Hard rock heading machine cutterhead capable of changing gear teeth

Abstract

The utility model relates to the technical field of tunnel engineering, in particular to a hard rock heading machine cutterhead capable of changing gear teeth, which comprises a cutterhead body and a blocking assembly, the blocking assembly comprises a tooth holder, blocking teeth and a bayonet lock, the tooth holder is fixed on the cutterhead body, an inserting block is arranged on the tooth holder, an inserting groove for inserting the inserting block is arranged on the blocking teeth, and the bayonet lock is fixed on the blocking assembly. The tooth holder is provided with a first opening for the bayonet lock to insert, the retaining tooth is provided with a second opening corresponding to the first opening for the bayonet lock to insert, and the second opening is located at the position of the slot. According to the cutter head, the technical problem that cutter head blocking teeth in the prior art are inconvenient to replace is solved. By standardizing the sizes of parts of the retaining teeth, the parts of the retaining teeth are universal, and storage of spare parts is reduced. The buffering pad between the tooth holder and the blocking tooth can improve the durability of the blocking tooth to a certain degree, and the replacement efficiency of the blocking tooth is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, and particularly relates to a cutter head of a hard rock tunneling machine with replaceable retaining teeth. Background Art

[0002] With the development of society, it has become a trend to use TBM (Tunnel Boring Machine, full-face hard rock tunnel boring machine) to replace traditional drill-and-blast tunneling for various mountain tunnels. In TBM tunneling, large-sized rock blocks hitting internal equipment through the slag outlet of the cutter head and the slag conveyor belt account for a relatively high proportion of fault shutdowns. To reduce such faults, slag scraping plates are installed on the cutter head to facilitate slag entry, and retaining teeth are installed to prevent large-sized rock blocks from entering. Currently, the main installation method of the cutter head retaining teeth is to embed them into the cutter head and then weld them. Currently, they are mostly integrally formed. After damage, additional welding is carried out, but this installation method is prone to welding collapse and requires frequent repair welding, which consumes a lot of man-hours, resulting in waste of construction period costs and low equipment utilization rate. Moreover, the existing welded retaining teeth test welding technology. Due to harsh welding conditions, narrow space, difficult operation, difficult replacement after damage, and failure to reach the original strength, it is prone to secondary damage. Construction statistics show that many retaining teeth do not fail due to natural wear, but due to welding collapse during tunneling. At the same time, the repair welding of retaining teeth takes a long time, and the costs of personnel, materials, work delays, etc. generated are relatively high.

[0003] In summary, there is an urgent need for a retaining tooth that is convenient for quick replacement to solve the problems existing in the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cutter head of a hard rock tunneling machine with replaceable retaining teeth to solve the technical problem that the cutter head retaining teeth in the prior art are not convenient to replace. The specific technical solutions are as follows:

[0005] The utility model provides a cutter head of a hard rock tunneling machine with replaceable retaining teeth, which includes a cutter head body and a retaining assembly. The retaining assembly includes a tooth seat, a retaining tooth, and a retaining pin. The tooth seat is fixed on the cutter head body. The tooth seat is provided with an insertion block, and the retaining tooth is provided with a slot for the insertion block to be inserted. The tooth seat is provided with a first opening for the retaining pin to be inserted, and the retaining tooth is provided with a second opening corresponding to the first opening for the retaining pin to be inserted. The second opening is located at the position of the slot.

[0006] A further improvement of the cutter head of the hard rock tunneling machine with replaceable retaining teeth of the utility model is that the number of the first openings and the second openings is at least two. At least two of the first openings are arranged at intervals along the arc direction of the tooth seat, and the second openings are arranged in one-to-one correspondence with the first openings.

[0007] A further improvement of the cutter head of the hard rock tunneling machine with replaceable retaining teeth of the utility model is that the end of the retaining tooth away from the tooth seat forms a protruding end.

[0008] A further improvement of the cutter head of the hard rock roadheader with replaceable retaining teeth of the present utility model lies in that a buffer pad is installed on one side of the first opening away from the cutter head.

[0009] A further improvement of the cutter head of the hard rock roadheader with replaceable retaining teeth of the present utility model lies in that the material of the buffer pad is rubber.

[0010] A further improvement of the cutter head of the hard rock roadheader with replaceable retaining teeth of the present utility model lies in that the cutter head body and the tooth seat are of an integrally formed structure.

[0011] A further improvement of the cutter head of the hard rock roadheader with replaceable retaining teeth of the present utility model lies in that the number of the retaining components is multiple, and the multiple retaining components are arranged at intervals along the edge of the cutter head body.

[0012] Applying the technical solution of the present utility model has the following beneficial effects:

[0013] For the cutter head of the hard rock roadheader with replaceable retaining teeth of the present utility model, through the cooperation of the insertion block, the insertion slot and the pin, the rapid installation of the retaining teeth and the tooth seat is realized, solving the technical problem that the cutter head retaining teeth in the prior art are inconvenient to replace. The present utility model can make the parts between the retaining teeth universal by standardizing the part sizes of the retaining teeth, reducing the storage of spare parts. The buffer pad between the tooth seat and the retaining teeth can improve the durability of the retaining teeth to a certain extent and improve the replacement efficiency of the retaining teeth.

[0014] In addition to the purposes, features and advantages described above, the present utility model has other purposes, features and advantages. The following will refer to the drawings to make a further detailed description of the present utility model. Description of the Drawings

[0015] The drawings constituting a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the cutter head of the hard rock roadheader with replaceable retaining teeth of the present utility model;

[0017] Figure 2 is Figure 1 the sectional view taken along line A-A in

[0018] Among them, 1, tooth seat; 2, retaining tooth; 3, pin; 4, buffer pad; 5, cutter head body. Detailed Embodiment

[0019] The following will make a detailed description of the embodiments of the present utility model with reference to the drawings.

[0020] SeeFigure 1 and Figure 2 As shown in Figure 2 , a cutter head of a hard rock tunneling machine with replaceable retaining teeth includes a cutter head body 5 and a retaining component. The retaining component includes a tooth base 1, a retaining tooth 2, and a pin 3. The tooth base 1 is fixed on the cutter head body 5. An insertion block is provided on the tooth base 1, and a slot for inserting the insertion block is provided on the retaining tooth 2. A first opening for inserting the pin 3 is formed on the tooth base 1, and a second opening for inserting the pin 3 is formed on the retaining tooth 2 corresponding to the first opening. The second opening is located at the position of the slot. Further, the outer peripheral surface of the pin 3 can be a rough surface, and the inner walls of the first opening and the second opening are both rough surfaces. Thus, when the pin 3 is inserted into the first opening and the second opening, there is a large frictional force and it is not easy to fall off. The utility model directly standardizes the dimensions of the parts of the retaining tooth 2, makes the parts of the retaining tooth 2 have unified dimensions, so that the parts between the retaining teeth 2 are universal, and reduces the storage of spare parts. The setting of the retaining tooth 2 solves the problem that when the TBM tunnels in strata such as fracture zones and well-developed rock joints, large rock blocks generated due to stratum fragmentation get stuck in the retaining tooth 2. Under excessive acting force, the retaining tooth 2 is impacted and broken. Frequent shutdowns for repairing or welding the broken retaining tooth 2 result in delays in the normal construction on site, increased project costs in terms of personnel and material usage, and protects the internal equipment of the TBM and the slag discharge belt. The utility model can be applied to various working fields such as cutter heads with slag scraping retaining teeth 2, open-type, and shield-type TBMs of various models.

[0021] Preferably, the number of the first opening and the second opening is at least two. At least two of the first openings are arranged at intervals along the arc direction of the tooth base 1, and the second opening is arranged in one-to-one correspondence with the first opening. At least two openings can make the connection between the retaining tooth 2 and the tooth base 1 more firm. In this embodiment, the number of the first opening and the second opening is three.

[0022] Preferably, a protruding end is formed at one end of the retaining tooth 2 away from the tooth base 1, so as to avoid the accelerated damage of the edge of the retaining tooth 2 by large particle size rock blocks.

[0023] Preferably, a buffer pad 4 is installed on the side of the first opening away from the cutter head, which can improve the durability of the retaining tooth 2 to a certain extent.

[0024] Preferably, the material of the buffer pad 4 is rubber.

[0025] Preferably, the cutter head body 5 and the tooth base 1 are of an integrally formed structure, so that the cutter head body 5 and the tooth base 1 can be cast together.

[0026] Preferably, the number of the retaining components is multiple, and multiple retaining components are arranged at intervals along the edge of the cutter head body 5, so that the edge of the cutter head body 5 can be protected.

[0027] During the design stage of the cutter head, the design of the tooth seat 1 is added, and the tooth seat 1 and the cutter head body 5 are cast and delivered from the factory together. According to the size of the tooth seat 1, the sizes of the pin 3, the buffer pad 4 and the stop tooth 2 are designed, and the materials of the pin 3 and the stop tooth 2 are the same as that of the cutter head body. Install and debug according to the design drawings, install the buffer pad 4 into the tooth seat 1, then put the stop tooth 2 on the tooth seat 1, and finally insert the pin 3.

[0028] The cutter head of the hard rock tunneling machine with replaceable stop teeth of the present utility model realizes the quick installation of the stop tooth 2 and the tooth seat 1 through the cooperation of the insertion block, the slot and the pin 3, and solves the technical problem that the stop tooth 2 of the cutter head in the prior art is not convenient to replace. The present utility model can make the parts between the stop teeth 2 universal by standardizing the part sizes of the stop teeth 2, and reduces the storage of spare parts. The buffer pad 4 between the tooth seat 1 and the stop tooth 2 can improve the durability of the stop tooth 2 to a certain extent and improve the replacement efficiency of the stop tooth 2.

[0029] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hard rock tunnel boring machine cutter head with replaceable teeth, characterized in that: The invention comprises a cutter disc body (5) and a blocking assembly, wherein the blocking assembly comprises a tooth seat (1), a blocking tooth (2) and a bayonet (3); the tooth seat (1) is fixed on the cutter disc body (5); an insert block is provided on the tooth seat (1); the blocking tooth (2) is provided with a slot for inserting the insert block; a first opening is provided on the tooth seat (1) for inserting the bayonet (3); a second opening is provided on the blocking tooth (2) corresponding to the first opening for inserting the bayonet (3); the second opening is located at the position of the slot.

2. The hard rock tunnel boring machine cutter head with replaceable teeth according to claim 1, characterized in that: The number of the first openings and the number of the second openings are both at least two, at least two of the first openings are arranged at intervals along the arc direction of the gear seat (1), and the second openings are arranged in a one-to-one correspondence with the first openings.

3. The hard rock tunnel boring machine cutter head with replaceable teeth according to claim 1, characterized in that: A protruding end is formed at one end of the retaining tooth (2) away from the tooth seat (1).

4. The hard rock tunnel boring machine cutter head with replaceable teeth according to claim 1, characterized in that: A buffer pad (4) is installed on a side of the first opening away from the cutter disc.

5. The cutter head of a hard rock tunnel boring machine with replaceable teeth according to claim 4, characterized in that: The material of the buffer pad (4) is rubber.

6. The hard rock tunnel boring machine cutter head with replaceable teeth according to claim 1, characterized in that: The cutter disc body (5) and the tooth seat (1) are an integrally formed structure.

7. The hard rock tunnel boring machine cutter head with replaceable teeth according to claim 1, characterized in that: There are multiple blocking assemblies, and the multiple blocking assemblies are arranged at intervals along the edge of the cutter disc body (5).

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