Cutter head and heading machine

Abstract

The utility model provides a cutterhead and a heading machine. The cutterhead comprises a cutterhead body, a pipeline system and a plurality of cutter assemblies, the cutterhead body comprises a spherical panel, and the pipeline system is arranged on the cutterhead body and is configured to convey an external water source to the cutterhead body and the panel; the cutter assemblies are arranged on the panel and distributed at intervals along the spherical track of the panel, each cutter assembly at least comprises a hob, and the axes of all the hobs are perpendicular to the spherical tangent line of the panel to form spherical arrangement. The device is suitable for a full-face heading machine method and a cantilever type heading machine method, the application range is wide, meanwhile, the number of rock broken by the hob during equipment heading is increased, and the rock breaking efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of tunneling technology, and more particularly to a cutterhead and a tunneling machine. Background Technology

[0002] Currently, rock tunnel excavation mainly employs drill-and-blast, full-face tunneling machine (TBM) methods, and cantilever TBM methods. Drill-and-blast is low-cost, but its construction method severely damages the surrounding rock, resulting in a poor working environment and low construction safety. Full-face TBMs, limited by their structural characteristics, can only cut circular sections, making them less adaptable to rock tunnel excavation. The widely used cantilever TBMs, using cutting tooth cutters, experience increased cutting vibration and wear on the cutting teeth due to the high rock hardness, leading to significantly reduced efficiency and low rock-breaking efficiency in harder rock conditions. Utility Model Content

[0003] The embodiments of this application provide a cutterhead and a tunneling machine that are applicable to both full-face tunneling machine methods and cantilever tunneling machine methods, with a wide range of applications. At the same time, it helps to increase the number of rock cutters breaking during equipment tunneling and improve rock breaking efficiency.

[0004] To achieve the above objectives, a first aspect of the embodiments of this application provides a cutter head, including a cutter head body, a piping system, and a plurality of cutter assemblies;

[0005] The cutter head body includes a spherical panel, and the piping system is disposed on the cutter head body and configured to deliver an external water source to the cutter head body and the panel;

[0006] The cutting tool assembly is disposed on the panel and distributed at intervals along the spherical trajectory of the panel. The cutting tool assembly includes at least a hob, and the axes of all the hobs are perpendicular to the spherical tangent of the panel, forming a spherical arrangement.

[0007] In one possible implementation, the hobbing cutter includes a center hobbing cutter and a front hobbing cutter. The center hobbing cutter is disposed on the central conical plane of the panel, and the front hobbing cutters are distributed at intervals around the outer periphery of the center hobbing cutter along the spherical trajectory of the panel.

[0008] In one possible implementation, the spacing between the center hob is h1, and the spacing between the front hobs is h2.

[0009] In the radial direction from the inside to the outside of the panel, the tool spacing h2 between adjacent front hobs gradually decreases.

[0010] In one possible implementation, adjacent hobs are arranged in a spiral pattern on the panel.

[0011] In one possible implementation, the tool assembly includes a hob, a tool holder, and a locking device, with the tool holder disposed on the panel and the hob disposed on the tool holder via the locking device.

[0012] In one possible implementation, the cutter head body has a cavity inside, and the panel has a panel cavity communicating with the cavity; the pipeline system passes through the cavity and the panel cavity in sequence.

[0013] In one possible implementation, the piping system includes a rotary joint, a pipe channel, and a panel nozzle. The two ends of the rotary joint are respectively connected to an external water source and the pipe channel. The pipe channel passes through the cavity and the panel cavity. The panel nozzle is disposed on the front of the panel and communicates with the panel cavity for spraying fluid.

[0014] In one possible implementation, the spray direction of the panel nozzle forms an angle of 30-60° with the axis of the roller cutter, and at least covers the rock-breaking area between adjacent roller cutters.

[0015] In one possible implementation, the hob includes a single-edged hob, a toothed hob, or a double-edged hob;

[0016] And / or, the front of the panel is provided with a removable access cover that covers the mounting area of ​​the tool assembly;

[0017] And / or, it also includes a flange connection configured to connect the cutter head body and the drive system.

[0018] A second aspect of this application provides a tunneling machine, including a shield and a cutterhead, with the cutterhead disposed at the tunneling end of the shield.

[0019] The cutterhead and tunneling machine provided in this application embodiment, by setting a spherical panel, have the cutter assemblies distributed at intervals along the spherical trajectory of the panel. The curvature of the spherical surface makes the cutter distribution more uniform, covers a wider rock-breaking area, increases the number of roller cutters participating in rock breaking simultaneously when the cutterhead is breaking rock, and improves rock-breaking efficiency. At the same time, this application is applicable to both full-face tunneling machine methods and cantilever tunneling machine methods, with a wide range of applications. By setting up a pipeline system, cooling and dust removal functions are achieved. At the same time, when the cutterhead is working in soft rock formations, the earth pressure is adjusted to reduce the stickiness of the excavated soil, improve the overall working efficiency, reduce cutter consumption, and achieve the effect of low-power and environmentally friendly construction.

[0020] The structure of this application, as well as its other objectives and beneficial effects, will become more apparent from the description of the preferred embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the cutter head and its hob provided in the embodiments of this application;

[0023] Figure 2 A front view of the cutter head provided in an embodiment of this application;

[0024] Figure 3 A schematic diagram showing the distribution of cutting tools in a cutter head provided in an embodiment of this application;

[0025] Figure 4 A schematic diagram of the mounting structure of the hob provided in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the distribution of the pipeline system provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100-Cutterhead;

[0029] 110 - Cutterhead body;

[0030] 120 - Tool assembly; 121 - Hob; 1211 - Center hob; 1212 - Front hob; 122 - Tool holder; 123 - Locking device;

[0031] 130 - Piping system; 131 - Rotary joint; 132 - Piping channel; 133 - Panel nozzle;

[0032] 140 - Flange connection. Detailed Implementation

[0033] In related technologies, rock tunnel excavation mainly employs drill-and-blast, full-face tunneling machine (MTM), and cantilever tunneling machine (MTM) methods. Drill-and-blast is low-cost, but the construction method severely damages the surrounding rock, resulting in a poor working environment and low construction safety. MTMs, limited by their structural characteristics, can only cut circular sections, making them less adaptable to rock tunnel excavation. Currently widely used cantilever tunneling machines, using cutting tooth-type cutters, experience increased cutting vibration and accelerated tooth wear due to the high rock hardness, leading to significantly reduced efficiency and low rock-breaking efficiency in harder rock conditions.

[0034] Based on the aforementioned technical problems, this application provides a cutterhead and a tunneling machine. By setting a spherical panel, the cutter assembly is distributed at intervals along the spherical trajectory of the panel. The curvature of the spherical surface makes the cutter distribution more uniform, covers a wider rock-breaking area, increases the number of roller cutters participating in rock breaking simultaneously when the cutterhead is breaking rock, and improves rock-breaking efficiency. At the same time, this application is applicable to both full-face tunneling machine methods and cantilever tunneling machine methods, with a wide range of applications. By setting up a pipeline system, cooling and dust removal functions are achieved. At the same time, when the cutterhead is working in soft rock formations, the earth pressure is adjusted to reduce the stickiness of the excavated soil, improve the overall working efficiency, reduce cutter consumption, and achieve the effect of low-power and environmentally friendly construction.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] This application provides a tunneling machine, including a shield and a cutterhead. The cutterhead is disposed at the tunneling end of the shield, and the shield is provided with a drive system and configured to drive the cutterhead to rotate.

[0037] Among them, the drive system is the main component that transmits thrust and torque, providing continuous torque to the cutter head and ensuring that the hob cuts into the rock evenly along the designed trajectory, such as a spiral, reducing discontinuous rock breaking or cutter impact damage caused by power fluctuations.

[0038] For example, the drive system can transmit torque and thrust to the cutter head through the flange connector 140, and the cutter head then distributes the force evenly to each cutter assembly to form a synergistic rock-breaking force.

[0039] It should be noted that the cutter head in this embodiment can be a spherical cutter head or a conical cutter head. In this embodiment, a spherical cutter head is mainly used as an example for explanation.

[0040] The cutter head provided in the embodiments of this application will be described in detail below.

[0041] Reference Figure 1 and Figure 2 As shown, the cutter head 100 includes a cutter head body 110, a piping system 130, and a plurality of cutter assemblies 120; the cutter head body 110 includes a spherical panel, and the piping system 130 is disposed on the cutter head body 110 and configured to deliver an external water source to the cutter head body 110 and the panel.

[0042] In this embodiment, the spherical panel allows the cutters to be distributed in spherical regions of different radii, such as the central cone plane and the spherical arc region. Multiple cutters simultaneously contact the rock within the same rotation cycle, which effectively increases the rock-breaking coverage area compared to the traditional planar cutterhead 100 (such as the linear arrangement of a cantilever tunneling machine).

[0043] It should be noted that the panel is the core component of the cutter head body 110. It is the front curved surface structure of the cutter head body 110, and is spherical (or a composite spherical surface that is close to a sphere). It is the mounting carrier of the cutter assembly 120 and the direct medium for transmitting rock-breaking force.

[0044] In this embodiment, the piping system 130 is a multi-functional module integrated inside the cutter head body 110. It connects an external water source to the internal piping of the cutter head 100, allowing continuous water supply while the cutter head 100 rotates. High-pressure water is directly sprayed onto the contact area between the cutter head and the rock, carrying away the heat generated during rock breaking through heat conduction and convection, reducing annealing of the cutter material due to high temperatures. Simultaneously, cooling the cutter head and cutter head body 110 extends the service life of the equipment.

[0045] In addition, in clayey soft rock (such as clay and siltstone), water spraying can reduce the stickiness of the slag and prevent it from adhering to the panel and cutter, reducing the risk of jamming due to high cutter stickiness. This not only has the effect of cooling and dust removal, but also adjusts the soil pressure when the cutterhead 100 is working in soft rock formations, reduces the stickiness of the slag, improves the overall work efficiency, reduces cutter wear, and embodies the concept of low-power and environmentally friendly construction.

[0046] It should be noted that the location of the piping system 130 is not limited. For example, the piping system 130 can be located on the surface of the cutter head body 110, or the piping system 130 can be located inside the cutter head body 110.

[0047] In this embodiment, refer to Figures 1 to 4 As shown, the tool assembly 120 is disposed on the panel and distributed at intervals along the spherical trajectory of the panel. The tool assembly 120 includes at least a hob 121, and the axes of all hobs 121 are perpendicular to the spherical tangent of the panel, forming a spherical arrangement.

[0048] In this embodiment, the tool assembly 120 is front-mounted, which facilitates the disassembly and replacement of the hob 121.

[0049] Among them, reference Figure 1 and Figure 2As shown, the cutter assembly 120 is spaced along the spherical trajectory of the panel, so that when the cutter assembly 120 rotates, the rollers 121 in different radius areas simultaneously contact the rock, covering the entire excavation face. In addition, the axis of the rollers 121 is perpendicular to the spherical tangent of the panel, forming a spherical arrangement, which helps to ensure that the rock-breaking force is perpendicular to the rock surface and acts directly on the normal direction where the rock's tensile strength is weakest, thereby improving rock-breaking efficiency.

[0050] It should be noted that setting the roller cutter 121 in a spherical arrangement on the cutterhead body 110 helps to increase the number of rocks broken by the roller cutter 121 during equipment excavation. By shearing and squeezing the roller cutter 121, the tensile strength of the rock is destroyed to break the rock, thereby improving the rock breaking efficiency.

[0051] It should be noted that the spherical trajectory refers to the spatial distribution path of the tool assembly 120 on the spherical panel of the cutter head body 110, forming a trajectory that covers the entire spherical surface. The tool trajectory must cover the entire spherical panel to reduce blind spots in rock breaking. This ensures that tools at different azimuth angles simultaneously contact the rock, improving the rock breaking efficiency.

[0052] Therefore, the cutterhead 100 provided in this embodiment, by setting a spherical panel, has cutter assemblies 120 spaced along the spherical trajectory of the panel. The curvature of the spherical surface makes the cutter distribution more uniform, covering a wider rock-breaking area, increasing the number of roller cutters 121 participating in rock breaking simultaneously when the cutterhead 100 breaks rock, thus improving rock-breaking efficiency. At the same time, this application is applicable to both full-face tunneling machine methods and cantilever tunneling machine methods, with a wide range of applications. By setting up a pipeline system 130, cooling and dust removal functions are achieved. At the same time, when the cutterhead 100 is working in soft rock formations, the soil pressure is adjusted to reduce the stickiness of the excavated soil, improve the overall working efficiency, reduce cutter consumption, and achieve the effect of low-power and environmentally friendly construction.

[0053] In one possible implementation, refer to Figure 3 As shown, the hob 121 includes a central hob 1211 and a front hob 1212. The central hob 1211 is disposed on the central conical plane of the panel, and the front hob 1212 is distributed at intervals around the central hob 1211 along the spherical trajectory of the panel.

[0054] For example, the radius of the profile of the cutter head body 110 is referenced. Figure 1 For the R area in the diagram, please refer to the central cone plane of the panel. Figure 1 In zone R1, the central cutter 1211 is used to crush the rock strata in zone R1. For example, the central cutter 1211 is arranged radially and is responsible for crushing the rock in the central area of ​​the cutterhead 100. Since the cutting tool linear speed is low and the rock stress is concentrated in this area, the cutting tools need to be arranged in a concentrated manner to improve the rock crushing efficiency.

[0055] For example, the front roller cutter 1212 is arranged on the spherical structure. The front roller cutter 1212 arranged on the spherical structure is mainly used to break the rock strata in the R2 area. The number of front roller cutters 1212 can be determined according to the diameter of the cutter head 100. They are arranged in a spiral or concentric circle and are mainly responsible for breaking rocks in the outer periphery of the sphere. The curvature of the sphere is used to achieve efficient coverage of a large diameter range.

[0056] By dividing the cutter head 121 into sections, the central cutter head 1211 first breaks the central rock to form radial cracks, and the front cutter head 1212 cuts into the outer rock along the crack propagation direction; at the same time, the combination of the central cone plane and the spherical arc surface covers the entire excavation face, reducing the problem of insufficient rock breaking at the edge of the traditional planar cutter head 100.

[0057] In one possible implementation, refer to Figure 3 As shown, the tool spacing of the center hob 1211 can be h1, and the tool spacing of the front hob 1212 can be h2; in the radial direction from the inner side to the outer side of the panel, the tool spacing h2 between adjacent front hobs 1212 gradually decreases.

[0058] It should be noted that the principle behind this design is that the radial radius of curvature of the spherical panel gradually increases, and the linear velocity of the outer hob 121 is higher than that of the inner side. In order to ensure that the rock breaking density is consistent within a unit arc length, the difference in linear velocity needs to be compensated by reducing the spacing between the outer hobs, thereby reducing the risk of missed cuts due to excessive spacing between the outer hobs.

[0059] Furthermore, due to the large size of the cutterhead 100 of the tunnel boring machine, the closer the cutter 121 is to the axis of the cutterhead body 110, the smaller the diameter of its cutting surface. The path that a single cutter 121 needs to cut is shorter, so there is no need to set too many cutters 121. Setting too many cutters 121 will only aggravate the wear of the cutter 121 and increase the tunneling cost. Similarly, the pipes far from the axis of the cutterhead body 110 have a larger diameter of their cutting surface, and the path that a single cutter 121 needs to cut is longer. Therefore, the adjacent cutters 121 are set more concentratedly, which ensures that the cutting efficiency of each cutter 121 is basically the same and that the tunneling speed is basically the same. This can effectively reduce the situation where some cutters 121 are damaged due to stress concentration.

[0060] For example, the larger the tool spacing h2 is near the center hob 1211, the smaller the tool spacing h2 is far from the center hob 1211. This makes the force on each hob 121 on the panel more uniform, effectively reducing the problem of local stress concentration and extending the service life of the cutter head 110.

[0061] In one possible implementation, adjacent hobs 121 are arranged in a spiral pattern on the panel.

[0062] Among them, adjacent hobs 121 are arranged along the spherical surface of the panel in a spiral trajectory. That is, while the hobs 121 rotate around the axis of the cutter head 100, they advance evenly in the radial direction (from the center to the edge), forming a spatial curve distribution similar to a spring coil.

[0063] By setting adjacent cutters 121 to be distributed in a spiral pattern, when the cutter head 100 rotates, the cutters 121 on the spiral pattern cut into the rock in sequence, forming a continuous spiral rock-breaking pattern, which improves the rock-breaking efficiency. Moreover, the spiral-distributed cutters 121 can gradually break the rock, reducing the damage to the cutters caused by the simultaneous impact of multiple cutters.

[0064] In one possible implementation, refer to Figure 4 As shown, the tool assembly 120 may include a hob 121, a tool holder 122, and a locking device 123. The tool holder 122 is disposed on the panel, and the hob 121 is disposed on the tool holder 122 by means of the locking device 123.

[0065] The cutter holder 122 can be fixed to the support structure of the panel by screws or other means, providing an installation interface for the hob cutter 121. It is usually made of wear-resistant cast steel and can withstand rock-breaking reaction forces. The locking device 123 connects the hob cutter 121 and the cutter holder 122, ensuring that the hob cutter 121 remains fixed under high-speed rotation and impact loads. Common locking methods include bolt locking, wedge locking, etc. This embodiment does not limit this.

[0066] In one possible implementation, the cutter head body 110 has a cavity inside, and the panel has a panel cavity communicating with the cavity; the pipeline system 130 passes through the cavity and the panel cavity in sequence.

[0067] It should be noted that the cavity inside the cutter head body 110 is a closed cavity structure formed by welding the panel, support plate and rib members. It is located in the central area of ​​the cutter head body 110 and is used to arrange the pipeline system 130 and some control elements.

[0068] Among them, the panel cavity is the interlayer cavity of the panel itself, which is set along the thickness direction of the spherical panel and communicates with the cavity of the cutter head body 110 to form the channel of the pipeline system 130.

[0069] The piping system 130 is located inside the cutterhead body 110 structure. On the one hand, it is physically protected by the panel and support plate, which can withstand the impact of rock collapse and reduce the risk of traditional external piping being easily broken.

[0070] In one possible implementation, refer to Figure 5As shown, the piping system 130 may include a rotary joint 131, a pipe channel 132, and a panel nozzle 133. The two ends of the rotary joint 131 are connected to an external water source and the pipe channel 132, respectively. The pipe channel 132 passes through the cavity and the panel cavity. The panel nozzle 133 is located on the front of the panel and communicates with the panel cavity for spraying fluid.

[0071] The rotary joint 131 is a rotary sealing device that connects the external water source to the internal pipeline of the cutter head 100. It allows water to be continuously supplied when the cutter head 100 rotates, and at the same time, it can isolate the rotation of the cutter head 100 from the water source to prevent water leakage.

[0072] The pipeline channel 132 is a fluid channel arranged in the cavity of the cutter head body 110 and the panel cavity. It may include a main channel (cavity section) and a branch channel (panel cavity section). It mainly guides the fluid from the rotary joint 131 to the panel joint, avoiding direct contact between the fluid and the cutter head 100 structural components.

[0073] Among them, the panel nozzle 133 is a fluid outlet device installed on the front of the panel. The nozzle direction is matched with the rock breaking area of ​​the roller cutter 121. It mainly sprays the fluid into the rock breaking area in the form of atomization or columnar spray to achieve functions such as cooling, dust removal, and soil improvement.

[0074] In one possible implementation, the angle between the spray direction of the panel nozzle 133 and the axis of the roller cutter 121 is between 30 and 60°, and it at least covers the rock-breaking area between adjacent roller cutters 121.

[0075] It should be noted that the angle between the spray direction of the panel nozzle 133 and the axis of the roller cutter 121 refers to the acute angle between the center line of the nozzle and the rotation axis of the roller cutter 121.

[0076] For example, the angle between the spray direction of the panel nozzle 133 and the axis of the roller cutter 121 can be 30°, 40°, 50°, 60° or any value between 30° and 60°.

[0077] For example, when the included angle is 30°, the water flow is sprayed along the rotation direction of the cutter head 121 (forward spraying), which reduces the soil adhesion by 50%, making it particularly suitable for cohesive soil or silty sand strata and improving the soil removal efficiency of the tunneling machine.

[0078] For example, a 60° angle is suitable for hard rock conditions, focusing on cooling, dust removal, and crack propagation. The water flow impacts the rock surface at an inclined angle, simultaneously penetrating into micro-cracks in the rock to create a wedging effect, effectively achieving cooling and dust removal.

[0079] By setting a rock-breaking area that at least covers the adjacent cutter head 121, it helps to ensure that the rock breaking interface is directly acted upon by the fluid, thus avoiding functional failure caused by missed spraying.

[0080] By setting the angle between the nozzle spray direction and the axis of the roller cutter 121, the pipeline system 130 achieves precise control over the entire rock breaking process, enhancing rock breaking efficiency in hard rock and improving construction continuity in soft rock. This is an important technological manifestation of the intelligent and efficient nature of the spherical cutterhead 100.

[0081] In one possible implementation, the hob 121 may include a single-edged hob, a toothed hob, or a double-edged hob. This embodiment does not limit this. In this way, by changing the type of tool, the structure of the cutter head 100 can be improved without modifying it, thereby increasing the equipment utilization rate.

[0082] In this embodiment, a removable maintenance cover is provided on the front of the panel, covering the mounting area of ​​the tool assembly 120. In this way, the tool assembly 120 can be directly replaced after the maintenance cover is removed. In addition, only the area to be maintained is exposed, reducing the intrusion of dust caused by opening the entire panel.

[0083] In this embodiment, refer to Figure 1 As shown, the system may also include a flange connector 140, which connects the cutter head body 110 and the drive system and drives the rotation of the cutter head body 110. For example, the flange connector 140 is coaxial with the axis of the drive system, preventing vibration and abnormal tool wear caused by eccentric loads. Simultaneously, it absorbs impact loads during hard rock breaking or rock fracturing, protecting the drive system and cutter head body 110 from damage.

[0084] The cutterhead and tunneling machine provided in this application embodiment, by setting a spherical panel, have the cutter assemblies distributed at intervals along the spherical trajectory of the panel. The curvature of the spherical surface makes the cutter distribution more uniform, covers a wider rock-breaking area, increases the number of roller cutters participating in rock breaking simultaneously when the cutterhead is breaking rock, and improves rock-breaking efficiency. At the same time, this application is applicable to both full-face tunneling machine methods and cantilever tunneling machine methods, with a wide range of applications. By setting up a pipeline system, cooling and dust removal functions are achieved. At the same time, when the cutterhead is working in soft rock formations, the earth pressure is adjusted to reduce the stickiness of the excavated soil, improve the overall working efficiency, reduce cutter consumption, and achieve the effect of low-power and environmentally friendly construction.

[0085] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0086] In the description of this application, it should be understood that the terms “comprising” and “having” as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are expressly listed, but may include other steps or units that are not expressly listed or that are inherent to such process, method, product, or apparatus.

[0087] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection within two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A cutter head, characterized in that, Includes the cutter head body, piping system, and multiple tool assemblies; The cutter head body includes a spherical panel, and the piping system is disposed on the panel and configured to deliver an external water source to the cutter head body and the panel; The cutting tool assembly is disposed on the panel and distributed at intervals along the spherical trajectory of the panel. The cutting tool assembly includes at least a hob, and the axes of all the hobs are perpendicular to the spherical tangent of the panel, forming a spherical arrangement.

2. The cutter head according to claim 1, characterized in that, The hobbing cutter includes a center hobbing cutter and a front hobbing cutter. The center hobbing cutter is disposed on the central conical plane of the panel, and the front hobbing cutter is distributed around the outer periphery of the center hobbing cutter along the spherical trajectory of the panel.

3. The cutter head according to claim 2, characterized in that, The spacing between the central hob is h1, and the spacing between the front hob is h2; In the radial direction from the inside to the outside of the panel, the tool spacing h2 between adjacent front hobs gradually decreases.

4. The cutter head according to any one of claims 1-3, characterized in that, The adjacent hobs are arranged in a spiral pattern on the panel.

5. The cutter head according to any one of claims 1-3, characterized in that, The cutting tool assembly includes a hob, a tool holder, and a locking device. The tool holder is disposed on the panel, and the hob is disposed on the tool holder via the locking device.

6. The cutter head according to any one of claims 1-3, characterized in that, The cutter head body has an internal cavity, and the panel has a panel cavity that communicates with the cavity; the pipeline system passes through the cavity and the panel cavity.

7. The cutter head according to claim 6, characterized in that, The piping system includes a rotary joint, a pipe channel, and a panel nozzle. The two ends of the rotary joint are respectively connected to an external water source and the pipe channel. The pipe channel passes through the cavity and the panel cavity. The panel nozzle is disposed on the panel and communicates with the panel cavity for spraying fluid.

8. The cutter head according to claim 7, characterized in that, The spray direction of the panel nozzle is at an angle of 30-60° to the axis of the roller cutter, and at least covers the rock-breaking area between adjacent roller cutters.

9. The cutter head according to any one of claims 1-3, characterized in that, The hob includes a single-edged hob, a toothed hob, or a double-edged hob. And / or, the front of the panel is provided with a removable access cover that covers the mounting area of ​​the tool assembly; And / or, it also includes a flange connection configured to connect the cutter head body and the drive system.

10. A tunneling machine, characterized in that, The shield includes a shield body and a cutterhead as described in any one of claims 1-9, the cutterhead being disposed at the tunneling end of the shield body, the shield body being provided with a drive system and configured to drive the cutterhead to rotate.

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