A multifunctional excavation device

Abstract

The present invention provides a multifunctional excavation device, including a shield body, a fixed seat and a slide rail are fixed on the inner wall of the shield body, a movable seat is slidably installed on the slide rail, the movable seat is located at the rear side of the fixed seat, and at least two groups of the fixed seat, the movable seat and the slide rail are arranged along the circumference of the shield body; a first radial telescopic mechanism that can be extended and retracted along the radial direction of the shield body is installed on the fixed seat, which is used to press against the outer wall of the old pipe section on the front side after extension; a second radial telescopic mechanism that can be extended and retracted along the radial direction of the shield body is installed on the movable seat, which is used to press against the outer wall of the old pipe section on the rear side after extension; an axial telescopic mechanism is connected between the fixed seat and the movable seat, which is used to make the second radial telescopic mechanism in the tightened state drive the old pipe section on the rear side to move backward away from the old pipe section on the front side after extension. The pipe removal method of the present invention is simple to operate and has high construction efficiency, and the radial telescopic mechanism and the axial telescopic mechanism are integrated on the shield body, which does not occupy the space of the starting well, so that the shield body can both excavate and remove pipes, realizing multifunctional excavation construction.

Description

Technical Field

[0001] The invention relates to the technical field of underground pipeline renewal, and in particular to a multifunctional excavation device. Background Art

[0002] At present, when replacing underground pipe sections, trenchless pipe renewal construction is generally adopted. During construction, the old pipe section is cut by a tunnel boring machine and the waste residue generated by cutting is transported out, and then the new pipe section is pushed in to complete the replacement of the underground pipeline. However, when the old pipe section is a socket-end pipe, the steel sleeve ring at the socket end of the old pipe section is thick and extremely difficult to break, making the construction difficult.

[0003] In this regard, a Chinese invention patent application with application publication number CN112483104A discloses a pipe-eating method for pipeline renewal tunneling machine and construction method. The tunneling machine includes a main machine (i.e., a tunneling device) and a propulsion device. The propulsion device includes a jacking cylinder. During the tunneling process, the jacking cylinder pushes the new pipe section forward and thereby pushes the tunneling device forward. The tunneling device is provided with a pipe-eating cutter disc. The pipe-eating cutter disc adopts a hollow design. The pipe-eating cutter disc cuts the soil layer around the old pipe to eat the old pipe into the tunneling device, thereby achieving the advancement of the tunneling machine and the expansion of the original tunnel without cutting the old pipe.

[0004] The propulsion device in the above patent also includes a winch set in the starting well. The rope on the winch cooperates with the old pipe section through a sliding clamp. When the tunnel boring machine advances forward by a distance of the old pipe section, the winch drags the old pipe section closest to the starting well into the starting well and hoists it out, completing the removal of the old pipe section. However, the winch is set in the starting well, occupying the working space of the starting well, increasing the difficulty of arranging the propulsion cylinder, and the connection method between the winch and the old pipe section is complicated, resulting in low construction efficiency. Summary of the invention

[0005] The object of the present invention is to provide a multifunctional tunneling device to solve the problems of low efficiency in removing old pipe sections and the old pipe section removal device occupying the working space of the starting well.

[0006] To achieve the above purpose, the multifunctional tunneling device in the present invention adopts the following technical solutions:

[0007] A multifunctional excavation device includes a shield body used to be sleeved on the outside of an old pipe section and to excavate the soil layer outside the old pipe section forward, a fixed seat and a slide rail are fixed on the inner wall of the shield body, a movable seat is installed on the slide rail for guiding sliding along the front-to-back direction, the movable seat is located on the rear side of the fixed seat, and at least two groups of the fixed seat, the movable seat and the slide rail are arranged along the circumference of the shield body; a first radial telescopic mechanism that can be extended and retracted along the radial direction of the shield body is installed on the fixed seat, and the first radial telescopic mechanism is used to press against the outer wall of the old pipe section on the front side after extension; a second radial telescopic mechanism that can be extended and retracted along the radial direction of the shield body is installed on the movable seat, and the second radial telescopic mechanism is used to press against the outer wall of the old pipe section on the rear side after extension; an axial telescopic mechanism is connected between the fixed seat and the movable seat, and the axial telescopic mechanism is used to extend along the front-to-back direction so that the second radial telescopic mechanism in the pressing state drives the old pipe section on the rear side to move backward away from the old pipe section on the front side.

[0008] The beneficial effects of the above technical solution are as follows: the multifunctional excavation device comprises a shield body, which is sleeved on the outside of the old pipe section and realizes the forward excavation of the soil layer outside the old pipe section; a fixed seat and a slide rail are fixed on the inner wall of the shield body, a movable seat is installed on the slide rail along the front-back direction to guide the sliding, the movable seat is located on the rear side of the fixed seat, an axial telescopic mechanism is connected between the fixed seat and the movable seat, so that when the axial telescopic mechanism is extended, the movable seat can be driven to slide backward; a first radial telescopic mechanism that can be extended and retracted along the radial direction of the shield body is installed on the fixed seat, and a second radial telescopic mechanism that can be extended and retracted along the radial direction of the shield body is installed on the movable seat, so that when the first radial telescopic mechanism is extended and retracted, the movable seat can be driven to slide backward; After the mechanism is extended, it can press against the outer wall of the old pipe section on the front side. At the same time, when the second radial telescopic mechanism is extended, it can press against the outer wall of the old pipe section on the rear side. Since the fixed seat, the movable seat, and the sliding rail are arranged in at least two groups along the circumference of the shield body, that is, the first radial telescopic mechanism on the fixed seat and the second radial telescopic mechanism on the movable seat are arranged in at least two groups along the circumference, the old pipe section on the front side and the old pipe section on the rear side can be clamped along the circumference. At this time, when the axial telescopic mechanism is extended in the front-to-back direction, the second radial telescopic mechanism in the tightening state can drive the old pipe section on the rear side to move backward away from the old pipe section on the front side, thereby realizing the removal of the old pipe section on the rear side.

[0009] Compared with the prior art, the multifunctional excavation device in the present invention respectively presses the outer walls of the front and rear old pipe sections tightly by the first radial telescopic mechanism and the second radial telescopic mechanism, and then separates the front and rear old pipe sections by extending the axial telescopic mechanism. The operation is simple and the construction efficiency is high. The first radial telescopic mechanism, the second radial telescopic mechanism and the axial telescopic mechanism are integrated on the shield body, so that the shield body can both excavate and remove pipes, and these mechanisms are all located on the outside of the old pipeline, do not occupy the space of the starting well, and facilitate the arrangement of the propulsion cylinder.

[0010] Furthermore, a first roller for rolling contact with the outer wall of the old pipe section is installed on the fixed seat, and a second roller for rolling contact with the outer wall of the old pipe section is installed on the movable seat.

[0011] The beneficial effects of the above technical solution are: reducing the friction between the old pipe section and the shield body, and guiding the excavation of the shield body.

[0012] Furthermore, the first roller and the first radial telescopic mechanism are arranged with a front-to-back interval, and the second roller and the second radial telescopic mechanism are arranged with a front-to-back interval.

[0013] The beneficial effects of the above technical solution are: facilitating the arrangement of the rollers and the radial telescopic mechanism, avoiding occupying more circumferential space in the shield body, and facilitating the forward excavation of the shield body.

[0014] Furthermore, the fixed seat includes a first connecting plate fixedly connected to the inner wall of the shield body and a first side plate connected to the first connecting plate on all sides, the first radial telescopic mechanism and the first roller are located in a space surrounded by the first connecting plate and the four first side plates, one end of the first radial telescopic mechanism is fixed to the first connecting plate, two of the four first side plates are arranged front to back, a first fixed shaft is provided between the other two first side plates, and the first roller is installed on the first fixed shaft; the movable seat includes a second connecting plate connected to the slide rail and a second side plate connected to the second connecting plate on all sides, the second radial telescopic mechanism and the second roller are located in a space surrounded by the second connecting plate and the four second side plates, one end of the second radial telescopic mechanism is fixed to the second connecting plate, two of the four second side plates are arranged front to back, a second fixed shaft is provided between the other two second side plates, and the second roller is installed on the second fixed shaft.

[0015] The beneficial effects of the above technical solution are: the fixed seat and the movable seat have a simple structure, with both a connecting plate and a side plate, the strength is guaranteed, and it is convenient to fix the connection with the inner wall of the shield body and the connection with the slide rail, which facilitates the installation and fixation of the radial telescopic mechanism. At the same time, by setting a fixed shaft between two of the four side plates, the installation of the roller is facilitated.

[0016] Furthermore, the fixed seat also includes a first middle plate fixedly connected to the middle parts of the four first side plates, and the first radial telescopic machine passes through the first middle plate and is fixed to the first middle plate; the movable seat also includes a second middle plate fixedly connected to the middle parts of the four second side plates, and the second radial telescopic machine passes through the second middle plate and is fixed to the second middle plate.

[0017] The beneficial effects of the above technical solution are: the middle plate is fixedly connected to the middle of the four side plates, which improves the structural strength of the fixed seat and the movable seat, and the radial telescopic machine passes through the middle plate and is fixed to the middle plate, which further improves the installation and fixing effect of the radial telescopic machine.

[0018] Furthermore, the fixed seat also includes a first closing plate fixedly connected to one end of the four first side plates away from the first connecting plate, the first closing plate is provided with a first exposure hole for exposing the first roller and a first through-hole for the telescopic end of the first radial telescopic mechanism to pass through, a plurality of first partitions arranged in parallel and spaced apart from each other in front and back are fixed between the first closing plate and the first middle plate, the first partition separates the first roller from the first radial telescopic mechanism; the movable seat also includes a second closing plate fixedly connected to one end of the four second side plates away from the second connecting plate, the second closing plate is provided with a second exposure hole for exposing the second roller and a second through-hole for the telescopic end of the second radial telescopic mechanism to pass through, a plurality of second partitions arranged in parallel and spaced apart from each other in front and back are fixed between the second closing plate and the second middle plate, the second partition separates the second roller from the second radial telescopic mechanism.

[0019] The beneficial effects of the above technical solution are: the sealing plate can prevent excessive soil from entering the fixed seat and the movable seat, thereby ensuring the use effect of the roller and the radial telescopic mechanism; a partition is fixed between the sealing plate and the middle plate, which not only further improves the structural strength of the fixed seat and the movable seat, but also separates the roller and the radial telescopic mechanism to avoid mutual interference.

[0020] Furthermore, first fixed plates are respectively fixed between the first sealing plate and the first middle plate on both axial sides of the first roller, and the first fixed shaft is installed between the two first fixed plates; second fixed plates are respectively fixed between the second sealing plate and the second middle plate on both axial sides of the second roller, and the second fixed shaft is installed between the two second fixed plates.

[0021] The beneficial effect of the above technical solution is that the setting of the fixed shaft is facilitated by the fixed plate. Compared with the fixed shaft being directly installed on the side plate, this solution can make the fixed shaft as short as possible, thereby facilitating the installation and rotation of the roller.

[0022] Furthermore, a first baffle plate is fixed between the first connecting plate and the first middle plate, and the front end of the axial telescopic mechanism is fixedly arranged in the space surrounded by the first baffle plate, the first connecting plate and the first middle plate, and the axial telescopic mechanism passes through the first side plate on the rear side; a second baffle plate is fixed between the second connecting plate and the second middle plate, and the rear end of the axial telescopic mechanism is fixedly arranged in the space surrounded by the second baffle plate, the second connecting plate and the second middle plate, and the axial telescopic mechanism passes through the second side plate on the front side.

[0023] The beneficial effect of the above technical solution is that the two ends of the axial telescopic mechanism are located inside the fixed seat and the movable seat, which not only facilitates the installation of the axial telescopic mechanism, but also can shorten the distance between the fixed seat and the movable seat as much as possible, making it convenient to split the two adjacent old pipe sections, and at the same time can also reduce the axial size of the shield body.

[0024] Furthermore, the front end of the shield body is provided with a cutting edge for digging forward in the soil layer.

[0025] The beneficial effects of the above technical solution are: excavation is carried out forward through the cutting edge, the structure is simple, and it is easy to manufacture, which can reduce the manufacturing cost of the multifunctional excavation device and can also reduce the impact of construction on the soil layer.

[0026] Furthermore, a reinforcing plate is fixed to the front end of the inner wall of the shield body, the fixing seat is fixedly connected to the reinforcing plate, and the front end surface of the reinforcing plate is an inclined surface which gradually approaches the center of the shield body from front to back.

[0027] The beneficial effect of the above technical solution is that the reinforcing plate further improves the fixing effect of the fixing seat, and at the same time the inclined surface at the front end of the reinforcing plate can reset the dislocated old pipe section into the shield body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the multifunctional excavation device in the present invention;

[0029] Figure 2 for Figure 1 An enlarged view of the fixed seat and the movable seat;

[0030] Figure 3 for Figure 1 A cross-sectional view of the reinforcement plate and the old pipe section of the multifunctional tunneling device when in use;

[0031] Figure 4 for Figure 1 A cross-sectional view of the first radial telescopic mechanism and the old pipe section of the multifunctional tunneling device when in use;

[0032] Figure 5 for Figure 4 A partial enlarged view of the first radial telescopic mechanism and the fixed seat (rotated);

[0033] Figure 6 for Figure 1 A cross-sectional view of the second roller part and the old pipe section of the multifunctional tunneling device when in use;

[0034] Figure 7 for Figure 6 A partial enlarged view of the second roller, the moving seat, the slide rail and the shield body (rotated);

[0035] Figure 8 for Figure 2 A partial cross-sectional view of the first roller portion;

[0036] Fig. 9 A schematic diagram of the working shaft construction state of the multifunctional tunneling device of the present invention when in use;

[0037] Fig.10It is a schematic diagram of the equipment installation state of the multifunctional excavation device in the present invention when in use;

[0038] Fig.11 It is a schematic diagram of the jacking construction state of the multifunctional tunneling device of the present invention when in use;

[0039] Fig.12 for Fig.11 A cross-sectional view of the middle transport trolley;

[0040] Fig.13 It is a schematic diagram of the equipment receiving state of the multifunctional tunneling device of the present invention when in use;

[0041] Fig.14 This is a schematic diagram of the construction state of the inspection well when the multifunctional excavation device of the present invention is in use;

[0042] Fig.15 It is a schematic diagram of the state of constructing a new planned well when the multifunctional tunneling device of the present invention is in use.

[0043] In the figure: 1, shield body; 1-1, cutting edge; 2, fixed seat; 2-1, first connecting plate; 2-2, first side plate; 2-3, first middle plate; 2-4, first closing plate; 2-5, first partition plate; 2-6, first baffle plate; 2-7, first fixed plate; 2-8, first fixed shaft; 3, slide rail; 4, moving seat; 4-1, second connecting plate; 4-2, second side plate; 4-3, second middle plate; 4-4, second closing plate; 4-5, second partition plate; 4-6, second baffle plate; 4-7, second fixed plate; 4-8, second fixed Axis; 5. first radial telescopic mechanism; 5-1. supporting pad; 5-2. rubber pad; 6. second radial telescopic mechanism; 7. axial telescopic mechanism; 8. first roller; 9. second roller; 10. reinforcing plate; 11. retaining brush; 12. annular rear end plate; 13. cone; 14. old well; 15. old pipeline; 16. starting well; 17. receiving well; 18. propulsion device; 19. old pipe section; 20. new pipe section; 21. transport and management trolley; 22. hoist; 23. inspection well; 24. new well; 100. multifunctional excavation device. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0046] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0047] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0048] An embodiment of the multifunctional excavation device of the present invention is as follows Figure 1 As shown, it includes a shield body 1, combined with Figure 3 , Figure 4 and Figure 6 As shown, the shield body 1 is used to be sleeved on the outside of the old pipe section 19 and to dig forward the outer soil layer of the old pipe section 19. Specifically, the front end of the shield body 1 is provided with a cutting edge 1-1, which is inserted into the soil layer for forward digging. This structure is simple and easy to manufacture, which can reduce the manufacturing cost of the multifunctional excavation device and can also reduce the impact of construction on the soil layer.

[0049] like Figure 1 As shown, a fixed seat 2 and a slide rail 3 are fixed on the inner wall of the shield body 1, a movable seat 4 is installed on the slide rail 3 for guiding sliding along the front-back direction, the movable seat 4 is located at the rear side of the fixed seat 2, and four groups of the fixed seat 2, the movable seat 4 and the slide rail 3 are evenly distributed along the circumference of the shield body 1.

[0050] The fixing seat 2 is provided with a first radial telescopic mechanism 5 which can be telescoped in the radial direction of the shield body. The first radial telescopic mechanism 5 is used to press against the outer wall of the old pipe section at the front side (such as Figure 4As shown). The fixed seat 2 is also equipped with a first roller 8 for rolling contact with the outer wall of the old pipe segment. Three first rollers 8 are provided on one fixed seat 2, and two first radial telescopic mechanisms 5 are provided. Each first roller 8 and the first radial telescopic mechanism 5 are arranged at intervals in front and behind. The multiple groups of first rollers 8 arranged along the circumference of the shield body 1 can not only reduce the friction between the shield body 1 and the old pipe segment, but also guide the excavation of the shield body 1.

[0051] like Figure 2 As shown, the fixing seat 2 includes a first connecting plate 2-1 fixedly connected to the inner wall of the shield body 1 and a first side plate 2-2 connected to the first connecting plate 2-1 on all sides, two of the four first side plates 2-2 are arranged front and back, the first radial telescopic mechanism 5 and the first roller 8 are located in the space surrounded by the first connecting plate 2-1 and the four first side plates 2-2, and one end of the first radial telescopic mechanism 5 is fixed to the first connecting plate 2-1. The fixing seat 2 also includes a first intermediate plate 2-3 fixedly connected to the middle of the four first side plates 2-2, combined with Figure 5 As shown, the first radial telescopic mechanism 5 passes through the first middle plate 2-3 and is fixed to the first middle plate 2-3. The first radial telescopic mechanism 5 adopts a hydraulic cylinder, a pneumatic cylinder or an electric push rod, and a support pad 5-1 is fixed on its telescopic end. At the same time, a rubber pad 5-2 is also fixed on the support pad 5-1, which can increase the friction between the outer wall of the old pipe section and ensure the tightening effect.

[0052] Combination Figure 8 As shown, the fixing seat 2 also includes a first sealing plate 2-4 fixedly connected to one end of the four first side plates 2-2 away from the first connecting plate 2-1. Of course, the first sealing plate 2-4 is provided with a first exposure hole (not marked in the figure) for exposing the first roller 8 and a first through hole (not marked in the figure) for the telescopic end of the first radial telescopic mechanism 5 to pass through. Figure 2 As shown, a plurality of first partition plates 2 - 5 are fixed between the first sealing plate 2 - 4 and the first middle plate 2 - 3 and are arranged in parallel and spaced apart from each other in the front and rear directions. The first partition plates 2 - 5 separate the first roller 8 and the first radial telescopic mechanism 5 .

[0053] like Figure 8 As shown, a first fixed shaft 2-8 is arranged between the other two first side plates 2-2 of the four first side plates 2-2, and the first roller 8 is mounted on the first fixed shaft 2-8. Specifically, first fixed plates 2-7 are respectively fixed between the first closing plate 2-4 and the first intermediate plate 2-3 on both sides of the axial direction of the first roller 8, and the first fixed shaft 2-8 is installed between the two first fixed plates 2-7, which facilitates the arrangement of the first fixed shaft 2-8. The first fixed shaft 2-8 is fixed to the inner hole of the first roller 8, which facilitates the rotation of the first roller 8.

[0054] The structure of the movable seat 4 is the same as that of the fixed seat 2. Figure 1 and Figure 2 As shown, the moving seat 4 is equipped with a second radial telescopic mechanism 6 that can be telescoped in the radial direction of the shield body. The second radial telescopic mechanism 6 is used to press against the outer wall of the old pipe section at the rear side after being stretched. The moving seat 4 is also equipped with a second roller 9 (as shown in FIG. 6 ) for rolling contact with the outer wall of the old pipe section. There are three second rollers 9 on one moving seat 4 and two second radial telescopic mechanisms 6. Each second roller 9 and the second radial telescopic mechanism 6 are arranged at intervals in front and behind. The multiple groups of second rollers 9 arranged along the circumference of the shield body 1 can not only reduce the friction between the shield body 1 and the old pipe section, but also guide the excavation of the shield body 1.

[0055] Combination Figure 2 and Figure 7 As shown, the movable seat 4 includes a second connecting plate 4-1 connected to the slide rail 3 and a second side plate 4-2 connected to the second connecting plate 4-1. Two of the four second side plates 4-2 are arranged front and back. The second radial telescopic mechanism 6 and the second roller 9 are located in the space surrounded by the second connecting plate 4-1 and the four second side plates 4-2. One end of the second radial telescopic mechanism 6 is fixed on the second connecting plate 4-1. The movable seat 4 also includes a second middle plate 4-3 fixedly connected to the middle of the four second side plates 4-2. The second radial telescopic mechanism 6 passes through the second middle plate 4-3 and is fixed to the second middle plate 4-3. The second radial telescopic mechanism 6 also adopts a hydraulic cylinder, a pneumatic cylinder or an electric push rod. A support pad is fixed on its telescopic end. At the same time, a rubber pad is fixed on the support pad to increase the friction between the outer wall of the old pipe section and ensure the tightening effect.

[0056] like Figure 7 As shown, the movable seat 4 also includes a second sealing plate 4-4 fixedly connected to one end of the four second side plates 4-2 away from the second connecting plate 4-1. Of course, the second sealing plate 4-4 is provided with a second exposure hole (not marked in the figure) for exposing the second roller 9 and a second through hole (not marked in the figure) for the telescopic end of the second radial telescopic mechanism 6 to pass through. Figure 2 As shown, a plurality of second partition plates 4 - 5 are fixed between the second sealing plate 4 - 4 and the second middle plate 4 - 3 and are arranged in parallel and spaced apart from each other. The second partition plates 4 - 5 separate the second roller 9 and the second radial telescopic mechanism 6 .

[0057] like Figure 7As shown, a second fixed shaft 4-8 is arranged between the other two second side plates 4-2 of the four second side plates 4-2, and the second roller 9 is mounted on the second fixed shaft 4-8. Specifically, second fixed plates 4-7 are respectively fixed between the second closing plate 4-4 and the second middle plate 4-3 on both sides of the axial direction of the second roller 9, and the second fixed shaft 4-8 is installed between the two second fixed plates 4-7, which facilitates the arrangement of the second fixed shaft 4-8. The second fixed shaft 4-8 is fixed to the inner hole of the second roller 9, which facilitates the rotation of the second roller 9.

[0058] like Figure 1 As shown, an axial telescopic mechanism 7 is connected between the fixed seat 2 and the movable seat 4. The axial telescopic mechanism 7 also adopts a hydraulic cylinder, a pneumatic cylinder or an electric push rod (the axial telescopic mechanism 7, the first radial telescopic mechanism 5, and the second radial telescopic mechanism 6 in the attached figure are all schematic diagrams and do not represent the actual shape and structure), which is used to extend in the front-to-back direction so that the second radial telescopic mechanism 6 in the tightened state drives the old pipe section on the rear side to move backward away from the old pipe section on the front side.

[0059] Specifically, Figure 2 As shown, a first baffle plate 2-6 is fixed between the first connecting plate 2-1 and the first middle plate 2-3, and the front end of the axial telescopic mechanism 7 is fixedly arranged in the space surrounded by the first baffle plate 2-6, the first connecting plate 2-1, and the first middle plate 2-3, and the axial telescopic mechanism 7 passes through the first side plate 2-2 at the rear side. At the same time, a second baffle plate 4-6 is fixed between the second connecting plate 4-1 and the second middle plate 4-3, and the rear end of the axial telescopic mechanism 7 is fixedly arranged in the space surrounded by the second baffle plate 4-6, the second connecting plate 4-1, and the second middle plate 4-3, and the axial telescopic mechanism 7 passes through the second side plate 4-2 at the front side. The two ends of the axial telescopic mechanism 7 are located inside the fixed seat 2 and the movable seat 4, which not only facilitates the installation of the axial telescopic mechanism 7, but also can shorten the distance between the fixed seat 2 and the movable seat 4 as much as possible, facilitates the splitting of two adjacent old pipe sections, and also can reduce the axial size of the shield body 1.

[0060] In addition, if Figure 1 and Figure 3 As shown, a reinforcing plate 10 is fixed to the front end of the inner wall of the shield body 1, and the fixing seat 2 is fixedly connected to the reinforcing plate 10, thereby improving the fixed connection strength between the fixing seat 2 and the shield body 1. The front end surface of the reinforcing plate 10 is an inclined surface that gradually approaches the center of the shield body 1 from front to back, and the dislocated old pipe section can be reset into the shield body 1.

[0061] like Figure 1As shown, in order to prevent soil from entering between the shield body 1 and the outer wall of the old pipe section, a soil retaining brush 11 is provided at the front end of the shield body 1. At the same time, an annular rear end plate 12 is fixed to the rear end of the shield body 1, and the rear side of the annular rear end plate 12 is used to press with the propulsion device or the new pipe section, so that the propulsion device directly or indirectly applies a forward thrust to the shield body 1 through the new pipe section. A cone 13 is also fixed to the rear end of the shield body 1, one end of the cone 13 is fixedly connected to the annular rear end plate 12, and the other end is fixedly connected to the inner wall of the shield body 1, and the inner wall surface of the cone 13 constitutes a soil retaining surface.

[0062] The multifunctional excavation device of the present invention presses the outer wall of the old pipe section on the front side through multiple groups of first radial telescopic mechanisms, presses the outer wall of the old pipe section on the rear side through multiple groups of second radial telescopic mechanisms, clamps the old pipe section on the front side and the old pipe section on the rear side, and then through the extension of the axial telescopic mechanism in the front-to-back direction, the second radial telescopic mechanism in the pressing state can drive the old pipe section on the rear side to move backward away from the old pipe section on the front side, so as to realize the removal of the old pipe section on the rear side, and the operation method is simple and the construction efficiency is high. The first radial telescopic mechanism, the second radial telescopic mechanism and the axial telescopic mechanism are integrated on the shield body, so that the shield body can both excavate and remove pipes, and these mechanisms are all located on the outside of the old pipeline, do not occupy the space of the starting well, and facilitate the arrangement of the propulsion cylinder.

[0063] The multifunctional excavation device of the present invention specifically comprises the following steps when in use:

[0064] S1. Construction preparation: Determine the pipeline in-situ replacement construction section, such as Fig. 9 As shown, the position of the old pipe 15 to be replaced is determined, and the sewage at both ends of the old pipe 15 is diverted, wherein the old pipe 15 is composed of a plurality of old pipe sections 19;

[0065] S2. Working pit construction: Fig. 9 As shown, the working well includes a starting well 16 and a receiving well 17. After the positions of the starting well 16 and the receiving well 17 are determined, the working well construction is carried out;

[0066] S3. Equipment installation: Fig.10 As shown, the multifunctional excavation device 100 and the propulsion device 18 are hoisted into the starting shaft 16 for installation. After the installation is completed, the shield body 1 of the multifunctional excavation device 100 is pushed forward according to the planned route by the propulsion device 18;

[0067] S4, jacking construction: Fig.11 As shown, the shield body 1 is pushed forward by controlling the propulsion device 18. When the two old pipe sections 19 at the ends are completely inserted into the shield body 1, the two old pipe sections 19 are separated by the first radial telescopic mechanism, the second radial telescopic mechanism and the axial telescopic mechanism installed on the shield body 1. Fig.11 and Fig.12As shown in the figure, the separated old pipe section 19 is transported to the starting well 16, and the old pipe section 19 is lifted out by the lifting device 22, and then a new pipe section 20 is lifted in, and the new pipe section 20 is installed between the propulsion device 18 and the shield body 1;

[0068] S5. Equipment receiving: Fig.13 As shown, the multifunctional excavation device 100 is pushed out of the receiving shaft 17, and the tunnel door is sealed;

[0069] S6. Construction of inspection wells: Fig.14 As shown, after the propulsion device 18 is dismantled and hoisted out, an inspection well 23 is built at the location of the starting well 16 and the receiving well 17;

[0070] S7. Construction of new planned wells: Fig.15 As shown, the abandoned old well 14 is backfilled and a planned new well 24 is built.

[0071] In other embodiments of the multifunctional tunneling device, the reinforcing plate is not fixed to the front end of the inner wall of the shield body, and the fixing seat is only fixedly connected to the inner wall of the shield body.

[0072] In other embodiments of the multifunctional tunneling device, a cutting edge is not provided at the front end of the shield body, but a cutter disc is provided as in the prior art.

[0073] In other embodiments of the multifunctional tunneling device, the front and rear ends of the axial telescopic mechanism are not located inside the fixed seat and the movable seat. For example, the front end of the axial telescopic mechanism is fixedly connected to the first side plate on the rear side of the fixed seat, and the rear end of the axial telescopic mechanism is fixedly connected to the second side plate on the front side of the movable seat.

[0074] In other embodiments of the multifunctional tunneling device, the first fixed plate is not fixed between the first sealing plate and the first middle plate, and the two ends of the first fixed shaft are directly installed on the two first side plates; the second fixed plate is not fixed between the second sealing plate and the second middle plate, and the two ends of the second fixed shaft are directly installed on the two second side plates.

[0075] In other embodiments of the multifunctional excavation device, the first sealing plate and the first partition plate are not provided; similarly, the second sealing plate and the second partition plate are not provided.

[0076] In other embodiments of the multifunctional tunneling device, the first intermediate plate and the second intermediate plate are not provided.

[0077] In other embodiments of the multifunctional tunneling device, the structure of the fixed seat may also include a fixed plate fixedly connected to the inner wall of the shield body and a connecting plate vertically connected to the fixed plate, one end of the first radial telescopic mechanism is fixed on the fixed plate, and the first roller is installed on the connecting plate. Of course, the structure of the movable seat may also be of this form.

[0078] In other embodiments of the multifunctional tunneling device, the first roller and the first radial telescopic mechanism may not be arranged in a front-to-back arrangement, but may be arranged in a circumferential arrangement along the shield body. Of course, the second roller and the second radial telescopic mechanism may not be arranged in a front-to-back arrangement, but may be arranged in a circumferential arrangement along the shield body.

[0079] In other embodiments of the multifunctional excavation device, the first roller is not installed on the fixed seat, and the second roller is not installed on the movable seat.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A multifunctional excavation device, characterized in that: The invention comprises a shield body (1) for being sleeved on the outside of an old pipe section and for excavating the soil layer outside the old pipe section forwardly. A fixed seat (2) and a slide rail (3) are fixed on the inner wall of the shield body (1). A movable seat (4) is installed on the slide rail (3) in a guided sliding manner in the front-rear direction. The movable seat (4) is located at the rear side of the fixed seat (2). At least two groups of the fixed seat (2), the movable seat (4) and the slide rail (3) are arranged along the circumference of the shield body (1). A first radial telescopic mechanism (5) which can be extended and retracted radially along the shield body (1) is installed on the fixed seat (2). The first radial telescopic mechanism (5) is used to press against the outer wall of the old pipe section at the front side after being stretched; the movable seat (4) is provided with a second radial telescopic mechanism (6) which can be stretched radially along the shield body (1); the second radial telescopic mechanism (6) is used to press against the outer wall of the old pipe section at the rear side after being stretched; an axial telescopic mechanism (7) is connected between the fixed seat (2) and the movable seat (4); the axial telescopic mechanism (7) is used to extend in the front-back direction so that the second radial telescopic mechanism (6) in the pressing state drives the old pipe section at the rear side to move backward away from the old pipe section at the front side.

2. The multifunctional excavation device according to claim 1, characterized in that: A first roller (8) for rolling contact with the outer wall of the old pipe section is also installed on the fixed seat (2), and a second roller (9) for rolling contact with the outer wall of the old pipe section is also installed on the movable seat (4).

3. The multifunctional excavation device according to claim 2, characterized in that: The first roller (8) and the first radial telescopic mechanism (5) are arranged in a front-to-back arrangement, and the second roller (9) and the second radial telescopic mechanism (6) are arranged in a front-to-back arrangement.

4. The multifunctional excavation device according to claim 3, characterized in that: The fixing seat (2) comprises a first connecting plate (2-1) fixedly connected to the inner wall of the shield body (1) and a first side plate (2-2) connected to the first connecting plate (2-1) on all sides. The first radial telescopic mechanism (5) and the first roller (8) are located in a space enclosed by the first connecting plate (2-1) and the four first side plates (2-2). One end of the first radial telescopic mechanism (5) is fixed to the first connecting plate (2-1). Two of the four first side plates (2-2) are arranged front to back, and a first fixed shaft (2-8) is provided between the other two first side plates (2-2). The first roller (8) is mounted on the first fixed shaft (2-8). The movable seat (4) comprises a second connecting plate (4-1) connected to the slide rail (3) and a second side plate (4-2) connected to the second connecting plate (4-1) on all sides; the second radial telescopic mechanism (6) and the second roller (9) are located in a space enclosed by the second connecting plate (4-1) and the four second side plates (4-2); one end of the second radial telescopic mechanism (6) is fixed to the second connecting plate (4-1); two of the four second side plates (4-2) are arranged front to back, and a second fixed shaft (4-8) is provided between the other two second side plates (4-2); and the second roller (9) is mounted on the second fixed shaft (4-8).

5. The multifunctional excavation device according to claim 4, characterized in that: The fixed seat (2) further comprises a first middle plate (2-3) fixedly connected to the middle parts of the four first side plates (2-2), and the first radial telescopic machine passes through the first middle plate (2-3) and is fixed to the first middle plate (2-3); the movable seat (4) further comprises a second middle plate (4-3) fixedly connected to the middle parts of the four second side plates (4-2), and the second radial telescopic machine passes through the second middle plate (4-3) and is fixed to the second middle plate (4-3).

6. The multifunctional excavation device according to claim 5, characterized in that: The fixing seat (2) further comprises a first sealing plate (2-4) fixedly connected to one end of the four first side plates (2-2) away from the first connecting plate (2-1); the first sealing plate (2-4) is provided with a first exposure hole for exposing the first roller (8) and a first through hole for the telescopic end of the first radial telescopic mechanism (5) to pass through; a plurality of first partition plates (2-5) are fixedly arranged in parallel and spaced apart from each other between the first sealing plate (2-4) and the first intermediate plate (2-3); the first partition plates (2-5) separate the first roller (8) and the first radial telescopic mechanism (5); The movable seat (4) further comprises a second sealing plate (4-4) fixedly connected to one end of the four second side plates (4-2) away from the second connecting plate (4-1); the second sealing plate (4-4) is provided with a second exposure hole for exposing the second roller (9) and a second through hole for the telescopic end of the second radial telescopic mechanism (6) to pass through; a plurality of second partition plates (4-5) are fixedly arranged in parallel and spaced apart from each other between the second sealing plate (4-4) and the second middle plate (4-3); the second partition plates (4-5) separate the second roller (9) and the second radial telescopic mechanism (6).

7. The multifunctional excavation device according to claim 6, characterized in that: A first fixing plate (2-7) is fixed between the first closing plate (2-4) and the first intermediate plate (2-3) on both axial sides of the first roller (8), and the first fixing shaft (2-8) is installed between the two first fixing plates (2-7); a second fixing plate (4-7) is fixed between the second closing plate (4-4) and the second intermediate plate (4-3) on both axial sides of the second roller (9), and the second fixing shaft (4-8) is installed between the two second fixing plates (4-7).

8. The multifunctional excavation device according to any one of claims 5 to 7, characterized in that: A first baffle plate (2-6) is fixed between the first connecting plate (2-1) and the first middle plate (2-3); a front end of the axial telescopic mechanism (7) is fixedly arranged in a space surrounded by the first baffle plate (2-6), the first connecting plate (2-1) and the first middle plate (2-3), and the axial telescopic mechanism (7) passes through the first side plate (2-2) at the rear side; a second baffle plate (4-6) is fixed between the second connecting plate (4-1) and the second middle plate (4-3); a rear end of the axial telescopic mechanism (7) is fixedly arranged in a space surrounded by the second baffle plate (4-6), the second connecting plate (4-1) and the second middle plate (4-3), and the axial telescopic mechanism (7) passes through the second side plate (4-2) at the front side.

9. The multifunctional excavation device according to any one of claims 1 to 7, characterized in that: The front end of the shield body (1) is provided with a cutting edge (1-1) for digging forward in the soil layer.

10. The multifunctional excavation device according to any one of claims 1 to 7, characterized in that: A reinforcing plate (10) is fixed to the front end of the inner wall of the shield body (1), the fixing seat (2) is fixedly connected to the reinforcing plate (10), and the front end surface of the reinforcing plate (10) is an inclined surface which gradually approaches the center of the shield body (1) from front to back.

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