Building concrete structure defect detection device based on nondestructive technology

Abstract

The invention discloses a building concrete structure defect detection device based on a nondestructive technology, relates to the related field of concrete structure defect detection, and aims to solve the problems that in the prior art, the detection range is limited, and when a large building structure is detected, comprehensive detection can be realized by repeated scanning and splicing for multiple times. A longitudinal fixing strip and a longitudinal C-shaped strip are fixed to the two sides of the upper end of the supporting base correspondingly, first racks are fixed to the upper end and the lower end of the inner side of the longitudinal C-shaped strip correspondingly, and the first rotating gears are meshed with the first racks; a vertical C-shaped strip is fixed to one side of the upper end of the upper longitudinal moving seat, and second racks are fixed to the front end and the rear end of the inner side of the vertical C-shaped strip. And one side of the vertical C-shaped strip is slidably connected with an upper vertical moving seat, the second rotating gear is connected with the second rack in a meshed mode, and a concrete scanning radar is installed on the side, away from the vertical C-shaped strip, of the upper end of the upper vertical moving seat.

Description

Technical Field

[0001] The present invention relates to the field of concrete structure defect detection, and specifically to a detection device for concrete structure defects in buildings based on non-destructive technology. Background Technique

[0002] As the main structural form of modern buildings, concrete structures are widely used in various projects due to their good compressive performance, durability, and economy. However, due to various factors during the construction process, such as raw material quality, mix ratio, construction technology, etc., various defects may occur inside and on the surface of concrete structures, such as cracks, cavities, mud inclusions, loose areas, etc. These defects not only affect the overall performance of concrete structures but also may pose a serious threat to the safe use of buildings. Therefore, accurate detection of defects in concrete structures has become an important link to ensure project quality and building safety.

[0003] Traditional concrete structure defect detection methods, such as the tapping method, core drilling method, etc., often cause certain damage to the concrete structure, and the detection efficiency is low, making it difficult to meet the requirements of modern projects for detection accuracy and efficiency. With the progress of technology, non-destructive testing techniques have gradually been applied to concrete structure defect detection. Non-destructive testing techniques can accurately detect and evaluate defects inside concrete without damaging the concrete structure, providing strong support for project quality control. Commonly used non-destructive testing methods include ultrasonic method, impact echo method, infrared imaging method, radar scanning method, etc.

[0004] For example, in the Chinese authorized patent with the publication number CN 215116764 U (a radar scanning device for detecting the secondary lining concrete of a tunnel): a support base is arranged on the operation platform, a horizontally placed rotating disk is arranged on the support base, an electric hydraulic push rod is arranged on the rotating disk, a channel-shaped moving frame is arranged at the upper end of the electric hydraulic push rod, an installation box is arranged inside the channel-shaped moving frame, a radar antenna is arranged inside the installation box, a pressure sensor located inside the installation box is arranged at the lower end of the radar antenna, an installation frame is arranged at the lower end of the side wall of the electric hydraulic push rod, and a radar main unit is arranged on the installation frame; the pressure sensor, the electric hydraulic push rod are electrically connected to the PLC controller.

[0005] Although the above-mentioned prior art has the function of detecting internal defects of concrete, the detection range is limited. When detecting large building structures, multiple repeated scans and splicing are required to achieve comprehensive detection. Summary of the Invention

[0006] The purpose of the present invention is to provide a detection device for concrete structure defects in buildings based on non-destructive technology to solve the problem of limited detection range proposed in the above background technique, that is, when detecting large building structures, multiple repeated scans and splicing are required to achieve comprehensive detection.

[0007] To achieve the above object, the present invention provides the following technical solution: A building concrete structure defect detection device based on non-destructive technology, including a support base, on both sides of the upper end of the support base, a longitudinal fixing strip and a longitudinal C-shaped strip are respectively fixed. At the upper and lower ends inside the longitudinal C-shaped strip, first racks are fixed. A longitudinal moving seat is slidably connected to the upper ends of the longitudinal fixing strip and the longitudinal C-shaped strip. A driving motor is installed at the lower end of the longitudinal moving seat. A first rotating worm is installed at the output shaft end of the driving motor. A first rotating worm wheel is meshed and connected to one side of the first rotating worm. The upper and lower ends of the first rotating worm wheel are connected to a first rotating gear through a driving shaft. The first rotating gear is meshed with the first rack. On one side of the upper end of the longitudinal moving seat, a vertical C-shaped strip is fixed. Second racks are fixed at the front and rear ends inside the vertical C-shaped strip. An upper vertical moving seat is slidably connected to one side of the vertical C-shaped strip. A second rotating worm is arranged at one side of the lower end of the upper vertical moving seat. The lower end of the second rotating worm is meshed and connected to a second rotating worm wheel. The front and rear ends of the second rotating worm wheel are coaxially connected to a second rotating gear. The second rotating gear is meshed and connected to the second rack. A concrete scanning radar is installed on one side of the upper end of the upper vertical moving seat away from the vertical C-shaped strip.

[0008] Preferably, the longitudinal fixing strip and the longitudinal C-shaped strip extend outwards in the front and rear directions; the upper end of the driving shaft extends upwards through the longitudinal moving seat and is connected to a first bevel gear. A second bevel gear is meshed and connected to one side of the first bevel gear. The second bevel gear is coaxially connected to the second rotating worm. The connection shaft of the upper vertical moving seat with the second bevel gear and the second rotating worm is connected through a first bearing plate. The connection shaft of the upper vertical moving seat with the second rotating worm wheel and the second rotating gear is connected through a second bearing plate.

[0009] Preferably, the driving shaft includes a lower connecting shaft. The lower connecting shaft is connected to the first rotating worm wheel and the first rotating gear through a keyway. The upper end of the lower connecting shaft is fixed with an upper fixed sleeve. The upper end of the upper fixed sleeve passes through the longitudinal moving seat and extends upwards. The upper fixed sleeve is connected to the longitudinal moving seat through a bearing. A first limiting groove is formed on the inner surface of the upper fixed sleeve. A transition sleeve is slidably connected inside the upper fixed sleeve. A first limiting strip is fixed at a position corresponding to the first limiting groove on the outer surface of the transition sleeve. The first limiting strip is in conformity with the shape of the first limiting groove. A second limiting groove is formed on the inner surface of the transition sleeve. An intermediate shaft body is slidably connected inside the transition sleeve. A second limiting strip is fixed at a position corresponding to the second limiting groove on the outer surface of the intermediate shaft body. The second limiting strip is in conformity with the shape of the second limiting groove. The upper end of the intermediate shaft body is connected to the first bevel gear. The first bevel gear is rotationally connected to the upper vertical moving seat through a shaft.

[0010] Preferably, rotating wheels are installed at the four corners of the lower end of the support base. The rotating wheel includes a rotating disc, and a connecting column is connected to the lower end of the rotating disc. A C-shaped fixing frame is fixedly penetrated through the connecting column from front to back. The other two ends of the C-shaped fixing frame are bent downward and fixed with a first fixing seat. A shock-absorbing rod is rotatably connected to the first fixing seat through a shaft. One end of the two shock-absorbing rods away from the first fixing seat is rotatably connected to the main body of the rotating wheel through a shaft.

[0011] Preferably, the upper end of the shock-absorbing rod is rotatably connected to a second fixing seat through a shaft. A damping shock absorber is installed at the upper end of the second fixing seat. An upper connecting block is fixed to the upper end of the damping shock absorber. The upper end of the upper connecting block is rotatably connected to a third fixing seat through a shaft. An upper fixing cross plate is fixed to the upper end of the third fixing seat. The other end of the upper fixing cross plate is fixed to the C-shaped fixing frame.

[0012] Preferably, a side fixing plate is fixedly centered on one side of the support base. A threaded rod is threadedly connected to the side fixing plate. The lower end of the threaded rod is connected to a support plate through a bearing. A plurality of fixing spikes are fixedly arranged in an array at the lower end of the support plate.

[0013] Preferably, longitudinal limiting rods are fixed to the upper ends of the longitudinal fixing strip and the longitudinal C-shaped strip through fixing vertical plates. Longitudinal limiting sliding blocks are fixed to both sides of the lower end of the upper longitudinal moving seat. The longitudinal limiting sliding blocks slide along the longitudinal limiting rods in a limited manner.

[0014] Preferably, an upper fixing plate is fixed to the upper end of the vertical C-shaped strip. Vertical limiting rods are fixed between the upper fixing plate and the upper longitudinal moving seat along the front and rear ends of the vertical C-shaped strip. Side limiting parts are integrally connected to the front and rear ends of one side of the upper vertical moving seat. The side limiting parts slide along the vertical limiting rods in a limited manner.

[0015] Preferably, a pushing bracket is fixed to one side of the upper end of the support base away from the longitudinal C-shaped strip. A display screen is installed on the pushing bracket. There is a control box at the lower end of the display screen. The control box is electrically connected to the concrete scanning radar.

[0016] Preferably, push handles are fixed to the two terminals of the pushing bracket.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) In this invention, through the meshing connection relationship between the first rotating worm and the first rotating worm gear, the coaxial connection relationship between the first rotating worm gear and the first rotating gear, the meshing connection relationship between the first rotating gear and the first rack, the shaft connection relationship between the first bevel gear and the first rotating gear and the first rotating worm gear, the meshing connection relationship between the first bevel gear and the second bevel gear, the coaxial connection relationship between the second bevel gear and the second rotating worm, the coaxial connection relationship between the second rotating worm gear and the second rotating gear, and the meshing connection relationship between the second rotating gear and the second rack, the concrete scanning radar can move back and forth and up and down within the outer space of the concrete structure for omnidirectional scanning. Compared with the fixed structure, the scanning area is larger. Coupled with the scanning range of the concrete scanning radar itself, the scanning range is expanded, solving the problem of limited detection range. When detecting the structure of a large building, multiple repeated scans and mosaics are required to achieve comprehensive detection.

[0018] (2) In this invention, by using the transmission system of the drive motor, rotating worm, rotating worm gear and rotating gear, the rapid and precise movement of the scanning device in the longitudinal and vertical directions is realized, greatly improving the detection efficiency. At the same time, the first bevel gear is connected to the first rotating gear and the first rotating worm gear through a drive shaft, and the upper fixed sleeve, transition sleeve and intermediate shaft body on the drive shaft can ensure that the rotation of the lower structure can drive the rotation of the upper structure while not affecting the up and down movement of the upper structure through the limiting sliding of the first limiting groove and the first limiting strip and the second limiting groove and the second limiting strip, making the coordination between the forward and backward movement and the up and down movement higher and the integrity of the equipment stronger.

[0019] (3) In this invention, damping shock absorbers are adopted to effectively absorb the vibration during the pushing process, protect the device from damage, and at the same time ensure the stable operation of the scanning radar and improve the accuracy of the scanning results. After reaching the target position, rotate the threaded rod so that the support plate moves downward until the fixed spikes are inserted into the ground, ensuring that the equipment will not displace during the scanning process and improving the scanning accuracy. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of a building concrete structure defect detection device based on non-destructive technology from the main perspective of the present invention; Figure 2 It is a schematic diagram of the overall structure of a building concrete structure defect detection device based on non-destructive technology from the lower perspective of the present invention; Figure 3 It is an enlarged view of the structure at A of a building concrete structure defect detection device based on non-destructive technology of the present invention; Figure 4 It is a schematic diagram of the structure of the rotating wheel of a building concrete structure defect detection device based on non-destructive technology of the present invention; Figure 5Front view of a building concrete structure defect detection device based on non-destructive technology of the present invention; Figure 6 Top view of a building concrete structure defect detection device based on non-destructive technology of the present invention; Figure 7 Schematic connection structure diagram of the first rack, the first rotating worm, the first rotating worm gear and the first rotating gear of a building concrete structure defect detection device based on non-destructive technology of the present invention; Figure 8 Schematic connection structure diagram of the first bevel gear, the upper vertical moving seat, the vertical C-shaped bar, the second bevel gear, the second rotating worm, the second rotating worm gear, the second rotating gear and the second rack of a building concrete structure defect detection device based on non-destructive technology of the present invention; Figure 9 Schematic structure diagram of the drive shaft of a building concrete structure defect detection device based on non-destructive technology of the present invention.

[0021] In the figure: 1, support base; 2, side fixing plate; 3, threaded rod; 4, support plate; 5, fixing thorn; 6, rotating wheel; 7, rotating disc; 8, connecting column; 9, C-shaped fixing frame; 10, first fixing seat; 11, shock-absorbing rod; 12, runner body; 13, second fixing seat; 14, damping shock absorber; 15, upper connecting block; 16, upper fixing cross plate; 17, third fixing seat; 18, longitudinal fixing bar; 19, longitudinal C-shaped bar; 20, first rack; 21, longitudinal limiting rod; 22, upper longitudinal moving seat; 23, longitudinal limiting sliding block; 24, drive motor; 25, first rotating worm; 26, first rotating worm gear; 27, first rotating gear; 28, drive shaft; 29, lower connecting shaft; 30, upper fixing sleeve; 31, first limiting groove; 32, transition sleeve; 33, first limiting strip; 34, second limiting groove; 35, intermediate shaft body; 36, second limiting strip; 37, first bevel gear; 38, upper vertical moving seat; 39, side limiting part; 40, vertical C-shaped bar; 41, upper fixing plate; 42, vertical limiting rod; 43, second bevel gear; 44, second rotating worm; 45, second rotating worm gear; 46, second rotating gear; 47, second rack; 48, concrete scanning radar; 49, pushing bracket; 50, push handle; 51, display screen. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] (1) Overall structure, such as Figure 1 , Figure 2 ,Figure 5 and Figure 6 as shown in It includes a support base 1. On both sides of the upper end of the support base 1, a longitudinal fixing strip 18 and a longitudinal C-shaped strip 19 are respectively fixed. These two structures are used to support and guide the movement of the scanning structure; the longitudinal fixing strip 18 and the longitudinal C-shaped strip 19 extend outward both front and back. A upper longitudinal moving seat 22 is slidably connected to the upper ends of the longitudinal fixing strip 18 and the longitudinal C-shaped strip 19. On one side of the upper end of the upper longitudinal moving seat 22, a vertical C-shaped strip 40 is fixed. A upper vertical moving seat 38 is slidably connected to one side of the vertical C-shaped strip 40.

[0024] On one side of the upper end of the upper vertical moving seat 38 far from the vertical C-shaped strip 40, a concrete scanning radar 48 is installed. The concrete scanning radar 48 analyzes the internal structure characteristics of the concrete by emitting high-frequency electromagnetic waves and measuring their reflection time. On one side of the upper end of the support base 1 far from the longitudinal C-shaped strip 19, a pushing bracket 49 is fixed. At both ends of the pushing bracket 49, push hands 50 are fixed. A display screen 51 is installed on the pushing bracket 49. There is a control box at the lower end of the display screen 51. The control box is electrically connected to the concrete scanning radar 48.

[0025] This part of non-destructive testing uses radar scanning technology. The radar scanning module emits electromagnetic waves and receives the reflected signals, and transmits the data to the control module for processing. The control module processes and analyzes the data in real time, generates defect images and reports, and displays them.

[0026] The concrete scanning radar 48 includes a radar transmitter and a receiver, which are used to emit electromagnetic waves into the concrete structure and receive the reflected signals to detect internal defects. The control box integrates modules such as a CPU processing module, a signal amplification module, a data storage module, and a data transmission module, and performs processing such as amplification, filtering, and A / D conversion on the received reflected wave signals, and converts them into defect images inside the concrete structure through signal processing algorithms. This part of the processing technology is relatively mature.

[0027] (2) Longitudinal sliding structure, such as Figure 1 , Figure 2 , Figures 5 - 7 as shown in At both the upper and lower ends inside the longitudinal C-shaped strip 19, first racks 20 are fixed; a driving motor 24 is installed at the lower end of the upper longitudinal moving seat 22. At the end of the output shaft of the driving motor 24, a first rotating worm 25 is installed. A first rotating worm gear 26 is meshed and connected to one side of the first rotating worm 25. At the upper and lower ends of the first rotating worm gear 26, a first rotating gear 27 is connected through a driving shaft 28. The first rotating gear 27 is meshed with the first rack 20 to realize the power transmission of longitudinal movement, ensuring the accuracy and stability of longitudinal movement and improving the scanning efficiency.

[0028] Both the upper ends of the longitudinal fixing bar 18 and the longitudinal C-shaped bar 19 are fixed with longitudinal limiting rods 21 through fixing vertical plates. On both sides of the lower end of the upper longitudinal moving seat 22, longitudinal limiting sliding blocks 23 are fixed, and the longitudinal limiting sliding blocks 23 slide along the longitudinal limiting rods 21 in a limited manner.

[0029] (3) The vertical sliding structure is as Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 8 and Figure 9 shown as: At the front and rear ends inside the vertical C-shaped bar 40, second racks 47 are fixed. On one side of the lower end of the upper vertical moving seat 38, a second rotating worm 44 is arranged. The lower end of the second rotating worm 44 is meshed and connected with a second rotating worm gear 45. Coaxially connected to the front and rear ends of the second rotating worm gear 45 are second rotating gears 46, and the second rotating gears 46 are meshed and connected with the second racks 47 to achieve vertical movement.

[0030] The upper end of the drive shaft 28 extends upward through the upper longitudinal moving seat 22 and is connected with a first bevel gear 37. One side of the first bevel gear 37 is meshed and connected with a second bevel gear 43. The second bevel gear 43 is coaxially connected with the second rotating worm 44. The connection shaft of the upper vertical moving seat 38 with the second bevel gear 43 and the second rotating worm 44 is connected through a first bearing plate. The connection shaft of the upper vertical moving seat 38 with the second rotating worm gear 45 and the second rotating gears 46 is connected through a second bearing plate.

[0031] The upper end of the vertical C-shaped bar 40 is fixed with an upper fixing plate 41. Between the upper fixing plate 41 and the upper longitudinal moving seat 22, vertical limiting rods 42 are fixed along the front and rear ends of the vertical C-shaped bar 40. At the front and rear ends on one side of the upper vertical moving seat 38, side limiting parts 39 are integrally connected, and the side limiting parts 39 slide along the vertical limiting rods 42 in a limited manner.

[0032] The drive shaft 28 includes a lower connecting shaft 29. The lower connecting shaft 29 connects the first rotating worm wheel 26 and the first rotating gear 27 through a keyway. At the upper end of the lower connecting shaft 29, an upper fixing sleeve 30 is fixed. The upper end of the upper fixing sleeve 30 passes through the upper longitudinal moving seat 22 and extends upward. The upper fixing sleeve 30 is connected to the upper longitudinal moving seat 22 through a bearing. A first limiting groove 31 is provided on the inner surface of the upper fixing sleeve 30. A transition sleeve 32 is slidably connected inside the upper fixing sleeve 30. At a position corresponding to the first limiting groove 31 on the outer part of the transition sleeve 32, a first limiting strip 33 is fixed. The first limiting strip 33 matches the shape of the first limiting groove 31. A second limiting groove 34 is provided on the inner surface of the transition sleeve 32. An intermediate shaft body 35 is slidably connected inside the transition sleeve 32. At a position corresponding to the second limiting groove 34 on the outer part of the intermediate shaft body 35, a second limiting strip 36 is fixed. The second limiting strip 36 matches the shape of the second limiting groove 34. The upper end of the intermediate shaft body 35 is connected to the first bevel gear 37. The first bevel gear 37 is rotationally connected to the upper vertical moving seat 38 through a shaft. The main purpose of this part of the structure is to ensure the synchronous movement of the upper and lower parts of the structure while ensuring that the up and down movement of the upper part of the structure does not affect the rotation reaction.

[0033] (4) The moving structure is as Figure 2 and Figure 4 shown: Rotating wheels 6 are installed at the four corners of the lower end of the support base 1. The rotating wheel 6 includes a rotating disc 7 and a connecting column 8. A C-shaped fixing frame 9 is fixedly penetrated through the front and back inside the connecting column 8. The other two ends of the C-shaped fixing frame 9 are bent downward and fixed with a first fixing seat 10. A shock-absorbing rod 11 is rotationally connected inside the first fixing seat 10 through a shaft. One end of the two shock-absorbing rods 11 away from the first fixing seat 10 is rotationally connected through a shaft with a runner main body 12. The upper end of the shock-absorbing rod 11 is rotationally connected through a shaft with a second fixing seat 13. A damping shock absorber 14 is installed at the upper end of the second fixing seat 13. The upper end of the damping shock absorber 14 is fixed with an upper connecting block 15. The upper end of the outer part of the upper connecting block 15 is rotationally connected through a shaft with a third fixing seat 17. The upper end of the third fixing seat 17 is fixed with an upper fixing cross plate 16. The other end of the upper fixing cross plate 16 is fixed with the C-shaped fixing frame 9.

[0034] This design effectively absorbs the vibration during the pushing process and protects the stability of the device and the accuracy of the scanning result.

[0035] (5) The fixing structure is as Figures 1 - 3 shown: A side fixing plate 2 is fixedly centered on one side of the support base 1. A threaded rod 3 is threadedly connected inside the side fixing plate 2. The lower end of the threaded rod 3 is connected through a bearing with a support plate 4. A plurality of fixing spikes 5 are fixedly arrayed at the lower end of the support plate 4, enabling the device to be firmly fixed at the detection position.

[0036] Working principle: Push the device to the detection position. During the pushing process, the wheel body 12 will rotate around the central axis of the first fixing seat 10 and the shock absorber rod 11 under the action of the damping shock absorber 14, and the damping shock absorber 14 plays a shock-absorbing role for shock absorption. After reaching the target position, rotate the threaded rod 3 to make the support plate 4 move downward until the fixing spikes 5 contact the ground, and continue to rotate the threaded rod 3 to drive the fixing spikes 5 to insert into the ground.

[0037] The driving motor 24 drives the first rotating worm 25 to rotate. Through the meshing connection relationship between the first rotating worm 25 and the first rotating worm gear 26, the first rotating worm gear 26 is driven to rotate, and the coaxially connected first rotating gear 27 rotates. Since the first rotating gear 27 meshes with the first rack 20, the first rotating gear 27 drives the upper longitudinal moving seat 22 and other structures at the upper end to move forward or backward.

[0038] Due to the connection relationship that the first bevel gear 37 is connected to the first rotating gear 27 and the first rotating worm gear 26 through the drive shaft 28, and the limiting relationship between the upper fixing sleeve 30, the transition sleeve 32 and the intermediate shaft body 35 on the drive shaft 28 through the first limiting groove 31 and the first limiting strip 33 as well as the second limiting groove 34 and the second limiting strip 36, the first bevel gear 37 is driven to rotate. The second bevel gear 43 meshing with the first bevel gear 37 rotates, and drives the second rotating worm 44 coaxially connected to the second bevel gear 43 to rotate. The second rotating worm gear 45 meshing with the second rotating worm 44 is driven to rotate, and the second rotating gear 46 coaxially connected to the second rotating worm gear 45 rotates synchronously. Due to the meshing connection relationship between the second rotating gear 46 and the second rack 47, the upper vertical moving seat 38 and its upper-end structure move up or down together.

[0039] The concrete scanning radar 48 moves within the outer space of the concrete structure for omnidirectional scanning. The radar scanning module emits electromagnetic waves and receives reflected signals, transmits the data to the control module for processing. The control module processes and analyzes the data in real time, generates defect images and reports, and displays them to the user through the display screen 51.

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A building concrete structure defect detection device based on non-destructive technology, comprising a support base (1), characterized in that: On both sides of the upper end of the support base (1), a longitudinal fixing strip (18) and a longitudinal C-shaped strip (19) are respectively fixed. At the upper and lower ends inside the longitudinal C-shaped strip (19), first rack bars (20) are fixed. A longitudinally upper moving seat (22) is slidably connected to the upper ends of the longitudinal fixing strip (18) and the longitudinal C-shaped strip (19). A driving motor (24) is installed at the lower end of the longitudinally upper moving seat (22). At the output shaft end of the driving motor (24), a first rotating worm (25) is installed. On one side of the first rotating worm (25), a first rotating worm gear (26) is meshingly connected. At the upper and lower ends of the first rotating worm gear (26), first rotating gears (27) are connected through a driving shaft (28). The first rotating gear (27) meshes with the first rack bar (20); On one side of the upper end of the longitudinally upper moving seat (22), a vertically C-shaped strip (40) is fixed. At the front and rear ends inside the vertically C-shaped strip (40), second rack bars (47) are fixed; A vertically upper moving seat (38) is slidably connected to one side of the vertically C-shaped strip (40). At one side of the lower end of the vertically upper moving seat (38), a second rotating worm (44) is arranged. At the lower end of the second rotating worm (44), a second rotating worm gear (45) is meshingly connected. At the front and rear ends of the second rotating worm gear (45), second rotating gears (46) are coaxially connected. The second rotating gear (46) is meshingly connected with the second rack bar (47). On the side of the upper end of the vertically upper moving seat (38) far from the vertically C-shaped strip (40), a concrete scanning radar (48) is installed.

2. The defect detection device for building concrete structure based on non-destructive technology according to claim 1, characterized in that: The longitudinal fixing strip (18) and the longitudinal C-shaped strip (19) extend outwards in the front and rear; The upper end of the driving shaft (28) extends upwards through the longitudinally upper moving seat (22) and is connected with a first bevel gear (37). On one side of the first bevel gear (37), a second bevel gear (43) is meshingly connected. The second bevel gear (43) is coaxially connected with the second rotating worm (44); The connecting shaft of the vertically upper moving seat (38) with the second bevel gear (43) and the second rotating worm (44) is connected through a first bearing plate. The connecting shaft of the vertically upper moving seat (38) with the second rotating worm gear (45) and the second rotating gear (46) is connected through a second bearing plate.

3. The defect detection device for building concrete structure based on non-destructive technology according to claim 1, characterized in that: The drive shaft (28) includes a lower connecting shaft (29). The lower connecting shaft (29) connects the first rotating worm wheel (26) and the first rotating gear (27) through a keyway. An upper fixed sleeve (30) is fixed to the upper end of the lower connecting shaft (29). The upper end of the upper fixed sleeve (30) passes through the upper longitudinal moving seat (22) and extends upward. The upper fixed sleeve (30) is connected to the upper longitudinal moving seat (22) through a bearing. A first limiting groove (31) is formed on the inner surface of the upper fixed sleeve (30). A transition sleeve (32) is slidably connected inside the upper fixed sleeve (30). A first limiting strip (33) is fixed at a position corresponding to the first limiting groove (31) on the outer part of the transition sleeve (32). The first limiting strip (33) is in conformity with the shape of the first limiting groove (31). A second limiting groove (34) is formed on the inner surface of the transition sleeve (32). An intermediate shaft body (35) is slidably connected inside the transition sleeve (32). A second limiting strip (36) is fixed at a position corresponding to the second limiting groove (34) on the outer part of the intermediate shaft body (35). The second limiting strip (36) is in conformity with the shape of the second limiting groove (34). The upper end of the intermediate shaft body (35) is connected to a first bevel gear (37). The first bevel gear (37) is rotationally connected to the upper vertical moving seat (38) through a shaft.

4. A defect detection device for building concrete structures based on non-destructive technology according to claim 1, characterized in that: Rotating wheels (6) are installed at the four corner positions at the lower end of the support base (1). The rotating wheel (6) includes a rotating disc (7). A connecting column (8) is connected to the lower end of the rotating disc (7). A C-shaped fixing frame (9) is fixedly penetrated through the front and back inside the connecting column (8). The other two ends of the C-shaped fixing frame (9) are bent downward and fixed with a first fixing seat (10). A shock-absorbing rod (11) is rotationally connected inside the first fixing seat (10) through a shaft. One ends of the two shock-absorbing rods (11) away from the first fixing seat (10) are rotationally connected through a shaft with a runner main body (12).

5. The defect detection device for building concrete structure based on non-destructive technology according to claim 4, characterized in that: The upper end of the shock-absorbing rod (11) is rotationally connected through a shaft with a second fixing seat (13). A damping shock absorber (14) is installed at the upper end of the second fixing seat (13). An upper connecting block (15) is fixed to the upper end of the damping shock absorber (14). The upper end of the upper connecting block (15) is rotationally connected through a shaft with a third fixing seat (17). An upper fixed cross plate (16) is fixed to the upper end of the third fixing seat (17). The other end of the upper fixed cross plate (16) is fixed to the C-shaped fixing frame (9).

6. The defect detection device for building concrete structure based on non-destructive technology according to claim 1, characterized in that: A side fixing plate (2) is fixedly centered on one side of the support base (1). A threaded rod (3) is threadedly connected inside the side fixing plate (2). The lower end of the threaded rod (3) is connected to a support plate (4) through a bearing. A plurality of fixing spikes (5) are fixedly arrayed at the lower end of the support plate (4).

7. An apparatus for detecting defects in a building concrete structure based on a non-destructive technique according to claim 1, characterized in that: Longitudinal limiting rods (21) are fixed to the upper ends of the longitudinal fixing strip (18) and the longitudinal C-shaped strip (19) through fixing vertical plates. Longitudinal limiting sliding blocks (23) are fixed to both sides at the lower end of the upper longitudinal moving seat (22). The longitudinal limiting sliding blocks (23) are limited and slide along the longitudinal limiting rods (21).

8. The defect detection device for building concrete structures based on non-destructive technology according to claim 1, characterized in that: An upper fixing plate (41) is fixed to the upper end of the vertical C-shaped strip (40). Vertical limiting rods (42) are fixed between the upper fixing plate (41) and the upper longitudinal moving seat (22) along the front and rear ends of the vertical C-shaped strip (40). Side limiting portions (39) are integrally connected to the front and rear ends on one side of the upper vertical moving seat (38), and the side limiting portions (39) are limited and slide along the vertical limiting rods (42).

9. A defect detection device for building concrete structures based on non-destructive technology according to claim 1, characterized in that: A pushing support (49) is fixed to one side of the upper end of the support base (1) away from the longitudinal C-shaped strip (19). A display screen (51) is installed on the pushing support (49). There is a control box at the lower end of the display screen (51), and the control box is electrically connected to the concrete scanning radar (48).

10. A defect detection device for building concrete structures based on non-destructive technology according to claim 9, characterized in that: Push handles (50) are fixed to the two terminals of the pushing support (49).

Images