Leakage detection device for leakage detection of buried natural gas pipeline

Abstract

The utility model relates to a leakage detection device for buried natural gas pipeline leakage detection, which comprises a natural gas leakage detection pipe body and an external thread pipe plug, gas holes are uniformly distributed on the natural gas leakage detection pipe body, and an internal thread straight joint is arranged at one end of the natural gas leakage detection pipe body; and the external thread pipe plug is positioned at the top end of the detection pipe and is in threaded connection with the internal thread straight connector in the pipe body. The leakage detection device is used for detecting and timely finding the leakage condition of the buried natural gas pipeline, and potential safety hazards are eliminated. The leakage detection device is simple in structure, low in cost and convenient to construct, the pipe body is made of PP-R materials, the external thread pipe plug is made of carbon steel materials, if the buried natural gas pipeline is damaged, leaked natural gas can enter the PP-R pipeline to be gathered through the air holes in the pipe body of the leakage detection device, inspection personnel can conveniently find and process the damaged natural gas in the first time, and the leakage detection efficiency is improved. And safe operation of the gas pipeline is ensured.

Description

Technical Field

[0001] The utility model relates to a leak detection device for buried natural gas pipelines, and is particularly applicable to the situations where gas leak detection pipes need to be set at important crossing sections of gas pipelines, steel-plastic conversion joints, sections near the gas pipelines where gas leakage has occurred, and areas with dense population and sensitive environment, etc. Background Art

[0002] Urban gas pipe networks are important infrastructure for ensuring residents' lives. However, with the acceleration of urbanization and the increase in gas consumption, potential safety hazards in gas pipe networks are becoming increasingly prominent. Problems such as aging, corrosion, and deformation of underground gas pipelines occur from time to time. In particular, gas pipelines near steel-plastic conversion joints in communities are prone to leakage and fracture, posing a threat to the surrounding environment and the lives and property of urban residents.

[0003] Inspection of natural gas pipelines is crucial for ensuring the safe operation of natural gas pipelines. Through inspection, potential safety hazards can be discovered and handled in a timely manner to prevent accidents. Regular inspection can also provide data support for the maintenance and upkeep of pipelines, extending the service life of pipelines. Inspection of underground gas pipelines often involves checking the content of harmful gases in underground structures (such as valve wells, pipe trenches, etc.) near the pipelines, or drilling holes near the gas pipelines, taking gas samples and analyzing them with a gas indicator to determine whether there is gas leakage. However, repeated drilling each time is time-consuming and laborious, increasing economic costs, and will also have a disturbing impact on the operating gas pipelines. The change of the detection position each time will also affect the results of pipeline operation and maintenance data.

[0004] And this new type of leak detection device for buried natural gas pipelines can be implemented synchronously during the construction of gas pipelines, permanently set near the gas pipelines, uniformly painted with yellow identification paint, avoiding re-excavation and drilling later, with low cost, simple installation, and will not damage the gas pipelines. If the nearby buried natural gas pipeline is damaged, the leaked natural gas will enter the PP-R pipeline through the air holes on the body of the leak detection device and accumulate, facilitating the inspection personnel to discover and handle it in a timely manner, ensuring the safe operation of the gas pipeline. Summary of the Invention

[0005] The problem to be solved by the utility model is to provide a leak detection device for buried natural gas pipeline leakage detection, which can be used for detecting gas leakage in gas pipelines at important crossing sections of gas pipelines, steel-plastic conversion joints, sections near the gas pipelines where gas leakage has occurred, and areas with dense population and sensitive environment, etc.

[0006] The technical solution of the present utility model is: A leak detection device for buried natural gas pipelines, comprising a natural gas leak detection pipe body and an external thread pipe plug. The natural gas leak detection pipe body is evenly provided with air holes, and one end of the natural gas leak detection pipe body is provided with an internal thread socket; The external thread pipe plug is located at the top of the detection pipe and is threadedly connected to the internal thread socket.

[0007] The internal thread socket and the natural gas leak detection pipe body are connected by hot melt socket connection, and the external thread pipe plug is threadedly connected to the internal thread socket inside the pipe body.

[0008] The natural gas leak detection pipe body is made of PP-R material, and the external thread pipe plug is made of carbon steel material.

[0009] A sealing material is provided between the external thread pipe plug and the internal thread socket, and the sealing material is located at the connection where the external thread pipe plug is threadedly connected to the internal thread socket. The sealing material uses polytetrafluoroethylene tape.

[0010] The pipe body is made of a whole piece of pipe material, and there should be no interface in the middle. The external thread pipe plug should be painted with yellow identification paint, that is, a yellow identification paint layer is painted on the outer wall of the external thread pipe plug.

[0011] The present utility model is used for leak detection of buried natural gas pipelines, to check and timely discover the leakage situation of buried natural gas pipelines. If the nearby buried natural gas pipeline is damaged, the leaked natural gas will enter the natural gas leak detection pipeline through the air holes on the natural gas leak detection pipe body of the present utility model and gather, facilitating the inspection personnel to discover and handle it in the first time, and ensuring the safe operation of the gas pipeline.

[0012] With a simple structure, the present utility model can be permanently set near the existing gas pipelines, uniformly painted with yellow identification paint, with low cost and simple installation, and can be widely promoted and applied in projects, preventing big risks with small costs.

[0013] The beneficial effects of the present utility model are: simple structure, low cost, and convenient construction. Description of the Drawings

[0014] Figure 1 is the installation schematic diagram of the present utility model;

[0015] Figure 2 is the structural schematic diagram of the present utility model;

[0016] Figure 3 is the pipe body structural schematic diagram of the present utility model. Detailed Embodiment

[0017] See Figures 1 to 3, the leak detection device of the present utility model includes a natural gas leak detection pipe body 1 and an external thread pipe plug 2. Symmetrical air holes 3 with a diameter of 5 mm are drilled axially at intervals of 50 mm on the natural gas leak detection pipe body 1. Two adjacent groups of air holes form a 90° included angle radially. An internal thread socket 4 is provided inside one end of the natural gas leak detection pipe body 1; the external thread pipe plug 2 is located at the top of the detection pipe body 1 and is connected to the internal thread socket 4.

[0018] The internal thread socket 4 and the detection pipe body 1 are connected by hot melt socket welding, and the external thread pipe plug 2 and the internal thread socket 4 are connected by screw threads.

[0019] The natural gas leak detection pipe body 1 is made of PP-R material (DN20), and the external thread pipe plug 2 is made of carbon steel material (DN20).

[0020] The sealing material for the screw thread connection adopts polytetrafluoroethylene tape.

[0021] The detection pipe body 1 is made of a whole pipe, and there should be no interface in the middle. The external thread pipe plug 2 should be painted with yellow identification paint.

[0022] The external thread pipe plug 2 of the leak detection device of the present utility model is about 100 - 300 mm higher than the outdoor ground. The lower end of the external thread pipe plug 2 is flush with the upper end of the ground outlet casing 8, and it is generally implemented synchronously with the construction of the gas pipeline. Since the steel-plastic conversion joint 6 is the most prone to leakage and fracture, the natural gas leak detection pipe body 1 of the present utility model is arranged near the steel-plastic conversion joint 6. When the buried gas pipeline (polyethylene pipe) 5 is converted into a gas pipeline (steel pipe) 7 through the steel-plastic conversion joint 6, it is laid in the ground outlet casing 8 and then installed by climbing along the building exterior wall 9. The natural gas leak detection pipe body 1 is laid along with the buried gas pipeline and is close to the buried gas pipeline, and is laid in the ground outlet casing 8 together with the gas pipeline (steel pipe) 7.

[0023] The operation of the present utility model is simple. The gas pipeline inspection personnel conduct regular inspections. Before detection, unscrew the external thread pipe plug 2 of the gas leak detection, insert the probe of the portable gas detector into the detection pipe body 1, check the detection result of the combustible gas detector, record the gas concentration reading, and then tighten the external thread pipe plug 2. If there is gas leakage, handle it immediately to eliminate potential safety hazards.

[0024] The leak detection device of the present utility model has a simple structure, low cost, convenient construction, beautiful installation, and is economical and practical.

Claims

1. A leak detection device for buried natural gas pipeline leakage detection, characterized in that: It includes a natural gas leakage detection pipe body and an external thread pipe plug. The natural gas leakage detection pipe body is evenly distributed with air holes, and one end of the natural gas leakage detection pipe body is provided with an internal thread union; the external thread pipe plug is located at the top of the detection pipe and is threadedly connected with the internal thread union.

2. The leak detection device for buried natural gas pipeline leakage detection according to claim 1, characterized in that: The internal thread union and the natural gas leakage detection pipe body are connected by hot melt socket connection.

3. The leak detection device for buried natural gas pipeline leakage detection according to claim 1 or 2, characterized in that: The natural gas leakage pipe body is made of PP-R material, and the external thread pipe plug is made of carbon steel material.

4. The leak detection device for buried natural gas pipeline leakage detection according to claim 1 or 2, characterized in that: A sealing material is provided between the external thread pipe plug and the internal thread union, and the sealing material is located at the connection where the external thread pipe plug and the internal thread union are threadedly connected.

5. The leak detection device for buried natural gas pipeline leakage detection according to claim 4, characterized in that: The sealing material uses polytetrafluoroethylene tape.

6. The leak detection device for buried natural gas pipeline leakage detection according to claim 1 or 2, characterized in that: The natural gas leakage detection pipe body is made of a whole pipe material, and the outer wall of the external thread pipe plug is coated with a yellow identification paint layer.

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