High-strength tunnel boring machine tooth

Abstract

The utility model relates to a high-strength tunnel boring machine tooth which comprises a blocky tooth head body, a working part is arranged on one side of the top of the tooth head body, at least one assembling groove is formed in the working part, and a hard alloy block matched with an assembling hole in shape is welded in the assembling groove in an embedded mode and used as a working head. An assembling part is arranged behind the working part, at least one assembling hole vertically penetrating through the tooth head body is formed in the assembling part, and a bolt is inserted into the assembling hole and used for installing the tooth head body on the tunnel boring machine. The utility model has the advantages of reasonable structure, stable assembly, good firmness, convenient installation and disassembly, high hardness and high wear resistance, greatly improved working efficiency, prolonged service life and the like.

Description

Technical Field

[0001] This utility model belongs to the technical field of tunnel boring machine parts, and relates to a high-strength tunnel boring machine tooth. Background Technology

[0002] A tunnel boring machine (TBM) is a piece of equipment used for underground tunnel construction. It excavates a tunnel underground by using rotating cutters or teeth to excavate, break the surrounding rock, and form the tunnel cross-section. Existing TBMs typically use carbide tips for their teeth. This design becomes less wear-resistant when excavating hard rock for extended periods, potentially leading to deformation or even breakage. This increases subsequent operating costs, reduces work efficiency, and causes intense vibrations between the teeth and the TBM during excavation, making the connection prone to loosening.

[0003] To address this issue, a high-strength tunnel boring machine tooth was designed to overcome the aforementioned problems. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a high-strength tunnel boring machine tooth with reasonable structure, stable assembly, good firmness, convenient installation and disassembly, high hardness and high wear resistance, which greatly improves working efficiency and service life.

[0005] This utility model is achieved through the following technical solution: a high-strength tunnel boring machine tooth, comprising a block-shaped tooth head body, the top side of the tooth head body being a working part, at least one assembly groove being provided on the working part, and a hard alloy block matching the shape of the assembly groove being embedded and welded into the assembly groove for use as a working head, the rear of the working part being an assembly part, and at least one vertically penetrating assembly hole being provided on the assembly part, into which a bolt is inserted for mounting the tooth head body on a tunnel boring machine.

[0006] Preferably, the working head has an inwardly inclined first slope surface directly below the side of the tooth body, and a downwardly inclined second slope surface behind the working head on the upper surface of the tooth body. The first slope surface and the second slope surface form a triangular working part, which is used to improve the soil breaking efficiency of the working head in the working part assembly groove.

[0007] Preferably, the number of assembly slots is three, all of the same size and evenly arranged. Each assembly slot has a matching cemented carbide block welded in it, and a PCD diamond is welded to the side of the cemented carbide block away from the assembly part to improve work efficiency.

[0008] Preferably, the PCD diamond is welded with multiple uniformly distributed cemented carbide particles to improve the wear resistance of the working head.

[0009] Preferably, there are two assembly holes arranged in a front-to-back pattern. Each assembly hole consists of a cylindrical positioning hole arranged vertically and a cylindrical countersunk hole. The positioning hole and the countersunk hole are concentric, and the diameter of the positioning hole is larger than the diameter of the countersunk hole, while the height is smaller than the height of the countersunk hole.

[0010] Preferably, the rear of the assembly hole is inclined inward at both ends of the assembly part, forming a figure-eight shaped tail. The figure-eight shaped tail is used to improve the overall appearance, wear resistance and facilitate the assembly of the tooth body.

[0011] The beneficial effects of this utility model are as follows:

[0012] This invention relates to a high-strength tunnel boring machine tooth design. The working head uses ultra-high strength and ultra-wear-resistant PCD tooth tips instead of traditional carbide tooth tips, significantly improving product lifespan and work efficiency while reducing tooth installation and disassembly. Furthermore, two positioning holes on the tooth head body are used for bolt fixation, facilitating installation and disassembly. The overall design of this invention is reasonable, allowing for convenient installation and disassembly. Its ultra-high strength and ultra-high wear resistance result in a long service life and greatly improve work efficiency. Attached Figure Description

[0013] Figure 1 This is a sectional view (side view) of the present invention.

[0014] Figure 2 This is a side view of the present invention.

[0015] Figure 3 This is a top view of the present invention. Detailed Implementation

[0016] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1-2As shown, a high-strength tunnel boring machine tooth includes a block-shaped tooth head body. The top side of the tooth head body is a working part 1, and at least one mounting groove 2 is provided on the working part 1. A hard alloy block 3 that matches the shape of the mounting groove 2 is embedded and welded into the mounting groove 2 and used as a working head 4. The rear of the working part 1 is an assembly part 5, and at least one mounting hole 6 that vertically penetrates the tooth head body is provided on the assembly part 5. A bolt is inserted into the mounting hole 6 for mounting the tooth head body on the tunnel boring machine.

[0019] The working head 4 is located directly below the side of the tooth body, which is an inwardly inclined first slope surface 7. The area behind the working head 4 is located on the upper surface of the tooth body and is inclined downward to form a second slope surface 8. The first slope surface 7 and the second slope surface 8 form a triangular working part 1, which is used to improve the soil breaking efficiency of the working head 4 in the working part assembly groove 2.

[0020] like Figure 3 As shown, there are three assembly slots 2, all of the same size and evenly arranged. Each assembly slot 2 has a matching cemented carbide block 3 welded inside, and a PCD diamond 9 is welded to the side of the cemented carbide block 3 away from the assembly part 5 to improve working efficiency. Multiple evenly distributed cemented carbide particles 10 are welded onto the PCD diamond 9 to improve the wear resistance of the working head 4.

[0021] There are two assembly holes 6 arranged in a front-to-back pattern. Each assembly hole 6 consists of a cylindrical positioning hole 11 arranged vertically and a cylindrical countersunk hole 12 arranged vertically. The positioning hole 11 and the countersunk hole 12 are concentric, and the diameter of the positioning hole 11 is larger than the diameter of the countersunk hole 12, while the height is smaller than the height of the countersunk hole 12.

[0022] The rear of the assembly hole 6 is located at both ends of the assembly part 5, which are inclined inward to form a tail 13 with a figure-eight structure. The tail 13 with a figure-eight structure is used to improve the overall appearance, wear resistance and facilitate the assembly of the tooth body.

[0023] This invention relates to a high-strength tunnel boring machine tooth design. The working head uses ultra-high strength and ultra-wear-resistant PCD tooth tips instead of traditional carbide tooth tips, significantly improving product lifespan and work efficiency while reducing tooth installation and disassembly. Furthermore, two positioning holes on the tooth head body are used for bolt fixation, facilitating installation and disassembly. The overall design of this invention is reasonable, allowing for convenient installation and disassembly. Its ultra-high strength and ultra-high wear resistance result in a long service life and greatly improve work efficiency.

[0024] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A high strength tunnel boring machine tooth comprising a blocky tooth head body, characterized by: The top side of the tooth head body is a working part (1), at least one assembly groove (2) is opened on the working part (1), a hard alloy block (3) matched with the assembly groove (2) is embedded and welded in the assembly groove (2), and the hard alloy block (3) is used as a working head (4), the rear of the working part (1) is an assembly part (5), at least one assembly hole (6) vertically penetrating the tooth head body is opened on the assembly part (5), and a bolt is inserted into the assembly hole (6) and used for mounting the tooth head body on the tunneling machine.

2. The high strength tunneling machine tooth of claim 1, wherein: The side surface of the tooth head body below the working head (4) is a first slope surface (7) inclined inward, the upper surface of the tooth head body behind the working head (4) is downwardly inclined to form a second slope surface (8), and the first slope surface (7) and the second slope surface (8) form a triangular working part (1), so that the breaking efficiency of the working head (4) in the working part assembly groove (2) is improved.

3. The high strength tunneling machine tooth of claim 2, wherein: The number of the assembly grooves (2) is three, the sizes are the same, and the assembly grooves (2) are uniformly arranged, a hard alloy block (3) matched with each assembly groove (2) is welded in each assembly groove (2), and a PCD diamond (9) is welded on the side, away from the assembly part (5), of the hard alloy block (3), so that the working efficiency is improved.

4. The high strength tunneling machine tooth of claim 3, wherein: A plurality of hard alloy particles (10) are uniformly distributed and welded on the PCD diamond (9), so that the wear resistance of the working head (4) is improved.

5. The high-strength TBM tooth of claim 1 or 4, wherein: The number of the assembly holes (6) is two, the assembly holes (6) are arranged in front and back, each assembly hole (6) is composed of a cylindrical positioning hole (11) arranged in up and down and a cylindrical counterbore (12), the positioning hole (11) and the counterbore (12) have the same center, the diameter of the positioning hole (11) is greater than that of the counterbore (12), and the height of the positioning hole (11) is less than that of the counterbore (12).

6. The high strength tunneling machine tooth of claim 5, wherein: The rear of the assembly hole (6) is located at both ends of the assembly part (5) and is inwardly inclined to form a splayed tail part (13), the splayed tail part (13) is used for improving the overall appearance, wear resistance and facilitating assembly of the tooth head body.

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