Slurry shield tunneling machine with double slurry doors
By designing a double mud door and crusher in the mud-water shield machine, the problems of easy clogging of the slurry outlet and accumulation of slag stones are solved, efficient discharge of slag stones and protection of the cutter plates are achieved, and construction efficiency and safety are improved.
Patent Information
- Application Number
- CN202421113256.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The slurry outlets in the existing mud and water shield machine are prone to blockage, and the slag and stones in the mud and water silo are prone to accumulate, resulting in wear and difficulty in cleaning the cutter plate.
Designed with a double mud door structure, located on the left and right sides of the lower part of the front partition, equipped with mud gates and removable grilles. The crusher is located in the air cushion chamber, corresponding to the slurry drainage system. The slurry inlet and slurry drainage pipelines operate separately, and the slurry output is The mouth is located at the upper part of the mud and water silo to ensure smooth discharge of slag and prevent blockage.
It effectively reduces slag accumulation and cutting board wear, improves slurry efficiency, avoids the risk of blockage, meets the forward and reverse requirements of the cutting board, and improves the slurry efficiency through crushers and recycling systems.
Smart Images
Figure CN222207901U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of slurry shield machines, in particular to a slurry shield machine with double slurry doors. Background Art
[0002] The front shield of the air cushion slurry shield is divided into a slurry bin and an air cushion bin. The slag is produced in the slurry bin, and the inlet of the slurry discharge pipe is located at the bottom of the air cushion bin. In order to achieve slag discharge, a slurry door must be set on the partition between the slurry bin and the air cushion bin, so that the slurry and slag move from the slurry bin to the air cushion bin. At present, the mud door is arranged at the bottom of the partition. Through investigation and simulation research, it is found that when the cutter disc rotates, it will drive the slag to one side of the shield body. The slag is distributed in a crescent shape, which makes it impossible for the slag to enter the air cushion bin through the bottom mud door in time. Only when the slag is accumulated in the slurry bin can it enter the air cushion bin from the bottom mud door. The cutter disc stirs a large amount of slag in the slurry bin, which causes the wear and cracking of the cutter disc and is also easy to block the mud door.
[0003] In response to the above problems, the mud-water direct-discharge shield and the air-cushion direct-discharge shield are derived. The mud-water direct-discharge shield cancels the air-cushion bin, and the slurry discharge pipe is directly connected to the mud-water bin. The problem is that the lack of the air-cushion bin makes it impossible to accurately balance the pressure of the mud-water bin, which is easy to cause landslides in unstable strata. In addition, the direct connection between the slurry discharge port and the mud-water bin is easy to cause blockage, and the later treatment is difficult. The air-cushion direct-discharge shield published by the Chinese patent with publication number CN112727481B adds an air-cushion bin for accurately controlling the pressure of the mud-water bin, and the slurry discharge pipe is directly connected to the mud-water bin. However, there are still problems that the slurry discharge port is easy to be blocked and difficult to clean, and the slurry discharge port is still located at the bottom, and the slag cannot be discharged in time. The Chinese patent with publication number CN105332711B combines the above two methods. While having an air-cushion bin, two slurry discharge pipes are designed, one connected to the mud-water bin and the other connected to the air-cushion bin. The two pipes operate separately, and there are also problems of easy blockage and a lot of slag accumulation in the mud-water bin. Utility Model Content
[0004] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a slurry shield machine with double slurry doors, which solves the problems in the prior art that the slurry discharge port of the slurry shield machine is easily blocked and the slag and stone in the slurry bin are easily accumulated.
[0005] The technical solution of the utility model is achieved as follows: a mud shield machine with double mud doors, including a cutter disc and a shield shell, a front baffle and a rear baffle are arranged in the shield shell, the front baffle, the cutter disc and the shield shell form a mud and water bin, the front baffle, the rear baffle and the shield shell form an air cushion bin, two mud doors are arranged at the lower part of the front baffle, a mud gate is arranged on the mud door, a crusher is arranged in the air cushion bin, the crusher is located between the two mud doors and corresponds to the slurry discharge system.
[0006] Further preferably, the two mud doors are symmetrically arranged on the left and right sides of the lower part of the front partition, and are adapted to the forward and reverse rotation of the cutter disc, so that smooth slag discharge can be ensured in both cases. A detachable grille is provided on the mud door.
[0007] As an implementation mode, the mud door is tiltedly arranged on the front partition; at this time, the gate also performs corresponding tilted opening and closing.
[0008] Further preferably, the center line of the mud door passes through the center of the front partition, and the angle β between the center line of the mud door and the vertical center line of the front partition is 30°~60°.
[0009] As an implementation mode, the mud door is vertically arranged on the front partition, and the center line of the mud door is parallel to the vertical center line of the front partition; at this time, the gate also performs corresponding vertical switching.
[0010] Further preferably, the slurry discharge system includes a slurry discharge pipe and a slurry inlet pipe, the slurry inlet of the slurry discharge pipe extends into the air cushion bin and corresponds to the crusher, the slurry inlet pipe is connected to the slurry discharge pipe through a bypass pipe, and the slurry outlet of the slurry inlet pipe extends into the mud and water bin.
[0011] Further preferably, the slurry inlet pipe, bypass pipe and slurry discharge pipe are all provided with valves. Preferably, the slurry outlet of the slurry inlet pipe is located at the upper part of the mud and water bin.
[0012] Further preferably, the back of the cutter disc is provided with a plurality of stirring rods extending to the mud and water bin. Preferably, the cutter disc is connected to a main drive arranged on a front baffle and a rear baffle, and the front baffle and the rear baffle are both sealedly connected to the main drive.
[0013] The beneficial effects of the utility model are as follows: the utility model adopts the design of opening mud doors on the left and right sides of the lower part of the front partition, which solves the problem of excessive accumulation of slag in the mud and water bin, easy damage to the crusher, and difficulty in clearing the slag in the mud and water bin. The utility model fully considers the movement and accumulation state of slag in the mud and water bin, and adopts the side mud door slag discharge method. Compared with the bottom slag discharge, it can reduce the amount of slag in the mud and water bin and reduce the risk of wear and blockage of the cutter disc. Adding a detachable grille to the mud door prevents oversized slag from entering the air cushion bin and causing damage to the crusher. At the same time, two mud doors are opened to meet the needs of the forward and reverse rotation of the cutter disc. If one side of the mud door is blocked, the other side of the mud door can be quickly opened, so that the mud and water bin is connected to the air cushion bin, and there is no need to set up a connecting pipeline separately. At the same time, it is more convenient to enter the mud and water bin to clear the slag. In addition, the utility model sets a crusher at the slurry inlet of the slurry discharge pipeline to crush large-size slag and prevent the slurry inlet from being blocked; the slurry is recycled inside the slurry discharge system to further improve the slurry discharge efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0016] Figure 2 for Figure 1 Center AA view.
[0017] Figure 3 This is a schematic diagram of the situation when the cutter disc rotates clockwise.
[0018] Figure 4 This is a schematic diagram of the situation where the cutter disc rotates counterclockwise.
[0019] Figure 5 This is a schematic diagram of the mud door arrangement in Example 3.
[0020] Figure 6 The utility model is a schematic diagram of the state of setting a grille on the mud door. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] like Figure 1As shown, in embodiment 1, a slurry shield machine with double mud doors comprises a cutterhead 1 and a shield shell 5, wherein the shield shell 5 is a pressure-bearing and supporting structure of the main machine part of the tunnel boring machine. In this embodiment, the shield shell 5 is provided with a front baffle 3 and a rear baffle 14, which are arranged in parallel and one after the other in the shield shell 5. The front baffle 3, the cutterhead 1 and the shield shell 5 form a mud and water bin 2, and the front baffle 3, the rear baffle 14 and the shield shell 5 form an air cushion bin 4. Two mud doors 12 are provided at the lower part of the front baffle 3, and a mud gate 11 is provided on the mud door 12, which is used to control the opening and closing of the mud door. A crusher 10 is provided in the air cushion bin 4, and the crusher 10 is located between the two mud doors 12 and corresponds to the slurry discharge system; the mud and slag in the mud and water bin 2 enter the crusher 10 through the mud door 12, and the large-size slag and stone are crushed. After being crushed by the crusher, the slag and stone are discharged through the slurry discharge system to achieve efficient slurry discharge. As a preferred solution, the mud door is provided with a detachable grille 15; the grille 15 is installed in front of the mud door and fixed to the front partition by bolts. Figure 6 Install a removable grid to prevent oversized slag from entering the air cushion bin, reduce crusher pressure, and prevent clogging of the discharge port.
[0023] This embodiment is a preferred solution. Figure 2 , 3 As shown in Figure 4, the two mud doors 12 are symmetrically arranged on the left and right sides of the lower part of the front partition 3 (corresponding to the right mud door 12A and the left mud door 12B), and two mud gates 11 are correspondingly arranged (corresponding to the right mud gate 11A and the left mud gate 11B) to meet the excavation requirements of the cutter head in both positive and negative directions. As a result, when the cutter head rotates clockwise, the slag is stirred by the cutter head and presents a crescent shape concentrated in the lower left part of the mud and water bin. The lower left mud door is opened to allow the slag to quickly enter the air cushion bin from the mud and water bin, and the lower right mud door gate is closed at the same time. When the cutter head rotates counterclockwise, the slag is stirred by the cutter head and presents a crescent shape concentrated in the lower right part of the mud and water bin. The lower right mud door is opened, and the slag also quickly enters the air cushion bin from the mud and water bin, and the lower left mud door gate is closed at the same time.
[0024] Embodiment 2, as Figure 4 As shown, a slurry shield machine with double mud gates, based on Example 1, the mud gate 12 is tilted and set on the front partition 3. This solution includes two situations. First, the mud gate 12 is tilted and the center line of the mud gate 12 does not pass through the center of the front partition 3. At this time, the mud gate 12 can ensure the smooth passage of mud and slag. Second, the center line of the mud gate 12 passes through the center of the front partition 3, and the angle β between the center line of the mud gate 12 and the vertical center line of the front partition 3 is 30°~60°, and β=45° is preferred. At this time, the mud gate 12 is located in the middle of the crescent-shaped slag accumulation area, realizing efficient circulation of mud and slag.
[0025] Embodiment 3, as Figure 5 As shown, a slurry shield machine with double mud gates is shown. The difference between this embodiment and embodiment 2 is that the mud gate 12 in this embodiment is vertically arranged on the front partition 3, and the center line of the mud gate 12 is parallel to the vertical center line of the front partition 3. That is, in this embodiment, the direction of the mud gate and the mud gate gate is changed to vertically downward, and at the same time, the mud gate 12 is ensured to be located in the middle of the crescent-shaped slag accumulation area, which can also achieve efficient circulation of mud, slag and stone.
[0026] Embodiment 4, a slurry shield machine with double slurry gates, based on embodiment 2 or 3, the slurry discharge system in this embodiment includes a slurry discharge pipe 9 and a slurry inlet pipe 7, the slurry inlet of the slurry discharge pipe 9 extends into the air cushion bin 4 and corresponds to the crusher 10; the mud and slag in the slurry bin enter the air cushion bin through the slurry gate, and then are further crushed under the action of the crusher 10 to prevent the slurry inlet from being blocked. The slurry inlet pipe 7 is connected to the slurry discharge pipe 9 through the bypass pipe 8, and the slurry outlet of the slurry inlet pipe 7 extends into the slurry bin 2, and the slurry outlet of the slurry inlet pipe 7 is located at the upper part of the slurry bin 2. Valves are provided on the slurry inlet pipe 7, the bypass pipe 8 and the slurry discharge pipe 9 to control whether they are flowing or not.
[0027] In actual construction, the mud crushed by the crusher is discharged through the slurry discharge pipe 9, or part of the slurry entering the slurry discharge pipe 9 enters the slurry inlet pipe 7 through the bypass pipe 8, and then re-enters the mud and water bin 2 through the slurry inlet pipe 7 to improve the slag in the mud and water bin, realize the recycling of the slurry, and further improve the slurry discharge efficiency.
[0028] In this embodiment, it is preferred that a plurality of stirring rods 13 extending to the mud and water bin 2 are provided on the back of the cutter disc 1; as the cutter disc rotates, the stirring rods can stir the mud and slag in the mud and water bin to prevent large-sized slag from clogging the mud door. The cutter disc 1 is connected to the main drive 6 provided on the front partition 3 and the rear partition 14, and the front partition 3 and the rear partition 14 are both sealed and connected to the main drive 6; the sealing of the mud and water bin and the air cushion bin is ensured. If there are slag of super-large particle sizes concentrated at the removable grille, the stirring rods on the back of the cutter disc can peel off the slag to prevent clogging, and the large-sized slag in the mud and water bin will be broken after the collision between the stirring rods and the cutter disc. If the removable grille is blocked, the grille can be removed for cleaning. If there are too many slags at the mud door after the grille is removed and it cannot enter the mud and water bin, it can be entered from the mud door on the other side for cleaning.
[0029] Specific implementation method: Taking the clockwise rotation of the cutter disc as an example, first close the right mud gate gate, open the left mud gate gate, keep the air cushion bin connected with the mud and water bin, and drive the cutter disc to rotate. Cut the slag stone on the face and let it fall. The slag stone is stirred by the cutter disc and moves to the left side of the mud and water bin. The slag stone is concentrated in the lower left part of the mud and water bin and quickly enters the air cushion bin through the left mud gate. After being crushed by the crusher, it enters the slurry discharge pipe. When the cutter disc rotates counterclockwise, the slag stone is concentrated in the lower right part of the mud and water bin. At this time, close the left mud gate gate and open the right mud gate. The slag stone is driven by the cutter disc to concentrate on the right side of the mud and water bin and enter the air cushion bin through the right mud gate. At the same time, a stirring rod is set on the back of the cutter disc to prevent large-size slag stone from blocking the mud gate. If the mud door is blocked during the slag discharge process, the machine can be stopped and the grille can be removed for cleaning. If the grille cannot be removed, open the mud door on the other side to connect the mud and water bin with the air cushion bin, and enter the mud and water bin through the mud door on the unblocked side to clean the slag. If the slurry discharge pipe is blocked or the crusher fails, the mud doors on both sides can be closed at the same time, and the air cushion bin can be entered for slag cleaning or maintenance to ensure efficient and safe construction.
[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A slurry shield machine with double slurry doors, comprising a cutterhead (1) and a shield shell (5), characterized in that: A front baffle (3) and a rear baffle (14) are provided in the shield shell (5); the front baffle (3), the cutter head (1) and the shield shell (5) form a mud and water bin (2); the front baffle (3), the rear baffle (14) and the shield shell (5) form an air cushion bin (4); two mud doors (12) are provided at the lower part of the front baffle (3); a mud gate (11) is provided on the mud door (12); a crusher (10) is provided in the air cushion bin (4); the crusher (10) is located between the two mud doors (12) and corresponds to the mud discharge system.
2. The slurry shield machine with double slurry doors according to claim 1, characterized in that: The two mud doors (12) are symmetrically arranged on the left and right sides of the lower part of the front partition (3); and a detachable grille (15) is provided on the mud door (12).
3. The slurry shield machine with double slurry doors according to claim 2, characterized in that: The mud door (12) is arranged obliquely on the front partition plate (3).
4. The slurry shield machine with double slurry doors according to claim 3, characterized in that: The center line of the mud door (12) passes through the center of the front baffle (3), and the angle β between the center line of the mud door (12) and the vertical center line of the front baffle (3) is 30° to 60°.
5. The slurry shield machine with double slurry doors according to claim 2, characterized in that: The mud door (12) is vertically arranged on the front partition (3), and the center line of the mud door (12) is parallel to the vertical center line of the front partition (3).
6. The slurry shield machine with double slurry doors according to any one of claims 1 to 5, characterized in that: The slurry discharge system comprises a slurry discharge pipe (9) and a slurry inlet pipe (7); the slurry inlet of the slurry discharge pipe (9) extends into the air cushion bin (4) and corresponds to the crusher (10); the slurry inlet pipe (7) is connected to the slurry discharge pipe (9) via a bypass pipe (8); and the slurry outlet of the slurry inlet pipe (7) extends into the mud and water bin (2).
7. The slurry shield machine with double slurry doors according to claim 6, characterized in that: Valves are provided on the slurry inlet pipe (7), the bypass pipe (8) and the slurry discharge pipe (9).
8. The slurry shield machine with double slurry doors according to claim 7, characterized in that: The slurry outlet of the slurry inlet pipe (7) is located at the upper part of the mud and water bin (2).
9. The slurry shield machine with double slurry doors according to claim 1 or 8, characterized in that: A plurality of stirring rods (13) extending into the mud and water bin (2) are provided on the back of the cutter disc (1).
10. The slurry shield machine with double slurry doors according to claim 9, characterized in that: The cutter disc (1) is connected to a main drive (6) arranged on a front baffle (3) and a rear baffle (14), and the front baffle (3) and the rear baffle (14) are both sealedly connected to the main drive (6).