Air bag type plugging method and plugging device for pipeline pressure tapping

Abstract

The invention discloses an air bag type plugging method and a plugging device for pipeline pressure tapping, belongs to the technical field of pipeline plugging, and aims to solve the technical problems of complicated operation, unstable plugging effect, limited application range and the like of the conventional pipeline pressure plugging device. The high-strength and high-elasticity sealing air bag is adopted as a plugging core component, the sealing air bag is tightly attached to the inner wall of the pipeline through inflation expansion, and an effective sealing barrier is formed; meanwhile, an umbrella type reinforcing device is installed in the sealing air bag, and the plugging effect is further enhanced through unfolding and folding of a supporting sliding ring and a supporting frame; an integrated control system realizes automation and intelligentization of operation, and manual intervention is reduced; the inner wall of the pipeline is cleaned before installation, and the sealing effect is ensured; in addition, a folding angle brace joint structure is introduced to adapt to narrow pipeline space operation; the plugging effect, the operation efficiency and the safety are remarkably improved, and the plugging device is suitable for pipelines made of various materials and media and has wide application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline inspection and maintenance, and in particular to an airbag-type plugging method and a plugging device for a pressure-opening hole in a pipeline. Background Art

[0002] In the field of pipeline engineering, especially in pipeline systems transporting fluids such as liquids and gases, pipeline inspection and maintenance are critical to ensuring safe and stable operation. Traditional pipeline inspection and maintenance methods often require stopping the flow of fluids within the pipeline to allow for operations such as drilling holes, repairs, or equipment replacement. However, this approach not only leads to production interruptions and financial losses, but also wastes significant energy. This drawback is particularly pronounced in situations where frequent inspections or prolonged outages are necessary.

[0003] To overcome the shortcomings of traditional pipeline shutdown construction methods, hot-dip tapping technology has emerged. This technology utilizes specialized hot-dip tapping equipment to create holes in the pipeline wall while maintaining stable fluid pressure within the pipeline. This technology addresses requirements such as adding branch lines, installing additional instrumentation probes, and repairing and replacing equipment. Hot-dip tapping technology avoids the production interruptions and energy waste associated with traditional pipeline shutdown construction methods, significantly improving the safety and economic efficiency of pipeline operations.

[0004] However, during the process of pipeline pressure tapping, especially when switching pipelines for maintenance work on existing pipelines, it is necessary to seal both ends of the maintenance pipeline to ensure that the repair work can be carried out while the pipeline continues to operate. Currently, there are many pipeline sealing technologies on the market, but most of them have problems such as poor sealing effect, complex operation, and limited scope of application. For example, some traditional sealing methods may not be able to adapt to the sealing needs of pipelines of different materials, different diameters, and different media, resulting in loose sealing and the risk of leakage; or the sealing device has a complex structure and is inconvenient to operate, which increases the difficulty and cost of construction.

[0005] For example, CN118640351A discloses a pressure-sealing device for pipes. While this device achieves sealing of the main pipe through the cooperation of a sealing cup and a sealing airbag, it still relies on the deflation of the sealing airbag to balance the pressure when the sealing head is lifted, which increases the complexity of operation. Furthermore, the device requires the installation of branch pipes and multiple tee fittings on the pipeline, resulting in a complex pipeline structure and increasing the risk of leakage. Furthermore, its adaptability to pipes of different materials, diameters, and media needs to be improved. In particular, the sealing effect may be affected in environments with high temperature, high pressure, or corrosive media.

[0006] Another example is CN219345874U, a balloon sealing device for pressurized pipelines. The device achieves the placement and removal of the balloon through the cooperation of a movable rod and a combined cover. Although it achieves zero leakage of the medium, the balloon may wear due to rotation when entering and exiting the pipeline, affecting the reuse rate. In addition, although the setting of the pressure sensor can monitor the sealing effect, its accuracy is disturbed in complex pipeline systems. The overall structure of the device is relatively complex, and the operator's skills are required to be high. The cost is relatively high, which limits its popularity in large-scale applications.

[0007] Another example is the CN220102484U self-contained bypass pipe non-stop pressure opening plugging cylinder type sealing equipment. This equipment achieves non-stop gas pipeline plugging by setting a temporary bypass pipe. At the same time, it uses a plugging cylinder and a plugging rubber plate to seal the pipeline to be repaired. Its sealing effect is easily affected by impurities and deformation in the pipeline, and the overall cost of the equipment is relatively high. In addition, it has limited adaptability to pipelines with small diameters or complex pipe conditions.

[0008] Therefore, developing a highly efficient, reliable, widely applicable, and easy-to-operate pipeline pressure-opening sealing technology and device has become an urgent problem to be solved in the current pipeline engineering field. The airbag-type pipeline pressure-opening sealing method and device provided by the present invention is an innovative solution to the above-mentioned problems existing in the prior art. By utilizing the synergistic effect of a sealing airbag and an umbrella-type reinforcement device, the device can reliably seal the pipeline under pressure, ensuring that repair work can be carried out while the pipeline continues to operate. This overcomes the shortcomings of traditional sealing technology and has significant technical advantages and application prospects. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide an airbag sealing method and a sealing device for pressurized pipeline opening, so as to solve the technical difficulties existing in the pressurized pipeline opening and sealing operations, especially to achieve efficient and reliable sealing of the pipeline under the premise of maintaining the stability of the fluid pressure in the pipeline, so as to carry out subsequent maintenance, replacement or addition of branch pipelines and other operations, and overcome the technical limitations of the existing technology that the pressurized pipeline sealing device often has the problems of complex operation, unstable sealing effect, limited scope of application, etc., especially when dealing with pipelines of different materials, diameters and media, the sealing effect is often difficult to guarantee.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is: The air bag type plugging method for a pipeline pressure opening comprises the following steps: Step 1: Drill holes on both sides of the pipeline to be repaired, set up and connect the bypass pipeline; Step 2: Open inspection holes on the pipes connecting the bypass pipes on both sides of the inspection area of the pipeline to be inspected; Step 3: Install the plugging device in the manhole to block both ends of the maintenance area of the pipeline to be repaired. Before installation, clean the inner walls of the pipeline on both sides of the maintenance area to remove impurities, oil stains and rust on the inner walls of the pipeline to ensure that the sealing airbag of the plugging device can fit tightly with the inner wall of the pipeline to improve the sealing effect. Step 4: Cut and remove the pipes in the area to be repaired; Step 5: Install the replacement pipe and test it; Step 6: Remove the plugging device, repair the manhole and test it to be qualified; Step 7: Remove the bypass pipe and seal the opening connected to the bypass pipe.

[0011] In a preferred solution, the specific steps of installing the blocking device in Step 3 include: Step 3.1: Use the control motor of the control device to drive the driving rod to push the sealing airbag and the umbrella-type reinforcement device forward to the corner of the T-shaped pipe at the inspection hole; Step 3.2: By continuously pushing the driving rod forward, the ear seat rotates in the hinge seat, driving the umbrella-type reinforcement device to flip 90 degrees and enter the pipeline to be inspected horizontally; Step 3.3: Inflate the sealed airbag through the air pump of the auxiliary device to expand the airbag; Step 3.4: The propulsion device pushes the support slip ring of the umbrella-type reinforcement device to expand the umbrella-type reinforcement device and strengthen the airtightness of the sealed airbag.

[0012] In a preferred solution, the specific steps of removing the blocking device in Step 6 include: Step 6.1: After the plugging operation is completed, the gas in the sealing airbag is discharged through the auxiliary device; Step 6.2: The propulsion device pulls the support slip ring of the umbrella reinforcement device back to retract the umbrella reinforcement device; Step 6.3: The control motor of the control device drives the driving rod to retract, driving the sealing airbag and the umbrella-type reinforcement device to retreat to the corner of the T-shaped pipe at the inspection hole; Step 6.4: The spring drives the stacked angle bracing joint structure to straighten, driving the umbrella-type reinforcement device and the driving rod to be straight; Step 6.5: The control motor of the control device continues to drive the driving rod to retract until it exits the inspection hole.

[0013] In the preferred solution, in Step 6, when repairing the inspection hole, welding repair is performed using repair materials of the same material as the pipeline to be repaired. After welding is completed, non-destructive testing is performed on the repaired part to ensure the quality of the repair. A water pressure test or an air pressure test is used during the test. The test pressure is 1.5 times the working pressure of the pipeline, and the pressure holding time is not less than 30 minutes. If there is no leakage, the test is determined to be qualified.

[0014] The air bag type plugging device for pipeline pressure opening includes: 1. Sealing airbag: It expands and seals the pipeline after inflation. It is made of high-strength and high-elasticity materials to ensure that it can fit tightly against the inner wall of the pipeline after inflation to form a reliable sealing barrier.

[0015] 2. Umbrella reinforcement device: Installed in the sealed airbag, it is pushed forward by the control device connected to it, and the propulsion device expands it and reinforces the sealed airbag to ensure the airtightness of the pipeline. The specific structure includes: (1) Support column: centrally set, with the support slip ring slidingly installed on the support column; (2) Support slip ring: installed on the support column, driving several support frames to expand and contract; (3) Support frame: connected to the blocking support block. When the support slip ring moves, the support frame will expand or contract accordingly. (4) Sealing support block: Made of solid rubber, the sealing support block is also densely equipped with a sealing rubber ring. When it is propped up, the sealing airbag is tightly combined with the pipeline to enhance the sealing effect; 3. Propulsion device: Slidingly installed on the support column and installed at the rear end of the support slip ring, it pushes the support slip ring to move under the control of the control device to open and close the umbrella-type reinforcement device.

[0016] 4. Auxiliary device: It is an air pump that inflates and deflates the sealed airbag through the air inflation tube to ensure that the sealed airbag can expand or contract as needed.

[0017] 5. Control System: The control device, propulsion device, and auxiliary device are connected to a control system that controls their opening, closing, and movement. The control device is equipped with a control motor that controls the extension and retraction of the drive rod, pushing the umbrella-shaped reinforcement device and sealing airbag forward to the pipeline under inspection area to seal the pipeline. The propulsion device is an electric push rod, and its output end is fixedly connected to the support slip ring.

[0018] 6. Connection Structure: The umbrella-style reinforcement device and the control device are connected via a drive rod. One end of the drive rod is connected to the control device, and the other end is connected to the reinforcement device's support column via a folding gusset joint structure. The folding gusset joint structure includes a hinge seat connected to the end of the drive rod. The end of the support column is mounted with an ear seat. The hinge seat and the ear seat are connected together by a hinge shaft and a spring. The hinge seat includes a base plate with a set of ear plates mounted flat on the base plate. A side plate is mounted on one side. A spring is fixed to the side plate and its other end is connected to the ear seat.

[0019] In the preferred solution, a pressure sensor and a flow sensor are provided on the inflation tube. The pressure sensor is used to monitor the inflation pressure in the sealed airbag in real time and transmit the pressure signal to the control system. When the pressure reaches the preset sealing pressure value, the control system controls the auxiliary device to stop inflation; the flow sensor is used to monitor the gas flow in the inflation tube, so that the control system can judge whether the inflation state of the sealed airbag is normal based on the gas flow. If the flow is abnormal, the control system will issue an alarm signal.

[0020] In a preferred solution, the blocking device is applicable to pipelines of various materials, including steel pipes, cast iron pipes, plastic pipes, etc., as well as pipelines for conveying media such as water, oil, and gas.

[0021] The airbag-type plugging method and device for pressurized pipeline openings provided by the present invention have the following beneficial effects: 1. The present invention solves the technical difficulties in the operation of opening and plugging a pipeline under pressure, especially achieving efficient and reliable plugging of the pipeline while maintaining the stability of the fluid pressure in the pipeline.

[0022] 2. The present invention adopts a high-strength, high-elasticity sealing airbag and an umbrella-type reinforcement device. Through inflation and the expansion and contraction of the support slip ring and support frame, it ensures the close fit between the sealing airbag and the inner wall of the pipeline, thereby improving the sealing effect and reliability.

[0023] 3. The present invention overcomes the problems of the existing pipeline pressure plugging device, such as complex operation, unstable plugging effect, and limited scope of application, especially the difficulty in ensuring the plugging effect when dealing with pipelines of different materials, diameters and media.

[0024] 4. The present invention connects the control device, propulsion device and auxiliary device to a control system to achieve automated and intelligent operation, reduce manual intervention, improve work efficiency and safety, simplify the operation process, reduce the requirements for operator skills, adapt to narrow pipeline space, and improve the success rate and efficiency of plugging: 5. The present invention introduces a folding angle brace joint structure into the sealing device, and adopts a combination of a hinge seat, an ear seat, a hinge shaft and a spring to achieve flexible connection and angle adjustment between the umbrella-type reinforcement device and the driving rod, adapting to operation in narrow pipeline spaces.

[0025] 6. The integrated design of structure and function of the present invention facilitates recycling, enables the umbrella-type reinforcement device to operate flexibly in a limited space, breaks through the technical bottleneck, and improves the success rate and efficiency of plugging.

[0026] 7. The innovative design of the folding gusset joint structure of the present invention realizes smooth transition and automatic reset through the combination of hinge and spring, thus enhancing the reliability and stability of the device.

[0027] 8. The present invention ensures the plugging effect and long-term stable operation of the pipeline system by optimizing the operating process, introducing automated and intelligent equipment, and strict testing and repair procedures.

[0028] 9. The present invention is applicable to pipelines of various materials and pipelines conveying different media, and has broad application prospects. Its versatility and adaptability make this solution highly competitive in the field of pipeline blocking.

[0029] 10. The combination of the inflation of the sealing airbag and the expansion and reinforcement of the umbrella-type reinforcement device of the present invention effectively blocks the flow of the medium in the pipeline, forming a relatively independent and closed space, and providing a safe and stable environment for subsequent operations such as opening and welding.

[0030] 11. The present invention realizes the automation and intelligence of the plugging process through the precise control of the control system, further improves the operation efficiency and safety, reduces the operation difficulty and cost, and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a working schematic diagram of the plugging method of the present invention; Figure 2 This is a schematic diagram of the umbrella-type reinforcement device of the blocking device of the present invention in an unexpanded state; Figure 3 A schematic diagram of the umbrella-type reinforcement device of the blocking device of the present invention in an expanded state; Figure 4 A schematic diagram of the sealing airbag of the occlusion device of the present invention in an uninflated state; Figure 5 A schematic structural diagram of an umbrella-type reinforcement device for a blocking device according to the present invention; Figure 6 This is a schematic structural diagram of the folded gusset joint structure of the blocking device of the present invention; Figure 7 This is a front view of the hinge seat of the sealing device of the present invention; Figure 8 It is a side view of the hinge seat of the blocking device of the present invention; In the figure: sealing airbag 1, umbrella-type reinforcement device 2, control device 3, propulsion device 4, auxiliary device 5, inflation tube 6, drive rod 7, folding angle brace joint structure 8, pipeline to be inspected 9, bypass pipeline 10, inspection hole 11, blocking device 12, replacement pipeline 13, support column 201, support slip ring 202, support frame 203, blocking support block 204, sealing rubber ring 205, hinge seat 801, ear seat 802, hinge shaft 803, spring 804, bottom plate 8011, ear plate 8012, side baffle 8013. DETAILED DESCRIPTION

[0032] The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments: Example 1 like Figures 1 to 8 As shown, this embodiment describes in detail a pipeline pressure opening airbag sealing device, which mainly consists of the following key parts: a sealing airbag 1, an umbrella-type reinforcement device 2, a control device 3, a propulsion device 4, an auxiliary device 5 and a comprehensive control system.

[0033] 1. Sealing airbag 1: Material selection: High-strength, high-elasticity synthetic soft rubber material is used. This material has good wear resistance, corrosion resistance and aging resistance, and can maintain a stable sealing effect in various harsh environments; Structural design: The sealing airbag 1 is designed to be elliptical to adapt to pipes of different diameters. It has an inflation chamber inside and is connected to the auxiliary device 5 through the inflation tube 6 to achieve inflation and deflation operations; Surface treatment: The outer surface of the sealing airbag 1 is specially treated, such as coating with an anti-slip coating or adding texture, to enhance the friction with the inner wall of the pipe and improve the stability of the sealing.

[0034] 2. Umbrella type reinforcement device 2: Support column 201: As the core component of the umbrella-type reinforcement device 2, the support column 201 is made of high-strength steel to ensure sufficient rigidity and stability; Support slip ring 202: Slidingly mounted on the support column 201, it slides up and down through the drive of the propulsion device 4. The support slip ring 202 is provided with multiple connection points for connecting to the support frame 203; Support frame 203: Made of lightweight and high-strength alloy material, one end is connected to the support slip ring 202, and the other end is connected to the blocking support block 204. The number and layout of the support frames 203 are optimized according to the pipeline diameter and blocking requirements; Sealing support block 204: Made of solid rubber or highly elastic polymer material, the sealing support block 204 is also densely provided with a sealing rubber ring 205, the shape of which matches the inner wall of the pipe. When the support slip ring 202 moves, the support frame 203 opens or closes accordingly, driving the sealing rubber ring 205 on the sealing support block 204 to fit closely to the inner wall of the pipe, thereby enhancing the sealing effect.

[0035] 3. Control device 3: Control motor: Built into the control device 3 and connected to the umbrella-type reinforcement device 2 via the drive rod 7. The control motor has precise position control and speed regulation functions, ensuring that the sealing airbag 1 and the umbrella-type reinforcement device 2 move accurately and stably to the specified position; Sensor and feedback system: The control device 3 also integrates a variety of sensors, such as pressure sensors, displacement sensors, etc., which are used to monitor key parameters such as the inflation pressure of the sealing airbag 1 and the expansion degree of the umbrella-type reinforcement device 2 in real time. Through the feedback system, the control motor can automatically adjust the extension and retraction of the drive rod 7 according to the sensor data to achieve precise control.

[0036] 4. Propulsion device 4: Electric push rod: As the main component of the propulsion device 4, the electric push rod has the advantages of compact structure, large thrust, and high control accuracy. Its output end is fixedly connected to the support slip ring 202, and the support slip ring 202 slides up and down through the forward and reverse rotation of the motor; Guide mechanism: In order to ensure the stability and accuracy of the support slip ring 202 during the sliding process, the propulsion device 4 is also provided with a guide mechanism, such as a guide rail, a slider, etc., to accurately guide the motion trajectory of the support slip ring 202.

[0037] 5. Auxiliary device 5: Inflator: As the core component of the auxiliary device 5, the inflator has efficient and stable inflation performance. It is connected to the sealed airbag 1 through the inflation tube 6 and can accurately control the inflation pressure and inflation volume according to the instructions of the control system; Safety valve and pressure gauge: To ensure safety during the inflation process, auxiliary device 5 is equipped with a safety valve and pressure gauge. When the pressure inside the sealed airbag 1 exceeds the set value, the safety valve automatically opens to deflate. The pressure gauge displays the inflation pressure in real time, making it easier for the operator to monitor and adjust the pressure.

[0038] 6. Control system: Central Processing Unit (CPU): As the core component of the control system, the CPU is responsible for receiving data signals from various sensors and processing and analyzing them according to preset programs and algorithms. It can issue corresponding control instructions based on the processing results to control the opening and closing and operation of the control device 3, propulsion device 4, and auxiliary device 5; Human-machine interaction interface: In order to facilitate the use and monitoring of operators, the control system is also equipped with a human-machine interaction interface, such as a touch screen, buttons, etc. Through the human-machine interaction interface, operators can intuitively understand the working status, key parameters and other information of the plugging device, and make necessary settings and adjustments.

[0039] 7. Driving rod 7: Structural composition: The drive rod 7 is a rigid rod made of high-strength steel or alloy to ensure stability and reliability in force transmission and movement. Its length can be adjusted according to actual needs to accommodate pipe plugging operations of different diameters and depths. Connection method: One end of the driving rod 7 is connected to the driving component control motor in the control device 3, and the other end is connected to the support slip ring 202 of the umbrella-type reinforcement device 2 through a folding gusset joint structure 8. This connection method enables the driving rod 7 to accurately transmit the driving force generated by the control device 3, pushing the umbrella-type reinforcement device 2 to expand or close; Function: The driving rod 7 plays a key transmission role in the blocking process. It can convert the linear motion generated by the control device 3 into the expansion or contraction action of the umbrella-type reinforcement device 2, thereby achieving effective reinforcement and support for the sealing airbag 1.

[0040] 8. Folding gusset joint structure 8: Structural design: The folding gusset joint structure 8 is composed of multiple foldable gusset plates, which are connected together by hinges or pins to form a flexibly rotatable joint structure. When the movable rod 7 is acted upon by a driving force, the folding gusset joint structure 8 can expand or fold with the movement of the movable rod 7, thereby driving the support sliding ring 202 of the umbrella-type reinforcement device 2 to slide up and down; Material selection: The gussets are made of high-strength, lightweight alloy to ensure the rigidity and stability of the joint structure while reducing the weight of the entire occlusion device. Connecting components such as hinges and pins are made of wear-resistant and corrosion-resistant materials to ensure the long-term stable operation of the joint structure. Function: The folding angle brace joint structure 8 plays a key transmission and support role in the sealing process. It can convert the linear movement of the movable rod 7 into the opening or closing action of the umbrella-type reinforcement device 2, and can maintain the stability and reliability of the joint structure during the movement. In addition, the folding angle brace joint structure 8 also has a certain adaptive ability, and can be fine-tuned according to the shape and curvature of the inner wall of the pipeline to ensure that the sealing support block 204 fits tightly with the inner wall of the pipeline.

[0041] The umbrella-type reinforcement device 2 and the folding angle brace joint structure 8 in this embodiment are significantly innovative compared with the existing technology; the umbrella-type reinforcement device 2 achieves effective reinforcement of the sealing airbag 1 and improves the sealing effect through the coordinated action of the support column 201, the support slip ring 202, the support frame 203, the blocking support block 204 and the sealing rubber ring 205; the folding angle brace joint structure 8 achieves the folding and straightening of the umbrella-type reinforcement device 2 through the coordinated action of the hinge seat 801, the ear seat 802, the hinge shaft 803 and the spring 804, thereby improving the applicability of the device; in addition, the introduction of the control system makes it possible to automate and intelligentize the blocking process, further improving the working efficiency and safety.

[0042] Example 2 In another preferred embodiment, based on the above embodiment 1, a method for sealing a pipeline using the pipeline pressure-opening airbag sealing device of embodiment 1 includes the following steps: 1. Hole preparation Position selection: Conduct a comprehensive survey of the pipeline 9 to be inspected and select appropriate opening locations on both sides of the pipeline based on the pipeline direction, medium pressure, flow rate, and inspection requirements. Ensure that the opening locations avoid stress concentration areas such as pipeline welds and elbows, and facilitate the subsequent connection of the bypass pipeline 10. Equipment preparation: Use a dedicated pipe drilling machine to check the equipment status to ensure that the tool is sharp and the power system is stable. At the same time, prepare the bypass pipe 10 and its connectors to ensure that the specifications match the pipe 9 to be repaired; Drilling: Use a drilling machine to drill holes precisely at the selected location. During the drilling process, the drilling speed and depth must be strictly controlled to avoid unnecessary damage to the pipeline. After drilling is completed, clean the burrs and debris around the hole. Setting of bypass pipe 10: Connect the bypass pipe 10 to the opening by flange or welding to ensure that the connection is tight and leak-free. The diameter and material of the bypass pipe 10 should be selected according to the flow and pressure of the medium in the pipeline to ensure that the medium can flow smoothly during maintenance.

[0043] 2. Open a manhole Position determination: On both sides of the pipeline 9 to be repaired and connected to the bypass line 10, determine the position and size of the manhole 11 according to the repair requirements and the size of the plugging device 12; Drilling operation: Use a special cutting tool or drilling machine to open an inspection hole 11 on the pipeline. During the drilling process, the pipeline must be kept stable to avoid damage to the pipeline caused by vibration. After the drilling is completed, the hole mouth is polished to ensure a smooth surface without burrs.

[0044] 3. Cleaning Cleaner selection: Choose the appropriate cleaner based on the type and material of dirt on the inner wall of the pipe. The cleaner should have good decontamination ability and no corrosive effect on the pipe material. Cleaning: Use a high-pressure water gun or a special cleaning brush to thoroughly clean the inner walls of the pipeline 9 on both sides of the inspection area. During the cleaning process, ensure that the cleaning agent fully contacts the inner wall of the pipeline to remove impurities, oil, and rust. After cleaning, wipe away moisture and residue on the inner wall of the pipeline with a clean cloth or sponge.

[0045] 4. Install the blocking device Device inspection: Before installation, conduct a comprehensive inspection of the blocking device 12 to ensure that the sealing airbag 1, umbrella-type reinforcement device 2, control device 3, propulsion device 4, auxiliary device 5 and other components are intact and securely connected; Installation and positioning: Slowly place the plugging device 12 into the pipeline 9 to be repaired through the inspection hole 11, and adjust its position so that it is aligned with both ends of the area to be repaired. Use special positioning tools or marks to ensure that the plugging device 12 is installed accurately; Sealing airbag 1 fits: The position of the sealing airbag 1 is fine-tuned by the control device 3 so that it initially fits against the inner wall of the pipe. At this point, a preliminary inflation test can be performed to check the sealing performance of the sealing airbag 1.

[0046] 5. Gas sealing Inflation preparation: Check the air pump, air pipe 6 and other components in the auxiliary device 5 to ensure that the connection is tight and there is no leakage. According to the medium pressure in the pipeline and the pipeline material, pipe diameter and other factors, comprehensively determine the inflation pressure range of the sealing airbag 1; Inflation operation: Start the air pump and inflate the sealing airbag 1 through the inflation tube 6. During the inflation process, pay close attention to the changes in the pressure gauge to ensure that the inflation pressure gradually rises within the preset range. When the sealing airbag 1 expands to fit tightly against the inner wall of the pipe, stop inflation and turn off the air pump. The umbrella-type reinforcement device 2 is expanded: the propulsion device 4 is started at the same time, and the support slip ring 202 of the umbrella-type reinforcement device 2 is pushed to slide upward through the transmission action of the moving rod 7 and the folding angle support joint structure 8. As the support slip ring 202 moves, the support frame 203 gradually expands and drives the sealing rubber ring 205 on the blocking support block 204 to fit tightly against the inner wall of the pipeline. During the reinforcement process, real-time monitoring of the control system must be maintained to ensure that the umbrella-type reinforcement device 2 is expanded in place and is stable and reliable.

[0047] 6. Cutting and replacement Cutting preparation: After confirming that the blocking device 12 has stably blocked the pipe, prepare the cutting tool and replace the pipe 13, check the condition of the cutting tool and the sharpness of the cutting blade to ensure that the cutting operation proceeds smoothly; Cutting operation: Use cutting tools to cut and remove the area to be repaired of the pipeline 9 to be repaired. During the cutting process, the cutting speed and force should be kept stable to avoid unnecessary damage to the pipeline. After the cutting is completed, the debris and burrs on the cut surface should be cleaned; Installation of replacement pipe 13: Install the replacement pipe 13 to the cutting position and connect it to the original pipe by flange or welding. During the connection process, ensure that the connection is tight and leak-free, and perform necessary sealing treatment on the connection; Test verification: After the installation is completed, the entire piping system is fully tested and inspected, including pressure testing and leak detection, to confirm that the replacement pipe 13 is installed correctly and the piping system is operating normally before proceeding to the next step.

[0048] 7. Recovery and testing Removing the blocking device 12: The control system operates the control device 3 and the propulsion device 4 in reverse, causing the drive rod 7 to retract and drive the umbrella-type reinforcement device 2 to collapse. At the same time, the auxiliary device 5 releases the pressure in the sealing airbag 1 to restore it to its initial state. The blocking device 12 is then carefully removed from the inspection hole 11 and cleaned and inspected. Repair of manhole 11: Repair the manhole 11, such as filling with sealing materials, polishing and smoothing. During the repair process, ensure that the sealing material is compatible with the pipe material and has good sealing performance; System test: After the repair is completed, the entire pipeline system is tested and inspected again. Only after confirming that the manhole 11 is repaired intact and there is no leakage in the pipeline system can the bypass pipeline 10 be removed and plugged; Sealing: Use special sealing materials or equipment to seal the openings. During the sealing process, ensure that the sealing materials are tightly combined with the pipe material and the sealing effect is good. After the sealing is completed, conduct a final comprehensive inspection of the entire pipe system and it can only be put into use after confirmation.

[0049] 8. Definition of process conditions Inflation pressure: The inflation pressure of the sealing airbag 1 needs to be determined based on factors such as the medium pressure in the pipeline, pipeline material, pipe diameter and sealing requirements. Under normal circumstances, the inflation pressure is controlled between 0.5~2.0MPa; for high-pressure pipelines or pipelines made of special materials, special calculations and tests are required to determine the appropriate inflation pressure.

[0050] Plugging time: The plugging time should be determined according to the specific needs of the maintenance work. During the plugging period, it is necessary to ensure that the flow of the medium in the pipeline is effectively blocked and that the plugging device 12 maintains a stable and reliable plugging state. If the plugging time needs to be extended, the plugging device 12 needs to be regularly inspected and maintained to ensure that its performance is not affected.

[0051] Temperature range: This method is applicable to environments ranging from room temperature to high temperature; however, the temperature resistance of the materials of the sealing airbag 1 and the umbrella-type reinforcement device 2 must be considered during specific implementation; for operations in high-temperature environments, high-temperature resistant materials must be selected and corresponding insulation measures must be taken to ensure that the sealing device 12 operates normally and has stable performance within the operating temperature range; at the same time, safety protection and monitoring of operators must be strengthened when operating in high-temperature environments.

[0052] Example 3 In another preferred embodiment, based on the above embodiments 1 and 2, this embodiment provides an airbag-type plugging method for a pressurized opening in a pipeline, and the implementation steps are as follows: Step 1: Drill holes on both sides of the pipeline to be repaired 9, set up and connect the bypass pipeline 10 Pipeline survey and positioning: Conduct a comprehensive survey of the pipeline to be inspected to determine parameters such as pipeline direction, medium pressure, flow rate, etc. Based on the inspection requirements, select appropriate opening locations on both sides of the pipeline, avoiding stress concentration areas such as pipeline welds and elbows; Drilling: Use a dedicated pipe drilling machine to accurately drill holes at the selected locations. During the drilling process, the drilling speed and depth must be strictly controlled to avoid unnecessary damage to the pipeline. Setting of bypass pipe 10: Connect the bypass pipe 10 to the opening by flange or welding to ensure that the connection is tight and leak-free. The diameter and material of the bypass pipe 10 should be selected according to the flow and pressure of the medium in the pipeline to ensure that the medium can flow smoothly during maintenance.

[0053] Step 2: Open a manhole 11 on the pipeline connecting the bypass pipeline 10 on both sides of the pipeline 9 to be repaired. Determine the position of the manhole 11: Determine the position and size of the manhole 11 on the pipeline connecting the bypass line 10 according to the maintenance requirements and the size of the plugging device 12; Drilling operation: Use a special cutting tool or drilling machine to open an inspection hole 11 on the pipeline. During the drilling process, the pipeline must be kept stable to avoid damage to the pipeline caused by vibration. After the drilling is completed, the hole mouth is polished to ensure a smooth surface without burrs.

[0054] Step 3: Install the blocking device 12 in the inspection hole 11 to block both ends of the inspection area of the pipeline 9 to be inspected. Cleaning the inner wall of the pipeline: Before installing the plugging device 12, clean the inner wall of the pipeline 9 on both sides of the maintenance area. Use a high-pressure water gun or a special cleaning brush to remove impurities, oil stains, and rust on the inner wall of the pipeline. After cleaning, wipe off the moisture and residue on the inner wall of the pipeline with a clean cloth or sponge. Preparation of the blocking device 12: Check the integrity of the blocking device 12, including the sealing airbag 1, control device, inflation pipe and other components. Ensure that the blocking device 12 is not damaged and functions normally; Installation of the plugging device 12: Slowly place the plugging device 12 into the pipeline 9 to be repaired through the inspection hole 11, and adjust its position so that it is aligned with both ends of the area to be repaired. Use a dedicated positioning tool or mark to ensure that the plugging device 12 is installed accurately; Inflation and sealing: Inflate the sealing airbag 1 through the control device to make it expand and fit tightly against the inner wall of the pipe. During the inflation process, pay close attention to the changes in the pressure gauge to ensure that the inflation pressure is within a safe range. When the sealing airbag 1 is fully inflated and blocks the pipe, stop inflation.

[0055] Step 4: Cut and remove the pipes in the area to be repaired 9 Cutting preparation: After confirming that the blocking device 12 has stably blocked the pipeline, prepare the cutting tools and necessary protective measures; Cutting operation: Use cutting tools to cut and remove the pipeline to be repaired 9 in the area to be repaired. During the cutting process, the cutting speed and force should be kept stable to avoid unnecessary damage to the pipeline. After the cutting is completed, the debris and burrs on the cut surface should be cleaned.

[0056] Step 5: Install the replacement pipe 13 and test it Preparation of replacement pipe 13: Prepare appropriate replacement pipe 13 according to the size and material of the cut pipe, and check the integrity and quality of the replacement pipe 13 to ensure that it meets the use requirements; Installation of replacement pipe 13: Install the replacement pipe 13 to the cut position and connect it to the original pipe by flange or welding. During the connection process, ensure that the connection is tight and leak-free, and perform necessary sealing treatment on the connection; System testing: After installation is complete, conduct a comprehensive test and inspection of the entire piping system, including pressure testing, leak detection, etc. Only after confirming that the replacement pipe 13 is installed correctly and the piping system is operating normally can the next step be carried out.

[0057] Step 6: Remove the blocking device 12, repair the manhole 11 and test it to be qualified Removal of the blocking device 12: Release the pressure in the sealing airbag 1 through the auxiliary device 5 to restore it to its initial state, then carefully remove the blocking device 12 from the inspection hole 11, and clean and inspect it; Repair of manhole 11: Repair the manhole 11, such as filling with sealing materials, polishing and smoothing. During the repair process, ensure that the sealing material is compatible with the pipe material and has good sealing performance; Re-test: After the repair is completed, the entire pipeline system is tested and inspected again. Only after confirming that the inspection hole 11 is repaired intact and there is no leakage in the pipeline system can the next step be carried out.

[0058] Step 7: Remove the bypass pipe 10 and seal the opening connected to the bypass pipe 10 Remove the bypass pipe 10: After confirming that the pipeline system has resumed normal operation, carefully remove the bypass pipe 10, clean it and inspect it; Opening plugging: Use special plugging materials or equipment to plug the opening connected to the bypass pipe 10. During the plugging process, it is necessary to ensure that the plugging material is tightly combined with the pipe material and the plugging effect is good; Final inspection: After the plugging is completed, the entire pipeline system is inspected for the last time and can only be put into use after confirmation that everything is correct.

[0059] The airbag-type sealing method for opening a hole under pressure in a pipeline provided in this embodiment realizes safe inspection and replacement of the pipeline under pressure through precise opening, sealing and cutting operations. This method has the advantages of simple operation, good sealing effect and high safety, and can be widely used in the maintenance of pipeline systems in the fields of petroleum, chemical industry, natural gas, etc.

[0060] In the preferred solution, in the Step 3, before installing the plugging device 12, the inner walls of the pipeline on both sides of the area to be inspected of the pipeline 9 to be inspected are first cleaned to remove impurities, oil stains and rust on the inner walls of the pipeline to ensure that the sealing airbag 1 of the plugging device 12 can fit tightly with the inner wall of the pipeline to improve the sealing effect; the above settings further ensure the safety and reliability of the maintenance operation. At the same time, after cleaning, the size of the area to be inspected must be measured to ensure that the size of the plugging device 12 matches the area to be inspected, thereby avoiding problems during the installation process and improving the overall maintenance efficiency.

[0061] In the preferred solution, a support column 201 is provided at the center of the umbrella-type reinforcement device 2, and a support slip ring 202 is slidably installed on the support column 201. Several support frames 203 are installed on the support slip ring 202. The support frames 203 are connected to the blocking support blocks 204. The support slip ring 202 drives the support frames 203 to expand and contract. When expanded, the blocking support blocks 204 tightly combine the sealing airbag 1 with the pipe 4. The above arrangement effectively enhances the stability and sealing of the sealing airbag 1 in the pipe 4. At the same time, the height of the support column 201 is adjustable, so that the umbrella-type reinforcement device 2 can adapt to pipes of different diameters, thereby improving the versatility and practicality of the device.

[0062] In the preferred solution, a propulsion device 4 is slidably installed on the support column 201, and the propulsion device 4 is installed at the rear end of the support slip ring 202. Under the control of the control device, the support slip ring 202 is pushed to move, and the umbrella-type reinforcement device 2 is opened and closed. The above setting enables the umbrella-type reinforcement device 2 to flexibly adjust the opening degree, adapt to pipes or structures of different diameters, enhance stability and applicability, and at the same time, through the precise control of the propulsion device 4, efficient and safe reinforcement operations are achieved.

[0063] In the preferred solution, the blocking support block 204 is made of solid rubber, and the blocking support block 204 is also densely provided with a sealing rubber ring 205; the above arrangement enables the blocking support block 204 to have good elasticity and wear resistance, and can effectively buffer when squeezed by external force. The densely provided sealing rubber ring 205 fits tightly to the blocking position, thereby improving the blocking effect and extending the service life of the blocking support block.

[0064] In the preferred solution, the umbrella-type reinforcement device 2 is connected to the control device 3 through a driving rod 7, one end of the driving rod 7 is connected to the control device 3 and the other end is connected to the support column 201 of the reinforcement device 2 through a folding angle support joint structure 8; the above arrangement ensures that the control device 3 can flexibly control the expansion and contraction of the reinforcement device 2, and the folding angle support joint structure 8 not only enhances the stability of the connection, but also facilitates the adjustment of the angle to adapt to different terrains and needs, thereby improving the stability and adaptability of the overall structure.

[0065] In the preferred embodiment, the folding angle support joint structure 8 includes a hinge seat 801, which is connected to the end of the driving rod 7, and an ear seat 802 is installed at the end of the support column 201. The hinge seat 801 and the ear seat 802 are connected together through a hinge shaft 803 and a spring 804; the above arrangement enables the folding angle support joint structure 8 to rotate flexibly under the action of the driving rod 7, and at the same time the spring 804 provides the necessary reset and buffering force to ensure the stability and durability of the structure during the folding and unfolding process.

[0066] In the preferred embodiment, the hinge seat 801 includes a base plate 8011, a group of ear plates 8012 are installed on the plane of the base plate 8011, a side baffle 8013 is installed on one side, the spring 804 is fixed on the side baffle 8013, and the other end is connected to the ear seat 802; the above arrangement makes the hinge seat 801 structure stable and facilitates the installation and positioning of the spring 804. At the same time, the ear plate 8012 cooperates with the ear seat 802 to provide a reliable support point for the connecting parts, thereby enhancing the stability and durability of the overall structure.

[0067] In the preferred solution, a control motor is provided inside the control device 3, which controls the extension and retraction of the driving rod 7 to push the umbrella-type reinforcement device 2 and the sealing airbag 1 forward to the pipeline in the maintenance area of the pipeline 9 to be inspected for sealing; the propulsion device 4 is an electric push rod, and its output end is fixedly connected to the support slip ring 202; the above setting ensures the stable propulsion and precise positioning of the umbrella-type reinforcement device 2 and the sealing airbag 1; at the same time, the support slip ring 202 moves with the output end of the electric push rod, thereby enhancing the stability and adaptability of the entire sealing device in the pipeline, and improving the safety and efficiency of the maintenance operation.

[0068] In the preferred solution, in Step 6, when repairing the manhole 11, welding repair material made of the same material as the pipeline 9 to be repaired is used. After welding, the repaired area is subjected to non-destructive testing to ensure the quality of the repair. The test is performed using a hydraulic pressure test or an air pressure test with a test pressure of 1.5 times the pipeline operating pressure and a pressure holding time of at least 30 minutes. If there is no leakage, the test is considered qualified. The above settings effectively improve the repair strength and sealing of the manhole 11, ensuring the overall safety performance of the pipeline system. At the same time, strict control of the repair process and test results further ensures the stability and reliability of the pipeline in subsequent operation.

[0069] In the preferred embodiment, the inflation tube 6 is provided with a pressure sensor and a flow sensor. The pressure sensor is used to monitor the inflation pressure within the sealed airbag 1 in real time and transmit the pressure signal to the control system. When the pressure reaches the preset blocking pressure value, the control system controls the auxiliary device 5 to stop inflation. The flow sensor is used to monitor the gas flow within the inflation tube 6 so that the control system can determine whether the inflation state of the sealed airbag 1 is normal based on the gas flow. If the flow is abnormal, the control system will issue an alarm signal. The above configuration ensures that the sealed airbag 1 can achieve the desired blocking effect and can promptly detect and handle abnormal conditions during the inflation process, thereby improving the reliability and safety of the system. At the same time, the dual monitoring of pressure and flow provides data support for subsequent maintenance and optimization.

[0070] In the preferred solution, the sealing device 12 is suitable for pipes of various materials, including steel pipes, cast iron pipes, plastic pipes, etc., as well as pipes for transporting media such as water, oil, and gas; the above settings not only improve the versatility and scope of application of the sealing device 12, but also ensure that good sealing performance can be maintained in different media and pipeline environments, effectively preventing medium leakage and meeting diverse pipeline maintenance needs.

[0071] In summary, the airbag-type sealing method and device for pressurized opening of pipelines provided by the present invention effectively solve the technical problems of pressurized opening and sealing of pipelines, realize efficient and reliable sealing, and facilitate subsequent maintenance, replacement or addition of new branch pipelines. In response to the problems of complex operation, unstable sealing, and limited scope of application of the existing technology, the present invention adopts a high-strength, high-elasticity sealing airbag 1 as the core, combined with an internal umbrella-type reinforcement device 2, and enhances the sealing effect by expanding and contracting the support slip ring 202 and the support frame 203. This structure is rare in the existing technology; at the same time, the integrated control system realizes automated and intelligent operation, improving efficiency and safety. The inner wall of the pipeline is cleaned before installation to ensure a close fit and improve the sealing effect. The optimized operation process is efficient and orderly, reducing costs.

[0072] This invention innovatively combines airbag sealing, umbrella reinforcement, integrated control, and process optimization technologies. Through the high-strength sealing airbag 1, umbrella reinforcement device 2, and precise control system, it effectively solves the problem of sealing under pressure, improving operational safety and reliability. The folding gusset joint structure 8, which utilizes a hinge seat 801, an ear seat 802, a hinge shaft 803, and a spring 804, flexibly connects the drive rod 7 and the umbrella reinforcement device 2, adapting to narrow spaces. Its integrated structure and function facilitate recovery, solving operational challenges under space constraints, improving the success rate and efficiency of sealing, and simplifying the operational process.

[0073] In addition, the present invention optimizes the operating process, introduces automated equipment, and significantly improves operating efficiency and quality, ensuring the sealing effect and long-term stable operation of the pipeline system; it is suitable for pipelines of various materials and media, has broad application prospects, and has high market competitiveness.

Claims

1. An airbag-type plugging method for a pressurized opening in a pipeline, characterized in that: The following steps are involved: Step 1: Drill holes on both sides of the pipeline to be repaired (9), and set and connect the bypass pipeline (10); Step 2: Opening a manhole (11) on the pipeline connecting the bypass pipeline (10) on both sides of the maintenance area of the pipeline (9) to be maintained; Step 3: Install a plugging device (12) in the inspection hole (11) to plug both ends of the inspection area of the pipeline (9) to be inspected; Step 4: Cut and remove the pipeline to be repaired (9) in the area to be repaired; Step 5: Install the replacement pipe (13) and test it to ensure it is qualified; Step 6: Remove the plugging device (12), repair the manhole (11) and test it to ensure it is qualified; Step 7: Remove the bypass pipe (10) and seal the opening connected to the bypass pipe (10).

2. The airbag-type plugging method for a pressure-tightened pipeline according to claim 1, characterized in that: In Step 3, before installing the plugging device (12), the inner walls of the pipeline (9) on both sides of the area to be repaired are cleaned to remove impurities, oil stains and rust on the inner walls of the pipeline, so as to ensure that the sealing airbag (1) of the plugging device (12) can fit tightly with the inner wall of the pipeline, thereby improving the plugging effect.

3. An airbag-type plugging device for a pressure-opened pipe, which is a plugging device (12) for implementing the airbag-type plugging method for a pressure-opened pipe according to claim 2, characterized in that: The invention comprises a sealing airbag (1), which expands and blocks the pipeline after being inflated. An umbrella-type reinforcement device (2) is installed in the sealing airbag (1) and is pushed forward by a control device (3) hinged thereto. The propulsion device (4) expands and reinforces the sealing airbag (1) to ensure the airtightness of the pipeline. The auxiliary device (5) is an air pump, which inflates and deflates the sealing airbag (1) through an air inflation pipe (6). The control device (3), the propulsion device (4) and the auxiliary device (5) are connected to a control system, and their opening, closing and movement are controlled by the control system.

4. The airbag-type plugging device for pipeline pressure opening according to claim 3 is characterized in that: The center of the umbrella-type reinforcement device (2) is provided with a support column (201), a support slip ring (202) is slidably mounted on the support column (201), a plurality of support frames (203) are mounted on the support slip ring (202), the support frames (203) are connected to the blocking support block (204), the support slip ring (202) drives the support frame (203) to expand and contract, and when expanded, the blocking support block (204) tightly combines the sealing airbag (1) and the pipe (4).

5. The airbag-type plugging device for pipeline pressure opening according to claim 4 is characterized in that: A propulsion device (4) is slidably mounted on the support column (201), and the propulsion device (4) is mounted at the rear end of the support slip ring (202). Under the control of the control device, the propulsion device (4) pushes the support slip ring (202) to move, thereby opening and closing the umbrella-type reinforcement device (2).

6. The airbag-type plugging device for pipeline pressure opening according to claim 5, characterized in that: The blocking support block (204) is made of solid rubber, and the blocking support block (204) is also tightly provided with a sealing rubber ring (205).

7. The airbag-type plugging device for pipeline pressure opening according to claim 6, characterized in that: The umbrella-type reinforcement device (2) and the control device (3) are connected via a driving rod (7); one end of the driving rod (7) is connected to the control device (3) and the other end is connected to the support column (201) of the reinforcement device (2) via a folding angle bracing joint structure (8).

8. The airbag-type plugging device for pipeline pressure opening according to claim 7, characterized in that: The folding gusset joint structure (8) comprises a hinge seat (801), the hinge seat (801) is connected to the end of the driving rod (7), an ear seat (802) is installed at the end of the support column (201), and the hinge seat (801) and the ear seat (802) are connected together through a hinge shaft (803) and a spring (804).

9. The airbag-type sealing device for opening a pipeline under pressure according to claim 8, characterized in that: The hinge seat (801) comprises a bottom plate (8011), a group of ear plates (8012) are installed on the bottom plate (8011), a side baffle (8013) is installed on one side, a spring (804) is fixed on the side baffle (8013), and the other end is connected to the ear seat (802).

10. The airbag-type plugging device for pipeline pressure opening according to claim 9, characterized in that: The control device (3) is internally provided with a control motor, which controls the extension and retraction of the driving rod (7), thereby pushing the umbrella-type reinforcement device (2) and the sealing airbag (1) forward to the pipeline to be repaired in the area to be repaired of the pipeline (9) to be repaired for sealing; the propulsion device (4) is an electric push rod, the output end of which is fixedly connected to the support slip ring (202).

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