A crushing device for small cross-section tunnel excavation

Abstract

The application belongs to the technical field of tunnel excavation, in particular 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, which is slidingly connected to the upper end of the base frame; a rotating frame, which is rotatably connected to the surface of the connecting shaft; and a control plate, which is rotatably connected to the surface of the rotating frame and is provided with a drilling cutter on the surface. The placement frame is arranged. Before tunnel excavation, explosives are placed in the placement frame, and then the cross section of the tunnel is drilled. After drilling is completed, the placement frame containing the explosives will remain in the hole. Then, when the connecting plate moves away from the inner wall of the sliding cylinder and contacts the placement frame, the tension spring will release the elastic force to assist the explosives in being pushed into the hole, so that the explosives can automatically and accurately enter the deepest part of the hole after drilling is completed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tunnel excavation, and in particular relates to a crushing device for small-section tunnel excavation. BACKGROUND

[0002] Small-section tunnels are a type of tunnel engineering, usually referring to tunnels with small diameters or widths. During tunnel excavation, if hard rock layers or other difficult-to-excavate materials are encountered, a crushing device needs to be used for crushing work.

[0003] A patent application with publication number 202323365199.1 discloses a tunnel rock layer crushing device, which comprises a crushing mechanism. The crushing mechanism comprises a rotary motor, and a drill rod is arranged on the rotary motor. The device further comprises a base and a rotating disc structure arranged on the base. The crushing device solves the problem of being unable to accurately control the drilling depth, thereby easily causing insufficient drilling depth, which may lead to incomplete rock crushing, affecting the crushing effect, or excessively deep drilling depth, which may damage the equipment or cause the drill rod to break or other faults, or tunnel instability.

[0004] The above-mentioned scheme still has some problems in actual application. When the crushing device is used for tunnel crushing work, it is necessary to use a drill rod to drill holes at equal intervals on the section of the tunnel in advance, and then pull out the drill rod after the drilling is completed. A tubular explosive is placed in the hole by mechanical or manual means. However, when the drill rod is pulled out, some drilling debris is easily left in the hole, thereby affecting the placement of the explosive. In addition, when placing the explosive, a separate machine is needed to position the hole so that the explosive can accurately enter the hole, which is very cumbersome.

[0005] Therefore, the application provides a crushing device for small-section tunnel excavation. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: the 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 provided 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 work.

[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 return spring, which is sleeved on the surface of the lifting shaft; a rotating shaft, which is rotatably connected to one end of the placement frame surface 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 to an abutting rubber, and the abutting 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 an end of the connecting plate away from a pulling ring, and an arc-shaped opening is provided 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 groove.

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

[0014] Preferably, the lower end of the base frame is provided with a feeding structure used in conjunction with the crushing structure; the feeding structure includes: 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, and the higher end of the conveyor belt is close to the push plate; 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, and the end of the connecting rod extending to the outside of the loading frame is provided with a tooth plate, and a plurality of adjusting springs are provided inside the tooth plate, and one end of the adjusting spring is provided with a tooth block, and the end of the drive shaft surface close to the tooth block is provided with a gear, and the gear is meshed with the tooth block.

[0016] Preferably, an inclined plate is provided inside the loading frame, and the 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 toward 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, thereby drilling the cross-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 equipped with a loading frame. Since it is necessary to drill holes at equal intervals on the cross-section of the tunnel during tunnel excavation, multiple explosives are required. At this time, multiple explosives are placed inside the loading frame. The rotation of the conveyor track can drive the explosives to move, thereby automatically moving into the interior of the placement frame for crushing. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 is a perspective view of embodiment 1 of the present invention;

[0022] Figure 2 It is a three-dimensional diagram of the drilling structure of the present invention;

[0023] Figure 3 This is a diagram showing the positions of the rotating frame and the drilling tool 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 This is a diagram showing the positions 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] Figure 9 It is a position diagram of the rotating frame and the placement frame of the present invention;

[0030] Figure 10 It is a position diagram of the connecting shaft and the fixed plate of the present invention;

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

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

[0033] Figure 13 This is an internal view of the loading frame of the present invention;

[0034] Figure 14 yes Figure 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 panel; 25. Drilling cutter; 26. First coil spring; 3. Crushing structure; 301. Telescopic rod; 302. Sliding cylinder; 303. Tension spring; 304. Placement frame; 305. Anti-collision pad; 306. Connecting plate; 307. Upper sliding block; 308. Lower sliding block; 309. Lifting shaft; 310. Return spring; 311. Connecting arm; 312. First slide groove; 313. Pull ring; 314. 4. Second slide; 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. Conveyor track; 403. Drive 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 easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0037] Example 1

[0038] like Figures 1 to 14As shown, a crushing device for small-section tunnel excavation according to an embodiment of the present invention includes 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 includes: 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 includes: 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 provided 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, the connecting plate 306 is slidably connected to the inside of the sliding cylinder 302, the upper end of the connecting plate 306 is slidably connected to an upper sliding block 307, and the lower end of the connecting plate 306 is slidably connected to a lower sliding block 308, 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, the first slide groove 312 is opened 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, the clamping groove 319 is opened 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 work.

[0039] Specifically, the present invention provides a crushing device for small-section tunnel excavation, which is mainly used for excavating tunnels. 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. 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 inside the sliding cylinder 302 toward the direction of the rotating frame 22, and when the connecting plate 306 moves to contact the inner wall of the sliding cylinder 302 near one end of 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 slide groove 312, the upper sliding block 307 is in contact with the first slide groove 312. 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. 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 inside of the card 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 when there is no traction or the traction is small. When the placement frame 304 abuts against the control plate 24, the control plate 24 will rotate, thereby exposing the placement frame 304 to 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 yet reset. 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 from 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 drilled with equal intervals, the explosive 5 is detonated, and the tunnel excavation of a distance is completed. Then, the tunnel excavation 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 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, 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 placement frame 304 near 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 around the rotating shaft 316, 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, causing the limit plate 315 to reset, thereby supporting the explosive 5. When drilling work is required, the drive motor 23 is started, and the drive motor 23 can drive the telescopic rod 301 to move, thereby performing the drilling work. When the upper sliding block 307 slides inside the first sliding groove 312, the return spring 310 is in a relaxed state. When the lower sliding block 308 is stuck in the inside of the slot 319, the return spring 310 will be tightened. Therefore, when the lower sliding block 308 is pulled out of the slot 319, the return 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 Figure 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 abutting spring 322 is provided at one end of the fixed plate 320, and the other end of the abutting 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 deviates, 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 to an abutting rubber 318 , and the abutting rubber 318 abuts against 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, and 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 placement frame 304, and during the movement, the pulling ring 313 will pull the tension spring 303 so that the tension spring 303 is gradually tightened, and since the placement 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, 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, so that the abutting rubber 318 abuts against the explosive 5.

[0048] like Figures 1 to 5 As shown, the upper and lower ends of the connecting plate 306 are rotatably connected to 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 , thereby making the sliding of the connecting plate 306 smoother.

[0050] like Figure 7 As shown, a plurality of anti-collision pads 305 are provided on 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 surface of the explosive 5.

[0052] Example 2

[0053] like Figures 11 to 14As shown, in contrast to Example 1, another embodiment of the present invention is as follows: a feeding structure 4 for use with a crushing structure 3 is provided at the lower end of the base frame 1; the feeding structure 4 comprises: a feeding frame 401, the feeding frame 401 is provided 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, a plurality of placing bars 404 are provided on the surface of the conveying crawler 402.

[0054] Specifically, by setting up the loading frame 401, when the explosives 5 need to be placed inside 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 explosives 5 to be transported, and then the explosives 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 explosives 5 on the surface to move upward, and finally transfer the explosives 5 to the inside 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. A gear 405 is provided on the 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.

[0056] Specifically, by setting the gear 405, when the push plate 410 moves upward and transfers 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, causing the tooth block 408 to pop 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, causing the gear 405 to drive the drive 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. The push plate 410 is started, and the push plate 410 will drive the explosive 5 on the surface to move upward, and then the explosive 5 will come into contact with 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, and then the second coil spring 317 will release the elastic force, so that the limit plate 315 is reset, thereby supporting the explosive 5, and at this time the drive motor 23 is 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 moves together, 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 near the end of 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 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, and the explosive 5 will remain in the hole. Then, after the connecting shaft 21 is reset, the sliding cylinder 302 has not yet been reset. 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 drilling of the next hole can be carried out. When the tunnel section is drilled with equal spacing, the explosive 5 is detonated to complete the tunnel excavation of a distance. Then, the excavation of the next construction section of the tunnel can be carried out in sequence.

[0060] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A crushing device for small-section tunnel excavation, characterized by: 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) 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 panel (24), the control panel (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 panel (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 opened at the lower end of the placing frame (304), and explosives (5) are placed inside the placing frame (304), and the explosives (5) are tubular; A connecting plate (306), wherein the connecting plate (306) is slidably connected to the interior of the sliding cylinder (302), the upper end of the connecting plate (306) is slidably connected to an upper sliding block (307), and the lower end of the connecting plate (306) is slidably connected to a lower sliding block (308), 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 card slot (319) is provided on an inner wall of the connecting shaft (21) near one end of the rotating frame (22), and the lower sliding block (308) is engaged with the card slot (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 provided at the connection between the control panel (24) and the rotating frame (22); The crushing structure (3) further comprises: a telescopic rod (301), the telescopic rod (301) being arranged at one end of the connecting plate (306); A lifting shaft (309), wherein the lifting shaft (309) is slidably connected to the interior 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 one end of the surface of the placement frame (304) close to the opening; a limiting plate (315), the limiting plate (315) being arranged on the surface of the rotating shaft (316); A second coil spring (317), wherein the second coil spring (317) is provided 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), and a fixed plate (320) is slidably connected inside the sliding frame (321). An abutting spring (322) is provided at one end of the fixed plate (320), and the other end of the abutting 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 to 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). The connecting arm (311) is rotatably connected to an end of the connecting plate (306) and is connected to a pulling ring (313). 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: The upper inner end of the placement frame (304) is provided with a plurality of anti-collision pads (305).

8. A crushing device for small-section tunnel excavation according to claim 7, characterized in that: The lower end of the base frame (1) is provided with a feeding structure (4) used in conjunction with the crushing structure (3); The feeding structure (4) comprises: A loading frame (401), the loading frame (401) is arranged at the lower end of the base frame (1), and a plurality of explosives (5) are placed inside the loading frame (401); A push plate (410), the push plate (410) being slidably connected to the interior of 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), the conveying crawler (402) is rotatably connected to the surface of the driving shaft (403), and the conveying crawler (402) is placed obliquely, with the higher end of the conveying crawler (402) close to the pushing plate (410); Placement bars (404), a plurality of the placement bars (404) are arranged on the surface of the conveying crawler (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 adjustment springs (411) are provided inside the tooth plate (407), and one end of the adjustment spring (411) is provided with a tooth block (408). The end of the surface of the drive shaft (403) close to the tooth block (408) is provided with a gear (405), 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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