CN216305926U - Pipeline normal position replacement tunneling device - Google Patents

Abstract

The utility model provides a pipeline in-situ replacement tunneling device which comprises a shield body, wherein the shield body is of a cylindrical structure and is used for being sleeved outside an old pipe joint in a guiding manner, a cutting edge used for tunneling forwards in a soil layer is arranged at the front end of the shield body, and a jacking end face used for being in jacking press fit with a propelling device or a new pipe joint is arranged at the rear end of the shield body. The tunneling device has the advantages that the cutting edge at the front end of the shield body is utilized to tunnel forwards in the soil layer, the tunneling device is simple in integral structure, convenient to machine and manufacture and low in manufacturing difficulty, complex structures such as a pipe-inserting cutter head, a main drive, a muddy water cabin, a slurry discharge system and a grouting system in the prior art are omitted, construction is more convenient, and the influence on the soil layer can be reduced due to the fact that large-area soil layer cutting is not carried out.

Description

Pipeline normal position replacement tunneling device

Technical Field

The utility model relates to the technical field of old pipeline replacement construction devices, in particular to a pipeline in-situ replacement tunneling device.

Background

In the prior art, when urban underground waste pipelines are updated, open excavation and non-excavation restoration construction modes are often adopted. The open cut method is adopted for pipeline construction, so that the construction efficiency is low, and the surrounding environment is greatly influenced in the construction process.

In view of the above, a common solution at present is to design a new method for a trenchless pipeline renovation construction system, for example, an immersed tube pipeline renovation heading machine and a construction method disclosed in the chinese patent application with application publication No. CN112483104A, where the immersed tube pipeline renovation heading machine includes a main machine and a propulsion device, an immersed tube cutter head and a mud-water cabin are sequentially arranged at the front of the main machine, the immersed tube cutter head is hollow, and the old pipeline is immersed in the main machine by cutting the peripheral soil layer of the old pipeline, so as to realize propulsion of the heading machine. The pipe-feeding cutter head and the host are internally provided with central channels for old pipelines to pass through, and the muddy water cabin is connected with a slurry discharge system and a slurry injection system.

The heading machine can realize pipe feeding by cutting soil with a certain thickness outside the pipe wall of the old pipeline, so that a pipe feeding cutter head, a main drive, a mud tank, a slurry discharge system and a grouting system are required to be arranged, and the heading machine has the disadvantages of very complicated equipment structure, high manufacturing difficulty and high manufacturing cost. In addition, the soil layer structure can be influenced by cutting the soil layer outside the old pipeline in a large area.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pipeline in-situ replacement tunneling device which is simple in structure, low in manufacturing difficulty and capable of reducing the influence on soil layers.

In order to achieve the purpose, the pipeline in-situ replacement tunneling device adopts the following technical scheme:

the utility model provides a tunnelling device is changed to pipeline normal position, includes the shield body, and the shield body is the tubular structure for the outside at old tube coupling is established to the direction cover, and the front end of shield body is provided with the blade that is used for advancing in the soil layer, and the rear end of shield body is provided with the roof pressure terminal surface that is used for with advancing device or new tube coupling top press fit.

The beneficial effects of the above technical scheme are that: the rear end of the shield body is provided with a jacking end face which can be in press fit with the top of the propelling device or the new pipe joint, and the front end of the shield body is provided with a cutting edge, so that under the power action of the propelling device, the shield body can be driven forwards in a soil layer through the cutting edge, and old pipe joints are sunk into an inner hole of the shield body. Meanwhile, the shield body is of a cylindrical structure, and the guide sleeve is arranged outside the old pipe joint, so that the advancing direction is ensured. The tunneling device is simple in overall structure, convenient to machine and manufacture and low in manufacturing difficulty, complex structures such as a pipe-feeding cutter head, a main drive, a muddy water cabin, a slurry discharge system and a grouting system in the prior art are omitted, construction is more convenient, and influences on soil layers can be reduced due to the fact that large-area soil layer cutting is not carried out.

Further, a contact body used for being in contact with the outer wall of the old pipe joint to guide the shield body is arranged on the inner wall of the shield body.

The beneficial effects of the above technical scheme are that: the contact body is arranged to guide the shield body conveniently.

Further, be fixed with the fixed plate that length extends along the fore-and-aft direction on the inner wall of the shield body, the fixed plate is equipped with a plurality ofly and follows the circumference interval distribution of the shield body, the contact is for installing the gyro wheel on the fixed plate, and the gyro wheel on each fixed plate all has a plurality ofly and follows fore-and-aft direction interval arrangement.

The beneficial effects of the above technical scheme are that: the roller is used as a contact body, so that friction between the roller and an old pipe joint can be reduced, and the fixed plate is arranged on the inner wall of the shield body, so that the roller is convenient to install.

Furthermore, guard plates are respectively and vertically fixed on the front side and the rear side of each roller on the fixing plate.

The beneficial effects of the above technical scheme are that: the roller is protected.

Furthermore, the front end face of the fixing plate is an inclined plane which is gradually close to the center of the shield body from front to back.

The beneficial effects of the above technical scheme are that: can play the corrective action, can reset the pipeline that has the stagger to the shield body to a certain extent.

Furthermore, an annular end plate is fixed at the rear end of the shield body, a conical cylinder body is fixed between the annular end plate and the inner wall of the shield body, and the inner wall surface of the conical cylinder body forms a soil blocking surface.

The beneficial effects of the above technical scheme are that: the soil is prevented from reaching the rear side of the shield body.

Furthermore, a reinforcing plate is fixed between the conical cylinder and the annular end plate as well as between the conical cylinder and the inner wall of the shield body.

The beneficial effects of the above technical scheme are that: the structural strength can be improved.

Furthermore, the front end of the inner wall of the shield body is provided with a soil retaining brush.

The beneficial effects of the above technical scheme are that: the soil is prevented from entering the shield body.

Furthermore, the pipeline in-situ replacement tunneling device also comprises an old pipe separating device which is independently arranged in an old pipe joint, the old pipe separating device comprises a first radial jacking mechanism, a second radial jacking mechanism and an axial telescopic rod connected between the two radial jacking mechanisms, the first radial jacking mechanism comprises a first connecting seat and at least two first telescopic rods which are circumferentially installed on the first connecting seat at intervals, the end part of each first telescopic rod is connected with a first supporting cushion block, and the first supporting cushion block is used for jacking the inner wall of the old pipe joint after the first telescopic rods extend along the radial direction of the old pipe joint; the second radial jacking mechanism comprises a second connecting seat and at least two second telescopic rods arranged on the second connecting seat at intervals along the circumferential direction, the end parts of the second telescopic rods are connected with second supporting cushion blocks, and the second supporting cushion blocks are used for jacking the inner walls of the adjacent old pipe joints after the second telescopic rods extend along the radial direction of the adjacent old pipe joints.

The beneficial effects of the above technical scheme are that: one set of excavating device is formed by the old pipe separating device and the shield body, the shield body can be assisted to excavate and split the old pipe joints, two radial jacking mechanisms of the old pipe separating device respectively jack the inner walls of two adjacent old pipe joints, then the separation of the two old pipe joints can be realized by the extension of the axial telescopic rod, the splitting is more convenient, the construction efficiency is high, and the old pipe separating device is independently arranged in the old pipe joints, so that the space of an originating well is not occupied.

Furthermore, the first supporting cushion block is hinged with the first telescopic rod, and the first radial jacking mechanism further comprises a first sleeve fixedly connected with the first connecting seat, a first inserting rod in inserting fit with the first sleeve, and a first transmission rod hinged between the first inserting rod and the first supporting cushion block; the second radial jacking mechanism also comprises a second sleeve fixedly connected with the second connecting seat, a second insertion rod in insertion fit with the second sleeve, and a second dowel bar hinged between the second insertion rod and the second supporting cushion block; the axial telescopic rod is connected between the first inserted bar and the second inserted bar.

The beneficial effects of the above technical scheme are that: the two radial jacking mechanisms can be more stable through the dowel bars, and the old pipe joints can be conveniently disassembled.

Drawings

Fig. 1 is a structural view of an embodiment 1 of the in-situ pipeline replacement tunneling device according to the present invention;

fig. 2 is a schematic diagram of a construction preparation state of an embodiment 1 of the pipeline in-situ replacement tunneling device in the utility model when in use;

FIG. 3 is a schematic view of a working well construction state when the pipe in-situ replacement tunneling device according to embodiment 1 of the utility model is in use;

fig. 4 is a schematic view of the installation state of the excavating equipment in use according to embodiment 1 of the in-situ pipeline replacement excavating device;

FIG. 5 is a schematic diagram of the jacking construction state of the pipe in-situ replacement tunneling device in the embodiment 1 of the utility model when in use;

FIG. 6 is a cross-sectional view of the cart portion of the tube transport cart of FIG. 5;

fig. 7 is a schematic view of a receiving state of the tunneling device in use according to embodiment 1 of the in-situ pipeline replacement tunneling device;

fig. 8 is a schematic view of a construction state of an inspection well when the pipe in-situ replacement tunneling device in embodiment 1 of the utility model is in use;

fig. 9 is a schematic diagram of a new planned well built in the embodiment 1 of the in-situ pipeline replacement tunneling device in the utility model when in use;

FIG. 10 is an enlarged view of the old pipe separation unit of FIG. 5;

FIG. 11 is a cross-sectional view of the portion of the old pipe separator device of FIG. 5;

fig. 12 is a structural view of an embodiment 2 of the pipe in-situ replacement heading device according to the present invention.

In the figure: 100. a tunneling device; 200. a propulsion device; 300. an old pipe separating device; 400. a pipe conveying trolley; 500. a crane; 1. a shield body; 1-1, cutting edge; 2. a fixing plate; 3. a roller; 4. a guard plate; 5. an annular end plate; 6. a conical cylinder; 7. a reinforcing plate; 8. a soil retaining brush; 9. an old pipeline; 10. an existing well; 11. an originating well; 12. a receiving well; 13. old pipe joints; 14. a new pipe section; 15. special pipe joints; 16. an inspection well; 17. newly building a well; 18. a first connecting seat; 19. a first telescopic rod; 20. a first bolster block; 21. a first transfer lever; 22. a first sleeve; 23. a first small diameter rod; 24. a first large-diameter rod; 25. an axial telescopic rod; 26. a second connecting seat; 27. a second telescopic rod; 28. a second bolster block; 29. a second dowel bar; 30. a second sleeve; 31. a second small-diameter rod; 32. a second large-diameter rod; 33. and supporting the trolley.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …," or the like, does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

An embodiment 1 of the pipeline in-situ replacement tunneling device (hereinafter referred to as a tunneling device) in the utility model is shown in fig. 1, and comprises a shield body 1, wherein the shield body 1 is of a cylindrical structure and is used for being sleeved outside an old pipe joint in a guiding manner, the front end of the shield body 1 is provided with a cutting edge 1-1 used for tunneling forwards in a soil layer, and the rear end of the shield body 1 is provided with a jacking end surface used for being in press fit with a propelling device or the top of a new pipe joint, so that under the power action of the propelling device, the shield body 1 can tunnel forwards in the soil layer through the cutting edge and the old pipe joint is sunk into an inner hole of the shield body 1.

A plurality of contact bodies used for contacting with the outer wall of the old pipe joint to guide the shield body are arranged on the inner wall of the shield body 1 along the circumferential direction, so that the position of the shield body 1 can be positioned, and the advancing direction is ensured. Specifically, be fixed with length along the fixed plate 2 that the fore-and-aft direction extends on the inner wall of the shield body 1, fixed plate 2 is equipped with a plurality ofly and follows the circumference equipartition of the shield body 1, above-mentioned contact for install gyro wheel 3 on fixed plate 2, can reduce and old tube coupling between the frictional force, gyro wheel 3 on each fixed plate 2 all has a plurality ofly and follows fore-and-aft direction interval arrangement. Guard plates 4 are respectively and vertically fixed on the front side and the rear side of each roller 3 on the fixing plate 2, and can protect the rollers 3. The front end face of the fixing plate 2 is an inclined plane which is gradually close to the center of the shield body 1 from front to back, can play a role in correction, and can reset a pipeline with a gap to the shield body 1 to a certain extent.

In addition, a soil retaining structure is also mounted on the inner wall of the shield body 1. In this embodiment, the soil retaining structure comprises a ring-shaped end plate 5 fixed to the rear end of the shield body 1 and a cone-shaped cylinder 6 fixed between the ring-shaped end plate 5 and the inner wall of the shield body 1, the rear end face of the ring-shaped end plate 5 constitutes the above-mentioned top end face, and the inner wall face of the cone-shaped cylinder 6 constitutes a soil retaining face, from which soil can be prevented from reaching the rear side of the shield body. And a reinforcing plate 7 is fixed between the conical cylinder 6 and the annular end plate 5 and the inner wall of the shield body 1 for improving the structural strength.

The using process of the tunneling device specifically comprises the following steps:

firstly, as shown in figure 2, determining a pipeline in-situ breaking and updating construction section, and guiding sewage at two ends of an old pipeline 9; then, as shown in fig. 3, after the positions of the originating well 11 and the receiving well 12 are determined, the working well construction is performed, and the construction of the originating well 11 and the receiving well 12 can adopt a method of sinking a steel casing on the basis of the existing well 10, so that the influence of the construction on the surrounding environment is reduced, and the construction cost of the working well is reduced.

Step two, mounting tunneling equipment: as shown in fig. 4, the heading device 100 and the propulsion device 200 are installed after being hung into the starting well 11. The heading device 100 is the heading device described above.

Step three, jacking construction: the heading device 100 is advanced along the planned route by the propelling device 200. As shown in fig. 4 and 5, the advancing force is applied to the shield body 1 of the tunneling device 100 by the advancing device 200, the cutting edge at the front end of the shield body 1 is used to tunnel forward in the soil, and the old pipe joint 13 is inserted into the inner hole of the shield body 1.

Step four, dismantling the old pipe joints: the old pipe section 13 which is eaten into the shield body 1 is removed and transported out of the well.

And step five, hanging the new pipe joint 14, and jacking the new pipe joint 14 between the propelling device 200 and the shield body 1.

And step six, repeating the step three, the step four and the step five, and gradually completing jacking construction of the tunneling device, dismantling of the old pipeline and installation of the new pipeline.

Wherein, in the first step (three), the propelling device 200 is used to directly push the rear end of the shield body 1 (as shown in fig. 4) and apply a forward force to the shield body 1, and in the subsequent step (three), the propelling device 200 indirectly pushes the rear end of the shield body 1 through the new pipe joint 14 (as shown in fig. 5). In the fourth step, when the old pipe joint 13 is dismantled, only one section of the old pipe joint 13 at the outermost side is dismantled each time. In the fifth step, when a new pipe joint 14 is hoisted, only one new pipe joint 14 is hoisted each time.

In addition, as shown in fig. 5, the heading device of the present invention further includes an old pipe separating device 300 for being separately disposed in the old pipe sections 13, the old pipe separating device 300 is used for separating two adjacent old pipe sections 13, and the separated old pipe sections 13 are transported to the originating well 11 by a pipe transporting trolley 400 (shown in fig. 6) and then lifted out by a crane 500. Likewise, a new pipe section 14 is also hoisted into the originating well by crane 500.

Step seven, the equipment receives: as shown in fig. 7, the ripper device 100 is ejected at the receiving well 12, the door is sealed, the ripper device 100 is transported out of the receiving well, the pusher device 200 is transported out of the originating well, and other equipment is transported out of the nearby well.

Step eight, constructing an inspection well: as shown in fig. 8, after the equipment is removed and hoisted, a manhole 16 is built at the location of the originating well 11 and the receiving well 12.

Step nine, building a new planning well: as shown in fig. 9, the abandoned well is backfilled and a planned new well 17 is built. In order to facilitate the construction of the newly constructed well 17, during the pipeline renovation process, as the new pipe section 14 is pushed in, as shown in fig. 7, the detachable special pipe section 15 can be pushed in at the planned position, so that the newly constructed well 17 can be constructed at the position after the pipeline renovation construction is finished.

The tunneling device 100 disclosed by the utility model utilizes the cutting edge at the front end of the shield body to tunnel forwards in the soil layer, has a simple overall structure, is convenient to process and manufacture, has low manufacturing difficulty, omits complex structures such as a pipe-inserting cutter head, a main drive, a muddy water cabin, a slurry discharge system and a grouting system in the prior art, is more convenient to construct, and can reduce the influence on the soil layer because large-area soil layer cutting is not carried out. In the pipeline renovation construction, the old pipe joint 13 is dismantled by the old pipe separating device 300, the old pipe joint 13 is conveyed into a working well by the pipe conveying trolley 400, and the whole construction process has high mechanization degree.

The specific structure of the used pipe separating device 300 is shown in fig. 10 and 11, and includes a first radial tightening mechanism, a second radial tightening mechanism, and an axial expansion rod 25 connected between the two radial tightening mechanisms. First radial tight mechanism in top includes first connecting seat 18 and follows four first telescopic links 19 of circumference interval installation on first connecting seat 18, and first telescopic link 19 specifically is pneumatic cylinder, cylinder or electric push rod, and the tip of first telescopic link 19 articulates there is first supporting pad 20, and first telescopic link 19 is followed the radial extension of old tube coupling back through the inner wall of first supporting pad 20 top tight old tube coupling, is provided with the rubber pad on the first supporting pad 20. The first radial jacking mechanism further comprises a first sleeve 22 fixedly connected with the first connecting seat 18 and a first inserted bar matched with the first sleeve 22 in an inserted manner, the first inserted bar comprises a first small-diameter bar 23 and a first large-diameter bar 24, the first small-diameter bar 23 is inserted into the first sleeve 22, and a first transmission rod 21 is hinged between the first large-diameter bar 24 and the first supporting cushion block 20.

The structure of the second radial jacking mechanism is the same as that of the first radial jacking mechanism, and comprises a second connecting seat 26 and four second telescopic rods 27 which are arranged on the second connecting seat 26 at intervals along the circumferential direction, the second telescopic rods 27 are specifically hydraulic cylinders, air cylinders or electric push rods, the end parts of the second telescopic rods 27 are hinged to second supporting cushion blocks 28, and rubber pads are also arranged on the second supporting cushion blocks 28. The second radial jacking mechanism further comprises a second sleeve 30 fixedly connected with the second connecting seat 26 and a second inserted bar in inserting fit with the second sleeve 30, the second inserted bar comprises a second small-diameter bar 31 and a second large-diameter bar 32, the second small-diameter bar 31 is inserted into the second sleeve 30, and a second dowel bar 29 is hinged between the second large-diameter bar 32 and the second supporting cushion block 28.

The axial expansion link 25 is also a hydraulic cylinder, an air cylinder or an electric push rod (the axial expansion link 25, the second expansion link 27 and the first expansion link 19 in the drawings are schematic diagrams and do not represent actual shapes and structures), and one end of the axial expansion link is connected with the first large-diameter rod 24, and the other end of the axial expansion link is connected with the second large-diameter rod 32. During the use, through the extension of first telescopic link 19, the extension of second telescopic link 27, and the synchronous cooperation extension of axial telescopic link 25, first supporting pad 20 and second supporting pad 28 can push up the inner wall of two adjacent old tube couplings 13 respectively, then through the continuation extension of axial telescopic link 25, the radial tight mechanism in top that relatively leans on outward (i.e. leans on the back) can drive by the tight old tube coupling in top keep away from by the old tube coupling that leans on the lining (i.e. lean on before), accomplish the separation of two adjacent old tube couplings. In addition, in order to facilitate the installation and movement of the used pipe separating device 300, the used pipe separating device 300 further includes a supporting trolley 33 in supporting connection with the axial telescopic rod 25, as shown in fig. 11.

As shown in fig. 12, the embodiment 2 of the pipe in-situ replacement tunneling apparatus according to the present invention is different from the embodiment 1 in that the retaining structure on the inner wall of the shield body 1 further includes a retaining brush 8 attached to the front end of the inner wall of the shield body 1.

In other embodiments of the in situ replacement of the ripper device of the pipeline: the first radial jacking mechanism of the old pipe separating device does not comprise a first dowel bar, the first supporting cushion block is fixedly connected with the first telescopic rod, the second radial jacking mechanism does not comprise a second dowel bar, the second supporting cushion block is fixedly connected with the second telescopic rod, and the axial telescopic rod is connected between the first connecting seat and the second connecting seat.

In other embodiments of the in situ replacement of the ripper device of the pipeline: the pipeline in-situ replacement tunneling device does not comprise an old pipe separating device, or the old pipe separating device does not belong to one part of the pipeline in-situ replacement tunneling device but belongs to an independent device; of course, when the old pipe separating device is not included, the hoisting machine can be used as a dragging device, the rope on the hoisting machine is connected with the old pipe joint on the outermost side through the clamp, and the old pipe joint is dragged out like the prior art. In other embodiments of the in situ replacement of the ripper device of the pipeline: the reinforcing plate can not be fixed between the conical cylinder body and the annular end plate and between the conical cylinder body and the inner wall of the shield body.

In other embodiments of the in situ replacement of the ripper device of the pipeline: the retaining brush can be arranged at the front end of the inner wall of the shield body, and the conical barrel is not arranged at the rear end of the shield body any longer.

In other embodiments of the in situ replacement of the ripper device of the pipeline: neither install the fender brush on the inner wall of shield body, also do not fix the toper barrel.

In other embodiments of the in situ replacement of the ripper device of the pipeline: the front end surface of the fixing plate may not be a slope surface, for example, a vertical surface.

In other embodiments of the in situ replacement of the ripper device of the pipeline: the guard plates can also be unfixed on the front side and the rear side of each roller on the fixing plate.

In other embodiments of the in situ replacement of the ripper device of the pipeline: the fixing plate may not extend in the front-rear direction but be a square plate provided only at a position where the roller needs to be installed.

In other embodiments of the in situ replacement of the ripper device of the pipeline: the inner wall of the shield body can be directly processed with a mounting groove for mounting the roller instead of being provided with a fixing plate.

In other embodiments of the in situ replacement of the ripper device of the pipeline: the contact body on the inner wall of the shield body can be not a roller but a ball or a guide rod extending along the front-back direction, and the guide rod is in sliding friction contact with the old pipe joint.

In other embodiments of the in situ replacement of the ripper device of the pipeline: the top pressing end surface of the rear end of the shield body can also be directly formed by the rear end surface of the shield body.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims (10)

1. The in-situ pipeline replacement tunneling device is characterized by comprising a shield body (1), wherein the shield body (1) is of a cylindrical structure and is used for being sleeved outside an old pipe joint (13) in a guiding manner, a cutting edge (1-1) used for tunneling forwards in a soil layer is arranged at the front end of the shield body (1), and a jacking end face used for being in jacking fit with a propelling device or a new pipe joint (14) is arranged at the rear end of the shield body (1).

2. A pipe in-situ replacement tunnelling device as claimed in claim 1, wherein the shield body (1) is provided with contact bodies on its inner wall for contacting the outer wall of an old pipe section (13) to guide the shield body (1).

3. The pipeline in-situ replacement tunneling device according to claim 2, wherein a fixing plate (2) with a length extending in the front-rear direction is fixed on the inner wall of the shield body (1), the fixing plate (2) is provided with a plurality of rollers (3) distributed at intervals along the circumferential direction of the shield body (1), the contact bodies are rollers (3) installed on the fixing plate (2), and the rollers (3) on each fixing plate (2) are arranged at intervals in the front-rear direction.

4. A pipe in-situ replacement tunnelling device according to claim 3, wherein the fixed plate (2) is vertically fixed with a shield plate (4) on each of the front and rear sides of each roller (3).

5. The pipe in-situ replacement tunneling device according to claim 3, wherein the front end face of the fixing plate (2) is an inclined surface gradually approaching the center of the shield body (1) from front to back.

6. The pipeline in-situ replacement tunneling device according to any one of claims 1-5, characterized in that an annular end plate (5) is fixed at the rear end of the shield body (1), a conical cylinder (6) is fixed between the annular end plate (5) and the inner wall of the shield body (1), and the inner wall surface of the conical cylinder (6) forms a soil blocking surface.

7. The pipe in-situ replacement heading device according to claim 6, wherein a reinforcing plate (7) is fixed between the conical cylinder (6) and the annular end plate (5) and the inner wall of the shield body (1).

8. The pipeline in-situ replacement tunneling device according to any one of claims 1-5, characterized in that a soil-retaining brush (8) is mounted at the front end of the inner wall of the shield body (1).

9. The pipeline in-situ replacement tunneling device according to any one of claims 1-5, characterized in that the pipeline in-situ replacement tunneling device further comprises an old pipe separating device for being arranged in the old pipe joint (13) independently, the old pipe separating device comprises a first radial jacking mechanism, a second radial jacking mechanism and an axial telescopic rod (25) connected between the two radial jacking mechanisms, the first radial jacking mechanism comprises a first connecting seat (18) and at least two first telescopic rods (19) arranged on the first connecting seat (18) at intervals along the circumferential direction, the end parts of the first telescopic rods (19) are connected with first supporting cushion blocks (20), and the first supporting cushion blocks (20) are used for jacking the inner wall of the old pipe joint (13) after the first telescopic rods (19) are extended along the radial direction of the old pipe joint (13); the second radial jacking mechanism comprises a second connecting seat (26) and at least two second telescopic rods (27) which are arranged on the second connecting seat (26) at intervals along the circumferential direction, the end parts of the second telescopic rods (27) are connected with second supporting cushion blocks (28), and the second supporting cushion blocks (28) are used for jacking the inner wall of an adjacent old pipe joint (13) after the second telescopic rods (27) extend along the radial direction of the adjacent old pipe joint (13).

10. The pipeline in-situ replacement tunneling device according to claim 9, wherein the first supporting cushion block (20) is hinged to the first telescopic rod (19), the first radial jacking mechanism further comprises a first sleeve (22) fixedly connected to the first connecting seat (18), a first insertion rod in plug fit with the first sleeve (22), and a first transmission rod (21) hinged between the first insertion rod and the first supporting cushion block (20); the second supporting cushion block (28) is hinged with the second telescopic rod (27), the second radial jacking mechanism further comprises a second sleeve (30) fixedly connected with the second connecting seat (26), a second inserting rod in inserting fit with the second sleeve (30), and a second force transmission rod (29) hinged between the second inserting rod and the second supporting cushion block (28); an axially telescoping rod (25) is connected between the first and second rods.

Images