A device for detecting the thickness of a concrete beam reinforcement cover

Abstract

The application relates to the technical field of concrete detection equipment, and particularly discloses a thickness detection device for a concrete beam steel bar protective layer, which comprises a support frame, a positioning structure is arranged on the top of the support frame through a connecting column, a positioning ring is arranged outside the connecting column, an annular plate is arranged outside the positioning ring, a punching assembly, a detection assembly and a cleaning assembly are separately arranged on the annular plate, the distances from the punching assembly, the detection assembly and the cleaning assembly to the positioning structure are the same, a first motor is arranged, and the first motor is used for driving the annular plate to rotate around the positioning structure. The dust left in the hole is cleaned, the error is reduced, and the detection accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of concrete testing equipment technology, specifically to a device for detecting the thickness of the concrete beam reinforcement protective layer. Background Technology

[0002] The concrete cover, also known as the reinforcement cover, is a structure used to protect the reinforcing bars in concrete structures. Concrete beams also have a concrete cover. The thickness of the concrete cover refers to the distance from the outermost edge of the outermost reinforcing bar to the outer wall of the concrete beam. After construction is completed, the thickness of the concrete cover needs to be tested to determine whether it meets the standard requirements.

[0003] The inspection of the concrete cover of reinforced concrete beams mainly adopts non-destructive testing, that is, non-destructive testing instruments are used to select points for testing along the axis of the reinforcing bars. It is necessary to test the same point twice. When the difference between the two concrete cover thickness values ​​read at the same point is greater than 1 mm, the test data is invalid and two more tests need to be performed at the same point. If the requirements are still not met, the local destructive testing method can be used for verification.

[0004] The localized destructive testing method involves locally slotting or drilling at representative locations on a concrete structure to determine the protective layer. While the results are accurate, timely repairs are necessary afterward. Current methods for measuring the thickness of concrete beams involve drilling or slotting the beam and then measuring with vernier calipers. The thickness of the concrete protective layer is then calculated using the formula specified in the standard. However, this method has the following drawbacks: if dust from drilling is present in the hole, the operator inserts the caliper into it, leading to inaccurate measurements. Summary of the Invention

[0005] The purpose of this invention is to provide a device for detecting the thickness of the concrete beam reinforcement protective layer, which cleans the dust left after drilling the hole, reduces errors, and improves the accuracy of the detection.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A device for detecting the thickness of the concrete beam reinforcement protective layer includes a support frame, a positioning structure installed on the top of the support frame via a connecting column, a positioning ring installed outside the connecting column, and an annular plate surrounding the positioning ring. A drilling component, a detection component, and a cleaning component are separately installed on the annular plate, and the drilling component, the detection component, and the cleaning component are all equidistant from the positioning structure. The device also includes a first motor for driving the annular plate to rotate circumferentially along the positioning structure.

[0008] Furthermore, the annular plate is provided with four mounting boxes, the top of which is open. Each mounting box also includes a cross laser locator. The cross laser locator, the drilling assembly, the detection assembly, and the cleaning assembly are each installed separately in a mounting box. The cross laser locator, the drilling assembly, the detection assembly, and the cleaning assembly are all at the same distance from the positioning structure.

[0009] Furthermore, the cleaning assembly includes a first electric cylinder, which is installed at the bottom of the mounting box. An installation cylinder is provided at the output end of the first electric cylinder. A first spring is installed inside the installation cylinder, with its lower end fixedly connected to the installation cylinder and its upper end connected to a sliding column. The lower end of the sliding column is slidably connected to the installation cylinder, and a brush is connected to its upper end. The assembly also includes a fixing tube, which is sleeved on the outside of the sliding column, with its lower end fixedly connected to the upper end of the installation cylinder. An inclined limiting groove is provided on the side of the fixing tube, spanning 180° circumferentially. A first limiting rod is installed on the outer wall of the sliding column, passing outward through the inclined limiting groove. When the first electric cylinder pushes upward to make the brush press against the hole, the first electric cylinder is continuously driven to push upward, causing the installation cylinder and fixing tube to continue rising. Under the constraint of the inclined limiting groove, the first limiting rod spans 180° circumferentially to reach the other end of the inclined limiting groove, thereby causing the sliding column and brush to rotate 180°.

[0010] Furthermore, the brush includes a first connecting rod, the lower end of which is connected to the sliding column, and the upper end of which is connected to an installation tube. The side wall of the installation tube is provided with bristles, and a scraper is installed on the top of the cleaning tube. A pad is rotatably connected to the top of the scraper.

[0011] Furthermore, an arc-shaped block is installed on the outer wall of the sliding column, and one or more second springs are connected to the lower end of the arc-shaped block. The lower ends of the one or more second springs are connected to an arc-shaped baffle. The arc-shaped baffle is inclined, with the same inclination angle as the inclined limiting groove, and is used to block the middle section of the inclined limiting groove. A horizontal second limiting rod is provided on the outer wall of the arc-shaped baffle. It also includes a mating plate, one end of which abuts against the lower part of the second limiting rod, and the other end is fixedly connected to the inner wall of the mounting box. In the absence of external force, the arc-shaped baffle connected to the second spring blocks the middle section of the inclined limiting groove. When the first limiting column moves from the upper end to the lower end of the inclined limiting groove, it can press the arc-shaped baffle upward and then continue to move downward. When the first limiting column moves from the lower end to the upper end of the inclined limiting groove, the arc-shaped baffle locks the first limiting column.

[0012] Furthermore, the drilling assembly includes a second electric cylinder installed at the bottom of the mounting box, with a sliding plate at the output end of the second electric cylinder, the edge of which abuts against the inner wall of the mounting box; a second motor is installed on the top plate of the sliding plate, and a drill bit is connected to the output end of the second motor via a fixed post; it also includes a dust collection box, with a through hole inside the dust collection box, through which the fixed post slides and is slidably connected to the dust collection box; the lower end of the dust collection box is slidably connected to the upper end of the mounting box in the vertical direction, the upper end of the dust collection box being wider than the lower end, thus limiting the downward movement range of the dust collection box; the upper end of the dust collection box is connected to a top box via multiple third springs, with openings at both the upper and lower ends of the top box, the lower end of which is fitted over the outside of the dust collection box.

[0013] Furthermore, the detection component includes a third electric cylinder installed in the mounting box. The output end of the third electric cylinder is provided with a marking post. The marking post has a groove in the vertical direction. A slider is slidably connected in the groove. A fourth spring is installed at the lower end of the slider and is fixedly connected to the bottom of the groove. The outer surface of the marking post is provided with a thickness reading. A reading ring is provided around the marking post. The reading ring is fixedly connected to the slider. A fixing ring is fixedly sleeved on the outside of the reading ring. The diameter of the fixing ring is larger than the diameter of the hole punched by the punching component.

[0014] Furthermore, a sensor is installed on the top of the marking post, and the third electric cylinder stops driving when the sensor touches the top of the hole.

[0015] Furthermore, the first motor is fixedly installed on the side wall of the support frame, and a gear is installed at the output end of the first motor. It also includes a connecting plate, and an annular rack is provided at the bottom of the connecting plate. The gear meshes with the annular rack, and the rotation of the first motor drives the connecting plate to rotate. The upper end of the connecting plate is connected to the annular plate through multiple second connecting rods. The positioning structure includes a support rod installed on the positioning ring, and a positioning tube is connected to the upper end of the support rod through a fifth spring. The positioning tube is provided with a cross groove.

[0016] Furthermore, the support frame includes an L-shaped block installed at its bottom; it also includes a base plate with a rotating seat on it. The lower end of the L-shaped block is rotatably connected to the rotating seat via a rotating shaft. A gear is installed at one end of the rotating shaft. The frame also includes a rack block with a straight rack on its upper surface, which meshes with the gear. The bottom of the rack block is flat and abuts against the base plate. A third motor is also included, with a screw installed at its output end. The screw passes through the rack block and is threadedly connected to it. The end of the screw away from the third motor is rotatably connected to the base plate. The rotation of the third motor causes the rack block to move linearly, driving the gear to rotate, thereby causing the L-shaped block to rotate and adjust its angle.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. The positioning structure is used to fix the position of the invention. After the drilling assembly completes drilling into the concrete beam, forming a hole, the first motor rotates the annular plate, rotating the cleaning assembly to the hole position. The cleaning assembly cleans the hole, removing dust from inside. After cleaning the dust, the annular plate is rotated again, moving the detection assembly to the hole position. The detection assembly measures the hole depth, thus obtaining the thickness of the reinforcing steel protective layer. Using the cleaning assembly to remove dust from the hole reduces measurement errors.

[0019] 2. The upward movement of the brush and the circumferential rotation of the brush are two different movements. This cleaning component only uses one drive structure, that is, only the first cylinder to complete the brush advancement and drive the brush to clean dust, reducing the power source and also reducing the risk of damage to the electronic control components.

[0020] 3. The brush's advance and rotation are sequential. The brush must be pushed first, and once it reaches the appropriate position within the hole, the pushing stops before rotation begins. Conventional cleaning components require determining when to stop the brush's advance, either manually or through sensors. This cleaning structure does not require stopping the brush when it touches the hole; continuous advancement allows for brush rotation, eliminating the need to determine the stopping point and reducing the possibility of errors or erroneous operation.

[0021] 4. An arc-shaped baffle is installed. Since the upper part of the arc-shaped baffle can be squeezed open, it will not affect the brush's rotation and cleaning process when the first electric cylinder pushes upwards. However, it will lock the first limit post after the brush rotates, preventing immediate rotation during the first electric cylinder's retraction. The advantage of limiting the brush's rotation during the first electric cylinder's retraction is that the brush will not clean the holes again during the retraction process, thus preventing unnecessary dust generation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is the connection diagram for the first motor.

[0024] Figure 3 This is a cross-sectional view of the positioning structure.

[0025] Figure 4 Diagram showing the setup for the ring plate.

[0026] Figure 5 This is a cross-sectional view of the punching assembly.

[0027] Figure 6 This is an overall view of the punching assembly.

[0028] Figure 7 This is a cross-sectional view of the cleaning component.

[0029] Figure 8 This is a cross-sectional view of the cleaning component from another perspective.

[0030] Figure 9 for Figure 8 Enlarged view of point A.

[0031] Figure 10 This is a connection diagram for the upper half of the cleaning component.

[0032] Figure 11 This is a cross-sectional view of the detection component.

[0033] Figure 12 This is an overall diagram of the detection component.

[0034] The meanings of the labels in the diagram are as follows:

[0035] 1-Base plate, 2-L-shaped block, 3-Rack block,

[0036] 4-Support frame, 41-First motor, 42-First gear, 43-Connecting column, 44-Connecting plate, 45-Annular rack, 46-Second connecting rod, 47-Positioning ring, 48-Support rod, 49-Positioning tube

[0037] 50-Ring plate, 51-Mounting box, 52-Cross laser locator, 53-Drilling assembly, 5301-Second electric cylinder, 5302-Sliding plate, 5303-Second motor, 5304-Fixing column, 5305-Dust collection box, 5306-Top box, 5307-Drill bit, 54-Cleaning assembly, 5401-First electric cylinder, 5402-Mounting cylinder, 5403-Sliding column, 5404-Fixing tube, 5405-Inclined limiting groove 5406-First limiting rod, 5407-Arc-shaped block, 5408-Second spring, 5409-Arc-shaped baffle, 5410-Second limiting rod, 5411-Matching plate, 5412-First connecting rod, 5413-Mounting tube, 5414-Scraper, 5415-Gasket, 55-Detection assembly, 5501-Third electric cylinder, 5502-Marking post, 5503-Fourth spring, 5504-Reading ring, 5505-Fixing ring. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, so as to provide a better understanding of the concept of the present invention, the technical problem solved, the technical features constituting the technical solution, and the technical effects brought about.

[0039] like Figure 1 , Figure 2 , Figure 4As shown, a device for detecting the thickness of the concrete beam reinforcement protective layer includes a support frame 4. A positioning structure is installed on the top of the support frame 4 via a connecting column 43. A positioning ring 47 is installed outside the connecting column 43. An annular plate 50 is fitted over the positioning ring 47. A drilling component 53, a detection component 55, and a cleaning component 54 are separately installed on the annular plate 50. The drilling component 53, the detection component 55, and the cleaning component 54 are all equidistant from the positioning structure. The device also includes a first motor 41, which drives the annular plate 50 to rotate circumferentially along the positioning structure.

[0040] This invention features a positioning structure and an annular plate 50. A drilling component 53, a detection component 55, and a cleaning component 54 are individually mounted on the annular plate 50, and all three components are equidistant from the positioning structure. In practical operation, the positioning structure fixes the position of the invention. After the drilling component 53 drills a hole in the concrete beam, the annular plate 50 is rotated using a first motor 41, moving the cleaning component 54 to the hole's location. The cleaning component 54 then cleans the hole, removing dust. After cleaning, the annular plate 50 is rotated again, moving the detection component 55 to the hole's location. The detection component 55 measures the hole's depth, thus obtaining the thickness of the reinforcing steel protective layer. The cleaning component 54 removes dust from the hole, reducing measurement errors.

[0041] It should be noted that the thickness of the concrete cover refers to the distance from the outer edge of the outermost layer of steel bars to the outer wall of the concrete beam. Drilling is done from the outer wall of the concrete beam inwards, stopping at the outermost layer of steel bars. If the drilling operation is not performed properly, it will indeed affect the thickness measurement. However, the drilling technology is currently mature. The main problem that this invention aims to solve is the dust cleaning between drilling and measurement.

[0042] Furthermore, there are four mounting boxes 51, including a cross laser locator 52. The cross laser locator 52, drilling assembly 53, detection assembly 55, and cleaning assembly 54 are each individually installed in one mounting box 51. The distances from the cross laser locator 52, drilling assembly 53, detection assembly 55, and cleaning assembly 54 to the positioning structure are all the same. The cross laser locator 52 is used for positioning. It should be noted that the gears, ring rack 45, linear rack, cross laser locator 52, marker post 5502, and reading ring 5504 in this invention are all existing technologies, and their installation methods and control methods are also conventional designs. These will not be described in detail in this invention.

[0043] like Figures 7-10As shown, further, the cleaning assembly 54 includes a first electric cylinder 5401, which is installed at the bottom of the mounting box 51. An mounting cylinder 5402 is provided at the output end of the first electric cylinder 5401. A first spring is installed inside the mounting cylinder 5402, with its lower end fixedly connected to the mounting cylinder 5402 and its upper end connected to a sliding post 5403. The lower end of the sliding post 5403 is slidably connected to the mounting cylinder 5402, and a brush is connected to its upper end. It also includes a fixing tube 5404, which is sleeved on the outside of the sliding post 5403, with its lower end fixedly connected to the upper end of the mounting cylinder 5402. An inclined limiting groove 5405 is provided on the side of the fixed tube 5404, which spans 180° upward around the fixed tube 5404. A first limiting rod 5406 is installed on the outer wall of the sliding column 5403, which passes outward through the inclined limiting groove 5405. When the first electric cylinder 5401 pushes upward to make the brush abut against the hole, the first electric cylinder 5401 is continuously driven to push upward, causing the mounting cylinder 5402 and the fixed tube 5404 to continue to rise. Under the restriction of the inclined limiting groove 5405, the first limiting rod 5406 spans 180° circumferentially to reach the other end of the inclined limiting groove 5405, thereby causing the sliding column 5403 and the brush to rotate 180°.

[0044] The cleaning component 54 is used to clean the dust inside the hole. The working principle of the cleaning component 54 is as follows: the first electric cylinder 5401 pushes the mounting cylinder 5402 upward. During the pushing process, the mounting cylinder 5402, the sliding column 5403, the fixed tube 5404 and the brush will move upward together until the top of the brush touches the highest point of the hole. Since the brush has touched the hole, the vertical position of the brush and the sliding column 5403 will no longer change. The first electric cylinder 5401 will continue to push upward, which will compress the first spring and the mounting cylinder 5402 and the fixed tube 5404 will continue to rise, thereby causing the fixed tube 5404 and the sliding column 5403 to move relative to each other. When the fixed tube 5404 and the sliding column 5403 move relative to each other, the first limiting rod 5406 also moves relative to the fixed tube 5404. The first limiting rod 5406 passes through the inclined limiting groove 5405. As the first limiting rod 5406 moves from the higher end to the lower end of the inclined limiting groove 5405, the two ends of the inclined limiting groove 5405 cross 180° around the fixed tube 5404, causing the first limiting rod 5406 to rotate 180° circumferentially. This rotation of the first limiting rod 5406 drives the sliding column 5403 to rotate, which in turn drives the brush to rotate. At this time, the brush is located inside the hole, and the rotation of the brush cleans the dust inside the hole. Compared with conventional cleaning components 54, this cleaning assembly 54 has the following advantages: 1. The upward movement and circumferential rotation of the brush are two different movements. This cleaning assembly 54 uses only one drive structure, namely, only the first cylinder, to complete both the brush advancement and the driving of the brush for dust cleaning, reducing the power source and the risk of damage to the electronic control components. 2. The brush advancement and rotation are sequential. The brush needs to be pushed first, and once it reaches the appropriate position within the hole, the pushing stops before rotation begins. Conventional cleaning components 54 require judgment on the stopping point of the brush advancement process, which can be determined manually or by sensors. This cleaning structure does not require stopping when the brush touches the hole; continuous advancement allows the brush to rotate, avoiding the step of judging the stopping point, thus reducing the possibility of errors or erroneous operation.

[0045] Furthermore, the brush includes a first connecting rod 5412, the lower end of which is connected to the sliding column 5403, and the upper end of which is connected to an installation tube 5413. The sidewall of the installation tube 5413 is provided with bristles, and a scraper 5414 is installed on the top of the cleaning tube. A washer 5415 is rotatably connected to the top of the scraper 5414. The bristles are the main structure of the brush used for cleaning. During rotation, the bristles contact the hole wall, and the scraper 5414 scrapes the top wall of the hole to complete the cleaning. The top washer 5415 reduces wear on the brush. The washer 5415 is rotatably connected to the scraper 5414. While the bristles and scraper 5414 rotate, the washer 5415 does not rotate due to friction, resulting in lower wear.

[0046] Furthermore, an arc-shaped block 5407 is installed on the outer wall of the sliding column 5403. The lower end of the arc-shaped block 5407 is connected to one or more second springs 5408. The lower ends of the one or more second springs 5408 are connected to an arc-shaped baffle 5409. The arc-shaped baffle 5409 is inclined and has the same inclination angle as the inclined limiting groove 5405, which is used to block the middle section of the inclined limiting groove 5405. A horizontal second limiting rod 5410 is provided on the outer wall of the arc-shaped baffle 5409. It also includes a mating plate 5411. One end of the mating plate 5411 abuts against the lower part of the second limiting rod 5410, and the other end is fixedly connected to the inner wall of the mounting box 51. In the absence of external force, the arc-shaped baffle 5409 connected to the second spring 5408 blocks the middle section of the inclined limiting groove 5405. When the first limiting post moves from the upper end to the lower end of the inclined limiting groove 5405, it can press the arc-shaped baffle 5409 upward and then continue to move downward. When the first limiting post moves from the lower end to the upper end of the inclined limiting groove 5405, the arc-shaped baffle 5409 locks the first limiting post. By setting the arc-shaped baffle 5409, the upper end of the arc-shaped baffle 5409 can be directly pressed open by the first limiting post, while the lower end cannot be directly pressed open, thus restricting the first limiting post. Specifically, the arc-shaped baffle 5409 can be implemented with a smooth angle at its upper end, allowing it to be pressed open by the first limiting rod 5406. The arc-shaped baffle 5409 can also be implemented with a flat surface at its upper end, preventing it from being directly pressed open. The significance of setting the arc-shaped baffle 5409 is that, since the upper end of the arc-shaped baffle 5409 can be squeezed open, it will not affect the brush rotation cleaning process when the first electric cylinder 5401 pushes upward. However, it will lock the first limiting post after the brush rotates, and the first electric cylinder 5401 will not immediately rotate during its retraction. The advantage of limiting the brush rotation during the retraction of the first electric cylinder 5401 is that the brush will not clean the hole again during the retraction process, thus avoiding unnecessary dust generation. The first electric cylinder 5401 continues to retract until the second limiting rod 5410 is pressed against the mating plate 5411, which presses the arc-shaped baffle 5409 until it no longer blocks the inclined limiting groove 5405. At this time, the first spring is in a compressed state and will push the first limiting rod 5406 back to the upper end of the inclined limiting groove 5405. The first spring will press the first limiting rod 5406 to the upper end of the inclined limiting groove 5405 without external force. This is the initial state of the first limiting rod 5406 and the first spring.

[0047] like Figure 5 , Figure 6As shown, further, the drilling assembly 53 includes a second electric cylinder 5301 installed at the bottom of the mounting box 51. A sliding plate 5302 is provided at the output end of the second electric cylinder 5301, and the edge of the sliding plate 5302 abuts against the inner wall of the mounting box 51. A second motor 5303 is installed on the top plate of the sliding plate 5302, and a drill bit 5307 is connected to the output end of the second motor 5303 via a fixing post 5304. It also includes a dust collection box 5305, which contains a... A perforation is provided, through which the fixing post 5304 passes and is slidably connected to the dust collection box 5305. The lower end of the dust collection box 5305 is slidably connected to the upper end of the mounting box 51 in the vertical direction. The upper end of the dust collection box 5305 is wider than the lower end, limiting the downward movement range of the dust collection box 5305. The upper end of the dust collection box 5305 is connected to the top box 5306 via multiple third springs. The top box 5306 has openings at both the upper and lower ends, and the lower end of the top box 5306 is fitted over the outside of the dust collection box 5305. The drilling process is similar to the conventional drilling principle. The second electric cylinder 5301 pushes upward, and the second motor 5303 rotates, driving the drill bit 5307 to rotate, thereby completing the drilling operation. The improvement of the drilling structure of the present invention is that a dust collection box 5305 and a top box 5306 are added. The dust collection box 5305 receives the dust generated during the drilling process, and the top box 5306 is used to cover the drilling area to prevent dust from splashing. The top box 5306 and the dust collection box 5305 are connected by a third spring. When the top box 5306 presses against the top of the hole, it has a certain self-adjusting ability to avoid wear of the top box 5306 caused by compression.

[0048] like Figure 11 , Figure 12As shown, the detection component 55 further includes a third electric cylinder 5501 installed in the mounting box 51. The output end of the third electric cylinder 5501 is provided with a marking post 5502. The marking post 5502 is provided with a groove in the vertical direction. A slider is slidably connected in the groove. A fourth spring 5503 is installed at the lower end of the slider. The fourth spring 5503 is fixedly connected to the bottom of the groove. The outer surface of the marking post 5502 is provided with a thickness reading. A reading ring 5504 is provided on the outer sleeve of the marking post 5502. The reading ring 5504 is fixedly connected to the slider. A fixing ring 5505 is fixedly sleeved on the outer side of the reading ring 5504. The diameter of the fixing ring 5505 is larger than the diameter of the hole punched by the punching component 53. The third electric cylinder 5501 pushes the marker post 5502 upwards. When the top of the marker post 5502 touches the top of the hole, the third electric cylinder 5501 stops pushing. Since the diameter of the fixing ring 5505 is larger than the diameter of the hole drilled by the drilling assembly 53, the fixing ring 5505 will be stuck on the outer wall of the concrete beam. The thickness can be measured by observing the position of the fixing ring 5505 at the thickness reading. The accurate thickness calculation should be from the upper surface of the fixing ring 5505 to the top of the marker post 5502. Conventionally, because the fixing ring 5505 obscures the upper end of the marker post 5502, observation can only be made from the lower end of the marker post 5502. There are several ways to increase the measurement accuracy. One is to pre-calculate the thickness of the fixing ring 5505, observe the corresponding scale on the lower surface of the fixing ring 5505, and subtract the values ​​to obtain the final value. Another method is to use a transparent fixing ring 5505, observing the corresponding scale on the upper surface of the fixing ring 5505 from below. When the marker post 5502 exits the hole, the fourth spring 5503 pushes the slider, reading ring 5504 and fixing ring 5505 to reset.

[0049] like Figure 3 As shown, furthermore, a sensor is installed on the top of the marking post 5502. When the sensor touches the top of the hole, the driving of the third electric cylinder 5501 stops. By setting up the sensor, the controller can determine the stopping time of the third electric cylinder 5501, reducing the error of human operation.

[0050] Furthermore, the first motor 41 is fixedly mounted on the side wall of the support frame 4. A gear is installed at the output end of the first motor 41. A connecting plate 44 is also included, with a ring rack 45 at its bottom. The gear meshes with the ring rack 45, and the rotation of the first motor 41 drives the connecting plate 44 to rotate. The upper end of the connecting plate 44 is connected to the annular plate 50 via multiple second connecting rods 46. The positioning structure includes a support rod 48 mounted on the positioning ring 47. The upper end of the support rod 48 is connected to a positioning tube 49 via a fifth spring, and the positioning tube 49 has a cross groove. The gear and ring rack 45 serve as the specific connecting structure, achieving the effect of the first motor 41 driving the annular plate 50 to rotate. The positioning tube 49 in the positioning structure has a cross groove to position the axis of the reinforcing bar, facilitating the drilling of a second hole. The positioning tube 49 and the support rod 48 are connected by a fifth spring and can be compressed.

[0051] Furthermore, the support frame 4 has an L-shaped block 2 installed at its bottom; it also includes a base plate 1 with a rotating seat on it. The lower end of the L-shaped block 2 is rotatably connected to the rotating seat via a rotating shaft. A gear is installed at one end of the rotating shaft. The support frame also includes a rack block 3 with a straight rack on its upper surface. The straight rack meshes with the gear. The bottom of the rack block 3 is flat and abuts against the base plate 1. The support frame also includes a third motor with a screw installed at its output end. The screw passes through the rack block 3 and is threadedly connected to it. The end of the screw away from the third motor is rotatably connected to the base plate 1. When the third motor rotates, the rack block 3 moves linearly, which drives the gear to rotate, thereby causing the L-shaped block 2 to rotate and adjust its angle. A third motor is installed. The rotation of the third motor drives the screw to rotate. When the screw rotates, the rack block 3, which is threadedly connected to the screw, cannot rotate due to its bottom contact with the base plate 1. Therefore, the rotation of the screw causes the rack block 3 to move axially along the screw, which in turn causes the linear rack on the rack block 3 to drive the gear to rotate, thus adjusting the angle of the L-shaped block 2. This, in turn, adjusts the angles of the support frame 4, the drilling assembly 53, the detection assembly 55, and the cleaning assembly 54. The third motor has a self-locking function; when the third motor stops, its output shaft will not rotate, preventing the rack block 3 and the L-shaped block 2 from moving or rotating when the third motor stops.

[0052] The terms "connection" and "fixing" appearing in the description of this invention can refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meaning of the above terms in this invention should be understood according to the specific circumstances.

[0053] In the description of this invention, the terms "center," "upper," "lower," "horizontal," "inner," and "outer," etc., are used only to indicate the orientation or positional relationship for the convenience of describing this invention and to simplify the description, and do not indicate or imply a specific orientation that the device or element referred to must have, and therefore should not be construed as a limitation of this invention.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detecting the thickness of the concrete beam reinforcement protective layer, characterized in that: Includes a support frame (4), the top of the support frame (4) is equipped with a positioning structure via a connecting column (43), the top of the connecting column (43) is equipped with a positioning ring (47), the outer wall of the positioning ring (47) is fitted with an annular plate (50), and a drilling component (53), a detection component (55) and a cleaning component (54) are respectively installed on the annular plate (50). The drilling component (53), the detection component (55) and the cleaning component (54) are all at the same distance from the positioning structure. It also includes a first motor (41), which is used to drive the annular plate (50) to rotate circumferentially along the positioning structure; The annular plate (50) is provided with four mounting boxes (51). The top of the mounting box (51) is open and includes a cross laser locator (52). The cross laser locator (52), the drilling component (53), the detection component (55) and the cleaning component (54) are installed separately in one mounting box (51). The cross laser locator (52), the drilling component (53), the detection component (55) and the cleaning component (54) are all at the same distance from the positioning structure. The cleaning assembly (54) includes a first electric cylinder (5401), which is installed at the bottom of the mounting box (51), and the output end of the first electric cylinder (5401) is provided with a mounting cylinder (5402). The mounting cylinder (5402) is equipped with a first spring. The lower end of the first spring is fixedly connected to the mounting cylinder (5402). The upper end of the first spring is connected to a sliding column (5403). The lower end of the sliding column (5403) is slidably connected to the mounting cylinder (5402). The upper end of the sliding column (5403) is connected to a brush. The mounting cylinder also includes a fixing tube (5404). The fixing tube (5404) is sleeved on the outside of the sliding column (5403). The lower end of the fixing tube (5404) is fixedly connected to the upper end of the mounting cylinder (5402). An inclined limiting groove (5405) is provided on the side of the fixed tube (5404), and the inclined limiting groove (5405) spans 180° around the fixed tube (5404); a first limiting rod (5406) ​​is installed on the outer wall of the sliding column (5403), and the first limiting rod (5406) ​​passes outward through the inclined limiting groove (5405); When the first electric cylinder (5401) pushes upward to make the brush press against the hole, the first electric cylinder (5401) is continuously driven to push upward, causing the mounting cylinder (5402) and the fixing tube (5404) to continue to rise. Under the restriction of the inclined limiting groove (5405), the first limiting rod (5406) ​​crosses 180° circumferentially to reach the other end of the inclined limiting groove (5405), thereby causing the sliding column (5403) and the brush to rotate 180°.

2. The device for detecting the thickness of the concrete beam reinforcement protective layer according to claim 1, characterized in that: The brush includes a first connecting rod (5412), the lower end of which is connected to the sliding column (5403), the upper end of which is connected to an installation tube (5413), the side wall of which is provided with bristles, and a scraper (5414) installed on the top of the cleaning tube, with a washer (5415) rotatably connected to the top of the scraper (5414).

3. The device for detecting the thickness of the concrete beam reinforcement protective layer according to claim 1, characterized in that: An arc-shaped block (5407) is installed on the outer wall of the sliding column (5403). The lower end of the arc-shaped block (5407) is connected to one or more second springs (5408). The lower ends of the one or more second springs (5408) are connected to an arc-shaped baffle (5409). The arc-shaped baffle (5409) is inclined and has the same inclination angle as the inclined limiting groove (5405), and is used to block the middle section of the inclined limiting groove (5405). The outer wall of the arc-shaped baffle (5409) is provided with a horizontal second limiting rod (5410); it also includes a mating plate (5411), one end of which abuts against the lower part of the second limiting rod (5410), and the other end is fixedly connected to the inner wall of the mounting box (51); In the absence of external force, the arc-shaped baffle (5409) connected to the second spring (5408) blocks the middle section of the inclined limiting groove (5405). When the first limiting post moves from the upper end to the lower end of the inclined limiting groove (5405), it can push the arc-shaped baffle (5409) upward and then continue to move downward. When the first limiting post moves from the lower end to the upper end of the inclined limiting groove (5405), the arc-shaped baffle (5409) locks the first limiting post.

4. The device for detecting the thickness of the concrete beam reinforcement protective layer according to claim 1, characterized in that: The drilling assembly (53) includes a second electric cylinder (5301) installed at the bottom of the mounting box (51). The output end of the second electric cylinder (5301) is provided with a sliding plate (5302), and the edge of the sliding plate (5302) abuts against the inner wall of the mounting box (51). A second motor (5303) is installed on the top plate of the sliding plate (5302), and the output end of the second motor (5303) is connected to a drill bit (5307) through a fixing column (5304). It also includes a dust collection box (5305), which has a perforation inside. A fixing column (5304) passes through the perforation and is slidably connected to the dust collection box (5305). The lower end of the dust collection box (5305) is slidably connected to the upper end of the mounting box (51) in the vertical direction. The upper end of the dust collection box (5305) is wider than the lower end, which limits the downward movement range of the dust collection box (5305). The upper end of the dust collection box (5305) is connected to a top box (5306) by multiple third springs. The upper and lower ends of the top box (5306) are provided with openings. The lower end of the top box (5306) is fitted over the outside of the dust collection box (5305).

5. The device for detecting the thickness of the concrete beam reinforcement protective layer according to claim 1, characterized in that: The detection component (55) includes a third electric cylinder (5501) installed in the mounting box (51). The output end of the third electric cylinder (5501) is provided with a marker post (5502). The marker post (5502) is provided with a groove in the vertical direction. A slider is slidably connected in the groove. A fourth spring (5503) is installed at the lower end of the slider. The fourth spring (5503) is fixedly connected to the bottom of the groove. The outer surface of the marker post (5502) is provided with a thickness reading; the marker post (5502) is covered with a reading ring (5504), the reading ring (5504) is fixedly connected to the slider, and a fixing ring (5505) is fixedly sleeved on the outer side of the reading ring (5504), the diameter of the fixing ring (5505) is larger than the diameter of the hole punched by the punching assembly (53).

6. The device for detecting the thickness of the concrete beam reinforcement protective layer according to claim 5, characterized in that: A sensor is installed on the top of the marker post (5502). When the sensor touches the top of the hole, the drive of the third electric cylinder (5501) is stopped.

7. The device for detecting the thickness of the concrete beam reinforcement protective layer according to claim 1, characterized in that: The first motor (41) is fixedly installed on the side wall of the support frame (4). The output end of the first motor (41) is equipped with a first gear (42) and also includes a connecting plate (44). The bottom of the connecting plate (44) is provided with an annular rack (45). The first gear (42) meshes with the annular rack (45). The first motor (41) rotates and drives the connecting plate (44) to rotate. The upper end of the connecting plate (44) is connected to the annular plate (50) via multiple second connecting rods (46); The positioning structure includes a support rod (48) installed on the positioning ring (47), and a positioning tube (49) is connected to the upper end of the support rod (48) by a fifth spring. A cross groove is provided on the positioning tube (49).

8. The device for detecting the thickness of the concrete beam reinforcement protective layer according to claim 1, characterized in that: An L-shaped block (2) is installed at the bottom of the support frame (4); It also includes a base plate (1), on which a rotating seat is provided. The lower end of the L-shaped block (2) is rotatably connected to the rotating seat via a rotating shaft. A second gear is installed at one end of the rotating shaft. It also includes a rack block (3), on which a straight rack is provided on the upper surface. The straight rack meshes with the second gear. The bottom of the rack block (3) is a plane, and the bottom plane of the rack block (3) abuts against the base plate (1). It also includes a third motor, on the output end of which a screw is installed. The screw passes through the rack block (3) and is threadedly connected to the rack block (3). The end of the screw away from the third motor is rotatably connected to the base plate (1). The third motor rotates, causing the rack block (3) to move linearly, which drives the gear to rotate, thereby causing the L-shaped block (2) to rotate and adjust the angle.

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