Wear-resistant cutter ring for shield tunneling machine

Abstract

The utility model discloses a wear-resistant cutter ring for a shield tunneling machine, which comprises a cutter ring body, a plurality of wear-resistant cutter rings and a plurality of wear-resistant cutter rings, mounting surfaces are arranged on the upper side and the lower side of the cutter ring body; a plurality of cutter ring bolt holes are formed in the mounting surfaces; the wear-resistant layers are arranged on the mounting surfaces on the two sides of the cutter ring body; a plurality of wear-resistant layer bolt holes are formed in the wear-resistant layer; the wear-resistant grids are in a circular ring shape matched with the wear-resistant layer and are arranged on the two sides of the wear-resistant layer; a plurality of wear-resistant grid bolt holes which are consistent with the wear-resistant layer bolt holes in distribution are formed in the wear-resistant grid; the bottom of the connecting bolt sequentially penetrates through the wear-resistant grid and the wear-resistant layer and then is screwed into the cutter ring bolt hole; and the cutter ring body, the wear-resistant layer and the wear-resistant grid are screwed into the connecting bolts to form a spindle shape as a whole. The wear-resistant layer and the wear-resistant grid are additionally arranged to replace a cutter ring, so that the side face of the cutter ring is effectively prevented from being worn due to the fact that broken stones hit the side face of the cutter ring, contact friction between the side face of the cutter ring and a hard rock bottom layer is reduced, and the wear-resistant capacity of the cutter ring is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of tunnel construction devices, in particular to a wear-resistant cutter ring for a shield machine. Background Art

[0002] A shield machine is a heavy-duty piece of machinery used in underground tunnel construction, typically for excavating and building tunnels for urban rail transit, roads, pipelines, and other applications. Its primary function is to cut underground soil with a rotating cutter, remove the cut soil through a conveyor system, and install a support structure behind the front construction surface to prevent tunnel collapse.

[0003] Cutter ring wear is a common problem encountered during tunneling in hard rock formations. It weakens cutting capacity, increases power consumption, and reduces construction efficiency. Cutter ring wear also causes uneven cutting, reduced excavation accuracy, and lower tunnel quality. Severe cutter ring wear can lead to cutter ring fractures. Wear also increases the load on other components, increasing safety risks and failing to meet the high demands of hard rock formations. Among the causes of cutter ring wear, one is due to the cutter ring's direct, long-term contact with the underground soil and soil layers, exerting force to cut the soil, resulting in wear on the outer surface of the cutter ring, which is unavoidable normal wear. Another reason is that during the cutting process, the shield machine cutterhead rotates continuously, and the cutter ring itself rotates on the cutterhead end face to cut. This causes the cutter ring to directly hit the side of the cutter ring and get stuck in the gap in the cutter ring's mounting position, causing excessive lateral force on the cutter ring, leading to wear or damage. Utility Model Content

[0004] The utility model provides a wear-resistant cutter ring for a shield machine, which solves the problems of wear on the side of the traditional cutter ring caused by the cut soil or gravel directly hitting the side of the cutter ring during the excavation process of hard rock formations, and the problem of wear caused by gravel being stuck in the gap of the cutter ring installation position and excessive lateral force.

[0005] The utility model specifically provides a wear-resistant cutter ring for a shield machine, comprising:

[0006] The cutter ring body is annular and fixed on the cutter shaft; the cutter ring body has mounting surfaces on both the upper and lower sides, and the mounting surfaces have a number of cutter ring bolt holes;

[0007] The wear-resistant layer is annular and matches the cutter ring body, and is provided on the mounting surfaces on both sides of the cutter ring body; the wear-resistant layer is provided with a number of wear-resistant layer bolt holes that are distributed in the same manner as the cutter ring bolt holes;

[0008] The wear-resistant grid is annular and matches the wear-resistant layer and is arranged on both sides of the wear-resistant layer. The wear-resistant grid is provided with a number of wear-resistant grid bolt holes that are consistent with the distribution of the wear-resistant layer bolt holes.

[0009] The bottom of the connecting bolt passes through the wear-resistant grid and the wear-resistant layer in sequence, and then screws into the bolt hole of the cutter ring;

[0010] After the knife ring body, the wear-resistant layer and the wear-resistant grid are screwed into the connecting bolts, the whole body is in a spindle shape.

[0011] Particularly, the surface of the wear-resistant grid is further sprayed with a first wear-resistant alloy layer.

[0012] Particularly, a second wear-resistant alloy layer is further provided on the top of the connecting bolt, and the top of the second wear-resistant alloy layer protrudes from the wear-resistant grid surface.

[0013] In particular, it also includes a shock-absorbing washer arranged in the wear-resistant grid bolt hole, and the connecting bolt passes through the shock-absorbing washer.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] The utility model provides multi-layer protection for the cutter ring by arranging a wear-resistant layer and a wear-resistant layer grid, effectively avoiding the wear of the side of the cutter ring caused by the hard rock formation fragments hitting the side of the cutter ring, reducing the contact friction between the side of the cutter ring and the hard rock formation, and effectively improving the wear resistance of the cutter ring; the wear-resistant grid can be quickly replaced at any time by screwing in the bolt connection method, which is convenient for maintenance; in certain special circumstances, when the wear-resistant grid cannot be replaced in time, the wear-resistant layer also protects the cutter ring body, further improving the wear resistance of the side of the cutter ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the device of the utility model.

[0017] Figure 2 Schematic diagram of the wear-resistant grid structure.

[0018] Figure 3 Schematic diagram of the wear-resistant layer structure.

[0019] Figure 4 Schematic diagram of the bolt structure.

[0020] The meanings of the numbers in the figure are: cutter ring body - 1; cutter shaft - 2; mounting surface - 3; wear-resistant layer - 5; wear-resistant layer bolt hole - 6; wear-resistant grid - 7; wear-resistant grid bolt hole - 8; connecting bolt - 9; second wear-resistant alloy layer - 10. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention, so as to have a further understanding of the concept of the present invention, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0022] like Figures 1 to 4 As shown, a wear-resistant cutter ring for a shield machine includes:

[0023] The cutter ring body 1 is annular and fixed on the cutter shaft 2. The cutter ring body 1 is provided with mounting surfaces 3 on both the upper and lower sides. The mounting surfaces 3 are provided with a plurality of cutter ring bolt holes.

[0024] The wear-resistant layer 5 is annular and matches the cutter ring body 1 and is provided on the mounting surfaces 3 on both sides of the cutter ring body 1. The wear-resistant layer 5 is provided with a plurality of wear-resistant layer bolt holes 6 that are distributed in the same manner as the cutter ring bolt holes.

[0025] The wear-resistant mesh 7 is annular and matches the wear-resistant layer 5 and is provided on both sides of the wear-resistant layer 5. The wear-resistant mesh 7 is provided with a plurality of wear-resistant mesh bolt holes 8 that are distributed in the same manner as the wear-resistant layer bolt holes 6.

[0026] The bottom of the connecting bolt 9 passes through the wear-resistant mesh 7 and the wear-resistant layer 5 in sequence, and then screws into the bolt hole of the cutter ring;

[0027] After the cutter ring body 1 , the wear-resistant layer 5 and the wear-resistant grid 7 are screwed into the connecting bolts 9 , the whole is in a spindle shape.

[0028] In the present utility model, the main principle is as follows: the wear-resistant mesh, wear-resistant layer 5 and cutter ring body 1 are connected into a whole by connecting bolts 9, so that the wear-resistant mesh 7 contacts the gravel of the hard rock formation before the cutter ring body 1 during excavation, providing the first line of protection for the cutter ring body 1; at the same time, the wear-resistant mesh 7 and wear-resistant layer 5 are fixed to the cutter ring body 1 by connecting bolts 9, so that the wear-resistant mesh 2 can be quickly replaced. After the wear-resistant mesh 7 is worn, a new wear-resistant mesh is replaced, providing the second line of protection for the cutter ring body 1. In addition, an additional wear-resistant layer 5 is provided between the cutter ring body 1 and the wear-resistant mesh 7 as an additional protection when some points of the wear-resistant mesh 7 are severely worn for some reasons and the wear-resistant mesh 7 cannot be replaced in time, avoiding direct impact on the cutter ring body 1, and providing the third line of protection for the cutter ring body 1.

[0029] As a preferred embodiment, the surface of the wear-resistant grid 7 is further sprayed with a first wear-resistant alloy layer.

[0030] In this embodiment, a first wear-resistant alloy layer is sprayed onto the surface of the wear-resistant mesh 7, ensuring that the wear-resistant mesh 7 first contacts the hard rock formation with the first wear-resistant alloy layer before contacting the hard rock formation, thereby further enhancing the wear resistance of the wear-resistant mesh 7. The first wear-resistant alloy layer can be made of pure aluminum. Pure aluminum's high hardness and wear resistance allow it to withstand significant wear and friction, while also reducing noise and vibration during tunneling.

[0031] As a preferred embodiment, a second wear-resistant alloy layer 10 is further provided on the top of the connecting bolt 9 , and the top of the second wear-resistant alloy layer 10 protrudes from the surface of the wear-resistant grid 7 .

[0032] In this embodiment, by providing a second wear-resistant alloy layer 10 protruding from the surface of the wear-resistant mesh 7 on the top of the connecting bolt 9, the second wear-resistant alloy layer 10 is brought into contact with the soil layer earlier than the wear-resistant mesh 7, thereby adding another layer of protection to the knife ring body 1 as a whole. The second wear-resistant alloy layer 10 can be made of tungsten carbide or DC-53 steel, both of which are materials with high wear resistance and high toughness to obtain better wear resistance. It should be noted that the second wear-resistant alloy layer 10 is a semicircular structure pre-welded on the top upper surface of the connecting bolt 9, and its range does not exceed the projection range of the top nut of the connecting bolt 9 to avoid affecting the screwing-in process of the connecting bolt 9. The connecting bolt 9 can be screwed in with a hexagonal socket. After being screwed in, the top nut of the connecting bolt 9 is located entirely inside the wear-resistant mesh 7, and only the second wear-resistant alloy layer 10 exceeds the upper surface of the wear-resistant mesh 7.

[0033] As a preferred embodiment, it further includes a shock-absorbing washer arranged in the wear-resistant grid bolt hole 8, and the connecting bolt 9 passes through the shock-absorbing washer.

[0034] In this embodiment, shock-absorbing washers are provided in the wear-resistant grid bolt holes 8 to reduce the impact of vibrations during the excavation process on the connecting bolts 9, thereby preventing the connecting bolts 9 from loosening and slipping during the excavation process.

[0035] The words "connection" and "fixation" appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0036] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wear-resistant cutter ring for a shield machine, characterized in that: include: The cutter ring body (1) is annular and fixed on the cutter shaft (2); the cutter ring body (1) is provided with mounting surfaces (3) on both upper and lower sides, and the mounting surfaces (3) are provided with a plurality of cutter ring bolt holes; The wear-resistant layer (5) is annular and matches the cutter ring body (1), and is provided on the mounting surfaces (3) on both sides of the cutter ring body (1); the wear-resistant layer (5) is provided with a plurality of wear-resistant layer bolt holes (6) that are distributed in the same manner as the cutter ring bolt holes; The wear-resistant grid (7) is annular and matches the wear-resistant layer (5), and is arranged on both sides of the wear-resistant layer (5); the wear-resistant grid (7) is provided with a plurality of wear-resistant grid bolt holes (8) that are distributed in the same manner as the wear-resistant layer bolt holes (6); The bottom of the connecting bolt (9) passes through the wear-resistant grid (7) and the wear-resistant layer (5) in sequence and is screwed into the bolt hole of the cutter ring; After the knife ring body (1), the wear-resistant layer (5) and the wear-resistant grid (7) are screwed into the connecting bolt (9), the whole is in a spindle shape.

2. A wear-resistant cutter ring for a shield machine according to claim 1, characterized in that: The surface of the wear-resistant grid (7) is also sprayed with a first wear-resistant alloy layer.

3. A wear-resistant cutter ring for a shield machine according to claim 1, characterized in that: A second wear-resistant alloy layer (10) is also provided on the top of the connecting bolt (9), and the top of the second wear-resistant alloy layer (10) protrudes from the surface of the wear-resistant grid (7).

4. A wear-resistant cutter ring for a shield machine according to claim 1, characterized in that: It also includes a shock-absorbing washer arranged in the wear-resistant grid bolt hole (8), and the connecting bolt (9) passes through the shock-absorbing washer.

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