Shield tunneling machine cutterhead for hard rock stratum

Abstract

The invention relates to the technical field of shield tunneling machines, in particular to a shield tunneling machine cutterhead for hard rock stratum.The shield tunneling machine cutterhead comprises a main cutterhead body, a supporting frame, a butt joint disc, a rock crushing mechanism, a hob displacement mechanism and a reset mechanism, the supporting frame is fixed to the bottom of the main cutterhead body, and the butt joint disc is fixed to the side, away from the main cutterhead body, of the supporting frame; the butt joint disc and the main cutter disc body are coaxially arranged, the rock crushing mechanism is arranged on the main cutter disc body, the hob displacement mechanism is arranged on the rock crushing mechanism, rocks are crushed into small blocks in a rolling mode through the hob, meanwhile, through the arrangement of the cutting tool, the small blocks can move along the edge of the main cutter disc body, and therefore the cutting tool can cut the rocks into small blocks. According to the cutter head of the shield tunneling machine, rock which is not completely broken is further cut into finer particles, the rock breaking capacity of the cutter head of the shield tunneling machine in a hard rock stratum is effectively improved, and the rock breaking density of a hob is improved through the combined arrangement of the hob displacement mechanism and the reset mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of shield machines, and in particular to a shield machine cutterhead for use in hard rock formations. Background Art

[0002] With the acceleration of urbanization, the demand for the development of underground space is increasing. As an important tunnel construction equipment, the shield machine has achieved remarkable results under soft soil, sand and gravel and other geological conditions. However, for the excavation of hard rock formations, the traditional shield machine cutter head design has many shortcomings and it is difficult to meet the requirements of high efficiency and long life. The commonly used shield machine cutter heads on the market mainly include hob type, cutting type and composite type. These types of cutter heads have their own characteristics, but their performance in hard rock formations is not the same.

[0003] For example, 1. Roller cutter disc: Rocks are crushed by installing multiple roller cutters. The roller cutters are usually made of high-strength alloy steel, which has high wear resistance and impact resistance. The advantages are strong rock breaking ability and long service life; the disadvantages are high cost and easy damage when encountering rocks with greater hardness; 2. Cutting cutterhead: Cutting operations are performed by installing multiple cutting tools. The cutting tools are generally made of high-performance materials such as tungsten carbide. The advantages are good flexibility and strong adaptability; the disadvantages are fast wear in hard rock formations, frequent replacement, and high maintenance costs; 3. Composite cutterhead: It combines the advantages of the roller cutter type and the cutting type. It can advance quickly in softer formations and maintain high working efficiency in hard rock formations. However, the design of this cutterhead is complex, the manufacturing cost is high, and its stability under extreme geological conditions needs to be improved.

[0004] In the relevant technology, the application of existing shield machine cutter heads in hard rock formations generally has the following problems: First, the rock breaking capacity is insufficient, especially when facing extremely high hardness rocks, traditional cutter heads often cannot effectively break them; second, the durability is poor, and the cutter head is prone to severe wear after long-term use, resulting in a significant increase in maintenance costs; third, the reliability is low, and the complex geological environment puts higher requirements on the structural strength of the cutter head, and the existing design still needs to be improved in this regard. Summary of the invention In order to solve the problems that the current shield machine cutter head has insufficient rock breaking ability and durability in hard rock formations, high maintenance costs, and insufficient overall working reliability and stability, the present application provides a shield machine cutter head for hard rock formations.

[0005] The present application provides a shield machine cutter head for hard rock formations using the following technical solution: A shield machine cutter head for dealing with hard rock formations, comprising: A main cutter body, a support frame is fixed to the bottom of the main cutter body, a docking plate is fixed to the side of the support frame away from the main cutter body, and the docking plate is coaxially arranged with the main cutter body; A rock crushing mechanism, which is used for crushing rocks, and is arranged on the main cutter disc body, and comprises a cutting groove, a roller cutter groove, a cutting tool, a roller cutter bracket and a roller cutter, wherein the cutting groove is arranged at the edge of the main cutter disc body, the roller cutter groove is arranged on the end surface of the main cutter disc body away from the support frame, the cutting tool is fixed in the cutting groove, the roller cutter bracket is fixed in the roller cutter groove, and the roller cutter is rotatably connected to the roller cutter bracket; A roller cutter displacement mechanism, the roller cutter displacement mechanism is arranged on the rock crushing mechanism, and the roller cutter displacement mechanism comprises a transmission rod, a linkage cylinder, a first fixed plate and a driven disc, the transmission rod is fixed on the roller cutter bracket, the linkage cylinder is slidably connected to the transmission rod through the first fixed plate, and is coaxially arranged with the transmission rod, and the roller cutter is coaxially connected to the outside of the linkage cylinder, one end of the first fixed plate is fixed to the inner wall of the linkage cylinder, and the other end is slidably connected to the transmission rod, and the driven disc is coaxially and rotatably connected to the transmission rod; A reset mechanism is used to drive the roller displacement mechanism to reset, and the reset mechanism is arranged in the roller displacement mechanism.

[0006] By adopting the above technical solution, the setting of the roller cutter is used to break the rock into smaller blocks by rolling. At the same time, the setting of the cutting tool enables it to move along the edge of the main cutter head body, further cutting the incompletely broken rock into finer particles, thereby effectively improving the rock breaking ability of the shield machine cutter head in hard rock formations, and can effectively break high-hardness rocks to ensure the excavation speed; By utilizing the combined setting of the roller cutter displacement mechanism and the reset mechanism, the roller cutter can be displaced in a small range during the process of rolling and crushing rocks, thereby increasing the crushing density of the roller cutter for rocks. The reset mechanism enables the roller cutter to be quickly reset and reciprocate, thereby achieving an efficient crushing effect on rocks.

[0007] Optionally, the roller displacement mechanism also includes a supporting bracket, a worm wheel, a worm, a cam and an abutment plate, the supporting bracket is fixed on the driven plate, the worm wheel is rotatably connected to the supporting bracket, the worm is coaxially fixed to the transmission rod, and the worm wheel and the worm are meshed with each other, the cam is fixed on the cam, and the abutment plate is rotatably connected to one side of the first fixed plate and abuts against the cam.

[0008] By adopting the above technical solution, the rotation of the worm wheel at the edge of the worm is utilized to enable the worm wheel to mesh and rotate, and drive the cam to rotate, and by pushing the cam abutment plate and the linkage cylinder to move, the hob is driven to move.

[0009] Optionally, the reset mechanism includes a second fixed plate, a limiting rod, a positioning nut and a strong reset member, the second fixed plate is fixed to the inner wall of the linkage cylinder, one end of the limiting rod is fixed to the driven disk, and the other end passes through the second fixed plate and is slidably connected to the second fixed plate, the positioning nut is arranged on one end of the limiting rod away from the driven disk, the strong reset member is sleeved on the outside of the limiting rod, and one end of the strong reset member abuts against the second fixed plate, and the other end abuts against the positioning nut.

[0010] By adopting the above technical solution, the elastic force of the strong reset member is utilized to push the second fixed plate, thereby driving the linkage cylinder and the roller to reset quickly.

[0011] Optionally, a blocking rod is further provided on the driven disk, and the blocking rod is located between the driven disk and the second fixed plate.

[0012] By adopting the above technical solution, the second fixing plate is limited by the blocking rod to avoid collision between the second fixing plate and the driven plate.

[0013] Optionally, the inner walls of the cutting groove and the roller cutter groove are both provided with coolant spray holes, and a water injection ring is coaxially and sealingly rotatably connected to the bottom of the main cutter disc body, and the water injection ring and the interior of the main cutter disc body are both provided with cavities, and the cavity inside the main cutter disc body is respectively connected with the coolant spray hole and the water injection ring.

[0014] By adopting the above technical solution, coolant is sprayed through the coolant spray hole to cool the main cutter disc body, cutting tools and hobs, thereby enhancing the durability of the cutter disc, extending its service life and reducing maintenance costs.

[0015] Optionally, a conduit docking sleeve is provided on a side of the water injection ring away from the main cutter disc body, at least two conduit docking sleeves are symmetrically provided, and threads are provided on the inner walls of the conduit docking sleeves.

[0016] By adopting the above technical solution, the external flow guide pipe can be quickly connected to the water injection ring by using the catheter docking sleeve.

[0017] Optionally, the hob sleeve is arranged outside the linkage cylinder, and locking bolts are arranged on both sides of the hob, and the locking bolts are partially connected and locked with the linkage cylinder.

[0018] By adopting the above technical solution, the hob and the linkage cylinder can be quickly disassembled and assembled by using the locking bolt.

[0019] Optionally, the roller cutter is provided with multiple models, and the roller cutter located on the main cutter disc body is composed of a combination of at least two models.

[0020] By adopting the above technical solution and utilizing various types of roller cutters, the rock crushing capability of the shield machine cutter head can be further improved.

[0021] Optionally, the cutting tool is made of tungsten carbide, and the hob is made of high-strength alloy steel.

[0022] By adopting the above technical solution, high-strength materials are used to increase the service life and structural strength of cutting tools and hobs.

[0023] Optionally, a monitoring sensor is also provided on the main cutter body, and a plurality of monitoring sensors are provided and located at different positions on the main cutter body.

[0024] By adopting the above technical solutions, real-time monitoring and intelligent control using monitoring sensors can ensure the safe operation of the shield machine under harsh geological conditions.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The setting of the roller cutter is used to break the rock into smaller pieces by rolling. At the same time, the setting of the cutting tool enables it to move along the edge of the main cutter disc, further cutting the incompletely broken rock into smaller particles, thereby effectively improving the rock breaking ability of the shield machine cutter disc in hard rock formations, and can effectively break high-hardness rocks to ensure the excavation speed; 2. The combination of the cutter displacement mechanism and the reset mechanism enables the cutter to be displaced in a small range during the rolling and crushing of rocks, thereby increasing the crushing density of the cutter for the rocks. The reset mechanism enables the cutter to be quickly reset and reciprocated, thereby achieving an efficient crushing effect for the rocks. 3. Use the coolant spray hole to spray coolant, thereby cooling the main cutter head, cutting tools and hobs, which enhances the durability of the cutter head, extends its service life and reduces maintenance costs; 4. Use monitoring sensors for real-time monitoring and intelligent control to ensure the safe operation of the shield machine under harsh geological conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the top structure of the main cutter body of a shield machine cutter head for use in hard rock formations in this embodiment.

[0027] Figure 2 It is a schematic diagram of the bottom structure of the main cutter disc in this embodiment.

[0028] Figure 3 In this embodiment Figure 1 Enlarged view of point A.

[0029] Figure 4 Schematic diagram of the hob connection structure in this embodiment.

[0030] Figure 5 Schematic diagram of the structure of the hob displacement mechanism in this embodiment.

[0031] Figure 6 It is a schematic diagram of the cross section of the linkage cylinder and its internal connection structure in this embodiment.

[0032] Figure 7 Schematic diagram of the driven disk and its overall connection structure in this embodiment.

[0033] Figure 8 It is a schematic diagram of the linkage cylinder structure in this embodiment.

[0034] Description of reference numerals: 1. Main cutter body; 2. Support frame; 3. Docking plate; 4. Rock crushing mechanism; 41. Cutting groove; 42. Hob groove; 43. Cutting tool; 44. Hob bracket; 45. Hob; 5. Hob displacement mechanism; 51. Transmission rod; 52. Linkage cylinder; 53. First fixed plate; 54. Driven plate; 55. Support frame; 56. Worm gear; 57. Worm; 58. Cam; 59. Abutment plate; 6. Reset mechanism; 61. Second fixed plate; 62. Limit rod; 63. Positioning nut; 64. Powerful reset member; 65. Stop rod; 7. Coolant spray hole; 8. Water injection ring; 9. Conduit docking tube; 10. Locking bolt. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-8 This application is described in further detail.

[0036] The embodiment of the present application discloses a shield machine cutter head for dealing with hard rock formations.

[0037] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] Reference Figure 1 and Figure 2A shield machine cutterhead for hard rock formations includes a main cutterhead body 1, a support frame 2, a docking plate 3, a rock crushing mechanism 4, a roller cutter displacement mechanism 5 and a reset mechanism 6. The support frame 2 is fixed to the bottom of the main cutterhead body 1, and a docking plate 3 is fixed to the side of the support frame 2 away from the main cutterhead body 1. The docking plate 3 is coaxially arranged with the main cutterhead body 1. The rock crushing mechanism 4 is arranged on the main cutterhead body 1, and the roller cutter displacement mechanism 5 is arranged on the rock crushing mechanism 4. The setting of the roller cutter 45 is used to crush the rock into smaller blocks by rolling. At the same time, the setting of the cutting tool 43 makes It can move along the edge of the main cutter head body, further cutting the incompletely crushed rock into finer particles, thereby effectively improving the rock breaking ability of the shield machine cutter head in hard rock formations, and can effectively crush high-hardness rocks to ensure the excavation speed; by utilizing the combined setting of the cutter displacement mechanism 5 and the reset mechanism 6, the cutter 45 can be displaced in a small range during the process of rolling and crushing the rock, thereby increasing the crushing density of the cutter 45 for the rock, and the reset mechanism 6 allows the cutter 45 to be quickly reset and reciprocating, thereby achieving an efficient crushing effect on the rock.

[0039] Reference Figure 3 and Figure 4 Specifically, the rock crushing mechanism 4 includes a cutting groove 41, a roller cutter groove 42, a cutting tool 43, a roller cutter bracket 44 and a roller cutter 45. The cutting groove 41 is arranged at the edge of the main cutter disc body 1, and the roller cutter groove 42 is arranged on the end surface of the main cutter disc body 1 away from the support frame 2. The cutting tool 43 is fixed in the cutting groove 41, the roller cutter bracket 44 is fixed in the roller cutter groove 42, and the roller cutter 45 is rotatably connected to the roller cutter bracket 44.

[0040] Reference Figure 5 and Figure 6 In the embodiment of the present application, regarding the roller displacement mechanism 5, the roller displacement mechanism 5 includes a transmission rod 51, a linkage cylinder 52, a first fixed plate 53, a driven plate 54, a support bracket 55, a worm wheel 56, a worm 57, a cam 58 and an abutment plate 59. The rotation of the worm wheel 56 at the edge of the worm 57 enables the worm wheel 56 to engage and rotate, and drives the cam 58 to rotate, and by pushing the cam 58 to move the abutment plate 59 and the linkage cylinder 52, the roller 45 is driven to move.

[0041] In the embodiment of the present application, the transmission rod 51 is fixed on the hob bracket 44, the linkage cylinder 52 is slidably connected to the transmission rod 51 through the first fixed plate 53, and is coaxially arranged with the transmission rod 51, and the hob 45 is coaxially connected to the outside of the linkage cylinder 52, one end of the first fixed plate 53 is fixed on the inner wall of the linkage cylinder 52, and the other end is slidably connected to the transmission rod 51, the driven plate 54 is coaxially and rotatably connected to the transmission rod 51, the supporting bracket 55 is fixed on the driven plate 54, the worm gear 56 is rotatably connected to the supporting bracket 55, the worm 57 is coaxially fixed on the transmission rod 51, and the worm gear 56 and the worm 57 are meshed with each other, the cam 58 is fixed on the cam 58, and the abutment plate 59 is rotatably connected to one side of the first fixed plate 53 and abuts against the cam 58.

[0042] Reference Figure 7 and Figure 8 Specifically, in the embodiment of the present application, regarding the reset mechanism 6, the reset mechanism 6 includes a second fixed plate 61, a limit rod 62, a positioning nut 63 and a strong reset member 64. The elastic force of the strong reset member 64 is used to push the second fixed plate 61, thereby driving the linkage cylinder 52 and the roller 45 to quickly reset.

[0043] Specifically, the second fixed plate 61 is fixed on the inner wall of the linkage cylinder 52, one end of the limiting rod 62 is fixed on the driven disk 54, and the other end passes through the second fixed plate 61 and is slidably connected with the second fixed plate 61, and the positioning nut 63 is arranged on the end of the limiting rod 62 away from the driven disk 54, and the strong reset member 64 is sleeved on the outside of the limiting rod 62, and one end of the strong reset member 64 abuts against the second fixed plate 61, and the other end abuts against the positioning nut 63.

[0044] In the embodiment of the present application, regarding the driven disk 54, a blocking rod 65 is also provided on the driven disk 54, and the blocking rod 65 is located between the driven disk 54 and the second fixed plate 61. The blocking rod 65 is used to limit the second fixed plate 61 to avoid collision between the second fixed plate 61 and the driven disk 54.

[0045] In the embodiment of the present application, the inner walls of the cutting groove 41 and the roller cutter groove 42 are both provided with coolant spray holes 7, and a water injection ring 8 is coaxially sealed and rotatably connected to the bottom of the main cutter disc body 1, and the water injection ring 8 and the interior of the main cutter disc body 1 are both provided with cavities, and the cavity inside the main cutter disc body 1 is respectively connected with the coolant spray hole 7 and the water injection ring 8, and a catheter docking tube 9 is provided on the side of the water injection ring 8 away from the main cutter disc body 1, and at least two catheter docking tubes 9 are symmetrically provided, and threads are provided on the inner wall of the catheter docking tube 9.

[0046] The coolant is sprayed through the coolant spray hole 7 to cool the main cutter disc body 1, the cutting tool 43 and the roller cutter 45, thereby enhancing the durability of the cutter disc, extending the service life and reducing the maintenance cost. At the same time, the external guide tube can be quickly connected to the water injection ring 8 by using the conduit docking tube 9.

[0047] The hob 45 is sleeved on the outside of the linkage cylinder 52, and locking bolts 10 are provided on both sides of the hob 45. Part of the locking bolts 10 are connected and locked with the linkage cylinder 52. The hob 45 is provided with multiple models, and the hob 45 located on the main cutter disc body 1 is composed of a combination of at least two models, and the cutting tool 43 is made of tungsten carbide material, and the hob 45 is made of high-strength alloy steel.

[0048] In the embodiment of the present application, the locking bolt 10 is used to enable the roller cutter 45 and the linkage cylinder 52 to be quickly disassembled and assembled, and multiple models of roller cutters 45 are used to further improve the rock crushing ability of the shield machine cutter head. At the same time, high-strength materials are used to increase the service life and structural strength of the cutting tool 43 and the roller cutter 45.

[0049] A monitoring sensor is also provided on the main cutter head body 1, and there are multiple monitoring sensors, which are located at different positions on the main cutter head body 1. The monitoring sensors are used for real-time monitoring and intelligent control to ensure the safe operation of the shield machine under harsh geological conditions.

[0050] The implementation principle of the shield machine cutter head for hard rock formations in an embodiment of the present application is as follows: when the shield machine enters the hard rock formation, the main cutter head body 1 first contacts the rock surface, and the roller cutter 45 in the rock crushing mechanism 4 starts to rotate and gradually cuts into the rock, breaking the rock into smaller blocks by rolling. At the same time, the cutting tool 43 moves along the edge of the main cutter head body 1, further cutting the incompletely crushed rock into finer particles, and transports cold water to the coolant nozzle 7 through the water cooling pipe. The cold water is sprayed onto the cutting tool 43 and the roller cutter 45 through the coolant nozzle 7 to take away the heat and prevent overheating. The monitoring sensor collects various data in real time and sends them to the control system through wireless transmission, so that the operator can understand the working status of the cutter head at any time and adjust the operating parameters in time.

[0051] Specific operation steps: S1: Check whether the main cutter body 1, the hob 45, the cutting tool 43, the cooling system and the monitoring sensor are intact; S2: Start the cooling system and ensure that the water cooling pipes are unobstructed; S3: Turn on the monitoring sensors and confirm that all sensors are working properly; S4: Slowly drive the shield machine forward so that the main cutter head 1 gradually contacts the rock surface; S5: gradually increase the thrust so that the roller cutter 45 and the cutting tool begin to break the rock; S6: Closely monitor the data of the monitoring sensor. If any abnormality is found, stop the operation immediately and carry out maintenance; S7: Regularly check the wear of the hob 45 and the cutting tool and replace them if necessary; S8: After completing the excavation work, turn off the cooling system and monitoring sensors and clean the residue on the cutterhead.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A shield machine cutter head for hard rock formations, characterized in that: include: A main cutter body (1), a support frame (2) being fixed at the bottom of the main cutter body (1), a docking plate (3) being fixed on a side of the support frame (2) away from the main cutter body (1), and the docking plate (3) being coaxially arranged with the main cutter body (1); A rock crushing mechanism (4) for crushing rocks, the rock crushing mechanism (4) being arranged on the main cutter body (1), and comprising a cutting groove (41), a roller cutter groove (42), a cutting tool (43), a roller cutter support (44) and a roller cutter (45), the cutting groove (41) being arranged at the edge of the main cutter body (1), the roller cutter groove (42) being arranged on the end surface of the main cutter body (1) away from the support frame (2), the cutting tool (43) being fixed in the cutting groove (41), the roller cutter support (44) being fixed in the roller cutter groove (42), and the roller cutter (45) being rotatably connected to the roller cutter support (44); A roller cutter displacement mechanism (5), the roller cutter displacement mechanism (5) being arranged on the rock crushing mechanism (4), and comprising a transmission rod (51), a linkage cylinder (52), a first fixing plate (53) and a driven plate (54), the transmission rod (51) being fixed on the roller cutter bracket (44), the linkage cylinder (52) being slidably connected to the transmission rod (51) via the first fixing plate (53), and being coaxially arranged with the transmission rod (51), and the roller cutter (45) being coaxially connected to the outside of the linkage cylinder (52), one end of the first fixing plate (53) being fixed to the inner wall of the linkage cylinder (52), and the other end of the first fixing plate (53) being slidably connected to the transmission rod (51), and the driven plate (54) being coaxially and rotatably connected to the transmission rod (51); A reset mechanism (6) is used to drive the roller displacement mechanism (5) to reset, and the reset mechanism (6) is arranged in the roller displacement mechanism (5).

2. The shield machine cutter head for hard rock formations according to claim 1, characterized in that: The roller displacement mechanism (5) further comprises a support frame (55), a worm wheel (56), a worm (57), a cam (58) and an abutment plate (59); the support frame (55) is fixed on the driven plate (54); the worm wheel (56) is rotatably connected to the support frame (55); the worm (57) is coaxially fixed to the transmission rod (51); the worm wheel (56) and the worm (57) are meshed with each other; the cam (58) is fixed on the cam (58); and the abutment plate (59) is rotatably connected to one side of the first fixed plate (53) and abuts against the cam (58).

3. The shield machine cutter head for hard rock formations according to claim 1, characterized in that: The reset mechanism (6) comprises a second fixed plate (61), a limiting rod (62), a positioning nut (63) and a strong reset member (64); the second fixed plate (61) is fixed to the inner wall of the linkage cylinder (52); one end of the limiting rod (62) is fixed to the driven disk (54); the other end passes through the second fixed plate (61) and is slidably connected to the second fixed plate (61); the positioning nut (63) is arranged on one end of the limiting rod (62) away from the driven disk (54); the strong reset member (64) is sleeved on the outside of the limiting rod (62); one end of the strong reset member (64) abuts against the second fixed plate (61) and the other end abuts against the positioning nut (63).

4. The shield machine cutter head for hard rock formations according to claim 3, characterized in that: A blocking rod (65) is also provided on the driven disk (54), and the blocking rod (65) is located between the driven disk (54) and the second fixing plate (61).

5. The shield machine cutter head for hard rock formations according to claim 1, characterized in that: The inner walls of the cutting groove (41) and the roller cutter groove (42) are both provided with cooling liquid spray holes (7), and a water injection ring (8) is coaxially and sealingly rotatably connected to the bottom of the main cutter disc body (1), and the water injection ring (8) and the main cutter disc body (1) are both provided with cavities, and the cavity inside the main cutter disc body (1) is respectively connected to the cooling liquid spray hole (7) and the water injection ring (8).

6. The shield machine cutter head for hard rock formations according to claim 5, characterized in that: A conduit docking tube (9) is provided on the side of the water injection ring (8) away from the main cutter disc body (1), at least two conduit docking tubes (9) are symmetrically provided, and threads are provided on the inner walls of the conduit docking tubes (9).

7. The shield machine cutter head for hard rock formations according to claim 1, characterized in that: The roller cutter (45) is sleeved outside the linkage cylinder (52), and locking bolts (10) are provided on both sides of the roller cutter (45), and parts of the locking bolts (10) are connected and locked to the linkage cylinder (52).

8. The shield machine cutter head for hard rock formations according to claim 1, characterized in that: The roller cutter (45) is provided with a plurality of models, and the roller cutter (45) located on the main cutter disc body (1) is composed of a combination of at least two models.

9. The shield machine cutter head for hard rock formations according to claim 1, characterized in that: The cutting tool (43) is made of tungsten carbide, and the hob (45) is made of high-strength alloy steel.

10. The shield machine cutter head for hard rock formations according to claim 1, characterized in that: The main cutter body (1) is also provided with a monitoring sensor, and a plurality of the monitoring sensors are provided and are located at different positions on the main cutter body (1).

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