CN111173532A

CN111173532A - Composite cutter head suitable for construction in complex hard soil layer

Info

Publication number: CN111173532A
Application number: CN201911392465.5A
Authority: CN
Inventors: 孙海明; 郑建平; 李鹏飞; 田新伟
Original assignee: Shanghai Foundation Engineering Group Co Ltd
Current assignee: Shanghai Foundation Engineering Group Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-19

Abstract

The invention relates to a composite cutter head suitable for construction in a complex hard soil layer, which comprises a shell, wherein a central cutter is arranged at the center of a disc surface of the shell, peripheral cutters are uniformly distributed on the periphery of the disc surface, shell cutters are uniformly distributed on the middle part of the disc surface along the circumferential direction, cutter groups with different lengths are uniformly distributed on the disc surface between the peripheral cutters and the central cutter along the circumferential direction, each cutter group consists of symmetrically arranged cutters, and a hob is arranged between the two symmetrically arranged cutters. The composite cutter head can be used in the condition that the jacking pipe has complex soil jacking condition and sand, clay, pebbles, gravels and boulders exist at the same time, and becomes the composite cutter head meeting the requirement of all-soil jacking.

Description

Composite cutter head suitable for construction in complex hard soil layer

Technical Field

The invention relates to a push bench, in particular to a composite cutter head of a push bench.

Background

With social progress and urbanization development, people have higher and higher requirements on the environment. The demand of underground pipelines in China is also increasing year by year. The pipe jacking construction technology is more and more popular, and the pipe jacking construction technology is adopted not only in developed large and medium cities along the sea, but also in inland cities.

The project of the plain section of the south line of the second water source water delivery channel project in Hangzhou city is characterized in that the starting point is positioned at the exit of a tunnel of a flower mountain in the mountain section, the terminal point is positioned at the river-crossing point of a dragon pond on the north bank beside the Fuchun river, the total length of the route is about 6.42km, and the sections of the jacking pipes are arranged along the route. According to the longitudinal section diagram and the detailed investigation data provided by the design, the soil layers mainly related to the pipe jacking are sandy soil layers, gravel soil layers and pebble soil layers, and the general pipe jacking machine cutterhead cannot meet the jacking construction in the soil layers. Therefore, there is a need for a wide-range and all-soil push bench with adaptability, which is a necessary trend. Therefore, the cutter head of the push bench needs to meet the requirement of the soil property at first.

Disclosure of Invention

The invention aims to provide a composite cutter head suitable for construction in a complex hard soil layer, wherein the composite cutter head is a push bench composite cutter head capable of being pushed into soft soil and silt, can be used in pebbles, gravels and boulders, and can be pushed into all soil.

In order to achieve the purpose, the technical scheme of the invention is as follows: a composite cutter head suitable for construction in a complex hard soil layer is provided with a shell, a central cutter is installed in the center of the disk surface of the shell, peripheral cutters are evenly distributed on the periphery of the disk surface, shell cutters are evenly distributed on the middle of the disk surface along the circumferential direction, cutting cutter sets with different lengths are evenly distributed on the disk surface between the peripheral cutters and the central cutter along the circumferential direction, each cutting cutter set comprises symmetrically arranged cutting cutters, and a hob is arranged between the two symmetrically arranged cutting cutters.

Furthermore, the front and the side surfaces of the hob, the peripheral cutter, the shell cutter and the cutting cutter are all made of super-hard alloy cutters.

Furthermore, the hob, the peripheral knife, the shell knife and the cutting knife are welded and fixed with the disk surface of the shell through the knife holder.

Further, the tool apron and the disc surface of the shell are welded by adopting a wear-resistant welding rod.

The invention has the beneficial effects that: the composite cutter head is provided with the hobbing cutter on the disc surface, and is simultaneously provided with the central cutter, the shell cutters, the peripheral cutters and the cutting cutters, so that the overall wear resistance of the cutter head is enhanced, the full-section effective cutting can be carried out, the silty clay and the pebbles or the mixture thereof are crushed into proper particles, and then the particles are conveyed to the ground through the mud discharge pipeline. The invention can be used in pebbles, gravels and boulders, and becomes a composite cutter head meeting the requirement of all-soil jacking.

Drawings

Fig. 1 is a schematic structural view of a composite cutter head suitable for construction in a complex hard soil layer;

fig. 2 is a schematic diagram of the composite cutter head cutting path of the present invention.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1 and 2, the composite cutter head suitable for construction in complex hard soil layers comprises a shell 1, a hob 2, a peripheral knife 4, a shell knife 5 and a cutting knife 6. The center of the disk surface of the shell 1 is provided with a central cutter 3, peripheral cutters 4 are uniformly distributed on the periphery of the disk surface, shell cutters 5 are uniformly distributed on the middle of the disk surface along the circumferential direction, cutting cutter groups with different lengths are uniformly distributed on the disk surface between the peripheral cutters 4 and the central cutter 3 along the circumferential direction, each cutting cutter group consists of symmetrically arranged cutting cutters 6, and a hob 2 is arranged between the two symmetrically arranged cutting cutters 6. The outer end of the cutting knife 6 is provided with an opening 7.

The composite cutter head of the invention is characterized in that a hob is arranged on the disk surface, and a central knife, a shell knife, a peripheral knife and a cutting knife are arranged at the same time, so that the integral wear resistance of the cutter head is enhanced, the full-section effective cutting can be carried out, and the silty clay and pebble or a mixture thereof are crushed into proper particles and then conveyed to the ground through a mud discharge pipeline.

The main functions of the composite cutter head include an excavation function, a stabilization function and a crushing function.

firstly, an excavation function, namely excavating the soil layer of the excavation surface, and smoothly passing the excavated dregs through a dreg groove and into a muddy water bin;

secondly, the function of stabilizing is to support the excavation surface and has the function of stabilizing the excavation surface;

and thirdly, the crushing function is to crush the soil body on the excavated surface by reasonably arranging the cutter position.

The cutter of the all-soil composite cutter head is greatly abraded in pebbles and gravels, and the front and the side surfaces of a cutter head are both made of super-hard alloy cutters. The full jacking is ensured to be completed, and the complex operation of the panel in midway during tool changing is avoided to the greatest extent. All tool holders and tool pans are welded by wear-resistant welding rods.

Claims

1. The utility model provides a be fit for compound blade disc of construction in complicated hardpan, has a casing, its characterized in that: the center of the disk surface of the shell is provided with a central cutter, peripheral cutters are uniformly distributed on the periphery of the disk surface, shell cutters are uniformly distributed on the middle of the disk surface along the circumferential direction, cutting cutter groups with different lengths are uniformly distributed on the disk surface between the peripheral cutters and the central cutter along the circumferential direction, each cutting cutter group consists of symmetrically arranged cutting cutters, and a hob is arranged between the two symmetrically arranged cutting cutters.

2. The composite cutter head suitable for construction in complex hardpan according to claim 1, characterized in that: the front and the side surfaces of the hob, the peripheral knife, the shell knife and the cutting knife are all made of super-hard alloy tools.

3. The composite cutter head suitable for construction in complex hardpan according to claim 1, characterized in that: the hob, the peripheral knife, the shell knife and the cutting knife are welded and fixed with the disc surface of the shell through the knife holder.

4. A composite cutter head suitable for construction in complex hardpan according to claim 3, characterized in that: the tool apron and the disc surface of the shell are welded by adopting a wear-resistant welding rod.