CN-224214179-U - Double tearing knife for cutting off anchor cable and cutter head of shield machine

CN224214179UCN 224214179 UCN224214179 UCN 224214179UCN-224214179-U

Abstract

The utility model relates to the technical field of tunnel engineering, in particular to a double-tearing cutter for cutting an anchor rope and a cutter head of a shield machine, which are used for cutting the anchor rope only by virtue of the cutter in the tunneling process, so that the ground treatment step of cutting the anchor rope by a rotary digging pile is omitted, the relative heights of the double-tearing cutter, other cutters and the cutter head are configured to be in preferential contact with each other to cut the invasive anchor rope, the residual section of the anchor rope is discharged along with improved dregs after secondary cutting, and the probability of winding the anchor rope around the cutter head is reduced. The technology is applied to the construction of the urban rail transit shield method, effectively solves the difficulty of crossing the long-distance anchor cable section in the construction of the shield method, is not limited by the ground construction condition, improves the construction efficiency, reduces the construction cost, reduces the construction risk and meets the urban rail transit construction requirement.

Inventors

HUANG HUI
LEI ZHENGHUI
LI ZHIXIONG
JIANG ZHENYU
SUN JINGJIE
LI ZHANRONG
HUANG WENHAO
WU JUNYE

Assignees

广州地铁建设管理有限公司
广东华隧建设集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250624

Claims (10)

1. The utility model provides a two sword of tearing for cutting off anchor rope installs in shield constructs the blade disc of machine, includes blade holder and 2 tool bits, 2 tool bit part overlaps, bottom fixed connection the blade holder, the orientation of tool bit is not more than 45 and 2 tool bit's of departure direction opposite of departure shield constructs the angle of machine direction of advance, its characterized in that, the top of tool bit is outwards buckled, and the inboard forms the prismatic face.
2. The double tearing knife for cutting off an anchor cable according to claim 1, wherein the knife head is trapezoid and rectangular in shape through combination of long sides when seen from top to bottom, the width of the outer side face of the knife head is larger than that of the inner side face, the knife head is arched when seen from the side face, and the top of the knife head is arc-shaped.
3. The double tearing knife for cutting off an anchor cable according to claim 1, wherein the distance between the 2 knife heads is 30-50 mm.
4. The double tearing knife for severing an anchor line of claim 1 further comprising a plug secured to both sides of the blade seat for connection to the cutterhead.
5. The double tearing knife for cutting off an anchor cable according to claim 1, wherein the maximum vertical distance from the top of the knife head to the knife disc is 190-230 mm.
6. A double tearing knife for severing an anchor line according to claim 1, wherein the top of the blade is provided with a plurality of parallel arranged wear layers extending longitudinally from the prismatic face on the inside of the blade to the outside of the blade.
7. A shield tunneling machine cutterhead characterized by being provided with the double tearing knife for cutting off anchor cables according to any one of claims 1-6.
8. The shield tunneling machine cutterhead of claim 7, further comprising a scraper and a single-blade hob, wherein a plurality of double-tearing knives are arranged in parallel to form a double-tearing knife set, a plurality of double-tearing knife sets are equiangularly arranged on a plurality of radial lines of the cutterhead, a plurality of the scraper is positioned between and on two sides of the double-tearing knife set, and the single-blade hob is positioned at the edge of the cutterhead.
9. The shield tunneling machine cutterhead of claim 8, wherein the relative heights of the tips of the double tearing knives, the single edge hob and the scraper and the cutterhead decrease sequentially.
10. A shield machine cutterhead according to claim 8, wherein the single-blade hobs face the cutterhead and/or are radially outward of the cutterhead.

Description

Double tearing knife for cutting off anchor cable and cutter head of shield machine Technical Field The utility model relates to the field of tunnel engineering, in particular to a double tearing cutter for cutting an anchor cable and a cutter head of a shield tunneling machine. Background Subway tunnel shield construction often requires traversing the ground layer where the anchor cable clusters are present. The anchor cable has larger toughness, is buried in the soil body and is used for slope stabilization and foundation pit support, and is pre-installed in front of the shield machine and used for fixing surrounding soil bodies, preventing collapse and keeping the stability of an excavated surface. When the shield machine passes through the anchor cable group, the problems that firstly, the cutter head fails to cut off the anchor cable, so that the whole anchor cable and anchor heads are torn off by the cutter head, larger stratum disturbance is caused, the ground subsidence is larger and even collapse occurs, secondly, the cutter can cut off the anchor cable, but the anchor cable winds the cutter head of the shield machine, wears the cutter, even causes the shield machine to be trapped, and influences the construction progress, thirdly, after the anchor cable is wound into a soil cabin, the spiral conveyor is easy to wind, so that the soil cannot be discharged, and the shield cannot be driven. Therefore, the construction problem of the shield crossing the anchor cable group needs to be properly solved. The existing tearing knife is unreasonable in arrangement of cutting face layers of the same track line and the extension amount of cutters of different track lines, the cutting face of a traditional single-knife structure is small (175 mm-65 mm), the anchor cable cannot be cut off in a layered mode, the anchor cable is easy to wind, the anchor cable can walk on a cutter disc panel, finally the cutter disc can be entangled, a soil outlet is blocked, the torque of the shield machine is increased, the dregs of the shield machine cannot be smoothly discharged, the pressure of a soil bin is unbalanced, and the like. The Chinese patent with the application number 2024103478521 firstly uses the rotary digging pile ground cutting technology to preliminarily break the anchor cable, and then uses the double tearing cutters on the cutter head of the shield machine to cut the anchor cable. However, the double tearing knife has defects in appearance, the distance between the two blades is smaller, the anchor cable is still easy to wind, and secondly, when the ground operation condition is limited, the anchor cable cannot be primarily broken by the rotary drilling bit, and the double tearing knife is difficult to process the anchor cable with larger length. Disclosure of utility model The utility model aims to overcome at least one defect of the prior art, and provides the double tearing knife for cutting the anchor cable and the cutter head of the shield machine, so that the shield machine can cut the anchor cable efficiently under the condition of no pretreatment, the anchor cable is prevented from winding the cutter head, and the shield machine can conveniently and safely tunnel in an anchor cable area. The technical scheme includes that the double tearing cutter for cutting off the anchor cable is provided, the double tearing cutter is arranged on a cutter head of a shield machine and comprises a cutter seat and 2 cutter heads, the 2 cutter heads are partially overlapped, the bottom of the cutter head is fixedly connected with the cutter seat, the angle of the cutter heads, which deviates from the advancing direction of the shield machine, is not more than 45 degrees, the deviation directions of the 2 cutter heads are opposite, the tops of the cutter heads are outwards bent, and a prismatic surface is formed on the inner side of the cutter heads. The diamond surface is a chamfer angle between the vertical surface at the inner side of the cutter head and the horizontal plane at the top, and the vertical surface at the inner side of the cutter head and the chamfer angles at the left side and the right side, so that an inclined plane is formed, the diamond surface is provided with a plurality of ribs protruding inwards, the file grinding effect is obviously stronger than that of the existing cutter head with a rectangular section, and the two diamond surfaces are simultaneously stuck to the anchor cable for file grinding, so that the single track trace is changed into the double track trace, the anchor cable which is invaded can be cut off more quickly by omnibearing treatment, and soil disturbance caused by overlong time for pulling the anchor cable is avoided. The design of the outwards bent prismatic surface of the tool bit ensures that the anchor cable is not easy to be clamped in the gap between 2 tool bits, so that the shield tunneling machine safely passes through the anchor cable area, and the construction ri