Laser lofting device for tunnel back break control

Abstract

The invention relates to the technical field of tunnel detection, in particular to a laser lofting device for tunnel back break control, which comprises a box body and a tripod arranged at the bottom end of the box body, a lofting lens, an auxiliary lens and a recording lens are arranged in the box body, a shielding mechanism for shielding the lenses is arranged on the side wall of the box body, and a cleaning frame is slidably connected to the inner side of the box body. An electric telescopic cylinder is fixedly connected to the side wall of the box body, the output end of the electric telescopic cylinder penetrates through the inner side of the box body and is fixedly connected to the side wall of the cleaning frame, and a cleaning roller with cleaning cloth is arranged on the inner side of the cleaning frame. And through the arrangement of the connecting mechanism, the rotating rod can rotate along with the angle adjustment of the auxiliary lens, so that the inclined auxiliary lens can be directly cleaned, the auxiliary lens does not need to be reset, and the convenience performance of the device is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel detection, and in particular to a laser lofting device for controlling over-break and under-break of a tunnel. Background Art

[0002] Tunnels are widely used in infrastructure construction such as hydropower, transportation and water conservancy. Most tunnels are excavated in a straight line. Depending on the mountain terrain, the length can reach several kilometers or even tens of kilometers. In the construction process of tunnels with larger spans, in order to speed up the excavation speed and reduce the cost of excavation, the "drilling and blasting method" is used to advance and expand the tunnel. In order to ensure the excavation quality of the "drilling and blasting method" construction, the drilling position is usually controlled by measuring and laying out before each cycle of excavation and blasting, so a laser laying out device is required.

[0003] The prior art discloses a tunnel cross-section geometry detection device and a detection method with publication number CN112229374B. The tunnel cross-section geometry detection device has the advantages of many measuring points, fast measuring speed and low cost. When the detection device is used to measure the cross-section shape, the flatness and over-excavation and under-excavation of the tunnel can be judged, and the thickness of the lining and the deformation of the tunnel can be calculated. The detection device is suitable for tunnels of various cross-sections.

[0004] Although the above-mentioned device can meet various measurement needs, there are still some defects in the actual measurement process. Since the laser layout device of the tunnel is usually used in tunnel excavation, a large amount of dust will be generated during the tunnel excavation process. In the layout process, dust, debris and pollutants will accumulate on the surface of the lens. If not cleaned, it will lead to a decrease in beam quality and power, and may even cause permanent damage. Dust, oil and other pollutants will adhere to the surfaces of optical components such as lenses and reflectors in the optical path. These pollutants will absorb, scatter or reflect laser energy, resulting in increased energy loss of the laser beam during transmission. Energy loss will not only reduce the output power of the laser, but also affect the focusing effect and processing accuracy of the laser beam. However, the existing laser layout device lacks a self-cleaning mechanism, and after use, the surveyor needs to clean it, which greatly reduces the convenience of the device.

[0005] Therefore, a laser layout device for tunnel over-break and under-break control is proposed to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings existing in the background technology and to propose a laser layout device for controlling over-break and under-break of a tunnel.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a laser layout device for controlling over-excavation and under-excavation of a tunnel, comprising a box body and a tripod arranged at the bottom end of the box body, a layout lens, an auxiliary lens and a recording lens are arranged in the box body, a shielding mechanism for shielding the lens is arranged on the side wall of the box body, a cleaning frame is slidably connected to the inner side of the box body, an electric telescopic cylinder is fixedly connected to the side wall of the box body, an output end of the electric telescopic cylinder passes through the inner side of the box body and is fixedly connected to the side wall of the cleaning frame, a cleaning roller with a cleaning cloth is arranged on the inner side of the cleaning frame, a pair of U-shaped rods are slidably connected through the side wall of the cleaning frame, the end side walls of the U-shaped rods located at the upper end are fixedly connected to the extrusion rod, and the bottom of the other end of the U-shaped rod is fixedly connected to the round rod, a U-shaped groove is provided at the top of the layout lens and the bottom end of the box body, straight grooves are provided at both ends of the U-shaped groove, a winding mechanism for winding up the cleaning cloth is arranged on the side wall of the cleaning frame, and a rotating rod for cleaning the auxiliary lens is arranged on the inner side of the cleaning frame.

[0008] In the above technical solution, further, the layout lens is fixedly connected to the inner side of the box body, and a gap is provided between the bottom end of the layout lens and the bottom end of the box body for the U-shaped rod to slide, a pair of fixed plates are fixedly connected to the top of the layout lens, the auxiliary lens is arranged between the fixed plates, and an adjustment mechanism for adjusting the angle of the auxiliary lens is provided on the fixed plates, the recording lens is fixedly connected between the fixed plates, and a connecting mechanism for driving the rotating rod to rotate simultaneously with the auxiliary lens is provided on the inner side of the box body.

[0009] In the above technical solution, further, both ends of the U-shaped groove are inclined to both sides, the round rods are inserted into the corresponding straight grooves, and the lengths of the two lateral ends of the U-shaped grooves are respectively the same as the widths of the lofting lens and the recording lens.

[0010] The cleaning roller is connected with the cleaning brush by the guide roller, and the cleaning roller is connected with the cleaning brush by the guide roller.

[0011] In the above technical solution, further, the side wall of the push rod is inserted into the inner side of the groove, an upper spring is fixedly connected between the side wall of the top plate and the outer wall of the push rod, a semicircular ball is fixedly connected to the top of the top plate, and a pair of lower springs are fixedly connected between the bottom end of the semicircular ball and the top of the side plate.

[0012] In the above technical solution, further, both upper and lower ends of the cleaning frame are rotatably connected with mounting cylinders, the cleaning roller is inserted between the mounting cylinders, a spiral spring is provided on the inner side of the mounting cylinder located below, one end of the spiral spring is fixedly connected to the bottom end of the cleaning frame, the other end of the spiral spring is fixedly connected to the inner wall of the mounting cylinder, a pair of plug blocks are fixedly connected to the outer wall of the mounting cylinder located below, and a slot matching the plug block is provided on the inner side of the cleaning roller.

[0013] In the above technical solution, further, the connecting mechanism includes a sprocket, the sprocket is rotatably connected to the inner side of the cleaning frame, the side wall of the cleaning frame is fixedly connected to a rear plate, an adjusting rod is rotatably connected through the rear plate, the adjusting rod is fixedly connected to the side wall of the rotating rod, the rotating end of the auxiliary lens is fixedly connected to a connecting rod, a transmission groove is provided on the connecting rod, a chain is transmission-connected between the transmission groove and the sprocket, and the side wall of the adjusting rod passes through the sprocket and the side wall of the cleaning frame.

[0014] In the above technical solution, further, a pair of transmission grooves are opened on the inner side of the sprocket, and a pair of transmission blocks adapted to the transmission grooves are fixedly connected to the outer wall of the adjustment rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can simultaneously drive the cleaning cloth to automatically clean two lenses that are not on the same horizontal line through the arrangement of structures such as the electric telescopic cylinder, the cleaning roller and the U-shaped groove, and through the arrangement of the connecting mechanism, the rotating rod can rotate simultaneously with the angle adjustment of the auxiliary lens, so that the tilted auxiliary lens can be directly cleaned without resetting the auxiliary lens, thereby further improving the convenience of the device.

[0016] 2. Through the setting of the winding mechanism, the present invention can realize automatic winding of the cleaning cloth by squeezing the semi-circular ball through the right-angle block after each cleaning is completed, and driving the push rod to squeeze the semi-spiral groove to drive the winding drum to rotate, thereby replacing the cleaning cloth next to the squeezing rod and the rotating rod, thereby realizing automatic replacement of the cleaning cloth, avoiding affecting the subsequent cleaning of the lens, and further improving the convenience performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front three-dimensional structure of the laser lofting device of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure when the side of the box body of the present invention is opened; Figure 3 The appended Figure 2 A schematic diagram of the partially enlarged structure at center A; Figure 4 It is a schematic diagram of the rear-view stereoscopic structure of the lofting lens and the cleaning frame of the present invention; Figure 5 The appended Figure 4 A schematic diagram of the partially enlarged structure at B in the middle; Figure 6 It is a schematic diagram of the three-dimensional structure of the side of the box body of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the cleaning frame of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the cleaning frame of the present invention when the side is opened; Fig. 9 It is a schematic diagram of the three-dimensional structure of the cleaning frame of the present invention in a top view and in full section; Fig.10 It is a schematic diagram of the full-section three-dimensional structure of a partial side view of the winding drum of the present invention.

[0018] In the figure: 1. box body; 2. tripod; 3. lofting lens; 4. auxiliary lens; 5. recording lens; 6. shielding mechanism; 7. fixing plate; 8. adjustment mechanism; 9. cleaning frame; 10. electric telescopic cylinder; 11. cleaning roller; 12. U-shaped rod; 13. extrusion rod; 14. round rod; 15. U-shaped groove; 16. straight groove; 17. rotating rod; 18. guide roller; 19. winding drum; 20. side plate; 21. semi-spiral groove; 22. vertical groove; 23. top plate; 24. push rod; 25. groove; 26. upper spring; 27. semi-circular ball; 28. lower spring; 29. ​​right-angle block; 30. mounting tube; 31. volute spring; 32. insert block; 33. sprocket; 34. back plate; 35. adjustment rod; 36. connecting rod; 37. transmission block; 38. chain. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] like Figure 1-10A laser layout device for controlling over-break and under-break of a tunnel shown in the figure comprises a box body 1 and a tripod 2 arranged at the bottom end of the box body 1. A layout lens 3, an auxiliary lens 4 and a recording lens 5 are arranged in the box body 1. The layout lens 3 is mainly used to emit a laser beam for the main measurement work, and is responsible for generating the main reference lines or points for the construction personnel to align and position. The auxiliary lens 4 is used to assist the layout lens 3 in more accurate positioning or measurement, and is used to capture more details, or to provide additional references at different distances and angles. The recording lens 5 is mainly used to monitor the measurement process or record the measurement results, or to be connected to a display screen or a camera, so that the operator can view the measurement situation in real time or conduct post-analysis. The side wall of the box body 1 is provided with a shielding mechanism 6 for shielding the lens. The shielding mechanism 6 is mainly composed of a motor and a shielding plate and other structures, which can automatically shield the box body 1 to prevent dust from entering the box body 1 when not in use. It is a mature chassis in the prior art and will not be described in detail here. A cleaning frame 9 is slidably connected to the inside of the box body 1, and an electric telescopic cylinder 10 is fixedly connected to the side wall of the box body 1. The output end of the electric telescopic cylinder 10 passes through the inside of the box body 1 and is fixedly connected to the side wall of the cleaning frame 9. The inside of the cleaning frame 9 is provided with a cleaning frame 9. A cleaning roller 11 of a cleaning cloth, a pair of U-shaped rods 12 are slidably connected through the side wall of the cleaning frame 9, the side wall of the upper end of the U-shaped rod 12 is fixedly connected with a squeezing rod 13, and the bottom of the other end of the U-shaped rod 12 is fixedly connected with a round rod 14, the top of the sample lens 3 and the bottom of the box body 1 are both provided with a U-shaped groove 15, and both ends of the U-shaped groove 15 are provided with a straight groove 16, the side wall of the cleaning frame 9 is provided with a winding mechanism for winding up the cleaning cloth, and the inner side of the cleaning frame 9 is provided with a rotating rod 17 for cleaning the auxiliary lens 4; The layout lens 3 is fixedly connected to the inner side of the box body 1, and a gap is provided between the bottom end of the layout lens 3 and the inner bottom end of the box body 1 for the U-shaped rod 12 to slide. A pair of fixing plates 7 are fixedly connected to the top of the layout lens 3. The auxiliary lens 4 is arranged between the fixing plates 7. The fixing plates 7 are provided with an adjustment mechanism 8 for adjusting the angle of the auxiliary lens 4. The adjustment mechanism 8 is mainly composed of a motor and a rotating shaft and other structures. The angle of the auxiliary lens 4 can be adjusted according to the use requirements. It is a mature technology in the prior art and will not be described in detail here. The recording lens 5 is fixedly connected between the fixing plates 7. A connecting mechanism for driving the rotating rod 17 to rotate with the auxiliary lens 4 is provided on the inner side of the box body 1; Both ends of the U-shaped groove 15 are inclined to both sides, and the round rods 14 are inserted into the corresponding straight grooves 16. The lengths of the lateral ends of the two U-shaped grooves 15 are respectively the same as the widths of the lofting lens 3 and the recording lens 5; When the lens needs to be cleaned during the use of the laser lofting device, the electric telescopic cylinder 10 is controlled to start and drive the cleaning frame 9 to slide inside the box body 1, and at the same time drive the round rod 14 to slide inside the straight groove 16. Then, when the squeezing rod 13 moves in front of the lofting lens 3 and the recording lens 5, the round rod 14 will slide out of the straight groove 16 and slide into the oblique grooves on both sides of the U-shaped groove 15 (because the U-shaped rod 12 can only slide on the cleaning frame 9, and under the squeezing of the oblique grooves on both sides of the U-shaped groove 15, the round rod 14 and the U-shaped rod 12 will be pushed to move), and at the same time drive the squeezing rod 13 to move, and push the cleaning cloth to gradually move in front of the lofting lens 3 and the recording lens 5 (it should be noted here that the cleaning The cloth is an elastic fabric), and then the round rod 14 slides into the lateral end of the U-shaped groove 15. At this time, the cleaning cloth is close to the layout lens 3 and the recording lens 5. Then the round rod 14 slides out from the lateral end of the U-shaped groove 15, and slides out of the oblique groove on the other side of the U-shaped groove 15 and slides into another straight groove 16. In this process, the movement of the cleaning frame 9 will drive the rotating rod 17 and the adjusting rod 35 to move through the rear plate 34, and then under the action of the rotating rod 17, the cleaning cloth will be close to the auxiliary lens 4, thereby realizing automatic cleaning of the layout lens 3, the auxiliary lens 4 and the recording lens 5, which are not on the same horizontal line. Finally, after the cleaning is completed, the electric telescopic cylinder 10 is controlled to reset and the above operation is repeated in the reverse direction.

[0022] In order to be able to automatically replace the used cleaning cloth, the winding mechanism includes a winding drum 19, a pair of side plates 20 are fixedly connected to the side walls of the cleaning frame 9, the winding drum 19 is rotatably connected between the side plates 20, and a guide roller 18 is rotatably connected to the inner side of the cleaning frame 9. The guide roller 18 guides the pulling direction of the cleaning cloth. Four sections of cleaning cloth are wound on the cleaning roller 11. The arrangement of the four sections of cleaning cloth prevents the cleaning cloth from obstructing the normal adjustment of the U-shaped rod 12 and the rotating rod 17, and each section of the cleaning cloth passes through the outer wall of the guide roller 18 and then passes through the outer wall of the squeezing rod 13 or the outer wall of the rotating rod 17. Passing through and being bonded to the outer wall of the winding drum 19 (it should be noted that the two cleaning cloths passing through the outer wall of the rotating rod 17, after passing through the adjusting rod 35, need to overlap at one end and pass through the rotating rod 17 and then be bonded to the winding drum 19, thereby covering the gap between the cleaning cloths on the rotating rod 17, and at the same time avoiding the subsequent winding and replacement, the gap can also be covered to ensure the comprehensive cleaning of the lens), a pair of semi-spiral grooves 21 are opened at the top of the inner side of the winding drum 19, and vertical grooves 22 are opened at the positions between the ends of the semi-spiral grooves 21 on the inner side of the winding drum 19; The top of the side plate 20 at the top is slidably connected with a top plate 23, and the side wall of the top plate 23 is slidably connected with a push rod 24. The top of the vertical groove 22 is provided with an inward groove 25. Through the setting of the groove 25, a step can be provided between the groove 25 and the vertical groove 22, so as to guide the sliding direction of the push rod 24, ensuring that the push rod 24 runs according to the specified trajectory. The connection between the groove 25 and the semi-spiral groove 21 is inclined. The inner side of the box body 1 and away from the top side of the cleaning frame 9 is fixedly connected with a right-angle block 29 with an inclined surface. The push rod 24 The side wall is inserted into the inner side of the groove 25, and an upper spring 26 is fixedly connected between the side wall of the top plate 23 and the outer wall of the push rod 24. The upper spring 26 is provided to facilitate the push rod 24 to be pushed into the groove 25 and run according to the specified trajectory. A semicircular ball 27 is fixedly connected to the top of the top plate 23. The provision of the semicircular ball 27 facilitates the inclined surface of the right-angle block 29 to squeeze the semicircular ball 27 to slide downward more smoothly. A pair of lower springs 28 are fixedly connected between the bottom end of the semicircular ball 27 and the top of the side plate 20. The provision of the lower spring 28 facilitates the semicircular ball 27 to be pushed to quickly reset. When the electric telescopic cylinder 10 is controlled to start the automatic cleaning of the three lenses, when the cleaning is completed, the cleaning frame 9 will be driven to move to the other side of the box body 1. At this time, the semi-circular ball 27 will move to the bottom end of the right-angle block 29, and then the semi-circular ball 27 will be gradually squeezed by the inclined surface of the right-angle block 29 to slide downward, and at the same time, the top plate 23 and the push rod 24 will be driven to slide downward. Since the top plate 23 can only slide up and down, and the push rod 24 is inserted into the groove 25 at this time, it is restricted by the step between the groove 25 and the vertical groove 22 (it should be noted here that the bottom of the groove 25 is an inclined surface, and then the take-up drum 19 can be driven to rotate under the squeezing of the push rod 24 to ensure that the push rod 24 is squeezed into the semi-spiral groove 21). Then, under the downward action of the top plate 23, the push rod 24 is driven to squeeze the take-up drum 19 to rotate, and at the same time, the lower spring 28 is gradually compressed, so that the push rod 24 is squeezed into the semi-spiral groove 21 along the inclined surface of the groove 25, and the upper spring 26 is stretched, thereby driving the take-up drum 19 to rotate; Since the cleaning cloth is adhered to the outer wall of the take-up drum 19, the cleaning cloth will be rolled up under the action of the rotation of the take-up drum 19, thereby pulling the cleaning cloth out of the cleaning roller 11 (at this time, since the cleaning roller 11 is plugged into the mounting drum 30, and since one end of the volute spring 31 is fixed to the mounting drum 30 and the other end is fixed in the housing 1, the volute spring 31 will be gradually compressed), and then the push rod 24 slides out of the semi-spiral groove 21 and slides into the vertical groove 22 on the other side, and at the same time, the semi-circular ball 27 moves to the straight The electric telescopic cylinder 10 is at the bottom of the inclined surface of the corner block 29, and then resets, thereby gradually releasing the squeezing of the semi-circular ball 27, and pushing the semi-circular ball 27 to gradually slide upward and reset under the elastic force of the lower spring 28, while driving the push rod 24 to slide in the vertical groove 22, and then the semi-circular ball 27 is reset, and the push rod 24 moves to the side of the groove 25, and then the side end of the push rod 24 is pushed into the groove 25 under the elastic force of the upper spring 26, and this is repeated to realize the automatic replacement of the used cleaning cloth.

[0023] In order to facilitate the replacement of the cleaning roller 11 after the cleaning cloth is used up, the upper and lower ends of the cleaning frame 9 are rotatably connected with the mounting cylinders 30, the cleaning roller 11 is inserted between the mounting cylinders 30, and a spiral spring 31 is provided on the inner side of the mounting cylinder 30 at the bottom, one end of the spiral spring 31 is fixedly connected to the bottom end of the cleaning frame 9, and the other end of the spiral spring 31 is fixedly connected to the inner wall of the mounting cylinder 30, a pair of plug blocks 32 are fixedly connected to the outer wall of the mounting cylinder 30 at the bottom, and a slot adapted to the plug block 32 is provided on the inner side of the cleaning roller 11; First, by setting the spiral spring 31 and realizing the connection between the cleaning roller 11 and the mounting cylinder 30 through the plug block 32 and the slot, when the take-up cylinder 19 rotates to pull the cleaning cloth out of the cleaning roller 11, the cleaning cloth will be driven to rotate when it is pulled out of the cleaning roller 11, and since the cleaning roller 11 and the mounting cylinder 30 are connected through the plug block 32 and the slot, the mounting cylinder 30 will be driven to rotate. However, one end of the spiral spring 31 is fixed on the mounting cylinder 30 and the other end is fixed in the box body 1, so the spiral spring 31 will be gradually compressed. Then, through the setting of the spiral spring 31, a pulling force can be provided to the cleaning roller 11 to ensure that the cleaning cloth is always in a taut state. When the cleaning cloth is used up, first pull the cleaning cloth out of the cleaning frame 9, then pull out the cleaning cloth wrapped on the take-up drum 19, then open the inspection plate of the cleaning frame 9, and then push the cleaning roller 11 upward to pull the bottom slot out of the plug block 32, then tilt the cleaning roller 11, and then pull the top of the cleaning roller 11 out from the upper mounting tube 30, then repeat the above operation in reverse to install a new cleaning roller 11, and pass the cleaning cloth through the guide roller 18, the squeezing rod 13 and the rotating rod 17 in turn, and finally bond it to the take-up drum 19.

[0024] In order to be able to directly clean the tilted auxiliary lens 4, the connecting mechanism includes a sprocket 33, the sprocket 33 is rotatably connected to the inner side of the cleaning frame 9, and the side wall of the cleaning frame 9 is fixedly connected to a rear plate 34. It should be noted that the width of the rear plate 34 does not exceed the rotating rod 17 to prevent the rear plate 34 from touching the lens. An adjusting rod 35 is rotatably connected to the rear plate 34, and the adjusting rod 35 is fixedly connected to the side wall of the rotating rod 17. The rotating end of the auxiliary lens 4 is fixedly connected to a connecting rod 36, and a transmission groove is provided on the connecting rod 36. A chain 38 is transmission-connected between the transmission groove and the sprocket 33, and the side wall of the adjusting rod 35 passes through the sprocket 33 and the side wall of the cleaning frame 9. A pair of transmission grooves are formed inside the sprocket 33, and a pair of transmission blocks 37 matching the transmission grooves are fixedly connected to the outer wall of the adjustment rod 35; When the adjusting mechanism 8 adjusts the tilt angle of the auxiliary lens 4, the connecting rod 36 will be driven to rotate at the same time, and then the sprocket 33 will be driven to rotate at the same time under the transmission of the transmission groove and the chain 38, and then the adjusting rod 35 will be driven to rotate at the same time under the action of the transmission block 37 and the transmission groove, and then the rotating rod 17 will be driven to rotate synchronously, so as to ensure that the tilted auxiliary lens 4 is cleaned by squeezing the cleaning cloth through the rotating rod 17, and when the electric telescopic cylinder 10 drives the cleaning frame 9 to move, the adjusting rod 35 will be driven to slide on the sprocket 33, but under the action of the transmission block 37 and the transmission groove, it will not affect the cleaning of the auxiliary lens 4 by the rotating rod 17.

[0025] The basic principles, main features and advantages of the present invention are shown and described above.

[0026] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A laser layout device for controlling tunnel over-break and under-break, comprising a housing (1) and a tripod (2) arranged at the bottom end of the housing (1), characterized in that: The box (1) is provided with a sample-laying lens (3), an auxiliary lens (4) and a recording lens (5); a side wall of the box (1) is provided with a shielding mechanism (6) for shielding the lens; a cleaning frame (9) is slidably connected to the inside of the box (1); an electric telescopic cylinder (10) is fixedly connected to the side wall of the box (1); an output end of the electric telescopic cylinder (10) passes through the inside of the box (1) and is fixedly connected to the side wall of the cleaning frame (9); a cleaning roller (11) with a cleaning cloth is provided on the inside of the cleaning frame (9); and the side wall of the cleaning frame (9) passes through the sliding A pair of U-shaped rods (12) are connected, the side walls of the upper ends of the U-shaped rods (12) are fixedly connected to extrusion rods (13), the bottoms of the other ends of the U-shaped rods (12) are fixedly connected to round rods (14), the top of the sample lens (3) and the bottom of the box body (1) are both provided with U-shaped grooves (15), both ends of the U-shaped grooves (15) are provided with straight grooves (16), the side walls of the cleaning frame (9) are provided with a winding mechanism for winding up a cleaning cloth, and the inner side of the cleaning frame (9) is provided with a rotating rod (17) for cleaning the auxiliary lens (4).

2. A laser lofting device for controlling tunnel over-break and under-break according to claim 1, characterized in that: The layout lens (3) is fixedly connected to the inner side of the box body (1), and a gap is provided between the bottom end of the layout lens (3) and the inner bottom end of the box body (1) for the U-shaped rod (12) to slide. A pair of fixing plates (7) are fixedly connected to the top of the layout lens (3). The auxiliary lens (4) is arranged between the fixing plates (7). The fixing plates (7) are provided with an adjustment mechanism (8) for adjusting the angle of the auxiliary lens (4). The recording lens (5) is fixedly connected between the fixing plates (7). A connection mechanism for driving the rotating rod (17) to rotate simultaneously with the auxiliary lens (4) is provided on the inner side of the box body (1).

3. The laser lofting device for controlling overbreak and underbreak of a tunnel according to claim 1, characterized in that: Both ends of the U-shaped groove (15) are inclined toward both sides, the round rods (14) are inserted into corresponding straight grooves (16), and the lengths of the two lateral ends of the U-shaped grooves (15) are respectively the same as the widths of the lofting lens (3) and the recording lens (5).

4. The laser layout device for controlling overbreak and underbreak of a tunnel according to claim 1, characterized in that: The winding mechanism comprises a winding drum (19), a pair of side plates (20) being fixedly connected to the side walls of the cleaning frame (9), the winding drum (19) being rotatably connected between the side plates (20), a guide roller (18) being rotatably connected to the inner side of the cleaning frame (9), four sections of cleaning cloth being wound around the cleaning roller (11), and each section of the cleaning cloth passing through the outer wall of the guide roller (18), and then passing through the outer wall of the squeezing rod (13) or the rotating rod (17) and being bonded to the outer wall of the winding drum (19), and a pair of semi-spiral grooves (21) being opened at the inner top end of the winding drum (19) ), a vertical groove (22) is provided on the inner side of the winding drum (19) at a position close to one end of the semi-spiral groove (21), a top plate (23) is slidably connected to the top of the side plate (20) at the top, a push rod (24) is slidably connected to the side wall of the top plate (23), an inward groove (25) is provided on the top of the vertical groove (22), and the connection between the groove (25) and the semi-spiral groove (21) is inclined, and a right-angle block (29) with an inclined surface is fixedly connected to the top of the side wall of the inner side of the box body (1) away from the cleaning frame (9).

5. The laser lofting device for controlling overbreak and underbreak of a tunnel according to claim 4, characterized in that: The side wall of the push rod (24) is inserted into the inner side of the groove (25); an upper spring (26) is fixedly connected between the side wall of the top plate (23) and the outer wall of the push rod (24); a semicircular ball (27) is fixedly connected to the top of the top plate (23); and a pair of lower springs (28) are fixedly connected between the bottom end of the semicircular ball (27) and the top of the side plate (20).

6. The laser lofting device for controlling overbreak and underbreak of a tunnel according to claim 1, characterized in that: The cleaning frame (9) has mounting cylinders (30) rotatably connected at both upper and lower ends thereof, the cleaning roller (11) being inserted between the mounting cylinders (30), a scroll spring (31) being provided on the inner side of the mounting cylinder (30) located at the bottom, one end of the scroll spring (31) being fixedly connected to the bottom end of the cleaning frame (9), the other end of the scroll spring (31) being fixedly connected to the inner wall of the mounting cylinder (30), a pair of plug blocks (32) being fixedly connected to the outer wall of the mounting cylinder (30) located at the bottom, and a slot matching the plug block (32) being provided on the inner side of the cleaning roller (11).

7. The laser layout device for controlling overbreak and underbreak of a tunnel according to claim 2, characterized in that: The connecting mechanism comprises a sprocket (33), the sprocket (33) being rotatably connected to the inner side of a cleaning frame (9), a rear plate (34) being fixedly connected to the side wall of the cleaning frame (9), an adjusting rod (35) being rotatably connected to the rear plate (34), the adjusting rod (35) being fixedly connected to the side wall of a rotating rod (17), a connecting rod (36) being fixedly connected to the rotating end of the auxiliary lens (4), a transmission groove being provided on the connecting rod (36), a chain (38) being transmission-connected between the transmission groove and the sprocket (33), and a side wall of the adjusting rod (35) being arranged to pass through the sprocket (33) and the side wall of the cleaning frame (9).

8. The laser layout device for controlling overbreak and underbreak of a tunnel according to claim 7, characterized in that: A pair of transmission grooves are formed inside the sprocket (33), and a pair of transmission blocks (37) adapted to the transmission grooves are fixedly connected to the outer wall of the adjustment rod (35).

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