A device and method for detecting the thickness of steel bar protective layer for engineering construction supervision

Abstract

The present invention provides a steel bar protective layer thickness detection device and method for engineering construction supervision, which belongs to the technical field of steel bar protective layer thickness detection equipment, including a detection frame, the detection frame is used to be fixedly installed on the surface of the detected area, a mounting frame is slidably arranged on the detection frame, the mounting frame can slide back and forth along the length direction of the detection frame, a lifting hole is opened on the mounting frame along the direction perpendicular to the surface of the detection frame, a lifting frame is slidably arranged in the lifting hole along the direction perpendicular to the surface of the detection frame, a grinding wheel and a driving motor are rotatably arranged on the lifting frame, the driving motor is connected to the rotating shaft of the grinding wheel, a control rod is rotatably arranged on the mounting frame, a connecting rod is rotatably arranged on the control rod, the first end of the connecting rod is rotatably connected to the control rod, the second end of the connecting rod is rotatably connected to the top surface of the lifting frame, and a scale is arranged on the top of the lifting frame. The present invention can conveniently measure the thickness of the steel bar protective layer in the detection area by partial damage.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bar protective layer thickness detection equipment, and in particular to a steel bar protective layer thickness detection device and method for engineering construction supervision. Background Art

[0002] In concrete structural engineering, the thickness of the steel bar protective layer is a key parameter for evaluating the safety and durability of the structure. At present, non-destructive testing technologies are mostly used in engineering practice, such as electromagnetic induction detectors and ultrasonic testing equipment. These methods are widely used because of their convenient operation and high detection efficiency. However, the test results of such equipment are easily affected by various factors, such as the uniformity of the internal materials of the concrete, the doping of non-magnetic materials, and the strong magnetic field of the surrounding environment. These interferences may lead to inaccurate test results, especially in areas with complex steel bar distribution or thick protective layers.

[0003] Therefore, when non-destructive testing technology cannot provide effective results, the thickness detection after damage becomes a necessary supplementary means. By locally damaging the test area, the thickness of the steel bar cover can be directly measured and the accuracy of the non-destructive testing results can be verified. This method can not only avoid missing key parts, but also provide reference data for the calibration of the testing equipment. Summary of the invention

[0004] The object of the present invention is to provide a device and method for detecting the thickness of a steel bar protective layer for engineering construction supervision, which can conveniently measure the thickness of the steel bar protective layer in a detection area by means of local damage.

[0005] In the first aspect, the embodiments of the present invention are implemented by the following technical solutions: A steel bar protective layer thickness detection device for engineering construction supervision comprises a detection frame, the detection frame is used to be fixedly installed on the surface of the detected area, the detection frame is slidably provided with a mounting frame, the mounting frame can slide back and forth along the length direction of the detection frame, the mounting frame is provided with a lifting hole in a direction perpendicular to the surface of the detection frame, a lifting frame is slidably provided in the lifting hole in a direction perpendicular to the surface of the detection frame, a grinding wheel and a driving motor are rotatably provided on the lifting frame, the driving motor is connected to the rotating shaft of the grinding wheel, a control rod is rotatably provided on the mounting frame, a connecting rod is rotatably provided on the control rod, a first end of the connecting rod is rotatably connected to the control rod, and a second end of the connecting rod is rotatably connected to the top surface of the lifting frame, and a scale is provided on the top of the lifting frame, and the scale is provided perpendicular to the surface of the mounting frame.

[0006] Furthermore, a grinding plane is provided on the peripheral side of the grinding wheel at the maximum diameter, and the grinding plane abuts and rubs against the steel bar protective layer.

[0007] Furthermore, the end face of the grinding wheel is provided with a plurality of stepped annular grinding surfaces, the plurality of stepped annular grinding surfaces are distributed in a stepped manner relative to the rotation axis of the grinding wheel, and the diameters of the plurality of stepped annular grinding surfaces gradually decrease along the direction toward the end of the grinding wheel.

[0008] Furthermore, one end of the control rod is rotatably set on the top surface of the mounting frame, and an arc-shaped tooth plate is provided on the mounting frame. The center of the arc-shaped tooth plate coincides with the rotation axis of the control rod, and a ratchet is provided on the surface of the arc-shaped tooth plate. A limiting tooth is provided on the rod body of the control rod, and the limiting tooth is engaged with the ratchet.

[0009] Furthermore, a limiting rod is provided on the lifting frame, the limiting rod is passed through the lifting hole, a limiting protrusion is provided at one end of the limiting rod away from the lifting frame, an elastic spring is provided on the rod body of the limiting rod passing through the lifting hole, a first end of the elastic spring abuts against the top surface of the mounting frame, and a second end of the elastic spring abuts against the limiting protrusion.

[0010] Furthermore, a marking pen is arranged on the mounting frame, and the tip of the marking pen abuts against the surface of the scale.

[0011] Furthermore, an elastic rubber sheet is provided on the mounting frame, a mounting hole is opened in the middle of the elastic rubber sheet, and the engraving pen is arranged in the mounting hole.

[0012] Furthermore, a suction cup is provided at the bottom of the detection frame, and the suction cup is used to be adsorbed on the surface of the detected area.

[0013] Furthermore, a protective cover is provided on the lifting frame, and the protective cover is arranged on the peripheral side of the grinding wheel. A plurality of atomizing nozzles are fixedly mounted on the protective cover, and the atomizing nozzles are arranged directly facing the grinding wheel.

[0014] In a second aspect, the present invention discloses a method for detecting the thickness of a steel bar protective layer for engineering construction supervision, comprising the following steps: S1. Place the test frame on the surface of the test area, adjust the height of the lifting frame so that the grinding wheel contacts the steel bar protective layer, and use a marking pen to record the initial position on the surface of the scale; S2, start the drive motor, control the friction between the grinding wheel and the steel bar protective layer surface, adjust the rotation angle of the control rod, the control rod changes the height of the lifting frame through the connecting rod until the grinding wheel abuts against the surface of the steel bar, and use a marking pen to record the descending position on the surface of the scale; S3. Calculate the distance between the initial position and the descending position in the scale to obtain the thickness of the steel bar protective layer.

[0015] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: 1. The present invention places the detection frame on the surface of the detection area and adjusts the height of the lifting frame so that the grinding wheel can accurately contact the surface of the steel bar protective layer. First, use a stylus to record the initial position on the surface of the scale, start the drive motor and control the surface friction between the grinding wheel and the steel bar protective layer, so as to grind gradually. Then, by adjusting the rotation angle of the control rod, the control rod changes the height of the lifting frame through the connecting rod until the grinding wheel accurately contacts the steel bar surface, and the stylus is used again to record the descending position. By calculating the distance between the initial position and the descending position on the scale, the thickness of the steel bar protective layer can be accurately obtained.

[0016] This process forms long grinding cracks on the surface of the steel bar protective layer by partial damage, which can visually observe the position of the steel bar, thereby conveniently measuring the thickness of the steel bar protective layer in the detection area. The advantage of this method is that it not only achieves high-precision detection of the thickness of the steel bar protective layer, but also avoids the complex operations in traditional methods, improving measurement efficiency and accuracy. In addition, the partial damage method makes the detection process more intuitive, and can easily confirm the position of the steel bar, ensuring the reliability of the detection results.

[0017] 2. The present invention designs the end face of the grinding wheel to be a plurality of stepped annular grinding surfaces, and these stepped annular grinding surfaces are distributed in a stepped manner relative to the rotating axis of the grinding wheel, and the diameter gradually decreases toward the end of the grinding wheel. This design can provide a more effective grinding effect when grinding the detection area, while avoiding excessive cutting area of ​​the grinding seam, thereby preventing adverse effects on the strength of the steel bars and concrete. The stepped grinding seam design not only ensures accurate grinding of the detection area, but also helps to coat high-strength cement in later construction, further enhancing connectivity with the grinding seam. This structural optimization increases the overall strength, improves the project quality and long-term stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the overall structure of a steel bar protective layer thickness detection device for engineering construction supervision provided by the present invention; Figure 2 It is a schematic diagram of the structure of the mounting frame of the present invention; Figure 3 for Figure 2A magnified schematic diagram of part A; Figure 4 for Figure 2 A magnified schematic diagram of part B; Figure 5 It is a schematic diagram of the lifting frame structure of the present invention; Figure 6 is a schematic diagram of the grinding wheel structure of the present invention; Figure 7 It is a schematic diagram used to show the connection relationship between the control rod, the connecting rod and the lifting seat in the present invention; Icons: 1-detection frame, 11-suction cup, 12-guide rail, 2-mounting frame, 20-swing hole, 21-slider, 22-lifting hole, 23-control rod, 231-limiting tooth, 24-connecting rod, 25-arc tooth plate, 251-ratchet, 26-engraving pen, 27-elastic rubber sheet, 271-mounting hole, 28-adjustment hole, 3-lifting frame, 31-grinding wheel, 311-grinding plane, 312-step ring grinding surface, 32-drive motor, 33-scale, 34-limiting rod, 341-limiting bump, 342-elastic spring, 35-protective cover, 4-atomizing nozzle, 5-handle. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0022] Embodiment: The following is further described in conjunction with specific embodiments. Figure 1-Figure 7 As shown, the present invention is a steel bar protective layer thickness detection device for engineering construction supervision, including a detection frame 1, which is used to be fixedly installed on the surface of the detected area to ensure the stability of the entire device during operation. In order to facilitate the adjustment and sliding of the mounting frame 2, the detection frame 1 is fixedly installed with a pair of guide rails 12 along its length direction, and these guide rails 12 provide a path for the mounting frame 2 to slide back and forth, so that the mounting frame 2 can be flexibly moved within the detection area, thereby realizing detection of different areas.

[0023] Specifically, the mounting frame 2 is provided with a slider 21 through the bottom wall, and the slider 21 corresponds to the guide rail 12 and is slidably engaged with the guide rail 12. The design of the slider 21 ensures that the mounting frame 2 can slide along the guide rail 12 smoothly and without jamming, meeting the position accuracy requirements during operation. In order to facilitate the operation of the staff, the mounting frame 2 is equipped with a handle 5, and the operator can easily pull the mounting frame 2, so as to quickly and accurately adjust the position during the detection process.

[0024] The design of the mounting frame 2 also takes into account convenience and flexibility of adjustment. A lifting hole 22 is provided on the mounting frame 2 in a direction perpendicular to the surface of the detection frame 1. A lifting frame 3 is provided in the lifting hole 22. The lifting frame 3 can slide freely in the vertical direction to facilitate adjustment of the height of the detection tool. A grinding wheel 31 and a driving motor 32 are rotatably provided on the lifting frame 3. The driving motor 32 is connected to the grinding wheel 31 through a rotating shaft. The driving motor 32 is fixed on the lifting frame 3, and plays the role of driving the grinding wheel 31 to rotate, thereby driving the grinding wheel 31 to perform grinding work on the steel bar protective layer.

[0025] In addition, in order to accurately control the position of the lifting frame 3, a control rod 23 is rotatably provided on the mounting frame 2, and a connecting rod 24 is also hingedly provided on the control rod 23, one end of the connecting rod 24 is rotatably connected to the control rod 23, and the other end is rotatably connected to the top surface of the lifting frame 3. Through the swing of the control rod 23, the connecting rod 24 can drive the lifting frame 3 to move up and down, and adjust the contact height between the grinding wheel 31 and the steel bar protective layer. The joint action of the control rod 23 and the connecting rod 24 can play a labor-saving role.

[0026] The mounting frame 2 is also provided with an adjustment hole 28, through which a scale 33 is inserted, and the scale 33 is arranged perpendicular to the surface of the mounting frame 2, so as to facilitate accurate reading of measurement data during operation and ensure the accuracy of thickness measurement. The setting of the scale 33 enables each adjustment of the lifting frame 3 to intuitively reflect its height change, thereby providing a convenient and accurate height adjustment basis for the staff.

[0027] Reference Figure 1 and Figure 6 As shown, the design of the grinding wheel 31 has significant innovation and practicality, especially in the optimization of its grinding surface and structural form. A grinding plane 311 is provided on the circumference of the maximum diameter of the grinding wheel 31, which is in close contact and friction with the steel bar protective layer, playing an effective grinding role. In order to improve the grinding effect, the surface of the grinding plane 311 is covered with a frosted layer. The setting of the frosted layer can increase the friction with the steel bar protective layer, thereby improving the grinding efficiency, and help to ensure uniform grinding of the steel bar protective layer and reduce the possibility of uneven wear.

[0028] Reference Figure 5 and Figure 6As shown, the end face of the grinding wheel 31 is designed as a plurality of stepped annular grinding surfaces 312, which also have a frosted layer, which can further enhance the stability of grinding. The stepped annular grinding surfaces 312 are distributed in a stepped manner relative to the rotating axis of the grinding wheel 31. The gradually reduced diameter in the design effectively distributes the grinding force and reduces the risk of uneven wear or excessive wear during operation. Specifically, the design of the stepped annular grinding surface 312 gradually reduces the cutting area of ​​each annular grinding surface, avoiding an excessively large cutting area of ​​the entire grinding seam, preventing adverse effects on the strength of the steel bars and concrete, and facilitating the coating of high-strength cement in the later construction, further enhancing the connectivity with the grinding seam.

[0029] This stepped distribution design is an important innovation of the present invention, which not only ensures the accuracy of grinding, but also optimizes the force distribution during grinding, avoiding over-cutting and overheating. As the diameter gradually decreases, the grinding surface is easier to maintain stability during fine adjustment, effectively improving the overall thickness measurement accuracy of the steel bar cover, while avoiding excessive damage to the steel bar or concrete surface, thereby protecting the construction quality and long-term stability of the structure.

[0030] Reference Figure 1 and Figure 7 As shown, in order to ensure that the grinding depth of the grinding wheel 31 can be accurately controlled, the structural design of the control rod 23 adopts a more sophisticated control mechanism. Specifically, one end of the control rod 23 is rotatably set on the top surface of the mounting frame 2, and an arc-shaped tooth plate 25 is provided on the mounting frame 2. The center of the arc-shaped tooth plate 25 coincides with the rotation axis of the control rod 23, thereby ensuring that the control rod 23 can swing along a predetermined path. The surface of the arc-shaped tooth plate 25 is designed with a plurality of ratchet teeth 251, which can be engaged with the limiting teeth 231 on the control rod 23 to form a limiting structure.

[0031] The engagement between the ratchet teeth 251 and the limiting teeth 231 can effectively limit the swing range of the control rod 23, ensuring that the swing of the control rod 23 does not exceed the preset range during the grinding process, thereby limiting the pressing depth of the grinding wheel 31. Specifically, when the control rod 23 is in operation, the engagement between the ratchet teeth 251 and the limiting teeth 231 will automatically lock the position of the control rod 23 in each operation step, avoiding the depth change of the grinding wheel 31 due to improper operation, and ensuring that the grinding depth is always kept within the required range.

[0032] In addition, the design of the limit teeth 231 and the ratchet teeth 251 makes adjustment more convenient, and the staff can manually adjust the position of the control rod 23 at any time as needed to ensure that the depth adjustment during the grinding process is more accurate. Due to the clamping fit between the limit teeth 231 and the ratchet teeth 251, it can also effectively reduce misoperation during the grinding process, avoid over-grinding or insufficient depth, and improve the accuracy of the steel bar protective layer thickness detection.

[0033] Reference Figure 1 and Figure 5 As shown, a pair of limiting rods 34 are provided on the lifting frame 3, the limiting rods 34 are inserted into the lifting holes 22, and a limiting protrusion 341 is provided at one end of the limiting rods 34 away from the lifting frame 3. The design of the limiting rods 34 can not only ensure the precise guidance of the lifting frame 3 when it moves up and down, but also the limiting protrusion 341 can effectively prevent the lifting frame 3 from lateral deviation or irregular movement, thereby improving the stability and accuracy of the lifting frame 3.

[0034] An elastic spring 342 is installed on the rod body of the limiting rod 34 passing through the lifting hole 22. The first end of the elastic spring 342 abuts against the top surface of the mounting frame 2, and the second end of the elastic spring 342 abuts against the limiting protrusion 341. The limiting rod 34 can guide the lifting frame 3, and the elastic spring 342 can reset the lifting frame 3.

[0035] Reference Figure 2 and Figure 3 As shown, in addition, a stylus 26 is provided on the mounting frame 2, and the tip of the stylus 26 abuts against the surface of the scale 33. The stylus 26 is used to accurately mark the initial position of the steel bar protective layer and the lowered position after grinding during the measurement process, ensuring that the thickness measurement of the steel bar protective layer is more accurate and reliable.

[0036] Reference Figure 3 As shown, in order to further improve the use experience and stability of the engraving pen 26, an elastic rubber sheet 27 is provided on the mounting frame 2. A mounting hole 271 is provided in the middle of the elastic rubber sheet 27, and the engraving pen 26 is arranged in the mounting hole 271. Since the elastic rubber sheet 27 has a certain deformation ability, the engraving pen 26 can swing left and right during use, which not only facilitates the engraving pen 26 to make accurate markings, but also prevents the engraving pen 26 from falling during operation. The design of the elastic rubber sheet 27 improves the fixation of the engraving pen 26, making it easier for the staff to use it, reducing unnecessary misoperation, and also extending the service life of the engraving pen 26.

[0037] Reference Figure 1As shown, the detection frame 1 of the present invention is provided with a suction cup 11 at the bottom for adsorbing on the surface of the detected area. Specifically, the four corners of the detection frame 1 are fixedly mounted with suction cups 11, and these suction cups 11 can be designed as manual suction cups 11, so that the operator can conveniently position the detection frame 1 in the designated area as needed, ensuring the stability and accuracy of the detection process. The use of the suction cup 11 can firmly fix the detection frame 1 on the surface of the detection area, avoid displacement during operation, and improve the accuracy and reliability of the detection.

[0038] At the same time, refer to Figure 1 and Figure 5 As shown, a protective cover 35 is installed on the lifting frame 3, and the protective cover 35 surrounds the circumference of the grinding wheel 31 to play a protective and dustproof role. A notch is provided on the surface side of the protective cover 35 close to the inspection area, and the design of the notch enables the grinding wheel 31 to effectively contact the surface of the steel bar protective layer, while ensuring the safety of the operator and avoiding the generation of splashes or dust that affect the operating environment.

[0039] In order to further reduce the dust and fine particles generated during the grinding process, a plurality of atomizing nozzles 4 are fixedly installed on the protective cover 35. The atomizing nozzle 4 is arranged directly opposite to the grinding wheel 31, and the nozzle is connected to the water source through a hose, so that water mist can be evenly sprayed during the grinding process, and the dust layer generated during the grinding process can be washed away in time, thereby reducing the dust concentration in the air and effectively improving the cleanliness of the operating environment. The spraying of water mist can not only reduce the health risks of the operator, but also reduce the detection error caused by the dust affecting the accuracy.

[0040] In a second aspect, the present disclosure provides a method for detecting the thickness of a steel bar protective layer for engineering construction supervision, comprising the following steps: S1, place the detection frame 1 on the surface of the detection area, adjust the height of the lifting frame 3, make the grinding wheel 31 abut against the steel bar protective layer, and use the marking pen 26 to record the initial position on the surface of the scale 33; S2, start the driving motor 32, control the grinding wheel 31 to rub against the steel bar protective layer surface, adjust the rotation angle of the control rod 23, the control rod 23 changes the height of the lifting frame 3 through the connecting rod 24, until the grinding wheel 31 abuts against the steel bar surface, and use the marking pen 26 to record the descending position on the surface of the scale 33; S3, calculating the distance between the initial position and the descending position in the scale 33, and obtaining the thickness of the steel bar protective layer.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steel bar protective layer thickness detection device for engineering construction supervision, characterized in that: The invention comprises a detection frame (1), wherein the detection frame (1) is used for being fixedly mounted on the surface of the detection area, a mounting frame (2) is slidably arranged on the detection frame (1), and the mounting frame (2) can slide back and forth along the length direction of the detection frame (1), a lifting hole (22) is opened on the mounting frame (2) in a direction perpendicular to the surface of the detection frame (1), a lifting frame (3) is slidably arranged in the lifting hole (22) in a direction perpendicular to the surface of the detection frame (1), and a grinding wheel (31) and a driving motor are rotatably arranged on the lifting frame (3). The invention relates to a grinding wheel (31) comprising a lifting frame (32), wherein the driving motor (32) is connected to the rotating shaft of the grinding wheel (31), a control rod (23) is rotatably arranged on the mounting frame (2), a connecting rod (24) is rotatably arranged on the control rod (23), a first end of the connecting rod (24) is rotatably connected to the control rod (23), a second end of the connecting rod (24) is rotatably connected to the top surface of the lifting frame (3), a scale (33) is arranged at the top end of the lifting frame (3), and the scale (33) is arranged perpendicular to the surface of the mounting frame (2).

2. The device for detecting the thickness of the steel bar protective layer for engineering construction supervision according to claim 1 is characterized in that: A grinding plane (311) is provided on the peripheral side of the grinding wheel (31) at the maximum diameter, and the grinding plane (311) is in contact and friction with the steel bar protective layer.

3. The device for detecting the thickness of the steel bar protective layer for engineering construction supervision according to claim 2 is characterized in that: The end surface of the grinding wheel (31) is provided with a plurality of stepped annular grinding surfaces (312), the plurality of stepped annular grinding surfaces (312) are distributed in a stepped manner relative to the rotation axis of the grinding wheel (31), and the diameters of the plurality of stepped annular grinding surfaces (312) gradually decrease along the direction toward the end of the grinding wheel (31).

4. The steel bar protective layer thickness detection device for engineering construction supervision according to claim 1 is characterized in that: One end of the control rod (23) is rotatably arranged on the top surface of the mounting frame (2); an arc-shaped tooth plate (25) is arranged on the mounting frame (2); the center of the arc-shaped tooth plate (25) coincides with the rotation axis of the control rod (23); ratchet teeth (251) are arranged on the surface of the arc-shaped tooth plate (25); and a limiting tooth (231) is arranged on the rod body of the control rod (23); the limiting tooth (231) is engaged with the ratchet tooth (251).

5. The device for detecting the thickness of the steel bar protective layer for engineering construction supervision according to claim 1 is characterized in that: A limiting rod (34) is provided on the lifting frame (3), the limiting rod (34) is inserted into the lifting hole (22), a limiting protrusion (341) is provided at one end of the limiting rod (34) away from the lifting frame (3), an elastic spring (342) is provided on the rod body of the limiting rod (34) passing through the lifting hole (22), a first end of the elastic spring (342) abuts against the top surface of the mounting frame (2), and a second end of the elastic spring (342) abuts against the limiting protrusion (341).

6. The device for detecting the thickness of the steel bar protective layer for engineering construction supervision according to claim 1 is characterized in that: The mounting frame (2) is provided with a marking pen (26), and the tip of the marking pen (26) abuts against the surface of the scale (33).

7. The device for detecting the thickness of the steel bar protective layer for engineering construction supervision according to claim 6 is characterized in that: An elastic rubber sheet (27) is arranged on the mounting frame (2), a mounting hole (271) is opened in the middle of the elastic rubber sheet (27), and the engraving pen (26) is arranged in the mounting hole (271).

8. The device for detecting the thickness of steel bar protective layer for engineering construction supervision according to claim 1 is characterized in that: A suction cup (11) is provided at the bottom of the detection frame (1), and the suction cup (11) is used to be adsorbed on the surface of the detected area.

9. The device for detecting the thickness of the steel bar protective layer for engineering construction supervision according to claim 1, characterized in that: The lifting frame (3) is provided with a protective cover (35), the protective cover (35) is arranged on the peripheral side of the grinding wheel (31), and a plurality of atomizing nozzles (4) are fixedly mounted on the protective cover (35), and the atomizing nozzles (4) are arranged directly facing the grinding wheel (31).

10. A detection method for the steel bar protective layer thickness detection device for engineering construction supervision according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, placing the detection frame (1) on the surface of the detection area, adjusting the height of the lifting frame (3) so that the grinding wheel (31) abuts against the steel bar protective layer, and using a marking pen (26) to record the initial position on the surface of the scale (33); S2, starting the driving motor (32), controlling the friction between the grinding wheel (31) and the surface of the steel bar protective layer, adjusting the rotation angle of the control rod (23), and the control rod (23) changing the height of the lifting frame (3) through the connecting rod (24) until the grinding wheel (31) abuts against the surface of the steel bar, and using the marking pen (26) to record the descending position on the surface of the scale (33); S3, calculating the distance between the initial position and the descending position in the scale (33), and obtaining the thickness of the steel bar protective layer.

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