CN215060430U

CN215060430U - Local prosthetic devices of non-excavation pipeline

Info

Publication number: CN215060430U
Application number: CN202120807470.4U
Authority: CN
Inventors: 徐炜
Original assignee: Shanghai Xinli Ecological Environment Engineering Co ltd
Current assignee: Shanghai Xinli Ecological Environment Engineering Co ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-12-07
Anticipated expiration: 2031-04-19

Abstract

The application relates to a local repairing device for a non-excavation pipeline, belonging to the technical field of pipeline repairing, which comprises a shell, a repair mechanism arranged in the shell, and a supporting and positioning mechanism arranged on the shell, a rotating disc is rotatably arranged in the shell, the repairing mechanism comprises a fixed rod fixed on the rotating disc, a fixed seat fixedly sleeved on the fixed rod, a movable seat slidably sleeved on the fixed rod and a mounting rack arranged between the fixed seat and the movable seat, connecting rods are hinged among the mounting rack, the fixed seat and the movable seat, an arc-shaped plate is fixed on the mounting rack, the curvature radius of arc is less than the curvature radius of waiting to restore the pipeline, be provided with in the casing and be used for promoting remove the seat along the drive assembly that the dead lever removed, be provided with in the casing and be used for the drive rolling disc pivoted slewing mechanism. This application has the repair range who enlarges prosthetic devices, the effect of accurate restoration pipeline.

Description

Local prosthetic devices of non-excavation pipeline

Technical Field

The application relates to the technical field of pipeline repair, in particular to a local repair device for a non-excavation pipeline.

Background

The underground water pipes are mostly metal pipes, when the ground collapses, the soil extrudes the pipes to easily cause the collapse of the pipes, thereby influencing the flow of water flow in the pipes. In order to quickly repair a collapsed pipeline without affecting the traffic at the collapsed site, operators often utilize trenchless repair devices to repair the collapsed site of the pipeline.

Among the related art, chinese utility model patent that publication number is CN210647858U discloses a drainage pipe non-excavation formula prosthetic devices, which comprises a bod, the inboard bottom central authorities of organism are provided with first pneumatic cylinder, the piston rod bottom of first pneumatic cylinder is connected with down and repairs the board, the top fixed mounting of organism has the box, the inside central authorities of box are equipped with the motor, motor output shaft has cup jointed the driving gear, the driving gear top is equipped with first driven rack, first driven rack one end is connected with the head rod, the head rod end fixing has first restoration curb plate, the driving gear below is equipped with the driven rack of second, the driven rack one end of second is connected with the second connecting rod, second connecting rod end fixing has the second to repair the curb plate, the box top is fixed with the second pneumatic cylinder, the top of second pneumatic cylinder is connected with the second connecting rod, repair the board on the top of second connecting rod is installed.

In view of the above-mentioned related technologies, the inventor believes that when the machine body enters the pipeline, the repairing device can only extrude the inner side walls of the pipeline in the upper, lower, left and right directions of the machine body, and if the collapse position of the pipeline is large or the collapse position of the pipeline is not in the four directions of the machine body, the repairing device is difficult to completely repair the pipeline, and there is a defect that the repairing range of the repairing device is small.

SUMMERY OF THE UTILITY MODEL

In order to enlarge the repair range of the repair device and accurately repair the pipeline, the application provides a local repair device for the trenchless pipeline.

The application provides a local prosthetic devices of non-excavation pipeline adopts following technical scheme:

a local repairing device for a trenchless pipeline comprises a shell, a repairing mechanism arranged in the shell, a supporting and positioning mechanism arranged on the shell and used for fixing the position of the shell, a rotating disc is rotatably arranged in the shell, the repairing mechanism comprises a fixed rod fixed on the rotating disc, a fixed seat fixedly sleeved on the fixed rod, a movable seat slidably sleeved on the fixed rod and a mounting rack arranged between the fixed seat and the movable seat, connecting rods are hinged among the mounting rack, the fixed seat and the movable seat, an arc-shaped plate is fixed on the mounting rack, the curvature radius of arc is less than the curvature radius of waiting to restore the pipeline, be provided with in the casing and be used for promoting remove the seat along the drive assembly that the dead lever removed, be provided with in the casing and be used for the drive rolling disc pivoted slewing mechanism.

Through adopting above-mentioned technical scheme, operating personnel puts into prosthetic devices and treats in the restoration pipeline, and when prosthetic devices reachd and treats the restoration department, operating personnel utilized the position of the fixed casing of support positioning mechanism, and operating personnel utilizes slewing mechanism to make the rolling disc rotate, and the rolling disc rotates and makes the dead lever rotate, and the dead lever rotates and makes fixing base and removal seat rotate, finally makes the arc rotate to just the department of collapsing of pipeline. Operating personnel starts drive assembly, and drive assembly makes the removal seat remove to the fixing base, removes the distance reduction between seat and the fixing base, and the mounting bracket removes to the direction of keeping away from the dead lever, and the mounting bracket promotes the arc and treats the inside wall butt of restoreing the pipeline to the arc is restoreed the department of collapsing, and slewing mechanism's being provided with does benefit to the restoration scope that enlarges prosthetic devices, makes things convenient for operating personnel to carry out the accuracy restoration to the department of collapsing.

Preferably, the rotating mechanism comprises a motor arranged in the shell, a driving gear fixedly sleeved on the output shaft of the motor, a positioning rod fixed on the rotating disc, and a driven gear fixedly sleeved on the connecting rod, and the driving gear is meshed with the driven gear.

Through adopting above-mentioned technical scheme, operating personnel starter motor, the output shaft of motor rotates and drives the driving gear and rotate, and the driving gear rotates and drives driven gear and rotate, and driven gear rotates and drives the locating lever and rotate, and the locating lever rotates and drives the rolling disc and rotate.

Preferably, the fixing seat is provided with a driving assembly, the driving assembly comprises an air cylinder installed on the rotating disc, a pushing pipe which is sleeved on the fixing rod in a sliding manner and is fixedly connected with the moving seat, and a fixing plate fixed on the pushing pipe, and the fixing plate is fixedly connected with a piston rod of the air cylinder.

Through adopting above-mentioned technical scheme, operating personnel starts the cylinder, and the piston rod of cylinder promotes the fixed plate and removes, and the fixed plate removes and drives the removal of propelling movement pipe, and the removal of propelling movement pipe makes the removal post remove along the dead lever.

Preferably, the dead lever is provided with a guide groove, the inner side wall of the movable seat is fixed with a guide block, and the guide block is arranged in the guide groove and is in sliding fit with the inner side wall of the guide groove.

Through adopting above-mentioned technical scheme, being provided with of guide way and guide block does benefit to the enhancement and removes being connected between seat and the dead lever, and the setting up of guide way provides the guide effect for the guide block, and further prevents to remove the seat and rotate.

Preferably, be fixed with the spliced pole on the arc, set up on the mounting bracket be used for with spliced pole grafting complex slot, wear to be equipped with the locating pin on the mounting bracket, the locating pin pass the mounting bracket and with spliced pole screw-thread fit.

Through adopting above-mentioned technical scheme, the setting up of locating pin and connecting column makes the arc can dismantle with the mounting bracket and be connected to make things convenient for operating personnel to change different curvature radius's arc, be favorable to improving prosthetic devices's suitability.

Preferably, a supporting column is fixed on the inner side wall of the shell, the supporting column is rotatably connected with the fixed rod through a bearing, and an inner ring of the bearing is fixedly connected with the fixed rod.

Through adopting above-mentioned technical scheme, setting up of support column provides the supporting role for the dead lever, and the bearing makes the rotation of dead lever more smooth and easy to the setting.

Preferably, the supporting and positioning mechanism comprises an electric pushing cylinder arranged on the shell and a supporting block fixed on a piston rod of the electric pushing cylinder, the supporting and positioning mechanism is provided with a plurality of groups, and the supporting and positioning mechanism surrounds the shell and is uniformly arranged.

Through adopting above-mentioned technical scheme, operating personnel starts multiunit electronic pushing cylinder simultaneously, and the piston rod that electronic pushing cylinder promotes to support tight piece and support the inside wall of waiting to restore the pipeline to fixed prosthetic devices's position improves prosthetic devices's stability.

Preferably, be provided with a plurality of pulleys on the casing, the pulley with be provided with coupling assembling between the casing, coupling assembling is including being fixed in fixed sleeve on the casing, wear to locate in the fixed sleeve and with the fixed sleeve inside wall slides the complex and removes the post, set up in the casing with spring between the pulley, remove the post with pulley fixed connection, the spring housing is located on the fixed sleeve.

Through adopting above-mentioned technical scheme, the setting of slider makes things convenient for prosthetic devices's removal, and operating personnel will remove the post and press into fixed sleeve, and at this moment, the spring is in compression state, puts into the pulley waiting to restore the pipeline when operating personnel, and the pulley supports the inside wall that tightly waits to restore the pipeline under the spring action of spring, and fixed sleeve, removal post and spring set up and make things convenient for the pulley to use in the pipeline of different internal diameters.

In summary, the present application includes at least one of the following beneficial technical effects:

the arrangement of the supporting and positioning mechanism is favorable for fixing the position of the repairing device, an operator starts the driving assembly, the driving assembly enables the movable seat to move towards the fixed seat, the distance between the movable seat and the fixed seat is reduced, the mounting frame moves towards the direction far away from the fixed rod, the mounting frame pushes the arc plate to abut against the inner side wall of the pipeline to be repaired, so that the collapse position is repaired by the arc plate, the arrangement of the rotating mechanism enables the repairing mechanism to rotate, the repairing range of the repairing device is favorably expanded, and the operator can conveniently and accurately repair the collapse position;

the arrangement of the positioning pin and the connecting column enables the arc-shaped plate to be detachably connected with the mounting frame, so that operators can conveniently replace the arc-shaped plates with different curvature radiuses, and the improvement of the applicability of the repairing device is facilitated;

the sliding block is convenient to move the repairing device, and the fixed sleeve, the movable column and the spring are convenient to use the pulley in pipelines with different inner diameters.

Drawings

Fig. 1 is a schematic structural diagram of a local trenchless pipeline repairing apparatus according to an embodiment of the present application.

Fig. 2 is a schematic view of the internal structure of the trenchless pipeline local repairing apparatus according to the embodiment of the present application.

Description of reference numerals: 1. a housing; 11. mounting a column; 111. a connecting ring; 12. a pulley; 13. rotating the disc; 14. a support pillar; 2. a repair mechanism; 21. fixing the rod; 211. a guide groove; 22. a fixed seat; 23. a movable seat; 231. a guide block; 24. a mounting frame; 241. a connecting rod; 242. positioning pins; 243. a slot; 25. an arc-shaped plate; 251. connecting columns; 3. a rotating mechanism; 31. a motor; 32. a driving gear; 33. positioning a rod; 34. a driven gear; 4. a supporting and positioning mechanism; 41. an electric pushing cylinder; 42. a propping block; 5. a connecting assembly; 51. fixing the sleeve; 52. moving the column; 53. a spring; 6. a drive assembly; 61. a cylinder; 62. pushing the pipe; 63. and (7) fixing the plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses local prosthetic devices of non-excavation pipeline. Referring to fig. 1 and 2, the trenchless pipeline local repairing device comprises a shell 1, a repairing mechanism 2, a rotating mechanism 3 and a supporting and positioning mechanism 4.

Referring to fig. 1 and 2, the housing 1 is a hollow cylinder, the mounting post 11 is fixed to an end surface of one end of the housing 1, the mounting post 11 is cylindrical, and an axis of the mounting post 11 coincides with an axis of the housing 1. The supporting and positioning mechanism 4 includes an electric pushing cylinder 41 and a supporting block 42, and one end of the electric pushing cylinder 41 far away from the piston rod is fixedly connected with the outer peripheral surface of the mounting post 11. The abutting block 42 is arc-shaped plate-shaped, the curvature radius of the abutting block 42 is smaller than the curvature inner diameter of the pipeline to be repaired, the abutting block 42 is fixed on the piston rod of the electric pushing cylinder 41, and the other end, far away from the electric pushing cylinder 41, of the abutting block 42 abuts against the inner side wall of the pipeline to be repaired. The electric push cylinders 41 are provided in three, and the three electric push cylinders 41 are uniformly arranged around the axis of the mounting column 11.

Referring to fig. 1 and 2, a pulley 12 is disposed on a housing 1, a connection assembly 5 is disposed between the pulley 12 and the housing 1, the connection assembly 5 includes a fixing sleeve 51, a moving column 52 and a spring 53, the fixing sleeve 51 is in a circular cylinder shape, one end of the fixing sleeve 51 is open, and the other end of the fixing sleeve 51 is closed. The closed end of the fixed sleeve 51 is fixedly connected with the outer peripheral surface of the shell 1, the movable column 52 penetrates through the open end of the fixed sleeve 51, the movable column 52 is in sliding fit with the inner side wall of the fixed sleeve 51, and one end, far away from the fixed sleeve 51, of the movable column 52 is fixedly connected with the pulley 12. The spring 53 is sleeved on the fixing sleeve 51, one end of the spring 53 is fixedly connected with the pulley 12, and the other end of the spring 53 is fixedly connected with the outer peripheral surface of the housing 1. The pulleys 12 are provided with two groups, the two groups of pulleys 12 are respectively arranged at two ends of the shell 1, and the group of pulleys 12 comprises three pulleys 12 which are uniformly arranged around the axis of the shell 1.

Referring to fig. 1 and 2, a rotating disc 13 is arranged in the housing 1, the circumferential surface of the rotating disc 13 is rotatably connected with the inner side wall of the housing 1, and the axis of the rotating disc 13 is overlapped with the axis of the housing 1. The repair mechanism 2 comprises a fixing rod 21, a fixing seat 22, a moving seat 23 and a mounting frame 24, the cross section of the fixing rod 21 is circular, the fixing rod 21 is fixed on the side face, far away from the mounting column 11, of the rotating disc 13, and the axis of the fixing rod 21 coincides with the axis of the rotating disc 13. A supporting column 14 is fixed on the inner side wall of the shell 1, the supporting column 14 is rotatably connected with a fixed rod 21 through a bearing, and the inner ring of the bearing is fixedly connected with the fixed rod 21. The fixing seat 22 is a circular plate, the fixing seat 22 is sleeved on the fixing rod 21, the fixing seat 22 is fixedly connected with the fixing rod 21, and the fixing seat 22 is arranged at the end portion of the fixing rod 21 far away from the mounting column 11. The connecting rings 111 are fixed on the end faces, far away from each other, of the mounting column 11 and the fixing seat 22, and the connecting rings 111 are arranged to facilitate connection of the repairing device and the traction mechanism, so that the repairing mechanism 2 moves in a pipeline to be repaired.

Referring to fig. 1 and 2, the movable base 23 is annular, the movable base 23 is sleeved on the fixed rod 21, and the movable base 23 is slidably engaged with the fixed rod 21. The fixing rod 21 is provided with a guide groove 211, the opening of the guide groove 211 is rectangular, and the length direction of the guide groove 211 is consistent with the length direction of the fixing rod 21. A guide block 231 is fixed on the inner side wall of the movable seat 23, the cross section of the guide block 231 is rectangular, the guide block 231 is arranged in the guide groove 211 of the fixed rod 21, and the guide block 231 is matched with the inner side wall of the guide groove 211 in a sliding manner.

Referring to fig. 1 and 2, a mounting frame 24 is arranged between the fixed seat 22 and the movable seat 23, the mounting frame 24 is a rectangular parallelepiped, a connecting rod 241 is arranged between the mounting frame 24 and the fixed seat 22 and between the movable seat 23 and the connecting rod 241, one end of the connecting rod 241 arranged between the mounting frame 24 and the fixed seat 22 is hinged to the fixed seat 22, and the other end of the connecting rod is hinged to the mounting frame 24. One end of a connecting rod 241 arranged between the mounting frame 24 and the moving seat 23 is hinged with the moving seat 23, and the other end is hinged with the mounting frame 24. The mounting brackets 24 are provided in four, and the four mounting brackets 24 are arranged uniformly around the axis of the fixing rod 21.

Referring to fig. 1 and 2, an arc plate 25 is arranged on the mounting frame 24, the curvature radius of the arc plate 25 is smaller than that of the pipeline to be repaired, the outer arc surface of the arc plate 25 is abutted against the inner side wall of the pipeline to be repaired, and a connecting column 251 is fixed on the inner arc surface of the arc plate 25. The mounting frame 24 is provided with a slot 243, the opening of the slot 243 is rectangular, the connecting column 251 is arranged in the slot 243 of the mounting frame 24, and the outer side wall of the connecting column 251 is in sliding fit with the inner side wall of the slot 243. The mounting frame 24 is provided with a positioning pin 242 in a penetrating manner, the positioning pin 242 is in threaded fit with the mounting frame 24, and the positioning pin 242 penetrates through the mounting frame 24 to be in threaded fit with the connecting column 251. The positioning pin 242 and the connecting column 251 are arranged to detachably connect the arc-shaped plate 25 with the mounting frame 24, so that the arc-shaped plate 25 with different inner diameters can be conveniently replaced by an operator.

Referring to fig. 1 and 2, a driving assembly 6 is arranged in the housing 1, the driving assembly 6 includes a cylinder 61, a pushing pipe 62 and a fixing plate 63, and the cylinder 61 is mounted on the side of the rotating disc 13 far away from the mounting column. The pushing tube 62 is slidably sleeved on the fixing rod 21, the inner side wall of the pushing tube 62 is in sliding fit with the outer side wall of the fixing rod 21, the pushing tube 62 is arranged in the shell 1 in a penetrating manner, the outer side wall of the pushing tube 62 is in sliding fit with the shell 1, and the pushing tube 62 is fixedly connected with the end face of the moving seat 23, which is close to the moving seat. The fixed plate 63 is fixedly sleeved on the push tube 62, the fixed plate 63 is arranged at the end part of the push tube 62 far away from the moving seat 23, and the end surface of the fixed plate 63 close to the cylinder 61 is fixedly connected with the piston rod of the cylinder 61. Operating personnel starts cylinder 61, and the piston rod of cylinder 61 promotes fixed plate 63 and removes, and fixed plate 63 removes and drives the removal of propelling movement pipe 62, and the removal of propelling movement pipe 62 drives and removes seat 23 and removes, removes seat 23 and removes to fixing base 22 and make mounting bracket 24 remove towards the direction of keeping away from dead lever 21, and mounting bracket 24 removes and drives arc 25 and remove, finally makes the outer cambered surface of arc 25 support the inside wall of tightly waiting to restore the pipeline.

Referring to fig. 1 and 2, the rotating mechanism 3 includes a motor 31, a driving gear 32, a driven gear 34 and a positioning rod 33, the motor 31 is fixedly installed on the inner end surface of the closed end of the casing 1, the driving gear 32 is sleeved on the output shaft of the motor 31, and the driving gear 32 is fixedly connected with the output shaft of the motor 31. The positioning rod 33 is fixed on the side of the rotating disc 13 close to the closed end of the housing 1, and the axis of the positioning rod 33 coincides with the axis of the rotating disc 13. The driven gear 34 is sleeved on the positioning rod 33, the driven gear 34 is fixedly connected with the positioning rod 33, and the driven gear 34 is meshed with the driving gear 32. An operator starts the motor 31, an output shaft of the motor 31 rotates to drive the driving gear 32 to rotate, the driving gear 32 rotates to drive the driven gear 34 to rotate, the driven gear 34 drives the positioning rod 33 to rotate, the positioning rod 33 rotates to drive the rotating disc 13 to rotate, the rotating disc 13 rotates to enable the fixing rod 21 to rotate, and then the arc-shaped plate 25 rotates.

The implementation principle of the local repair device for the trenchless pipeline in the embodiment of the application is as follows: the suitable arc 25 is changed according to the size of the curvature radius of the pipeline to be repaired to operating personnel earlier, operating personnel utilizes go-between 111 again to be connected with draw gear, and the setting of pulley 12 makes things convenient for the prosthetic devices to remove in the pipeline to be repaired, and the setting of fixed sleeve 51, removal post 52 and spring 53 makes pulley 12 support the inside wall of tight pipeline on the one hand, and on the other hand makes pulley 12 adapt to the pipeline of different internal diameters.

When the traction device moves the repairing device to the position to be repaired of the pipeline, the operator starts the electric pushing cylinder 41 at the same time, and the piston rod of the electric pushing cylinder 41 pushes the abutting block 42 to abut against the inner side wall of the pipeline, so that the position of the repairing device is fixed. Next, the operator starts the motor 31, the output shaft of the motor 31 rotates to drive the driving gear 32 to rotate, the driving gear 32 rotates to drive the driven gear 34 to rotate, the driven gear 34 rotates to enable the positioning rod 33 to rotate, the rotating disc 13 rotates along with the positioning rod 33, the rotating disc 13 rotates to enable the fixing rod 21 to rotate, and finally the arc-shaped plate 25 rotates to the collapse position facing the pipeline.

Operating personnel starts cylinder 61, the piston rod of cylinder 61 promotes fixed plate 63, fixed plate 63 removes and makes the promotion pipe 62 remove, promotion pipe 62 removes and makes removal seat 23 remove to fixing base 22, remove the distance between seat 23 and the fixing base 22 and reduce, mounting bracket 24 removes to the direction of keeping away from dead lever 21, mounting bracket 24 promotes arc 25 and treats the inside wall butt of restoreing the pipeline, thereby arc 25 restores the department of collapsing, slewing mechanism 3's setting is favorable to enlarging prosthetic devices's restoration scope, make things convenient for operating personnel to carry out the accuracy to the department of collapsing and restore.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a local prosthetic devices of non-excavation pipeline, includes casing (1), set up in repair body (2) in casing (1), set up in be used for on casing (1) fixed support positioning mechanism (4) of casing (1) position, its characterized in that: a rotating disc (13) is rotatably installed in the shell (1), the repairing mechanism (2) comprises a fixed rod (21) fixed on the rotating disc (13), a fixed seat (22) fixedly sleeved on the fixed rod (21), a moving seat (23) slidably sleeved on the fixed rod (21) and a mounting rack (24) arranged between the fixed seat (22) and the moving seat (23), connecting rods (241) are hinged among the mounting rack (24), the fixed seat (22) and the movable seat (23), an arc-shaped plate (25) is fixed on the mounting rack (24), the curvature radius of the arc-shaped plate (25) is smaller than that of the pipeline to be repaired, a driving component (6) for pushing the moving seat (23) to move along the fixed rod (21) is arranged in the shell (1), and a rotating mechanism (3) for driving the rotating disc (13) to rotate is arranged in the shell (1).

2. The trenchless pipeline local rehabilitation device of claim 1, wherein: slewing mechanism (3) including install in motor (31), fixed cover in casing (1) are located driving gear (32) on motor (31) output shaft, be fixed in locating lever (33) on rolling disc (13), fixed cover are located driven gear (34) on connecting rod (241), driving gear (32) with driven gear (34) intermeshing.

3. The trenchless pipeline local rehabilitation device of claim 1, wherein: the fixing seat (22) is provided with a driving assembly (6), the driving assembly (6) comprises an air cylinder (61) arranged on the rotating disc (13), a pushing pipe (62) which is sleeved on the fixing rod (21) in a sliding mode and fixedly connected with the moving seat (23), and a fixing plate (63) fixed on the pushing pipe (62), and the fixing plate (63) is fixedly connected with a piston rod of the air cylinder (61).

4. The trenchless pipeline local rehabilitation device of claim 1, wherein: the fixing rod (21) is provided with a guide groove (211), a guide block (231) is fixed on the inner side wall of the moving seat (23), and the guide block (231) is arranged in the guide groove (211) and is in sliding fit with the inner side wall of the guide groove (211).

5. The trenchless pipeline local rehabilitation device of claim 1, wherein: be fixed with spliced pole (251) on arc (25), offer on mounting bracket (24) be used for with spliced pole (251) grafting complex slot (243), wear to be equipped with locating pin (242) on mounting bracket (24), locating pin (242) pass mounting bracket (24) and with spliced pole (251) screw-thread fit.

6. The trenchless pipeline local rehabilitation device of claim 1, wherein: a supporting column (14) is fixed on the inner side wall of the shell (1), the supporting column (14) is rotatably connected with the fixing rod (21) through a bearing, and an inner ring of the bearing is fixedly connected with the fixing rod (21).

7. The trenchless pipeline local rehabilitation device of claim 1, wherein: the supporting and positioning mechanism (4) comprises an electric pushing cylinder (41) arranged on the shell (1) and a pressing block (42) fixed on a piston rod of the electric pushing cylinder (41), the supporting and positioning mechanism (4) is provided with a plurality of groups, and the supporting and positioning mechanism (4) surrounds the shell (1) and is uniformly arranged.

8. The trenchless pipeline local rehabilitation device of claim 1, wherein: be provided with a plurality of pulleys (12) on casing (1), pulley (12) with be provided with coupling assembling (5) between casing (1), coupling assembling (5) including being fixed in fixed sleeve (51) on casing (1), wear to locate in fixed sleeve (51) and with fixed sleeve (51) inside wall slides complex removal post (52), set up in casing (1) with spring (53) between pulley (12), remove post (52) with pulley (12) fixed connection, spring (53) cover is located on fixed sleeve (51).