Structural concrete reinforcement protective layer thickness detector

Abstract

The invention belongs to the technical field of engineering detection, and discloses a structural concrete reinforcement protective layer thickness detector, which comprises a main body, and a mapping lamp is arranged on the outer surface of the main body; the marking mechanism is arranged in the main body, the marking mechanism comprises an electric push rod, and an output shaft of the electric push rod is fixedly provided with a supporting groove; two gears are driven by a driving motor to rotate, the two gears can drive two rotating discs to rotate, then belts are wound on the surfaces of the rotating discs, then the belts pull a fixing shell and a graphite pen refill to move relatively, a straight line can be drawn in the moving process of the graphite pen refill, and therefore the position of a reinforcing steel bar is marked; and finally, the graphite refill is driven to move through the driving gear, so that the reinforcing steel bar is marked, the tedious step of manual marking of an operator is omitted, the workload of the operator is greatly reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering detection, and in particular is a detector for the thickness of a structural concrete steel bar protective layer. Background Art

[0002] Concrete steel bar protection layer thickness detector, also known as steel bar protection layer tester or steel bar meter, is mainly used to measure the thickness of steel bar protection layer in concrete structure, as well as the location, diameter and distribution of steel bars;

[0003] Currently, it is placed directly on the surface of the concrete structure. Once the built-in sensor of the instrument detects the steel bars inside the concrete, indicator lights will light up on both sides of the instrument. These lights will form obvious marks on the concrete surface, indicating the approximate location of the steel bars. At this time, the operator needs to intervene manually and use a marking pen to draw horizontal lines at the position indicated by the light to mark the specific location of each steel bar.

[0004] However, in complex steel bar layouts, there are a large number of steel bars and they are densely distributed. Operators have to move the detector repeatedly to find and mark the position of each steel bar one by one. During this process, the operator often needs to hold the detector tightly with one hand to ensure its stability and accurately capture the steel bar signal, while the other hand is responsible for holding the pen for marking. This operation method not only increases the physical exertion of the operator, but also greatly limits the detection efficiency. Summary of the invention

[0005] In order to solve the problem in the above background technology that operators manually mark the positions of steel bars, which greatly increases the workload of operators and reduces detection efficiency, the present invention provides a structural concrete steel bar protective layer thickness detector.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a structural concrete steel bar protective layer thickness detector, comprising a main body, the outer surface of which is provided with a mapping light;

[0007] The marking mechanism is arranged inside the main body, and the marking mechanism includes an electric push rod, the output shaft of the electric push rod is fixedly installed with a support groove, the interior of the support groove is slidably connected with two support blocks, the bottom ends of the two support blocks are fixedly installed with two fixed shells, the interiors of the two fixed shells are fixedly installed with two fixed rods, the surfaces of the fixed rods are slidably sleeved with sliders, the bottom ends of the sliders are fixedly installed with a fixing fixture located at the bottom end of the fixing shell, a graphite pen core is arranged on one side of the fixing fixture close to the center of the fixing shell, two belts are fixedly installed on opposite sides of the two fixing shells, and one end of the two belts is fixedly connected to the surfaces of the two rotating disks;

[0008] A mounting plate is fixedly installed inside the support groove, and a spring is fixedly installed on the side of the mounting plate opposite to the support block. Two rotating disks are rotatably connected inside the support groove, and two gears are fixedly installed on the top of the two rotating disks, and the two gears are meshed with each other. A motor is fixedly installed on the top of the support groove, and the output end of the motor is fixedly connected to one side of the gear.

[0009] Preferably, it also includes: a fixing mechanism, which is arranged inside the fixed shell, the fixing mechanism includes a connecting plate 1, the connecting plate 1 is fixedly connected to the inside of the fixed shell, the connecting plate 1 is rotatably connected inside the connecting plate, a threaded rod is threadedly sleeved on the surface of the threaded rod with a threaded block, one end of the threaded rod is fixedly installed with a rotating rod, a sliding groove is provided on the surface of the rotating rod, a sliding shell is slidably sleeved inside the rotating rod, a ball located inside the sliding groove is rollingly connected inside the sliding shell, and a hinge block is fixedly installed on one side of the two sliders, and the hinge block and the threaded block are hinged through a hinge rod.

[0010] Preferably, a square plate is fixedly installed inside the fixed shell, a spring 2 is fixedly installed on one side of the square plate, a connecting plate 2 is fixedly installed on one end of the spring 2, and the bottom end of the connecting plate 2 is fixedly connected to the surface of the sliding shell.

[0011] Preferably, the other end of the screw rod is fixedly mounted with a limiting ring located on both sides of the connecting plate one, the number of the limiting rings is two, and the opposite sides of the two limiting rings are in contact with the surface of the connecting plate one.

[0012] Preferably, a limiting groove is provided inside the fixing shell, and a limiting block is slidably connected inside the limiting groove.

[0013] Preferably, rollers are fixedly mounted on both ends of the main body, the number of the rollers is four, and the roller arrays are distributed at both ends of the main body.

[0014] Preferably, the fixing clamps are grouped in pairs, the fixing clamps are arc-shaped, and the surface of the fixing clamps fully fits the surface of the graphite pen core, and the surface of the fixing clamps is rough.

[0015] Preferably, the support block is T-shaped, and the surface of the support block fully fits the inner wall of the support groove.

[0016] Preferably, the slide groove is designed to be curved, and the surface of the ball is fully in contact with the inner wall of the slide groove, and the surface of the ball is designed to be smooth.

[0017] Preferably, the square plate is arranged at the top ends of the threaded block and the hinged rod, and a gap is provided between the hinged rod and the square plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention drives two gears to rotate by driving a motor, and the two gears drive two rotating disks to rotate, and then the rotating disk wraps a belt around its surface, and then the belt pulls the fixed shell and the graphite pen core to move relative to each other, and in the process of the graphite pen core moving, a straight line is drawn, thereby marking the position of the steel bar, and finally the graphite pen core is moved by driving the gears, thereby marking the steel bar, eliminating the tedious steps of manual marking by the operator, thereby greatly reducing the workload of the operator and improving the efficiency of detection;

[0020] The present invention enables the ball to move along the inner wall of the slide groove by pressing the sliding shell. When the sliding shell moves, the spring 2 will be compressed, and the slide groove is designed to be curved, so that when the ball moves, the rotating rod will be driven to rotate, the rotating rod will drive the screw rod to rotate, the threaded block will move on the surface of the screw rod, and then the threaded block will drive the hinge rod to rotate, the hinge rod will push the hinge block, the slider and the fixing fixture to move towards each other, and then the graphite pen core can be replaced, and finally the sliding shell is pressed to cancel the fixing of the graphite pen core by the fixing fixture, so that the operator can more easily and conveniently replace the graphite pen core worn out due to long-term use, thereby greatly improving the practicality and flexibility of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the squint instrument of the present invention;

[0023] Figure 3 It is a schematic diagram of a cross-section of the main body of the present invention;

[0024] Figure 4 It is a schematic diagram of a cross-sectional support groove of the present invention;

[0025] Figure 5 It is a schematic diagram of a cross-sectional fixed shell of the present invention;

[0026] Figure 6 It is a schematic diagram of a cross-sectional sliding shell of the present invention;

[0027] Figure 7 It is a schematic diagram showing the limiting groove of the present invention.

[0028] In the figure: 1. main body; 2. mapping light; 3. electric push rod; 4. supporting groove; 5. supporting block; 6. fixing shell; 7. fixing rod; 8. sliding block; 9. fixing fixture; 10. mounting plate; 11. spring 1; 12. rotating disk; 13. belt; 14. gear; 15. motor; 16. graphite pen core; 17. connecting plate 1; 18. screw rod; 19. threaded block; 20. rotating rod; 21. slide groove; 22. sliding shell; 23. ball; 24. hinge block; 25. hinge rod; 26. square plate; 27. connecting plate 2; 28. spring 2; 29. ​​limit ring; 30. limit groove; 31. limit block; 32. roller. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 7 As shown, the present invention provides a structural concrete steel bar protective layer thickness detector, comprising a main body 1, and a mapping light 2 is provided on the outer surface of the main body 1;

[0031] The marking mechanism is arranged inside the main body 1, and includes an electric push rod 3, the output shaft of the electric push rod 3 is fixedly installed with a support groove 4, the inside of the support groove 4 is slidably connected with two support blocks 5, the bottom ends of the two support blocks 5 are fixedly installed with two fixed shells 6, the insides of the two fixed shells 6 are fixedly installed with two fixed rods 7, the surfaces of the fixed rods 7 are slidably sleeved with sliders 8, the bottom ends of the sliders 8 are fixedly installed with a fixing fixture 9 located at the bottom end of the fixing shell 6, a graphite pen core 16 is arranged on one side of the fixing fixture 9 close to the center of the fixing shell 6, two belts 13 are fixedly installed on the opposite sides of the two fixing shells 6, and one end of the two belts 13 is fixedly connected to the surfaces of the two rotating disks 12;

[0032] A mounting plate 10 is fixedly installed inside the support groove 4, and a spring 11 is fixedly installed on the side of the mounting plate 10 opposite to the support block 5. Two rotating disks 12 are rotatably connected inside the support groove 4, and two gears 14 are fixedly installed on the top of the two rotating disks 12, and the two gears 14 are meshed with each other. A motor 15 is fixedly installed on the top of the support groove 4, and the output end of the motor 15 is fixedly connected to one side of the gear 14.

[0033] The above scheme is adopted: the operator places the main body 1 in the test area, and then the main body 1 can be moved on the surface of the concrete. When the instrument detects the steel bar, the mapping light 2 arranged on the surface of the main body 1 will map the light on the surface of the concrete, and then the electric push rod 3 can be driven to make its output shaft push the support groove 4 to move, and the support groove 4 will drive the fixed shell 6 and the graphite pen core 16 to move, and then the surface of the graphite pen core 16 will contact the surface of the concrete;

[0034] At the same time, the motor 15 can be driven to rotate the gear 14. Since the two gears 14 are meshed with each other, the gear 14 will drive the other gear 14 to rotate, and then the two gears 14 will simultaneously drive the two rotating disks 12 to rotate. Since one end of the two belts 13 is fixedly connected to the surfaces of the two rotating disks 12, when the rotating disks 12 rotate, the rotating disks 12 will wrap the belts 13 around their surfaces, and then the wrapped belts 13 will pull the two fixed shells 6 to move relative to each other. When the fixed shells 6 move, the support block 5 will slide inside the support groove 4, and then the support groove 4 will squeeze the spring 11, and then the fixed shells 6 It will also drive the fixed rod 7, the slider 8 and the fixed clamp 9 to move, and the fixed clamp 9 will drive the graphite pen core 16 to move. Since the surface of the graphite pen core 16 is in contact with the surface of the concrete, the position of the steel bar will be marked when the graphite pen core 16 moves. After all the steel bars are marked, the main body 1 can be placed at the mark again, and then the main body 1 will measure the thickness of the steel bar protective layer. Finally, the graphite pen core 16 is moved by the driving gear 14 to mark the steel bar, eliminating the tedious steps of manual marking for the operator, thereby greatly reducing the workload of the operator and improving the efficiency of detection.

[0035] like Figure 5 , Figure 6 and Figure 7 As shown, it also includes: a fixing mechanism, which is arranged inside the fixed shell 6, the fixing mechanism includes a connecting plate 17, the connecting plate 17 is fixedly connected to the inside of the fixed shell 6, the inside of the connecting plate 17 is rotatably connected with a screw rod 18, the surface of the screw rod 18 is threadedly sleeved with a threaded block 19, one end of the screw rod 18 is fixedly installed with a rotating rod 20, the surface of the rotating rod 20 is provided with a sliding groove 21, the inside of the rotating rod 20 is slidably sleeved with a sliding shell 22, the inside of the sliding shell 22 is rollingly connected with a ball 23 located inside the sliding groove 21, and one side of the two sliders 8 is fixedly installed with a hinge block 24, and the hinge block 24 and the threaded block 19 are hinged through a hinge rod 25.

[0036] The above scheme is adopted: through the design of the fixing mechanism, when the graphite pen core 16 needs to be replaced after long-term use, the sliding shell 22 can be pressed, and then the sliding shell 22 will slide on the surface of the rotating rod 20, and in the process of the sliding shell 22 moving, it will drive the ball 23 to slide inside the slide groove 21, and in the process of the ball 23 sliding along the slide groove 21, it will drive the rotating rod 20 to rotate, and the rotating rod 20 will drive the screw rod 18 to rotate. Since the screw rod 18 is threadedly connected with the threaded block 19, when the screw rod 18 rotates, the threaded block 19 will move on the surface of the screw rod 18. Since the threaded block 19 is hinged to the hinge block 24 through the hinge rod 25, when the threaded block 19 moves, it will drive the hinge block 24 to rotate. When the rod 25 rotates, the hinge rod 25 will push the two hinge blocks 24 to move toward each other, and the hinge blocks 24 will drive the slider 8 to move on the surface of the fixed rod 7. The slider 8 will drive the fixing fixture 9 to move toward each other, and then the fixing fixture 9 will cancel the fixation of the graphite refill 16. Then the operator can put the unused graphite refill 16 back into the fixing fixture 9, and then fix it, and then continue the marking work. Finally, by pressing the sliding shell 22, the fixing fixture 9 cancels the fixation of the graphite refill 16, so that the operator can more easily and conveniently replace the graphite refill 16 worn out due to long-term use, thereby greatly improving the practicality and flexibility of the instrument.

[0037] like Figure 5 and Figure 6 As shown, a square plate 26 is fixedly installed inside the fixed shell 6, a spring 28 is fixedly installed on one side of the square plate 26, a connecting plate 27 is fixedly installed on one end of the spring 28, and the bottom end of the connecting plate 27 is fixedly connected to the surface of the sliding shell 22, and the other end of the screw rod 18 is fixedly installed with a limiting ring 29 located on both sides of the connecting plate 17, the number of the limiting rings 29 is two, and the opposite sides of the two limiting rings 29 are in contact with the surface of the connecting plate 17.

[0038] The above scheme is adopted: through the design of the square plate 26, the second connecting plate 27 and the second spring 28, when the sliding shell 22 moves, the sliding shell 22 will drive the second connecting plate 27 to move, and then the second connecting plate 27 will squeeze the second spring 28. After the graphite refill 16 is replaced, the sliding shell 22 can be loosened, and then the compressed second spring 28 will push the second connecting plate 27 and the sliding shell 22 to reset, and then the fixing fixture 9 will fix the graphite refill 16 again. Through the design of the limiting ring 29, when the screw rod 18 rotates, the two limiting rings 29 will also rotate. Since the opposite sides of the limiting rings 29 are in contact with the surface of the first connecting plate 17, the screw rod 18 can be limited and supported when it rotates, ensuring that the screw rod 18 can rotate stably.

[0039] like Figure 1 , Figure 2 and Figure 7 As shown, a limiting groove 30 is provided inside the fixed shell 6, and a limiting block 31 is slidably connected inside the limiting groove 30. Rollers 32 are fixedly installed at both ends of the main body 1. There are four rollers 32, and the rollers 32 are arrayed at both ends of the main body 1.

[0040] The above scheme is adopted: through the design of the limit groove 30 and the limit block 31, when the threaded block 19 moves, the limit block 31 will be driven to slide inside the limit groove 30. Since the surface of the limit block 31 fits the inner wall of the limit groove 30, the moving limit block 31 can limit the threaded block 19. Through the limitation of the limit block 31, the threaded block 19 can move normally. Through the design of the roller 32, when the main body 1 is placed on the concrete surface, the surface of the roller 32 will contact the surface of the concrete, and when the main body 1 moves, the roller 32 will rotate. Through the rotation of the roller 32, it can move more smoothly on the concrete surface.

[0041] like Figure 4 and Figure 6 As shown, the fixing clamps 9 are grouped into two each, the fixing clamps 9 are arc-shaped, and the surface of the fixing clamps 9 fully fits the surface of the graphite refill 16 , the surface of the fixing clamps 9 is rough, the support block 5 is T-shaped, and the surface of the support block 5 fully fits the inner wall of the support groove 4 .

[0042] The above scheme is adopted: through the design of the fixing fixture 9, since the fixing fixture 9 is an arc-shaped design, the fixing effect of the graphite refill 16 can be increased, and the surface of the fixing fixture 9 is a rough design, which can increase the friction between the graphite refill 16, so that when the fixing fixture 9 drives the graphite refill 16 to move, the graphite refill 16 will not be separated from the inside of the fixing fixture 9, and through the design of the support block 5, since the support block 5 is a T-shaped design, when the support block 5 moves, the fixed shell 6 can be supported to prevent the support block 5 from being separated from the inside of the support groove 4 when the support block 5 moves.

[0043] like Figure 5 and Figure 6 As shown, the slide groove 21 is of curved design, and the surface of the ball 23 is fully fitted with the inner wall of the slide groove 21, the surface of the ball 23 is of smooth design, the square plate 26 is arranged at the top of the threaded block 19 and the hinge rod 25, and a gap is provided between the hinge rod 25 and the square plate 26.

[0044] The above scheme is adopted: through the design of the slide groove 21 and the ball 23, since the slide groove 21 is a curved design, when the ball 23 moves, the ball 23 will move along the inner wall of the slide groove 21, and then the rotating rod 20 will rotate, and the surface of the ball 23 is a smooth design, so that the ball 23 can move more smoothly. Through the design of the square plate 26 and the hinged rod 25, since the square plate 26 is arranged at the top of the threaded block 19 and the hinged rod 25, and a gap is provided between the hinged rod 25 and the square plate 26, when the hinged rod 25 rotates, it will not interfere with the square plate 26, thereby ensuring that the threaded block 19 can move normally.

[0045] The working principle and use process of the present invention:

[0046] First, the operator can place the main body 1 in the test area, and then the roller 32 will contact the surface of the concrete, and then the main body 1 can be pushed to move on the surface of the concrete. When the main body 1 detects the steel bar, the mapping light 2 will map the light to the surface of the concrete. At this time, the electric push rod 3 can be driven to make the graphite pen core 16 contact the surface of the concrete, and then the motor 15 can be driven to rotate the two gears 14. The two gears 14 will drive the two rotating disks 12 to rotate, and then the rotating disk 12 will wrap the belt 13 on its surface, and then the belt 13 will pull the fixed shell 6 and the graphite pen core 16 to move relative to each other. During the movement of the graphite pen core 16, a straight line will be drawn to mark the position of the steel bar. After all the steel bar positions are marked, the main body 1 can be placed at the mark again, and then the main body 1 can measure the thickness of the steel bar protective layer;

[0047] When the graphite refill 16 needs to be replaced after being used for a long time, the sliding shell 22 can be pressed to make the ball 23 move along the inner wall of the slide groove 21. When the sliding shell 22 moves, the spring 28 will be compressed, and the slide groove 21 is designed to be curved, so that when the ball 23 moves, the rotating rod 20 will be driven to rotate, and the rotating rod 20 will drive the screw rod 18 to rotate, and the threaded block 19 will move on the surface of the screw rod 18, and then the threaded block 19 will drive the hinge rod 25 to rotate, and the hinge rod 25 will push the hinge block 24, the slider 8 and the fixing fixture 9 to move toward each other, and the fixing fixture 9 will cancel the fixation of the graphite refill 16, and then the unused graphite refill 16 can be placed in the interior of the fixing fixture 9, and then the sliding shell 22 can be loosened, and then the compressed spring 28 will push the sliding shell 22 and the ball 23 to reset, and then the fixing fixture 9 will fix the graphite refill 16 again, and then the marking work can be continued, and finally the operation process is completed.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A structural concrete reinforcement protective layer thickness detector, comprising a main body (1), characterized in that: A mapping light (2) is provided on the outer surface of the main body (1); A marking mechanism is arranged inside a main body (1), the marking mechanism comprises an electric push rod (3), the output shaft of the electric push rod (3) is fixedly installed with a support groove (4), the interior of the support groove (4) is slidably connected with two support blocks (5), the bottom ends of the two support blocks (5) are fixedly installed with two fixed shells (6), the interiors of the two fixed shells (6) are fixedly installed with two fixed rods (7), the surfaces of the fixed rods (7) are slidably sleeved with a slider (8), the bottom ends of the sliders (8) are fixedly installed with a fixing fixture (9) located at the bottom end of the fixing shell (6), a graphite pen core (16) is arranged on one side of the fixing fixture (9) close to the center of the fixing shell (6), two belts (13) are fixedly installed on opposite sides of the two fixing shells (6), and one end of the two belts (13) is fixedly connected to the surfaces of two rotating disks (12); A mounting plate (10) is fixedly mounted inside the support groove (4), and a spring (11) is fixedly mounted on one side of the mounting plate (10) opposite to the support block (5). Two rotating disks (12) are rotatably connected inside the support groove (4), and two gears (14) are fixedly mounted on the top ends of the two rotating disks (12), and the two gears (14) are meshed with each other. A motor (15) is fixedly mounted on the top end of the support groove (4), and the output end of the motor (15) is fixedly connected to one side of the gear (14).

2. The structural concrete reinforcement protective layer thickness detector according to claim 1 is characterized in that: The invention also comprises: a fixing mechanism, which is arranged inside the fixing shell (6), the fixing mechanism comprises a connecting plate (17), the connecting plate (17) is fixedly connected to the inside of the fixing shell (6), a screw rod (18) is rotatably connected inside the connecting plate (17), a threaded block (19) is threadedly sleeved on the surface of the screw rod (18), a rotating rod (20) is fixedly installed at one end of the screw rod (18), a sliding groove (21) is provided on the surface of the rotating rod (20), a sliding shell (22) is slidably sleeved inside the rotating rod (20), a ball (23) located inside the sliding groove (21) is rollingly connected inside the sliding shell (22), and a hinge block (24) is fixedly installed on one side of the two sliding blocks (8), and the hinge block (24) is hinged to the threaded block (19) through a hinge rod (25).

3. The structural concrete reinforcement protective layer thickness detector according to claim 1 is characterized in that: A square plate (26) is fixedly installed inside the fixed shell (6), a spring 2 (28) is fixedly installed on one side of the square plate (26), a connecting plate 2 (27) is fixedly installed on one end of the spring 2 (28), and the bottom end of the connecting plate 2 (27) is fixedly connected to the surface of the sliding shell (22).

4. The structural concrete reinforcement protective layer thickness detector according to claim 2 is characterized in that: The other end of the screw rod (18) is fixedly mounted with a limiting ring (29) located on both sides of the connecting plate (17), the number of the limiting rings (29) is two, and the opposite sides of the two limiting rings (29) are in contact with the surface of the connecting plate (17).

5. The structural concrete reinforcement protective layer thickness detector according to claim 1 is characterized by: A limiting groove (30) is provided inside the fixed shell (6), and the limiting groove (30) is slidably connected inside with a limiting block (31).

6. The structural concrete reinforcement protective layer thickness detector according to claim 1 is characterized by: Rollers (32) are fixedly mounted on both ends of the main body (1), the number of the rollers (32) is four, and the rollers (32) are arranged in an array at both ends of the main body (1).

7. The structural concrete reinforcement protective layer thickness detector according to claim 1 is characterized by: The fixing clamps (9) are grouped in pairs. The fixing clamps (9) are arc-shaped, and the surface of the fixing clamps (9) fully fits the surface of the graphite pen core (16). The surface of the fixing clamps (9) is rough.

8. The structural concrete reinforcement protective layer thickness detector according to claim 1 is characterized by: The support block (5) is of T-shaped design, and the surface of the support block (5) fully fits the inner wall of the support groove (4).

9. The structural concrete reinforcement protective layer thickness detector according to claim 2 is characterized by: The slide groove (21) is of curved design, and the surface of the ball (23) is fully fitted with the inner wall of the slide groove (21), and the surface of the ball (23) is of smooth design.

10. The structural concrete reinforcement protective layer thickness detector according to claim 3 is characterized by: The square plate (26) is arranged at the top ends of the threaded block (19) and the hinged rod (25), and a gap is provided between the hinged rod (25) and the square plate (26).

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