Portable laser scanning equipment based on tunnel detection

Abstract

The invention relates to the technical field of portable laser scanning equipment for tunnel detection, in particular to portable laser scanning equipment for tunnel detection, which comprises a moving box, a storage cavity is formed in the top of the moving box, and a stretching support assembly is arranged at the upper position in the storage cavity. A folding assembly is installed in the stretching supporting assembly, a balance assembly is arranged at the lower position in the storage cavity, a bottom plate is arranged in the storage cavity, a first-stage supporting cylinder is fixedly connected to the top of the bottom plate, a second-stage supporting cylinder is slidably arranged in the first stretching cavity, and a supporting shaft is slidably arranged in the second stretching cavity. Through cooperative operation of the stretching supporting assembly, the folding assembly and the balance assembly, the process of carrying scanning equipment back and forth is omitted, the equipment collision frequency is reduced, the scanning equipment can be rapidly installed, supported and folded by a single person, and meanwhile the automatic leveling effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of portable laser scanning equipment for tunnel detection, and in particular to a portable laser scanning equipment for tunnel detection. Background Art

[0002] When conducting relevant inspections on tunnels, laser scanning equipment is needed to assist in the operation, ensuring clear feedback on the structure inside the tunnel, assisting operators in understanding the situation inside the tunnel, and facilitating subsequent construction work.

[0003] After searching, the publication number is CN117190855A, which discloses a three-dimensional laser scanning detection equipment for railway tunnels, which records "including a detection shell, both sides of the outer wall of the detection shell are fixedly connected to heat sinks, the side walls of the heat sink are fixedly connected to the mounting shell, the bottom of the detection shell is connected to two symmetrical extraction components, the top of the mounting shell is fixedly connected to a plurality of dispersion pipes, the ends of the plurality of dispersion pipes all pass through the heat sink and are fixed and connected to the mounting shell. Because a movable bracket is installed on the fixed sleeve block, and an auxiliary motor and auxiliary fan blades are installed on the movable bracket, the auxiliary fan blades are driven to adjust the air blowing up and down, so that the air blown by the auxiliary fan blades is evenly contacted with the dispersion pipes and condensed downward, thereby conducting heat dissipation to the detection shell, thereby enhancing the heat dissipation of the electronic components inside the detection shell, and increasing the service life of the laser scanner, thereby improving the use effect."

[0004] When the above patent is actually used, the process of picking up the scanning equipment is relatively inconvenient, and multiple operators are required to assist in fixing it during installation. The instrument itself is relatively expensive and heavy. Once it is bumped and damaged, it will not only affect the smooth progress of the scanning operation, but also increase the cost of this scanning work. In addition, when operating on some complex ground, it takes a lot of time to level the instrument, which makes the preparation work less efficient.

[0005] Based on this, the present invention discloses a portable laser scanning device for tunnel detection. Summary of the Invention

[0006] To solve the problems raised in the background art, such as the inconvenience of taking up the scanning device and the need for multiple operators to assist in fixing it during installation, the device itself is relatively expensive and heavy, and once it is damaged by a bump, it will not only affect the smooth progress of the scanning operation but also increase the cost of the scanning operation. In addition, when operating on some complex ground surfaces, it takes a lot of time to level the device, which makes the preparation work less efficient, the present invention provides a portable laser scanning device for tunnel inspection, which includes a mobile box, a storage cavity is opened on the top of the mobile box, a stretching support assembly is provided at the upper part of the storage cavity, a folding assembly is installed in the stretching support assembly, and a balancing assembly is provided at the lower part of the storage cavity; The stretching support assembly includes a base plate, the storage cavity is provided with a base plate inside, the top of the base plate is fixedly connected to a primary support tube, the top of the primary support tube is provided with a first stretching cavity, a secondary support tube is slidably provided in the first stretching cavity, the top of the secondary support tube is provided with a second stretching cavity, the inside of the second stretching cavity is slidably provided with a support shaft, the top of the support shaft is connected to a mounting seat, and the top of the mounting seat is provided with a scanner.

[0007] As a further improvement of the present technical solution, a first lifting groove is symmetrically provided on the inner wall arc surface of the first stretching cavity, a first-level clamping hole is provided on the top of the first lifting groove, and the first-level clamping hole passes through the barrel of the first-level support tube, and a No. 1 telescopic cavity is symmetrically provided on the bottom of the barrel of the second-level support tube, and each of the No. 1 telescopic cavity is connected to a No. 1 limit spring at the end close to the central axis of the second-level support tube, and each of the No. 1 telescopic cavity is provided with a first-level buckle at the end away from the central axis of the second-level support tube, and the other end of each No. 1 limit spring is connected to the first-level buckle at the corresponding position, and the cross-sectional diameter of the No. 1 telescopic cavity is the same as that of the first-level support tube. The cross-sectional diameters of the clamping holes are the same, and a second lifting groove is symmetrically provided on the arc surface of the inner wall of the second stretching cavity. A secondary clamping hole is provided on the top of the second lifting groove, and the secondary clamping hole passes through the barrel of the secondary support cylinder. A No. 2 telescopic cavity is symmetrically provided at the bottom of the barrel of the support shaft, and each of the No. 2 telescopic cavities close to the end of the central axis of the support shaft is connected to a No. 2 limit spring, and each of the No. 2 telescopic cavities away from the central axis of the support shaft is provided with a secondary buckle, and the other end of each No. 2 limit spring is connected to the secondary buckle at the corresponding position, and the cross-sectional diameter of the secondary clamping hole is the same as the cross-sectional diameter of the No. 2 telescopic cavity.

[0008] As a further improvement of the present technical solution, a retraction groove is provided at an equal angle on the outer arc surface of the support shaft, and a first support rod is rotatably installed on the top end surface of the inner wall of the retraction groove, a second support rod is slidably provided in the sleeve cavity inside the first support rod, a third support rod is slidably provided in the sleeve cavity inside the second support rod, and a fourth support rod is slidably provided in the sleeve cavity inside the third support rod, and the lower ends of the rod bodies of the first support rod, the second support rod and the third support rod are all provided with limiting clamping holes, and the upper ends of the rod bodies of the second support rod, the third support rod and the fourth support rod are all equipped with limiting buckles, and the limiting buckles can be clamped in the limiting clamping holes at corresponding positions.

[0009] As a further improvement of the present technical solution, the folding assembly includes a No. 1 bracket, and a No. 1 bracket is opened at the center position of the bottom end face of the inner wall of the second stretching cavity, which drives a connecting hole to be opened on the bottom end face of the No. 1 bracket, and the connecting hole passes through the bottom of the cylinder body of the secondary support cylinder and is connected with the opening space of the first stretching cavity. A No. 2 bracket is opened inside the support shaft body above the No. 2 telescopic cavity, and the center axis of the No. 2 bracket coincides with the center axis of the support shaft. A first magnet is provided inside the No. 1 bracket, and a second magnet is provided inside the No. 2 bracket. The first magnet can adsorb the first-level buckle and move it toward the first support rod, and the second magnet can adsorb the second-level buckle and move it toward the No. 2 bracket.

[0010] As a further improvement of the present technical solution, a vertical pulling hole is provided inside the support shaft, directly above the No. 2 bracket, and the bottom of the vertical pulling hole is connected to the opening space of the No. 2 bracket. A horizontal pulling hole is provided on the vertical inner wall surface of the No. 2 bracket, and the horizontal pulling hole is connected to the vertical pulling hole. A pulling rope is connected to the first magnet, and the top end of the pulling rope is connected to the second magnet. The pulling rope at the top of the second magnet passes through the vertical pulling hole and the horizontal pulling hole inside the support shaft and is inserted into the opening slot of the retractable slot. The top end of the pulling rope is connected to the rod body of the first support rod at the corresponding position.

[0011] As a further improvement of the present technical solution, a spring snap is installed at a lower position on the vertical inner wall of each of the retractable grooves, and a small iron sheet is provided at the corresponding position of the first support rod near the spring snap. After the first support rod is completely retracted into the retractable groove, the small iron sheet on the first support rod contacts the active end of the spring snap.

[0012] As a further improvement of the present technical solution, a pulling rope is connected to the bottom of the first magnet, and the bottom end of the pulling rope extends through the connecting hole at the bottom of the No. 1 bracket and is connected to a small hammer block.

[0013] As a further improvement of the present technical solution, the balancing assembly includes a fixed plate, which is fixedly connected to a lower position inside the storage cavity, a rotating cavity is opened at the center position of the fixed plate, a rotating ball is rotatably installed inside the rotating cavity, the top of the rotating ball is connected to the bottom center position of the base plate through a connecting short shaft, the bottom of the rotating ball is fixedly connected to a connecting rod, and a weight block is fixed to the bottom of the connecting rod, and the bottom end surface of the weight block is higher than the bottom end surface of the storage cavity.

[0014] As a further improvement of the present technical solution, a bidirectional screw rod and a limit rod are respectively installed on the inner wall surface of the storage chamber at both sides of the rotating ball, and the cross-sections of both ends of the bidirectional screw rod and the limit rod are sleeved with moving blocks. A clamping block is fixedly connected to the structural end surface of the moving block close to the rotating ball, and an anti-slip pad is pasted on the active arc surface of the clamping block. A small motor is installed on the structural surface of one side of the moving box, and the output shaft end of the small motor passes through the plate body of the moving box and is connected to the end of the bidirectional screw rod.

[0015] As a further improvement of the present technical solution, a driving device is installed at the bottom of the mobile box, small rollers are installed on both sides of the driving device, an insertion slot is opened on the top end surface of the mobile box, a box cover is provided on the top of the mobile box, an insertion plate is fixed to the bottom of the box cover, and the insertion plate can be inserted into the insertion slot; Compared with the prior art, the present invention has the following beneficial effects: 1. In this portable laser scanning device for tunnel inspection, by cooperating with the stretching support assembly, there is no need to move the scanning device out of the mobile box. By directly applying a pulling force to the mounting base, the scanner can be directly supported on the upper part of the mobile box, eliminating the process of carrying the scanning device back and forth, reducing the frequency of equipment collisions, and a single person can complete the support and fixation of the scanning device.

[0016] 2. In the portable laser scanning device for tunnel detection, through the cooperative operation of the folding assembly, after the fourth support rod, the third support rod and the second support rod are folded into the inside of the first support rod in sequence, the first support rod can be rotated and placed into the inside of the folding groove. With the cooperation of the pulling rope and the small hammer block, the first magnet and the second magnet are restored to their original positions, and suction is generated again between the first-level buckle and the second-level buckle, removing the limiting effect on the secondary support tube and the support shaft, so that the support shaft falls into the inside of the second stretching cavity, and the secondary support tube falls into the inside of the first stretching cavity. When the first support rod is folded, the limiting force of the secondary support tube and the support shaft is removed at the same time, so that the stretching support assembly can be quickly folded, with a simple structure and easy operation.

[0017] 3. In this portable laser scanning device used for tunnel detection, the automatic leveling effect during scanner installation is achieved through the coordinated operation of the balancing components. Under the clamping action of the clamping block, the scanner will not swing, ensuring the stability of the scanner during operation and facilitating the smooth progress of subsequent scanning operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the scanner support state of the present invention; Figure 3 This is a schematic diagram of the structure of the first-level buckle and the second-level buckle of the present invention when they are not in operation; Figure 4 This is a schematic diagram of the structure of the first-level buckle and the second-level buckle in operation of the present invention; Figure 5 This is a schematic diagram of the internal structure of the No. 1 telescopic chamber of the present invention; Figure 6 It is a structural schematic diagram of the cross section of the primary support tube of the present invention; Figure 7 This is a structural schematic diagram of the first support rod of the present invention in an operating state; Figure 8 It is a structural schematic diagram of the folding assembly of the present invention.

[0019] The meaning of each number in the figure is: 1. Moving box; 2. Storage chamber; 3. Bottom plate; 4. First-level support cylinder; 5. First stretching chamber; 6. First lifting slot; 7. First-level clamping hole; 8. Second-level support cylinder; 9. Second stretching chamber; 10. Second lifting slot; 11. Second-level clamping hole; 12. Support shaft; 13. Mounting seat; 14. Scanner; 15. No. 1 telescopic chamber; 16. No. 1 limit spring; 17. First-level buckle; 18. No. 1 bracket; 19. No. 2 telescopic chamber; 20. No. 2 limit spring; 21. Second-level buckle; 22. No. 2 bracket; 23. First magnet; 24. Second magnet; 25. Pull rope; 26. Small hammer block; 27. Retractable slot; 28. First support rod; 29. ​​Second support rod; 30. Third support rod; 31. Fourth support rod; 32. Limit buckle; 33. Spring snap; 34. Fixed plate; 35. Rotating cavity; 36. Rotating ball; 37. Connecting rod; 38. Weight block; 39. Bidirectional screw; 40. Limit rod; 41. Moving block; 42. Clamping block; 43. Small motor; 44. Driving device; 45. Small roller; 46. Insertion slot; 47. Box cover; 48. Insertion plate. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] For this purpose, the present invention provides a portable laser scanning device for tunnel detection. Figure 1-Figure 7 As shown, it includes a mobile box 1, a storage cavity 2 is opened on the top of the mobile box 1, a stretching support assembly is provided at the upper position inside the storage cavity 2, a folding assembly is installed in the stretching support assembly, and a balancing assembly is provided at the lower position inside the storage cavity 2; The stretching support assembly includes a base plate 3, which is provided inside the storage chamber 2. A primary support tube 4 is fixed to the top of the base plate 3. A first stretching chamber 5 is provided on the top of the primary support tube 4. A secondary support tube 8 is slidably provided in the first stretching chamber 5. A second stretching chamber 9 is provided on the top of the secondary support tube 8. A support shaft 12 is slidably provided inside the second stretching chamber 9. A mounting seat 13 is connected to the top of the support shaft 12. A scanner 14 is installed on the top of the mounting seat 13. The scanner 14 can rotate horizontally on the mounting seat 13. The shaft of the secondary support tube 8 is at the same height as the opening of the first stretching chamber 5, and the opening height of the support shaft 12 is the same as the opening space of the second stretching chamber 9.

[0022] A first lifting groove 6 is symmetrically provided on the inner wall arc surface of the first stretching cavity 5, a first-level clamping hole 7 is provided on the top of the first lifting groove 6, and the first-level clamping hole 7 passes through the barrel of the first-level support tube 4, and a No. 1 telescopic cavity 15 is symmetrically provided on the bottom of the barrel of the second-level support tube 8. The end of each No. 1 telescopic cavity 15 close to the central axis of the second-level support tube 8 is connected to a No. 1 limit spring 16, and the end of each No. 1 telescopic cavity 15 away from the central axis of the second-level support tube 8 is provided with a first-level buckle 17, and the other end of each No. 1 limit spring 16 is connected to the first-level buckle 17 at the corresponding position. The cross-sectional diameter of the No. 1 telescopic cavity 15 is the same as the cross-sectional diameter of the first-level clamping hole 7. A second lifting groove 10 is symmetrically provided on the arc surface of the inner wall of the second stretching cavity 9, a secondary clamping hole 11 is provided on the top of the second lifting groove 10, and the secondary clamping hole 11 passes through the barrel of the secondary support cylinder 8, and a No. 2 telescopic cavity 19 is symmetrically provided at the bottom of the barrel of the support shaft 12. The end of each No. 2 telescopic cavity 19 close to the central axis of the support shaft 12 is connected to a No. 2 limit spring 20, and the end of each No. 2 telescopic cavity 19 away from the central axis of the support shaft 12 is provided with a secondary buckle 21, and the other end of each No. 2 limit spring 20 is connected to the secondary buckle 21 at the corresponding position, and the cross-sectional diameter of the secondary clamping hole 11 is the same as the cross-sectional diameter of the No. 2 telescopic cavity 19. Both the first-level buckle 17 and the second-level buckle 21 are made of metal. When the first-level buckle 17 is not in operation, the end of the first-level buckle 17 is located inside the first lifting groove 6 and can slide along the inside of the first lifting groove 6. When the second-level buckle 21 is not in operation, the end of the second-level buckle 21 is located inside the second lifting groove 10 and can slide along the inside of the second lifting groove 10. When the first-level buckle 17 is inserted into the first-level card hole 7, the No. 1 limit spring 16 does not deform. When the second-level buckle 21 is inserted into the second-level card hole 11, the No. 2 limit spring 20 does not deform.

[0023] A retracting groove 27 is provided at an equal angle on the outer arc surface of the support shaft 12, and a first support rod 28 is rotatably installed on the top end surface of the inner wall of the retracting groove 27. A second support rod 29 is slidably provided in the sleeve cavity inside the first support rod 28, a third support rod 30 is slidably provided in the sleeve cavity inside the second support rod 29, and a fourth support rod 31 is slidably provided in the sleeve cavity inside the third support rod 30. The lower ends of the rod bodies of the first support rod 28, the second support rod 29 and the third support rod 30 are all provided with limiting card holes, and the upper ends of the rod bodies of the second support rod 29, the third support rod 30 and the fourth support rod 31 are all equipped with limiting buckles 32, which can be clamped in the limiting card holes at corresponding positions.

[0024] During operation, through the structural design of the stretching support assembly, before the scanning operation is carried out, the scanner 14 can be raised by applying a pulling force to the mounting seat 13. During this process, the mounting seat 13 drives the support shaft 12 and the secondary support cylinder 8 to rise in turn. During the process of the support shaft 12 rising, the secondary buckle 21 slides to the top of the second lifting slot 10, and the secondary buckle 21 enters the opening range of the secondary clamping hole 11. At this time, the secondary buckle 21 has a tendency to move toward the secondary clamping hole 11. Under the limiting action of the second lifting slot 10 and the secondary clamping hole 11, the support shaft 12 stops moving upward inside the second stretching cavity 9. During the process of the secondary support cylinder 8 rising, the first-level buckle 17 slides to the top of the first lifting slot 6, and the first-level buckle 17 enters the opening range of the first-level clamping hole 7. At this time, the first-level buckle 17 has a tendency to move toward the first-level clamping hole 7. Under the limiting action of the primary clamping hole 7 and the primary buckle 17, the secondary support cylinder 8 stops moving upward inside the first stretching cavity 5, so that the scanner 14 can be directly pulled up in the mobile box 1 without moving and transporting, to avoid bumps. After the support shaft 12 is completely pulled out, horizontal pressing pressure is applied to the secondary support cylinder 8 inside the retracting groove 27, and the first support rod 28 pops out from the retracting groove 27. With the cooperation of the retracting assembly, the primary buckle 17 enters the primary clamping hole 7, and at the same time the secondary buckle 21 enters the secondary clamping hole 11, so as to limit the secondary support cylinder 8 and the rod body of the support shaft 12, so that the scanner 14 can be stably supported. Subsequently, the fourth support rod 31, the third support rod 30 and the second support rod 29 inside the first support rod 28 are pulled out in turn and supported on the ground, further strengthening the stability of the scanner 14 during operation.

[0025] For further information, see Figure 3-Figure 5 、 Figure 7As shown, the folding assembly includes a No. 1 bracket 18, and a No. 1 bracket 18 is opened at the center position of the bottom end face of the inner wall of the second stretching cavity 9, which drives a connecting hole to be opened on the bottom end face of the No. 1 bracket 18, and the connecting hole passes through the bottom of the cylinder body of the secondary support cylinder 8 and is connected with the opening space of the first stretching cavity 5. A No. 2 bracket 22 is opened inside the rod body of the support shaft 12 above the No. 2 telescopic cavity 19, and the center axis of the No. 2 bracket 22 coincides with the center axis of the support shaft 12. A first magnet 23 is provided inside the No. 1 bracket 18, and a second magnet 24 is provided inside the No. 2 bracket 22. The first magnet 23 can adsorb the first-level buckle 17 and move it toward the first support rod 28, and the second magnet 24 can adsorb the second-level buckle 21 and move it toward the No. 2 bracket 22. When the first magnet 23 is located inside the No. 1 bracket 18, the No. 1 limit spring 16 is in a compressed state and generates a reaction force, and at this time the end of the first-level buckle 17 is located inside the first lifting slot 6. When the second magnet 24 is located inside the No. 2 bracket 22, the No. 2 limit spring 20 is in a compressed state and generates a reaction force, and at this time the end of the second-level buckle 21 is located inside the second lifting slot 10.

[0026] A vertical pulling hole is opened inside the support shaft 12, just above the No. 2 bracket 22, and the bottom of the vertical pulling hole is connected to the opening space of the No. 2 bracket 22. A horizontal pulling hole is opened on the vertical inner wall surface of the No. 2 bracket 22, and the horizontal pulling hole is connected to the vertical pulling hole. A pulling rope 25 is connected to the first magnet 23, and the top end of the pulling rope 25 is connected to the second magnet 24. The pulling rope 25 at the top of the second magnet 24 passes through the vertical pulling hole and the horizontal pulling hole inside the support shaft 12 and is inserted into the opening slot of the retractable groove 27. The top end of the pulling rope 25 is connected to the rod body of the first support rod 28 at the corresponding position.

[0027] A spring snap 33 is installed at a lower position on the vertical inner wall surface of each storage slot 27. A small iron piece is provided at a corresponding position of the first support rod 28 near the spring snap 33. After the first support rod 28 is fully retracted into the storage slot 27, the small iron piece on the first support rod 28 contacts the active end of the spring snap 33. When the first support rod 28 is retracted into the storage slot 27, the small iron piece on the first support rod 28 is attracted to the active end of the spring snap 33, ensuring that the first support rod 28 does not affect the lifting and lowering movement of the support shaft 12. When the bottom end of the first support rod 28 is ejected by the spring snap 33, the small iron piece on the first support rod 28 will be out of the operating range of the end of the spring snap 33, facilitating the subsequent extension of the second support rod 29, the third support rod 30, and the fourth support rod 31.

[0028] A pull rope 25 is connected to the bottom of the first magnet 23. The bottom end of the pull rope 25 extends through the connecting hole at the bottom of the first bracket 18 and is connected to a small hammer block 26. When the pull rope 25 drives the first magnet 23 upward to the highest position, the small hammer block 26 does not contact the bottom of the secondary support tube 8.

[0029] When the scanner 14 is in operation, the first support rod 28 is subjected to horizontal pressure by the cooperation of the spring snap 33, and the bottom end of the first support rod 28 rotates to disengage from the retracting groove 27. The first support rod 28 rotates and pulls the pulling rope 25 thereon to move accordingly, so that the first magnet 23 and the second magnet 24 are respectively disengaged from the No. 1 bracket 18 and the No. 2 bracket 22 and move upward. After the mounting seat 13 moves up, the adsorption force between the first clip 17 and the first clip 17 disappears. Under the reaction force of the No. 1 limit spring 16, the first clip 17 enters the first clip hole 7 to achieve the limiting effect on the secondary support tube 8. At the same time, after the second magnet 24 moves up, the adsorption force between the second clip 21 disappears. Under the reaction force of the No. 2 limit spring 20, the second clip 21 enters the second clip hole 11 to achieve the limiting effect on the support shaft 12, thereby realizing the stable support of the scanner 14. When scanning 14, the secondary buckle 21, the third support rod 30 and the second support rod 29 are successively retracted into the interior of the first support rod 28, and then the first support rod 28 is rotated and retracted into the interior of the receiving groove 27. With the cooperation of the spring snap 33, the first support rod 28 is stationary in the receiving groove 27. At this time, the first magnet 23 and the second magnet 24 re-enter the interior of the No. 1 bracket 18 and the No. 2 bracket 22 respectively, and the first magnet 23 re-generates the adsorption force on the primary buckle 17. At the same time, the second magnet 24 re-generates the adsorption force on the secondary buckle 21, so that the primary buckle 17 and the secondary buckle 21 return to their original positions, thereby removing the limiting effect on the secondary support tube 8 and the support shaft 12. By applying a downward force through the mounting seat 13, the secondary support tube 8 enters the interior of the first stretching cavity 5, and the support shaft 12 enters the interior of the second stretching cavity 9, so that the scanner 14 is quickly re-installed in the interior of the storage cavity 2.

[0030] Among them, see Figure 1-Figure 3 、 Figure 8 As shown, the balancing assembly includes a fixed plate 34, which is fixedly connected to the lower position inside the storage chamber 2, and a rotating chamber 35 is opened at the center position of the fixed plate 34. A rotating ball 36 is rotatably installed inside the rotating chamber 35. The top of the rotating ball 36 is connected to the bottom center position of the base plate 3 through a connecting short shaft. The bottom of the rotating ball 36 is fixedly connected to a connecting rod 37, and a weight block 38 is fixed to the bottom of the connecting rod 37. The bottom end surface of the weight block 38 is higher than the bottom end surface of the storage chamber 2.

[0031] A bidirectional screw 39 and a limit rod 40 are respectively installed on the inner wall surface of the storage chamber 2 on both sides of the rotating ball 36. The outside of the cross-section of both ends of the bidirectional screw 39 and the limit rod 40 are sleeved with a moving block 41. A clamping block 42 is fixedly connected to the structural end surface of the moving block 41 close to the rotating ball 36, and an anti-slip pad is pasted on the active arc surface of the clamping block 42. A small motor 43 is installed on the structural surface of one side of the moving box 1, and the output shaft end of the small motor 43 passes through the plate body of the moving box 1 and is connected to the end of the bidirectional screw 39.

[0032] A drive unit 44 is mounted on the bottom of the mobile box 1, with small rollers 45 mounted on either side of the drive unit 44. An insertion slot 46 is defined on the top end surface of the mobile box 1, and a lid 47 is mounted on top of the mobile box 1. An insertion plate 48 is fixedly attached to the bottom of the lid 47 and can be inserted into the insertion slot 46. Depending on the scanning position, the drive unit 44 and small rollers 45 can be used to move the mobile box 1 to a desired location. Subsequently, force is applied to the lid 47 to disengage the insertion plate 48 from the insertion slot 46, facilitating the subsequent raising and securing of the scanner 14.

[0033] During operation, through the structural design of the balancing component, the driving device 44 and the small roller 45 are used to move the mobile box 1 to the specified position and move out the box cover 47. If the scanning equipment is placed on a complicated ground, the mobile box 1 will be tilted. Under the action of gravity, the weight block 38 can drive the rotating ball 36 to rotate relative to each other along the rotating cavity 35, so that the connecting rod 37 and the first-level support cylinder 4 are always in a vertical state. After the first-level support cylinder 4 is stationary, the small motor 43 is started, and the bidirectional screw 39 rotates. With the cooperation of the limit rod 40, the moving blocks 41 on both sides drive the clamping blocks 42 to move toward each other and clamp on the surface of the rotating ball 36, so that the rotating ball 36 will no longer rotate, ensuring that the first-level support cylinder 4 always maintains a stable vertical state during the subsequent scanning process 14, achieving an automatic leveling effect, and facilitating the smooth progress of subsequent scanning operations.

[0034] In summary, the problem of the inconvenience of taking the scanning equipment and the need for multiple operators to assist in fixing it during installation has been effectively solved. The instrument itself is relatively expensive and heavy. Once it is damaged by a bump, it will not only affect the smooth progress of the scanning operation, but also increase the cost of this scanning work. In addition, when operating on some complex ground, it takes a lot of time to level the instrument, which makes the preparation work less efficient.

[0035] Working principle: Through the structural design of the balancing component, the driving device 44 and the small roller 45 are used to move the mobile box 1 to the specified position and remove the box cover 47. If the scanning equipment is placed on a complicated ground and the mobile box 1 is tilted, the weight block 38 can drive the rotating ball 36 to rotate relative to the rotating cavity 35 under the action of gravity, so that the connecting rod 37 and the first-level support cylinder 4 are always in a vertical state. After the first-level support cylinder 4 is stationary, the small motor 43 is started, and the bidirectional screw 39 rotates. With the cooperation of the limit rod 40, the moving blocks 41 on both sides drive the clamping blocks 42 to move toward each other and clamp on the surface of the rotating ball 36, so that the rotating ball 36 will no longer rotate, ensuring that the first-level support cylinder 4 always maintains a stable vertical state during the subsequent scanning process 14, achieving an automatic leveling effect, and facilitating the smooth progress of subsequent scanning operations. Through the structural design of the stretching support assembly, before the scanning operation is carried out, the scanner 14 can be raised by applying a pulling force to the mounting seat 13. During this process, the mounting seat 13 drives the support shaft 12 and the secondary support cylinder 8 to rise in turn. During the process of the support shaft 12 rising, the secondary buckle 21 slides to the top of the second lifting slot 10, and the secondary buckle 21 enters the opening range of the secondary clamping hole 11. At this time, the secondary buckle 21 has a tendency to move toward the secondary clamping hole 11. Under the limiting action of the second lifting slot 10 and the secondary clamping hole 11, the support shaft 12 stops moving upward inside the second stretching cavity 9. During the process of the secondary support cylinder 8 rising, the first buckle 17 slides to the top of the first lifting slot 6, and the first buckle 17 enters the opening range of the first clamping hole 7. At this time, the first buckle 17 has a tendency to move toward the first clamping hole 7. Under the limiting action of the primary clamping hole 7 and the primary clamping buckle 17, the secondary support cylinder 8 stops moving upward inside the first stretching cavity 5, so that the scanner 14 can be directly pulled up in the mobile box 1 without moving and transporting, avoiding bumping. After the support shaft 12 is completely pulled out, horizontal pressing force is applied to the secondary support cylinder 8 inside the retracting groove 27, and the first support rod 28 pops out from the retracting groove 27. With the cooperation of the retracting assembly, the primary clamping buckle 17 enters the primary clamping hole 7, and the secondary clamping buckle 21 enters the secondary clamping hole 11, so as to limit the secondary support cylinder 8 and the rod body of the support shaft 12, so that the scanner 14 can be stably supported. Subsequently, the fourth support rod 31, the third support rod 30 and the second support rod 29 inside the first support rod 28 are pulled out in sequence and supported on the ground, further strengthening the stability of the scanner 14 during operation; When the scanner 14 is installed, horizontal pressure is applied to the first support rod 28, and under the cooperation of the spring snap 33, the bottom end of the first support rod 28 rotates to disengage from the retracting groove 27, and the first support rod 28 rotates and pulls the pulling rope 25 thereon to move accordingly, so that the first magnet 23 and the second magnet 24 are respectively disengaged from the No. 1 bracket 18 and the No. 2 bracket 22 and move upward. After the mounting seat 13 moves up, the adsorption force between the first clip 17 and the first clip 17 disappears, and under the reaction force of the No. 1 limit spring 16, the first clip 17 enters the first clip hole 7, achieving the limiting effect on the secondary support tube 8. At the same time, after the second magnet 24 moves up, the adsorption force between the second clip 21 disappears, and under the reaction force of the No. 2 limit spring 20, the second clip 21 enters the second clip hole 11, achieving the limiting effect on the support shaft 12, thereby realizing stable support of the scanner 14. When the scanner 14 is moved, the secondary buckle 21, the third support rod 30 and the second support rod 29 are successively retracted into the interior of the first support rod 28, and then the first support rod 28 is rotated and retracted into the interior of the receiving groove 27. With the cooperation of the spring snap 33, the first support rod 28 is stationary in the receiving groove 27. At this time, the first magnet 23 and the second magnet 24 re-enter the interior of the No. 1 bracket 18 and the No. 2 bracket 22 respectively, and the first magnet 23 re-generates the adsorption force on the primary buckle 17. At the same time, the second magnet 24 re-generates the adsorption force on the secondary buckle 21, so that the primary buckle 17 and the secondary buckle 21 return to their original positions, thereby removing the limiting effect on the secondary support tube 8 and the support shaft 12. By applying a downward force through the mounting seat 13, the secondary support tube 8 enters the interior of the first stretching cavity 5, and the support shaft 12 enters the interior of the second stretching cavity 9, so that the scanner 14 is quickly re-installed in the interior of the storage cavity 2.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A portable laser scanning device for tunnel inspection, characterized by: The mobile box (1) comprises a storage chamber (2) on the top of the mobile box (1), a stretching support assembly is provided at an upper position inside the storage chamber (2), a folding assembly is installed in the stretching support assembly, and a balancing assembly is provided at a lower position inside the storage chamber (2); The stretching support assembly includes a base plate (3), the bottom plate (3) is arranged inside the storage cavity (2), the top of the base plate (3) is fixedly connected to a primary support tube (4), the top of the primary support tube (4) is provided with a first stretching cavity (5), a secondary support tube (8) is slidably arranged in the first stretching cavity (5), the top of the secondary support tube (8) is provided with a second stretching cavity (9), the inside of the second stretching cavity (9) is slidably provided with a support shaft (12), the top of the support shaft (12) is connected to a mounting seat (13), and the top of the mounting seat (13) is provided with a scanner (14).

2. The portable laser scanning device for tunnel detection according to claim 1, characterized in that: A first lifting groove (6) is symmetrically provided on the inner wall arc surface of the first stretching cavity (5), a first-level clamping hole (7) is provided on the top of the first lifting groove (6), and the first-level clamping hole (7) passes through the barrel of the first-level support cylinder (4), and a No. 1 telescopic cavity (15) is symmetrically provided on the bottom of the barrel of the second-level support cylinder (8), and the end of each No. 1 telescopic cavity (15) close to the central axis of the second-level support cylinder (8) is connected to a No. 1 limit spring (16), and the end of each No. 1 telescopic cavity (15) away from the central axis of the second-level support cylinder (8) is provided with a first-level clamp (17), and the other end of each No. 1 limit spring (16) is connected to the first-level clamp (17) at the corresponding position, and the cross-sectional diameter of the No. 1 telescopic cavity (15) is the same as the cross-sectional diameter of the first-level clamping hole (7). A second lifting groove (10) is symmetrically provided on the inner wall arc surface of the second stretching cavity (9), a secondary clamping hole (11) is provided on the top of the second lifting groove (10), and the secondary clamping hole (11) passes through the cylinder body of the secondary support cylinder (8), and a second telescopic cavity (19) is symmetrically provided at the bottom of the cylinder body of the support shaft (12), and each of the second telescopic cavities (19) is connected to a second limit spring (20) at the end close to the central axis of the support shaft (12), and each of the second telescopic cavities (19) is provided with a second buckle (21) at the end away from the central axis of the support shaft (12), and the other end of each of the second limit springs (20) is connected to the secondary buckle (21) at the corresponding position, and the cross-sectional diameter of the secondary clamping hole (11) is the same as the cross-sectional diameter of the second telescopic cavity (19).

3. The portable laser scanning device for tunnel detection according to claim 2, characterized in that: A retracting groove (27) is provided at an equal angle on the outer arc surface of the support shaft (12); a first support rod (28) is rotatably installed on the top end surface of the inner wall of the retracting groove (27); a second support rod (29) is slidably provided in the sleeve cavity inside the first support rod (28); a third support rod (30) is slidably provided in the sleeve cavity inside the second support rod (29); a fourth support rod (31) is slidably provided in the sleeve cavity inside the third support rod (30); the lower ends of the rod bodies of the first support rod (28), the second support rod (29) and the third support rod (30) are provided with a limiting clamping hole; the upper ends of the rod bodies of the second support rod (29), the third support rod (30) and the fourth support rod (31) are all provided with a limiting clamping buckle (32); the limiting clamping buckle (32) can be clamped in the limiting clamping hole at the corresponding position.

4. The portable laser scanning device for tunnel detection according to claim 1, characterized in that: The folding assembly includes a No. 1 bracket (18), and a No. 1 bracket (18) is provided at the center position of the bottom end surface of the inner wall of the second stretching cavity (9), which drives a connecting hole to be provided on the bottom end surface of the No. 1 bracket (18), and the connecting hole passes through the bottom of the cylinder body of the secondary support cylinder (8) and is connected with the opening space of the first stretching cavity (5). A No. 2 bracket (22) is provided inside the rod body of the support shaft (12) above the No. 2 telescopic cavity (19), and the central axis of the No. 2 bracket (22) coincides with the central axis of the support shaft (12). A first magnet (23) is provided inside the No. 1 bracket (18), and a second magnet (24) is provided inside the No. 2 bracket (22). The first magnet (23) can adsorb the first-level buckle (17) to move toward the first support rod (28), and the second magnet (24) can adsorb the second-level buckle (21) to move toward the No. 2 bracket (22).

5. The portable laser scanning device for tunnel detection according to claim 4, characterized in that: A vertical pulling hole is provided inside the support shaft (12) just above the No. 2 bracket (22), and the bottom of the vertical pulling hole is communicated with the opening space of the No. 2 bracket (22). A horizontal pulling hole is provided on the vertical inner wall of the No. 2 bracket (22), and the horizontal pulling hole is communicated with the vertical pulling hole. A pulling rope (25) is connected to the first magnet (23), and the top end of the pulling rope (25) is connected to the second magnet (24). The pulling rope (25) at the top of the second magnet (24) passes through the vertical pulling hole and the horizontal pulling hole inside the support shaft (12) and is inserted into the opening slot of the retractable slot (27). The top end of the pulling rope (25) is connected to the rod body of the first support rod (28) at the corresponding position.

6. The portable laser scanning device for tunnel detection according to claim 5, characterized in that: A spring snap button (33) is installed at a lower position of the vertical inner wall surface of each of the storage grooves (27), and a small iron piece is provided at a corresponding position of the first support rod (28) close to the spring snap button (33). After the first support rod (28) is completely retracted into the storage groove (27), the small iron piece on the first support rod (28) contacts the active end of the spring snap button (33).

7. The portable laser scanning device for tunnel detection according to claim 6, characterized in that: The bottom of the first magnet (23) is connected to a pulling rope (25), and the bottom end of the pulling rope (25) extends through the connecting hole at the bottom of the No. 1 bracket (18) and is connected to a small hammer block (26).

8. The portable laser scanning device for tunnel detection according to claim 1, characterized in that: The balancing assembly includes a fixed plate (34), the fixed plate (34) is fixedly connected to a lower position inside the storage chamber (2), a rotating chamber (35) is opened at the center of the fixed plate (34), a rotating ball (36) is rotatably installed inside the rotating chamber (35), the top of the rotating ball (36) is connected to the bottom center of the bottom plate (3) through a connecting short shaft, the bottom of the rotating ball (36) is fixedly connected to a connecting rod (37), and a weight block (38) is fixed to the bottom of the connecting rod (37), and the bottom end surface of the weight block (38) is higher than the bottom end surface of the storage chamber (2).

9. The portable laser scanning device for tunnel detection according to claim 5, characterized in that: A bidirectional screw rod (39) and a limiting rod (40) are respectively installed on the inner wall surface of the storage chamber (2) at positions on both sides of the rotating ball (36), and a moving block (41) is sleeved on the outside of the cross section of both ends of the bidirectional screw rod (39) and the limiting rod (40). A clamping block (42) is fixedly connected to the structural end surface of the moving block (41) close to the rotating ball (36), and an anti-slip pad is pasted on the active arc surface of the clamping block (42). A small motor (43) is installed on the structural surface of one side of the moving box (1), and the output shaft end of the small motor (43) passes through the plate body of the moving box (1) and is connected to the end of the bidirectional screw rod (39).

10. The portable laser scanning device for tunnel detection according to claim 9, characterized in that: A driving device (44) is installed at the bottom of the moving box (1), and small rollers (45) are installed on both sides of the driving device (44). An insertion groove (46) is opened on the top end surface of the moving box (1), and a box cover (47) is provided on the top of the moving box (1). An insertion plate (48) is fixed to the bottom of the box cover (47), and the insertion plate (48) can be inserted into the interior of the insertion groove (46).

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