Tunnel impact milling excavator

Abstract

The invention relates to the field of tunnel construction, in particular to a tunnel impact milling excavator. The excavator comprises an excavator body, an excavating arm mechanism, a turnover device, an impact milling and excavating device and an excavator bucket arranged at the tail end of the excavating arm mechanism. The turnover device comprises a turnover seat arranged on the excavator main body, a rotating shaft which is rotationally arranged on the turnover seat and is connected with the digging arm mechanism, and a rotary driving device which is arranged on the turnover seat and is in driving connection with the rotating shaft; the impact milling and digging device comprises an impact milling and digging mechanism, a telescopic rotating arm of which the two ends are rotationally connected with the impact milling and digging mechanism and the digging arm mechanism respectively, a rotating power device a which is arranged at one end of the telescopic rotating arm and is in transmission connection with the digging arm mechanism, and a rotating power device b which is arranged at the other end of the telescopic rotating arm and is in transmission connection with the impact milling and digging mechanism; and an oil cylinder for adjusting the length is arranged in the telescopic rotating arm. Rock can be drilled firstly, then impacted and fractured, and finally shoveled out through the excavator bucket.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction, in particular to a tunnel impact milling machine. Background Art

[0002] In tunnel mechanical excavation construction, small-section tunnels require small equipment or modifications, which affects efficiency. Extra-large-section tunnels require high mechanical excavation capacity and stability, and are prone to failures and safety hazards. Mechanical excavation speed is affected by geological conditions, equipment performance and operating level. Complex geological conditions and time-consuming equipment assembly and commissioning affect construction efficiency. Tunnel machinery is expensive to purchase and rent, and has high operating and maintenance costs, including energy consumption, parts replacement, and repair and maintenance.

[0003] During tunnel construction, after blasting the rocks, some rocks still cannot be effectively blasted. The under-excavated rocks affect the next step of the primary lining process and need to be broken before they can be carried out. Existing equipment cannot accurately break the under-excavated parts. If an excavator is simply used to crush and excavate the remaining rocks, the construction efficiency will be low. Currently, there is no effective device for breaking the under-excavated rocks. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the background technology and propose a tunnel impact milling machine which first drills holes in rocks, then impacts and breaks them, and finally digs out a tunnel through a bucket.

[0005] The technical solution of the present invention is a tunnel impact milling machine, which includes an excavator body, an arm mechanism, a flipping device, an impact milling device and a bucket arranged at the end of the arm mechanism; the flipping device includes a flipping seat arranged on the excavator body, a rotating shaft rotatably arranged on the flipping seat and connected to the arm mechanism, and a rotating drive device arranged on the flipping seat and drivingly connected to the rotating shaft; the impact milling device includes an impact milling mechanism, a telescopic rotating arm whose two ends are respectively rotatably connected to the impact milling mechanism and the arm mechanism, a rotating power device a arranged at one end of the telescopic rotating arm and transmission connected to the arm mechanism, and a rotating power device b arranged at the other end of the telescopic rotating arm and transmission connected to the impact milling mechanism, and the telescopic rotating arm has a built-in oil cylinder for adjusting the length.

[0006] Preferably, the excavator body includes a crawler chassis, a cab and a power unit arranged on the crawler chassis, a main arm rotatably arranged on the cab and the power unit, a hydraulic telescopic mechanism a whose two ends are rotatably connected to the cab, the power unit and the main arm respectively, a secondary arm rotatably arranged at the front end of the main arm, a hydraulic telescopic mechanism b whose two ends are rotatably connected to the main arm and the secondary arm respectively, and a turning seat is arranged on the secondary arm; the excavator arm mechanism includes a rotating arm rotatably connected to the bucket, a rotating plate b rotatably connected to the rotating arm, a rotating plate a rotatably connected to the rotating plate b and the bucket respectively at both ends, and a hydraulic telescopic mechanism c rotatably connected to the rotating arm and the rotating plate a respectively at both ends, the rotating shaft is connected to the rotating arm, and the rotating power unit a is transmission connected to the rotating arm.

[0007] Preferably, the telescopic rotating arm comprises a plurality of mounting cylinders which are slidably connected in sequence, and the oil cylinder is arranged in the mounting cylinder at one end and connected to the mounting cylinder at the other end.

[0008] Preferably, the impact milling and digging mechanism includes a rotating seat rotatably connected to the telescopic rotating arm, a load-bearing seat arranged on the rotating seat and capable of being abutted by the digging teeth of the bucket, an impact milling and digging assembly rotatably arranged on the rotating seat, and a rotating driving device arranged on the rotating seat and driving the impact milling and digging assembly to rotate, and the rotating power device b is transmission-connected to the rotating seat.

[0009] Preferably, the rotary drive device, the rotary power device a, the rotary power device b and the rotation drive device all adopt hydraulic motors or electric motors.

[0010] Preferably, the impact milling assembly includes a mounting frame rotatably arranged on a rotating seat, a sliding frame slidably arranged on the mounting frame, a propulsion cylinder arranged on the mounting frame and with a movable end connected to the sliding frame, and a plurality of impact milling modules arranged side by side on the sliding frame.

[0011] Preferably, the impact milling module includes a rock drill and a mounting seat arranged on a sliding frame, a squeezer slidably arranged on the mounting seat and having a penetration channel, and a drill rod connected to the output end of the rock drill and passing through the penetration channel.

[0012] Preferably, the drill rod comprises a hexagonal column segment, a round rod segment and a drill bit which are connected in sequence, and an abutment ring arranged on the round rod segment, the abutment ring intermittently abuts against the squeezer, and the round rod segment is an elastic structure.

[0013] Preferably, the squeezer includes a sliding seat portion and a squeeze head portion which are integrally connected, the squeeze head portion having an extrusion barrel portion and two triangular blade portions symmetrically arranged on both sides of the extrusion barrel portion, the triangular blade portions being a stepped three-section structure with a gradually increasing slope, and the cross-sectional size of the three-section structure gradually increases from front to back.

[0014] Preferably, the mounting seat includes a detachably connected connecting plate a and a connecting plate b, self-lubricating copper blocks arranged on both sides of the sliding seat and respectively slidably connected to the connecting plate a and the connecting plate b, and a rubber pad arranged between the connecting plate a and the sliding frame, and the connecting plate b has a limiting groove for limiting the movable range of the sliding seat.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The invention can be adjusted to the working posture of the arch or the working posture of the inverted arch, and the under-excavated rock can be first drilled by the impact milling device, and then impacted and broken. Then, the working posture is adjusted to the recovery posture, and the broken rock is shoveled out by the bucket. The rock breaking effect is good, the efficiency is high, and the flexibility is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of adjusting the impact milling device to a recovery posture according to an embodiment of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the working posture of the arch in an embodiment of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the working posture of the inverted arch according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the impact milling device in an embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of the partial structure of the impact milling device;

[0022] Figure 6 It is a structural schematic diagram of the drill pipe;

[0023] Figure 7 It is a schematic diagram of the structure of the squeezer;

[0024] Figure 8 It is a schematic diagram of the structure of the connecting plate b.

[0025] Figure numerals: 1. crawler chassis; 2. cab and power unit; 3. main arm; 4. hydraulic telescopic mechanism a; 5. auxiliary arm; 6. hydraulic telescopic mechanism b; 7. flip seat; 8. rotating shaft; 9. rotary drive device; 10. rotating arm; 11. hydraulic telescopic mechanism c; 12. rotating plate a; 13. rotating plate b; 14. bucket; 15. telescopic rotating arm; 16. rotating seat; 17. load-bearing seat; 18. mounting frame; 19. sliding frame; 20. thrust cylinder; 21. rock drill; 22. drill rod; 221. hexagonal prism section; 222. round rod section; 223. drill bit; 224. abutment ring; 23. connecting plate a; 24. connecting plate b; 25. crusher; 251. sliding seat; 252. crushing head. DETAILED DESCRIPTION

[0026] Embodiment 1

[0027] like Figure 1-Figure 8 As shown, the tunnel impact milling machine proposed in this embodiment includes an excavator body, an arm mechanism, a flipping device, an impact milling device, and a bucket 14 arranged at the end of the arm mechanism.

[0028] The flipping device includes a flipping seat 7 arranged on the excavator body, a rotating shaft 8 rotatably arranged on the flipping seat 7 and connected to the digging arm mechanism, and a rotating drive device 9 arranged on the flipping seat 7 and drivingly connected to the rotating shaft 8. The rotating drive device 9 drives the rotating shaft 8 to rotate, and the rotating shaft 8 drives the digging arm mechanism to rotate, thereby adjusting the orientation of the digging arm mechanism.

[0029] The impact milling and digging device includes an impact milling and digging mechanism, a telescopic rotating arm 15 whose two ends are rotatably connected to the impact milling and digging mechanism and the digging arm mechanism respectively, a rotating power device a arranged at one end of the telescopic rotating arm 15 and connected to the digging arm mechanism, and a rotating power device b arranged at the other end of the telescopic rotating arm 15 and connected to the impact milling and digging mechanism. The telescopic rotating arm 15 has a built-in oil cylinder for adjusting the length.

[0030] The main body of the excavator includes a crawler chassis 1, a cab and a power unit 2 arranged on the crawler chassis 1, a main arm 3 rotatably arranged on the cab and the power unit 2, a hydraulic telescopic mechanism a4 with two ends rotatably connected to the cab and the power unit 2 and the main arm 3, a secondary arm 5 rotatably arranged at the front end of the main arm 3, a hydraulic telescopic mechanism b6 with two ends rotatably connected to the main arm 3 and the secondary arm 5, and a flip seat 7 arranged on the secondary arm 5. The driver controls the movement of the entire machine and the actions of each mechanism in the cab and the power unit 2, adjusts the position of the main arm 3 through the hydraulic telescopic mechanism a4, and adjusts the position of the secondary arm 5 through the hydraulic telescopic mechanism b6. In addition, the operation of the machine can also be controlled by remote control, and the length of the main arm 3 can be flexibly designed according to actual use requirements.

[0031] The digging arm mechanism includes a rotating arm 10 rotatably connected to a bucket 14, a rotating plate b13 rotatably connected to the rotating arm 10, a rotating plate a12 rotatably connected to the rotating plate b13 and the bucket 14 at both ends, and a hydraulic telescopic mechanism c11 rotatably connected to the rotating arm 10 and the rotating plate a12 at both ends, and the movement of the bucket 14 is controlled by the hydraulic telescopic mechanism c11. The rotating shaft 8 is connected to the rotating arm 10, and the rotating power device a is transmission-connected to the rotating arm 10. When the rotating power device a is in operation, the telescopic rotating arm 15 rotates on the rotating arm 10, and the length of the rotating arm 10 can be flexibly designed according to actual use requirements.

[0032] The telescopic rotating arm 15 includes a plurality of mounting tubes which are slidably connected in sequence. The oil cylinder is arranged in the mounting tube at one end and connected to the mounting tube at the other end. The length of the entire telescopic rotating arm 15 is adjusted by the extension and retraction of the oil cylinder. When the oil cylinder is actuated, the position of the impact milling mechanism is adjusted by the rotating power device a and the rotating power device b.

[0033] The impact milling mechanism includes a rotating seat 16 rotatably connected to the telescopic rotating arm 15, a bearing seat 17 disposed on the rotating seat 16 and capable of being abutted by the digging teeth of the bucket 14, an impact milling assembly rotatably disposed on the rotating seat 16, and a rotating driving device disposed on the rotating seat 16 and driving the impact milling assembly to rotate. The rotating power device b is in transmission connection with the rotating seat 16 to drive the rotating seat 16 to rotate. The rotating driving device drives the impact milling assembly to rotate, adjusts the orientation of the impact milling assembly, and uses the impact milling assembly to perform drilling and impact fracture treatment on rocks in different orientations.

[0034] The rotary drive device 9, the rotary power device a, the rotary power device b and the rotation drive device in this embodiment all adopt hydraulic motors or electric motors.

[0035] The tunnel impact milling machine of this embodiment has three postures, namely, recovery posture (see Figure 1 , the impact milling mechanism is located on the back of the rotating arm 10), the dome working posture (see Figure 2 ) and inverted working posture (see Figure 3 ).

[0036] When adjusting from the recovery posture to the arch working posture, the rotating shaft 8 is driven to rotate by the rotary drive device 9, so that the rotating arm 10 rotates, the hydraulic telescopic mechanism b6 is contracted, the rotating arm 10 is pulled up, and then the oil cylinder in the telescopic rotating arm 15 is extended. At the same time, the rotary drive device drives the rotating seat 16 to rotate, and the rotary power device a and the rotary power device b are activated, and the impact milling mechanism bypasses the bucket 14 and is adjusted to the upper side of the bucket 14, so that the digging teeth of the bucket 14 abut against the bearing seat 17. When the rock on the top of the tunnel is broken by the impact milling mechanism, the bearing seat 17 bears the force to ensure the rock breaking effect. When adjusting from the arch working posture to the recovery posture, the reverse action is sufficient.

[0037] When adjusting from the recovery posture to the inverted arch working posture, the rotating seat 16 is driven to rotate by the rotating drive device, the oil cylinder in the telescopic rotating arm 15 is extended, the rotating power device a and the rotating power device b are activated, and the impact milling mechanism bypasses the bucket 14 and is adjusted to the front side of the bucket 14, so that the bucket 14 abuts against the bearing seat 17. When the rock on the top of the tunnel is crushed by the impact milling mechanism, the bearing seat 17 bears the force to ensure the rock crushing effect. When adjusting from the inverted arch working posture to the recovery posture, the reverse action is sufficient.

[0038] This embodiment can be adjusted to the working posture of the arch or the working posture of the inverted arch first, and the under-excavated rock can be drilled first by the impact milling device, and then impacted and broken. Then the working posture is adjusted to the recovery posture, and the broken rock is shoveled out by the bucket 14. The rock breaking effect is good and the efficiency is high. The impact milling mechanism and the bucket 14 are integrated in one machine. The machine has a high degree of integration, and the posture can be switched according to the use needs. The flexibility is good, and it is suitable for large, medium and small tunnels. The structure is simple and easy to disassemble and assemble. It can not only mill and break rocks, but also excavate and remove ballast, and no additional large machine is required to enter the site.

[0039] Embodiment 2

[0040] like Figure 1-Figure 8 As shown, the tunnel impact milling machine proposed in this embodiment is compared with the first embodiment. In this embodiment, the impact milling assembly includes a mounting frame 18 rotatably arranged on a rotating seat 16, a sliding frame 19 slidably arranged on the mounting frame 18, a propulsion oil cylinder 20 arranged on the mounting frame 18 and connected to the sliding frame 19 at the moving end, and a plurality of groups of impact milling modules arranged side by side on the sliding frame 19. The sliding frame 19 can be pushed forward by the propulsion oil cylinder 20, and the sliding frame 19 drives the impact milling module forward. The impact milling module first drills a hole in the rock and then cracks the rock at the drilled hole.

[0041] like Figure 4As shown, the impact milling module includes a rock drill 21 and a mounting seat arranged on a sliding frame 19, a squeezer 25 slidably arranged on the mounting seat and having a through-channel, and a drill rod 22 connected to the output end of the rock drill 21 and passing through the through-channel. The through-channel supports the drill rod 22 without hindering the rotation of the drill rod 22, and also realizes the positioning of the drill rod 22 and the squeezer 25, so that the squeezer 25 can squeeze and crack the rock at the borehole drilled by the drill rod 22. When the sliding frame 19 moves forward, the rock drill 21 drives the drill rod 22 to rotate, and the drill rod 22 drills a hole in the rock. Then, the squeezer 25 moves toward the borehole, and as the squeezer 25 continues to move, the rock is squeezed and cracked at the borehole.

[0042] like Figure 5 and Figure 6 As shown, the drill rod 22 includes a hexagonal column segment 221, a round rod segment 222 and a drill bit 223 connected in sequence, and an abutment ring 224 arranged on the round rod segment 222, and the round rod segment 222 is an elastic structure. The abutment ring 224 intermittently abuts against the squeezer 25. The round rod segment 222 is always in an elastic deformation state, and the abutment ring 224 will be separated from the squeezer 25. As the drilling continues, the abutment ring 224 will abut against the squeezer 25 again and impact the squeezer 25. Under the reciprocating impact of the abutment ring 224, the squeezer 25 moves back and forth, and the rock is squeezed and broken from the drill hole by impact.

[0043] like Figure 7 As shown, the squeezer 25 includes an integrally connected sliding seat 251 and a squeeze head 252, and the squeeze head 252 has an insertion barrel and two triangular blades symmetrically arranged on both sides of the insertion barrel. The outer end of the insertion barrel is conical, which can be squeezed into the drill hole smoothly, and the drill hole is further squeezed and broken by the triangular blade, and the rock is squeezed up and down. The triangular blade is a three-section structure with a stepped shape and a gradually increasing slope. The cross-sectional size of the three-section structure gradually increases from front to back, so that the rock can be squeezed and cracked in a multi-level progressive manner, further improving the squeezing effect.

[0044] like Figure 5 As shown, the mounting seat includes a detachably connected connecting plate a23 and a connecting plate b24, a self-lubricating copper block arranged on both sides of the sliding seat portion 251 and respectively slidably connected to the connecting plate a23 and the connecting plate b24, and a rubber pad arranged between the connecting plate a23 and the sliding frame 19, the connecting plate b24 has a limiting groove for limiting the movable range of the sliding seat portion 251, the abutment ring 224 and the end of the limiting groove limit the movable range of the sliding seat portion 251 to prevent the sliding seat portion 251 from falling off the limiting groove, the sliding seat portion 251 slides smoothly between the connecting plate a23 and the connecting plate b24 through the self-lubricating copper block, and under the impact of the abutment ring 224, the sliding seat portion 251 reciprocates, so that the squeezing head 252 of the squeezer 25 can reciprocate to impact the rock, effectively breaking the rock at the drill hole.

[0045] In this embodiment, the rock is first drilled by the drill rod 22, and then the rock is cracked at the drill hole by the squeezer 25. The round rod segment 222 is always in an elastic deformation state, and the abutment ring 224 is used to impact the squeezer 25. The squeezer 25 reciprocates to perform impact-type squeezing on the rock, and the rock cracking effect is better.

[0046] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A tunnel impact milling machine, comprising an excavator body, an excavating arm mechanism, and a bucket (14) arranged at the end of the excavating arm mechanism, It is characterized in that Also includes: The turning device comprises a turning seat (7) arranged on the excavator body, a rotating shaft (8) rotatably arranged on the turning seat (7) and connected to the digging arm mechanism, and a rotating driving device (9) arranged on the turning seat (7) and drivingly connected to the rotating shaft (8); The impact milling and digging device comprises an impact milling and digging mechanism, a telescopic rotating arm (15) whose two ends are respectively rotatably connected to the impact milling and digging mechanism and the digging arm mechanism, a rotating power device a arranged at one end of the telescopic rotating arm (15) and transmission-connected to the digging arm mechanism, and a rotating power device b arranged at the other end of the telescopic rotating arm (15) and transmission-connected to the impact milling and digging mechanism, wherein the telescopic rotating arm (15) has a built-in oil cylinder for adjusting the length.

2. The tunnel impact milling machine according to claim 1, It is characterized in that The excavator body comprises a crawler chassis (1), a cab and a power device (2) arranged on the crawler chassis (1), a main arm (3) rotatably arranged on the cab and the power device (2), a hydraulic telescopic mechanism a (4) whose two ends are rotatably connected to the cab and the power device (2) and the main arm (3), a secondary arm (5) rotatably arranged at the front end of the main arm (3), a hydraulic telescopic mechanism b (6) whose two ends are rotatably connected to the main arm (3) and the secondary arm (5), and a turning seat (7) is arranged on the secondary arm (5); the excavator arm mechanism comprises a rotating arm (10) rotatably connected to a bucket (14), a rotating plate b (13) rotatably connected to the rotating arm (10), a rotating plate a (12) whose two ends are rotatably connected to the rotating plate b (13) and the bucket (14), and a hydraulic telescopic mechanism c (11) whose two ends are rotatably connected to the rotating arm (10) and the rotating plate a (12), a rotating shaft (8) is connected to the rotating arm (10), and the rotating power device a is transmission-connected to the rotating arm (10).

3. The tunnel impact milling machine according to claim 1, It is characterized in that The telescopic rotating arm (15) comprises a plurality of mounting cylinders which are slidably connected in sequence, and the oil cylinder is arranged in the mounting cylinder at one end and connected to the mounting cylinder at the other end.

4. The tunnel impact milling machine according to claim 1, It is characterized in that The impact milling mechanism comprises a rotating seat (16) rotatably connected to a telescopic rotating arm (15), a load-bearing seat (17) arranged on the rotating seat (16) and capable of being abutted by the digging teeth of a bucket (14), an impact milling assembly rotatably arranged on the rotating seat (16), and a rotating driving device arranged on the rotating seat (16) and driving the impact milling assembly to rotate, wherein a rotating power device b is transmission-connected to the rotating seat (16).

5. The tunnel impact milling machine according to claim 4, It is characterized in that The rotary drive device (9), the rotary power device a, the rotary power device b and the rotation drive device all adopt hydraulic motors or electric motors.

6. The tunnel impact milling machine according to claim 4, It is characterized in that The impact milling assembly comprises a mounting frame (18) rotatably arranged on a rotating seat (16), a sliding frame (19) slidably arranged on the mounting frame (18), a propulsion cylinder (20) arranged on the mounting frame (18) and having a movable end connected to the sliding frame (19), and a plurality of impact milling modules arranged side by side on the sliding frame (19).

7. The tunnel impact milling machine according to claim 6, It is characterized in that The impact milling module comprises a rock drill (21) and a mounting seat arranged on a sliding frame (19), a squeezer (25) slidably arranged on the mounting seat and having a penetration channel, and a drill rod (22) connected to the output end of the rock drill (21) and passing through the penetration channel.

8. The tunnel impact milling machine according to claim 7, It is characterized in that The drill rod (22) comprises a hexagonal column segment (221), a round rod segment (222) and a drill bit (223) which are connected in sequence, and an abutment ring (224) arranged on the round rod segment (222). The abutment ring (224) intermittently abuts against the squeezer (25). The round rod segment (222) is an elastic structure.

9. The tunnel impact milling machine according to claim 8, It is characterized in that The squeezer (25) comprises a sliding seat portion (251) and a squeeze head portion (252) which are integrally connected. The squeeze head portion (252) comprises an extrusion barrel portion and two triangular blade portions symmetrically arranged on both sides of the extrusion barrel portion. The triangular blade portions are stepped and have a three-section structure with a gradually increasing slope. The cross-sectional dimensions of the three-section structure gradually increase from front to back.

10. The tunnel impact milling machine according to claim 9, It is characterized in that The mounting seat comprises a detachably connected connecting plate a (23) and a connecting plate b (24), self-lubricating copper blocks arranged on both sides of the sliding seat portion (251) and respectively slidably connected to the connecting plate a (23) and the connecting plate b (24), and a rubber pad arranged between the connecting plate a (23) and the sliding frame (19), and the connecting plate b (24) has a limiting groove for limiting the movable range of the sliding seat portion (251).

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