Cutting head of heading machine

Abstract

The utility model relates to the field of rock drilling equipment, in particular to a cutting head of a heading machine. Comprising a cutting head body, the cutting head body is a circular truncated cone, and a plurality of tooth holders are arranged on the cutting head body; the cutting teeth are arranged on the tooth holders, the multiple tooth holders are sequentially arranged along the peripheral wall of the cutting head body in the shape of a spiral line, and the lead angle of the spiral line is increased from the bottom end of the cutting head body to the top end of the cutting head body; the spiral line comprises a plurality of spiral line sections which are sequentially connected from the bottom end to the top end of the cutting head body. The cutting head provided by the utility model can be used for slotting operation of an underground closed groove by the existing equipment, the circular truncated cone can meet the shape requirement of the closed groove, and the cutting teeth are arranged in a manner of increasing the lead angle from the bottom to the top of the cutting head body, so that the axial distance of the cutting teeth at the top of the cutting head is properly increased; and the pick density at the top of the cutting head is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of rock drilling equipment, in particular to a cutting head of a tunnel boring machine. Background Art

[0002] The underground tunnels need to be sealed at certain intervals. To construct the sealed wall, a rectangular sealed groove needs to be opened around the tunnel wall.

[0003] There are two existing grooving methods. The first is manual work, which is undoubtedly backward and unsafe. It requires workers to use pneumatic picks, which is inefficient. Workers also need to climb up to the top plate and the upper part of the tunnel, which greatly increases the unsafe factors. At present, it takes 5 workers more than 3 days to make a closed groove.

[0004] The second type of slotting machine designed by the manufacturer is an independent mechanical equipment. It has an independent power system and requires an independent power supply. It can meet the construction needs of opening closed slots, but it requires the purchase of a dedicated equipment, which is expensive. Secondly, the limited space in the underground tunnel cannot accommodate multiple devices to operate simultaneously. The working place of the tunnel boring machine and the cross-sectional width of the tunnel are basically no more than 6 meters. The front shovel of a tunnel boring machine is 3-5 meters wide, and there is no space for parallel operation. The tunnel boring machine must be returned to a more spacious space to arrange for other equipment to operate, and the preparation time is long. Furthermore, dedicated equipment requires professional operators, which increases personnel expenses. Existing cutting heads such as Figure 6 As shown, the surface of the cutting head is arc-shaped, which easily leads to the side wall of the closed groove being a curved surface, resulting in instability of the side wall of the closed groove. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the roadheader cannot groove the tunnel wall, thereby providing a roadheader cutting head.

[0006] In order to solve the above problems, the utility model provides a cutting head for a roadheader, comprising:

[0007] A cutting head body, the cutting head body is a frustum, and a plurality of tooth seats are arranged on the cutting head body;

[0008] The cutting teeth are arranged on the tooth seat, and a plurality of the tooth seats are arranged in sequence along the outer peripheral wall of the cutting head body in the shape of a spiral line, and the helix angle of the spiral line increases from the bottom end of the cutting head body to the top end of the cutting head body; the spiral line includes a plurality of spiral line segments connected in sequence from the bottom end to the top end of the cutting head body.

[0009] Optionally, the bottom angle α of the cutting head body is 30°-60°.

[0010] Optionally, the number N of the spiral segments is ≧2.

[0011] Optionally, the cutting teeth at the starting end of the spiral line are located at the bottom corner of the cutting head body.

[0012] Optionally, the angle β between the cutting tooth and the cutting head body is 15°-60°.

[0013] Optionally, a threaded hole is provided in the cutting head, the cutting head is threadedly connected to the top of the swing arm, and a locking nut is provided on the top of the cutting head body.

[0014] Optionally, the upper bottom surface area of ​​the cutting head body is smaller than the lower bottom surface area, and the swing arm is installed from the lower bottom surface to the upper bottom surface.

[0015] The utility model has the following advantages:

[0016] Compared with the prior art, which requires replacement of the entire equipment or manual grooving, the cutting head of the utility model can be replaced after excavation, and has the advantage of easy installation and disassembly. It does not require manual operation of holding a pneumatic pick, which greatly reduces the labor intensity. The same tunnel requires at least 5 people to work, and the working time is 2-3 days. The cutting head of the utility model only takes 2 hours, and the efficiency increases exponentially. The use of the cutting head does not require the investment of new equipment, which saves expenses and saves tunnel space. The cutting head body is a frustum, and the several cutting head bodies arranged on the frustum are more in line with the shape of the closed groove, ensuring that the side walls of the closed groove are flat, thereby ensuring the stability of the closed groove. In addition, since the cutting head adopts a tooth arrangement method with an increased spiral angle from the bottom to the top of the cutting head body, the axial spacing of the cutting teeth at the top of the cutting head is appropriately increased, which effectively improves the density of the cutting teeth at the top of the cutting head, is beneficial to the high efficiency of cutting and material discharge, improves efficiency, and reduces the wear of the tooth seat and the cutting teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic top view of the tunnel boring machine at work is shown;

[0019] Figure 2 A schematic cross-sectional view of a roadway is shown;

[0020] Figure 3 The schematic diagram of the structure of the slotting and cutting head of the roadheader is shown;

[0021] Figure 4 The working schematic diagram of the cutting head of the roadheader is shown;

[0022] Figure 5 A schematic diagram showing the angle between the cutting teeth and the cutting head body;

[0023] Figure 6 A schematic diagram of an existing cutting head is shown.

[0024] Description of reference numerals:

[0025] 1. Sealed groove; 2. Car body; 3. Swing arm; 4. Cutting head body; 5. Cutting teeth; 6. Threaded hole; 7. Tooth seat; 8. Locking nut. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] This embodiment provides a cutting head, such as Figure 1-Figure 4 As shown, it includes a cutting head body 4, a tooth seat 7 arranged on the cutting head body 4, and a cutting tooth 5 arranged on the tooth seat 7. Among them, the cutting head body 4 is a truncated cone, and a plurality of tooth seats 7 are arranged on the cutting head body 4. The plurality of tooth seats 7 are arranged in sequence along the outer peripheral wall of the cutting head body 4 in the shape of a spiral line, and the spiral angle of the spiral line increases from the bottom end of the cutting head body 4 to the top end of the cutting head body 4; the spiral line includes a plurality of spiral line segments connected in sequence from the bottom end to the top end of the cutting head body 4, the upper bottom surface area of ​​the cutting head body 4 is smaller than the lower bottom surface area, and the swing arm 3 is installed from the lower bottom surface to the upper bottom surface direction.

[0029] This embodiment can replace the cutting head of the utility model after excavation, which has the advantage of easy installation and disassembly. It does not need to be operated manually with a pneumatic pick, which greatly reduces the labor intensity. Secondly, its safety is significantly improved and the work efficiency is improved. The use of this cutting head does not require the investment of new equipment, saves expenses, and saves tunnel space.

[0030] The angle β between the cutting teeth 5 and the cutting head body 4 is 15°-60°, and the angle of the tooth seat 7 is adjusted according to the different tunnels and the sealing grooves 1 to be excavated.

[0031] Preferably, the number of spiral segments N≧2, Figure 3 This is a schematic diagram when N=2.

[0032] During operation, this embodiment first enters through point A4 and grooves are cut along the bottom wall until the width of the closed groove 1 is opened, which is the distance between points A3 and A2. Since there is a certain angle between the tooth seat 7 and the cutting head body 4, it is ensured that the cutting head can smoothly cut out the upper wall when cutting from point A1 to point A2.

[0033] As the helix angle of the spiral line formed by the arrangement of multiple tooth seats 7 increases, the axial spacing of the cutting teeth 5 located at the top of the cutting head body 4 is appropriately increased, which improves the density of the cutting teeth 5 at the top of the cutting head, is conducive to the timely removal of cut rock cuttings, and makes the cutting head discharge effect better. Furthermore, due to the smooth discharge, the cutting efficiency of the cutting head can be improved, and the wear of the cutting teeth 5 and the tooth seat 7 can be reduced. The cutting head can be used for existing equipment to perform underground closed groove grooving operations, and the round table can ensure that when the cutting head is excavated, it is more in line with the shape of the closed groove 1, thereby improving the excavation efficiency.

[0034] Preferably, the bottom angle α of the cutting head body 4 is 30°-60°, so as to ensure that the bottom angle of the cutting head is small and the closed groove 1 is easily excavated.

[0035] Preferably, the cutting teeth at the starting end of the spiral line are infinitely close to the bottom angle of the cutting head body, so as to ensure that a closed groove 1 of a specified width can be excavated.

[0036] Based on the above facts, in a preferred embodiment, a threaded hole 6 is opened in the cutting head, the cutting head is threadedly connected to the top of the swing arm 3, and a locking nut 8 is arranged on the top of the cutting head body 4 to lock and fix the cutting head and the swing arm 3 for easy disassembly.

[0037] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A cutting head of a roadheader, arranged on a swing arm (3) of a roadheader body (2), characterized in that: include: A cutting head body (4), the cutting head body (4) being a frustum, and a plurality of tooth seats (7) being arranged on the cutting head body (4); A cutting tooth (5) is arranged on the tooth seat (7), wherein a plurality of the tooth seats (7) are sequentially arranged in the shape of a spiral line along the outer peripheral wall of the cutting head body (4), and the spiral angle of the spiral line increases from the bottom end of the cutting head body (4) to the top end of the cutting head body (4); the spiral line comprises a plurality of spiral line segments sequentially connected from the bottom end to the top end of the cutting head body (4); The angle β between the cutting teeth (5) and the cutting head body (4) is 15°-60°; A threaded hole (6) is provided in the cutting head body (4), the cutting head body (4) is threadedly connected to the top of the swing arm (3), and a locking nut (8) is provided on the top of the cutting head body (4).

2. A cutting head for a roadheader according to claim 1, characterized in that: The bottom angle α of the cutting head body (4) is 30°-60°.

3. A cutting head for a roadheader according to claim 1, characterized in that: The number of the spiral segments N≧2.

4. A cutting head for a roadheader according to claim 1, characterized in that: The cutting teeth (5) at the starting end of the spiral line are located at the bottom corner of the cutting head body (4).

5. A cutting head for a roadheader according to claim 1, characterized in that: The upper bottom surface area of ​​the cutting head body (4) is smaller than the lower bottom surface area, and the swing arm (3) is installed from the lower bottom surface to the upper bottom surface.

Images