Axial and lateral bidirectional excavation cutterhead

Abstract

The present invention discloses an axial and lateral bidirectional excavation cutter disc, which solves the problem in the prior art that the TBM cutter disc can only achieve axial propulsion and the excavation section is limited. The present invention comprises a cutter disc body, a front cutter is provided on the front end face of the cutter disc body, a side cutter is provided on the outer edge of the front end face of the cutter disc body, and a side cutter and a slag inlet are provided on the outer circumference of the cutter disc body. The present invention performs axial excavation through the front cutter, radial excavation through the side cutter, and skew excavation through the side cutter. The present invention can achieve bidirectional and skew excavation, and the front cutter and the side cutter can work intermittently and alternately, which changes the excavation method and increases the service life of the cutter. It is a major innovation in tunnel excavation.

Description

Technical Field

[0001] The invention relates to the technical field of shield machines, in particular to an axial and lateral bidirectional excavation cutter head. Background Art

[0002] During tunnel construction, the shield machine uses the cutterhead and cutter to cut the soil in front. The adaptability between the cutterhead and the soil is crucial. Different soils require different cutterhead and cutter configurations to excavate them so that the shield machine can complete rapid excavation construction.

[0003] The existing cutterhead structures are mainly panel type and spoke type. However, regardless of whether it is panel type or spoke type, the TBM cutterhead currently used for hard rock tunnel excavation can only achieve advancement along the tunnel axis, and the excavation section is a circular section. It cannot perform radial excavation and special-shaped surface excavation. In order to achieve the excavation of special sections, the excavation cutterhead is required to have the function of excavation in both axial and lateral directions. Therefore, the bidirectional excavation cutterhead has become a research focus. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes an axial and lateral bidirectional excavation cutterhead, which solves the problem in the prior art that the TBM cutterhead can only achieve axial propulsion and the excavation section is limited.

[0005] The technical solution of the present invention is implemented as follows: an axial and lateral bidirectional excavation cutter disc includes a cutter disc body, a front cutter is provided on the front end face of the cutter disc body, a side roller is provided on the outer edge of the front end face of the cutter disc body, and a side cutter and a slag inlet are provided on the outer circumference of the cutter disc body.

[0006] The side roller is tilted outwards, and the tilt angle θ of the side roller is 30°~60°.

[0007] The height of the side cutter extending out of the cutter disc body is greater than the height of the front cutter extending out of the cutter disc body; the width of the side cutter extending out of the cutter disc body is greater than the width of the side cutter extending out of the cutter disc body.

[0008] An arc transition zone is provided between the front end surface of the cutter disc body and the outer circumference of the cutter disc body, and the edge hob is arranged at the arc transition zone.

[0009] At least two slag inlets are arranged on the outer circumference of the cutter disc body, and a group of side cutters is arranged between two adjacent slag inlets.

[0010] The group of side cutters includes a plurality of side cutters, and the side cutters are spirally arranged on the outer circumference of the cutter disc body, and the cutting direction of the side cutters is perpendicular to the forward direction of the cutter disc body.

[0011] The present invention performs axial excavation through the front cutter, radial excavation through the side cutter, and eccentric excavation through the side cutter. When the cutter disc is pushed forward horizontally under the action of the driving device, the front cutter of the cutter disc and the side cutter in the arc transition zone work, the excavation contour of the side cutter exceeds the excavation surface of the side cutter, and the side cutter does not work, thereby protecting the side cutter from horizontal force and ensuring that the side cutter is not damaged during horizontal advancement; when the cutter disc works radially under the action of the driving device, the side cutters and the side cutters of the cutter disc work, the front cutter does not work, and the excavation surface of the side cutter exceeds the excavation contour of the front cutter, thereby preventing the front cutter from being stressed and ensuring that the front cutter of the cutter disc is not damaged. The present invention can realize bidirectional and eccentric excavation, and the front cutter and the side cutter can work intermittently and alternately, changing the excavation method and increasing the service life of the cutter, which is a major innovation in tunnel excavation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0013] Figure 1 It is a schematic side view of the whole of the present invention.

[0014] Figure 2 It is a schematic diagram of the installation of the side hob of the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1-2 As shown, embodiment 1 is an axial and lateral bidirectional excavation cutter disc, comprising a cutter disc body 1. A plurality of front cutters 2 are provided on the front end face of the cutter disc body 1. The front cutters 2 can be roller cutters. The cutting direction of the front cutters is the same as the direction of the central axis of the cutter disc body, and is used for axial excavation. A plurality of side roller cutters 3 are provided on the outer edge of the front end face of the cutter disc body 1. The side roller cutters 3 can be used for axial excavation and radial excavation. A plurality of side cutters 4 and a plurality of slag inlets 5 are provided on the outer circumference of the cutter disc body 1. The side cutters 4 are used for radial excavation. The slag excavated by the front cutters 2, the side roller cutters 3 and the side cutters 4 enters the cutter disc body through the slag inlet 5, and is transported out through the slag conveying mechanism provided at the rear.

[0017] Furthermore, the side cutter 3 is tilted outward, and the tilt angle θ of the side cutter 3 is 30° or 60°. The tilted side cutter increases the excavation area and can be used for excavation on different surfaces. The height of the side cutter 3 extending out of the cutter disc body 1 is greater than the height of the front cutter 2 extending out of the cutter disc body 1; the width of the side cutter 3 extending out of the cutter disc body 1 is greater than the width of the side cutter 4 extending out of the cutter disc body 1. When the cutter disc is pushed forward horizontally under the action of the drive device, the front cutter of the cutter disc and the side cutter in the arc transition zone work, the excavation contour of the side cutter exceeds the excavation surface of the side cutter, and the side cutter does not work, thereby protecting the side cutter from horizontal force and ensuring that the side cutter is not damaged during horizontal advancement; when the cutter disc works radially under the action of the drive device, the side cutters and the side cutters of the cutter disc work, the front cutter does not work, and the excavation surface of the side cutter exceeds the excavation contour of the front cutter, thereby making the front cutter free from force and ensuring that the front cutter of the cutter disc is not damaged

[0018] Embodiment 2, an axial and lateral bidirectional excavation cutter disc, the side cutter 3 is tilted outward, and the tilt angle θ of the side cutter 3 is 45°. An arc transition zone is provided between the front end face of the cutter disc body 1 and the outer circumference of the cutter disc body 1, and the side cutter 3 is provided at the arc transition zone. The width of the arc transition zone is greater than the diameter of the outer circumference of the cutter disc body, and the arc transition zone extends forward from the front end face of the cutter disc body, so that the excavation profile of the side cutter is greater than the excavation profile of the front cutter and the side cutter, respectively, and is used to protect the front cutter and the side cutter.

[0019] Furthermore, at least two slag inlets 5 are provided on the outer circumference of the cutter disc body 1, and four of them can be provided at equal distances, and a group of side cutters 4 is provided between two adjacent slag inlets 5. The group of side cutters 4 includes a plurality of side cutters, which are spirally arranged on the outer circumference of the cutter disc body 1 to disperse the side cutters and concentrate the force to achieve comprehensive excavation. The cutting direction of the side cutters 4 is perpendicular to the forward direction of the cutter disc body 1, that is, the side cutters are vertically arranged on the outer circumference of the cutter disc body for radial excavation.

[0020] The other structures are the same as those in Example 1.

[0021] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-way excavation cutter disc with axial and lateral directions, characterized in that: It comprises a cutter disc body (1), a front cutter (2) being provided on the front end surface of the cutter disc body (1), a side cutter (3) being provided on the outer edge of the front end surface of the cutter disc body (1), and a side cutter (4) and a slag inlet (5) being provided on the outer circumference of the cutter disc body (1); The side roller (3) is arranged to be inclined outward, and the height of the side roller (3) extending out of the cutter disc body (1) is greater than the height of the front blade (2) extending out of the cutter disc body (1); the width of the side roller (3) extending out of the cutter disc body (1) is greater than the width of the side blade (4) extending out of the cutter disc body (1); When the cutter disc is pushed forward horizontally under the action of the driving device, the front cutter of the cutter disc and the side cutter in the arc transition zone work, the excavation contour of the side cutter exceeds the excavation surface of the side cutter, and the side cutter does not work, thereby protecting the side cutter from horizontal force and ensuring that the side cutter is not damaged when pushed horizontally; when the cutter disc is working radially under the action of the driving device, the side cutters and the side cutters of the cutter disc work, the front cutter does not work, and the excavation surface of the side cutter exceeds the excavation contour of the front cutter, thereby preventing the front cutter from being subjected to force and ensuring that the front cutter of the cutter disc is not damaged; At least two slag inlets (5) are provided on the outer circumference of the cutter disc body (1), and a group of side knives (4) is provided between two adjacent slag inlets (5); the group of side knives (4) comprises a plurality of side knives, the side knives are spirally arranged on the outer circumference of the cutter disc body (1), and the cutting direction of the side knives (4) is perpendicular to the forward direction of the cutter disc body (1).

2. The axial and lateral bidirectional excavation cutterhead according to claim 1, characterized in that: The inclination angle θ of the edge hob (3) is 30° to 60°.

3. The axial and lateral bidirectional excavation cutter disc according to any one of claims 1 to 2, characterized in that: An arc transition zone is provided between the front end surface of the cutter disc body (1) and the outer circumference of the cutter disc body (1), and the edge hob (3) is arranged in the arc transition zone.

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