A TBM shield bottom slag cleaning system

Abstract

The present application relates to a kind of TBM shield bottom slag removal system, mainly by shield bottom push slag device, pump suction cleaning device, screw conveyor device is constituted, shield bottom push slag device is used to set in the bottom of TBM drive box, pump suction cleaning device is used to set below arch mounting machine operating platform, screw conveyor device is used to install in the rear of anchor rod drilling machine;Shield bottom push slag device includes bulldozing slag hopper, advance oil cylinder, pump suction cleaning device includes telescopic connecting rod, material collecting box, screw conveyor device includes conveyor main body and telescopic oil cylinder.The present application carries out shield bottom slag removal by mechanization means, on the one hand, using shield bottom push slag device and pump suction cleaning device suction residual in the rear of TBM cutterhead, small particle size of slag, on the other hand, by screw conveyor device, large particle size of crushed stone is transported to belt conveyor, comprehensively, efficiently, thoroughly realizes slag removal operation, reduces manual labor intensity, simultaneously solves the problem that the operation space below cutterhead to arch mounting machine operating platform is limited, not easy to slag removal.

Description

Technical Field

[0001] This invention relates to the field of TBM slag removal technology, and more specifically, to a TBM bottom slag removal system. Background Technology

[0002] During the tunneling process, TBMs often encounter situations such as fractured faults and support collapses. The cross-section of the tunnel after construction is generally circular, and the debris tends to accumulate at the bottom of the tunnel under gravity. It is necessary to remove the debris accumulated at the bottom of the tunnel to ensure the normal movement of the trailer trucks.

[0003] To adapt to the varying particle sizes of excavated soil generated during open-face TBM construction under different geological conditions, TBM slag removal devices have evolved from tipping bucket and belt conveyor types to a belt conveyor + bucket excavator type for application verification. Currently, the slag removal method for open-face TBMs involves installing a slag removal robotic arm at the tail of the main beam, primarily using manual slag removal supplemented by the robotic arm.

[0004] The disadvantages of the current slag removal method are as follows: (1) The labor intensity of slag removal in the tunnel is high and the efficiency of slag removal in the tunnel is low; (2) The space for movement between the cutterhead and the operating platform of the arch frame installation machine is small, and it is impossible to clean in time. Usually, the slag can only be cleaned after the TBM tunneling machine has excavated a certain distance; (3) Excavator slag removal can only clean slag with larger particle size, while slag with smaller particle size remains at the bottom of the tunnel. Summary of the Invention

[0005] The purpose of this invention is to propose a TBM bottom cleaning system that can solve the problems of low efficiency, high labor intensity and limited operating space of current cleaning methods.

[0006] The present invention provides the following technical solution: a TBM shield bottom cleaning system, mainly composed of a shield bottom slag pushing device, a pump suction cleaning device, and a screw conveyor device. The shield bottom slag pushing device is used to be installed at the bottom of the TBM drive box, the pump suction cleaning device is used to be installed below the arch frame installation machine operating platform, and the screw conveyor device is used to be installed behind the anchor drilling rig. The shield bottom slag pushing device includes a slag bucket and a propulsion cylinder. The two ends of the propulsion cylinder are connected to the bottom of the TBM drive box and the slag bucket, respectively. The slag bucket is pushed by the propulsion cylinder to the pump suction cleaning device. The pump suction cleaning device includes a telescopic connecting rod and a collection box. The two ends of the telescopic connecting rod are connected to the operating platform of the arch frame installation machine and the collection box, respectively. The collection box has an opening on the side facing the bulldozer hopper. The opposite sides of the collection box are respectively provided with a compressed liquid interface and a pump suction pipe interface. The compressed liquid interface is used to connect to a high-pressure water pump through a compressed liquid pipe. The pump suction pipe interface is connected to the pump suction station through a pump suction pipe. The pump suction pipe is used to transport the slag in the collection box to the belt conveyor of the TBM system under the action of the pump suction station. The screw conveyor includes a conveyor body and a telescopic hydraulic cylinder. The two ends of the telescopic hydraulic cylinder are connected to the anchor drilling rig and the conveyor body, respectively. The conveyor body is used to transport large-particle crushed stone to the belt conveyor of the TBM system.

[0007] Furthermore, the shield bottom slag pushing device also includes a guiding mechanism, which includes an outer sleeve and an inner rod that cooperate with the guide sleeve. The outer sleeve and the inner rod are respectively connected to the bottom of the TBM drive box and the slag hopper.

[0008] Furthermore, the compressed liquid pipe is sealed to the compressed liquid interface via a sealing ring and bolts.

[0009] Furthermore, the pump suction pipe comprises a three-layer structure: the inner layer is made of wear-resistant rubber, the middle layer is made of steel wire reinforcement, and the outer layer is made of corrosion-resistant rubber.

[0010] Beneficial effects: The slag removal process of the present invention is as follows: The present invention has two working modes: (1) When water accumulates at the bottom of the shield, the propulsion cylinder drives the bulldozer bucket to push the slag into the collection box, the propulsion cylinder retracts to the initial position, and the pump suction pipe extracts the slag and water mixture through the pump suction pipe interface; (2) When there is little or no water accumulation at the bottom of the shield, the propulsion cylinder drives the bulldozer bucket to push the slag into the collection box, so that the propulsion cylinder maintains the top extension state, the bulldozer bucket and the collection box are kept in a sealed state, the high pressure water pump injects water into the collection box through the compressed liquid pipe, and after the collection box is filled with water and slag, the slag mixture is extracted through the pump suction pipe; the pump suction pipe pumps the slag mixture to the belt conveyor on both sides of the TBM shield machine or the center of the main beam, and the spiral conveyor removes the slag mixture that the pump suction cleaning device failed to clean. Large-diameter crushed stone is conveyed to a belt conveyor and then transported away. For larger-diameter slag (D > 20mm), it is cleaned through a slag removal system under the equipment bridge or rear support at the bottom of the arch (both existing slag removal methods). The main principle of this invention's slag removal process is to use high-pressure viscous liquid to carry away smaller-diameter slag, replacing manual labor with mechanized operation. This significantly improves the problem of high labor intensity in slag removal. It has two working modes for different operating conditions, exhibiting strong environmental adaptability. A bottom slag pushing device is installed to solve the problem of limited operating space and difficulty in cleaning slag accumulated behind the TBM cutterhead. Different cleaning methods are set for slag or crushed stone of different diameters and materials, resulting in good cleaning effect, high slag removal efficiency, and a more thorough cleaning. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a specific embodiment 1 of the TBM bottom cleaning system of the present invention; Figure 2 This is a schematic diagram of the shield bottom slag pushing device in a specific embodiment 1 of the TBM shield bottom slag removal system of the present invention; Figure 3 This is a schematic diagram of the pump suction cleaning device in a specific embodiment 1 of the TBM bottom cleaning system of the present invention; Figure 4 This is a schematic diagram of the screw conveyor in a specific embodiment 1 of the TBM bottom cleaning system of the present invention; Reference numerals: 1-TBM cutterhead; 2-TBM shield; 3-TBM drive box; 4-arch frame installation machine; 5-shield bottom slag pushing device; 501-propulsion cylinder; 502-bulldozer hopper; 503-guide mechanism; 6-pump suction cleaning device; 601-collection box; 602-telescopic connecting rod; 603-pump suction pipe interface; 604-compressed liquid interface; 605-pump suction pipe; 606-joint clamp; 607-compressed liquid... Liquid pipe; 608-Flange; 7-Anchor drilling rig; 8-Advanced drilling rig; 9-No. 1 belt conveyor; 10-Rear support; 11-No. 2 belt conveyor; 12-High-pressure water pump and pump suction station; 13-Slag outlet; 14-Screw conveyor device; 1401-Conveyor inlet; 1402-Conveyor drive mechanism; 1403-Screw blade; 1404-Conveyor casing; 1405-Conveyor outlet; 1406-Telescopic cylinder. Detailed Implementation

[0012] The present invention will now be described in detail with reference to the accompanying drawings.

[0013] Specific embodiment 1 of the TBM bottom cleaning system of the present invention: like Figure 1 As shown, this invention is applied in a TBM system, which includes a TBM cutterhead 1, a TBM shield 2, a TBM drive unit 3, an arch frame installer 4, an anchor drilling rig 7, an advanced drilling rig 8, a No. 1 belt conveyor 9, a rear support 10, and a No. 2 belt conveyor 11. This TBM shield bottom cleaning system mainly consists of a shield bottom slag pushing device 5, a pump suction cleaning device 6, and a screw conveyor 14. The shield bottom slag pushing device 5 is located at the bottom of the TBM drive unit, and its connection methods include, but are not limited to, riveting and welding. The pump suction cleaning device 6 is installed below the operating platform of the arch frame installer 4 and is fixed to the steel support inside the operating platform of the arch frame installer 4 by bolts and welding. The screw conveyor is installed behind the anchor drilling rig 7.

[0014] The specific structure of the shield bottom slag pusher device 5 is as follows: Figure 2 As shown, the device includes a bulldozer bucket 502, a propulsion cylinder 501, and a guiding mechanism 503. Both the propulsion cylinder 501 and the guiding mechanism 503 are connected between the bulldozer bucket 502 and the bottom of the TBM drive box 3. The propulsion cylinder 501 pushes the bulldozer bucket 502 to push the excavated soil accumulated behind the TBM cutterhead towards the underside of the main beam in zone L1. The guiding mechanism 503 includes an outer sleeve and an inner rod that fit into a guide sleeve. Both ends of the guiding mechanism 503, namely the outer sleeve and the inner rod, are connected to the bottom of the TBM drive box 3 and the bulldozer bucket 502, respectively, ensuring the stability of the bulldozer bucket's movement under the action of the propulsion cylinder.

[0015] like Figure 3As shown, the pump suction cleaning device 6 includes a telescopic connecting rod 602 and a collection box 601. The two ends of the telescopic connecting rod 602 are connected to the operating platform of the arch frame installation machine 4 and the collection box 601, respectively. The position of the collection box 601 can be adjusted via the telescopic connecting rod 602. The collection box 601 has an opening on the side facing the bulldozer hopper. A compressed liquid interface 604 and a pump suction pipe interface 603 are respectively provided on opposite sides of the collection box 602. The high-pressure water pump and pump suction station 12 are the source components connected to the collection box 602. The compressed liquid interface 604 is connected to the high-pressure water pump via a compressed liquid pipe 607. The compressed liquid pipe 607 is a steel pipe. A sealing ring is provided at the interface of the compressed liquid pipe 607 connecting to the compressed liquid interface 604, and the pipe is sealed to the compressed liquid interface 604 via a flange 608 and bolts. During use, after the high-pressure water pump is turned on, liquid can be injected into the collection box 601 through the compressed liquid pipe 607. The pump suction pipe 605 comprises a three-layer structure: an inner layer of wear-resistant rubber, a middle layer of steel wire reinforcement, and an outer layer of corrosion-resistant rubber. The pump suction pipe 605 is connected to the pump suction pipe connector 603 via a connector clamp 606. When the pump suction cleaning device 6 is in operation: the mud-water mixture in the collection box 601 is pumped through the pump suction pipe 605 to the slag outlet 13 by the pump suction station, and then discharged through the slag outlet 13 onto the No. 2 belt conveyor 11 on both sides of the TBM or in the center of the main beam, and then transported out of the tunnel.

[0016] The specific structure of the screw conveyor is as follows: Figure 4 As shown, the system mainly consists of a conveyor body and a telescopic hydraulic cylinder 1406. The telescopic hydraulic cylinder 1406 is connected at both ends to the anchor drilling rig 7 and the top of the conveyor body, respectively. The conveyor body includes a conveyor housing 1404, spiral blades 1403, and a conveyor drive mechanism 1402. The spiral blades 1403 are located inside the conveyor housing 1404, while the conveyor drive mechanism 1402 is installed outside the conveyor housing 1404 to drive the spiral blades 1403 for transportation. Conveyor inlets 1401 and 1405 are respectively located at both ends of the conveyor housing 1404. The main function of the spiral conveyor is to transport large particles of gravel that cannot be handled by the pump suction cleaning device via the spiral blades 1403 to the conveyor inlet 1405, then to the No. 1 belt conveyor 9, and finally transported to the outside of the tunnel by the belt conveyor unit.

[0017] This invention has two working modes: When water accumulates at the bottom of the shield, the propulsion cylinder drives the bulldozer bucket to push the excavated soil into the collection box. The propulsion cylinder then retracts to its initial position, and the pump suction pipe extracts the mud-water mixture of excavated soil and water through the pump suction pipe interface.

[0018] When there is little or no water accumulation at the bottom of the shield, the propulsion cylinder drives the bulldozer bucket to push the slag into the collection box, keeping the propulsion cylinder in an extended position. The bulldozer bucket and the collection box remain sealed. The high-pressure water pump injects water into the collection box through the compressed liquid pipe. After the collection box is filled with water and slag, the mud-water mixture is extracted through the pump suction pipe.

[0019] The pump suction pipe draws the mud-water mixture to the belt conveyors on both sides of the TBM shield machine or in the center of the main beam. Simultaneously, a screw conveyor transports large-diameter gravel that the pump suction cleaning device fails to remove to the belt conveyor, which then transports it outside the tunnel. In this invention, the pump suction cleaning device 6 primarily cleans small-diameter slag, accumulated water, silt, and other fluid waste. For larger-diameter slag (D > 20 mm), cleaning is performed through the slag removal system under the equipment bridge at the arch bottom or on the rear support (both existing slag removal methods). The main principle is to use high-pressure viscous liquid flow to carry away smaller-diameter slag. This invention replaces manual slag removal with mechanized slag removal, reducing labor intensity and improving slag removal efficiency. It includes two working modes and has a certain degree of environmental adaptability. A bottom slag pushing device is set at the bottom of the TBM drive box, which ensures thorough and efficient slag removal and solves the problem of limited operating space and difficulty in slag removal behind the TBM cutterhead. Smaller slag particles are removed by a pump suction cleaning device to prevent small slag particles from remaining at the bottom of the shield after slag removal. The slag is transported to the outside of the tunnel by the main beam belt conveyor or the belt conveyors on both sides, without occupying the transportation channel in the center of the tunnel bottom, providing more transportation space for the subsequent assembly of the invert arch precast blocks and the steel arch frame.

[0020] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A TBM (Tunnel Boring Machine) bottom cleaning system, characterized in that, It mainly consists of a shield bottom slag pushing device, a pump suction cleaning device, and a screw conveyor device. The shield bottom slag pushing device is installed at the bottom of the TBM drive box, the pump suction cleaning device is installed below the arch frame installation machine operating platform, and the screw conveyor device is installed behind the anchor drilling rig. The shield bottom slag pushing device includes a slag bucket and a propulsion cylinder. The two ends of the propulsion cylinder are connected to the bottom of the TBM drive box and the slag bucket, respectively. The slag bucket is pushed by the propulsion cylinder to the pump suction cleaning device. The pump suction cleaning device includes a telescopic connecting rod and a collection box. The two ends of the telescopic connecting rod are connected to the operating platform of the arch frame installation machine and the collection box, respectively. The collection box has an opening on the side facing the bulldozer hopper. The opposite sides of the collection box are respectively provided with a compressed liquid interface and a pump suction pipe interface. The compressed liquid interface is used to connect to a high-pressure water pump through a compressed liquid pipe. The pump suction pipe interface is connected to the pump suction station through a pump suction pipe. The pump suction pipe is used to transport the slag in the collection box to the belt conveyor of the TBM system under the action of the pump suction station. The screw conveyor includes a conveyor body and a telescopic cylinder. The two ends of the telescopic cylinder are connected to the anchor drilling rig and the conveyor body, respectively. The screw conveyor transports large-diameter gravel that the pump suction cleaning device cannot clean to the belt conveyor of the TBM system.

2. The TBM shield bottom cleaning system as described in claim 1, characterized in that, The shield bottom slag pushing device also includes a guiding mechanism, which includes an outer tube and an inner rod that cooperate with the guide sleeve. The outer tube and the inner rod are respectively connected to the bottom of the TBM drive box and the slag hopper.

3. A TBM bottom cleaning system as described in claim 1 or 2, characterized in that, The compressed liquid pipe is sealed to the compressed liquid interface through a sealing ring and bolts.

4. A TBM bottom cleaning system as described in claim 1 or 2, characterized in that, The pump suction pipe has a three-layer structure: the inner layer is made of wear-resistant rubber, the middle layer is made of steel wire reinforcement, and the outer layer is made of corrosion-resistant rubber.

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