Efficient cutting device and process for structure breaking

Abstract

The invention belongs to the technical field of tunnel construction, and particularly relates to a structure breaking efficient cutting device and process. The annular guide rail is fixedly installed on the outer ring of a tunnel portal through bolts. A rotating ring is mounted on the annular guide rail in a sliding manner; a center seat is arranged at the circle center of the rotating ring; a plurality of cross beams are connected between the rotating ring and the center base in a surrounding and bolting mode. A plurality of cutting knives are uniformly arranged on the cross beam; the rotating ring rotates along the annular guide rail to drive the multiple cross beams and the center base to rotate and drive the multiple cutting knives to rotate, and the multiple cutting knives evenly cut the tunnel portal into multiple to-be-broken concrete rings; then, the concrete ring to be broken is broken and shoveled; the cut hole tends to be perfect circle, the inner wall of the hole is smooth and flat, the hole chiseling quality is improved, and the shield tunneling machine can enter a tunnel smoothly and safely; and moreover, after the tunnel portal is divided, the tunnel portal is crushed and shoveled, so that the construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a high-efficiency cutting device and process for structural demolition. Background Art

[0002] Tunnel construction is usually carried out using the shield method, which uses a shield machine to dig and advance underground. The shield machine shell and segments support the surrounding rock to prevent collapse into the tunnel. At the same time, a cutting device is used to excavate the soil in front of the excavation face, and the soil is transported out of the cave by an excavation machine. Then, the soil is pressurized and pushed forward at the rear by a jack, and precast concrete segments are assembled to form a mechanized construction method for the tunnel structure.

[0003] Before the shield machine starts excavation construction, the tunnel entrance needs to be chiseled out to ensure that the shield machine can enter the tunnel smoothly, improve construction efficiency, and ensure construction safety. The existing method of chiseling the shield tunnel entrance is mainly through manual chiseling. Since the diameter of the tunnel entrance is generally large, scaffolding must be set up, and construction workers chisel layer by layer on the scaffolding.

[0004] The opening created by manual chiseling will be uneven, with many sharp protrusions and deviations, which will affect the quality of the opening chiseling and even affect the smooth and safe entry of the shield machine into the tunnel. In addition, the manual chiseling method greatly affects the construction efficiency.

[0005] To this end, the present invention provides a structure breaking and efficient cutting device and process. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the structure breaking and efficient cutting device described in the present invention comprises an annular guide rail; the annular guide rail is fixedly installed to the outer ring of the tunnel opening by bolts; a rotating ring is slidably installed on the annular guide rail; a center seat is arranged at the center of the rotating ring; a plurality of beams are bolted around the rotating ring and the center seat; a plurality of cutting knives are evenly arranged on the beams; the rotating ring rotates along the annular guide rail, driving the plurality of beams and the center seat to rotate, driving the plurality of cutting knives to rotate, and the plurality of cutting knives evenly cut the tunnel opening into a plurality of concrete rings to be broken; then, the concrete rings to be broken are crushed and removed; so that the excavated opening approaches a perfect circle, and the inner wall of the opening is smooth and flat, thereby improving the quality of the opening excavation, which is conducive to the smooth and safe entry of the shield machine into the tunnel; and after the tunnel opening is divided, it is crushed and removed, thereby improving the construction efficiency.

[0008] Preferably, the outer ring of the rotating ring is fixedly connected with a gear ring; a No. 1 motor is arranged below the annular guide rail; the output shaft of the No. 1 motor is fixedly connected with a No. 1 gear; the No. 1 gear is meshed with the gear ring; the No. 1 motor drives the No. 1 gear to rotate, drives the gear ring to rotate, and drives the rotating ring to rotate along the annular guide rail, providing sufficient power for the rotation of the cutting knife.

[0009] Preferably, the middle cross-section of the crossbeam is convex; a No. 1 fixing plate is bolted to the side of the crossbeam away from the tunnel entrance; the No. 1 fixing plate matches the shape of the crossbeam; slots are provided on both sides of the No. 1 fixing plate; sliding columns are slidably installed inside the slots; the ends of the two sliding columns close to the tunnel entrance are bolted to the cutting knife; the side of the sliding column and the side close to the No. 1 fixing plate are fixedly connected with a spur rack; a transmission rod is rotatably installed on the middle part of the No. 1 fixing plate away from the crossbeam; the two ends of the transmission rod are fixedly connected with a No. 2 gear; the No. 2 gear is meshed with the spur rack; the middle part of the No. 1 fixing plate is fixedly connected with a No. 2 motor on the side away from the crossbeam; the middle outer ring of the transmission rod and the output shaft of the No. 2 motor are fixedly connected with a bevel gear; the two bevel gears are meshed; the cutting knife rotates to cut deeply into the tunnel entrance, thereby completing the cutting work of the tunnel entrance.

[0010] Preferably, a positioning through groove is opened in the middle of the slot; a vertical groove is opened in the middle of the sliding column; the vertical groove is aligned with the positioning through groove; a positioning plug is inserted into the interior of the positioning through groove; the positioning plug passes through the vertical groove; the positioning plug passes through the positioning through groove and the vertical groove, so that the sliding column can slide stably inside the slot, thereby improving the stability of the cutting knife and thus improving the quality of tunnel opening excavation.

[0011] Preferably, a slot is provided on the side of one end of the cutting knife close to the tunnel entrance; a wear-resistant blade head is provided inside the slot; the cutting knife and the wear-resistant blade head are locked by bolts; the wear-resistant blade head surrounds the outer periphery of the cutting knife; by installing a wear-resistant blade head on the cutting knife, the service life of the cutting knife is effectively improved, and it is convenient for the staff to replace the wear-resistant blade head.

[0012] Preferably, multiple pairs of electric picks are evenly arranged on the crossbeam; each pair of the electric picks are symmetrically arranged on both sides of the crossbeam; the movement trajectory of the cutting knife and the movement trajectory of the electric pick are alternately arranged; the output end of the electric pick is fixedly connected to an extension rod; the end of the extension rod away from the electric pick is bolted to an impact shovel; the blade of the impact shovel is provided with a tooth groove; a No. 2 fixing plate is bolted to the side of the crossbeam away from the tunnel entrance; the No. 2 fixing plate matches the shape of the crossbeam; a shell is provided on both sides of the No. 2 fixing plate; the electric pick is slidably installed inside the shell; the extension rod slides through the outer wall of the shell; the end of the shell away from the impact shovel is fixedly connected to an electric push rod; the piston rod of the electric push rod is fixedly connected to the electric pick; the impact shovel rotates and impacts along the concrete ring to be broken, thereby crushing and removing the concrete ring to be broken, thereby further improving the work efficiency.

[0013] Preferably, both sides of the No. 2 fixing plate are fixed with vertical plates; a plurality of mounting grooves are evenly provided on the vertical plates; a plurality of locking bolts are evenly fixed to a side of the shell close to the vertical plate; the locking bolts penetrate the mounting grooves; a pair of clamping blocks are arranged in the middle of the mounting grooves; the two clamping blocks are located on both sides of the locking bolts; both sides of the clamping blocks are fixed with rubber buffer pads, and the rubber buffer pads are in contact with the side walls of the mounting grooves; a buffer spring is fixed between a side of the clamping block away from the locking bolts and the inner wall of the mounting groove; the buffering and shock absorption of the buffer springs and the rubber buffer pads effectively reduces the vibration of the electric pick and improves the effect of crushing and removing the concrete ring.

[0014] Preferably, a screw hole is opened in the middle of the center seat; a screw rod is installed on the internal thread of the screw hole; a support plate is rotatably installed on the end of the screw rod close to the tunnel entrance; a plurality of cone nails are fixedly connected to a surface of the support plate close to the tunnel entrance; thereby improving the overall stability of the annular guide rail, the cross beam and the center seat, and then improving the stability of the tunnel entrance excavation.

[0015] Preferably, a structure breaking high-efficiency cutting process, the cutting process adopts the above-mentioned structure breaking high-efficiency cutting device, and the cutting process includes the following steps:

[0016] S11: First, the annular guide rail is fixedly installed on the outer ring of the tunnel opening; a plurality of cross beams and a center seat are installed on the middle of the rotating ring; the screw rod is rotated to push the support plate against the center of the tunnel opening;

[0017] S12: Then, the first fixing plate and the second fixing plate are mounted on the crossbeam so that the circular motion trajectories of the cutting blade and the impact shovel are evenly and alternately arranged;

[0018] S13: Afterwards, the No. 1 motor drives the rotating ring to rotate at a constant speed through the transmission of the No. 1 gear and the gear ring;

[0019] S14: At the same time, the second motor drives the sliding column to push the cutting knife to move toward the tunnel opening through the transmission of the bevel gear, the transmission rod, the second gear and the spur rack, so that the cutting knife performs circular cutting on the tunnel opening; the multiple cutting knives cut multiple circles of cutting grooves on the tunnel opening, forming multiple circles of concrete rings to be broken;

[0020] S15: Finally, multiple concrete rings are cleaned one by one.

[0021] Preferably, the cleaning work in S15 includes the following steps:

[0022] S21: First, the second motor is controlled to reverse, so that the cutting knife is separated from the tunnel opening;

[0023] S22: Then, the electric push rod pushes the electric pick and the impact shovel to impact the concrete ring to be broken, and the electric pick drives the impact shovel to impact the concrete ring to be broken, so that the concrete ring to be broken is broken and removed, and a concrete column is left in the center of the tunnel entrance;

[0024] S23: Finally, the cutting device is dismantled, the concrete column is knocked out, and the chiseling work of the tunnel entrance is completed.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. The invention discloses a high-efficiency cutting device and process for breaking a structure, comprising an annular guide rail, a rotating ring, a center seat, a crossbeam and a cutting knife; the annular guide rail is fixed to the outer ring of the tunnel opening by bolts, and the crossbeam is evenly distributed between the rotating ring and the center seat, so that the center seat is located at the center of the rotating ring; the rotating ring rotates along the annular guide rail, driving a plurality of crossbeams and the center seat to rotate, driving a plurality of cutting knives to rotate, and the plurality of cutting knives evenly cut the tunnel opening into a plurality of concrete rings to be broken; then, the concrete rings to be broken are crushed and removed; so that the excavated opening approaches a perfect circle, and the inner wall of the opening is smooth and flat, thereby improving the quality of the opening excavation, and facilitating the shield machine to enter the tunnel smoothly and safely; and after the tunnel opening is divided, it is crushed and removed, thereby improving the construction efficiency.

[0027] 2. The present invention describes an efficient cutting device and process for structure breaking, comprising a shell, an electric push rod, an electric pick, an extension rod and an impact shovel; after a plurality of concrete rings to be broken are cut out of the tunnel entrance, the electric push rod pushes the electric pick to slide along the inner wall of the shell, so that the impact shovel contacts the concrete ring to be broken, at this time, the electric pick is started, driving the extension rod to perform reciprocating impact motion, driving the impact shovel to impact the concrete ring to be broken, so that the concrete ring to be broken is broken; at the same time, the crossbeam drives the electric pick and the impact shovel to rotate, so that the impact shovel rotates and impacts along the concrete ring to be broken, thereby breaking and removing the concrete ring to be broken, thereby further improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 is a stereogram of the present invention;

[0030] Figure 2 is a three-dimensional diagram of the crossbeam in the present invention;

[0031] Figure 3 is a three-dimensional diagram of a cutting knife in the present invention;

[0032] Figure 4 is an exploded view of the cutting knife of the present invention;

[0033] Figure 5 It is a three-dimensional diagram of the second fixing plate in the present invention;

[0034] Figure 6 It is an exploded view of the second fixing plate in the present invention;

[0035] Figure 7 is an exploded view of the housing in the present invention;

[0036] Figure 8 is a three-dimensional diagram of the clamping block in the present invention;

[0037] Fig. 9 is a three-dimensional diagram of the center seat in the present invention;

[0038] Fig.10 is an exploded view of the center seat in the present invention;

[0039] Fig.11 is a flow chart of the cutting process in the present invention;

[0040] Fig.12 It is a flow chart of the cleaning work in the present invention;

[0041] In the figure: 1. annular guide rail; 2. rotating ring; 3. center seat; 4. crossbeam; 5. cutting knife; 6. gear ring; 7. No. 1 motor; 8. No. 1 gear; 9. No. 1 fixing plate; 10. notch; 11. sliding column; 12. spur rack; 13. transmission rod; 14. No. 2 gear; 15. No. 2 motor; 16. bevel gear; 17. positioning through groove; 18. vertical groove; 19. positioning plug plate; 20. slot; 21. wear-resistant cutter head; 22. electric pick; 23. extension rod; 24. impact shovel; 25. No. 2 fixing plate; 26. shell; 27. electric push rod; 28. vertical plate; 29. ​​mounting groove; 30. locking bolt; 31. clamping block; 32. rubber buffer pad; 33. buffer spring; 34. screw hole; 35. screw; 36. support plate; 37. cone nail. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0043] like Figures 1 to 4 As shown, a structure breaking and efficient cutting device according to an embodiment of the present invention comprises an annular guide rail 1; the annular guide rail 1 is fixedly installed to the outer ring of the tunnel opening by bolts; a rotating ring 2 is slidably installed on the annular guide rail 1; a center seat 3 is arranged at the center of the rotating ring 2; a plurality of cross beams 4 are bolted around the rotating ring 2 and the center seat 3; a plurality of cutting knives 5 are evenly arranged on the cross beam 4;

[0044] During operation, the position and diameter of the tunnel opening are determined, the annular guide rail 1 is fixed to the outer ring of the tunnel opening by bolts, multiple beams 4 are evenly fixed to the outer ring of the center seat 3, and then the other end of the beam 4 is bolted to the rotating ring 2, so that the multiple beams 4 are evenly distributed between the rotating ring 2 and the center seat 3, so that the center seat 3 is at the center of the rotating ring 2; the rotating ring 2 rotates along the annular guide rail 1, driving the multiple beams 4 and the center seat 3 to rotate, driving the multiple cutting knives 5 to rotate, and the multiple cutting knives 5 evenly cut the tunnel opening into multiple concrete rings to be broken; then, the concrete rings to be broken are crushed and removed; so that the excavated opening tends to be a perfect circle, and the inner wall of the opening is smooth and flat, which improves the quality of the opening excavation, and is conducive to the smooth and safe entry of the shield machine into the tunnel; and after the tunnel opening is divided, it is crushed and removed, which improves the construction efficiency.

[0045] like Figure 1 As shown, the outer ring of the rotating ring 2 is fixedly connected with a gear ring 6; a No. 1 motor 7 is arranged below the annular guide rail 1; the output shaft of the No. 1 motor 7 is fixedly connected with a No. 1 gear 8; the No. 1 gear 8 is meshed with the gear ring 6;

[0046] During operation, after the annular guide rail 1 is fixed to the outer ring of the tunnel entrance, the No. 1 motor 7 is fixed to the ground, and the No. 1 gear 8 is meshed with the ring gear 6 of the outer ring of the rotating ring 2; the No. 1 motor 7 drives the No. 1 gear 8 to rotate, drives the ring gear 6 to rotate, and drives the rotating ring 2 to rotate along the annular guide rail 1, providing sufficient power for the rotation of the cutting knife 5.

[0047] like Figures 1 to 4 As shown, the middle cross section of the cross beam 4 is convex; a No. 1 fixing plate 9 is bolted to the side of the cross beam 4 away from the tunnel opening; the No. 1 fixing plate 9 matches the shape of the cross beam 4; slots 10 are provided on both sides of the No. 1 fixing plate 9; a sliding column 11 is slidably installed inside the slot 10; the ends of the two sliding columns 11 close to the tunnel opening are bolted to the cutting knife 5; the side of the sliding column 11 and the side close to the No. 1 fixing plate 9 are fixedly connected with a spur rack 12; a transmission rod 13 is rotatably installed on the side of the middle part of the No. 1 fixing plate 9 away from the cross beam 4; the two ends of the transmission rod 13 are fixedly connected with a No. 2 gear 14; the No. 2 gear 14 is meshed with the spur rack 12; the middle part of the No. 1 fixing plate 9 is fixedly connected with a No. 2 motor 15 on the side away from the cross beam 4; the middle outer ring of the transmission rod 13 and the output shaft of the No. 2 motor 15 are fixedly connected with a bevel gear 16; the two bevel gears 16 are meshed;

[0048] During operation, when the cutting knife 5 rotates, the No. 2 motor 15 drives the bevel gear 16 to rotate, and through the meshing transmission of the bevel gear 16, drives the transmission rod 13 to rotate, drives the No. 2 gear 14 at both ends to rotate, drives the spur rack 12 and the sliding column 11 to slide, and pushes the cutting knife 5 to move toward the tunnel entrance, so that the cutting knife 5 rotates and cuts deeply into the tunnel entrance, thereby completing the cutting work of the tunnel entrance.

[0049] like Figure 3 to Figure 4 As shown, a positioning through groove 17 is opened in the middle of the slot 10; a vertical groove 18 is opened in the middle of the sliding column 11; the vertical groove 18 is aligned with the positioning through groove 17; a positioning plug plate 19 is inserted into the interior of the positioning through groove 17; the positioning plug plate 19 passes through the vertical groove 18; the positioning plug plate 19 passes through the positioning through groove 17 and the vertical groove 18, so that the sliding column 11 can slide stably inside the slot 10, thereby improving the stability of the cutting knife 5, thereby improving the quality of the tunnel opening excavation.

[0050] like Figure 3 to Figure 4 As shown, a slot 20 is provided on the side of one end of the cutting knife 5 close to the tunnel entrance; a wear-resistant blade head 21 is provided inside the slot 20; the cutting knife 5 and the wear-resistant blade head 21 are locked by bolts; the wear-resistant blade head 21 surrounds the outer periphery of the cutting knife 5; by installing the wear-resistant blade head 21 on the cutting knife 5, the service life of the cutting knife 5 is effectively improved, and it is convenient for the staff to replace the wear-resistant blade head 21.

[0051] like Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, a plurality of pairs of electric picks 22 are evenly arranged on the crossbeam 4; each pair of the electric picks 22 are symmetrically arranged on both sides of the crossbeam 4; the movement trajectory of the cutting knife 5 and the movement trajectory of the electric picks 22 are arranged alternately; an extension rod 23 is fixedly connected to the output end of the electric pick 22; an impact shovel 24 is bolted to the end of the extension rod 23 away from the electric pick 22; a tooth groove is provided at the blade of the impact shovel 24;

[0052] A second fixing plate 25 is bolted to the side of the crossbeam 4 away from the tunnel entrance; the second fixing plate 25 matches the shape of the crossbeam 4; a shell 26 is provided on both sides of the second fixing plate 25; the electric pick 22 is slidably mounted inside the shell 26; the extension rod 23 slides through the outer wall of the shell 26; an electric push rod 27 is fixedly connected to the end of the shell 26 away from the impact shovel 24; the piston rod of the electric push rod 27 is fixedly connected to the electric pick 22;

[0053] During operation, after a plurality of concrete rings to be broken are cut out at the tunnel entrance, the electric push rod 27 pushes the electric pick 22 to slide along the inner wall of the shell 26, so that the impact shovel 24 contacts the concrete ring to be broken. At this time, the electric pick 22 is started, driving the extension rod 23 to make reciprocating impact motion, driving the impact shovel 24 to impact the concrete ring to be broken, so that the concrete ring to be broken is broken; at the same time, the crossbeam 4 drives the No. 2 fixed plate 25, the shell 26, the electric pick 22 and the impact shovel 24 to rotate, so that the impact shovel 24 rotates and impacts along the concrete ring to be broken, thereby crushing and removing the concrete ring to be broken, thereby further improving the work efficiency.

[0054] like Figures 5 to 8 As shown, both sides of the second fixing plate 25 are fixedly connected with vertical plates 28; a plurality of mounting grooves 29 are evenly provided on the vertical plates 28; a plurality of locking bolts 30 are evenly fixedly connected to a side of the shell 26 close to the vertical plates 28; the locking bolts 30 pass through the mounting grooves 29; a pair of clamping blocks 31 are arranged in the middle of the mounting grooves 29; the two clamping blocks 31 are located on both sides of the locking bolts 30; both sides of the clamping blocks 31 are fixedly connected with rubber buffer pads 32, and the rubber buffer pads 32 are in contact with the side walls of the mounting grooves 29; a buffer spring 33 is fixedly connected between a side of the clamping block 31 away from the locking bolts 30 and the inner wall of the mounting groove 29;

[0055] During operation, when the shell 26 is installed on the vertical plates 28 on both sides of the second fixing plate 25, the locking bolts 30 on the shell 26 penetrate the mounting grooves 29 on the vertical plates 28; the elastic force of the buffer spring 33 pushes the clamping block 31 to contact the locking bolt 30, and the two clamping blocks 31 fix the locking bolt 30 to the middle of the mounting groove 29; after the electric pick 22 is started, high-frequency vibrations will be generated, driving the shell 26 to vibrate, and driving the locking bolts 30 to vibrate. Through the buffering and shock absorption of the buffer spring 33 and the rubber buffer pad 32, the vibration of the electric pick 22 is effectively reduced, and the effect of crushing and removing the concrete ring is improved.

[0056] like Figures 9 and 10 As shown, a screw hole 34 is provided in the middle of the center seat 3; a screw rod 35 is installed on the inner thread of the screw hole 34; a support plate 36 is rotatably installed on one end of the screw rod 35 close to the tunnel opening; a plurality of cone nails 37 are fixedly connected to one side of the support plate 36 close to the tunnel opening;

[0057] During operation, after the annular guide rail 1, the cross beam 4 and the center seat 3 are installed and fixed, the screw 35 is rotated to push the support plate 36 close to the center of the tunnel opening, so that the cone nail 37 is squeezed and contacts the center of the tunnel opening; thereby improving the overall stability of the annular guide rail 1, the cross beam 4 and the center seat 3, and then improving the stability of the tunnel opening excavation.

[0058] like Fig.11 As shown, a structure breaking efficient cutting process, the cutting process adopts the above-mentioned structure breaking efficient cutting device, and the cutting process includes the following steps:

[0059] S11: First, the annular guide rail 1 is fixedly installed to the outer ring of the tunnel opening; a plurality of beams 4 and a center seat 3 are installed to the middle of the rotating ring 2; the screw rod 35 is rotated to push the support plate 36 against the center of the tunnel opening;

[0060] S12: Then, the first fixing plate 9 and the second fixing plate 25 are mounted on the crossbeam 4 so that the circular motion trajectories of the cutting blade 5 and the impact shovel 24 are evenly and alternately arranged;

[0061] S13: Afterwards, the first motor 7 drives the rotating ring 2 to rotate at a constant speed through the transmission of the first gear 8 and the ring gear 6;

[0062] S14: At the same time, the second motor 15 drives the sliding column 11 to push the cutting blade 5 toward the tunnel opening through the transmission of the bevel gear 16, the transmission rod 13, the second gear 14 and the spur rack 12, so that the cutting blade 5 performs circular cutting on the tunnel opening; the multiple cutting blades 5 cut multiple circles of cutting grooves on the tunnel opening, forming multiple circles of concrete rings to be broken;

[0063] S15: Finally, multiple concrete rings are cleaned one by one.

[0064] like Fig.12 As shown, the cleaning work in S15 includes the following steps:

[0065] S21: First, the second motor 15 is controlled to reverse, so that the cutting blade 5 is separated from the tunnel opening;

[0066] S22: Then, the electric push rod 27 pushes the electric pick 22 and the impact shovel 24 to impact the concrete ring to be broken, and the electric pick 22 drives the impact shovel 24 to impact the concrete ring to be broken, so that the concrete ring to be broken is broken and removed, leaving a concrete column in the center of the tunnel entrance;

[0067] S23: Finally, the cutting device is dismantled, the concrete column is knocked out, and the chiseling work of the tunnel entrance is completed.

[0068] Working principle: determine the position and diameter of the tunnel opening, fix the annular guide rail 1 to the outer ring of the tunnel opening by bolts, evenly fix multiple beams 4 to the outer ring of the center seat 3, and then bolt the other end of the beam 4 to the rotating ring 2, so that multiple beams 4 are evenly distributed between the rotating ring 2 and the center seat 3, so that the center seat 3 is at the center of the rotating ring 2; rotate the screw 35 to push the support plate 36 close to the center of the tunnel opening, so that the cone nail 37 is squeezed and contacted to the center of the tunnel opening, thereby improving the overall stability of the annular guide rail 1, the beam 4 and the center seat 3; install the No. 1 fixing plate 9 and the No. 2 fixing plate 25 on the beam 4, so that the circular motion trajectories of the cutting knife 5 and the impact shovel 24 are evenly alternated;

[0069] The No. 1 motor 7 is fixed to the ground, and the No. 1 gear 8 is meshed with the gear ring 6 of the outer ring of the rotating ring 2; the No. 1 motor 7 drives the No. 1 gear 8 to rotate, drives the gear ring 6 to rotate, and drives the rotating ring 2 to rotate along the annular guide rail 1; the No. 2 motor 15 drives the bevel gear 16 to rotate, and through the meshing transmission of the bevel gear 16, drives the transmission rod 13 to rotate, drives the No. 2 gear 14 at both ends to rotate, drives the spur rack 12 and the sliding column 11 to slide, and pushes the cutting knife 5 to move toward the tunnel opening, so that the cutting knife 5 rotates and cuts deeply into the tunnel opening, and multiple cutting knives 5 evenly cut the tunnel opening into multiple concrete rings to be broken;

[0070] Afterwards, the second motor 15 reverses, and through the transmission of the bevel gear 16, the transmission rod 13, the second gear 14 and the spur rack 12, drives the slide column 11 to push the cutting knife 5 away from the tunnel opening, so that the cutting knife 5 is separated from the tunnel opening;

[0071] Then, the electric push rod 27 pushes the electric pick 22 to slide along the inner wall of the shell 26, so that the impact shovel 24 contacts the concrete ring to be broken. At this time, the electric pick 22 is started, driving the extension rod 23 to make a reciprocating impact motion, driving the impact shovel 24 to impact the concrete ring to be broken, so that the concrete ring to be broken is broken; at the same time, the crossbeam 4 drives the second fixing plate 25, the shell 26, the electric pick 22 and the impact shovel 24 to rotate, so that the impact shovel 24 rotates and impacts along the concrete ring to be broken, and the concrete ring to be broken is broken and removed; a concrete column will be left in the center of the tunnel entrance;

[0072] Finally, the cutting device is dismantled and the concrete columns are knocked out to complete the chiseling of the tunnel entrance. The chiseled entrance is a perfect circle and the inner wall is smooth and flat, which improves the quality of chiseling the entrance and facilitates the smooth and safe entry of the shield machine into the tunnel. In addition, after the tunnel entrance is divided, it is crushed and removed, which improves construction efficiency.

[0073] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A structure-breaking and efficient cutting device, characterized in that: The invention comprises an annular guide rail (1); the annular guide rail (1) is fixedly mounted to the outer ring of a tunnel opening by means of bolts; a rotating ring (2) is slidably mounted on the annular guide rail (1); a center seat (3) is arranged at the center of the rotating ring (2); a plurality of cross beams (4) are bolted around the rotating ring (2) and the center seat (3); and a plurality of cutting knives (5) are evenly arranged on the cross beam (4).

2. A structure breaking and efficient cutting device according to claim 1, characterized in that: The outer ring of the rotating ring (2) is fixedly connected with a gear ring (6); a No. 1 motor (7) is arranged below the annular guide rail (1); the output shaft of the No. 1 motor (7) is fixedly connected with a No. 1 gear (8); the No. 1 gear (8) is meshed with the gear ring (6).

3. The structure breaking and efficient cutting device according to claim 1, characterized in that: The middle section of the cross beam (4) is convex; a first fixing plate (9) is bolted to the side of the cross beam (4) away from the tunnel opening; the first fixing plate (9) matches the shape of the cross beam (4); slots (10) are provided on both sides of the first fixing plate (9); sliding posts (11) are slidably installed inside the slots (10); the ends of the two sliding posts (11) close to the tunnel opening are bolted to the cutting blade (5); the side of the sliding post (11) and the side close to the first fixing plate (9) are fixedly connected with a straight rack (11). 2); a transmission rod (13) is rotatably mounted on a side of the middle of the No. 1 fixed plate (9) away from the cross beam (4); two ends of the transmission rod (13) are fixedly connected to a No. 2 gear (14); the No. 2 gear (14) is meshed with the spur rack (12); a No. 2 motor (15) is fixedly connected to a side of the middle of the No. 1 fixed plate (9) away from the cross beam (4); a bevel gear (16) is fixedly connected to the middle outer ring of the transmission rod (13) and the output shaft of the No. 2 motor (15); the two bevel gears (16) are meshed.

4. The structure breaking and efficient cutting device according to claim 3, characterized in that: A positioning through groove (17) is provided in the middle of the notch (10); a vertical groove (18) is provided in the middle of the sliding column (11); the vertical groove (18) is aligned with the positioning through groove (17); a positioning plug plate (19) is inserted into the interior of the positioning through groove (17); and the positioning plug plate (19) passes through the vertical groove (18).

5. The structure breaking and efficient cutting device according to claim 3, characterized in that: A slot (20) is provided on the side surface of one end of the cutting knife (5) close to the tunnel opening; a wear-resistant blade head (21) is provided inside the slot (20); the cutting knife (5) and the wear-resistant blade head (21) are locked by bolts; and the wear-resistant blade head (21) surrounds the outer periphery of the cutting knife (5).

6. The structure breaking and efficient cutting device according to claim 1, characterized in that: A plurality of pairs of electric picks (22) are evenly arranged on the crossbeam (4); each pair of the electric picks (22) are symmetrically arranged on both sides of the crossbeam (4); the movement trajectory of the cutting knife (5) and the movement trajectory of the electric pick (22) are arranged alternately; an extension rod (23) is fixedly connected to the output end of the electric pick (22); an impact shovel (24) is bolted to the end of the extension rod (23) away from the electric pick (22); a tooth groove is provided at the blade of the impact shovel (24); a side of the crossbeam (4) away from the tunnel opening A No. 2 fixing plate (25) is bolted; the No. 2 fixing plate (25) matches the shape of the crossbeam (4); a shell (26) is provided on both sides of the No. 2 fixing plate (25); the electric pick (22) is slidably installed inside the shell (26); the extension rod (23) slides through the outer wall of the shell (26); an electric push rod (27) is fixedly connected to one end of the shell (26) away from the impact shovel (24); the piston rod of the electric push rod (27) is fixedly connected to the electric pick (22).

7. A structure breaking and efficient cutting device according to claim 6, characterized in that: Both sides of the second fixing plate (25) are fixedly connected with vertical plates (28); a plurality of mounting grooves (29) are evenly provided on the vertical plates (28); a plurality of locking bolts (30) are evenly fixedly connected to a side of the shell (26) close to the vertical plate (28); the locking bolts (30) pass through the mounting grooves (29); a pair of clamping blocks (31) are arranged in the middle of the mounting groove (29); the two clamping blocks (31) are located on both sides of the locking bolts (30); both sides of the clamping blocks (31) are fixedly connected with rubber buffer pads (32), and the rubber buffer pads (32) are in contact with the side walls of the mounting groove (29); a buffer spring (33) is fixedly connected between a side of the clamping block (31) away from the locking bolts (30) and the inner wall of the mounting groove (29).

8. The structure breaking and efficient cutting device according to claim 1, characterized in that: A screw hole (34) is provided in the middle of the center seat (3); a screw rod (35) is installed on the inner thread of the screw hole (34); a support plate (36) is rotatably installed on one end of the screw rod (35) close to the tunnel opening; and a plurality of cone nails (37) are fixedly connected to one side of the support plate (36) close to the tunnel opening.

9. A structure-breaking and efficient cutting process, characterized in that: The cutting process adopts a structure breaking high-efficiency cutting device as described in any one of claims 1 to 8, and the cutting process includes the following steps: S11: First, the annular guide rail (1) is fixedly installed on the outer ring of the tunnel opening; a plurality of cross beams (4) and a center seat (3) are installed on the middle of the rotating ring (2); the screw rod (35) is rotated to push the support plate (36) against the center of the tunnel opening; S12: Then, the first fixing plate (9) and the second fixing plate (25) are mounted on the crossbeam (4) so ​​that the circular motion trajectories of the cutting blade (5) and the impact shovel (24) are evenly and alternately arranged; S13: Afterwards, the first motor (7) drives the rotating ring (2) to rotate at a constant speed through the transmission of the first gear (8) and the ring gear (6); S14: At the same time, the second motor (15) drives the sliding column (11) through the bevel gear (16), the transmission rod (13), the second gear (14) and the spur rack (12) to push the cutting knife (5) toward the tunnel opening, so that the cutting knife (5) performs circular cutting on the tunnel opening; the multiple cutting knives (5) cut multiple circles of cutting grooves on the tunnel opening, forming multiple circles of concrete rings to be broken; S15: Finally, multiple concrete rings are cleaned one by one.

10. A structure-breaking and efficient cutting process according to claim 9, characterized in that: The cleaning work described in S15 includes the following steps: S21: First, the second motor (15) is controlled to rotate in the reverse direction, so that the cutting blade (5) is separated from the tunnel opening; S22: Then, the electric push rod (27) pushes the electric pick (22) and the impact shovel (24) to impact the concrete ring to be broken, and the electric pick (22) drives the impact shovel (24) to impact the concrete ring to be broken, so that the concrete ring to be broken is broken and removed, leaving a concrete column in the center of the tunnel entrance; S23: Finally, the cutting device is dismantled, the concrete column is knocked out, and the chiseling work of the tunnel entrance is completed.

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