CN117189945A - Non-excavation pipeline in-situ replacement equipment and replacement method - Google Patents

Abstract

The application provides non-excavation pipeline in-situ replacement equipment and a replacement method, wherein the replacement equipment comprises a traction device, a pipe expanding device, a pipe guiding device and a pushing device, wherein the traction device is arranged above a receiving well and extends downwards into an old pipeline; the pipe expanding device is connected with the extending end of the traction device and is used for propping the old pipeline towards the periphery to expand the old pipeline and form a pipe paving hole; the tube guiding device is connected to the rear end of the tube expanding device; the pushing device is arranged in the sending well and used for pushing the rear end of the new pipeline to drive the new pipeline to move forward by matching with the pipe guiding device. According to the non-excavation pipeline in-situ replacement equipment provided by the application, the traction device is utilized to drive the pipe expanding device to move forwards, so that effective expansion of an old pipeline is realized, the pipe guiding device at the rear end of the pipe expanding device is utilized to pull a new pipeline forwards, and the pushing effect of the pushing device on the rear end of the new pipeline is assisted, so that the forward moving speed of the new pipeline can be improved, the in-situ replacement of the new pipeline is realized, and the laying efficiency of the new pipeline is improved.

Description

Non-excavation pipeline in-situ replacement equipment and replacement method

Technical Field

The application belongs to the technical field of non-excavation pipeline replacement, and particularly relates to non-excavation pipeline in-situ replacement equipment and a replacement method.

Background

After a pipeline laid underground is used for a certain period of time, the pipeline is easy to corrode and age, and accidents such as pipeline bursting and pavement collapse are caused, so that a large number of old pipelines need to be updated regularly to meet the requirement of subsequent use.

At present, one surface of a pipeline in the reconstruction and repair process has the problems of narrow space, high difficulty in arrangement of mechanical equipment and the like, and the traditional open cut method can occupy a large amount of ground space, so that the space arrangement requirement of a city core area is difficult to meet. In the process of dismantling an old pipeline and laying a new pipeline, the new pipeline is laid by a pushing device by adopting a non-excavation method, so that the construction efficiency and the construction quality are seriously affected.

Disclosure of Invention

The application aims to provide non-excavation pipeline in-situ replacement equipment and replacement method, which can conveniently remove old pipelines and lay new pipelines in time, and are beneficial to improving the replacement efficiency of the pipelines and reducing the replacement difficulty of the pipelines.

In order to achieve the above purpose, the application adopts the following technical scheme: provided is a non-excavation pipeline in-situ replacement apparatus, comprising:

the traction device is arranged above the receiving well and extends downwards into the old pipeline;

the pipe expanding device is connected to the extending end of the traction device and is arranged close to the rear end of the old pipe, and the pipe expanding device is used for propping the old pipe towards the periphery to expand the old pipe and form a pipe paving hole;

the pipe guiding device is connected to the rear end of the pipe expanding device and positioned in the new pipeline and used for driving the new pipeline to move forward so as to be paved in the pipe paving hole;

the pushing device is arranged in the sending well and used for pushing the rear end of the new pipeline to drive the new pipeline to move forward by matching with the pipe guiding device.

In one possible implementation, the tube expansion device comprises:

the taper shaft is arranged at the rear end of the old pipeline in a penetrating way along the axial direction of the old pipeline and protrudes out of the old pipeline backwards, the guide pipe device is connected to the rear end face of the taper shaft, and the extension end of the traction device is connected to the front end face of the taper shaft and is used for driving the taper shaft to enter the old pipeline forwards;

the spiral taper sleeve is sleeved on the periphery of the taper shaft and is in running fit with the taper shaft, and external threads for propping against the inner peripheral wall of the old pipeline to burst the old pipeline are arranged on the peripheral wall of the spiral taper sleeve.

In one possible implementation manner, the outer periphery of the conical shaft is provided with balls in rolling fit with the inner wall of the spiral conical sleeve, the outer periphery wall of the conical shaft is provided with first annular grooves used for embedding the balls and in rolling fit with the balls, the inner periphery wall of the spiral conical sleeve is provided with second annular grooves which are in one-to-one correspondence with the first annular grooves and in rolling fit with the balls, and the sections of the first annular grooves and the second annular grooves are respectively semicircular.

In one possible implementation, the guide tube device includes:

the conical guide seat is connected to the rear end of the conical shaft, and the diameter of the conical guide seat is gradually increased from front to back;

the plurality of matched cone blocks are distributed at intervals along the circumference of the conical guide seat and can be driven by the forward movement of the conical guide seat to move backwards to be propped against the inner peripheral wall of the new pipeline and drive the new pipeline to move forwards to be paved in the pipe paving hole.

In some embodiments, a sliding groove extending along the bus is formed in the outer peripheral wall of the conical guide seat, a sliding block extending along the bus is arranged on the inner peripheral wall of the matched conical block, and the sliding block is slidably connected in the sliding groove to guide the conical guide seat and the matched conical block to move in opposite directions and enable the matched conical block to be expanded in the new pipeline.

In some embodiments, the rear end of the conical guide seat is connected with a limiting end disc, and the plate surface of the limiting end disc is perpendicular to the main shaft of the conical guide seat and used for limiting the axial displacement of the sliding block.

In one possible implementation manner, the front end surface of the pipe expanding device is provided with a traction hole, the opening size of the traction hole is smaller than the size of the inner cavity, and the traction device comprises:

the traction disc is arranged in the traction hole;

the rear end of the traction rope is connected to the front end surface of the traction disc;

the two fixed pulleys are respectively arranged in the receiving well and above the receiving well and are used for guiding the traction rope to change direction;

and the winch is connected with the front end of the traction rope and used for driving the traction rope to move forward so as to enable the pipe expanding device to expand the old pipe and enable the pipe guiding device to pull the new pipe, and the winch is arranged on the front side above the receiving well.

In one possible implementation, the pushing device comprises:

the mounting seat is arranged in the sending well and is adjacently arranged with a side wall of the mounting well far away from the receiving well;

the pushing piece is connected to the mounting seat and provided with a pushing end extending to one side of the receiving well, and the pushing end is of a frustum structure with the outer diameter gradually reduced from front to back;

the pushing disc is connected to the pushing end and sleeved on the rear side of the new pipeline, the pushing disc is provided with a conical peripheral wall which gradually inclines towards the outer periphery from front to back, the conical peripheral wall is used for being abutted with the inner peripheral wall of the pipe laying hole to guide the new pipeline to be pushed forward, the pushing disc is provided with a conical hole for accommodating the pushing end, and the outer peripheral wall of the pushing end can be abutted against the inner peripheral wall of the conical hole to push the pushing disc and the new pipeline forward;

the front side surface of the pushing disc is provided with an annular groove which is concavely arranged to accommodate the rear end of the new pipeline, and two side walls of the annular groove are respectively provided with flexible layers which are in contact fit with the inner wall and the outer wall of the new pipeline.

In some embodiments, the rear side of the pushing disc is provided with a plurality of rib plates distributed at intervals in the circumferential direction, the rear side of the rib plates is connected with a connecting ring coaxially arranged with the pushing disc, the front side of the connecting ring is fixedly connected with the rear end face of the rib plates, the rib plates are positioned at the periphery of the conical holes, and the width of the rear side of the rib plates is gradually reduced.

An in-situ trenchless pipeline replacement method for pipeline replacement by trenchless pipeline in-situ replacement equipment, comprising the steps of:

installing a traction device to the receiving well, and enabling the extension end of the traction device to extend to the rear end of the old pipeline by penetrating the old pipeline;

installing an expansion pipe device and a pipe guiding device to the rear end of an old pipe, connecting a traction device and the pipe guiding device, installing a new pipe into a sending well, and enabling the traction device to enter the front end of the new pipe;

installing a pushing device into the sending well, and installing a pushing disc to the rear end of the new pipeline, so that the pushing end stretches into a conical hole of the pushing disc;

starting a winch and a pushing device, pulling the pipe expanding device to move forwards by using a pulling rope, enabling the spiral taper sleeve to rotate circumferentially relative to the taper shaft so as to expand the old pipe, enabling the taper guide seat to move forwards along with the taper shaft, enabling the matched taper block to move backwards relative to the taper guide seat and be abutted and pressed on the inner peripheral wall of the new pipe, and enabling the new pipe to move forwards along with the pipe expanding device; meanwhile, the pushing disc can be matched with the tube guiding device to drive the new pipeline to move forwards under the action of the pushing end.

Compared with the prior art, the non-excavation pipeline in-situ replacement equipment provided by the embodiment of the application has the advantages that the traction device is utilized to drive the pipe expanding device to move forwards, so that effective expansion of an old pipeline is realized, the pipe guiding device at the rear end of the pipe expanding device is utilized to pull the new pipeline forwards, the pushing action of the auxiliary pushing device on the rear end of the new pipeline is utilized, the advancing speed of the new pipeline can be improved, the effective laying of the new pipeline is ensured, the operation difficulty of new pipeline replacement is reduced, the in-situ replacement of the new pipeline is realized, and the laying efficiency of the new pipeline is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an in-situ replacement apparatus for a trenchless pipeline according to an embodiment of the present application;

FIG. 2 is a schematic view of a partial enlarged structure of I in FIG. 1 according to an embodiment of the present application;

FIG. 3 is a schematic view of a partial enlarged view of the structure II in FIG. 1 according to the embodiment of the present application;

FIG. 4 is a schematic view of the spiral cone sleeve of FIG. 1 according to an embodiment of the present application;

FIG. 5 is a schematic view of the tapered guide seat and one of the mating tapered blocks of FIG. 1 according to an embodiment of the present application;

FIG. 6 is a schematic view of another angle of the mating cone block of FIG. 5 according to an embodiment of the present application;

FIG. 7 is a schematic view of a front view of the ejector of FIG. 1 according to an embodiment of the present application;

fig. 8 is a schematic view of a partial enlarged view of iii in fig. 7 according to an embodiment of the present application.

Wherein, each reference sign in the figure:

1. a traction device; 11. a traction disk; 12. a traction rope; 13. a fixed pulley; 14. a hoist; 2. a tube expanding device; 21. a conical shaft; 211. a first ring groove; 212. a traction hole; 22. a spiral taper sleeve; 221. a second ring groove; 222. an external thread; 23. a ball; 3. a tube guiding device; 31. a conical guide seat; 32. matching with a cone block; 33. a slip groove; 34. a sliding block; 35. limiting end plates; 4. a pushing device; 41. a mounting base; 42. a propulsion member; 43. pushing the disc; 431. a tightening ring; 44. a tapered bore; 45. an annular groove; 46. a flexible layer; 47. rib plates; 48. a connecting ring; 49. a push rod; 51. a sending well; 52. a receiving well; 61. old pipes; 62. new pipe.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a number" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 8 together, the in-situ replacement apparatus and the replacement method for a trenchless pipeline according to the present application will now be described. The non-excavation pipeline in-situ replacement equipment comprises a traction device 1, a pipe expanding device 2, a pipe guiding device 3 and a pushing device 4, wherein the traction device 1 is arranged above a receiving well 52 and extends downwards into an old pipeline 61; the pipe expanding device 2 is connected to the extending end of the traction device 1 and is arranged near the rear end of the old pipe 61, and the pipe expanding device 2 is used for propping the old pipe 61 towards the periphery to crack the old pipe 61 and form a pipe paving hole; the pipe guiding device 3 is connected to the rear end of the pipe expanding device 2 and is positioned in the new pipeline 62 and used for driving the new pipeline 62 to move forward so as to be paved in the pipe paving hole; the pushing device 4 is disposed in the sending well 51, and is used for pushing the rear end of the new pipe 62 to cooperate with the pipe guiding device 3 to drive the new pipe 62 to move forward.

Compared with the prior art, the trenchless pipeline in-situ replacement equipment provided by the embodiment has the advantages that the traction device 1 is utilized to drive the pipe expanding device 2 to move forwards, effective expansion of the old pipeline 61 is achieved, the pipe guiding device 3 at the rear end of the pipe expanding device 2 is utilized to pull the new pipeline 62 forwards, the auxiliary pushing device 4 is utilized to push the rear end of the new pipeline 62, the advancing speed of the new pipeline 62 can be improved, effective laying of the new pipeline 62 is guaranteed, the operation difficulty of replacement of the new pipeline 62 is reduced, in-situ replacement of the new pipeline 62 is achieved, and the laying efficiency of the new pipeline 62 is improved.

In this embodiment, the replacement device can realize the expansion of the old pipeline 61 and the laying of the new pipeline 62 synchronously, and can conveniently perform the in-situ replacement of the new pipeline 62 on the premise of performing ground excavation, so that the replacement device has good use effect, improves the replacement speed of the new pipeline 62, and simplifies the replacement process.

When pushing the new pipeline 62, the pipe guiding device 3 is utilized to pull and drive the front end of the new pipeline 62, and meanwhile, the pushing device 4 is utilized to push the rear end of the new pipeline 62, so that the pipe laying efficiency of the new pipeline 62 is improved, the resistance in the forward advancing process of the new pipeline 62 can be effectively resisted, and the convenience in laying the new pipeline 62 is improved.

In one possible implementation, referring to fig. 1 to 8, the pipe expanding device 2 includes a taper shaft 21 and a spiral taper sleeve 22, the taper shaft 21 is penetrated in the rear end of the old pipe 61 along the axial direction of the old pipe 61 and protrudes backward from the old pipe 61, the pipe guiding device 3 is connected to the rear end face of the taper shaft 21, and the extension end of the traction device 1 is connected to the front end face of the taper shaft 21 for driving the taper shaft 21 to enter the old pipe 61 forward; the spiral taper sleeve 22 is sleeved on the outer periphery of the taper shaft 21 and is in running fit with the taper shaft 21, and external threads 222 for pressing against the inner peripheral wall of the old pipeline 61 to burst the old pipeline 61 are arranged on the outer peripheral wall of the spiral taper sleeve 22.

In this embodiment, the old pipe 61 is expanded outwards by the cooperation of the taper shaft 21 and the spiral taper sleeve 22, and rolling cooperation is formed between the taper shaft 21 and the spiral taper sleeve 22 as the traction device 1 draws the pipe expansion device 2 forwards. The spiral taper sleeve 22 rotates circumferentially, and under the guiding action of the external thread 222, the spiral taper sleeve can be matched with the traction device 1 to advance forwards along the old pipeline 61, the internal peripheral wall of the pipeline is cut by the external thread 222, effective expansion of the inner wall of the old pipeline 61 is realized, fragments of the old pipeline 61 are dispersed and crushed to the periphery, and a pipe paving hole is formed for installing the new pipeline 62.

In one possible implementation, referring to fig. 1 to 8, the outer periphery of the cone shaft 21 is provided with a ball 23 in rolling fit with the inner wall of the spiral cone sleeve 22, the outer periphery wall of the cone shaft 21 is provided with a first annular groove 211 for embedding the ball 23 and in rolling fit with the ball 23, the inner periphery wall of the spiral cone sleeve 22 is provided with a second annular groove 221 which is arranged in one-to-one correspondence with the first annular groove 211 and in rolling fit with the ball 23, and the cross sections of the first annular groove 211 and the second annular groove 221 are respectively semicircular.

In this embodiment, in order to improve the smoothness of the relative rotation between the spiral cone 22 and the cone shaft 21 when the spiral stack is pushed forward, a ball 23 is provided therebetween.

Specifically, the first ring groove 211 extending circumferentially is provided on the taper shaft 21, the second ring groove 221 extending circumferentially is provided on the inner peripheral wall of the spiral sleeve, the space for installing the ball 23 is enclosed by the first ring groove 211 and the second ring groove 221, so that the ball 23 can smoothly roll in the first ring groove 211 and the second ring groove 221, the spiral taper sleeve 22 can smoothly and circumferentially rotate relative to the taper shaft 21, effective expansion of the old pipeline 61 is realized, and the subsequent laying of the new pipeline 62 is facilitated.

In one possible implementation, referring to fig. 1 to 8, the guiding device 3 includes a tapered guiding seat 31 and a plurality of matching tapered blocks 32, the tapered guiding seat 31 is connected to the rear end of the tapered shaft 21, and the diameter of the tapered guiding seat 31 gradually increases from front to back; the plurality of matching cone blocks 32 are distributed at intervals along the circumference of the cone-shaped guide seat 31 at the periphery of the cone-shaped guide seat 31, and the matching cone blocks 32 can be driven by the forward movement of the cone-shaped guide seat 31 to move backwards to be propped against the inner peripheral wall of the new pipeline 62 and drive the new pipeline 62 to move forwards to be paved in the pipe paving hole.

In this embodiment, in the process of driving the new pipe 62 to be laid forward by using the pipe guiding device 3, the outer peripheral wall of the tapered guiding seat 31 can be pressed against the inner peripheral wall of the new pipe 62 by the axial sliding between the tapered guiding seat 31 and the matched tapered block 32, so as to keep the axial positions of the pipe guiding device 3 and the new pipe 62 stable, and avoid the pipe guiding device 3 from falling out from the front end of the new pipe 62, thereby forming effective traction for the front end of the new pipe 62.

The sliding groove 33 on the outer peripheral wall of the conical guide seat 31 is in sliding fit with the sliding block 34 on the matching conical block 32. The limitation of the circumferential positions of the two is realized, the two are circumferentially limited, and meanwhile, the axial displacement is realized, so that the matched cone block 32 can relatively move backwards and abut against and tightly press the inner circumferential wall of the new pipeline 62 in the forward moving process of the cone-shaped guide seat 31, and the effective locking of the axial position of the new pipeline 62 is realized.

Specifically, because the radian of the front end and the rear end of the axis of the conical guide seat 31 are different, in order to enable the matched conical seat to smoothly move backwards to the rear end of the conical guide seat 31, the radian of the inner wall of the matched conical seat is set to be consistent with the radian of the rear end of the conical guide seat 31, when the matched conical seat is close to the front end of the conical guide seat 31, a certain gap can be formed between the inner wall of the matched conical seat and the outer wall of the conical guide seat 31, and a good guiding effect is formed by utilizing the sliding fit effect of the sliding groove 33 and the sliding block 34. The sliding groove 33 can be set to a larger depth, and the sliding block 34 is provided with a larger protrusion height, so that effective contact between the sliding block and the sliding block is ensured, and further sliding fit is ensured.

In some embodiments, referring to fig. 1 to 8, a sliding groove 33 extending along a bus is formed on an outer peripheral wall of the tapered guide seat 31, a sliding block 34 extending along the bus is formed on an inner peripheral wall of the mating tapered block 32, and the sliding block 34 is slidably connected in the sliding groove 33 to guide the tapered guide seat 31 and the mating tapered block 32 to move in opposite directions and expand the mating tapered block 32 in the new pipe 62.

In this embodiment, the limiting end disc 35 at the rear end of the conical guide seat 31 can limit the axial position of the matched conical block 32, so as to avoid the backward movement of the matched conical block 32 from falling out, and ensure the abutting action of the matched conical block 32 on the inner wall of the new pipeline 62 to match the traction movement of the traction device 1.

Specifically, the rear end of the conical guide seat 31 is connected with a limiting end disc 35, and the plate surface of the limiting end disc 35 is perpendicular to the main shaft of the conical guide seat 31 and is used for limiting the axial displacement of the sliding block 34.

In one possible implementation, referring to fig. 1 to 8, a traction hole 212 is provided on the front end surface of the pipe expanding device 2, the opening size of the traction hole 212 is smaller than the inner cavity size, and the traction device 1 includes a traction disc 11, a traction rope 12, two fixed pulleys 13 and a hoist 14: the traction disk 11 is installed in the traction hole 212; traction rope 12 the rear end of traction rope 12 is connected to the front end face of traction disk 11; the two fixed pulleys 13 are respectively arranged in the receiving well 52 and above the receiving well 52 and are used for guiding the traction rope 12 to change direction; the winch 14 is connected with the front end of the hauling rope 12 and is used for driving the hauling rope 12 to move forward so as to expand the old pipeline 61 of the pipe expanding device 2 and pull the new pipeline 62 of the pipe guiding device 3, and the winch 14 is arranged on the front side above the receiving well 52.

In this embodiment, the winch 14 is used to drive the traction rope 12 to move forward, so that the traction disc 11 drives the pipe expansion device 2 to move forward, effective expansion of the old pipe 61 is achieved, meanwhile, the pipe expansion device 3 can form traction action on the new pipe 62 under the drive of the pipe expansion device 2, the old pipe 61 is removed and the new pipe 62 is paved synchronously, and reduction of the crushing efficiency of the old pipe 61 and the paving difficulty of the new pipe 62 are facilitated.

Specifically, the two fixed pulleys 13 are respectively positioned at the bottom and above the receiving well 52, and can guide the direction of the traction rope 12, so that the hoisting force of the hoisting machine 14 is smoothly transmitted to the traction disc 11, and the driving effect of the pipe expanding device 2 and the pipe guiding device 3 is further realized.

In one possible implementation, referring to fig. 1 to 8, the pushing device 4 includes a mounting seat 41, a pushing member 42 and a pushing disc 43, where the mounting seat 41 is mounted in the sending well 51 and is disposed adjacent to a side wall of the mounting well away from the receiving well 52; the pushing piece 42 is connected to the mounting seat 41, and the pushing piece 42 is provided with a pushing end extending to one side of the receiving well 52, wherein the pushing end is of a frustum structure with the outer diameter gradually reduced from front to back; the pushing disc 43 is connected to the pushing end and sleeved on the rear side of the new pipeline 62, the pushing disc 43 is provided with a conical peripheral wall which gradually inclines towards the outer periphery from front to back, the conical peripheral wall is used for being abutted with the inner peripheral wall of the pipe laying hole to guide the new pipeline 62 to be pushed forward, the pushing disc 43 is provided with a conical hole 44 for accommodating the pushing end, and the outer peripheral wall of the pushing end can be abutted against the inner peripheral wall of the conical hole 44 to push the pushing disc 43 and the new pipeline 62 forward;

the front side surface of the pushing disc 43 is provided with an annular groove 45 concavely arranged to accommodate the rear end of the new pipeline 62, and two side walls of the annular groove 45 are respectively provided with a flexible layer 46 in contact fit with the inner wall and the outer wall of the new pipeline 62.

In this embodiment, the installation of the pushing component is performed through the installation seat 41 arranged in the sending well 51, the pushing component applies force to the pushing disc 43 by means of the pushing end, so that the pushing disc 43 pushes the new pipeline 62 to enter the pipe paving hole, the annular groove 45 arranged on the front end surface of the pushing disc 43 can effectively accommodate the rear end of the new pipeline 62, the contact area between the pushing disc 43 and the new pipeline 62 is increased, the uniform distribution of pushing force is realized, in addition, the rear end of the new pipeline 62 can be effectively protected, structural damage caused by uneven local stress at the rear end of the new pipeline 62 is avoided, and the connection tightness between the subsequent new pipelines 62 is further ensured.

Specifically, the frustum structure of the pushing end can form a reliable abutting and matching action with the tapered hole 44 of the pushing disc 43, so that the contact area between the pushing end and the pushing disc 43 is increased, the pushing force of the pushing end is uniformly transmitted to the pushing disc 43, the effective distribution of force is realized, and the peripheral wall of the new pipeline 62 is effectively protected.

The flexible layers 46 on the two side walls of the annular groove 45 can respectively abut against the inner peripheral wall and the outer peripheral wall of the rear end of the new pipeline 62, so that the effect of coating the inner side and the outer side of the rear end of the new pipeline 62 is achieved. When the pushing disc 43 pushes the rear end of the new pipeline 62, the flexible layer 46 can effectively protect the rear end of the new pipeline 62, so that structural damage of the new pipeline 62 caused by uneven stress is avoided, and the reliability of connection between the subsequent adjacent new pipelines 62 is improved.

Further, since the circular arc chamfer is arranged between the rear end face and the peripheral wall of the new pipeline 62, the rear edge of the flexible layer 46 extends to the bottom wall of the annular groove 45 so as to be attached to the outer ring part of the rear end face of the new pipeline 62, thereby effectively protecting the rear end face of the new pipeline 62 and ensuring the overall structural strength of the new pipeline 62.

On the basis, the inner wall of the rear end of the new pipeline 62 is provided with an arc-shaped structure, and the front end surface of the pushing disc 43 is provided with a pushing ring 431 in contact fit with the arc-shaped structure, so that the stress area between the pushing disc 43 and the new pipeline 62 is increased, and the pushing efficiency is improved.

In some embodiments, referring to fig. 1 to 8, a plurality of rib plates 47 are circumferentially arranged at intervals on the rear side surface of the pushing disc 43, a connecting ring 48 coaxially arranged with the pushing disc 43 is connected to the rear side of the rib plates 47, the front side surface of the connecting ring 48 is fixedly connected with the rear end surface of the rib plates 47, the rib plates 47 are located at the periphery of the conical holes 44, and the width of the rear side of the rib plates 47 is gradually reduced.

In this embodiment, the rib plate 47 disposed on the rear side of the pushing disc 43 can enhance the overall structure of the pushing disc 43. Further, the connecting rings 48 connected to the rear sides of the rib plates 47 can effectively connect the rear end faces of the rib plates 47 to form a unified whole, so that the overall structural strength of the pushing disc 43 is improved.

Specifically, the pushing component adopts a structure of a hydraulic cylinder, a vertical plate connected to the output end of the hydraulic cylinder and a push rod 49 connected to the front side of the vertical plate. The outer end of the push rod 49 forms a pushing end, the connecting ring 48 is sleeved on the outer ring of the push rod 49, a gap is reserved between the inner ring of the connecting ring 48 and the outer peripheral wall of the push rod 49, and the rib plate 47 can be assisted to form a structural reinforcing effect on the pushing disc 43.

Based on the same inventive concept, the embodiment of the application also provides a non-excavation pipeline in-situ replacement method for pipeline replacement by using non-excavation pipeline in-situ replacement equipment, which comprises the following steps:

installing the pulling apparatus 1 to the receiving well 52 with the extension end of the pulling apparatus 1 extending through the old pipe 61 to the rear end of the old pipe 61;

installing the pipe expanding device 2 and the pipe guiding device 3 to the rear end of the old pipe 61, connecting the traction device 1 and the pipe guiding device 3, installing the new pipe 62 into the sending well 51, and enabling the traction device 1 to enter the front end of the new pipe 62;

installing the pushing device 4 into the sending well 51 and installing the pushing disc 43 to the rear end of the new pipeline 62, so that the pushing end stretches into the conical hole 44 of the pushing disc 43;

starting a winch 14 and a pushing device 4, pulling the pipe expanding device 2 to move forwards by using a pulling rope 12, enabling the spiral taper sleeve 22 to rotate circumferentially relative to the taper shaft 21 so as to expand the old pipe 61, enabling the taper guide seat 31 to move forwards along with the taper shaft 21, enabling the matched taper block 32 to move backwards relative to the taper guide seat 31 and abut against the inner peripheral wall of the new pipe 62 so as to enable the new pipe 62 to move forwards along with the pipe expanding device 3; meanwhile, the pushing disc 43 can be matched with the guide tube device 3 to drive the new pipeline 62 to move forward under the action of the pushing end.

Compared with the prior art, the trenchless pipeline in-situ replacement equipment provided by the embodiment drives the pipe expanding device 2 to move forwards by using the traction device 1 to realize effective expansion of the old pipeline 61, and utilizes the pipe guiding device 3 at the rear end of the pipe expanding device 2 to pull the new pipeline 62 forwards and assist the pushing device 4 to push the rear end of the new pipeline 62, so that the forward moving speed of the new pipeline 62 can be improved, the effective laying of the new pipeline 62 is ensured, the operation difficulty of replacing the new pipeline 62 is reduced, the in-situ replacement of the new pipeline 62 is realized, and the laying efficiency of the new pipeline 62 is improved.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (10)

1. Non-excavation pipeline normal position changes equipment, its characterized in that includes:

the traction device is arranged above the receiving well and extends downwards into the old pipeline;

the pipe expanding device is connected to the extending end of the traction device and is arranged close to the rear end of the old pipeline, and is used for propping the old pipeline towards the periphery to expand the old pipeline and form a pipe paving hole;

the pipe guiding device is connected to the rear end of the pipe expanding device and positioned in the new pipeline and used for driving the new pipeline to move forward so as to be laid in the pipe laying hole;

the pushing device is arranged in the sending well and used for pushing the rear end of the new pipeline to drive the new pipeline to move forward by matching with the pipe guiding device.

2. The trenchless pipeline in-situ replacement apparatus of claim 1 wherein said pipe expansion device comprises:

the taper shaft penetrates through the rear end of the old pipeline along the axial direction of the old pipeline and protrudes out of the old pipeline backwards, the guide pipe device is connected to the rear end face of the taper shaft, and the extension end of the traction device is connected to the front end face of the taper shaft and is used for driving the taper shaft to enter the old pipeline forwards;

the spiral taper sleeve is sleeved on the periphery of the taper shaft and is in running fit with the taper shaft, and external threads used for propping against the inner peripheral wall of the old pipeline to burst the old pipeline are arranged on the peripheral wall of the spiral taper sleeve.

3. The trenchless pipeline in-situ replacement apparatus of claim 2 wherein balls in rolling fit with an inner wall of the spiral taper sleeve are arranged on an outer periphery of the taper shaft, first annular grooves for embedding the balls and in rolling fit with the balls are arranged on an outer periphery wall of the taper shaft, second annular grooves which are arranged in one-to-one correspondence with the first annular grooves and in rolling fit with the balls are arranged on an inner periphery wall of the spiral taper sleeve, and cross sections of the first annular grooves and the second annular grooves are semicircular respectively.

4. The trenchless pipeline in situ replacement apparatus of claim 2 wherein said guide tube assembly comprises:

the conical guide seat is connected to the rear end of the conical shaft, and the diameter of the conical guide seat is gradually increased from front to back;

the plurality of matched cone blocks are arranged on the periphery of the conical guide seat at intervals along the circumferential direction of the conical guide seat, and can move backwards under the drive of the forward movement of the conical guide seat so as to be propped against the inner peripheral wall of a new pipeline and drive the new pipeline to move forwards so as to be laid in the pipe laying hole.

5. The trenchless pipeline in-situ replacement apparatus of claim 4 wherein a slip groove extending along a bus is formed in an outer peripheral wall of the tapered guide, and a slip block extending along a bus is formed in an inner peripheral wall of the mating tapered block, the slip block being slidably coupled within the slip groove to guide the tapered guide and the mating tapered block to move in opposite directions and expand the mating tapered block within a new pipeline.

6. The trenchless pipeline in-situ replacement apparatus of claim 5 wherein a rear end of the tapered guide is connected to a limiting end plate, the plate surface of the limiting end plate being perpendicular to the main axis of the tapered guide for limiting axial displacement of the sliding block.

7. The trenchless pipeline in-situ replacement apparatus of claim 1 wherein the expansion device has a pulling hole on a front face thereof, the pulling hole having an opening size smaller than a size of the inner cavity, the pulling device comprising:

the traction disc is arranged in the traction hole;

the rear end of the traction rope is connected to the front end face of the traction disc;

the two fixed pulleys are respectively arranged in the receiving well and above the receiving well and are used for guiding the traction rope to change direction;

and the winch is connected with the front end of the traction rope and is used for driving the traction rope to move forward so as to enable the pipe expanding device to expand the old pipe and enable the pipe guiding device to drag the new pipe, and the winch is arranged on the front side above the receiving well.

8. The trenchless pipeline in situ replacement apparatus of any of claims 1-7 wherein the thrusters comprise:

the mounting seat is arranged in the sending well and is adjacently arranged with a side wall of the mounting well far away from the receiving well;

the pushing piece is connected to the mounting seat and is provided with a pushing end extending to one side of the receiving well, and the pushing end is of a frustum structure with the outer diameter gradually reduced from front to back;

the pushing disc is connected to the pushing end and sleeved on the rear side of the new pipeline, the pushing disc is provided with a conical peripheral wall which is gradually inclined towards the periphery from front to back, the conical peripheral wall is used for being abutted with the inner peripheral wall of the pipe laying hole to guide the new pipeline to be pushed forward, the pushing disc is provided with a conical hole for accommodating the pushing end, and the outer peripheral wall of the pushing end can be abutted against the inner peripheral wall of the conical hole to push the pushing disc and the new pipeline forward;

the front side surface of the pushing disc is provided with an annular groove which is concavely arranged to accommodate the rear end of the new pipeline, and two side walls of the annular groove are respectively provided with a flexible layer which is in contact fit with the inner wall and the outer wall of the new pipeline.

9. The trenchless pipeline in-situ replacement equipment of claim 8, wherein a plurality of rib plates are circumferentially arranged at intervals on the rear side surface of the pushing disc, a connecting ring coaxially arranged with the pushing disc is connected to the rear side of the rib plates, the front side surface of the connecting ring is fixedly connected with the rear end surface of the rib plates, the rib plates are positioned on the periphery of the conical hole, and the width of the rear side of the rib plates is gradually reduced.

10. A non-excavation pipeline in-situ replacement method for pipeline replacement using the non-excavation pipeline in-situ replacement apparatus as claimed in any one of claims 1 to 9, comprising the steps of:

installing a traction device to the receiving well, and enabling the extension end of the traction device to extend to the rear end of the old pipeline by penetrating the old pipeline;

installing the pipe expanding device and the pipe guiding device to the rear end of the old pipe, connecting the traction device and the pipe guiding device, installing a new pipe into the sending well, and enabling the traction device to enter the front end of the new pipe;

installing a pushing device into the sending well, and installing a pushing disc to the rear end of the new pipeline, so that the pushing end stretches into the conical hole of the pushing disc;

starting a winch and a pushing device, pulling the pipe expanding device to move forwards by using a pulling rope, enabling a spiral taper sleeve to rotate circumferentially relative to a taper shaft so as to expand an old pipe, enabling a taper guiding seat to move forwards along with the taper shaft, enabling a matched taper block to move backwards relative to the taper guiding seat and be abutted and pressed on the inner peripheral wall of a new pipe, and enabling the new pipe to move forwards along with the pipe expanding device; meanwhile, the pushing disc can be matched with the tube guiding device to drive a new pipeline to move forwards under the action of the pushing end.