting hole 206 to push out the sealing ring 205, thereby facilitating the replacement of the sealing ring 205.

[0044] Specifically, the seal 207 includes a sealing sleeve 207a fixed to the bottom of the sealing cap 201, the opening at the bottom of the mounting hole 206 is located inside the sealing sleeve 207a, and a removable sealing cap 207b is threaded onto the bottom of the sealing sleeve 207a.

[0045] The sealing cap 207b can be rotatably removed from the sealing sleeve 207a, allowing air in the annular groove 203 to be discharged through the mounting hole 206. After the sealing ring 205 is installed in the sealing groove 204, the sealing cap 207b is rotatably installed on the bottom of the sealing sleeve 207a to seal the sealing sleeve 207a and prevent gas from leaking through the mounting hole 206 during testing.

[0046] Example 3

[0047] Reference Figure 1 and Figure 2 This is the third embodiment of the present invention. Unlike the previous embodiment, the pneumatic rotating assembly 302 includes a connecting rod 302a fixedly connected to the side wall of the jet pipe 301. The bottom end of the connecting rod 302a is rotatably connected to a rotating rod 302b. The side wall of the rotating rod 302b is fixedly connected to multiple annularly distributed deflection plates 302c.

[0048] When a gas leak occurs, the gas will be discharged through the end of the jet pipe 301 and blown toward the deflector plate 302c. This causes the multiple deflector plates 302c to rotate the rotating rod 302b under the influence of the gas, visually alerting the operator that a gas leak has occurred during the testing process.

[0049] It should be noted that the connecting rod 302a is inclined, and the rotating rod 302b is not located on the axis of the jet pipe 301.

[0050] The gas discharged from the jet pipe 301 is not directly aimed at the rotating rod 302b, but acts on the corresponding deflection plate 302c. This structural design enables the gas flow to generate a more significant driving force on the deflection plate 302c and promotes the rotation of the rotating rod 302b, thereby improving the sensitivity of gas leak detection.

[0051] Example 4

[0052] Reference Figure 1 and Figure 2 This is the fourth embodiment of the present utility model. Unlike the previous embodiment, the outer wall of the jet pipe 301 is fitted with a windshield 303. The windshield 303 is transparent, and the pneumatic rotating component 302 is located inside the windshield 303.

[0053] The movement of the pneumatic rotating component 302 inside can be observed through the transparent windshield 303. The windshield 303 is used to protect the pneumatic rotating component 302 and prevent external factors from interfering with the detection of gas flow by the jet pipe 301 and the pneumatic rotating component 302.

[0054] In addition, a whistle 304 is provided on the outer wall of the jet pipe 301. Part of the gas flowing inside the jet pipe 301 is leaked out through the whistle 304. The whistle 304 can generate a specific sound signal when the gas leaks.

[0055] When gas leaks, some of the gas in the jet pipe 301 leaks out from the whistle 304, causing the whistle 304 to emit a sound. The greater the gas leak, the louder the sound emitted by the whistle 304, so as to cooperate with the pneumatic rotating assembly 302 to provide a more reliable leak detection method.

[0056] During use, the sealing cap 201 is secured to the air inlet end of the safety valve body 100 by tightening bolts and nuts. The sealing ring 205 is used to improve the sealing between the sealing cap 201 and the safety valve body 100. Then, the connector 202 is connected to the air pump pipeline, and air is gradually supplied to the safety valve body 100 to pressurize it. When the seal between the sealing cap 201 and the safety valve body 100 fails, the leaked gas will pass through the sealing ring 205 and leak into the annular groove 203, and then enter the jet pipe 3 from the annular groove 203. Inside 01, at this time, some gas in the jet pipe 301 leaks out from the whistle 304, causing the whistle 304 to make a sound. In addition, the gas ejected from the end of the jet pipe 301 blows towards the deflector plate 302c, causing multiple deflector plates 302c to rotate the rotating rod 302b under the blowing of the gas, so as to remind the operator, audibly and visually, that the sealing cover 201 is not securely fixed to the safety valve body 100. When the pneumatic rotating assembly 302 is triggered, the test is stopped and the sealing cover 201 is removed.

[0057] By rotating the sealing cap 207b off the sealing sleeve 207a, the operator can insert a rod-shaped object into the sealing groove 204 through the mounting hole 206 to push out the sealing ring 205 and replace the sealing ring 205. After replacement, the sealing cap 207b is rotated and installed on the bottom of the sealing sleeve 207a to seal the sealing sleeve 207a. Then, the sealing cap 201 is fixed to the air inlet end of the safety valve body 100. When the pneumatic rotating assembly 302 and the whistle 304 are no longer triggered, the sealing cap 201 seals the air inlet end of the safety valve body 100 to ensure the accuracy of the sealing test.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A safety valve sealing test plug, characterized in that, include: Safety valve body (100); A plugging unit (200) includes a plugging cover (201), which is fixed to the gas supply end of the safety valve body (100) by bolts and nuts, and the top of the plugging cover (201) is provided with an annular groove (203) for gas to enter. The leakage warning unit (300) includes a jet pipe (301) fixedly connected to the side wall of the sealing cover (201), one end of the jet pipe (301) passing through and communicating with the annular groove (203) of the sealing cover (201), and the leakage warning unit (300) further includes a pneumatic rotating assembly (302) for detecting gas flow in the jet pipe (301).

2. The safety valve sealing test plug according to claim 1, characterized in that: The top of the sealing cap (201) is provided with a sealing groove (204) with a diameter smaller than that of the annular groove (203). A detachable sealing ring (205) is slidably provided in the sealing groove (204), and the sealing ring (205) protrudes from the surface of the sealing cap (201).

3. The safety valve sealing test plug according to claim 2, characterized in that: The bottom of the sealing cap (201) is provided with an installation hole (206) that communicates with the sealing groove (204), and the bottom of the sealing cap (201) is provided with a sealing element (207) for sealing the installation hole (206).

4. The safety valve sealing test plug according to claim 3, characterized in that: The seal (207) includes a sealing sleeve (207a) fixed to the bottom of the sealing cap (201), the opening at the bottom of the mounting hole (206) is located inside the sealing sleeve (207a), and a removable sealing cap (207b) is threaded onto the bottom of the sealing sleeve (207a).

5. The safety valve sealing test plug according to claim 1, characterized in that: The pneumatic rotating assembly (302) includes a connecting rod (302a) fixedly connected to the side wall of the jet pipe (301), and a rotating rod (302b) is rotatably connected to the bottom end of the connecting rod (302a). A plurality of annularly distributed deflection plates (302c) are fixedly connected to the side wall of the rotating rod (302b).

6. The safety valve sealing test plug according to claim 5, characterized in that: The connecting rod (302a) is inclined, and the rotating rod (302b) is not located on the axis of the jet pipe (301).

7. The safety valve sealing test plug according to claim 6, characterized in that: The outer wall of the jet pipe (301) is fitted with a windshield (303), which is transparent, and the pneumatic rotating assembly (302) is located inside the windshield (303).

8. The safety valve sealing test plug according to claim 7, characterized in that: The outer wall of the jet pipe (301) is provided with a whistle (304), through which part of the gas flowing inside the jet pipe (301) is released.

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