Non-excavation repairing device for urban drainage pipeline in high-water-level environment

Abstract

The utility model provides a non-excavation repairing device for an urban drainage pipeline in a high-water-level environment. The non-excavation repairing device comprises a cart and a storage tank. The storage tank is connected with a discharge pipe through a pump body; the cart is provided with a containing cavity and a cart top plate, through holes are formed in the front side and the rear side of the cart, and a water plugging assembly is arranged. The water plugging assembly comprises an air bag and an air supply pipe. The air bag is arranged on the front side or the rear side of the cart, and a supporting assembly is fixedly arranged on the air bag. The air supply pipe is arranged in the containing cavity, and one end of the air supply pipe extends to the front side or the rear side of the cart through the through hole and communicates with the air bag on the same side; wherein a recycling assembly is arranged in the containing cavity, limiting assemblies are arranged on the front side and the rear side of the cart correspondingly, and an air conveying assembly connected with the two air conveying pipes is arranged on the cart top plate. According to the non-excavation repairing device for the urban drainage pipeline in the high-water-level environment, the influence of high-water-level water flow in the repairing environment can be avoided, it is guaranteed that the discharging pipe can stably and accurately output slurry to the repairing area, and the non-excavation repairing efficiency of the urban drainage pipeline is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipe network repair, and particularly relates to a non-excavation repair device for urban drainage pipeline under high water level environment. BACKGROUND

[0002] The urban drainage pipeline is an important part of urban infrastructure, and bears the function of discharging rainwater and sewage. However, due to long-term use, environmental corrosion, geological subsidence and other reasons, the drainage pipeline is prone to cracks, damage and leakage, etc., resulting in waste of water resources, environmental pollution and even ground subsidence and other serious consequences. The traditional pipeline repair method usually needs to excavate the ground, has a long construction period, high cost, and causes great influence on urban traffic and residents' life; therefore, in recent years, the non-excavation repair technology has gradually become the mainstream method for pipeline repair.

[0003] In the prior art, the non-excavation repair device comprises a cart and a storage tank fixed on the cart and used for accommodating slurry, the storage tank is connected with a pump body, and directional discharge is carried out by means of a discharge pipe connected at the outlet end of the pump body, so as to ensure that the slurry is coated on the repair area.

[0004] The inventor finds that in the rainy season and flood period, the water level in the drainage pipeline rises and the water flow speed increases, that is, the working condition of high water level environment; under the high water level environment, the water flow easily interferes with the positioning of the discharge pipe, and the slurry cannot be accurately coated on the repair area, resulting in the technical problem of low non-excavation repair efficiency of the urban drainage pipeline. CONTENT OF THE UTILITY MODEL

[0005] The embodiment of the application provides a non-excavation repair device for urban drainage pipeline under high water level environment, which aims to eliminate the influence of high water flow in the repair environment, ensure that the discharge pipe can stably and accurately output the slurry to the repair area, and ensure the non-excavation repair efficiency of the urban drainage pipeline.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the application is:

[0007] A non-excavation repair device for urban drainage pipeline under high water level environment is provided, comprising a cart and a storage tank, the storage tank is connected with a discharge pipe through a pump body; the cart has an accommodating cavity with an opening facing upward, and a roof plate suitable for closing the accommodating cavity; the storage tank is fixedly arranged on the upper side of the roof plate, and through holes communicating with the accommodating cavity are formed in the front and rear sides of the cart; and water plugging assemblies are arranged on the front and rear sides of the cart, the water plugging assemblies comprise:

[0008] An air bag is arranged on the front side or the rear side of the stroller, and has an inflated use state and a deflated idle state; a support assembly is fixedly arranged on the outer wall of the air bag and used for abutting against the top wall of the pipe network, so that a ventilation cavity is formed between the air bag in the use state and the top wall of the pipe network; and

[0009] A gas delivery pipe is arranged in the accommodating cavity, and one end of the gas delivery pipe extends to the front side or the rear side of the stroller through the through hole, and the extending end of the gas delivery pipe is in communication with the corresponding air bag;

[0010] The accommodating cavity is provided with a recovery assembly for pulling the gas delivery pipe into the accommodating cavity, so that the two air bags abut against the front side and the rear side of the stroller respectively; the front side and the rear side of the stroller are provided with a limiting assembly for abutting against the air bag in the idle state; and the top plate of the stroller is fixedly provided with a gas input assembly for inputting gas into the two gas delivery pipes.

[0011] In a possible implementation, the support assembly comprises:

[0012] A mounting seat is fixedly arranged on the outer wall of the air bag, and a threaded groove is formed in the side of the mounting seat away from the air bag; and

[0013] A jacking bar is arranged on the side of the mounting seat away from the air bag, and a lead screw is fixedly arranged on the jacking bar and perpendicular to the axial direction of the jacking bar and suitable for being screwed with the threaded groove.

[0014] In a possible implementation, the limiting assembly comprises:

[0015] A limiting arm is hingedly arranged on the front side or the rear side of the stroller in the up-down direction, and is suitable for swinging to abut against the front side and the rear side of the air bag in the idle state respectively; and the swinging end of the limiting arm is fixedly connected with a butt joint frame on the outer side of the limiting arm; and

[0016] A locking arm is hingedly arranged on the front side or the rear side of the stroller in the front-rear direction, and is suitable for swinging into the butt joint frame to limit the swinging of the limiting arm;

[0017] The inner side of the limiting arm is fixedly connected with an elastic pad for abutting against the air bag.

[0018] In a possible implementation, the front end surface and the rear end surface of the top plate of the stroller have convex shafts, and the outer wall of the locking arm has a butt joint groove penetrating in the front-rear direction and suitable for embedding the convex shafts.

[0019] In a possible implementation, the top plate of the stroller has two reserved holes, and the two gas delivery pipes extend to the upper side of the top plate of the stroller through the two reserved holes respectively; the gas input assembly comprises:

[0020] A gas pump is fixedly arranged on the roof panel, and a gas outlet pipe for discharging gas outward is connected to a gas outlet end of the gas pump.

[0021] The gas outlet pipe is connected to the extending ends of the two gas supply pipes through a connecting piece.

[0022] In a possible implementation, the gas supply assembly further comprises:

[0023] A gas storage tank is fixedly arranged on the roof panel and is in communication with the gas inlet end of the gas pump.

[0024] In a possible implementation, the recovery assembly comprises:

[0025] Two sliding plates are arranged side by side in the left-right direction in the accommodating cavity and are in sliding connection with the inner bottom surface of the accommodating cavity in the left-right direction. Adjacent sides of the two sliding plates are each provided with a plurality of extending arms arranged in the front-rear direction. The extending end of each extending arm is provided with a push rod extending upward, and each push rod is in abutment with the gas supply pipe on the side of the corresponding sliding plate.

[0026] A synchronous driving member is arranged in the accommodating cavity and is connected to the two sliding plates to drive the two sliding plates to move towards or away from each other.

[0027] In a possible implementation, the synchronous driving member comprises:

[0028] Two transmission nuts are coaxially arranged and are fixedly arranged on the two sliding plates, respectively.

[0029] A bidirectional screw is rotatably arranged in the accommodating cavity and is in transmission connection with a rotating motor for driving the rotation thereof.

[0030] The bidirectional screw has two screw threads with opposite screw directions, and the two screw threads are in threaded connection with the two transmission nuts, respectively.

[0031] In a possible implementation, the upper end of each push rod is provided with an anti-falling disc.

[0032] The anti-falling disc is in abutment with the upper side of the gas supply pipe to limit the disengagement of the gas supply pipe from the push rod.

[0033] In a possible implementation, a plurality of grooves are arranged on the adjacent sides of the two sliding plates, and each groove is adapted to embed the extending end of the extending arm.

[0034] In the embodiment of the present application, the gas conveying assembly can convey gas to the two gas conveying pipes to inflate the air bags to the use state; in this state, the outer wall of the air bag is in contact with the inner circumferential wall of the pipe network to limit or slow down the water flow, so as to ensure that the working area between the two air bags is in a low water level state.

[0035] Wherein, the air bag outer wall and the pipe network inner top wall have a supporting assembly to form a gas passage. And after use, the two gas conveying pipes can be pulled back through the recovery assembly, and the two air bags in the idle state after deflation can be fixed on the front and rear sides of the cart through the limiting assembly.

[0036] The non-excavation repair device for urban drainage pipeline in high water level environment provided by the embodiment can avoid the influence of high water flow in the repair environment, ensure that the discharge pipe can stably and accurately output slurry to the repair area, and ensure the non-excavation repair efficiency of the urban drainage pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 One of the three-dimensional structure schematic diagram of the non-excavation repair device for urban drainage pipeline in high water level environment provided by the embodiment of the present application;

[0039] Figure 2 The three-dimensional structure schematic diagram of the non-excavation repair device for urban drainage pipeline in high water level environment provided by the embodiment of the present application (for easy display, the air bag is hidden);

[0040] Figure 3 The three-dimensional structure schematic diagram of the non-excavation repair device for urban drainage pipeline in high water level environment provided by the embodiment of the present application; Figure 2 The local enlarged schematic diagram of the upper circle A;

[0041] Figure 4 The local enlarged schematic diagram of the limiting assembly used in the embodiment of the present application;

[0042] Figure 5 The three-dimensional structure schematic diagram of the cart hidden behind the roof plate used in the embodiment of the present application;

[0043] Figure 6 The three-dimensional structure schematic diagram of the recovery assembly used in the embodiment of the present application;

[0044] Figure 7An exploded structural schematic view of the sliding plate and transmission nut employed in the embodiments of the present application;

[0045] Figure 8 An exploded structural schematic view of the support assembly employed in the embodiments of the present application;

[0046] Figure 9 A perspective structural schematic view of the gas delivery assembly employed in the embodiments of the present application;

[0047] Figure 10 A partial enlarged schematic view of the connecting piece in a sectional view employed in the embodiments of the present application;

[0048] The reference signs are explained as follows: 1, trolley; 11, accommodating cavity; 12, trolley roof plate; 121, convex shaft; 122, reserved hole; 13, through hole; 2, storage tank; 21, pump body; 22, discharge pipe; 3, water plugging assembly; 31, air bag; 32, air feeding pipe; 4, support assembly; 41, mounting seat; 411, threaded groove; 42, jacking bar; 421, distance adjusting screw; 5, recycling assembly; 51, sliding plate; 511, extension arm; 512, push rod; 513, anti-falling disc; 514, groove; 52, synchronous driving member; 521, transmission nut; 522, bidirectional screw; 5221, rotating motor; 6, limiting assembly; 61, limiting arm; 611, butt joint frame; 612, elastic pad; 62, locking arm; 621, butt joint groove; 7, gas delivery assembly; 71, air pump; 711, air outlet pipe; 712, connecting piece; 72, air storage tank. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0051] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise explicitly and specifically limited.

[0053] Please refer to Figures 1 to 10 The high-water-level urban drainage pipeline trenchless repair device provided by the present application will be described below. The high-water-level urban drainage pipeline trenchless repair device provided by the present application comprises a cart 1 and a storage tank 2.

[0054] The cart 1 is used to move along the pipe network. In this embodiment, for the convenience of description, the moving direction of the cart 1 is defined as the front-rear direction.

[0055] The storage tank 2 is connected with a discharge pipe 22 through a pump body 21. Specifically, the storage tank 2 is connected with the pump body 21 for discharging slurry outward. The discharge port of the pump body 21 is connected with the discharge pipe 22. During the repair process, the operator holds the discharge pipe 22 or uses a tool to support the discharge pipe 22 to discharge the slurry in a specific direction.

[0056] In this embodiment, the cart 1 has an accommodating cavity 11 with an opening facing upward, and a cart roof plate 12 detachably connected with the cart 1 and suitable for closing the accommodating cavity 11. Based on this, the aforementioned storage tank 2 is fixedly arranged on the upper side of the cart roof plate 12, and the front and rear sides of the cart 1 are both provided with through holes 13 communicating with the accommodating cavity 11 and avoiding the cart roof plate 12.

[0057] The front and rear sides of the cart 1 are both provided with water plugging assemblies 3. The water plugging assemblies 3 comprise air bags 31 and air supply pipes 32.

[0058] The air bags 31 are arranged on the front side or the rear side of the cart 1 and have an inflated use state and a deflated idle state. The air bags 31 are fixedly provided with support assemblies 4 on the outer walls for abutting against the inner top wall of the pipe network, so that the air bags 31 in the use state form an air passage with the inner top wall of the pipe network; and

[0059] The air supply pipes 32 are arranged in the accommodating cavity 11 and have one end extending to the front side or the rear side of the cart 1 through the through holes 13, and the extending end of the air supply pipes 32 communicates with the corresponding air bags 31.

[0060] The accommodating cavity 11 is provided with a recovery assembly 5 for pulling the air pipes 32 to the inside to make the two air bags 31 abut against the front and rear sides of the stroller 1; the front and rear sides of the stroller 1 are provided with limiting assemblies 6 for abutting against the air bags 31 in the idle state, and the roof plate 12 is fixedly provided with a gas feeding assembly 7 for feeding gas to the two air pipes 32.

[0061] In the embodiment, the gas feeding assembly 7 can feed gas to the two air pipes 32 to inflate the air bags 31 to the use state; in this state, the outer wall of the air bag 31 abuts against the inner top wall of the pipe network to limit the water flow or slow down the water flow to ensure that the working area between the two air bags 31 is in a low water level state.

[0062] The outer wall of the air bag 31 and the inner top wall of the pipe network have a supporting assembly 4 to form an air passage for gas. After use, the two air pipes 32 can be pulled back by the recovery assembly 5, and the two air bags 31 in the idle state after deflation can be fixed on the front and rear sides of the stroller 1 by the limiting assembly 6.

[0063] Compared with the prior art, the non-excavation repair device for urban drainage pipeline in high water level environment provided by the embodiment can avoid the influence of high water flow in the repair environment, ensure that the discharge pipe 22 can stably and accurately output slurry to the repair area, and ensure the non-excavation repair efficiency of the urban drainage pipeline.

[0064] In some embodiments, as shown in Figure 1 and Figure 8 The supporting assembly 4 includes a mounting seat 41 and a top support bar 42.

[0065] The mounting seat 41 is fixedly arranged on the outer wall of the air bag 31, and a threaded groove 411 is formed in the side away from the air bag 31.

[0066] The top support bar 42 is arranged on the side of the mounting seat 41 away from the air bag 31, and a distance adjusting screw 421 perpendicular to the axial direction of the top support bar 42 is fixedly arranged on the top support bar 42 and is suitable for being screwed with the threaded groove 411.

[0067] In actual use, the axial direction of the top support bar 42 is usually parallel to the front and rear directions to ensure that it has a large contact area with the inner top wall of the pipe network.

[0068] In some embodiments, as shown in Figure 2 and Figure 4 The limiting assembly 6 includes a limiting arm 61 and a locking arm 62.

[0069] The limiting arm 61 is hinged to the front side or rear side of the trolley 1 in the up-down direction and is adapted to swing to abut the front and rear sides of the air bag 31 in the idle state, respectively; and the swing end of the limiting arm 61 is fixedly connected with a butt frame 611 on the outer side thereof.

[0070] The locking arm 62 is hinged to the front side or rear side of the trolley 1 in the front-rear direction and is adapted to swing into the butt frame 611 to limit the swing of the limiting arm 61.

[0071] The inner side of the limiting arm 61 is fixedly connected with an elastic pad 612 for abutting the air bag 31 to ensure that the air bag 31 is pressed, on the one hand to ensure that the gas in the air bag 31 is discharged, and on the other hand to cooperate with the trolley 1 to press the air bag 31 to avoid movement of the air bag 31 relative to the limiting arm 61.

[0072] In some embodiments, as shown in Figure 4 The front end face and the rear end face of the roof plate 12 each have a convex shaft 121, and the outer wall of the locking arm 62 has a butt groove 621 that penetrates in the front-rear direction and is adapted to embed the convex shaft 121, when the locking arm 62 swings to embed the convex shaft 121 in the butt groove 621, on the one hand, the structural stability of the roof plate 12 and the trolley 1 can be enhanced, and on the other hand, the locking arm 62 can be ensured to avoid the limiting arm 61.

[0073] In some embodiments, as shown in Figure 4 , Figure 9 and Figure 10 The roof plate 12 has two reserved holes 122, and the two gas supply pipes 32 respectively extend to the upper side of the roof plate 12 through the two reserved holes 122; based on this, in the present embodiment, the gas delivery assembly 7 includes a gas pump 71, which is fixedly arranged on the roof plate 12 and has a gas outlet pipe 711 connected to the gas outlet end thereof for discharging gas outward.

[0074] The gas outlet pipe 711 is connected to the extension ends of the two gas supply pipes 32 through a connecting piece 712.

[0075] In some embodiments, as shown in Figure 9 The gas delivery assembly 7 further includes a gas storage tank 72, which is fixedly arranged on the roof plate 12 and is in communication with the gas inlet end of the gas pump 71 to prevent the situation of oxygen thinning due to excessive gas extraction inside the pipe network, thereby ensuring the safety of the repair site.

[0076] In some embodiments, as shown in Figures 5 to 7 The recovery assembly 5 includes two sliding plates 51 and a synchronous driving member 52.

[0077] The two sliding plates 51 are arranged side by side in the left-right direction in the containing cavity 11 and are each slidingly connected with the inner bottom face of the containing cavity 11 in the left-right direction.

[0078] The adjacent sides of the two sliding plates 51 are each provided with a plurality of extension arms 511 arranged in the front-rear direction, and the extension end of each extension arm 511 is provided with a push rod 512 extending upward, and each push rod 512 is in abutment with the air supply pipe 32 towards the side of the corresponding sliding plate 51.

[0079] The synchronous driving member 52 is arranged in the accommodating cavity 11 and is connected with the two sliding plates 51, so as to drive the two sliding plates 51 to move towards each other or away from each other.

[0080] In some embodiments, as shown in Figure 6 and Figure 7 , the synchronous driving member 52 comprises two transmission nuts 521 and a bidirectional screw rod 522.

[0081] The two transmission nuts 521 are coaxially arranged and are fixedly arranged on the two sliding plates 51 respectively.

[0082] The bidirectional screw rod 522 is rotationally arranged in the accommodating cavity 11 and is drivingly connected with a rotating motor 5221 for driving the rotation thereof.

[0083] In the present embodiment, the bidirectional screw rod 522 has two thread portions with opposite thread directions, and the two thread portions are threadedly connected with the two transmission nuts 521 respectively.

[0084] In some embodiments, as shown in Figure 6 and Figure 7 , the upper end of each push rod 512 is provided with an anti-disengagement disc 513; the anti-disengagement disc 513 is in abutment with the upper side of the air supply pipe 32, so as to limit the disengagement of the air supply pipe 32 from the push rod 512.

[0085] In some embodiments, as shown in Figure 6 and Figure 7 , a plurality of grooves 514 are arranged on the adjacent sides of the two sliding plates 51, and each groove 514 is adapted to embed the extension end of the extension arm 511.

[0086] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for trenchless repair of urban drainage pipelines in high water level environment, comprising a trolley and a storage tank, wherein the storage tank is connected with a discharge pipe through a pump body; characterized in that, The trolley has an accommodating cavity with an opening facing upward, and a trolley roof plate adapted to close the accommodating cavity; the storage tank is fixedly arranged on the upper side of the trolley roof plate, and the front and rear sides of the trolley are both provided with a through hole in communication with the accommodating cavity; and the front and rear sides of the trolley are both provided with a water plugging assembly, which comprises: an air bag arranged on the front side or the rear side of the trolley, having an internal inflation use state and a deflation idle state; a support assembly fixedly arranged on the outer wall of the air bag for abutting against the top wall of the pipe network, so as to form an air passage between the air bag in the use state and the top wall of the pipe network; and a gas supply pipe arranged in the accommodating cavity, one end of which extends to the front side or the rear side of the trolley through the through hole, and the extending end of the gas supply pipe is in communication with the corresponding air bag; wherein, a recovery assembly is arranged in the accommodating cavity for pulling the gas supply pipe to the inside, so that the two air bags abut against the front and rear sides of the trolley respectively; the front and rear sides of the trolley are both provided with a limiting assembly for connecting with the air bag in the idle state; and the trolley roof plate is fixedly provided with a gas input assembly for inputting gas to the two gas supply pipes.

2. The trenchless rehabilitation device for urban sewer pipes in high water level environment according to claim 1, characterized in that, The support assembly comprises: a mounting seat fixedly arranged on the outer wall of the air bag, and a threaded groove is formed on the side of the mounting seat away from the air bag; and a top support bar arranged on the side of the mounting seat away from the air bag, and a distance adjusting screw fixedly arranged on the top support bar is perpendicular to the axial direction of the top support bar and is adapted to be threadedly connected with the threaded groove.

3. The trenchless rehabilitation device for urban sewer pipes in high water table environments according to claim 1, characterized in that, The limiting assembly comprises: a limiting arm hingedly connected to the front side or the rear side of the trolley in the up-down direction, and adapted to swing to abut against the front and rear sides of the air bag in the idle state respectively; and the swing end of the limiting arm is provided with a butt joint frame fixedly connected to the outer side of the limiting arm; and a locking arm hingedly connected to the front side or the rear side of the trolley in the front-rear direction, and adapted to swing into the butt joint frame to limit the swing of the limiting arm; wherein, the inner side of the limiting arm is fixedly connected with an elastic pad for abutting against the air bag.

4. The trenchless rehabilitation device for urban sewer pipes in high water table environments according to claim 3, characterized in that, The front end face and the rear end face of the trolley roof plate are both provided with a convex shaft, and the outer wall of the locking arm is provided with a butt joint groove penetrating in the front-rear direction and adapted to embed the convex shaft.

5. The trenchless rehabilitation device for urban sewer pipes in high water table environments of claim 1, wherein, The trolley roof plate is provided with two reserved holes, and the two gas supply pipes extend to the upper side of the trolley roof plate through the two reserved holes respectively; the gas input assembly comprises: a gas pump fixedly arranged on the trolley roof plate, and the gas outlet end of the gas pump is connected with a gas outlet pipe for discharging gas outward; wherein, the gas outlet pipe is connected with the extending ends of the two gas supply pipes through a connecting piece.

6. The trenchless rehabilitation device for urban sewer pipes in high water table environments according to claim 5, characterized in that, The gas input assembly further comprises: a storage tank fixedly arranged on the trolley roof plate and in communication with the gas inlet end of the gas pump.

7. The trenchless rehabilitation device for urban sewer pipes in high water table environments according to claim 1, characterized in that, The recovery assembly comprises: Two sliding plates are arranged side by side in the accommodating cavity in the left-right direction and are slidably connected to the inner bottom surface of the accommodating cavity in the left-right direction; the adjacent sides of the two sliding plates are each provided with a plurality of extension arms arranged in the front-rear direction; the extension end of each extension arm is provided with a push rod extending upward, and each push rod is in abutment with the air supply pipe on the side of the corresponding sliding plate; and A synchronous driving member is arranged in the accommodating cavity and connected to the two sliding plates to drive the two sliding plates to move towards or away from each other.

8. The trenchless rehabilitation device for urban sewer pipes in high water table environments according to claim 7, characterized in that, The synchronous driving member comprises: Two transmission nuts are coaxially arranged and fixedly arranged on the two sliding plates, respectively; and A bidirectional screw is rotatably arranged in the accommodating cavity and is drivingly connected to a rotating motor for driving the rotation thereof; The bidirectional screw has two screw threads with opposite screw directions, and the two screw threads are threadedly connected to the two transmission nuts, respectively.

9. The trenchless rehabilitation device for urban sewer pipes in high water table environments according to claim 7, characterized in that, The upper end of each push rod is provided with an anti-disengagement disc. The anti-disengagement disc abuts against the upper side of the air supply pipe to limit the air supply pipe from disengaging from the push rod.

10. The trenchless rehabilitation device for urban sewer pipes in high water table environments according to claim 7, characterized in that, A plurality of grooves are arranged on the adjacent sides of the two sliding plates, and each groove is adapted to embed the extension end of the extension arm.

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