Hot melting welding and grinding integrated equipment for hollow wall plastic steel winding pipe joint

Abstract

The invention discloses hot melting welding and grinding integrated equipment for a hollow wall plastic steel winding pipe joint. The equipment comprises a rack, and a pipe supporting device, a joint hanging device, a high-temperature hot melting device and a grinding device which are arranged on the rack. A first movable plate and a second movable plate which can move are arranged on the machine frame, and the welding device and the grinding device are fixed to the two movable plates respectively. An abutting component is arranged on the second movable plate, when the first movable plate carries the welding device to move to the welding station, the second movable plate can be pushed through the abutting component, and the grinding device is driven to automatically leave the grinding station; and a reset mechanism is connected between the second movable plate and the rack, so that the second movable plate can automatically reset after welding is completed. Automatic and mutual exclusion switching of the welding station and the grinding station is achieved through pure mechanical linkage, the problems that in the prior art, procedures are separated, efficiency is low, and the automation degree is insufficient are solved, and the machining efficiency and the quality stability are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of pipeline processing machinery technology, specifically relating to an integrated hot melt welding and grinding equipment for hollow wall plastic steel spiral wound pipe joints. Background Technology

[0002] Hollow-wall spiral wound plastic pipes, widely used in drainage and sewage engineering, rely heavily on the reliability and sealing of their joints as key quality indicators. Currently, in the construction of this type of pipe, dedicated pipe end fittings are typically welded to both ends. The standard connection process mainly includes two core steps: First, the contact surfaces of the pipe ends and the pipe end fittings must be hot-melted at high temperature until they reach a molten state before butt-jointing and fusing to form a strong welded joint; second, after welding, the weld area must be ground to remove excess weld material and burrs, ensuring a smooth weld surface and thus guaranteeing the joint's mechanical strength and corrosion resistance. Therefore, hot-melt welding and weld grinding are two indispensable key technical steps connecting the preceding and following stages.

[0003] However, in current production practice, the two processes mentioned above are usually completed by separate, single-function equipment. That is, operators must first use a hot-melt butt welding machine to complete the welding, and then unload and transfer the workpiece to another grinding machine for secondary clamping and grinding. This separate operation mode has a series of significant drawbacks: First, the process switching efficiency is low; the repeated handling, positioning, and clamping of the workpiece between machines consumes a lot of time, severely restricting overall production efficiency. Second, the equipment integration and automation level are low, requiring two independent sets of equipment and corresponding operators, increasing equipment investment and labor costs. Third, the consistency of processing quality is difficult to guarantee; because it is difficult to achieve precise repeated positioning of the workpiece during the two clamping operations, the reference for the grinding process may deviate, affecting the final welding and grinding quality, and may even damage the workpiece due to positioning errors. Furthermore, although some technicians have attempted to simply combine welding and grinding functions into one machine, this often requires a complex electrical control system or additional drive devices to achieve station switching, leading to a sharp increase in equipment costs, high failure rates, and complex maintenance, thus preventing its widespread application.

[0004] Therefore, the present invention proposes an integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral wound pipe joints to at least partially solve the above-mentioned problems. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides an integrated hot-melt welding and grinding equipment for hollow-walled plastic-steel spiral wound pipe joints. This equipment solves the problems of poor process connection, low production efficiency, high equipment cost, and poor processing quality consistency caused by the separation of the two core processes of hot-melt welding and weld grinding in the prior art, which require independent equipment for step-by-step operation.

[0006] The objective of this invention can be achieved through the following technical solution: An integrated hot-melt welding and grinding device for hollow-walled plastic-steel spiral pipe joints, comprising a frame and a pipe support device, a joint suspension device, a high-temperature hot-melt device, and a grinding device mounted on the frame; the pipe support device is used to horizontally place the hollow-walled plastic-steel spiral pipe, the joint suspension device is used to suspend and drive the pipe end joint to move axially, the high-temperature hot-melt device is used to perform hot-melt welding on the pipe end joint and the pipe body end, and the grinding device is used to grind the weld seam; the frame is provided with a first movable plate movable along the pipe body axial direction and a second movable plate movable in a direction perpendicular to the pipe body axial direction; the joint suspension device and the high-temperature hot-melt device… The grinding device is fixedly mounted on the first movable plate; the grinding device is fixedly mounted on the second movable plate; the second movable plate is provided with an abutment member, which is located on the path of the first movable plate moving along the axial direction of the pipe towards the welding station, so that when the first movable plate carries the joint suspension device and the high-temperature hot melt device to the welding station, the abutment member pushes the second movable plate to move in the direction perpendicular to the axial direction of the pipe, thereby driving the grinding device away from the grinding station; a reset mechanism is connected between the second movable plate and the frame, and the reset mechanism provides a reset force that tends to return the second movable plate and the grinding device to the grinding station.

[0007] As a preferred embodiment of the present invention, the pipe support device includes a support wheel for driving the hollow wall plastic-steel spiral pipe to rotate, and the grinding device includes a grinding wheel, the rotation axis of the grinding wheel is parallel to the rotation axis of the support wheel, and the grinding wheel is configured such that when grinding is performed, its rotation direction is opposite to the direction in which the support wheel drives the pipe body to rotate.

[0008] As a preferred embodiment of the present invention, the connector suspension device includes a first mounting frame, a first driving component, and a suspension plate. The first driving component is a first linear driving mechanism. The fixing part of the first linear driving mechanism is fixed to the first mounting frame. The telescopic end of the first linear driving mechanism is connected to the suspension plate. The suspension plate is provided with a plurality of suspension screws arranged in a circular array for fixing the pipe end connector.

[0009] As a preferred embodiment of the present invention, the high-temperature hot-melt device includes a second mounting frame, a second driving component, and a heating plate. The second driving component is a second linear driving mechanism. The fixed part of the second linear driving mechanism is fixed to the second mounting frame. The telescopic end of the second linear driving mechanism is connected to the heating plate through a hanger. An operating handle is provided on the heating plate, and a control button for controlling the start and stop of the heating plate is integrated on the operating handle.

[0010] As a preferred embodiment of the present invention, the lifting device is a flexible lifting rope.

[0011] As a preferred embodiment of the present invention, it further includes an electromagnetic locking mechanism for locking the second movable plate when the grinding device is in the grinding position; the electromagnetic locking mechanism includes an electromagnet disposed on the frame and a magnetic adsorption member disposed on the second movable plate, which is driven by the electromagnet to generate mechanical displacement, the electromagnet being configured to drive the magnetic adsorption member to engage with the frame when energized to achieve locking.

[0012] As a preferred embodiment of the present invention, the magnetic adsorption component is an adsorption box with a retractable iron rod inside; a partition is fixedly installed on the frame, and an insertion hole is provided on the partition; the electromagnet is located on the side of the partition facing away from the adsorption box and is configured to attract the iron rod when energized, so that the iron rod extends and is inserted into the insertion hole.

[0013] As a preferred embodiment of the present invention, the electromagnet and the drive motor of the grinding device are electrically connected to the same control circuit to achieve synchronous power-on and power-off.

[0014] As a preferred embodiment of the present invention, the reset mechanism is a compression spring or a tension spring.

[0015] As a preferred embodiment of the present invention, the pipe support device is provided in at least two sets, and the first movable plate can be moved to the welding station corresponding to any of the pipe support devices.

[0016] The beneficial effects of this invention are as follows: By creatively utilizing the principle of pure mechanical linkage through the first and second movable plates, the abutment components, and the reset mechanism set on the frame, the automatic, mutually exclusive switching and precise reset of the hot melt welding device and the weld grinding device in the workspace are realized. This fundamentally solves the problems of low efficiency, insufficient automation, and poor repeatability caused by the separation of the two core processes in traditional processes. On this basis, the integrated electromagnetic locking mechanism (including an electromagnet, a telescopic iron rod, and a partition with a plug hole) can achieve rigid locking of the second movable plate during the grinding process, effectively eliminating the micro-vibration of the second movable plate caused by the grinding force during the grinding process, thereby significantly improving the grinding accuracy and quality stability. Combined with the coordinated design of the counter-rotating support wheel and the grinding wheel, the stability of the grinding process and the consistency of weld quality are greatly enhanced. At the same time, the overall structure is simple and reliable, effectively reducing manufacturing costs and maintenance complexity. The optional multi-group pipe support device, in conjunction with the movable first movable plate, further supports multi-station continuous operation mode, significantly improving equipment utilization and overall production efficiency. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of an integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral pipe joints according to the present invention.

[0019] Figure 2 This is a partial structural schematic diagram of an integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral pipe joints according to the present invention.

[0020] Figure 3 This is a schematic diagram of the joint suspension device and high-temperature hot-melt device of an integrated hot-melt welding and grinding equipment for hollow wall plastic-steel spiral pipe joints according to the present invention.

[0021] Figure 4 This is a schematic diagram of the grinding device of an integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral pipe joints according to the present invention.

[0022] Figure 5 This is a bottom view of the grinding device of an integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral pipe joints according to the present invention.

[0023] Figure 6 This is a cross-sectional structural schematic diagram of a magnetic adsorption component for a thermomelting and grinding integrated equipment for hollow wall plastic-steel spiral pipe joints according to the present invention.

[0024] Figure 7This is a schematic diagram of the pipe support device for a thermomelting and grinding integrated equipment for hollow wall plastic-steel spiral pipe joints according to the present invention.

[0025] In the diagram: 1. Frame; 2. Pipe support device; 21. Support wheel; 3. Joint suspension device; 31. First mounting bracket; 32. First linear drive mechanism; 33. Suspension plate; 34. Suspension screw; 4. High-temperature hot melt device; 41. Second mounting bracket; 42. Second linear drive mechanism; 43. Lifting device; 44. Heating plate; 45. Control handle; 5. Grinding device; 51. Grinding wheel; 6. First movable plate; 7. Second movable plate; 71. Abutment component; 72. Reset mechanism; 8. Magnetic adsorption component; 81. Iron rod; 91. Electromagnet; 92. Partition plate; 93. Insertion hole. Detailed Implementation

[0026] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0027] Please see Figures 1 to 7 This invention discloses an integrated hot-melt welding and grinding device for hollow-walled plastic-steel spiral wound pipe joints. The device comprises a basic frame (frame 1) and multiple functional modules mounted on the frame 1, mainly including: a pipe support device 2 for supporting and rotating the pipe body; a joint suspension device 3 for fixing and driving the pipe end joint; a high-temperature hot-melt device 4 for heating and melting the connection interface; and a grinding device 5 for finishing the weld. The core innovation of this invention lies in its ingenious mechanical linkage design, which integrates the welding and grinding processes into one, achieving automatic switching between workstations.

[0028] The equipment has two independently movable platforms on the frame 1: a first movable plate 6 and a second movable plate 7. The first movable plate 6 is mounted on a base that can slide radially along the pipe body and can also slide axially relative to the base along the pipe body. It integrates a joint suspension device 3 and a high-temperature hot-melt device 4 related to the welding process. The second movable plate 7 is movable radially in a direction perpendicular to the pipe body's axial direction, and a grinding device 5 for performing the grinding process is fixed on it.

[0029] The linkage between these two movable plates is one of the key aspects of this invention. The second movable plate 7 is equipped with an abutment member 71, preferably a roller or slider. On the side of the first movable plate 6, corresponding to the abutment member 71, there is a beveled structure (such as an angled bevel or a beveled protrusion). This beveled structure is precisely positioned on the path of the first movable plate 6 as it moves towards the welding station. When the operator pushes the first movable plate 6 into the welding station along the pipe's axial direction, the beveled structure on the first movable plate 6 contacts and presses against the abutment member 71. Due to the beveled surface, the axial movement of the first movable plate 6 is converted into a radial thrust on the second movable plate 7, thereby causing the second movable plate 7 and its grinding device 5 to move in a direction perpendicular to the pipe's axial direction, automatically avoiding the working area. This design ensures the spatial exclusivity of the welding and grinding functional modules, avoiding interference.

[0030] To achieve automatic return of the grinding station, a reset mechanism 72 is connected between the second movable plate 7 and the frame 1. In this embodiment, the reset mechanism 72 can be a compression spring or a tension spring. When the first movable plate 6 completes the welding task and moves away, the thrust applied to the abutment member 71 disappears, and the elastic potential energy stored in the reset mechanism 72 is released, driving the second movable plate 7 to automatically return to its initial position, thus accurately resetting the grinding device 5 to the grinding station and preparing it for subsequent grinding processes. This embodiment adopts a purely mechanical linkage and reset design, which is simple and reliable in structure, requires no complex electrical control system, and significantly improves the automation level and operational stability of the equipment.

[0031] The pipe support device 2 is used to horizontally place the hollow-walled plastic-steel spiral wound pipe to be processed. Its main components are several sets of support wheels 21. These support wheels 21 not only provide stable support but also have driving capabilities, allowing the pipe body to rotate uniformly around its own axis during the grinding process, thereby achieving uniform grinding of the entire annular weld. In a preferred embodiment of the invention, at least two sets of pipe support devices 2 can be arranged along the length of the frame 1, in conjunction with a first movable plate 6 that can move over a long stroke, enabling the equipment to process pipes at different positions simultaneously or to achieve continuous multi-station operation in an assembly line manner, thereby significantly improving production efficiency.

[0032] The first movable plate 6 integrates the joint suspension device 3 and the high-temperature hot melting device 4.

[0033] The joint suspension device 3 includes a first mounting frame 31, a first linear drive mechanism 32 as a driving component, and a suspension plate 33. In this embodiment, the first linear drive mechanism 32 is preferably a first hydraulic cylinder. The cylinder body of the first hydraulic cylinder is fixed on the first mounting frame 31, and its telescopic end is connected to the suspension plate 33. The suspension plate 33 is provided with a plurality of suspension screws 34 arranged in a circular array for convenient and secure fixing of the pipe end joint to be welded. During the welding process, by controlling the extension and retraction of the first hydraulic cylinder, the pipe end joint can be precisely driven to move axially to complete the heat fusion and butt joint with the end of the pipe body.

[0034] The high-temperature hot-melt device 4 is responsible for providing the heat required for welding. It includes a second mounting bracket 41, a second linear drive mechanism 42 as a drive component, and a heating plate 44. In this embodiment, the second linear drive mechanism 42 is preferably a second hydraulic cylinder. The cylinder body of the second hydraulic cylinder is fixed to the second mounting bracket 41, and its telescopic end is connected to the heating plate 44 via a lifting device 43. In this embodiment, the lifting device 43 is preferably a flexible lifting rope. This design allows the heating plate 44 to have a certain degree of posture self-adaptation when being lifted or lowered, enabling it to better conform to the end face of the pipe and the joint. The heating plate 44 is also ergonomically equipped with a control handle 45, which integrates a button for controlling the start and stop of the heating plate 44, facilitating fine manual adjustment and real-time control by the operator.

[0035] The grinding device 5 is fixed to the second movable plate 7, and its core component is the grinding wheel 51. To achieve the best grinding effect, the rotation axis of the grinding wheel 51 is designed to be parallel to the rotation axis of the support wheel 21 of the pipe support device 2. More importantly, during the grinding operation, the rotation direction of the grinding wheel 51 is set to be opposite to the rotation direction of the pipe body driven by the support wheel 21. This "reverse grinding" method can generate a greater relative linear velocity and a stronger cutting force, thereby efficiently removing weld excess and obtaining a smooth surface.

[0036] To ensure the stability and precision of the grinding process and prevent vibration or displacement of the second movable plate 7 due to grinding force, this invention also features an electromagnetic locking mechanism. This mechanism includes an electromagnet 91 mounted on the frame 1 and a magnetic adsorption element 8 mounted on the second movable plate 7. When the grinding device 5 is in the grinding position, this mechanism can rigidly lock the second movable plate 7.

[0037] Specifically, the magnetic adsorption component 8 is an adsorption box with a retractable iron rod 81 inside. A partition 92 is fixed at the corresponding position on the frame 1, and the partition 92 has a insertion hole 93. An electromagnet 91 is installed on the side of the partition 92 facing away from the adsorption box. To achieve automated control, the electromagnet 91 is electrically connected to the drive motor of the grinding device 5 in the same control circuit. When the grinding motor is started, the electromagnet 91 is synchronously energized, generating a strong magnetic force to attract the iron rod 81, causing it to extend beyond the force of the internal return spring and precisely insert into the insertion hole 93 of the partition 92, thereby firmly locking the second movable plate 7. After grinding is completed, the motor is de-energized, and the electromagnet 91 is also de-energized. The magnetic force disappears, and the iron rod 81 automatically retracts under the action of the internal spring, releasing the lock. This electromagnetic locking mechanism effectively eliminates vibration during the grinding process, ensuring grinding accuracy.

[0038] This invention provides an integrated hot-melt welding and grinding equipment for hollow-wall plastic-steel spiral wound pipe joints. The workflow is clear and efficient, and the specific steps are as follows: (1) Preparation stage: Place the hollow wall plastic steel spiral pipe to be processed on the pipe support device 2, and fix the matching pipe end joint on the suspension plate 33 of the joint suspension device 3 by the suspension screw 34.

[0039] (2) Welding stage: The operator pushes the first movable plate 6 along the axial direction of the pipe body to the welding station. During this process, the first movable plate 6 automatically pushes the second movable plate 7, which carries the grinding device 5, away from the work area through the abutment component 71. Subsequently, the high-temperature hot melt device 4 is started, and the heating plate 44 is lowered between the pipe end and the pipe end joint under the control of the second hydraulic cylinder for heating. After reaching the preset melting state, the heating plate 44 is raised, and the first hydraulic cylinder is immediately driven to align the molten pipe end joint with the pipe end and maintain pressure to form a strong weld.

[0040] (3) Grinding stage: After welding is completed, the first movable plate 6 is pulled back along the pipe body axis. At this time, the reset mechanism 72 automatically pulls the second movable plate 7 back to the grinding position, so that the grinding wheel 51 of the grinding device 5 is aligned with the weld. The grinding program is started, and the drive motor of the grinding device 5 and the electromagnet 91 of the electromagnetic locking mechanism are energized synchronously, and the second movable plate 7 is locked instantly. At the same time, the support wheel 21 of the pipe support device 2 starts to drive the pipe body to rotate. The rotation direction of the grinding wheel 51 is opposite to the direction in which the support wheel 21 drives the pipe body to rotate, so as to perform uniform and stable grinding on the entire annular weld.

[0041] (4) Completion: After grinding, turn off the equipment and the electromagnetic locking mechanism will unlock automatically. Remove the processed pipe and proceed to the next round of work.

[0042] Through the above design, this invention achieves significant beneficial effects: First, by setting up the first movable plate 6 and the second movable plate 7, along with the abutment component 71 and the reset mechanism 72 between them, it creatively utilizes the principle of pure mechanical linkage to realize automatic, mutually exclusive switching and precise reset of the hot-melt welding and weld grinding stations. This largely solves the problems of low efficiency, insufficient automation, and poor repeatability caused by the separation of the two core processes in traditional processes. Second, the integrated electromagnetic locking mechanism can achieve rigid locking of the second movable plate 7 during the grinding process. Combined with the coordinated design of the counter-rotating support wheel 21 and the grinding wheel 51, it greatly enhances the stability of the grinding process and the consistency of weld quality. Finally, the overall architecture is simple and reliable, effectively reducing manufacturing costs and maintenance complexity. The optional multi-group pipe support device 2, in conjunction with the movable first movable plate 6, further supports multi-station continuous operation mode, significantly improving equipment utilization and overall production efficiency.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An integrated hot-melt welding and grinding equipment for hollow-walled plastic-steel spiral wound pipe joints, comprising a frame and a pipe support device, a joint suspension device, a high-temperature hot-melt device, and a grinding device mounted on the frame; the pipe support device is used to horizontally place the hollow-walled plastic-steel spiral wound pipe, the joint suspension device is used to suspend and drive the pipe end joint to move axially, the high-temperature hot-melt device is used to perform hot-melt welding between the pipe end joint and the pipe body end, and the grinding device is used to grind the weld seam; characterized in that... The frame is provided with a first movable plate movable along the axial direction of the pipe and a second movable plate movable in a direction perpendicular to the axial direction of the pipe. The joint suspension device and the high-temperature hot-melt device are fixedly mounted on the first movable plate. The grinding device is fixedly mounted on the second movable plate. The second movable plate is provided with an abutting member located on the path of the first movable plate moving along the axial direction of the pipe towards the welding station. When the first movable plate carries the joint suspension device and the high-temperature hot-melt device towards the welding station, the abutting member pushes the second movable plate to move in the direction perpendicular to the axial direction of the pipe, thereby driving the grinding device away from the grinding station. A reset mechanism is connected between the second movable plate and the frame. The reset mechanism provides a reset force that tends to return the second movable plate and the grinding device to the grinding station.

2. The integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral wound pipe joints according to claim 1, characterized in that, The pipe support device includes a support wheel for driving the hollow wall plastic-steel spiral pipe to rotate, and the grinding device includes a grinding wheel with its rotation axis parallel to that of the support wheel. The grinding wheel is configured such that when grinding is performed, its rotation direction is opposite to the direction in which the support wheel drives the pipe to rotate.

3. The integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral wound pipe joints according to claim 1, characterized in that, The connector suspension device includes a first mounting frame, a first driving component, and a suspension plate. The first driving component is a first linear drive mechanism. The fixed part of the first linear drive mechanism is fixed to the first mounting frame. The telescopic end of the first linear drive mechanism is connected to the suspension plate. The suspension plate is provided with a plurality of suspension screws arranged in a circular array for fixing the pipe end connector.

4. The integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral wound pipe joints according to claim 1, characterized in that, The high-temperature hot-melt device includes a second mounting frame, a second driving component, and a heating plate. The second driving component is a second linear drive mechanism. The fixed part of the second linear drive mechanism is fixed to the second mounting frame. The telescopic end of the second linear drive mechanism is connected to the heating plate through a hanger. An operating handle is provided on the heating plate, and a control button for controlling the start and stop of the heating plate is integrated on the operating handle.

5. The integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral wound pipe joints according to claim 4, characterized in that, The lifting device is a flexible lifting rope.

6. The integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral wound pipe joints according to claim 1, characterized in that, It also includes an electromagnetic locking mechanism for locking the second movable plate when the grinding device is in the grinding position; the electromagnetic locking mechanism includes an electromagnet disposed on the frame and a magnetic adsorption component disposed on the second movable plate that can generate mechanical displacement by being driven by the electromagnet, the electromagnet being configured to drive the magnetic adsorption component to engage with the frame to achieve locking when energized.

7. The integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral wound pipe joints according to claim 6, characterized in that, The magnetic adsorption component is an adsorption box with a retractable iron rod inside; a partition is fixedly installed on the frame, and a plug-in hole is opened on the partition; the electromagnet is located on the side of the partition facing away from the adsorption box, and is configured to attract the iron rod when energized, so that the iron rod extends and is inserted into the plug-in hole.

8. The integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral wound pipe joints according to claim 7, characterized in that, The electromagnet and the drive motor of the grinding device are electrically connected to the same control circuit to achieve synchronous power-on and power-off.

9. The integrated hot-melt welding and grinding equipment for hollow-wall plastic-steel spiral wound pipe joints according to claim 1, characterized in that, The reset mechanism is a compression spring or a tension spring.

10. The integrated hot melt welding and grinding equipment for hollow wall plastic-steel spiral wound pipe joints according to claim 1, characterized in that, The pipe support device is provided in at least two sets, and the first movable plate can be moved to the welding station corresponding to any of the pipe support devices.

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