A device for detecting the thickness of a high-rise floor reinforcing layer and a detection method thereof

Abstract

The application relates to the technical field of reinforced protective layer measuring equipment, in particular to a high-rise floor reinforced protective layer thickness detection device and a detection method thereof, which comprises a scanner main body; a support frame is installed on the scanner main body, and clamping blocks are arranged on the two sides of the support frame. The device is automatically moved along the wall surface by a traveling mechanism driving a caterpillar belt. The scanner main body detects the reinforced position and the protective layer thickness in real time. A vacuum adsorption system (elastic sleeve, chamber and vacuum pump) is combined to ensure that the device is stably adsorbed on the high-rise floor wall surface, completely replaces manual holding operation, significantly reduces the high-altitude operation risk, improves the detection efficiency and coverage precision, a marking mechanism automatically draws a longitudinal straight line by using the device traveling track, and a vertical straight line is drawn by driving a slider to move transversely through an electromagnet, so that the reinforced position is accurately marked by a cross coordinate, time and space errors of traditional manual marking are eliminated, and accurate positioning of subsequent repair work is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reinforced protective layer measuring equipment, in particular to a detection device for the thickness of the reinforced protective layer of a high-rise floor and a detection method thereof. BACKGROUND

[0002] In the construction of modern reinforced concrete structures such as high-rise buildings and large public facilities, the accurate control of the thickness of the floor reinforced protective layer is one of the key indicators to ensure the durability, safety and use function of the structure. At present, the floor reinforced protective layer thickness detection technology widely used in the industry mainly relies on handheld steel reinforcement scanners. The specific operation mode is usually divided into two types:

[0003] Direct handheld scanning: the detector directly holds the steel reinforcement scanner on the floor surface, and when the instrument detects the steel reinforcement, the protective layer thickness value is displayed on the screen or prompted by sound.

[0004] Long rod assisted scanning: for areas located at high places (such as high-rise floors) or difficult to directly contact, the steel reinforcement scanner is fixed at the top of the long rod, and the ground personnel hold the long rod for scanning detection.

[0005] However, the above existing technology has the following significant defects, which seriously restricts the detection efficiency and accuracy, especially in high-rise floor detection:

[0006] Low degree of automation, relying on high-intensity manual operation: the entire detection process (including instrument movement, positioning, reading, and marking) almost completely depends on manual completion by the detector. The operator needs to maintain a bent-over, arm-raising or head-tilting posture for a long time, which is particularly tiring and inefficient in high-altitude working environments. When detecting a large area of floor, the time-consuming manual movement of the instrument to cover the entire area is very long.

[0007] The steel reinforcement position marking process is complicated and prone to errors: when the position of a specific steel reinforcement (such as a protective layer thickness unqualified point) needs to be recorded, the existing technology usually requires the operator to manually mark on the floor surface after the instrument detects the target steel reinforcement. This marking process itself is very tedious. More importantly:

[0008] Positioning deviation: in the handheld or long rod holding state, there is a time difference and spatial movement between the operator discovering the target steel reinforcement (instrument prompt) and actually marking the position. The slight shaking of the handheld device, the deflection deformation of the long rod, and the error of the human eye in judging the marking point can easily cause significant deviation between the marked position and the actual steel reinforcement position. This deviation makes it difficult to accurately position the subsequent review and repair work, affecting the effectiveness of quality control.

[0009] High-altitude marking difficulty and risk: for the detection of high floor slab bottom surface (ceiling position) steel bars, the marking operation becomes extremely difficult. The operator needs to use a high-altitude operation platform or a hanging basket to mark in a supine position, which is not only inconvenient and inefficient, but also has a high-altitude operation safety risk. The accuracy and clarity of the marking are also difficult to guarantee due to the limitations of the operation posture and environment.

[0010] Detection efficiency and coverage are limited: the moving speed and path planning of manual operation are arbitrary, and it is easy to miss the detection area. Fatigue of manual operation will also lead to a decline in detection quality in the later period.

[0011] In summary, the existing floor steel bar cover thickness detection technology based on a handheld steel bar scanner has the problems of low automation, high labor intensity, complicated and low-precision steel bar position marking (especially prone to position deviation in the marking link), high-altitude marking difficulty and danger, low detection efficiency, and inconvenient data recording and management. With the development of high-rise and super high-rise buildings and the increasing demand for engineering quality fine management, a new detection device and method are needed to overcome the above defects, realize automatic detection, high-precision positioning, mark-free or automatic marking, efficient data acquisition and management, and improve detection efficiency, precision and operation safety. Therefore, we propose a detection device and method for high-rise floor steel bar cover thickness. SUMMARY

[0012] To solve the above technical problems, the present application provides a detection device for high-rise floor steel bar cover thickness, comprising a scanner main body, further comprising:

[0013] A support frame is installed on the scanner main body, and clamping blocks are arranged on both sides of the support frame. A clasp is installed on the support frame, and the clasp and the clamping blocks cooperate to fix the scanner main body on the support frame.

[0014] Two groups of hanging ears are arranged on both sides of the support frame, and a first turnover frame and a second turnover frame are installed on the two groups of hanging ears through first and second rotating shafts, respectively.

[0015] Two groups of travel mechanisms are arranged on both sides of the first and second turnover frames, respectively, and each group has two travel mechanisms. The travel mechanisms drive the scanner main body fixed by the support frame to move, and at the same time, the support frame is adsorbed to the wall through negative pressure when the scanner main body is located on the wall.

[0016] As preferred, the traveling mechanism is composed of a support, a traveling part and a suction accessory, the support is used to connect the whole with the first and second turnover frames respectively, the traveling part is used to drive the whole to move, and the suction accessory generates negative pressure between the traveling part and the wall.

[0017] As preferred, the traveling part includes a transmission wheel sleeved on the support shaft, one of the support shafts is provided with a servo motor, and the transmission wheel is provided with a track on the periphery.

[0018] As preferred, the suction accessory includes an elastic sleeve sleeved on the periphery of the track, the elastic sleeve is evenly divided into a plurality of chambers, the support plate is provided with a vacuum pump, the air suction end of the vacuum pump is sleeved with an air box through a sealing bearing, the air box is provided with an air pipe in communication, the number of the air pipe is equal to that of the chambers in the elastic sleeve, and the end away from the air box is in communication with one of the chambers in the elastic sleeve respectively, a sealing ring is arranged in the air box, the sealing ring is provided with a first electric control valve, the number of the first electric control valve is equal to that of the air pipe, and the first electric control valve and the air pipe are in one-to-one correspondence with the connection position of the air box, a second electric control valve is arranged on the elastic sleeve, the number of the second electric control valve is equal to that of the chambers in the elastic sleeve, and the second electric control valve is arranged on one of the chambers respectively and located on the side away from the track.

[0019] As preferred, the elastic sleeve is made of aviation cloth material and has a thickness of 0.2-0.5mm.

[0020] As preferred, the support plates located on the two sides of the first turnover frame are provided with tripods, the tripods are provided with metal pipes, one end of the metal pipe is in communication with the air exhaust end of the corresponding vacuum pump, and the other end is provided with a high-pressure air nozzle, and the high-pressure air nozzle is in the shape of a Chinese character.

[0021] As preferred, the second turnover frame is provided with a marking mechanism, the marking mechanism is used to mark the position of the steel bars, includes a slide rail arranged on the second turnover frame, a sliding block arranged on the slide rail in sliding mode, an inverted paint bucket arranged on the sliding block in penetrating mode, the paint bucket is provided with a strippable paint mixed with a fluorescent agent, the paint bucket is provided with a spray head at the top end, one side of the slide rail is provided with an electromagnet, one side of the sliding block is fixed with a metal plate, and further includes a pressurizing part arranged on one of the vacuum pumps on the corresponding side.

[0022] As preferred, the pressurizing member comprises a pressurizing pipe, one end of the pressurizing pipe is communicated with the bottom end of the paint bucket, the other end is provided with a transfer box, the transfer box is communicated with the exhaust end of the vacuum pump of one side of the second turnover frame through a pipeline, the transfer box is respectively provided with a third electric control valve and a fourth electric control valve, the opening and closing states of the third electric control valve and the fourth electric control valve are opposite, and the third electric control valve is located at the position where the pressurizing pipe and the transfer box are connected.

[0023] A detection method comprising the detection device for the thickness of the reinforcement protection layer of a high floor, further comprising the following steps:

[0024] S1: the staff fixes the scanner main body on the support frame through the cooperation of the clamping blocks and buckles on both sides of the support frame, unfolds the first turnover frame and the second turnover frame, and rotates the first turnover frame and the second turnover frame to the working position parallel to the wall surface to be detected through the first rotating shaft and the second rotating shaft, and moves the device to the high floor wall surface, the first turnover frame is located in the front position in the direction of travel, and the elastic sleeves of the two groups of travel mechanisms are preliminarily attached to the wall surface;

[0025] S2: the vacuum pump is started, the chambers in the elastic sleeves that are about to contact the wall surface are pumped through the air box and the air pipe, the second electric control valve of the corresponding chamber is opened, the corresponding first electric control valve is opened, and the other first electric control valves and second electric control valves are closed, so that the chamber is negatively pressed and attached to the wall surface, the servo motor is started to drive the transmission wheel to rotate, and the device is driven to move along the wall surface through the caterpillar belt;

[0026] S3: the scanner main body continuously emits a detection signal during the movement process, receives a reflection signal of the steel bars in the concrete, processes the signal data in real time, and determines the position of the steel bars and the thickness of the protection layer;

[0027] S4: the compressed air discharged by the vacuum pump is transported to the high-pressure air nozzle through the metal pipe, and a high-speed air flow is sprayed to remove floating dust on the scanning path;

[0028] S5: when the scanner detects that the position of the steel bars needs to be marked, the marking mechanism is triggered to act, the fourth electric control valve is closed, and the third electric control valve is opened, so that the compressed air discharged by the vacuum pump enters the paint bucket through the transfer box and the pressurizing pipe, the paint bucket is pressurized, the device can draw a vertical straight line, the electromagnet attracts or repels the metal plate, drives the sliding block and the paint bucket to slide along the sliding rail, and can draw a horizontal straight line, and the position to be marked is accurately marked through the two perpendicular straight lines.

[0029] As preferred, the high-speed air flow sprayed by the high-pressure air nozzle in step S4 is in a straight line shape, and the coverage width is greater than the width of the caterpillar belt.

[0030] The present application has at least the following advantages:

[0031] 1. The traveling mechanism drives the track to move autonomously along the wall surface, the scanner body detects the position of the steel bar and the thickness of the protective layer in real time, and the vacuum adsorption system (elastic sleeve, chamber and vacuum pump) ensures that the equipment is stably adsorbed on the high-rise floor wall surface, completely replaces manual holding operation, significantly reduces the risk of high-altitude operation, and improves the detection efficiency and coverage accuracy;

[0032] 2. The marking mechanism automatically draws a longitudinal straight line using the device traveling trajectory, and draws a vertical straight line by driving the slider to move transversely through the electromagnet, so as to accurately mark the position of the steel bar with cross coordinates, eliminate the time and space errors of traditional manual marking, and ensure accurate positioning of subsequent repair work;

[0033] 3. The compressed air discharged by the vacuum pump forms a linear high-speed airflow through the high-pressure air nozzle, which can pre-clean the floating dust on the scanning path, avoid dust interference with signal detection, and improve the service life of the vacuum pump. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0035] Figure 2 It is a schematic diagram of the overall structure of the present application;

[0036] Figure 3 It is a schematic diagram of the overall structure of the present application; Figure 2

[0037] Figure 4 It is a schematic diagram of the overall structure of the present application;

[0038] Figure 5 It is a schematic diagram of the overall structure of the present application; Figure 4

[0039] Figure 6 It is a schematic diagram of the overall structure of the present application; Figure 4

[0040] Figure 7 It is a schematic diagram of the overall structure of the present application;

[0041] Figure 8 It is a schematic diagram of the overall structure of the present application; Figure 7

[0042] ​​​​In the figure: 1, scanner main body; 2, support frame; 21, clamping block; 22, buckle; 23, hanging ear; 24, first rotating shaft; 25, second rotating shaft; 26, first turnover frame; 27, second turnover frame; 3, traveling mechanism; 31, support; 311, support plate; 312, support shaft; 32, traveling piece; 321, transmission wheel; 322, servo motor; 323, track; 33, suction accessory; 331, elastic sleeve; 332, vacuum pump; 333, gas box; 334, air pipe; 335, sealing ring; 336, first electric control valve; 337, second electric control valve; 4, tripod; 41, metal pipe; 42, high-pressure air nozzle; 5, marking mechanism; 51, sliding rail; 52, sliding block; 53, paint bucket; 54, spray head; 55, electromagnet; 56, metal plate; 57, pressurizing piece; 571, pressurizing pipe; 572, transfer box; 573, third electric control valve; 574, fourth electric control valve. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. Embodiment 1

[0044] Please refer to Figures 1-8 The present application provides a technical solution: a device for detecting the thickness of the reinforcement cover layer of a high-rise floor slab, comprising a scanner main body 1, further comprising:

[0045] A support frame 2 is installed on the scanner main body 1, and the support frame 2 is provided with clamping blocks 21 on both sides, and the support frame 2 is provided with buckles 22, which cooperate with the clamping blocks 21 to fix the scanner main body 1 on the support frame 2.

[0046] Hanging ears 23, which are provided on both sides of the support frame 2, are provided with first turnover frames 26 and second turnover frames 27 through first rotating shafts 24 and second rotating shafts 25, respectively.

[0047] A traveling mechanism 3, which has two groups, each group having two, is provided on both sides of the first turnover frame 26 and the second turnover frame 27, respectively. The traveling mechanism 3 drives the scanner main body 1 fixed by the support frame 2 to move, and when the scanner main body 1 is located on a wall, the traveling mechanism 3 causes the support frame 2 to be adsorbed on the wall through negative pressure.

[0048] The traveling mechanism 3 is composed of three parts, a support 31, a traveling part 32 and a suction accessory 33, the support 31 is used to connect the whole with the first and second turnover frames 26 and 27 respectively, the traveling part 32 is used to drive the whole to move, and the suction accessory 33 generates negative pressure between the traveling part 32 and the wall, the support 31 comprises support plates 311 installed on both sides of the first and second turnover frames 26 and 27 respectively, and support shafts 312 are installed through the support plates 311, and each support shaft 312 has a plurality of.

[0049] The traveling part 32 comprises transmission wheels 321 sleeved on the support shafts 312, a servo motor 322 is installed on one of the support shafts 312, and endless tracks 323 are sleeved on the periphery of the transmission wheels 321.

[0050] The suction accessory 33 comprises elastic sleeves 331 sleeved on the periphery of the endless tracks 323, the elastic sleeves 331 are evenly divided into a plurality of chambers, vacuum pumps 332 are installed on the support plates 311, air boxes 333 are sleeved with the air suction ends of the vacuum pumps 332 through sealing bearings, air pipes 334 are arranged in communication with the air boxes 333, the number of the air pipes 334 is equal to that of the chambers in the elastic sleeves 331, one end of each air pipe 334 is in communication with one of the chambers in the elastic sleeves 331, and sealing rings 335 are installed in the air boxes 333, first electric control valves 336 are arranged on the sealing rings 335, the number of the first electric control valves 336 is equal to that of the air pipes 334, the first electric control valves 336 and the air pipes 334 are in one-to-one correspondence with the connecting positions of the air boxes 333, and second electric control valves 337 are installed on the elastic sleeves 331, the number of the second electric control valves 337 is equal to that of the chambers in the elastic sleeves 331, and each second electric control valve 337 is arranged on one of the chambers and located on the side away from the endless tracks 323.

[0051] The elastic sleeves 331 are made of aviation cloth and have a thickness of 0.2-0.5 mm.

[0052] Tripods 4 are installed on the support plates 311 located on both sides of the first turnover frame 26, metal pipes 41 are installed on the tripods 4, one end of each metal pipe 41 is in communication with the air exhaust end of a corresponding vacuum pump 332, and high-pressure air nozzles 42 are installed at the other ends of the metal pipes 41, and the high-pressure air nozzles 42 are in the shape of a Chinese character.

[0053] The second turnover frame 27 is provided with a marking mechanism 5 for marking the position of the reinforcing steel bars, which comprises a sliding rail 51 provided on the second turnover frame 27, a sliding block 52 slidingly arranged on the sliding rail 51, an inverted paint bucket 53 provided through the sliding block 52, a paint in the paint bucket 53 mixed with a fluorescent agent, a spray head 54 provided at the top end of the paint bucket 53, an electromagnet 55 provided on one side of the sliding rail 51, a metal plate 56 fixed on one side of the sliding block 52, and a pressurizing device 57 provided on one of the vacuum pumps 332.

[0054] The pressurizing device 57 comprises a pressurizing pipe 571, one end of which is in communication with the bottom end of the paint bucket 53, and the other end of which is provided with a transfer box 572, the transfer box 572 is in communication with the exhaust end of one of the vacuum pumps 332 of the second turnover frame 27 through a pipeline, the transfer box 572 is respectively provided with a third electric control valve 573 and a fourth electric control valve 574, the opening and closing states of the third electric control valve 573 and the fourth electric control valve 574 are opposite, and the third electric control valve 573 is located at the position where the pressurizing pipe 571 and the transfer box 572 are connected.

[0055] A detection method, comprising the high floor reinforcing steel bar protective layer thickness detection device, further comprising the following steps:

[0056] S1: The staff fixes the scanner main body 1 on the support frame 2 through the cooperation of the clamping block 21 and the buckle 22 on both sides of the support frame 2, unfolds the first turnover frame 26 and the second turnover frame 27, and rotates them to the working position parallel to the wall surface to be detected through the first rotating shaft 24 and the second rotating shaft 25, and moves the device to the high floor wall surface, the first turnover frame 26 is located at the front position in the moving direction, and the elastic sleeves 331 of the two groups of moving mechanisms 3 are preliminarily attached to the wall surface;

[0057] S2: Start the vacuum pump 332, and exhaust the chamber about to contact the wall surface in the elastic sleeve 331 through the air box 333 and the air pipe 334, at the same time, open the second electric control valve 337 of the corresponding chamber, open the corresponding first electric control valve 336, and close the other first electric control valves 336 and second electric control valves 337, so that the chamber is adsorbed to the wall surface by negative pressure, and the servo motor 322 is started to drive the transmission wheel 321 to rotate, and the device is driven to move along the wall surface through the caterpillar track 323;

[0058] S3: The scanner main body 1 continuously emits a detection signal during the moving process, receives the reflected signal of the reinforcing steel bars in the concrete, processes the signal data in real time, and determines the position of the reinforcing steel bars and the protective layer thickness;

[0059] S4: The compressed air discharged by the vacuum pump 332 is delivered to the high-pressure air nozzle 42 through the metal pipe 41, and a high-speed air flow is sprayed to remove floating dust on the scanning path;

[0060] S5: When the scanner detects that the position of the steel bar needs to be marked, the marking mechanism 5 is triggered to act, the fourth electric control valve 574 is closed, the third electric control valve 573 is opened, the compressed air discharged by the vacuum pump 332 enters the paint bucket 53 through the transfer box 572 and the pressurizing pipe 571, the paint bucket 53 is pressurized, the front movement of the equipment can draw a vertical straight line, the electromagnet 55 attracts or repels the metal plate 56, drives the sliding block 52 and the paint bucket 53 to slide along the sliding rail 51, and a horizontal straight line can be drawn, and through the two perpendicular straight lines, the position needing to be marked is accurately marked.

[0061] The high-speed airflow sprayed by the high-pressure air nozzle 42 in step S4 is in a linear shape, and the covered width is greater than the width of the track 323.

[0062] Working principle: After the staff adjusts the detection parameters of the scanner main body 1, the scanner main body 1 is fixed through the cooperation of the clamping blocks 21 and the buckles 22 on both sides of the support frame 2, the first turnover frame 26 and the second turnover frame 27 are unfolded to the working position, the elastic sleeve 331 is preliminarily attached to the wall, then the vacuum pump 332 is started, the second electric control valve 337 in the cavity in contact with the wall and the corresponding first electric control valve 336 in the air box 333 are opened, with the extraction of the gas in the air box 333 by the vacuum pump 332, the air box 333 extracts the gas from the cavity in contact with the wall through the air pipe 334, and the negative pressure adsorption is formed, with the movement of the equipment, the opening and closing states of the first electric control valve 336 and the second electric control valve 337 at different positions are changed accordingly, which can be realized by the sensor and simple programming for the prior art.

[0063] At the same time, the servo motor 322 is started, the transmission wheel 321 drives the track 323 to move, the scanner main body 1 continuously emits a detection signal and receives the steel bar reflection data, the thickness of the protective layer is calculated in real time, the high-pressure air nozzle 42 at the exhaust end of the vacuum pump 332 sprays a linear high-speed airflow, and the dust in front of the track 323 is removed, when the steel bar needing to be marked is detected, the marking mechanism 5 is triggered: the fourth electric control valve 574 is closed, the third electric control valve 573 is opened, the compressed air enters the paint bucket 53 through the transfer box 572 and the pressurizing pipe 571, the paint bucket 53 is pressurized, the nozzle 54 draws a vertical straight line during the movement of the equipment, when the nozzle 54 moves to the position needing to be marked, the electromagnet 55 attracts / repels the metal plate 56 to drive the sliding block 52 to slide horizontally, and a vertical straight line is drawn, and then the sliding block 52 is reset, it should be noted that the reset of the sliding block 52 can be solved by various conventional means in the prior art, such as adding a spring on one side of the sliding rail 51, or increasing the friction force acting on the sliding block 52 in the initial position (increasing the resistance in the middle position of the sliding rail 51 and the corresponding part of the sliding block 52 in the initial position), etc., and finally a cross coordinate is formed, and the marking is completed.

[0064] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0065] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. A device for detecting the thickness of the steel bar protective layer of a high-rise floor slab, comprising a scanner body, characterized in that: Also includes: A support frame, the support frame is mounted on the scanner body, and blocks are provided on both sides of the support frame. A buckle is installed on the support frame, and the buckle and the block cooperate with each other to fix the scanner body on the support frame; There are two sets of hanging ears, which are respectively arranged on both sides of the support frame, and the first turning frame and the second turning frame are respectively installed on the two sets of hanging ears through the first rotating shaft and the second rotating shaft; The traveling mechanism comprises two groups, each group having two members, which are respectively arranged on both sides of the first flip frame and the second flip frame. The traveling mechanism drives the scanner body fixed by the support frame to move. When the scanner body is located on a wall, the supporting frame is adsorbed on the wall by negative pressure while traveling. The travel mechanism is composed of three parts: a support member, a travel member, and an adsorption member. The support member is connected to the first flip frame and the second flip frame. The travel member is used to drive the entire device to move. The adsorption member generates negative pressure between the travel member and the wall. The support member includes support plates respectively installed on both sides of the first flip frame and the second flip frame. A support shaft is installed through the support plate, and there are several support shafts. The adsorption component includes an elastic sleeve sleeved on the periphery of the track, the elastic sleeve is evenly divided into a plurality of chambers, a vacuum pump is installed on the support plate, the suction end of the vacuum pump is connected to the air box through a sealing bearing, the air box is connected with an air pipe, the number of the air pipes is equal to the number of chambers in the elastic sleeve, and the end away from the air box is respectively connected to one of the chambers in the elastic sleeve, a sealing ring is installed in the air box, a first electrically controlled valve is provided on the sealing ring, the number of the first electrically controlled valves is equal to the number of air pipes, and the connection positions of the first electrically controlled valve and the air pipe and the air box correspond one to one, a second electrically controlled valve is installed on the elastic sleeve, the number of the second electrically controlled valves is equal to the number of chambers in the elastic sleeve, and they are respectively provided on one of the chambers, located on the side away from the track; A marking mechanism is installed on the second turning frame, and the marking mechanism is used to mark the position of the steel bar. The marking mechanism includes a slide rail installed on the second turning frame, a slider is slidably provided on the slide rail, an inverted paint bucket is installed through the slider, and the paint bucket contains peelable paint mixed with fluorescent agent. A nozzle is provided on the top of the paint bucket, an electromagnet is installed on one side of the slide rail, a metal plate is fixed on one side of the slider, and also includes a pressure member installed on one of the vacuum pumps on the corresponding side.

2. The device for detecting the thickness of the steel bar protective layer of a high-rise floor slab according to claim 1, characterized in that: The traveling member includes a transmission wheel sleeved on a supporting shaft, wherein a servo motor is installed on one of the supporting shafts, and a crawler belt is sleeved on the periphery of the transmission wheel, and the crawler belt connects all the transmission wheels.

3. The device for detecting the thickness of the steel bar protective layer of a high-rise floor slab according to claim 1, characterized in that: The elastic sleeve is made of aviation cloth and has a thickness of 0.2-0.5 mm.

4. The device for detecting the thickness of the steel bar protective layer of a high-rise floor slab according to claim 3 is characterized in that: A tripod is installed on the support plates on both sides of the first flip frame, and a metal tube is installed on the tripod. One end of the metal tube is connected to the exhaust end of the vacuum pump at the corresponding position, and the other end is installed with a high-pressure gas nozzle, which is in a straight line shape.

5. The device for detecting the thickness of the steel bar protective layer of a high-rise floor slab according to claim 1 is characterized in that: The pressurizing part includes a pressurizing tube, one end of which is connected to the bottom end of the paint bucket, and a transfer box is provided at the other end. The transfer box is connected to the exhaust end of the vacuum pump on one side of the second flip frame through a pipeline. The transfer box is respectively provided with a third electrically controlled valve and a fourth electrically controlled valve. The switching states of the third electrically controlled valve and the fourth electrically controlled valve are opposite, and the third electrically controlled valve is located at the position where the pressurizing tube and the transfer box are connected.

6. A detection method, applicable to the device for detecting the thickness of the steel bar protective layer of a high-rise floor slab according to claim 5, characterized in that: The following steps are also included: S1: The staff fixed the scanner body to the support frame by cooperating with the blocks and buckles on both sides of the support frame. The staff unfolded the first and second flip frames and rotated them through the first and second rotating shafts to a working position parallel to the wall to be measured. The equipment was moved to the wall of a high-rise floor, with the first flip frame located in the front position in the direction of travel. The elastic sleeves of the two sets of travel mechanisms were initially fitted to the wall. S2: Start the vacuum pump to extract air from the chamber in the elastic sleeve that is about to contact the wall through the air box and air pipe. At the same time, open the second electric control valve of the corresponding chamber, open the corresponding first electric control valve, and close the other first and second electric control valves to generate negative pressure in the chamber so that it is adsorbed to the wall. Start the servo motor to drive the transmission wheel to rotate, and drive the equipment to move along the wall via the crawler belt. S3: The scanner body continuously transmits detection signals during movement, receives reflected signals from the steel bars inside the concrete, processes the signal data in real time, and determines the position of the steel bars and the thickness of the protective layer; S4: The compressed air discharged from the vacuum pump is transported to the high-pressure air nozzle through the metal pipe, and a high-speed airflow is ejected to remove the dust on the path to be scanned; S5: When the scanner detects that the position of the steel bar needs to be marked, the marking mechanism is triggered to close the fourth electric control valve and open the third electric control valve, so that the compressed air discharged by the vacuum pump enters the paint bucket through the transfer box and the pressure pipe, pressurizing the paint bucket. The forward movement of the equipment can draw a longitudinal straight line. The electromagnet attracts or repels the metal plate, driving the slider and the paint bucket to slide along the slide rail to draw a transverse straight line. Through two mutually perpendicular straight lines, the position to be marked can be accurately marked.

7. A detection method according to claim 6, characterized in that: In step S4 , the high-speed airflow ejected from the high-pressure air nozzle is in a straight line shape and covers an area with a width greater than the width of the track.

Images