Device for dredging central flushing pipe of slurry shield

Abstract

The utility model discloses a device for dredging a central flushing pipe of a slurry shield, which comprises a walking part, a high-pressure flushing part, a rotary friction part and a flexible water supply pipeline, the walking part comprises a hollow shell, and a plurality of walking wheels are annularly arranged on the outer ring of the hollow shell at intervals so as to be attached to the inner wall of the flushing pipe to walk; the flexible water supply pipeline penetrates through the hollow shell of the walking part and is communicated with the high-pressure washing part positioned at the front end of the walking part; the high-pressure washing part comprises a conical head, a plurality of inclined spray heads are arranged on the conical head at intervals in the annular direction, and the inclined spray heads obliquely point to the rear portion; the rotating friction part is arranged on the outer wall face of the front portion of the walking part and comprises a driving mechanism, a rotating part arranged on an output shaft of the driving mechanism in a sleeving mode and a steel wire ball fixed to the rotating part. The pipeline dredging device has the advantages that the pipeline dredging device can freely walk in a bent flushing pipeline, double dredging of high-pressure flushing and scrubbing is achieved, and the dredging efficiency is high.

Description

Technical Field

[0001] This utility model relates to a pipe cleaning device, specifically a device for unclogging the central flushing pipe of a mud-water shield tunnel. Background Technology

[0002] The working principle of a slurry shield tunneling machine involves installing a partition wall at the front of the shield, along with face cutters, a slurry discharge pipe for conveying fluid, and jacks to propel the shield. A slurry separation plant is located on the ground. By supplying slurry into the chamber, an impermeable mud film is formed at the working face, generating slurry pressure that counteracts the earth and water pressure at the working face, thus maintaining stability. Simultaneously, the excavated soil and slurry are discharged to the ground in fluid form. A slurry treatment device separates the soil particles from the slurry. The remaining slurry, after quality adjustment, is then sent back to the working face for recycling.

[0003] During tunneling, the cutterhead of a slurry shield tunneling machine is prone to accumulating mud cake. This phenomenon is particularly severe in cohesive strata such as silty sandstone and silty clay. Mud cake increases the load on the cutterhead and cutting tools, leading to accelerated wear and tear, increased tool consumption, and in severe cases, rendering the cutterhead unable to cut. This poses a significant threat to tunneling speed and construction safety, and delays the construction schedule. To address this, flushing pipelines are installed to clean the cutterhead and reduce mud cake formation.

[0004] However, flushing pipes are also prone to blockage by mud during use. Once blocked, the flushing pipes need to be cleared in time, otherwise the problem of mud cake formation will be further aggravated. However, the current method of clearing blockages in flushing pipes usually involves manual cleaning or manually inserting tools into the pipes to clear the blockages. This is cumbersome, and due to the complex installation of the pipes and the winding path of the pipe extension, the traditional manual cleaning method cannot effectively clear the blockages in the flushing pipes.

[0005] Therefore, those skilled in the art urgently need a device that can automatically unclog and flush pipelines. Summary of the Invention

[0006] The purpose of this utility model is to provide a device for unclogging the central flushing pipe of a slurry shield tunnel, which addresses the shortcomings of the prior art. This device travels along the inner wall of the flushing pipe via a traveling section, and achieves high-pressure flushing and scrubbing of the mud and dirt on the inner wall of the pipe by setting a high-pressure flushing section and a rotating friction section. It also adapts to the curved flushing pipe by using a flexible water supply pipe.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A device for unclogging the central flushing pipe of a slurry shield tunneling machine, characterized in that the device includes a traveling section, a high-pressure flushing section, a rotating friction section, and a flexible water supply pipeline. The traveling section includes a hollow shell, and a plurality of traveling wheels are circumferentially spaced around the outer ring of the hollow shell to travel in contact with the inner wall of the flushing pipe. The flexible water supply pipeline passes through the hollow shell of the traveling section and is connected to the high-pressure flushing section located at the front end of the traveling section. The high-pressure flushing section includes a conical head, and a plurality of oblique nozzles are circumferentially spaced around the conical head, the oblique nozzles pointing backward. The rotating friction section is disposed on the front outer wall of the traveling section and includes a drive mechanism, a rotating part mounted on the output shaft of the drive mechanism, and a steel wool ball fixed on the rotating part.

[0009] The front part of the hollow shell is provided with a plurality of drive mechanisms spaced circumferentially. The drive mechanisms are arranged radially, and the main body of the drive mechanism is located in the hollow shell. The output shaft of the drive mechanism protrudes from the outer wall surface of the hollow shell and is keyed to the rotating part.

[0010] A spring wheel frame is provided between the running wheels and the outer wall of the hollow shell. The spring wheel frame includes a fixed frame and a movable frame that can slide against each other. A spring is provided between the movable frame and the outer wall of the hollow shell.

[0011] The conical head of the high-pressure flushing section has a convex disc that fits against the front end face of the hollow shell. The flexible water supply pipeline has a flange that is threadedly fastened to the rear end face of the hollow shell.

[0012] The advantages of this invention are: it can move freely in the curved flushing pipe, achieving dual unblocking through high-pressure flushing and scrubbing, resulting in high unblocking efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the device used for unblocking the central flushing pipe of a slurry shield tunnel in this utility model.

[0014] Figure 2 This utility model Figure 1 A magnified view of part A in the diagram;

[0015] like Figure 1-2 The markings in the figure are as follows: 1. Traveling part; 2. Spring wheel frame; 21. Traveling wheel; 22. Fixed frame; 23. Movable frame; 24. Spring; 3. Rotating friction part; 31. Drive mechanism; 32. Rotating part; 33. Steel wool ball; 34. Output shaft; 4. Flexible water supply pipeline; 5. High-pressure flushing part; 6. Flange; 7. Angled nozzle; 8. Flushing pipe; 9. Detailed Implementation

[0016] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0017] Example: Figure 1 , 2 As shown, this embodiment specifically relates to a device for unclogging the central flushing pipe of a slurry shield tunnel, including a traveling part 1, a high-pressure flushing part 5, a rotating friction part 3, and a flexible water supply pipeline 4.

[0018] like Figure 1 , 2 As shown, the main body of the traveling section 1 is a hollow shell, the hollow part of which allows the flexible water supply pipe 4 to pass through. Multiple spring wheel frames 2 are arranged circumferentially on the rear outer wall of the hollow shell. Each spring wheel frame 2 includes a fixed frame 22 and a movable frame 23 that can slide against each other. The fixed frame 22 is fixed to the outer wall of the hollow shell and has a sliding groove. The movable frame 23 is inserted into the sliding groove of the fixed frame 22 to achieve mutual sliding. A spring 24 is provided between the inner end of the movable frame 23 and the hollow shell, and a traveling wheel 21 is fixedly provided at the outer end of the movable frame 23. The rebound performance of the spring 24 ensures that the traveling wheel 21 always fits against the inner wall of the flushing pipe 9.

[0019] like Figure 1 , 2 As shown, the rotating friction part 3 is disposed on the front outer wall of the traveling part 1, including a drive mechanism 31, a rotating part 32 mounted on the output shaft 34 of the drive mechanism 31, and a steel wool ball 33 fixed on the rotating part 32. The hollow shell has a certain thickness. The drive mechanism 31 is arranged radially in the hollow shell, and the output shaft 34 of the drive mechanism 31 protrudes from the outer wall of the hollow shell. The end of the output shaft 34 is keyed to the rotating part 32, and a ball of steel wool ball 33 is fixed on the rotating part 32. In this embodiment, the drive mechanism 31 is arranged in a ring around the hollow shell to ensure that the ring can be scrubbed without dead angles. The drive mechanism 31 is specifically a motor. The steel wool ball 33 has a certain compressibility, so it can ensure that it can adhere to the inner wall and rotate to scrub away dirt even in the curved path of the flushing pipe 3.

[0020] like Figure 1 , 2As shown, the flexible water supply pipeline 4 passes through the hollow shell and connects to the high-pressure flushing section 5. The main body of the high-pressure flushing section 5 is a conical head, with a ring of angled nozzles 8 spaced circumferentially on the conical head. The angled nozzles 8 point backward to achieve inclined high-pressure flushing of the mud on the inner wall of the pipeline 9. It should be noted that a ring-shaped convex plate 7 is provided at the rear end of the conical head, which can abut against the front end face of the hollow shell 1. A flange 6 is also provided on the flexible water supply pipeline 4. By threading the flange 6 onto the rear end face of the hollow shell, the high-pressure flushing section 5 and the flexible water supply pipeline 4 are secured to the hollow shell. During operation, pushing and pulling the flexible water supply pipeline 4 can drive the traveling part 1 and the high-pressure flushing section 5 to move back and forth. During the removal of mud cake, high-pressure water flushes the inner wall of the pipe, and rotating steel wool 33 assists in scrubbing, thereby effectively cleaning the inner wall of the flushing pipe 9. It should be noted that the end of the flexible water supply pipeline 4 is pumped by a high-pressure pump.

[0021] The advantages of this invention are: it can move freely in the curved flushing pipe, achieving dual unblocking through high-pressure flushing and scrubbing, resulting in high unblocking efficiency.

Claims

1. A device for unclogging the central flushing pipe of a slurry shield tunnel, characterized in that... The device includes a traveling section, a high-pressure flushing section, a rotating friction section, and a flexible water supply pipeline. The traveling section includes a hollow shell, and a plurality of traveling wheels are arranged circumferentially around the outer ring of the hollow shell to travel in contact with the inner wall of the flushing pipe. The flexible water supply pipeline passes through the hollow shell of the traveling section and is connected to the high-pressure flushing section located at the front end of the traveling section. The high-pressure flushing section includes a conical head, and a plurality of angled nozzles are arranged circumferentially around the conical head, with the angled nozzles pointing backward. The rotating friction section is disposed on the front outer wall of the traveling section and includes a drive mechanism, a rotating part mounted on the output shaft of the drive mechanism, and a steel wool ball fixed on the rotating part.

2. The device for unblocking the central flushing pipe of a slurry shield tunnel according to claim 1, characterized in that... The front part of the hollow shell is provided with a plurality of drive mechanisms spaced circumferentially. The drive mechanisms are arranged radially, and the main body of the drive mechanism is located in the hollow shell. The output shaft of the drive mechanism protrudes from the outer wall surface of the hollow shell and is keyed to the rotating part.

3. The device for unblocking the central flushing pipe of a slurry shield tunnel according to claim 1, characterized in that... A spring wheel frame is provided between the running wheels and the outer wall of the hollow shell. The spring wheel frame includes a fixed frame and a movable frame that can slide against each other. A spring is provided between the movable frame and the outer wall of the hollow shell.

4. The device for unblocking the central flushing pipe of a slurry shield tunnel according to claim 1, characterized in that... The conical head of the high-pressure flushing section has a convex disc that fits against the front end face of the hollow shell. The flexible water supply pipeline has a flange that is threadedly fastened to the rear end face of the hollow shell.

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