Pipe replacing device and pipe replacing method for slurry pipeline of large-diameter slurry shield tunneling machine

Abstract

The invention discloses a large-diameter slurry shield machine slurry pipeline pipe replacing device and method. The device comprises a pipe replacing trolley, a telescopic pipe device, a driving device, a rear matched trailer, a first pipeline support, a fixing frame and a new slurry pipe, and the pipe replacing trolley is connected with the rear matched trailer and can move back and forth in the length direction of the rear matched trailer; the telescopic pipe device is arranged on the rear matched trailer and supported by the first pipeline support, one end of the telescopic pipe device is connected with the pipe replacing trolley, and the other end of the telescopic pipe device is connected with the fixing frame. The driving device is arranged at the lower part of the pipe replacing trolley; during tunneling, the rear matched trailer drives the pipe replacing trolley to move forwards, the telescopic pipe device stretches out, the pipe replacing trolley moves backwards relative to the rear matched trailer, and when the pipe replacing trolley moves to the tail of the rear section trailer and reaches a pipe replacing distance, tunneling and slurry conveying are stopped, the pipe replacing trolley moves to the initial state, the telescopic pipe device retracts, and a new slurry pipe is replaced. Bend-free connection is achieved, and the pressure loss of a pipeline is small; the structure is simple and operation is convenient.

Description

Technical Field

[0001] The invention relates to a large-diameter slurry pipeline pipe replacement device and a pipe replacement method for a slurry shield machine, belonging to the technical field of construction engineering machinery slurry shield equipment. Background Art

[0002] Slurry shields have been widely used in different fields such as underground subways, railways, electricity, and water conservancy due to their high excavation speed. They are increasingly widely used in the excavation of tunnels with high water pressure, shallow overburden, and unstable strata due to their construction advantages such as high precision in controlling surface settlement and little interference with the soil around the excavation surface. During the tunnel excavation process, as the excavation continues to advance, new mud pipelines need to be connected to ensure the continuity of the slurry discharge and slag discharge of the slurry shield machine. The existing mud pipeline pipe replacement device has a small span and is arranged on a single-section trailer, so the diameter of the mud pipeline is limited; and if the mud pipeline is bent at a large angle, it will cause pressure loss in the mud pipeline. In order to ensure continuous and effective solution to the problem of mud pipeline extension, the present invention provides a large-diameter mud pipeline pipe replacement device for a slurry shield machine. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a large-diameter slurry pipeline pipe replacement device and a pipe replacement method for a slurry pipeline of a slurry shield machine in view of the defects of the prior art.

[0004] In order to solve this technical problem, the present invention provides a large-diameter slurry pipeline pipe-changing device for a slurry shield machine, comprising a pipe-changing trolley, a telescopic pipe device, a driving device, a rear-end trailer, a pipe bracket 1, a fixing frame and a new slurry pipe, wherein the pipe-changing trolley is connected to the rear-end trailer and can move back and forth along the length direction of the rear-end trailer; the telescopic pipe device is arranged on the rear-end trailer and supported by the pipe bracket 1, one end of the telescopic pipe device is connected to the pipe-changing trolley, and the other end is connected to the fixing frame through the pipe bracket 1; the driving device is installed under the pipe-changing trolley The tube-changing trolley is used to drive the tube-changing trolley; when the shield machine is excavating, the rear supporting trailer drives the tube-changing trolley to move forward, the telescopic tube device extends, and the tube-changing trolley moves backward relative to the rear supporting trailer. When the tube-changing trolley moves to the tail of the rear trailer and reaches a tube-changing distance, the shield machine stops excavating and conveying mud, drains the mud in the mud pipeline, cuts off the connection between the telescopic tube device and the fixed frame, and the tube-changing trolley moves to the initial state under the action of the driving device, the telescopic tube device retracts, and replaces with a new mud pipe to realize the tube-changing function of the mud pipeline. The fixed frame is fixed to the trailer by welding.

[0005] The pipe-changing trolley comprises a walking wheel assembly, a structural frame, a pipeline bracket 2 and a fixed mud pipe. The pipeline bracket 1 is fixed by connecting the pipeline bracket 2 with bolts, and the fixed mud pipe is fixed on the pipe-changing trolley at the same time. The pipeline bracket 2 is vertically welded to the structural frame. The pipeline bracket 2 supports the fixed mud pipe. The fixed mud pipe is connected to one end of the telescopic pipe device through a flange. As the pipe-changing trolley moves, the telescopic pipe device is extended. The walking wheel assemblies are arranged at both ends of the structural frame. The pipe-changing trolley cooperates with the rear supporting trailer through the walking wheel assembly and moves back and forth along the length direction of the rear supporting trailer.

[0006] The telescopic tube device is composed of an inner and outer double sleeve, including a telescopic tube outer sleeve, a flushing port and a telescopic tube inner sleeve. The telescopic tube inner sleeve is arranged in the telescopic tube outer sleeve and can move relatively. The flushing port is used to flush the residue brought by the mud in the telescopic tube outer sleeve, so as to facilitate the extension and overlap of the telescopic tube outer sleeve and the telescopic tube inner sleeve.

[0007] The driving device comprises a hydraulic motor assembly, a power gear and a rack. The hydraulic motor assembly drives the power gear. The power gear and the rack are meshed to drive the tube-changing trolley to reciprocate along the track within the travel range.

[0008] The fixing frame comprises a second fixed mud pipe and a fixing bracket. The second fixed mud pipe is connected to the new mud pipe through a flange to transport mud. The fixing bracket supports the second fixed mud pipe.

[0009] The tube changing device is installed on the side close to the rear of the rear supporting trailer, and the tube changing trolley, the telescopic tube device and the fixing frame are all arranged on the same side of the rear supporting trailer.

[0010] The present invention also provides a pipe replacement method using the above-mentioned large-diameter slurry shield machine mud pipeline pipe replacement device, characterized in that it includes the following steps:

[0011] 1) Set the mud pipeline to bypass mode;

[0012] 2) In bypass mode, clean the mud pipe thoroughly with bentonite;

[0013] 3) Disconnect the fixed pipeline from the telescopic sleeve device and drain the mud;

[0014] 4) The rack and pinion drags the tube-changing trolley forward the distance of a new mud tube;

[0015] 5) Connect the new mud pipe to the casing in the telescopic pipe device;

[0016] 6) Restart slurry discharge and continue excavation.

[0017] Beneficial effects: The present invention adopts telescopic pipe to realize pipeline extension, without elbow connection, and the pipeline pressure loss is very small; it is convenient to connect new mud pipes; the span is large and the single pipe replacement stroke is long; the whole set of equipment is low in price, cost-saving, simple in structure and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the present invention in an unextended state;

[0020] Figure 3 This is a schematic diagram of the structure of the tube changing trolley of the present invention;

[0021] Figure 4 This is a schematic diagram of the tube changing structure of the tube changing trolley of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the telescopic tube device of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the driving device of the present invention;

[0024] Figure 7 The structural schematic diagram of the fixing frame of the present invention is

[0025] In the figure: 1, pipe replacement trolley; 2, telescopic pipe device; 3, driving device; 4, rear supporting trailer; 5, pipe support 1; 6, fixed frame; 7, new mud pipe; 101, walking wheel assembly; 102, structural frame; 103, pipe support 2; 201, telescopic pipe outer sleeve; 202, flushing port; 203, telescopic pipe inner sleeve; 301, hydraulic motor assembly; 302, power gear; 303, rack; 601 fixed mud pipe 2; 602, fixed bracket; DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-Figure 7As shown, the present invention provides a large-diameter slurry pipeline pipe replacement device for a slurry shield machine, comprising a pipe replacement trolley 1, a telescopic pipe device 2, a driving device 3, a rear supporting trailer 4, a pipeline support 5, a fixing frame 6 and a new slurry pipe 7, wherein the pipe replacement trolley 1 is connected to the rear supporting trailer 4 and can reciprocate along the length direction of the rear supporting trailer 4; the telescopic pipe device 2 is arranged on the rear supporting trailer 4 and supported by the pipeline support 5, one end of the telescopic pipe device 2 is connected to the pipe replacement trolley 1, and the other end is connected to the fixing frame 6 through the pipeline support 5; the driving device 3 is installed at the lower part of the pipe replacement trolley 1, Used to drive the pipe-changing trolley 1; when the shield machine is excavating, the rear supporting trailer 4 drives the pipe-changing trolley 1 to move forward, the telescopic pipe device 2 extends, and the pipe-changing trolley 1 moves backward relative to the rear supporting trailer 4. When the pipe-changing trolley 1 moves to the tail of the rear trailer and reaches a pipe-changing distance, the shield machine stops excavating, stops conveying mud, drains the mud in the mud pipeline, cuts off the connection between the telescopic pipe device 2 and the fixed frame 6, and the pipe-changing trolley 1 moves to the initial state under the action of the driving device 3, the telescopic pipe device 2 retracts, and replaces with a new mud pipe 7 to realize the pipe-changing function of the mud pipeline. The fixed frame 6 is fixed to the trailer 4 by welding.

[0028] The pipe-changing trolley 1 comprises a walking wheel assembly 101, a structural frame 102 and a pipeline support 103, the pipeline support 103 and a fixed mud pipe 104, the pipeline support 1 5 is fixed by connecting the pipeline support 103 with bolts, and the fixed mud pipe 104 is fixed to the pipe-changing trolley at the same time, the pipeline support 103 is vertically welded to the structural frame 102, the pipeline support 103 supports the fixed mud pipe 104, the fixed mud pipe 104 is connected to one end of the telescopic pipe device 2 through a flange, and as the pipe-changing trolley 1 moves, the telescopic pipe device is extended, the walking wheel assembly 101 is arranged at both ends of the structural frame 102, the pipe-changing trolley 1 cooperates with the rear supporting trailer 4 through the walking wheel assembly 101, and moves back and forth along the length direction of the rear supporting trailer 4.

[0029] The telescopic tube device 2 is composed of an inner and outer double sleeve, including a telescopic tube outer sleeve 201, a flushing port 202 and a telescopic tube inner sleeve 203. The telescopic tube inner sleeve 203 is arranged in the telescopic tube outer sleeve 201 and can move relatively; the flushing port 202 is used to flush the residue brought by the mud in the telescopic tube outer sleeve 201, so as to facilitate the extension and overlap of the telescopic tube outer sleeve 201 and the telescopic tube inner sleeve 203.

[0030] The driving device 3 includes a hydraulic motor assembly 301, a power gear 302 and a rack 303. The hydraulic motor assembly 301 is arranged below the tube-changing trolley 1 to drive the power gear 302. The power gear 302 and the rack 303 are meshed. Driven by the hydraulic motor, the tube-changing trolley 1 is driven to reciprocate along the track within the travel range.

[0031] The fixing frame 6 includes a second fixed mud pipe 601 and a fixing bracket 602 . The second fixed mud pipe 601 is connected to the new mud pipe 7 via a flange to transport mud. The fixing bracket 602 supports the second fixed mud pipe 601 .

[0032] The tube changing device is installed on the side close to the rear of the rear supporting trailer 4 , and the tube changing trolley 1 , the telescopic tube device 2 and the fixing frame 6 are all arranged on the same side of the rear supporting trailer 4 .

[0033] The present invention also provides a pipe replacement method using the above-mentioned large-diameter slurry shield machine mud pipeline pipe replacement device, characterized in that it includes the following steps:

[0034] 1) Set the mud pipeline to bypass mode;

[0035] 2) In bypass mode, clean the mud pipe thoroughly with bentonite;

[0036] 3) Disconnect the fixed pipeline from the telescopic sleeve device and drain the mud;

[0037] 4) The rack and pinion drags the pipe-changing trolley 1 forward by the distance of a new mud pipe 7;

[0038] 5) docking the new mud pipe 7 with the casing in the telescopic pipe device 2;

[0039] 6) Restart slurry discharge and continue excavation.

[0040] The present invention adopts telescopic pipe to realize pipeline extension, has no elbow connection, and has very small pipeline pressure loss; it is convenient to connect new mud pipes; it has a large span and a long single pipe replacement stroke; the whole set of equipment is low in price, saves cost, has a simple structure and is easy to operate.

[0041] The above embodiments of the present invention are merely illustrative and not exclusive, and all modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A large diameter slurry shield machine mud pipeline replacement device, characterized in that: The invention comprises a pipe-changing trolley (1), a telescopic pipe device (2), a driving device (3), a rear supporting trailer (4), a pipeline support (5), a fixing frame (6) and a new mud pipe (7); the pipe-changing trolley (1) is connected to the rear supporting trailer (4) and can move back and forth along the length direction of the rear supporting trailer (4); the telescopic pipe device (2) is arranged on the rear supporting trailer (4) and supported by the pipeline support (5); one end of the telescopic pipe device (2) is connected to the pipe-changing trolley (1), and the other end is connected to the fixing frame (6) through the pipeline support (5); the driving device (3) is installed at the bottom of the pipe-changing trolley (1) and is used to drive the pipe-changing trolley (1) to move the pipe-changing trolley (1) and the fixing frame (6 ... ); when the shield machine is excavating, the rear supporting trailer (4) drives the pipe-changing trolley (1) to move forward, the telescopic pipe device (2) extends, and the pipe-changing trolley (1) moves backward relative to the rear supporting trailer (4). When the pipe-changing trolley (1) moves to the tail of the rear trailer and reaches a pipe-changing distance, the shield machine stops excavating, stops conveying mud, drains the mud in the mud pipeline, cuts off the connection between the telescopic pipe device (2) and the fixing frame (6), and the pipe-changing trolley (1) moves to the initial state under the action of the driving device (3), the telescopic pipe device (2) retracts, and replaces with a new mud pipe (7), thereby realizing the pipe-changing function of the mud pipeline. The fixing frame (6) is fixed to the trailer (4) by welding.

2. The large-diameter slurry pipeline replacement device for a slurry shield machine according to claim 1 is characterized in that: The pipe-changing trolley (1) comprises a walking wheel assembly (101), a structural frame (102), a second pipe support (103) and a fixed mud pipe (104). The first pipe support (5) is fixed by connecting the second pipe support (103) with bolts, and the fixed mud pipe (104) is fixed to the pipe-changing trolley at the same time. The second pipe support (103) is vertically welded to the structural frame (102). The second pipe support (103) supports the fixed mud pipe (104). The fixed mud pipe (104) is connected to one end of the telescopic pipe device (2) through a flange. As the pipe-changing trolley (1) moves, the telescopic pipe device (2) is extended. The walking wheel assembly (101) is arranged at both ends of the structural frame (102). The pipe-changing trolley (1) cooperates with the rear supporting trailer (4) through the walking wheel assembly (101) and reciprocates along the length direction of the rear supporting trailer (4).

3. The large-diameter slurry shield machine mud pipeline replacement device according to claim 1 is characterized in that: The telescopic tube device (2) is composed of an inner and outer double sleeve, including a telescopic tube outer sleeve (201), a flushing port (202) and a telescopic tube inner sleeve (203); the telescopic tube inner sleeve (203) is arranged in the telescopic tube outer sleeve (201) and can move relatively; the flushing port (202) is used to flush the residue brought by the mud in the telescopic tube outer sleeve (201), so as to facilitate the extension and overlap of the telescopic tube outer sleeve (201) and the telescopic tube inner sleeve (203).

4. The large diameter slurry shield machine mud pipeline replacement device according to claim 1, characterized in that: The driving device (3) comprises a hydraulic motor assembly (301), a power gear (302) and a rack (303); the hydraulic motor assembly (301) drives the power gear (302); the power gear (302) and the rack (303) mesh and drive the tube-changing trolley (1) to reciprocate along a track within a travel range.

5. The large-diameter slurry shield machine mud pipeline replacement device according to claim 1 is characterized in that: The fixing frame (6) comprises a second fixed mud pipe (601) and a fixing bracket (602). The second fixed mud pipe (601) is connected to the new mud pipe (7) via a flange to transport mud. The fixing bracket (602) supports the second fixed mud pipe (601).

6. The large-diameter slurry pipeline replacement device for a slurry shield machine according to any one of claims 1 to 4, characterized in that: The tube changing device is installed on the side close to the rear of the rear matching trailer (4), and the tube changing trolley (1), the telescopic tube device (2) and the fixing frame (6) are all arranged on the same side of the rear matching trailer (4).

7. A pipe replacement method for a large-diameter slurry pipe replacement device of a slurry shield machine according to any one of claims 1 to 6, characterized in that: The steps include: 1) Set the mud pipeline to bypass mode; 2) In bypass mode, clean the mud pipe thoroughly with bentonite; 3) Disconnect the fixed pipeline from the telescopic sleeve device and drain the mud; 4) The rack and pinion drags the tube-changing trolley (1) forward by the distance of a new mud tube (7); 5) docking the new mud pipe (7) with the casing in the telescopic pipe device (2); 6) Restart slurry discharge and continue excavation.

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