Slurry shield crushing and deslagging system

Abstract

The utility model relates to the technical field of shield tunneling machines, in particular to a slurry shield crushing and deslagging system which comprises a cutterhead, a slurry cabin, a spiral shaft, a spiral conveyor, a connecting pipe, a two-stage four-roller crusher and a deslagging pipeline. The cutterhead is installed at the front end of the shield tunneling machine, the muddy water cabin is arranged behind the cutterhead, the front end of the spiral conveyor extends to the muddy water cabin, the rear end of the spiral conveyor is connected to the connecting pipe, the connecting pipe is connected with the two-stage four-roll crusher, and the two-stage four-roll crusher is connected to the slag discharging pipeline. According to the utility model, the spiral conveyer is used for conveying discharged slag, and compared with a traditional mud water pumping mode, the problems of slag stone accumulation and blockage at the bottom of the air cushion cabin can be effectively avoided; the two-stage four-roller crusher is high in crushing efficiency and high in crushing ratio, pebbles can be crushed into small particle sizes, blockage of a slurry discharging pipeline is avoided, the fault rate is reduced, and the technical problem that in the prior art, a slurry discharging system of a slurry balance shield cannot treat dense large-particle-size sandy pebbles is solved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine technology, specifically to a slurry shield tunneling crushing and muck removal system. Background Technology

[0002] Slurry-balanced shield tunneling utilizes direct or indirect methods to inject pressurized slurry into the slurry chamber, which permeates into the strata to form a mud film, maintaining the balance of the tunnel face. The slurry cut by the cutterhead is discharged through the slurry discharge pipe. However, the geological strata traversed by tunnel engineering and rail transit are becoming increasingly complex. When large pebbles appear in the strata, the slurry discharge pump struggles to remove the larger stones in time, leading to slurry chamber blockage and affecting normal tunneling operations. Current solutions to the slurry chamber blockage problem include installing a clamp-type crusher inside the slurry chamber or installing a secondary crusher outside the slurry chamber to crush larger stones into smaller ones for slurry discharge. However, installing the clamp-type crusher inside the slurry chamber creates a harsh working environment, making the equipment prone to damage and difficult to maintain. Secondary crushers in slurry shield tunneling include belt-driven jaw crushers, which have high crushing efficiency but experience significant vibration, are prone to blockage, and are difficult to clean. Single-roll crushers are also used, but they have a low crushing ratio, low efficiency, and are inconvenient to clean.

[0003] Although these measures have reduced the frequency of failures to some extent, a section of slurry discharge pipe still exists between the slurry tank and the gravel treatment unit due to the limitations of the equipment installation location. When a large amount of gravel is discharged at once, it may still cause blockage of the slurry discharge pipe at the front end of the circulation system, ultimately leading to system failure. Utility Model Content

[0004] The purpose of this utility model is to provide a slurry shield tunneling crushing and slag removal system to solve the technical problem that the slurry discharge system of the existing slurry balance shield tunneling machine cannot handle dense, large-diameter sand and gravel. The specific technical solution is as follows:

[0005] This utility model provides a slurry shield tunneling crushing and muck removal system. A cutterhead is installed at the front end of the shield body of the tunnel boring machine. The slurry shield tunneling crushing and muck removal system includes a slurry chamber, a spiral shaft, a spiral conveyor, a connecting pipe, a double-stage four-roll crusher, and a muck discharge pipe. The spiral conveyor is fixed inside the shield body of the tunnel boring machine, and the slurry chamber is located behind the cutterhead. The front end of the spiral conveyor extends into the slurry chamber, and the rear end of the spiral conveyor is connected to the connecting pipe. The connecting pipe is connected to the double-stage four-roll crusher, and the double-stage four-roll crusher is connected to the muck discharge pipe.

[0006] A further improvement of this utility model's slurry shield tunneling crushing and slag removal system is that the front end of the screw conveyor is equipped with an anti-surge gate.

[0007] A further improvement of this utility model's slurry shield tunneling crushing and slag removal system is that a gate is provided at the rear end of the screw conveyor.

[0008] A further improvement of this utility model's slurry shield tunneling crushing and slag removal system is that the connecting pipe is made of a flexible material.

[0009] A further improvement of this utility model's slurry shield tunneling crushing and slag removal system is that the double-stage four-roll crusher is connected to a dilution pipe.

[0010] A further improvement of this utility model's slurry shield tunneling crushing and slag removal system is that the dual-stage four-roll crusher includes a double-roll crushing section and a single-roll crushing section, with the single-roll crushing section connected to the bottom of the double-roll crushing section and the slag discharge pipe connected to the bottom of the single-roll crushing section.

[0011] The application of the technical solution of this utility model has the following beneficial effects:

[0012] This utility model relates to a slurry shield tunneling machine (SMT) muck removal system. It utilizes a screw conveyor for muck removal, effectively avoiding the accumulation and blockage of slag at the bottom of the air cushion chamber compared to traditional slurry pumping. The high-efficiency, high-ratio crushing double-stage four-roll crusher breaks pebbles into smaller particles, preventing slurry discharge pipe blockage and reducing the failure rate. This solves the technical problem of existing slurry balance shield tunneling machine systems being unable to handle dense, large-diameter sand and gravel. This utility model also addresses the issues of slurry chamber blockage and the low crushing ratio and efficiency of single-roll crushers. Its reasonable structural layout does not encroach on the muck removal space at the bottom of the tunnel boring machine (TBM), and it enables a single unit to perform multiple functions without requiring disassembly and reassembly within the tunnel. This improves the conveying and crushing capacity within the SMT machine, increases slurry circulation efficiency, and further enhances tunneling speed.

[0013] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0015] Figure 1 This is a schematic diagram of the slurry shield tunneling crushing and slag removal system of this utility model;

[0016] Figure 2 This is a vertical sectional view of the double-stage four-roll crusher of the slurry shield tunneling crushing and slag removal system of this utility model.

[0017] The components include: 1. cutter head; 2. mud and water chamber; 3. screw shaft; 4. anti-surge gate; 5. screw conveyor; 6. gate; 7. connecting pipe; 8. double-stage four-roll crusher; and 9. slag discharge pipe. Detailed Implementation

[0018] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] See Figures 1-2 As shown, a slurry shield tunneling machine crushing and muck removal system includes a cutterhead 1 installed at the front end of the shield body of the tunnel boring machine. The slurry shield tunneling machine crushing and muck removal system includes a slurry chamber 2, a spiral shaft 3, a spiral conveyor 5, a connecting pipe 7, a double-stage four-roll crusher 8, and a muck discharge pipe 9. The slurry chamber 2 is located behind the cutterhead 1. The spiral conveyor 5 is fixed inside the shield body of the tunnel boring machine, and the front end of the spiral conveyor 5 extends to the slurry chamber 2. The rear end of the spiral conveyor 5 is connected to the connecting pipe 7, the connecting pipe 7 is connected to the double-stage four-roll crusher 8, and the double-stage four-roll crusher 8 is connected to the muck discharge pipe 9.

[0020] Specifically, the screw conveyor 5 is internally equipped with a screw shaft 3, which passes through each section of the screw conveyor 5 and extends into the bottom of the slurry chamber 2. If it encounters materials that are difficult to pump out, such as stones, it can be discharged from the slurry chamber 2 through the screw blades and enter the double-stage four-roll crusher 8 for crushing before being pumped out as slurry. Furthermore, the screw conveyor 5 can be used in conjunction with a screening-type quarry to achieve the function of screening sand and gravel in strata rich in sand and gravel in the slurry chamber 2, thus achieving the function of slag removal from the slurry shield tunnel. The crushing device can be arranged on the rear trolley, optimizing the utilization of the front space of the tunnel boring machine and facilitating equipment maintenance.

[0021] Preferably, the screw conveyor 5 is equipped with an anti-surge gate 4 at its front end, and the anti-surge gate 4 is fixedly arranged on the partition of the mud and water tank 2, which can open and close the slag outlet in real time to meet the slag discharge and shutdown requirements of the tunnel boring machine.

[0022] Preferably, the rear end of the screw conveyor 5 is provided with a gate 6, thereby realizing the opening and closing of the slag outlet of the screw conveyor 5.

[0023] Preferably, the connecting pipe 7 is made of a flexible material. Specifically, the flexible connecting pipe 7 can be made of polyethylene pipe (PE / HDPE), polyvinyl chloride pipe (UPVC), flexible reinforced thermoplastic composite pipe (RTP pipe), etc. The flexible connecting pipe 7 has flexibility and impact resistance, and can adapt to the transportation of stones.

[0024] Preferably, the double-stage four-roll crusher 8 is connected to a dilution pipe. Water is added to the double-stage four-roll crusher 8 through the dilution pipe, which can improve the fluidity and clean the crusher. The stones conveyed by the screw conveyor 5 enter the double-stage four-roll crusher 8, are crushed, and then enter the mud and water pipeline system to be discharged outside the hole.

[0025] Preferably, the dual-stage four-roll crusher 8 includes a double-roll crushing section and a single-roll crushing section. The single-roll crushing section is connected to the bottom of the double-roll crushing section, and the slag discharge pipe 9 is connected to the bottom of the single-roll crushing section. Further, the double-roll crushing section is equipped with double-roll crushing rollers for crushing large-diameter boulders; the single-roll crushing section has two single-roll crushing rollers combined to further improve the crusher's crushing efficiency and production capacity. The dual-stage crushing structure significantly increases the overall crushing ratio, addressing the adaptability of slurry shield tunneling machines to special strata rich in sand and gravel containing a large number of large boulders, improving tunneling efficiency, achieving efficient slag discharge from high-density sand and gravel strata, and significantly improving construction efficiency.

[0026] In operation, the slag produced by the cutterhead 1 first enters the slurry chamber 2 and accumulates near the screw shaft 3 of the screw conveyor 5. Subsequently, the screw conveyor 5 transports the slag to the gate 6, through which it enters the double-stage four-roll crusher 8 for crushing. The crushed fine slag particles are then transported through the discharge pipe and ultimately flow into the slurry circulation system.

[0027] This utility model relates to a slurry shield tunneling machine's slag removal system. The slag conveyor 5 performs slag removal, effectively avoiding slag accumulation and blockage at the bottom of the air cushion chamber compared to traditional slurry pumping. The dual-stage four-roll crusher 8 boasts high crushing efficiency and a high crushing ratio, breaking pebbles to smaller particle sizes, preventing slurry discharge pipe blockage, reducing the failure rate, and solving the technical problem that existing slurry discharge systems in slurry balance shield tunnels cannot handle dense, large-particle-size sand and pebbles. This utility model also solves the problems of slurry chamber blockage and the low crushing ratio and efficiency of the single-roll crusher. Its reasonable structural layout does not encroach on the slag removal space at the bottom of the shield machine, and it enables one set of equipment to perform multiple functions without disassembling and reassembling equipment inside the tunnel. This improves the conveying and crushing capacity within the slurry shield machine's main unit, increases slurry circulation efficiency, and further enhances tunneling speed.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A slurry shield tunneling machine muck removal system, wherein a cutterhead (1) is installed at the front end of the shield body of the tunneling machine, characterized in that, The slurry shield tunneling crushing and slag removal system includes a slurry chamber (2), a spiral shaft (3), a spiral conveyor (5), a connecting pipe (7), a double-stage four-roll crusher (8), and a slag discharge pipe (9). The spiral conveyor (5) is fixed inside the shield of the tunneling machine, and the slurry chamber (2) is located behind the cutterhead (1). The front end of the spiral conveyor (5) extends to the slurry chamber (2), and the rear end of the spiral conveyor (5) is connected to the connecting pipe (7). The connecting pipe (7) is connected to the double-stage four-roll crusher (8), and the double-stage four-roll crusher (8) is connected to the slag discharge pipe (9).

2. The slurry shield tunneling crushing and muck removal system according to claim 1, characterized in that, The front end of the screw conveyor (5) is equipped with a surge guard (4).

3. The slurry shield tunneling crushing and muck removal system according to claim 1, characterized in that, The screw conveyor (5) is equipped with a gate (6) at its rear end.

4. The slurry shield tunneling crushing and muck removal system according to claim 1, characterized in that, The connecting pipe (7) is made of a flexible material.

5. The slurry shield tunneling crushing and muck removal system according to claim 1, characterized in that, The dual-stage four-roll crusher (8) is connected to a dilution pipe.

6. The slurry shield tunneling crushing and muck removal system according to claim 1, characterized in that, The dual-stage four-roll crusher (8) includes a double-roll crushing section and a single-roll crushing section. The single-roll crushing section is connected to the bottom of the double-roll crushing section, and the slag discharge pipe (9) is connected to the bottom of the single-roll crushing section.

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