Large-diameter PE corrugated pipe hot melting butt joint tool and construction method thereof

Abstract

The invention relates to the field of household daily necessities, in particular to a large-diameter PE corrugated pipe hot melting butt joint tool and a construction method thereof. The large-diameter PE corrugated pipe hot melting butt joint tool comprises a base, V-shaped clamping seats, an arc-shaped plate, a positioning assembly and a positioning plate, a grinding mechanism and a hot melting mechanism are installed at the top of the base, an installation frame is installed on the side wall of the middle of the base, and the V-shaped clamping seats are symmetrically installed at the top of the base. According to the hot melting butt joint tool for the large-diameter PE corrugated pipes, through the design of the positioning assembly, the V-shaped clamping base and the arc-shaped plate, radial positioning and clamping of the pipes with different pipe diameters are achieved, clamping parts do not need to be detached and replaced for the pipes with different specifications, the operation complexity is greatly reduced, and the construction universality is improved; and meanwhile, the clamping force is monitored in real time by means of the pressure sensor, deformation or displacement of the pipe is effectively prevented, the stability of the pipe in the hot melting and butt joint process is guaranteed, and the butt joint precision is improved.

Description

Technical Field

[0001] This invention relates to the field of household daily necessities, and in particular to a tooling for hot-melt butt welding of large-diameter PE corrugated pipes and its construction method. Background Technology

[0002] PE corrugated pipes, with their excellent corrosion resistance, impact resistance, flexibility, and ease of construction, have been widely used in many fields such as municipal drainage, gas transmission, industrial sewage discharge, and farmland irrigation. Among them, large-diameter PE corrugated pipes, due to their large flow capacity, have become one of the core pipe materials in the construction of municipal underground pipe networks. During the laying of large-diameter PE corrugated pipes, the sealing and firmness of the pipe joints directly determine the operational stability of the pipe network system. If there are gaps at the joints, it is easy to cause safety hazards such as leakage and pipe detachment, which not only affects the normal use of the pipe network, but may also cause secondary disasters such as soil pollution and road collapse. Therefore, the requirements for hot-melt butt welding process and supporting tooling are extremely stringent. Hot-melt butt welding is the most common butt welding method for large-diameter PE corrugated pipes. Its principle is to heat the butt joint surfaces of the two pipes to a molten state through a heating device, and then apply a certain pressure to make the two end faces fit together and cool and solidify to form an integrated sealed structure. However, existing hot-melt butt welding fixtures for large-diameter PE corrugated pipes still have many technical defects in practical applications. Specifically, the pipe positioning and clamping mechanisms of existing fixtures have poor adaptability; large-diameter PE corrugated pipes come in various specifications, and different pipe diameters and wall thicknesses require corresponding clamping components. Traditional fixtures are mostly designed with fixed dimensions, and when changing pipes, it is necessary to disassemble and replace the clamping components, which is cumbersome, time-consuming, and labor-intensive, seriously affecting construction efficiency; at the same time, some adjustable clamping mechanisms use manual adjustment, and the clamping force is difficult to control precisely. If the force is too small, the pipe may be displaced during the hot-melt and butt welding process, affecting the butt welding accuracy; if the force is too large, it may cause the sidewall of the pipe to be squeezed and deformed, damaging the structural integrity of the pipe.

[0003] Therefore, it is necessary to provide a new tooling for hot-melt butt welding of large-diameter PE corrugated pipes to solve the above-mentioned technical problems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a tooling for hot-melt butt welding of large-diameter PE corrugated pipes and its construction method.

[0005] The large-diameter PE corrugated pipe hot-melt butt welding fixture provided by the present invention includes: a base, a V-shaped clamp, an arc plate, a positioning component, and a positioning plate. A grinding mechanism and a hot-melt mechanism are installed on the top of the base. A mounting frame is installed on the middle side wall of the base. V-shaped clamps are symmetrically installed on the top of the base. Arc plates corresponding to the V-shaped clamps are symmetrically arranged above the base. A positioning component is installed between the base and the arc plate. The positioning component drives the arc plate to move to clamp corrugated pipes of different sizes. A positioning plate is symmetrically installed on one side of the mounting frame.

[0006] Preferably, the positioning component includes: an electric push rod, a connecting frame, and a telescopic frame. The electric push rod is fixedly connected to the top of the mounting frame, and the connecting frame is fixedly connected to its output end. A placement groove is opened inside one end of the connecting frame, and a spring is fixedly connected to the inner wall of the placement groove. The telescopic frame is fixedly connected to the other end of the spring, and one end of the telescopic frame is placed inside the placement groove and slidably connected to its inner wall.

[0007] Preferably, the connecting frame and the telescopic frame are slidably connected to each other at their opposite ends. The bottom end of each guide rod is fixedly connected to the corresponding arc plate. The outer wall of each guide rod is fitted with a second spring. The bottom end of each second spring is fixedly connected to the side wall of the corresponding arc plate. The top end of one second spring is fixedly connected to the side wall of the telescopic frame, and the top end of the other second spring is fixedly connected to the side wall of the connecting frame.

[0008] Preferably, pressure sensors are installed at the top of the ends of the connecting frame and the telescopic frame that are far apart from each other, and their pressure-bearing diaphragms are placed between the bottom end of the corresponding spring and the side wall of the arc-shaped plate.

[0009] Preferably, a slide rail is symmetrically fixedly connected to the top of one end of the base near the telescopic frame, and a set of V-shaped brackets near the slide rail are slidably connected to it. An electric push rod is fixedly connected to the top of the base, and its output end is fixedly connected to the bottom of a set of V-shaped brackets near the slide rail.

[0010] Preferably, a motor is fixedly connected to the bottom side wall of the mounting bracket, and a shaft is fixedly connected to its output end. The bottom ends of the two positioning plates are fixedly sleeved on the outer wall of the shaft.

[0011] Preferably, the base has symmetrically fixed support frames on its side walls, and a rotating rod is rotatably connected to the top of the support frame. A motor is fixedly connected to the top side wall of one of the support frames, and its output end is fixedly connected to the end of the rotating rod. Sliding sleeves are symmetrically slidably connected to the outer wall of the rotating rod, and a bar is fixedly connected to the middle outer wall of the rotating rod. The sliding sleeves are all provided with grooves that match the bar. The grinding mechanism is fixedly connected to the side wall of one of the sliding sleeves, and the hot-melt mechanism is fixedly connected to the side wall of the other sliding sleeve.

[0012] Preferably, the top of the support frame is symmetrically fixedly connected with limiting rods, and one of the limiting rods, which is far from the mounting frame, has a notch in its middle that corresponds to the bar.

[0013] Preferably, a motor is fixedly connected to the side wall near the top of the mounting bracket, and a gear is fixedly connected to its output end. A rack meshes with the top of the gear, and a collar is rotatably fitted on the outer wall of both sliding sleeves. Both ends of the rack are fixedly connected to the side wall of the corresponding collar.

[0014] A construction method for a hot-melt butt welding fixture for large-diameter PE corrugated pipes, the construction method comprising the following steps: S1: Start motor one, drive the positioning plate to rotate 90 degrees to be perpendicular to the mounting bracket, place the corrugated pipes to be connected into the corresponding V-shaped brackets, so that the ends of the corrugated pipes contact the corresponding positioning plates. S2: Start the electric push rod one, which drives the connecting frame and telescopic frame to move down, driving the corresponding arc plate to contact the side wall of the bellows. The pressure sensor monitors the pressure value in real time. After reaching the preset threshold, the electric push rod one is controlled to stop running. Then, the motor one is started to reverse, driving the positioning plate to reset. S3: Start motor three, drive the corresponding sliding sleeve to move through the meshing of gears and racks, so that the grinding mechanism moves to the middle of the rotating rod. At this time, the sliding groove inside the sliding sleeve corresponding to the grinding mechanism engages with the bar rod, and the hot melt mechanism and the corresponding sliding sleeve move away from the bar rod. S4: Start motor two, drive the rotating rod to rotate. With the cooperation of the bar and the slide groove, the grinding mechanism rotates 180 degrees and is placed between the two ends of the corrugated tube. Start electric push rod two to drive the corresponding V-shaped card seat and the corrugated tube fixed inside it to fit the grinding mechanism. Then start the grinding mechanism to start grinding. S5: After grinding is completed, the electric push rod two retracts a certain distance, the motor two reverses and drives the grinding mechanism to reset. Then the motor three starts and reverses, causing the hot melt mechanism to move to the middle of the rotating rod. At this time, the sliding groove inside the sliding sleeve corresponding to the hot melt mechanism engages with the bar. Then the motor two starts again, driving the hot melt mechanism to rotate 180 degrees to start the hot melt operation. S6: After the hot melt is completed, motor two reverses, driving the hot melt mechanism to reset, starting electric push rod two, driving the corresponding V-shaped bracket and the corrugated tube fixed inside it to fit with the end face of another corrugated tube. After cooling, the positioning component resets and the corrugated tube after docking is taken out.

[0015] Compared with related technologies, the large-diameter PE corrugated pipe hot-melt butt welding fixture provided by the present invention has the following beneficial effects: By incorporating positioning components and the design of V-shaped brackets and arc plates, radial positioning and clamping of pipes of different diameters can be achieved. This eliminates the need to disassemble and replace clamping components for different pipe specifications, significantly reducing operational complexity and improving construction versatility. Simultaneously, the clamping force is monitored in real time by a pressure sensor. When the pressure value reaches a preset threshold, the electric push rod stops operating, effectively preventing pipe deformation or displacement. This avoids the problem of inaccurate clamping force control in traditional adjustable clamping mechanisms that rely on manual adjustment, ensuring the stability of the pipes during hot melting and butt welding processes and improving welding accuracy.

[0016] The grinding and hot-melting mechanisms are precisely switched and positioned using a rotating rod, sliding sleeves, and a gear and rack structure. The motor starts in three stages, driving two sliding sleeves along the outer wall of the rotating rod via the gear and rack, moving either the grinding or hot-melting mechanism to the designated position. The corresponding sliding sleeve's internal groove precisely engages with the bar in the middle of the rotating rod, ensuring stability and accuracy during switching, preventing interference between mechanisms, and guaranteeing the smooth operation of both grinding and hot-melting processes. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the large-diameter PE corrugated pipe hot-melt butt welding tooling provided by the present invention; Figure 2 for Figure 1 The diagram shows the structure of the arc-shaped plate. Figure 3 for Figure 2 The diagram shows the structure at point A. Figure 4 for Figure 1 The diagram shows the structural schematic of the side of the base. Figure 5 for Figure 4 The diagram shows the structure at point B. Figure 6 for Figure 4 The diagram shows the structure of the rotating rod. Figure 7 for Figure 6 The diagram shows the structure at point C.

[0018] The following are the labeling elements in the diagram: 1. Base; 2. Grinding mechanism; 3. Hot melt mechanism; 4. V-shaped bracket; 5. Arc plate; 6. Positioning plate; 7. Mounting bracket; 8. Electric push rod one; 9. Connecting bracket; 10. Telescopic bracket; 11. Spring one; 12. Guide rod; 13. Spring two; 14. Pressure sensor; 15. Slide rail; 16. Electric push rod two; 17. Motor one; 18. Support frame; 19. Rotating rod; 20. Motor two; 21. Sliding sleeve; 22. Bar rod; 23. Slide groove; 24. Limiting rod; 25. Motor three; 26. Gear; 27. Rack; 28. Collar. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] The specific implementation of the present invention will be described in detail below with reference to specific embodiments. Example

[0021] Please see Figures 1 to 7 A large-diameter PE corrugated pipe hot-melt butt welding fixture is disclosed. The fixture includes: a base 1, a V-shaped clamp 4, an arc plate 5, a positioning component, and a positioning plate 6. A grinding mechanism 2 and a hot-melt mechanism 3 are installed on the top of the base 1. A mounting frame 7 is installed on the middle side wall of the base 1. The V-shaped clamp 4 is symmetrically installed on the top of the base 1. The arc plate 5 corresponding to the V-shaped clamp 4 is symmetrically arranged above the base 1. A positioning component is installed between the base 1 and the arc plate 5. The positioning component drives the arc plate 5 to move to clamp corrugated pipes of different sizes. The positioning plate 6 is symmetrically installed on one side of the mounting frame 7.

[0022] The positioning assembly includes: an electric push rod 8, a connecting frame 9, and a telescopic frame 10. The top of the mounting frame 7 is fixedly connected to the electric push rod 8, and its output end is fixedly connected to the connecting frame 9. One end of the connecting frame 9 has a placement groove inside, and the inner wall of the placement groove is fixedly connected to a spring 11. The other end of the spring 11 is fixedly connected to the telescopic frame 10. One end of the telescopic frame 10 is placed inside the placement groove and is slidably connected to its inner wall.

[0023] Guide rods 12 are slidably connected inside the ends of the connecting frame 9 and the telescopic frame 10 that are far apart from each other. The bottom ends of the guide rods 12 are fixedly connected to the corresponding arc-shaped plates 5. Springs 13 are sleeved on the outer walls of the guide rods 12. The bottom ends of the springs 13 are fixedly connected to the side walls of the corresponding arc-shaped plates 5. The top end of one spring 13 is fixedly connected to the side wall of the telescopic frame 10, and the top end of the other spring 13 is fixedly connected to the side wall of the connecting frame 9.

[0024] Pressure sensors 14 are installed at the top of the ends of the connecting frame 9 and the telescopic frame 10 that are far apart from each other. The pressure-bearing diaphragms are placed between the bottom end of the corresponding spring 13 and the side wall of the arc plate 5. The parameters of the pressure sensors 14 are set according to the pipe diameter and wall thickness to ensure that the clamping is firm and to avoid squeezing and deformation.

[0025] A slide rail 15 is symmetrically fixedly connected to the top of one end of the base 1 near the telescopic frame 10, and a set of V-shaped brackets 4 near the slide rail 15 is slidably connected to it. An electric push rod 16 is fixedly connected to the top of the base 1, and its output end is fixedly connected to the bottom of a set of V-shaped brackets 4 near the slide rail 15. Example

[0026] Please see Figures 2 to 7 A motor 17 is fixedly connected to the bottom side wall of the mounting bracket 7, and a shaft is fixedly connected to its output end. The bottom ends of the two positioning plates 6 are fixedly sleeved on the outer wall of the shaft.

[0027] Support frames 18 are symmetrically fixedly connected to the side walls of the base 1. A rotating rod 19 is rotatably connected to the top of the support frame 18. A motor 20 is fixedly connected to the top side wall of one of the support frames 18, and its output end is fixedly connected to the end of the rotating rod 19. Sliding sleeves 21 are symmetrically slidably connected to the outer wall of the rotating rod 19. A bar 22 is fixedly connected to the middle outer wall of the rotating rod 19. The sliding sleeves 21 are all provided with grooves 23 that are adapted to the bar 22. The grinding mechanism 2 is fixedly connected to the side wall of one of the sliding sleeves 21, and the hot-melt mechanism 3 is fixedly connected to the side wall of the other sliding sleeve 21.

[0028] The top of the support frame 18 is symmetrically fixedly connected with limit rods 24, and one of the limit rods 24, which is far away from the mounting frame 7, has a notch in its middle corresponding to the bar 22. The grinding mechanism 2 and the hot melting mechanism 3 are both placed between the two limit rods 24. The notch in the middle of one of the limit rods 24 is designed to make room for rotation when the grinding mechanism 2 or the hot melting mechanism 3 rotates.

[0029] A motor 25 is fixedly connected to the side wall near the top of the mounting bracket 7. A gear 26 is fixedly connected to the output end of the motor 25. A rack 27 meshes with the top of the gear 26. A collar 28 is rotatably fitted on the outer wall of each of the two sliding sleeves 21. Both ends of the rack 27 are fixedly connected to the side wall of the corresponding collar 28.

[0030] A construction method for a hot-melt butt welding fixture for large-diameter PE corrugated pipes, the construction method comprising the following steps: S1: Start motor 17, drive positioning plate 6 to rotate 90 degrees to be perpendicular to mounting bracket 7, place the corrugated pipes to be connected into the corresponding V-shaped bracket 4, so that the end of the corrugated pipe contacts the corresponding positioning plate 6. S2: Start the electric push rod 8, which drives the connecting frame 9 and the telescopic frame 10 to move down, driving the corresponding arc plate 5 to contact the side wall of the bellows. The pressure sensor 14 monitors the pressure value in real time. After reaching the preset threshold, the electric push rod 8 is controlled to stop running. Then, the motor 17 is started to reverse, driving the positioning plate 6 to reset. S3: Start motor 25, drive the corresponding sliding sleeve 21 to move through the meshing of gear 26 and rack 27, so that the grinding mechanism 2 moves to the middle of the rotating rod 19. At this time, the sliding groove 23 inside the sliding sleeve 21 corresponding to the grinding mechanism 2 engages with the bar 22, and the hot melt mechanism 3 and the corresponding sliding sleeve 21 move away from the bar 22. S4: Start motor 20, drive rotating rod 19 to rotate. With the cooperation of bar 22 and slide groove 23, the grinding mechanism 2 rotates 180 degrees and is placed between the bellows at the ends that are close to each other. Start electric push rod 16 to drive the corresponding V-shaped card seat 4 and the bellows fixed inside it to fit the grinding mechanism 2. Then start the grinding mechanism 2 to start grinding. S5: After grinding is completed, the electric push rod 16 retracts a certain distance, the motor 20 reverses and drives the grinding mechanism 2 to reset. Then the motor 3 25 starts to reverse, causing the hot melt mechanism 3 to move to the middle of the rotating rod 19. At this time, the sliding groove 23 inside the sliding sleeve 21 corresponding to the hot melt mechanism 3 engages with the bar 22. Then the motor 20 starts again, driving the hot melt mechanism 3 to rotate 180 degrees to start the hot melt operation. S6: After the hot melt is completed, motor 20 reverses, driving the hot melt mechanism 3 to reset, starting electric push rod 16, driving the corresponding V-shaped bracket 4 and the corrugated pipe fixed inside it to fit with the end face of another corrugated pipe. After cooling, the positioning component resets and the corrugated pipe after docking is taken out.

[0031] The working principle of the large-diameter PE corrugated pipe hot-melt butt welding fixture provided by this invention is as follows: First, start the motor 17 on the bottom side wall of the mounting bracket 7. The output end of the motor 17 drives the shaft to rotate synchronously. Since the bottom ends of the two positioning plates 6 are fixedly sleeved on the outer wall of the shaft, the shaft rotation drives the positioning plates 6 to rotate 90 degrees until the positioning plates 6 are perpendicular to the mounting bracket 7. At this time, the positioning plates 6 form an axial positioning reference surface, which is used to limit the initial position of the pipe end face. Two large-diameter PE corrugated pipes to be joined are respectively hoisted into the V-shaped brackets 4 symmetrically installed on the top of the base 1. The groove structure of the V-shaped brackets 4 can be adapted to pipes of different diameters. Gravity is used to achieve the initial radial positioning of the pipes. When placing them, the posture of the pipes needs to be adjusted so that the joint end faces of the two pipes are in close contact with the positioning plates 6 on the corresponding sides, ensuring that the two pipes are aligned in the axial direction and avoiding initial position deviation. The positioning component drives the arc plate 5 to cooperate with the V-shaped bracket 4 to achieve a firm clamping of pipes of different sizes. At the same time, the pressure sensor 14 monitors the clamping force in real time to prevent pipe deformation or displacement. Specifically, the electric push rod 8 fixed at the top of the mounting bracket 7 is activated. The output end of the electric push rod 8 extends downward, driving the connecting bracket 9 fixed to it to move down synchronously. The connecting bracket 9 drives the telescopic bracket 10 to move down together through the spring 11 in the internal placement groove, thereby driving the arc plate 5 connected to both ends of the connecting bracket 9 and the telescopic bracket 10 to move down synchronously. As the arc plate 5 continues to move downward, the inner wall of the arc plate 5 gradually approaches the side wall of the tube inside the V-shaped clamp 4. Since the arc plate 5 and the V-shaped clamp 4 correspond one-to-one, and the arc structure fits the outer wall of the tube well, uniform clamping with force in the entire circumference can be achieved. During this process, the connecting frame 9 and the telescopic frame 10 move away from the guide rod 12 that is internally slidably connected at one end. They slide synchronously along their own axis as the arc plate 5 moves downward. The guide rod 12 plays a guiding role, ensuring that the downward trajectory of the arc plate 5 is vertical and avoiding force deviation of the tube during clamping. The spring 13 sleeved on the outer wall of the guide rod 12 is compressed as the arc plate 5 moves down. The elastic force of the spring 13 can buffer the clamping impact. At the same time, the pressure sensor 14 at the top of the end of the connecting frame 9 and the telescopic frame 10 collects pressure data in real time. When the pressure value reaches the preset threshold, the pressure sensor 14 sends a signal to the control terminal. The control terminal commands the electric push rod 8 to stop running, and the clamping action is completed. After clamping and fixing, start motor 17 to reverse and drive positioning plate 6 to rotate and reset, detaching from the end face of the pipe, leaving operating space for subsequent grinding and hot melting processes. At this time, the pipe is only firmly fixed by the cooperation of V-shaped bracket 4 and arc plate 5, and maintains coaxiality. By coordinating the movement and rotation of the grinding mechanism 2 with the pipe feeding, the oxide layer, impurities, and uneven parts on the pipe mating end face are removed, ensuring that the roughness of the hot-melt front end face meets the mating requirements. This process relies on the rotating rod 19, sliding sleeve 21, and gear 26 and rack 27 structure to achieve precise switching and positioning of the mechanism. Specifically, the motor 25 near the top side wall of the mounting bracket 7 is started. The output end of the motor 25 drives the gear 26 to rotate. Since the gear 26 meshes with the rack 27 at the top, the rotation of the gear 26 drives the rack 27 to move horizontally. The two ends of the rack 27 drive two sliding sleeves through the collar 28. The sleeve 21 slides along the outer wall of the rotating rod 19 until the grinding mechanism 2 moves to the middle position of the rotating rod 19. At this time, the inner groove 23 of the sliding sleeve 21 corresponding to the grinding mechanism 2 precisely engages with the bar 22 in the middle of the rotating rod 19. The hot melt mechanism 3 moves with the corresponding sliding sleeve 21 to the side away from the bar 22 to avoid interfering with the grinding operation. The limiting rod 24 at the top of the support frame 18 can ensure the stability of the grinding mechanism 2 and the hot melt mechanism 3 during the movement. The notch in the middle of the limiting rod 24 away from the mounting frame 7 corresponds to the bar 22, providing space for the subsequent rotation of the grinding mechanism 2 or the hot melt mechanism. Next, the motor 20 on the top of one of the support frames 18 is started. The output end of the motor 20 drives the rotating rod 19 to rotate. Since the sliding sleeve 21 corresponding to the grinding mechanism 2 is engaged with the bar 22 through the groove 23, when the rotating rod 19 rotates, it drives the sliding sleeve 21 and the grinding mechanism 2 to rotate 180 degrees synchronously through the bar 22 until the grinding end face of the grinding mechanism 2 is placed between the end faces of the two pipes that are close to each other, and the grinding end face and the end face of the pipes remain parallel and coaxial, thus completing the posture adjustment of the grinding mechanism 2. The groove 23 inside the sliding sleeve 21 corresponding to the hot melt mechanism 3 is not engaged with the bar 22. Therefore, during the rotation of the rotating rod 19, under the restriction of the limit rod 24, the hot melt mechanism 3 will not rotate with the rotating rod 19. The electric push rod 16 at the top of the base 1 is activated. The output end of the electric push rod 16 extends, driving a set of V-shaped brackets 4 fixedly connected to it to move towards another set of fixed V-shaped brackets 4. This drives the tube fixed in the bracket to move closer to the grinding mechanism 2 until the end face of the tube is tightly fitted with the grinding component of the grinding mechanism 2. The grinding mechanism 2 is activated, and the end face of the tube is ground by the high-speed rotation of the grinding component. During the grinding process, the electric push rod 16 maintains a constant thrust to ensure that the end face is ground evenly. After removing the oxide layer and impurities, the electric push rod 16 retracts a certain distance, causing the end face of the tube to separate from the grinding mechanism 2. Motor 20 reverses, driving the rotating rod 19 and the grinding mechanism 2 to rotate 180 degrees to reset. Then, motor 3 25 reverses, driving the rack 27 to move the sliding sleeve 21, so that the grinding mechanism 2 returns to its initial position, making room for the switching of the hot melt mechanism 3. Using the same transmission logic as the grinding mechanism 2, the hot melt mechanism 3 is moved to a designated position, the end face of the ground pipe is heated to a molten state, and then the pipe is driven to fit together to complete the docking; specifically, the motor 3 25 starts to reverse again, and through the meshing transmission of the gear 26 and the rack 27, it drives the sliding sleeve 21 corresponding to the hot melt mechanism 3 to move along the rotating rod 19 to the middle position. At this time, the sliding groove 23 inside the sliding sleeve 21 is engaged with the bar 22, and the sliding sleeve 21 corresponding to the grinding mechanism 2 moves to the side away from the bar 22 to avoid interfering with the hot melt operation; Motor 20 starts, driving rotating rod 19 and hot melt mechanism 3 to rotate 180 degrees, so that the heating end face of hot melt mechanism 3 is placed between the end faces of the two pipes, and the heating end face is parallel and coaxial with the end faces of the pipes to ensure uniform heating; start electric push rod 216 to extend, driving the corresponding pipes to move closer to hot melt mechanism 3, so that the mating end faces of the two pipes are tightly attached to the heating end faces on both sides of hot melt mechanism 3. The hot melt temperature and time are set according to the material and diameter of PE corrugated pipe, and the end faces are heated until the end faces reach a molten state; After the heat fusion is completed, the electric push rod 16 retracts slightly, causing the end face of the pipe to separate from the heat fusion mechanism 3. Then, the motor 20 reverses, causing the heat fusion mechanism 3 to rotate 180 degrees to reset. The motor 3 25 starts and drives the heat fusion mechanism 3 back to its initial position. The electric push rod 16 continues to extend, causing the corresponding pipe to move towards another pipe, so that the molten end faces of the two pipes are tightly fitted together, maintaining the preset pressure and avoiding leakage due to gaps in the fit. Maintain the contact pressure until the pipe end face cools and sets. After cooling, the electric push rod 8 retracts, driving the connecting frame 9, telescopic frame 10 and arc plate 5 to move upward and reset, releasing the clamp on the pipe. Then, the PE corrugated pipe that has been joined is lifted and taken out from the fixture, completing a single joining operation. Next, the electric push rod 16 retracts and resets, driving the sliding side V-shaped bracket 4 back to its initial position. All parts of the fixture return to their initial state, waiting for the next operation.

[0032] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A tooling for hot-melt butt welding of large-diameter PE corrugated pipes, characterized in that, include: The base (1) has a grinding mechanism (2) and a hot melt mechanism (3) installed on its top, and a mounting bracket (7) installed on the middle side wall of the base (1). V-shaped bracket (4), V-shaped bracket (4) is symmetrically installed on the top of the base (1); Arc plate (5), and an arc plate (5) corresponding to the V-shaped card seat (4) is symmetrically provided above the base (1); A positioning component is installed between the base (1) and the arc plate (5). The positioning component drives the arc plate (5) to move, which is used to clamp corrugated pipes of different sizes. Positioning plate (6) is symmetrically installed on one side of the mounting bracket (7).

2. The large-diameter PE corrugated pipe hot-melt butt welding fixture according to claim 1, characterized in that, The positioning components include: an electric push rod (8), a connecting frame (9), and a telescopic frame (10). The top of the mounting frame (7) is fixedly connected to the electric push rod (8), and its output end is fixedly connected to the connecting frame (9). One end of the connecting frame (9) has a placement groove, and the inner wall of the placement groove is fixedly connected to a spring (11). The other end of the spring (11) is fixedly connected to the telescopic frame (10). One end of the telescopic frame (10) is placed inside the placement groove and is slidably connected to its inner wall.

3. The large-diameter PE corrugated pipe hot-melt butt welding fixture according to claim 2, characterized in that, The connecting frame (9) and the telescopic frame (10) are both slidably connected to the inner ends of their respective ends. The bottom ends of the guide rods (12) are fixedly connected to the corresponding arc plate (5). The outer walls of the guide rods (12) are fitted with springs (13). The bottom ends of the springs (13) are fixedly connected to the side walls of the corresponding arc plate (5). The top end of one spring (13) is fixedly connected to the side wall of the telescopic frame (10), and the top end of the other spring (13) is fixedly connected to the side wall of the connecting frame (9).

4. The large-diameter PE corrugated pipe hot-melt butt welding fixture according to claim 3, characterized in that, Pressure sensors (14) are installed at the top of the ends of the connecting frame (9) and the telescopic frame (10) that are far apart from each other. The pressure-bearing diaphragms are placed between the bottom end of the corresponding spring (13) and the side wall of the arc plate (5).

5. The large-diameter PE corrugated pipe hot-melt butt welding fixture according to claim 4, characterized in that, The top of the base (1) near the telescopic frame (10) is symmetrically fixed with a slide rail (15), and a set of V-shaped brackets (4) near the slide rail (15) is slidably connected to it. The top of the base (1) is fixedly connected with an electric push rod (16), and its output end is fixedly connected to the bottom of a set of V-shaped brackets (4) near the slide rail (15).

6. The large-diameter PE corrugated pipe hot-melt butt welding fixture according to claim 1, characterized in that, The bottom side wall of the mounting bracket (7) is fixedly connected to a motor (17), and its output end is fixedly connected to a shaft. The bottom ends of the two positioning plates (6) are fixedly sleeved on the outer wall of the shaft.

7. The large-diameter PE corrugated pipe hot-melt butt welding fixture according to claim 1, characterized in that, A support frame (18) is symmetrically fixedly connected to the side wall of the base (1). A rotating rod (19) is rotatably connected to the top of the support frame (18). A motor (20) is fixedly connected to the top side wall of one of the support frames (18). Its output end is fixedly connected to the end of the rotating rod (19). A sliding sleeve (21) is symmetrically slidably connected to the outer wall of the rotating rod (19). A bar (22) is fixedly connected to the middle outer wall of the rotating rod (19). A sliding groove (23) that matches the bar (22) is opened inside the sliding sleeve (21). The grinding mechanism (2) is fixedly connected to the side wall of one of the sliding sleeves (21). The hot melt mechanism (3) is fixedly connected to the side wall of the other sliding sleeve (21).

8. The large-diameter PE corrugated pipe hot-melt butt welding fixture according to claim 7, characterized in that, The top of the support frame (18) is symmetrically fixedly connected with limit rods (24), and one of the limit rods (24) away from the mounting frame (7) has a notch in its middle corresponding to the bar (22).

9. The large-diameter PE corrugated pipe hot-melt butt welding fixture according to claim 8, characterized in that, The mounting bracket (7) has a motor (25) fixedly connected to the side wall near the top, and a gear (26) fixedly connected to its output end. A rack (27) meshes with the top of the gear (26). The outer walls of the two sliding sleeves (21) are rotatably fitted with collars (28). Both ends of the rack (27) are fixedly connected to the side walls of the corresponding collars (28).

10. A construction method for a hot-melt butt welding fixture for large-diameter PE corrugated pipes, characterized in that, Based on the large-diameter PE corrugated pipe hot-melt butt welding fixture according to any one of claims 1-9, the construction method includes the following steps: S1: Start motor one (17), drive the positioning plate (6) to rotate 90 degrees and be perpendicular to the mounting bracket (7), place the corrugated pipes to be connected into the corresponding V-shaped brackets (4) so ​​that the ends of the corrugated pipes contact the corresponding positioning plates (6); S2: Start the electric push rod (8), which drives the connecting frame (9) and telescopic frame (10) to move down, driving the corresponding arc plate (5) to contact the side wall of the bellows. The pressure sensor (14) monitors the pressure value in real time. After reaching the preset threshold, the electric push rod (8) is controlled to stop running. Then the motor (17) is started to reverse, driving the positioning plate (6) to reset. S3: Start motor three (25), drive the corresponding sliding sleeve (21) to move through the meshing of gear (26) and rack (27), so that the grinding mechanism (2) moves to the middle of the rotating rod (19). At this time, the sliding groove (23) inside the sliding sleeve (21) corresponding to the grinding mechanism (2) engages with the bar (22), and the hot melt mechanism (3) and the corresponding sliding sleeve (21) move away from the bar (22). S4: Start motor two (20) to drive the rotating rod (19) to rotate. With the cooperation of the bar (22) and the slide (23), the grinding mechanism (2) rotates 180 degrees and is placed between the bellows at the ends that are close to each other. Start electric push rod two (16) to drive the corresponding V-shaped card seat (4) and the bellows fixed inside it to fit the grinding mechanism (2). Then start the grinding mechanism (2) to start grinding. S5: After grinding is completed, the electric push rod 2 (16) retracts a certain distance, the motor 2 (20) reverses, driving the grinding mechanism (2) to reset, and then the motor 3 (25) starts to reverse, causing the hot melt mechanism (3) to move to the middle of the rotating rod (19). At this time, the sliding groove (23) inside the sliding sleeve (21) corresponding to the hot melt mechanism (3) engages with the bar (22). Then the motor 2 (20) starts again, driving the hot melt mechanism (3) to rotate 180 degrees to start the hot melt operation. S6: After the hot melt is completed, motor 2 (20) reverses and drives the hot melt mechanism (3) to reset. Then, electric push rod 2 (16) is started, which drives the corresponding V-shaped bracket (4) and the corrugated pipe fixed inside it to fit with the end face of another corrugated pipe. After cooling, the positioning component is reset and the corrugated pipe after docking is taken out.

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