Slurry shield machine slagging system

Abstract

The utility model relates to a shield machine technical field, concretely relates to a slurry shield machine slagging system, including screw conveyer, anti -inrush door, air cushion bin and crushing assembly, the first end of this screw conveyer is inserted into this air cushion bin, the second end of this screw conveyer is connected in this crushing assembly, this anti -inrush door includes door frame, drive assembly, upper gate, lower gate and compression -resistant material, this drive assembly, this upper gate and this lower gate sliding installation are in this door frame, this drive assembly is used for driving the sliding opening and closing of this upper gate and this lower gate in this door frame, when closing in this door frame, the upper gate and the lower gate between form the airtight chamber that can fill with the compression -resistant material. The utility model discloses through the structure of double -deck anti -inrush door plus intermediate compression -resistant material to bear the high pressure in the air cushion cabin, and further realizes the normal pressure overhauling of screw conveyer.

Description

Technical Field

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

[0002] In slurry shield tunneling, air-cushion direct-discharge circulation systems are commonly used. However, in water-rich sandy and gravelly strata, the system's operating efficiency is significantly reduced. The main reason is the presence of large-diameter sand and gravel in these strata. These particles easily accumulate densely and are too large, causing blockages at the discharge pipe's inlet, ultimately paralyzing the entire circulation system. Existing technologies primarily address this issue by adding quarry boxes and crushing devices to the circulation system to alleviate pipe and pump blockages caused by sand and gravel. While these measures reduce the frequency of failures to some extent, due to equipment installation limitations, a section of discharge pipe still exists between the slurry tank and the sand and gravel treatment device. When a large amount of sand and gravel is discharged, it can still cause blockages in the discharge pipe at the front of the circulation system, ultimately leading to system failure. Furthermore, during construction in water-rich strata, external water can easily enter the screw conveyor, preventing normal-pressure maintenance. Utility Model Content

[0003] The purpose of this utility model is to provide a slag removal system for slurry shield tunneling machines, so as to solve the technical problem that the screw conveyor of the air cushion direct discharge circulation system of slurry shield tunneling machines cannot be maintained under normal pressure. The specific technical solution is as follows: This utility model provides a slurry shield tunneling machine muck removal system. The slurry shield tunneling machine has a cutterhead installed at the front end of the shield body. The slurry shield tunneling machine muck removal system includes a screw conveyor, an anti-surge gate, an air cushion chamber, and a crushing assembly. The air cushion chamber is fixed inside the shield body of the slurry shield tunneling machine and is located behind the cutterhead. The first end of the screw conveyor extends into the air cushion chamber, and the second end of the screw conveyor is connected to the crushing assembly. The anti-surge gate includes a gantry, a drive assembly, an upper gate, a lower gate, and a pressure-resistant material. The upper gate and the lower gate are slidably installed on the gantry. The drive assembly is used to drive the upper gate and the lower gate to slide open and close on the gantry. When the upper gate and the lower gate are closed on the gantry, a sealed chamber is formed between the upper gate and the lower gate, which can be filled with the pressure-resistant material.

[0004] A further improvement of the slag removal system of this utility model is that the crushing component includes a slurry discharge pipe and two double-stage four-roll crushers. The second end of the screw conveyor is provided with two slag discharge ports. The two double-stage four-roll crushers are connected to the two slag discharge ports in a one-to-one correspondence. The slurry discharge pipe is connected to the two double-stage four-roll crushers.

[0005] A further improvement of the slurry shield tunneling machine muck removal system of this utility model is that the slurry discharge pipe is provided with two branch pipes, and the two branch pipes are connected one-to-one to the two double-stage four-roll crushers.

[0006] A further improvement of the slag discharge system of this utility model is that a gate is provided on the slag discharge port.

[0007] A further improvement of the slag removal system of this utility model is that the double-stage four-roll crusher includes a primary crushing section and a secondary crushing section. The primary crushing section includes two first crushing rollers, and the secondary crushing section includes two second crushing rollers.

[0008] A further improvement of the slurry shield tunneling machine muck removal system of this utility model is that the drive assembly includes a first drive component and a second drive component, the first drive component is connected to the upper gate plate, and the second drive component is connected to the lower gate plate.

[0009] A further improvement of the slag removal system of this utility model is that both the first driving component and the second driving component are hydraulic cylinders.

[0010] The application of the technical solution of this utility model has the following beneficial effects: This utility model relates to a slurry shield tunneling machine muck removal system. Through a structure with double-layer anti-surge doors and intermediate pressure-resistant material, it withstands the high pressure within the air cushion chamber, thereby enabling atmospheric pressure maintenance of the screw conveyor. This solves the technical problem of existing slurry shield tunneling machine air cushion direct discharge circulation systems being unable to perform atmospheric pressure maintenance on the screw conveyor. By installing a crushing component at the second end of the screw conveyor, this utility model can crush pebbles to a smaller particle size, preventing blockage of the slurry discharge pipe and reducing the failure rate. The dual muck discharge port design, combined with two sets of double-stage four-roll crushers, significantly improves crushing efficiency and crushing ratio, reduces the probability of pipe blockage, and thus improves construction efficiency. The dual muck discharge port structure ensures continuous operation on the other side even in the event of a failure or blockage on one side, achieving continuous crushing operations and guaranteeing continuous tunneling of the shield.

[0011] 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

[0012] 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: Figure 1 This is a schematic diagram of the slag removal system of the slurry shield tunneling machine of this utility model (A indicates the direction of slag transportation); Figure 2This is a schematic diagram of the connection of the double-stage four-roll crusher in the slag removal system of the slurry shield tunneling machine of this utility model; Figure 3 This is a front view of the anti-surge gate of the slag removal system for a slurry shield tunneling machine according to this utility model; Figure 4 This is a side view of the anti-surge gate of the slag removal system for a slurry shield tunneling machine according to this utility model.

[0013] Among them, 1. Screw conveyor; 2. Slag outlet; 3. Gate; 4. Double-stage four-roll crusher; 5. Gantry; 6. Screw shaft; 7. Air cushion silo; 8. Cutter disc; 9. Slurry discharge pipe; 10. First drive component; 11. Upper gate; 12. Lower gate; 13. Compression-resistant material; 14. Second drive component; 15. Large-diameter slag; 16. Small-diameter slag. Detailed Implementation

[0014] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] See Figures 1-4 As shown, a slurry shield tunneling machine muck removal system is provided. A cutterhead 8 is installed at the front end of the shield body of the slurry shield tunneling machine. The slurry shield tunneling machine muck removal system includes a screw conveyor 1, a surge guard, an air cushion chamber 7, and a crushing assembly. The air cushion chamber 7 is fixed inside the shield body of the slurry shield tunneling machine and is located behind the cutterhead 8. The first end of the screw conveyor 1 extends into the air cushion chamber 7, and the second end of the screw conveyor 1 is connected to the crushing assembly. The surge guard includes a gantry 5, a drive assembly, an upper gate 12, a lower gate, and a pressure-resistant material 13. The upper gate 12 and the lower gate are slidably mounted on the gantry 5. The drive assembly is used to drive the upper gate 12 and the lower gate to slide open and close on the gantry 5. When the upper gate 12 and the lower gate are closed on the gantry 5, a sealed chamber is formed between the upper gate 12 and the lower gate, which can be filled with the pressure-resistant material 13.

[0016] Specifically, the first end of the screw conveyor 1 extends into the bottom of the air cushion chamber 7, thereby conveying the sand and gravel accumulated at the bottom and preventing the accumulation and blockage of slag and gravel at the bottom of the air cushion chamber. The screw conveyor 1 is equipped with a movable screw shaft 6, and a telescopic mechanism connected to the rear end of the screw shaft 6 is also provided. In this embodiment, the pressure-resistant material 13 is a high-molecular polymer, such as polyurethane waterproofing material. During maintenance of the screw conveyor 1, its telescopic mechanism retracts the screw shaft 6 behind the anti-surge door, and the drive assembly drives the upper gate 12 and lower gate to close on the gantry 5. The outer periphery of the upper gate 12 and lower gate is sealed with rubber and packing to prevent slurry buildup. Simultaneously, a sealed chamber is formed between the upper gate 12 and lower gate. By injecting high-molecular polymer into the sealed chamber, the high pressure inside the air cushion chamber can be withstood, thus enabling normal-pressure maintenance of the screw conveyor 1 and ensuring the safety and operability of the maintenance environment.

[0017] Preferably, the crushing assembly includes a slurry discharge pipe 9 and two double-stage four-roll crushers 4. The second end of the screw conveyor 1 has two slag outlets 2, and the two double-stage four-roll crushers 4 are connected one-to-one to the two slag outlets 2. The slurry discharge pipe 9 is connected to the two double-stage four-roll crushers 4. Specifically, the double-stage four-roll crushers 4 can be conventional four-roll crusher equipment from the prior art. The configuration of the screw conveyor 1 with double gates 3 and double crushers enables simultaneous crushing on both sides, improving crushing efficiency. Simultaneously, while maintenance is performed on one side, uninterrupted operation can continue on the other side, further increasing the tunneling speed. The double-stage four-roll crusher 4 has high crushing efficiency and a high crushing ratio. The crushing assembly is arranged on the rear trolley, thereby optimizing the utilization of the front space of the tunnel boring machine and facilitating equipment maintenance.

[0018] Preferably, the discharge pipe 9 has two branch pipes, which are connected one-to-one to the two double-stage four-roll crushers 4. The two branch pipes can be merged into one main pipe, or the slurry can be discharged directly through the two branch pipes as needed.

[0019] Preferably, the slag outlet 2 is equipped with a gate 3. The slurry of the double-stage four-roll crusher 4 can be independently controlled through the gate 3 of each slag outlet 2 to meet the needs of rotating maintenance.

[0020] Preferred, such as Figure 2 As shown, the double-stage four-roll crusher 4 includes a primary crushing section and a secondary crushing section. The primary crushing section includes two first crushing rollers, and the secondary crushing section includes two second crushing rollers. The two first crushing rollers rotate relative to each other to crush large-diameter slag 15, obtaining medium-diameter slag. The two second crushing rollers rotate independently to crush the medium-diameter slag, obtaining small-diameter slag 16, which is then easily discharged through the discharge pipe 9.

[0021] Preferably, the drive assembly includes a first drive member 10 and a second drive member 14, the first drive member 10 being connected to the upper gate 12 and the second drive member 14 being connected to the lower gate. Both the first drive member 10 and the second drive member 14 are installed within the air cushion chamber 7 and correspond to the upper gate 12 and the lower gate.

[0022] Preferably, both the first driving component 10 and the second driving component 14 are hydraulic cylinders. Alternatively, the first driving component 10 and the second driving component 14 can be linear driving components such as pneumatic cylinders or electric telescopic rods, depending on actual needs. Specifically, the gantry 5 has an opening communicating with the interior of the screw conveyor 1. The gantry 5 has a certain thickness, and two insertion through holes are spaced apart along its thickness. The upper gate plate 12 and the lower gate plate pass through the two insertion through holes and block the opening, thereby blocking water and sand, and facilitating maintenance of the screw conveyor.

[0023] In operation, the slag produced by the cutterhead 8 first enters the air cushion chamber and accumulates near the screw shaft 6 of the screw conveyor. Subsequently, the screw conveyor 1 transports the slag to the discharge port 2. Large-diameter slag 15 passes through the gate 3 into the double-stage four-roll crusher 4 for crushing, resulting in small-diameter slag 16. The crushed fine slag particles are then transported through the discharge pipe 9 and ultimately flow into the mud circulation system. If either side of the double-stage four-roll crusher 4 experiences jamming or malfunction, maintenance or slag removal can be performed by closing the corresponding gate 3, while the other side continues normal operation, thus ensuring the continuity of the tunneling process.

[0024] This utility model relates to a slurry shield tunneling machine muck removal system. Through a structure with double-layer anti-surge doors and an intermediate pressure-resistant material 13, it withstands the high pressure within the air cushion chamber, thereby enabling atmospheric pressure maintenance of the screw conveyor 1. This solves the technical problem in existing slurry shield tunneling machine air cushion direct discharge circulation systems where the screw conveyor 1 cannot undergo atmospheric pressure maintenance. By installing a crushing component at the second end of the screw conveyor 1, this utility model can crush pebbles to a smaller particle size, preventing blockage of the slurry discharge pipe 9 and reducing the failure rate. The use of a double muck outlet 2 design, combined with two sets of double-stage four-roll crushers 4, significantly improves crushing efficiency and crushing ratio, reduces the probability of pipe blockage, and thus improves construction efficiency. The double muck outlet 2 structure ensures continuous operation on the other side even in the event of a failure or blockage on one side, achieving continuous crushing operations and guaranteeing continuous tunneling of the shield.

[0025] 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 slag removal system for a slurry shield tunneling machine, wherein a cutterhead (8) is installed at the front end of the shield body of the slurry shield tunneling machine, characterized in that, The slurry shield tunneling machine muck removal system includes a screw conveyor (1), a surge gate, an air cushion chamber (7), a crushing assembly, and a cutterhead (8); the air cushion chamber (7) is fixed inside the shield body of the slurry shield tunneling machine and is located behind the cutterhead (8); the first end of the screw conveyor (1) extends into the air cushion chamber (7), and the second end of the screw conveyor (1) is connected to the crushing assembly; the surge gate includes a gantry (5), a drive assembly, an upper gate (12), a lower gate, and a pressure-resistant material (13); the upper gate (12) and the lower gate are slidably installed on the... On the gantry (5), the drive assembly is used to drive the upper gate (12) and the lower gate to slide open and close on the gantry (5). When the upper gate (12) and the lower gate are closed on the gantry (5), a sealed chamber is formed between the upper gate (12) and the lower gate, which can be filled with the pressure-resistant material (13). The outer periphery of the upper gate (12) and the lower gate is sealed with rubber and packing for slurry blocking. The screw conveyor (1) is provided with a movable screw shaft (6). The screw conveyor (1) is provided with a telescopic mechanism connected to the rear end of the screw shaft (6).

2. The slurry shield tunneling machine muck removal system according to claim 1, characterized in that, The crushing assembly includes a slurry discharge pipe (9) and two double-stage four-roll crushers (4). The second end of the screw conveyor (1) is provided with two slag outlets (2). The two double-stage four-roll crushers (4) are connected to the two slag outlets (2) in a one-to-one correspondence. The slurry discharge pipe (9) is connected to the two double-stage four-roll crushers (4).

3. The slurry shield tunneling machine muck removal system according to claim 2, characterized in that, The discharge pipe (9) is provided with two branch pipes, which are connected one-to-one to the two double-stage four-roll crushers (4).

4. The slurry shield tunneling machine muck removal system according to claim 2, characterized in that, The slag outlet (2) is equipped with a gate (3).

5. The slurry shield tunneling machine muck removal system according to claim 2, characterized in that, The dual-stage four-roll crusher (4) includes a primary crushing section and a secondary crushing section. The primary crushing section includes two first crushing rolls, and the secondary crushing section includes two second crushing rolls.

6. The slurry shield tunneling machine muck removal system according to claim 1, characterized in that, The drive assembly includes a first drive member (10) and a second drive member (14), the first drive member (10) being connected to the upper gate (12) and the second drive member (14) being connected to the lower gate.

7. The slurry shield tunneling machine muck removal system according to claim 6, characterized in that, Both the first driving component (10) and the second driving component (14) are hydraulic cylinders.

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