CN219034726U - Double-cutter-head normal-pressure tearing cutter - Google Patents

Abstract

The utility model discloses a double-cutter-head normal-pressure tearing cutter, belonging to the technical field of cutters of shield machines; the cutting tool comprises a tool apron, two symmetrically arranged cutting tool bits are arranged on the tool apron, slag discharging grooves are formed between the cutting tool bits at intervals, the cutting tool bits are arranged opposite to the edges of the tool apron, so that the distance between the cutting tool bits on the adjacent tool apron is reduced, and cutting teeth are arranged on the cutting tool bits. According to the utility model, the two cutting tool bits are arranged on one tool apron, so that the distance between the cutting tool bits is shortened, the formation of 'ridges' is restrained, and the tunneling of the cutterhead is promoted.

Description

Double-cutter-head normal-pressure tearing cutter

Technical Field

The utility model relates to the technical field of shield tunneling machine cutters, in particular to a double-cutter-head normal-pressure tearing cutter.

Background

In the process of excavating a large-diameter tunnel, when encountering a soft rock stratum, an ordinary-pressure shield machine is generally adopted, and in order to ensure the stability of a tunnel face during the excavation in soft soil, the cutter head opening rate of the ordinary-pressure shield machine is smaller during the design. As shown in fig. 5, this results in a smaller number of cutting tools being arranged and a larger tool spacing between adjacent tools.

When the shield is used for excavating, soil which is not cut between adjacent cutters forms a very wide 'ridge' and stands in the middle of the cutters, and the ridges standing in the middle of the cutters are extruded and compacted along with the forward tunneling of the cutter, so that mud cakes are formed, and negative influence is brought to the tunneling of the cutter.

Disclosure of Invention

In view of the foregoing, it is necessary to provide a dual-cutter-head normal-pressure tearing cutter for solving the problem of overlarge gap between the conventional normal-pressure tearing cutters.

The utility model provides a double-cutter-head normal-pressure tearing cutter which comprises a cutter holder, wherein two cutting cutter heads are symmetrically arranged on the cutter holder, slag discharging grooves are formed between the cutting cutter heads at intervals, the cutting cutter heads are arranged opposite to the edges of the cutter holder so as to reduce the distance between the cutting cutter heads on the adjacent cutter holder, and cutting teeth are arranged on the cutting cutter heads.

Further, a slot hole for connecting with a cutter head is formed in one side, away from the cutting tool bit, of the tool holder, and the slot hole extends to the inside of the tool holder.

Further, the cross section of the slotted hole is square, and a transition circular arc is arranged at the bending part of the square.

Further, a pin shaft hole penetrating through the slotted hole is formed in one side of the tool apron, and a clamp spring groove is formed in the opening of the pin shaft hole.

Further, the cutting tool bit comprises a tool rest fixedly connected with the tool rest, a first installation part for installing the cutting teeth is formed in the middle of the tool rest in a recessed mode, and a second installation part for installing the cutting teeth is formed between two sides of the tool rest and the tool rest.

Further, the cutting teeth comprise first cutter teeth and second cutter teeth, the first cutter teeth are arranged in the first installation portion and are fixedly connected with the cutter rest, the second cutter teeth are arranged in the second installation portion, and two sides of the second cutter teeth are respectively fixedly connected with the cutter rest and the cutter rest.

Further, the cutting edge of the second cutter tooth is higher than the cutting edge of the first cutter tooth.

Further, the distance between the slag discharging grooves is 60mm, and the second cutter teeth are mutually abutted with the cutter teeth of the adjacent cutter seat.

Furthermore, a build-up welding wear-resistant layer is arranged on the tool apron and the tool rest.

Further, the cutting teeth are hard alloy cutter teeth.

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the double-cutter-head normal-pressure tearing cutter, two cutting cutter heads which are symmetrically arranged are arranged on the cutter base, the slag discharging grooves are formed between the cutting cutter heads at intervals, and the number of the cutting cutter heads is increased on the cutter base with the same width, so that the distance between the cutting cutter heads on the same cutter base is shortened, the slag discharging grooves can promote the discharge of mud cakes, the formation of 'rock ridges' is restrained, and the tunneling of a cutter head is promoted.

(2) According to the double-cutter-head normal-pressure tearing cutter, the cutting cutter heads are arranged opposite to the edges of the cutter seats, the distance between the cutting cutter heads on the adjacent cutter seats is reduced, the distance between the cutting cutter heads on the adjacent cutter seats is far smaller than the width of a slag discharging groove, the formation of a 'rock ridge' between the two cutter seats can be restrained, and the tunneling of a cutter head is promoted.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic cross-sectional view of the whole structure of the present utility model;

FIG. 2 is a schematic top view of the entire structure of the present utility model;

FIG. 3 is a schematic perspective view of the whole structure of the present utility model;

FIG. 4 is a schematic view of the present utility model mounted on a cutterhead;

FIG. 5 is a schematic view of the prior art tool holder and cutting insert mounted on a cutterhead in accordance with the present utility model as a whole;

in the drawing, a holder 100, a slot 110, a pin hole 120, a cutting insert 200, a holder 210, a first mounting portion 211, a second mounting portion 212, cutting teeth 220, first cutter teeth 221, second cutter teeth 222, and a slag discharge groove 300 are shown.

Detailed Description

Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the utility model, and are not intended to limit the scope of the utility model.

The double-cutter-head normal-pressure tearing cutter in the embodiment relates to the technical field of mechanical cutters, and the distance between the cutting cutter heads 200 is shortened by arranging two cutting cutter heads 200 on one cutter seat 100, so that formation of 'rock ridges' is inhibited, and tunneling of a cutter head is promoted.

Referring to fig. 1 to 4, a dual-cutter-head normal-pressure tearing cutter in this embodiment includes a cutter holder 100, two cutting cutter heads 200 symmetrically disposed on the cutter holder 100, a slag discharging groove 300 formed between the cutting cutter heads 200 at intervals, and the number of the cutting cutter heads 200 on the cutter holder 100 with the same width is increased, so that the distance between the cutting cutter heads 200 on the same cutter holder 100 is shortened, the slag discharging groove 300 can promote the discharge of mud cakes, thereby inhibiting the formation of "rock ridges" and promoting the tunneling of the cutter head. The cutting bit 200 is arranged opposite to the edge of the cutter holder 100, the distance between the cutting bit 200 and the cutting bit 200 on the adjacent cutter holder 100 is reduced, the distance between the cutting bit 200 on the adjacent cutter holder 100 is far smaller than the width of the slag discharging groove 300, the formation of 'ridges' between the two cutter holders 100 can be restrained, and the tunneling of the cutterhead is promoted.

Referring to fig. 1 to 3, a slot 110 for connecting with a cutter head is provided on a side of the cutter holder 100 away from the cutting bit 200, the slot 110 extends into the cutter holder 100, an overhanging protruding post is provided on the cutter head, and the protruding post is inserted into the slot 110 to realize the butt joint and installation of the cutter holder 100 and the cutter head. In the concrete implementation process, the cross section of the slot 110 is square, a transition arc is arranged at the bending part of the square, the protruding column is matched with the square slot 110, after the protruding column is inserted into the slot 110, the square slot 110 can prevent the protruding column from rotating, the stable and reliable plugging is ensured, the smooth transition at the bending part can be realized through the arrangement of the transition arc, the stress concentration can be prevented, and the stability and the reliability of the structure are enhanced.

Referring to fig. 1 and 2, as a further embodiment, a pin hole 120 penetrating through the slot hole 110 is formed on one side of the tool holder 100, a protruding column can be fixed in the slot hole 110 by inserting a positioning pin into the pin hole 120, the whole tool holder 100 is prevented from being separated from the protruding column, a clamp spring groove is formed at the opening of the pin hole 120, a clamp spring can be inserted into the clamp spring groove, the clamp spring can fix the positioning pin in the pin hole 120, and the separation of the positioning pin is prevented.

Referring to fig. 3, the cutting bit 200 includes a holder 210 fixedly connected with the holder 100, a first mounting portion 211 for mounting the cutting teeth 220 is formed in a recess in the middle of the holder 210, a second mounting portion 212 for mounting the cutting teeth 220 is formed between both sides of the holder 210 and the holder 100, the cutting teeth 220 are mounted in the first mounting portion 211 and the second mounting portion 212, and the cutting teeth 220 can cut the soil layer by layer. As a further embodiment, the cutting tooth 220 includes a first cutter tooth 221 and a second cutter tooth 222, the first cutter tooth 221 is a flat tooth and has a rectangular cross section, and the first cutter tooth 221 is disposed in the first mounting portion 211 and fixedly connected with the cutter holder 210. The second cutter tooth 222 is a bevel tooth, and has an outwardly protruding tooth edge, the second cutter tooth 222 is disposed in the second mounting portion 212, and two sides of the second cutter tooth 222 are fixedly connected with the tool holder 100 and the tool holder 210, respectively. In the specific implementation process, the cutting edge of the second cutter tooth 222 is higher than that of the first cutter tooth 221, and the second cutter tooth 222 and the first cutter tooth 221 are matched with each other to scrape the soil layer by layer.

Referring to fig. 1, the spacing between the slag discharging grooves 300 is 60mm, and the second cutter teeth 222 are abutted against the cutter teeth of the adjacent cutter holder 100. In fig. 5, the distance between the two cutting teeth 220 is 115mm, and by providing the double cutting tips 200, the distance between the cutting tips 200 is greatly shortened, the formation of "ridges" between the two holders 100 is suppressed, and the driving of the cutterhead is promoted.

The build-up wear-resistant layer is arranged on the tool holder 100 and the tool rest 210, and can improve the wear resistance, heat resistance, corrosion resistance and the like of the tool holder 100 and the tool rest 210, so that the comprehensive performance of the tool holder 100 and the tool rest 210 is greatly improved, and the service lives of the tool holder 100 and the tool rest 210 are prolonged.

The cutting teeth 220 are hard alloy cutter teeth, and the hard alloy cutter teeth have the characteristics of high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, and are enough to be capable of completing cutting tasks and tunneling in soil layers in the face of stratum conditions of different situations.

The working flow is as follows: by means of the slot 110, the tool holder 100 is mounted on the tool pan, when the tool pan drives the tool holder 100 to rotate, two cutting tools 200 on the tool holder 100 simultaneously cut soil layers, and only a small amount of soil blocks can be accumulated in the slag discharging groove 300 between the cutting tools 200 on the same tool holder 100, so that hard 'ridges' are difficult to form. The cutting tips 200 of the adjacent tool holders 100 abut against each other without reserving a gap, and soil layers are difficult to accumulate therein. The two cutting tips 200 cooperate to inhibit "ridge" formation and promote tunneling of the cutterhead.

While the utility model has been described with respect to the preferred embodiments, the scope of the utility model is not limited thereto, and any changes or substitutions that would be apparent to those skilled in the art are intended to be included within the scope of the utility model.

Claims (10)

1. The utility model provides a sword is torn to double knives head ordinary pressure, its characterized in that includes the blade holder, be equipped with two cutting bits that the symmetry set up on the blade holder, the interval sets up between the cutting bit and forms the row slag groove, the cutting bit is relative the edge setting of blade holder is for reduce with adjacent interval between the cutting bit on the blade holder, be equipped with the cutting tooth on the cutting bit.

2. The dual-bit atmospheric pressure tearing knife of claim 1 wherein a slot for connection with a knife head is provided on a side of the knife holder remote from the cutting bit, the slot extending into the interior of the knife holder.

3. The double-cutter-head normal-pressure tearing cutter according to claim 2, wherein the cross section of the slotted hole is square, and a transition circular arc is arranged at the bending part of the square.

4. The double-cutter-head normal-pressure tearing cutter according to claim 3, wherein a pin shaft hole penetrating through the slotted hole is formed in one side of the cutter holder, and a clamp spring groove is formed in an opening of the pin shaft hole.

5. The dual-bit atmospheric pressure tearing knife of claim 1 wherein the cutting bit comprises a knife rest fixedly connected with the knife rest, a first mounting part for mounting the cutting teeth is formed in the middle of the knife rest in a recessed manner, and a second mounting part for mounting the cutting teeth is formed between two sides of the knife rest and the knife rest.

6. The dual-bit atmospheric pressure tearing knife of claim 5 wherein the cutting teeth comprise a first cutter tooth and a second cutter tooth, the first cutter tooth is disposed in the first mounting portion and fixedly connected with the knife rest, the second cutter tooth is disposed in the second mounting portion, and two sides of the second cutter tooth are respectively fixedly connected with the knife rest and the knife rest.

7. The dual bit atmospheric pressure tearing knife of claim 6 wherein the cutting edge of the second cutter tooth is higher than the cutting edge of the first cutter tooth.

8. The double-cutter-head normal-pressure tearing cutter according to claim 7, wherein the distance between the slag discharging grooves is 60mm, and the second cutter teeth are mutually abutted with the cutter teeth of the adjacent cutter seat.

9. The double-cutter-head normal-pressure tearing cutter according to claim 1, wherein a build-up welding wear-resistant layer is arranged on the cutter seat and the cutter rest.

10. The dual bit atmospheric pressure tearing knife of any one of claims 1-9 wherein the cutting teeth are carbide tipped teeth.

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