Device and method for detecting thickness of constructional engineering material
Through the detection of the distance sensor on the inner and outer walls of the pipe by the electromagnet and cylindrical magnets, the problems of pipe thickness detection operation and material waste in the prior art are solved, and fast and accurate thickness measurement and cost savings are achieved.
Patent Information
- Application Number
- CN202411416072.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-01-03
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing construction engineering pipe thickness detection methods rely on manual measurement, which is troublesome to operate and requires cutting off the material, resulting in waste and high costs.
A detection device including an electromagnet, a cylindrical magnet, a distance sensor and a driving mechanism is designed. The distance sensor is driven to detect the inner and outer walls of the pipe by the electromagnet and a cylindrical magnet, so as to achieve thickness measurement without cutoff, and is equipped with vacuuming and Clean the mechanism to remove impurities.
It realizes rapid and accurate detection of pipe thickness, reduces material waste and inspection costs, and at the same time, the cleaning mechanism ensures inspection accuracy.
Smart Images
Figure CN119245581A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of thickness detection, and relates to a detection device and a detection method for the thickness of construction engineering materials. Background Art
[0002] With the rapid development of modern construction industry, the quality and performance testing of construction materials are becoming more and more important. Especially for pipes commonly used in construction projects, there are some pipes with different thicknesses and cutting corners on the market. However, as one of the key indicators for evaluating material quality and performance, accurate and rapid testing of material thickness is of great significance for ensuring project quality and improving construction efficiency.
[0003] At present, the thickness detection method of pipe materials in construction projects mainly relies on manual measurement using a vernier caliper. During measurement, only the thickness of the outer part of the tubular material can be detected. If the middle section or the innermost part of the tubular material needs to be detected, the tubular material needs to be cut off for detection. The overall operation is more troublesome, and the cut-off tubular material is difficult to continue to be put into use, which easily causes material waste and increases detection costs. Summary of the invention
[0004] In view of this, the present invention provides a device and a method for detecting the thickness of construction materials.
[0005] The technical solution is as follows: A device for detecting the thickness of construction materials, comprising a connecting sleeve, a connecting bracket, a rotating bracket, a control panel, an electromagnet, a cylindrical magnet, an elastic member 1, a driving mechanism and an auxiliary moving mechanism, wherein the connecting sleeve is slidingly connected to a connecting bracket at uniform intervals along the circumferential direction, the connecting bracket is rotatably connected to the rotating bracket, an electromagnet is installed on the rotating bracket, the cylindrical magnet and the electromagnet can adsorb each other, an elastic member 1 is connected between the connecting bracket and the connecting sleeve, a distance sensor 1 is installed on the cylindrical magnet, a distance sensor 2 is installed on the electromagnet, a control panel is installed on the connecting sleeve, both the distance sensor 1 and the distance sensor 2 are electrically connected to the control panel, the connecting bracket is provided with a driving mechanism for driving the rotating bracket to rotate, and the cylindrical magnet is provided with an auxiliary moving mechanism.
[0006] Preferably, an electric wheel is also included, and the electric wheel for facilitating the movement of the device for detecting the thickness of construction materials is installed on the side of the multiple rotating brackets that are away from each other.
[0007] Preferably, the driving mechanism includes a motor and a transmission gear, the motor is mounted on the connecting bracket, the output shaft of the motor and the rotating bracket are both connected to the transmission gear, and the two transmission gears are meshed with each other.
[0008] Preferably, the auxiliary moving mechanism includes a sliding sleeve, a ball and an elastic member 2, a plurality of sliding sleeves are evenly spaced along the circumferential direction on the cylindrical magnet, a ball is rotatably connected to the bottom of the sliding sleeve, and an elastic member 2 is connected between the sliding sleeve and the cylindrical magnet.
[0009] Preferably, a dust suction mechanism is also included, which includes a dust hood, a dust cleaner, a mounting hood, a blocking net, a connecting pipe and a collecting frame. The connecting sleeve is connected to the dust hood, and a detachable mounting hood is threadedly connected to the dust hood. The mounting hood is connected to the blocking net, and a dust cleaner is installed on the mounting hood. The suction end of the vacuum cleaner extends into the interior of the mounting hood. A dust collecting chamber is formed between the mounting hood, the interior of the dust hood and the connecting sleeve. Four connecting pipes are evenly spaced along the circumferential direction on the dust hood, and collecting frames are installed on four rotating brackets. The connecting pipes are connected to the collecting frames.
[0010] Preferably, a cleaning mechanism is also included, which includes a brush, a drive motor, a cam and a guide rail. A brush is slidably connected in the collection frame, a drive motor is installed at the bottom of the collection frame, a cam is connected to the output shaft of the drive motor, and the bottom of the sliding frame is connected to the guide rail. A cam is provided on the cam, and the cam is located in the guide rail and can slide in the guide rail.
[0011] Preferably, a synchronous moving mechanism is also included, which includes a rotating shaft, a winding drum and a connecting rope. The middle part of the connecting sleeve is rotatably connected to the rotating shaft, and the winding drum is connected to the rotating shaft. Four connecting ropes are evenly spaced along the circumferential direction and connected to the winding drum. The ends of the four connecting ropes are respectively connected to four connecting brackets.
[0012] The present invention also provides a method for detecting thickness of construction materials, which is characterized by comprising the following specific steps: S1: Place a cylindrical magnet on the edge of the tubular material with detection, so that the rear side of the cylindrical magnet is located at the tubular material, and the distance sensor is located at the front side of the tubular material. S2: Put the connecting sleeve into the tubular material, and control the position of the distance sensor 2 at the front side of the tubular material so that the distance sensor 2 is aligned with the distance sensor 1; S3: Start the distance sensor 1 and the distance sensor 2 to detect the distance between the distance sensor 1 and the distance sensor 2, obtain the distance A, and transmit the distance A to the control panel; S4: Control the operation of the electric wheel to drive the connecting sleeve, the connecting bracket and the rotating bracket to move into the tubular material. During the movement, the electromagnet can drive the cylindrical magnet to move together. The cylindrical magnet and the electromagnet respectively drive the distance sensor 1 and the distance sensor 2 to move to align with the inner wall and outer wall of the tubular material. The distance sensor 1 detects the distance between it and the outer wall of the tubular material to obtain the distance B and transmits it to the control panel. The distance sensor 2 detects the distance between it and the inner wall of the tubular material to obtain the distance C and transmits it to the control panel. Then the control panel subtracts the distances B and C from the distance A to obtain D, and D is the wall thickness of the tubular material, so as to achieve the effect of detecting the wall thickness.
[0013] The beneficial effects of the present invention are as follows: 1. During operation, the present invention can drive distance sensor 1 and distance sensor 2 to extend into the tubular material through the electromagnet and the cylindrical magnet to detect the thickness of the tubular material. There is no need to cut the tubular material during detection, which makes detection more convenient. There is no need to cut the tubular material during detection, which saves detection costs.
[0014] 2. During the detection process, the present invention can use a brush to brush off impurities attached to the inner wall of the tubular material, and at the same time, a vacuum cleaner can be used to generate suction in the collection frame to remove the brushed impurities, thereby preventing the impurities from adhering to the inner wall of the tubular material and hindering the thickness detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention and the tubular material.
[0016] Figure 2 It is a structural schematic diagram of the present invention.
[0017] Figure 3 It is a cross-sectional view of the present invention.
[0018] Figure 4 It is a structural schematic diagram of the driving mechanism of the present invention.
[0019] Figure 5 It is a schematic diagram of the structure of the rotating bracket after rotation of the present invention.
[0020] Figure 6 It is a structural schematic diagram of the auxiliary movement mechanism of the present invention.
[0021] Figure 7 It is a cross-sectional view of the cylindrical magnet of the present invention.
[0022] Figure 8 It is a structural schematic diagram of the dust collection mechanism of the present invention.
[0023] Fig. 9 It is a cross-sectional view of the dust collection mechanism of the present invention.
[0024] Fig.10 It is a schematic diagram of the structure of the cleaning mechanism and the dust collection mechanism of the present invention.
[0025] Fig.11 It is a schematic diagram of the structure of the cleaning mechanism and the collecting frame of the present invention.
[0026] Fig.12 It is a schematic diagram of the structure of the cleaning mechanism after the collection frame of the present invention is cut open.
[0027] Fig.13 It is a schematic structural diagram of the cleaning mechanism of the present invention.
[0028] Fig.14 It is a structural schematic diagram of the synchronous moving mechanism of the present invention.
[0029] Fig.15 It is a cross-sectional view of the synchronous movement mechanism of the present invention.
[0030] Explanation of the reference numerals: 1_connecting sleeve, 2_connecting bracket, 21_rotating bracket, 22_control panel, 3_electromagnet, 4_cylindrical magnet, 5_electric wheel, 6_elastic part 1, 71_distance sensor 1, 72_distance sensor 2, 81_motor, 82_transmission gear, 91_sliding sleeve, 92_ball, 93_elastic part 2, 101_dust collecting hood, 102_vacuum cleaner, 1021_installing hood, 1022_blocking net, 103_connecting pipe, 104_collecting frame, 111_brush, 112_convex shaft, 113_driving motor, 114_cam, 115_guide rail, 121_rotating shaft, 122_winding reel, 123_connecting rope, 100_tubular material. DETAILED DESCRIPTION
[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0032] A device for detecting the thickness of construction materials, such as Figure 1-Figure 7As shown, it includes a connecting sleeve 1, a connecting bracket 2, a rotating bracket 21, a control panel 22, an electromagnet 3, a cylindrical magnet 4, an electric wheel 5, an elastic member 6, a driving mechanism and an auxiliary moving mechanism. The connecting sleeve 1 is evenly and slidably connected to the connecting bracket 2 at intervals along the circumferential direction. The connecting bracket 2 is rotatably connected to the rotating bracket 21. The electromagnet 3 is installed on the rotating bracket 21. The cylindrical magnet 4 and the electromagnet 3 can be attracted to each other. An elastic member 6 is connected between the connecting bracket 2 and the connecting sleeve 1. The elastic member 6 is a connecting Spring, an electric wheel 5 is installed on the side away from each other of the multiple rotating brackets 21, and the electric wheel 5 is composed of a hub motor and an external tire structure. A distance sensor 1 71 is installed on the front side of the cylindrical magnet 4, and a distance sensor 2 72 is installed on the front side of the electromagnet 3. A control panel 22 is installed on the connecting sleeve 1, and the distance sensor 1 71 and the distance sensor 2 72 are electrically connected to the control panel 22. A driving mechanism for driving the rotating bracket 21 to rotate is provided on the connecting bracket 2, and an auxiliary moving mechanism is provided on the cylindrical magnet 4.
[0033] like Figure 4 As shown, the driving mechanism includes a motor 81 and a transmission gear 82. The motor 81 is installed on the connecting bracket 2, and the output shaft of the motor 81 and the rotating bracket 21 are both connected with the transmission gear 82. The two transmission gears 82 are meshed with each other so that the operation of the motor 81 can drive the rotating bracket 21 to rotate through the transmission gear 82.
[0034] like Figure 6 and Figure 7 As shown, the auxiliary moving mechanism includes a sliding sleeve 91, a ball 92 and an elastic member 93. A plurality of sliding sleeves 91 are evenly spaced along the circumferential direction on the cylindrical magnet 4. The bottom of the sliding sleeve 91 is rotatably connected to the ball 92. An elastic member 93 is connected between the sliding sleeve 91 and the cylindrical magnet 4. The elastic member 93 is a pressure spring.
[0035] When it is necessary to detect the thickness of the tubular material 100 in the construction project, the detection device can be used. When in use, first place the cylindrical magnet 4 on the edge of the tubular material 100 with detection, so that the rear side of the cylindrical magnet 4 is located at the tubular material 100, and the distance sensor 1 71 is located at the front side of the tubular material 100, and then the connecting sleeve 1 can be placed inside the tubular material 100. When placing it, first control the four connecting brackets 2 to shrink inward, and the elastic member 1 6 is compressed, and then the connecting sleeve 1 is placed. After placing it, loosen the connecting bracket 2. Under the action of the elastic member 1 6, the connecting bracket 2 is reset, driving the rotating bracket 21 and the electric wheel 5 to reset. After the electric wheel 5 is reset, it presses against the inner wall of the tubular material 100, and when placing it, the distance sensor 2 72 needs to be controlled in position. At the front side of the tubular material 100, the distance sensor 2 72 is aligned with the distance sensor 1 71. At this time, the electromagnet 3 is energized so that the electromagnet 3 generates suction force on the cylindrical magnet 4, so that the electromagnet 3 adsorbs the cylindrical magnet 4 on the outer wall of the tubular material 100. Then, the distance sensor 1 71 and the distance sensor 2 72 are started to detect the distance between the distance sensor 1 71 and the distance sensor 2 72 to obtain the distance A, and the distance A is transmitted to the control panel 22. Then, the electric wheel 5 is controlled to operate. During operation, the internal hub motor of the electric wheel 5 is driven to drive the external tire structure to rotate, thereby driving the connecting sleeve 1, the connecting bracket 2 and the rotating bracket 21 to move into the tubular material 100. During the movement, the electromagnet 3 can drive the cylindrical magnet 4 to rotate. The cylindrical magnet 4 and the electromagnet 3 respectively drive the distance sensor 1 71 and the distance sensor 2 72 to move toward the inner wall and the outer wall of the tubular material 100, and the distance sensor 1 71 detects the distance between the distance sensor 1 and the outer wall of the tubular material 100 to obtain the distance B and transmits it to the control panel 22, and the distance sensor 2 72 detects the distance between the distance sensor 1 and the inner wall of the tubular material 100 to obtain the distance C and transmits it to the control panel 22, and then the control panel 22 subtracts the distance B and C from the distance A to obtain D, and D is the wall thickness of the tubular material 100, and as the device continues to move toward the inner wall of the tubular material 100, if the wall thickness changes, the distance sensor 1 71 will be moved to the inner wall of the tubular material 100. 1 and the distance C detected by the distance sensor 2 72 change, and the calculated D also changes at this time, which means that the thickness of the pipe wall changes. Then the staff will judge whether the thickness is qualified. After the thickness of the pipe wall changes, the motor 81 can be controlled to drive the rotating bracket 21 to rotate ninety degrees through the transmission gear 82, so that the electric wheel 5 adjusts the angle. At this time, the operation of the electric wheel 5 can drive the connecting sleeve 1 to rotate in the tubular material 100, so as to drive the distance sensor 1 71 and the distance sensor 2 72 to detect the wall thickness of the remaining positions of the tubular material 100. In this way, the thickness of the tubular material 100 can be detected by using the present detection device, and during the detection, it can be inserted into the interior of the tubular material 100 for detection.During the test, it is also possible to determine whether the thickness inside and outside the tubular material 100 has changed, so as to determine whether the overall wall thickness of the tubular material 100 is qualified.
[0036] like Figure 8 and Fig. 9 As shown, it also includes a dust suction mechanism, which includes a dust collecting hood 101, a dust collector 102, a mounting hood 1021, a blocking net 1022, a connecting pipe 103 and a collecting frame 104. The connecting sleeve 1 is connected to the dust collecting hood 101, and a detachable mounting hood 1021 is threadedly connected to the dust collecting hood 101. The mounting hood 1021 is connected to a blocking net 1022, and the mounting hood 1021 is installed with a dust collector 102. The suction end of the dust collector 102 extends into the interior of the mounting hood 1021. A dust collecting chamber is formed between the mounting hood 1021, the interior of the dust collecting hood 101 and the connecting sleeve 1. Four connecting pipes 103 are evenly spaced along the circumferential direction on the dust collecting hood 101, and collecting frames 104 are installed on four rotating brackets 21. The connecting pipe 103 is connected to the collecting frame 104.
[0037] When the detection device moves inside the tubular material 100, it can control the operation of the vacuum cleaner 102 to generate negative pressure in the dust collecting chamber, thereby allowing the collecting frame 104 to generate suction through the connecting pipe 103, and to remove impurities attached to the inner wall of the tubular material 100 to prevent the impurities from obstructing the detection of the distance sensor 1 71 and the distance sensor 2 72. The blocking net 1022 can block the impurities and make them fall into the dust collecting cover 101. When it is necessary to clean the impurities inside the dust collecting cover 101, the mounting cover 1021 can be rotated to remove the mounting cover 1021, and then it can be cleaned.
[0038] like Figure 10-13 As shown, a cleaning mechanism is also included, which includes a brush 111, a drive motor 113, a cam 114 and a guide rail 115. The brush 111 is slidably connected in the collection frame 104, and a drive motor 113 is installed at the bottom of the collection frame 104. The cam 114 is connected to the output shaft of the drive motor 113, and the guide rail 115 is connected to the bottom of the sliding frame. A convex shaft 112 is provided on the cam 114, and the convex shaft 112 is located in the guide rail 115 and can slide in the guide rail 115, so that the cam 114 can squeeze the guide rail 115 to move through the convex shaft 112 when rotating, thereby driving the sliding frame to move.
[0039] When the collecting frame 104 moves, the driving motor 113 can be controlled to drive the cam 114 to rotate. When the cam 114 rotates, the convex shaft 112 thereon squeezes the guide track 115 to move. When the guide track 115 moves, it drives the brush 111 to move. When the brush 111 moves, it can remove impurities such as iron filings attached to the inner wall of the tubular material 100, so as to prevent impurities from adhering to the inner wall of the tubular material 100 and hindering detection.
[0040] like Fig.14 and Fig.15 As shown, it also includes a synchronous moving mechanism, which includes a rotating shaft 121, a winding drum 122 and a connecting rope 123. The rotating shaft 121 is rotatably connected to the middle part of the connecting sleeve 1, and the winding drum 122 is connected to the rotating shaft 121. Four connecting ropes 123 are evenly spaced along the circumferential direction on the winding drum 122. The ends of the four connecting ropes 123 are respectively connected to four connecting brackets 2, so that when the rotating shaft 121 rotates, the connecting ropes 123 can be retracted through the winding drum 122, and the connecting ropes 123 can pull the connecting bracket 2 to move.
[0041] When it is necessary to pull the connecting bracket 2 toward the connecting sleeve 1, the rotating shaft 121 can be rotated to drive the winding drum 122 to rotate and reel in the connecting rope 123, thereby driving the four connecting brackets 2 to move together. The effect of driving the four connecting brackets 2 to move can be achieved by only rotating the rotating shaft 121, which is more convenient to operate and has higher overall efficiency.
[0042] This embodiment also provides a method for detecting thickness of construction materials, and the specific steps are as follows: S1: Place the cylindrical magnet 4 at the edge of the tubular material 100 with detection, so that the rear side of the cylindrical magnet 4 is located at the tubular material 100, and the distance sensor 71 is located at the front side of the tubular material 100, S2: Put the connecting sleeve 1 into the tubular material 100, and control the position of the second distance sensor 72 at the front side of the tubular material 100 so that the second distance sensor 72 is aligned with the first distance sensor 71; S3: Start the distance sensor 1 71 and the distance sensor 2 72 to detect the distance between the distance sensor 1 71 and the distance sensor 2 72 to obtain the distance A, and transmit the distance A to the control panel 22; S4: Control the electric wheel 5 to drive the connecting sleeve 1, the connecting bracket 2 and the rotating bracket 21 to move into the tubular material 100. During the movement, the electromagnet 3 can drive the cylindrical magnet 4 to move together. The cylindrical magnet 4 and the electromagnet 3 respectively drive the distance sensor 1 71 and the distance sensor 2 72 to move to align with the inner wall and outer wall of the tubular material 100. The distance sensor 1 71 detects the distance between it and the outer wall of the tubular material 100 to obtain the distance B and transmits it to the control panel 22. The distance sensor 2 72 detects the distance between it and the inner wall of the tubular material 100 to obtain the distance C and transmits it to the control panel 22. Then the control panel 22 subtracts the distances B and C from the distance A to obtain D, and D is the wall thickness of the tubular material 100, so as to achieve the effect of detecting the wall thickness.
[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.
Claims
1. A device for detecting the thickness of construction materials, characterized in that: The invention comprises a connecting sleeve (1), a connecting bracket (2), a rotating bracket (21), a control panel (22), an electromagnet (3), a cylindrical magnet (4), an elastic member 1 (6), a driving mechanism and an auxiliary moving mechanism. The connecting sleeve (1) is evenly and slidably connected to the connecting bracket (2) along the circumferential direction. The rotating bracket (21) is rotatably connected to the connecting bracket (2). The rotating bracket (21) is mounted with an electromagnet (3). The cylindrical magnet (4) and the electromagnet (3) can be attracted to each other. An elastic member 1 (6) is connected between the connecting bracket (2) and the connecting sleeve (1). A distance sensor 1 (71) is mounted on the cylindrical magnet (4). A distance sensor 2 (72) is mounted on the electromagnet (3). The connecting sleeve (1) is mounted with a control panel (22). Both the distance sensor 1 (71) and the distance sensor 2 (72) are electrically connected to the control panel (22). The connecting bracket (2) is provided with a driving mechanism for driving the rotating bracket (21) to rotate. The cylindrical magnet (4) is provided with an auxiliary moving mechanism.
2. A device for detecting thickness of construction materials according to claim 1, characterized in that: It also includes an electric wheel (5), and each of the multiple rotating brackets (21) is provided with an electric wheel (5) installed on one side away from each other, which facilitates the movement of the device for detecting the thickness of construction materials.
3. A device for detecting thickness of construction materials according to claim 1, characterized in that: The driving mechanism comprises a motor (81) and a transmission gear (82); the motor (81) is mounted on the connecting bracket (2); the output shaft of the motor (81) and the rotating bracket (21) are both connected to the transmission gear (82); the two transmission gears (82) are meshed with each other.
4. A device for detecting thickness of construction materials according to claim 1, characterized in that: The auxiliary movement mechanism comprises a sliding sleeve (91), a ball (92) and a second elastic member (93); a plurality of sliding sleeves (91) are evenly spaced and connected to the cylindrical magnet (4) along the circumferential direction; a ball (92) is rotatably connected to the bottom of the sliding sleeve (91); and the second elastic member (93) is connected between the sliding sleeve (91) and the cylindrical magnet (4).
5. A device for detecting thickness of construction materials according to claim 1, characterized in that: The device also comprises a dust collection mechanism, the dust collection mechanism comprising a dust collecting hood (101), a dust collector (102), a mounting hood (1021), a blocking net (1022), a connecting pipe (103) and a collecting frame (104); the connecting sleeve (1) is connected to the dust collecting hood (101); a detachable mounting hood (1021) is threadedly connected to the dust collecting hood (101); the mounting hood (1021) is connected to the blocking net (1022); the mounting hood (1021) is connected to the dust collecting hood (101); ) is mounted on the mounting cover (102), the suction end of the vacuum cleaner (102) extends into the interior of the mounting cover (1021), the mounting cover (1021), the interior of the dust collecting cover (101) and the connecting sleeve (1) form a dust collecting chamber, four connecting pipes (103) are connected to the dust collecting cover (101) at evenly spaced intervals along the circumferential direction, and a collecting frame (104) is mounted on each of the four rotating brackets (21), the connecting pipes (103) being connected to the collecting frame (104).
6. A device for detecting thickness of construction materials according to claim 5, characterized in that: The invention also comprises a cleaning mechanism, the cleaning mechanism comprising a brush (111), a drive motor (113), a cam (114) and a guide track (115); the brush (111) is slidably connected inside the collection frame (104); the drive motor (113) is installed at the bottom of the collection frame (104); the cam (114) is connected to the output shaft of the drive motor (113); the guide track (115) is connected to the bottom of the sliding frame; the cam (114) is provided with a convex shaft (112); the convex shaft (112) is located inside the guide track (115) and can slide inside the guide track (115).
7. A device for detecting thickness of construction materials according to claim 1, characterized in that: The invention also comprises a synchronous movement mechanism, the synchronous movement mechanism comprising a rotating shaft (121), a winding drum (122) and a connecting rope (123); the central part of the connecting sleeve (1) is rotatably connected to the rotating shaft (121); the winding drum (122) is connected to the rotating shaft (121); four connecting ropes (123) are connected to the winding drum (122) at even intervals in the circumferential direction; the ends of the four connecting ropes (123) are respectively connected to four connecting brackets (2).
8. A method for detecting thickness of construction materials based on the device for detecting thickness of construction materials according to claim 2, characterized in that: The specific steps are as follows: S1: placing a cylindrical magnet (4) on the edge of a tubular material (100) with detection, so that the rear side of the cylindrical magnet (4) is located at the tubular material (100), and the distance sensor 1 (71) is located at the front side of the tubular material (100); S2: placing a connecting sleeve (1) into the tubular material (100), and controlling the position of the distance sensor 2 (72) at the front side of the tubular material (100), so that the distance sensor 2 (72) is aligned with the distance sensor 1 (71); S3: starting the distance sensor 1 (71) and the distance sensor 2 (72) to detect the distance between the distance sensor 1 (71) and the distance sensor 2 (72), obtaining the distance A, and transmitting the distance A to the control panel (22); S4: controlling the electric wheel (5) to operate to drive the connecting sleeve (1) and the connecting support The frame (2) and the rotating bracket (21) move into the interior of the tubular material (100). During the movement, the electromagnet (3) can drive the cylindrical magnet (4) to move together. The cylindrical magnet (4) and the electromagnet (3) respectively drive the distance sensor 1 (71) and the distance sensor 2 (72) to move to align with the inner wall and outer wall of the tubular material (100). The distance sensor 1 (71) detects the distance between it and the outer wall of the tubular material (100) to obtain a distance B and transmits it to the control panel (22). The distance sensor 2 (72) detects the distance between it and the inner wall of the tubular material (100) to obtain a distance C and transmits it to the control panel (22). Subsequently, the control panel (22) subtracts the distances B and C from the distance A to obtain D, and D is the wall thickness of the tubular material (100), so as to achieve the effect of detecting the wall thickness.