Intelligent natural gas diffusing pipe

Abstract

The invention discloses an intelligent natural gas bleeder, which relates to the technical field of bleeders, comprises a first bleeder fitting butted with a bleeder valve on a gas pipeline, and is characterized in that one end, far away from the gas pipeline, of the first bleeder fitting is butted and communicated with a flexible pipeline; the end, away from the first diffusing pipe fitting, of the flexible pipeline communicates with a second diffusing pipe fitting in a butt joint mode, a supporting frame placed on the ground is installed on the outer pipe wall of the second diffusing pipe fitting and used for bearing the weight of the second diffusing pipe fitting, and a bypass pipe fitting is arranged on the pipe wall, close to the top end, of the first diffusing pipe fitting. And the bypass pipe fitting is used for emptying and replacing natural gas in the gas pipeline. The problem that a traditional bleeder is inconvenient to carry is solved through a modular structure, the flexible pipeline and the supporting frame adapt to the complex environment of a deep well, intelligent detection is achieved through the integrated monitoring mechanism, connection sealing performance is guaranteed through the air leakage detection mechanism, and operation safety and efficiency are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of diffusion pipe, in particular to a natural gas intelligent diffusion pipe. BACKGROUND

[0002] The natural gas diffusion pipe is an indispensable safety device in the operation, maintenance and emergency repair of urban gas pipeline network. Its main function is to safely guide the residual natural gas in the pipeline to the high altitude far from the operation area for release and dilution when the pipeline is shut down, replaced, repaired or leaks, thereby effectively preventing the accumulation of gas in low-lying areas or enclosed spaces and avoiding safety accidents such as fire, explosion or oxygen deficiency asphyxiation, and is a key device to protect the lives and property of workers and the public.

[0003] At present, the traditional diffusion pipe commonly used in the daily operation and emergency rescue of the gas industry has many shortcomings. First of all, the specifications, models and interface types of the gas diffusion pipe in use are various, resulting in large space occupation and messy placement in the storage of the repair vehicle, and it is difficult to quickly identify and use in emergency situations. Secondly, in order to deal with pipelines of different diameters and pressures, workers usually need to carry a large number of accessories and tools such as diffusion pipes of multiple models, various conversion joints, valves, pressure gauges and adjustable wrenches, making the entire set of equipment heavy and inconvenient to carry, which reduces the emergency response efficiency. Thirdly, for facilities such as valve wells and pressure regulating boxes located in deep wells or underground spaces, the existing diffusion pipe is often difficult to effectively extend to the wellhead for safe diffusion due to its fixed length and rigid structure, which poses a safety hazard. In addition, the existing detection operation process has complicated steps: before detecting the gas concentration and pressure, valves, pressure gauges and various conversion joints need to be temporarily assembled on the diffusion pipe, which not only consumes time and effort in operation, but also easily causes interface wear during repeated disassembly and assembly, introducing new leakage points. Most importantly, when detecting the gas concentration, the connection between the pipeline and the detection instrument usually lacks effective in-situ leakage detection function. If gas leaks occur at this connection, the leaked gas will directly escape into the atmosphere without being captured by the detection instrument, resulting in a lower detected gas concentration than the actual concentration in the pipeline. This "negative deviation" can seriously mislead the judgment of the workers on the safety of the site, which may misjudge the dangerous environment as a safe environment, thereby burying a huge safety accident hazard. SUMMARY

[0004] The present application provides a natural gas intelligent diffusion pipe, which can solve the problems of the conventional diffusion pipe in the prior art, such as multiple specifications, inconvenience to carry, difficulty to adapt to deep well environment, complicated detection operation steps and lack of leakage detection function at the key connection, resulting in safety misjudgment.

[0005] The purpose of the present application can be achieved by the following technical solutions: The application discloses a natural gas intelligent diffusion pipe, which comprises a first diffusion pipe part which is connected with a diffusion valve on a gas pipeline, a flexible pipe which is connected with the first diffusion pipe part at one end away from the gas pipeline, a second diffusion pipe part which is connected with the flexible pipe at one end away from the first diffusion pipe part, a support frame which is arranged on the ground and is used for bearing the weight of the second diffusion pipe part and is arranged on the outer wall of the second diffusion pipe part, a bypass pipe part which is arranged on the wall of the first diffusion pipe part close to the top end and is used for emptying and replacing natural gas in the gas pipeline, and a monitoring mechanism which is arranged on one end of the second diffusion pipe part away from the flexible pipe and is used for detecting the concentration of natural gas in real time, and a gas leakage detection mechanism which is arranged between the monitoring mechanism and the second diffusion pipe part.

[0006] As a further scheme of the application, the first diffusion pipe part comprises a first steel pipe with a conversion joint, a second steel pipe with a first quick connector and a ball valve, the conversion joint is arranged at the bottom end of the first steel pipe and is connected with the gas outlet of the diffusion valve through the conversion joint, the ball valve is arranged between the top end of the first steel pipe and the bottom end of the second steel pipe and is used for controlling the opening and closing of the first steel pipe and the second steel pipe, and the first quick connector is arranged at the top end of the second steel pipe.

[0007] As a further scheme of the application, the second diffusion pipe part comprises a second quick connector, a third steel pipe and a threaded connector, the second quick connector is arranged at the bottom end of the third steel pipe, the threaded connector is arranged at the top end of the third steel pipe and is connected with the monitoring mechanism through the threaded connector, and the end of the flexible pipe away from the first diffusion pipe part is inserted into the second quick connector.

[0008] As a further scheme of the application, the monitoring mechanism comprises a shell with a threaded interface, a laser, a reflector and a photoelectric detector, the shell is symmetrically provided with a partition plate which divides an air chamber, the threaded interface is arranged at the bottom of the shell and is connected with the air chamber, the threaded interface is threadedly connected with the threaded connector, the two reflectors are arranged on the opposite sides of the two partition plates, the laser and the photoelectric detector are arranged on the side wall close to the two ends of one of the partition plates, and the laser beam emitted by the laser is received by the photoelectric detector after being reflected multiple times through the two reflectors.

[0009] As a further scheme of the application, the support frame comprises a mounting ring, three telescopic legs, a connecting rod and a sliding part, the mounting ring is fixedly sleeved on the outer wall of the third steel pipe, the telescopic legs are uniformly distributed along the circumference of the mounting ring and are hinged to the mounting ring, and the sliding part is movably sleeved on the outer wall of the third steel pipe.

[0010] As a further scheme of the present application, the monitoring mechanism further comprises a display screen, a microprocessor, a battery pack, a remote transmission antenna and a warning indicator light, the display screen is inlaidly installed at a side wall of the shell, the microprocessor and the battery pack are both installed at an inner side wall of the shell, the remote transmission antenna and the warning indicator light are both installed at the top of the shell, and a diffusion port communicating with the air chamber is also installed at the top of the shell.

[0011] As a further scheme of the present application, the bypass pipe comprises a branch pipe, a pressure gauge and a nitrogen injection port provided with a nitrogen injection valve, the branch pipe is communicatively arranged at a side wall of the first steel pipe near the top end, and an end of the branch pipe away from the first steel pipe is in a closed structure, the nitrogen injection port is communicatively arranged at a top position of the end of the branch pipe away from the first steel pipe, the nitrogen injection valve is installed on the nitrogen injection port, and the pressure gauge is installed on the branch pipe and arranged between the first steel pipe and the branch pipe.

[0012] As a further scheme of the present application, the gas leakage detection mechanism comprises a liquid storage shell, a piston, a communication member, an elastic extrusion member and a detection shell, the liquid storage shell and the detection shell are both sleeved on the outer pipe wall of the third steel pipe near the top end, and the detection shell is above the liquid storage shell, the piston is installed in the liquid storage shell and is slidably sleeved with the third steel pipe, the communication member is installed between the piston and the detection shell, and the elastic extrusion member is installed on the piston, when the threaded interface is screwed with the threaded joint, the piston is compressed to slide downward by the elastic extrusion member, so that the liquid in the liquid storage shell enters the detection shell through the communication member.

[0013] As a further scheme of the present application, the elastic extrusion member comprises a slide rod and a spring, the slide rod is installed at the top of the piston and slidably extends upward through the top edge of the liquid storage shell, the spring is installed between the top edge of the liquid storage shell and the piston and is sleeved on the slide rod, and a pressing ring for extruding the slide rod is fixedly sleeved on the outside of the threaded interface.

[0014] As a further scheme of the present application, the communication member comprises a fixed pipe and a hose, the fixed pipe penetrates through the piston and the top end of the fixed pipe is in communication with the hose, and an end of the hose away from the fixed pipe is connected with the bottom of the liquid storage shell.

[0015] The present application has the following beneficial effects: 1、In the present application, the modular pipeline system composed of the first diffusion pipe, the flexible pipeline and the second diffusion pipe is provided, so that the whole diffusion pipe has the ability of rapid assembly and flexible pipeline arrangement. The first diffusion pipe is responsible for the connection with the gas source, the flexible pipeline is convenient for adjusting the diffusion direction and height according to the local terrain (such as a deep well), and the second diffusion pipe is the core of the bearing terminal component. This structure effectively solves the problems of rigid specification of the diffusion pipe in the prior art, difficulty in adapting to the deep well environment, and inconvenience of carrying and messy placement of various accessories.

[0016] 2、The present application, by integrating bypass pipe on the first diffusion pipe, realizes the function of pressure monitoring and inert gas injection for pipeline replacement without disassembling the main pipeline, integrates the traditional complex steps of additional valve and pressure gauge, simplifies the operation process, and improves the efficiency and convenience of emptying and replacement operation.

[0017] 3、The present application, by integrating the monitoring mechanism for real-time detection of natural gas concentration at the end of the second diffusion pipe, realizes in-situ and real-time monitoring of gas concentration during diffusion, without the need for external detection equipment, completely changing the traditional cumbersome and error-prone operation mode of carrying and temporarily connecting multiple detection instruments, greatly simplifying the detection steps and making data acquisition more direct and reliable.

[0018] 4、The present application, by setting a gas leakage detection mechanism between the monitoring mechanism and the second diffusion pipe, can effectively monitor the sealing state of the key connection. The mechanism can timely detect gas leakage caused by loose connection, thereby avoiding the risk of misjudgment caused by gas loss and low concentration reading, greatly improving the accuracy of detection data and the safety of the entire operation process. BRIEF DESCRIPTION OF DRAWINGS

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

[0020] Figure 1 is a perspective view of a natural gas intelligent diffusion pipe of the present application; Figure 2 is a perspective view of a natural gas intelligent diffusion pipe in use according to the present application; Figure 3 is a perspective view of the connection between the second diffusion pipe and the support frame of a natural gas intelligent diffusion pipe according to the present application; Figure 4 is a perspective view of the monitoring mechanism of a natural gas intelligent diffusion pipe according to the present application; Figure 5 is a sectional view of the monitoring mechanism of a natural gas intelligent diffusion pipe according to the present application; Figure 6 is a perspective view of the connection between the bypass pipe and the first steel pipe of a natural gas intelligent diffusion pipe according to the present application; Figure 7 is a perspective view of the connection between the gas leakage detection mechanism and the monitoring mechanism of a natural gas intelligent diffusion pipe according to the present application; Figure 8 is a perspective view of the connection between the gas leakage detection mechanism and the threaded joint of a natural gas intelligent diffusion pipe according to the present application; Figure 9 is a sectional view of the connection between the gas leakage detection mechanism and the threaded joint of a natural gas intelligent diffusion pipe according to the present application; Figure 10 This is a perspective view of the connection between the piston, the connecting member, and the elastic compression member in a natural gas intelligent venting pipe according to the present invention.

[0021] In the diagram: 100, Gas pipeline; 101, Vent valve; 200, First vent fitting; 201, Converter joint; 202, First steel pipe; 203, First quick coupling; 204, Second steel pipe; 205, Ball valve; 300, Flexible piping; 400, Second vent fitting; 401, Second quick coupling; 402, Third steel pipe; 403, Threaded joint; 500, Support frame; 501, Mounting ring; 502, Telescopic leg; 503, Connecting rod; 504, Sliding element; 600, Bypass fitting; 601, Branch pipe; 602, Pressure gauge; 603, Nitrogen injection valve; 604. Nitrogen injection port; 700, Monitoring mechanism; 701, Housing; 7011, Threaded interface; 7012, Vent port; 702, Laser; 703, Reflector; 704, Photodetector; 705, Display screen; 706, Microprocessor; 707, Battery pack; 708, Remote antenna; 709, Warning indicator light; 800, Leakage detection mechanism; 801, Liquid reservoir; 802, Piston; 803, Connecting component; 8031, Fixing tube; 8032, Hose; 804, Elastic compression component; 8041, Slide rod; 8042, Spring; 805, Detection housing; 900, Pressure ring. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0023] like Figures 1-10 As shown, the present invention is a natural gas intelligent venting pipe, including a first venting pipe fitting 200 connected to a venting valve 101 on a gas pipeline 100. A flexible pipe 300 is connected to the end of the first venting pipe fitting 200 away from the gas pipeline 100, and a second venting pipe fitting 400 is connected to the end of the flexible pipe 300 away from the first venting pipe fitting 200. A support frame 500 placed on the ground is installed on the outer wall of the second venting pipe fitting 400, and the support frame 500 is used to support the weight of the second venting pipe fitting 400. A bypass pipe fitting 600 is installed near the top of the first venting pipe fitting 200, and the bypass pipe fitting 600 is used to vent and replace the natural gas in the gas pipeline 100. A monitoring mechanism 700 for real-time detection of natural gas concentration is installed at the end of the second venting pipe fitting 400 away from the flexible pipe 300, and a gas leakage detection mechanism 800 is installed between the monitoring mechanism 700 and the second venting pipe fitting 400.

[0024] It should be noted that during use, the first vent fitting 200 is connected to the vent valve 101 of the gas pipeline 100. After the valve is opened, the natural gas flows sequentially through the first vent fitting 200, the flexible pipeline 300, and the second vent fitting 400. The flexible pipeline 300 can flexibly adjust its direction and length according to the site terrain to adapt to complex environments such as deep wells. The second vent fitting 400 is stably supported on the ground by the support frame 500, which not only ensures a safe venting height but also effectively reduces the pressure on the vent valve 101, making it less prone to damage due to excessive weight. The bypass fitting 600 integrated on the first vent fitting 200 can perform pressure monitoring and nitrogen injection to achieve pipeline replacement operations. The monitoring mechanism 700 located at the end of the system performs real-time concentration detection of the flowing natural gas, while the leak detection mechanism 800 continuously monitors the sealing status at the connection between the monitoring mechanism 700 and the second vent fitting 400 to ensure the accuracy of the detection data.

[0025] like Figures 1-2 As shown, the first venting pipe fitting 200 includes a first steel pipe 202 with a conversion joint 201, a second steel pipe 204 with a first quick connector 203, and a ball valve 205. The conversion joint 201 is installed at the bottom end of the first steel pipe 202, and the first steel pipe 202 is connected to the exhaust port of the venting valve 101 through the conversion joint 201. The ball valve 205 is installed between the top end of the first steel pipe 202 and the bottom end of the second steel pipe 204, and the ball valve 205 is used to control the on / off state of the first steel pipe 202 and the second steel pipe 204. The first quick connector 203 is installed at the top end of the second steel pipe 204, and the end of the flexible pipeline 300 away from the second venting pipe fitting 400 is inserted into the first quick connector 203.

[0026] It should be noted that the first vent fitting 200 is quickly adapted to the exhaust port of the vent valve 101 through the conversion connector 201 at its bottom. During operation, the ball valve 205 can be operated to control the gas flow. The gas flows through the first steel pipe 202 and the second steel pipe 204 in sequence, and finally connects to the flexible pipeline 300 through the first quick connector 203 installed at the top of the second steel pipe 204. In this embodiment, the first quick connector 203 is a high-pressure socket quick connector. The high-pressure socket structure of the first quick connector 203 ensures both the convenience of the connection process and the reliability of the sealing at the interface, effectively solving the problem of having to carry multiple connectors and tools in traditional operations, and significantly improving the efficiency of on-site installation.

[0027] like Figures 2-3As shown, the second venting pipe fitting 400 includes a second quick connector 401, a third steel pipe 402, and a threaded connector 403. The second quick connector 401 is installed at the bottom end of the third steel pipe 402. The end of the flexible pipe 300 away from the first venting pipe fitting 200 is inserted into the second quick connector 401. The threaded connector 403 is installed at the top end of the third steel pipe 402, and the third steel pipe 402 is connected to the monitoring mechanism 700 through the threaded connector 403.

[0028] It should be noted that the flexible pipeline 300 achieves rapid connection with the third steel pipe 402 of the second venting fitting 400 through the second quick connector 401. In this embodiment, the second quick connector 401 has the same structure as the first quick connector 203, and is also a high-pressure socket quick connector, ensuring that the intermediate connection and the inlet connection maintain the same convenience and sealing reliability. After the gas flows through the third steel pipe 402, it establishes a connection with the monitoring mechanism 700 through the threaded connector 403 at the top. This standardized design using quick connectors of the same specification significantly improves the standardization of pipeline connection and disassembly and assembly efficiency, effectively solving the cumbersome operation problem of frequently changing different specification connectors in traditional operations.

[0029] like Figure 2 and Figure 5 As shown, the monitoring mechanism 700 includes a housing 701 with a threaded interface 7011, a laser 702, a reflector 703, and a photodetector 704. The housing 701 has symmetrically arranged partitions that divide the air chamber. The threaded interface 7011 is installed at the bottom of the housing 701 and communicates with the air chamber. The threaded interface 7011 is threadedly connected to the threaded connector 403. Two reflectors 703 are respectively installed on the opposite sides of the two partitions. The laser 702 and the photodetector 704 are installed on the side wall of one of the partitions near both ends. The laser beam emitted by the laser 702 is received by the photodetector 704 after being reflected multiple times by the two reflectors 703.

[0030] It should be noted that the monitoring mechanism 700 achieves a sealed connection with the threaded joint 403 of the second venting pipe 400 through the threaded interface 7011 at the bottom of the housing 701. After the gas enters the gas chamber inside the housing 701, the laser 702 emits a near-infrared laser beam with a wavelength precisely tuned to the characteristic absorption line of methane. This laser beam undergoes multiple reflections through two mirrors 703 within the gas chamber, forming a long optical path propagation, which greatly increases the interaction distance between the laser and the gas molecules. When methane gas is present, the gas molecules absorb the laser energy of a specific wavelength, causing the light intensity to attenuate. After multiple reflections, the laser is finally received by the photodetector 704. By comparing the difference between the emitted and received light intensities, the gas concentration can be accurately calculated based on the Lambert-Beer law. This detection method using long-path laser absorption spectroscopy significantly improves the detection sensitivity, enabling the detection of trace leaks at the ppm level. It effectively solves the measurement deviation problem caused by inaccurate sampling in traditional detection methods, providing reliable data support for on-site operations.

[0031] like Figures 2-3 As shown, the support frame 500 includes a mounting ring 501, telescopic legs 502, a connecting rod 503, and a sliding member 504. The mounting ring 501 is fixedly fitted onto the outer wall of the third steel pipe 402. The three telescopic legs 502 are evenly distributed around the mounting ring 501 and are hinged to the mounting ring 501. The sliding member 504 is movably fitted onto the outer wall of the third steel pipe 402. One end of the connecting rod 503 is hinged to the side wall of the telescopic leg 502, and the other end of the connecting rod 503 is hinged to the side wall of the sliding member 504.

[0032] It should be noted that in this embodiment, the telescopic leg 502 can be adjusted in length as needed. During operation, the sliding part 504, which is movably sleeved on the third steel pipe 402, is adjusted up and down, which drives the connecting rod 503 hinged to it to push the telescopic leg 502 to unfold or retract, thereby realizing the rapid adjustment of the support height. This allows the entire support frame 500 to be adjusted by a single person, ensuring that the second venting pipe 400 is always at a safe venting height. It also effectively solves the problems of cumbersome adjustment and inconvenience of carrying traditional supports, and is particularly suitable for stable operation in uneven sites such as deep wells and slopes.

[0033] like Figure 2 and Figures 4-5 As shown, the monitoring mechanism 700 also includes a display screen 705, a microprocessor 706, a battery pack 707, a remote transmission antenna 708, and a warning indicator light 709. The display screen 705 is embedded in one side wall of the housing 701. The microprocessor 706 and the battery pack 707 are both installed on the inner side wall of the housing 701. The remote transmission antenna 708 and the warning indicator light 709 are both installed on the top of the housing 701. The top of the housing 701 is also equipped with a vent 7012 that communicates with the air chamber.

[0034] It should be noted that the microprocessor 706 processes the laser intensity data collected by the photodetector 704 in real time and calculates the gas concentration. The processing result is displayed in real time on the display screen 705 on the side wall of the housing 701. The battery pack 707 provides independent power supply for the laser 702, photodetector 704 and microprocessor 706. When the gas concentration exceeds the standard, the microprocessor 706 immediately triggers the top warning indicator 709 to issue a visual alarm. At the same time, the concentration data and alarm information are wirelessly transmitted to the monitoring center through the remote transmission antenna 708. The detected gas is finally safely discharged through the vent 7012 on the top of the housing 701. This intelligent design that integrates detection, display, alarm and remote communication realizes the dual guarantee of real-time local reading of gas concentration data and remote monitoring. It effectively solves the problems of data recording relying on manual and delayed alarm response in traditional detection, and significantly improves the safety of on-site operations and the level of information management.

[0035] like Figure 2 and Figure 6 As shown, the bypass fitting 600 includes a branch pipe 601, a pressure gauge 602, and a nitrogen injection port 604 with a nitrogen injection valve 603. The branch pipe 601 is connected to the side wall of the first steel pipe 202 near the top, and the end of the branch pipe 601 away from the first steel pipe 202 is a closed structure. The nitrogen injection port 604 is connected to the top position of the end of the branch pipe 601 away from the first steel pipe 202. The nitrogen injection valve 603 is installed on the nitrogen injection port 604. The pressure gauge 602 is installed on the branch pipe 601 and is located between the first steel pipe 202 and the branch pipe 601.

[0036] It should be noted that the pressure gauge 602, installed on the branch pipe 601, can monitor the pressure changes of the main pipeline in real time. When pipeline replacement work is required, nitrogen gas is introduced from the nitrogen injection port 604 by opening the nitrogen injection valve 603. The nitrogen gas enters the first steel pipe 202 through the branch pipe 601 to achieve safe replacement. This design, which integrates pressure monitoring and gas replacement functions, allows operators to complete pressure reading and inert gas injection operations without disassembling the main pipeline.

[0037] like Figure 1 and Figures 7-9As shown, the leak detection mechanism 800 includes a liquid storage shell 801, a piston 802, a connecting member 803, an elastic compression member 804, and a detection shell 805. The liquid storage shell 801 and the detection shell 805 are both fitted onto the outer wall of the third steel pipe 402 near the top, and the detection shell 805 is located above the liquid storage shell 801. The piston 802 is installed inside the liquid storage shell 801, and the piston 802 is slidably connected to the third steel pipe 402. The connecting member 803 is installed between the piston 802 and the detection shell 805. The elastic compression member 804 is installed on the piston 802. When the threaded interface 7011 is tightened with the threaded joint 403, the piston 802 is compressed by the elastic compression member 804 and slides down, so that the liquid in the liquid storage shell 801 enters the detection shell 805 through the connecting member 803.

[0038] It should be noted that in this embodiment, the liquid in the storage shell 801 is water, and the detection shell 805 is made of transparent acrylic. When the threaded interface 7011 of the monitoring mechanism 700 is tightened with the threaded connector 403, the axial pressure generated pushes the piston 802 downward in the storage shell 801 through the elastic extrusion member 804, pressing the liquid in the storage shell 801 into the detection shell 805 above through the connecting member 803 to form a visible liquid column. This design realizes the self-verification function of the connection sealing state through mechanical linkage. The detection preparation is automatically completed during the tightening process. When a leak occurs at the connection, external gas will enter the detection shell 805 through the leak point, generating continuous bubbles in the liquid column to form an intuitive visual warning. This effectively solves the problem that it is difficult to detect the slight leakage at the connection of the detection instrument in traditional operations, which leads to inaccurate concentration readings, and provides an important guarantee for the reliability of the detection data.

[0039] like Figures 9-10 As shown, the elastic compression member 804 includes a slide rod 8041 and a spring 8042. The slide rod 8041 is mounted on the top of the piston 802, and the top end of the slide rod 8041 slides through the top edge of the liquid storage shell 801 and extends upward. The spring 8042 is mounted between the piston 802 and the top edge of the liquid storage shell 801, and the spring 8042 is sleeved on the slide rod 8041. A pressure ring 900 for compressing the slide rod 8041 is fixedly sleeved on the outside of the threaded interface 7011.

[0040] It should be noted that when the threaded interface 7011 of the monitoring mechanism 700 is tightened with the threaded connector 403, the pressure ring 900 fixed to the threaded interface 7011 moves down and squeezes the slide rod 8041. The slide rod 8041 drives the piston 802 to overcome the elastic force of the spring 8042 and move smoothly down in the liquid storage shell 801, thereby pressing the liquid in the liquid storage shell 801 into the detection shell 805 through the connecting member 803 to form a detection liquid column. When a leak occurs at the connection, external gas enters the detection shell 805 and generates continuous bubbles in the liquid column, forming a visual leak warning. When disassembling, as the threaded interface 7011 is unscrewed, the pressure ring 900 releases the pressure on the slide rod 8041, the spring 8042 pushes the piston 802 to reset, and the liquid in the detection shell 805 flows back to the liquid storage shell 801 through the connecting member 803, realizing automatic reset.

[0041] like Figures 9-10 As shown, the connecting member 803 includes a fixed tube 8031 ​​and a flexible tube 8032. The fixed tube 8031 ​​passes through the piston 802 and its top end is connected to the flexible tube 8032. The end of the flexible tube 8032 away from the fixed tube 8031 ​​is connected to the bottom of the liquid storage shell 801.

[0042] It should be noted that when the piston 802 is squeezed downwards, the liquid in the reservoir 801 is forced into the detection shell 805 through the hose 8032 and the fixed tube 8031; when the piston 802 rises and resets under the action of the spring 8042, the fixed tube 8031 ​​moves upwards accordingly and its top end is tightly pressed against the bottom of the detection shell 805 at the connection point of the hose 8032, forming a mechanical seal, ensuring that the liquid flowing back to the reservoir 801 will not leak out. This automatic sealing design not only ensures the reliability of the detection process, but also realizes the complete reset of the system, providing convenience for reuse.

[0043] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A smart bleed pipe for natural gas comprising a first bleed pipe fitting (200) interfacing with a bleed valve (101) on a gas pipeline (100), characterized in that, The first diffusion pipe (200) is connected to the flexible pipe (300) at one end away from the gas pipeline (100), and the flexible pipe (300) is connected to the second diffusion pipe (400) at one end away from the first diffusion pipe (200), the outer tube wall of the second diffusion pipe (400) is provided with a support frame (500) placed on the ground, and the support frame (500) is used to bear the weight of the second diffusion pipe (400), the first diffusion pipe (200) is provided with a bypass pipe (600) at the tube wall near the top end, and the bypass pipe (600) is used to empty and replace the natural gas in the gas pipeline (100), the second diffusion pipe (400) is provided with a monitoring mechanism (700) for real-time detection of the concentration of natural gas at one end away from the flexible pipe (300), and a gas leakage detection mechanism (800) is installed between the monitoring mechanism (700) and the second diffusion pipe (400).

2. A smart vent for natural gas as defined in claim 1, wherein The first diffusion pipe (200) includes a first steel pipe (202) with a conversion joint (201), a second steel pipe (204) with a first quick connector (203), and a ball valve (205), the conversion joint (201) is installed at the bottom end of the first steel pipe (202), and the first steel pipe (202) is connected with the exhaust port of the diffusion valve (101) through the conversion joint (201), the ball valve (205) is installed between the top end of the first steel pipe (202) and the bottom end of the second steel pipe (204), and the ball valve (205) is used to control the on-off of the first steel pipe (202) and the second steel pipe (204), the first quick connector (203) is installed at the top end of the second steel pipe (204), and the flexible pipe (300) is inserted into the first quick connector (203) at one end away from the second diffusion pipe (400).

3. A smart vent for natural gas as defined in claim 1, wherein, The second diffusion pipe (400) includes a second quick connector (401), a third steel pipe (402), and a threaded joint (403), the second quick connector (401) is installed at the bottom end of the third steel pipe (402), the flexible pipe (300) is inserted into the second quick connector (401) at one end away from the first diffusion pipe (200), the threaded joint (403) is installed at the top end of the third steel pipe (402), and the third steel pipe (402) is connected with the monitoring mechanism (700) through the threaded joint (403).

4. A smart vent for natural gas as defined in claim 3, wherein, The monitoring mechanism (700) comprises a shell (701) provided with a threaded interface (7011), a laser (702), a mirror (703) and a photodetector (704), the shell (701) is symmetrically provided with partitions dividing gas chambers, the threaded interface (7011) is installed at the bottom of the shell (701) and communicates with the gas chamber, and the threaded interface (7011) is threadedly connected with the threaded connector (403), the two mirrors (703) are respectively installed on the opposite sides of the two partitions, the laser (702) and the photodetector (704) are installed on the side wall close to the two ends of one of the partitions, and the laser beam emitted by the laser (702) is received by the photodetector (704) after multiple times of back-and-forth reflection through the two mirrors (703).

5. A smart vent for natural gas as defined in claim 3, wherein, The support frame (500) comprises a mounting ring (501), telescopic legs (502), connecting rods (503) and sliding members (504), the mounting ring (501) is fixedly sleeved on the outer pipe wall of the third steel pipe (402), the three telescopic legs (502) are uniformly distributed along the circumference of the mounting ring (501) and are hingedly connected with the mounting ring (501), the sliding member (504) is movably sleeved on the outer pipe wall of the third steel pipe (402), and one end of the connecting rod (503) is hingedly connected with the side wall of the telescopic leg (502), and the other end of the connecting rod (503) is hingedly connected with the side wall of the sliding member (504).

6. A smart vent for natural gas as defined in claim 4, wherein, The monitoring mechanism (700) further comprises a display screen (705), a microprocessor (706), a battery pack (707), a remote transmission antenna (708) and a warning indicator light (709), the display screen (705) is inlaidly installed on the side wall of the shell (701), the microprocessor (706) and the battery pack (707) are both installed on the inner side wall of the shell (701), the remote transmission antenna (708) and the warning indicator light (709) are both installed on the top of the shell (701), and the top of the shell (701) is further provided with a diffusion port (7012) communicating with the gas chamber.

7. A smart vent for natural gas as defined in claim 2, wherein, The bypass pipe (600) comprises a branch pipe (601), a pressure gauge (602) and a nitrogen injection port (604) provided with a nitrogen injection valve (603), the branch pipe (601) is communicatively arranged on the side wall of the first steel pipe (202) close to the top end, and the end of the branch pipe (601) away from the first steel pipe (202) is in a closed structure, the nitrogen injection port (604) is communicatively arranged on the top of the end of the branch pipe (601) away from the first steel pipe (202), the nitrogen injection valve (603) is installed on the nitrogen injection port (604), and the pressure gauge (602) is installed on the branch pipe (601) and located between the first steel pipe (202) and the branch pipe (601).

8. A smart vent for natural gas as defined in claim 4, wherein, The air leakage detection mechanism (800) comprises a liquid storage shell (801), a piston (802), a communication member (803), an elastic extrusion member (804) and a detection shell (805), the liquid storage shell (801) and the detection shell (805) are sleeved on the outer pipe wall of the third steel pipe (402) near the top end, the detection shell (805) is located above the liquid storage shell (801), the piston (802) is installed in the liquid storage shell (801), the piston (802) is in sliding fit with the third steel pipe (402), the communication member (803) is installed between the piston (802) and the detection shell (805), the elastic extrusion member (804) is installed on the piston (802), when the threaded interface (7011) is screwed with the threaded joint (403), the piston (802) is compressed to slide downward by the elastic extrusion member (804), and the liquid in the liquid storage shell (801) enters the detection shell (805) through the communication member (803).

9. A smart vent for natural gas according to claim 8, wherein, The elastic extrusion member (804) comprises a sliding rod (8041) and a spring (8042), the sliding rod (8041) is installed on the top of the piston (802), the top end of the sliding rod (8041) is in sliding penetration through the top edge of the liquid storage shell (801) and extends upward, the spring (8042) is installed between the piston (802) and the top edge of the liquid storage shell (801), and the spring (8042) is sleeved on the sliding rod (8041), and the outer side of the threaded interface (7011) is fixedly sleeved with a pressing ring (900) for extruding the sliding rod (8041).

10. A smart vent for natural gas as defined in claim 8, wherein, The communication member (803) comprises a fixed pipe (8031) and a hose (8032), the fixed pipe (8031) penetrates through the piston (802), and the top end of the fixed pipe (8031) is communicated with the hose (8032), and one end, away from the fixed pipe (8031), of the hose (8032) is connected with the bottom of the liquid storage shell (801).

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