CN215595589U

CN215595589U - Hob cutter ring with novel structure

Info

Publication number: CN215595589U
Application number: CN202020851079.XU
Authority: CN
Inventors: 庞玉申; 赵万新; 黄文国; 邵和磊; 权培浩
Original assignee: Shandong Ruizuan Engineering Equipment Co ltd
Current assignee: Shandong Ruizuan Engineering Equipment Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2022-01-21
Anticipated expiration: 2030-05-20

Abstract

The utility model relates to the field of shield hobbing cutters in trenchless construction, in particular to a hobbing cutter ring with a new structure. The peripheral edge part of the cutter ring is in a waveform, a polygonal shape or a parabola shape which is uniformly distributed, wherein the number N of the waveform, the polygonal shape or the parabola shape is more than or equal to 5; at least one of reinforcing ribs, alloy columns or wear-resistant blocks is arranged on the side face of the cutter ring, and the number N of the reinforcing ribs, the alloy columns or the wear-resistant blocks is more than or equal to 5; the outer peripheral edge part and the side surface of the cutter ring are at least provided with one according to a waveform outer peripheral edge part, a multi-prismatic outer peripheral edge part, a parabola outer peripheral edge part, a reinforcing rib, an alloy column or a wear-resistant block. According to the novel hob ring provided by the utility model, the problem that the traditional hob ring is easy to be eccentric and broken is effectively solved by utilizing the special structure of the edge part or the side surface of the hob ring, the service life of the hob ring is prolonged, the times of replacement and maintenance of a hob are reduced, and the cost is saved.

Description

Hob cutter ring with novel structure

Technical Field

The utility model relates to the field of shield hobbing cutters in trenchless construction, in particular to a hobbing cutter ring with a new structure for preventing eccentric wear of a hobbing cutter.

Background

With the development of national economy, the engineering construction demand is continuously increased, and the shield machine is widely applied to tunnel engineering such as subways, municipal pipe networks, hydropower and the like. The hob is a tool for breaking rocks in the tunneling process of the shield tunneling machine, and the cutter ring is a main part of the hob for breaking the rocks. The abrasion loss cost of the hob in the hard rock stratum tunneling already occupies 20% -35% of the construction cost, wherein the abnormal abrasion of the hob also occupies more than 30% of the abrasion of the hob, and most of the abnormal abrasion is eccentric abrasion of a hob ring.

According to research, the hob abrasion mainly comprises rolling abrasion, lateral abrasion and tangential abrasion, and the lateral abrasion is a main factor causing eccentric abrasion of the hob. When the hob encounters a stratum or a boulder with uneven hardness during rock breaking, a certain adhesive force cannot be generated between the hob ring and the rock face, so that the hob rolls, and the hob is eccentric. The hob can not roll, so that the effective rock breaking function is lost, the normal tunneling of the shield is influenced, the tunneling energy consumption is increased, and the service lives of a cutter head and other cutters are shortened.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems of the hob cutter ring in shield tunneling, the utility model provides the hob cutter ring with a novel structure, which is reasonable in design and excellent in structure, effectively solves the problems that the traditional hob cutter ring is easy to be eccentric and broken, prolongs the service life of the hob cutter ring, reduces the replacement and maintenance times of a hob, and saves cost.

In order to achieve the purpose, the utility model adopts the technical scheme that the traditional single round shape is broken through by the structure of the peripheral edge part of the cutter ring, the uniformly distributed structures such as a waveform, a polygonal shape or a parabola and the like are adopted, the number is determined according to the specification and the form of the cutter ring, and the number N is more than or equal to 5. The hob with the cutter ring extrudes the cracked tunnel face under the action of thrust and torque of the cutter head, and cuts a series of grooves in a waveform, multi-prismatic or parabolic shape. Under the working condition, the series of wave-shaped, multi-prismatic or parabolic grooves can generate corresponding lateral force to automatically match the speed of the hob and prevent the cutter ring from being blocked, so that eccentric wear and chord abrasion of the hob ring are effectively reduced.

The side face of the cutter ring is provided with structures such as reinforcing ribs, alloy columns, wear-resistant blocks and the like which are uniformly distributed, the number of the structures is determined according to the specification and the form of the cutter ring, and the number N is more than or equal to 5. A large amount of broken slag and broken stone in the excavation of the hob can generate huge impact load to the side face of the cutter ring due to the rotation of the cutter head. The side face of the cutter ring is uniformly provided with reinforcing ribs, alloy columns, wear-resistant blocks and other structures, so that the load can be effectively utilized, and the rotation of the hob cutter ring is assisted. And the structures such as the reinforcing ribs, the alloy columns, the wear-resistant blocks and the like strengthen the hob ring, improve the wear-resistant performance of the hob ring and greatly reduce the tipping of the hob ring, thereby prolonging the service life of the hob ring.

The peripheral edge parts of the cutter ring adopt structures such as uniformly distributed waves, multi-prisms, parabolas and the like, and the structures such as reinforcing ribs, alloy columns, wear-resistant blocks and the like are uniformly distributed on the side surfaces, so that the cutter ring can be singly configured or combined with each other.

Compared with the prior art, the novel hob ring provided by the utility model has the advantages and positive effects that the problems of eccentric wear and edge breakage of the traditional hob ring are effectively solved by utilizing the special structure of the edge part or the side surface of the hob ring, the service life of the hob ring is prolonged, the times of replacement and maintenance of the hob are reduced, and the cost is saved. This use novel reasonable in design, simple structure, be fit for extensive popularization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a schematic diagram of a conventional structure of a hob ring;

FIG. 2 is a new structure hob ring with a wave-shaped peripheral edge portion according to the embodiment;

FIG. 3 is a view of the embodiment of a hob ring with a new structure, wherein the peripheral edge of the hob ring is polygonal;

FIG. 4 is a new structure hob ring with reinforcing ribs arranged on the side surface of the hob ring according to the embodiment;

FIG. 5 is a new structure hob ring with wear-resistant blocks arranged on the side surface of the hob ring according to the embodiment;

FIG. 6 shows a hob ring with a new structure, in which alloy columns are arranged on the side of the hob ring;

the embodiment of fig. 7 provides a new structure hob ring with a wavy outer edge and reinforcing ribs arranged on the side surface;

the embodiment of fig. 8 provides a new structure hob ring with a polygonal peripheral edge part and a wear-resistant block arranged on the side surface.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "front" and "rear" appearing hereinafter merely indicate the same direction as the upper and lower directions of the attached fig. 1 itself, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

In the embodiment, as shown in fig. 2 and 3, the structure of the peripheral edge part of the hob ring with a new structure provided by the utility model breaks through the traditional single circle as shown in fig. 1, adopts uniformly distributed structures such as a waveform, a polygonal shape or a parabola, and the like, and the number of the structures is determined according to the specification and the form of the hob ring, wherein the number N is more than or equal to 5. The hob with the cutter ring extrudes the cracked tunnel face under the action of thrust and torque of the cutter head, and cuts a series of grooves in a waveform, multi-prismatic or parabolic shape. Under the working condition, the series of wave-shaped, multi-prismatic or parabolic grooves can generate corresponding lateral force to automatically match the speed of the hob and prevent the cutter ring from being blocked, so that eccentric wear and chord abrasion of the hob ring are effectively reduced.

In the embodiment, as shown in fig. 4, 5 and 6, the new hob ring provided by the utility model has the structure that the side surface of the hob ring is provided with uniformly distributed reinforcing ribs, alloy columns, wear-resistant blocks and the like, the number of the structures is determined according to the specification and the form of the hob ring, and the number N is more than or equal to 5. A large amount of broken slag and broken stone in the excavation of the hob can generate huge impact load to the side face of the cutter ring due to the rotation of the cutter head. The side face of the cutter ring is uniformly provided with reinforcing ribs, alloy columns, wear-resistant blocks and other structures, so that the load can be effectively utilized, and the rotation of the hob cutter ring is assisted. And the structures such as the reinforcing ribs, the alloy columns, the wear-resistant blocks and the like strengthen the hob ring, improve the wear-resistant performance of the hob ring and greatly reduce the tipping of the hob ring, thereby prolonging the service life of the hob ring.

In the embodiment, as shown in fig. 7 and 8, the hob ring with a new structure provided by the present invention adopts a structure of uniformly distributed waveform, polygonal shape, parabola, etc. at the peripheral edge of the hob ring, and a structure of uniformly arranging reinforcing ribs, alloy columns, wear-resistant blocks, etc. at the side, and can be configured singly or combined with each other.

According to the novel hob ring provided by the utility model, the problem that the traditional hob ring is easy to be eccentric and broken is effectively solved by utilizing the special structure of the edge part or the side surface of the hob ring, the service life of the hob ring is prolonged, the times of replacement and maintenance of a hob are reduced, and the cost is saved. This use novel reasonable in design, simple structure, be fit for extensive popularization.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. A hob ring with a new structure is characterized in that the peripheral edge part of the hob ring is in a shape of a waveform, a polygon or a parabola which are uniformly distributed, wherein the number N of the waveform, the polygon or the parabola is more than or equal to 5; the side face of the cutter ring is at least provided with one of reinforcing ribs, alloy columns or wear-resistant blocks, and the number N of the reinforcing ribs, the alloy columns or the wear-resistant blocks is more than or equal to 5.

2. The hob ring of the new structure according to claim 1, characterized in that the alloy column material arranged on the side is tungsten carbide alloy, and the shape of the alloy column is cylindrical; the alloy column and the hob ring base body are assembled in a welding or interference fit mode and are uniformly arranged.

3. The hob ring of claim 2, wherein the wear-resistant blocks arranged on the side surface are wear-resistant steel plates or non-wear-resistant steel plates with wear-resistant materials on the upper surface in a surfacing mode, and the wear-resistant blocks and the hob ring base body are assembled through welding and are uniformly arranged.