Crushing device for small-section tunnel excavation

Abstract

The invention belongs to the technical field of tunnel excavation, and particularly relates to a crushing device for small-section tunnel excavation, which comprises a base frame, a drilling structure is arranged at the upper end of the base frame, and a crushing structure is arranged in the drilling structure; the drilling structure comprises a connecting shaft, and the connecting shaft is slidably connected to the upper end of the base frame; the rotating frame is rotationally connected to the surface of the connecting shaft; and the control panel is rotationally connected to the surface of the rotating frame, and a drilling cutter is arranged on the surface of the control panel. By arranging a placing frame, before tunnel excavation, explosives are placed into the placing frame, then the section of a tunnel is drilled, after drilling is completed, the placing frame containing the explosives is left in a hole, and then when a connecting plate moves to make contact with the inner wall, away from the placing frame, of a sliding cylinder, an extension spring can release elastic force; the device assists in propelling the explosive into the hole, so that after drilling is completed, the explosive can automatically and accurately enter the deepest position of the hole.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel excavation, in particular to a crushing device for excavating a small-section tunnel. Background Art

[0002] A small-section tunnel is a type of tunnel engineering, usually referring to a tunnel with a smaller diameter or width. During the tunnel excavation process, if hard rock layers or other difficult-to-excavate materials are encountered, a crushing device is required to perform crushing operations.

[0003] A patent application with publication number 202323365199.1 discloses a tunnel rock crushing device, including a crushing mechanism, wherein the crushing mechanism includes a rotating motor, a drill rod is arranged on the rotating motor, and also includes a base and a turntable structure rotatably arranged on the base. The crushing device solves the problem that the drilling depth cannot be accurately controlled, which may easily cause insufficient drilling depth, resulting in incomplete rock crushing and affecting the crushing effect, or the drilling depth is too deep, which may damage the equipment or cause faults such as drill rod breakage or tunnel instability.

[0004] There are still some problems in the actual application of the above scheme. When using the above-mentioned crushing device to crush the tunnel, it is necessary to use a drill rod in advance to drill holes at equal intervals on the cross-section of the tunnel. Then, after the drilling is completed, the drill rod is pulled out, and a tubular explosive is placed at the location of the hole by mechanical or manual means. However, when the drill hole is pulled out, some drilling debris is likely to remain in the hole, thereby affecting the placement of the explosive. In addition, when placing the explosive, not only a separate machine is required, but also the hole needs to be positioned so that the explosive can accurately enter the hole, which is very cumbersome.

[0005] To this end, the present invention provides a crushing device for small-section tunnel excavation. 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 problem is: a crushing device for small-section tunnel excavation described in the present invention includes a base frame, the upper end of the base frame is provided with a drilling structure, and the interior of the drilling structure is provided with a crushing structure; the drilling structure includes: a connecting shaft, the connecting shaft is slidably connected to the upper end of the base frame; a rotating frame, the rotating frame is rotatably connected to the surface of the connecting shaft; a control plate, the control plate is rotatably connected to the surface of the rotating frame, and the surface of the control plate is provided with a drilling cutter; the crushing structure includes: a sliding cylinder, the sliding cylinder is slidably connected to the interior of the connecting shaft, and the upper and lower surfaces of the sliding cylinder are provided with a second sliding groove; a placing frame, the placing frame is arranged on the One end of the sliding cylinder, and the lower end of the placement frame is provided with an opening, and explosives are placed inside the placement frame, and the explosives are tubular; a connecting plate, the connecting plate is slidably connected to the inside of the sliding cylinder, the upper end of the connecting plate is slidably connected to an upper sliding block, and the lower end of the connecting plate is slidably connected to a lower sliding block, and both the upper sliding block and the lower sliding block slide on the inner wall of the second slide groove, and the upper sliding block is connected to the lower sliding block; a first slide groove, the first slide groove is opened at the upper end of the inner wall of the connecting shaft, and the upper sliding block is slidably connected to the inner wall of the first slide groove; a clamping groove, the clamping groove is opened at one end of the inner wall of the connecting shaft close to the rotating frame, and the lower sliding block is clamped with the clamping groove during operation.

[0008] Preferably, the drilling structure also includes a driving motor, which is arranged at the upper end of the base frame, and a first coil spring is provided at the connection between the control plate and the rotating frame; the crushing structure also includes: a telescopic rod, which is arranged at one end of the connecting plate; a lifting shaft, which is slidably connected to the inside of the connecting plate, and the upper end of the lifting shaft is connected to the upper sliding block, and the lower end of the lifting shaft is connected to the lower sliding block; a reset spring, which is sleeved on the surface of the lifting shaft; a rotating shaft, which is rotatably connected to one end of the surface of the placing frame close to the opening; a limit plate, which is arranged on the surface of the rotating shaft; and a second coil spring, which is arranged on the surface of the rotating shaft.

[0009] Preferably, a sliding frame is provided at one end of the connecting shaft side wall close to the rotating frame, a fixed plate is slidably connected inside the sliding frame, an abutment spring is provided at one end of the fixed plate, and the other end of the abutment spring is connected to the sliding frame.

[0010] Preferably, one end of the placement frame is slidably connected with an abutment rubber, and the abutment rubber abuts against the explosive.

[0011] Preferably, a tension spring is provided at one end of the sliding cylinder, and the tension spring is connected to the abutting rubber, a connecting arm is provided at one end of the connecting plate, and the connecting arm is rotatably connected to a pulling ring at one end away from the connecting plate, and an arc-shaped opening is opened on the surface of the pulling ring, and the pulling ring is in contact with the tension spring.

[0012] Preferably, both upper and lower ends of the connecting plate are rotatably connected with auxiliary rollers, and the auxiliary rollers are in contact with the second sliding grooves.

[0013] Preferably, a plurality of anti-collision pads are provided on the inner upper end of the placement frame.

[0014] Preferably, a feeding structure for use with the crushing structure is provided at the lower end of the base frame; the feeding structure comprises: a feeding frame, the feeding frame is provided at the lower end of the base frame, and a plurality of the explosives are placed inside the feeding frame; a push plate, the push plate is slidably connected to the inside of the feeding frame; a drive shaft, the drive shaft is rotatably connected to the inside of the feeding frame; a conveyor belt, the conveyor belt is rotatably connected to the surface of the drive shaft, and the conveyor belt is placed at an angle, with the higher end of the conveyor belt close to the push plate; and a placement bar, a plurality of the placement bars are provided on the surface of the conveyor belt.

[0015] Preferably, one end of the push plate is connected to a connecting rod, the end of the connecting rod extending to the outside of the loading frame is provided with a tooth plate, a plurality of adjusting springs are provided inside the tooth plate, one end of the adjusting spring is provided with a tooth block, and a gear is provided at one end of the drive shaft surface close to the tooth block, and the gear is meshed with the tooth block.

[0016] Preferably, an inclined plate is provided inside the loading frame, and a lower end of the inclined plate is close to the conveying crawler.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The crushing device for small-section tunnel excavation described in the present invention provides a placement frame. Before tunnel excavation, explosives are placed inside the placement frame, and then the telescopic rod is started. The telescopic rod can drive the sliding cylinder and the placement frame to move in the direction of the rotating frame. Then, when the lower sliding block moves to the inside of the slot, the telescopic rod can drive the connecting shaft to move together, so as to drill the section of the tunnel. After the drilling is completed, the telescopic rod will drive the connecting shaft to reset. At this time, the connecting plate will slide inside the sliding cylinder, so that the placement frame continues to stay in the hole. Then, when the connecting plate moves to contact the inner wall of the sliding cylinder away from the placement frame, the tension spring will release the elastic force to assist in pushing the explosives into the hole, so that after the drilling is completed, the explosives can automatically and accurately enter the deepest part of the hole.

[0019] 2. The crushing device for small-section tunnel excavation described in the present invention is configured with a loading frame. Since it is necessary to drill holes at equal intervals on the cross-section of the tunnel during tunnel excavation, a plurality of explosives are required. In this case, the plurality of explosives are placed inside the loading frame. The rotation of the conveyor track can drive the explosives to move, thereby automatically entering the placement frame for crushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a three-dimensional diagram of the first embodiment of the present invention;

[0022] Figure 2 is a stereogram of the drilling structure of the present invention;

[0023] Figure 3 It is a position diagram of the rotating frame and the drilling cutter of the present invention;

[0024] Figure 4 It is a position diagram of the sliding cylinder and the placement frame of the present invention;

[0025] Figure 5 yes Figure 4 A partial enlarged view of the middle part;

[0026] Figure 6 is a cross-sectional view of the connecting shaft of the present invention;

[0027] Figure 7 It is a position diagram of the placement frame and the anti-knock pad of the present invention;

[0028] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle;

[0029] Fig. 9 It is a position diagram of the rotating frame and the placement frame of the present invention;

[0030] Fig.10 It is a position diagram of the connecting shaft and the fixing plate of the present invention;

[0031] Fig.11 This is the position diagram of the drilling structure and the loading frame of the present invention

[0032] Fig.12 It is a three-dimensional diagram of the feeding frame of the present invention;

[0033] Fig.13 It is an internal view of the feeding frame of the present invention;

[0034] Fig.14 yes Fig.13 A partial enlarged view of point C in the middle;

[0035] In the figure: 1, base frame; 2, drilling structure; 21, connecting shaft; 22, rotating frame; 23, driving motor; 24, control board; 25, drilling cutter; 26, first coil spring; 3, crushing structure; 301, telescopic rod; 302, sliding cylinder; 303, stretching spring; 304, placing frame; 305, anti-collision pad; 306, connecting plate; 307, upper sliding block; 308, lower sliding block; 309, lifting shaft; 310, reset spring; 311, connecting arm; 312, first slide groove; 313, pulling ring; 31 4. Second slide groove; 315. Limiting plate; 316. Rotating shaft; 317. Second coil spring; 318. Abutting rubber; 319. Slot; 320. Fixed plate; 321. Sliding frame; 322. Abutting spring; 323. Auxiliary roller; 4. Feeding structure; 401. Feeding frame; 402. Conveying crawler; 403. Driving shaft; 404. Placement bar; 405. Gear; 406. Connecting rod; 407. Tooth plate; 408. Tooth block; 409. Tilt plate; 410. Push plate; 411. Adjusting spring; 5. Explosive. DETAILED DESCRIPTION

[0036] 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.

[0037] Embodiment 1

[0038] like Figures 1 to 14As shown, a crushing device for small-section tunnel excavation according to an embodiment of the present invention comprises a base frame 1, a drilling structure 2 is provided at the upper end of the base frame 1, and a crushing structure 3 is provided inside the drilling structure 2; the drilling structure 2 comprises: a connecting shaft 21, the connecting shaft 21 is slidably connected to the upper end of the base frame 1; a rotating frame 22, the rotating frame 22 is rotatably connected to the surface of the connecting shaft 21; a control plate 24, the control plate 24 is rotatably connected to the surface of the rotating frame 22, and a drilling cutter 25 is provided on the surface of the control plate 24; the crushing structure 3 comprises: a sliding cylinder 302, the sliding cylinder 302 is slidably connected to the inside of the connecting shaft 21, and the upper and lower surfaces of the sliding cylinder 302 are provided with a second sliding groove 314; a placing frame 304, the placing frame 304 is arranged at one end of the sliding cylinder 302, and the lower end of the placing frame 304 is opened An opening is provided, and explosive 5 is placed inside the placement frame 304, and the explosive 5 is tubular; a connecting plate 306, which is slidably connected to the inside of the sliding cylinder 302, and an upper sliding block 307 is slidably connected to the upper end of the connecting plate 306, and a lower sliding block 308 is slidably connected to the lower end of the connecting plate 306, and both the upper sliding block 307 and the lower sliding block 308 slide on the inner wall of the second slide groove 314, and the upper sliding block 307 is connected to the lower sliding block 308; a first slide groove 312, which is arranged at the upper end of the inner wall of the connecting shaft 21, and the upper sliding block 307 is slidably connected to the inner wall of the first slide groove 312; a clamping groove 319, which is arranged at one end of the inner wall of the connecting shaft 21 close to the rotating frame 22, and the lower sliding block 308 is clamped with the clamping groove 319 during operation.

[0039] Specifically, the scheme is a crushing device for small-section tunnel excavation, which is mainly used for tunnel excavation. When in use, the base frame 1 is first moved to the inside of the tunnel so that the connecting shaft 21 is perpendicular to the tunnel section, and then the explosive 5 is placed from the opening at the lower end of the placement frame 304, and the connecting plate 306 is started. The connecting plate 306 will slide in the direction of the rotating frame 22 inside the sliding cylinder 302, and when the connecting plate 306 moves to contact the inner wall of the sliding cylinder 302 close to the placement frame 304, the connecting plate 306 will drive the sliding cylinder 302 to move together, and the placement frame 304 will also be driven to move together. When the upper sliding block 307 is no longer in contact with the first sliding groove 312, the upper sliding block 307 is The block 307 will abut against the inner wall of the connecting shaft 21, thereby moving downward, and the lower sliding block 308 will be stuck in the inside of the card slot 319 at this time. When the sliding cylinder 302 continues to move, the connecting shaft 21 will also be driven to move together, and then the rotating frame 22 connected to the connecting shaft 21 will contact the tunnel section. At this time, the control board 24 is started, and the control board 24 will drive the surface drilling tool 25 to rotate, and the rotating frame 22 is started at this time. The rotating frame 22 will also rotate on the surface of the connecting shaft 21, and as the connecting shaft 21 continues to move toward the tunnel section, a hole will be drilled in the tunnel section at this time, and then after the tunnel section is drilled, the connecting plate 3 is started again. 06, the connecting plate 306 will move in the direction away from the tunnel section, and when moving, since the lower sliding block 308 is stuck in the slot 319, the connecting shaft 21 will be directly driven by the connecting plate 306 to reset, and the connecting plate 306 at this time slides on the inner wall of the sliding cylinder 302, and since the mass of the placement frame 304 and the sliding cylinder 302 is large, the sliding cylinder 302 and the placement frame 304 will not move in the absence of traction or small traction. When the placement frame 304 abuts against the control plate 24, the control plate 24 will rotate, so that the placement frame 304 is exposed in the hole, and then the connecting plate 306 moves away from the sliding cylinder 302. When the inner wall of one end of the placement frame 304 is in contact, the sliding cylinder 302 will also be reset, and the explosive 5 will remain in the hole. Then, after the connecting shaft 21 is reset, the sliding cylinder 302 has not been reset. Since the connecting plate 306 is still being reset, the lower sliding block 308 at the lower end of the connecting plate 306 will be pulled out of the slot 319, so that the sliding cylinder 302 can drive the placement frame 304 to slide inside the connecting shaft 21. After the reset is finally completed, the drilling of the next hole can be carried out. When the tunnel section is completed with equally spaced holes, the explosive 5 is detonated to complete a distance of tunnel excavation. Then, the excavation of the tunnel of the next construction section can be carried out in sequence.

[0040] like Figures 1 to 9As shown, the drilling structure 2 also includes a driving motor 23, which is arranged at the upper end of the base frame 1, and a first coil spring 26 is provided at the connection between the control panel 24 and the rotating frame 22; the crushing structure 3 also includes: a telescopic rod 301, which is arranged at one end of the connecting plate 306; a lifting shaft 309, which is slidably connected to the inside of the connecting plate 306, and the upper end of the lifting shaft 309 is connected to an upper sliding block 307, and the lower end of the lifting shaft 309 is connected to a lower sliding block 308; a reset spring 310, which is sleeved on the surface of the lifting shaft 309; a rotating shaft 316, which is rotatably connected to one end of the surface of the placing frame 304 close to the opening; a limit plate 315, which is arranged on the surface of the rotating shaft 316; a second coil spring 317, which is arranged on the surface of the rotating shaft 316.

[0041] Specifically, when the explosive 5 is placed from the opening at the lower end of the placement frame 304, the explosive 5 will first contact the limit plate 315. At this time, the limit plate 315 will rotate with the rotating shaft 316 as the axis, so that the explosive 5 can enter the interior of the placement frame 304. Then the second coil spring 317 will release the elastic force, so that the limit plate 315 will reset, thereby supporting the explosive 5, and when drilling work is required, the drive motor 23 is started, and the drive motor 23 can drive the telescopic rod 301 to move, so as to perform the drilling work, and when the upper sliding block 307 slides inside the first sliding groove 312, the reset spring 310 is in a relaxed state, and when the lower sliding block 308 is stuck in the inside of the slot 319, the reset spring 310 will be tight, so when the lower sliding block 308 is pulled out of the slot 319, the reset spring 310 will release the elastic force, and finally the upper sliding block 307 continues to slide inside the first sliding groove 312.

[0042] like Fig.10 As shown, a sliding frame 321 is provided at one end of the side wall of the connecting shaft 21 close to the rotating frame 22, and a fixed plate 320 is slidably connected inside the sliding frame 321. An abutment spring 322 is provided at one end of the fixed plate 320, and the other end of the abutment spring 322 is connected to the sliding frame 321.

[0043] Specifically, by setting a fixed plate 320, when the sliding cylinder 302 and the placement frame 304 move close to the rotating frame 22, if the moving direction of the sliding cylinder 302 is offset, the fixed plate 320 will slightly abut the sliding cylinder 302 through the abutment spring 322 at one end, so that the sliding cylinder 302 continues to remain parallel to the connecting shaft 21.

[0044] like Figures 1 to 9 As shown, one end of the placement frame 304 is slidably connected with a contact rubber 318 , and the contact rubber 318 contacts the explosive 5 .

[0045] Specifically, by setting the abutment rubber 318, when the drilling is completed and the placement frame 304 is exposed inside the hole, the abutment rubber 318 is started and the abutment rubber 318 will move toward the direction of the explosive 5, and finally assist the explosive 5 to push the placement frame 304, so that the explosive 5 can remain inside the hole.

[0046] like Figures 1 to 9 As shown, a tension spring 303 is provided at one end of the sliding cylinder 302, and the tension spring 303 is connected to the abutting rubber 318, a connecting arm 311 is provided at one end of the connecting plate 306, and the connecting arm 311 is rotatably connected to the end away from the connecting plate 306 with a pulling ring 313, and an arc-shaped opening is opened on the surface of the pulling ring 313, and the pulling ring 313 is in contact with the tension spring 303.

[0047] Specifically, by setting the pulling ring 313, when the explosive 5 needs to be placed in the hole, the connecting plate 306 will move in the direction away from the placing frame 304, and in the process of movement, the pulling ring 313 will pull the tension spring 303 to make the tension spring 303 gradually tighten, and since the placing frame 304 and the sliding cylinder 302 have a large mass, the sliding cylinder 302 will not move at this time. When the deformation of the tension spring 303 reaches the maximum value, since the pulling ring 313 is still moving at this time, and an arc-shaped opening is opened on the surface of the pulling ring 313, and the pulling ring 313 also rotates at one end of the connecting arm 311, the pulling ring 313 will be separated from the tension spring 303 at this time, so that the abutting rubber 318 will abut against the explosive 5.

[0048] like Figures 1 to 5 As shown, both upper and lower ends of the connecting plate 306 are rotatably connected with auxiliary rollers 323 , and the auxiliary rollers 323 are in contact with the second sliding grooves 314 .

[0049] Specifically, by providing the auxiliary roller 323 , when the connecting plate 306 slides inside the sliding cylinder 302 , the auxiliary roller 323 will contact the inner wall of the second sliding groove 314 , so that the sliding of the connecting plate 306 is smoother.

[0050] like Figure 7 As shown, a plurality of anti-collision pads 305 are provided at the inner upper end of the placement frame 304 .

[0051] Specifically, by providing the anti-knock pad 305, when the explosive 5 is placed from the opening at the lower end of the placement frame 304, if the placement speed is too fast or the force is too great, the anti-knock pad 305 can buffer the friction between the explosive 5 and the inner wall of the placement frame 304, thereby protecting the appearance of the explosive 5.

[0052] Embodiment 2

[0053] like Figures 11 to 14As shown, compared with Example 1, another embodiment of the present invention is: a feeding structure 4 used in conjunction with a crushing structure 3 is provided at the lower end of the base frame 1; the feeding structure 4 includes: a feeding frame 401, the feeding frame 401 is arranged at the lower end of the base frame 1, and a plurality of explosives 5 are placed inside the feeding frame 401; a pushing plate 410, the pushing plate 410 is slidably connected to the inside of the feeding frame 401; a driving shaft 403, the driving shaft 403 is rotatably connected to the inside of the feeding frame 401; a conveying crawler 402, the conveying crawler 402 is rotatably connected to the surface of the driving shaft 403, and the conveying crawler 402 is tilted, and the higher end of the conveying crawler 402 is close to the pushing plate 410; a placing bar 404, and a plurality of placing bars 404 are arranged on the surface of the conveying crawler 402.

[0054] Specifically, by setting the loading frame 401, when the explosive 5 needs to be placed into the interior of the placement frame 304, when the placement frame 304 is in the initial position, the drive shaft 403 is started to rotate, the drive shaft 403 will drive the conveyor belt 402 to rotate, and the placement strip 404 on the surface of the conveyor belt 402 will drive the tubular explosive 5 to be transported, and then the explosive 5 will be transported to the surface of the push plate 410. At this time, the push plate 410 is started, and the push plate 410 will drive the explosive 5 on the surface to move upward, and finally transfer the explosive 5 to the interior of the placement frame 304.

[0055] like Figures 11 to 14 As shown, one end of the push plate 410 is connected to a connecting rod 406, and the end of the connecting rod 406 extending to the outside of the loading frame 401 is provided with a tooth plate 407, and a plurality of adjusting springs 411 are provided inside the tooth plate 407, and one end of the adjusting spring 411 is provided with a tooth block 408, and a gear 405 is provided on the end of the surface of the driving shaft 403 close to the tooth block 408, and the gear 405 is meshed with the tooth block 408.

[0056] Specifically, by setting the gear 405, when the push plate 410 moves upward to transfer the explosive 5 to the inside of the placement frame 304, the tooth block 408 will also be driven to move upward, and the inclined surface of the tooth block 408 will contact the gear 405. At this time, the tooth block 408 will move toward the inside of the tooth plate 407, and finally the gear 405 will not rotate. When the tooth block 408 is not in contact with the gear 405, the adjustment spring 411 will release the elastic force, so that the tooth block 408 pops out. When the explosive 5 has been installed and the push plate 410 moves downward, the plane of the tooth block 408 will contact the gear 405, so that the gear 405 drives the driving shaft 403 to rotate, so that when the push plate 410 is reset, the explosive 5 is automatically delivered to the surface of the push plate 410.

[0057] like Figures 11 to 14 As shown, an inclined plate 409 is provided inside the loading frame 401 , and a lower end of the inclined plate 409 is close to the conveying crawler 402 .

[0058] Specifically, by providing the inclined plate 409 , the explosives 5 inside the loading frame 401 can be moved toward the conveyor belt 402 , thereby preventing the explosives 5 from accumulating inside the loading frame 401 and being unable to move to the surface of the conveyor belt 402 .

[0059] Working principle: When the device is in use, the base frame 1 is first moved to the inside of the tunnel so that the connecting shaft 21 is perpendicular to the tunnel section, and then an explosive 5 is placed on the surface of the push plate 410, and the push plate 410 is started. The push plate 410 will drive the explosive 5 on the surface to move upward, and then the explosive 5 will contact the limit plate 315. At this time, the limit plate 315 will rotate with the rotating shaft 316 as the axis, so that the explosive 5 can enter the inside of the placement frame 304, and then the second coil spring 317 will release the elastic force, so that the limit plate 315 will reset, thereby holding the explosive 5, and at this time, the drive motor 23 will be started, and the drive motor 23 can drive the telescopic rod 301 to move, and the telescopic rod 301 will drive the connecting plate 30 6, the connecting plate 306 will slide inside the sliding cylinder 302 toward the rotating frame 22, and when the connecting plate 306 moves to contact the inner wall of the sliding cylinder 302 close to the end of the placing frame 304, the connecting plate 306 will drive the sliding cylinder 302 to move together, and the placing frame 304 will also be driven to move together. When the upper sliding block 307 is no longer in contact with the first sliding groove 312, the upper sliding block 307 will abut against the inner wall of the connecting shaft 21, thereby moving downward, and the lower sliding block 308 at this time will be stuck in the inside of the card groove 319. When the sliding cylinder 302 continues to move, the connecting shaft 21 will also be driven to move together, and then the rotating frame 22 connected to the connecting shaft 21 will contact the tunnel section. At this time, the control board 24 is started, and the control board 24 will drive the drilling cutter 25 on the surface to rotate, and the rotating frame 22 is started at this time, and the rotating frame 22 will also rotate on the surface of the connecting shaft 21, and as the connecting shaft 21 continues to move toward the tunnel section, a hole will be drilled in the tunnel section at this time, and then after the hole is drilled in the tunnel section, the driving motor 23 is started again, and the driving motor 23 will drive the connecting plate 306 to move in the direction away from the tunnel section, and during the movement, since the lower sliding block 308 is stuck in the inside of the card slot 319, the connecting shaft 21 at this time will be directly driven by the connecting plate 306 to reset, and the connecting plate 306 at this time slides on the inner wall of the sliding cylinder 302, and since the placement frame 304 The mass of the sliding cylinder 302 is large, so when there is no traction or the traction is small, the sliding cylinder 302 and the placement frame 304 will not move. When the placement frame 304 abuts against the control plate 24, the control plate 24 will rotate, so that the placement frame 304 is exposed in the hole. Then, when the connecting plate 306 moves to contact the inner wall of the sliding cylinder 302 away from the placement frame 304, the sliding cylinder 302 will also be reset at this time, and the explosive 5 will remain in the hole at this time. Then, after the connecting shaft 21 is reset, the sliding cylinder 302 has not been reset yet. Since the connecting plate 306 is still being reset at this time, the lower sliding block 308 at the lower end of the connecting plate 306 will be pulled out of the slot 319.The sliding cylinder 302 can drive the placement frame 304 to slide inside the connecting shaft 21. After the reset is completed, the next hole can be drilled. When the tunnel section is drilled with equal spacing, the explosive 5 is detonated to complete the tunnel excavation of a distance. Then, the next construction section tunnel excavation can be carried out in sequence.

[0060] 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 crushing device for small-section tunnel excavation, characterized in that: It comprises a base frame (1), the upper end of the base frame (1) is provided with a drilling structure (2), and the interior of the drilling structure (2) is provided with a crushing structure (3); The drilling structure (2) comprises: A connecting shaft (21), wherein the connecting shaft (21) is slidably connected to the upper end of the base frame (1); A rotating frame (22), the rotating frame (22) being rotatably connected to the surface of the connecting shaft (21); A control plate (24), the control plate (24) being rotatably connected to the surface of the rotating frame (22), and a drilling tool (25) being provided on the surface of the control plate (24); The crushing structure (3) comprises: A sliding cylinder (302), wherein the sliding cylinder (302) is slidably connected to the interior of the connecting shaft (21), and a second sliding groove (314) is formed on the upper and lower surfaces of the sliding cylinder (302); A placing frame (304), the placing frame (304) is arranged at one end of the sliding cylinder (302), and an opening is provided at the lower end of the placing frame (304), and explosives (5) are placed inside the placing frame (304), and the explosives (5) are in a tubular shape; A connecting plate (306), wherein the connecting plate (306) is slidably connected to the inside of the sliding cylinder (302), an upper sliding block (307) is slidably connected to the upper end of the connecting plate (306), and a lower sliding block (308) is slidably connected to the lower end of the connecting plate (306), and both the upper sliding block (307) and the lower sliding block (308) slide on the inner wall of the second sliding groove (314), and the upper sliding block (307) is connected to the lower sliding block (308); A first sliding groove (312), wherein the first sliding groove (312) is provided at the upper end of the inner wall of the connecting shaft (21), and the upper sliding block (307) is slidably connected to the inner wall of the first sliding groove (312); A clamping groove (319) is provided on an end of the inner wall of the connecting shaft (21) close to the rotating frame (22), and the lower sliding block (308) is clamped with the clamping groove (319) during operation.

2. A crushing device for small-section tunnel excavation according to claim 1, characterized in that: The drilling structure (2) further comprises a driving motor (23), wherein the driving motor (23) is arranged at the upper end of the base frame (1), and a first coil spring (26) is arranged at the connection between the control panel (24) and the rotating frame (22); The crushing structure (3) further comprises: A telescopic rod (301), wherein the telescopic rod (301) is arranged at one end of the connecting plate (306); A lifting shaft (309), wherein the lifting shaft (309) is slidably connected to the inside of the connecting plate (306), and the upper end of the lifting shaft (309) is connected to the upper sliding block (307), and the lower end of the lifting shaft (309) is connected to the lower sliding block (308); A return spring (310), wherein the return spring (310) is sleeved on the surface of the lifting shaft (309); A rotating shaft (316), the rotating shaft (316) being rotatably connected to an end of the surface of the placement frame (304) close to the opening; a limiting plate (315), wherein the limiting plate (315) is arranged on the surface of the rotating shaft (316); A second coil spring (317), wherein the second coil spring (317) is arranged on the surface of the rotating shaft (316).

3. A crushing device for small-section tunnel excavation according to claim 2, characterized in that: A sliding frame (321) is provided at one end of the side wall of the connecting shaft (21) close to the rotating frame (22); a fixed plate (320) is slidably connected inside the sliding frame (321); an abutment spring (322) is provided at one end of the fixed plate (320), and the other end of the abutment spring (322) is connected to the sliding frame (321).

4. A crushing device for small-section tunnel excavation according to claim 3, characterized in that: One end of the placement frame (304) is slidably connected with a contact rubber (318), and the contact rubber (318) contacts the explosive (5).

5. A crushing device for small-section tunnel excavation according to claim 4, characterized in that: A tension spring (303) is provided at one end of the sliding cylinder (302), and the tension spring (303) is connected to the abutting rubber (318). A connecting arm (311) is provided at one end of the connecting plate (306). An end of the connecting arm (311) away from the connecting plate (306) is rotatably connected to a pulling ring (313), and an arc-shaped opening is provided on the surface of the pulling ring (313), and the pulling ring (313) is in contact with the tension spring (303).

6. A crushing device for small-section tunnel excavation according to claim 5, characterized in that: The upper and lower ends of the connecting plate (306) are both rotatably connected to auxiliary rollers (323), and the auxiliary rollers (323) are in contact with the second sliding groove (314).

7. A crushing device for small-section tunnel excavation according to claim 4, characterized in that: A plurality of anti-collision pads (305) are provided at the inner upper end of the placement frame (304).

8. A crushing device for small-section tunnel excavation according to claim 7, characterized in that: A feeding structure (4) for use with the crushing structure (3) is provided at the lower end of the base frame (1); The feeding structure (4) comprises: A loading frame (401), the loading frame (401) being arranged at the lower end of the base frame (1), and a plurality of explosives (5) being placed inside the loading frame (401); A pushing plate (410), the pushing plate (410) being slidably connected inside the loading frame (401); A driving shaft (403), the driving shaft (403) being rotatably connected to the interior of the loading frame (401); A conveying crawler (402), wherein the conveying crawler (402) is rotatably connected to the surface of the driving shaft (403), and the conveying crawler (402) is placed obliquely, and the higher end of the conveying crawler (402) is close to the pushing plate (410); A placement strip (404), wherein a plurality of the placement strips (404) are arranged on the surface of the conveying crawler belt (402).

9. A crushing device for small-section tunnel excavation according to claim 8, characterized in that: One end of the push plate (410) is connected to a connecting rod (406), and the end of the connecting rod (406) extending to the outside of the loading frame (401) is provided with a tooth plate (407), and a plurality of adjusting springs (411) are provided inside the tooth plate (407), and one end of the adjusting spring (411) is provided with a tooth block (408), and a gear (405) is provided at one end of the surface of the drive shaft (403) close to the tooth block (408), and the gear (405) is meshed with the tooth block (408).

10. A crushing device for small-section tunnel excavation according to claim 9, characterized in that: An inclined plate (409) is provided inside the loading frame (401), and a lower end of the inclined plate (409) is close to the conveying crawler (402).

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