A multi-blade staggered wear-resistant device of a high-performance shield machine cutter

Abstract

The utility model belongs to the field of shield machine, concretely relates to a kind of multi-blade staggered wear-resistant device of high-efficiency shield machine cutter, solve the current shield cutter in shield tunneling process, do not have the characteristics of multi-blade staggered, when facing uneven special geology, easy to appear cutter wear seriously, then cannot reach the effect of wear resistance, increase the problem of cutter cost when shield tunneling, including cutterhead, the front of the cutterhead is provided with a plurality of installation grooves, the inside of each installation groove is provided with mounting block, the side surface of each mounting block is provided with two first hob, the side surface of each mounting block away from each other is provided with second hob, the front of each mounting block is provided with third hob. By two first hobs, third hobs and the second hobs of side surface, can be staggered distribution, can disperse the cutting pressure that single hob bears, will make wear more uniform, improve the wear resistance of device.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine technology, specifically to a high-efficiency multi-blade interlaced wear-resistant device for tunnel boring machine cutters. Background Technology

[0002] A tunnel boring machine (TBM) is a large-scale mechanized construction equipment used in underground tunnel engineering. It is widely used in the construction of underground projects such as subways, railways, highways, and municipal pipelines. Its core function is to safely and efficiently excavate tunnels underground, while simultaneously completing a series of operations such as segment assembly and lining support, greatly reducing the risks and costs of traditional manual excavation.

[0003] The cutterhead, located at the front of the tunnel boring machine (TBM), is the core component for excavating strata. However, current TBM cutters do not have the characteristic of multiple interlaced blades during tunneling. When facing special geological conditions with uneven hardness, the cutters are prone to severe wear, which leads to a failure to achieve wear resistance and increases the cost of cutters during TBM tunneling. To address this issue, we propose a high-efficiency multi-blade interlaced wear-resistant device for TBM cutters. Utility Model Content

[0004] The technical problem solved by this utility model is that current shield tunneling cutters do not have the characteristic of multiple interlaced blades during shield tunneling. When facing special geological conditions with uneven hardness, the cutters are prone to severe wear, which leads to a failure to achieve wear resistance and increases the cost of cutters during shield tunneling. This utility model provides a high-efficiency shield machine cutter with multiple interlaced blades for wear resistance.

[0005] To solve the above-mentioned technical problems, this utility model provides a high-efficiency shield tunneling machine cutterhead multi-blade staggered wear-resistant device, including a cutterhead. The front of the cutterhead has multiple mounting slots, and each mounting slot is provided with a mounting block. Each mounting block has two first cutters on one side, a second cutter on the side of each mounting block that is far apart from each other, and a third cutter on the front of each mounting block.

[0006] Preferably, one side of the cutter head has multiple through holes, and one side of each mounting block is fixedly connected with a fixing screw. One end of each fixing screw passes through the through hole and extends to the outside of the through hole. The outer surfaces of the multiple fixing screws are threaded with locking nuts, and the locking nuts are located on one side of the cutter head.

[0007] Preferably, each of the mounting blocks has two openings on one side, and each of the mounting grooves has two threaded fixing grooves on its inner bottom wall.

[0008] Preferably, each of the openings is provided with a locking screw on one side, and the outer surface of the locking screw is threadedly connected to the inner wall of the threaded fixing groove.

[0009] Preferably, the first hob, the second hob, and the third hob are all made of high-strength alloy steel.

[0010] Compared with related technologies, this utility model has the following beneficial effects:

[0011] This invention uses the mounting groove of the cutter head to fix the mounting block. In addition, the fixing screw passes through the through hole of the cutter head and can be tightened by the locking nut. Furthermore, the locking screw is screwed into the threaded fixing groove on the inner wall of the mounting groove to form a double fixing structure. This ensures that the mounting block does not shift during rotating excavation, avoids the displacement of the cutter head position due to loose installation, and reduces additional wear caused by shaking. The two first cutters, the third cutter, and the second cutter on the side can be staggered to distribute the cutting pressure borne by each cutter head, resulting in more uniform wear and improving the wear resistance of the device.

[0012] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a frontal three-dimensional structural diagram of the present utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the rear of this utility model;

[0016] Figure 3 This is a top sectional view of the cutter head of this utility model;

[0017] Figure 4 This is an exploded view of the mounting block and cutter head of this utility model.

[0018] Numbering on the map:

[0019] 1. Cutter head; 2. Mounting slot; 3. Mounting block; 4. First cutter; 5. Third cutter; 6. Second cutter; 7. Through port; 8. Locking screw; 9. Through hole; 10. Fixing screw; 11. Locking nut; 12. Threaded fixing groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 A high-efficiency shield tunneling machine cutterhead multi-blade staggered wear-resistant device includes a cutterhead 1. The cutterhead 1 has multiple mounting slots 2 on its front side. Each mounting slot 2 contains a mounting block 3. Two first cutters 4 are mounted on one side of each mounting block 3, and a second cutter 6 is mounted on the side of each mounting block 3 that is far apart from each other. A third cutter 5 is mounted on the front side of each mounting block 3. The first cutters 4, second cutters 6, and third cutters 5 are all made of high-strength alloy steel, possessing excellent hardness and wear resistance. The two first cutters 4 can perform primary cutting on intermediate rock layers. The second cutters 6 on the side can be used for scraping operations on side rock layers. The third cutter 5 on the front is responsible for secondary finishing of the broken surface layer, improving adaptability to strata of different hardness and cutting efficiency.

[0022] Preferably, one side of the cutter head 1 has multiple through holes 9, and one side of each mounting block 3 is fixedly connected with a fixing screw 10. One end of each fixing screw 10 passes through the through hole 9 and extends to the outside of the through hole 9. The outer surfaces of the multiple fixing screws 10 are threaded with locking nuts 11, and the locking nuts 11 are located on one side of the cutter head 1. By passing through the through hole 9 of the cutter head 1 with the fixing screw 10, and by using the locking nuts 11, the mounting block 3 can be firmly axially fixed from one side of the cutter head 1, preventing the mounting block 3 from axial displacement when the cutter head 1 rotates and digs at high speed, and ensuring that the hob always maintains the preset working position during the cutting process.

[0023] Preferably, each mounting block 3 has two openings 7 on one side, and each mounting groove 2 has two threaded fixing grooves 12 on its inner bottom wall. Each opening 7 has a locking screw 8 on one side, and the outer surface of the locking screw 8 is threadedly connected to the inner wall of the threaded fixing groove 12. Through the auxiliary fixing structure of the openings 7, the threaded fixing grooves 12 and the locking screws 8, the connection stability between the mounting block 3 and the mounting groove 2 is enhanced. It can cooperate with the fixing action of the fixing screw 10 and the locking nut 11 to form a double limit, so as to prevent the mounting block 3 from shaking or loosening during the cutting operation.

[0024] The specific implementation process of this utility model is as follows: In use, the front of the cutter head 1 is fixed with the mounting block 3 through the mounting groove 2. The fixing screw 10 on one side of the mounting block 3 passes through the through hole 9 of the cutter head 1 and is tightened by the locking nut 11. The locking screw 8 passes through the through hole 7 and is screwed into the threaded fixing groove 12 on the inner wall of the mounting groove 2, which can ensure that the mounting block 3 does not shift during rotating excavation. Then, the two first roller cutters 4 and the third roller cutter 5 on the front of the mounting block 3, as well as the second roller cutter 6 on the side, can be staggered. When facing uneven strata, the first roller cutter 4 can perform the main cutting on the medium-hard rock mass, the second roller cutter 6 is suitable for scraping the harder rock layers on the side, and the third roller cutter 5 is responsible for the secondary trimming after the surface is broken, which will form a three-dimensional staggered cutting system.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency shield tunneling machine cutterhead multi-blade staggered wear-resistant device, comprising a cutterhead (1), characterized in that: The cutter head (1) has multiple mounting slots (2) on its front side. Each mounting slot (2) has a mounting block (3) inside. Each mounting block (3) has two first roller cutters (4) on one side. Each mounting block (3) has a second roller cutter (6) on one side away from each other. Each mounting block (3) has a third roller cutter (5) on its front side.

2. The high-efficiency shield machine cutterhead multi-blade staggered wear-resistant device according to claim 1, characterized in that: The cutter head (1) has multiple through holes (9) on one side, and each mounting block (3) has a fixing screw (10) fixedly connected to one side. One end of each fixing screw (10) passes through the through hole (9) and extends to the outside of the through hole (9).

3. The high-efficiency shield machine cutterhead multi-blade staggered wear-resistant device according to claim 2, characterized in that: The outer surfaces of the plurality of fixing screws (10) are threaded with locking nuts (11), and the locking nuts (11) are located on one side of the cutter head (1).

4. The high-efficiency shield machine cutterhead multi-blade staggered wear-resistant device according to claim 1, characterized in that: Each of the mounting blocks (3) has two openings (7) on one side, and each of the mounting grooves (2) has two threaded fixing grooves (12) on the inner bottom wall.

5. The high-efficiency shield machine cutterhead multi-blade staggered wear-resistant device according to claim 4, characterized in that: Each of the openings (7) is provided with a locking screw (8) on one side, and the outer surface of the locking screw (8) is threadedly connected to the inner wall of the threaded fixing groove (12).

6. The high-efficiency shield machine cutterhead multi-blade staggered wear-resistant device according to claim 1, characterized in that: The first hob (4), the second hob (6) and the third hob (5) are all made of high-strength alloy steel.

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