Slurry pipe replacement telescopic device

Abstract

The utility model provides a slurry pipe replacement telescopic device. The slurry pipe sliding rail is arranged on the side wall of a shield launching area, the sliding mechanism is fixed on a slurry inlet pipe and a slurry return pipe of a slurry circulating system, and the slurry pipe sliding rail is parallel to the walking direction of the shield tunneling machine. The sliding mechanism is installed in a vertical supporting section area where the slurry inlet pipe and the slurry return pipe vertically extend to the underground from the ground. The sliding mechanism comprises a pipeline support and a walking pulley fixed to the pipeline support, the vertical supporting section of the slurry inlet pipe is fixedly connected with the vertical supporting section of the slurry return pipe through the pipeline support, and the walking pulley is connected with the slurry pipe sliding rail in a sliding mode. The whole pipe replacing process is simple and convenient, a pipe replacing device does not need to be used in a matched mode, the construction space is small, and the pipe replacing device is suitable for being used under the narrow and small pipe replacing device installation space.

Description

Technical Field

[0001] The utility model relates to the field of slurry shield construction, in particular to a slurry pipe replacement and telescopic device suitable for split starting of a large-diameter slurry shield. Background Art

[0002] A slurry shield pumps a certain concentration of slurry into the shield's slurry chamber. As the soil and groundwater removed by the cutterhead flow into the excavation along the cutter grooves, the slurry concentration and pressure in the slurry chamber gradually increase, balancing the soil and water pressure on the excavation surface. This forms a mud film or a permeable wall formed by the mud-water pressure on the excavation surface, providing stable excavation. A slurry loop is formed through the slurry inlet and outlet pipes. The slurry carries the soil to the slurry-water separation station through the slurry discharge pipes, where the dry slag is separated, allowing the excavation to proceed in a circular manner. Continuous excavation is achieved by continuously extending the slurry pipelines.

[0003] The split launch of a large-diameter shield machine is a technical challenge in shield construction, especially under space-constrained conditions. How to split the shield machine and reassemble it inside the tunnel becomes a key issue. For the split launch process of a large-diameter slurry shield, in addition to considering the assembly and lifting of the shield machine, the extension of the slurry pipe is also a key consideration. Existing slurry shields reserve a sufficient length of hose on the top of the trolley to allow the inlet and outlet pipes to move forward. The trolley position remains relatively unchanged, and the pipe change operation is completed by moving the pipe-changing device traveling frame. However, since the pipe-changing device is generally installed at the end of the last trolley, in some cases where the launch shaft is small and the trolley cannot be fully lowered, the pipe change process cannot be carried out underground. Furthermore, conventional slurry pipe-changing devices occupy a large space and are complex to operate, making the installation of the ring pipe device impossible in some confined spaces. As the shield advances, how to achieve the expansion and contraction of large-diameter, high-strength slurry pipes is also a prerequisite for the successful implementation of split launch. In view of the above problems, the present invention studies a slurry pipe replacement system suitable for split-starting of a large-diameter slurry shield. Summary of the Invention

[0004] The utility model provides a mud pipe replacement telescopic device in view of the deficiencies in the prior art. The telescopic device can realize the expansion and contraction process of the mud pipe without the need for a pipe replacement device, thereby ensuring the normal operation of the split start of a large-diameter slurry shield.

[0005] In order to achieve the above-mentioned technical objectives, the utility model provides a mud pipe replacement and telescopic device, which includes a mud pipe replacement and telescopic device arranged on the side wall of the shield starting area and a sliding mechanism fixed on the slurry inlet pipe and the slurry return pipe of the mud circulation system. The mud pipe sliding track is parallel to the walking direction of the shield machine, and the sliding mechanism is installed in the vertical support section area of ​​the slurry inlet pipe and the slurry return pipe extending vertically from the ground to the underground; the sliding mechanism includes a pipe bracket and a walking pulley fixed on the pipe bracket, and the pipe bracket fixedly connects the vertical support section of the slurry inlet pipe and the slurry return pipe, and the walking pulley is slidably connected to the mud pipe sliding track.

[0006] The better technical solution of the utility model is as follows: a mud pipe traction mechanism is also provided at the starting end of the mud pipe sliding track, and a traction bracket is provided on the pipe bracket. The traction rope of the mud pipe traction mechanism is connected to the traction bracket. The traction mechanism is used to pull the pipe bracket and the vertical supporting sections of the slurry inlet pipe and the slurry return pipe back to the starting end of the mud pipe sliding track when the pipe bracket moves to the tail end of the mud pipe sliding track.

[0007] The utility model further provides a technical solution: the mud circulation system includes a mud station located on the ground and a shield trolley located in the starting well, and the mud station and the shield trolley are circulatedly connected through a slurry inlet pipe and a slurry return pipe; the mud pipe replacement telescopic device also includes a slurry inlet pipe support platform and a slurry return pipe support platform located on the ground, and the slurry inlet pipe and the slurry return pipe both include a telescopic hose section located on the ground, a fixed section connected to the tail end of the shield trolley, and a vertical support section connecting the telescopic hose section and the fixed section, the telescopic hose section of the slurry inlet pipe is slidably placed on the slurry inlet pipe support platform, and the telescopic hose section of the slurry return pipe is slidably placed on the slurry return pipe support platform.

[0008] The better technical solution of the utility model is as follows: the pipe support is provided with at least two groups, which are distributed on the upper and lower parts of the vertical support sections of the slurry inlet pipe and the slurry return pipe, and at least two mud pipe sliding tracks are arranged correspondingly on the side walls of the shield starting area. Each mud pipe sliding track is a concave track with the track surface facing upward, and limiting baffles are provided at both ends; the pipe support includes two integrated pipe clamp structures, which are respectively fixedly mounted on the outer walls of the vertical support sections of the slurry inlet pipe and the slurry return pipe, and the walking pulley is fixedly installed on the side of the pipe support and is slidably connected to the corresponding mud pipe sliding track.

[0009] The better technical solution of the utility model is as follows: the traction mechanism is an electric winding mechanism and a hand hoist, each mud pipe sliding track is correspondingly provided with one or two sets of traction mechanisms, the traction bracket is vertically arranged on the outer side of the pipe bracket, and two traction rope connection ports are provided on the traction bracket; the traction rope is a steel wire rope, which is wound on the drum of the electric winding mechanism or the hand hoist.

[0010] The better technical solution of the utility model is as follows: the fixed section of the slurry inlet pipe is detachably connected to the slurry inlet at the rear end of the shield trolley, the fixed section of the slurry return pipe is detachably connected to the slurry return port at the rear end of the shield trolley, and control valves are provided at the slurry inlet and slurry outlet at the rear end of the shield trolley; a construction platform is provided in an area at the same height as the fixed section at the lower end of the side wall of the shield starting area.

[0011] The better technical solution of the utility model is as follows: the telescopic hose section of the slurry inlet pipe and the slurry return pipe includes a horizontal hose section and a curved hose section, which are placed flat on the corresponding support platform and connected to the corresponding vertical support section through a curved pipe joint, and a lubricating layer is coated on the contact surface between the slurry inlet pipe support platform and the slurry return pipe support platform and the telescopic hose.

[0012] The utility model discloses a pipe-changing process of the mud pipe can be realized without the need for a pipe-changing device. During the advancement of the shield machine, the vertical supporting sections of the slurry inlet pipe and the slurry return pipe can move in parallel along the slide rail, and the flexible hose sections of the slurry inlet pipe and the slurry return pipe can also slide and stretch on the platform to ensure that the mud pipe can carry out shield mud circulation normally. When the slurry inlet pipe and the slurry return pipe move to the tail end of the slide rail, the control valves of the slurry inlet and slurry outlet at the tail end of the shield trolley can be closed, and the control valves of the slurry outlet and the slurry return outlet of the mud station are also closed to ensure that there is no slurry in the slurry inlet pipe and the slurry return pipe, the fixed sections of the slurry inlet pipe and the slurry return pipe and the connection part with the shield trolley are disassembled, and the slurry inlet pipe and the slurry return pipe are pulled to the head end of the slide rail by the traction mechanism, and extension pipes are respectively added between the tail end of the shield trolley and the fixed sections of the slurry inlet pipe and the slurry return pipe, and the shield excavation process can be continued.

[0013] The overall pipe replacement process of the utility model is simple and convenient, does not require the use of a matching pipe replacement device, and does not require a large amount of construction space. It can be used in situations where there is a small space and no space for installing a pipe replacement device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 yes Figure 1 A is an enlarged schematic diagram;

[0016] Figure 3 This is a schematic diagram of the slurry inlet pipe and slurry return pipe of the utility model being located at the starting end of the slideway;

[0017] Figure 4 It is a schematic diagram showing that the pulp inlet pipe and pulp return pipe of the utility model are located at the tail end of the slideway.

[0018] In the figure: 1—mud station, 2—slurry inlet pipe, 3—slurry return pipe, 4—slurry inlet pipe support platform, 5—slurry return pipe support platform, 6—side wall of shield starting area, 7—slurry pipe sliding track, 8—sliding mechanism, 800—pipe support, 801—traveling pulley, 9—slurry pipe traction mechanism, 10—traction support, 11—traction rope, 12—construction platform, 13—shield trolley. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 4 The accompanying drawings are simplified examples and are intended solely to clearly and concisely illustrate the embodiments of the present invention. The technical solutions presented in the accompanying drawings are specific examples of the present invention and are not intended to limit the scope of the claimed invention. All other examples derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the present invention is typically placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] The embodiment provides a mud pipe replacement telescopic device for mud circulation of shield split starting, including a mud station 1 located on the ground and a shield trolley 13 located in the starting well, the mud station 1 is provided with a slurry outlet and a slurry return outlet, and the slurry outlet and the slurry return outlet are both provided with control valves, the tail end of the shield trolley 13 is provided with a slurry inlet and a slurry outlet, and the slurry inlet and the slurry outlet are both provided with control valves; the mud station 1 and the shield trolley 13 are circulatedly connected through a slurry inlet pipe 2 and a slurry return pipe 3, the slurry inlet end of the slurry inlet pipe 2 is connected to the slurry outlet of the mud station 1, the slurry outlet of the slurry inlet pipe 2 is detachably connected to the slurry inlet at the tail end of the last shield trolley 13 placed in the well, the slurry inlet end of the slurry return pipe 3 is detachably connected to the slurry outlet at the tail end of the shield trolley 13, and the slurry outlet end of the slurry return pipe 3 is connected to the slurry return outlet of the mud station 1. A construction platform 12 is provided at the lower end of the side wall 6 in the shield starting area at the same height as the fixed section, so that construction workers can stand on the construction platform 12 to disassemble the connection between the slurry inlet pipe 2 and the slurry return pipe 3 and the shield trolley 13 and add an extension pipe.

[0022] The mud pipe replacement telescopic device in the embodiment, such as Figures 1 to 4 As shown, it includes a mud pipe sliding track 7 arranged on the side wall 6 of the shield starting area, a slurry pipe support platform 4 and a return slurry pipe support platform 5 located on the ground. The slurry pipe 2 and the return slurry pipe 3 both include a telescopic hose section located on the ground, a fixed section connected to the tail end of the shield trolley 13, and a vertical support section connecting the telescopic hose section and the fixed section. The telescopic hose section of the slurry pipe 2 is slidably placed on the slurry pipe support platform 4, and the telescopic hose section of the return slurry pipe 3 is slidably placed on the return slurry pipe support platform 5. The mud pipe sliding track 7 is parallel to the travel direction of the shield machine. The vertical support sections of the slurry pipe 2 and the return slurry pipe 3 are both slidably connected to the mud pipe sliding track 7 through a sliding mechanism 8. The telescopic hose sections of the slurry pipe 2 and the return slurry pipe 3 include a horizontal hose section and a curved hose section, which are placed flat on the corresponding support platforms and connected to the corresponding vertical support sections through elbow joints. A lubricating layer is applied to the contact surface of the slurry pipe support platform 4 and the return slurry pipe support platform 5 with the telescopic hose to facilitate the sliding of the slurry pipe 2 and the return slurry pipe 3.

[0023] In the embodiment, the slurry pipe replacement telescopic device, such as Figures 1 to 4 As shown, the sliding mechanism 8 is provided with two groups, distributed at the upper and lower parts of the vertical support sections of the slurry inlet pipe 2 and the return slurry pipe 3, and at least two mud pipe sliding tracks 7 are arranged on the side wall 6 of the shield starting area. Each mud pipe sliding track 7 is a concave track with the track surface facing upward, and a limit baffle is provided at both ends. Each group of sliding mechanisms 8 includes a pipe support 800 and a walking pulley 801 fixed on the pipe support 800. The pipe support 800 includes two integrated pipe clamp structures, which are fixedly mounted on the outer wall of the vertical support section of the slurry inlet pipe 2 and the return slurry pipe 3 respectively. The walking pulley 801 is fixedly mounted on the side of the pipe support 800 and is slidably connected to the corresponding mud pipe sliding track 7, and can move back and forth along the corresponding mud pipe sliding track 7. The power for the forward movement of the sliding mechanism 8 is provided by the shield machine. When the shield machine and the shield trolley 13 move, a traction force is applied to the slurry inlet pipe 2 and the return slurry pipe 3, driving the sliding mechanism 8 to move along the mud pipe sliding track 7.

[0024] In the embodiment, the power for returning the sliding mechanism 8 is provided by the mud pipe traction mechanism 9 provided at the starting end of the mud pipe sliding track 7. Figure 1 and Figure 2As shown, the traction mechanism 9 comprises an electric reeling mechanism and a hand-operated hoist. Each mud pipe sliding track 7 is provided with one or two sets of traction mechanisms 9. A traction bracket 10 is provided on the pipe support 800. The traction bracket 10 is vertically arranged on the outer side of the pipe support 800 and has two traction rope connection ports. The traction rope 11 of the mud pipe traction mechanism 9 is connected to the traction bracket 10. When the pipe support 800 moves to the rear end of the mud pipe sliding track 7, the traction mechanism 9 pulls the pipe support 800 and the vertical support sections of the slurry inlet pipe 2 and the slurry return pipe 3 back to the starting end of the mud pipe sliding track 7. The traction rope 11 is a steel wire rope, which is wound on the drum of the electric reeling mechanism or the hand-operated hoist.

[0025] The slurry station 1 of the utility model is arranged on the ground, and is connected with the slurry inlet pipe 2 and the slurry return pipe 3 of the shield machine to separate and process the slag generated by the shield excavation; the telescopic hose sections of the slurry inlet pipe 2 and the slurry return pipe 3 are located on the ground, respectively supported by a support platform, and the telescopic hose sections move on the corresponding support platform. In order to ensure smooth movement, lubricant or vaseline or other materials can be applied to the upper surface of the support platform in contact with the hose to ensure smooth sliding; the slurry inlet pipe support platform 4 and the slurry return pipe support platform 5 are arranged on the ground, and the specific height is adjusted according to the elevation of the station foundation pit, and a column is set at the bottom, and it is erected into two layers or the same elevation to meet the pipeline sliding requirements; multiple elbows are set between the hard pipes of the slurry inlet pipe 2 and the slurry return pipe 3 and the telescopic hose to achieve connection, and at the same time ensure the rationality of the direction of the pipeline during extension and movement; the sliding bracket of the mud pipe is set in two groups, which can ensure its sliding stability. In order to ensure safety and prevent the pipeline from slipping, an anti-fall device is set on the outside of the pipeline, and a steel wire rope is used for protection;

[0026] After the slurry pipe 2 and the slurry return pipe 3 are in the working state, the slurry pipe 2 and the slurry return pipe 3 are in the working state, and the slurry pipe 2 and the slurry return pipe 3 are in the working state.

[0027] The utility model provides power for the tunneling of the shield machine, driving the movement of the slurry feed pipe 2 and the slurry return pipe 3, and realizing the smooth movement of the pipeline during the shield tunneling. After each excavation of a certain distance, the existing pipeline is disassembled, the original pipeline is pulled back into place, and an extension pipeline is added in the middle to ensure that the pipeline can continue to move forward. The mud pipe on the mud station side is temporarily permanently connected to the mud pipe arranged on the side wall structure until the split start is completed and the hose installed on the ground is synchronously retracted. In order to ensure the convenience of the operation, an operating platform is set at the mud pipe replacement position to facilitate each replacement of the mud pipe; the shield trolley is a portal frame structure with a vehicle passage reserved inside to meet the transportation of pipe segments, related and related consumables during shield tunneling.

[0028] The above is merely one embodiment of the present invention, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A slurry pipe replacement and expansion device, used for slurry circulation when shield machine is split, characterized by: The mud pipe replacement and telescopic device comprises a mud pipe sliding track (7) arranged on the side wall (6) of the shield starting area and a sliding mechanism (8) fixed on the slurry inlet pipe (2) and the slurry return pipe (3) of the mud circulation system, wherein the mud pipe sliding track (7) is parallel to the traveling direction of the shield machine, and the sliding mechanism (8) is installed in the vertical support section area of ​​the slurry inlet pipe (2) and the slurry return pipe (3) extending vertically from the ground to the underground; the sliding mechanism (8) comprises a pipe support (800) and a walking pulley (801) fixed on the pipe support (800), wherein the pipe support (800) fixedly connects the vertical support sections of the slurry inlet pipe (2) and the slurry return pipe (3), and the walking pulley (801) is slidably connected to the mud pipe sliding track (7).

2. The slurry pipe replacement telescopic device according to claim 1, characterized in that: A mud pipe traction mechanism (9) is also provided at the starting end of the mud pipe sliding track (7), and a traction bracket (10) is provided on the pipe bracket (800). A traction rope (11) of the traction mechanism (9) is connected to the traction bracket (10). The traction mechanism (9) is used to pull the pipe bracket (800) and the vertical support sections of the slurry inlet pipe (2) and the slurry return pipe (3) back to the starting end of the mud pipe sliding track (7) when the pipe bracket (800) moves to the tail end of the mud pipe sliding track (7).

3. A slurry pipe replacement telescopic device according to claim 1 or 2, characterized in that: The mud circulation system comprises a mud station (1) located on the ground and a shield trolley (13) located in the starting well, wherein the mud station (1) and the shield trolley (13) are circulatedly connected via a slurry inlet pipe (2) and a slurry return pipe (3); the mud pipe replacement telescopic device further comprises a slurry inlet pipe support platform (4) and a slurry return pipe support platform (5) located on the ground, wherein the slurry inlet pipe (2) and the slurry return pipe (3) both comprise a telescopic hose section located on the ground, a fixed section connected to the tail end of the shield trolley (13), and a vertical support section connecting the telescopic hose section and the fixed section, wherein the telescopic hose section of the slurry inlet pipe (2) is slidably placed on the slurry inlet pipe support platform (4), and the telescopic hose section of the slurry return pipe (3) is slidably placed on the slurry return pipe support platform (5).

4. A slurry pipe replacement telescopic device according to claim 1 or 2, characterized in that: The pipe support (800) is provided with at least two groups, which are distributed on the upper and lower parts of the vertical support sections of the slurry inlet pipe (2) and the slurry return pipe (3); at least two slurry pipe sliding tracks (7) are correspondingly arranged on the side wall (6) of the shield starting area; each slurry pipe sliding track (7) is a concave track with the track surface facing upward, and a limit baffle is provided at both ends; the pipe support (800) includes two integrated pipe clamp structures, which are respectively fixedly sleeved on the outer walls of the vertical support sections of the slurry inlet pipe (2) and the slurry return pipe (3); the walking pulley (801) is fixedly installed on the side of the pipe support (800) and is slidably connected to the corresponding slurry pipe sliding track (7).

5. The slurry pipe replacement telescopic device according to claim 2, characterized in that: The traction mechanism (9) is an electric winding mechanism and a hand chain hoist. Each mud pipe sliding track (7) is provided with one or two sets of traction mechanisms (9). The traction bracket (10) is vertically arranged on the outer side of the pipeline bracket (800), and two traction rope connection ports are provided on the traction bracket (10); the traction rope (11) is a steel wire rope, which is wound on the drum of the electric winding mechanism or the hand chain hoist.

6. The slurry pipe replacement telescopic device according to claim 3, characterized in that: The fixed section of the slurry inlet pipe (2) is detachably connected to the slurry inlet at the tail end of the shield trolley (13), the fixed section of the slurry return pipe (3) is detachably connected to the slurry outlet at the tail end of the shield trolley (13), and control valves are provided at the slurry inlet and the slurry outlet at the tail end of the shield trolley (13); and a construction platform (12) is provided at the lower end of the side wall (6) of the shield starting area at the same height as the fixed section.

7. The slurry pipe replacement telescopic device according to claim 3, characterized in that: The telescopic hose sections of the slurry inlet pipe (2) and the slurry return pipe (3) include horizontal hose sections and curved hose sections, which are placed flat on corresponding support platforms and connected to corresponding vertical support sections via elbow joints. A lubricating layer is coated on the contact surfaces of the slurry inlet pipe support platform (4) and the slurry return pipe support platform (5) with the telescopic hoses.

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