A device for trenchless rehabilitation of a buried drain

Abstract

The utility model provides a buried drainage pipe non - excavation repair device, including a plurality of PE pipes and a plurality of pull rods, still including first foundation pit and second foundation pit, be equipped with winch in first foundation pit, the traction rope of winch passes through the operation of drawing pipe head and flange traction PE pipe, in the gap of winch every time traction spliced PE pipe passing action, the next PE pipe of the next pull rod is assembled in second foundation pit, after assembling, the tail end of pull rod is stretched out by the rear end of PE pipe, and the push disc and the pusher are sequentially detachably arranged on the pull rod, and the pusher moves forward by the push disc and makes it and the spliced PE pipe socket joint. The utility model is convenient for construction, convenient for dismounting, realizes the quick repair operation of drainage pipe under the non - excavation state, improves the speed and efficiency of the repair construction of drainage pipe.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline construction, and in particular relates to a trenchless repair device for buried drainage pipes. Background Technology

[0002] Trenchless technology is an extremely important construction method for laying pipelines in urban areas. For buried concrete drainage pipes in towns, since most drainage pipes are located in areas with heavy traffic, sensitive environments, and limited construction space, trenchless repair technology is the preferred choice once the drainage pipes are damaged.

[0003] Currently, most trenchless repair equipment for drainage pipelines has a complex structure, which makes it inconvenient to assemble and install PE pipes for drainage pipeline repair, causing inconvenience to trenchless repair construction and affecting construction efficiency. Utility Model Content

[0004] In view of this, the present invention aims to provide a trenchless repair device for buried drainage pipes, so as to quickly repair damaged drainage pipes under trenchless conditions.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A trenchless repair device for buried drainage pipes includes:

[0007] The drainage pipe repair requires several PE pipes and several tie rods. The PE pipes can be sequentially assembled using a socket joint, and the tie rods can be sequentially and detachably assembled. The total length of the assembled tie rods is greater than the total length of the assembled PE pipes. It also includes:

[0008] The first and second foundation pits are located at opposite ends of the drainage pipe. A winch is installed in the first foundation pit, with a pipe-pulling head attached to the winch's traction rope. The pipe-pulling head connects to the assembled PE pipe and the assembled tie rod via a flange. The tie rod passes through the center of the PE pipe. During the interval between each time the winch pulls the assembled PE pipe through the pipe, the next PE pipe and the next tie rod are assembled in the second foundation pit. After assembly, the tail end of the tie rod extends from the rear end of the PE pipe. A push plate and a pusher are detachably installed sequentially on the tie rod. The push plate is aligned with the next PE pipe, and the pusher pushes the next PE pipe forward through the push plate to connect it with the previously assembled PE pipe.

[0009] Furthermore, the two adjacent tie rods are threaded together; the flange and the first tie rod are threaded together.

[0010] Furthermore, a limiting annular groove is opened on the outer surface of one end of the first PE pipe, and a socket annular groove is opened on the outer surface of the other end of the pipe. Sockets are opened on the inner surface of one end of all the remaining PE pipes, and socket annular grooves corresponding to the sockets are opened on the outer surface of the other end of the pipe.

[0011] During assembly, the socket groove of the front PE pipe is connected to the socket of the adjacent PE pipe at the rear.

[0012] The flange diameter is the same as the outer diameter of the PE pipe. Several locking blocks are protruding from the flange end face corresponding to the limiting ring groove of the first PE pipe and the push plate end face corresponding to the socket ring groove of the PE pipe. The locking blocks on the flange wrap around the limiting ring groove of the first PE pipe. A through hole is provided at the center of the push plate. The pull rod and the through hole are fitted with a gap. The locking blocks on the push plate wrap around the socket ring groove of the corresponding PE pipe.

[0013] Furthermore, the pusher includes two fixed plates facing each other, with slots on the two fixed plates facing downwards that correspond to the pull rod. The slots pass through the center of the fixed plates, and the pusher is inserted into the pull rod through the slots. The two fixed plates are connected by two hydraulic cylinders symmetrically arranged on both sides of the slots, and the hydraulic cylinders are set below the center of the fixed plates.

[0014] The pull rod has several axially evenly spaced limiting holes, and the pusher is matched with a limiting rod. The limiting rod is inserted into a limiting hole adjacent to the rear end of the pusher, and the limiting rod limits the backward movement of the pusher.

[0015] Furthermore, each of the two fixed plates has a planar structure at its bottom, and the planar structures of the two fixed plates are located in the same horizontal plane.

[0016] Furthermore, the tie rod and the PE pipe are of equal length.

[0017] Compared with existing technologies, the trenchless repair device for buried drainage pipes described in this utility model has the following advantages:

[0018] (1) This utility model is easy to construct and easy to disassemble. The corresponding drainage pipe to be repaired is equipped with several PE pipes and several tie rods. The PE pipes and tie rods are assembled separately using the stepping gap of the winch. The PE pipe is pushed forward by the pusher so that it is connected to the PE pipe adjacent to it. Then the pusher maintains the top pressure state and the winch pulls the pipe to perform the pipe-threading operation, so as to realize the rapid repair operation of the drainage pipe in the unexcavated state and improve the speed and efficiency of the drainage pipe repair construction.

[0019] (2) In this utility model, the setting of the clamping block on the flange and push plate can center the PE pipe, so that the two PE pipes can be quickly connected by socketing, thereby improving the construction speed. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0021] Figure 1 This is a schematic diagram of a trenchless repair device for buried drainage pipes according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the tie rod structure in this embodiment;

[0023] Figure 3 This is a schematic diagram of the first PE pipe structure in this embodiment;

[0024] Figure 4 This is a schematic diagram of the PE pipe structure in this embodiment;

[0025] Figure 5 This is a schematic diagram of the flange structure in this embodiment;

[0026] Figure 6 This is a schematic diagram of the pusher structure in this embodiment;

[0027] Figure 7 This is a schematic diagram of the pusher structure in this embodiment;

[0028] Figure 8 This is a flowchart of the trenchless repair construction process for drainage pipes.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-Drainage pipe; 2-Pipe pull head; 3-Flange; 4-PE pipe; 41-Socket groove; 42-Socket opening; 43-Limiting groove; 431-Conical structure; 5-Pull rod; 51-Limiting hole; 52-External thread; 53-Threaded hole; 6-Pusher; 61-Fixing plate; 62-Card slot; 63-Hydraulic cylinder; 64-Holding rod; 65-Planar structure; 7-Limiting rod; 8-Push plate; 9-Traction rope; 10-Winder; 11-Mounting block; 12-Through hole; 13-Boss; 14-First pit; 15-Second pit. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] like Figure 1As shown, a trenchless repair device for buried drainage pipes includes several PE pipes 4 and several tie rods 5 for repairing the drainage pipe 1. Preferably, the outer diameter of the PE pipes 4 is equal to the inner diameter of the drainage pipe 1, or the outer diameter of the PE pipe is slightly smaller than the inner diameter of the drainage pipe 1; the length of the tie rods 5 is the same as the length of the PE pipes 4, and the number of tie rods 5 is greater than the number of PE pipes 4. The several PE pipes 4 can be sequentially assembled by insertion and insertion, and the several tie rods 5 can be sequentially and detachably assembled, and the total length of the assembled tie rods 5 is greater than the total length of the assembled PE pipes 4. It also includes a first foundation pit 14 and a second foundation pit 15, which are located at both ends of the drainage pipe 1. The second foundation pit 15 is an assembly pit used for assembling the tie rod 5 and the PE pipe. The first foundation pit 1 is a traction pit, which is equipped with a winch 10. The winch 10 is used to pull the assembled PE pipe in the second foundation pit 15 so that the assembled PE pipe is inserted into the drainage pipe and the PE pipe insertion operation is realized.

[0033] Specifically, the winch 10 has a pull head 2 on its traction rope 9. The pull head 2 is spot-welded or screwed to a flange 3. The outer diameter of the flange 3 is the same as that of the PE pipe 4. The flange 3 and the assembled PE pipe 4 are detachably connected. The assembled pull rod 5 passes through the center of the PE pipe 4 and is installed at the center of the flange 3. During the interval between each PE pipe pulling action of the winch 10, that is, between two adjacent traction actions of the winch 10, the next PE pipe 4 and the next tie rod 5 are assembled in the second pit 15. This allows for the assembly of several PE pipes within the limited working space of the second pit 15. In other words, during this interval, the next PE pipe 4 is first fitted onto the assembled tie rod 5, and then the next tie rod 5 is assembled at the rear end of the already assembled tie rod 5 to complete the assembly of the next tie rod 5. This assembly method ensures that the number of tie rods after assembly is always one more than the number of PE pipes after assembly, guaranteeing that there will always be a tie rod 5 extending out of the PE pipe, which facilitates the installation of the jack and the jacking operation of the jack. The pull rod 5 is sequentially and detachably equipped with a push plate 8 and a pusher 6. The push plate 8 is directly facing the next PE pipe 4. The pusher 6 pushes the push plate 8, and the push plate 8 pushes the next PE pipe 4 forward so that it can be connected to the already assembled previous PE pipe, thus realizing the assembly of the next PE pipe.

[0034] The structure of the pull rod 5 is as follows Figure 2 As shown, one end of the rod has an external threaded portion 52, and the other end has a threaded hole 53. The threaded hole 53 and the external threaded portion 52 are adapted to each other. Several limiting holes 51 are evenly opened in the axial direction of the rod. During assembly, the external threaded portion 52 of the rod 5 faces forward and the threaded hole 53 faces backward. The external threaded portion 52 of the rear rod 5 is screwed into the threaded hole 53 of the front rod 5 to make the two rods 5 threadedly connected, thereby realizing the detachable connection of the two rods.

[0035] The first PE pipe 4 structure is as follows Figure 3 As shown, a limiting annular groove 43 is formed on the outer surface of one end of the pipe wall, and a socket annular groove 41 is formed on the outer surface of the other end of the pipe wall. All other PE pipes 4 have the same structure. Figure 4 As shown, one end of the remaining PE pipe 4 has a socket 42 on its inner surface, and the other end has a corresponding socket groove 41 on its outer surface. When assembling two PE pipes, refer to... Figure 1 The socket groove 41 of the front PE pipe 4 and the socket 42 of the adjacent rear PE pipe 4 are connected to each other, realizing a detachable connection between the two PE pipes. To improve the sealing effect of the socket connection between the two PE pipes, the socket groove 41 and the corresponding socket 42 are assembled with an interference fit or a small clearance fit. To facilitate the socket connection between the socket groove 41 and the corresponding socket 42, a guide cone surface is provided at the outermost end of the socket groove 41. Before assembling the two PE pipes, the socket 42 of the rear PE pipe D is first inserted into the guide cone surface of the front PE pipe to position the rear PE pipe. When the pusher pushes, the guide cone surface has a guiding function, which enables the socket groove 41 and the socket 42 to be quickly connected.

[0036] Flange 3 structure as follows Figure 5 As shown, a boss 13 is provided at the center of flange 3 corresponding to tie rod 5, and threaded holes are provided on the boss 13. At the same time, several clamping blocks 11 are provided at the edge of flange 3 corresponding to the limiting annular groove 43 of the first PE pipe 4, and the clamping blocks 11 are evenly distributed along the edge of flange 3. During construction, refer to Figure 1 The external thread 52 of the first tie rod 5 is screwed into the threaded hole of the boss 13, realizing a detachable connection between the tie rod 5 and the flange. After the first PE pipe 4 is fitted over the first tie rod, the limiting ring groove 43 of the first PE pipe is inserted between several clamping blocks 11. The clamping blocks 11 surround the limiting ring groove 43, which centers the PE pipe and makes the first PE pipe and the flange 3 concentric, while also ensuring that the tie rod 5 and the first PE pipe are coaxial. It should be noted that, in order to facilitate the insertion of the limiting ring groove 43 between the clamping blocks 11, a conical structure 431 is provided at the front end of the limiting ring groove 43 to facilitate the insertion of the limiting ring groove 43 into the clamping blocks 11.

[0037] Push plate 8 structure as Figure 6 As shown, the socket groove 41 of the corresponding PE pipe 4 on its end face is also provided with several locking blocks 11 protruding. The locking blocks 11 on the push plate 8 are evenly arranged in the circumferential direction. The center of the push plate 8 is provided with a through hole 12 corresponding to the pull rod 5. The pull rod 5 and the through hole 12 are fitted with a gap. The locking blocks 11 on the push plate 8 wrap the socket groove 41 of the corresponding PE pipe 4 inside and center the PE pipe 4, so that the PE pipe and the pull rod 5 are coaxial, so as to realize the two PE pipes are inserted face to face.

[0038] The structure of the pusher 6 is as follows Figure 7As shown, it includes two opposing fixed plates 61. Each fixed plate 61 has a downward-facing slot 62 corresponding to the pull rod 5. The slot 62 passes through the center of the fixed plate 61. The pusher 6 is inserted into the pull rod 5 through the slot 62. The two fixed plates 61 are connected by two hydraulic cylinders 63 symmetrically arranged on both sides of the slot 62. The hydraulic cylinders 63 are positioned below the center of the fixed plates 61. This structure ensures a stable mounting state between the pusher 6 and the pull rod 5, enabling the pusher to perform stable pressing operations. To facilitate the stable placement of the pusher 6 on the ground or workbench, each of the two fixed plates 61 has a planar structure 65 at its bottom, and the planar structures 65 of the two fixed plates 61 are located on the same horizontal plane.

[0039] The pusher 6 is matched with a limiting rod 7, which is inserted into a limiting hole 51 immediately adjacent to the rear end of the pusher 6. The limiting rod 7 limits the backward movement of the pusher 6.

[0040] The above describes an embodiment of the trenchless repair device for drainage pipes. The following describes the trenchless repair method for drainage pipes using this device:

[0041] A trenchless drainage pipe repair method, the construction process is as follows: Figure 8 As shown, it includes the following steps:

[0042] S10. Excavation of the foundation pit and installation of auxiliary equipment:

[0043] Cut off the water flow upstream of the drainage pipe to prevent water from flowing into the drainage pipe 1 to be repaired. Excavate a first pit 14 at one end of the drainage pipe 1 to be repaired and a second pit 15 at the other end. Clean the inside of the drainage pipe 1. Install a winch 10 in the first pit 14. Install a pipe joint 2 on the traction rope 9 of the winch 10. Set a flange 3 on the pipe joint 2. Set up hoisting equipment outside the second pit 15 to hoist the PE pipe for repairing the drainage pipe into the second pit 15.

[0044] S20, Installation of the first PE pipe:

[0045] Inside the second pit 15, the first tie rod 5 is detachably installed at the center of the flange 3. The first PE pipe 4 is placed on the outside of the first tie rod 5 with its limiting annular groove 43 facing forward and its socket annular groove 41 facing backward. The limiting annular groove 43 is inserted into several clamping blocks 11 of the flange 3. The clamping blocks 11 wrap around the limiting annular groove 43. Then, the second tie rod 5 is assembled at the rear end of the first tie rod 5.

[0046] The push plate 8 is mounted on the assembled pull rod 5, and the several locking blocks 11 of the push plate 8 wrap around the socket groove 41 of the first PE pipe.

[0047] Installation of S30 and jacking device 6:

[0048] The pusher 6 is inserted into the second pull rod 5 through the slot 62. After installation, the push rod of the hydraulic cylinder 63 of the pusher 6 faces the push plate 8. The limit rod 7 is inserted into the limit hole 51 set on the second pull rod 5, which is close to the rear end of the pusher 6. The limit rod 7 limits the pusher 6 to move backward.

[0049] S40, First PE pipe installation:

[0050] When the pusher 6 is activated, the push rod of its hydraulic cylinder 63 extends out of the pusher plate 8, and the first PE pipe 4 is clamped and fixed by the pusher plate 8 and the flange 3. The pusher 6 maintains this pressing state, and the winch 10 is activated to pull the first PE pipe 4 to move into the drain pipe 1 by a set length distance. After the movement, the rear end of the first PE pipe 4 should still be outside the drain pipe 1.

[0051] After the first PE pipe 4 is installed, remove the push plate 8, the pusher 6 and the limit rod 7;

[0052] S50, the assembly of the next PE pipe:

[0053] Place the next PE pipe 4 onto the assembled tie rod 5 with the socket 42 facing forward and the socket groove 41 facing backward, and make the socket 42 of the next PE pipe 4 directly opposite the socket groove 41 of the PE pipe that has been inserted into the drainage pipe.

[0054] Assemble the next tie rod 5 at the rear end of the assembled tie rod 5, and then install the push plate 8, the pusher 6 and the limit rod 7 in sequence on the assembled tie rod, and ensure that the several clamping blocks 11 of the push plate 8 can wrap the socket ring groove 41 of the next PE pipe 4, and the push rod of the pusher 6 is facing the push plate 8.

[0055] When the pusher 6 is activated, the push rod of its hydraulic cylinder 63 extends out to push the push plate 8. The push plate 8 pushes the next PE pipe 4 forward until its socket 42 is connected to the socket ring groove 41 of the PE pipe that has been inserted into the drain pipe, thus completing the assembly of the next PE pipe and the previous PE pipe.

[0056] S60, Installation of assembled PE pipes:

[0057] The pusher 6 maintains its pressing state, and the winch 10 operates again, pulling the assembled PE pipe 4 to move into the drain pipe 1 by a set length distance, and after the movement, the rear end of the next PE pipe 4 is located outside the drain pipe 1.

[0058] After the assembled PE pipe is installed, remove the push plate 8, the pusher 6, and the limit rod 7.

[0059] S70. Repeat steps S50 and S60 to complete the repair of the drain pipe:

[0060] Repeat steps S50 and S60 to sequentially assemble several PE pipes for repairing drainage pipe 1 and thread the assembled PE pipes through the pipe. At this point, the front end of the first PE pipe is exposed from the first foundation pit 14, completing the repair of the drainage pipe in the non-excavation state.

[0061] Preferably, in step S10, the bottom wall of the drainage pipe 1 is retained when the second foundation pit 15 is excavated, or two guide rails are set in the corresponding drainage pipe 1 in the second foundation pit 15 to temporarily support the PE pipe and guide its traction movement when assembling the PE pipe.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A trenchless repair device for buried drainage pipes, characterized in that: include: The drainage pipe (1) is repaired using several PE pipes (4) and several tie rods (5). The several PE pipes (4) can be sequentially assembled by insertion and insertion, and the several tie rods (5) can be sequentially and detachably assembled. The total length of the assembled tie rods (5) is greater than the total length of the assembled PE pipes (4). It also includes: The first foundation pit (14) and the second foundation pit (15) are located at opposite ends of the drainage pipe (1). A winch (10) is installed in the first foundation pit (14). A pipe-pulling head (2) is installed on the traction rope (9) of the winch (10). The pipe-pulling head (2) is connected to the assembled PE pipe (4) and the assembled tie rod (5) through a flange (3). The tie rod (5) passes through the center of the PE pipe (4). The winch (10) pulls the assembled PE pipe each time. During the gap in the E-pipe insertion process, the next PE pipe (4) and the next tie rod (5) are assembled in the second pit (15). After assembly, the tail end of the tie rod (5) extends from the rear end of the PE pipe (4). The tie rod (5) is sequentially and detachably equipped with a push plate (8) and a pusher (6). The push plate (8) is directly facing the next PE pipe (4). The pusher (6) pushes the next PE pipe (4) forward through the push plate (8) so that it can be connected to the PE pipe that has been assembled in front.

2. The trenchless repair device for buried drainage pipes according to claim 1, characterized in that: The two adjacent tie rods (5) are threaded together; the flange (3) and the first tie rod (5) are threaded together.

3. The trenchless repair device for buried drainage pipes according to claim 1, characterized in that: The first PE pipe (4) has a limiting ring groove (43) on the outer surface of one end of the pipe wall and a socket ring groove (41) on the outer surface of the other end of the pipe wall. All other PE pipes (4) have a socket (42) on the inner surface of one end of the pipe wall and a socket ring groove (41) corresponding to the socket (42) on the outer surface of the other end of the pipe wall. During assembly, the socket groove (41) of the front PE pipe (4) and the socket (42) of the adjacent PE pipe (4) are connected by a socket; The flange (3) has the same diameter as the outer diameter of the PE pipe (4). The flange (3) end face corresponding to the limiting ring groove (43) of the first PE pipe and the push plate (8) end face corresponding to the socket ring groove (41) of the PE pipe (4) are respectively provided with several clamping blocks (11). The clamping blocks (11) on the flange (3) wrap around the limiting ring groove (43) of the first PE pipe (4). A through hole (12) is provided at the center of the push plate (8). The pull rod (5) and the through hole (12) are fitted with a gap. The clamping blocks (11) on the push plate (8) wrap around the socket ring groove (41) of the corresponding PE pipe (4).

4. The trenchless repair device for buried drainage pipes according to claim 1, characterized in that: The pusher (6) includes two fixed plates (61) facing each other. The two fixed plates (61) are respectively provided with slots (62) corresponding to the pull rod (5) facing downwards. The slots (62) pass through the center of the fixed plates (61). The pusher (6) is inserted into the pull rod (5) through the slots (62). The two fixed plates (61) are connected by two hydraulic cylinders (63) symmetrically arranged on both sides of the slots (62). The hydraulic cylinders (63) are set below the center of the fixed plates (61). The pull rod (5) has several axially evenly opened limiting holes (51), and the pusher (6) is matched with a limiting rod (7). The limiting rod (7) is inserted into a limiting hole (51) adjacent to the rear end of the pusher (6), and the limiting rod (7) limits the pusher (6) from moving backward.

5. The trenchless repair device for buried drainage pipes according to claim 4, characterized in that: The bottom of each of the two fixed disks (61) is provided with a planar structure (65), and the planar structures (65) of the two fixed disks (61) are located in the same horizontal plane.

6. The trenchless repair device for buried drainage pipes according to claim 4, characterized in that: The tie rod (5) and the PE pipe are of equal length.

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