Large-span non-midwall multi-arch tunnel milling and digging construction equipment

Abstract

The embodiment of the application provides a large-span non-mid-partition multi-arch tunnel milling and digging construction equipment and relates to the field of tunnel construction equipment. The efficiency of multi-arch tunnel multi-arch part excavation is improved. The equipment comprises a excavator arm, a driving arm and a milling and digging head; the excavator arm is provided with a first connecting part, the driving arm is provided with a second connecting part; the milling and digging head is provided with a third connecting part and a fourth connecting part, the third connecting part is detachably connected with the first connecting part, and the fourth connecting part is detachably connected with the second connecting part; the milling and digging head rotates relative to the excavator arm within a preset angle range with a vertical plane, and the preset angle range is 0-90°. The milling and digging head can be directly assembled and connected with the excavator arm and the driving arm, the utilization rate of the machine body is obviously improved, and the machine is highly mobile; in addition, the milling and digging head can swing within 0-90° relative to the vertical plane, no dead angle excavation can be realized at different step heights, and obvious advantages are obtained for multi-arch part excavation.

Description

Technical Field

[0001] The present invention relates to the field of tunnel construction equipment, and in particular to a large-span, partition-free, multi-arch tunnel milling and excavation construction equipment. Background Art

[0002] With economic development and social progress, the highway construction industry is becoming increasingly mechanized. Various machines are developing towards being more economical, efficient, and multifunctional. Drum milling machines are often used in tunnel excavation. These machines are expensive and have limited functionality when purchased as a complete unit.

[0003] The arch parts of multi-arch tunnels are generally blasted using traditional methods, which require drilling, charging, and blasting. This is very dangerous and has hidden dangers and inaccurate positioning. It requires manual assistance and causes great disturbance to the surrounding rock, which will damage the quality of the first tunnel and make construction safety impossible to guarantee. Summary of the Invention

[0004] The objects of the present invention include, for example, providing a large-span multi-arch tunnel milling and excavation construction equipment without a central partition wall, which can improve the efficiency of excavation of the multi-arch part of the multi-arch tunnel.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the present invention provides a large-span, partition-free, multi-arch tunnel milling and excavation construction device, comprising an excavator arm, a drive arm, and a milling and excavation head;

[0007] The excavator arm is provided with a first connecting portion, and the driving arm is provided with a second connecting portion; the milling head is provided with a third connecting portion and a fourth connecting portion, the third connecting portion is detachably connected to the first connecting portion, and the fourth connecting portion is detachably connected to the second connecting portion; the driving arm is used to drive the milling head to rotate relative to the excavator arm;

[0008] The milling head rotates relative to the excavator arm within a preset angle range with respect to the vertical plane, and the preset angle range is 0-90°.

[0009] In addition, the large-span, partition-less, multi-arch tunnel milling and excavation equipment provided by the embodiments of the present invention may also have the following additional technical features:

[0010] Optionally, the milling head includes a mounting seat, a mounting frame, a cutting gear, a first bolt, and a second bolt; the first connecting portion is a first pin hole provided on the excavator arm, and the second connecting portion is a second pin hole provided on the driving arm; the third connecting portion is a third pin hole provided on the mounting seat, and the fourth connecting portion is a fourth pin hole provided on the mounting seat; the third pin hole corresponds to the first pin hole and is connected and fixed by the first bolt, and the fourth pin hole corresponds to the second pin hole and is connected and fixed by the second bolt;

[0011] The mounting frame is connected to the mounting seat, and the cut-off gear is arranged on the mounting frame.

[0012] Optionally, the milling head further includes a connecting frame; the mounting seat, the connecting frame and the mounting frame are connected in sequence.

[0013] Optionally, the mounting seat is provided with a first connecting plate; the connecting frame is provided with a second connecting plate and a third connecting plate; the mounting frame is provided with a fourth connecting plate; the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are arranged in sequence, the first connecting plate and the second connecting plate are adhered and fixedly connected, and the third connecting plate and the fourth connecting plate are adhered and fixedly connected.

[0014] Optionally, the mounting frame includes a first bracket and a second bracket; the first bracket is provided with the fourth connecting plate; the second bracket is connected to the end of the first bracket away from the fourth connecting plate, and the second bracket is tilted relative to the first bracket so that the second bracket is closer to the construction front relative to the first bracket during the construction process; the cutting gear is provided on the second bracket.

[0015] Optionally, the second bracket includes a first support plate and a second support plate arranged at intervals; the first support plate and the second support plate are both connected to the first bracket, and the second support plate is farther away from the construction front relative to the first support plate; the second support plate is inclined relative to the first support plate, wherein the inclination angle of the second support plate relative to the vertical plane is greater than the inclination angle of the first support plate relative to the vertical plane; the rotating shaft of the cutting gear is located between the first support plate and the second support plate.

[0016] Optionally, the large-span, partition-less, multi-arch tunnel milling and excavation construction equipment further includes a hydraulic motor, which is disposed in the first bracket and connected to the cutter gear, and is used to drive the cutter gear to rotate.

[0017] Optionally, the cutting gear includes a wheel body and multiple rows of cutting teeth; each row of cutting teeth includes multiple cutting teeth arranged at intervals along the circumference of the wheel body; the multiple rows of cutting teeth are arranged at intervals along the axial direction of the wheel body; the two rows of cutting teeth located at the outermost sides of the wheel body are both inclined toward the outer side of the wheel body.

[0018] Optionally, the angle between the two rows of picks located at the outermost sides of the wheel body and the vertical plane is in the range of 0-30°.

[0019] Optionally, there are two cut-off gears, and the two cut-off gears are arranged on both sides of the mounting frame.

[0020] The beneficial effects of the large-span, partition-less, multi-arch tunnel milling and excavation equipment according to the embodiments of the present invention include, for example:

[0021] Large-span, partition-free, multi-arch tunnel milling and excavation construction equipment comprises an excavator arm, a driving arm and a milling head; the excavator arm is provided with a first connecting part, and the driving arm is provided with a second connecting part; the milling head is provided with a third connecting part and a fourth connecting part, the third connecting part is detachably connected to the first connecting part, and the fourth connecting part is detachably connected to the second connecting part; the driving arm is used to drive the milling head to rotate relative to the excavator arm; the milling head rotates relative to the excavator arm within a preset angle range with the vertical plane, and the preset angle range is 0-90°.

[0022] The milling head can be directly assembled and connected to the excavator's arm and drive arm, allowing flexible selection between the bucket and the milling head, significantly improving machine body utilization and enhancing maneuverability. After removing the excavator bucket and installing the milling head, tunnel excavation can begin. No modifications are required to the excavator's crawler tracks, chassis, or excavation arm. The milling head effectively replaces the bucket, breaker, and other equipment, cutting and crushing the rock mass into slag. Furthermore, the milling head can swing from 0 to 90 degrees relative to the vertical, enabling seamless excavation at varying step heights. The excavation dimensions meet the requirements for overlapping arch space in multi-arch sections, with minimal disturbance to the rock mass and rapid trenching. There is no need for manual clearance of dangerous rocks, significantly improving construction efficiency. Compared to traditional explosive blasting, positioning is more accurate, significantly reducing disturbance to the surrounding rock and lining of the pilot tunnel, minimizing secondary damage and rework, and eliminating the need for manual assistance. This has significant advantages for excavating multi-arch sections, improving the efficiency of this area. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of a large-span, partition-free, multi-arch tunnel milling and excavation construction equipment provided by an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0026] Figure 3 A schematic structural diagram from a first perspective of a milling head in a large-span, partition-free, multi-arch tunnel milling and excavation construction equipment provided by an embodiment of the present invention;

[0027] Figure 4 A schematic structural diagram from a second perspective of a milling head in a large-span, partition-free, multi-arch tunnel milling and excavation construction equipment provided by an embodiment of the present invention.

[0028] Icons: 10- Construction equipment for milling and excavating large-span multi-arch tunnels without central partition walls; 100- Excavator arm; 110- Driving arm; 200- Milling head; 210- Mounting seat; 211- First connecting plate; 212- First mounting plate; 215- Second mounting plate; 213- First bolt; 214- Second bolt; 220- Connecting frame; 221- Second connecting plate; 222- Third connecting plate; 223- Support plate; 230- Mounting frame; 231- First bracket; 232- Fourth connecting plate; 233- Second bracket; 234- First support plate; 235- Second support plate; 240- Cutting gear; 241- Wheel body; 242- Cutting tooth; 300- Hydraulic motor; 400- Hydraulic hose. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0035] The following combination Figures 1 to 4 The large-span, partition-less, multi-arch tunnel milling and excavation equipment 10 provided in this embodiment is described in detail.

[0036] Please refer to Figure 1 , this embodiment provides a large-span, partition-free, arch-type tunnel milling and excavation construction equipment 10. The embodiment of the present invention provides a large-span, partition-free, arch-type tunnel milling and excavation construction equipment 10, including an excavator arm 100, a driving arm 110 and a milling head 200; the excavator arm 100 is provided with a first connecting part, and the driving arm 110 is provided with a second connecting part; the milling head 200 is provided with a third connecting part and a fourth connecting part, the third connecting part is detachably connected to the first connecting part, and the fourth connecting part is detachably connected to the second connecting part; the driving arm 110 is used to drive the milling head 200 to rotate relative to the excavator arm 100; the milling head 200 rotates relative to the excavator arm 100 within a preset angle range with the vertical plane, and the preset angle range is 0-90°.

[0037] The milling head 200 is detachably connected to the first and second connecting parts via a third and fourth connecting part, respectively, to achieve detachable assembly with the excavator arm 100. The milling head 200 and the hydraulic excavator can interchange the bucket and milling head 200. By removing the bucket from the hydraulic excavator and installing the milling head 200, tunnel excavation can be performed. No modifications are required to the excavator's crawler tracks, chassis, or excavation arm. Operation is simple and quick, enabling multi-purpose use of a single machine, economical use, and improved machine utilization.

[0038] Reference Figure 2The "preset angle" herein refers to Angle A, which ranges from 0-90°. Specifically, the preset angle is 45°. This facilitates the milling head 200 to achieve dead-angle excavation at different step heights. The excavation dimensions meet the requirements for arch space overlap in the multi-arch section, with minimal disturbance to the rock mass and rapid trenching. Manual clearance of dangerous rocks is also unnecessary, significantly improving construction efficiency. Compared to traditional explosive blasting, positioning is more accurate, significantly reducing disturbance to the surrounding rock and lining of the pilot tunnel, minimizing secondary damage and rework, and eliminating the need for manual assistance. This method offers significant advantages for excavating multi-arch sections, improving the efficiency of multi-arch excavation in multi-arch tunnels. It improves upon existing blasting and hammer excavation methods, avoiding and reducing excavation disturbances. It offers flexible operation and eliminates the need for manual labor, improving excavation quality and reducing construction safety risks. Therefore, the milling head 200, effectively connected to the hydraulic excavator arm 100, plays a particularly important role in excavating special areas and weak links in long-span, partition-free multi-arch tunnels.

[0039] Reference Figure 2 In this embodiment, the milling head 200 includes a mounting base 210, a mounting frame 230, a cutting gear 240, a first bolt 213 and a second bolt 214; the first connecting part is a first pin hole provided on the excavator arm 100, and the second connecting part is a second pin hole provided on the driving arm 110; the third connecting part is a third pin hole provided on the mounting base 210, and the fourth connecting part is a fourth pin hole provided on the mounting base 210; the third pin hole corresponds to the first pin hole and is connected and fixed by the first bolt 213, and the fourth pin hole corresponds to the second pin hole and is connected and fixed by the second bolt 214; the mounting frame 230 is connected to the mounting base 210, and the cutting gear 240 is provided on the mounting frame 230.

[0040] The driving arm 110 drives the milling head 200 to rotate around the center of the second pin hole. The first bolt 213 and the second bolt 214 are used to achieve disassembly and installation, which is convenient and fast. The cutting gear 240 is used to cut the rock mass during the rotation process.

[0041] Specifically, the mounting base 210 includes a first mounting plate 212 and a second mounting plate 215 that are spaced apart. The first mounting plate 212 and the second mounting plate 215 have first pin holes at corresponding positions, and the first mounting plate 212 and the second mounting plate 215 have second pin holes at corresponding positions.

[0042] Reference Figure 3 In this embodiment, the milling head 200 further includes a connecting frame 220; the mounting base 210, the connecting frame 220, and the mounting frame 230 are sequentially connected. The connecting frame 220 is disposed between the mounting base 210 and the mounting frame 230. The connecting frame 220 is used to increase the overall length of the milling head 200, thereby improving the flexibility of the milling head 200 and enhancing the efficiency and quality of excavation of the arch sections of a multi-arch tunnel.

[0043] Reference Figure 3 In this embodiment, the mounting base 210 is provided with a first connecting plate 211; the connecting frame 220 is provided with a second connecting plate 221 and a third connecting plate 222; the mounting frame 230 is provided with a fourth connecting plate 232; the first connecting plate 211, the second connecting plate 221, the third connecting plate 222 and the fourth connecting plate 232 are arranged in sequence, the first connecting plate 211 is attached to and fixedly connected with the second connecting plate 221, and the third connecting plate 222 is attached to and fixedly connected with the fourth connecting plate 232.

[0044] The first connecting plate 211, the second connecting plate 221, the third connecting plate 222 and the fourth connecting plate 232 are arranged in order from top to bottom. The first connecting plate 211 is attached to the second connecting plate 221 and connected by bolts, and the third connecting plate 222 is attached to the fourth connecting plate 232 and connected by bolts.

[0045] Specifically, the first mounting plate 212 and the second mounting plate 215 are both disposed on the first connecting plate 211 .

[0046] Specifically, the connecting frame 220 further includes a plurality of support plates 223 . The plurality of support plates 223 are spaced apart between the second connecting plate 221 and the third connecting plate 222 and are used to connect the second connecting plate 221 and the third connecting plate 222 .

[0047] Reference Figure 3 In this embodiment, the mounting frame 230 includes a first bracket 231 and a second bracket 233; the first bracket 231 is provided with a fourth connecting plate 232; the second bracket 233 is connected to the end of the first bracket 231 away from the fourth connecting plate 232, and the second bracket 233 is tilted relative to the first bracket 231, so that the second bracket 233 is close to the construction front relative to the first bracket 231 during the construction process; the cutting gear 240 is provided on the second bracket 233.

[0048] The second bracket 233 is tilted relative to the first bracket 231, which can make the cutting gear 240 closer to the construction front, improve the flexibility of the cutting gear 240, and expand the operating space of the cutting gear 240. The cutting gear 240 can perform all-round excavation operations and eliminate blind spots in operations.

[0049] Reference Figure 3In this embodiment, the second bracket 233 includes a first support plate 234 and a second support plate 235 arranged at intervals; the first support plate 234 and the second support plate 235 are both connected to the first bracket 231, and the second support plate 235 is farther away from the construction front relative to the first support plate 234; the second support plate 235 is inclined relative to the first support plate 234, wherein the inclination angle of the second support plate 235 relative to the vertical plane is greater than the inclination angle of the first support plate 234 relative to the vertical plane; the rotating shaft of the cutting gear 240 is located between the first support plate 234 and the second support plate 235.

[0050] The first support plate 234 and the second support plate 235 are arranged sequentially from left to right. The second support plate 235 is inclined at an angle B relative to the vertical, while the first support plate 234 is inclined at an angle C relative to the vertical. This allows the cutting gear 240 to be closer to the construction site during installation, expanding the construction range and achieving more precise construction positioning.

[0051] Reference Figure 3 In this embodiment, the large-span, partition-less, multi-arch tunnel milling and excavation construction equipment 10 further includes a hydraulic motor 300, which is disposed in the first bracket 231. The hydraulic motor 300 is connected to the cutting gear 240, and the hydraulic motor 300 is used to drive the cutting gear 240 to rotate.

[0052] The large-span, partition-free, multi-arch tunnel milling and excavation equipment 10 also includes an excavator hydraulic hose 400, which is connected to the hydraulic motor 300. The excavator hydraulic hose 400 is used to transport hydraulic oil to the hydraulic motor 300, and the hydraulic motor 300 is used to convert the hydraulic oil into mechanical energy to act on the cutting gear 240.

[0053] Once the excavator's hydraulic hose 400 is connected to the milling head 200, it can be used directly. The excavator generates mechanical energy during operation, which is converted into hydraulic energy by the hydraulic plunger pump. This energy is then distributed through the hydraulic system to the various actuators (hydraulic hose 400, hydraulic motor 300, and cutter gear 240). These actuators then convert the hydraulic energy back into mechanical energy, rotating the cutter gear 240 and allowing the drill bit to continuously break up the rock for excavation.

[0054] Reference Figure 4 In this embodiment, the cutting gear 240 includes a wheel body 241 and multiple rows of cutting teeth 242; each row of cutting teeth 242 includes multiple cutting teeth 242 arranged at intervals along the circumference of the wheel body 241; multiple rows of cutting teeth 242 are arranged at intervals along the axial direction of the wheel body 241; the two rows of cutting teeth 242 located on the outermost side of the wheel body 241 are both inclined toward the outer side of the wheel body 241.

[0055] Specifically, each cutting gear 240 is equipped with three rows of cutting teeth 242, which are spaced apart from each other from left to right. The leftmost cutting teeth 242 are tilted toward the left relative to the vertical, while the rightmost cutting teeth 242 are tilted toward the right relative to the vertical. This arrangement of cutting gears 240 ensures that the rock is fully cut while meeting the dimensional requirements for rapid grooving. This prevents the milling head 200 from directly colliding with the rock, which would otherwise loosen the rock mass, thereby increasing operational safety.

[0056] Reference Figure 4 In this embodiment, the angle between the two rows of picks 242 located on the outermost side of the wheel body 241 and the vertical plane is 0-30 degrees. Figure 4 The angle D shown in FIG. 1 is in the range of 0-30°.

[0057] Reference Figure 4 In this embodiment, there are two cutter gears 240, which are arranged on both sides of the mounting frame 230. The mounting frame 230 is used to install the hydraulic motor 300 and the hydraulic hose 400. The installation of the two cutter gears 240 does not affect the upper structure of the mounting frame 230.

[0058] The large-span, partition-free, multi-arch tunnel milling and excavation equipment 10 provided in this embodiment has at least the following advantages:

[0059] After removing the hydraulic excavator bucket, the milling head 200 is mounted on the excavator arm 100, achieving multi-purpose use and improving mechanical utilization. The milling head 200 is then used to excavate the arch section of the multi-arch tunnel. Compared to traditional blasting methods, the milling head 200 can rotate 0-90 degrees relative to the excavator arm 100 relative to the vertical plane, enabling seamless excavation at different step heights. The excavation size meets the requirements for the overlapping arch space in the multi-arch section, causing minimal disturbance to the rock mass, and achieving rapid trenching. Manual clearance of dangerous rocks is also unnecessary, significantly improving construction efficiency.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A large-span, partition-free, multi-arch tunnel milling and excavation equipment, characterized in that: include: An excavator arm (100), a driving arm (110) and a milling head (200); The excavator arm (100) is provided with a first connecting portion, and the driving arm (110) is provided with a second connecting portion; the milling head (200) is provided with a third connecting portion and a fourth connecting portion, the third connecting portion being detachably connected to the first connecting portion, and the fourth connecting portion being detachably connected to the second connecting portion; the driving arm (110) is used to drive the milling head (200) to rotate relative to the excavator arm (100); The milling head (200) rotates relative to the excavator arm (100) within a preset angle range relative to the vertical plane, and the preset angle range is 0-90°; The milling head (200) comprises a mounting seat (210), a connecting frame (220) and a mounting frame (230), wherein the mounting seat (210), the connecting frame (220) and the mounting frame (230) are connected in sequence; The mounting frame (230) includes a first bracket (231) and a second bracket (233), the second bracket (233) being tilted relative to the first bracket (231) so that the second bracket (233) is closer to the construction front relative to the first bracket (231) during the construction process; the second bracket (233) includes a first support plate (234) and a second support plate (235) being spaced apart, the first support plate (234) and the second support plate (235) being connected to the first bracket (231), and the second support plate (235) being away from the construction front relative to the first support plate (234), the second support plate (235) being tilted relative to the first support plate (234), and the inclination angle of the second support plate (235) relative to the vertical plane being greater than the inclination angle of the first support plate (234) relative to the vertical plane.

2. The large-span, partition-less, multi-arch tunnel milling and excavation equipment according to claim 1 is characterized by: The milling head (200) further comprises a cutting gear (240), a first bolt (213) and a second bolt (214); the first connecting portion is a first pin hole provided on the excavator arm (100), the second connecting portion is a second pin hole provided on the driving arm (110); the third connecting portion is a third pin hole provided on the mounting seat (210), and the fourth connecting portion is a fourth pin hole provided on the mounting seat (210); the third pin hole corresponds to the first pin hole and is connected and fixed by the first bolt (213), and the fourth pin hole corresponds to the second pin hole and is connected and fixed by the second bolt (214); The mounting frame (230) is connected to the mounting seat (210), and the cutter gear (240) is arranged on the mounting frame (230).

3. The large-span, partition-less, multi-arch tunnel milling and excavation equipment according to claim 2 is characterized by: The mounting seat (210) is provided with a first connecting plate (211); the connecting frame (220) is provided with a second connecting plate (221) and a third connecting plate (222); the mounting frame (230) is provided with a fourth connecting plate (232); the first connecting plate (211), the second connecting plate (221), the third connecting plate (222) and the fourth connecting plate (232) are provided in sequence, the first connecting plate (211) and the second connecting plate (221) are adhered and fixedly connected, and the third connecting plate (222) and the fourth connecting plate (232) are adhered and fixedly connected.

4. The large-span, partition-less, multi-arch tunnel milling and excavation equipment according to claim 3 is characterized by: The second bracket (233) is connected to an end of the first bracket (231) away from the fourth connecting plate (232), and the cutter gear (240) is arranged on the second bracket (233).

5. The large-span, partition-less, multi-arch tunnel milling and excavation equipment according to claim 4 is characterized by: The rotating shaft of the cut-off gear (240) is located between the first support plate (234) and the second support plate (235).

6. The large-span, partition-less, multi-arch tunnel milling and excavation equipment according to claim 4 is characterized by: The large-span, partition-less, multi-arch tunnel milling and excavation equipment further comprises a hydraulic motor (300), wherein the hydraulic motor (300) is arranged in the first bracket (231), the hydraulic motor (300) is connected to the cutting gear (240), and the hydraulic motor (300) is used to drive the cutting gear (240) to rotate.

7. The large-span, partition-free, multi-arch tunnel milling and excavation equipment according to any one of claims 2 to 6, characterized in that: The cutting gear (240) includes a wheel body (241) and multiple rows of cutting teeth (242); each row of the cutting teeth (242) includes multiple cutting teeth (242) arranged at intervals along the circumference of the wheel body (241); the multiple rows of cutting teeth (242) are arranged at intervals along the axial direction of the wheel body (241); the two outermost rows of the cutting teeth (242) located on the wheel body (241) are both inclined toward the outside of the wheel body (241).

8. The large-span, partition-less, multi-arch tunnel milling and excavation equipment according to claim 7 is characterized by: The angle between the two rows of picks (242) located on the outermost sides of the wheel body (241) and the vertical plane is in the range of 0-30 degrees.

9. The large-span, partition-less, multi-arch tunnel milling and excavation equipment according to claim 8 is characterized by: There are two cutting gears (240), and the two cutting gears (240) are arranged on both sides of the mounting frame (230).

Images