Gas pipeline airtightness detection instrument

Abstract

The utility model discloses a gas pipeline airtightness detection instrument, relates to the technical field of gas pipeline airtightness detection, and aims to solve the problems that in the prior art, a temporary interface or a special joint is used for connecting a gas pipeline and a gas pipeline airtightness detection instrument, the detection cost is increased, and the detection efficiency is reduced. Comprising an airtightness detection instrument body used for detecting the gas pipeline and a gas inlet and outlet pipe of the airtightness detection instrument body, a fixing sleeve is fixedly connected to the outer wall of the gas inlet and outlet pipe, a fixing ring is fixedly connected to the inner end wall of the fixing sleeve, two rows of storage grooves are fixedly connected to the inner wall of the fixing ring, and extrusion plates corresponding to the storage grooves are arranged in the storage grooves respectively. And the extrusion plates are of semicircular structures, linkage rods are fixedly connected to the outer surfaces of the extrusion plates, and the other ends of the linkage rods penetrate through the fixing rings and are in sliding connection with the inner walls of the penetrated positions of the linkage rods. The device has the advantages that the detection cost is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas pipeline airtightness testing technology, and more specifically, to a gas pipeline airtightness testing instrument. Background Technology

[0002] Gas leak testing is an important safety measure. Gas is a flammable and explosive gas. If a pipeline leaks, it will not only lead to waste of resources, but may also cause serious accidents such as fires and explosions. Therefore, gas leak testing can detect even the smallest leaks in the pipeline in time, ensuring the sealing and safety of the pipeline system.

[0003] During the gas tightness testing of gas pipelines, the connection between the pipeline and the inlet and outlet gas pipes of the testing instrument often faces a series of technical challenges. For example, since the end of the gas pipeline is not convenient to directly connect to the testing instrument, technicians often need to use temporary interfaces, special connectors and other methods to achieve the connection. However, the installation and disassembly process of temporary interfaces or special connectors is cumbersome and the reuse rate is low. This results in the gas tightness testing of gas pipelines not only increasing the testing cost, but also reducing the testing efficiency. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a gas pipeline airtightness testing instrument to solve the problem that the use of temporary interfaces or special connectors to connect gas pipelines and airtightness testing instruments in the existing technology not only increases the testing cost but also reduces the testing efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a gas pipeline airtightness testing instrument, including an instrument body for testing gas pipelines and its inlet and outlet pipes, a fixed sleeve is fixedly connected to the outer wall of the inlet and outlet pipes, a fixed ring is fixedly connected to the inner end wall of the fixed sleeve, two rows of receiving grooves are fixedly connected to the inner wall of the fixed ring, and a corresponding extrusion plate is provided in each of the receiving grooves. The extrusion plate has a semi-circular structure, and a linkage rod is fixedly connected to the outer surface of each extrusion plate. The other end of the linkage rod passes through the fixed ring and is slidably connected to the inner wall of the penetrating part. A push-pull mechanism for pushing and pulling the linkage rod is provided inside the fixed sleeve.

[0006] The push-pull mechanism includes an adjusting ring rotatably connected to the inner wall of the fixed sleeve. The outer wall of the fixed sleeve has an adjusting groove through which it passes. The inner wall of the adjusting ring is fixedly connected with a plurality of push-pull rings corresponding to the storage grooves. The inner surface of the push-pull ring has an arc-shaped structure. The end of the linkage rod away from the extrusion plate is rotatably connected to a rotating rod. The rotating rod is located in the middle of the push-pull ring and abuts against the inner surface of its arc-shaped structure.

[0007] Preferably, the storage slots in each row are staggered, and the extrusion plates are staggered in relation to the storage slots, with the ends of the staggered extrusion plates fitting together.

[0008] Preferably, the inner surface of the push-pull ring is recessed to form a fitting portion, which corresponds to the rotating rod.

[0009] Preferably, a pull rod is fixedly connected to the outer wall of the adjusting ring, and the other end of the pull rod extends through the adjusting groove to the outside of it.

[0010] Preferably, the outer edge of the inlet / outlet pipe gradually tapers in an arc towards the middle, and the outer wall of the tapped inlet / outlet pipe is used to guide the gas pipeline.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model comprises an airtightness testing instrument body, inlet and outlet pipes, a fixing sleeve, a fixing ring, a storage groove, a squeezing plate, a linkage rod, and a push-pull mechanism. By inserting the inlet and outlet pipes into a gas pipeline, and then twisting the adjusting ring, the adjusting ring controls the squeezing plate to move the gas pipeline closer through the push-pull mechanism. The inlet and outlet pipes squeeze the end of the gas pipeline between them, thereby fixing and sealing the end of the gas pipeline. This allows the airtightness testing instrument body to perform airtightness testing on the gas pipeline. After the test is completed, simply twisting the adjusting ring in the opposite direction resets the squeezing plate and releases the gas pipeline. This makes the entire gas pipeline testing process simple and convenient, reduces testing costs, and increases testing efficiency.

[0013] 2. In this utility model, the storage slots in each row are arranged in an alternating pattern, and the extrusion plates are arranged in an alternating pattern corresponding to the storage slots. This allows the extrusion plates to squeeze the gas pipe in an alternating manner when they are close to it, reducing the dead angles generated when the extrusion plates squeeze the gas pipe and increasing the sealing effect of the extrusion plates on the gas pipe. Furthermore, the ends of the alternating extrusion plates fit together, which can further reduce the extrusion dead angles and increase the sealing effect.

[0014] 3. In this utility model, the inner surface of the push-pull ring forms a corresponding fitting groove that allows the rotating rod to be embedded in the fitting groove. This allows the fitting groove to have a certain limiting effect on the rotating rod, increasing the stability of the adjusting ring after rotation. This, in turn, increases the stability of the gas pipeline when the adjusting ring rotates and drives the extrusion plate to extrude gas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2This is a schematic diagram of the inlet and outlet air pipes in this utility model;

[0017] Figure 3 This is a cross-sectional view of the adjusting ring in this utility model;

[0018] Figure 4 for Figure 3 Enlarged view of section A in the image;

[0019] Figure 5 This is a schematic diagram of the structure of the extrusion plate in this utility model;

[0020] Figure 6 This is a schematic diagram of one usage state of the present invention.

[0021] Explanation of the labels in the diagram:

[0022] 1. Air tightness testing instrument body; 2. Inlet and outlet air pipes; 3. Fixing sleeve; 4. Fixing ring; 5. Storage groove; 6. Squeezing plate; 7. Linkage rod; 8. Adjusting ring; 9. Adjusting groove; 10. Push-pull ring; 11. Rotating rod; 12. Fitting part; 13. Pull rod. Detailed Implementation

[0023] like Figures 1 to 6 As shown, this utility model relates to a gas pipeline airtightness testing instrument, including an instrument body 1 for testing gas pipelines and an inlet / outlet pipe 2. A fixing sleeve 3 is fixedly connected to the outer wall of the inlet / outlet pipe 2. A fixing ring 4 is fixedly connected to the inner end wall of the fixing sleeve 3. Two rows of receiving grooves 5 are fixedly connected to the inner wall of the fixing ring 4. Each receiving groove 5 is provided with a corresponding extrusion plate 6. The extrusion plate 6 has a semi-circular structure, and a linkage rod 7 is fixedly connected to the outer surface of each extrusion plate 6. The other end of the linkage rod 7 passes through the fixing ring 4 and is slidably connected to the inner wall of the penetrating part. A push-pull mechanism for pushing and pulling the linkage rod 7 is provided inside the fixing sleeve 3.

[0024] The push-pull mechanism includes an adjusting ring 8 rotatably connected to the inner wall of the fixed sleeve 3. The outer wall of the fixed sleeve 3 has an adjusting groove 9 through which it passes. The inner wall of the adjusting ring 8 is fixedly connected with a plurality of push-pull rings 10 corresponding to the storage grooves 5. The inner surface of the push-pull ring 10 is an arc-shaped structure. The end of the linkage rod 7 away from the extrusion plate 6 is rotatably connected with a rotating rod 11. The rotating rod 11 is located in the middle of the push-pull ring 10 and abuts against the inner surface of its arc-shaped structure.

[0025] Specifically, the gas pipeline to be tested is taken and brought close to the inlet / outlet pipe 2, so that the end of the inlet / outlet pipe 2 is inserted into the gas pipeline. Then, by twisting the adjusting ring 8, the adjusting ring 8 drives the push-pull ring 10 to twist together. During the twisting process, the inner surface of the arc-shaped structure of the push-pull ring 10 pushes the rotating rod 11, which in turn pushes the linkage rod 7. This causes the linkage rod 7 to move the compression plate 6, which then compresses the gas pipeline. The compression plate 6 cooperates with the inlet / outlet pipe 2 to fix and seal the end of the gas pipeline, thus allowing the gas tightness testing instrument body 1 to perform gas tightness testing on the gas pipeline. After the test is completed, the adjusting ring 8 is twisted in the opposite direction, and the inner surface of the push-pull ring 10 pulls the rotating rod 11, causing the compression plate 6 to reset and release the gas pipeline. This makes the entire gas pipeline testing process simple and convenient, reduces testing costs, and increases testing efficiency.

[0026] Furthermore, the storage slots 5 in each row are staggered, and the extrusion plates 6 are staggered in relation to the storage slots 5, with the ends of the staggered extrusion plates 6 fitting together.

[0027] Specifically, the storage slots 5 are arranged in an alternating pattern, and the extrusion plates 6 are arranged in an alternating pattern corresponding to the storage slots 5. This allows the extrusion plates 6 to squeeze the gas pipe in an alternating manner when they are close to it, reducing the dead angles generated when the extrusion plates 6 squeeze the gas pipe and increasing the sealing effect of the extrusion plates 6 on the gas pipe. Furthermore, the ends of the alternating extrusion plates 6 fit together, which can further reduce the extrusion dead angles and increase the sealing effect.

[0028] Furthermore, the inner surface of the push-pull ring 10 is recessed to form a fitting portion 12, which corresponds to the rotating rod 11;

[0029] Specifically, the fitting groove formed on the inner surface of the push-pull ring 10, which corresponds to the rotating rod 11, allows the rotating rod 11 to be embedded in the fitting groove. This allows the fitting groove to have a certain limiting effect on the rotating rod 11, increasing the stability of the adjusting ring 8 after rotation. This, in turn, increases the stability of the gas pipeline when the adjusting ring 8 rotates and drives the extrusion plate 6 to extrude gas.

[0030] Furthermore, a pull rod 13 is fixedly connected to the outer wall of the adjusting ring 8, and the other end of the pull rod 13 extends through the adjusting groove 9 to its outside.

[0031] Specifically, the pull rod 13 allows staff to control the torsion of the adjusting ring 8 by pulling the pull rod 13, increasing the convenience of torsion adjustment ring 8.

[0032] Furthermore, the outer edge of the end of the inlet / outlet pipe 2 gradually tapers in an arc shape towards the middle, and the outer wall of the inlet / outlet pipe 2 after the taper is used to guide the gas pipeline.

[0033] Specifically, the outer edge of the end of the inlet / outlet pipe 2 gradually tapers in an arc towards the middle, so that when the inlet / outlet pipe 2 is inserted into the end of the gas pipeline, the outer wall of the inlet / outlet pipe 2 after the contraction can guide the gas pipeline, making it easier for the inlet / outlet pipe 2 to be inserted into the end of the gas pipeline.

[0034] Working Principle: This embodiment provides a gas pipeline airtightness testing instrument. The gas pipeline to be tested is taken and brought close to the inlet / outlet pipe 2, allowing the end of the inlet / outlet pipe 2 to be inserted into the gas pipeline. Then, by twisting the adjusting ring 8, the adjusting ring 8 drives the push-pull ring 10 to twist together. During the twisting process, the inner surface of the arc-shaped structure of the push-pull ring 10 pushes the rotating rod 11, causing the rotating rod 11 to push the linkage rod 7. This causes the linkage rod 7 to move the compression plate 6, which then compresses the gas pipeline. The compression plate 6, in conjunction with the inlet / outlet pipe 2, fixes and seals the end of the gas pipeline, allowing the airtightness testing instrument body 1 to deliver test gas into the gas pipeline through the inlet / outlet pipe 2 for airtightness testing. After the test is completed, simply twisting the adjusting ring 8 in the opposite direction pulls the inner surface of the push-pull ring 10 against the rotating rod 11, causing the compression plate 6 to reset and release the gas pipeline. This makes the entire gas pipeline testing process simple and convenient, reduces testing costs, and increases testing efficiency.

[0035] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A gas pipeline airtightness testing instrument, comprising an instrument body (1) for testing the airtightness of a gas pipeline and its inlet and outlet gas pipes (2), characterized in that, A fixing sleeve (3) is fixedly connected to the outer wall of the air inlet / outlet pipe (2). A fixing ring (4) is fixedly connected to the inner end wall of the fixing sleeve (3). Two rows of storage slots (5) are fixedly connected to the inner wall of the fixing ring (4). Each storage slot (5) is provided with a corresponding extrusion plate (6). The extrusion plate (6) has a semi-circular structure. A linkage rod (7) is fixedly connected to the outer surface of the extrusion plate (6). The other end of the linkage rod (7) passes through the fixing ring (4) and is slidably connected to the inner wall of the point through which it is passed. A push-pull mechanism for pushing and pulling the linkage rod (7) is provided inside the fixing sleeve (3).

2. The gas pipeline airtightness testing instrument according to claim 1, characterized in that, The push-pull mechanism includes an adjusting ring (8) rotatably connected to the inner wall of the fixed sleeve (3). The outer wall of the fixed sleeve (3) has an adjusting groove (9) through which it passes. The inner wall of the adjusting ring (8) is fixedly connected with a plurality of push-pull rings (10) corresponding to the storage groove (5). The inner surface of the push-pull ring (10) is an arc-shaped structure. The end of the linkage rod (7) away from the extrusion plate (6) is rotatably connected with a rotating rod (11). The rotating rod (11) is located in the middle of the push-pull ring (10) and abuts against the inner surface of its arc-shaped structure.

3. The gas pipeline airtightness testing instrument according to claim 2, characterized in that, The storage slots (5) in each row are arranged alternately, and the extrusion plates (6) are arranged alternately in relation to the storage slots (5), and the ends of the alternately arranged extrusion plates (6) are in contact with each other.

4. The gas pipeline airtightness testing instrument according to claim 3, characterized in that, The inner surface of the push-pull ring (10) is recessed to form a fitting part (12), which corresponds to the rotating rod (11).

5. A gas pipeline airtightness testing instrument according to claim 2, characterized in that, A pull rod (13) is fixedly connected to the outer wall of the adjusting ring (8), and the other end of the pull rod (13) extends through the adjusting groove (9) to its outside.

6. The gas pipeline airtightness testing instrument according to claim 1, characterized in that, The outer edge of the inlet / outlet pipe (2) gradually tapers in an arc shape towards the middle, and the outer wall of the inlet / outlet pipe (2) after the taper is used to guide the gas pipeline.

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