Wall cover device for natural gas leakage detection

Abstract

The invention belongs to the technical field of natural gas safety detection, particularly relates to a wall cover device for natural gas leakage detection, and provides a wall cover device for natural gas leakage detection in order to solve the problems that in the prior art, a gap is formed between a movable arc-shaped hollow structure and a pipeline, tiny leakage gas is exposed, and consequently alarm lag is caused. Comprising a gas supply main pipe and a plurality of shunt pipes communicated with the gas supply main pipe. The device has the beneficial effects that the external protective cover is used for sealing the joint of the gas supply main pipe and the shunt pipe, a special detection space is constructed in cooperation with the communicated leakage detection cover, leakage gas is limited and rapidly flows into the detection cover, the gas detection alarm can sense the leakage gas at the first time, and the hysteresis problem that a traditional device depends on overall environment detection is solved; the conical cover at the communication part increases the flow rate of leaked gas and forms eddy current by virtue of section shrinkage and an inner wall spiral groove to drive the rotating blades in the detection cover to rotate, thereby assisting the judgment device to operate and improving the detection sensitivity.

Description

Technical Field

[0001] This invention relates to a wall-mounted device for leak detection, specifically a wall-mounted device for natural gas leak detection, belonging to the field of natural gas safety detection technology. Background Technology

[0002] In energy-rich areas such as the Ordos Basin, the phenomenon of overlapping coal and natural gas resources is extremely common, forming a typical coal and gas coexistence mining environment. Natural gas wells are mostly targeted at dense sandstone layers at a depth of about 3,000 meters, while coal mining depths are generally concentrated in the shallow range of 600 meters. The two form a fixed vertical distribution pattern. Although gas wells are equipped with complete casing and cementing structures, high-intensity mining operations in coal mines can cause rock strata movement and stress reconstruction, which can easily lead to micro-annular gaps or even damage to the gas well casing, thereby causing the risk of natural gas leakage. Therefore, leakage detection is crucial.

[0003] A public announcement (CN119412626A) discloses a natural gas leak detection device. This device automatically detects gas leaks by moving along the outside of the gas pipe, avoiding manual operation by workers, thus improving work efficiency and reducing labor intensity. However, the existing technical solution has the following shortcomings: When the device is in use, the two polygonal blocks forming an arc-shaped hollow structure that can accommodate the gas pipe move along the outside of the pipe, creating a gap between them. For minor leaks, gas can leak out through the gap, resulting in a delayed response and failure to issue an alarm in a timely manner. Summary of the Invention

[0004] The purpose of this invention is to provide a wall cover device for natural gas leak detection, in order to solve the problem that the gap between the moving arc-shaped hollow structure of the above-mentioned device and the pipeline causes the exposure of small leaks of gas, resulting in alarm lag.

[0005] The present invention achieves the above objectives through the following technical solution: a wall cover device for natural gas leak detection, comprising a main gas supply pipe and a plurality of branch pipes connected to the main gas supply pipe; A flow divider is provided at the connection end of the main gas supply pipe and the branch pipe. The main gas supply pipe and multiple branch pipes are all connected to the flow divider. An external protective cover is fitted on the outside of the flow divider. A leak detection cover is fixedly installed on one side of the external protective cover. The leak detection cover is connected to the external protective cover. A gas detection alarm is installed on the surface of the leak detection cover. The detection end of the gas detection alarm extends into the leak detection cover. The connection points of the main gas supply pipe and multiple branch pipes to the branch cover are all covered inside the external protective cover, and the top of the leak detection cover is equipped with an exhaust pipe.

[0006] As a further aspect of the present invention, the gas detection alarm is connected to the back-end terminal via signal connection.

[0007] As a further embodiment of the present invention: a fixed rod is fixedly installed inside the leakage detection cover, and a turntable is rotatably connected to the surface of the fixed rod. Several rotating blades are evenly distributed in a ring on the surface of the turntable.

[0008] As a further embodiment of the present invention: a conical cover for guiding gas flow and driving the rotating blades to rotate is installed at the connection between the external protective cover and the leakage detection cover.

[0009] As a further embodiment of the present invention: the conical end of the cone extends into the leakage detection hood and is located close to the rotating blade, and the inner wall of the cone has multiple spiral grooves.

[0010] As a further aspect of the present invention, the leak detection cover is made of a transparent material.

[0011] As a further embodiment of the present invention: the flow divider is symmetrically equipped with two inclined fixed guide plates, and a T-shaped rod is fixedly installed on the bottom surface of each fixed guide plate. A connecting slide rod is slidably connected to the surface of each T-shaped rod. A spring is sleeved on the outside of each T-shaped rod. One end of the spring abuts against the bottom surface of one end of the connecting slide rod, and the other end of the spring abuts against the T-shaped structure of the T-shaped rod. A sealing plate is fixedly installed at the other end of the connecting slide rod.

[0012] As a further aspect of the present invention: a sealing strip is provided on one side of the sealing plate where it meets the two inclined fixed guide plates.

[0013] The beneficial effects of this invention are: the device completely seals the connection between the main gas supply pipe and the branch pipe through an external protective cover, and together with the leak detection cover connected thereto, a dedicated detection space is constructed for the pipe connection. When a leak occurs at the connection, the gas is confined within the external protective cover and flows quickly to the leak detection cover. There is no need to wait for the gas to diffuse into the large underground space. The detection end of the gas detection alarm can contact the leaking gas immediately, which completely solves the problem of lag caused by the reliance on the overall environment detection of traditional devices, and buys critical time for timely handling of leaks. The cone-shaped cover at the connection between the outer protective cover and the leak detection cover, through the cross-sectional contraction and the spiral grooves on the inner wall, increases the flow velocity of the incoming leaking gas and forms a rotating vortex, which drives the rotating blades and turntable inside the leak detection cover to rotate, allowing the gas inside the cover to convect fully. This not only avoids the local accumulation of leaking gas affecting the detection, but also helps the inspection personnel to judge whether the device is operating normally through the intuitive rotation status of the rotating blades, greatly improving the sensitivity and reliability of the detection. The structure consisting of a fixed guide plate, T-shaped rod, spring, connecting slide rod, and sealing plate at the diversion shroud utilizes spring force to ensure the sealing plate always fits tightly against the pipe connection. Combined with sealing strips, this actively enhances the sealing performance of the connection. At the same time, during normal gas supply, gas pressure can push the sealing plate downward to supply gas. This design ensures gas supply while greatly reducing the possibility of leakage at the pipe connection, reducing safety hazards from the source. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal partial structure of the outer protective cover and the leakage detection cover of the present invention; Figure 3 This is a schematic diagram of a partial internal structure of the flow divider of the present invention; Figure 4 This is a schematic diagram of the internal partial structure of the outer protective cover and the leakage detection cover of the present invention; Figure 5 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the diagram; Figure 6 For the present invention Figure 2 Enlarged schematic diagram of the structure at point B in the diagram.

[0015] In the diagram: 1. Main gas supply pipe; 2. Diverter pipe; 3. Diverter hood; 4. External protective cover; 5. Leak detection cover; 6. Exhaust pipe; 7. Conical cover; 8. Spiral groove; 9. Fixing rod; 10. Turntable; 11. Rotating blade; 12. Gas detection alarm; 13. Fixed guide plate; 14. T-shaped rod; 15. Spring; 16. Connecting slide rod; 17. Sealing plate. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1 like Figures 1 to 6 As shown, a wall cover device for detecting natural gas leaks includes a main gas supply pipe 1 and a plurality of branch pipes 2 connected to the main gas supply pipe 1. A diversion cover 3 is provided at the connection end of the gas supply main pipe 1 and the diversion pipe 2. The gas supply main pipe 1 and multiple diversion pipes 2 are all connected to the diversion cover 3. An external protective cover 4 is fitted on the outside of the diversion cover 3. A leak detection cover 5 is fixedly installed on one side of the external protective cover 4. The leak detection cover 5 is connected to the external protective cover 4, and a gas detection alarm 12 is installed on the surface of the leak detection cover 5. The detection end of the gas detection alarm 12 extends into the leak detection cover 5. The connection points of the main gas supply pipe 1 and multiple branch pipes 2 to the branch cover 3 are all covered inside the outer protective cover 4, and the top of the leak detection cover 5 is equipped with an exhaust pipe 6.

[0018] The gas supply main pipe 1 and multiple branch pipes 2 are centrally connected through the diversion hood 3, making the gas distribution more uniform and reducing the risk of leakage at the connection due to excessive local pressure. The external protective cover 4 seals all pipe connections, which can effectively limit the diffusion range of leaked gas and prevent leaked gas from directly entering the underground working space, thus buying time for detection and disposal. At the same time, it can protect the connection parts from external impacts, dust adhesion, etc., and extend the service life of the seals. The leak detection cover 5 and the external protective cover 4 form a directional gas flow channel, which allows leaked gas to quickly gather in the detection area, improving detection sensitivity. The independent detection space can reduce the interference of the complex underground environment on detection accuracy. The detection end of the gas detection alarm 12 directly contacts the space where there may be leaked gas, and can detect changes in gas concentration at the first time. Compared with traditional environmental monitoring methods, the response speed is faster. The exhaust pipe 6 is connected to the external recovery pipe (not shown in the figure) for recovering the leaked gas.

[0019] Furthermore, the gas detection alarm 12 is connected to the back-end terminal signal.

[0020] The gas detector alarm 12 is connected to the back-end terminal signal, realizing the linkage between local alarm and remote monitoring. Ground management personnel can obtain information on underground pipeline leaks in real time without relying on reports from underground personnel, thus shortening the emergency response time.

[0021] Furthermore, a fixing rod 9 is fixedly installed inside the leak detection cover 5, and a turntable 10 is rotatably connected to the surface of the fixing rod 9. Several rotating blades 11 are evenly distributed in a ring on the surface of the turntable 10.

[0022] When leaking gas enters the leak detection hood 5, the airflow will drive the rotating blades 11 and the turntable 10 to rotate, causing the gas inside the hood to form convection, thus preventing the leaking gas from accumulating locally and causing the gas detection alarm 12 to respond late. At the same time, it is convenient for inspection personnel to observe the status of the rotating blades 11 to determine whether there is a leak at the connection.

[0023] Furthermore, a cone shroud 7 is installed at the connection between the outer protective cover 4 and the leak detection cover 5 to drive the rotating blade 11 to rotate for gas diversion.

[0024] The cone shroud 7 has a guiding function, which can concentrate the leaked gas in the outer protective cover 4 into the leak detection cover 5, increase the gas flow speed, and at the same time increase the airflow impact force through the cross-sectional contraction effect, ensuring that the rotating blade 11 can be effectively driven to rotate, and enhance the gas disturbance effect.

[0025] Example 2 Improvements based on Example 1: Furthermore, the conical end of the cone shroud 7 extends into the leak detection shroud 5 and is positioned close to the rotating blade 11, and the inner wall of the cone shroud 7 has multiple spiral grooves 8.

[0026] The conical end close to the rotating blade 11 can reduce the loss of gas kinetic energy and improve the rotation efficiency of the rotating blade 11. The spiral groove 8 can make the airflow form a rotating vortex and enhance the driving force on the rotating blade 11.

[0027] Furthermore, the leak detection cover 5 is made of a transparent material.

[0028] Staff can directly observe the working status of the rotating blade 11 and quickly determine whether the device is operating normally.

[0029] Furthermore, the diffuser 3 is symmetrically equipped with two inclined fixed guide plates 13. A T-shaped rod 14 is fixedly installed on the bottom surface of each fixed guide plate 13. A connecting slide rod 16 is slidably connected to the surface of each T-shaped rod 14. A spring 15 is sleeved on the outside of the T-shaped rod 14. One end of the spring 15 abuts against the bottom surface of one end of the connecting slide rod 16, and the other end of the spring 15 abuts against the T-shaped structure of the T-shaped rod 14. A sealing plate 17 is fixedly installed on the other end of the connecting slide rod 16.

[0030] The fixed guide plate 13 can guide the gas to flow smoothly, reduce the impact of airflow on the pipe connection, and reduce the risk of leakage. The spring 15 applies continuous pressure to the sealing plate 17 through the connecting slide rod 16, so that the sealing plate 17 fits tightly against the connection part and enhances the sealing effect. When connected, the gas pressure overcomes the elastic force of the spring 15, and the gas pushes the sealing plate 17 down, so that the gas in the gas supply main pipe 1 can be introduced into the diversion pipe 2 for diversion gas supply.

[0031] Furthermore, a sealing strip is provided on one side of the sealing plate 17 where it meets the two inclined fixed guide plates 13.

[0032] The sealing strip can fill the tiny gaps between the sealing plate 17 and the fixed guide plate 13, further improving the sealing performance.

[0033] Working principle: The device is mainly composed of components such as gas supply main pipe 1, diversion pipe 2, diversion hood 3, external protective cover 4, leak detection cover 5, and gas detection alarm 12. Under normal working conditions, natural gas is transported to the diversion hood 3 through the gas supply main pipe 1, and then distributed to each working area through multiple diversion pipes 2. In order to achieve targeted monitoring of the pipeline connection, the device is equipped with an external protective cover 4 on the outside of the connection end of the gas supply main pipe 1 and the diversion pipe 2 and the diversion hood 3, which completely covers all connection parts. When a gas leak occurs at the connection, the leaked gas will not directly diffuse into the underground working space, but will be confined within the external protective cover 4. One side of the outer protective cover 4 is connected to a leak detection cover 5. Leaking gas enters the leak detection cover 5 through the connection. The gas detection alarm 12 installed on the surface of the leak detection cover 5 extends its detection end into the cover and can quickly detect the leaking gas. When the gas concentration reaches the preset threshold, the gas detection alarm 12 immediately issues an audible and visual alarm and transmits the alarm signal to the back-end terminal to achieve dual prompts at the local and remote levels. A cone shroud 7 is installed at the connection between the outer protective cover 4 and the leak detection cover 5. Its cone-shaped end is close to the rotating blade 11. When the leaking gas enters the leak detection cover 5 through the cone shroud 7, the gas flow rate increases due to the narrowing of the channel cross section. The spiral groove 8 on the inner wall of the cone shroud 7 causes the gas to form a rotating airflow, which drives the rotating blade 11 and the turntable 10 to rotate, causing the gas to flow in the leak detection cover 5. This allows the detection end of the gas detection alarm 12 to quickly contact the leaking gas, shortening the response time. The transparent leak detection cover 5 makes it easy for inspection personnel to observe the status of the rotating blade 11 and determine whether the device is operating normally. Two inclined fixed guide plates 13 on the diversion hood 3 guide the gas flow and reduce the impact on the connection. The fixed guide plates 13 drive the sealing plate 17 through the connecting slide rod 16 connected by the T-shaped rod 14 and the spring 15. Under the elastic force of the spring 15, the sealing plate 17 always fits the connection part. With the sealing strip on the sealing plate 17, the sealing performance of the connection is enhanced and the risk of leakage is reduced. In the event of an accidental leak, this structure can also slow down the gas diffusion speed, buy time for detection and disposal. When connected, under the pressure of the gas, the gas pushes the sealing plate 17 down, so that the gas in the gas supply main pipe 1 can be introduced into the diversion pipe 2 for gas diversion.

[0034] It should be noted that: exhaust pipe 6 is connected to the external recovery pipe (not shown in the diagram) and is used to recover leaked gas.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wall-mounted device for detecting natural gas leaks, comprising a main gas supply pipe (1) and a plurality of branch pipes (2) connected to the main gas supply pipe (1); characterized in that: A diversion cover (3) is provided at the connection end of the gas supply main pipe (1) and the diversion pipe (2). The gas supply main pipe (1) and multiple diversion pipes (2) are all connected to the diversion cover (3). An external protective cover (4) is fitted on the outside of the diversion cover (3). A leak detection cover (5) is fixedly installed on one side of the external protective cover (4). The leak detection cover (5) is connected to the external protective cover (4). A gas detection alarm (12) is installed on the surface of the leak detection cover (5). The detection end of the gas detection alarm (12) extends into the leak detection cover (5). The connection points of the main gas supply pipe (1) and multiple branch pipes (2) with the branch cover (3) are all covered inside the outer protective cover (4), and the top of the leak detection cover (5) is equipped with an exhaust pipe (6).

2. The wall-mounted device for natural gas leak detection according to claim 1, characterized in that: The gas detection alarm (12) is connected to the back-end terminal signal.

3. A wall-mounted device for detecting natural gas leaks according to claim 1, characterized in that: A fixing rod (9) is fixedly installed inside the leakage detection cover (5). A turntable (10) is rotatably connected to the surface of the fixing rod (9). Several rotating blades (11) are evenly distributed in a ring on the surface of the turntable (10).

4. A wall-mounted device for detecting natural gas leaks according to claim 1, characterized in that: A cone cover (7) for driving the rotating blade (11) to rotate for gas diversion is installed at the connection between the external protective cover (4) and the leakage detection cover (5).

5. A wall-mounted device for detecting natural gas leaks according to claim 4, characterized in that: The conical end of the cone (7) extends into the leak detection cover (5) and is located close to the rotating blade (11), and the inner wall of the cone (7) has multiple spiral grooves (8).

6. A wall-mounted device for detecting natural gas leaks according to claim 4, characterized in that: The leak detection cover (5) is made of transparent material.

7. A wall-mounted device for detecting natural gas leaks according to claim 1, characterized in that: The flow divider (3) is symmetrically equipped with two inclined fixed guide plates (13). A T-shaped rod (14) is fixedly installed on the bottom surface of each fixed guide plate (13). A connecting slide rod (16) is slidably connected to the surface of each T-shaped rod (14). A spring (15) is sleeved on the outside of each T-shaped rod (14). One end of the spring (15) abuts against the bottom surface of one end of the connecting slide rod (16), and the other end of the spring (15) abuts against the T-shaped structure of the T-shaped rod (14). A sealing plate (17) is fixedly installed on the other end of the connecting slide rod (16).

8. A wall-mounted device for detecting natural gas leaks according to claim 7, characterized in that: A sealing strip is provided on one side of the sealing plate (17) where it meets the two inclined fixed guide plates (13).

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