A crack detection device for concrete

Abstract

The application discloses a kind of concrete crack detection devices, including base, support, walking wheel, handrail, the quantity of the support is four and is installed in the four corners below base, the walking wheel is located in the outside of support and two walking wheels of same end are rotatably installed on support by connecting shaft, the handrail is installed in the side of base, display screen is installed in the end close to handrail on base, depth measuring mechanism is installed in the side of display screen, cleaning mechanism is installed in the end away from handrail on base, width measuring mechanism is located in the side of cleaning mechanism, detection mechanism is located in the side of width measuring mechanism, and width measuring mechanism and detection mechanism are installed on base.The application can clean the inside of crack by cleaning mechanism, ensure the accuracy of data when crack detection, detect the width of crack by width detection mechanism, and expand the range of use.

Description

Technical Field

[0001] This invention belongs to the field of concrete crack detection technology, and specifically relates to a concrete crack detection device. Background Technology

[0002] In civil engineering, concrete structures dominate. Due to the influence of internal and external factors, cracks inevitably appear in concrete structures. Cracks are the main reason for the reduction in the load-bearing capacity, durability and waterproofing of concrete structures. After cracks appear in concrete, they need to be detected to determine the treatment method. Crack detection devices are needed to detect concrete cracks.

[0003] A search revealed that Chinese invention patent application number 202011066857.5 discloses a road and bridge asphalt pavement crack detection device, specifically including a base, a housing welded to the upper surface of the base, and two pairs of vertical support plates welded to the lower surface of the base. Each pair of support plates has an axle rotatably connected to its lower end via a bearing, and a wheel is coaxially welded to both ends of each axle. A push handle is fixedly connected to one side of the housing on the base. The housing contains a cleaning device and a detection mechanism. Research found that while this device allows inspectors to observe road surface cracks without bending or squatting, improving detection efficiency, and the cleaning device sweeps the road surface to be traversed, removing debris and dust from the cracks and improving the accuracy of the detection mechanism, it still has the following drawbacks: when cleaning the ground with the cleaning device, only debris and dust on the surface of the cracks can be removed; debris and dust inside the cracks cannot be cleaned, leading to inaccurate data during crack detection. Furthermore, it can only detect the depth of the cracks, not their width, reducing its applicability. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a concrete crack detection device. The device has a cleaning mechanism that can clean the inside of the crack to ensure the accuracy of the data during crack detection, and a width detection mechanism that can detect the width of the crack, thus expanding its application range.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A concrete crack detection device includes a base, supports, wheels, and a handrail. Four supports are installed at the four corners below the base. The wheels are located on the outer side of the supports, with two wheels at the same end rotatably mounted on the supports via a connecting shaft. The handrail is installed on one side of the base. A display screen is installed on the base near the handrail. A depth measuring mechanism is installed on one side of the display screen. The depth measuring mechanism includes an L-shaped plate, an electromagnet, and a metal rod. The L-shaped plate is installed above the base, and the electromagnet is installed below the top of the L-shaped plate. The metal rod is movably mounted on the base and is located directly below the electromagnet. A baffle is installed below the base and on the metal rod. A third spring is installed above the baffle and around the metal rod, with its top mounted on the base. The third spring is compressed when the electromagnet is energized. A scale is also installed on the metal rod.

[0007] A cleaning mechanism is installed on the base away from the armrest. The cleaning mechanism includes a housing, a rack, a gear, a first motor, a guide rod, a guide block, a first spring, a second motor, and a cleaning brush. The housing is slidably installed on the base. The rack is installed on one side of the housing. The first motor is installed at the bottom of the base and on one side of the housing. The gear is installed at the end of the output shaft of the first motor and meshes with the rack. The guide rod is installed inside the housing. The guide block is slidably installed on the guide rod. First springs are sleeved on both sides of the guide block and around the guide rod. One side of the first spring is installed on the side wall of the guide block, and the other side is installed on the inner wall of the housing. The guide block is positioned in the middle of the guide rod under the preload of the first springs on both sides. The second motor is installed at the bottom of the guide block, and the cleaning brush is installed on the output shaft of the second motor.

[0008] The cleaning mechanism has a width measuring mechanism on one side, which includes a bidirectional lead screw, a first slider, a third motor, a measuring plate, a first support plate, and a second spring. Movable slots are formed on both sides of the base. The bidirectional lead screw is installed inside the movable slots and extends to the outside of the base at both ends. The third motor is connected to one end of the bidirectional lead screw. The other end of the bidirectional lead screw has a bearing seat, and the end of the bidirectional lead screw is rotatably mounted on the bearing seat. There are two first sliders, threaded onto the bidirectional lead screws in different directions. A measuring plate is installed at the bottom of the first slider. An L-shaped rod is installed on the top of the block, and a sliding groove for the L-shaped rod to move is also provided on the base. First support plates are installed on both sides of the base and below the third motor and the shaft seat. Second springs are installed at the bottom of the shaft seat and the third motor, and the ends of the second springs are installed on the first support plates. Second support plates are installed on both sides of the base and above the third motor and the shaft seat. T-shaped rods are inserted into the outer side of the second support plates. U-shaped rods are movably installed on the two second support plates. Multiple through holes are provided on the U-shaped rods. The T-shaped rods fix the U-shaped rods to the second support plates through the through holes.

[0009] A detection mechanism is provided on one side of the width measuring mechanism. The detection mechanism includes a fourth motor, a lead screw, a second slider, and a miniature camera. The lead screw shaft is mounted on the base, the fourth motor is mounted on one side of the base and connected to one end of the lead screw, the second slider is threaded onto the lead screw, and a connecting plate is mounted on the bottom of the second slider. The miniature camera is mounted on one side of the connecting plate and electrically connected to the display screen. The captured images are transmitted to the display screen through the miniature camera. The fourth motor drives the lead screw to rotate, and the second slider moves on the lead screw, causing the miniature camera to adjust its position. This allows for the detection of cracks at different locations, expanding the application range of the device. Both the width measuring mechanism and the detection mechanism are mounted on the base.

[0010] Preferably, telescopic rods are installed on both sides of the connecting plate, the miniature camera is installed on one of the telescopic rods, and a fifth motor is installed on the other telescopic rod. A drill bit is installed at the end of the output shaft of the fifth motor.

[0011] Preferably, pressure plates are installed at both ends of the U-shaped rod, and a scale is installed on one side below the L-shaped rod.

[0012] Preferably, a guide bar is installed on the side of the housing away from the rack, and the cleaning brush is bolted to the second motor.

[0013] The beneficial effects of this invention are:

[0014] 1) The cleaning mechanism can clean the inside of the crack, ensuring the accuracy of the data during crack detection. The width detection mechanism can detect the width of the crack, expanding the scope of application.

[0015] 2) By installing guide bars on the side of the housing away from the rack, the contact area between the housing and the base is increased. The cleaning brush is bolted to the second motor, which makes it easy to replace different cleaning brushes according to the size of the crack, thus improving the efficiency of replacing the cleaning brush.

[0016] 3) By installing pressure plates at both ends of the U-shaped rod, the contact area between the U-shaped rod and the third motor and the bearing is increased, making the force on the third motor and the bearing more uniform and facilitating their movement. A scale is installed on one side of the lower part of the L-shaped rod, which allows for quick reading and determination of the crack width, thus improving work efficiency.

[0017] 4) By installing telescopic rods on both sides of the connecting plate, the miniature camera is mounted on one of the telescopic rods, and the fifth motor is mounted on the other telescopic rod. A drill bit is mounted on the output shaft end of the fifth motor. The telescopic rods can drive the miniature camera to enter the crack for close-up observation. When it is necessary to observe the inside of the crack but the miniature camera cannot enter the crack, the telescopic rods drive the fifth motor to move downwards. The fifth motor works to make the drill bit rotate to drill a hole in the crack, thereby facilitating the entry of the miniature camera. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the structure of a concrete crack detection device according to the present invention.

[0019] Appendix Figure 2 This is a schematic diagram of the internal structure of the base in a concrete crack detection device according to the present invention.

[0020] Appendix Figure 3 This is a schematic diagram of the cleaning mechanism in a concrete crack detection device of the present invention.

[0021] Appendix Figure 4 This is a schematic diagram of the width measuring mechanism in a concrete crack detection device of the present invention.

[0022] Appendix Figure 5 This is a schematic diagram of the detection mechanism in a concrete crack detection device of the present invention.

[0023] Appendix Figure 6 This is a schematic diagram of the depth measuring mechanism in a concrete crack detection device according to the present invention.

[0024] In the diagram: 1. Base; 2. Bracket; 3. Wheels; 4. Handrail; 5. Sweeping mechanism; 501. Housing; 502. Rack; 503. Gear; 504. First motor; 505. Guide bar; 506. Guide rod; 507. Guide block; 508. First spring; 509. Second motor; 510. Sweeping brush; 6. Width measuring mechanism; 601. Bidirectional lead screw; 602. First slider; 603. Third motor; 604. Measuring plate; 605. L-shaped rod; 606. Slide groove; 607. Movable groove; 608. First support plate; 609. 610. Second spring; 611. Shaft seat; 612. Pressure plate; 613. U-shaped rod; 614. Second support plate; 615. T-shaped rod; 7. Depth measuring mechanism; 701. L-shaped plate; 702. Electromagnet; 703. Baffle; 704. Third spring; 705. Metal rod; 7051. Scale; 8. Detection mechanism; 801. Fourth motor; 802. Lead screw; 803. Second slider; 804. Connecting plate; 805. Telescopic rod; 806. Miniature camera; 807. Fifth motor; 808. Drill bit; 9. Ruler; 10. Display screen. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-6 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0027] A concrete crack detection device includes a base 1, a support 2, wheels 3, and a handrail 4. Four supports 2 are installed at the four corners below the base 1. The wheels 3 are located on the outside of the supports 2, with two wheels 3 at the same end rotatably mounted on the supports 2 via a connecting shaft. The handrail 4 is installed on one side of the base 1. A display screen 10 is installed on the end of the base 1 closest to the handrail 4. A depth measuring mechanism 7 is installed on one side of the display screen 10. A cleaning mechanism 5 is installed on the end of the base 1 furthest from the handrail 4. A width measuring mechanism 6 is provided on one side of the cleaning mechanism 5. A detection mechanism 8 is provided on one side of the width measuring mechanism 6. Both the width measuring mechanism 6 and the detection mechanism 8 are mounted on the base 1.

[0028] The cleaning mechanism 5 includes a housing 501, a rack 502, a gear 503, a first motor 504, a guide rod 506, a guide block 507, a first spring 508, a second motor 509, and a cleaning brush 510. The housing 501 is slidably mounted on a base 1. The rack 502 is mounted on one side of the housing 501. The first motor 504 is mounted on the bottom of the base 1 and positioned on one side of the housing 501. The gear 503 is mounted on the output shaft end of the first motor 504 and meshes with the rack 502. The guide rod 506 is mounted inside the housing 501. The guide block 507 is slidably mounted on the guide rod 506. First springs 508 are sleeved on both sides of the guide block 507 and around the guide rod 506. One side of the first spring 508 is mounted on the side wall of the guide block 507, and the other side is mounted on the inner wall of the housing 501. The guide block 507 is positioned in the middle of the guide rod 506 under the preload of the first springs 508 on both sides. The second motor 509 is mounted on the guide block. At the bottom of 507, the cleaning brush 510 is mounted on the output shaft of the second motor 509. When cleaning of the crack is required, the first motor 504 drives the gear 503 to rotate. The rack 502 meshes with the gear 503, causing the housing 501 to move downwards until the cleaning brush 510 enters the crack. The second motor 509 then drives the cleaning brush 510 to rotate and clean the inside of the crack. Since cracks sometimes bend, the cleaning brush 510 can adjust its position according to the direction of the bend during operation, improving the adaptability of the device. By cleaning the inside of the crack, the accuracy of the crack detection data is ensured. A guide bar 505 is installed on the side of the housing 501 away from the rack 502, which increases the contact area between the housing 501 and the base 1. The cleaning brush 510 is bolted to the second motor 509, which facilitates the replacement of different cleaning brushes 510 according to the size of the crack, improving the efficiency of replacing the cleaning brush 510.

[0029] The width measuring mechanism 6 includes a bidirectional lead screw 601, a first slider 602, a third motor 603, a measuring plate 604, a first support plate 608, and a second spring 609. Movable slots 607 are provided on both sides of the base 1. The bidirectional lead screw 601 is installed inside the movable slots 607 and extends to the outside of the base 1 at both ends. The third motor 603 is connected to one end of the bidirectional lead screw 601. The other end of the bidirectional lead screw 601 is provided with a bearing seat 610, and the end of the bidirectional lead screw 601 is rotatably mounted on the bearing seat 610. There are two first sliders 602, threaded onto the bidirectional lead screws 601 in different directions. The measuring plate 604 is installed at the bottom of the first slider 602, and an L-shaped rod is installed at the top of the first slider 602. 605. The base 1 is also provided with a sliding groove 606 for the L-shaped rod 605 to move. A first support plate 608 is installed on both sides of the base 1 and below the third motor 603 and the bearing seat 610. A second spring 609 is installed at the bottom of both the bearing seat 610 and the third motor 603. The ends of the second springs 609 are installed on the first support plate 608. A second support plate 613 is installed on both sides of the base 1 and above the third motor 603 and the bearing seat 610. A T-shaped rod 614 is inserted into the outer side of the second support plate 613. A U-shaped rod 612 is movably installed on both second support plates 613. The U-shaped rod 612 has multiple through holes. The T-shaped rod 614 fixes the U-shaped rod 612 to the second support plate 613 through the through holes. When it is necessary to measure the width of the crack, the third motor 603 first drives the bidirectional lead screw 601 to rotate, causing the two first sliders 602 on the bidirectional lead screw 601 to move closer together. The measuring plate 604 and L-shaped rod 605 mounted on the first sliders 602 move accordingly. Pressing down on the U-shaped rod 612 causes the third motor 603, the shaft seat 610, and the bidirectional lead screw 601 to move downwards simultaneously until the bottom of the measuring plate 604 enters the crack. At this time, the second spring 609 is in a contracted state. Then, the T-shaped rod 614 passes through the corresponding through hole of the U-shaped rod 612 and fixes it to the second support plate 613. The third motor 603 works again, causing the two first sliders 602 to move away from each other to measure the width of the crack. The width of the crack is determined by measuring the distance between the two L-shaped rods 605. After the measurement is completed, the U-shaped rod 612 is separated from the second support plate 613. The third motor 603, the bearing 610, and the bidirectional lead screw 601 move upward to return to their initial positions under the action of the second spring 609. Pressure plates 611 are installed at both ends of the U-shaped rod 612. The pressure plates 611 increase the contact area between the U-shaped rod 612 and the third motor 603 and the bearing 610, making the force on the third motor 603 and the bearing 610 more even, which is beneficial to the movement of the third motor 603 and the bearing 610. A scale 9 is installed on one side below the L-shaped rod 605. The crack width can be quickly determined by reading the scale 9, which improves the efficiency of the work.

[0030] The detection mechanism 8 includes a fourth motor 801, a lead screw 802, a second slider 803, and a miniature camera 806. The lead screw 802 is mounted on a base 1. The fourth motor 801 is mounted on one side of the base 1 and connected to one end of the lead screw 802. The second slider 803 is threaded onto the lead screw 802. A connecting plate 804 is mounted on the bottom of the second slider 803. The miniature camera 806 is mounted on one side of the connecting plate 804 and electrically connected to the display screen 10. The captured images are transmitted to the display screen 10 via the miniature camera 806. The fourth motor 801 drives the lead screw 802 to rotate, and the second slider 803 moves on the lead screw 802, causing the miniature camera 806 to adjust its position. The device is designed to detect cracks at different locations, expanding its application range. Telescopic rods 805 are installed on both sides of the connecting plate 804. A miniature camera 806 is mounted on one of the telescopic rods 805, and a fifth motor 807 is mounted on the other. A drill bit 808 is installed at the output shaft end of the fifth motor 807. The telescopic rods 805 allow the miniature camera 806 to enter the crack for close-up observation. When the camera cannot enter the crack, the telescopic rods 805 drive the fifth motor 807 downwards, causing the drill bit 808 to rotate and drill a hole in the crack, thus facilitating the entry of the miniature camera 806.

[0031] The depth measuring mechanism 7 includes an L-shaped plate 701, an electromagnet 702, and a metal rod 705. The L-shaped plate 701 is installed above the base 1, the electromagnet 702 is installed below the top of the L-shaped plate 701, and the metal rod 705 is movably installed on the base 1 and is located directly below the electromagnet 702. A baffle 703 is installed below the base 1 and on the metal rod 705. A third spring 704 is installed above the baffle 703 and around the metal rod 705. The top of the third spring 704 is installed on the base 1. The third spring 704 is in a compressed state when the electromagnet 702 is energized. A scale 7051 is also installed on the metal rod 705 to facilitate reading the crack depth. However, when it is necessary to measure the crack depth, the electromagnet 702 is de-energized, and the metal rod 705 moves downward into the crack under the action of the third spring 704 to measure the crack depth.

[0032] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A concrete crack detection device, comprising a base, supports, wheels, and a handrail, wherein four supports are installed at the four corners below the base, the wheels are located on the outer side of the supports with two wheels at the same end rotatably mounted on the supports via a connecting shaft, the handrail is installed on one side of the base, a display screen is installed on the base near the handrail, a depth measuring mechanism is installed on one side of the display screen, and a cleaning mechanism is installed on the base away from the handrail, characterized in that... The cleaning mechanism has a width measuring mechanism on one side and a detection mechanism on the other side. Both the width measuring mechanism and the detection mechanism are mounted on the base. The cleaning mechanism includes a housing, a rack, a gear, a first motor, a guide rod, a guide block, a first spring, a second motor, and a cleaning brush. The housing is slidably mounted on a base. The rack is mounted on one side of the housing. The first motor is mounted at the bottom of the base and located on one side of the housing. The gear is mounted at the end of the output shaft of the first motor and meshes with the rack. The guide rod is mounted inside the housing. The guide block is slidably mounted on the guide rod. First springs are sleeved on both sides of the guide block and around the guide rod. One side of the first spring is mounted on the side wall of the guide block, and the other side is mounted on the inner wall of the housing. The guide block is positioned in the middle of the guide rod under the preload of the first springs on both sides. The second motor is mounted at the bottom of the guide block, and the cleaning brush is mounted on the output shaft of the second motor. The width measuring mechanism includes a bidirectional lead screw, a first slider, a third motor, a measuring plate, a first support plate, and a second spring. Movable slots are provided on both sides of the base. The bidirectional lead screw is installed inside the movable slots and extends to the outside of the base at both ends. The third motor is connected to one end of the bidirectional lead screw. A bearing seat is provided at the other end of the bidirectional lead screw, and the end of the bidirectional lead screw is rotatably mounted on the bearing seat. There are two first sliders, threaded onto the bidirectional lead screws in different directions. A measuring plate is installed at the bottom of the first slider, and an L-shaped rod is installed at the top of the first slider. A sliding groove for the L-shaped rod to move is also provided on the base. First support plates are installed on both sides of the base, below the third motor and the bearing seat. Second springs are installed at the bottom of both the bearing seat and the third motor, with the ends of the second springs mounted on the first support plates. Second support plates are installed on both sides of the base, above the third motor and the bearing seat. T-shaped rods are inserted into the outer sides of the second support plates. A U-shaped rod is movably mounted on both second support plates. The U-shaped rod has multiple through holes, and the T-shaped rod fixes the U-shaped rod to the second support plate through the through holes. The detection mechanism includes a fourth motor, a lead screw, a second slider, and a miniature camera. The lead screw is rotatably mounted on a base, and the fourth motor is mounted on one side of the base and connected to one end of the lead screw. The second slider is threaded onto the lead screw, and a connecting plate is mounted on the bottom of the second slider. The miniature camera is mounted on one side of the connecting plate and electrically connected to a display screen. The captured images are transmitted to the display screen through the miniature camera. The fourth motor drives the lead screw to rotate, and the second slider moves on the lead screw, causing the miniature camera to adjust its position. This allows for the detection of cracks in different locations, expanding the scope of application of the device. Telescopic rods are mounted on both sides of the connecting plate. The miniature camera is mounted on one of the telescopic rods, and a fifth motor is mounted on the other telescopic rod. A drill bit is mounted on the output shaft end of the fifth motor.

2. The concrete crack detection device according to claim 1, characterized in that, A guide bar is installed on the side of the housing away from the rack.

3. The concrete crack detection device according to claim 1, characterized in that, The cleaning brush is mounted on the second motor by bolts.

4. A concrete crack detection device according to claim 1, characterized in that, Pressure plates are installed at both ends of the U-shaped rod.

5. A concrete crack detection device according to claim 1, characterized in that, A ruler is installed on one side below the L-shaped rod.

6. A concrete crack detection device according to claim 1, characterized in that, The depth measuring mechanism includes an L-shaped plate, an electromagnet, and a metal rod. The L-shaped plate is installed above the base, the electromagnet is installed below the top of the L-shaped plate, and the metal rod is movably installed on the base with the metal rod directly below the electromagnet. A baffle is installed below the base and on the metal rod, and a third spring is installed above the baffle and around the metal rod. The top of the third spring is installed on the base, and the third spring is in a compressed state when the electromagnet is energized. A scale is also installed on the metal rod.

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