Six-beam cutterhead center hob installation structure and six-beam cutterhead

Abstract

The present invention relates to the technical field of tunnel-specific engineering equipment, and specifically to a six-main-beam cutterhead center hob installation structure, comprising a cutterhead, wherein a center hob group is provided at the center of the front end face of the cutterhead, wherein the center hob group comprises a first hob module, a second hob module, a third hob module and a fourth hob module, wherein the four hob modules are in a cross-shaped configuration, wherein the hob axis of the fourth hob module is deflected to one side by an angle θ to provide a layout space for the front hob group, thereby increasing the number of front hobs to be arranged, and the hob size of the front hob group is larger than the hob size of the center hob group. A six-main-beam cutterhead, comprising the aforementioned six-main-beam cutterhead center hob installation structure. The present invention can increase the number of front hobs to be arranged, and since the size of the front hob is larger, the bearing capacity and rock breaking capacity are stronger, the rock breaking capacity and bearing capacity of the center area of ​​the cutterhead are enhanced, thereby improving the excavation efficiency and excavation capacity of the cutterhead.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel special engineering equipment, and in particular to a six-main-beam cutter head central hob installation structure and a six-main-beam cutter head. Background Art

[0002] In the field of underground engineering, the application of shield construction is becoming more and more widespread, especially in the construction of subway tunnels, where the advantages of shield construction are particularly significant. The cutterhead is one of the key components of the shield machine, and it directly undertakes the task of excavating the face. High-strength hard rock formations are difficult to excavate. When the cutterhead is excavating this formation, the following problems are prone to occur: First, the cutter of the shield cutterhead is severely worn, prone to abnormal damage, and even the phenomenon of cutting off the cutter, so the cutter replacement frequency is relatively high; second, the rock breaking ability of the shield cutterhead is poor, the force on the cutterhead structure is large, and cracks and other defects are prone to occur; third, the cutter layout strength is low, resulting in a small bearing capacity of the shield cutterhead and low excavation efficiency.

[0003] In view of the problems of severe tool wear, difficulty in replacement, low rock breaking ability and small bearing capacity of the existing six-main-beam cutterhead, it is urgent to design a new cutterhead to solve the above-mentioned technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a six-main-beam cutter disc central cutter installation structure and a six-main-beam cutter disc in view of the above-mentioned problems and shortcomings. By arranging the fourth cutter module in the central cutter group at an angle with the cutter disc axis, more space is left in a corner of the cross-shaped central cutter group for placing the front cutters, thereby increasing the number of front cutters arranged at this angle. Since the front cutters are larger in size and have stronger load-bearing and rock-breaking capabilities, the rock-breaking and load-bearing capabilities of the central area of ​​the cutter disc are enhanced, thereby improving the excavation efficiency and excavation capability of the cutter disc.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution of the present invention is:

[0006] A six-main-beam cutter disc center hob installation structure comprises a cutter disc, wherein a center hob group is arranged at the center of the front end surface of the cutter disc, wherein the center hob group comprises a first hob module, a second hob module, a third hob module and a fourth hob module, wherein the four hob modules are in a cross-shaped configuration, wherein the hob axis of the fourth hob module is arranged at an angle to the cutter disc axis, so as to provide arrangement space for the front hob group and increase the number of arranged front hobs, and the hob size of the center hob group is smaller than the hob size of the front hob group.

[0007] Furthermore, in the above-mentioned six-main-beam cutter head central hob installation structure, the angle between the hob axis of the fourth cutter module and the cutter head axis is set to 2°-4°.

[0008] Furthermore, in the above-mentioned six-main-beam cutter disc central hob installation structure, six front hob groups are provided on the cutter disc, and the six front hob groups are arranged at equal angles in a divergent shape along the radial direction of the cutter disc. The hob axis of the fourth hob module in the central hob group is deflected to the right by an angle θ relative to the cutter disc axis, so that the front hob group located on the lower left side of the central hob group is arranged with one more front hob relative to other front hob groups.

[0009] Furthermore, in the above-mentioned six-main-beam cutter disc center hob installation structure, the cutter shaft seat of the center cutter group is pressed onto the cutter box by a first wedge block, and the radial side of the cutter shaft seat of the center cutter group is provided with a second inclined surface matching the first inclined surface of the first wedge block, and the first wedge block is connected to the cutter box by a first tightening bolt; the axial side of the cutter seat of the center cutter group is clamped in the cutter box by a second wedge block, and the inclined surface of the second wedge block is pressed on the inclined surface inside the cutter box, and the second wedge block is connected to the cutter box by a second tightening bolt, and the cutter box is fixedly connected to the cutter disc body.

[0010] Furthermore, in the above-mentioned six-main-beam cutter disc center hob installation structure, the inner side of the tool box is connected to a third wedge block that cooperates with the second wedge block through fasteners, and the inclined surface of the second wedge block is pressed on the inclined surface of the third wedge block.

[0011] Furthermore, in the above-mentioned six-main-beam cutter disc center hob installation structure, the hob module of the center hob group is a double-linked hob module, and the front hob group includes a plurality of front single-edged hobs.

[0012] A six-main-beam cutter disc, comprising the six-main-beam cutter disc central cutter mounting structure as described in any of the preceding items, the cutter disc also being provided with an arc-shaped area cutter group, a scraper group, an edge scraper group, a tearing cutter group and a large circular ring protection cutter group, the arc-shaped area cutter group being arranged at the edge of the cutter disc between adjacent front cutter groups, the scraper group being arranged on both sides of each front cutter group, the edge scraper group being arranged between adjacent arc-shaped area cutter groups, the tearing cutter group being distributed at the outer end of the front cutter group and between two adjacent front cutter groups, and the large circular ring protection cutter group being arranged on the cutter disc main structural member at the side of the cutter disc.

[0013] Furthermore, in the above-mentioned six-main-beam cutter disc, the large circular ring protection knife group includes a front ring protection knife group, a middle ring protection knife group and a rear ring protection knife group which are arranged in sequence from front to back on the main structural member of the cutter disc, and the front ring protection knife group, the middle ring protection knife group and the rear ring protection knife group each include a plurality of protection knives, and gaps are left between each protection knife.

[0014] Furthermore, in the above-mentioned six-main-beam cutter disc, the scrapers in the scraper group and the side scrapers in the side scraper group are connected to the cutter disc by fasteners, the scraper side cutter disc is welded with a scraper protection block, and the side scraper side cutter disc is welded with a side scraper protection block.

[0015] Furthermore, in the above-mentioned six-main-beam cutter disc, the tearing knives in the tearing knife group are welded to the cutter disc.

[0016] Beneficial effects of the six-main-beam cutter disc center hob installation structure and the six-main-beam cutter disc of the present invention:

[0017] The present invention breaks the conventional idea of ​​setting the center cutter horizontally and vertically. By arranging the fourth cutter module in the center cutter group at an angle with the axis of the cutter disc, more space is left in one corner of the cross-shaped center cutter group for placing the front cutters, which can increase the number of front cutters arranged at this angle. Since the front cutters are larger in size, have stronger bearing capacity and rock breaking capacity, and are less difficult to replace, the rock breaking capacity and bearing capacity of the center area of ​​the cutter disc are enhanced, thereby improving the excavation efficiency and excavation capacity of the cutter disc.

[0018] The center double cutting unit adopts axial wedge-tightening cutting installation method, which is reliable and solves the problem of cutting cutters falling off in the center area. The front cutting unit and arc area cutting unit adopt C-type positioning cutting installation method, which is convenient for cutting cutters to be replaced.

[0019] The six-main-beam cutterhead of the present invention arranges the fourth cutter module in the center cutter group at an angle to the cutterhead axis, thereby increasing the number of cutters arranged in the front direction of the angle, thereby enhancing the rock breaking ability and bearing capacity of the center area of ​​the cutterhead, and further improving the excavation efficiency and excavation capacity of the cutterhead. The tearing cutter group can assist the cutter in breaking rocks, further enhancing the rock breaking ability of the cutterhead. The scraper group and the side scraper group can timely scrape off the broken hard rock layer, thereby improving the excavation efficiency of the cutterhead. The large circular ring protection cutter group is provided to improve the wear resistance of the large circular ring, thereby enhancing the service capacity of the main structural parts of the cutterhead in high-strength hard rock environments. Therefore, it can be used for excavation in high-strength hard rock formations, and the center cutter is not easy to fall off, and the single-edged cutter is easy to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional structure diagram of a six-main-beam cutterhead according to an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the main structure of a six-main-beam cutter head according to an embodiment of the present invention.

[0022] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part A.

[0023] Figure 4 Schematic diagram of the installation structure of the double hob according to an embodiment of the present invention.

[0024] Figure 5 yes Figure 4 Schematic diagram of the BB cross-sectional structure.

[0025] Figure 6 Schematic diagram of the installation structure of a single-edged hob according to an embodiment of the present invention.

[0026] Figure 7 yes Figure 6 Schematic diagram of the C-direction structure.

[0027] Figure 8 Schematic diagram of the welding structure of the tearing knife according to an embodiment of the present invention.

[0028] Fig. 9 Schematic diagram of the installation structure of the side scraper according to an embodiment of the present invention.

[0029] Fig.10 yes Fig. 9 Schematic diagram of DD cross-sectional structure.

[0030] Fig.11 It is a schematic diagram of the welding structure of a large circular ring protection knife group according to an embodiment of the present invention.

[0031] In the figure: 1 is the center double hob group; 1-1 is the first double hob module; 1-1-1 is the double hob; 1-1-2 is the first wedge block; 1-1-3 is the first tension bolt; 1-1-4 is the second wedge block; 1-1-5 is the second tension bolt, 1-1-6 is the third wedge block; 1-2 is the second double hob module; 1-3 is the third double hob module; 1-4 is the fourth double hob module; 2 is the main structure of the cutter head; 3 is the positive The surface hob group; 3-1 is the single-edged hob; 3-2 is the C-block; 3-3 is the third tensioning bolt; 3-4 is the fourth wedge block; 4 is the arc area hob group; 5 is the scraper group; 5-1 is the scraper; 5-2 is the scraper protection block; 6 is the tearing knife; 7 is the side scraper group, 7-1 is the side scraper; 7-2 is the side scraper protection block; 8 is the large circle ring protection knife group; 8-1 is the front ring protection knife group; 8-2 is the middle ring protection knife group; 8-3 is the rear ring protection knife group. DETAILED DESCRIPTION

[0032] The following is a more detailed description of a six-main-beam cutter disc center hob installation structure and a six-main-beam cutter disc of the present invention in conjunction with the accompanying drawings and through specific implementation methods.

[0033] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] See also Figure 1-Figure 11 The present embodiment discloses a six-main-beam cutter head center cutter installation structure, including a cutter head, a center cutter group is arranged at the center of the front end face of the cutter head, and the center cutter group includes a first cutter module, a second cutter module, a third cutter module and a fourth cutter module. The four cutter modules are cross-shaped and compact in structure, wherein the cutter axis of the fourth cutter module is arranged at an angle with the axis of the cutter head, so as to provide arrangement space for the front cutter group and increase the number of arranged front cutters. The cutter size of the front cutter group is larger than that of the center cutter group. The present invention breaks the conventional setting thinking of the center cutter being horizontal and vertical. By arranging the fourth cutter module in the center cutter group at an angle with the axis of the cutter head, more space is left in one corner of the cross-shaped center cutter group for placing the front cutter, and the number of arranged front cutters at this angle can be increased. Since the size of the front cutter is larger, the bearing capacity and rock breaking capacity are stronger, and the tool replacement is less difficult, the rock breaking capacity and bearing capacity of the center area of ​​the cutter head are enhanced, thereby improving the excavation efficiency and excavation capacity of the cutter head.

[0035] In this embodiment, preferably, the angle between the axis of the hob of the fourth hob module and the axis of the cutter disc is set to 2°-4°, and the arrangement is reasonable.

[0036] In this embodiment, specifically, six front cutting units are arranged on the cutter disc, and the six front cutting units are arranged radially along the cutter disc in a divergent manner at equal angles. The cutter axis of the fourth cutting unit in the central cutting unit is deflected to the right by an angle θ relative to the cutter disc axis, preferably 2°-4°, so that the front cutting unit located at the lower left side of the central cutting unit is arranged with one more front cutting unit than other front cutting units. The cutting unit module of the central cutting unit is a double cutting unit module, which includes a 17-inch double cutting unit, and the front cutting unit includes a plurality of 19-inch front single-edged cutting units.

[0037] In this embodiment, preferably, the cutter shaft seat of the center cutter unit is pressed against the cutter box by a first wedge block, the radial side of the cutter shaft seat of the center cutter unit is provided with a second inclined surface that matches the first inclined surface of the first wedge block, and the first wedge block is connected to the cutter box by a first tensioning bolt; the axial side of the cutter seat of the center cutter unit is clamped in the cutter box by a second wedge block, the inclined surface of the second wedge block is pressed against the inclined surface inside the cutter box, the second wedge block is connected to the cutter box by a second tensioning bolt, and the cutter box is fixedly connected to the cutter disc body. The center cutter unit adopts an axial wedge-tightening cutter installation method, that is, a double wedge block fixing method is adopted in the radial and axial directions of the center cutter cutter box, so that the force on the cutter will not be directly applied to the bolt, thereby improving the force on the bolt, and the installation method is reliable, which solves the problem of the cutter easily falling off in the center area.

[0038] In this embodiment, preferably, the inner side of the tool box is connected to a third wedge block that cooperates with the second wedge block through a fastener, and a countersunk hole is provided on the inclined surface of the third wedge block, and it is connected to the inner side surface of the tool box through a screw in the countersunk hole, and the bottom surface of the third wedge block cooperates with the step surface on the inner side of the tool box, and there is no need to process the inclined surface on the inner side of the tool box, so that the tool box has better versatility, and the inclined surface of the second wedge block is pressed on the inclined surface of the third wedge block.

[0039] The present embodiment also discloses a six-main-beam cutterhead, including the six-main-beam cutterhead central cutter installation structure described above, which can increase the number of front cutters arranged at this angle, enhance the rock breaking ability and bearing capacity of the central area of ​​the cutterhead, and thus improve the excavation efficiency and excavation capacity of the cutterhead; the cutterhead is also provided with an arc area cutter group, a scraper group, an edge scraper group, a tearing cutter group and a large circular ring protection cutter group, the arc area cutter group is arranged at the edge of the cutterhead between adjacent front cutter groups, the scraper group is arranged on both sides of each front cutter group, the side scraper group is arranged between adjacent arc area cutter groups, the tearing cutter group is distributed at the outer end of the front cutter group and between two adjacent front cutter groups, and the large circular ring protection cutter group is arranged on the cutterhead main structural member on the side of the cutterhead. The tearing cutter group can assist the cutter in breaking rocks, further enhancing the rock breaking ability of the cutter head. The scraper group and the side scraper group can timely scrape off the broken hard rock layer, improving the excavation efficiency of the cutter head. The large circular ring protection cutter group improves the wear resistance of the large circular ring, and enhances the service ability of the main structural parts of the cutter head in high-strength hard rock environments. In addition, the single-edged cutters in the front cutter group and the arc area cutter group are connected to the cutter box through the C-block, the fourth wedge block and the third tensioning bolt. The C-block is detachably connected to the cutter box. The cutter shaft of the single-edged cutter is pressed in the C-block by the fourth wedge block. The fourth wedge block is connected to the cutter box through the third tensioning bolt. The front cutter group and the arc area cutter group adopt the C-positioned cutter installation method, which is convenient for cutting.

[0040] In this embodiment, preferably, the large circular ring protection knife group includes a front ring protection knife group, a middle ring protection knife group and a rear ring protection knife group which are arranged in sequence from front to back on the main structure of the knife disc. The front ring protection knife group, the middle ring protection knife group and the rear ring protection knife group each include multiple protection knives, and gaps are left between each protection knife, thereby saving material for the protection knife without reducing the protection function.

[0041] In this embodiment, preferably, the scrapers in the scraper group and the side scrapers in the side scraper group are connected to the blade disc through fasteners, a scraper protection block is welded on the side blade disc of the scraper, and a side scraper protection block is welded on the side blade disc of the side scraper, which can protect the scraper and the side scraper and reduce the impact during the construction process.

[0042] In this embodiment, preferably, the tearing knife in the tearing knife assembly is welded and connected to the knife disc, and the connection is tight.

[0043] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the invention belongs. The use of "first", "second" and similar words in the specification and claims of this application does not indicate any order, quantity or importance, but is only used to distinguish different components. Similarly, the use of "one" or "an" and other similar words does not necessarily indicate a quantitative limitation. "Include" or "comprising" and other similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0044] The exemplary implementation modes of the present invention are described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various combinations of the technical features and structures proposed in the present invention can be made without exceeding the protection scope of the present invention.

Claims

1. A six-main-beam cutterhead center hob installation structure, comprising a cutterhead, characterized in that: A central cutter group is provided at the center of the front end surface of the cutter disc, and the central cutter group includes a first cutter module, a second cutter module, a third cutter module and a fourth cutter module, and the four cutter modules are in a cross-shaped shape. Six front cutter groups are provided on the cutter disc, and the six front cutter groups are arranged radially along the cutter disc in a divergent shape at equal angles. The cutter axis of the fourth cutter module in the central cutter group is deflected to the right by an angle θ relative to the cutter disc axis, and θ is 2°-4°, so that the front cutter group located at the lower left side of the central cutter group is arranged with one more front cutter relative to other front cutter groups, and the cutter size of the front cutter group is larger than the cutter size of the central cutter group; The cutter shaft seat of the center hob cutter group is pressed onto the cutter box by a first wedge block, a second inclined surface matching the first inclined surface of the first wedge block is provided on the radial side of the cutter shaft seat of the center hob cutter group, and the first wedge block is connected to the cutter box by a first tightening bolt; the axial side of the cutter seat of the center hob cutter group is clamped in the cutter box by a second wedge block, the inclined surface of the second wedge block is pressed on the inclined surface inside the cutter box, the second wedge block is connected to the cutter box by a second tightening bolt, and the cutter box is fixedly connected to the cutter disc body.

2. The six-main-beam cutter head center hob installation structure according to claim 1 is characterized in that: The inner side of the tool box is connected with a third wedging block matched with the second wedging block through a fastener, and the inclined surface of the second wedging block is pressed on the inclined surface of the third wedging block.

3. The six-main-beam cutter head center hob installation structure according to claim 1 is characterized in that: The hob module of the central hob cutter assembly is a double hob module, and the front hob cutter assembly includes a plurality of front single-edged hobs.

4. A six-main-beam cutterhead, characterized in that: It includes the six-main-beam cutter disc central hob installation structure as described in any one of claims 1-3, and the cutter disc is also provided with an arc area cutter group, a scraper group, an edge scraper group, a tearing cutter group and a large circular ring protection cutter group, the arc area cutter group is arranged at the edge of the cutter disc between adjacent front cutter groups, the scraper group is arranged on both sides of each front cutter group, the side scraper group is arranged between adjacent arc area cutter groups, the tearing cutter group is distributed at the outer end of the front cutter group and between two adjacent front cutter groups, and the large circular ring protection cutter group is arranged on the cutter disc main structural member on the side of the cutter disc.

5. The six-main-beam cutterhead according to claim 4, characterized in that: The large circular ring protection knife group includes a front ring protection knife group, a middle ring protection knife group and a rear ring protection knife group which are arranged in sequence from front to back on the main structure of the knife disc. The front ring protection knife group, the middle ring protection knife group and the rear ring protection knife group each include a plurality of protection knives, and gaps are left between each protection knife.

6. The six-main-beam cutterhead according to claim 4, characterized in that: The scrapers in the scraper group and the side scrapers in the side scraper group are connected to the cutter disc through fasteners. A scraper protection block is welded to the side cutter disc of the scraper, and a side scraper protection block is welded to the side cutter disc of the side scraper.

7. The six-main-beam cutterhead according to claim 4, characterized in that: The tearing knives in the tearing knife set are welded to the knife disc.

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