A buried gas pipeline detection device

Abstract

The utility model discloses a kind of buried gas pipeline detection devices, and excavation repair point is provided along the laying direction of buried gas pipeline, detection device includes the leakage detection pipe at excavation repair point, the leakage detection pipe extends from buried gas pipeline to ground, end cap for plugging leakage detection pipe is provided on ground, recess is opened on the end cap to facilitate its removal from ground;The utility model has the beneficial effects that: by the setting of leakage detection pipe, the leaked gas (if there is leakage) can quickly spread to ground along the pipeline, facilitate detection, improve detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of safe gas transmission technology, and in particular to a detection device for underground gas pipelines. Background Technology

[0002] Currently, most existing buried PE gas pipelines use an insulated metal cable laid along the same trench as the pipeline as a tracer. Metal-based pipeline detection equipment is used to locate the tracer and indicate the location of the buried PE pipeline, facilitating its location and depth without excavation. However, during actual operation, the tracer often breaks due to pipeline network contact, third-party damage, etc. Even after reconnection and insulation, soil erosion, electrochemical corrosion, and other factors can easily cause oxidation at the tracer joints. This leads to signal dissipation at the interface when using metal-based pipeline detection equipment, making it impossible to pinpoint the pipeline's exact location. Furthermore, secondary construction at pipeline connections significantly increases the probability of future leaks. Currently, there is no device that can directly detect buried leaks without excavation.

[0003] During the design phase of buried gas pipeline detection devices, the current carrying capacity, safety performance, and ease of use of the tracer wires need to be tested to ensure the quality of pipeline location and leak detection. Based on the requirements of buried pipeline detection, when using metal-based pipeline detection equipment to detect tracer wires, the cable signal loaded within the tracer wire must be a safe voltage not exceeding 36V. However, the current frequency must be a specific detectable frequency. Typical tracer wire interfaces are simply connected underground, and corrosion and oxidation often cause the current frequency to attenuate, rendering it undetectable and affecting detection accuracy. Furthermore, gas leaks are highly likely to occur at excavated repair points due to secondary welding, and the restoration of the surface with asphalt concrete makes it difficult to directly detect pipeline leaks at repair points from the ground.

[0004] Patent application number CN202411503610.3 discloses an "active matrix online monitoring system for underground gas pipeline leakage and its monitoring method for gas leakage," which can monitor gas leakage in underground gas pipelines along railway sections in real time and issue alarm signals promptly. However, the system has a relatively complex structure and high operating costs, affecting its practical application. Summary of the Invention

[0005] The purpose of this invention is to provide a buried gas pipeline detection device that solves the current industry problems in the location detection and leakage detection of buried gas PE pipelines.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A buried gas pipeline detection device includes excavation and repair points along the laying direction of the buried gas pipeline. The detection device includes a leak detection pipe located at the excavation and repair point. The leak detection pipe extends from the buried gas pipeline to the ground, and an end cap for sealing the leak detection pipe is provided on the ground.

[0007] Preferably, the end cap has a groove for easy removal from the ground.

[0008] Preferably, the detection device further includes a gas tracer line extending along the laying direction of the buried gas pipeline, and the inner wall of the end cap is provided with a terminal block connected to the gas tracer line.

[0009] Preferably, the inner wall of the end cap is provided with a sealing cap for sealing the leakage detection tube.

[0010] Preferably, the terminal block is mounted on the sealing cover.

[0011] Preferably, the leak detection tube is made of PVC and has an inner diameter of 1 cm.

[0012] Preferably, the terminal block is made of metal.

[0013] Preferably, the inner diameter of the sealing cap is the same as the outer diameter of the leak detection tube.

[0014] The beneficial effects of this utility model are as follows: 1. By installing a leak detection pipe, leaked gas (if there is a leak) can quickly spread along the pipe to the ground, making it easy to detect and improving detection efficiency.

[0015] 2. The groove design allows for quick removal of the end cap and exposure of the terminals on hard surfaces, thereby enabling connection to the gas tracer wire and improving detection efficiency.

[0016] 3. After removing the end cap, the leak detection tube can be exposed. The leak detection tube is made of PVC, with an inner diameter of 1cm and a hollow structure. This material is corrosion-resistant, inexpensive, and easy to install. The bottom opening of the leak detection tube can collect a certain amount of underground gas, allowing handheld leak detection equipment to be used to detect leaks through the leak detection cap to determine if there is a gas leak. Attached Figure Description

[0017] Figure 1 This is the main view of this application.

[0018] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings.

[0020] Example 1 like Figure 1 As shown in this embodiment, a buried gas pipeline detection device is provided. In the prior art, the buried gas pipeline 1 is generally buried at a depth of about 1.5 meters underground. An excavation and repair point (i.e., the arrow position in the figure) is set along the laying direction of the buried gas pipeline 1. Because this point has undergone repairs and involves secondary welding of the pipeline, compared with the original pipeline, this point involves not only aging leaks but also weld leaks. Therefore, this point is a vulnerable point of the buried gas pipeline 1 and requires close monitoring of leaks. The detection device includes a leak detection pipe 7 located at the excavation and repair point. The leak detection pipe 7 extends from the depth of the upper end face of the buried gas pipeline 1 towards the ground. Thus, if a gas leak occurs at the excavation and repair point, the leaked gas will flow upwards along the inner hole of the leak detection pipe 7. An end cap 2 for sealing the leak detection pipe 7 is provided on the ground.

[0021] The end cap 2 has a groove 6 for easy removal from the ground. During installation, the upper surface of the end cap 2 is flush with the hard ground, and the groove 6 can be gripped with needle-nose pliers to quickly remove the end cap 2.

[0022] The detection device also includes a gas tracer line 3 extending along the laying direction of the underground gas pipeline 1, and a terminal block 4 connected to the gas tracer line 3 is provided on the inner wall of the end cap 2.

[0023] A sealing cap 5 for sealing the leakage detection tube 7 is also provided on the inner wall of the end cap 2.

[0024] In this embodiment, the terminal 4 is mounted on the sealing cap 5. The terminal is made of metal; removing the end cap 2 exposes the terminal 4, facilitating the connection between the gas tracer wire 3 and the terminal 4, thus improving detection efficiency. The inner diameter of the sealing cap 5 is the same as the outer diameter of the leak detection pipe 7. When the end cap 2 is fastened to the ground, the sealing cap 5 can form a complete seal on the leak detection pipe 7. When the end cap 2 is removed, the leaked gas (if there is a leak) can quickly spread along the pipe to the ground for detection.

[0025] In this embodiment, the leak detection tube 7 is made of PVC, a material that is corrosion-resistant, low-cost, easy to install, and convenient to connect with the sealing cap 5. The inner diameter of the leak detection tube 7 is 1 cm to facilitate the flow of gas.

[0026] In this embodiment, the end cap 2 has a diameter of 10cm and a height of 5cm, which can be quickly opened and tracer wire connected on hard ground; the sealing cap 5 can prevent water, mud and other debris from clogging the leakage detection tube. This design makes the connection more reliable, which not only ensures the safety of operation, but also facilitates positioning and detection.

[0027] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify 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. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0029] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A buried gas pipeline inspection device, comprising excavation and repair points set along the laying direction of the buried gas pipeline, characterized in that, The detection device includes a leak detection pipe located at the excavation and repair point, which extends from the buried gas pipeline to the ground, and an end cap for sealing the leak detection pipe is installed on the ground.

2. The underground gas pipeline detection device according to claim 1, characterized in that, The end cap has a groove for easy removal from the ground.

3. The underground gas pipeline detection device according to claim 1, characterized in that, It also includes a gas tracer line extending along the laying direction of the underground gas pipeline, and the inner wall of the end cap is provided with a terminal block connected to the gas tracer line.

4. The underground gas pipeline detection device according to claim 1, characterized in that, The inner wall of the end cap is provided with a sealing cap for sealing the leakage detection tube.

5. The underground gas pipeline detection device according to claim 3, characterized in that, The terminal block is mounted on the sealing cover.

6. The underground gas pipeline detection device according to claim 1, characterized in that, The leak detection tube is made of PVC and has an inner diameter of 1 cm.

7. The underground gas pipeline detection device according to claim 3, characterized in that, The terminals are made of metal.

8. The underground gas pipeline detection device according to claim 4, characterized in that, The inner diameter of the sealing cap is the same as the outer diameter of the leak detection tube.

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