Multi-peak type shield cutter suitable for stratum with uneven hardness

Abstract

The utility model provides a multi-peak type shield cutter suitable for a stratum with uneven hardness. The cutter comprises a cutter holder and a cutter body, and at least two protruding cutter peaks are arranged on the side, away from the cutter holder, of the cutter body. The two sides of the cutter body are respectively provided with a cutter wing protruding outwards, and the cutter wings are located in the width direction of the cutter body. The length of the tool apron is larger than the overall width of the tool body and the tool wings on the two sides, the width of the tool apron is larger than the thickness of the tool body, and a plurality of fixing bolts are distributed on the tool apron and distributed on the periphery of the tool body. The cutter is provided with the cutter peak and the cutter wing, the height of the cutter peak can be adjusted and configured according to the stratum condition, different levels of cutting depths are achieved, layer-by-layer segmentation of a rock mass is facilitated, the cutter peak can be matched with a rock track left after a hob is used for cutting, and complementation is well formed; the arrangement of the cutter wings is favorable for intersecting with other cutter paths of the panel, the width of the cutter body is increased, and the weight of the cutter head and the number of cutters are reduced under the condition that the aperture ratio is not influenced.

Description

Technical Field

[0001] The utility model belongs to the field of shield cutters, specifically a multi-peak shield cutter suitable for soft and hard uneven strata. Background Art

[0002] Shield cutters are key components of shield machines for tunneling operations. They are responsible for cutting, crushing and removing soil, rocks and other media on the excavation surface to ensure that the shield machine can accurately excavate the tunnel according to the designed path and shape. According to different geological conditions and cutting requirements, shield cutters are usually made of high-hardness, high-wear-resistant alloy materials to adapt to harsh underground construction environments. According to the function and shape of the cutter, it can generally be divided into various types such as hobs, tooth cutters, scrapers, pilot cutters, center cutters, and profiling cutters. They are installed in different positions for coordinated use to give full play to their respective strengths to ensure the best excavation effect and tool life.

[0003] The arrangement of shield cutters is a delicate and highly technical task. The number of cutters, arrangement spacing, angles, etc. should be considered comprehensively based on factors such as cutter head diameter, geological conditions, and excavation speed. The purpose is to ensure that the shield machine can efficiently and evenly cut various strata during excavation, and to protect the main machine structure from damage to the maximum extent, while reducing the axial force, radial force and vibration impact force generated during tunnel excavation, and ensuring the stability and accuracy of excavation. In shield construction, cutter design is an extremely critical and professional field. Its design goal is to develop and manufacture cutters that can efficiently, stably, durable and safely cut soil or rock according to specific geological conditions.

[0004] With the large-scale development of urban underground space, it has gradually extended to ultra-large buried depths, ultra-large sections, and ultra-long distances. There are many types of strata in the excavation section, and the characteristics vary greatly, which further increases the difficulty of shield equipment selection and the configuration of shield cutterhead tools to adapt to the changing strata. At present, the layout of shield machine tools is divided according to strata. Generally, rolling cutters are suitable for hard rock strata, and cutting cutters are suitable for soft soil strata. However, a single stratum cannot be guaranteed in long-distance and large-section tunnels, so a variety of tools need to be coordinated. On this basis, the rock-breaking efficiency of the cutterhead is generally guaranteed by increasing the distance between cutters. However, the opening rate of the shield machine cutterhead is correspondingly reduced when adding cutters, which increases the overall weight of the cutterhead, and also increases the starting torque and operating power consumption of the cutterhead, which seriously increases the construction cost. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a multi-peak shield cutter suitable for soft and hard uneven strata, which can realize layer-by-layer segmentation of the rock mass at different levels of cutting depths, and can better match the rock trajectory remaining after the roller cutter cutting, better form complementarity, and can also overlap the trajectory with other tools in the width direction, which does not affect the opening rate and can also reduce the weight of the cutter disc.

[0006] In order to achieve the above-mentioned technical objectives, the utility model provides a multi-peak shield tool suitable for soft and hard uneven strata, including a tool holder and a tool body, wherein at least two raised tool peaks are provided on the side of the tool body away from the tool holder, and the cutting surfaces of at least two tool peaks form a wavy shape; outwardly protruding tool wings are respectively provided on both sides of the tool body, and the tool wings are located in the width direction of the tool body, and the protruding cutting surfaces are arc-shaped surfaces; the length of the tool holder is greater than the overall width of the tool body and the tool wings on both sides, and the width of the tool holder is greater than the thickness of the tool body, and a plurality of fixing bolts are arranged on the tool holder, and the plurality of fixing bolts are dispersed around the tool body.

[0007] The preferred technical solution of the utility model is as follows: the blade peak is located in the height direction of the blade body, and its height protruding from the blade body is 1 to 2 cm, and the heights of at least two blade peaks are equal or unequal.

[0008] The preferred technical solution of the utility model is as follows: the blade wing protrudes 1 to 2 cm in the width direction of the blade body, and the blade wings on both sides are in arc transition with the blade body bracket.

[0009] The better technical solution of the utility model is as follows: a mounting block for matching and connecting with the tool box on the shield cutter disc is provided at the bottom of the tool holder, the fixing bolt is arranged on the mounting block, a bolt pressure plate is provided at the bottom of the mounting block, and after the tool holder is installed to the shield cutter disc by the fixing bolt, the bolt pressure plate fixes and presses the end of the fixing bolt.

[0010] The preferred technical solution of the utility model is that the wavy cutting surfaces formed by at least two blade peaks are arranged in a consistent manner in the length direction of the blade seat, and the arc-shaped cutting surfaces of the blade wings are arranged in a consistent manner in the width direction of the blade seat.

[0011] The better technical solution of the utility model: the bolt pressure plate includes a horizontal pressure plate and a vertical pressure plate, the horizontal pressure plate is located at the bottom of the mounting block, and is used to tighten the fixing bolts; the vertical pressure plate is vertically connected between the two horizontal pressure plates, and a pressure plate bolt is provided on the vertical pressure plate, and the pressure plate bolt is fixed and locked to the knife seat and the knife body.

[0012] The beneficial effects of the utility model are as follows: (1) The tool of the utility model is provided with multiple peaks, and the peaks are 1-2 cm higher than the blade body, and are adjusted and configured according to the stratum conditions. The soft soil stratum should be close to 2 cm, so as to stir and tear the soil in advance, reduce the difficulty of improving the slag, and prevent the formation of mud cakes; the hard rock stratum should be close to 1 cm, so as to facilitate the previous splitting of the rock mass and reduce the integrity of the slag; in terms of height direction, different levels of cutting depth are conducive to the layer-by-layer segmentation of the rock mass, and can better match the remaining rock trajectory of the roller cutter cutting, so as to form a better complement.

[0013] (2) The utility model is provided with blade wings on both sides of the blade body. The blade wings are 1-2 cm wider than the blade body and have an arc transition. In terms of width direction, the width of the blade body itself is increased, which is conducive to the intersection with other tool trajectories on the panel and reduces the arrangement of tools. It does not affect the opening rate, reduces the weight of the blade disc and the number of tools, and at the same time increases the wear amount of the tool and extends the tool life.

[0014] (3) The utility model forms a multi-level inclined surface on the cutting surface of the blade body through the arrangement of the blade peak and blade wing, and arranges them according to the gradient hardness, which is convenient for rock crushing and beneficial for tool wear protection; its tool trajectory forms a plurality of loops, and the embedding degree is divided into a plurality of levels, which is beneficial for use with other tools.

[0015] (4) The tool holder of the utility model is enlarged and fixed with multiple bolts around a circle to prevent the tool body from twisting due to uneven force and facilitate replacement; the front end of the tool fixing bolt is embedded in the tool holder, and the rear end of the fixing bolt is fixed with a mounting block after re-tightening to prevent loosening; the vertical pressure plate is connected to the tool body with the pressure plate bolt to form an integral structure to ensure that the tool is not disturbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 and Figure 2 It is a stereogram of the utility model at different angles;

[0017] Figure 3 It is a front view of the utility model;

[0018] Figure 4 It is a top view of the utility model;

[0019] Figure 5 It is a side view of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the knife holder in the utility model;

[0021] Figure 7 It is a schematic diagram of the trajectory line of a single tool of the utility model on the same trajectory plane;

[0022] Figure 8It is an overlapping diagram of different trajectories of multiple tools in the utility model.

[0023] In the figure: 1-blade holder, 2-blade body, 3-blade tip, 4-blade wing, 5-fixing bolt, 6-bolt pressure plate, 600-horizontal pressure plate, 601-vertical pressure plate, 7-pressure plate bolt, 8-mounting block. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Figures 1 to 6 The drawings are all of embodiments, which are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the utility model. The following technical solutions shown in the drawings are specific solutions of the embodiments of the utility model and are not intended to limit the scope of the utility model to be protected. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships that are usually understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0026] The embodiment provides a multi-peak shield tool suitable for uneven hardness and softness formations, such as Figures 1 to 6As shown, it includes a knife seat 1 and a knife body 2. The knife seat 1 is a square structure. The knife body 2 is located in the center of the knife seat 1. The two sides of the knife body 2 are respectively provided with blade wings 4 protruding outward. The length of the knife seat 1 is greater than the width of the knife body 2 and the blade wings 4 on both sides. The width of the knife seat 1 is greater than the thickness of the knife body 2. The four corners of the knife seat 1 are respectively provided with fixing bolts 5, and the four fixing bolts 5 are scattered around the knife body 2. The bottom of the knife seat 1 is provided with a mounting block 8 for matching and connecting with the knife box on the shield cutter disc. The structure of the mounting block 8 matches the structure inside the knife box on the cutter disc, and can be mutually clamped and fixed, and fixedly connected by fixing bolts 5. The fixing bolts 5 are arranged on the mounting block 8 and pass through the mounting block 8 and the knife seat 1. The knife seat 1 and the knife body 2 can be fixedly installed in the knife box by the fixing bolts 5; a bolt pressing plate 6 is provided at the bottom of the mounting block 8, and after the knife seat 1 is installed on the shield cutter disc through the fixing bolts 5, the bolt pressing plate 6 fixes and presses the end of the fixing bolt 5. The bolt pressure plate 6 includes a horizontal pressure plate 600 and a vertical pressure plate 601. The horizontal pressure plate 600 is located at the bottom of the mounting block 8 and is used to tighten the fixing bolt 5. The vertical pressure plate 601 is vertically connected between the two horizontal pressure plates 600. A pressure plate bolt 7 is provided on the vertical pressure plate 601, and the pressure plate bolt 7 is fixed and locked with the knife seat 1 and the knife body 2. The knife seat 1 is enlarged and fixed with multiple bolts around a circle to prevent the knife body from twisting due to uneven force, which is convenient for replacement. The front end of the fixing bolt 5 is embedded in the knife seat 1, and the rear end of the fixing bolt 5 is fixed by the mounting block 8 after re-tightening to prevent loosening. The vertical pressure plate 6 is connected to the knife body 2 through the knife seat 1 using the pressure plate bolt 7 to form an integral structure to ensure that the knife is not disturbed.

[0027] The embodiment provides a multi-peak shield tool suitable for uneven hardness and softness formations, such as Figures 1 to 5 As shown, two raised blade peaks 3 are provided on the side of the blade body 2 away from the blade seat 1. The blade peaks 3 are located in the height direction of the blade body 2, and the height of the blade peaks 3 protruding from the blade body is 1 to 2 cm, and the heights of at least two blade peaks 3 are equal or unequal, and the cut surfaces of the two blade peaks 3 form a wavy shape, and the wavy cut surfaces formed by the two blade peaks 3 are arranged in the same direction as the length of the blade seat 1; the blade wings 4 are located in the width direction of the blade body 2, and the blade wings 4 protrude from the blade body in the width direction by 1 to 2 cm, and the blade wings 4 on both sides are in arc transition with the blade body 2 bracket; the protruding cut surfaces of the blade wings 4 are arc-shaped surfaces, and the arc-shaped cut surfaces of the blade wings 4 are arranged in the same direction as the width of the blade seat 1. By setting up two blade peaks 3 and two blade wings 4, the cut surfaces of the blade body form multi-level inclined surfaces, which are arranged according to the gradient hardness, so as to facilitate the crushing of the rock mass and benefit the wear protection of the tool; the trajectory line of a single multi-peak soft soil tool is as shown in FIG. Figure 7 As shown, 5 loops are formed, and the embedding degree is divided into 5 levels; it is convenient to use with other tools. The tool of the utility model can also be used in combination with multiple tools, and the trajectory lines of multiple tools are as follows Figure 8As shown, some parts overlap, increasing the cutting force.

[0028] The height of the blade tip 3 in the utility model can be adjusted and configured according to the stratum conditions. The height of the blade tip 3 in the soft soil stratum should be close to 2 cm, so as to stir and tear the soil in advance, reduce the difficulty of improving the slag and prevent the formation of mud cakes; the height of the blade tip 3 in the hard rock stratum should be close to 1 cm, so as to facilitate the previous splitting of the rock and reduce the integrity of the slag, so it is generally set to 1 to 2 cm high; the circular arc transition between the blade wing 4 and the blade body is conducive to the intersection with other tool trajectories of the panel, reduce the arrangement of tools, reduce the weight of the cutter disc and the number of tools, and at the same time increase the wear amount of the tool and extend the tool life.

[0029] The above is only one embodiment of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.

Claims

1. A multi-peak shield cutter suitable for soft and hard uneven strata, comprising a cutter seat (1) and a cutter body (2), characterized in that: At least two protruding blade peaks (3) are provided on a side of the blade body (2) away from the blade seat (1), and the cut surfaces of the at least two blade peaks (3) are wavy; blade wings (4) protruding outward are provided on both sides of the blade body (2), respectively, the blade wings (4) are located in the width direction of the blade body (2), and the protruding cut surfaces are arc-shaped surfaces; the length of the blade seat (1) is greater than the overall width of the blade body (2) and the blade wings (4) on both sides, and the width of the blade seat (1) is greater than the thickness of the blade body (2); a plurality of fixing bolts (5) are arranged on the blade seat (1), and the plurality of fixing bolts (5) are dispersed around the blade body (2).

2. The multi-peak shield cutter suitable for soft and hard uneven strata according to claim 1, characterized in that: The blade peak (3) is located in the height direction of the blade body (2), and its height protruding from the blade body is 1 to 2 cm, and the heights of at least two blade peaks (3) are equal or unequal.

3. The multi-peak shield cutter suitable for soft and hard uneven strata according to claim 1, characterized in that: The blade wings (4) protrude 1 to 2 cm in the width direction of the blade body, and the blade wings (4) on both sides transition to the blade body (2) support in an arc shape.

4. The multi-peak shield cutter suitable for soft and hard uneven strata according to claim 1, characterized in that: The knife seat (1) is a square structure, the knife body (2) is located in the center of the knife seat (1), and fixing bolts (5) are respectively provided at the four corners of the knife seat (1); a mounting block (8) for matching and connecting with a knife box on a shield cutter disc is provided at the bottom of the knife seat (1), the fixing bolt (5) is arranged on the mounting block (8), a bolt pressure plate (6) is provided at the bottom of the mounting block (8), and after the knife seat (1) is installed on the shield cutter disc through the fixing bolt (5), the bolt pressure plate (6) fixes and presses the end of the fixing bolt (5).

5. The multi-peak shield cutter suitable for soft and hard uneven strata according to claim 1, characterized in that: The wavy cutting surfaces formed by at least two blade peaks (3) are arranged in a consistent manner in the length direction of the blade seat (1), and the arc-shaped cutting surfaces of the blade wings (4) are arranged in a consistent manner in the width direction of the blade seat (1).

6. The multi-peak shield cutter suitable for soft and hard uneven strata according to claim 4, characterized in that: The bolt pressure plate (6) includes a transverse pressure plate (600) and a vertical pressure plate (601). The transverse pressure plate (600) is located at the bottom of the mounting block (8) and is used to tighten the fixing bolts (5). The vertical pressure plate (601) is vertically connected between the two transverse pressure plates (600). A pressure plate bolt (7) is provided on the vertical pressure plate (601), and the pressure plate bolt (7) is fixed and locked with the knife seat (1) and the knife body (2).

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