A device and operating method for detecting cracks in cement-stabilized crushed stone base courses of municipal roads.

Abstract

This invention belongs to the field of municipal road technology, and particularly relates to a device and operating method for detecting cracks in cement-stabilized crushed stone base layers of municipal roads. It includes a frame assembled from four supports, within which plates are slidably installed. Each of the four supports has a fixed leg at its corner, and a sphere is fixedly connected to the lower end of each leg. Each sphere has a spherical groove fitted onto it, and the spherical groove is adhered to the road base layer. Each support has a fixed plate installed on it, and two fixed plates form a group. A sliding plate is positioned below each group, and the two fixed plates are connected to the sliding plate via connecting springs. The plates are slidably installed on the two sliding plates. Workers can directly determine the presence of cracks by observing whether colored light is visible around the perimeter of the plates. This detection method is simple and obvious, effectively avoiding the problem of missing cracks due to their small size.

Description

Technical Field

[0001] This invention belongs to the field of municipal road technology, and in particular relates to a device and operating method for detecting cracks in cement-stabilized crushed stone base courses of municipal roads. Background Technology

[0002] Cement-stabilized crushed stone uses graded crushed stone as aggregate, with a certain amount of cementitious material and sufficient mortar volume to fill the voids in the aggregate, and is spread and compacted according to the interlocking principle. Its compaction degree is close to its density, and its strength mainly relies on the interlocking principle between the crushed stones, while having sufficient mortar volume to fill the voids in the aggregate.

[0003] As is known from existing technology, once the road base is laid, workers can only know the road condition when a large, visible crack appears on the road surface. Therefore, the inspection of road surface cracks relies on manual inspection, which is subject to certain human error and can only detect a very limited number of cracks. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a crack detection device for cement-stabilized crushed stone base layer of municipal roads.

[0005] The present invention proposes a crack detection device for cement-stabilized crushed stone base of municipal roads, comprising a frame assembled from four supports, a plate slidably installed inside the frame, a leg fixedly connected to the corner of each of the four supports, a ball fixedly connected to the lower end of each leg, and a spherical groove fitted on each sphere, the spherical groove being bonded to the road base.

[0006] Each bracket is equipped with a fixing plate, two fixing plates form a group, and a sliding plate is provided below the group. The two fixing plates are connected to the sliding plate by a connecting spring, and the plate is slidably installed on the two sliding plates.

[0007] A lamp tube is fixedly installed on the inner wall of the plate. A movable groove is opened on the edge of the lower surface of the plate. An annular plate is inserted into the movable groove. A thick silicone ring is installed at the end of the annular plate. An elastic mechanism is symmetrically arranged between the movable groove and the annular plate.

[0008] A drive mechanism is provided at one end of the frame, and the drive mechanism includes two threaded rods.

[0009] Preferably, the drive mechanism further includes a linkage shaft, with two threaded rods threaded through one side of the two supports respectively. A second gear is threaded onto the threaded rod, and a first gear is meshed above the two second gears. Three convex shafts are provided on the linkage shaft, with a motor frame fixedly mounted on one of the supports. A motor is fixedly mounted inside the motor frame, and a turntable is fixedly connected to the drive end of the motor. The ends of the three convex shafts are rotatably connected to the turntable and the edges of the two first gears at the same angle.

[0010] Preferably, the two second gears are rotatably mounted on the side of the bracket, and the first gear is rotatably mounted on the upper surface of the bracket via a rotating component.

[0011] Preferably, the upper surface of the plate is symmetrically provided with sliding grooves, the two sliding plates are respectively slidably engaged in the sliding grooves on both sides, a connecting sleeve is sleeved on the side of the two sliding grooves that are far apart from each other, the edge of the connecting sleeve is provided with a connecting block, and the two threaded rods are respectively rotatably connected to the two connecting blocks.

[0012] Preferably, two protrusions are symmetrically arranged on the side of the two grooves that are far apart from each other, and the connecting sleeve is simultaneously sleeved with the two protrusions.

[0013] Preferably, each of the brackets is an L-shaped structure, and two adjacent brackets are rotatably connected, with the rotatable direction being vertical. The lower surface of each spherical groove is provided with an adhesive rubber pad.

[0014] Preferably, the elastic mechanism includes two rotating shafts, one above the other, arranged symmetrically on the left and right sides. An upper connecting plate is fixedly disposed on the surface of the movable groove, and a lower connecting plate is fixedly disposed on the surface of the annular plate. The upper rotating shaft is rotatably connected to the upper connecting plate, and the lower rotating shaft is rotatably connected to the lower connecting plate. The two rotating shafts are rotatably connected together by connecting pieces, and an electric spring is installed between the two connecting pieces.

[0015] Preferably, the lower surface of the plate is provided with a slot, each slot is provided with a movable support shaft, the end of the movable support shaft away from the slot is provided with a silicone pad, and a telescopic spring is installed in the slot.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. Staff can directly observe whether colored light is visible around the edge of the slab to determine if there are cracks. This detection method is simple and obvious, and can effectively avoid the problem of omission due to small cracks. When the energized spring is energized and contracts, the thick silicone ring will be lifted, and the drive mechanism can move the position of the slab. When the energized spring is de-energized, the thick silicone ring will adhere to the road surface, and the detection and observation can be carried out. The operation process is simple and clear.

[0018] 2. The soft, thick silicone ring adapts well to the surface material and fits tightly under pressure, preventing light from leaking out from the side. The plate is detachable from the skateboard, and the open groove allows it to be pulled out from one end of the skateboard. The connecting spring is installed at the center line between the fixed plate and the skateboard. By increasing the distance between the skateboard and the fixed plate, the plate can be removed from one end of the skateboard. At the same time, the fixed plate is elastically connected to the skateboard through the connecting spring, which can also adapt to different local angles of the frame. Attached Figure Description

[0019] Figure 1 This is a top view cross-sectional schematic diagram of a crack detection device for cement-stabilized crushed stone base layer of municipal roads proposed in this invention;

[0020] Figure 2 This is a side view of a crack detection device for cement-stabilized crushed stone base layer of municipal roads proposed in this invention.

[0021] Figure 3 This is a schematic diagram of the elastic mechanism;

[0022] Figure 4 This is a schematic diagram of the bottom structure of the plate;

[0023] Figure 5 This is a schematic diagram of the drive mechanism.

[0024] In the diagram: 1. Bracket, 2. Threaded rod, 3. Slide plate, 4. Plate, 5. Slide groove, 6. Spherical groove, 7. Foot, 8. Sphere, 9. Adhesive rubber pad, 10. Fixing plate, 11. Connecting sleeve, 12. Connecting block, 13. Linkage shaft, 14. Motor frame, 15. Movable groove, 16. Annular plate, 17. Thick silicone ring, 18. Movable support shaft, 19. Slot, 20. Lower connecting plate, 21. Rotating shaft, 22. Upper connecting plate, 23. Electric spring, 24. Connecting piece, 25. Lamp tube, 26. Silicone pad, 27. Motor, 28. Turntable, 29. Protruding shaft, 30. First gear, 31. Second gear, 32. Connecting spring. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Reference Figures 1-5 A crack detection device for cement-stabilized crushed stone base of municipal roads includes a frame assembled from four supports 1. Plates 4 are slidably installed inside the frame. Supports 7 are fixedly connected to the corners of the four supports 1. Balls 8 are fixedly connected to the lower ends of the supports 7. Each ball 8 is fitted with a spherical groove 6, which is adhered to the road base. Each support 1 is an L-shaped structure. The two adjacent supports 1 are rotatably connected, and the rotatable direction is vertical. An adhesive rubber pad 9 is provided on the lower surface of each spherical groove 6. Since the road base is a mixture of cement and crushed stone, its surface is uneven. The adhesive rubber pad 9 can adhere well to the uneven surface. The rotatable connection between the two supports 1 can adapt to the uneven surface.

[0027] Each bracket 1 is equipped with a fixed plate 10. Two fixed plates 10 form a group, and a sliding plate 3 is provided below the group. The two fixed plates 10 are connected to the sliding plate 3 by connecting springs 32. The plate 4 is slidably mounted on the two sliding plates 3. The lower surface of the plate 4 is provided with slots 19. Each slot 19 is fitted with a movable support shaft 18. A silicone pad 26 is provided at the end of the movable support shaft 18 away from the slot 19. A telescopic spring is installed in the slot 19. The telescopic spring installed in the slot 19 can resist the movable support shaft 18 under the action of elasticity, so that the silicone pad 26 can fully contact the road surface.

[0028] A lamp tube 25 is fixedly installed on the inner wall of the plate 4. A movable groove 15 is opened on the edge of the lower surface of the plate 4. An annular plate 16 is inserted into the movable groove 15. A thick silicone ring 17 is installed at the end of the annular plate 16. An elastic mechanism is symmetrically arranged between the movable groove 15 and the annular plate 16.

[0029] The elastic mechanism includes two symmetrically arranged rotating shafts 21, one above the other. An upper connecting plate 22 is fixedly mounted on the surface of the movable groove 15, and a lower connecting plate 20 is fixedly mounted on the surface of the annular plate 16. The upper rotating shaft 21 is rotatably connected to the upper connecting plate 22, and the lower rotating shaft 21 is rotatably connected to the lower connecting plate 20. The two rotating shafts 21 are rotatably connected together by connecting pieces 24, and an energized spring 23 is installed between the two connecting pieces 24. Under the elastic force of the energized spring 23, the connecting pieces 24 push the connecting pieces 24 to both sides, and the connecting pieces 24 then apply force to the rotating shafts 21 on both sides. The upper and lower rotating shafts 21 on both sides abut against the upper connecting plate 22 and the lower connecting plate 20 respectively, thereby allowing the annular plate 16 to drive the thick silicone ring 17 to fully contact the road base surface.

[0030] A drive mechanism is provided at one end of the frame. The drive mechanism includes two threaded rods 2 and a linkage shaft 13. The two threaded rods 2 are threaded through one side of the two supports 1 respectively. A second gear 31 is threaded onto the threaded rods 2. A first gear 30 is meshed above the two second gears 31. Three convex shafts 29 are provided on the linkage shaft 13. A motor frame 14 is fixedly installed on one of the supports 1. A motor 27 is fixedly installed inside the motor frame 14. A turntable 28 is fixedly connected to the drive end of the motor 27. The ends of the three convex shafts 29 are rotatably connected to the turntable 28 and the edges of the two first gears 30 at the same angle. The motor 27 drives the turntable 28 to rotate through the drive end. The convex shafts 29 are connected to the turntable 28. Through the linkage shaft 13, the remaining two convex shafts 29 move along the same trajectory, thereby operating the first gear 30 through the convex shafts 29, causing the first gear 30 to rotate. The first gear 30 drives the second gear 31 to rotate, thereby realizing the back-and-forth movement of the threaded rods 2 relative to the supports 1.

[0031] Two second gears 31 are rotatably mounted on the side of the bracket 1, and the first gear 30 is rotatably mounted on the upper surface of the bracket 1 via a rotating component. The second gears 31 and the first gear 30 mesh with each other. The second gears 31 influence the threaded rod 2, while the first gear 30 is influenced by the trajectory of the motor frame 14.

[0032] The upper surface of plate 4 is symmetrically provided with sliding grooves 5. Two sliding plates 3 are respectively slidably engaged in the sliding grooves 5 on both sides. A connecting sleeve 11 is sleeved on the side of the two sliding grooves 5 that is far apart from each other. A connecting block 12 is provided on the edge of the connecting sleeve 11. Two threaded rods 2 are rotatably connected to the two connecting blocks 12 respectively. Plate 4 is slidably engaged with the two sliding plates 3 through the sliding grooves 5, so the entire plate 4 can be detached from one side. The threaded rods 2 can move plate 4 relative to the sliding plates 3. The threaded rods 2 are connected to the sliding grooves 5 through the connecting sleeves 11. The connecting sleeve 11 is sleeved on one side of the sliding groove 5, thereby realizing the connection between the threaded rods 2 and plate 4. The relative position of plate 4 is controlled by the threaded rods 2. Two protrusions are symmetrically provided on the side of the two sliding grooves 5 that is far apart from each other. The connecting sleeve 11 is sleeved on both protrusions at the same time. The connecting sleeve 11 and the threaded rod 2 are rotatably connected. The connecting sleeve 11 and the sliding groove 5 are sleeved, so the connecting sleeve 11 and the sliding groove 5 can be detached.

[0033] When it is necessary to inspect the road base surface, the frame is first installed on the road base. The length of the frame is unlimited, and its length is affected by the size of the bracket 1. The appropriate size can be selected as needed. The adhesive rubber pad 9 at the bottom of the spherical groove 6 is glued to the road base for fixation. The support 7 is movably installed in the spherical groove 6 through the ball 8. The spherical structure has a high degree of freedom, and the two brackets 1 are rotatably connected, so that the two ends of the frame are not on the same plane, which can flexibly adapt to different road environments.

[0034] In the drive mechanism, the motor 27 drives the turntable 28 to rotate through the drive end. The turntable 28 pulls the corresponding cam shaft 29. Multiple cam shafts 29 are fixedly connected together through the linkage shaft 13, so that the movement trajectory of multiple cam shafts 29 will be synchronized. The cam shaft 29 is rotatably connected to the edge of the turntable 28, so that the first gear 30 and the turntable 28 will rotate synchronously. The first gear 30 drives the second gear 31 to rotate. One end of the second gear 31 is restricted in angle by the plate 4. With the rotation of the second gear 31, the threaded rod 2 can move back and forth relative to the bracket 1. One end of the bracket 1 drives the plate 4 to move back and forth on the slide plate 3 through the connecting sleeve 11.

[0035] Once the position of plate 4 is determined, the energized spring 23 extends after being de-energized, simultaneously applying pressure to the connecting plates 24 at both ends. The connecting plates 24 push the rotating shaft 21 to rotate. The four rotating shafts 21 cooperate with each other to increase the distance between the upper connecting plate 22 and the lower connecting plate 20. The position of the upper connecting plate 22 and plate 4 is fixed relative to the sliding plate 3. Thus, under the action of the elastic mechanism, the annular plate 16 drives the thick silicone ring 17 to press against the road surface. The movable groove 15, the annular plate 16, the thick silicone ring 17, plate 4 and the road base form a closed environment. The surface of the annular plate 16 is black and opaque. The lamp tube 25 inside plate 4 emits blue or red strong light. By illuminating the road base, if there is a crack, the light will spread along the crack. The red or blue light can be directly observed outside the range of plate 4, indicating that there is a crack where the light is exposed.

[0036] Workers can directly observe whether colored light is visible around the perimeter of the plate 4 to determine if there are cracks. This detection method is simple and obvious, and can effectively avoid omissions due to small cracks. When the energized spring 23 is energized and contracts, the thick silicone ring 17 will be lifted, and the drive mechanism can move the position of the plate 4. When the energized spring 23 is de-energized, the thick silicone ring 17 will adhere to the road surface, and the detection and observation can be carried out. The operation process is simple and clear.

[0037] The soft, thick silicone ring 17 can adapt well to the road surface material and fit tightly under pressure to prevent light from leaking out from the side. Meanwhile, the plate 4 is detachable from the slide plate 3. The open slide groove 5 can be pulled out from one end of the slide plate 3. The connecting spring 32 is installed at the center line between the fixed plate 10 and the slide plate 3. By increasing the distance between the slide plate 3 and the fixed plate 10, the plate 4 can be removed from one end of the slide plate 3. At the same time, the fixed plate 10 is elastically connected to the slide plate 3 through the connecting spring 32, which can also adapt to different local angles of the frame.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for detecting cracks in cement-stabilized crushed stone base courses of municipal roads, comprising a frame assembled from four supports (1), wherein a plate (4) is slidably installed within the frame, characterized in that, Each of the four brackets (1) is fixedly connected to a leg (7) at the corner. A ball (8) is fixedly connected to the lower end of the leg (7). A spherical groove (6) is fitted on each ball (8). The spherical groove (6) is bonded to the road base. Each bracket (1) is equipped with a fixing plate (10), two fixing plates (10) form a group, and a sliding plate (3) is provided below a group of fixing plates (10). The two fixing plates (10) are connected to the sliding plate (3) by connecting springs (32), and the plate (4) is slidably installed on the two sliding plates (3). A lamp tube (25) is fixedly installed on the inner wall of the plate (4). A movable groove (15) is opened on the edge of the lower surface of the plate (4). An annular plate (16) is inserted in the movable groove (15). A thick silicone ring (17) is installed at the end of the annular plate (16). An elastic mechanism is symmetrically arranged between the movable groove (15) and the annular plate (16). One end of the frame is provided with a drive mechanism, which includes two threaded rods (2). The drive mechanism also includes a linkage shaft (13), two threaded rods (2) threaded through one side of two brackets (1), a second gear (31) threadedly sleeved on the threaded rod (2), a first gear (30) meshing above the two second gears (31), three convex shafts (29) provided on the linkage shaft (13), a motor frame (14) fixedly installed on one of the brackets (1), a motor (27) fixedly installed inside the motor frame (14), a turntable (28) fixedly connected to the drive end of the motor (27), and the ends of the three convex shafts (29) rotatably connected to the turntable (28) and the edges of the two first gears (30) at the same angle respectively; The upper surface of the plate (4) is symmetrically provided with grooves (5), and the two slide plates (3) are respectively slidably engaged in the grooves (5) on both sides. A connecting sleeve (11) is sleeved on the side of the two grooves (5) that are far apart from each other. A connecting block (12) is provided on the edge of the connecting sleeve (11), and the two threaded rods (2) are respectively rotatably connected to the two connecting blocks (12). Two protrusions are symmetrically arranged on the side of the two grooves (5) that are far apart from each other, and the connecting sleeve (11) is simultaneously sleeved with the two protrusions; The elastic mechanism includes two rotating shafts (21) arranged symmetrically on the left and right, one above the other. An upper connecting plate (22) is fixedly installed on the surface of the movable groove (15), and a lower connecting plate (20) is fixedly installed on the surface of the annular plate (16). The upper rotating shaft (21) is rotatably connected to the upper connecting plate (22), and the lower rotating shaft (21) is rotatably connected to the lower connecting plate (20). The two rotating shafts (21) are rotatably connected together by connecting pieces (24), and an electric spring (23) is installed between the two connecting pieces (24).

2. The device for detecting cracks in cement-stabilized crushed stone base courses of municipal roads according to claim 1, characterized in that, Two second gears (31) are rotatably mounted on the side of the bracket (1), and the first gear (30) is rotatably mounted on the upper surface of the bracket (1) via a rotating component.

3. The device for detecting cracks in cement-stabilized crushed stone base courses of municipal roads according to claim 1, characterized in that, Each of the brackets (1) is an L-shaped structure, and two adjacent brackets (1) are rotatably connected, and the rotatable direction is vertical. Each of the spherical grooves (6) has an adhesive rubber pad (9) on its lower surface.

4. The device for detecting cracks in cement-stabilized crushed stone base courses of municipal roads according to claim 1, characterized in that, The lower surface of the plate (4) is provided with slots (19), each slot (19) is provided with a movable support shaft (18), the end of the movable support shaft (18) away from the slot (19) is provided with a silicone pad (26), and a telescopic spring is installed in the slot (19).

5. A method for operating the municipal road base cement-stabilized crushed stone crack detection device according to claim 3, characterized in that, The operation steps are as follows: First: Install the frame on the road base. The length of the frame is unlimited and is affected by the size of the bracket (1). Select the appropriate size as needed. The adhesive rubber pad (9) at the bottom of the spherical groove (6) is glued to the road base for fixation. The support leg (7) is installed in the spherical groove (6) through the ball (8). The spherical structure has a high degree of freedom, and the two brackets (1) are rotatably connected. In the drive mechanism, the motor (27) drives the turntable (28) to rotate through the drive end. The turntable (28) pulls the corresponding cam shaft (29). Multiple cam shafts (29) are fixedly connected together through the linkage shaft (13). The movement trajectories of multiple cam shafts (29) are synchronized. The cam shaft (29) is rotated and connected to the edge of the turntable (28). The first gear (30) and the turntable (28) will rotate synchronously. The first gear (30) drives the second gear (31) to rotate. One end of the second gear (31) is restricted in angle by the plate (4). With the rotation of the second gear (31), the threaded rod (2) can move back and forth relative to the bracket (1). One end of the bracket (1) drives the plate (4) to move back and forth on the slide plate (3) through the connecting sleeve (11). Once the position of plate (4) is determined, the energized spring (23) is de-energized and extends, applying pressure to the connecting plates (24) at both ends simultaneously. The connecting plates (24) push the rotating shaft (21) to rotate. The four rotating shafts (21) cooperate with each other to open the distance between the upper connecting plate (22) and the lower connecting plate (20). The position of the upper connecting plate (22) and plate (4) is fixed relative to the sliding plate (3). Thus, under the action of the elastic mechanism, the ring plate (16) drives the thick silicone ring (17) to press against the road surface. The movable groove (15), ring plate (16), thick silicone ring (17), plate (4) and road base form a closed environment. The surface of the ring plate (16) is black and opaque. The lamp tube (25) inside the plate (4) emits strong blue or red light. By illuminating the road base, if there is a crack, the light will spread along the crack. Red or blue light can be directly observed outside the range of plate (4), indicating that there is a crack where the light is exposed. Staff can directly observe whether colored light is visible around the plate (4) to determine if there is a crack. When the energized spring (23) is energized and contracted, the thick silicone ring (17) will be lifted, and the drive mechanism can move the plate (4) to its position.

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