A municipal road drainage pipe installation device and an installation method thereof

Abstract

This disclosure pertains to the field of pipeline laying and discloses an installation device and method for municipal road drainage pipes. The device includes a base plate with a pair of coaxially placed turntables on the base plate. The central axis of the turntables is parallel to the base plate. Multiple slide rails, evenly distributed in a ring around the central axis of each turntable, are fixed on the opposite side of the turntables. Each turntable has a corresponding diameter line coaxially placed with the central axis of the corresponding slide rail. Each slide rail has a sliding block with a fixed hot-melt rod. Through the cooperation of the turntables, a first threaded rod, a connecting plate, a connecting rod, a connecting plate, slide rails, slide blocks, and hot-melt rods, the position of the hot-melt rods can be adjusted according to the different diameters of the thick or thin pipes, achieving hot-melt welding of the inner wall of thick pipes or the outer wall of thin pipes of various diameters.

Description

Technical Field

[0001] This disclosure pertains to the field of pipeline laying, specifically relating to a municipal road drainage pipe installation device and its installation method. Background Technology

[0002] Pipe connection is a crucial part of drainage pipe construction, directly affecting the quality of the project. Drainage pipes are mostly thermoplastic materials, and butt welding machines are commonly used welding equipment that utilizes butt welding technology to weld thermoplastic pipes and fittings. Current butt welding machines typically consist of a pair of cooperating welding heads. One head is used to fit onto the outer wall of the thinner pipe for butt welding, while the other head is inserted into the inner wall of the thicker pipe for butt welding. After butt welding, the thicker pipe's butt weld is placed on the thinner pipe's butt weld, and after cooling, the butt welding is complete. However, because the diameter of the welding heads in existing equipment is specifically designed for different pipe diameters, a pair of welding heads is only suitable for welding a pair of pipes of the same diameter. Therefore, current technology has the problem of being inconvenient for butt welding pipes of various diameters. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this disclosure is to provide a municipal road drainage pipe installation device and its installation method, which solves the problem that existing technologies are not convenient for hot-melt butt welding of pipes of various diameters and specifications.

[0004] The objective of this disclosure can be achieved through the following technical solutions:

[0005] A municipal road drainage pipe installation device includes a base plate with a pair of coaxially placed turntables on the base plate. The central axis of the turntables is parallel to the base plate. Multiple slide rails are fixed on the side of the turntables that are far apart from each other, and are evenly distributed in a ring around the central axis of the turntables. Each turntable has a corresponding diameter line that is coaxially placed with the central axis of the corresponding slide rail. Each slide rail is provided with a sliding block that is engaged with the slide block. A hot melt rod is fixedly installed on each slide block and is coaxially placed with the turntable. A first threaded rod is rotatably connected to each turntable and is threadedly connected to a connecting plate that is coaxially placed. A connecting plate is fixed on each slide block near the central axis of the turntable and is coaxially placed with the hot melt rod. A connecting rod is provided between the connecting plate and the connecting plate. One end of the connecting rod is hinged to the peripheral wall of the turntable, and the other end of the connecting rod is hinged to the end of the connecting plate away from the turntable. In the initial state, any one connecting plate is located at the end of the corresponding first threaded rod near the turntable, and the other connecting plate is located at the end of the corresponding first threaded rod away from the turntable.

[0006] A dual-axis rotating motor is placed coaxially between the turntables. Each of the dual-axis rotating motors has a rotating shaft at its output end. The rotating shaft passes through the turntable and is rotatably connected to it. One end of each rotating shaft is fixed to a first threaded rod, and the threads of the two first threaded rods are opposite.

[0007] Each rotating shaft is rotatably connected to a coaxially placed chuck, which is located between the turntable and the dual-axis rotating motor. Each rotating shaft is rotatably connected to a coaxially placed connecting pipe, one end of which is fixed to the housing wall of the dual-axis rotating motor, and the other end of which is fixed to the chuck. The chuck's peripheral sidewall is provided with uniformly distributed grooves in a ring, the number of which is equal to the number of hot melt rods and corresponds one-to-one with the hot melt rods. Multiple uniformly distributed ear plates in a ring are fixed to the peripheral sidewall of the turntable, the number of which is equal to the number of grooves and corresponds one-to-one with the grooves. Each ear plate is provided with a connecting strip, which is coaxially placed with the hot melt rods. The connecting strip passes through the ear plate and is slidably connected to the ear plate. The end of the connecting strip near the dual-axis rotating motor is fixed with a retaining strip, which can be inserted into the corresponding groove and can slide along the groove.

[0008] The end of the first threaded rod away from the turntable is fixedly fitted with a first rolling bearing placed coaxially. A positioning plate is fixedly placed coaxially on the outer peripheral wall of the first rolling bearing. The positioning plate is provided with a first sliding groove that is evenly distributed in a ring. The number of the first sliding grooves is equal to that of the slide rails and corresponds one-to-one with the slide rails. The first sliding grooves are all placed coaxially with the corresponding slide rails. A sliding cone is fitted on the hot melt rod and placed coaxially. The hot melt rod passes through the corresponding first sliding groove. The sliding cone can pass through the corresponding first sliding groove and slide along the first sliding groove. The diameter of the sliding cone near the end of the dual-axis rotating motor is larger than the diameter of the other end. A telescopic tube is fixed to the end of the connecting strip near the sliding cone. The other end of the telescopic tube is fixed to the peripheral wall of the corresponding sliding cone near the end of the dual-axis rotating motor.

[0009] Let S be the distance between the sliding cone away from the turntable and the positioning plate, and let L be the distance between the chuck away from the side of the dual-axis rotating motor and the chuck near the dual-axis rotating motor, and let S = L.

[0010] Each hot melt bar is fitted with a spring placed coaxially. One end of each spring is fixed to the slider, and the other end of each spring is fixed to the end of the sliding cone near the turntable. A limit ring is fixed on the peripheral wall of the end of the sliding cone near the turntable. The diameter of the limit ring is larger than the width of the first slide groove. The limit ring is located on the side of the positioning plate near the turntable, and the spring is always in a compressed state.

[0011] A pair of symmetrically placed second slide grooves are provided on the base plate. The second slide grooves are both perpendicular to the rotating shaft and are located on the side of the two positioning discs away from the turntable. Each second slide groove contains a rotatably connected gear, which is parallel to the base plate. The central axis of the gear is in the same vertical plane as the central axis of the turntable. Each second slide groove contains a pair of coaxially placed straight racks. The two straight racks in the same second slide groove are centrally symmetrical about the central axis of the gears and are meshed with the gears. Both straight racks can slide along the groove wall. Each second slide groove contains a coaxially placed telescopic cylinder. The telescopic cylinder rod is fixed to any one of the straight racks. Above each second slide groove is a pair of symmetrically placed clamping plates. The clamping plates are symmetrical about the plane containing the central axes of the gears and the turntable. The side of the clamping plates that is close to each other is an isosceles triangular groove. The symmetrical plane of the isosceles triangular groove on any clamping plate is at the same height as the central axis of the turntable and parallel to the base plate. Each clamping plate corresponds to a straight rack and is fixed to the upper end face of the corresponding straight rack.

[0012] A vertically placed support is fixed on the base plate. A dual-axis rotating motor is connected to a mounting block fixed on the bottom peripheral wall. The rotating motor is fixedly installed on the support. The output end of the rotating motor is provided with a vertically placed second threaded rod. The second threaded rod passes through the mounting block and is threadedly connected to the mounting block. A third sliding groove is provided on the support. The third sliding groove is placed coaxially with the second threaded rod. One end of the mounting block is located in the third sliding groove and is slidably engaged with the third sliding groove.

[0013] A positioning block is fixed on the base plate. When the lower end face of the mounting block is in contact with the positioning block, the central axis of the turntable and the plane of symmetry of the isosceles triangular groove of the clamping plate are at the same height.

[0014] The beneficial effects of this disclosure are:

[0015] 1. The present invention, through the cooperation of a turntable, a first threaded rod, a connecting plate, a connecting rod, a connecting plate, a slide rail, a slider, and a hot melt rod, can adjust the position of the hot melt rod according to the different diameters of the thick or thin pipes, thereby achieving hot melting of the inner wall of the thick pipe or the outer wall of the thin pipe of various different diameters.

[0016] 2. This invention utilizes the cooperation of a sliding cone, positioning disc, connecting strip, clamping strip, telescopic tube, chuck, slot, connecting tube, dual-axis rotating motor, and rotating shaft, along with the linkage of a first threaded rod, connecting disc, connecting rod, connecting plate, and slider. When the hot melt rod is not in contact with the side wall of the pipe fitting, the turntable remains fixed, allowing the connecting disc and the first threaded rod to engage in threaded transmission, thereby automatically adjusting the position of the hot melt rod according to the diameter of the pipe fitting. When the sliding cone presses against the side wall of the pipe fitting until the hot melt rod adheres to the side wall, the clamping strip separates precisely from the slot. At this point, the first threaded rod will drive the connecting disc, turntable, and hot melt rod to rotate, uniformly hot-melting the periphery of the pipe fitting. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a partial structural schematic diagram of the present invention;

[0020] Figure 3 This is an appendix to the present invention. Figure 2 A magnified view of the structure at point A in the middle;

[0021] Figure 4 This is a schematic diagram of the positioning disk and connecting strip of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the turntable and connecting rod of the present invention;

[0023] Figure 6 This is a schematic diagram of the dual-axis rotating motor and connecting plate of the present invention;

[0024] Figure 7 This is a schematic diagram of the slide rail structure of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0026] like Figures 1 to 7As shown, a municipal road drainage pipe installation device includes a base plate 1. A pair of coaxially placed turntables 2 are mounted on the base plate 1, with the central axis of the turntables 2 parallel to the base plate 1. Multiple slide rails 3, evenly distributed in a ring around the central axis of each turntable 2, are fixed on the opposite side of each turntable 2. Each turntable 2 has a corresponding diameter line coaxially placed with the central axis of the corresponding slide rail 3. Each slide rail 3 is equipped with a sliding block 4, and a hot melt rod 5 is fixedly mounted on each block 4. The hot melt rods 5 are coaxially placed with the turntable 2. Each turntable 2 is rotatably connected to a coaxially placed... The first threaded rod 6 is threadedly connected to a connecting plate 7 placed on the same axis. The slider 4 is fixed with a connecting plate 8 near the central axis of the turntable 2. The connecting plate 8 is placed on the same axis as the hot melt rod 5. The connecting plate 8 is provided with a connecting rod 9 between the connecting plates 7. One end of the connecting rod 9 is hinged to the peripheral wall of the turntable 2, and the other end of the connecting rod 9 is hinged to the end of the connecting plate 8 away from the turntable 2. In the initial state, any connecting plate 7 is located at the end of the corresponding first threaded rod 6 near the turntable 2, and the other connecting plate 7 is located at the end of the corresponding first threaded rod 6 away from the turntable 2.

[0027] During operation, the connecting plate 7, located near the turntable 2, is used for hot-melting processing of the thicker tube, while the connecting plate 7, located away from the turntable 2, is used for hot-melting processing of the thinner tube. The thicker tube is placed at its corresponding hot-melting processing end and kept coaxial with the turntable 2, ensuring that each hot-melting rod 5 is located inside the inner wall of the thicker tube. The thinner tube is placed at its hot-melting processing end and kept coaxial with the turntable 2, ensuring that each hot-melting rod 5 is located outside the outer wall of the thinner tube. Then, the first threaded rod 6 is rotated, while the turntable 2 is fixed to prevent it from rotating with the first threaded rod 6. At this time, the connecting plate 7 rotates with the first threaded rod 6, engaging in threaded transmission. This causes the connecting plate 7 at the hot-melting processing end of the thicker tube to move away from the turntable 2, and the connecting plate 7 at the hot-melting processing end of the thinner tube to move closer to the turntable 2. The connecting plate 7 drives the connecting rod 9, which in turn drives the connecting plate 8, the slider 4, and the hot-melting rods in sequence. 5. The hot melt rods 5 at the coarse pipe hot melt processing end continuously move away from the central axis of the turntable 2, while the hot melt rods 5 at the thin pipe hot melt processing end continuously move closer to the central axis of the turntable 2, until the hot melt rods 5 at the coarse pipe hot melt processing end contact the inner wall of the coarse pipe, and the hot melt rods 5 at the thin pipe hot melt processing end complete the pipe wall contact with the thin pipe; then the hot melt rods 5 are turned on for hot melt heating, while the turntable 2 is rotated. The turntable 2 drives the hot melt rods 5 to rotate, so that the hot melt rods 5 at the coarse pipe hot melt processing end uniformly heat and melt the inner wall of the coarse pipe, and the hot melt rods 5 at the thin pipe hot melt processing end uniformly heat and melt the outer wall of the thin pipe. After the hot melt is completed, the thin pipe is inserted into the coarse pipe, and the outer wall of the thin pipe is attached to the inner wall of the coarse pipe. After cooling, the pipe connection is completed. This device can adjust the position of the hot melt rods 5 according to the different diameters of the coarse or thin pipes to achieve hot melt of the inner wall of the coarse pipe or the outer wall of the thin pipe of various diameters.

[0028] To facilitate control of the rotation of the first threaded rod 6 and maintain the opposite movement of the two connecting discs 7, a dual-axis rotary motor 10 is coaxially placed between the turntables 2. Each output end of the dual-axis rotary motor 10 is equipped with a rotating shaft 11, which passes through the turntable 2 and is rotatably connected to it. One end of each rotating shaft 11 is fixed to the first threaded rod 6, and the threads of the two first threaded rods 6 are opposite in direction. When the dual-axis rotary motor 10 is turned on, the output end of the dual-axis rotary motor 10 drives the rotating shaft 11, which in turn drives the first threaded rod 6 to rotate. At the same time, the threads of the two first threaded rods 6 are opposite in direction, which allows the two connecting discs 7 to maintain opposite movement when their threads mesh with the first threaded rods 6.

[0029] To facilitate selective control of the fixed or rotating motion of the turntable 2, chucks 12 are rotatably connected to the rotating shaft 11, each chuck 12 positioned between the turntable 2 and the dual-axis rotating motor 10. Connecting pipes 13 are rotatably connected to the rotating shaft 11, each connecting pipe 13 having one end fixed to the housing wall of the dual-axis rotating motor 10 and the other end fixed to the chuck 12. The chuck 12 has evenly distributed ring-shaped clamping devices on its peripheral sidewalls. The number of slots 121 is equal to the number of hot melt rods 5, and each slot corresponds to one hot melt rod 5. Multiple ear plates 14 are fixed on the two circumferential side walls of the turntable in a uniform annular distribution. The number of ear plates 14 is equal to the number of slots 121, and each ear plate 14 corresponds to one hot melt rod 5. Each ear plate 14 is provided with a connecting strip 15, which is placed coaxially with the hot melt rod 5. The connecting strip 15 passes through the ear plate 14 and is slidably connected to it. The connecting strip 15 is close to the dual-axis rotating motor 10. Each end is fixed with a retaining strip 16, which can be inserted into the corresponding slot 121 and can slide along the slot 121. When the connecting disc 7 needs to perform threaded meshing transmission, the retaining strip 16 is kept in the slot 121. At this time, the turntable 2 can be kept fixed through the connection of the connecting pipe 13, chuck 12, retaining strip 16, connecting strip 15, and ear plate 14, and the turntable 2 does not rotate with the rotating shaft 11. When the turntable 2 needs to be rotated to uniformly heat melt the side wall of the inlet pipe, the connecting strip 15 is moved. The connecting strip 15 drives the retaining strip 16, so that the retaining strip 16 is separated from the slot 121. At this time, the rotating shaft 11 drives the first threaded rod 6. Since the turntable 2 loses its fixed constraint and the turntable 2 is rotatably connected to the rotating shaft 11, the first threaded rod 6 will drive the connecting disc 7 to rotate. The connecting disc 7 will drive the connecting rod 9, slider 4, hot melt rod 5, slide rail 3, and turntable 2 to rotate in sequence, so as to achieve selective control of the fixation or rotation of the turntable 2.

[0030] To facilitate automatic control of the separation timing of the clip 16 and the slot 121 according to different pipe diameters, the end of the first threaded rod 6 away from the turntable 2 is fixedly fitted with a first rolling bearing placed on the same axis. The outer peripheral wall of the first rolling bearing is fixed with a positioning plate 17 placed on the same axis. The positioning plate 17 is provided with a first sliding groove 171 that is evenly distributed in a ring. The number of first sliding grooves 171 is equal to that of the slide rail 3 and corresponds one-to-one with the slide rail 3. The first sliding grooves 171 are all placed on the same axis as the corresponding slide rail 3. The hot melt rod 5 is fitted with a sliding cone 18 placed on the same axis. The hot melt rod 5 passes through the corresponding first sliding groove 171. The sliding cone 18 can pass through the corresponding first sliding groove 171 and slide along the first sliding groove 171. The diameter of the sliding cone 18 near the end of the dual-axis rotating motor 10 is larger than the diameter of the other end. The end of the connecting strip 15 near the sliding cone 18 is fixed with a telescopic tube 151. The other end of the telescopic tube 151 is fixed to the peripheral wall of the end of the corresponding sliding cone 18 near the dual-axis rotating motor 10.

[0031] The distance between the sliding cone 18 away from the turntable 2 end and the positioning plate 17 is set as S, and the distance between the chuck 16 away from the side of the dual-axis rotating motor 10 and the chuck 12 near the dual-axis rotating motor 10 is set as L, and S = L;

[0032] One end of the pipe fitting to be heat-fused is attached to the positioning plate 17. Then, through the threaded engagement of the first threaded rod 6 and the connecting plate 7, the connecting plate 7 drives the connecting rod 9, the slider 4, the heat fusion rod 5, and the sliding cone 18. The heat fusion rod 5 drives the sliding cone 18 to continuously adhere to the peripheral wall of the pipe fitting. The peripheral wall of the sliding cone 18 continuously presses against the peripheral wall of the pipe fitting. The mutual pressing causes the sliding cone 18 to continuously move closer to the end of the turntable 2. During the movement, the sliding cone 18 drives the telescopic tube 151, the connecting strip 15, and the locking strip 16 to move synchronously. When the sliding cone 18 moves away from the end of the turntable 2 and is completely inside the first sliding groove 171, the peripheral wall of the heat fusion rod 5 is just in contact with the peripheral wall of the pipe fitting, and the locking strip 16 is just separating from the locking groove 121. This achieves the purpose of automatically controlling the separation time of the locking strip 16 from the locking groove 121 according to the different pipe diameters.

[0033] To facilitate the reset of the sliding cone 18, springs 19 are coaxially placed on each of the hot melt rods 5. One end of each spring 19 is fixed to the slider 4, and the other end of each spring 19 is fixed to the end of the sliding cone 18 near the turntable 2. A limit ring is fixed on the peripheral wall of the end of the sliding cone 18 near the turntable 2. The diameter of the limit ring is larger than the width of the first slide groove 171. The limit ring is located on the side of the positioning plate 17 near the turntable 2, and the spring 19 is always in a compressed state. When the sliding cone 18 moves, it squeezes and compresses the spring 19. When the hot melt is completed and the pipe is separated from the hot melt rod 5, the spring 19 pops out and pushes the sliding cone 18 to reset.

[0034] To facilitate centering and clamping of the pipe fittings and maintain their coaxial placement with the turntable 2 during the hot-melt process, a pair of symmetrically placed second slide grooves 20 are provided on the base plate 1. Each second slide groove 20 is perpendicular to the rotating shaft 11 and located on the side of the two positioning discs 17 furthest from the turntable 2. Each second slide groove 20 contains a rotatably connected gear 21, which is parallel to the base plate 1. The central axis of each gear 21 is in the same vertical plane as the central axis of the turntable 2. Each second slide groove 20 also contains a pair of coaxially placed straight racks 22. The two straight racks 22 within the same second slide groove 20 are centrally symmetrical about the central axis of the gear 21. The gear 21 is meshed with the rack 22 and can slide along the wall of the second slide groove 20. The second slide groove 20 is fixedly installed with a telescopic cylinder 23 placed in the same axis. The telescopic rod of the telescopic cylinder 23 is fixed to any rack 22. A pair of symmetrically placed clamping plates 24 are provided directly above the second slide groove 20. The clamping plates 24 are symmetrically placed about the plane of the central axis of the gear 21 and the turntable 2. The side of the clamping plates 24 that is close to each other is an isosceles triangular groove. The symmetrical plane of the isosceles triangular groove on any clamping plate 24 is at the same height as the central axis of the turntable 2 and parallel to the base plate 1. The clamping plates 24 correspond one-to-one with the rack 22. The clamping plates 24 are fixed to the upper end face of the corresponding rack 22.

[0035] The telescopic cylinder 23 extends and retracts, driving the rack 22. The rack 22 drives the gear 21, which in turn drives another rack 22. The rack 22 drives the clamping plate 24, causing the two clamping plates 24 to move closer or further apart. The pipe is clamped by the two clamping plates 24 moving closer together. During the clamping process, the isosceles triangular groove continuously presses against the peripheral wall of the pipe, keeping the central axis of the pipe collinear with the central axis of the turntable 2, thus facilitating the centering and clamping of the pipe.

[0036] To facilitate the connection of pipe fittings after heat fusion, a vertically placed support member 25 is fixed on the base plate 1. A dual-axis rotary motor 10 is connected to a mounting block 26 fixed on the bottom peripheral wall. A rotary motor 27 is fixedly mounted on the support member 25. The output end of the rotary motor 27 is provided with a vertically placed second threaded rod 28. The second threaded rod 28 passes through the mounting block 26 and is threadedly connected to the mounting block 26. A third sliding groove 251 is provided on the support member 25. The third sliding groove 251 is placed coaxially with the second threaded rod 28. One end of the mounting block 26 is located in the third sliding groove 251 and is connected to the second threaded rod 28. The three sliding grooves 251 slide and snap together; after the heat fusion is completed, the pipe is moved away from the dual-axis rotating motor 10 along its axial direction, so that the heat fusion rod 5 is separated from the pipe. Then the rotating motor 27 is turned on. The output end of the rotating motor 27 drives the second threaded rod 28. The second threaded rod 28 drives the mounting block 26, so that the mounting block 26 and the second threaded rod 28 perform threaded gear transmission, so that the mounting block 26 moves up along the third sliding groove 251. The mounting block 26 drives the dual-axis rotating motor 10, the rotating shaft 11, and the turntable 2 to move up, and then pushes the two pipes closer to each other along their axial direction to complete the docking.

[0037] To prevent excessive movement of the mounting block 26 during resetting, which could cause the central axis of the turntable 2 to deviate from the central axis of the pipe fitting, a positioning block 29 is fixed on the base plate 1. When the lower end face of the mounting block 26 is in contact with the positioning block 29, the central axis of the turntable 2 and the symmetrical plane of the isosceles triangular groove of the clamping plate 24 are at the same height; the positioning block 29 prevents excessive movement of the mounting block 26 during resetting.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.

Claims

1. A municipal road drain pipe installation device comprising a base plate (1), characterized in that, The bottom plate (1) is provided with a pair of coaxial rotary plates (2), the central axes of the rotary plates (2) are parallel to the bottom plate (1), and the rotary plates (2) are away from each other; a plurality of slide rails (3) are uniformly distributed around the central axes of the rotary plates (2) and are fixed to the sides of the rotary plates (2) away from each other; the rotary plates (2) are provided with corresponding diameters and the central axes of the corresponding slide rails (3) are coaxially arranged; the slide rails (3) are provided with sliding blocks (4) that are slidably connected; the sliding blocks (4) are fixedly provided with hot melting rods (5); the hot melting rods (5) are coaxially arranged with the rotary plates (2); the rotary plates (2) are rotatably connected with first threaded rods (6) that are coaxially arranged; the first threaded rods (6) are threadedly connected with connecting discs (7) that are coaxially arranged; the sliding blocks (4) are fixedly provided with connecting plates (8) that are coaxially arranged with the hot melting rods (5); the connecting plates (8) are provided with connecting rods (9) between the connecting discs (7); one ends of the connecting rods (9) are hingedly connected with the peripheral walls of the rotary plates (2); the other ends of the connecting rods (9) are hingedly connected with the connecting plates (8) away from the rotary plates (2); and in the initial state, any connecting disc (7) is located at one end of the corresponding first threaded rod (6) close to the rotary plate (2), and the other connecting disc (7) is located at the other end of the corresponding first threaded rod (6) away from the rotary plate (2). The rotary plates (2) are provided with a double-shaft rotary motor (10) that is coaxially arranged; the output ends of the double-shaft rotary motor (10) are provided with shafts (11); the shafts (11) pass through the rotary plates (2) and are rotatably connected with the rotary plates (2); one ends of the shafts (11) are fixedly connected with the first threaded rods (6); and the threaded directions of the two first threaded rods (6) are opposite. The shafts (11) are rotatably connected with chucks (12) that are coaxially arranged; the chucks (12) are located between the rotary plates (2) and the double-shaft rotary motor (10); the shafts (11) are rotatably connected with connecting pipes (13) that are coaxially arranged; one ends of the connecting pipes (13) are fixedly connected with the peripheral walls of the double-shaft rotary motor (10); the other ends of the connecting pipes (13) are fixedly connected with the chucks (12); the peripheral side walls of the chucks (12) are provided with ring-shaped and uniformly distributed clamping grooves (121); the number of the clamping grooves (121) is equal to that of the hot melting rods (5) and corresponds to the hot melting rods (5) one by one; the peripheral side walls of the rotary plates (2) are fixedly provided with a plurality of ring-shaped and uniformly distributed ear plates (14); the number of the ear plates (14) is equal to that of the clamping grooves (121) and corresponds to the clamping grooves (121) one by one; the ear plates (14) are provided with connecting strips (15) that are coaxially arranged with the hot melting rods (5); the connecting strips (15) pass through the ear plates (14) and are slidably connected with the ear plates (14); one ends of the connecting strips (15) close to the double-shaft rotary motor (10) are fixedly provided with clamping strips (16); the clamping strips (16) can be inserted into the corresponding clamping grooves (121); and the clamping strips (16) can slide along the clamping grooves (121).

2. A municipal road drain installation apparatus according to claim 1, wherein The first threaded rod (6) is fixed with a first rolling bearing coaxially arranged at one end away from the rotating disc (2). The outer side wall of the first rolling bearing is fixed with a positioning disc (17) coaxially arranged. The positioning disc (17) is provided with a plurality of annular first sliding grooves (171) distributed thereon. The number of the first sliding grooves (171) is equal to that of the sliding rails (3) and corresponds to the sliding rails (3) one by one. The first sliding grooves (171) are coaxially arranged with the corresponding sliding rails (3). The hot melting rod (5) is sleeved with a sliding cone (18) coaxially arranged. The hot melting rod (5) passes through the corresponding first sliding groove (171). The sliding cone (18) can pass through the corresponding first sliding groove (171) and can slide along the first sliding groove (171). The diameter of the sliding cone (18) near the double-shaft rotating motor (10) end is greater than that of the other end. The connecting strip (15) is fixed with an extension tube (151) at one end near the sliding cone (18). The other end of the extension tube (151) is fixed with the corresponding sliding cone (18) near the wall of the double-shaft rotating motor (10). The distance between the sliding cone (18) away from the rotating disc (2) and the positioning disc (17) is S. The distance between the clamping strip (16) away from the double-shaft rotating motor (10) side and the chuck (12) near the double-shaft rotating motor (10) is L, and S=L.

3. A municipal road drain installation apparatus according to claim 2, wherein The hot melting rod (5) is sleeved with a spring (19) coaxially arranged. One end of the spring (19) is fixed with the sliding block (4). The other end of the spring (19) is fixed with the sliding cone (18) near the rotating disc (2). The wall of the sliding cone (18) near the rotating disc (2) is fixed with a limiting ring. The diameter of the limiting ring is greater than the width of the first sliding groove (171). The limiting ring is located on the side of the positioning disc (17) near the rotating disc (2). The spring (19) is always in a compressed state.

4. The municipal road drain pipe installation apparatus according to claim 1, wherein A pair of symmetrical second sliding grooves (20) are formed on the bottom plate (1), the second sliding grooves (20) are vertically arranged relative to the rotating shaft (11), the second sliding grooves (20) are located on the sides of the two positioning discs (17) away from the rotating disc (2), the second sliding grooves (20) are each provided with a rotatingly connected gear (21), the gears (21) are parallel to the bottom plate (1), the central axes of the gears (21) are located in the same vertical plane as the central axis of the rotating disc (2), a pair of coaxially arranged straight racks (22) are arranged in each second sliding groove (20), the two straight racks (22) in the same second sliding groove (20) are centrally symmetrically arranged relative to the central axis of the gear (21), the straight racks (22) are in meshing connection with the gear (21), the straight racks (22) can slide along the groove wall of the second sliding groove (20), a coaxially arranged telescopic cylinder (23) is fixedly installed in each second sliding groove (20), the telescopic rods of the telescopic cylinders (23) are fixed to the straight racks (22), a pair of symmetrical clamping plates (24) are arranged above the second sliding grooves (20), the clamping plates (24) are symmetrically arranged relative to the plane in which the central axes of the gear (21) and the rotating disc (2) are located, the sides of the clamping plates (24) that are close to each other are each in the shape of an isosceles triangle recess, the symmetric planes of the isosceles triangle recesses on any clamping plate (24) are at the same height as the central axis of the rotating disc (2) and are parallel to the bottom plate (1), the clamping plates (24) correspond to the straight racks (22) in one-to-one correspondence, and the clamping plates (24) are fixed to the upper end surfaces of the corresponding straight racks (22).

5. The municipal road drain pipe installation apparatus according to claim 1, wherein A support member (25) is fixed vertically on the bottom plate (1), the mounting block (26) is connected to the bottom peripheral side wall of the double-shaft rotating motor (10), a rotating motor (27) is fixedly installed on the support member (25), a second threaded rod (28) is arranged vertically downward on the output end of the rotating motor (27), the second threaded rod (28) penetrates through the mounting block (26) and is in threaded connection with the mounting block (26), a third sliding groove (251) is formed on the support member (25), the third sliding groove (251) is coaxially arranged relative to the second threaded rod (28), and one end of the mounting block (26) is located in the third sliding groove (251) and is in sliding connection with the third sliding groove (251).

6. A municipal road drain installation apparatus according to claim 5, wherein A positioning block (29) is fixed on the bottom plate (1), when the lower end surface of the mounting block (26) is attached to the positioning block (29), the central axis of the rotating disc (2) is at the same height as the symmetric plane of the isosceles triangle recess of the clamping plate (24).

Images