Profiling cutter of shield tunneling machine

Abstract

The utility model discloses a copying cutter of a shield tunneling machine, belongs to the technical field of copying tunneling of the shield tunneling machine, and aims to solve the problems that the tunneling allowance is difficult to control, the tunneling speed during turning is limited and the cutter cannot be maintained in the prior art. The copying cutter of the shield tunneling machine comprises a cutter body and a cutter blade, wherein the cutter body is of a conical barrel-shaped structure; the annular cutting edges and the cutter body are integrally formed, the annular cutting edges are coaxially arranged on the outer surface of the cutter body, the outer edges of the cutting edges are located on the same conical surface, and the small-size end of the conical surface where the outer edges of the cutting edges are located and the small-size end of the cutter body are located at the same end; the cutter shaft and the cutter body are coaxially arranged; the bearing is arranged between the cutter shaft and the inner control surface of the cutter body; the end covers are buckled at the two ends of the cutter body, floating oil seals are arranged at the joints of the end covers and the cutter body, and the cutter shaft penetrates through the end covers at the two ends.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield machine profile excavation, and in particular relates to a shield machine profile cutter. Background Art

[0002] Shield machines are generally designed with profiling cutters, which are arranged at both ends of the spokes. During construction, the profiling cutters can be radially extended and retracted from both ends of the spokes according to the requirements of the over-excavation amount and over-excavation range to achieve the purpose of profiling cutting. Figure 1 At present, the profiling cutter 1 of the shield machine is a cylindrical alloy tearing cutter. The hydraulic cylinder seat is fixed to the spokes of the cutter disc from the cutter disc inspection cover, and the profiling cutter 1 and the fixing seat 2 are locked and fixed by bolts. The telescopic distance of the profiling cutter 1 is achieved by controlling the oil cylinder 3, so as to ensure the curve engineering such as turning correction during the excavation of the shield machine and prevent the shield machine from getting stuck when turning. However, due to the limitation of the shape of the cutter, the excavation margin cannot be well controlled during excavation, which limits the excavation rate of the shield machine when turning. In addition, the cutter cannot be repaired, and the only way to replace the cutter is to replace the entire cutter. Utility Model Content

[0003] The utility model aims to provide a shield machine profiling cutter to solve the problems in the prior art that the excavation margin is difficult to control, the excavation rate is limited when turning, and the cutter cannot be repaired.

[0004] To achieve the above-mentioned purpose, a shield machine profiling cutter of the utility model comprises:

[0005] A knife body, wherein the knife body is a conical cylindrical structure;

[0006] A plurality of annular blades integrally formed with the blade body and coaxially arranged on the outer surface of the blade body, wherein the outer edges of the plurality of blades are located on the same conical surface, and the small-sized end of the conical surface where the outer edges of the plurality of blades are located is located on the same end as the small-sized end of the blade body;

[0007] A knife shaft coaxially arranged with the knife body;

[0008] A bearing disposed between the cutter shaft and the inner control surface of the cutter body;

[0009] And end covers buckled on the two ends of the knife body, a floating oil seal is arranged at the junction of the end cover and the knife body, and the knife shaft passes through the end covers at both ends.

[0010] The angle between the rear edge of one blade and the front edge of the other blade is 55 degrees. The angle between the conical surface where the outer edges of the blades are located and the cylindrical surface where the largest blade is located is 22 degrees.

[0011] The blades include a first blade, a second blade, a third blade and a fourth blade in increasing sizes; the value range of the angle α between the front blade surface of the first blade and the outer surface of the blade body is: 150°≤α≤130°.

[0012] The included angle α between the front edge surface of the first blade and the outer surface of the blade body is 150°.

[0013] The value range of the angle β between the rear edge surface of the fourth cutting edge and the cylindrical surface where the outer diameter of the fourth cutting edge is located is: 60°≤β≤35°.

[0014] The included angle β between the rear edge surface of the fourth cutting edge and the cylindrical surface where the outer diameter of the fourth cutting edge is located is 60°.

[0015] The beneficial effects of the utility model are as follows: the shield machine profiling cutter of the utility model is assembled on the contour of the arc starting area of ​​the shield machine cutter head, and the outer diameter of the tunnel is expanded to enable the shield machine to over-dig when turning or correcting, so that the shield machine can turn to a specific side.

[0016] The shield machine profiling cutter is locked and fixed on the cutter holder, and the cutter holder is connected to the retractable cylinder by bolts, so as to adjust the over-excavation of the shield machine profiling cutter hydraulically. The blade of the profiling cutter imitates the contour of the arc starting area of ​​the shield machine cutter disc, making the shield machine excavation more gentle. The profiling cutter is installed in the arc starting area of ​​the cutter disc in the form of a hob. The more blades there are in the arc starting area of ​​the cutter disc, the gentler the arc. Due to the limited space of the cutter disc, the blades are designed on the same cutter body, and this shape tool is designed in the form of a hob, which can greatly reduce the torque of the cutter disc. At the same time, according to the over-excavation range, the profiling cutter is extended and retracted to achieve the purpose of profiling. When the shield machine is advancing, turning or correcting the curve section, the profiling cutter of the multi-blade hob ensures that the shield machine can achieve curve advancement, smooth turning and correction under the condition of little interference to the surrounding soil. Since the profiling cutter is installed on the outermost side of the cutter disc, it will be subjected to greater impact force during the excavation process. In order to ensure the stability of the cutter blade of the hob, the cutter blade is combined with the cutter body forged as a whole. The entire integrated cutter is designed at a specific angle according to the position where the cutter is installed. The integrated molding makes the cutter structure more stable and convenient for subsequent maintenance and replacement of accessories. The roller cutter can ensure a smoother tunnel face during excavation, while increasing the number of blades of the cutter and improving excavation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure and installation of the profiling knife in the prior art;

[0018] Figure 2 This is a schematic diagram of the overall structure of a shield machine profiling cutter of the utility model;

[0019] Figure 3 This is a schematic diagram of the installation position of a shield machine profiling cutter on the cutterhead of the utility model;

[0020] Figure 4 This is a schematic diagram of the installation structure of a shield machine profiling cutter of the utility model;

[0021] Figure 5 A schematic diagram of the working trajectory of a shield machine profiling cutter of the utility model;

[0022] Among them: 1. contour knife, 2. fixed seat, 3. oil cylinder, 4. knife body, 5. blade, 501. first blade knife, 502. second blade knife, 503. third blade knife, 504. fourth blade knife, 6. knife shaft, 7. bearing, 8. end cover, 9. floating oil seal, 10. knife disc, 1001, arc starting area, 11. knife seat, 12. oil cylinder seat, 13. locking piece, 14. knife box. DETAILED DESCRIPTION

[0023] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] See also Figure 1-Figure 5 A shield machine profiling cutter of the utility model comprises:

[0025] A knife body 4, wherein the knife body 4 is a conical cylindrical structure;

[0026] A plurality of annular blades 5 are integrally formed with the blade body 4 and coaxially arranged on the outer surface of the blade body 4, the outer edges of the plurality of blades 5 are located on the same conical surface, and the small-sized end of the conical surface where the outer edges of the plurality of blades 5 are located is located at the same end as the small-sized end of the blade body 4;

[0027] A knife shaft 6 coaxially arranged with the knife body 4;

[0028] A bearing 7 is arranged between the blade shaft 6 and the inner control surface of the blade body 4;

[0029] And end covers 8 are buckled on both ends of the cutter body 4, a floating oil seal 9 is provided at the junction of the end cover 8 and the cutter body 4, and the cutter shaft 6 passes through the end covers 8 at both ends.

[0030] Among two adjacent cutting edges 5, the included angle between the rear edge surface of one cutting edge 5 and the front edge surface of the other cutting edge 5 is 55°.

[0031] The angle between the conical surface where the outer edges of the plurality of blades 5 are located and the cylindrical surface where the largest blade 5 is located is 22°. In this embodiment, the outer diameter of the first blade 501 is 345 mm, the outer diameter of the second blade 502 is 355 mm, the outer diameter of the third blade 503 is 385 mm, and the outer diameter of the fourth blade 504 is 432 mm.

[0032] The blade 5 includes a first blade 501, a second blade 502, a third blade 503 and a fourth blade 504 of increasing size; the value range of the angle α between the front edge surface of the first blade 501 and the outer surface of the blade body 4 is: 150°≤α≤130°.

[0033] The included angle α between the front edge surface of the first blade 501 and the outer surface of the blade body 4 is 150°.

[0034] The value range of the angle β between the rear edge surface of the fourth cutting edge 504 and the cylindrical surface where the outer diameter of the fourth cutting edge 504 is located is: 60°≤β≤35°.

[0035] The included angle β between the rear edge surface of the fourth blade 504 and the cylindrical surface where the outer diameter of the fourth blade 504 is located is 60°.

[0036] The tool box 14 of the utility model is fixed on the oil cylinder seat 12 in the cutter disc 10, the cutter seat 11 is welded in the tool box 14, and the profiling tool locks the locking member 13 by bolts to fix the tool on the cutter seat 11. During excavation, the oil cylinder 3 controls the extension and retraction of the tool. When the extension of the super excavation tool forms a linkage with the rotation of the cutter disc 10, the excavation trajectory can be determined, which is the meaning of profiling.

[0037] The shield machine moves forward, and the cutterhead rotates. The working surface formed by the traces of the cutter rolling over is the face of the tunnel. The shield machine moves forward, and the cutterhead rotates. The tunnel diameter wall formed by the over-digging of the upper edge of the cutterhead as the cutterhead rotates is the expansion face. The face of the tunnel is the working surface formed when all the cutters are excavating. The expansion face is to change the tunnel diameter by adjusting the cutter size or the cutter height. When the shield machine needs to adjust the angle during excavation, it is necessary to expand the tunnel diameter to meet the space required when the shield machine turns. The shield machine profiling cutter of the utility model is locked and fixed on the cutter seat 11, and the cutter seat 11 is connected to the retractable cylinder 3 by bolts. The over-digging amount of the profiling cutter is hydraulically adjusted to form the expansion face. The profiling cutter blade 5 partially imitates the contour of the arc starting area 1001 of the shield machine cutterhead 10, so that the shield machine expansion is smoother. The profiling cutter is installed in the arcing area 1001 of the cutter head 10 in the form of a hob. The more blades 5 there are in the arcing area 1001 of the cutter head 10, the gentler the arc. Since the space of the cutter head 10 is limited, the blades 5 are designed on the same cutter body 4, and this profile cutter is designed in the form of a hob, which can greatly reduce the torque of the cutter head 10. At the same time, according to the over-excavation range, the profiling cutter is extended and retracted to achieve the purpose of profiling. When the shield expansion machine is advancing, turning or correcting the curve section, the profiling cutter of the multi-blade hob ensures that the shield machine can achieve curve advancement, smooth turning and correction under the condition of little interference to the surrounding soil.

Claims

1. A shield machine profiling cutter, characterized in that: include: A knife body (4), wherein the knife body (4) is a conical cylindrical structure; A plurality of annular blades (5) formed integrally with the blade body (4) and coaxially arranged on the outer surface of the blade body (4), the outer edges of the plurality of blades (5) being located on the same conical surface, and the small-sized end of the conical surface where the outer edges of the plurality of blades (5) are located is located at the same end as the small-sized end of the blade body (4); A knife shaft (6) coaxially arranged with the knife body (4); A bearing (7) disposed between the cutter shaft (6) and the inner control surface of the cutter body (4); and end covers (8) buckled on both ends of the knife body (4); a floating oil seal (9) is provided at the junction of the end cover (8) and the knife body (4); and the knife shaft (6) passes through the end covers (8) at both ends.

2. A shield machine profiling cutter according to claim 1, characterized in that: Of the two adjacent blades (5), the included angle between the rear edge surface of one blade (5) and the front edge surface of the other blade (5) is 55°.

3. The shield machine profiling cutter according to claim 1, characterized in that: The angle between the conical surface where the outer edges of the plurality of blades (5) are located and the cylindrical surface where the largest blade (5) is located is 22°.

4. A shield machine profiling cutter according to claim 1, 2 or 3, characterized in that: The blade (5) comprises a first blade (501), a second blade (502), a third blade (503) and a fourth blade (504) of increasing sizes; the value range of the angle α between the front blade surface of the first blade (501) and the outer surface of the blade body (4) is: 150°≤α≤130°.

5. A shield machine profiling cutter according to claim 4, characterized in that: The included angle α between the front edge surface of the first blade (501) and the outer surface of the blade body (4) is 150°.

6. The shield machine profiling cutter according to claim 4, characterized in that: The value range of the angle β between the rear edge surface of the fourth blade (504) and the cylindrical surface where the outer diameter of the fourth blade (504) is located is: 60°≤β≤35°.

7. A shield machine profiling cutter according to claim 6, characterized in that: The included angle β between the rear edge surface of the fourth blade (504) and the cylindrical surface where the outer diameter of the fourth blade (504) is located is 60°.

Images