Detection and positioning device for methane leakage of gas pipe network

Abstract

The utility model discloses a gas pipe network methane leakage detecting and positioning device which comprises a detecting machine body and a gas inlet pipe communicated with the top of the detecting machine body, the surface of the gas inlet pipe is communicated with a corrugated pipe, the corrugated pipe can be contracted, the two ends of the interior of the corrugated pipe are fixedly connected with oppositely-arranged membrane flaps, and the membrane flaps are connected with the detecting machine body. The membrane flaps can control the communication direction of the corrugated pipe in the contraction process of the corrugated pipe, a transmission structure is arranged on the back face of the detection machine body, the transmission structure can drive the corrugated pipe to vertically ascend and descend, the transmission structure comprises a sleeve plate arranged on the back face of the detection machine body, and a support is fixedly connected to the top of the sleeve plate. The structure of the corrugated pipe and the membrane flap is introduced, a well is simulated to extract airflow, the sensitivity and accuracy of methane leakage detection are improved, the contraction capacity of the corrugated pipe enables the membrane flap to control the communication direction of the airflow more effectively, and therefore accurate capture of methane leakage signals is achieved.

Description

Technical Field

[0001] This utility model relates to the field of methane leak detection technology, specifically a methane leak detection and location device for gas pipeline networks. Background Technology

[0002] Methane leak detection is a crucial step in ensuring industrial safety and environmental protection, particularly in coal mines, natural gas extraction and processing, and chemical production. The alarm concentration value of a methane leak detection alarm is determined based on the lower explosive limit (LEL) of methane in air. Various methane detectors are available on the market, such as portable methane detectors, fixed methane alarms, and laser methane telemetry devices. These instruments have different characteristics and applicable scenarios.

[0003] For example, patent application number 202321830503.2 published on the China Patent Network, entitled "A Methane Leakage Detection and Location Device for Gas Pipelines," includes a detector body. An air inlet is located on one side of the top of the detector body, and an air inlet pipe is fixedly connected to the air inlet. The air inlet pipe has a square design, and a cylindrical top cover is fixedly connected to the top of the air inlet pipe. A connecting cover is fixedly connected inside the top cover. This invention includes a detector body, an air inlet pipe, a top cover, a connecting cover, a universal joint, a suction cover, fan blades, a first bevel gear, and a micro motor. When in use, the micro motor can be activated to drive the fan blades to rotate inside the air inlet pipe. This allows the universal joint and suction cover to draw air from the detection location into the detector body. Even if there is a minor leak in the gas pipeline, this method can draw a small amount of leaked methane into the detector body, thereby detecting the methane leak and improving the detection effect.

[0004] However, existing methane leak detection and location devices mainly rely on fans to guide airflow. Methane leak detection and location devices equipped with fans consume a lot of electrical energy during operation, which reduces the continuous use time of the methane leak detection and location devices and cannot meet the needs of long-term operation.

[0005] Therefore, it is necessary to redesign and modify the methane leak detection and location device for the gas pipeline network. Utility Model Content

[0006] To address the problems mentioned in the background art, the purpose of this utility model is to provide a methane leak detection and location device for gas pipelines, which has the advantage of reducing energy consumption. It solves the problem that existing methane leak detection and location devices mainly rely on fans to guide airflow, and that methane leak detection and location devices with fans consume a lot of electrical energy during operation, resulting in a reduced service life and failing to meet the requirements for long-term operation.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a methane leak detection and location device for a gas pipeline network, comprising a detection body;

[0008] The air intake pipe is connected to the top of the testing machine.

[0009] The surface of the air intake pipe is connected to a bellows that can contract. Both ends of the bellows are fixedly connected to oppositely arranged diaphragms. The diaphragms can control the communication direction of the bellows during contraction. A transmission structure is provided on the back of the detection body, which can drive the bellows to move vertically up and down.

[0010] In a preferred embodiment of this invention, the transmission structure includes a sleeve plate disposed on the back of the detection body. A bracket is fixedly connected to the top of the sleeve plate. The end of the bracket away from the sleeve plate extends to the top of the detection body and is fixedly connected to the top of the bellows. A shaft is movably connected to the back of the detection body. A swing rod is fixedly connected to the surface of the shaft. The side of the swing rod away from the shaft extends to the back of the sleeve plate. A sliding rod located inside the sleeve plate is fixedly connected to the end of the swing rod away from the shaft. The sliding rod is slidably connected to the sleeve plate.

[0011] As a preferred embodiment of the present invention, an opening is provided on the right side of the detection body, the front end of the shaft penetrates the detection body and extends into the interior of the opening, and a pressing block located inside the opening is fixedly connected to the surface of the shaft.

[0012] As a preferred embodiment of this invention, guide rods are fixedly connected to both sides of the top of the detection body, and a limiting plate is fixedly connected to the top of the corrugated pipe. The limiting plate is sleeved on the surface of the guide rod and slidably connected to the guide rod.

[0013] As a preferred embodiment of this invention, the top of the detection body is provided with a compression spring sleeved on the surface of the guide rod, and the side of the compression spring away from the detection body contacts the bottom of the limiting plate.

[0014] As a preferred embodiment of the present invention, a shielding frame is fixedly connected to the back of the detection body, the sleeve plate and the swing rod are both located between the shielding frame and the detection body, a spring plate is fixedly connected to the inner surface of the shielding frame, the side of the spring plate away from the shielding frame contacts the surface of the swing rod, and the spring plate is elastic.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model improves the sensitivity and accuracy of methane leak detection by introducing a bellows and a diaphragm flap structure, which mimics the extraction of airflow by a water well. The contraction capability of the bellows allows the diaphragm flap to more effectively control the direction of airflow, thereby achieving accurate capture of methane leak signals.

[0017] 2. This utility model achieves effective driving of the vertical lifting and moving of the bellows through the combination of sleeve plate, bracket, shaft, swing rod and slide rod. It is not only compact and easy to operate, but also ensures the stability and accuracy of the bellows during the lifting process.

[0018] 3. By opening an opening on the right side of the detection body and setting a shaft and a pressing block, this utility model allows operators to easily activate the transmission structure by manually pressing, improving the ease of operation and user-friendliness of the device, and making the methane leak detection process more intuitive and easier to control.

[0019] 4. This utility model provides stable guidance and limiting function for the lifting and lowering movement of the bellows through the combination of guide rod and limiting plate, which not only ensures the stability and safety of the bellows during the lifting and lowering process, but also prevents the bellows from being damaged due to excessive movement.

[0020] 5. The present invention provides additional buffering and restoring force for the lifting and lowering movement of the bellows by setting the compression spring. When the bellows rises, the compression spring is compressed and stores energy; when the bellows falls, the compression spring releases energy and pushes the bellows to return to its original position.

[0021] 6. This utility model provides additional protection and cushioning for the swing arm through the combination of the shielding frame and the spring plate. The shielding frame can prevent external debris from entering the transmission structure and causing damage; the spring plate can absorb the impact and vibration of the swing arm during movement, further improving the stability and durability of the transmission structure. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0024] Figure 3 This is a rear view schematic diagram of a partial structure of this utility model;

[0025] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0026] In the diagram: 1. Detector body; 2. Inlet pipe; 3. Bellows; 4. Diaphragm flap; 5. Transmission structure; 6. Sleeve plate; 7. Bracket; 8. Shaft; 9. Swing rod; 10. Slide rod; 11. Opening; 12. Pressing block; 13. Guide rod; 14. Limiting plate; 15. Compression spring; 16. Shielding frame; 17. Spring plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1 to 4 As shown, the present invention provides a methane leak detection and location device for a gas pipeline network, comprising a detection body 1;

[0029] The air intake pipe 2 is connected to the top of the detection unit 1;

[0030] The surface of the intake pipe 2 is connected to a bellows 3, which can contract. Both ends of the bellows 3 are fixedly connected to oppositely arranged diaphragms 4. The diaphragms 4 can control the communication direction of the bellows 3 during the contraction process. The back of the detection body 1 is provided with a transmission structure 5, which can drive the bellows 3 to move vertically up and down.

[0031] refer to Figure 3 The transmission structure 5 includes a sleeve plate 6 disposed on the back of the detection body 1. A bracket 7 is fixedly connected to the top of the sleeve plate 6. The end of the bracket 7 away from the sleeve plate 6 extends to the top of the detection body 1 and is fixedly connected to the top of the bellows 3. A shaft 8 is movably connected to the back of the detection body 1. A swing rod 9 is fixedly connected to the surface of the shaft 8. The side of the swing rod 9 away from the shaft 8 extends to the back of the sleeve plate 6. A slide rod 10 located inside the sleeve plate 6 is fixedly connected to the end of the swing rod 9 away from the shaft 8. The slide rod 10 is slidably connected to the sleeve plate 6.

[0032] As a technical optimization of this utility model, the combination of sleeve plate 6, bracket 7, shaft 8, swing rod 9 and slide rod 10 realizes the effective driving of the vertical lifting and moving of the bellows 3. It is not only compact and easy to operate, but also ensures the stability and accuracy of the bellows 3 during the lifting process.

[0033] refer to Figure 3 An opening 11 is provided on the right side of the detection body 1. The front end of the shaft 8 passes through the detection body 1 and extends into the interior of the opening 11. A pressing block 12 located inside the opening 11 is fixedly connected to the surface of the shaft 8.

[0034] As a technical optimization of this utility model, by opening an opening 11 on the right side of the detection body 1 and setting a shaft 8 and a pressing block 12, the operator can easily start the transmission structure 5 by manually pressing, which improves the ease of operation and user-friendliness of the device, and makes the methane leak detection process more intuitive and easier to control.

[0035] refer to Figure 3 Guide rods 13 are fixedly connected to both sides of the top of the detection body 1. A limiting plate 14 is fixedly connected to the top of the bellows 3. The limiting plate 14 is sleeved on the surface of the guide rod 13 and slidably connected to the guide rod 13.

[0036] As a technical optimization of this utility model, the combination of guide rod 13 and limiting plate 14 provides stable guidance and limiting function for the lifting and lowering movement of bellows 3, which not only ensures the stability and safety of bellows 3 during the lifting and lowering process, but also prevents bellows 3 from being damaged due to excessive movement.

[0037] refer to Figure 4 The top of the detection body 1 is provided with a compression spring 15 sleeved on the surface of the guide rod 13, and the side of the compression spring 15 away from the detection body 1 contacts the bottom of the limiting plate 14.

[0038] As a technical optimization of this utility model, the setting of the compression spring 15 provides additional buffering and restoring force for the lifting and lowering movement of the bellows 3. When the bellows 3 rises, the compression spring 15 is compressed and stores energy; when the bellows 3 falls, the compression spring 15 releases energy and pushes the bellows 3 to return to its original position.

[0039] refer to Figure 2 A shielding frame 16 is fixedly connected to the back of the detection body 1. The sleeve plate 6 and the swing rod 9 are both located between the shielding frame 16 and the detection body 1. A spring plate 17 is fixedly connected to the inner surface of the shielding frame 16. The side of the spring plate 17 away from the shielding frame 16 contacts the surface of the swing rod 9. The spring plate 17 is elastic.

[0040] As a technical optimization of this utility model, the combination of the shielding frame 16 and the spring plate 17 provides additional protection and buffering for the swing arm 9. The shielding frame 16 can prevent external debris from entering the transmission structure 5 and causing damage; the spring plate 17 can absorb the impact and vibration of the swing arm 9 during the movement, further improving the stability and durability of the transmission structure 5.

[0041] The working principle and usage process of this utility model are as follows: When it is necessary to detect methane leakage, the operator operates by pressing the pressing block 12 located inside the opening 11. The pressing block 12 is fixedly connected to the shaft 8. Therefore, the movement of the pressing block 12 will drive the shaft 8 and the swing arm 9 to rotate. The rotation of the shaft 8 causes the swing arm 9 to rotate around the center of the shaft 8. The end of the swing arm 9 away from the shaft 8 is connected to a slide rod 10. The slide rod 10 slides inside the sleeve plate 6. The rotation of the swing arm 9 and the sliding of the slide rod 10 together push the bellows 3 upward along the guide rod 13. Since the two ends of the bellows 3 are fixedly connected to the limit plate 14, and the limit plate 14 is slidably connected to the guide rod 13, the rise of the bellows 3 is smooth and controllable. As the bellows 3 rises, the diaphragm 4 deforms inside the bellows 3. Since the diaphragm 4 is set relative to each other, during the contraction of the bellows 3, the diaphragm 4 will close part of the connecting space of the bellows 3, allowing airflow to pass through only from a specific direction. This design imitates the process of water wells extracting airflow, enabling the device to more effectively collect and analyze methane leakage signals from the gas pipeline network. When the pressing is completed, the operator can release the pressing block 12 to reset the transmission structure 5. At this time, the elastic force of the compression spring 15 will push the limit plate 14 and the bellows 3 downward along the guide rod 13 until they return to the initial position.

[0042] In summary, this gas pipeline methane leak detection and location device, by introducing the structure of the corrugated pipe 3 and the diaphragm flap 4, mimics the extraction of gas flow by a water well, thereby improving the sensitivity and accuracy of methane leak detection. The contraction capability of the corrugated pipe 3 allows the diaphragm flap 4 to more effectively control the direction of gas flow, thus achieving precise capture of methane leak signals.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A methane leak detection and location device for a gas pipeline network, comprising a detection body (1); The air intake pipe (2) is connected to the top of the detection body (1); Its features are: The surface of the air intake pipe (2) is connected to a bellows pipe (3), which can contract. Both ends of the bellows pipe (3) are fixedly connected to oppositely arranged diaphragms (4). The diaphragms (4) can control the communication direction of the bellows pipe (3) during the contraction process. A transmission structure (5) is provided on the back of the detection body (1), which can drive the bellows pipe (3) to move vertically up and down.

2. The gas pipeline methane leak detection and location device according to claim 1, characterized in that: The transmission structure (5) includes a sleeve plate (6) disposed on the back of the detection body (1). A bracket (7) is fixedly connected to the top of the sleeve plate (6). The end of the bracket (7) away from the sleeve plate (6) extends to the top of the detection body (1) and is fixedly connected to the top of the bellows (3). A shaft (8) is movably connected to the back of the detection body (1). A swing rod (9) is fixedly connected to the surface of the shaft (8). The side of the swing rod (9) away from the shaft (8) extends to the back of the sleeve plate (6). A slide rod (10) located inside the sleeve plate (6) is fixedly connected to the end of the swing rod (9) away from the shaft (8). The slide rod (10) is slidably connected to the sleeve plate (6).

3. The gas pipeline methane leak detection and location device according to claim 2, characterized in that: An opening (11) is provided on the right side of the detection body (1). The front end of the shaft (8) passes through the detection body (1) and extends into the interior of the opening (11). A pressing block (12) located inside the opening (11) is fixedly connected to the surface of the shaft (8).

4. The gas pipeline methane leak detection and location device according to claim 1, characterized in that: Guide rods (13) are fixedly connected to both sides of the top of the detection body (1), and a limiting plate (14) is fixedly connected to the top of the corrugated pipe (3). The limiting plate (14) is sleeved on the surface of the guide rod (13) and slidably connected to the guide rod (13).

5. A methane leak detection and location device for a gas pipeline network according to claim 4, characterized in that: The top of the detection body (1) is provided with a compression spring (15) sleeved on the surface of the guide rod (13), and the side of the compression spring (15) away from the detection body (1) contacts the bottom of the limiting plate (14).

6. The gas pipeline methane leak detection and location device according to claim 2, characterized in that: A shielding frame (16) is fixedly connected to the back of the detection body (1). The sleeve plate (6) and the swing rod (9) are both located between the shielding frame (16) and the detection body (1). A spring plate (17) is fixedly connected to the inner surface of the shielding frame (16). The side of the spring plate (17) away from the shielding frame (16) contacts the surface of the swing rod (9). The spring plate (17) is elastic.

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