A cutter used in a slurry shield machine

Abstract

The present invention discloses a tool for use in a slurry shield machine, comprising a cutterhead body, shafts, wear-resistant strips, a center cutter, a roller cutter, a fan-shaped opening, a cutter, an arc cutter, a circular soil inlet, a cutting disc, a fishtail cutter, a profile cutter, a center cutterhead, a scraper, a connecting mechanism, and a main bearing. The present invention has the following beneficial effects: six shafts are evenly arranged radially from the center of the cutterhead body toward the edge, facilitating the division of the cutterhead body into multiple areas; six groups of roller cutters and arc cutters are provided, ensuring the stability of the excavation process; the center cutter is made of hard diamond and is significantly higher than the cutterhead body panel, facilitating the formation of a pilot drill hole; the fishtail cutter, profile cutter, and scraper are all connected to the cutterhead body by fastening bolts, facilitating subsequent disassembly and maintenance, and being relatively convenient to operate; a cutter ring is provided on the outside of the roller cutter, facilitating the operator to determine whether to replace the tool by measuring the wear of the roller cutter ring.

Description

Technical Field

[0001] The invention relates to a cutter, in particular to a cutter used in a slurry shield machine, belonging to the technical field of tunnel construction. Background Art

[0002] In tunnel construction, shield technology is gaining increasing popularity due to its advantages, including high automation, high safety, rapid construction progress, minimal pollution, and low cost. Slurry shield machines are primarily suitable for geological conditions with high groundwater pressure and high soil permeability, and are widely used in the construction of subway tunnels, such as those crossing rivers and seas. When a slurry shield machine traverses long distances through sandy layers, the quartz in the strata can exacerbate wear on the shield machine's cutting tools, necessitating maintenance or replacement. However, the existing slurry shield cutterheads are difficult to remove, making replacement a complex task. Summary of the Invention

[0003] The purpose of the present invention is to provide a cutter for use in a slurry shield machine in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical scheme: a tool used in a slurry shield machine, comprising a cutter disc body, an axis bar, a wear-resistant strip, a center knife, a hob, a fan-shaped opening, a cutter, an arc knife, a circular soil inlet, a cutting disc, a fishtail knife, a contour knife, a center cutter disc, a scraper, a connecting mechanism and a main bearing; the cutter disc body, the axis bar and the wear-resistant strip constitute the main structure of the tool, the disc surface of the cutter disc body is provided with six axis bars, the six axis bars are provided at the front of the cutter disc body, and the surface of each axis bar is fixed with a cutter, the outer edge of the cutter disc body is fixedly installed with a wear-resistant strip, and the center cutter disc is fixedly installed at the center of the disc body of the cutter disc body, A center knife is fixedly connected to the center cutter disc, and the six shafts divide the cutter disc body into six areas, and each area is provided with a cutting disc in the shape of an inverted figure eight. A fishtail knife and a profiling knife are fixedly installed on the side walls of both sides of the cutting disc, and a circular soil inlet is fixedly opened between the fishtail knife and the profiling knife. A fan-shaped opening is fixedly provided on the side of the cutting disc away from the center cutter disc, and an arc-shaped knife is fixedly installed on one side of the fan-shaped opening. Scrapers are fixedly connected to both sides of the arc-shaped knife by bolts, and a roller is fixedly installed on one side of the scraper. A connecting mechanism is symmetrically fixedly installed on the back of the cutter disc body, and a main bearing is provided on the cutter disc body on the opposite side of the center cutter disc.

[0005] Preferably, in order to facilitate the division of the cutter disc body into multiple areas and thus ensure cutting efficiency, the six shafts are evenly arranged radially from the center of the cutter disc body to the edge.

[0006] Preferably, in order to facilitate the formation of a pilot borehole to release the formation pressure at the center of the working face and prevent the clay from adhering to the cutterhead body, the center cutter is made of hard diamond and is much higher than the cutterhead body panel.

[0007] Preferably, in order to facilitate later disassembly and maintenance and to make the operation more convenient, the fishtail knife, the contour knife and the scraper are all connected to the cutter disc body by fastening bolts.

[0008] Preferably, in order to facilitate the operator to determine whether to replace the tool by measuring the wear of the hob cutter ring, a cutter ring is provided on the outer side of the hob.

[0009] Preferably, in order to ensure that the area to be excavated is subjected to the same excavation force during the excavation process, thereby ensuring the stability of the excavation process, six groups of roller cutters and arc cutters are provided, and are evenly distributed in the six areas formed by the six shafts.

[0010] The beneficial effects of the present invention are as follows: the cutter used in the slurry shield machine is reasonably designed, and the six shafts are evenly arranged radially from the center of the cutter disc body to the edge direction, which is convenient for dividing the cutter disc body into multiple areas, thereby ensuring the cutting efficiency. The roller cutters and arc cutters are each provided with six groups, and are evenly distributed in the six areas formed by the six shafts, which is convenient for ensuring that the area to be excavated is subjected to the same excavation force during the excavation process, thereby ensuring the stability of the excavation process. The center cutter is made of hard diamond, and the center cutter is much higher than the cutter disc body panel, which is convenient for forming a pilot drill hole to release the formation pressure in the center of the working face and prevent clay from sticking to the cutter disc body. The fishtail cutter, contour cutter and scraper are all connected to the cutter disc body by fastening bolts, which is convenient for later disassembly and maintenance, and is relatively convenient to operate. A cutter ring is provided on the outside of the roller cutter, which is convenient for the operator to determine whether to replace the tool by measuring the wear of the roller cutter ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the cutter head of the present invention;

[0012] Figure 2 This is a schematic diagram of the side structure of the cutter head of the present invention;

[0013] Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle.

[0014] In the figure: 1, cutter disc body, 2, shaft, 3, wear-resistant strip, 4, center knife, 5, hob, 6, fan-shaped opening, 7, cutting knife, 8, curved knife, 9, circular soil inlet, 10, cutting disc, 11, fishtail knife, 12, contour knife, 13, center cutter disc, 14, scraper, 15, connecting mechanism and 16, main bearing. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figures 1 to 3 , a tool used in a slurry shield machine, including a cutterhead body 1, a shaft 2, a wear-resistant strip 3, a center knife 4, a hob 5, a fan-shaped opening 6, a cutter 7, an arc knife 8, a circular soil inlet 9, a cutting disc 10, a fishtail knife 11, a profiling knife 12, a center cutter disc 13, a scraper 14, a connecting mechanism 15 and a main bearing 16; the cutterhead body 1, the shaft 2 and the wear-resistant strip 3 constitute the main structure of the tool, the disc surface of the cutterhead body 1 is provided with six shafts 2, the six shafts 2 are arranged at the front of the cutterhead body 1, and the surface of each shaft 2 is fixed with a cutter 7, the outer edge of the cutterhead body 1 is fixedly installed with a wear-resistant strip 3, and the center cutter disc 13 is fixedly installed in the center of the disc body of the cutterhead body 1, and the center cutter disc 13 is fixed on It is connected to a center knife 4, and the six shafts 2 divide the cutter disc body 1 into six equal areas, and each area is provided with a cutting disc 10 in the shape of an inverted figure eight, and a fishtail knife 11 and a profiling knife 12 are fixedly installed on the side walls of both sides of the cutting disc 10, and a circular soil inlet 9 is fixedly opened between the fishtail knife 11 and the profiling knife 12. A fan-shaped opening 6 is fixedly provided on the side of the cutting disc 10 away from the center cutter disc 13, and an arc-shaped knife 8 is fixedly installed on one side of the fan-shaped opening 6. Scrapers 14 are fixedly installed on both sides of the arc-shaped knife 8 by bolts, and a roller 5 is fixedly installed on one side of the scraper 14. A connecting mechanism 15 is symmetrically fixedly installed on the back of the cutter disc body 1, and a main bearing 16 is provided on the cutter disc body 1 on the opposite side of the center cutter disc 13.

[0017] The six shafts 2 are evenly arranged radially from the center of the cutter disc body 1 to the edge, which is convenient for dividing the cutter disc body 1 into multiple areas, thereby ensuring the cutting efficiency. The roller cutters 5 and arc cutters 8 are each provided with six groups, and are evenly distributed in the six areas formed by the six shafts 2, so as to ensure that the area to be excavated is subjected to the same excavation force during the excavation process, thereby ensuring the stability of the excavation process. The center cutter 4 is made of hard diamond, and the center cutter 4 is much higher than the panel of the cutter disc body 1, which is convenient for forming a pilot drill hole to release the formation pressure in the center of the working face and prevent the clay from sticking to the cutter disc body 1. The fishtail cutter 11, the contour cutter 12 and the scraper 14 are all connected to the cutter disc body 1 by fastening bolts, which is convenient for later disassembly and maintenance, and is relatively convenient to operate. A cutter ring is provided on the outside of the roller cutter 5, which is convenient for the operator to determine whether to replace the tool by measuring the wear of the roller cutter ring.

[0018] Working principle: When using this kind of cutter used in slurry shield machine, the electromechanical deputy team leader and technical personnel will first inspect the cutter head body 1 and the cutter according to the inspection items and make records. First, check the appearance of the cutter, and then measure the wear of the cutter. When the cutter reaches the maximum wear limit, it must be replaced. When replacing the cutter, first place the cutter removal tool next to you, and then remove the fastening bolts of the cutter to be replaced, remove the cutter and replace it. When replacing the cutter, generally follow the following order: confirm the tool change number → remove the broken cutter → check the number of broken cutter parts → install the new cutter → tighten the bolts → fix the retaining ring and check the direction → check and count the replacement tool parts → transport the broken cutter and other parts, and all cutters that need to be replaced must be carefully cleaned; when installing the cutter on the cutter head, the installation position on the cutter head should be cleaned in advance.

[0019] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0020] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A cutter used in a slurry shield machine, characterized by: The invention comprises a cutter disc body (1), a shaft (2), a wear-resistant strip (3), a center knife (4), a roller cutter (5), a fan-shaped opening (6), a cutter (7), an arc knife (8), a circular soil inlet (9), a cutting disc (10), a fishtail knife (11), a contour knife (12), a center cutter disc (13), a scraper (14), a connecting mechanism (15) and a main bearing (16); the cutter disc body (1), The shaft strips (2) and the wear-resistant strips (3) constitute the main structure of the tool. The surface of the cutter disc body (1) is provided with six shaft strips (2). The six shaft strips (2) are provided at the front of the cutter disc body (1), and a cutting knife (7) is fixedly connected to the surface of each shaft strip (2). The wear-resistant strips (3) are fixedly installed at the outer edge of the cutter disc body (1), and a central cutter disc (13) is fixedly installed at the center of the cutter disc body (1). A central knife (4) is fixedly connected to the central cutter disc (13). The six shaft strips (2) divide the cutter disc body (1) into six equal areas, and each area is provided with a cutting disc (10) in the shape of an inverted figure eight. The cutting disc (10) A fishtail knife (11) and a profiling knife (12) are fixedly mounted on both side walls, respectively; a circular soil inlet (9) is fixedly opened between the fishtail knife (11) and the profiling knife (12); a fan-shaped opening (6) is fixedly mounted on one side of the cutting disc (10) away from the central cutter disc (13); an arc-shaped knife (8) is fixedly mounted on one side of the fan-shaped opening (6); scrapers (14) are fixedly mounted on both sides of the arc-shaped knife (8) by bolts; a roller (5) is fixedly mounted on one side of the scraper (14); a connecting mechanism (15) is symmetrically fixedly mounted on the back side of the cutter disc body (1); and a main bearing (16) is provided on the cutter disc body (1) on the side opposite to the central cutter disc (13); The six shafts (2) are evenly arranged radially from the center of the cutter head body (1) toward the edge; six groups of the rollers (5) and the arc cutters (8) are evenly distributed in the six areas formed by the six shafts (2).

2. The cutter used in a slurry shield machine according to claim 1, characterized in that: The center knife (4) is made of hard diamond, and the center knife (4) is much higher than the panel of the cutter head body (1).

3. The cutter used in a slurry shield machine according to claim 1, characterized in that: The fishtail knife (11), the contour knife (12) and the scraper (14) are all connected to the cutter head body (1) via fastening bolts.

4. The cutter used in a slurry shield machine according to claim 1, characterized in that: The outer sides of the hobs (5) are each provided with a cutter ring.

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