A system for improving the spoil of a shield machine cutter head

Abstract

The application discloses a shield machine cutter head muck improvement system, which comprises a cutter head and a partition plate arranged behind the cutter head, a soil cabin is formed between the cutter head and the partition plate, a plurality of valve bodies and a plurality of pipelines are arranged on the partition plate, one end of each pipeline is connected with the outlet end of each valve body in one-to-one correspondence, the other end of each pipeline is respectively connected with a discharge pipe, a nozzle is arranged at the discharge end of the discharge pipe, the nozzles of a part of the discharge pipes are located at the gap between the cutter head and the top of the partition plate, the nozzles of the other part of the discharge pipes are located at the upper part in the soil cabin, a plurality of feeding devices for supplying different materials are arranged behind the partition plate, the inlet end of each valve body is connected with the corresponding feeding device, the shield machine cutter head muck improvement system further comprises a control module, each valve body is electrically connected with the control module, and the control module opens or closes the valve body according to an instruction. The shield machine cutter head muck improvement system has multiple functions, is not prone to be blocked and worn, and has a prolonged service life, improved tunneling efficiency and improved automation degree.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine technology, and more specifically to a tunnel boring machine cutterhead soil improvement system. Background Technology

[0002] Most underground tunnel construction projects use tunnel boring machines (TBMs). The front face of the TBM is equipped with a cutterhead, and a partition is located behind the cutterhead, forming a soil chamber between the cutterhead and the partition. To improve the excavated soil, a foam device is generally installed on the cutterhead to improve the soil cut by the cutterhead. For example, Chinese patent application number 201220638697.1 discloses a tunnel construction machinery device, specifically involving a soil improvement foam device for a TBM, including a foam nozzle, a foam tube seat, a foam tube, and a tee. The horizontal section of the foam tube is connected to the foam inlet pipe via the tee. The front end of the horizontal foam tube is connected to the foam nozzle via the foam tube seat. A sealing block is located at the rear end of the horizontal foam tube. The foam nozzle consists of a steel pressure plate and a nylon plate located behind the steel pressure plate, fixed to the foam tube seat. A gasket is provided between the nylon plate and the foam tube seat, and a cross groove is provided on the foam plate. This tunnel construction machinery device has the following shortcomings: 1) During the construction process, the slag cut by the cutterhead in the composite strata at the tunnel face is squeezed and ground, resulting in gravelly slag. This causes the foam device to frequently become clogged and unable to produce foam, and wear out. Long-term non-use of foam has a significant impact on the tunneling efficiency of the shield tunnel and the wear of the cutterhead. 2) The foam device can only be used to spray foam in front of the cutterhead. It has a single function and cannot meet the requirements of adding water to the soil chamber and establishing a mud film at the working face. 3) The overall level of automation is low and the efficiency is poor. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a shield machine cutterhead soil improvement system that is multifunctional, not prone to clogging and wear, and improves service life, tunneling efficiency and automation.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A tunnel boring machine (TBM) cutterhead muck improvement system includes a cutterhead and a partition plate located behind the cutterhead, forming a muck chamber between the cutterhead and the partition plate. The partition plate is equipped with multiple valve bodies and multiple pipes. One end of each pipe is connected to the outlet end of a corresponding valve body, and the other end of each pipe is connected to a discharge pipe. The discharge end of each discharge pipe is equipped with a nozzle; some nozzles are located in the gap between the cutterhead and the top of the partition plate, while others are located in the upper part of the muck chamber. Behind the partition plate are multiple feeding devices for supplying different materials. The inlet end of each valve body is connected to a corresponding feeding device. The TBM cutterhead muck improvement system also includes a control module, with each valve body electrically connected to the control module. The control module opens and closes the valve bodies according to commands.

[0005] As a further improvement to the above technical solution: The specifications of the valve bodies vary.

[0006] The valve body is a ball valve.

[0007] The pipe is fixed to the partition by fasteners.

[0008] The pipeline is located on the side of the partition facing the soil chamber.

[0009] The pipes are distributed within a 120° range above the partition.

[0010] The depth of the soil chamber is set as h, and the nozzle located at the upper part of the soil chamber is 2 / 3h away from the bottom surface of the soil chamber.

[0011] The discharge pipe is an alloy steel pipe.

[0012] The inlet end of the valve body is connected to the corresponding feeding device via a hose.

[0013] The two ends of the pipe are connected to the discharge pipe and the valve body respectively via elbows.

[0014] Compared with the prior art, the advantages of the present invention are as follows: When the shield tunneling machine cutterhead soil improvement system of the present invention is in operation, the shield tunneling construction team selects a reasonable pipeline mode according to the construction conditions. If it is necessary to establish a mud film at the tunnel face, the control module receives an instruction to open the valve body connected to the feeding device for supplying bentonite, and sprays bentonite onto the tunnel face outside the cutterhead through the corresponding nozzles between the cutterhead and the top of the partition plate to form a mud film. During normal tunneling, the control module receives an instruction to open the valve body connected to the feeding device for supplying foaming agent, and sprays foam onto the tunnel face outside the cutterhead through the corresponding nozzles between the cutterhead and the top of the partition plate to reduce wear, protect the cutterhead of the shield tunneling machine, reduce wear, and improve construction efficiency. In addition, foam can also be sprayed onto the soil in the soil chamber through the corresponding nozzles in the upper part of the soil chamber to improve the fluidity of the soil and facilitate its external transportation. In soft soil strata with high cohesion, when the water supply in the shield tunneling machine's soil chamber is insufficient, the control module receives an instruction to open the valve body connected to the feeding device for supplying water, and adds water into the soil chamber through the corresponding nozzles in the upper part of the soil chamber. Firstly, the nozzles are not located on the cutterhead, making them less prone to clogging and wear, thus improving service life and tunneling efficiency. Secondly, they are multifunctional, capable of meeting requirements such as spraying bentonite, spraying foam, and adding water. Thirdly, the control module controls the opening and closing of corresponding valves to meet the supply of necessary materials, improving automation and construction efficiency. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural schematic diagram of the shield tunneling machine cutterhead muck improvement system of the present invention.

[0016] Figure 2 This is another cross-sectional structural schematic diagram of the shield tunneling machine cutterhead soil improvement system of the present invention.

[0017] Figure 3 This is a schematic diagram of the inner structure of the cutterhead of the tunnel boring machine cutterhead soil improvement system of the present invention.

[0018] The labels in the diagram represent: 1. Cutter head; 2. Baffle plate; 3. Soil chamber; 4. Valve body; 5. Pipeline; 51. Fixture; 6. Discharge pipe; 7. Nozzle; 8. Hose; 9. Elbow. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Figures 1 to 3 This invention illustrates an embodiment of the tunnel boring machine cutterhead soil improvement system. The system includes a cutterhead 1 and a partition 2 located behind the cutterhead 1, forming a soil chamber 3 between the cutterhead 1 and the partition 2. The partition 2 has multiple valve bodies 4 and multiple pipes 5. One end of each pipe 5 is connected to the outlet end of each valve body 4, and the other end of each pipe 5 is connected to a discharge pipe 6. The discharge end of each discharge pipe 6 has a nozzle 7. Some of the nozzles 7 of the discharge pipes 6 are located in the gap between the top of the cutterhead 1 and the partition 2, while the nozzles 7 of other discharge pipes 6 are located in the upper part of the soil chamber 3. Multiple feeding devices for supplying different materials are located behind the partition 2. The inlet end of each valve body 4 is connected to the corresponding feeding device. The tunnel boring machine cutterhead soil improvement system also includes a control module. Each valve body 4 is electrically connected to the control module, which switches the valve bodies 4 according to instructions.

[0024] During operation of the tunnel boring machine (TBM) cutterhead muck preparation system, the TBM construction team selects a suitable pipeline mode based on the construction conditions. If a mud film needs to be established at the tunnel face, the control module receives a command to open valve 4, which is connected to the bentonite supply device. Bentonite is then sprayed onto the tunnel face outside the cutterhead 1 through nozzles 7 corresponding to the top of the cutterhead 1 and the partition plate 2, forming a mud film. During normal tunneling, the control module receives a command to open valve 4, which is connected to the foaming agent supply device. Bentonite is then sprayed onto the tunnel face outside the cutterhead 1 through nozzles 7 corresponding to the top of the cutterhead 1 and the partition plate 2, forming a mud film. The corresponding nozzles 7 between the sections spray foam onto the outer face of the cutterhead 1 to reduce wear, protect the cutterhead 1 of the tunnel boring machine, reduce wear, and improve construction efficiency. In addition, foam can also be sprayed onto the excavated soil in the soil chamber 3 through the corresponding nozzles 7 at the top of the soil chamber 3 to improve the fluidity of the excavated soil and facilitate its external transportation. In soft soil strata with high cohesion, when the water supply in the soil chamber of the tunnel boring machine is insufficient, the control module receives a command to open the valve body 4 connected to the water supply device, and adds water into the soil chamber 3 through the corresponding nozzles 7 at the top of the soil chamber 3.

[0025] This tunnel boring machine cutterhead soil improvement system has several advantages. First, the nozzles 7 are not located on the cutterhead 1, making them less prone to clogging and wear, thus improving service life and tunneling efficiency. Second, it has multiple functions, including spraying bentonite, spraying foam, and adding water. Third, the control module controls the opening and closing of the corresponding valve body 4 to ensure the supply of necessary materials, thereby improving automation and construction efficiency.

[0026] Furthermore, in this embodiment, valve body 4 is a ball valve, specifically an electric ball valve, which facilitates control of the switch.

[0027] Furthermore, in this embodiment, the pipe 5 is fixed to the partition 2 by fasteners 51. Preferably, multiple fasteners 51 are provided, arranged along the length of the pipe 5, i.e., one is provided at appropriate intervals. More preferably, the fasteners 51 are positioned by locking pins. Both the fasteners 51 and the pipe 5 can be welded to the partition 2.

[0028] Furthermore, in this embodiment, the pipe 5 is located on the side of the partition 2 facing the soil chamber 3, which facilitates installation.

[0029] Furthermore, in this embodiment, as Figure 3 As shown, pipes 5 are distributed within a 120° range above the partition 2.

[0030] Furthermore, in this embodiment, the depth of the soil chamber 3 is set to h, and the nozzle 7 located at the upper part of the soil chamber 3 is 2 / 3h away from the bottom surface of the soil chamber 3, which helps to prevent soil from entering the nozzle 7 and causing the nozzle 7 to become clogged.

[0031] Furthermore, in this embodiment, the discharge pipe 6 is made of alloy steel, which is of high quality and durable.

[0032] Furthermore, in this embodiment, the inlet end of the valve body 4 is connected to the corresponding feeding device via a flexible hose 8.

[0033] Furthermore, in this embodiment, both ends of the pipe 5 are connected to the discharge pipe 6 and the valve body 4 respectively via elbows 9. Preferably, the nozzle 7 is made of copper alloy, and the hose 8 is made of high-pressure rubber.

[0034] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A soil improvement system for a tunnel boring machine cutterhead, comprising a cutterhead (1) and a partition plate (2) disposed behind the cutterhead (1), wherein a soil chamber (3) is formed between the cutterhead (1) and the partition plate (2), characterized in that: The partition (2) is provided with multiple valve bodies (4) and multiple pipes (5). One end of each pipe (5) is connected to the outlet end of each valve body (4) in a corresponding manner. The other end of each pipe (5) is connected to a discharge pipe (6). The discharge end of the discharge pipe (6) is provided with a nozzle (7). The nozzle (7) of a part of the discharge pipe (6) is located in the gap between the cutter head (1) and the top of the partition (2). The nozzle (7) of another part of the discharge pipe (6) is located in the upper part of the soil chamber (3). Multiple feeding devices for supplying different materials are provided behind the partition (2). The inlet end of each valve body (4) is connected to the corresponding feeding device. The shield machine cutter head soil improvement system also includes a control module. Each valve body (4) is electrically connected to the control module. The control module switches the valve body (4) according to the command.

2. The shield machine cutterhead muck improvement system according to claim 1, characterized in that: The specifications of the valve bodies (4) are different.

3. The shield tunneling machine cutterhead muck improvement system according to claim 1, characterized in that: The valve body (4) is a ball valve.

4. The shield tunneling machine cutterhead muck improvement system according to claim 1, characterized in that: The pipe (5) is fixed to the partition (2) by a fastener (51).

5. The shield tunneling machine cutterhead muck improvement system according to claim 1, characterized in that: The pipe (5) is located on the side of the partition (2) facing the soil chamber (3).

6. The shield tunneling machine cutterhead muck improvement system according to claim 1, characterized in that: The pipe (5) is distributed within a 120° range above the partition (2).

7. The shield tunneling machine cutterhead muck improvement system according to any one of claims 1 to 6, characterized in that: The depth of the soil chamber (3) is set to h, and the nozzle (7) located in the upper part of the soil chamber (3) is 2 / 3h away from the bottom surface of the soil chamber (3).

8. The shield tunneling machine cutterhead muck improvement system according to any one of claims 1 to 6, characterized in that: The discharge pipe (6) is an alloy steel pipe.

9. The shield tunneling machine cutterhead muck improvement system according to any one of claims 1 to 6, characterized in that: The inlet end of the valve body (4) is connected to the corresponding feeding device via a hose (8).

10. The shield tunneling machine cutterhead muck improvement system according to any one of claims 1 to 6, characterized in that: The two ends of the pipe (5) are connected to the discharge pipe (6) and the valve body (4) respectively through elbows (9).

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