Safety protection device for detecting gas leakage of petroleum and natural gas pipeline

Abstract

The invention relates to the technical field of pipeline safety protection, in particular to a safety protection device for detecting gas leakage of a petroleum and natural gas pipeline, which comprises a traction bin, the rear end of the traction bin is connected with a plurality of traction cylinders connected end to end, and the outer sides of the traction cylinders are sleeved with detection protection cylinders; an air pump assembly is installed in the traction bin, a traction force regulation and control assembly is installed on the traction bin, and a clutch assembly and a detection protection assembly are arranged between the traction cylinder and the detection protection cylinder. The device can adapt to petroleum and natural gas pipelines at various installation positions, can smoothly move in the pipeline whether a buried pipeline or a high-altitude erected pipeline, continuously detects whether the pipeline leaks gas or not in the moving process, improves the detection efficiency, can be separated from the detection protection barrel through the traction barrel, and is convenient to use. The detection protection cylinder can accurately stay at the leakage position and prevent leakage, the leakage duration time and the leakage amount are greatly reduced, the pipeline safety can be guaranteed, and accident losses can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline safety protection, and particularly relates to a safety protection device for detecting air leakage in oil and gas pipelines. Background Art

[0002] As important energy resources, oil and gas are widely used in industrial production and daily life, and their transportation mainly relies on pipeline systems. Since oil and gas are flammable and explosive, once there is air leakage in the pipeline, the leaked gas diffuses in the air and is extremely likely to cause violent explosions and large-scale fires when encountering fire sources such as open flames and electric sparks. It will also pollute the soil and groundwater, disrupt the ecological balance, and cause serious impacts on the living environments of animals and plants. At the same time, it also increases the energy production and transportation costs and reduces the energy utilization efficiency.

[0003] Therefore, it is extremely important to check for air leakage in oil and gas pipelines. However, the installation locations of oil and gas pipelines are diverse. Some pipelines are buried underground, while some are erected above the ground. The existing detection and protection devices on the current market cannot well adapt to this complex pipeline layout. For buried pipelines, due to their deep burial underground, conventional detection means are difficult to directly reach. The traditional manual inspection method is not only inefficient but also unable to detect tiny air leakage points in a timely manner. For pipelines installed above the ground, due to the height and the environment where the pipelines are located, the inspection work is also extremely difficult, and it is difficult for inspection personnel to approach the pipelines for a comprehensive and detailed inspection. And once air leakage in the pipeline is detected, due to the special location of the pipeline, it is very difficult to quickly take effective measures to stop the leakage.

[0004] Therefore, how to conveniently detect whether there is air leakage in oil and gas pipelines and provide timely protection after detecting air leakage in oil and gas pipelines is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In order to conveniently detect whether there is air leakage in oil and gas pipelines and provide timely protection after detecting air leakage in oil and gas pipelines, the present application provides a safety protection device for detecting air leakage in oil and gas pipelines.

[0006] The safety protection device for detecting air leakage in oil and gas pipelines provided by the present application adopts the following technical solutions: A safety protection device for detecting air leakage in oil and gas pipelines, including a traction chamber. A number of traction cylinders connected end to end are connected to the rear end of the traction chamber. Detection and protection cylinders are sleeved outside the traction cylinders, and ventilation holes are provided on the detection and protection cylinders. An air pump assembly is installed inside the traction chamber, and a traction force regulation assembly is installed on the traction chamber. Clutch assemblies and detection and protection assemblies are provided between the traction cylinders and the detection and protection cylinders. A first valve assembly is hermetically connected between the traction force regulation assembly and the air pump assembly, a second valve assembly is hermetically connected between the clutch assembly and the air pump assembly, and a third valve assembly is hermetically connected between the detection and protection assembly and the air pump assembly. The air pump assembly is electrically connected to a control system, and the detection and protection assembly, the first valve assembly, the second valve assembly, and the third valve assembly are all electrically connected to the control system.

[0007] Further, the air pump assembly includes a cylinder body. A piston body is hermetically and slidably connected inside the cylinder body. A piston rod passing through the cylinder body is fixedly connected to the piston body. A drive pin is fixedly connected to the outer side of the end of the piston rod away from the piston body. A drive sleeve is sleeved on the piston rod. A cylindrical cam groove is provided in the drive sleeve corresponding to the drive pin. The outer side surface of the drive sleeve is drivingly connected to a driving member. A tee pipe is fixedly connected to the cylinder body. The other two ends of the tee pipe are respectively provided with a one-way intake valve and a one-way exhaust valve. The one-way intake valve and the one-way exhaust valve are correspondingly connected to the first valve assembly, the second valve assembly, and the third valve assembly.

[0008] Further, one end of the one-way intake valve away from the tee pipe is hermetically connected to a first pressure stabilizing tank, and one end of the one-way exhaust valve away from the tee pipe is hermetically connected to a second pressure stabilizing tank. The first pressure stabilizing tank and the second pressure stabilizing tank are fixedly installed inside the traction chamber.

[0009] Further, the traction force regulation assembly includes a number of drive plates. The drive plates are rotatably connected to the outer wall surface of the traction chamber in a circumferentially evenly distributed manner. A tapered guide head is slidably connected to the front end of the traction chamber. The rear end of the guide head is provided as a limit ring. The inner side surface of the limit ring is slidably connected to the outer side surface of the drive plate. A first cylinder is fixedly installed inside the traction chamber. The telescopic end of the first cylinder is fixedly connected to the guide head. The first valve assembly is connected between the first cylinder and the air pump assembly.

[0010] Further, the first valve assembly includes a first electric control valve and a second electric control valve. One end of the first electric control valve and the second electric control valve is hermetically connected to the first cylinder. The end of the first electric control valve away from the first cylinder is hermetically connected to the intake end of the air pump assembly, and the end of the second electric control valve away from the first cylinder is hermetically connected to the outlet end of the air pump assembly.

[0011] Further, the clutch assembly includes a second cylinder fixedly installed inside the traction cylinder. The telescopic end of the second cylinder penetrates through the side wall of the traction cylinder. A jack is provided on the inner side surface of the detection and protection cylinder corresponding to the telescopic end of the second cylinder. The telescopic end of the second cylinder is inserted and locked with the detection and protection cylinder through the jack. The second cylinder is connected to the second valve assembly.

[0012] Further, the second valve assembly includes a third electric control valve and a fourth electric control valve. The third electric control valve and the fourth electric control valve are hermetically connected to the second cylinder. The end of the third electric control valve away from the second cylinder is hermetically connected to the intake end of the air pump assembly, and the end of the fourth electric control valve away from the second cylinder is hermetically connected to the outlet end of the air pump assembly.

[0013] Further, the detection and protection assembly includes a first airbag and a second airbag. The first airbag and the second airbag are fixedly and hermetically installed on the detection and protection cylinder. First air flow channels communicating with the first airbag and the second airbag are respectively provided on the detection and protection cylinder. A second air flow channel is provided at a position between the first airbag and the second airbag on the detection and protection cylinder; Communication components are provided between the detection and protection cylinder and the traction cylinder corresponding to the first air flow channel and the second air flow channel. A first connecting pipe is fixedly installed inside the traction cylinder corresponding to the communication component communicating with the first air flow channel. A second connecting pipe is fixedly installed inside the traction cylinder corresponding to the communication component communicating with the second air flow channel. A first pressure sensor is hermetically installed on the first connecting pipe, and a second pressure sensor is hermetically installed on the second connecting pipe. The first connecting pipe and the second connecting pipe are respectively connected to the third valve assembly.

[0014] Further, the third valve assembly includes a fifth electric control valve, a sixth electric control valve and a seventh electric control valve fixedly installed inside the traction cylinder; The fifth electric control valve is hermetically connected to the second connecting pipe, and the fifth electric control valve is hermetically connected to the outlet end of the air pump assembly; The sixth electric control valve and the seventh electric control valve are both hermetically connected to the first connecting pipe. The sixth electric control valve is hermetically connected to the outlet end of the air pump assembly, and the seventh electric control valve is hermetically connected to the intake end of the air pump assembly.

[0015] Further, the connecting component includes a connecting seat. First mounting holes are respectively formed in the traction cylinder corresponding to the first air flow channel and the second air flow channel. The connecting seat is in sealed sliding connection in the first mounting holes. A first through hole is formed in the connecting seat. A first spring is connected in an abutting manner between the connecting seat and the traction cylinder. Second mounting holes respectively communicating with the first air flow channel and the second air flow channel are formed in the detection and protection cylinder corresponding to the connecting seat. A fixed disk and a sliding disk are hermetically connected inside the second mounting holes. Second through holes corresponding to the first through hole are formed in the fixed disk and the sliding disk. A connecting rod passing through the fixed disk is fixedly connected to the sliding disk. A sealing plate corresponding to the second through hole is fixedly connected to one end of the connecting rod away from the sliding disk. A second spring is connected in an abutting manner between the fixed disk and the sliding disk.

[0016] The beneficial effects achieved are as follows: In this application, by hingedly connecting the traction bin with the traction cylinder and between adjacent traction cylinders, it can flexibly adapt to oil and gas pipelines at various installation positions. Whether it is the complex route of buried pipelines or the bending of overhead pipelines, it can move smoothly inside the pipeline, solving the problem that existing devices are difficult to adapt to complex pipeline layouts. At the same time, by means of the gas transported inside the oil and gas pipeline to push the device from the gas source end to the supply end, without additional complex driving equipment, and with the cooperation of the air pump assembly and the detection and protection assembly, continuously detect whether the pipeline leaks during the movement. Compared with traditional manual inspection, the detection efficiency is greatly improved, and tiny leakage points can be found in time, overcoming the problems that conventional detection means are difficult to reach deep-buried underground pipelines and the detection of overhead pipelines is inconvenient. And once a pipeline leak is detected, the device can quickly respond. By adjusting the first valve assembly through the control system, the device immediately stops moving. At the same time, control the second valve assembly to separate the corresponding traction cylinder from the detection and protection cylinder, so that the detection and protection cylinder accurately stays at the leakage point and stops the leakage, greatly reducing the leakage duration and leakage volume, effectively ensuring pipeline safety and reducing possible accident losses. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of this application.

[0018] Figure 2 It is a schematic diagram of the structural decomposition of an embodiment of this application.

[0019] Figure 3 It is a schematic diagram of the first sectional structure of an embodiment of this application.

[0020] Figure 4 It is a schematic diagram of the second sectional structure of an embodiment of this application.

[0021] Figure 5It is a schematic three-dimensional structure diagram of an air pump assembly in an embodiment of the present application.

[0022] Figure 6 is Figure 3 a schematic diagram of the structure of Part Ⅰ in

[0023] Figure 7 is Figure 3 a schematic diagram of the structure of Part Ⅱ in

[0024] Figure 8 is Figure 4 a schematic diagram of the structure of Part Ⅲ in

[0025] Figure 9 is Figure 8 a schematic diagram of the structure of Part Ⅳ in

[0026] Figure 10 It is a schematic hydraulic control principle diagram of an embodiment of the present application.

[0027] Explanation of reference numerals: 100, oil and gas pipeline; 101, traction bin; 102, traction cylinder; 103, detection and protection cylinder; 104, universal joint; 105, ventilation hole; 200, air pump assembly; 201, cylinder block; 202, piston body; 203, piston rod; 204, drive pin; 205, drive sleeve; 206, cylindrical cam groove; 207, drive member; 208, three-way pipe; 209, one-way intake valve; 210, one-way exhaust valve; 211, first pressure stabilizing tank; 212, second pressure stabilizing tank; 213, storage battery; 214, first gear; 215, second gear; 300, traction force regulation assembly; 301, drive plate; 302, guide head; 303, limit ring; 304, first cylinder; 400, clutch assembly; 401, second cylinder; 402, jack; 500, detection and protection assembly; 501, first airbag; 502, second airbag; 503, first air flow channel; 504, second air flow channel; 505, first connecting pipe; 506, second connecting pipe; 507, first pressure sensor; 508, second pressure sensor; 600, first valve assembly; 601, first electric control valve; 602, second electric control valve; 700, second valve assembly; 701, third electric control valve; 702, fourth electric control valve; 800, third valve assembly; 801, fifth electric control valve; 802, sixth electric control valve; 803, seventh electric control valve; 900, connection assembly; 901, connection seat; 902, first mounting hole; 903, first through hole; 904, first spring; 905, second mounting hole; 906, fixed disk; 907, sliding disk; 908, second through hole; 909, connecting rod; 910, sealing plate; 911, second spring. Detailed implementation manners

[0028] The following is combined with the attached Figure 1-10The present application will be further described in detail.

[0029] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0030] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] The embodiment of the present application discloses a safety protection device for detecting air leakage in oil and gas pipelines.

[0032] Please refer to Figures 1 to 10 , in an embodiment of the present application, a safety protection device for detecting air leakage in oil and gas pipelines includes a traction bin 101, the traction bin 101 is slidably connected inside the oil and gas pipeline 100, the rear end of the traction bin 101 is connected with a number of traction cylinders 102 connected end to end, detection and protection cylinders 103 are sleeved outside the traction cylinders 102, the traction bin 101 and the traction cylinders 102 as well as between two adjacent traction cylinders 102 are all hinged and connected by universal joints 104, and a number of ventilation holes 105 penetrating along the axial direction are opened on the detection and protection cylinders 103; an air pump assembly 200 is installed inside the traction bin 101, a traction force regulation assembly 300 is installed on the traction bin 101, and a clutch assembly 400 and a detection and protection assembly 500 are provided between the traction cylinders 102 and the detection and protection cylinders 103; a first valve assembly 600 is hermetically connected between the traction force regulation assembly 300 and the air pump assembly 200, a second valve assembly 700 is hermetically connected between the clutch assembly 400 and the air pump assembly 200, a third valve assembly 800 is hermetically connected between the detection and protection assembly 500 and the air pump assembly 200, the air pump assembly 200 is electrically connected to a control system, and the detection and protection assembly 500, the first valve assembly 600, the second valve assembly 700, and the third valve assembly 800 are all electrically connected to the control system.

[0033] The implementation principle of a safety protection device for detecting gas leakage in a petroleum and natural gas pipeline according to an embodiment of the present application is as follows: The entire device is put into the oil and gas pipeline 100 from the gas source end of the oil and gas pipeline 100, and then the oil and gas transported inside the oil and gas pipeline 100 are used to push the entire device from the gas source end of the oil and gas pipeline 100 to the supply end.

[0034] In the process of pushing the entire device from the gas source end of the oil and gas pipeline 100 to the supply end, the air pump assembly 200 is started, and the control system is used to control the third valve assembly 800 to transport the positive pressure gas output by the air pump assembly 200 to the detection and protection assembly 500 between the traction cylinder 102 farthest from the traction chamber 101 and the detection and protection cylinder 103 for detecting whether there is a leak in the oil and gas pipeline 100.

[0035] When the oil and gas pipeline 100 leaks, the air pressure input to the detection and protection component 500 is increased, and the control system is used to control the first valve component 600 to control the traction force regulating component 300, thereby stopping the entire device from moving. The control system is then used to control the second valve component 700 to control the clutch component 400, so that the traction cylinder 102 farthest from the traction chamber 101 is separated from the detection and protection cylinder 103, and the detection and protection cylinder 103 stays at the leaking part of the oil and gas pipeline 100 to prevent further leakage.

[0036] When there is no leakage in the oil and gas pipeline 100, the control system is used to control the first valve assembly 600 to control the traction force regulation assembly 300, and then the control device as a whole continues to move. At the same time, the detection and protection assembly 500 between the traction cylinder 102 farthest from the traction chamber 101 and the detection and protection cylinder 103 is used to detect whether there is a leakage in the oil and gas pipeline 100 again.

[0037] Please refer to Figures 1 to 10 In one embodiment of the present application, the air pump assembly 200 includes a cylinder body 201, a piston body 202 is sealingly and slidably connected inside the cylinder body 201, a piston rod 203 that passes through the cylinder body 201 is fixedly connected to the piston body 202, a driving pin 204 is fixedly connected to the outer side of the end of the piston rod 203 away from the piston body 202, a driving sleeve 205 is sleeved on the piston rod 203, a cylindrical cam groove 206 is opened inside the driving sleeve 205 corresponding to the driving pin 204, a driving member 207 is transmission-connected to the outer side of the driving sleeve 205, a three-way pipe 208 is fixedly connected to the cylinder body 201, and a one-way air intake valve 209 and a one-way air outlet valve 210 are respectively installed at the other two ends of the three-way pipe 208, and the one-way air intake valve 209 and the one-way air outlet valve 210 are connected to the first valve assembly 600, the second valve assembly 700, and the third valve assembly 800 correspondingly.

[0038] During the working process, the driving member 207 drives the driving sleeve 205 to rotate. As the driving sleeve 205 rotates, the cylindrical cam groove 206 exerts a force on the driving pin 204, causing the piston rod 203 to perform a reciprocating linear motion.

[0039] When the piston rod 203 drives the piston body 202 to move outward in the cylinder block 201, the space inside the cylinder block 201 increases and the air pressure decreases. At this time, the one-way intake valve 209 opens and the one-way exhaust valve 210 closes, and the gas in the first valve assembly 600, the second valve assembly 700 or the third valve assembly 800 can enter the cylinder block 201 through the one-way intake valve 209.

[0040] When the piston rod 203 drives the piston body 202 to move inward in the cylinder block 201, the space inside the cylinder block 201 decreases and the air pressure increases. At this time, the one-way intake valve 209 closes and the one-way exhaust valve 210 opens, and the gas in the cylinder block 201 is discharged through the one-way exhaust valve 210 and is conveyed to the first valve assembly 600, the second valve assembly 700 or the third valve assembly 800 through the tee pipe 208, and then is respectively conveyed to the traction force regulation assembly 300, the clutch assembly 400 or the detection and protection assembly 500 according to the instructions of the control system.

[0041] This design ensures that the gas can only flow in a predetermined direction through the settings of the one-way intake valve 209 and the one-way exhaust valve 210, avoiding the reverse flow of the gas and ensuring the stability and reliability of the air pump assembly. And through the connection with the first valve assembly 600, the second valve assembly 700 and the third valve assembly 800, the gas can be accurately conveyed to the corresponding assemblies according to different working requirements, realizing the precise control of functions such as traction force regulation, clutch action, and air leakage detection and protection.

[0042] Please also refer to Figures 1 to 10 , in a specific embodiment of the present application, the driving member 207 is configured as a motor connected to the control system. A storage battery 213 connected to the motor is fixedly installed on the traction bin 101. A first gear 214 is fixedly installed on the output shaft of the motor, and a second gear 215 is installed on the driving sleeve 205 corresponding to the first gear 214, and the first gear 214 meshes with the second gear 215.

[0043] During operation, the storage battery 213 supplies power to the electric motor connected to the control system. The control system sends start or stop commands to the electric motor according to the operating state of the device, such as whether it is necessary to start the air pump assembly for detection or protection operations. When the electric motor receives the start command, it starts to run, and its output shaft drives the first gear 214 to rotate. Since the first gear 214 meshes with the second gear 215 on the drive sleeve 205, the rotation of the first gear 214 is transmitted to the second gear 215 through gear meshing, thereby driving the drive sleeve 205 to rotate. The suction and exhaust functions of the air pump assembly are realized, providing the required gas power for the detection and protection operations of the device.

[0044] In a specific embodiment of the present application, the storage battery 213 is electrically connected to the control system. The control system includes a controller, a locator, and a mobile terminal. The controller is correspondingly electrically connected to the air pump assembly 200, the detection and protection assembly 500, the first valve assembly 600, the second valve assembly 700, and the third valve assembly 800. The controller is electrically connected to the locator, and the controller and the locator are wirelessly connected to the mobile terminal.

[0045] During operation, the storage battery 213 provides power support for the entire control system and related components. The controller, as the core of the control system, receives instructions from the mobile terminal and feeds back the position information of the locator to the mobile terminal. The mobile terminal can be remotely operated by an operator to send commands such as starting and stopping the device, adjusting the working parameters of the air pump assembly, and controlling each valve assembly according to the detection results. The locator real-time monitors the position of the device in the oil and gas pipeline and transmits the position data to the mobile terminal, so that the subsequent staff can quickly find the leakage point for repair.

[0046] This design ensures that the operator can remotely control the present application through the mobile terminal, breaking through the distance limitation, eliminating the need for on-site operation in the pipeline, improving work efficiency and safety. At the same time, it can obtain the working state and position information of the device in real time, facilitating timely decision-making and adjustment, and enhancing the overall control ability of the oil and gas pipeline detection and protection work.

[0047] Please also refer to Figures 1 to 10 , in an embodiment of the present application, one end of the one-way intake valve 209 away from the tee 208 is hermetically connected to the first pressure stabilizing tank 211, and one end of the one-way exhaust valve 210 away from the tee 208 is hermetically connected to the second pressure stabilizing tank 212. The first pressure stabilizing tank 211 and the second pressure stabilizing tank 212 are fixedly installed inside the towing compartment 101.

[0048] During the working process, the first pressure stabilizing tank 211 ensures stable air source pressure when the air pump assembly 200 sucks air, and the second pressure stabilizing tank 212 ensures stable exhaust pressure, greatly improving the working stability of the air pump assembly 200. The stable air supply and exhaust pressure enable each component that relies on gas pressure to work reliably during the detection and protection processes of the entire safety protection device, such as the detection and protection component 500, the clutch component 400, etc., reducing detection errors or protection action failures caused by unstable pressure.

[0049] Please also refer to Figures 1 to 10 , in an embodiment of the present application, the traction force regulation component 300 includes a plurality of drive plates 301. The drive plates 301 are rotatably connected to the outer wall surface of the traction chamber 101 in a circumferentially uniform distribution. A guiding head 302 is slidably connected to the front end of the traction chamber 101. The front end of the guiding head 302 is tapered, and the rear end of the guiding head 302 is provided with a limiting ring 303. The inner side surface of the limiting ring 303 is slidably connected to the outer side surface of the drive plate 301. A first cylinder 304 is fixedly installed inside the traction chamber 101. The telescopic end of the first cylinder 304 is fixedly connected to the guiding head 302. The first valve assembly 600 is connected between the first cylinder 304 and the air pump assembly 200.

[0050] During the working process, when the air pump assembly 200 works and supplies air to the first cylinder 304 through the first valve assembly 600, the telescopic end of the first cylinder 304 extends. This causes the guiding head 302 to slide forward, and the limiting ring 303 at the rear end of the guiding head 302 also moves forward accordingly. Since the inner side surface of the limiting ring 303 is slidably connected to the outer side surface of the drive plate 301, the restriction on the drive plate 301 will be released during the forward movement of the limiting ring 303, and the drive plate 301 will expand outward around its rotation connection point with the traction chamber 101. The airflow inside the oil and gas pipeline 100 will act on the drive plate 301 and then push the traction chamber 101 forward.

[0051] When the first valve assembly 600 switches the air path to change the flow direction of the gas provided by the air pump assembly 200 to the first cylinder 304, the telescopic end of the first cylinder 304 retracts. The guiding head 302 slides backward, and the limiting ring 303 also moves backward. At this time, the limiting ring 303 will generate a thrust force that contracts inward on the drive plate 301. When the drive plate 301 contracts inward, the thrust force of the airflow inside the oil and gas pipeline 100 acting on the drive plate 301 will decrease, thereby decelerating or stopping the movement of the device.

[0052] When the first valve assembly 600 stops supplying air, the thrust force of the airflow inside the oil and gas pipeline 100 acting on the drive plate 301 will remain stable, thereby enabling the device to move at a constant speed or stop. Through the coordinated operation of the air pump assembly 200, the first valve assembly 600, and the first cylinder 304, this design can precisely control the contact state between the driving plate 301 and the inner wall of the pipeline, and then flexibly adjust the moving speed and start / stop of the device in the pipeline to meet different detection requirements. For example, when detailed detection of a specific area is required, the moving speed can be reduced; when a gas leak is detected and emergency braking is needed, the device can quickly stop moving.

[0053] Please also refer to Figures 1 to 10 , in an embodiment of the present application, the first valve assembly 600 includes a first electric control valve 601 and a second electric control valve 602. One ends of the first electric control valve 601 and the second electric control valve 602 are hermetically connected to the first cylinder 304. The end of the first electric control valve 601 away from the first cylinder 304 is hermetically connected to the intake end of the air pump assembly 200, and the end of the second electric control valve 602 away from the first cylinder 304 is hermetically connected to the outlet end of the air pump assembly 200.

[0054] During the working process, by independently controlling the opening and closing of the first electric control valve 601 and the second electric control valve 602, the air pressure change in the first cylinder 304 can be precisely controlled, and then the expansion or not of the driving plate 301 can be accurately controlled, realizing the precise control of the moving speed and start / stop of the device in the pipeline.

[0055] Please also refer to Figures 1 to 10 , in an embodiment of the present application, the clutch assembly 400 includes a second cylinder 401 fixedly installed inside the traction cylinder 102. The telescopic end of the second cylinder 401 penetrates through the side wall of the traction cylinder 102. A jack 402 is provided on the inner side surface of the detection and protection cylinder 103 corresponding to the telescopic end of the second cylinder 401. The telescopic end of the second cylinder 401 is inserted and locked with the detection and protection cylinder 103 through the jack 402; the second cylinder 401 is connected to the second valve assembly 700.

[0056] During the working process, the air pump assembly 200 supplies air to the second cylinder 401 through the second valve assembly 700. The air pressure in the second cylinder 401 increases, and its telescopic end extends outwards, passes through the side wall of the traction cylinder 102, and inserts into the jack 402 inside the detection and protection cylinder 103, realizing the plug-in locking of the detection and protection cylinder 103 and the traction cylinder 102. At this time, the detection and protection cylinder 103 can move in the pipeline following the traction cylinder 102, and at the same time, the pipeline is normally detected by using the detection and protection assembly 500. When a pipeline air leak is detected, the control system issues a separation command, and the second valve assembly 700 changes the air path to discharge the gas in the second cylinder 401. The air pressure in the second cylinder 401 decreases, and the telescopic end retracts and withdraws from the jack 402 of the detection and protection cylinder 103, and the detection and protection cylinder 103 is separated from the traction cylinder 102. The separated detection and protection cylinder 103 remains at the pipeline air leak location, and uses its own structure and the function of the detection and protection assembly 500 to perform a protection operation on the leak location to prevent natural gas from continuing to leak.

[0057] This design uses a cylinder as the actuator of the clutch assembly 400. Driven by the air pressure provided by the air pump assembly 200 through the second valve assembly 700, it can quickly realize the connection and separation of the detection and protection cylinder 103 and the traction cylinder 102. In the event of an emergency where a pipeline air leak is detected, it can quickly respond and timely leave the detection and protection cylinder 103 at the leak location for protection, effectively reducing the amount of natural gas leakage and lowering the safety risk.

[0058] Please also refer to Figures 1 to 10 In an embodiment of the present application, the second valve assembly 700 includes a third electric control valve 701 and a fourth electric control valve 702. The third electric control valve 701 and the fourth electric control valve 702 are hermetically connected to the second cylinder 401. One end of the third electric control valve 701 away from the second cylinder 401 is hermetically connected to the intake end of the air pump assembly 200, and one end of the fourth electric control valve 702 away from the second cylinder 401 is hermetically connected to the outlet end of the air pump assembly 200.

[0059] During the working process, by independently controlling the opening and closing of the third electric control valve 701 and the fourth electric control valve 702, the air pressure change in the second cylinder 401 can be accurately controlled, and further the separation action of the detection and protection cylinder 103 and the traction cylinder 102 can be accurately controlled. This precise control enables the device to respond in a timely and accurate manner according to the actual detection situation, effectively improving the device's ability to handle pipeline air leak situations.

[0060] Please also refer to Figures 1 to 10, in an embodiment of the present application, the detection and protection component 500 includes a first airbag 501 and a second airbag 502. The first airbag 501 and the second airbag 502 are fixedly and sealingly installed on the outer side of the detection and protection cylinder 103 near its two end portions. The detection and protection cylinder 103 is respectively provided with a first air flow channel 503 communicating with the first airbag 501 and the second airbag 502, and a second air flow channel 504 is provided at a position between the first airbag 501 and the second airbag 502 on the detection and protection cylinder 103; communication components 900 are provided between the detection and protection cylinder 103 and the traction cylinder 102 corresponding to the first air flow channel 503 and the second air flow channel 504. A first connecting pipe 505 is fixedly installed inside the traction cylinder 102 corresponding to the communication component 900 communicating with the first air flow channel 503. The first connecting pipe 505 is hermetically communicated with the first air flow channel 503 through the communication component 900. A second connecting pipe 506 is fixedly installed inside the traction cylinder 102 corresponding to the communication component 900 communicating with the second air flow channel 504. The second connecting pipe 506 is hermetically communicated with the second air flow channel 504 through the communication component 900. A first pressure sensor 507 is sealingly installed on the first connecting pipe 505, and a second pressure sensor 508 is sealingly installed on the second connecting pipe 506. The first connecting pipe 505 and the second connecting pipe 506 are respectively connected to the third valve assembly 800.

[0061] During the working process, the positive pressure gas output by the air pump assembly 200 is introduced into the first airbag 501 and the second airbag 502 on the last detection and protection cylinder 103 from the first connecting pipe 505, the communication component 900 and the first air flow channel 503 on the last traction cylinder 102 and the detection and protection cylinder 103 at a set pressure through the third valve assembly 800, and the first pressure sensor 507 is used to cooperate with detecting the air pressure inside the first airbag 501 and the second airbag 502, so that the first airbag 501 and the second airbag 502 expand to a state where they can slide sealingly inside the oil and gas pipeline 100. A sealed annular cavity will be formed between the outer wall of the detection and protection cylinder 103 and the inner wall of the oil and gas pipeline 100 at the position between the first airbag 501 and the second airbag 502.

[0062] Then, the positive pressure gas output by the air pump assembly 200 is introduced into the annular cavity between the first airbag 501 and the second airbag 502 at a set pressure through the second connecting pipe 506, the communication component 900 and the second air flow channel 504 through the third valve assembly 800, and the second pressure sensor 508 is used to detect the pressure change in the annular cavity. When the pressure in the annular cavity suddenly drops sharply, it indicates that the side wall of the oil and gas pipeline 100 leaks.

[0063] After detecting a leak in the oil and gas pipeline 100, the control system controls the third valve assembly 800 again to reconnect the air pump assembly 200 with the first connecting pipe 505. Then, the positive-pressure gas output by the air pump assembly 200 enters the first airbag 501 and the second airbag 502 again through the first connecting pipe 505, the connecting assembly 900, and the first air flow channel 503. The first pressure sensor 507 is used to detect the air pressure inside the first airbag 501 and the second airbag 502, so that the first airbag 501 and the second airbag 502 expand to a state where they are fixedly supported inside the oil and gas pipeline 100. At the same time, the control system controls the first valve assembly 600 to retract the driving plate 301 in the traction force regulation assembly 300 inward around its rotation connection point with the traction bin 101, and controls the second valve assembly 700 to separate the detection and protection cylinder 103 from the traction cylinder 102. The detection and protection cylinder 103 will stay at the leak of the oil and gas pipeline 100 to prevent further leakage. And in the subsequent detection process, the detection and protection assembly 500 on the last traction cylinder 102 and the detection and protection cylinder 103 will continue the subsequent detection.

[0064] Please refer to Figures 1 to 10 , in an embodiment of the present application, the third valve assembly 800 includes a fifth electric control valve 801, a sixth electric control valve 802, and a seventh electric control valve 803 fixedly installed inside the traction cylinder 102. The fifth electric control valve 801 is hermetically connected to one end of the second connecting pipe 506 away from the connecting assembly 900. One end of the fifth electric control valve 801 away from the second connecting pipe 506 is hermetically connected to the air outlet end of the air pump assembly 200; both the sixth electric control valve 802 and the seventh electric control valve 803 are hermetically connected to one end of the first connecting pipe 505 away from the connecting assembly 900. One end of the sixth electric control valve 802 away from the first connecting pipe 505 is hermetically connected to the air outlet end of the air pump assembly 200, and one end of the seventh electric control valve 803 away from the first connecting pipe 505 is hermetically connected to the air inlet end of the air pump assembly 200.

[0065] During the working process, when it is necessary to detect whether the pipeline is leaking, first, the control system controls the fifth electromagnetic control valve 801 and the sixth electromagnetic control valve 802 to open and the seventh electromagnetic control valve 803 to close. Thus, the positive-pressure gas output by the air pump assembly 200 is input into the first airbag 501, the second airbag 502, and the annular cavity between the first airbag 501 and the second airbag 502. When the pressure in the first airbag 501, the second airbag 502, and the annular cavity between the first airbag 501 and the second airbag 502 reaches the set value (causing the first airbag 501 and the second airbag 502 to expand to a state where they can slide sealingly inside the oil and gas pipeline 100), then control the fifth electromagnetic control valve 801, the sixth electromagnetic control valve 802, and the seventh electromagnetic control valve 803 to all close. By opening the seventh electromagnetic control valve 803, the air pressure in the first airbag 501 and the second airbag 502 can be reduced, so as to accurately adjust the pressure in the first airbag 501, the second airbag 502, and the annular cavity between the first airbag 501 and the second airbag 502 to the set value.

[0066] When it is detected that the pipeline is leaking, the control system controls the fifth electromagnetic control valve 801 to close and the sixth electromagnetic control valve 802 to open. The pressure in the first airbag 501 and the second airbag 502 is increased to the set value (causing the first airbag 501 and the second airbag 502 to expand to a state where they are fixedly supported inside the oil and gas pipeline 100), and then control the fifth electromagnetic control valve 801, the sixth electromagnetic control valve 802, and the seventh electromagnetic control valve 803 to all close, thereby preventing the positive-pressure gas output by the air pump assembly 200 from leaking in the oil and gas pipeline 100.

[0067] Please also refer to Figures 1 to 10 In an embodiment of the present application, the connection assembly 900 includes a connection seat 901. Corresponding to the first air flow channel 503 and the second air flow channel 504 on the traction cylinder 102, first mounting holes 902 communicating with the first connecting pipe 505 and the second connecting pipe 506 respectively are provided. The connection seat 901 is sealingly and slidably connected in the first mounting hole 902 on the traction cylinder 102. A first through hole 903 is provided on the connection seat 901. A first spring 904 is connected in a butt joint manner between one end of the connection seat 901 located inside the first mounting hole 902 and the traction cylinder 102; corresponding to the connection seat 901 on the detection protection cylinder 103, second mounting holes 905 communicating with the first air flow channel 503 and the second air flow channel 504 respectively are provided. A fixed disk 906 and a sliding disk 907 are sealingly connected inside the second mounting hole 905. Corresponding to the first through hole 903 on the fixed disk 906 and the sliding disk 907, a second through hole 908 is provided. A connecting rod 909 penetrating through the fixed disk 906 is fixedly connected to the sliding disk 907. One end of the connecting rod 909 away from the sliding disk 907 is fixedly connected with a sealing plate 910 corresponding to the second through hole 908. A second spring 911 is connected in a butt joint manner between the fixed disk 906 and the sliding disk 907.

[0068] During the working process, when it is detected that the detection protection cylinder 103 and the traction cylinder 102 are in a connected state, under the action of the first spring 904, the connecting seat 901 slides towards the detection protection cylinder 103 and inserts into the second mounting hole 905. The first through hole 903 on the connecting seat 901 is aligned with the second through hole 908 on the fixed disk 906 and the sliding disk 907.

[0069] At this time, the gas generated by the air pump assembly 200 or the gas in the pipeline can enter the first mounting hole 902 through the first connecting pipe 505 or the second connecting pipe 506, and then pass through the first through hole 903 of the connecting seat 901, the second through holes 908 of the fixed disk 906 and the sliding disk 907, and finally enter the first air flow channel 503 or the second air flow channel 504, thereby realizing the connection of the air path and providing a gas channel for the normal operation of the detection protection assembly 500.

[0070] When the clutch assembly 400 separates the detection protection cylinder 103 from the traction cylinder 102, the connecting seat 901 moves with the traction cylinder 102 and gradually withdraws from the second mounting hole 905. During the process of the connecting seat 901 withdrawing, the sealing plate 910 moves with the sliding disk 907 under the action of the second spring 911, and finally the sealing plate 910 blocks the second through hole 908. In this way, after the detection protection cylinder 103 is separated from the traction cylinder 102, the second mounting hole 905 is sealed, preventing the compressed gas in the first airbag 501 and the second airbag 502 from leaking from the second mounting hole 905 of the detection protection cylinder 103, and ensuring the protection effect when the detection protection cylinder 103 remains at the air leakage point.

[0071] This design can ensure reliable connection between the first connecting pipe 505, the second connecting pipe 506 and the first air flow channel 503, the second air flow channel 504 respectively when the detection protection cylinder 103 is connected to the traction cylinder 102, ensuring that the gas generated by the air pump assembly 200 can be smoothly transported to the detection protection assembly 500, enabling the detection and protection functions to be realized normally. When the detection protection cylinder 103 is separated from the traction cylinder 102, the connecting component 900 can automatically achieve sealing, preventing the pressure in the first airbag 501 and the second airbag 502 from leaking, and further ensuring that the detection protection cylinder 103 can be stably and reliably blocked at the leakage point of the oil and gas pipeline 100. This automatic sealing function does not require additional operation or control, improving the safety and reliability of the device when dealing with pipeline air leakage, and reducing the harm of natural gas leakage to the environment and personnel.

[0072] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A safety protection device for detecting gas leakage in oil and natural gas pipelines, characterized by: The invention comprises a traction chamber (101), wherein the rear end of the traction chamber (101) is connected to a plurality of traction cylinders (102) connected end to end, the outer sides of the traction cylinders (102) are each sleeved with a detection protection cylinder (103), and the detection protection cylinder (103) is provided with a vent hole (105); an air pump assembly (200) is installed inside the traction chamber (101), a traction force control assembly (300) is installed on the traction chamber (101), and a clutch assembly (400) and a detection protection assembly (500) are each provided between the traction cylinder (102) and the detection protection cylinder (103); the traction force control assembly (200) is installed inside the traction chamber (101), and a traction force control assembly (300) is installed on the traction chamber (101); a clutch assembly (400) and a detection protection assembly (500) are provided between the traction cylinder (102) and the detection protection cylinder (103); the traction force control assembly (200) is installed inside the traction chamber (101), and the detection protection assembly (500) is installed ...). A first valve assembly (600) is sealedly connected between the clutch assembly (300) and the air pump assembly (200), a second valve assembly (700) is sealedly connected between the clutch assembly (400) and the air pump assembly (200), and a third valve assembly (800) is sealedly connected between the detection and protection assembly (500) and the air pump assembly (200); the air pump assembly (200) is electrically connected to a control system, and the detection and protection assembly (500), the first valve assembly (600), the second valve assembly (700) and the third valve assembly (800) are all electrically connected to the control system.

2. A safety protection device for detecting gas leakage in oil and natural gas pipelines according to claim 1, characterized in that: The air pump assembly (200) comprises a cylinder body (201), the cylinder body (201) is sealed and slidably connected to a piston body (202), the piston body (202) is fixedly connected to a piston rod (203) that passes through the cylinder body (201), an end of the piston rod (203) away from the piston body (202) is fixedly connected to the outside of a driving pin (204), the piston rod (203) is sleeved with a driving sleeve (205), and the driving sleeve (205) has an opening corresponding to the driving pin (204) inside. A cylindrical cam groove (206) is provided, the outer side surface of the driving sleeve (205) is drivingly connected to a driving member (207), a three-way pipe (208) is fixedly connected to the cylinder body (201), and a one-way air intake valve (209) and a one-way air outlet valve (210) are respectively installed at the other two ends of the three-way pipe (208), and the one-way air intake valve (209) and the one-way air outlet valve (210) are connected to the first valve assembly (600), the second valve assembly (700), and the third valve assembly (800) respectively.

3. A safety protection device for detecting gas leakage in oil and natural gas pipelines according to claim 2, characterized in that: One end of the one-way air inlet valve (209) away from the three-way pipe (208) is sealedly connected to a first pressure-stabilizing tank (211), and one end of the one-way air outlet valve (210) away from the three-way pipe (208) is sealedly connected to a second pressure-stabilizing tank (212); the first pressure-stabilizing tank (211) and the second pressure-stabilizing tank (212) are fixedly mounted inside the traction cabin (101).

4. A safety protection device for detecting gas leakage in oil and natural gas pipelines according to claim 1, characterized in that: The traction force regulating assembly (300) comprises a plurality of driving plates (301), the driving plates (301) being rotatably connected to the outer wall surface of the traction chamber (101) in an annular uniform distribution, the front end of the traction chamber (101) being slidably connected to a conical guide head (302), the rear end of the guide head (302) being arranged as a limit ring (303), the inner side surface of the limit ring (303) being slidably connected to the outer side surface of the driving plate (301), a first cylinder (304) being fixedly installed inside the traction chamber (101), the telescopic end of the first cylinder (304) being fixedly connected to the guide head (302), and the first valve assembly (600) being connected between the first cylinder (304) and the air pump assembly (200).

5. A safety protection device for detecting gas leakage in oil and gas pipelines according to claim 4, characterized in that: The first valve assembly (600) comprises a first electrically controlled valve (601) and a second electrically controlled valve (602), one end of the first electrically controlled valve (601) and the second electrically controlled valve (602) being sealedly connected to the first cylinder (304), one end of the first electrically controlled valve (601) away from the first cylinder (304) being sealedly connected to the air inlet end of the air pump assembly (200), and one end of the second electrically controlled valve (602) away from the first cylinder (304) being sealedly connected to the air outlet end of the air pump assembly (200).

6. A safety protection device for detecting gas leakage in oil and natural gas pipelines according to claim 1, characterized in that: The clutch assembly (400) comprises a second cylinder (401) fixedly mounted inside the traction cylinder (102); the telescopic end of the second cylinder (401) penetrates the side wall of the traction cylinder (102); an insertion hole (402) is provided on the inner side surface of the detection protection cylinder (103) corresponding to the telescopic end of the second cylinder (401); the telescopic end of the second cylinder (401) is plugged and locked with the detection protection cylinder (103) via the insertion hole (402); and the second cylinder (401) is connected to the second valve assembly (700).

7. A safety protection device for detecting gas leakage in oil and gas pipelines according to claim 6, characterized in that: The second valve assembly (700) comprises a third electrically controlled valve (701) and a fourth electrically controlled valve (702), wherein the third electrically controlled valve (701) and the fourth electrically controlled valve (702) are sealedly connected to the second cylinder (401), wherein one end of the third electrically controlled valve (701) away from the second cylinder (401) is sealedly connected to the air inlet end of the air pump assembly (200), and one end of the fourth electrically controlled valve (702) away from the second cylinder (401) is sealedly connected to the air outlet end of the air pump assembly (200).

8. The safety protection device for detecting gas leakage in petroleum and natural gas pipelines according to claim 1 is characterized by: The detection protection assembly (500) comprises a first airbag (501) and a second airbag (502), wherein the first airbag (501) and the second airbag (502) are fixedly and sealedly mounted on the detection protection cylinder (103), wherein the detection protection cylinder (103) is provided with a first airflow channel (503) connected to the first airbag (501) and the second airbag (502), respectively, and the detection protection cylinder (103) is provided with a second airflow channel (504) at a position between the first airbag (501) and the second airbag (502); the first airflow channel (503) and the second airflow channel (504) are provided between the detection protection cylinder (103) and the traction cylinder (102) (504) are provided with a connecting component (900), a first connecting pipe (505) is fixedly installed inside the traction cylinder (102) corresponding to the connecting component (900) connected to the first air flow channel (503), and a second connecting pipe (506) is fixedly installed inside the traction cylinder (102) corresponding to the connecting component (900) connected to the second air flow channel (504), a first pressure sensor (507) is sealed on the first connecting pipe (505), and a second pressure sensor (508) is sealed on the second connecting pipe (506), and the first connecting pipe (505) and the second connecting pipe (506) are respectively connected to the third valve component (800).

9. A safety protection device for detecting gas leakage in oil and natural gas pipelines according to claim 8, characterized in that: The third valve assembly (800) comprises a fifth electrically controlled valve (801), a sixth electrically controlled valve (802) and a seventh electrically controlled valve (803) fixedly mounted inside the traction cylinder (102); the fifth electrically controlled valve (801) is sealedly connected to the second connecting pipe (506), and the fifth electrically controlled valve (801) is sealedly connected to the air outlet end of the air pump assembly (200); the sixth electrically controlled valve (802) and the seventh electrically controlled valve (803) are both sealedly connected to the first connecting pipe (505), the sixth electrically controlled valve (802) is sealedly connected to the air outlet end of the air pump assembly (200), and the seventh electrically controlled valve (803) is sealedly connected to the air inlet end of the air pump assembly (200).

10. A safety protection device for detecting gas leakage in oil and natural gas pipelines according to claim 8, characterized in that: The connecting component (900) comprises a connecting seat (901), the traction cylinder (102) is provided with first mounting holes (902) corresponding to the first airflow channel (503) and the second airflow channel (504), the connecting seat (901) is sealingly and slidably connected in the first mounting hole (902), the connecting seat (901) is provided with a first through hole (903), and a first spring (904) is abutted and connected between the connecting seat (901) and the traction cylinder (102); the detection protection cylinder (103) is provided with springs (904) corresponding to the connecting seat (901) and connected to the first airflow channel (503) and the second airflow channel (504) respectively. ) is connected to the second mounting hole (905), the second mounting hole (905) is sealedly connected to a fixed disk (906) and a sliding disk (907) inside, the fixed disk (906) and the sliding disk (907) are provided with second through holes (908) corresponding to the first through holes (903), the sliding disk (907) is fixedly connected to a connecting rod (909) passing through the fixed disk (906), the connecting rod (909) is fixedly connected to one end away from the sliding disk (907) and is connected to a sealing plate (910) corresponding to the second through hole (908), and a second spring (911) is abutted between the fixed disk (906) and the sliding disk (907).

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