Magnetic type pipeline intelligent plugging device and system and pipeline under-pressure repairing and replacing method

Abstract

The invention relates to a magnetic type pipeline intelligent plugging device and system and a method for repairing and replacing a pipeline under pressure, and belongs to the field of pipeline maintenance. A magnetic suction type intelligent pipeline plugging device comprises a magnetic suction joint, a sealing joint, a sealing joint and a sealing joint, and the magnetic suction joint is provided with a drainage hole capable of being opened or closed; a connecting joint; the plugging joint is used for moving in the pipeline; the magnetic part can magnetically attract and position the magnetic attraction section; and the plugging air bag assembly is arranged on the plugging joint. A discharge hole capable of being opened or closed is formed in the magnetic adsorption joint and forms position linkage with the magnetic piece, and medium discharge, pressure relief and speed reduction are achieved. A plugging air bag assembly is arranged on the plugging joint, and after the device completes magnetic attraction positioning and stable stopping, the plugging air bag assembly can expand to plug the pipeline.

Description

Technical Field

[0001] This invention relates to the field of pipeline maintenance, and in particular to a magnetic intelligent pipeline sealing device, system, and method for live pipeline repair and replacement. Background Technology

[0002] Long-distance pipelines often require pipe breaks during their service life due to severe corrosion, deformation, and other defects, in order to carry out subsequent pipe section replacement, equipment installation, distribution modification, and other major maintenance operations.

[0003] In this case, the following steps are required: ① Weld bypass branch pipes to both sides of the pipe section to be repaired, allowing the medium to temporarily flow through the bypass branch pipes. The size of the bypass branch pipes should be adjusted according to the pipeline operation. If the flow rate can be reduced during pipeline repair, the bypass branch pipes can be smaller; ② Then, perform pressurized plugging operations at both ends of the pipe section to be repaired. Drill holes in the pipeline and insert plugs or plugging bladders into the holes to block the flow of the medium. Since the plugs or plugging bladders are large, the required plugging holes are also large; ③ Cut off the defective pipeline and weld a new pipeline; ④ Cut off the bypass branch pipes, re-corrode and backfill.

[0004] This will leave two large pressurized sealing caps permanently on the pipeline.

[0005] Existing pipeline pressurized plugging technology requires leaving two large pressurized plugging caps permanently on the pipeline. These caps protrude from the pipeline body, making corrosion prevention difficult and increasing the likelihood of subsequent damage to the anti-corrosion layer compared to the pipeline body. If defects such as corrosion or mechanical damage occur at the caps, internal inspection cannot detect them.

[0006] This poses a significant hidden danger to the pipeline. Summary of the Invention

[0007] Therefore, it is necessary to provide a magnetic intelligent pipe sealing device, system, and pipe repair and replacement method for pipes under pressure, addressing the problem that defects such as corrosion and mechanical damage to pressurized sealing caps cannot be detected by internal inspection.

[0008] A magnetic pipe sealing device includes: A magnetic adsorption joint, wherein the magnetic adsorption joint is provided with a drain hole that can be opened or closed, and the magnetic adsorption joint is used to move within a pipe; A connecting joint, one end of which is connected to the magnetic adsorption joint; A sealing section is connected to the end of the connecting section away from the magnetic adsorption section, and the sealing section is used to move within the pipeline; A magnetic component is provided, which is capable of magnetically attracting and positioning the magnetic adsorption joint. The magnetic adsorption joint has at least a first position and a second position. The first position is away from the magnetic component, and the second position is adjacent to the magnetic component. When the magnetic adsorption joint is located in the first position, the drain hole is closed. When the magnetic adsorption joint moves from the first position to the second position, the drain hole of the magnetic adsorption joint is opened. The magnetic component is used to be disposed outside the pipe. A suffocating airbag assembly, wherein the suffocating airbag assembly is disposed on the suffocating section.

[0009] The magnetic pipe intelligent sealing device disclosed in this application adopts a three-section separate design consisting of a magnetic adsorption section, a connecting section, and a sealing section. Each part has a clear function and a simple structure, which facilitates processing, assembly, and subsequent maintenance and replacement. It also ensures that the device as a whole has sufficient structural strength and coaxiality, making the device move more smoothly in the pipeline and reducing problems such as jamming and deflection.

[0010] By cooperating with magnetic components set on the outside of the pipeline and magnetic adsorption joints inside the pipeline, non-contact magnetic positioning is achieved. There is no need to set up complex positioning, power supply and communication structures inside the pipeline. It is not affected by the signal shielding of the pipeline metal wall. The positioning response is fast and the position is accurate. It is suitable for various pipeline working conditions such as buried, long distance, and closed.

[0011] The magnetic adsorption joint is equipped with an openable and closable vent hole, which is linked to the magnetic component in position: when the magnetic adsorption joint is in the first position away from the magnetic component, the vent hole remains closed, and the device can move stably forward under the propulsion of the medium in the pipeline; when the magnetic adsorption joint moves from the first position to the second position closer to the magnetic component, the vent hole automatically opens, realizing medium venting, pressure relief and deceleration, allowing the device to smoothly stop at the target sealing position, achieving automatic stopping. The control logic is simple and the operation is reliable. The sealing joint is equipped with a sealing airbag assembly. After the device completes magnetic positioning and stable stopping, the sealing airbag assembly can inflate to seal the pipeline. This integrates magnetic positioning, automatic deceleration, and medium sealing functions into one unit, realizing integrated and intelligent pipeline pressurized sealing operations, significantly improving the efficiency and safety of sealing operations.

[0012] In one embodiment, the sealing section includes an installation cylinder, a positioning component, and a first outer ring sealing component. The positioning component is disposed on the installation cylinder and has at least a retracted state and a positioning state. The first outer ring sealing component is sleeved on the installation cylinder. The installation cylinder is connected to the end of the connecting section away from the magnetic adsorption section. The sealing airbag component is disposed on the sealing section.

[0013] The sealing joint uses a modular combination of the installation cylinder, positioning components, and the first outer ring sealing components. The structure has a clear division of labor and is easy to assemble. This facilitates the individual processing, testing, maintenance, and replacement of each component, while ensuring the compactness and stability of the overall structure of the sealing joint, making it suitable for the narrow working space inside the pipeline.

[0014] As the core load-bearing component of the sealing section, the mounting cylinder achieves a reliable connection with the end of the connecting section away from the magnetic adsorption section, ensuring the coaxiality and connection rigidity of the sealing section and the entire device, and ensuring the stability of the sealing section's posture when the device moves in the pipeline, avoiding skewing. On the other hand, it provides a stable installation benchmark for the positioning component, the first outer ring sealing component, and the sealing airbag component, ensuring the accurate installation position of each component and avoiding the impact of installation deviation on the operation effect.

[0015] The positioning component is mounted on the mounting cylinder and features a switchable design for both a retracted and a positioned state, adapting to the needs of different operational stages of the device: When the device moves within the pipeline, the positioning component is in the retracted state, not protruding from the outer periphery of the mounting cylinder, reducing friction and obstruction with the inner wall of the pipeline and ensuring smooth movement of the device; when the device reaches the target sealing position, the positioning component switches to the positioned state, firmly adhering to the inner wall of the pipeline for rigid anchoring, stably fixing the sealing section and the entire device in the sealing position, counteracting the high-pressure thrust and impact force of the medium inside the pipeline, providing reliable positional assurance for the expansion and sealing of the sealing airbag assembly, and preventing sealing failure due to device displacement.

[0016] The first outer ring sealing component is fitted onto the mounting cylinder. After the positioning component completes its positioning, it forms a preliminary seal with the inner wall of the pipe, filling the tiny gap between the mounting cylinder and the inner wall of the pipe, reducing media leakage from the gap, laying the foundation for the expansion and sealing of the sealing airbag component, and improving the overall sealing effect.

[0017] In one embodiment, the positioning assembly includes a wedge-shaped retaining ring, a push motor, and slips. A guide rod is provided on the mounting cylinder, the wedge-shaped retaining ring is slidably disposed on the guide rod, the push motor is disposed on the wedge-shaped retaining ring and the end of the push motor away from the wedge-shaped retaining ring abuts against the mounting cylinder, and there are multiple slips movably disposed on the wedge-shaped retaining ring. The multiple slips are arranged sequentially at intervals along the circumference of the wedge-shaped retaining ring, the multiple slips are located on the side of the wedge-shaped retaining ring away from the push motor, and the end of the multiple slips away from the push motor abuts against the mounting cylinder.

[0018] The positioning component adopts a mechanical transmission structure with wedge-shaped retaining rings, a jacking motor, and slips. The transmission is reliable and the force is large, which can provide a stable and reliable pipe wall anchoring force for the device, ensuring that it does not shift under the pressure impact of the pipeline medium.

[0019] The wedge-shaped retaining ring is slidably mounted on the guide rod, ensuring precise movement trajectory and stable guidance. This effectively prevents the wedge-shaped retaining ring from deviating or jamming during movement, guaranteeing smooth and reliable positioning.

[0020] The push motor directly drives the wedge-shaped retaining ring to move axially. The driving method is simple and responsive, and it can accurately control the extension and retraction of the retaining clip, realizing a quick switch between the storage state and the positioning state.

[0021] Multiple slips are arranged at intervals along the circumference. Under the push of the wedge-shaped retaining ring, they can be pushed outward simultaneously to form multi-point uniform contact support with the inner wall of the pipe, resulting in balanced anchoring force and firm and stable positioning.

[0022] One end of the slip abuts against the mounting cylinder, providing stable support. Under the pushing action of the jacking motor, the axial thrust is efficiently converted into the radial clamping force of the slip, resulting in high transmission efficiency and reliable positioning.

[0023] In one embodiment, the latch is a magnetic element that is attached to the wedge-shaped retaining ring.

[0024] By setting the slip as a magnetic component and adhering it to the wedge-shaped retaining ring, a reliable fit between the slip and the wedge-shaped retaining ring can be achieved without additional hinges, pins, or elastic reset structures. This simplifies the installation and reset structure of the slip, reduces assembly complexity, and minimizes potential failure points.

[0025] The device relies on magnetic attraction to achieve pre-positioning of the slips and wedge-shaped retaining rings. When the device is moving or not in operation, the slips can be stably kept in the storage position, and are not easy to loosen, shake or cause accidental friction with the inner wall of the pipe, thus improving the stability of the device when it runs in the pipe.

[0026] During the positioning process, the latch moves synchronously with the wedge-shaped retaining ring under the magnetic attraction, ensuring smooth and consistent movement of the latch, avoiding jamming, misalignment or stuckness, and improving the reliability and stability of the positioning component's operation.

[0027] The magnetic coupling structure facilitates the disassembly, replacement, and maintenance of the slips, achieving a reliable connection without the need for complex fasteners. This is beneficial for later maintenance and component replacement, improving the overall maintainability and service life of the device.

[0028] In one embodiment, the mounting cylinder is provided with a first annular groove, the positioning component is located at the first annular groove, the first annular groove surrounds the mounting cylinder and is located outside the mounting cylinder, the guide rod is located on one side wall of the first annular groove, the side of the push motor away from the wedge-shaped retaining ring abuts against the side wall where the guide rod is provided, and the retaining clip abuts against the other side wall of the first annular groove.

[0029] A first annular groove is provided around the outside of the mounting cylinder, providing a dedicated mounting space for the positioning components.

[0030] The guide rod is located on one side wall of the first annular groove, providing stable and precise sliding guidance for the wedge-shaped retaining ring, limiting its radial offset and circumferential rotation, and ensuring smooth and reliable axial movement.

[0031] The side of the jacking motor away from the wedge-shaped retaining ring abuts against the side wall of the first annular groove where a guide rod is provided, forming a stable axial support. This allows the thrust of the jacking motor to act on the wedge-shaped retaining ring efficiently and directly, resulting in high power transmission efficiency and a reasonable stress distribution structure.

[0032] The slip abuts against the other side wall of the first annular groove, forming a reliable support and limiting structure. During the pushing and wedge transmission process, the slip's movement trajectory is stable and its radial extension is uniform, ensuring reliable positioning support.

[0033] The first annular groove integrates the positioning components into the wall area of ​​the mounting cylinder, resulting in a compact structure, high space utilization, and no additional increase in the overall outer diameter of the device. This facilitates adaptation to pipes with different inner diameters, improving the device's versatility and operational stability.

[0034] In one embodiment, the mounting cylinder is further provided with a second annular groove and a third annular groove, the second annular groove and the third annular groove surrounding the mounting cylinder and located outside the mounting cylinder, the positioning component being located between the second annular groove and the third annular groove, and the first outer ring sealing component including a first sealing plate component and a second sealing plate component, the first sealing plate component and the second sealing plate component surrounding the mounting cylinder and the first sealing plate component and the second sealing plate component being located at the second annular groove and the third annular groove, respectively.

[0035] A second and a third annular groove are provided on the outside of the mounting cylinder, and the two annular grooves are used to install the first sealing plate assembly and the second sealing plate assembly, respectively. The installation position is clear and the assembly accuracy is high, which can effectively prevent the first outer ring sealing assembly from axially moving during operation and ensure that the sealing position is stable and reliable.

[0036] The positioning component is arranged between the second and third annular grooves, so that the first sealing plate assembly, the positioning component, and the second sealing plate assembly are arranged sequentially and orderly along the axial direction of the mounting cylinder. The structure is compact and reasonable, with high space utilization, without increasing the overall size of the device, and it is easy to move smoothly in the pipeline.

[0037] The first sealing plate assembly and the second sealing plate assembly are located on both sides of the positioning assembly, forming a front and rear double sealing structure. This structure can provide double protection for the pipeline medium after the device is positioned, significantly improving the overall sealing effect and reducing the risk of leakage.

[0038] The two sealing components are installed in independent annular grooves respectively, which ensure uniform force distribution and stable fit. This protects the positioning components, reduces the impact of media erosion and impurity wear on the positioning components, and improves the working stability and service life of the positioning components.

[0039] The combination structure of the ring groove and sealing plate assembly is simple, and the installation and replacement are convenient. This facilitates the processing and manufacturing of the device, on-site maintenance and component replacement, and improves the overall practicality and versatility of the device.

[0040] In one embodiment, the mounting cylinder is further provided with a fourth annular groove, the fourth annular groove surrounding the mounting cylinder and located outside the mounting cylinder, and the first outer ring sealing assembly includes a sealing ring sleeve, the sealing ring sleeve surrounding the mounting cylinder and located at the fourth annular groove.

[0041] A fourth annular groove is provided around the outside of the mounting cylinder to provide a dedicated installation position for the sealing ring sleeve, ensuring that the sealing ring sleeve is firmly installed and accurately positioned, effectively preventing axial movement and circumferential rotation of the sealing ring sleeve during device movement and operation, and ensuring stable sealing position.

[0042] The sealing ring is fitted into the fourth annular groove and arranged around the mounting cylinder, which can form a continuous and uniform annular seal with the inner wall of the pipeline, improving the sealing reliability and reducing media leakage.

[0043] The fourth annular groove cooperates with the sealing ring sleeve, resulting in a simple and compact structure that does not increase the overall outer diameter of the mounting cylinder, ensuring a smooth outer contour of the device and reducing frictional resistance and the risk of jamming when moving inside the pipeline.

[0044] The sealing ring is installed independently in the fourth ring groove, which facilitates individual assembly, maintenance and replacement, thereby reducing maintenance costs and improving the overall service life and applicability of the device.

[0045] In one embodiment, the sealing joint further includes a first pressure sensor and a first drive motor. The mounting cylinder is provided with a plurality of spaced-apart first mounting slots. The number of the first pressure sensors and the first drive motors is plurality of. The plurality of first pressure sensors are respectively spaced apart at the plurality of first mounting slots. The ends of the plurality of first pressure sensors away from the mounting cylinder are used to abut against the pipe wall. The plurality of first drive motors are respectively spaced apart at the plurality of first mounting slots. The ends of the plurality of first drive motors away from the mounting cylinder are used to abut against the pipe wall.

[0046] Multiple spaced first mounting slots are provided on the mounting cylinder to provide independent and regular mounting space for multiple first pressure sensors and multiple first drive motors, so that the components are evenly arranged and firmly installed, thereby improving the compactness and stability of the overall structure of the sealing section.

[0047] Multiple first pressure sensors are installed at the first mounting slot, with the end furthest from the mounting cylinder abutting against the pipe wall. This allows for real-time, multi-point acquisition of the contact pressure between the device and the inner wall of the pipe, enabling precise monitoring of the device's attitude, positioning status, and sealing effect, and ensuring reliable execution of positioning and sealing actions.

[0048] Multiple primary drive motors are arranged circumferentially and abut against the pipe wall, which can provide circumferential auxiliary adjustment force when the device deviates or gets stuck, so as to keep the device in a centered position and improve the stability and passability of the device moving in the pipe.

[0049] The first pressure sensor works in conjunction with the first drive motor to achieve closed-loop control of pressure feedback and active adjustment, thereby improving the intelligence level of the device operation and enhancing positioning accuracy and sealing reliability.

[0050] In one embodiment, the occlusion airbag assembly includes an airbag support, an airbag, a valve body assembly, and a compressed air tank assembly. The airbag support is disposed on the occlusion section, the airbag is disposed on the airbag support, the valve body assembly is disposed on the airbag, and the compressed air tank assembly is disposed on the airbag support. The compressed air tank assembly, the valve body assembly, and the airbag are connected in sequence. The valve body assembly enables the airbag to be connected to or disconnected from the air tank assembly.

[0051] The sealing airbag assembly integrates the airbag bracket, airbag, valve body assembly, and compressed air tank assembly into a single unit. It has a compact structure and complete functions, and can independently complete the entire process of inflation, pressure holding, and sealing without the need for external air source or pipeline connection. It is suitable for closed operation scenarios inside pipelines.

[0052] The airbag bracket provides stable installation support for the airbag and compressed air tank assembly, ensuring accurate positioning and uniform expansion of the airbag, preventing displacement and twisting of the airbag during inflation and operation, and improving sealing reliability.

[0053] The compressed air tank assembly provides an independent and stable high-pressure air source for the airbag, which can quickly inflate the airbag, respond rapidly, and achieve high sealing efficiency without the need for external power.

[0054] The valve body assembly is mounted on the air bladder and enables the connection or disconnection between the compressed air tank assembly and the air bladder. It can precisely control the inflation and pressure holding states, has a simple structure, reliable operation, effectively prevents gas leakage, and ensures stable sealing pressure.

[0055] In one embodiment, the valve body assembly is a three-way valve, and further includes a one-way valve. The three-way valve is connected to the airbag, the compressed air tank assembly, and the one-way valve, respectively. The three-way valve enables the compressed air tank assembly to connect to the airbag or enables the airbag to connect to the one-way valve.

[0056] By configuring the valve body assembly as a three-way valve and using it in conjunction with a one-way valve, the switching between the two passages of inflation and deflation can be achieved on a single valve body, simplifying the air circuit structure, reducing joints and leakage points, and improving the reliability of the air circuit system.

[0057] The three-way valve connects the compressed air tank assembly to the air bladder, enabling rapid inflation and pressure maintenance of the air bladder, ensuring rapid sealing and reliable sealing.

[0058] The three-way valve connects the airbag to the one-way valve, enabling rapid air release and depressurization of the airbag after the sealing operation is completed, facilitating the smooth retraction of the airbag and the smooth recovery of the device.

[0059] One-way valves allow gas to escape only, preventing external media from flowing back into the air chamber and valve body components. This avoids media contamination and corrosion of internal gas circuit components, and improves the adaptability and service life of the device in complex pipeline media.

[0060] In one embodiment, the magnetic adsorption joint includes a cylindrical assembly, a steel brush assembly, a valve assembly, a second outer ring sealing assembly, and a magnetic induction device. The steel brush assembly is sleeved on the cylindrical assembly, the second outer ring sealing assembly is sleeved on the cylindrical assembly, the cylindrical assembly has the drain hole, the valve assembly is disposed on the cylindrical assembly and is capable of opening or closing the drain hole, the magnetic induction device is disposed on the cylindrical assembly or the steel brush assembly and is used to sense the magnetic field of the magnetic component, and the cylindrical assembly is connected to the connecting joint.

[0061] The magnetic adsorption joint adopts modular integration of cylindrical components, steel brush components, valve components, second outer ring sealing components and magnetic induction device, which is functionally concentrated, compact in structure, and easy to process, assemble and maintain.

[0062] The steel brush assembly is fitted onto the cylinder assembly and can clean the inner wall of the pipe during the movement of the device, removing impurities, scale and obstacles, and ensuring the reliability of subsequent positioning, sealing and magnetic attraction sensing.

[0063] The second outer ring sealing component is fitted onto the cylinder assembly and can form a stable seal with the inner wall of the pipe, ensuring effective pressure relief and deceleration when the vent hole is opened, thereby improving the stopping accuracy.

[0064] The cylinder assembly is equipped with a vent hole and a valve assembly. The vent hole can be reliably opened or closed through the valve assembly, so as to achieve stable switching between device movement, depressurization and deceleration and recovery and reset.

[0065] The magnetic induction device is installed on the cylinder assembly or the steel brush assembly. It can sensitively detect the magnetic field of the magnetic components outside the pipeline and realize the automatic triggering control of the vent hole. It does not require complicated communication and power supply, and has strong anti-interference ability and fast positioning response.

[0066] The cylinder assembly and connecting section are reliably connected, ensuring that the magnetic adsorption section is coaxial and stable with the whole device, runs smoothly, and is not prone to tilting or jamming.

[0067] In one embodiment, the valve assembly includes a motor and a valve plate, and the number of drain holes is multiple. The motor is mounted on the cylinder assembly, and the valve plate is mounted on the motor. The valve plate is capable of opening or closing the multiple drain holes. The sealing section is provided with a first flow passage, and the connecting section is provided with a second flow passage.

[0068] The valve assembly uses a motor and valve plate in combination, which is simple in structure, reliable in operation, and can stably open and close multiple discharge holes, resulting in high control efficiency.

[0069] By setting multiple vent holes, the venting area can be increased, allowing the device to quickly release pressure and decelerate when it approaches the magnetic component, resulting in faster stopping and more accurate positioning.

[0070] The motor-driven valve plate controls multiple discharge holes in a unified manner, ensuring good synchronization of opening and closing and avoiding uneven force and attitude deviation caused by asynchronous opening and closing of individual holes.

[0071] The sealing section is equipped with a first flow passage and the connecting section is equipped with a second flow passage, so that the medium can pass smoothly through the inside of the device, ensuring that the device moves smoothly and the thrust is stable in the pipeline, without blocking or jamming.

[0072] In one embodiment, the steel brush assembly includes a steel brush, a second pressure sensor, and a second drive motor. The steel brush is sleeved on the cylindrical assembly. The steel brush assembly has a plurality of second mounting slots, which are arranged sequentially at intervals along the circumference of the steel brush assembly. There are multiple second pressure sensors and second drive motors. The multiple second pressure sensors are respectively arranged at intervals in the multiple second mounting slots, and the ends of the multiple second pressure sensors away from the cylindrical assembly are used to abut against the pipe wall. The multiple second drive motors are respectively arranged at intervals in the multiple second mounting slots, and the ends of the multiple second drive motors away from the cylindrical assembly are used to abut against the pipe wall.

[0073] The steel brush assembly, with steel brushes fitted onto the cylinder assembly, can clean the inner wall of the pipe during device movement, removing dirt, impurities, and rust, thus improving the reliability of subsequent sealing, magnetic induction, and positioning.

[0074] Multiple second mounting slots are arranged circumferentially on the steel brush assembly to provide regular and independent mounting space for multiple second pressure sensors and second drive motors, so that the components are evenly laid out and the force is balanced.

[0075] Multiple second pressure sensors are installed in the second mounting slot and abut against the pipe wall, enabling multi-point real-time detection of the contact pressure between the device and the inner wall of the pipe, and providing accurate feedback on the device's operating posture, centering status and position information.

[0076] Multiple second drive motors are arranged circumferentially and abut against the pipe wall. They can be actively adjusted according to the feedback of the second pressure sensor to keep the magnetic adsorption joint in the center of the pipe, avoid uneven wear and jamming, and improve the smoothness of movement.

[0077] The second pressure sensor and the second drive motor form a closed-loop regulation to achieve intelligent centering control, thereby improving the device's throughput and adaptability in variable diameter pipes, bends, and complex pipelines.

[0078] In one embodiment, the plurality of drain holes are circumferentially distributed on the cylinder assembly, and the rotation angle of the valve plate can be dynamically adjusted according to the distance between the magnetic adsorption joint and the magnetic component to adjust the range of the drain holes blocked by the valve plate.

[0079] Multiple vent holes are evenly distributed around the cylindrical assembly, which makes the venting force uniform and the device stable in posture during deceleration, making it less prone to tilting, swaying and jamming.

[0080] The valve plate can dynamically adjust the rotation angle according to the distance between the magnetic adsorption joint and the magnetic component, so as to achieve continuous and precise adjustment of the discharge area and make the deceleration process of the device smooth and controllable.

[0081] By dynamically adjusting the range of the valve plate blocking the drain hole, gradual deceleration can be achieved, avoiding device impact, vibration, or positioning overshoot caused by sudden pressure relief, thereby improving docking accuracy and operational safety.

[0082] The distance sensor is linked with the valve angle to achieve adaptive deceleration and positioning. It requires no manual intervention or complex control algorithms, and the control logic is simple, the response is fast, and the reliability is high.

[0083] The circumferentially distributed drainage holes, combined with the adjustable valve plate, ensure stable deceleration while adapting to pipeline conditions with different flow rates and pressures, thus improving the versatility and environmental adaptability of the device.

[0084] The second aspect of this application discloses a magnetic pipe sealing system, comprising: The aforementioned magnetic pipe intelligent sealing device; The pipeline has a flow channel, and the magnetic intelligent pipeline sealing device is located inside the pipeline and can move or be fixed inside the pipeline. The magnetic component is disposed on the pipe; A controller is used to send control information to the occlusion airbag assembly.

[0085] The magnetic intelligent pipeline sealing system integrates the magnetic intelligent pipeline sealing device, pipeline, magnetic components and controller into one unit to form a complete closed-loop operation system, realizing integrated intelligent operation of positioning, movement, sealing and control.

[0086] The magnetic pipe intelligent sealing device can move freely or be reliably fixed in the pipeline flow channel, and is suitable for various working conditions such as pressurized operation and non-stop sealing. It has flexible operation mode and wide application range.

[0087] The magnetic components are installed on the pipeline and work with the magnetic adsorption joints inside the device to achieve non-contact and precise positioning. There is no need to lay complex circuits inside the pipeline, and it is not affected by the pipeline medium or the shielding of the pipe wall. The positioning is stable and the response is rapid.

[0088] The controller can send control information to the occlusion airbag assembly to achieve remote automated control of the inflation, pressure holding, and depressurization of the occlusion airbag assembly, eliminating the need for manual on-site operation and improving operational safety and intelligence.

[0089] The third aspect of this application discloses a method for live pipeline repair and replacement, applied to the aforementioned magnetic intelligent pipeline sealing system, comprising the following steps: Delineate the area where the pipeline needs to be replaced and mark this area as the replacement area; Bypass branch pipe holes are opened upstream and downstream of the replacement area, and the upstream and downstream are connected by branch pipes. Install a magnetic component downstream of the replacement area, insert the magnetic adsorption section, and the magnetic adsorption section is driven to move by the fluid in the pipeline. The magnetic adsorption section drives the sealing section and sealing airbag assembly to move to the downstream of the replacement area in the pipeline. When the magnetic adsorption section senses the magnetic component, it opens the vent hole, the magnetic adsorption section decelerates and is fixed in the pipeline by the magnetic component. Install a magnetic component upstream of the replacement area, and place another magnetic adsorption section. The magnetic adsorption section is driven to move by the fluid in the pipe. The magnetic adsorption section drives the sealing section and sealing airbag assembly to move to the upstream of the replacement area in the pipe. When the magnetic adsorption section senses the magnetic component, it opens the vent hole, and the magnetic adsorption section decelerates and is fixed in the pipe by the magnetic component. Open the sealing airbag components in the upstream and downstream areas to seal the replacement areas of the pipeline; The upstream magnetic component and the downstream magnetic component are located inside the bypass branch holes of the upstream and downstream pipes, respectively.

[0090] By opening and connecting bypass branch pipe holes upstream and downstream of the replacement area, fluid bypass transportation can be achieved without interruption of pipeline transportation or pressure reduction, ensuring uninterrupted normal pipeline transportation operations and improving construction economy and continuity.

[0091] By employing a method that involves placing magnetic components on the outside of the pipeline and deploying a magnetic intelligent pipeline sealing device inside the pipeline, non-contact positioning and docking can be achieved. This eliminates the need for extensive drilling into the pipeline, complex cables, and communication devices, making construction simple and positioning accurate.

[0092] The magnetic adsorption joint, sealing joint, and sealing airbag assembly are driven by the fluid inside the pipeline to move automatically without the need for an additional power unit. They are stable in operation, have low energy consumption, and are suitable for long-distance pipelines.

[0093] When the magnetic adsorption joint senses the magnetic component, it automatically opens the vent hole to decelerate and fix itself. The action is completed automatically, the response is rapid, and the stopping position is precise, which improves the reliability and safety of the sealing operation.

[0094] By locating and sealing upstream and downstream of the replacement area, reliable isolation of the replacement area can be achieved, providing a safe, waterless, and pressureless working environment for repair operations such as pipe cutting, pipe replacement, and welding.

[0095] By placing the upstream and downstream magnetic components inside the corresponding bypass branch pipe holes, the sealing position can be located between the bypasses, ensuring that the replacement area is completely isolated without affecting the normal flow of bypass fluid, resulting in a good sealing and isolation effect. Attached Figure Description

[0096] Figure 1 A 3D view of the working state of the magnetic intelligent pipe sealing device; Figure 2 A 3D view of a magnetic pipe sealing system; Figure 3 The first exploded view of a portion of the structure of the magnetic intelligent pipe sealing device; Figure 4 A second exploded view of a portion of the structure of a magnetic pipe intelligent sealing device; Figure 5 This is the first three-dimensional view of the sealing section; Figure 6 This is the second perspective view of the sealing section; Figure 7 This is the first exploded view of the sealing section; Figure 8 This is the second exploded view of the sealing section; Figure 9 This is an exploded view of the first pressure sensor. Figure 10 The first three-dimensional view of the magnetic adsorption joint; Figure 11 This is a second three-dimensional view of the magnetic adsorption joint; Figure 12 This is an exploded view of the magnetic adsorption joint; Figure 13 This is an exploded view of the steel brush assembly; Figure 14 A perspective view of the cylinder assembly and valve assembly; Figure 15 Exploded views of the cylinder assembly and valve assembly; Figure 16 A 3D view of the airbag assembly; Figure 17 An exploded view of the airbag assembly.

[0097] The correspondence between the reference numerals and the component names is as follows: 1 Magnetic adsorption joint, 11 Cylinder assembly, 12 Steel brush assembly, 121 Steel brush, 122 Second pressure sensor, 123 Second drive motor, 13 Valve assembly, 131 Motor, 132 Valve plate, 14 Second outer ring sealing assembly, 101 Drain hole, 1201 Second mounting groove; 2 connecting sections; 3. Sealing section, 31. Mounting cylinder, 3111. Guide rod, 32. Positioning assembly, 321. Wedge-shaped retaining ring, 322. Pushing motor, 323. Slip, 33. First outer ring sealing assembly, 331. First sealing plate assembly, 332. Second sealing plate assembly, 333. Sealing ring sleeve, 34. First pressure sensor, 35. First drive motor, 301. First annular groove, 302. Second annular groove, 303. Third annular groove, 304. Fourth annular groove; 4. Magnetic components; 5. Occlusion airbag assembly, 51. Airbag bracket, 52. Airbag, 53. Valve body assembly, 54. Compressed air tank assembly, 55. One-way valve; 200 pipes. Detailed Implementation

[0098] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0099] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

[0100] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0101] The magnetic pipe intelligent sealing device, system, and pipe live repair and replacement method of the present invention are described below with reference to the accompanying drawings. Example 1

[0102] like Figures 1 to 17As shown, this embodiment discloses a magnetic pipe intelligent sealing device, including: a magnetic adsorption section 1, which has a drain hole 101 that can be opened or closed, and is used to move inside the pipe; a connecting section 2, one end of which is connected to the magnetic adsorption section 1; a sealing section 3, which is connected to the end of the connecting section 2 away from the magnetic adsorption section 1, and is used to move inside the pipe; a magnetic component 4, which can magnetically position the magnetic adsorption section 1, and the magnetic adsorption section 1 has at least a first position and a second position, the first position being away from the magnetic component 4, and the second position being adjacent to the magnetic component 4. When the magnetic adsorption section 1 is in the first position, the drain hole 101 is closed, and when the magnetic adsorption section 1 moves from the first position to the second position, the drain hole 101 of the magnetic adsorption section 1 is opened, and the magnetic component 4 is used to be installed outside the pipe; and a sealing airbag assembly 5, which is installed on the sealing section 3.

[0103] The magnetic pipe intelligent sealing device disclosed in this application adopts a three-section split design consisting of magnetic adsorption section 1, connecting section 2, and sealing section 3. Each part has a clear function and a simple structure, which is convenient for processing, assembly, and later maintenance and replacement. It also ensures that the device as a whole has sufficient structural strength and coaxiality, making the device move more smoothly in the pipeline and reducing problems such as jamming and deflection.

[0104] By cooperating with the magnetic component 4 set on the outside of the pipe and the magnetic adsorption joint 1 inside the pipe, non-contact magnetic positioning is achieved. There is no need to set up a complex positioning, power supply and communication structure inside the pipe. It is not affected by the signal shielding of the pipe's metal wall. The positioning response is fast and the position is accurate. It is suitable for various pipeline working conditions such as buried, long distance, and closed.

[0105] The magnetic adsorption joint 1 is provided with a drain hole 101 that can be opened or closed, and it forms a position linkage with the magnetic component 4: when the magnetic adsorption joint 1 is in the first position away from the magnetic component 4, the drain hole 101 remains closed, and the device can move forward stably under the push of the medium in the pipeline; when the magnetic adsorption joint 1 moves from the first position to the second position closer to the magnetic component 4, the drain hole 101 automatically opens, realizing medium leakage, pressure relief and deceleration, so that the device can be smoothly stopped at the target sealing position, realizing automatic stopping, with simple control logic and reliable operation.

[0106] The sealing section 3 is equipped with a sealing airbag assembly 5. After the device completes magnetic positioning and stops stably, the sealing airbag assembly 5 can expand to seal the pipeline. It integrates magnetic positioning, automatic deceleration and medium sealing functions into one, realizing the integrated and intelligent pipeline pressurized sealing operation, which significantly improves the efficiency and safety of sealing operation.

[0107] like Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, in addition to the features of the above embodiments, this embodiment further defines that: the sealing section 3 includes an installation cylinder 31, a positioning component 32 and a first outer ring sealing component 33, the positioning component 32 is disposed on the installation cylinder 31, and the positioning component 32 has at least a storage state and a positioning state, the first outer ring sealing component 33 is sleeved on the installation cylinder 31, the installation cylinder 31 is connected to the end of the connecting section 2 away from the magnetic adsorption section 1, and the sealing airbag component 5 is disposed on the sealing section 3.

[0108] The sealing section 3 is modularly combined with the mounting cylinder 31, positioning component 32 and first outer ring sealing component 33. The structure has a clear division of labor and is easy to assemble. It is convenient for individual processing, testing and maintenance replacement of each component, while ensuring the compactness and stability of the overall structure of the sealing section 3, and is suitable for the narrow working space inside the pipeline.

[0109] As the core load-bearing component of the sealing section 3, the mounting cylinder 31 achieves a reliable connection with the end of the connecting section 2 away from the magnetic adsorption section 1, ensuring the coaxiality and connection rigidity of the sealing section 3 and the overall device, and ensuring the stability of the sealing section 3 when the device moves in the pipeline, avoiding skewness; on the other hand, it provides a stable installation benchmark for the positioning component 32, the first outer ring sealing component 33 and the sealing airbag component 5, ensuring the accurate installation position of each component and avoiding the impact of installation deviation on the operation effect.

[0110] The positioning component 32 is mounted on the mounting cylinder 31 and has a switchable design for a retracted state and a positioning state to adapt to the needs of different operating stages of the device: when the device moves inside the pipeline, the positioning component 32 is in the retracted state and will not protrude from the outer periphery of the mounting cylinder 31, reducing friction and jamming with the inner wall of the pipeline and ensuring smooth movement of the device; when the device reaches the target sealing position, the positioning component 32 switches to the positioning state, which can firmly fit against the inner wall of the pipeline to achieve rigid anchoring, and stably fix the sealing section 3 and the entire device in the sealing position, offsetting the high pressure thrust and impact force of the medium inside the pipeline, providing reliable positional guarantee for the expansion and sealing of the sealing airbag component 5, and avoiding sealing failure due to device displacement.

[0111] The first outer ring sealing component 33 is sleeved on the mounting cylinder 31. After the positioning component 32 completes the positioning, it can form a preliminary seal with the inner wall of the pipe, fill the tiny gap between the mounting cylinder 31 and the inner wall of the pipe, reduce the leakage of the medium from the gap, lay the foundation for the expansion seal of the sealing airbag component 5, and improve the overall sealing effect.

[0112] like Figure 7 and Figure 8As shown, in addition to the features of the above embodiments, this embodiment further defines: the positioning component 32 includes a wedge-shaped retaining ring 321, a push motor 322, and a locking piece 323. A guide rod 3111 is provided on the mounting cylinder 31. The wedge-shaped retaining ring 321 is slidably disposed on the guide rod 3111. The push motor 322 is disposed on the wedge-shaped retaining ring 321, and one end of the push motor 322 away from the wedge-shaped retaining ring 321 abuts against the mounting cylinder 31. There are multiple locking pieces 323, which are movably disposed on the wedge-shaped retaining ring 321. The multiple locking pieces 323 are arranged sequentially at intervals along the circumference of the wedge-shaped retaining ring 321. The multiple locking pieces 323 are located on the side of the wedge-shaped retaining ring 321 away from the push motor 322, and one end of the multiple locking pieces 323 away from the push motor 322 abuts against the mounting cylinder 31.

[0113] The positioning component 32 adopts a mechanical transmission structure with wedge-shaped retaining ring 321, push motor 322, and slip 323 working together. It has reliable transmission and large force, which can provide stable and reliable pipe wall anchoring force for the device and ensure that it does not displace under the pressure impact of pipeline medium.

[0114] The wedge-shaped retaining ring 321 is slidably mounted on the guide rod 3111. Its movement trajectory is precise and its guidance is stable, which can effectively prevent the wedge-shaped retaining ring 321 from deflecting or jamming during movement, and ensure smooth and reliable positioning action.

[0115] The push motor 322 directly drives the wedge-shaped retaining ring 321 to move axially. The driving method is simple and the response is fast. It can accurately control the extension and retraction of the retaining clip 323 and realize the rapid switching between the storage state and the positioning state.

[0116] Multiple slips 323 are arranged sequentially and spaced apart along the circumference. Under the push of the wedge-shaped retaining ring 321, they can be pushed outward simultaneously to form multi-point uniform contact support with the inner wall of the pipe, so that the anchoring force is balanced and the positioning is firm and stable.

[0117] One end of the slip 323 abuts against the mounting cylinder 31, providing stable support. Under the pushing action of the jacking motor 322, the axial thrust is efficiently converted into the radial clamping force of the slip 323, resulting in high transmission efficiency and reliable positioning.

[0118] In addition to the features of the above embodiments, this embodiment further specifies that: the slip 323 is a magnetic component, and the slip 323 is adsorbed onto the wedge-shaped retaining ring 321. By setting the slip 323 as a magnetic component and adsorbing it onto the wedge-shaped retaining ring 321, reliable contact between the slip 323 and the wedge-shaped retaining ring 321 can be achieved without additional hinges, pins, or elastic reset structures, simplifying the installation and reset structure of the slip 323 and reducing assembly complexity and potential failure points.

[0119] The slip 323 and the wedge-shaped retaining ring 321 are pre-positioned by magnetic attraction. When the device is moving or not in operation, the slip 323 can be stably kept in the storage position, and it is not easy to loosen, shake or cause accidental friction with the inner wall of the pipe, thus improving the stability of the device in the pipe.

[0120] During the positioning process, the slip 323 moves synchronously with the wedge-shaped retaining ring 321 under the magnetic attraction, ensuring smooth and consistent movement of the slip 323, avoiding jamming, misalignment or stuckness, and improving the reliability and stability of the positioning component 32.

[0121] The magnetic coupling structure facilitates the disassembly, replacement, and maintenance of the KV 323. It achieves a reliable connection without the need for complex fasteners, which is beneficial for later maintenance and component replacement, and improves the overall maintainability and service life of the device.

[0122] like Figure 7 and Figure 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the mounting cylinder 31 is provided with a first annular groove 301, the positioning component 32 is located at the first annular groove 301, the first annular groove 301 surrounds the mounting cylinder 31 and is located outside the mounting cylinder 31, the guide rod 3111 is located on one side wall of the first annular groove 301, the side of the push motor 322 away from the wedge-shaped retaining ring 321 abuts against the side wall provided with the guide rod 3111, and the retaining plate 323 abuts against the other side wall of the first annular groove 301.

[0123] A first annular groove 301 is provided around the outside of the mounting cylinder 31 to provide a dedicated mounting space for the positioning assembly 32.

[0124] The guide rod 3111 is located on one side wall of the first annular groove 301, providing stable and precise sliding guidance for the wedge-shaped retaining ring 321, limiting its radial offset and circumferential rotation, and ensuring smooth and reliable axial movement.

[0125] The side of the push motor 322 away from the wedge-shaped retaining ring 321 abuts against the side wall of the first annular groove 301 where the guide rod 3111 is provided, forming a stable axial support. This allows the thrust of the push motor 322 to act on the wedge-shaped retaining ring 321 efficiently and directly, resulting in high power transmission efficiency and reasonable structural stress distribution.

[0126] The slip 323 abuts against the other side wall of the first annular groove 301, forming a reliable support and limiting structure. During the pushing and wedge transmission process, the slip 323 has a stable movement trajectory and uniform radial extension, ensuring reliable positioning support.

[0127] The first annular groove 301 integrates the positioning component 32 into the wall area of ​​the mounting cylinder 31, resulting in a compact structure, high space utilization, and no additional increase in the overall outer diameter of the device. This facilitates the adaptation to pipes with different inner diameters, improving the device's versatility and operational stability.

[0128] like Figure 7 and Figure 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the mounting cylinder 31 is also provided with a second annular groove 302 and a third annular groove 303, the second annular groove 302 and the third annular groove 303 surround the mounting cylinder 31 and are located outside the mounting cylinder 31, the positioning component 32 is located between the second annular groove 302 and the third annular groove 303, and the first outer ring sealing component 33 includes a first sealing plate component 331 and a second sealing plate component 332, the first sealing plate component 331 and the second sealing plate component 332 surround the mounting cylinder 31 and are respectively located at the second annular groove 302 and the third annular groove 303.

[0129] A second annular groove 302 and a third annular groove 303 are provided on the outside of the mounting cylinder 31, and the two annular grooves are used to install the first sealing plate assembly 331 and the second sealing plate assembly 332, respectively. The installation position is clear and the assembly accuracy is high, which can effectively prevent the first outer ring sealing assembly 33 from axial movement during operation and ensure a stable and reliable sealing position.

[0130] The positioning component 32 is arranged between the second annular groove 302 and the third annular groove 303, so that the first sealing plate component 331, the positioning component 32, and the second sealing plate component 332 are arranged in an orderly manner along the axial direction of the mounting cylinder 31. The structure is compact and reasonable, with high space utilization, without increasing the overall size of the device, and it is easy to move smoothly in the pipeline.

[0131] The first sealing plate assembly 331 and the second sealing plate assembly 332 are located on both sides of the positioning assembly 32, forming a front and rear double sealing structure. This structure can provide double protection for the pipeline medium after the device is positioned, significantly improving the overall sealing effect and reducing the risk of leakage.

[0132] The two sealing components are installed in independent annular grooves respectively, which ensure uniform force distribution and stable fit. This provides protection for the positioning component 32, reduces the impact of media erosion and impurity wear on the positioning component 32, and improves the working stability and service life of the positioning component 32.

[0133] The combination structure of the ring groove and sealing plate assembly is simple, and the installation and replacement are convenient. This facilitates the processing and manufacturing of the device, on-site maintenance and component replacement, and improves the overall practicality and versatility of the device.

[0134] like Figure 7 and Figure 8As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the mounting cylinder 31 is also provided with a fourth annular groove 304, the fourth annular groove 304 surrounds the mounting cylinder 31 and is located outside the mounting cylinder 31, and the first outer ring sealing assembly 33 includes a sealing ring sleeve 333, the sealing ring sleeve 333 surrounds the mounting cylinder 31 and is located at the fourth annular groove 304.

[0135] A fourth annular groove 304 is provided around the outside of the mounting cylinder 31 to provide a dedicated installation position for the sealing ring 333, so that the sealing ring 333 is installed firmly and positioned accurately, effectively preventing the sealing ring 333 from axial movement and circumferential rotation during device movement and operation, and ensuring stable sealing position.

[0136] The sealing ring 333 is fitted into the fourth annular groove 304 and arranged around the mounting cylinder 31, which can form a continuous and uniform annular seal with the inner wall of the pipeline, improve the sealing reliability and reduce media leakage.

[0137] The fourth annular groove 304 cooperates with the sealing ring sleeve 333, which has a simple and compact structure. It does not increase the overall outer diameter of the mounting cylinder 31, ensuring a smooth outer contour of the device and reducing frictional resistance and jamming risk when moving in the pipeline.

[0138] The sealing ring 333 is independently installed in the fourth ring groove 304, which facilitates individual assembly, maintenance and replacement, helps to reduce maintenance costs and improve the overall service life and applicability of the device.

[0139] like Figure 5 and Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the sealing section 3 also includes a first pressure sensor 34 and a first drive motor 35, the mounting cylinder 31 is provided with a plurality of spaced first mounting slots, the number of the first pressure sensor 34 and the first drive motor 35 is multiple, the plurality of first pressure sensors 34 are respectively spaced at the plurality of first mounting slots, the end of the plurality of first pressure sensors 34 away from the mounting cylinder 31 is used to abut against the pipe wall, the plurality of first drive motors 35 are respectively spaced at the plurality of first mounting slots, the end of the plurality of first drive motors 35 away from the mounting cylinder 31 is used to abut against the pipe wall.

[0140] Multiple spaced first mounting slots are provided on the mounting cylinder 31 to provide independent and regular mounting space for multiple first pressure sensors 34 and multiple first drive motors 35, so that the components are evenly arranged and firmly installed, thereby improving the compactness and stability of the overall structure of the sealing section 3.

[0141] Multiple first pressure sensors 34 are respectively installed in the first mounting groove and the end away from the mounting cylinder 31 abuts against the pipe wall. They can collect the contact pressure between the device and the inner wall of the pipe in real time and at multiple points, so as to realize the accurate monitoring of the device's attitude, positioning status and sealing effect, and ensure the reliable execution of positioning and sealing actions.

[0142] Multiple first drive motors 35 are arranged circumferentially and abut against the pipe wall. They can provide circumferential auxiliary adjustment force when the device is tilted or stuck, so as to keep the device in a centered position and improve the stability and passability of the device in the pipe.

[0143] The first pressure sensor 34 works in conjunction with the first drive motor 35 to achieve closed-loop control of pressure feedback and active adjustment, thereby improving the intelligence level of the device operation and enhancing positioning accuracy and sealing reliability.

[0144] like Figure 9 As shown, in addition to the features of the above embodiments, this embodiment further defines: the first pressure sensor 34 includes a bottom shell 341, a cover 342, a pressure sensor 343, a spring 344, a sensing rod 345, and a sealing ring 346. The cover 342 is disposed on the bottom shell 341, and the cover 342 and the bottom shell 341 enclose an installation space. A portion of the sensing rod 345 is located within the installation space and a portion extends beyond the installation space after passing through the cover 342. The portion of the sensing rod 345 located within the installation space is movable. The pressure sensor 343 is located within the installation space. One end of the spring 344 abuts against the pressure sensor 343, and the other end abuts against the sensing rod 345. The sensing rod 345 is provided with a sealing groove 3401, which surrounds the sensing rod 345. The sealing ring 346 is sleeved on the sensing rod 345 and located at the sealing groove 3401. The sealing ring 346 is sandwiched between the sensing rod 345 and the inner wall of the installation space.

[0145] like Figure 16 and Figure 17 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the sealing airbag assembly 5 includes an airbag bracket 51, an airbag 52, a valve body assembly 53, and a compressed air tank assembly 54. The airbag bracket 51 is disposed on the sealing section 2, the airbag 52 is disposed on the airbag bracket 51, the valve body assembly 53 is disposed on the airbag 52, and the compressed air tank assembly 54 is disposed on the airbag bracket 51. The compressed air tank assembly 54, the valve body assembly 53, and the airbag 52 are connected in sequence. The valve body assembly 53 enables the airbag 52 to be connected to or disconnected from the air tank assembly 54.

[0146] The sealing airbag assembly 5 is an integrated set of airbag bracket 51, airbag 52, valve body assembly 53 and compressed air tank assembly 54. It has a compact structure and complete functions, and can independently complete the entire process of inflation, pressure holding and sealing without the need for external air source and pipeline connection. It is suitable for closed operation scenarios inside pipelines.

[0147] The airbag bracket 51 provides stable installation support for the airbag 52 and the compressed air tank assembly 54, ensuring that the airbag 52 is accurately positioned and evenly deployed, preventing the airbag 52 from shifting or twisting during inflation and operation, and improving sealing reliability.

[0148] The compressed air tank assembly 54 provides an independent and stable high-pressure air source for the airbag 52, which can quickly inflate the airbag 52, with rapid response and high sealing efficiency, and can achieve rapid sealing without external power.

[0149] The valve body assembly 53 is mounted on the air bladder 52 and enables the connection or disconnection between the compressed air tank assembly 54 and the air bladder 52. It can precisely control the inflation and pressure holding states, has a simple structure, reliable operation, effectively prevents gas leakage, and ensures stable sealing pressure.

[0150] like Figure 16 and Figure 17 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the valve body assembly 53 is a three-way valve, and also includes a one-way valve 55. The three-way valve is connected to the air bag 52, the compressed air tank assembly 54 and the one-way valve 55 respectively. The three-way valve can connect the compressed air tank assembly 54 to the air bag 52 or the three-way valve can connect the air bag 52 to the one-way valve 55.

[0151] By configuring the valve body assembly 53 as a three-way valve and using it in conjunction with the one-way valve 55, the switching between the two passages of air filling and air venting can be achieved on a single valve body, simplifying the air circuit structure, reducing joints and leakage points, and improving the reliability of the air circuit system.

[0152] The three-way valve connects the compressed air tank assembly 54 to the air bladder 52, enabling rapid inflation and pressure maintenance of the air bladder 52, ensuring rapid sealing and reliable sealing.

[0153] The three-way valve connects the airbag 52 to the one-way valve 55, enabling rapid air release and depressurization of the airbag 52 after the sealing operation is completed, facilitating the smooth retraction of the airbag 52 and ensuring the smooth recovery of the device.

[0154] The one-way valve 55 only allows gas to be discharged outward, which can prevent external media from flowing back into the air bag 52 and valve body assembly 53, avoid media contamination and corrosion of internal gas circuit components, and improve the adaptability and service life of the device in complex pipeline media.

[0155] like Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15As shown, in addition to the features of the above embodiments, this embodiment further defines: the magnetic adsorption section 1 includes a cylindrical assembly 11, a steel brush assembly 12, a valve assembly 13, a second outer ring sealing assembly 14, and a magnetic induction device. The steel brush assembly 12 is sleeved on the cylindrical assembly 11, the second outer ring sealing assembly 14 is sleeved on the cylindrical assembly 11, the cylindrical assembly 11 is provided with a drain hole 101, the valve assembly 13 is disposed on the cylindrical assembly 11, the valve assembly 13 can open or close the drain hole 101, the magnetic induction device is disposed on the cylindrical assembly 11 or the steel brush assembly 12, the magnetic induction device is used to sense the magnetic field of the magnetic component 4, and the cylindrical assembly 11 is connected to the connecting section 2.

[0156] The magnetic adsorption section 1 is modularly integrated with the cylinder assembly 11, steel brush assembly 12, valve assembly 13, second outer ring sealing assembly 14 and magnetic induction device. It has concentrated functions, compact structure, and is easy to process, assemble and maintain.

[0157] The steel brush assembly 12 is mounted on the cylinder assembly 11 and can clean the inner wall of the pipe during the movement of the device, removing impurities, scale and obstacles, and ensuring the reliability of subsequent positioning, sealing and magnetic attraction sensing.

[0158] The second outer ring sealing component 14 is fitted on the cylinder component 11 and can form a stable seal with the inner wall of the pipe, ensuring that the vent hole 101 can effectively relieve pressure and decelerate when it is opened, thereby improving the stopping accuracy.

[0159] The cylinder assembly 11 is provided with a vent hole 101 and a valve assembly 13. The vent hole 101 can be reliably opened or closed through the valve assembly 13, so as to realize stable switching of device movement, depressurization and deceleration and recovery and reset.

[0160] The magnetic induction device is installed on the cylinder assembly 11 or the steel brush assembly 12. It can sensitively detect the magnetic field of the magnetic component 4 outside the pipe and realize the automatic triggering control of the vent hole 101. It does not require complicated communication and power supply, has strong anti-interference ability and fast positioning response.

[0161] The cylinder assembly 11 is reliably connected to the connecting section 2, ensuring that the magnetic adsorption section 1 is coaxial and stable with the whole device, runs smoothly, and is not prone to tilting or jamming.

[0162] like Figure 14 and Figure 15As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the valve assembly 13 includes a motor 131 and a valve plate 132, and the number of drain holes 101 is multiple. The motor 131 is mounted on the cylinder assembly 11, and the valve plate 132 is mounted on the motor 131. The valve plate 132 can open or close multiple drain holes 101. The sealing section 2 is provided with a first flow channel, and the connecting section 2 is provided with a second flow channel. The valve assembly 13, using the motor 131 and the valve plate 132 in cooperation, has a simple structure, reliable operation, and can stably realize the opening and closing of multiple drain holes 101, resulting in high control efficiency. Setting multiple drain holes 101 can increase the drain area, allowing the device to quickly depressurize and slow down when approaching the magnetic component 4, resulting in faster stopping and more accurate positioning.

[0163] The motor 131 drives the valve plate 132 to uniformly control multiple discharge holes 101, which has good opening and closing synchronization and avoids uneven force and attitude deviation caused by asynchronous opening and closing of individual holes.

[0164] The sealing section 3 is equipped with a first flow passage and the connecting section 2 is equipped with a second flow passage, so that the medium can pass smoothly through the inside of the device, ensuring that the device moves smoothly and the thrust is stable in the pipeline, and that there is no blockage or jamming.

[0165] like Figure 12 and Figure 13 As shown, in addition to the features of the above embodiments, this embodiment further defines: the steel brush assembly 12 includes a steel brush 121, a second pressure sensor 122, and a second drive motor 123. The steel brush 121 is sleeved on the cylindrical assembly 11. The steel brush assembly 12 is provided with a plurality of second mounting slots 1201, which are arranged sequentially at intervals along the circumference of the steel brush assembly 12. The number of second pressure sensors 122 and second drive motors 123 is plurality of. The plurality of second pressure sensors 122 are respectively arranged at intervals in the plurality of second mounting slots 1201. The ends of the plurality of second pressure sensors 122 away from the cylindrical assembly 11 are used to abut against the pipe wall. The plurality of second drive motors 123 are respectively arranged at intervals in the plurality of second mounting slots 1201. The ends of the plurality of second drive motors 123 away from the cylindrical assembly 11 are used to abut against the pipe wall.

[0166] The steel brush assembly 12 is fitted onto the cylinder assembly 11 with steel brush 121, which can clean the inner wall of the pipe during the movement of the device, remove dirt, impurities and rust from the pipe wall, and improve the reliability of subsequent sealing, magnetic attraction sensing and positioning.

[0167] Multiple second mounting slots 1201 are arranged circumferentially at intervals on the steel brush assembly 12, providing a regular and independent installation space for multiple second pressure sensors 122 and second drive motors 123, resulting in a uniform component layout and balanced force distribution. The multiple second pressure sensors 122 are respectively installed in the second mounting slots 1201 and abut against the pipe wall, enabling multi-point real-time detection of the contact pressure between the device and the inner wall of the pipe, accurately providing feedback on the device's operating posture, centering status, and position information.

[0168] Multiple second drive motors 123 are arranged circumferentially and abut against the pipe wall. They can be actively adjusted according to the feedback of the second pressure sensor 122 to keep the magnetic adsorption joint 12 always in the center of the pipe, avoid uneven wear and jamming, and improve the smoothness of movement.

[0169] The second pressure sensor 122 and the second drive motor 123 form a closed-loop regulation to achieve intelligent centering control, thereby improving the device's throughput and adaptability in variable diameter pipes, bends, and complex pipelines.

[0170] like Figure 14 and Figure 15 As shown, in addition to the features of the above embodiments, this embodiment further defines that: a plurality of drain holes 101 are circumferentially distributed on the cylinder assembly 11, and the rotation angle of the valve plate 132 can be dynamically adjusted according to the distance between the magnetic adsorption joint 1 and the magnetic component 4 to adjust the range of the valve plate 132 blocking the drain holes 101.

[0171] Multiple vent holes 101 are evenly distributed around the cylindrical assembly 11, which makes the venting force uniform and the device stable in attitude during deceleration, and is not prone to tilting, swinging and jamming.

[0172] The valve plate 132 can dynamically adjust the rotation angle according to the distance between the magnetic adsorption section 1 and the magnetic component 4, so as to realize the continuous and precise adjustment of the discharge area and make the deceleration process of the device smooth and controllable.

[0173] The range of the valve plate 132 blocking the drain hole 101 can be dynamically adjusted to achieve gradual deceleration, avoid device impact, vibration or positioning overshoot caused by sudden pressure relief, and improve docking accuracy and operational safety.

[0174] The distance sensor is linked with the valve angle to achieve adaptive deceleration and positioning. It requires no manual intervention or complex control algorithms, and the control logic is simple, the response is fast, and the reliability is high.

[0175] The circumferentially distributed drainage holes, combined with the adjustable valve plate 132, ensure stable deceleration while adapting to pipeline conditions with different flow rates and pressures, thereby improving the versatility and environmental adaptability of the device. Example 2

[0176] like Figures 1 to 2As shown, this embodiment discloses a magnetic pipe intelligent sealing system, including: The aforementioned magnetic pipe intelligent sealing device; Pipeline 200 is provided with a flow channel. The magnetic intelligent pipe sealing device is located inside pipeline 200 and can move or be fixed inside pipeline 200. Magnetic component 4 is installed on pipe 200; The controller is used to send control information to the occlusion airbag assembly 5.

[0177] The magnetic intelligent pipe sealing system integrates the magnetic intelligent pipe sealing device, pipe 200, magnetic component 4 and controller into one unit to form a complete closed-loop operation system, realizing integrated intelligent operation of positioning, movement, sealing and control.

[0178] The magnetic pipe intelligent sealing device can move freely or be reliably fixed within the 200mm flow channel of the pipe. It is suitable for various working conditions such as pressurized operation and non-stop sealing. It has flexible operation mode and wide application range.

[0179] The magnetic component 4 is installed on the pipe 200 and works with the magnetic adsorption joint 1 in the device to achieve non-contact precise positioning. There is no need to lay complex circuits in the pipe 200, and it is not affected by the pipe medium and the pipe wall shielding. The positioning is stable and the response is rapid.

[0180] The controller can send control information to the sealing airbag assembly 5 to realize remote automated control of the inflation, pressure holding and depressurization of the sealing airbag assembly 5, without the need for manual on-site operation, thus improving the safety and intelligence of the operation. Example 3

[0181] This embodiment discloses a method for live pipeline repair and replacement, applied to the aforementioned magnetic intelligent pipeline sealing system, including the following steps: Define the area of ​​pipe 200 that needs to be replaced, and mark this area as the replacement area; Bypass branch pipe holes are opened upstream and downstream of the replacement area, and the upstream and downstream are connected by branch pipes. Install a magnetic component 4 downstream of the replacement area, insert a magnetic adsorption section 1, and move the magnetic adsorption section 1 driven by the fluid in the pipe 200. The magnetic adsorption section 1 drives the sealing section 3 and the sealing airbag assembly 5 to move to the downstream of the replacement area in the pipe 200. When the magnetic adsorption section 1 senses the magnetic component 4, it opens the drain hole 101, and the magnetic adsorption section 1 decelerates and is fixed in the pipe 200 by the magnetic component 4. Install a magnetic component 4 upstream of the replacement area, and insert another magnetic adsorption section 1. The magnetic adsorption section 1 is driven to move by the fluid in the pipe 200. The magnetic adsorption section 1 drives the sealing section 3 and the sealing airbag assembly 5 to move to the upstream of the replacement area in the pipe 200. When the magnetic adsorption section 1 senses the magnetic component 4, it opens the drain hole 101. The magnetic adsorption section 1 decelerates and is fixed in the pipe 200 by the magnetic component 4. Open the sealing airbag assembly 5 in the upstream and downstream areas to seal the replacement area of ​​the sealing pipeline 200; The upstream magnetic component 4 and the downstream magnetic component 4 are located inside the bypass branch holes of the upstream and downstream pipes, respectively.

[0182] By opening and connecting bypass branch pipe holes upstream and downstream of the replacement area, fluid bypass transportation can be achieved without interruption of pipeline transportation or pressure reduction, ensuring uninterrupted normal pipeline transportation operations and improving construction economy and continuity.

[0183] By deploying magnetic components 4 on the outside of the pipeline and placing a magnetic intelligent pipeline sealing device inside the pipeline, non-contact positioning and docking can be achieved. This eliminates the need for extensive drilling of the pipeline, complex cables and communication devices, making construction simple and positioning accurate.

[0184] The magnetic adsorption section 1, the sealing section 3, and the sealing airbag assembly 5 are driven by the fluid inside the pipeline to move automatically without the need for an additional power unit. The operation is stable, energy consumption is low, and it is suitable for long-distance pipeline transportation.

[0185] When the magnetic adsorption joint 1 senses the magnetic component 4, it automatically opens the vent hole 101 to achieve deceleration and fixation. The action is completed automatically, the response is rapid, and the stopping position is accurate, which improves the reliability and safety of the sealing operation.

[0186] By locating and sealing upstream and downstream of the replacement area, reliable isolation of the replacement area can be achieved, providing a safe, waterless, and pressureless working environment for repair operations such as pipe cutting, pipe replacement, and welding.

[0187] By placing the upstream and downstream magnetic components 4 inside the corresponding bypass branch pipe holes, the sealing position can be located between the bypasses, ensuring that the replacement area is completely isolated, while not affecting the normal flow of bypass fluid, resulting in a good sealing and isolation effect.

[0188] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0189] The above embodiments are merely examples of several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent.

[0190] It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these modifications and improvements are all within the scope of protection of this invention.

[0191] Therefore, the scope of protection of this invention patent shall be determined by the appended claims.

Claims

1. A magnetic pipe sealing device, characterized in that, The magnetic pipe intelligent sealing device includes: A magnetic adsorption section (1) is provided with a drain hole (101) that can be opened or closed, and the magnetic adsorption section (1) is used to move within the pipe; Connecting section (2), one end of which is connected to the magnetic adsorption section (1); A sealing section (3) is connected to the end of the connecting section (2) away from the magnetic adsorption section (1), and the sealing section (3) is used to move within the pipeline; A magnetic component (4) is provided, which is capable of magnetically positioning the magnetic adsorption section (1). The magnetic adsorption section (1) has at least a first position and a second position. The first position is away from the magnetic component (4), and the second position is adjacent to the magnetic component (4). When the magnetic adsorption section (1) is located in the first position, the drain hole (101) is closed. When the magnetic adsorption section (1) moves from the first position to the second position, the drain hole (101) of the magnetic adsorption section (1) is opened. The magnetic component (4) is used to be installed outside the pipe. The occlusion airbag assembly (5) is disposed on the occlusion section (3).

2. The magnetic pipe intelligent sealing device according to claim 1, characterized in that, The sealing section (3) includes an installation cylinder (31), a positioning component (32), and a first outer ring sealing component (33). The positioning component (32) is disposed on the installation cylinder (31) and has at least a storage state and a positioning state. The first outer ring sealing component (33) is sleeved on the installation cylinder (31). The installation cylinder (31) is connected to the end of the connecting section (2) away from the magnetic adsorption section (1). The sealing airbag component (5) is disposed on the sealing section (3).

3. The magnetic pipe intelligent sealing device according to claim 2, characterized in that, The positioning assembly (32) includes a wedge-shaped retaining ring (321), a push motor (322), and a locking piece (323). A guide rod (3111) is provided on the mounting cylinder (31). The wedge-shaped retaining ring (321) is slidably mounted on the guide rod (3111). The push motor (322) is mounted on the wedge-shaped retaining ring (321), and one end of the push motor (322) away from the wedge-shaped retaining ring (321) abuts against the mounting cylinder (31). The number of the slips (323) is multiple, and the multiple slips (323) are movably disposed on the wedge-shaped retaining ring (321). The multiple slips (323) are arranged sequentially at intervals along the circumference of the wedge-shaped retaining ring (321). The multiple slips (323) are located on the side of the wedge-shaped retaining ring (321) away from the push motor (322), and the end of the multiple slips (323) away from the push motor (322) abuts against the mounting cylinder (31).

4. The magnetic pipe intelligent sealing device according to claim 3, characterized in that, The slip (323) is a magnetic component, and the slip (323) is adsorbed onto the wedge-shaped retaining ring (321); And / or the mounting cylinder (31) is provided with a first annular groove (301), the positioning component (32) is located at the first annular groove (301), the first annular groove (301) surrounds the mounting cylinder (31) and is located outside the mounting cylinder (31), the guide rod (3111) is located on one side wall of the first annular groove (301), the push motor (322) abuts against the side wall provided with the guide rod (3111) on the side away from the wedge-shaped retaining ring (321), and the retaining clip (323) abuts against the other side wall of the first annular groove (301); And / or the mounting cylinder (31) is further provided with a second annular groove (302) and a third annular groove (303), the second annular groove (302) and the third annular groove (303) surround the mounting cylinder (31) and are located outside the mounting cylinder (31), the positioning component (32) is located between the second annular groove (302) and the third annular groove (303), the first outer ring sealing component (33) includes a first sealing plate component (331) and a second sealing plate component (332), the first sealing plate component (331) and the second sealing plate component (332) surround the mounting cylinder (31) and the first sealing plate component (331) and the second sealing plate component (332) are respectively located at the second annular groove (302) and the third annular groove (303); And / or the mounting cylinder (31) is further provided with a fourth annular groove (304) which surrounds the mounting cylinder (31) and is located outside the mounting cylinder (31), and the first outer ring sealing assembly (33) includes a sealing ring sleeve (333) which surrounds the mounting cylinder (31) and is located at the fourth annular groove (304).

5. The magnetic pipe intelligent sealing device according to claim 2, characterized in that, The sealing section (3) further includes a first pressure sensor (34) and a first drive motor (35). The mounting cylinder (31) is provided with a plurality of spaced first mounting slots. The number of the first pressure sensor (34) and the first drive motor (35) is multiple. The plurality of first pressure sensors (34) are respectively spaced at the plurality of first mounting slots. The end of the plurality of first pressure sensors (34) away from the mounting cylinder (31) is used to abut against the pipe wall. The plurality of first drive motors (35) are respectively spaced at the plurality of first mounting slots. The end of the plurality of first drive motors (35) away from the mounting cylinder (31) is used to abut against the pipe wall.

6. The magnetic pipe intelligent sealing device according to claim 1, characterized in that, The sealing airbag assembly (5) includes an airbag bracket (51), an airbag (52), a valve body assembly (53), and a compressed air tank assembly (54). The airbag bracket (51) is disposed on the sealing section (2), the airbag (52) is disposed on the airbag bracket (51), the valve body assembly (53) is disposed on the airbag (52), and the compressed air tank assembly (54) is disposed on the airbag bracket (51). The compressed air tank assembly (54), the valve body assembly (53), and the airbag (52) are connected in sequence. The valve body assembly (53) enables the airbag (52) to be connected to or disconnected from the air tank assembly (54).

7. The magnetic pipe intelligent sealing device according to claim 6, characterized in that, The valve body assembly (53) is a three-way valve and also includes a one-way valve (55). The three-way valve is connected to the air bag (52), the compressed air tank assembly (54) and the one-way valve (55) respectively. The three-way valve can connect the compressed air tank assembly (54) to the air bag (52) or the three-way valve can connect the air bag (52) to the one-way valve (55).

8. The magnetic pipe intelligent sealing device according to claim 1, characterized in that, The magnetic adsorption section (1) includes a cylindrical assembly (11), a steel brush assembly (12), a valve assembly (13), a second outer ring sealing assembly (14), and a magnetic induction device. The steel brush assembly (12) is sleeved on the cylindrical assembly (11), and the second outer ring sealing assembly (14) is sleeved on the cylindrical assembly (11). The cylindrical assembly (11) is provided with the drain hole (101). The valve assembly (13) is disposed on the cylindrical assembly (11) and can open or close the drain hole (101). The magnetic induction device is disposed on the cylindrical assembly (11) or the steel brush assembly (12) and is used to sense the magnetic field of the magnetic component (4). The cylindrical assembly (11) is connected to the connecting section (2).

9. A magnetic pipe sealing system, characterized in that, The magnetic pipe intelligent sealing system includes: The magnetic pipe intelligent sealing device according to any one of claims 1 to 8; Pipeline (200), the pipeline (200) is provided with a flow channel, and the magnetic intelligent pipe sealing device is located inside the pipeline (200) and can move or be fixed inside the pipeline (200); The magnetic component (4) is disposed on the pipe (200); A controller is used to send control information to the occlusion airbag assembly (5).

10. A method for live pipeline repair and replacement, applied to the magnetic intelligent pipeline sealing system as described in claim 9, characterized in that, The pipeline live repair and pipe replacement method includes the following steps: Delineate the area (200) of pipe that needs to be replaced and mark this area as the replacement area; Bypass branch pipe holes are opened upstream and downstream of the replacement area, and the upstream and downstream are connected by branch pipes. Install a magnetic component (4) downstream of the replacement area, insert a magnetic adsorption section (1), and the magnetic adsorption section (1) is driven to move by the fluid in the pipe (200). The magnetic adsorption section (1) drives the sealing section (3) and the sealing airbag assembly (5) to move to the downstream of the replacement area in the pipe (200). When the magnetic adsorption section (1) senses the magnetic component (4), the drain hole (101) is opened, the magnetic adsorption section (1) decelerates and is fixed in the pipe (200) by the magnetic component (4). Install a magnetic component (4) upstream of the replacement area, and place another magnetic adsorption section (1) in. The magnetic adsorption section (1) is driven to move by the fluid in the pipe (200). The magnetic adsorption section (1) drives the sealing section (3) and the sealing airbag assembly (5) to move to the upstream of the replacement area in the pipe (200). When the magnetic adsorption section (1) senses the magnetic component (4), the drain hole (101) is opened. The magnetic adsorption section (1) decelerates and is fixed in the pipe (200) by the magnetic component (4). Open the sealing airbag assembly (5) in the upstream and downstream areas to seal the replacement area of ​​the sealing pipeline (200); The upstream magnetic component (4) and the downstream magnetic component (4) are located inside the bypass branch holes of the upstream and downstream pipes, respectively.

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