Pipe breaking device and pipe breaking construction technology

Abstract

The application provides a pipe breaking construction device and a pipe breaking construction process, and relates to the technical field of pipeline construction. The pipe breaking construction device comprises a fixing assembly, a rotating support assembly and a screwing mechanism. The fixing assembly is used for fixing on a pipeline. The rotating support assembly comprises a bearing ring and a support arm. The bearing ring is rotationally connected to the fixing assembly. The support arm is connected to the bearing ring. The screwing mechanism is installed on the support arm. The screwing mechanism rotates around the fixing assembly through the rotating support assembly. The screwing mechanism comprises a mounting assembly, a bearing seat, a rotary driving source and a sleeve. The mounting assembly is connected to the support arm. The bearing seat is connected to the mounting assembly. The rotary driving source is connected to the bearing seat. The sleeve is connected to the output end of the rotary driving source. The rotary driving source drives the sleeve to rotate, so that the sleeve is used for tightening the nut on the flange plate.

Description

Technical Field

[0001] This application relates to the technical field of pipeline construction, and in particular to a pipe-breaking construction device and a pipe-breaking construction process. Background Technology

[0002] During the long-term operation of chemical production plants, pipelines, valves, equipment bodies, and flange connections are continuously subjected to the scouring, corrosion, and aging effects of process media, which can easily lead to problems such as pipe wall thinning, seal failure, and component damage. Regular maintenance, replacement, cleaning, and reassembly are necessary. During plant upgrades, renovations, or decommissioning, it is usually required to disassemble and reassemble the flanges at pipeline connections. This involves removing or tightening the nuts distributed around the flanges to disconnect and reconnect the pipeline, a crucial step in the pipe breaking and installation process.

[0003] Currently, the common practice for disassembling and assembling flange nuts is for operators to manually tighten each nut one by one using an electric wrench, pneumatic wrench, or manual wrench. In actual construction, this method is labor-intensive. The flange has a large number of nuts distributed circumferentially, requiring operators to frequently change positions. Prolonged manual tightening leads to significant physical exertion and compromises work efficiency. Some related technologies use flange disassembly and assembly auxiliary tools, but these tools are often fixed support structures, making it difficult to easily switch working positions along the pipeline circumference and thus failing to effectively reduce the labor intensity of construction workers or improve work efficiency. Summary of the Invention

[0004] To facilitate switching of work positions along the circumference of the pipeline for removing and installing flange nuts and improve work efficiency, this application provides a pipe breaking construction device and a pipe breaking construction process.

[0005] Firstly, this application provides a pipe-breaking construction device, which adopts the following technical solution: A pipe-breaking construction device includes a fixing component, a rotating support component, and a tightening mechanism. The fixing component is used to fix itself to a pipe. The rotating support component includes a bearing ring and a support arm. The bearing ring is rotatably connected to the fixing component. The support arm is connected to the bearing ring. The tightening mechanism is mounted on the support arm and rotates around the fixing component via the rotating support component. The tightening mechanism includes a mounting assembly, a support base, a rotary drive source, and a sleeve. The mounting assembly is connected to the support arm, the support base is connected to the mounting assembly, the rotary drive source is connected to the support base, and the sleeve is connected to the output end of the rotary drive source. The rotary drive source drives the sleeve to rotate, so that the sleeve is used to tighten the nut on the flange.

[0006] By adopting the above technical solution, the fixing component can be quickly fixed to the outer wall of the pipe, providing a stable installation foundation for the entire device. The rotating support component allows the tightening mechanism to rotate circumferentially around the pipe axis, eliminating the need for operators to manually operate the tightening mechanism and effectively reducing the labor intensity of flange disassembly and assembly. The tightening mechanism can rotate circumferentially with the rotating support component, sequentially tightening or loosening multiple nuts distributed circumferentially on the flange, significantly improving the efficiency and ease of operation of continuous operation. When the pipe diameter is large, the flange diameter will also increase, and the number of bolts and nuts on the flange will also increase, as will the torque required for disassembling and assembling the flange nuts. The fixing component and rotating support component of this application can support the tightening mechanism and facilitate the switching of the tightening mechanism's working position to disassemble and assemble the flange nuts, thereby reducing labor intensity.

[0007] Optionally, the mounting assembly includes a mounting cylinder, and the support is slidably connected to the mounting cylinder, such that the support can move toward or away from the flange.

[0008] By adopting the above technical solution, the bearing seat is pushed by the sliding fit between the bearing seat and the mounting sleeve, so that the sleeve moves axially closer to or away from the nut on the flange, which facilitates the quick connection and disconnection of the sleeve and the nut, adapts to the axial displacement requirements during the nut disassembly and assembly process, and optimizes the operation process.

[0009] Optionally, the inner wall of the mounting cylinder is provided with a sliding guide groove, and a sliding block is connected to the bearing seat, the sliding block being slidably connected in the sliding guide groove.

[0010] By adopting the above technical solution, the sliding path of the bearing seat is limited by the guiding cooperation between the sliding block and the sliding guide groove, so as to avoid the bearing seat from deflecting during the sliding process, facilitate the alignment of the sleeve and the nut, and improve the stability and operational reliability of the bearing seat during the sliding process.

[0011] Optionally, the mounting assembly further includes an elastic element that abuts against the end of the mounting cylinder and the bearing seat, respectively, and the elastic element causes the bearing seat to move away from the flange.

[0012] By adopting the above technical solution, the elastic element acts between the mounting cylinder and the bearing seat, causing the bearing seat to tend to move away from the flange. After the nut is removed, the external force is removed, and the device can automatically reset under the action of the elastic force without manual retraction, thus improving the efficiency of continuous operation.

[0013] Optionally, the rotation drive source includes a motor and a reducer, both of which are connected within the support base. The motor drives the sleeve to rotate through the reducer.

[0014] By adopting the above technical solution, using an electric drive system with a motor and reducer, the output torque is stable and the speed is controllable. It is suitable for construction scenarios with power supply conditions, the equipment is flexible in deployment, and the consistency of nut tightening torque can be guaranteed, thus improving the flange assembly quality.

[0015] Optionally, the rotary drive source includes a pneumatic wrench and an air supply pipe. The pneumatic wrench is connected to the support base, and the air supply pipe is connected to the pneumatic wrench. The pneumatic wrench drives the sleeve to rotate.

[0016] By adopting the above technical solution and using a pneumatic wrench as the driving source, it is suitable for construction scenarios where power tools are not applicable, such as flammable and explosive environments, and has excellent safety performance; moreover, the pneumatic wrench has a large output torque and fast response speed, which can meet the high torque disassembly and assembly requirements of large-size flange nuts.

[0017] Optionally, it also includes an adjustment assembly, which includes a clamping frame and a clamping member. The clamping frame is sleeved on the support arm, and the tightening mechanism is connected to the clamping frame. The clamping member is threadedly connected to the clamping frame, passes through the clamping frame, and abuts against the support arm to adjust the position of the tightening mechanism on the support arm.

[0018] By adopting the above technical solution, the radial position of the screwing mechanism can be adjusted by sliding the clamping frame along the support arm, and the position can be fixed by threaded locking of the clamping part. It can be adapted to flanges of different diameters, effectively expanding the application range of the device. Moreover, the adjustment operation is simple and the positioning is reliable.

[0019] Optionally, there are two support arms and two corresponding turning mechanisms, with the two support arms on the same straight line.

[0020] By adopting the above technical solution and setting up two sets of symmetrically arranged tightening mechanisms, the two nuts at symmetrical positions on the flange can be disassembled and installed simultaneously, which can effectively improve the work efficiency; and the symmetrical force application can make the flange bear the force evenly, avoid the flange from being misaligned, and ensure the sealing performance and assembly accuracy of the flange connection.

[0021] Optionally, the fixing component includes a mounting ring, an adjusting screw, a pad, and a connecting fastener; the mounting ring includes two mounting half-rings, each of which is connected to a lug, the two mounting half-rings are fitted together on the pipe, and the lugs on the two mounting half-rings are connected by the connecting fastener; The bearing ring includes two bearing half-rings. The support arm is connected to one of the bearing half-rings. The two bearing half-rings correspond one-to-one with the two mounting half-rings. The two bearing half-rings are fitted around the mounting ring. The bearing half-rings and the mounting half-rings are circumferentially slidably connected. The bearing half-rings can rotate around the axis of the mounting ring. The adjusting screw passes through the mounting ring and is threadedly connected to the mounting ring. The pad is fixedly connected to the end of the adjusting screw. Rotating the adjusting screw causes the pad to press against the pipe.

[0022] By adopting the above technical solution, both the mounting ring and the bearing ring are designed with a split structure, which facilitates quick installation on the outside of the pipe or removal from the pipe, improving the efficiency of the device's assembly and disassembly. By rotating the adjusting screw to move the pad against the pipe, the coaxiality between the mounting ring and the pipe can be adjusted, ensuring smooth rotation of the rotating support assembly. This also allows for adaptation to pipes of different diameters, further expanding the device's applicable scenarios.

[0023] Secondly, this application also provides a pipe breaking construction process, using the above-mentioned pipe breaking construction device, including S1, flange disconnection process; S2, flange installation process; Step S1 includes: S11. Pre-operation safety check and equipment preparation: Confirm that the pipeline to be operated is depressurized and cleaned to be qualified, and that the operators are equipped with protective equipment and are located upwind of the work site; S12. Installation and positioning of construction equipment: Fix the fixing components to the outer wall of the pipe on the side of the flange to be removed, and calibrate the coaxiality of the fixing components and the pipe; adjust the radial position of each set of tightening mechanisms along the support arm, and lock the position after the rotation radius of the sleeve matches the distribution radius of the flange nut. S13. Symmetrical step-by-step unloading: The rotating support assembly rotates circumferentially, driving the two sets of tightening mechanisms to switch positions synchronously, so that the two sets of sleeves are respectively aligned with the two sets of nuts on the opposite side of the flange, and the corresponding nuts are loosened one nut apart in sequence, gradually releasing the elastic energy in the flange. S14. Media Risk Verification and Nut Removal: Pry open the flange contact surface to form a gap, and after confirming that no residual fluid flows out, loosen all nuts and bolts in sequence through the tightening mechanism, and remove all nuts and bolts simultaneously to complete the separation of the two flanges. S15. Sealing surface pretreatment: Use a soft tool with a hardness lower than that of the flange body material to remove gasket residue from the flange sealing surface. Step S2 includes: S21. Component inspection and cleaning: Inspect the specifications and appearance of the flange sealing surface, fasteners and gaskets, and clean the accumulated material, corrosion and thread burrs on the sealing surface. S22. Rust inhibitor application: Apply rust inhibitor evenly to the threaded surface and bearing contact surface of bolts and nuts; S23. Centering and leveling and gasket assembly: Adjust the parallelism and concentricity of the flanges on both sides to within the allowable deviation threshold, and place the sealing gasket in the center between the sealing surfaces of the two flanges. S24. Graded cross-tightening: Control the output torque of the rotary drive source, and divide it into three grades according to 30%, 60% and 100% of the rated tightening torque, and tighten the nuts in a cross-symmetrical order. S25. Quality Traceability Marking: A mark with a lead seal is attached to the flange connection to record information about the entire operation process.

[0024] In summary, this application includes at least one of the following beneficial effects: 1. The fixing component is fixed to the pipeline. The rotating support component drives the tightening mechanism to rotate circumferentially. The tightening mechanism disassembles and installs the flange nuts without manual hand operation, reducing the labor intensity of construction and improving the efficiency of continuous disassembly and assembly of multiple flange nuts. 2. The radial position of the turning mechanism is adjustable, and with the pipe diameter adjustment structure of the fixing component, it can be adapted to pipes and flanges of different diameters. The device has a wide range of applications and the adjustment operation is simple and quick. 3. The two sets of symmetrically arranged tightening mechanisms can simultaneously complete the disassembly and assembly of nuts at symmetrical positions on the flange, which not only improves work efficiency but also ensures balanced force on the flange, thereby improving the sealing performance and overall assembly quality of the flange assembly. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the pipe-breaking construction device in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the exploded structure of the pipe-breaking construction device in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the support arm, adjustment assembly, and turning mechanism in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the pipe-breaking construction device according to other embodiments of this application; Figure 5 This is a cross-sectional structural diagram of the screwing mechanism in Embodiment 1 of this application; Figure 6 This is a cross-sectional structural diagram of the twisting mechanism in Embodiment 2 of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Fixing component; 11. Mounting ring; 111. Mounting half ring; 12. Adjusting screw; 13. Pad; 14. Ear plate; 15. Connecting fastener; 2. Rotating support component; 21. Bearing ring; 211. Bearing half ring; 22. Support arm; 3. Tightening mechanism; 31. Mounting component; 311. Mounting cylinder; 312. Sliding block; 313. Elastic element; 32. Bearing seat; 33. Rotary drive source; 331. Motor; 332. Reducer; 333. Pneumatic wrench; 334. Air supply pipe; 34. Sleeve; 4. Adjusting component; 41. Clamping frame; 42. Clamping element. Detailed Implementation

[0027] The following combination Figures 1 to 6 This application will be described in further detail.

[0028] Example 1:

[0029] Embodiment 1 of this application provides a pipe-breaking construction device.

[0030] refer to Figure 1 and Figure 2 A pipe-breaking construction device includes a fixing component 1, a rotating support component 2, a tightening mechanism 3, and an adjusting component 4. The fixing component 1 is detachably fixed to the outer wall of the pipe to be repaired, providing a stable installation reference for the entire device. The rotating support component 2 is rotatably connected to the outside of the fixing component 1 and can rotate circumferentially around the axis of the pipe. The tightening mechanism 3 is mounted on the rotating support component 2 via the adjusting component 4 and can rotate circumferentially synchronously with the rotating support component 2 to sequentially disassemble and assemble multiple nuts distributed circumferentially on the flange. This eliminates the need for operators to manually operate the tightening mechanism 3, effectively reducing the labor intensity of flange disassembly and assembly, and significantly improving the efficiency and ease of operation for continuous work.

[0031] refer to Figure 1 and Figure 2 The fixing component 1 includes a mounting ring 11, an adjusting screw 12, a pad 13, and a connecting fastener 15. The mounting ring 11 comprises two symmetrical mounting half-rings 111, each half-ring 111 having an integrally formed ear plate 14 at both ends. The two mounting half-rings 111 together form a complete annular structure and are fitted onto the outside of the pipe. The ear plates 14 on the same side of the two mounting half-rings 111 fit together, and the connecting fastener 15 passes through the fitting ear plates 14 to lock and fix the two mounting half-rings 111. Preferably, the connecting fastener 15 can be a combination of a connecting bolt and a lock nut. The connecting bolt passes through the mounting holes on the two ear plates 14 and engages with the lock nut threadedly, enabling quick installation and removal of the mounting ring 11, facilitating the rapid installation or removal of the device from the pipe.

[0032] refer to Figure 1 and Figure 2An adjusting screw 12 is threaded through the mounting half-ring 111 along the radial direction of the mounting ring 11. A pad 13 is fixedly connected to the end of the adjusting screw 12 facing the pipe axis. The pad 13 increases the contact area with the pipe, improving the stability of the fixation. When the adjusting screw 12 is rotated, the pad 13 moves radially along the mounting ring 11, pressing it against the outer wall of the pipe. Multiple adjusting screws 12 and pads 13 are provided and correspond one-to-one. The multiple adjusting screws 12 are evenly distributed along the circumference of the mounting ring 11. By adjusting the extension length of each adjusting screw 12, the coaxiality between the mounting ring 11 and the pipe can be calibrated, ensuring smooth operation of the subsequent rotating support assembly 2. It can also adapt to pipes of different diameters, expanding the applicability of the device. In actual construction, the diameter of the pipe to be constructed is known, and the diameter of the mounting ring 11 is also known. A ruler can be used to measure the distance between the end face of the pad 13 and the inner wall of the mounting ring 11, thereby adjusting the extension length of each adjusting screw 12 to improve the coaxiality between the mounting ring 11 and the pipe.

[0033] refer to Figure 1 and Figure 2 The rotating support assembly 2 includes a bearing ring 21 and a support arm 22. The bearing ring 21 is coaxially sleeved on the outside of the mounting ring 11, and the bearing ring 21 is rotatably connected to the mounting ring 11, allowing the bearing ring 21 to rotate circumferentially around the axis of the mounting ring 11. The bearing ring 21 includes two structurally symmetrical bearing half-rings 211, which are correspondingly arranged with two mounting half-rings 111. The two bearing half-rings 211 together form a complete bearing ring 21 and are sleeved on the outside of the mounting ring 11. The outer peripheral wall of the mounting half-ring 111 has an annular groove extending circumferentially, and the inner peripheral wall of the bearing half-ring 211 has a corresponding annular protrusion. The annular protrusion slides into the annular groove, thereby achieving circumferential sliding fit between the bearing half-ring 211 and the mounting half-ring 111, while limiting the axial displacement of the bearing half-ring 211 and ensuring the stability of the rotation process.

[0034] refer to Figure 1 and Figure 2 In this embodiment, one mounting half-ring 111 corresponds to four ear plates 14. Each mounting half-ring 111 has two ear plates 14 at both ends. The carrying half-ring 211 is located between the two ear plates 14 at the ends of the mounting half-ring 111. After the two mounting half-rings 111 are fixed by the ear plates 14 and the connecting fasteners 15, the alignment accuracy of the two mounting half-rings 111 is further improved, thereby improving the alignment accuracy of the two carrying half-rings 211. This allows the carrying half-ring 211 corresponding to one of the mounting half-rings 111 to slide smoothly onto the other mounting half-ring 111.

[0035] refer to Figure 2 and Figure 3The support arm 22 is fixedly connected to the bearing ring 21, and the support arm 22 extends outward along the radial direction of the bearing ring 21. In this embodiment, both the support arm 22 and the tightening mechanism 3 are provided, and the tightening mechanism 3 is mounted on the support arm 22.

[0036] refer to Figure 4 In other embodiments of this example, two support arms 22 are provided, each fixed to one of the two bearing half-rings 211, and the two support arms 22 are on the same straight line, i.e., symmetrically arranged along the same diameter direction of the bearing ring 21. Two sets of tightening mechanisms 3 are correspondingly provided, each installed on one of the two support arms 22. This symmetrical arrangement of the two sets of tightening mechanisms 3 allows for simultaneous disassembly and assembly / disassembly of two nuts at symmetrical positions on the flange, effectively improving work efficiency; and symmetrical force application ensures balanced force on the flange, preventing misalignment during flange assembly and guaranteeing the sealing performance and assembly accuracy of the flange connection.

[0037] refer to Figure 3 and Figure 5 The tightening mechanism 3 includes a mounting assembly 31, a bearing seat 32, a rotary drive source 33, and a sleeve 34. The mounting assembly 31 is mounted on the support arm 22 via an adjusting assembly 4, which includes a clamping frame 41 and a clamping member 42. The clamping frame 41 is a frame-shaped structure, fitted onto the support arm 22, and can slide along the length of the support arm 22, i.e., along the radial direction of the bearing ring 21. The tightening mechanism 3 is connected to the clamping frame 41 and moves synchronously with the clamping frame 41. The clamping member 42 is specifically a locking screw, threadedly connected to the clamping frame 41, and the rod end of the clamping member 42 can pass through the side wall of the clamping frame 41 and abut against the surface of the support arm 22. When the radial position of the tightening mechanism 3 needs to be adjusted, loosen the clamping member 42, slide the clamping frame 41 along the support arm 22 to the target position, and then tighten the clamping member 42 so that the end of the clamping member 42 presses against the support arm 22. The clamping frame 41 and the support arm 22 are fixed relative to each other by friction. By adjusting the structure, the radial position of the tightening mechanism 3 can be adjusted to adapt to flanges of different diameters, further expanding the applicable scenarios of the device. Moreover, the adjustment operation is simple and the positioning is reliable.

[0038] refer to Figure 3 and Figure 5The mounting assembly 31 includes a mounting cylinder 311, a sliding block 312, and an elastic element 313. The axis of the mounting cylinder 311 is parallel to the axis of the bearing ring 21, and the outer wall of the mounting cylinder 311 is fixedly connected to the clamping frame 41. The bearing seat 32 is slidably mounted in the internal cavity of the mounting cylinder 311, and the rotary drive source 33 is mounted inside the bearing seat 32. The bearing seat 32 can slide along the axial direction of the mounting cylinder 311, thereby driving the rotary drive source 33 and the sleeve 34 to move towards or away from the flange as a whole, which facilitates the quick connection and disconnection of the sleeve 34 and the nut, adapts to the axial displacement requirements during the nut assembly and disassembly process, and optimizes the operation process.

[0039] refer to Figure 5 To improve the smoothness of the sliding of the bearing seat 32, the inner wall of the mounting cylinder 311 is provided with a sliding guide groove extending axially. A sliding block 312 is fixedly connected to the outer peripheral wall of the bearing seat 32, and the sliding block 312 is slidably embedded in the sliding guide groove. Through the guiding cooperation between the sliding block 312 and the sliding guide groove, the sliding path of the bearing seat 32 can be circumferentially limited, preventing circumferential deflection of the bearing seat 32 during the sliding process, facilitating the alignment of the sleeve 34 and the nut, and improving the smoothness and operational reliability of the sliding process of the bearing seat 32.

[0040] refer to Figure 5 The elastic element 313 is housed in the internal cavity of the mounting cylinder 311. The elastic element 313 abuts against the end of the mounting cylinder 311 and the bearing seat 32 respectively. The elastic element 313 keeps the bearing seat 32 away from the flange. After the nut is disassembled and installed, the external force is removed, and the tightening mechanism 3 can automatically reset under the action of the elastic force without manual retraction, thus improving the efficiency of continuous operation.

[0041] refer to Figure 5 In this embodiment, the rotary drive source 33 includes a motor 331 and a reducer 332. Both the motor 331 and the reducer 332 are fixedly mounted on the support base 32. The output shaft of the motor 331 is connected to the input end of the reducer 332. The output end of the reducer 332 is coaxially fixed to the sleeve 34 and detachably connected, thus facilitating the replacement of sleeves 34 of different specifications to adapt to nuts of different flange specifications. The power output by the motor 331 is reduced and amplified by the reducer 332, driving the sleeve 34 to rotate stably. The electric drive form of motor 331 combined with reducer 332 provides stable output torque and controllable speed, suitable for construction scenarios with power supply conditions. The equipment is flexible in deployment and can ensure the consistency of nut tightening torque, improving the flange assembly quality.

[0042] Embodiment 1 of this application also provides a pipe-breaking construction process, including the following steps: S1, Flange disconnection procedure; S2, Flange installation procedure.

[0043] The S1 flange disconnection process includes: S11, pre-construction safety check and equipment preparation; S12, installation of construction equipment; S13, symmetrical step-by-step unloading; S14, medium risk verification and nut removal; S15, sealing surface pretreatment.

[0044] Specifically, S11, Pre-operation safety checks and equipment preparation: Confirm that the pipeline to be worked on has been depressurized, cleaned and replaced, and passed inspection. The operators are equipped with the corresponding protective equipment as required and stand upwind of the work site. Verify that the 34-size sleeve of the pipe rupture device matches the nut to be removed, that the connection pipeline of the electric or pneumatic drive source is intact and in normal working condition, and confirm that all moving parts of the device operate smoothly.

[0045] S12. Installation and positioning of the construction device: Place the two installation half-rings 111 of the pipe-breaking construction device around the outer wall of the pipe on the side of the flange to be disassembled. Align the ear plate 14 and insert the connecting fastener 15 to lock it in place, forming a complete installation ring 11. Adjust the extension length of each adjusting screw 12 evenly in the circumference, causing the pad 13 to press against the outer wall of the pipe. Calibrate the coaxiality of the installation ring 11 with the pipe to ensure the device is securely installed. Slide the clamping frame 41 along the support arm 22, adjust the radial position of the tightening mechanism 3 so that the rotation radius of the sleeve 34 matches the distribution radius of the flange nut, and tighten the clamping part 42 to lock the position.

[0046] S13. Symmetrical Step-by-Step Unloading: Rotating the support arm 22 drives the bearing ring 21 to rotate around the pipe circumference, so that the sleeves 34 of the two sets of tightening mechanisms 3 are respectively aligned with the two sets of nuts on the opposite side of the flange. After pushing the bearing seat 32 to make the sleeves 34 fit the nuts, start the rotary drive source 33, and operate in a "one-off" alternating sequence, that is, operate at a position that is one nut off, and loosen the corresponding nuts by two teeth one by one, gradually releasing the elastic energy inside the flange. After the unloading operation of each set of nuts is completed, the sleeves 34 automatically reset under the action of the elastic element 313 after the thrust is removed, and the rotating support assembly 2 switches to the next station. Repeat the above operation until the entire flange circumference of nuts has been unloaded for the first time, avoiding the safety risk caused by the flange being forced open on one side.

[0047] S14. Media Risk Verification and Nut Removal: Use a pry bar to open the flange contact surface to form a gap. After confirming that there is no residual fluid flowing out and no residual pressure inside, restart the tightening mechanism 3. With the help of the rotating support assembly 2, loosen all the nuts completely and remove them in sequence along the circumference. Simultaneously pull out all the connecting bolts to complete the flange separation operation.

[0048] S15. Pre-treatment of sealing surfaces: Use a soft scraper tool with a hardness lower than that of the flange body material to remove gasket residue, dirt and corrosion on the flange sealing surface. Avoid scratching the sealing surface during the cleaning process to ensure the sealing performance of subsequent reassembly.

[0049] The S2 flange installation process includes: S21, component inspection and cleaning; S22, rust inhibitor application; S23, centering and leveling and gasket assembly; S24, graded cross-tightening; and S25, quality traceability labeling.

[0050] Specifically, S21, Component Inspection and Cleaning: Inspect the sealing surface, fasteners, and gaskets of the flange to be installed, check their specifications and appearance quality, clean up any accumulated material and loose rust on the sealing surface and burrs on the fastener threads, and confirm that there are no defects that would affect the sealing and connection.

[0051] S22. Rust inhibitor application: Apply the specified type of rust inhibitor evenly to the threaded surfaces of the bolt shank and nut, as well as the bearing contact surfaces of the bolt head and nut, to prevent thread corrosion and jamming after long-term operation and to facilitate subsequent maintenance and disassembly.

[0052] S23. Centering and Leveling, and Gasket Assembly: Adjust the relative positions of the flanges on both sides of the pipeline, controlling the parallelism and concentricity of the flanges within the allowable deviation threshold for the corresponding operating conditions. Place the gasket centered between the sealing surfaces of the two flanges, ensuring that the gasket is coaxial with the flanges and without offset. Initially insert some bolts to temporarily position the flanges and prevent gasket displacement.

[0053] S24, graded cross-fastening: Based on the installed pipe-breaking equipment, the flange nut tightening operation is completed in three stages to ensure uniform stress on the flange sealing surface: Initial tightening stage: Set the output torque of the rotary drive source 33 to 30% of the rated tightening torque, rotate the support assembly 2 to drive the tightening mechanism 3 to change position circumferentially, tighten the nuts one group at a time in a cross-symmetrical order, complete the initial tightening of the entire nut, and make the gasket initially uniformly pressurized. Medium tightening stage: Increase the output torque to 60% of the rated tightening torque, and repeat the tightening operation in the same cross-symmetrical sequence to further compress the gasket and ensure that the flange sealing surfaces are parallel and in contact. Final tightening stage: Adjust the output torque to 100% of the rated tightening torque to complete the final tightening of all nuts around the circumference, ensuring that the tightening torque of each nut is consistent and eliminating stress deviations.

[0054] During operation, the two sets of symmetrically arranged tightening mechanisms 3 can simultaneously tighten the nuts on opposite sides, improving work efficiency while ensuring balanced force on the flange and avoiding assembly misalignment.

[0055] S25. Quality Traceability Identification: A work identification tag with a lead seal is attached to the flange connection to record the full process information such as the operator, tightening torque parameters, work time, and gasket model, so as to achieve traceable management of construction quality.

[0056] After all the work is completed, loosen the adjusting screw 12 in sequence, disassemble and install the half ring 111, remove the pipe breaking construction device from the pipeline, and clean up and store it to complete the site clearance.

[0057] The implementation principle of the pipe-breaking construction device and pipe-breaking construction process in Embodiment 1 of this application is as follows: First, the device is installed and secured. The two mounting half-rings 111 are fitted around the outside of the pipe to be constructed. After aligning the two ear plates 14, the connecting fasteners 15 are inserted and locked to form a complete mounting ring 11. Then, each adjusting screw 12 is turned sequentially, moving the pads 13 towards the pipe, ensuring each pad 13 is pressed against the outer wall of the pipe. The extension lengths of each adjusting screw 12 are adjusted to be consistent, calibrating the coaxiality of the mounting ring 11 and the pipe. Next, the flange nut is disassembled and assembled. The clamping frame 41 is slid along the support arm 22, and the radial position of the tightening mechanism 3 is adjusted to align the sleeve 34 with the nut on the flange. The clamping part 42 is then tightened to fix the position. The support arm 22 is then rotated, causing the bearing ring 21 to rotate circumferentially around the mounting ring 11, aligning the sleeve 34 axially with the target nut. The operator pushes the bearing seat 32 towards the flange, causing it to slide axially along the mounting sleeve 311. The sleeve 34 moves accordingly and engages with the outside of the nut. The rotary drive source 33 is activated, causing the sleeve 34 to rotate, thus completing the tightening or loosening operation of the nut. After completing the operation on a single nut, the thrust on the bearing seat 32 is removed. The bearing seat 32 automatically resets under the elastic force of the elastic element 313, causing the sleeve 34 to disengage from the nut. Continue rotating the support arm 22 to rotate the tightening mechanism 3 to the corresponding position of the next nut, repeating the above-mentioned sleeve, tightening, and reset operations to complete the disassembly and assembly of all nuts around the flange in sequence. For the scheme with a double set of tightening mechanisms 3, the operation on nuts in two symmetrical positions can be carried out simultaneously, further improving construction efficiency and ensuring balanced force on the flange.

[0058] Example 2:

[0059] Embodiment 2 of this application provides a pipe-breaking construction device. The difference between Embodiment 2 and Embodiment 1 is that: refer to Figure 6 The rotary drive source 33 includes a pneumatic wrench 333 and an air supply pipe 334. The pneumatic wrench 333 is fixedly installed inside the support base 32. One end of the air supply pipe 334 is connected to the air inlet of the pneumatic wrench 333, and the other end is used to connect to an external compressed air source. The output end of the pneumatic wrench 333 is coaxially and fixedly connected to the socket 34. Compressed gas enters the pneumatic wrench 333 through the air supply pipe 334, driving the pneumatic wrench 333 to rotate the socket 34. Using the pneumatic wrench 333 as the drive source is suitable for construction scenarios where power tools are not applicable, such as flammable and explosive environments, and offers excellent safety performance. Furthermore, the pneumatic wrench 333 has a large output torque and fast response speed, which can meet the high torque disassembly and assembly requirements of large-size flange nuts.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe-breaking construction device, characterized in that: The device includes a fixing component (1), a rotating support component (2), and a screwing mechanism (3). The fixing component (1) is used to fix the device to the pipe. The rotating support component (2) includes a bearing ring (21) and a support arm (22). The bearing ring (21) is rotatably connected to the fixing component (1). The support arm (22) is connected to the bearing ring (21). The screwing mechanism (3) is mounted on the support arm (22). The screwing mechanism (3) rotates around the fixing component (1) through the rotating support component (2). The tightening mechanism (3) includes a mounting assembly (31), a support (32), a rotary drive source (33), and a sleeve (34). The mounting assembly (31) is connected to the support arm (22), the support (32) is connected to the mounting assembly (31), the rotary drive source (33) is connected to the support (32), and the sleeve (34) is connected to the output end of the rotary drive source (33). The rotary drive source (33) drives the sleeve (34) to rotate, so that the sleeve (34) is used to tighten the nut on the flange.

2. The pipe-breaking construction device according to claim 1, characterized in that: The mounting assembly (31) includes a mounting cylinder (311), and the support (32) is slidably connected to the mounting cylinder (311), such that the support (32) can move toward or away from the flange.

3. The pipe-breaking construction device according to claim 2, characterized in that: The inner wall of the mounting cylinder (311) is provided with a sliding guide groove, and a sliding block (312) is connected to the bearing seat (32). The sliding block (312) is slidably connected in the sliding guide groove.

4. The pipe-breaking construction device according to claim 2, characterized in that: The mounting assembly (31) further includes an elastic element (313) that abuts against the end of the mounting cylinder (311) and the bearing seat (32) respectively, and the elastic element (313) causes the bearing seat (32) to move away from the flange.

5. The pipe-breaking construction device according to claim 2, characterized in that: The rotary drive source (33) includes a motor (331) and a reducer (332). The motor (331) and the reducer (332) are both connected inside the support (32). The motor (331) drives the sleeve (34) to rotate through the reducer (332).

6. The pipe-breaking construction device according to claim 2, characterized in that: The rotary drive source (33) includes a pneumatic wrench (333) and an air supply pipe (334). The pneumatic wrench (333) is connected to the bearing seat (32), and the air supply pipe (334) is connected to the pneumatic wrench (333). The pneumatic wrench (333) drives the sleeve (34) to rotate.

7. The pipe-breaking construction device according to claim 1, characterized in that: It also includes an adjustment component (4), which includes a clamping frame (41) and a clamping member (42). The clamping frame (41) is sleeved on the support arm (22), and the screwing mechanism (3) is connected to the clamping frame (41). The clamping member (42) is threadedly connected to the clamping frame (41), and the clamping member (42) passes through the clamping frame (41) and abuts against the support arm (22) to adjust the position of the screwing mechanism (3) on the support arm (22).

8. The pipe-breaking construction device according to claim 1, characterized in that: There are two support arms (22) and two corresponding screwing mechanisms (3), with the two support arms (22) on the same straight line.

9. A pipe-breaking construction device according to claim 1, characterized in that: The fixing component (1) includes a mounting ring (11), an adjusting screw (12), a pad (13), and a connecting fastener (15); the mounting ring (11) includes two mounting half-rings (111), each of the two mounting half-rings (111) is connected to an ear plate (14), the two mounting half-rings (111) are fitted together on the pipe, and the ear plates (14) on the two mounting half-rings (111) are connected by the connecting fastener (15); The bearing ring (21) includes two bearing half-rings (211). The support arm (22) is connected to one of the bearing half-rings (211). The two bearing half-rings (211) correspond one-to-one with the two mounting half-rings (111). The two bearing half-rings (211) are fitted around the mounting ring (11). The bearing half-rings (211) and the mounting half-rings (111) are circumferentially slidably connected. The bearing half-rings (211) can rotate around the axis of the mounting ring (11). The adjusting screw (12) passes through the mounting ring (11) and is threadedly connected to the mounting ring (11). The pad (13) is fixedly connected to the end of the adjusting screw (12). Rotating the adjusting screw (12) causes the pad (13) to press against the pipe.

10. A pipe-breaking construction process, characterized in that: The pipe-breaking construction device as described in any one of claims 1-9 includes S1, flange disconnection procedure; and S2, flange installation procedure. Step S1 includes: S11. Pre-operation safety check and equipment preparation: Confirm that the pipeline to be operated is depressurized and cleaned to be qualified, and that the operators are equipped with protective equipment and are located upwind of the work site; S12. Installation of construction equipment: Fix the fixing component (1) to the outer wall of the pipe on the side of the flange to be removed, and calibrate the coaxiality of the fixing component (1) and the pipe; adjust the radial position of each set of tightening mechanisms (3) along the support arm (22) so that the rotation radius of the sleeve (34) matches the distribution radius of the flange nut and then lock the position. S13, Symmetrical step-by-step unloading: make the rotating support assembly (2) rotate circumferentially, drive the two sets of screwing mechanisms (3) to switch positions synchronously, so that the two sets of sleeves (34) are respectively aligned with the two sets of nuts on the opposite side of the flange, and loosen the corresponding nuts one nut apart in sequence to gradually release the elastic energy in the flange. S14. Media risk verification and nut removal: Pry open the flange contact surface to form a gap, and after confirming that no residual fluid flows out, loosen and remove all nuts and bolts in sequence by tightening mechanism (3) to complete the separation of the two flanges; S15. Sealing surface pretreatment: Use a soft tool with a hardness lower than that of the flange body material to remove gasket residue from the flange sealing surface. Step S2 includes: S21. Component inspection and cleaning: Check the specifications and appearance of the flange sealing surface, fasteners (15) and gaskets, and clean the accumulated material, corrosion and thread burrs of the sealing surface and fasteners (15). S22. Rust inhibitor application: Apply rust inhibitor evenly to the threaded surface and bearing contact surface of bolts and nuts; S23. Centering and leveling and gasket assembly: Adjust the parallelism and concentricity of the flanges on both sides to within the allowable deviation threshold, and place the sealing gasket in the center between the sealing surfaces of the two flanges. S24, graded cross-tightening: control the output torque of the rotary drive source (33) and divide it into three grades according to 30%, 60% and 100% of the rated tightening torque, and tighten the nuts in a cross-symmetrical order. S25. Quality Traceability Marking: A mark with a lead seal is attached to the flange connection to record information about the entire operation process.

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