Drainage PE pipe hot melt connecting device and connecting method

Abstract

This invention provides a hot-melt connection device and method for drainage PE pipes, relating to the field of pipe welding technology. It includes a base frame; a pair of side frames, rotatably mounted vertically on both sides of the base frame; a rotating frame horizontally hinged to the side frames; fixing members mounted on the rotating frames on both sides, each used to clamp and fix the corresponding side of the pipe to be connected; a first driving member mounted on the base frame, used to synchronously drive the pair of side frames to rotate in opposite directions; and a second driving member mounted on the side frames, used to drive the rotating frame to swing up and down around its hinge axis and lock its position after swinging. This invention enables controlled bending of large-diameter PE pipes within limited working spaces such as trenches, allowing for smooth pipe end connection and ensuring the safety of the bending process and the stability of the connection posture.

Description

Technical Field

[0001] This invention relates to the field of pipe welding technology, and more specifically, to a hot-melt connection device and method for drainage PE pipes. Background Technology

[0002] Polyethylene (PE) drainage pipes are widely used in municipal drainage projects and related underground pipeline construction due to their advantages such as corrosion resistance, light weight, and ease of construction. When cracks or breaks occur in the pipes during construction, use, or in the event of an accident, it is usually necessary to cut off the damaged section and then repair it by heat fusion. The existing repair process generally includes: first, cutting off a relatively long section of pipe on both sides of the damaged area to ensure that the damaged part is completely removed and a neat end face is obtained; then preparing a new pipe section of the same length as the cut section and completing the connection using two heat fusion joints.

[0003] In traditional methods, workers typically first heat-weld a joint onto the new pipe section to replace it, and then weld this joint to the end of the pipe to be connected. Next, a second joint is welded to the other end of the original pipe, allowing the new pipe section to be inserted into the corresponding joint, ultimately aligning the two pipe sections. However, because the new pipe section needs to be inserted into the joint, simply aligning and pushing it horizontally often cannot fully insert the pipe end. The pipe needs to be bent at a certain angle to release some of the excess material, allowing for proper insertion and subsequent heat-welding.

[0004] However, in actual municipal drainage construction sites, the length of the excavated trenches is often limited by roads, surface structures, and underground pipelines, resulting in generally limited working space. Furthermore, drainage PE pipes typically have large diameters and relatively rigid walls, making them difficult for workers to bend effectively manually. Using conventional tools such as pry bars and wrenches not only fails to generate sufficient bending torque but may also cause pipe wall indentations, surface damage, or create new hazards, leading to low repair efficiency and the risk of secondary damage. Summary of the Invention

[0005] The purpose of this invention is to provide a heat fusion connection device and method for drainage PE pipes, which can perform controllable bending of large-diameter PE pipes in limited working spaces such as trenches, so that the pipe ends can be successfully connected, and ensure the safety of the bending process and the stability of the connection posture.

[0006] Firstly, the present invention is achieved through the following technical solution:

[0007] A heat fusion connection device for drainage PE pipes, comprising:

[0008] Base frame;

[0009] Side frames, which are a pair, are rotatably mounted vertically on both sides of the base frame;

[0010] A rotating frame, which is horizontally hinged to the side frame;

[0011] The fixing components are provided on the rotating frames on both sides, and the fixing components on both sides are used to clamp and fix the corresponding pipes to be connected.

[0012] A first driving member is disposed on the base frame and is used to synchronously drive a pair of side frames to rotate in opposite directions;

[0013] The second driving member is disposed on the side frame and is used to drive the rotating frame to swing up and down around its hinge axis and lock its position after swinging.

[0014] Furthermore, the rotating frame includes a guide portion, the fixing member is slidably mounted on the guide portion, and the guide portion has a limiting structure for fixing the position of the fixing member after it slides along the guide portion;

[0015] And / or, the parts of the side frames that rotate on the base frame are located at the edges of the side frames that are far apart from each other, and the parts of the rotating frames that rotate on the side frames are also located at the edges of the side frames that are far apart from each other.

[0016] Furthermore, at least one pair of the fixing members are provided along the guiding direction of the guide portion;

[0017] And / or, the guide portion includes any structure selected from guide rod, guide groove, slide rail, or any combination thereof;

[0018] And / or, the fastener includes a pipe clamp;

[0019] And / or, the limiting structure includes a locking bolt.

[0020] Furthermore, the rotating frame includes a rotating plate and support plates fixed to both sides of the top wall of the rotating plate. The top of the support plate is provided with a support arc groove for supporting the outer wall of the pipe, and the support arc groove is flush with the inner wall of the pipe clamp.

[0021] Furthermore, the first driving component includes a pair of rotating wheels, a tire, and a first driving motor. The pair of rotating wheels are respectively fixedly connected to the side frame in the vertical direction by a shaft. The tire is wound around the pair of rotating wheels. The first driving motor is disposed on the base frame and connected to one of the rotating wheels.

[0022] Furthermore, the second driving component includes a second driving cylinder, which is fixedly connected vertically to the side frame. The piston rod of the second driving cylinder is connected to the rotating frame and drives the rotating frame to rotate. An arc-shaped guide groove is provided at the top of the base frame, and the cylinder body of the second driving cylinder is slidably connected in the guide groove.

[0023] Furthermore, a fixed rod is fixedly installed on the rotating frame, and a sliding sleeve is slidably sleeved on the fixed rod. The piston rod of the second driving cylinder is hinged to the sliding sleeve.

[0024] Furthermore, the four corners of the base frame are provided with adjustment components for adjusting the height;

[0025] And / or, the base frame is provided with lifting lugs.

[0026] Furthermore, each of the adjustment components includes a sleeve, a slide rod, and an adjustment screw. The sleeve is fixedly mounted on the base frame, the slide rod is slidably inserted into the sleeve, and the adjustment screw is arranged along the length of the sleeve and threadedly connected to the slide rod.

[0027] Secondly, the present invention is achieved through the following technical solution:

[0028] A method for hot-melt connection of drainage PE pipes, using the hot-melt connection device for drainage PE pipes described in the above scheme, includes the following steps:

[0029] S1, hoist the drainage PE pipe hot-melt connection device into the trench and move it to the position directly below the pipe after a longer section of pipe has been cut off;

[0030] S2, clamp and fix the corresponding pipes to be connected by the fixing members on both sides respectively, and keep the protruding section at the end of each pipe that can be used for hot melting. Then, drive the pipes on both sides to rotate in opposite directions by the first driving member so that each pipe end has an installation distance.

[0031] S3, heat-melt weld the first joint at one end of the new pipe section to the corresponding end of the original pipe; then weld the second joint to the end of the original pipe on the other side.

[0032] S4, drive the first drive component to rotate and reset the pipes on both sides, and at the same time drive the rotating frame through the second drive component to bend the pipe upward so that the other end of the new pipe section being replaced is in the same vertical plane as the second joint.

[0033] S5, after completing the heat fusion of the second joint and the new pipe section, continues to drive the pipe downward through the second driving component, so that the axis of the new pipe section is automatically aligned with the axis of the original pipe and finally the plug-in installation is achieved.

[0034] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0035] 1. This invention utilizes a pair of vertically rotatable side frames on both sides of a base frame. A first driving component synchronously drives these side frames to rotate in opposite directions, causing the ends of the pipes to be connected to deflect vertically towards both sides of the trench. This effectively expands the operating space between the pipe ends within the limited trench space. Compared to existing technologies that use an overall upward tilting of the pipe to release connection allowance, this invention avoids the problems of requiring a large upward tilting angle and significant vertical space when installing new pipe sections, the first joint, and the second joint due to their large pipe diameter. This significantly reduces the bending stress applied to the pipe and minimizes the risk of bending deformation or structural damage to the pipe ends. Furthermore, by rotating to both sides, a smaller rotation angle is required to obtain a larger installation and welding space, facilitating the sequential installation and hot-melt welding of the first joint, the second joint, and the new pipe section, thus improving the operability and safety of on-site construction.

[0036] 2. After completing the heat fusion installation of the first joint, the second joint, and the new pipe section, and pre-heat fusion of the end of the second joint corresponding to the new pipe section, the pipes on both sides are rotated and reset by driving the first driving component. Simultaneously, the second driving component drives the rotating frame to bend the pipe upwards, so that the other end of the replacement pipe section is on the same vertical plane as the second joint, thus achieving smooth alignment. Then, the second driving component drives the pipe downwards, so that the new pipe section is precisely aligned with the axis of the original pipe and the final welding is completed. Through the above-mentioned phased and controlled rotation and bending process, the pipe connection is changed from "forced alignment" to "direct alignment after posture adjustment," which not only improves the connection accuracy and welding quality, but also effectively reduces the construction difficulty. It is particularly suitable for the rapid and safe repair of large-diameter drainage PE pipes in confined spaces. Attached Figure Description

[0037] Figure 1 A schematic diagram of the overall structure of a drainage PE pipe hot-melt connection device provided by the present invention;

[0038] Figure 2 This is a schematic diagram illustrating the structure of the first driving component.

[0039] Figure 3 This invention aims to illustrate the state of the two side frames rotating in opposite directions and installing a new pipe section;

[0040] Figure 4 This invention aims to illustrate the state of the side frames rotating and resetting, and the rotating frame gradually tilting upwards to achieve pipe connection;

[0041] Figure 5 This invention aims to illustrate the upward tilting state of the rotating frame;

[0042] Figure 6 This invention aims to illustrate the state of the new pipe section, the first joint, and the second joint after installation.

[0043] Reference numerals: 100-Base frame, 110-Guide groove, 120-Lifting lug, 200-Side frame, 300-Rotating frame, 310-Guide part, 311-Limiting structure, 3111-Locking bolt, 312-Guide rod, 320-Rotating plate, 330-Support plate, 331-Support arc groove, 340-Fixing rod, 350-Sliding sleeve, 400-Fixing component, 410-Pipe clamp, 500-First driving component, 510-Rotating wheel, 520-Wheel belt, 521-Shaft, 530-First drive motor, 600-Second driving component, 610-Second drive cylinder, 700-Adjusting assembly, 710-Sleeve, 720-Sliding rod, 730-Adjusting screw, 800-New pipe section, 810-First joint, 820-Second joint, 900-Groove. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0046] The following is for reference Figures 1-6 As shown in the illustration, and further explained with reference to a specific embodiment, this embodiment provides a hot-melt connection device for drainage PE pipes, including a base frame 100. The base frame 100 is a rectangular plate structure, used to provide a stable installation foundation and load-bearing support for the entire connection device. Of course, in other embodiments, the base frame 100 can also be set in the form of a frame structure, such as a frame-like structure formed by welding multiple steel sections or pipes. While ensuring overall strength and rigidity, this effectively reduces the self-weight of the device, facilitates hoisting and movement within the trench 900, and is especially suitable for municipal drainage projects where on-site construction conditions are limited.

[0047] The side frames 200 are a pair, and both side frames 200 are frame structures. They are rotatably mounted vertically on both sides of the base frame 100, allowing the side frames 200 to rotate relative to the base frame 100, thereby causing the clamped pipe to change its posture. The rotating frame 300 is horizontally hinged to the side frames 200, allowing the rotating frame 300 to swing up and down relative to the side frames 200 around a horizontal axis, providing a structural basis for subsequent upward and downward bending of the pipe.

[0048] The fixing members 400 are installed on the rotating frames 300 on both sides, and the fixing members 400 on both sides are used to clamp and fix the corresponding pipes to be connected, so as to achieve reliable positioning and synchronous force control of the two original pipes. At least one pair of fixing members 400 are provided along the guiding direction of the guide part 310, so that the fixing members 400 can be adjusted in position according to different construction spacing, thereby better adapting to drainage PE pipes.

[0049] In this embodiment, the fixing member 400 includes a pipe clamp 410 structure, which can form a ring-shaped clamp on the outer wall of the pipe, with uniform force distribution and less likelihood of causing localized damage to the outer wall of the pipe. Of course, in other embodiments, the fixing member 400 can also be a semi-circular clamp, an adjustable clamp, or a clamping structure with padding, as long as it can achieve stable fixing of the pipe.

[0050] Reference Figure 1 , Figure 5 As shown, the rotating frame 300 includes a guide portion 310, and a fixing member 400 is slidably mounted on the guide portion 310, allowing the fixing member 400 to be adjusted in position along the direction of the guide portion 310. A limiting structure 311 is provided on the guide portion 310, which locks the fixing member 400 after it has slid along the guide portion 310 to a predetermined position, preventing displacement during pipe rotation or bending. In this embodiment, the limiting structure 311 is a locking bolt 3111. The locking bolt 3111 abuts or presses against the guide portion 310 to reliably lock the position of the fixing member 400. The structure is simple, easy to operate, and suitable for rapid on-site adjustment.

[0051] The rotating frame 300 includes a rotating plate 320 and support plates 330 welded or bolted to both sides of the top wall of the rotating plate 320. The support plates 330 are used to provide auxiliary support and stress distribution for the pipeline. The top of the support plate 330 has a support groove 331 for supporting the outer wall of the pipeline. The curvature of the support groove 331 matches the outer wall of the pipeline, enabling surface contact support and preventing localized pressure damage from point contact. The support groove 331 is flush with the inner wall of the pipe clamp 410, making the overall stress on the pipeline more even after clamping, thus improving the stability of the pipeline during bending and rotation.

[0052] As an optional embodiment, the guide portion 310 may include any structure or any combination thereof, such as guide rods 312, guide grooves, and slide rails, to adapt to different manufacturing processes and usage requirements. In this embodiment, the guide rods 312 are configured as a pair and laterally fixed to the support plates 330 on both sides, forming a double guide rod 312 guide structure, which makes it less likely for the fixing member 400 to deviate during sliding and can provide a stable and reliable guiding support.

[0053] The pipe clamp 410 is slidably installed on the guide rod 312. The locking bolt 3111 passes through the pipe clamp 410 and abuts against the guide rod 312. By tightening the locking bolt 3111, the relative movement of the pipe clamp 410 on the guide rod 312 can be restricted, so as to realize the quick fixing and release of the position of the pipe clamp 410, which is convenient for construction personnel to make flexible adjustments according to the actual docking requirements.

[0054] Reference Figure 2 As shown, the first driving component 500 is mounted on the base frame 100 and is used to synchronously drive a pair of side frames 200 to rotate in opposite directions, so that the ends of the pipes clamped on both sides can be deflected vertically in opposite directions. The first driving component 500 includes a pair of rotating wheels 510, a tire 520, and a first driving motor 530. The pair of rotating wheels 510 are respectively fixedly connected to the two side frames 200 vertically by a shaft 521. The shaft 521 is fixedly connected to the side frame 200 vertically. The tire 520 is wound around the outside of the pair of rotating wheels 510. The first driving motor 530 is fixedly mounted on the base frame 100 and is connected to one of the rotating wheels 510 for transmission, thereby realizing the synchronous and opposite rotation of the two side frames 200. In this embodiment, the rotating wheels 510 and the tire 520 adopt a sprocket and chain structure, which has the advantages of reliable transmission and strong anti-pollution ability.

[0055] Of course, in other embodiments, the first driving member 500 may also adopt a synchronous belt mechanism, a gear transmission mechanism, or have motors installed on the two side frames 200 respectively for synchronous control, as long as the reverse linkage of the two side frames 200 can be achieved.

[0056] Reference Figure 1 , Figure 5 as well as Figure 6As shown, the second driving component 600 is mounted on the side frame 200 and is used to drive the rotating frame 300 to swing up and down around its hinge axis, and to lock the position after swinging to the target position. Specifically, the second driving component 600 includes a second driving cylinder 610, which is vertically fixedly connected to the side frame 200. Its piston rod is connected to the rotating frame 300, and under the extension and retraction of the cylinder, it drives the rotating frame 300 to rotate up or down around the hinge axis. The top of the base frame 100 is provided with an arc-shaped guide groove 110. The cylinder body of the second driving cylinder 610 is slidably connected in the guide groove 110, so that the second driving cylinder 610 can adjust its position along a predetermined trajectory during the driving process, avoiding interference caused by restricted rotation. The guide groove 110 can be made of, for example, Figure 1 The guide rail shown can also adopt an arc-shaped slot structure formed on the top of the base frame 100.

[0057] The guide groove 110 is arranged in an arc shape with the shaft 521 as the center. One end of the guide groove is located in the vertical plane where the shaft 521 of the side frame 200 is located, and the other end extends in a direction away from the vertical plane to form an arc segment. This effectively restricts the movement trajectory of the second drive cylinder 610, making the rotating frame 300 smoother and more controllable during the upward and downward rotation.

[0058] It is important to emphasize that this connecting device is particularly suitable for construction environments where the trench 900 is shallow, vertical working space is limited, and the rotating frame 300 has insufficient space for rotation, such as emergency repairs or partial excavation of drainage pipes under municipal roads. In actual use, the connecting device can be advanced from the side of the excavated trench 900 to the location of the pipe to be repaired without reserving a large operating space directly above the pipe or performing secondary excavation.

[0059] By first driving the two side frames 200 with the first driving component 500, the ends of the pipes to be connected on both sides rotate vertically and in opposite directions to both sides of the trench 900, thus creating sufficient lateral installation space between the pipes. Then, the first joint 810, the second joint 820, and the new pipe section 800 are installed and heat-fused in sequence, allowing the entire connection process to be completed smoothly within the limited vertical space. This operation method effectively avoids the problems of insufficient overhead space in traditional construction, which prevents the welding head from entering and restricts the operating posture.

[0060] Of course, it should be further explained that if the pipe to be connected is rotated upwards in the traditional way, the pipe joint will be tilted upwards. In this case, when the construction personnel use the welding head for hot melt welding, they must manually adjust the posture of the welding head to ensure coaxiality as much as possible. This is not only difficult to operate, but also easy to cause fatigue due to the heavy weight of the welding head. If the joint is corrected by visual inspection alone, it is very easy to cause axial misalignment or uneven weld, which will affect the welding quality and safety of later use.

[0061] This invention rotates the pipes to be joined towards both sides of the trench 90°, allowing the pipe joints to be in a basically horizontal state during welding. Under the influence of gravity, the weld joint more easily maintains a stable posture and naturally aligns with the pipe axis, thus achieving more stable and accurate coaxial welding. This method not only reduces the workload of construction workers but also significantly improves welding consistency and connection reliability, effectively reducing welding defects and the risk of rework.

[0062] As an optional embodiment, the portions of the two side frames 200 that rotate around the base frame 100 are located at the edges of the two side frames 200 that are far apart from each other, and the portions of the two rotating frames 300 that rotate around the side frames 200 are also located at the edges of the two side frames 200 that are far apart from each other. With this structural arrangement, a larger pipe offset can be obtained at the same rotation angle, thereby further improving the bending adjustment range of the pipe and providing more ample operating space for installing the new pipe section 800 and the first connector 810 and the second connector 820.

[0063] To enable the rotating frame 300 to rotate up and down, a fixed rod 340 is welded to the middle of the end of the rotating frame 300 away from its hinge. A sliding sleeve 350 is slidably fitted onto the fixed rod 340. The piston rod of the second drive cylinder 610 is hinged to the sliding sleeve 350. During the process of the second drive cylinder 610 driving the rotating frame 300 to rotate up or down, the sliding sleeve 350 can slide along the direction of the fixed rod 340, thereby compensating for relative displacement during the movement, preventing the mechanism from jamming, and improving the smoothness and reliability of the overall movement.

[0064] Reference Figure 5As shown, each of the four corners of the base frame 100 is equipped with an adjustment assembly 700 for height adjustment to adapt to complex construction conditions such as unevenness, local collapse, or slope changes at the bottom of the trench 900. Each adjustment assembly 700 includes a sleeve 710, a sliding rod 720, and an adjusting screw 730. The sleeve 710 is fixedly welded to the base frame 100. The sliding rod 720 is inserted into the sleeve 710 in a way that allows it to slide up and down. The adjusting screw 730 is arranged along the length of the sleeve 710 and threadedly connected to the sliding rod 720. By rotating the adjusting screw 730, the sliding rod 720 can be moved vertically to extend or retract, thereby achieving precise adjustment of the height and overall level of the base frame 100. This ensures that the pipeline remains in a stable and controllable posture during clamping, rotation, and hot-melt welding, and avoids adverse effects on the welding coaxiality caused by the tilt of the base frame 100.

[0065] Of course, in other alternative embodiments, the adjustment component 700 can also adopt an automated adjustment structure. For example, the adjustment screw 730 can be replaced with a vertically arranged adjustment cylinder or hydraulic cylinder, which can achieve rapid and automatic adjustment of the height of the base frame 100 through pneumatic or hydraulic drive. This is especially suitable for working conditions that require frequent adjustments to the device height or have high construction efficiency requirements. At the same time, rollers or casters can also be installed at the bottom of the base frame 100. When not fixed, this facilitates short-distance movement and precise positioning of the entire device within or at the edge of the trench 900. After the device is in place, it is locked by the locking mechanism of the rollers to ensure overall stability during construction.

[0066] Furthermore, to enhance the device's anti-overturning capability and overall stability during operation, a rod structure can be installed at the bottom of the base frame 100. This rod can be inserted into the soil or cushion layer at the bottom of the trench 900, providing vertical and lateral restraint to the base frame 100. Alternatively, in other embodiments, a top rod can be installed on the base frame 100, extending and abutting against the sidewall of the trench 900, thereby limiting the displacement and swaying of the base frame 100 under stress through lateral support. These various stabilization methods can be used individually or in combination depending on the construction environment to adapt to different geological conditions and trench 900 forms.

[0067] As an optional embodiment, lifting lugs 120 can also be installed on the base frame 100. The lifting lugs 120 are used to connect with lifting equipment to hoist the entire connecting device into or out of the trench 900. In specific implementations, the lifting lugs 120 can be configured as one pair, three pairs, or more, and arranged at intervals along the length or width of the base frame 100 to adapt to different hoisting methods and force requirements. By installing multiple lifting lugs 120, the force on the device can be more evenly distributed during hoisting, reducing the risk of tilting or swaying, thereby further improving construction safety, hoisting stability, and overall work efficiency.

[0068] In addition, the present invention also provides a method for hot-melt connection of drainage PE pipes, which, by employing the hot-melt connection device for drainage PE pipes in the above embodiments, includes the following steps:

[0069] S1, hoist the drainage PE pipe hot-melt connection device into the trench 900 and move it to the position directly below the pipe after a longer section of pipe has been cut off;

[0070] S2, clamp and fix the corresponding pipes to be connected by the two fixing members 400 respectively, and keep the protruding section at the end of each pipe that can be used for hot melting. Then, drive the two pipes to rotate in opposite directions by the first driving member 500 so that each pipe end has an installation distance.

[0071] S3, heat-melt weld the first joint 810 at one end of the new pipe section 800, and weld the first joint 810 to the end of the original pipe on the corresponding side; then weld the second joint 820 to the end of the original pipe on the other side.

[0072] S4, drive the first driving component 500 to rotate and reset the pipes on both sides, and at the same time drive the rotating frame 300 through the second driving component 600 to bend the pipe upwards, so that the other end of the new pipe section 800 and the second connector 820 are located in the same vertical plane.

[0073] S5, after the second connector 820 and the new pipe section 800 are heat-fused, the pipe continues to bend downward through the second driving component 600, so that the axis of the new pipe section 800 is automatically aligned with the axis of the original pipe and finally the plug-in installation is achieved.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A heat fusion connection device for drainage PE pipes, characterized in that, include: Base frame (100); Side frames (200), the side frames (200) are a pair, respectively rotatably arranged on both sides of the base frame (100) in a vertical direction; A rotating frame (300) is horizontally hinged to the side frame (200); Fixing members (400) are provided on the rotating frames (300) on both sides, and the fixing members (400) on both sides are used to clamp and fix the pipes to be connected on the corresponding sides; A first driving member (500) is disposed on the base frame (100) and is used to synchronously drive a pair of side frames (200) to rotate in opposite directions; The second driving member (600) is disposed on the side frame (200) and is used to drive the rotating frame (300) to swing up and down around its hinge axis and lock its position after swinging; wherein: The first driving member (500) includes a pair of rotating wheels (510), a tire (520), and a first driving motor (530). The pair of rotating wheels (510) are respectively fixedly connected to the side frame (200) in the vertical direction by a shaft (521). The tire (520) is wound around the pair of rotating wheels (510). The first driving motor (530) is disposed on the base frame (100) and connected to one of the rotating wheels (510). The second driving component (600) includes a second driving cylinder (610), which is fixedly connected to the side frame (200) in a vertical direction. The piston rod of the second driving cylinder (610) is connected to the rotating frame (300) and drives the rotating frame (300) to rotate. The top of the base frame (100) is provided with an arc-shaped guide groove (110), and the cylinder body of the second driving cylinder (610) is slidably connected in the guide groove (110).

2. The drainage PE pipe hot-melt connection device according to claim 1, characterized in that, The rotating frame (300) includes a guide portion (310), and the fixing member (400) is slidably mounted on the guide portion (310). The guide portion (310) has a limiting structure (311), which is used to fix the position of the fixing member (400) after it slides along the guide portion (310). And / or, the parts of the side frames (200) on both sides that rotate on the base frame (100) are located at the edges of the side frames (200) that are far apart from each other, and the parts of the rotating frames (300) on both sides that rotate on the side frames (200) are also located at the edges of the side frames (200) that are far apart from each other.

3. The drainage PE pipe hot-melt connection device according to claim 2, characterized in that, At least one pair of the fasteners (400) are provided along the guiding direction of the guide portion (310); And / or, the guide portion (310) includes any structure of the guide rod (312), guide groove, slide rail, or any combination thereof; And / or, the fastener (400) includes a clamp (410); And / or, the limiting structure (311) includes a locking bolt (3111).

4. The drainage PE pipe hot-melt connection device according to claim 3, characterized in that, The rotating frame (300) includes a rotating plate (320) and support plates (330) fixed to both sides of the top wall of the rotating plate (320). The top of the support plate (330) is provided with a support arc groove (331) to support the outer wall of the pipe. The support arc groove (331) is flush with the inner wall of the pipe clamp (410).

5. The drainage PE pipe hot-melt connection device according to claim 1, characterized in that, A fixed rod (340) is fixedly installed on the rotating frame (300), and a sliding sleeve (350) is slidably sleeved on the fixed rod (340). The piston rod of the second driving cylinder (610) is hinged to the sliding sleeve (350).

6. The drainage PE pipe hot-melt connection device according to claim 1, characterized in that, The four corners of the base frame (100) are provided with adjustment components (700) for adjusting the height; And / or, the base frame (100) is provided with lifting lugs (120).

7. The drainage PE pipe hot-melt connection device according to claim 6, characterized in that, Each adjustment assembly (700) includes a sleeve (710), a slide rod (720), and an adjustment screw (730). The sleeve (710) is fixedly mounted on the base frame (100). The slide rod (720) is slidably inserted into the sleeve (710). The adjustment screw (730) is arranged along the length of the sleeve (710) and threadedly connected to the slide rod (720).

8. A method for hot-melt connection of drainage PE pipes, using the hot-melt connection device for drainage PE pipes as described in any one of claims 1-7, characterized in that, Includes the following steps: S1, hoist the drainage PE pipe hot melt connection device into the trench (900) and move it to the position directly below the pipe after a long section of pipe has been cut off; S2, clamp and fix the corresponding pipes to be connected by the fixing members (400) on both sides respectively, and keep the protruding section at the end of each pipe for hot melting. Then, drive the pipes on both sides to rotate in opposite directions by the first driving member (500) so that each pipe end has an installation distance. S3, heat-melt weld the first joint (810) at one end of the new pipe section (800) and weld the first joint (810) to the end of the original pipe on the corresponding side; then weld the second joint (820) to the end of the original pipe on the other side; S4, drive the first drive unit (500) to rotate and reset the pipes on both sides, and at the same time drive the rotating frame (300) through the second drive unit (600) to bend the pipe upwards, so that the other end of the new pipe section (800) and the second joint (820) are located in the same vertical plane; S5, after the second joint (820) and the new pipe section (800) are heat-fused, the pipe is driven to bend downward by the second driving component (600) so that the axis of the new pipe section (800) is automatically aligned with the axis of the original pipe and finally plug-in installation is achieved.

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