A valve well leakage monitoring device based on vibration sensor

Abstract

The utility model discloses a valve well leakage monitoring device based on vibration sensor relates to gas pipeline monitoring field. It includes gas main pipeline, a plurality of valve well and pipeline valve in well, diffusion mouth, three -way joint, still includes the vibration sensor that is composed of sensor main part and wire. Three -way joint top port is connected branch pipe, and the bushing casing pipe is installed in branch pipe, and sensor main part seals and is connected casing pipe bottom and extends into gas main pipeline, and wire passes casing pipe and extends to valve well. The quick -mounting structure is established in casing pipe top, and is sealed with branch pipe connection to realize quick dismounting. Quick -mounting structure is fixed through the clamping arm hinged in branch pipe top and hooks the end plate, and rotates locking plate and cooperates telescopic positioning column and limits locking clamping arm. The device lets sensor detect gas vibration in pipe directly, weakens ground vibration interference, and guarantees monitoring accuracy, and quick -mounting structure is convenient for sensor maintenance, and locking design prevents clamping arm loosening, avoids gas leakage, and connection is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of gas valve well monitoring technology, specifically to a valve well leakage monitoring device based on a vibration sensor. Background Technology

[0002] In urban gas transmission systems, buried pipelines serve as the core component, and their safe operation is directly related to public safety and the protection of people's livelihoods. However, leak monitoring of buried gas pipelines has long faced two major challenges: First, pipelines are typically buried 1-3 meters underground, and after a leak, the gas easily seeps into soil pores and diffuses along the strata, making it difficult to detect visually from the surface; second, even if a leak is confirmed through gas detection methods, the precise location of the leak point is extremely difficult due to factors such as uneven soil conditions and complex gas diffusion paths.

[0003] To address these issues, various buried gas pipeline leak monitoring devices have emerged on the market, including vibration sensor detection equipment. For example, Chinese utility model patent CN220061476U discloses a "gas pipeline monitoring and early warning valve," which has a vibration sensor installed on the end face of the disc facing the gas pipe, allowing the vibration sensor to directly contact the outer wall of the gas pipe. The design concept of this solution is that when a gas pipeline or valve leaks, the leaking gas flow impacts the inner wall of the pipeline, generating abnormal vibrations at a specific frequency. By capturing these vibration signals through the vibration sensor, it is possible to determine whether a leak has occurred and its location.

[0004] However, gas pipeline monitoring equipment has the following drawbacks: Due to the complex underground environment of buried pipelines, ground vibrations generated by municipal construction above the pipeline (such as road excavation and pile foundation work) and passing vehicles are transmitted to the pipeline body through the soil medium, causing vibration sensors to mistakenly capture vibration signals not caused by leaks. In addition, environmental factors such as soil settlement and changes in groundwater levels may also cause minor vibrations in the pipeline, further interfering with the detection accuracy of the sensors. These external interference signals are difficult to distinguish effectively from vibration signals caused by leaks, ultimately leading to frequent misjudgments by the monitoring device. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical defects and provide a valve well leakage monitoring device based on a vibration sensor.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a valve well leakage monitoring device based on a vibration sensor, comprising a main gas pipeline and multiple valve wells arranged along the main gas pipeline. Each valve well is equipped with a pipeline valve, a vent, and a tee connector. The pipeline valve and tee connector are connected to the main gas pipeline. The device also includes a vibration sensor, comprising a sensor body and a wire. A branch pipe is connected to the top port of the tee connector. An installation sleeve is fitted inside the branch pipe. The sensor body is sealed to the bottom of the installation sleeve, allowing the sensor body to extend into the main gas pipeline. The wire passes through the installation sleeve and extends into the valve well. A quick-connect structure is provided at the top of the installation sleeve, connecting the installation sleeve to the top of the branch pipe and achieving a seal.

[0007] Furthermore, the quick-installation structure includes an end plate, a locking plate rotatably disposed on the top of the end plate, and a snap-fit ​​arm hinged to the side wall of the branch pipe. The installation sleeve is fixedly disposed at the bottom of the end plate. The end plate has a snap-fit ​​groove corresponding to the snap-fit ​​arm, and the locking plate has a notch corresponding to the snap-fit ​​arm. The snap-fit ​​arm snaps into the snap-fit ​​groove through the notch. A sealing ring is provided at the bottom edge of the end plate, and the sealing ring is in close contact with the top of the branch pipe.

[0008] Furthermore, the top of the end plate is provided with a telescopic positioning post, which is not on the same radius. The locking plate is provided with a corresponding through hole, which is on the same radius as the notch. The top of the telescopic positioning post extends into the through hole.

[0009] Furthermore, the top of the branch pipe is provided with a recessed groove, and an ejector spring is provided inside, with the top of the ejector spring abutting against the end plate.

[0010] Furthermore, the top of the side wall of the sensor body is provided with an external thread, and the bottom of the inner wall of the mounting sleeve is provided with an internal thread. The two are threadedly connected, and a boss is provided inside the mounting sleeve. A sealing ring is provided on the boss, and the top of the sensor body is in close contact with the sealing ring.

[0011] Furthermore, the end plate and locking plate are provided with a wire outlet hole in the middle, the wire extends out from the wire outlet hole, a support plug is slidably sleeved on the wire, and the support plug is inserted into the wire outlet hole.

[0012] Furthermore, the other end of the wire is connected to a communication control box, which is fixed to the side wall of the valve well.

[0013] Furthermore, there is a gap between the branch pipe and the mounting sleeve, and the vent is fixedly installed on the side wall of the branch pipe.

[0014] Furthermore, each of the valve wells is equipped with two pipe valves, which are respectively located on both sides of the tee joint.

[0015] The beneficial effects of this utility model are as follows: This utility model inserts the vibration sensor directly into the main gas pipeline, and determines whether there is a leak and the leak point by detecting the internal gas vibration, thereby minimizing the impact of ground vibration on the sensor and ensuring the accuracy of monitoring.

[0016] This invention utilizes a mounting sleeve to install the vibration sensor and protect its wiring. The mounting sleeve employs a quick-connect structure for a sealed connection with the branch pipe, enabling rapid installation and disassembly, greatly facilitating the maintenance of the vibration sensor.

[0017] The quick-installation structure of this invention uses a snap-fit ​​arm hinged to the top of the branch pipe to hook the end plate, thus achieving a secure connection. By rotating the locking plate and cooperating with the telescopic positioning post, the snap-fit ​​arm is locked in place, effectively preventing gas leakage caused by loosening of the snap-fit ​​arm and ensuring a stable and reliable connection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a valve well leakage monitoring device based on a vibration sensor according to this utility model; Figure 2 This is a schematic diagram of the three-way connector box branch pipe of a valve well leakage monitoring device based on a vibration sensor under perspective view. Figure 3 This is an exploded view of the quick-assembly structure; Figure 4 This is a structural schematic diagram of the installation sleeve viewed from below; Figure 5 This is an installation distribution diagram of a valve well leakage monitoring device based on a vibration sensor according to this utility model.

[0019] 1. Gas main pipeline; 2. Valve well; 3. Pipeline valve; 4. Vent; 5. Tee joint; 6. Vibration sensor; 7. Sensor body; 8. Wire; 9. Branch pipe; 10. Installation sleeve; 11. End plate; 12. Locking plate; 13. Snap-fit ​​arm; 14. Snap-fit ​​groove; 15. Notch; 16. Telescopic positioning post; 17. Through hole; 18. Slot; 19. Ejection spring; 20. Sealing ring one; 21. Boss; 22. Sealing ring two; 23. Outlet hole; 24. Support plug. Detailed Implementation

[0020] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0021] Embodiments of this utility model: such as Figure 1-5 As shown, a valve well leakage monitoring device based on a vibration sensor includes a main gas pipeline 1 and multiple valve wells 2 arranged along the main gas pipeline 1. Each valve well 2 is equipped with a pipeline valve 3, a vent 4, and a tee connector 5. The pipeline valve 3 and tee connector 5 are connected to a gas transmission pipeline, forming the main gas pipeline 1. In the prior art, the vent 4 on the gas transmission pipeline is generally directly located at the port of the tee connector 5.

[0022] like Figure 1-3 As shown, this embodiment also includes a vibration sensor 6, which includes a sensor body 7 and a wire 8. The top port of the tee connector 5 is connected to a branch pipe 9. An installation sleeve 10 is sleeved inside the branch pipe 9. The sensor body 7 is sealed to the bottom of the installation sleeve 10, so that the sensor body 7 extends into the gas main pipeline 1. The wire 8 passes through the installation sleeve 10 and extends into the valve well 2. The top of the installation sleeve 10 is provided with a quick-connect structure, and the installation sleeve 10 is connected to the top of the branch pipe 9 through the quick-connect structure, and a seal is achieved.

[0023] like Figure 2 As shown, there is a gap between the branch pipe 9 and the mounting sleeve 10, and the vent 4 is fixedly installed on the side wall of the branch pipe 9.

[0024] Through the above structural design, the vibration sensor 6 and the vent 4 are centrally arranged on the branch pipe 9, which not only does not interfere with the venting function, but also allows the vibration sensor 6 to penetrate deep into the transported gas, facilitating its accurate detection of gas vibration. Compared with traditional monitoring devices that install vibration sensors on the pipe wall, the monitoring device in this embodiment has higher monitoring accuracy, can effectively shield the vibration sensor from external vibration interference, and minimizes the risk of misjudgment.

[0025] like Figure 1 , 2 As shown, each valve well 2 is equipped with two pipe valves 3, which are respectively located on both sides of the tee joint 5.

[0026] With the above structure, the two pipe valves 3 are closed when installing or removing the vibration sensor 6, which facilitates the installation, inspection and maintenance of the vibration sensor 6.

[0027] like Figure 3 As shown, the quick-installation structure includes an end plate 11, a locking plate 12 rotatably disposed on the top of the end plate 11, and a snap-fit ​​arm 13 hinged to the side wall of the branch pipe 9. The end plate 11 is provided with a snap-fit ​​groove 14 corresponding to the snap-fit ​​arm 13, and the locking plate 12 is provided with a notch 15 corresponding to the snap-fit ​​arm 13. The snap-fit ​​arm 13 is snapped into the snap-fit ​​groove 14 through the notch 15. The bottom edge of the end plate 11 is provided with a sealing ring 20, which is in close contact with the top of the branch pipe 9.

[0028] like Figure 3 As shown, the top of the end plate 11 is provided with a telescopic positioning post 16. The telescopic positioning posts 16 are not on the same radius. The locking plate 12 is provided with a corresponding through hole 17. The through hole 17 and the notch 15 are on the same radius. The top of the telescopic positioning post 16 extends into the through hole 17.

[0029] It is worth noting that the telescopic positioning column 16 includes a reset spring and a telescopic column. The top of the end plate 11 is provided with a telescopic groove, and the two ends of the spring are respectively connected to the bottom of the telescopic column and the telescopic groove.

[0030] like Figure 2 , 3 As shown, the top of the branch pipe 9 is provided with a recessed groove 18, and an ejector spring 19 is provided inside. The top of the ejector spring 19 abuts against the end plate 11.

[0031] With the above structure, before installation, align the notch 15 with the snap-fit ​​groove 14 (the maintenance personnel can be equipped with a thin rod corresponding to the through hole 17; inserting the thin rod into the through hole 17 will press down the telescopic positioning column 16 to retract it into the telescopic groove). Insert the vibration sensor 6 and the installation sleeve 10 into the branch pipe 9, and press the end plate 11 so that its bottom sealing ring 20 is in close contact with the top of the branch pipe 9. Then, rotate the snap-fit ​​arm 13 so that it can smoothly snap into the snap-fit ​​groove 14 through the notch 15. Rotate the locking plate 12 to misalign the notch 15 with the snap-fit ​​groove 14, thereby locking the snap-fit ​​arm 13. During the rotation of the locking plate 12, when the telescopic positioning column 16 is aligned with the through hole 17, its top end will automatically spring into the through hole 17, effectively preventing the locking plate 12 from rotating under the action of pipe vibration, and finally achieving a stable and reliable connection.

[0032] like Figure 4 As shown, the top of the side wall of the sensor body 7 is provided with an external thread, and the bottom of the inner wall of the mounting sleeve 10 is provided with an internal thread. The two are connected by threads, and the mounting sleeve 10 is provided with a boss 21. A sealing ring 22 is provided on the boss 21, and the top of the sensor body 7 is in close contact with the sealing ring 22.

[0033] The sealing connection between the sensor body 7 and the bottom of the mounting sleeve 10 is achieved by setting the boss 21 and the sealing ring 22 on it, thus preventing gas leakage from this point.

[0034] like Figure 3 As shown, the end plate 11 and the locking plate 12 are provided with a wire outlet hole 23 in the middle. The wire 8 extends out from the wire outlet hole 23. A support plug 24 is slidably sleeved on the wire 8 and inserted into the wire outlet hole 23.

[0035] It is worth noting that the support plug 24 is made of rubber, which makes it easy to remove and install, and also has a cushioning effect to prevent vibration from damaging the wire 8.

[0036] The other end of the wire 8 is connected to a communication control box, which is fixed on the side wall of the valve well 2.

[0037] The communication control box is an existing technology, mainly used to store and transmit vibration information monitored by vibration sensors and send it to the monitoring center for analysis and judgment.

[0038] Repair of the vibration sensor of this utility model: ① Pretreatment: Close the pipe valves 3 on both sides of the tee joint 5 and open the vent 4 to release the residual gas in the pipe.

[0039] ② Remove the vibration sensor: Insert a special thin rod (or use readily available materials) into the through hole 17 of the locking plate 12, press down the telescopic positioning post 16 until it retracts into the telescopic groove, rotate the locking plate 12 to align the notch 15 with the snap-fit ​​groove 14 of the end plate 11, rotate the snap-fit ​​arm 13 to move it away from the snap-fit ​​groove 14, and push the mounting sleeve 10 upward under the action of the push-out spring 19 to prevent the sealing ring 20 from aging and sticking, which would make it inconvenient to remove the mounting pipe 10; after removing the mounting sleeve 10, inspect the vibration sensor 6. If the vibration sensor 6 needs to be replaced, remove the support plug 24 from the outlet hole 23, separate the wire 8 from the communication control box, remove the support plug 24; and rotate the sensor body 7 to remove it.

[0040] ③ Installation of the vibration sensor: Pass the wire 8 of the new vibration sensor 6 through the mounting sleeve 10, and install the sensor body 7 at the bottom of the mounting sleeve 10 to achieve a sealed connection; after the wire 8 extends out of the outlet hole 23, pass the support plug 24 through the wire 8 and insert it into the outlet hole 23, and install the wire 8 to the communication control box. Then, extend the mounting sleeve 10 and the vibration sensor 6 into the branch pipe 9, press down on the end plate 11 to compress the ejector spring 19, and make the sealing ring 20 contact the end plate 11. Rotate the snap-fit ​​arm 13 so that it passes through the notch 15 and snaps into the snap-fit ​​groove 14. Rotate the locking plate to make the notch 15 and the snap-fit ​​groove 14 misalign. When the telescopic positioning post 16 is aligned with the through hole 17, the spring pushes the top of the telescopic post into the through hole 17 to fix the locking plate 12, and finally achieve a stable connection.

[0041] 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.

[0042] 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.

[0043] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A valve well leakage monitoring device based on a vibration sensor, comprising a main gas pipeline (1) and a plurality of valve wells (2) arranged along the main gas pipeline (1), wherein each valve well (2) is provided with a pipeline valve (3), a vent (4), and a tee connector (5), wherein the pipeline valve (3) and the tee connector (5) are connected to the main gas pipeline (1), characterized in that: It also includes a vibration sensor (6), which includes a sensor body (7) and a wire (8). The top port of the tee connector (5) is connected to a branch pipe (9). An installation sleeve (10) is fitted inside the branch pipe (9). The sensor body (7) is sealed to the bottom of the installation sleeve (10), so that the sensor body (7) extends into the main gas pipeline (1). The wire (8) passes through the installation sleeve (10) and extends into the valve well (2). The top of the installation sleeve (10) is provided with a quick-connect structure. The installation sleeve (10) is connected to the top of the branch pipe (9) through the quick-connect structure and achieves a seal.

2. The valve well leakage monitoring device based on a vibration sensor according to claim 1, characterized in that: The quick-installation structure includes an end plate (11), a locking plate (12) rotatably disposed on the top of the end plate (11), and a snap-fit ​​arm (13) hinged to the side wall of the branch pipe (9). The mounting sleeve (10) is fixedly disposed at the bottom of the end plate (11). The end plate (11) is provided with a snap-fit ​​groove (14) corresponding to the snap-fit ​​arm (13). The locking plate (12) is provided with a notch (15) corresponding to the snap-fit ​​arm (13). The snap-fit ​​arm (13) is snapped into the snap-fit ​​groove (14) through the notch (15). The bottom edge of the end plate (11) is provided with a sealing ring (20). The sealing ring (20) is in close contact with the top of the branch pipe (9).

3. The valve well leakage monitoring device based on a vibration sensor according to claim 2, characterized in that: The end plate (11) is provided with a telescopic positioning post (16) at the top. The telescopic positioning posts (16) are not on the same radius. The locking plate (12) is provided with a corresponding through hole (17). The through hole (17) and the notch (15) are on the same radius. The top of the telescopic positioning post (16) extends into the through hole (17).

4. The valve well leakage monitoring device based on a vibration sensor according to claim 2, characterized in that: The branch pipe (9) has a sink groove (18) at the top and an ejector spring (19) inside. The top of the ejector spring (19) abuts against the end plate (11).

5. A valve well leakage monitoring device based on a vibration sensor according to claim 1, characterized in that: The sensor body (7) has an external thread on the top of its side wall and an internal thread on the bottom of its inner wall. The two are connected by threads. The mounting sleeve (10) has a boss (21) inside and a sealing ring (22) on the boss (21). The top of the sensor body (7) is in close contact with the sealing ring (22).

6. A valve well leakage monitoring device based on a vibration sensor according to claim 2, characterized in that: The end plate (11) and locking plate (12) are provided with a wire outlet hole (23) in the middle. The wire (8) extends out from the wire outlet hole (23). A support plug (24) is slidably sleeved on the wire (8) and the support plug (24) is inserted into the wire outlet hole (23).

7. A valve well leakage monitoring device based on a vibration sensor according to claim 6, characterized in that: The other end of the wire (8) is connected to a communication control box, which is fixed on the side wall of the valve well (2).

8. A valve well leakage monitoring device based on a vibration sensor according to claim 1, characterized in that: There is a gap between the branch pipe (9) and the mounting sleeve (10), and the vent (4) is fixedly set on the side wall of the branch pipe (9).

9. A valve well leakage monitoring device based on a vibration sensor according to claim 1, characterized in that: Each valve well (2) is equipped with two pipe valves (3), which are respectively located on both sides of the tee joint (5).

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