Large-diameter cast iron pipe butting traction device and traction method

Abstract

This invention discloses a large-diameter cast iron pipe alignment and traction device and method, belonging to the field of pipeline installation. The device includes a horizontal pipe and a fastening ring. The horizontal pipe is connected to the socket end of the cast iron pipe to be installed. The fastening ring is located on the upper outer wall of the socket end of the installed cast iron pipe, and a control module is located at its lower end. An electric hoist traction structure electrically connected to the control module is located on one side. The electric hoist traction structure is connected to a traction seat, and a fixing hook is located at one end of the traction seat, connected to the horizontal pipe. A sliding groove is formed on the fastening ring, and a support seat is provided between the groove and the cast iron pipe. An adjusting bolt is provided on the support seat, allowing it to slide against the groove. A rubber disc is located at the lower end of the support seat, abutting against the outer wall surface of the cast iron pipe. This invention solves the problems of inconvenient disassembly and assembly, inability to synchronously control the traction force leading to pipe misalignment, low alignment accuracy, and lack of overload protection in existing cast iron pipe alignment and traction devices.

Description

Technical Field

[0001] This invention belongs to the field of pipeline installation technology, specifically relating to a large-diameter cast iron pipe alignment and traction device and traction method. Background Technology

[0002] In the construction of large-scale water conservancy, municipal water supply and drainage, and water diversion projects, a large number of large-diameter pipelines are installed. Large-diameter cast iron pipes are widely used in various large-scale water transmission projects due to their high strength, good corrosion resistance, and long service life. These pipes typically employ a socket-type flexible joint structure. During construction, the spigot end of the pipe to be installed needs to be smoothly and precisely pushed into the socket end of the already installed pipe to achieve the pipe connection.

[0003] Currently, the common method for aligning ductile iron pipes during installation is as follows: a crane is used with a sling to lift the pipe to be installed to the same height as the already installed pipe. Simultaneously, a sling is used to wrap around the already installed pipe. Then, steel wire ropes are attached to the slings of both pipes, and a hand-operated hoist, along with a large number of manual laborers, is used for traction, thus achieving the alignment of the cast iron pipes. However, while this method achieves mechanical traction to some extent, the overall operation is cumbersome and the construction efficiency is low.

[0004] Furthermore, during the aforementioned operations, traditional hand-operated hoists cannot achieve synchronous traction from both sides and lack overload protection, easily leading to uneven traction force and causing pipe misalignment, affecting the overall installation accuracy. Uneven force also results in inconsistent compression of the sealing ring at the socket, causing uneven gaps and ultimately leading to leakage at the pipe joint. Therefore, existing technologies suffer from technical defects such as inconvenient disassembly and assembly of the traction device, inability to synchronously control the traction force, and low alignment accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide a large-diameter cast iron pipe alignment and traction device and method, which can solve the problems of inconvenient disassembly and assembly, inability to synchronously control the traction force leading to pipe skewing, low alignment accuracy, and lack of overload protection in the existing cast iron pipe alignment and traction devices.

[0006] In a first aspect, the present invention provides a large-diameter cast iron pipe fitting and traction device, comprising a horizontal pipe and a fastening shackle, wherein the horizontal pipe is detachably connected to the socket end of the cast iron pipe to be installed, for providing lateral support perpendicular to the axial direction of the cast iron pipe to be installed; The fastening ring is semi-circular and covers the upper outer wall of the socket end of the installed cast iron pipe. Each free end is equipped with a control module. Each control module is equipped with an electric hoist traction structure on the side near the horizontal pipe. The electric hoist traction structure is electrically connected to the corresponding control module. Each electric hoist traction structure is connected to a traction seat through chain drive. One end of the traction seat is equipped with a fixed hook. The two fixed hooks are respectively connected to the two sides of the horizontal pipe. The fastening ring has a groove extending circumferentially along the fastening ring. A support seat is provided between the groove and the outer wall of the cast iron pipe. An adjusting bolt is provided at the upper end of the support seat. The support seat slides in contact with the groove through the adjusting bolt. A rubber disc is provided at the lower end of the support seat. The rubber disc abuts against the outer wall surface of the installed cast iron pipe.

[0007] As a further implementation, the horizontal tube includes two sets of parallel mounting rods, with positioning blocks at both ends of the mounting rods. The two sets of mounting rods are assembled and connected through the positioning blocks, which are used to abut against the outer wall of the cast iron pipe to be installed. A fixed seat is provided on the inner side of the horizontal tube. A limit wheel is provided on the side of the fixed seat near the cast iron pipe to be installed. The limit wheel slides with the fixed seat through a slide rail. A screw is provided on the side of the limit wheel away from the positioning block. A handwheel is rotatably connected to the side of the fixed seat away from the limit wheel. One end of the handwheel's shaft is driven by the screw through a helical gear. When the handwheel is rotated, it drives the limit wheel to slide along the slide rail to adjust the distance between the limit wheel and the inner wall of the cast iron pipe to be installed.

[0008] As a further implementation, a rubber tire is fixedly fitted on the outer side of the limiting wheel. The outer surface of the rubber tire is provided with anti-slip texture. The rubber tire is used to roll and cooperate with the sealing sleeve of the inner wall of the cast iron pipe to be installed. The limiting wheel cooperates with the positioning block to achieve the clamping and positioning of the cast iron pipe to be installed.

[0009] As a further implementation, the positioning block is provided with mounting holes, and the support tube is detachably inserted into the positioning block through the mounting holes. There are four sets of support tubes, which are symmetrically distributed with the axis of the horizontal tube as the axis of symmetry. Two sets of support tubes are arranged side by side on each side of the horizontal tube. Each support tube is provided with a mounting plate at one end near the outer wall of the cast iron pipe to be installed. The mounting plate is detachably connected to the support tube by bolts and is used to abut and limit the movement against the outer wall of the cast iron pipe to be installed.

[0010] As a further implementation, a rubber pad is provided on the side of the mounting plate near the cast iron pipe to be installed. The end of the rubber pad has an arc-shaped notch that matches the outer contour of the cast iron pipe to be installed. The rubber pad is used to position and cooperate with the outer wall surface of the cast iron pipe to be installed.

[0011] As a further implementation, the control module is equipped with a control circuit board and a power supply module. A control panel is located on the side of the control module away from the installed cast iron pipe. The control panel is electrically connected to the control circuit board and is used to send control commands to the electric hoist traction structure. A chain telescopic dust cover is fixedly installed at the lower end of the electric hoist traction structure. The chain telescopic dust cover is fitted on the outside of the traction chain and is used to store the traction chain.

[0012] As a further implementation, the control module also includes a wireless signal transceiver module, which is electrically connected to the control circuit board and is used to receive remote control signals to control the operation of the equipment.

[0013] As a further implementation, the lower end of the control module is fixedly equipped with two sets of hooks. The hooks are used to detachably connect to one end of the fixing cable. The fixing cable is used to wrap around the outer wall of the installed cast iron pipe to improve the connection strength between the fastening ring and the installed cast iron pipe.

[0014] As a further implementation, two sets of fastening rings are arranged side by side along the axial direction of the installed cast iron pipe, with the two sets of fastening rings spaced apart. Each fastening ring is provided with a sliding groove. The upper end of the support base is provided with two sets of adjusting bolts. The support base is connected to the two sliding grooves respectively through the two sets of adjusting bolts. The width of the support base along the axial direction of the installed cast iron pipe is greater than the width of the fastening rings.

[0015] A second aspect of the present invention provides a method for traction of large-diameter cast iron pipes, based on the large-diameter cast iron pipe traction device described in the first aspect of the present invention, comprising the following steps: S1. Place the fastening ring on the upper part of the outer wall of the socket end of the installed cast iron pipe, adjust the bolts, and let the support slide along the slide groove to the position where it abuts against the outer wall of the installed cast iron pipe, and fix the fastening ring to the installed cast iron pipe. S2. Place the horizontal pipe on one side of the socket end of the cast iron pipe to be installed, insert one end of the support pipe into the positioning block of the horizontal pipe, and fix the other end of the support pipe to the outer wall of the cast iron pipe to be installed through the mounting plate. S3. Install the electric hoist traction structure and control module on both sides of the lower end of the fastening ring, so that the control modules on both sides are symmetrically distributed about the axis of the installed cast iron pipe; S4. Secure the fixing hook at one end of the traction seat to the horizontal pipe by wrapping it with a strap, so that the traction chains of the electric hoist traction structures on both sides are connected to the horizontal pipe. S5. The control module sends a synchronous traction command to the traction structures of the electric hoists on both sides. The traction structures of the electric hoists on both sides tighten the traction chain synchronously. Through the traction seat and the binding belt, the horizontal pipe moves along the axial direction of the cast iron pipe to be installed towards the installed cast iron pipe, so that the spigot end of the cast iron pipe to be installed gradually enters the socket end of the installed cast iron pipe, and the matching assembly is completed.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention discloses a large-diameter cast iron pipe traction device and method. A horizontal pipe and a support pipe are assembled and fixed to one side of the socket end of the cast iron pipe to be installed. The horizontal pipe is detachably connected to the cast iron pipe via the support pipe, constructing a stable lateral support system. The detachable connection between the support pipe and the horizontal pipe allows for quick disassembly and transfer to the next work point, significantly improving construction efficiency. A fastening ring is installed on one side of the installed cast iron pipe, and a support seat structure with a sliding groove is installed inside the fastening ring. The upper end of the support seat slides into the groove via adjusting bolts, and the lower end has a rubber disc that abuts against the wall of the cast iron pipe. This allows for... The clamping position is adaptively adjusted according to the different diameters of cast iron pipes, achieving universal clamping for pipes of different specifications. By symmetrically setting control modules and electric hoist traction structures on both sides of the lower end of the fastening ring, and connecting the electric hoist traction structures on both sides to the horizontal pipe through chains and traction seats, the synchronous and balanced application of traction force on both sides is achieved, avoiding pipe skewing and uneven joint gap caused by uneven force on one side, effectively improving the sealing performance of the socket joint. By setting limit rollers and rubber pads, precise positioning and clamping of the horizontal pipe and the end face of the cast iron pipe are achieved, ensuring the coaxiality of the pipes during the docking process, and further improving the docking installation accuracy. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the main view of the installation and use state of a large-diameter cast iron pipe traction device disclosed in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the horizontal tube portion of a large-diameter cast iron pipe traction device disclosed in an embodiment of the present invention; Figure 3 This is a schematic diagram of the right view of the fastening circlip portion of a large-diameter cast iron pipe traction device disclosed in an embodiment of the present invention; Figure 4 This is a schematic diagram of the left view of the positioning guard plate portion of a large-diameter cast iron pipe traction device disclosed in an embodiment of the present invention.

[0018] Among them, 1. horizontal pipe; 2. support pipe; 3. electric hoist traction structure; 4. control module; 5. fastening ring; 101. Mounting rod; 102. Fixing base; 103. Limiting wheel; 104. Handwheel; 201. Mounting plate; 202. Rubber pad; 301. Traction seat; 302. Support plate; 401. Control panel; 402. Wireless transceiver module; 403. Hook; 404. Fixing cable; 501, Support base; 502, Slide groove; 503, Adjusting bolt. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] The technical solutions disclosed in the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0021] Example 1 like Figures 1 to 4 As shown, this embodiment provides a large-diameter cast iron pipe fitting and traction device, including a horizontal pipe 1 and a fastening ring 5. The horizontal pipe 1 is disposed on one side of the socket end of the cast iron pipe to be installed. The horizontal pipe 1 is detachably assembled and fixed to the cast iron pipe to be installed through a support pipe 2. The horizontal pipe 1 is used to provide lateral support perpendicular to the axial direction of the cast iron pipe to be installed. The fastening ring 5 is semi-circular and is disposed on one side of the socket end of the installed cast iron pipe. The fastening ring 5 covers the upper end of the outer wall of the installed cast iron pipe. The fastening ring 5 can be made of steel plate with a certain degree of elasticity, bent into shape, and its inner wall contour is adapted to the shape of the outer wall of the cast iron pipe.

[0022] Control modules 4 are fixedly installed on both sides of the lower end of the fastening ring 5, and the control modules 4 on both sides are symmetrically distributed about the axis of the installed cast iron pipe. An electric hoist traction structure 3 is fixedly installed on the side of each control module 4 closest to the horizontal pipe 1. The electric hoist traction structure 3 is electrically connected to the corresponding control module 4 via wiring. The electric hoist traction structure 3 is a miniature electric hoist in the prior art, which internally contains a drive motor, a reducer, a drum, and a traction chain. The drive motor drives the drum to rotate through the reducer, realizing the winding and unwinding of the traction chain. Each electric hoist traction structure 3 is connected to a traction seat 301 via chain drive. One end of the traction seat 301 is equipped with a fixing hook, which is fixedly connected to the horizontal pipe 1 by a binding strap. The binding strap can be made of high-strength nylon braided strap or steel wire rope. The electric hoist traction structures 3 on both sides are used to apply synchronous lateral traction force to drive the cast iron pipe to be installed to move along its axis towards the installed cast iron pipe, realizing the mating assembly.

[0023] A groove 502 is provided on the fastening ring 5, extending circumferentially along the fastening ring 5. A support seat 501 is provided between the groove 502 and the outer wall of the installed cast iron pipe. An adjusting bolt 503 is provided at the upper end of the support seat 501, passing through the groove 502 and threadedly engaging with the support seat 501. The support seat 501 is slidably connected to the groove 502 via the adjusting bolt 503; that is, when the adjusting bolt 503 is loosened, the support seat 501 can slide along the groove 502; when the adjusting bolt 503 is tightened, the support seat 501 is fixed in the predetermined position of the groove 502. A rubber disc is fixedly provided at the lower end of the support seat 501, abutting against the outer wall surface of the installed cast iron pipe. The rubber disc is made of wear-resistant rubber material, which can produce elastic deformation when it abuts against the wall surface of the cast iron pipe, increasing the contact area and friction, thereby improving the connection strength between the fastening ring 5 and the installed cast iron pipe.

[0024] like Figure 2 As shown, the horizontal tube 1 includes two sets of parallel mounting rods 101. Each mounting rod 101 has a positioning block at both ends, and the two sets of mounting rods 101 are connected by the positioning blocks. The positioning block has an L-shaped structure, and its inner right-angled surface is used to abut against the end face of the cast iron pipe to be installed, thereby achieving vertical positioning of the horizontal tube 1 and the end face of the cast iron pipe to be installed. A fixing seat 102 is fixedly installed on the inner side of the horizontal tube 1. The fixing seat 102 can be fixed to the inner side of the mounting rods 101 by welding or bolting. A limiting wheel 103 is provided on the side of the fixing seat 102 near the cast iron pipe to be installed. The limiting wheel 103 is slidably connected to the fixing seat 102 via a slide rail. Specifically, a slide rail groove extending horizontally is provided on the fixing seat 102, and one end of the wheel axle of the limiting wheel 103 is slidably disposed in the slide rail groove.

[0025] A screw is provided on the side of the limiting wheel 103 away from the positioning block, and a handwheel 104 is rotatably connected to the side of the fixed base 102 away from the limiting wheel 103. One end of the shaft of the handwheel 104 is engaged with the screw via a helical gear. Specifically, a first helical gear is fixedly provided on the shaft of the handwheel 104, and a second helical gear is fixedly provided at the end of the screw. The first and second helical gears mesh with each other. When the handwheel 104 is rotated, the shaft of the handwheel 104 drives the first helical gear to rotate, the first helical gear drives the second helical gear to rotate, and the second helical gear drives the screw to rotate. The screw is threadedly engaged with the axle of the limiting wheel 103, thereby driving the limiting wheel 103 to slide along the slide rail to adjust the distance between the limiting wheel 103 and the inner wall of the cast iron pipe to be installed. A rubber tire is fixedly fitted on the outer side of the limiting wheel 103. The outer surface of the rubber tire is provided with anti-slip texture, and the rubber tire is used to roll and engage with the sealing sleeve of the inner wall of the cast iron pipe to be installed. The limiting wheel 103 works in conjunction with the positioning block to clamp and position the cast iron pipe to be installed.

[0026] The positioning block has mounting holes on its inner side, through which the support tube 2 is detachably inserted and engaged with the positioning block. There are four sets of support tubes 2, symmetrically distributed with the axis of the horizontal tube 1 as the reference. Two sets of support tubes 2 are arranged vertically side-by-side on each side of the horizontal tube 1. Each support tube 2 has a mounting plate 201 at one end near the outer wall of the cast iron pipe to be installed. The mounting plate 201 is detachably connected to the support tube 2 by bolts and is used to abut and limit the movement against the outer wall of the cast iron pipe to be installed. A rubber pad 202 is fixedly installed on the side of the mounting plate 201 near the cast iron pipe to be installed. The end of the rubber pad 202 has an arc-shaped notch that matches the outer contour of the cast iron pipe to be installed. The rubber pad 202 is used for positioning and engaging with the outer wall surface of the cast iron pipe to be installed.

[0027] The mounting rod 101 has through holes at both ends. After the cable passes around the outer wall of the cast iron pipe to be installed, its two ends are connected to the through holes at both ends of the mounting rod 101. Then the cable is connected to the support pipe 2, so that the tension of the cable is used to tighten the horizontal pipe, the support pipe and the pipe wall to form a stable triangular force structure.

[0028] A level is fixedly installed on the side of the mounting rod 101 away from the cast iron pipe to be installed. The level is set parallel to the mounting rod 101 and is used to indicate the horizontal state of the mounting rod 101.

[0029] like Figure 3 As shown, the control module 4 has a rectangular box structure, which houses a control circuit board and a power module. A control panel 401 is located on the side of the control module 4 furthest from the installed cast iron pipe. The control panel 401 is electrically connected to the control circuit board via wiring. The control panel 401 includes a start button, a stop button, a speed adjustment knob, and an emergency stop button, used to send control commands to the electric hoist traction structure 3. A chain telescopic dust cover is fixedly installed at the lower end of the electric hoist traction structure 3, covering the outside of the traction chain to house the chain and prevent dust from entering. A wireless signal transceiver module 402 is fixedly installed on the side of the control module 4 furthest from the electric hoist traction structure 3. The wireless signal transceiver module 402 is electrically connected to the control circuit board via wiring and is used to receive remote control signals to control the equipment operation. The wireless signal transceiver module 402 can be a Bluetooth module, a WiFi module, or a radio remote control module.

[0030] Two sets of hooks 403 are fixedly installed at the lower end of the control module 4. The hooks 403 are used to detachably connect to one end of the fixing cable 404. The fixing cable 404 is used to wrap around the outer wall of the installed cast iron pipe to improve the connection strength between the fastening ring 5 and the installed cast iron pipe. Specifically, one end of the fixing cable 404 is connected to the hook 403 at the lower end of one side of the control module 4, the middle section of the fixing cable 404 passes under the installed cast iron pipe, and the other end of the fixing cable 404 is connected to the hook 403 at the lower end of the other side of the control module 4, thereby tightly fixing the fastening ring 5 to the installed cast iron pipe.

[0031] Two sets of fastening retaining rings 5 ​​are arranged side-by-side along the axial direction of the installed cast iron pipe, with the two sets of fastening retaining rings 5 ​​spaced apart. Each fastening retaining ring 5 is provided with a sliding groove 502, and each support seat 501 is provided with two sets of adjusting bolts 503. Each support seat 501 is slidably connected to the two sliding grooves 502 through the two sets of adjusting bolts 503. The width of the support seat 501 along the axial direction of the installed cast iron pipe is greater than the width of the fastening retaining ring 5, that is, the support seat 501 protrudes from the two side edges of the fastening retaining ring 5 to increase the contact area with the wall of the cast iron pipe and improve the support stability.

[0032] The following combination Figures 1 to 4 The installation and operation process of this invention will be described in detail.

[0033] Before performing the alignment and installation work, the device must first be installed and secured. The operator places two sets of fastening rings 5 ​​sequentially over the upper outer wall of the socket end of the installed cast iron pipe, ensuring the inner wall of the fastening rings 5 ​​fits against the outer wall of the pipe. Then, the adjusting bolts 503 on each support 501 are loosened, allowing the support 501 to slide along the groove 502 to a suitable position abutting against the outer wall of the installed cast iron pipe. At this point, the rubber disc at the lower end of the support 501 is in tight contact with the outer wall of the cast iron pipe. Finally, the adjusting bolts 503 are tightened to fix the support 501 at this position in the groove 502, thus achieving a fixed connection between the fastening rings 5 ​​and the installed cast iron pipe. Then, one end of the fixing cable 404 is connected to the hook 403 at the lower end of the control module 4 on one side, the middle section of the fixing cable 404 is passed around the bottom of the installed cast iron pipe, and the other end of the fixing cable 404 is connected to the hook 403 at the lower end of the control module 4 on the other side, further securing the fastening ring 5 to the installed cast iron pipe tightly.

[0034] Next, install the horizontal tube 1. Position the horizontal tube 1 on one side of the socket end of the cast iron pipe to be installed, ensuring the positioning blocks at both ends of the two sets of mounting rods 101 abut against the end face of the cast iron pipe to achieve vertical positioning. Then, rotate the handwheel 104. The shaft of the handwheel 104 drives the screw to rotate via a helical gear. The screw drives the limiting wheel 103 to slide along the slide rail towards the inner wall of the cast iron pipe to be installed, until the rubber pad on the outer side of the limiting wheel 103 rolls into contact with the sealing sleeve on the inner wall of the cast iron pipe. At this point, the limiting wheel 103 cooperates with the positioning block to clamp and position the cast iron pipe to be installed. Then, observe the level on the mounting rod 101 and adjust the horizontal tube 1 according to its indication to keep it level.

[0035] Subsequently, one end of each of the four sets of support tubes 2 is inserted into the mounting holes inside the positioning blocks, allowing the support tubes 2 to engage with the positioning blocks. The other end of the support tube 2 is then placed against the outer wall of the cast iron pipe to be installed via the mounting plate 201, ensuring that the arc-shaped notch at the end of the rubber pad 202 fits tightly against the outer contour of the cast iron pipe. The mounting plate 201 is then fixedly connected to the support tube 2 using bolts. At this point, the horizontal pipe 1 is detachably assembled and fixed to the cast iron pipe to be installed via the support tubes 2, forming a stable lateral support system.

[0036] Then, the electric hoist traction structure 3 and control module 4 are installed on both sides of the lower end of the fastening ring 5, so that the control modules 4 on both sides are symmetrically distributed about the axis of the installed cast iron pipe. The fixing hook at one end of the traction seat 301 is fixedly connected to the horizontal pipe 1 by wrapping it with a strap, so that the traction chains of the electric hoist traction structures 3 on both sides are connected to the horizontal pipe 1 through the traction seat 301 and the strap.

[0037] After completing the above installation steps, the alignment and traction operation can be performed. The operator sends remote control commands to the traction structures 3 on both sides of the electric hoist via the control panel 401 on the control module 4 or via the wireless signal transceiver module 402. The traction structures 3 on both sides start synchronously, and the drive motor drives the drum to rotate through the reducer, simultaneously tightening the traction chain. The traction chain pulls the horizontal pipe 1 through the traction seat 301 and the binding strap. The horizontal pipe 1, through the support pipe 2, moves the cast iron pipe to be installed axially towards the already installed cast iron pipe. During this process, the traction structures 3 on both sides maintain the same traction speed to ensure that the cast iron pipe to be installed moves in a straight line without deviation. As traction continues, the spigot end of the cast iron pipe to be installed gradually enters the socket end of the already installed cast iron pipe until the alignment and assembly are completed.

[0038] During the traction process, the tension sensor installed inside the electric hoist traction structure 3 detects the tension value of the traction chain in real time and transmits the tension signal to the control circuit board of the control module 4. When the tension value on one side exceeds the preset safety threshold, the control circuit board controls the electric hoist traction structure 3 on that side to decelerate or stop running. At the same time, an alarm signal can be issued through the control panel 401 or the wireless signal transceiver module 402 to realize the overload protection function and avoid pipeline deflection or equipment damage due to uneven force.

[0039] After the installation of a set of cast iron pipes is completed, the device needs to be disassembled and moved. The operator first unties the straps on the fixing hook of the traction seat 301, separating the electric hoist traction structure 3 from the horizontal pipe 1. Then, loosen the bolts on the mounting plate 201 to separate the support pipe 2 from the mounting plate 201, and pull the support pipe 2 out of the mounting hole of the positioning block, completing the disassembly of the horizontal pipe 1 and the support pipe 2. Next, untie the fixing cable 404, loosen the adjusting bolt 503, and allow the support seat 501 to slide along the slide groove 502 to a position detached from the outer wall of the installed cast iron pipe. The fastening ring 5 is then removed from the installed cast iron pipe. The entire disassembly process is simple and quick. The disassembled horizontal pipe 1, support pipe 2, fastening ring 5, control module 4, and electric hoist traction structure 3 can be transferred as a whole to the next work point, and the above installation steps can be repeated for the next set of cast iron pipes to be installed.

[0040] Example 2 This embodiment provides a method for traction of large-diameter cast iron pipes, based on a large-diameter cast iron pipe traction device from Embodiment 1, including the following steps: S1. Place the fastening ring 5 around the upper end of the outer wall of the socket end of the installed cast iron pipe, adjust the bolt 503, and let the support 501 slide along the slide groove 502 to the position that abuts against the outer wall of the installed cast iron pipe, and fix the fastening ring 5 to the installed cast iron pipe. S2. Place the horizontal pipe 1 on one side of the socket end of the cast iron pipe to be installed, insert one end of the support pipe 2 into the positioning block of the horizontal pipe 1, and fix the other end of the support pipe 2 to the outer wall of the cast iron pipe to be installed through the mounting plate 201. S3. Install the electric hoist traction structure 3 and control module 4 on both sides of the lower end of the fastening ring 5, so that the control modules 4 on both sides are symmetrically distributed about the axis of the installed cast iron pipe. S4. Secure the fixed hook at one end of the traction seat 301 to the horizontal tube 1 by wrapping it with a strap, so that the traction chains of the electric hoist traction structures 3 on both sides are connected to the horizontal tube 1. S5. The control module 4 sends a synchronous traction command to the electric hoist traction structure 3 on both sides. The electric hoist traction structure 3 on both sides tightens the traction chain synchronously. Through the traction seat 301 and the binding belt, the horizontal pipe 1 moves along the axial direction of the cast iron pipe to be installed towards the installed cast iron pipe, so that the spigot end of the cast iron pipe to be installed gradually enters the socket end of the installed cast iron pipe, and the matching assembly is completed.

[0041] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A large-diameter cast iron pipe alignment and traction device, characterized in that, Includes a horizontal tube (1) and a fastening ring (5), wherein the horizontal tube (1) is detachably connected to the socket end of the cast iron pipe to be installed, and is used to provide lateral support perpendicular to the axial direction of the cast iron pipe to be installed; The fastening ring (5) is semi-circular and covers the upper part of the outer wall of the socket end of the installed cast iron pipe. Each of its free ends is provided with a control module (4). Each control module (4) is provided with an electric hoist traction structure (3) on the side near the horizontal pipe (1). The electric hoist traction structure (3) is electrically connected to the corresponding control module (4). Each electric hoist traction structure (3) is connected to a traction seat (301) through chain transmission. One end of the traction seat (301) is provided with a fixing hook. The two fixing hooks are respectively connected to the two sides of the horizontal pipe (1). The fastening ring (5) has a groove (502) extending circumferentially along the fastening ring (5). A support seat (501) is provided between the groove (502) and the outer wall of the cast iron pipe. An adjusting bolt (503) is provided at the upper end of the support seat (501). The support seat (501) slides with the groove (502) through the adjusting bolt (503). A rubber disc is provided at the lower end of the support seat (501). The rubber disc abuts against the outer wall surface of the installed cast iron pipe.

2. The large-diameter cast iron pipe traction device as described in claim 1, characterized in that, The horizontal tube (1) includes two sets of parallel mounting rods (101). The two ends of the mounting rods (101) are provided with positioning blocks. The two sets of mounting rods (101) are assembled and connected through the positioning blocks. The positioning blocks are used to abut against the outer wall of the cast iron pipe to be installed. A fixed seat (102) is provided on the inner side of the horizontal tube (1). A limiting wheel (103) is provided on the side of the fixed seat (102) near the cast iron pipe to be installed. The limiting wheel (103) is slidably engaged with the fixed seat (102) through a slide rail. A screw is provided on the side of the limiting wheel (103) away from the positioning block. A handwheel (104) is rotatably connected on the side of the fixed seat (102) away from the limiting wheel (103). One end of the rotating shaft of the handwheel (104) is engaged with the screw through a helical gear. When the handwheel (104) is rotated, the limiting wheel (103) is driven to slide along the slide rail to adjust the distance between the limiting wheel (103) and the inner wall of the cast iron pipe to be installed.

3. The large-diameter cast iron pipe traction device as described in claim 2, characterized in that, A rubber tire is fixedly fitted on the outer side of the limiting wheel (103). The outer surface of the rubber tire is provided with anti-slip texture. The rubber tire is used to roll and cooperate with the sealing sleeve of the inner wall of the cast iron pipe to be installed. The limiting wheel (103) cooperates with the positioning block to realize the clamping and positioning of the cast iron pipe to be installed.

4. The large-diameter cast iron pipe traction device as described in claim 2, characterized in that, The positioning block has an installation hole, and the support tube (2) is detachably inserted into the positioning block through the installation hole. There are four sets of support tubes (2), which are symmetrically distributed with the axis of the horizontal tube (1) as the axis of symmetry. Two sets of support tubes (2) are arranged side by side on each side of the horizontal tube (1). Each support tube (2) has an installation plate (201) at one end near the outer wall of the cast iron pipe to be installed. The installation plate (201) is detachably connected to the support tube (2) by bolts. The installation plate (201) is used to abut and limit the movement against the outer wall of the cast iron pipe to be installed.

5. The large-diameter cast iron pipe traction device as described in claim 4, characterized in that, The mounting plate (201) has a rubber pad (202) on the side near the cast iron pipe to be installed. The end of the rubber pad (202) has an arc-shaped notch. The arc-shaped notch is adapted to the outer contour shape of the cast iron pipe to be installed. The rubber pad (202) is used to position and cooperate with the outer wall surface of the cast iron pipe to be installed.

6. The large-diameter cast iron pipe traction device as described in claim 1, characterized in that, The control module (4) is equipped with a control circuit board and a power module. A control panel (401) is provided on the side of the control module (4) away from the installed cast iron pipe. The control panel (401) is electrically connected to the control circuit board. The control panel (401) is used to send control commands to the electric hoist traction structure (3). A chain telescopic dust cover is fixedly provided at the lower end of the electric hoist traction structure (3). The chain telescopic dust cover is fitted on the outside of the traction chain and is used to store the traction chain.

7. The large-diameter cast iron pipe traction device as described in claim 6, characterized in that, The control module (4) is further provided with a wireless signal transceiver module (402), which is electrically connected to the control circuit board. The wireless signal transceiver module (402) is used to receive remote control signals to control the operation of the equipment.

8. The large-diameter cast iron pipe traction device as described in claim 6, characterized in that, The lower end of the control module (4) is fixedly provided with two sets of hooks (403). The hooks (403) are used to detachably connect to one end of the fixing cable (404). The fixing cable (404) is used to wrap around the outer wall of the installed cast iron pipe to improve the connection strength between the fastening ring (5) and the installed cast iron pipe.

9. The large-diameter cast iron pipe traction device as described in claim 1, characterized in that, Two sets of fastening rings (5) are arranged side by side along the axial direction of the installed cast iron pipe. The two sets of fastening rings (5) are spaced apart. Each fastening ring (5) is provided with a sliding groove (502). Two sets of adjusting bolts (503) are provided at the upper end of the support base (501). The support base (501) is slidably connected to the two sliding grooves (502) respectively through the two sets of adjusting bolts (503). The width of the support base (501) along the axial direction of the installed cast iron pipe is greater than the width of the fastening rings (5).

10. A method for traction of large-diameter cast iron pipe joints, characterized in that, A large-diameter cast iron pipe alignment and traction device according to any one of claims 1-9 includes the following steps: S1. Place the fastening ring (5) on the upper end of the outer wall of the socket end of the installed cast iron pipe, adjust the bolt (503) so that the support (501) slides along the slide groove (502) to the position of abutting against the outer wall of the installed cast iron pipe, and fix the fastening ring (5) to the installed cast iron pipe. S2. Place the horizontal pipe (1) on one side of the socket end of the cast iron pipe to be installed, insert one end of the support pipe (2) into the positioning block of the horizontal pipe (1), and fix the other end of the support pipe (2) to the outer wall of the cast iron pipe to be installed through the mounting plate (201). S3. Install the electric hoist traction structure (3) and control module (4) on both sides of the lower end of the fastening ring (5), so that the control modules (4) on both sides are symmetrically distributed about the axis of the installed cast iron pipe; S4. The fixing hook at one end of the traction seat (301) is fixedly connected to the horizontal pipe (1) by wrapping with a strap, so that the traction chains of the electric hoist traction structure (3) on both sides are connected to the horizontal pipe (1). S5. The control module (4) sends a synchronous traction command to the electric hoist traction structure (3) on both sides. The electric hoist traction structure (3) on both sides tightens the traction chain synchronously. The horizontal pipe (1) is driven to move along the axial direction of the cast iron pipe to be installed towards the installed cast iron pipe through the traction seat (301) and the binding belt, so that the spigot end of the cast iron pipe to be installed gradually enters the socket end of the installed cast iron pipe and completes the matching assembly.

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