Tunnel impact milling excavator

Abstract

The utility model 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. According to the utility model, rock can be firstly drilled, then is impacted and fractured, and finally is shoveled out through the excavator bucket.

Description

Technical Field

[0001] The utility model relates to the field of tunnel construction, in particular to a tunnel impact milling and excavating machine. Background Technique

[0002] In the mechanical excavation construction of tunnels, small-section tunnels require small equipment or transformation, which affects the efficiency. For extra-large-section tunnels, high requirements are imposed on the mechanical excavation capacity and stability, and faults and potential safety hazards are likely to occur. The mechanical excavation speed is affected by geological conditions, equipment performance and operation level. The complex geological conditions and the time-consuming equipment assembly and commissioning affect the construction efficiency. The purchase and rental costs of tunnel machinery are expensive, and the operation and maintenance costs are high, including energy consumption, component replacement, maintenance, etc.

[0003] During tunnel construction, after blasting the rock, there will still be some rocks that cannot be effectively blasted. The under-excavated rocks affect the next initial lining process and need to be broken before proceeding. The existing equipment cannot accurately break the under-excavated part. If a pure excavator is used to break and excavate the remaining rocks, the construction efficiency is low, and there is currently no effective device for breaking the under-excavated rocks. Content of the Utility Model

[0004] The purpose of the utility model is to address the problems in the background technique and propose a tunnel impact milling and excavating machine that first drills holes in the rock, then impacts and breaks it, and finally shovels it out through a bucket.

[0005] The technical solution of the utility model, the tunnel impact milling and excavating machine, includes an excavator main body, a digging arm mechanism, a flipping device, an impact milling and excavating device, and a bucket provided at the end of the digging arm mechanism; the flipping device includes a flipping seat provided on the excavator main body, a rotating shaft rotatably provided on the flipping seat and connected to the digging arm mechanism, and a rotating drive device provided on the flipping seat and drivingly connected to the rotating shaft; the impact milling and excavating device includes an impact milling and excavating mechanism, a telescopic rotating arm with two ends respectively rotatably connected to the impact milling and excavating mechanism and the digging arm mechanism, a rotating power device a provided at one end of the telescopic rotating arm and drivingly connected to the digging arm mechanism, and a rotating power device b provided at the other end of the telescopic rotating arm and drivingly connected to the impact milling and excavating mechanism. The telescopic rotating arm is internally provided with an oil cylinder for adjusting the length.

[0006] Preferably, the excavator main body includes a crawler chassis, a cab and a power device arranged on the crawler chassis, a main arm rotatably arranged on the cab and the power device, a hydraulic telescopic mechanism a with two ends respectively rotatably connected to the cab and the power device and the main arm, a sub-arm rotatably arranged at the front end of the main arm, a hydraulic telescopic mechanism b with two ends respectively rotatably connected to the main arm and the sub-arm, and a flip seat arranged on the sub-arm; the digging 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 with two ends respectively rotatably connected to the rotating plate b and the bucket, and a hydraulic telescopic mechanism c with two ends respectively rotatably connected to the rotating arm and the rotating plate a, a rotating shaft is connected to the rotating arm, and a rotating power device a is in transmission connection with the rotating arm.

[0007] Preferably, the telescopic rotating arm includes a plurality of mounting cylinders sequentially slidingly connected, and an oil cylinder is arranged in one end mounting cylinder and connected to the other end mounting cylinder.

[0008] Preferably, the impact milling and digging mechanism includes a rotating seat rotatably connected to the telescopic rotating arm, a 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 a rotating power device b is in transmission connection with the rotating seat.

[0009] Preferably, the rotating driving device, the rotating power device a, the rotating power device b and the rotating driving device all adopt hydraulic motors or electric motors.

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

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

[0012] Preferably, the drill rod includes a hexagonal prism section, a round rod section and a drill bit connected in sequence, and an abutting ring arranged on the round rod section, the abutting ring intermittently abuts on the squeezing breaker, and the round rod section is an elastic structure.

[0013] Preferably, the squeezing breaker includes a sliding seat part and a squeezing head integrally connected, the squeezing head has a squeezing-in cylinder part and two triangular knife parts symmetrically arranged on both sides of the squeezing-in cylinder part, the triangular knife parts are stepped structures with gradually increasing slopes, and the cross-sectional dimensions of the stepped structures gradually increase from front to back.

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

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model can first be adjusted to the crown working posture or the invert working posture. The overexcavated rock is first drilled by the impact milling and excavation device and then broken by impact. Then it is adjusted from the working posture to the recovery posture, and the broken rock is shoveled out by the bucket. It has good rock breaking effect, high efficiency and good flexibility. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of adjusting the impact milling and excavation device to the recovery posture in an embodiment of the utility model;

[0018] Figure 2 It is a schematic structural diagram of the crown working posture in an embodiment of the utility model;

[0019] Figure 3 It is a schematic structural diagram of the invert working posture in an embodiment of the utility model;

[0020] Figure 4 It is a schematic structural diagram of the impact milling and excavation device in an embodiment of the utility model;

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

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

[0023] Figure 7 It is a schematic structural diagram of the squeezing breaker;

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

[0025] Reference numerals: 1, crawler chassis; 2, cab and power unit; 3, main boom; 4, hydraulic telescopic mechanism a; 5, auxiliary boom; 6, hydraulic telescopic mechanism b; 7, swivel base; 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 rotary arm; 16, swivel seat; 17, load-bearing seat; 18, mounting bracket; 19, sliding bracket; 20, propulsion cylinder; 21, rock drill; 22, drill pipe; 221, hexagonal prism section; 222, round rod section; 223, drill bit; 224, abutting ring; 23, connecting plate a; 24, connecting plate b; 25, squeezing device; 251, sliding seat part; 252, squeezing head part. Detailed implementation mode

[0026] Embodiment 1

[0027] As Figures 1-8 shown, the tunnel impact milling and excavation machine proposed in this embodiment includes an excavator main body, a boom mechanism, a flipping device, an impact milling and excavation device, and a bucket 14 provided at the end of the boom mechanism.

[0028] The flipping device includes a swivel base 7 provided on the excavator main body, a rotating shaft 8 rotatably provided on the swivel base 7 and connected to the boom mechanism, and a rotary drive device 9 provided on the swivel base 7 and drivingly connected to the rotating shaft 8. The rotary drive device 9 drives the rotating shaft 8 to rotate, and the rotating shaft 8 drives the boom mechanism to rotate to adjust the orientation of the boom mechanism.

[0029] The impact milling and excavation device includes an impact milling and excavation mechanism, a telescopic rotary arm 15 with both ends rotatably connected to the impact milling and excavation mechanism and the boom mechanism respectively, a rotary power device a provided at one end of the telescopic rotary arm 15 and drivingly connected to the boom mechanism, and a rotary power device b provided at the other end of the telescopic rotary arm 15 and drivingly connected to the impact milling and excavation mechanism. The telescopic rotary arm 15 is internally provided with an oil cylinder for adjusting the length.

[0030] The excavator main body includes a crawler chassis 1, a cab and power unit 2 provided on the crawler chassis 1, a main boom 3 rotatably provided on the cab and power unit 2, a hydraulic telescopic mechanism a 4 with both ends rotatably connected to the cab and power unit 2 and the main boom 3 respectively, an auxiliary boom 5 rotatably provided at the front end of the main boom 3, a hydraulic telescopic mechanism b 6 with both ends rotatably connected to the main boom 3 and the auxiliary boom 5 respectively, and the swivel base 7 is provided on the auxiliary boom 5. The driver controls the travel of the entire machine and the actions of each mechanism in the cab and power unit 2, adjusts the orientation of the main boom 3 through the hydraulic telescopic mechanism a 4, and adjusts the orientation of the auxiliary boom 5 through the hydraulic telescopic mechanism b 6. In addition, the operation of this machine can also be controlled by remote control, and the length of the main boom 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 vault working posture, the rotary drive device 9 drives the rotary shaft 8 to rotate, causing the rotating arm 10 to rotate, contracting the hydraulic telescopic mechanism b6, pulling up the rotating arm 10, then extending the oil cylinder in the telescopic rotating arm 15, and at the same time, the rotation drive device drives the rotating seat 16 to rotate, and the rotary power device a and the rotary power device b act to bypass the impact milling and excavation mechanism around the bucket 14 and adjust it to the upper side of the bucket 14, so that the cutting teeth of the bucket 14 abut against the bearing seat 17. When breaking the rock at the top of the tunnel through the impact milling and excavation mechanism, the bearing seat 17 bears the force to ensure the rock breaking effect. When adjusting from the vault working posture to the recovery posture, reverse actions can be taken.

[0037] When adjusting from the recovery posture to the invert working posture, the rotation drive device drives the rotating seat 16 to rotate, extends the oil cylinder in the telescopic rotating arm 15, and the rotary power device a and the rotary power device b act to bypass the impact milling and excavation mechanism around the bucket 14 and adjust it to the front side of the bucket 14, so that the bucket 14 abuts against the bearing seat 17. When breaking the rock at the top of the tunnel through the impact milling and excavation mechanism, the bearing seat 17 bears the force to ensure the rock breaking effect. When adjusting from the invert working posture to the recovery posture, reverse actions can be taken.

[0038] This embodiment can first be adjusted to the vault working posture or the invert working posture. The impact milling and excavation device drills holes in the over-excavated rock first and then impacts and breaks it. Then it is adjusted from the working posture to the recovery posture, and the broken rock is shoveled out by the bucket 14. It has a good rock breaking effect and high efficiency. The impact milling and excavation mechanism and the bucket 14 are integrated on one machine, and the integration degree of the machine is high. It can switch postures according to the use needs, has good flexibility, is suitable for large, medium and small tunnels, has a simple structure, is convenient for disassembly and assembly, can not only mill and excavate rocks but also excavate and clean ballast, and does not require another large machine to enter the site.

[0039] Embodiment 2

[0040] As Figures 1-8 shown, for the tunnel impact milling and excavator proposed in this embodiment, compared with Embodiment 1, in this embodiment, the impact milling and excavation assembly includes a mounting frame 18 rotatably arranged on the 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 with its moving end connected to the sliding frame 19, and multiple groups of impact milling and excavation modules arranged side by side on the sliding frame 19. The propulsion oil cylinder 20 can push the sliding frame 19 forward, the sliding frame 19 drives the impact milling and excavation modules to move forward, and the impact milling and excavation modules first drill holes in the rock and then crack the rock at the drilled holes.

[0041] As Figure 4As shown in the figure, the impact milling and excavation module includes a rock drill 21 and a mounting seat arranged on the sliding frame 19, a squeezing breaker 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, does not prevent the rotation of the drill rod 22, and also realizes the positioning of the drill rod 22 and the squeezing breaker 25, so that the squeezing breaker 25 can perform rock squeezing and cracking construction at the drilling hole 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 squeezing breaker 25 moves towards the drilling hole. As the squeezing breaker 25 continues to move, the rock is cracked at the drilling hole.

[0042] As Figure 5 and Figure 6 shown in the figure, the drill rod 22 includes a hexagonal prism section 221, a round rod section 222 and a drill bit 223 connected in sequence, and a contact ring 224 arranged on the round rod section 222. The round rod section 222 is an elastic structure. The contact ring 224 intermittently contacts the squeezing breaker 25. The round rod section 222 is always in an elastic deformation state, and the contact ring 224 will disengage from the squeezing breaker 25. As the drilling continues, the contact ring 224 will re-contact the squeezing breaker 25 again, impacting the squeezing breaker 25. Under the reciprocating impact of the contact ring 224, the squeezing breaker 25 moves back and forth, and the rock is squeezed and cracked from the drilling hole by the impact.

[0043] As Figure 7 shown in the figure, the squeezing breaker 25 includes a sliding seat part 251 and a squeezing head part 252 integrally connected. The squeezing head part 252 has a squeezing cylinder part and two triangular knife parts symmetrically arranged on both sides of the squeezing cylinder part. The outer end of the squeezing cylinder part is conical and can smoothly squeeze into the drilling hole. The drilling hole is further squeezed and cracked through the triangular knife parts, and the rock is squeezed and cracked up and down. The triangular knife parts are a three-section structure with a stepped shape and gradually increasing slopes. The cross-sectional dimensions of the three-section structure gradually increase from front to back, so that the rock can be squeezed and cracked in a multi-level progressive manner, further improving the squeezing and cracking effect.

[0044] As Figure 5 shown in the figure, the mounting seat includes a connecting plate a23 and a connecting plate b24 detachably connected, self-lubricating copper blocks arranged on both sides of the sliding seat part 251 and slidably connected to the connecting plate a23 and the connecting plate b24 respectively, 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 movement range of the sliding seat part 251. The contact ring 224 and the end of the limiting groove limit the movement range of the sliding seat part 251 to prevent the sliding seat part 251 from falling off the limiting groove. The sliding seat part 251 smoothly slides between the connecting plate a23 and the connecting plate b24 through the self-lubricating copper blocks. Under the impact of the contact ring 224, the sliding seat part 251 reciprocates, so that the squeezing head part 252 of the squeezing breaker 25 can reciprocally impact the rock, effectively cracking the rock at the drilling hole.

[0045] In this embodiment, the rock is first drilled through the drill pipe 22, and then the rock is cracked at the drilling position by the squeezer 25. The round rod section 222 is always in an elastic deformation state. The abutting ring 224 is used to impact the squeezer 25, and the squeezer 25 reciprocates to impact and crack the rock, resulting in a better rock cracking effect.

[0046] The above has described in detail the embodiments of the present invention in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art to which the present invention pertains.

Claims

1. Tunnel impact milling and excavating machine, including an excavator main body, an excavating arm mechanism and a bucket (14) arranged at the end of the excavating arm mechanism, characterized in that, It further includes: A flipping device, which includes a flipping base (7) arranged on the excavator main body, a rotating shaft (8) rotatably arranged on the flipping base (7) and connected to the digging arm mechanism, and a rotary drive device (9) arranged on the flipping base (7) and drivingly connected to the rotating shaft (8); An impact milling and digging device, which includes an impact milling and digging mechanism, a telescopic rotating arm (15) with two ends respectively rotatably connected to the impact milling and digging mechanism and the digging arm mechanism, a rotary power device a arranged at one end of the telescopic rotating arm (15) and drivingly connected to the digging arm mechanism, and a rotary power device b arranged at the other end of the telescopic rotating arm (15) and drivingly connected to the impact milling and digging mechanism. The telescopic rotating arm (15) is internally provided with an oil cylinder for adjusting the length.

2. The tunnel impact milling and excavating machine according to claim 1, characterized in that, The excavator main body includes 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) with two ends respectively rotatably connected to the cab and the power device (2) and the main arm (3), a sub-arm (5) rotatably arranged at the front end of the main arm (3), a hydraulic telescopic mechanism b (6) with two ends respectively rotatably connected to the main arm (3) and the sub-arm (5). The flipping base (7) is arranged on the sub-arm (5); The digging arm mechanism includes a rotating arm (10) rotatably connected to the digging bucket (14), a rotating plate b (13) rotatably connected to the rotating arm (10), a rotating plate a (12) with two ends respectively rotatably connected to the rotating plate b (13) and the digging bucket (14), and a hydraulic telescopic mechanism c (11) with two ends respectively rotatably connected to the rotating arm (10) and the rotating plate a (12). The rotating shaft (8) is connected to the rotating arm (10), and the rotary power device a is drivingly connected to the rotating arm (10).

3. The tunnel impact milling and excavating machine according to claim 1, characterized in that, The telescopic rotating arm (15) includes multiple sections of mounting cylinders that are sequentially slidably connected. The oil cylinder is arranged in one end mounting cylinder and connected to the other end mounting cylinder.

4. The tunnel impact milling and excavating machine according to claim 1, wherein The impact milling and digging mechanism includes a rotating seat (16) rotatably connected to the telescopic rotating arm (15), a bearing seat (17) arranged on the rotating seat (16) and capable of being abutted by the digging teeth of the digging bucket (14), an impact milling and digging assembly rotatably arranged on the rotating seat (16), and a rotating drive device arranged on the rotating seat (16) and driving the impact milling and digging assembly to rotate. The rotary power device b is drivingly connected to the rotating seat (16).

5. The tunneling impact milling excavator according to claim 4, wherein, The rotary drive device (9), the rotary power device a, the rotary power device b, and the rotating drive device all adopt hydraulic motors or electric motors.

6. The tunneling impact milling machine according to claim 4, characterized in that, The impact milling and digging assembly includes a mounting frame (18) rotatably arranged on the 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 with its moving end connected to the sliding frame (19), and multiple groups of impact milling and digging modules arranged side by side on the sliding frame (19).

7. The tunnel impact milling and excavating machine according to claim 6, wherein The impact milling and digging module includes a rock drill (21) and a mounting seat arranged on the sliding frame (19), a squeezing breaker (25) slidably arranged on the mounting seat and having a penetrating channel, and a drill rod (22) connected to the output end of the rock drill (21) and passing through the penetrating channel.

8. The tunneling impact milling machine according to claim 7, characterized in that, The drill pipe (22) includes a hexagonal prism section (221), a round rod section (222), and a drill bit (223) that are connected in sequence, as well as a butting ring (224) provided on the round rod section (222). The butting ring (224) intermittently butts against the squeezing breaker (25), and the round rod section (222) is an elastic structure.

9. The tunneling impact milling machine according to claim 8, characterized in that, The squeezing breaker (25) includes a sliding seat portion (251) and a squeezing head portion (252) that are integrally connected. The squeezing head portion (252) has a squeezing-in cylinder portion and two triangular knife portions symmetrically arranged on both sides of the squeezing-in cylinder portion. The triangular knife portions are three-section structures with a stepped shape and a gradually increasing slope, and the cross-sectional dimensions of the three-section structures gradually increase from front to back.

10. The tunnel impact milling and excavating machine according to claim 9, wherein, The mounting seat includes a connecting plate a (23) and a connecting plate b (24) that are detachably connected, self-lubricating copper blocks provided on both sides of the sliding seat portion (251) and slidably connected to the connecting plate a (23) and the connecting plate b (24) respectively, and a rubber pad provided between the connecting plate a (23) and the sliding frame (19). The connecting plate b (24) has a limiting groove for defining the movement range of the sliding seat portion (251).

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