Pipeline butt joint device for water conservancy project

Abstract

A pipeline butt joint device for hydraulic engineering relates to the field of pipeline butt joint for hydraulic engineering and comprises at least three groups of supporting vehicles, each supporting vehicle comprises a chassis, wheels are connected to the bottom of the chassis, a frame is connected to the chassis, a winch is connected to the chassis, a fixed pulley is connected to the top of the frame, and a winding rope of the winch bypasses the fixed pulley and is connected with a hanging bracket. Symmetrical rack plates are connected to the bottom of the hanging bracket, and brackets are connected to the rack plates. A mounting seat is connected to the bottom of the hanging bracket, a double-shaft motor is arranged on the mounting seat, rotating shafts are connected to output shafts on the two sides of the double-shaft motor, a supporting lug is connected to the bottom of the hanging bracket, a gear is rotationally connected to the supporting lug, the gear is in key connection with the rotating shafts, and the gear is meshed with the rack plate. According to the pipeline butt joint device, enough operation space is reserved, a base does not need to be excavated any more, the butt joint efficiency is improved, and the whole device is simple in structure and meets the requirement for complexity of the field construction environment of water conservancy projects.

Description

Technical Field

[0001] The invention relates to the field of water conservancy projects, and in particular to a pipeline docking device used in water conservancy projects. Background Art

[0002] Pipe connection technology in water conservancy projects is a key link to ensure the safe operation of water supply, drainage, irrigation and other systems. In water conservancy projects, steel corrugated pipes are widely used in drainage, sewage, water supply and other scenarios due to their high ring stiffness, corrosion resistance, light weight and convenient construction.

[0003] In water conservancy projects, the corrosion protection and sealing of the interface of steel belt corrugated pipes are the key links to ensure the long-term stable operation of the pipeline. As an efficient protection technology, heat shrink sleeves are widely used in the corrosion protection, waterproofing and mechanical protection of the joint parts of steel belt corrugated pipes. Generally include: base material, radiation cross-linked polyolefin, with high weather resistance and UV resistance; inner layer, hot melt adhesive (EVA or butyl rubber), which is tightly bonded to the pipe surface after high temperature melting; reinforcement layer, glass fiber or aluminum foil interlayer, used to enhance the ability to resist mechanical damage. By heating (120~150℃), the base material shrinks by heat (shrinkage rate 30%~50%), tightly wrapping the pipe interface, and the hot melt adhesive fills the surface pores after melting to form a seamless waterproof and anti-corrosion layer.

[0004] When the heat shrink sleeve is connected to the pipe, the process is as follows: pretreatment of the pipe interface, surface treatment, use a wire brush or sandpaper to polish the interface area to remove the oxide layer and oil stains; preheating and dehumidification, use a flame spray gun to evenly heat the pipe surface to 50~60℃ to evaporate moisture; installation of the heat shrink sleeve, insert and position, put the heat shrink sleeve in the center of the interface, overlap the pipe body on both sides, and use positioning tape to temporarily fix it to avoid displacement; heating and shrinking, heating in sections, move the flame evenly from the middle to both ends, or from one end to the other (to avoid local overheating), first heat the middle of the shrink sleeve to eliminate wrinkles, and then extend it to both sides to ensure that the substrate is completely shrunk and fit, and heat the edges until the hot melt adhesive overflows to form a "glue line"; press and compact, press the shrink sleeve with a roller or the palm of your hand wearing high-temperature resistant gloves to eliminate bubbles and ensure that the adhesive layer is in close contact with the pipe; cooling and inspection, the pipe can be moved only after it is naturally cooled to below 40℃.

[0005] Under the existing technology, the steel belt corrugated pipe is hoisted and placed in the foundation pit through the hoisting system. The base is flat and a 10~20cm sand cushion layer is laid. When docking, the base of the pipe docking needs to be excavated to a certain depth to facilitate the docking operation of the pipes. After that, the base is backfilled after the heating and shrinking docking is completed. The existing docking method requires a deeper excavation depth for the base to reserve enough flame space required for flame gun heating, resulting in low overall docking efficiency.

[0006] The invention provides a pipe docking device for water conservancy projects, which lies across two sides of a foundation pit, supports two pipe ends to be docked, suspends the docking ends on a base, reserves operating space required by construction personnel, and improves docking efficiency. Summary of the invention

[0007] According to the problems raised in the background technology, the present invention provides a pipe docking device for water conservancy projects to solve the problems. The present invention will be further explained below.

[0008] A pipeline docking device for water conservancy projects includes at least three groups of support vehicles, the support vehicles include a chassis, wheels are connected to the bottom of the chassis, a frame is connected to the chassis, a winch is connected to the chassis, a fixed pulley is connected to the top of the frame, the winch rope is passed around the fixed pulley and connected to a hanger, a symmetrical rack plate is connected to the bottom of the hanger, a bracket is connected to the rack plate; a mounting seat is connected to the bottom of the hanger, a dual-axis motor is provided on the mounting seat, a rotating shaft is connected to the output shafts on both sides of the dual-axis motor, a support ear is connected to the bottom of the hanger, a gear is rotatably connected to the support ear, the gear is keyed to the rotating shaft, and the gear is meshed with the rack plate.

[0009] Preferably, two groups of brackets with equal heights are arranged in the axial direction of the pipe. The arrangement of the two groups of brackets allows the butt end of the pipe to have a high straightness, thereby ensuring the installation accuracy of the heat shrink sleeve.

[0010] Preferably, a slide plate is provided for sliding at the bottom of the hanger, and the end of the slide plate is connected to a pressure seat, and the pressure seat and the support seat are arc plates adapted to the pipe, and the end of the slide plate different from the pressure seat is connected to an end plate, and a positioning shaft is connected between the end plate and the hanger, and a first spring is sleeved on the positioning shaft, and the two ends of the first spring are in contact with the end plate and the hanger respectively; a guide frame is connected to the frame, and a guide groove is provided on the guide frame, and the guide groove includes an oblique groove and a vertical groove connected, and a sliding column is connected to the side of the end plate, and the sliding column is located in the guide groove. In the process of lifting the pipe downward, the sliding column first acts on the oblique groove of the guide frame for fixing the height, and finally presses tightly against the outer wall of the pipe, and at the same time, under the elastic force of the first spring, the pressure seat and the support seat clamp the pipe to maintain the roundness of the pipe, and the first spring maintains a constant compression amount, which not only ensures the purpose of maintaining the roundness of the pipe, but also avoids damage to the pipe.

[0011] The present invention realizes continuous pipe docking operation through three groups of support vehicles. One end of the current pipe has been docked, and the end to be docked with the subsequent pipe has been placed on the current support vehicle. The subsequent support vehicle is placed on a foundation pit away from the subsequent support vehicle, and the distance is the length of a pipe. The subsequent pipe is hoisted and placed between the subsequent support vehicle and the subsequent support vehicle, and both ends of the subsequent pipe are suspended above the base at a certain height. The current pipe and the subsequent pipe are docked through a heat shrink sleeve. After the docking is completed, the current support vehicle and the subsequent support vehicle release the current pipe and the subsequent pipe. At this time, both ends of the current pipe are docked. The current support vehicle and the subsequent support vehicle can be moved backwards, and then a new pipe is hoisted. The docking operation is completed in this way.

[0012] Preferably, a docking cylinder is connected to one side of the top of the frame, and a docking shaft is connected to the other side, a second guide frame is connected to the docking shaft, a positioning rod is slidably connected between the second guide frames, a latch is connected to the bottom of the positioning rod, and pin holes are provided on the docking cylinder and the docking shaft. The latch is simultaneously inserted into the pin holes on the docking cylinder and the docking shaft to temporarily lock the two support vehicles into one support vehicle group, at which time the support vehicle group can be rotated, the center of gravity of the support vehicle group is always on the base, and the support vehicle group can be directly pulled across the foundation pit.

[0013] Preferably, a slot is provided on the chassis, a rod is slidably provided in the slot, and a lever penetrating the slot is connected to the rod; a socket is provided on both the chassis and the rod, and a locking rod is provided at the socket. The support vehicle group is redundantly reinforced to ensure the strength of the support vehicle group to cross the foundation pit. When the support vehicle group is not formed, the rod is built into the slot on the chassis, and the locking rod extends into the slot to limit the locking rod and prevent it from sliding out; when the support vehicle group needs to be temporarily interlocked, the rod of one support vehicle is inserted into the slot of another support vehicle until the sockets on the chassis and the rod overlap, and then the locking rod is inserted down into the socket to achieve redundant locking of the support vehicle group.

[0014] Preferably, the insertion rod of the support vehicle is pushed out of the slot and inserted into the slot of the other support vehicle, and when it stops after abutting against the locking rod of the other support vehicle, the chassis of the support vehicle and the insertion hole on the insertion rod overlap. It is intended that when the upper part of the support vehicle is locked, it is only necessary to push the insertion rod at the bottom until it abuts against the locking rod in the other support vehicle, so that the chassis and the insertion hole on the insertion rod can overlap.

[0015] Preferably, it also includes a positioning component, and a position avoidance groove is provided at the bottom of the frame. The positioning component includes a screw rod that is rotatably provided in the position avoidance groove, and one end of the screw rod that passes through the position avoidance groove is connected to a screw cap, and the screw rod is threaded with an adjustment rod, and a positioning piece is provided on the adjustment rod. When hoisting the pipe, the position of the positioning piece can be adjusted by simply turning the screw cap. To hoist the pipe, it is only necessary to move the pipe below to the height of the bracket, and then translate it toward the positioning piece until the end of the pipe abuts against the positioning piece and stops. After the two support vehicles are locked, the distance between them is fixed, and the position of the positioning piece only needs to be adjusted once, and there is no need to adjust the position of the positioning piece thereafter.

[0016] Preferably, the positioning assembly is also provided with two groups symmetrical about the hanger in the direction of the pipeline axis, the positioning piece is slidably arranged on the adjustment rod, one end of the positioning piece is connected to a limit cap, and the other end is connected to a stop circle, a second spring is provided on the positioning piece, and the two ends of the second spring contact the adjustment rod and the stop circle respectively. After the position of the adjustment rod is adjusted, the pipeline is hoisted, and when the pipeline is moved down to the height of the bracket, the stop circle away from the butt end is first contacted, and the positioning piece is retracted by squeezing the stop circle.

[0017] Preferably, the edge of the stop circle is rounded. When the pipeline surface has corrugations, the pipeline can be moved between the corrugations on the pipeline surface by rounding the edge when the pipeline is hoisted and moved sideways.

[0018] Beneficial effects: Compared with the prior art, the pipe docking device of the present invention can carry out cyclic docking of pipes in the foundation pit through three groups of support vehicles. Any two groups can suspend the two pipes to be docked in a certain space above the base. The two groups of support vehicles are locked together through a redundant interlocking mechanism to achieve structural stability. Based on this, the one-time hoisting of the pipes during hoisting can be assisted to meet the size requirements of the heat shrink sleeve installation. At the same time, the two locked groups of support vehicles can rotate together and cross the foundation pit for easy movement. A pressure seat is set on the support vehicle. When hoisting the pipe, in the process of the pipe moving down, the linkage pressure seat moves to press tightly on the outer wall of the pipe, and the connecting support seat clamps the pipe to maintain the roundness of the pipe. At the same time, the two groups of support seats in the axial direction of the pipe maintain the straightness of the pipe. In this way, the pipe docking device of the present invention reserves sufficient operating space, no longer needs to excavate the base, improves the docking efficiency, and the overall device structure is simple, which meets the complexity requirements of the field construction environment of water conservancy projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : A schematic structural diagram of the support vehicle of the present invention; Figure 2 : Another structural schematic diagram of the support vehicle of the present invention Figure 3 : Figure 2 A magnified schematic diagram of the structure at center A; Figure 4 : Schematic diagram of two groups of support vehicles locked into a support vehicle group; Figure 5 : Figure 4 A magnified schematic diagram of the structure at B in the middle; Figure 6 : The effect diagram of using the pipeline docking device of the present invention to perform pipeline circulation docking; In the figure: supporting vehicle 1, chassis 2, wheel 3, frame 4, avoidance groove 401, winch 5, fixed pulley 6, hanger 7, rack plate 8, bracket 9, pipeline 10, mounting seat 11, dual-axis motor 12, rotating shaft 13, support ear 14, gear 15, pressure seat 16, slide plate 17, end plate 18, positioning shaft 19, first spring 20, guide frame 21, oblique groove 211, vertical groove 212, slide column 22, docking tube 23, docking shaft 24, second guide frame 25, positioning rod 26, latch 27, insertion rod 28, lever 29, locking rod 30, in-place member 31, screw 32, screw cap 33, adjusting rod 34, limiting cap 35, stop circle 36, second spring 37. DETAILED DESCRIPTION

[0020] Next, combine with Figure 1-Figure 6 A specific embodiment of the present invention is described in detail.

[0021] Reference Figure 1-Figure 3 A pipe docking device for water conservancy projects includes at least two groups of support vehicles 1, the support vehicle 1 includes a chassis 2, a wheel 3 is connected to the bottom of the chassis 2, a frame 4 is connected to the chassis 2, a winch 5 is connected to the chassis 2, a fixed pulley 6 is connected to the top of the frame 4, a winding rope of the winch 5 is passed around the fixed pulley 6 and connected to a hanger 7, a symmetrical rack plate 8 is connected to the bottom of the hanger 7, a bracket 9 is connected to the rack plate 8, and the symmetrical bracket 9 is used to carry the pipe 10 to be docked.

[0022] When in use, two sets of support vehicles 1 are placed horizontally on both sides of the foundation pit, and two sets of brackets 9 symmetrical about the pipeline are close to each other. The two sets of pipelines 10 to be connected are hoisted and lifted by the hoisting system and transferred to the brackets 9, and the weight of the pipelines is gradually transferred to the brackets. Then, the pipelines are gradually lowered, and the weight of the pipelines will gradually press down the brackets 9, and the winch 5 is released until it stops at a certain height above the base. In this way, the butt ends of the pipelines to be connected are close to and suspended on the base, and space is reserved for cleaning the ends of the pipelines, installing heat shrink sleeves and heat treatment. At this time, the non-butt ends of the pipelines are directly placed on the base.

[0023] Based on the fact that the pipeline has sufficient length and a certain toughness, the butt end can be suspended at a small height on one side. In this embodiment, two groups of brackets 9 are arranged in the axial direction of the pipeline 10. The arrangement of the two groups of brackets makes the butt end of the pipeline have a high straightness, thereby ensuring the installation accuracy of the heat shrink sleeve.

[0024] After the docking is completed, the pipeline needs to be placed in the foundation pit. This embodiment adopts the following technical solution to release the pipe 10 by the bracket 9: the bottom of the hanger 7 is connected to a mounting seat 11, and a dual-axis motor 12 is provided on the mounting seat 11. The output shafts on both sides of the dual-axis motor 12 are connected to a rotating shaft 13; the bottom of the hanger 7 is connected to a support ear 14, and a gear 15 is rotatably connected to the support ear 14. The gear 15 is key-connected to the rotating shaft 13, and the gear 15 is meshed with the rack plate 8. After the docking is completed, the dual-axis motor 12 is started to drive the gear 15 to rotate, and the rack plate 8 is meshed with the gear and the rack plate 8 to make the rack plate 8 retreat, that is, the brackets 9 that symmetrically hold the pipe 10 are moved away from each other, and the pipe 10 is released, and the pipe falls on the base.

[0025] The present invention ensures the straightness of the butt end of the pipe by setting two groups of symmetrical brackets. Furthermore, the present embodiment also ensures the roundness of the butt end of the pipe by setting a pressure seat 16 to cooperate with the bracket 9. Specifically: a slide plate 17 is slidably provided at the bottom of the hanger 7, and the end of the slide plate 17 is connected to the pressure seat 16. The pressure seat 16 and the bracket 9 are both arc plates adapted to the pipe 10. The end of the slide plate 17 different from the pressure seat is connected to the end plate 18. A positioning shaft 19 is connected between the end plate 18 and the hanger 7. A first spring 20 is sleeved on the positioning shaft 19. The two ends of the first spring 20 are in contact with the end plate 18 and the hanger 7 respectively. A guide frame 21 is connected to the frame 4. A guide groove is provided on the guide frame 21. The guide groove includes a connected oblique groove 211 and a vertical groove 212. A sliding column 22 is connected to the side of the end plate 18, and the sliding column 22 is located in the guide groove.

[0026] Before hoisting the pipe 10, the brackets 9 are close to each other and the brackets are located at a high position; then the pipe 10 is hoisted and placed on the brackets 9 and slowly lowered to the base. At this time, the winch cooperates to lower the hanger 7. During the downward movement of the hanger 7, the slide column 22 moves down with the hanger. During the downward movement, the slide column 22 first acts on the oblique groove 211 of the fixed height guide frame 21, and gradually pushes the symmetrical pressure seat 16 towards each other under the action of the oblique groove 211, and finally presses tightly on the outer wall of the pipe 10, and at the same time, the first spring 20 is compressed. Since the pressure seat 16, the bracket 9 and the pipe 10 are adapted, the elastic force of the first spring 20 can maintain the roundness of the pipe.

[0027] Since the foundation pit is generally deep and the diameter of the pipeline has a variety of conventional sizes, the slide column 22 is first pressed tightly against the outer wall of the pipeline before entering the vertical groove 212, and then after contacting the outer wall of the pipeline until entering the vertical groove 212, the hanger 7 continues to move downward and the first spring 20 continues to accumulate force; when the slide column 22 enters the vertical groove 212, the first spring 20 maintains the current compression amount, and the pressure seat 16 and the support seat 9 clamp the pipeline 10 and move downward synchronously until they reach the docking height of the base. This solution maintains the constant clamping force on the pipeline 10, which not only ensures the purpose of maintaining the roundness of the pipeline, but also avoids damage to the pipeline.

[0028] Reference Figure 6 In this embodiment, three groups of support vehicles 1 are generally used to achieve continuous pipe docking operations. The pipe that has been docked at one end is described as the current pipe below, and the pipe to be docked with it is described as the subsequent pipe. The two groups of support vehicles 1 are placed close to each other across the foundation pit. The one located on the current pipe is described as the current support vehicle, and the one located on the subsequent pipe is described as the subsequent support vehicle. One end of the current pipe has been docked, and the end to be docked with the subsequent pipe has been placed on the current support vehicle. Then another support vehicle, described as the secondary subsequent support vehicle, is placed on the foundation pit away from the subsequent support vehicle, and the distance is the length of a pipe. The subsequent pipe is hoisted and placed between the subsequent support vehicle and the secondary subsequent support vehicle, that is, both ends of the subsequent pipe are suspended at a certain height above the base. The current pipe and the subsequent pipe are docked through a heat shrink sleeve. After the docking is completed, the current support vehicle and the subsequent support vehicle release the current pipe and the subsequent pipe. At this time, both ends of the current pipe are docked. The current support vehicle and the subsequent support vehicle can be moved backwards, and then a new pipe is hoisted. This reciprocating process completes the docking operation.

[0029] In this embodiment, the pipes are all located at a certain height above the base when they are butted, so there is no need to dig the base, and naturally no need for backfilling and other operations. There is sufficient operating space for the installation of the heat shrink sleeve and the heat treatment with the flame gun, ensuring the efficiency and safety of the butt connection.

[0030] Reference Figure 1-Figure 5 When the three groups of support vehicles are used in a cycle, the current support vehicle and the subsequent support vehicle need to be moved backward. Since the subsequent support vehicle has been lying across the foundation pit and has lifted the end of the pipeline to be docked, the current support vehicle and the subsequent support vehicle need to bypass the subsequent support vehicle when moving backward. This embodiment temporarily locks the current support vehicle and the subsequent support vehicle into one piece through the following scheme, so that the current support vehicle and the subsequent support vehicle can cross the foundation pit. Specifically: a docking tube 23 is connected to one side of the top of the frame 4, and a docking shaft 24 is connected to the other side. A second guide frame 25 is connected to the docking shaft 24. A positioning rod 26 is slidably connected between the second guide frame 25. A latch 27 is connected to the bottom of the positioning rod 26. Pin holes are provided on the docking tube 23 and the docking shaft 24.

[0031] In the initial state, the pin 27 at the bottom of the positioning rod 26 of any support vehicle 1 is inserted into the pin hole of the docking tube 23. When the two groups of support vehicles need to be chained together, the positioning rod 26 of one support vehicle 1 is moved upward to disengage the pin 27 from the docking tube 23, and the docking shaft 24 of the other support vehicle 1 is pushed to snap into the docking tube 23. At this time, the pin holes on the docking shaft 24 and the docking tube 23 overlap, and the positioning rod 26 is released. The positioning rod 26 moves downward, and the pin 27 on it is simultaneously snapped into the pin holes on the docking tube 23 and the docking shaft 24, completing the temporary locking of the two groups of support vehicles 1 into the support vehicle group. At this time, the support vehicle group can be rotated, and the support vehicle group has wheels 3 supported on the foundation next to the foundation pit. When the support vehicle group rotates 90°, the center of gravity of the support vehicle group is always on the base, and the support vehicle group can be directly pulled across the foundation pit. Move the support vehicle group to the next docking position together and then unlock it. In this way, the cyclic docking operation of the pipeline can be completed by three groups of support vehicles.

[0032] This embodiment also uses the following technical solutions to redundantly reinforce the support vehicle group to ensure the strength of the support vehicle group to cross the foundation pit: a slot is provided on the chassis 2, and a plug rod 28 is slidably provided in the slot, and a lever 29 passing through the slot is connected to the plug rod 28; both the chassis 2 and the plug rod 28 are provided with sockets, and a locking rod 30 is provided at the socket.

[0033] When the supporting vehicle group is not formed, the insertion rod 28 is built into the slot on the chassis 2, and the locking rod 30 extends into the slot, which limits the locking rod 30 and prevents it from sliding out; when the supporting vehicle group needs to be temporarily locked, the locking rod 30 of one of the supporting vehicles 1 is removed, and the insertion rod 28 is pushed out of the slot by the force acting on the lever 29, and inserted into the slot of another supporting vehicle 1 until the chassis 2 and the insertion holes on the insertion rod 28 overlap, and then the locking rod 30 is inserted down into the insertion hole to achieve redundant locking of the supporting vehicle group. At this time, the top and bottom of the supporting vehicle group are connected as one, and the supporting vehicle group has sufficient strength to cross the foundation pit.

[0034] When the top of the support vehicle group is locked by the docking tube 23 and the docking shaft 24, the distance between the two support vehicles in the support vehicle group is fixed. In order to facilitate the smooth insertion of the bottom locking rod 30 into the insertion hole, the present embodiment is designed so that the insertion rod 28 of the support vehicle 1 is pushed out of the slot and inserted into the slot of the other support vehicle 1, and stops after abutting against the locking rod 30 of the other support vehicle 1. At this time, the chassis 2 of the support vehicle 1 and the insertion hole on the insertion rod 28 overlap. That is, after the upper part is locked, it is only necessary to push the bottom insertion rod 28 until it abuts against the locking rod 30 in the other support vehicle 1 to achieve the overlap of the chassis 2 and the insertion hole on the insertion rod 28, and at this time, the locking can be completed by inserting the locking rod 30 downward.

[0035] According to common sense, when installing the heat shrink sleeve, it is necessary to do the insertion positioning, put the heat shrink sleeve in the center of the interface, and overlap the pipe body on both sides by at least 100mm. The heat shrink sleeve is a standard part, so it is necessary to ensure that the interval between the two pipes before docking is constant. This embodiment sets a positioning component so that the lifting accuracy can be achieved when the pipe 10 is hoisted: the bottom of the frame 4 is provided with a avoidance groove 401, and a screw rod 32 is rotatably provided in the avoidance groove. The end of the screw rod 32 that passes through the avoidance groove is connected to a screw cap 33, and the screw rod 32 is threaded with an adjustment rod 34, and the adjustment rod 34 is provided with a positioning member 31.

[0036] When hoisting the pipe 10, the front support vehicle and the rear support vehicle are temporarily locked, and the distance between the two support vehicles is fixed. It is only necessary to adjust the position of the positioning member 31 once, and there is no need to adjust the position of the positioning member 31 thereafter. To adjust the position, by turning the screw cap 33, the screw rod 32 rotates and the adjustment rod 34 slides in the avoidance groove 401, so that the position of the positioning member 31 can be adjusted. When hoisting the pipe 10 (the rear pipe), it is only necessary to lower the pipe to the height of the bracket 9, and then translate it toward the positioning member 31 until the end of the pipe abuts against the positioning member 31 and stops. At this time, it is placed on the rear pipe to complete the hoisting positioning.

[0037] In this embodiment, in order to ensure the interchangeability of the support vehicles, that is, any two groups of support vehicles can be temporarily locked, the structure is symmetrical except for the temporary locking structure at the top. The positioning components are also provided with two groups symmetrical about the hanger 7 in the direction of the pipeline axis. When hoisting the pipeline, the length of the positioning member 31 needs to extend to the inside of the circle formed by the bracket 9, that is, the pipeline end face circle, in order to achieve the purpose of limiting the position of the pipeline. At this time, the other symmetrical positioning member 31 is on the route of the pipeline hoisting movement. This embodiment performs the avoidance operation through the following scheme: the positioning member 31 is slidably set on the adjustment rod 34, one end of the positioning member 31 is connected to the limiting cap 35, and the other end is connected to the stop circle 36. The positioning member 31 is provided with a second spring 37, and the two ends of the second spring 37 contact the adjustment rod 34 and the stop circle 36 respectively.

[0038] After the position of the adjusting rod 34 is adjusted, the pipe 10 is hoisted. When the pipe 10 is moved down to the height of the bracket 9, it first contacts the stop circle 36 away from the butt end, and the stop circle 36 is squeezed to make the positioning piece 31 retreat and avoid the position, and the second spring 37 is compressed, and then the pipe 10 is moved horizontally until it abuts against the stop circle 36 at the butt joint, and the hoisting positioning is completed; thereafter, the pipe 10 is lowered to the base, and the hanger 7 is lowered accordingly, but the stop circle 36 near the butt joint is stationary, and the stop circle 36 away from the butt joint will be separated from the pipe and reset.

[0039] The edge of the stop circle 36 is chamfered. When there are corrugations on the surface of the pipeline, the pipeline can be moved between the corrugations on the surface of the pipeline by the chamfered edges when the pipeline is hoisted and moved sideways horizontally.

[0040] The pipe docking device of the present invention can carry out cyclic docking of pipes in the foundation pit through three groups of support vehicles 1. Any two groups can suspend the two pipes to be docked in a certain space above the base. The two groups of support vehicles 1 are locked together through a redundant interlocking mechanism to achieve structural stability. Based on this, the one-time hoisting of the pipes in place can be assisted during hoisting to meet the size requirements of the heat shrink sleeve installation. At the same time, the two locked groups of support vehicles can rotate together and cross the foundation pit for easy movement. A pressure seat is set on the support vehicle. When hoisting the pipe, in the process of the pipe moving down, the linkage pressure seat moves to press tightly on the outer wall of the pipe, and the connecting support seat clamps the pipe to maintain the roundness of the pipe. At the same time, the two groups of support seats in the axial direction of the pipe maintain the straightness of the pipe. In this way, the pipe docking device of the present invention reserves sufficient operating space, no longer needs to excavate the base, improves the docking efficiency, and the overall device structure is simple, which meets the complexity requirements of the field construction environment of water conservancy projects.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pipe docking device for water conservancy projects, comprising at least three groups of support vehicles (1), wherein the support vehicles (1) comprise a chassis (2), the bottom of the chassis (2) is connected to wheels (3), and the chassis (2) is connected to a frame (4), characterized in that: A winch (5) is connected to the chassis (2), a fixed pulley (6) is connected to the top of the frame (4), a winding rope of the winch (5) passes around the fixed pulley (6) and is connected to a hanger (7), a symmetrical rack plate (8) is connected to the bottom of the hanger (7), and a bracket (9) is connected to the rack plate (8); a mounting seat (11) is connected to the bottom of the hanger (7), a double-axis motor (12) is provided on the mounting seat (11), a rotating shaft (13) is connected to the output shafts on both sides of the double-axis motor (12), a support ear (14) is connected to the bottom of the hanger (7), a gear (15) is rotatably connected to the support ear (14), the gear (15) is key-connected to the rotating shaft (13), and the gear (15) is meshed with the rack plate (8).

2. The pipe docking device according to claim 1, characterized in that: Two groups of brackets (9) of equal height are arranged in the axial direction of the pipeline (10).

3. The pipe docking device according to claim 2, characterized in that: A slide plate (17) is slidably arranged at the bottom of the hanger (7), and the end of the slide plate (17) is connected to a pressure seat (16). The pressure seat (16) and the support seat (9) are arc plates adapted to the pipe (10). The end of the slide plate (17) different from the pressure seat is connected to an end plate (18). A positioning shaft (19) is connected between the end plate (18) and the hanger (7). A first spring (20) is sleeved on the positioning shaft (19), and the two ends of the first spring (20) are in contact with the end plate (18) and the hanger (7) respectively. A guide frame (21) is connected to the frame (4), and a guide groove is provided on the guide frame (21), and the guide groove includes a connected oblique groove (211) and a vertical groove (212). A sliding column (22) is connected to the side of the end plate (18), and the sliding column (22) is located in the guide groove.

4. The pipe docking device according to claim 3, characterized in that: One side of the top of the vehicle frame (4) is connected to a docking tube (23), and the other side is connected to a docking shaft (24); a second guide frame (25) is connected to the docking shaft (24); a positioning rod (26) is slidably connected between the second guide frames (25); a latch pin (27) is connected to the bottom of the positioning rod (26); and pin holes are provided on the docking tube (23) and the docking shaft (24).

5. The pipe docking device according to claim 4, characterized in that: The chassis (2) is provided with a slot, an insertion rod (28) is slidably provided in the slot, and a lever (29) is connected to the insertion rod (28) and passes through the slot; both the chassis (2) and the insertion rod (28) are provided with insertion holes, and a locking rod (30) is provided at the insertion hole.

6. The pipe docking device according to claim 1, characterized in that: The insertion rod (28) of the support vehicle (1) is pushed out of the slot and inserted into the slot of another support vehicle (1). When the insertion rod (28) stops after abutting against the locking rod (30) of the other support vehicle (1), the chassis (2) of the support vehicle (1) and the insertion hole on the insertion rod (28) overlap.

7. The pipe docking device according to claim 5, characterized in that: The vehicle also includes a positioning component, wherein a positioning groove (401) is provided at the bottom of the vehicle frame (4), and the positioning component includes a screw rod (32) rotatably provided in the positioning groove, one end of the screw rod (32) passing through the positioning groove is connected to a screw cap (33), an adjusting rod (34) is threadedly engaged on the screw rod (32), and a positioning member (31) is provided on the adjusting rod (34).

8. The pipe docking device according to claim 7, characterized in that: The positioning component is provided with two groups symmetrical about the hanger (7) in the direction of the pipeline axis, and the positioning member (31) is slidably arranged on the adjustment rod (34), one end of the positioning member (31) is connected to a limiting cap (35), and the other end is connected to a stop circle (36), and a second spring (37) is provided on the positioning member (31), and the two ends of the second spring (37) respectively contact the adjustment rod (34) and the stop circle (36).

9. The pipe docking device according to claim 8, characterized in that: The edge of the stop circle (36) is rounded.

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