A leak detection apparatus for a gas gathering pipeline

Abstract

The utility model provides a kind of for gas gathering pipeline's leak detection device, belong to intelligent gas gathering technical field, to solve the problem of difficult positioning connection flange leak point of the existing for gas gathering pipeline's leak detection device. Including gas gathering pipeline, connection flange, detection ring cover, warning mechanism, sealing assembly and detection component, the connection flange fixed mounting is in gas gathering pipeline middle part;The detection ring cover is provided with two groups, two groups the detection ring cover is symmetrically structured design, two groups the detection ring cover is closed after being connected by bolt and is clamped in connection flange outside;The warning mechanism is provided with multiple groups, multiple groups the warning mechanism fixed mounting is in multiple detection round tube top;The sealing assembly is arranged in detection ring cover inside;The detection component is arranged in detection ring cover inside.The utility model has the advantages such as reducing stop time, quickly positioning leak point, shortening maintenance time etc.

Description

Technical Field

[0001] This utility model belongs to the field of intelligent gas extraction technology, and more specifically, it relates to a leak detection device for gas extraction pipelines. Background Technology

[0002] In intelligent gas extraction operations, gas pipelines are crucial facilities for transporting natural gas. To ensure the safe transport of gas during intelligent gas extraction, leak detection devices for these pipelines are essential. Existing leak detection devices for gas pipelines mostly detect leaks at the connection flange location. Therefore, most devices are installed in this area, primarily using pressure sensors and gas concentration detection elements at the flange to capture real-time pressure fluctuations and changes in gas concentration, thus enabling targeted detection of pipeline leak risks.

[0003] Existing application number CN202322791496.6 discloses a gas leak detection device for gas pipelines, comprising an upper collar, a hinge rotatably connected to the right side of the upper collar, a lower collar rotatably connected to the lower side of the hinge, a pressure probe fixedly connected to the upper inner side of the upper collar, a controller fixedly connected to the top of the pressure probe, a pressure gauge fixedly connected to the rear top of the controller, an alarm fixedly connected to the front top of the controller, a connecting plate fixedly connected to the left side of the upper collar, a locking block fixedly connected to the bottom of the connecting plate, and a connecting seat fixedly connected to the left side of the lower collar. This invention provides better gas leak detection and alarm through the detection device and sealing ring, and the connecting plate and connecting seat facilitate installation and disassembly, reducing the number of devices required and avoiding waste.

[0004] Based on the above, most existing leak detection devices for gas extraction pipelines only detect a single connecting flange using multiple sensors. However, it is inconvenient to locate the specific location of the leak on the connecting flange, requiring personnel to conduct a detailed inspection and positioning, which is overly cumbersome. Moreover, leaks often directly cut off the gas supply to the entire pipeline. Although this can control the risk, it requires a long wait for maintenance personnel to arrive on site and locate the leak before repairs can be carried out. This not only causes a prolonged interruption of the overall supply but also affects the efficiency of gas delivery. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a leak detection device for gas extraction pipelines. This addresses the issue that existing leak detection devices for gas extraction pipelines mostly rely on multiple sensors to detect leaks at a single connecting flange. However, locating the exact location of a leak at the connecting flange is inconvenient, requiring personnel to conduct on-site inspections, which is overly cumbersome. Furthermore, leaks often directly cut off the gas supply to the entire pipeline, which, while controlling the risk, requires a long wait for maintenance personnel to arrive and locate the leak before repairs can begin. This not only leads to prolonged interruptions in overall gas supply but also affects gas delivery efficiency.

[0006] The purpose and effectiveness of this utility model's leak detection device for gas extraction pipelines are achieved through the following specific technical means: A leak detection device for a gas sampling pipeline includes a gas sampling pipeline, a connecting flange, a detection ring, a detection circular tube, a warning mechanism, a sealing assembly, and a detection assembly. The connecting flange is fixedly installed in the middle of the gas sampling pipeline. Two sets of detection rings are provided, arranged symmetrically, and are bolted together and locked onto the outside of the connecting flange. Multiple sets of detection circular tubes are arranged in a circumferential array inside the detection ring. Multiple sets of warning mechanisms are provided, fixedly installed on the top of the multiple sets of detection circular tubes. The sealing assembly is located inside the detection ring. The detection assembly is located inside the detection ring.

[0007] Furthermore, the sealing assembly includes a fixing plate and a sealing ring, wherein the fixing plate is formed inside the detection ring sleeve; and the sealing ring is fixedly installed on the inner side of the fixing plate.

[0008] Furthermore, the sealing assembly also includes a detection air groove, which is formed inside the detection ring.

[0009] Furthermore, the detection component includes: a partition plate and a connecting pipe. Multiple sets of partition plates are arranged in a circumferential array inside the detection air groove, and the multiple sets of partition plates divide the detection air groove into multiple independent sub-grooves. Multiple sets of connecting pipes are arranged, and the multiple sets of connecting pipes are fixedly installed at the ends of multiple sets of detection circular pipes, with the top ends of the multiple sets of connecting pipes extending into the detection air groove.

[0010] Furthermore, the detection assembly also includes: a transmission piston, a transmission rod, and a return spring. Multiple sets of transmission pistons are provided, and these sets are slidably connected inside multiple sets of detection tubes. Multiple sets of transmission rods are provided, and these sets are fixedly installed on the upper part of the multiple sets of transmission pistons, and are slidably connected inside the multiple sets of detection tubes. Multiple sets of return springs are provided, with one end of each set fixedly connected inside the multiple sets of detection tubes, and the other end fixedly connected to the upper part of the multiple sets of transmission pistons.

[0011] Furthermore, the detection component also includes: displacement sensors and audible and visual alarms. Multiple sets of displacement sensors are provided, and multiple sets of displacement sensors are fixedly installed at the bottom of multiple sets of warning mechanisms and at one end of multiple sets of transmission rods. Multiple sets of audible and visual alarms are provided, and multiple sets of audible and visual alarms are fixedly installed at the top of multiple sets of warning mechanisms.

[0012] Compared with the prior art, the present invention has the following beneficial effects: Firstly, this invention features a sealing assembly. Through a symmetrically designed detection ring engaging with the connecting flange, combined with the limiting effect of the fixed clamp and the sealing seal of the sealing ring, the connection seam of the connecting flange is sealed within the detection gas chamber. Leaking gas is confined within the detection gas chamber, eliminating the need to immediately shut down the entire pipeline's gas supply. Instead, targeted handling can be carried out once personnel arrive, reducing pipeline downtime and ensuring gas delivery efficiency.

[0013] Secondly, this invention features a detection assembly that divides the detection gas tank into independent sub-slots using multiple sets of partitions, with each sub-slot corresponding to a set of detection units. When leaking gas enters the corresponding sub-slot, it pushes the transmission piston and transmission rod inside the detection tube, triggering a displacement sensor, which in turn activates an audible and visual alarm and simultaneously sends a signal to the remote control mechanism. This eliminates the need for personnel to check each leak individually, allowing for quick and accurate location of the leak, simplifying the operation process and shortening maintenance preparation time.

[0014] This invention has the advantages of reducing downtime, quickly locating leak points, and shortening maintenance time. It solves the problem of cumbersome leak point location in traditional devices and avoids efficiency loss caused by prolonged pipeline interruption, thus effectively improving maintenance efficiency. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the connecting flange structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the detection ring structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the detection air tank structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the detection circular tube structure of this utility model.

[0020] Figure 6 This is a schematic diagram of the internal structure of the detection tube of this utility model.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Gas sampling pipeline; 2. Connecting flange; 3. Detection ring; 301. Fixing plate; 302. Sealing ring; 303. Detection gas groove; 304. Divider plate; 4. Detection round pipe; 401. Connecting pipeline; 402. Transmission piston; 403. Transmission rod; 404. Return spring; 5. Warning mechanism; 501. Displacement sensor; 502. Audible and visual alarm. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] Example 1: As attached Figure 1 To be continued Figure 6 As shown: This utility model provides a leak detection device for a gas sampling pipeline, including a gas sampling pipeline 1, a connecting flange 2, a detection ring 3, a detection circular tube 4, a warning mechanism 5, and a sealing assembly. The connecting flange 2 is fixedly installed in the middle of the gas sampling pipeline 1. Two sets of detection rings 3 are provided, and the two sets of detection rings 3 are symmetrically designed. The two sets of detection rings 3 are connected by bolts and locked onto the outside of the connecting flange 2. Multiple sets of detection circular tubes 4 are provided, and the multiple sets of detection circular tubes 4 are arranged in a circumferential array inside the detection rings 3. Multiple sets of warning mechanisms 5 are provided, and the multiple sets of warning mechanisms 5 are fixedly installed on the top of the multiple sets of detection circular tubes 4. The sealing assembly is located inside the detection rings 3.

[0024] The sealing assembly includes a fixing plate 301 and a sealing ring 302. The fixing plate 301 is located inside the detection ring sleeve 3. The sealing ring 302 is fixedly installed inside the fixing plate 301.

[0025] The sealing assembly also includes a detection air groove 303, which is located inside the detection ring 3.

[0026] The specific usage and function of this embodiment are as follows: During assembly, two sets of symmetrically designed detection rings 3 are first fastened to the outside of the connecting flange 2, and then tightened with bolts to achieve closure and fixation, ensuring that the detection rings 3 are stably engaged with the outside of the flange. During assembly, the fixing plate 301 inside the detection ring 3 provides radial restraint to the connecting flange 2, ensuring precise assembly. Simultaneously, the sealing ring 302 inside the fixing plate 301 tightly adheres to the outer wall of the connecting flange 2 and the inner wall of the detection ring 3, effectively blocking external environmental interference and keeping the connection seam of the connecting flange 2 within the enclosed space of the detection gas groove 303. When gas leakage occurs at the connection seam of the connecting flange 2, the leaked gas will be confined inside the detection gas groove 303 and will not directly diffuse to the outside. At this time, it is not necessary to immediately cut off the gas supply to the entire gas sampling pipeline 1; normal supply can be maintained until personnel arrive on site, at which point the related pipelines in the leak area can be selectively disconnected for repair.

[0027] Example 2: Based on Example 1, such as Figures 1 to 6 As shown, it also includes: a detection component, which is disposed inside the detection ring 3.

[0028] The detection components include: partition plates 304 and connecting pipes 401. Multiple sets of partition plates 304 are arranged in a circumferential array inside the detection air tank 303, and the multiple sets of partition plates 304 divide the detection air tank 303 into multiple independent sub-tanks. Multiple sets of connecting pipes 401 are arranged and fixedly installed at the ends of multiple sets of detection circular pipes 4, and the top ends of the multiple sets of connecting pipes 401 extend into the detection air tank 303.

[0029] The detection assembly also includes: a transmission piston 402, a transmission rod 403, and a return spring 404. Multiple sets of transmission pistons 402 are provided, and the multiple sets of transmission pistons 402 are slidably connected inside the multiple sets of detection circular tubes 4. Multiple sets of transmission rods 403 are provided, and the multiple sets of transmission rods 403 are fixedly installed on the upper part of the multiple sets of transmission pistons 402, and the multiple sets of transmission rods 403 are slidably connected inside the multiple sets of detection circular tubes 4. Multiple sets of return springs 404 are provided, with one end of the multiple sets of return springs 404 fixedly connected inside the multiple sets of detection circular tubes 4, and the other end of the multiple sets of return springs 404 fixedly connected to the upper part of the multiple sets of transmission pistons 402.

[0030] The detection components also include: displacement sensors 501 and audible and visual alarms 502. Multiple sets of displacement sensors 501 are provided and fixedly installed at the bottom of multiple sets of warning mechanisms 5. Multiple sets of displacement sensors 501 are fixedly installed at one end of multiple sets of transmission rods 403. Multiple sets of audible and visual alarms 502 are provided and fixedly installed at the top of multiple sets of warning mechanisms 5.

[0031] The specific usage and function of this embodiment are as follows: Multiple sets of partition plates 304 divide the detection gas tank 303 into multiple independent sub-tanks, and each sub-tank is sealed and connected to the detection circular tube 4 above through a corresponding connecting pipe 401. When a leak occurs at the connection seam of the connecting flange 2 at the opposite position, the gas leaks into the corresponding sub-tank, increasing the internal pressure of the sub-tank. This pressure increases through the connecting pipe 401, pushing the transmission piston 402 to slide inside the detection circular tube 4 and compressing the return spring 404. The movement of the transmission piston 402 drives the transmission rod 403 to move, which triggers the displacement sensor 501. The displacement sensor 501 immediately sends a signal to the warning mechanism 5. After receiving the signal, the warning mechanism 5 activates the top audible and visual alarm 502 to visually indicate the leak area to the personnel on site through audible and visual signals. At the same time, it synchronously transmits the electrical signal to the remote control mechanism.

[0032] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0033] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0034] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. A leak detection device for gas extraction pipelines, characterized in that: The leakage detection device for a gas sampling pipeline includes a gas sampling pipeline (1), a connecting flange (2), a detection ring (3), a detection circular tube (4), a warning mechanism (5), a sealing assembly, and a detection assembly. The connecting flange (2) is fixedly installed in the middle of the gas sampling pipeline (1). Two sets of detection rings (3) are provided, and the two sets of detection rings (3) are designed in a symmetrical structure. The two sets of detection rings (3) are connected by bolts and then locked onto the outside of the connecting flange (2). Multiple sets of detection circular tubes (4) are provided, and the multiple sets of detection circular tubes (4) are arranged in a circumferential array inside the detection rings (3). Multiple sets of warning mechanisms (5) are provided, and the multiple sets of warning mechanisms (5) are fixedly installed on the top of the multiple sets of detection circular tubes (4). The sealing assembly is located inside the detection rings (3). The detection assembly is located inside the detection rings (3).

2. The leak detection device for gas extraction pipelines as described in claim 1, characterized in that: The sealing assembly includes a fixed mounting plate (301) and a sealing ring (302). The fixed mounting plate (301) is located inside the detection ring (3). The sealing ring (302) is fixedly installed inside the fixed mounting plate (301).

3. The leak detection device for gas extraction pipelines as described in claim 2, characterized in that: The sealing assembly also includes a detection air groove (303), which is located inside the detection ring (3).

4. The leak detection device for gas extraction pipelines as described in claim 1, characterized in that: The detection component includes: a partition plate (304) and a connecting pipe (401). Multiple sets of partition plates (304) are arranged in a circumferential array inside the detection air groove (303). The multiple sets of partition plates (304) divide the detection air groove (303) into multiple independent sub-grooves. Multiple sets of connecting pipes (401) are arranged. The multiple sets of connecting pipes (401) are fixedly installed at the ends of multiple sets of detection circular pipes (4). The top ends of the multiple sets of connecting pipes (401) extend into the detection air groove (303).

5. The leak detection device for gas extraction pipelines as described in claim 4, characterized in that: The detection assembly further includes: a transmission piston (402), a transmission rod (403), and a return spring (404). Multiple sets of transmission pistons (402) are provided, and multiple sets of transmission pistons (402) are slidably connected inside multiple sets of detection tubes (4). Multiple sets of transmission rods (403) are provided, and multiple sets of transmission rods (403) are fixedly installed on the upper part of multiple sets of transmission pistons (402), and multiple sets of transmission rods (403) are slidably connected inside multiple sets of detection tubes (4). Multiple sets of return springs (404) are provided, and one end of multiple sets of return springs (404) is fixedly connected inside multiple sets of detection tubes (4), and the other end of multiple sets of return springs (404) is fixedly connected to the upper part of multiple sets of transmission pistons (402).

6. The leak detection device for gas extraction pipelines as described in claim 4, characterized in that: The detection component also includes: a displacement sensor (501) and an audible and visual alarm (502). Multiple sets of the displacement sensor (501) are provided, and multiple sets of the displacement sensor (501) are fixedly installed at the bottom of multiple sets of warning mechanisms (5). Multiple sets of the displacement sensor (501) are fixedly installed at one end of multiple sets of transmission rods (403). Multiple sets of the audible and visual alarm (502) are provided, and multiple sets of the audible and visual alarm (502) are fixedly installed at the top of multiple sets of warning mechanisms (5).

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