A building wall detection device and method

Abstract

The application discloses a kind of building wall detection device and method, it is related to wall detection field, detection device includes several sets of installation box, the inner wall of installation box located outside is opened with positioning slot along height direction, the outer side wall of installation box located inside is fixed with positioning block, positioning block is close to the upper end surface of installation box, positioning block is slidably arranged in positioning slot and drives internal installation box to move upwards in sliding process, wall detector is installed in the side wall of installation box located in the most inside, lifting device is arranged in the installation box and drives internal several installation boxes to move upwards, the lifting device includes several sets of lifting cylinder, the upper end surface of lifting cylinder located in the most inside is fixed in the lower surface of installation box top plate located in the most inside, the lifting device further includes lifting mechanism in lifting cylinder and makes lifting cylinder lift.The application has the effect of facilitating detection to high wall interior.

Description

Technical Field

[0001] This application relates to the field of wall inspection, and in particular to a building wall inspection device and method. Background Technology

[0002] Wall detectors are used to detect various non-ferrous metals, reinforced steel, steel, wood, and (non-)energized cables inside walls. They also have a zoom function, which greatly reduces the risk of drilling errors. The wall detector uses a microwave directional antenna to emit a highly directional modulated microwave beam. When there is an obstruction or target between the receiving and transmitting antennas, the normal propagation of the microwaves is disrupted, causing the received microwave signal to weaken. This weakened signal is used to determine if there is intrusion between the receiver and transmitter.

[0003] In related technologies, in order to detect the internal structure of a wall, workers usually need to hold a wall detector and aim it at a certain position on the wall to detect it, while recording the internal condition of the wall at each position, so that they can perform operations such as drilling later.

[0004] In the process of developing this application, the inventors discovered that the technology has at least the following problems: when workers use handheld wall detectors to inspect various locations on the wall, and when it is necessary to inspect a wall in a relatively high location, workers need to use ladders to climb to a high place, which not only increases the labor intensity of the workers, but also poses certain safety hazards. Summary of the Invention

[0005] To facilitate the inspection of the interior of walls at high altitudes, this application provides a building wall inspection device and method.

[0006] Firstly, the building wall inspection device provided in this application adopts the following technical solution:

[0007] A building wall detection device includes several mounting boxes that are nested together. The inner wall of the outer mounting box has a positioning groove along the height direction. The outer wall of the inner mounting box has a positioning block fixed to it. The positioning block is close to the upper end face of the mounting box. The positioning block is slidably disposed in the positioning groove and drives the inner mounting box to move upward during sliding. A wall detector is installed on the side wall of the innermost mounting box. A lifting device is provided inside the mounting box to drive the inner mounting boxes to move upward. The lifting device includes several lifting cylinders that are nested together. The upper end face of the innermost lifting cylinder is fixed to the lower surface of the top plate of the innermost mounting box. The lifting device also includes a lifting mechanism disposed inside the lifting cylinder and raising and lowering the lifting cylinder.

[0008] By adopting the above technical solution, during the inspection process, the staff can first place the device in front of the wall to be inspected, so that the wall detector is facing the wall and moves in a direction parallel to the wall to detect the internal structure of the wall. When it is necessary to inspect a high position, the staff can act on the lifting mechanism to make the lifting mechanism drive the internal mounting box to move upward, thereby facilitating the wall detector to inspect the interior of the wall at a high position.

[0009] Optionally, the lifting mechanism includes several threaded cylinders sleeved together, each threaded cylinder corresponding to a lifting cylinder. The inner wall of the outer lifting cylinder has a sliding groove along its axial direction, and the outer wall of the inner lifting cylinder has a sliding rod that is slidably disposed in the corresponding sliding groove. A stop block is fixed to the inner wall of the upper end of the sliding groove, and a stop groove is formed on the sliding rod along its length direction. The stop block is slidably disposed in the stop groove and prevents adjacent lifting cylinders from separating. A drive motor is fixed inside the outermost lifting cylinder, and the output shaft of the drive motor is fixed to the lower end face of the innermost threaded cylinder. The lifting mechanism also includes a lifting assembly that drives several threaded cylinders to rotate synchronously and moves the corresponding lifting cylinder upward.

[0010] By adopting the above technical solution, the drive motor starts and drives the threaded cylinder to rotate. Under the action of the lifting component, several threaded cylinders rotate synchronously. During the rotation, the internal threaded cylinder moves upward, thereby causing the internal lifting cylinder to drive the internal mounting box to move upward, and then driving the wall detector to move upward, for detecting the internal structure of the wall at a high position.

[0011] Optionally, the outer wall of the inner threaded cylinder is provided with a guide groove along its axial direction. The lifting assembly includes a guide rod fixed to the inner wall of the outer threaded cylinder. The guide rod is slidably disposed in the corresponding guide groove. A threaded block is fixed to the lower end face of the lifting cylinder. The threaded block is sleeved on the adjacent threaded cylinder and threadedly connected to the outer wall of the adjacent threaded cylinder. An abutment cylinder coaxial with the threaded cylinder is fixed to the lower end of the threaded cylinder. The abutment cylinder abuts against the upper end face of the corresponding threaded block and pushes the abutment block to drive the inner threaded cylinder to move upward when the threaded cylinder moves upward.

[0012] By adopting the above technical solution, during the process of the drive motor driving the threaded cylinder to rotate, several threaded cylinders are driven to rotate synchronously under the action of the guide rod. At the same time, the threaded block is threadedly connected to the threaded cylinder, so that the threaded block rotates relative to the threaded cylinder. The threaded block moves upward and pushes the internal threaded cylinder to move upward, thereby causing several threaded cylinders to move upward during rotation, which in turn drives the lifting cylinder to move upward, so as to move the internal mounting box upward, which facilitates the wall detector to detect walls at high places.

[0013] Optionally, some of the mounting boxes have open ends facing the wall, and some of the inner mounting boxes have open lower ends. A mounting plate is fixed on the innermost mounting box. The mounting plate is vertically arranged and is used to close the side walls of the mounting boxes when they are in a retracted state. The wall detector is located on the side wall of the mounting plate facing the wall.

[0014] By adopting the above technical solution, the installation box is set with an opening facing the side wall of the wall, which facilitates internal maintenance and equipment replacement.

[0015] Optionally, the mounting plate is fixed with two parallel and horizontally arranged limiting plates, and a limiting frame that slides on the limiting plate and reciprocates along the length of the limiting plate is arranged. A vertically arranged support plate is fixed on the limiting frame, and a plurality of elastic clamping blocks are fixed on the support plate. The wall detector is fixed between the plurality of elastic clamping blocks, and the mounting box is provided with a driving device for driving the limiting frame to reciprocate.

[0016] By adopting the above technical solution, since the mounting box has a certain length, when the mounting box moves to a position close to the corner of the wall, the staff can act on the drive device to make the drive device drive the wall detector to move back and forth on the mounting box. When the wall detector moves to a position close to the edge of the mounting box and the mounting plate, it is convenient to detect the wall at the corner.

[0017] Optionally, the driving device includes two pulleys rotatably connected to the mounting plate, the pulleys being located between two limiting plates, a belt surrounding the two pulleys being provided on the pulleys, a connecting block being fixed to the outer wall of the pulleys, a connecting groove being provided on the limiting frame along the vertical direction, a connecting rod being fixed on the connecting block passing through the connecting groove and driving the limiting frame to reciprocate, and the driving device further includes a driving mechanism for driving the pulleys to rotate.

[0018] By adopting the above technical solution, the pulley rotates and drives the belt to move. The connecting block fixed on the belt drives the connecting rod to move. The connecting rod passes through the connecting groove. As the connecting block moves, the connecting rod slides in the connecting groove, thereby driving the limiting frame to reciprocate on the limiting plate, which facilitates the movement of the wall detector and makes it easier to detect the wall at the corner.

[0019] Optionally, the shaft of one of the pulleys extends into the mounting box, the drive mechanism includes a driven bevel gear coaxially fixed on the shaft, a telescopic member is rotatably connected inside the mounting box, a driving bevel gear meshing with the driven bevel gear is fixed on the telescopic member, and a drive assembly for driving the telescopic member to rotate is provided inside the mounting box.

[0020] By adopting the above technical solution, the rotation of the telescopic component drives the rotation of the active bevel gear, which in turn drives the rotation of the driven bevel gear. The driven bevel gear then drives one of the pulleys to rotate, thereby driving the belt to move. The belt then drives the connecting block and the connecting rod to move with the belt, and the connecting rod drives the limit frame to reciprocate.

[0021] Optionally, the telescopic component includes several telescopic cylinders that are sleeved together. The inner wall of the outer telescopic cylinder is provided with an anti-rotation groove along the axial direction. The outer wall of the inner telescopic cylinder is fixed with an anti-rotation rod that is slidably disposed in the anti-rotation groove. The innermost telescopic cylinder is rotatably connected to the innermost mounting box. The outermost telescopic cylinder is rotatably connected to the outermost mounting box. The active bevel gear is fixed to the upper end face of the innermost telescopic cylinder.

[0022] By adopting the above technical solution, the telescopic component is composed of several telescopic cylinders connected together, which makes it easy for people on the ground to rotate the telescopic cylinders at a low position, so that the telescopic cylinders drive the active bevel gear to rotate, thereby facilitating the movement of the driven bevel gear and the pulley.

[0023] Optionally, the mounting box has a through groove on the side wall away from the wall that communicates with the internal cavity and facilitates manual rotation of the telescopic cylinder.

[0024] By adopting the above technical solution, the through groove makes it easy to reach into the mounting box to rotate the telescopic cylinder.

[0025] Secondly, this application also discloses a detection method using the aforementioned building wall detection device, comprising the following steps:

[0026] S1. Place the device in front of the wall to be detected, so that the wall detector is facing the wall, and always move the device in a direction parallel to the wall.

[0027] S2. When the device moves to the two ends near the corner of the wall, the wall detector moves to both sides in the direction of the installation box, so that the wall detector can detect the position near the corner of the wall.

[0028] S3. After the mounting box is raised to a certain height in the vertical direction, repeat steps S1 and S2.

[0029] By adopting the above technical solution, when detecting walls at low locations, it is only necessary to move the mounting box in a direction parallel to the wall. When detecting walls at high locations, the mounting box inside moves the wall detector upwards. When detecting walls at corner locations, the operator can move the wall detector towards the front and rear side walls in the direction of the mounting box's movement to facilitate the detection of walls at corner locations.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. The drive motor drives several threaded cylinders to rotate synchronously. The threaded blocks threaded to the threaded cylinders push the adjacent threaded cylinders to move upward, thereby driving several lifting cylinders to move upward, which in turn drives the internal mounting box to move upward. The wall detector fixed on the mounting box moves upward and detects the wall at a high position.

[0032] 2. The limiting frame drives the wall detector to reciprocate on the mounting plate, which facilitates the wall detector to detect walls near the corners. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0034] Figure 2 This is a cross-sectional view of the lifting device according to an embodiment of this application.

[0035] Figure 3 yes Figure 2 A magnified structural diagram of part A in the middle.

[0036] Figure 4 This is a schematic diagram of the drive device.

[0037] Figure 5 This is a structural diagram of the telescopic component.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Mounting box; 2. Mounting plate; 3. Wall detector; 5. Lifting cylinder; 6. Threaded cylinder; 7. Sliding groove; 8. Sliding rod; 9. Guide groove; 11. Threaded block; 12. Limiting plate; 13. Support plate; 14. Elastic clamping block; 15. Pulley; 16. Belt; 17. Connecting block; 18. Connecting rod; 19. Connecting groove; 20. Driven bevel gear; 21. Driving bevel gear; 22. Telescopic cylinder; 23. Anti-rotation groove; 24. Anti-rotation rod; 25. Through groove; 26. Lifting motor; 27. Stop block; 28. Stop groove; 29. ​​Limiting frame; 30. Abutment cylinder; 31. Positioning groove. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0041] This application discloses a building wall inspection device.

[0042] Reference Figure 1A building wall inspection device includes several mounting boxes 1 nested together. Adjacent mounting boxes 1 are slidably connected. The inner wall of the outer mounting box 1 has a positioning groove 31 along the height direction. The outer wall of the inner mounting box 1 has a positioning block fixed to it. The positioning block is close to the upper end face of the mounting box 1 and is slidably positioned in the corresponding positioning groove 31. When the inner mounting box 1 moves upward, the positioning block slides in the positioning groove 31 and drives the inner mounting box 1 to move upward. The mounting boxes 1 are open to the side wall of the wall. The lower end face of the outermost mounting box 1 is closed, while the lower end face of the innermost mounting boxes 1 is open. A mounting plate 2 is fixed to the innermost mounting box 1. The mounting plate 2 is vertically positioned and parallel to the wall. When the mounting boxes 1 are retracted into the outermost mounting box 1, the mounting plate 2 closes the opening of the mounting boxes 1 facing the wall. The mounting plate 2 is equipped with a wall detector 3 for detecting the wall, and the bottom plate of the mounting box 1 is equipped with casters to facilitate the movement of the mounting box 1.

[0043] Reference Figure 1 and Figure 2 The installation box 1 is equipped with a lifting device that drives several installation boxes 1 inside to move upward. The lifting device includes several lifting cylinders 5 that are connected together. The upper end face of the innermost lifting cylinder 5 is fixed to the lower surface of the top plate of the innermost installation box 1, and the lower end face of the outermost lifting cylinder 5 is fixed to the upper surface of the bottom plate of the outermost installation box 1.

[0044] Reference Figure 2 and Figure 3 The lifting device also includes a lifting mechanism installed inside the lifting cylinder 5. The lifting mechanism includes several threaded cylinders 6 that are sleeved together. The upper end face of the outermost threaded cylinder 6 is rotatably connected to the lower end face of the innermost lifting cylinder 5. The inner wall of the outermost lifting cylinder 5 is provided with a sliding groove 7 along its axial direction. The sliding groove 7 passes through the lifting cylinder 5 along its axial direction. The outer wall of the innermost lifting cylinder 5 is integrally formed with a sliding rod 8. The sliding rod 8 is parallel to the axis of the lifting cylinder 5 and is slidably disposed in the adjacent sliding groove 7. A drive motor is fixed inside the outermost lifting cylinder 5. The output shaft of the drive motor is coaxial with the threaded cylinder 6 and the output shaft of the drive motor is fixed to the lower end face of the innermost lifting cylinder 5.

[0045] Reference Figure 2 and Figure 3 A stop block 27 is fixed on the inner wall of the upper end of the sliding groove 7. A stop groove 28 is provided on the sliding rod 8 along its length direction. The stop block 27 is slidably disposed in the stop groove 28 and prevents the inner lifting cylinder 5 from disengaging from the outer lifting cylinder 5 during the upward movement of the lifting cylinder 5.

[0046] Reference Figure 1 and Figure 2The lifting mechanism also includes a lifting assembly that drives several threaded cylinders 6 to rotate synchronously. The outer wall of the inner threaded cylinder 6 is provided with a guide groove 9 along its axial direction. The lifting assembly includes a guide rod integrally formed on the inner wall of the outer threaded cylinder 6. The guide rod is parallel to the axis of the threaded cylinder 6 and is slidably disposed in the corresponding guide groove 9. A threaded block 11 is fixed on the lower end face of the lifting cylinder 5. The threaded block 11 is sleeved on the adjacent threaded cylinder 6 and threadedly connected to the outer wall of the threaded cylinder 6. An abutment cylinder 30 coaxial with the threaded cylinder 6 is fixed on the lower end face of the threaded cylinder 6. The abutment cylinder 30 abuts against the upper end face of the corresponding threaded block 11.

[0047] The drive motor drives the innermost threaded cylinder 6 to rotate. Under the action of the guide rod, several threaded cylinders 6 rotate synchronously. The threaded block 11 threadedly connected to the corresponding threaded cylinder 6 moves upward. During the upward movement of the threaded block 11, it pushes the outer threaded cylinder 6 to move upward, thereby causing the threaded cylinder 6 to drive the lifting cylinder 5 to move upward. The lifting cylinder 5 pushes the inner mounting box 1 to move upward, which in turn drives the wall detector 3 to move upward, for detecting the internal structure of the wall at a high place.

[0048] Reference Figure 1 and Figure 4 The mounting plate 2 is fixed with two parallel limiting plates 12 facing the side wall of the wall. The limiting plates 12 are horizontally set. A limiting frame 29 that slides on the limiting plate 12 and reciprocates along the length of the limiting plate 12 is fixed. A vertically set support plate 13 is fixed on the limiting frame 29. Four elastic clamps 14 are fixed on the end face of the support plate 13 facing the wall. The wall detector 3 is clamped between the four elastic clamps 14. The mounting box 1 is equipped with a drive device to drive the limiting frame 29 to reciprocate. The driving device includes two pulleys 15 rotatably connected to the mounting plate 2. The two pulleys 15 are located between two limiting plates 12. A belt 16 is provided on the pulleys 15 and surrounds the two pulleys 15. A connecting block 17 is adhered to the outer wall of the pulleys 15. A connecting groove 19 is opened in the vertical direction on the limiting frame 29 and passes through the limiting frame 29. A connecting rod 18 is fixed on the connecting block 17 and passes through the connecting groove 19. When the belt 16 rotates around the two pulleys 15, the connecting rod 18 slides in the connecting groove 19 and drives the limiting frame 29 to reciprocate on the limiting plate 12, so that the wall detector 3 reciprocates on the mounting plate 2. When the wall detector 3 moves to both ends of the mounting plate 2, it is convenient for the wall detector 3 to detect the wall at the corner position.

[0049] Reference Figure 1 and Figure 5The drive unit also includes a drive mechanism for rotating a pulley 15, wherein the shaft of one pulley 15 extends into the mounting box 1. The drive mechanism includes a driven bevel gear 20 coaxially fixed on the shaft. A telescopic component and a drive assembly for rotating the telescopic component are rotatably connected inside the mounting box 1. The telescopic component includes several telescopic cylinders 22 sleeved together. The inner wall of the outer telescopic cylinder 22 is provided with an anti-rotation groove 23 along the axial direction. The anti-rotation groove 23 penetrates the telescopic cylinder 22 along its length. The outer wall of the inner telescopic cylinder 22 is integrally formed with an anti-rotation rod 24. The anti-rotation rod 24 is slidably disposed in the anti-rotation groove 23. The innermost telescopic cylinder 22 is... The innermost mounting box 1 is rotatably connected to the outermost telescopic cylinder 22, which is rotatably connected to the outermost mounting box 1. The upper end face of the innermost telescopic cylinder 22 is coaxially fixed with an active bevel gear 21, which is always meshed with the driven bevel gear 20. The side wall of the mounting box 1 away from the wall is provided with a through groove 25 that communicates with the internal cavity. The operator can put his hand into the mounting box 1 through the through groove 25 and rotate the telescopic cylinder 22, so that the active bevel gear 21 drives the driven bevel gear 20 to rotate, which in turn drives the pulley 15 to rotate, so that the limit frame 29 drives the wall detector 3 to reciprocate on the mounting plate 2.

[0050] Reference Figure 1 The mounting box 1 is equipped with a drive assembly for driving the telescopic cylinder 22 to rotate. The drive assembly includes a lifting motor 26 fixed inside the mounting box 1, and the lifting motor 26 is fixed to the lower end face of the outermost telescopic cylinder 22.

[0051] This application also discloses a detection method for a building wall detection device, including the following steps:

[0052] S1. Place the detection device on the front of the wall to be detected, so that the wall detector 3 is facing the wall, and always move the detection device in a direction parallel to the wall.

[0053] S2. When the device moves to the two ends near the corner of the wall, the lifting motor 26 drives the lifting cylinder 5 to rotate, the lifting cylinder 5 drives the driven bevel gear 20 to rotate, the driven bevel gear 20 drives the driving bevel gear 21 to rotate, the driving bevel gear 21 drives the pulley 15 and belt 16 to move, the connecting block 17 and connecting rod 18 on the belt 16 drive the limiting frame 29 to reciprocate on the mounting plate 2. When the wall detector 3 moves to both sides in the direction of movement of the mounting box 1, it is convenient for the wall detector 3 to detect the position near the corner of the wall.

[0054] S3. After the mounting box 1 is raised to a certain height in the vertical direction, repeat steps S1 and S2.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A building wall inspection device, characterized in that: The system includes several mounting boxes (1) that are connected together. The inner wall of the outer mounting box (1) has a positioning groove (31) along the height direction. The outer wall of the inner mounting box (1) is fixed with a positioning block. The positioning block is close to the upper end face of the mounting box (1). The positioning block is slidably disposed in the positioning groove (31) and drives the inner mounting box (1) to move upward during the sliding process. A wall detector (3) is installed on the side wall of the innermost mounting box (1). The mounting box (1) is provided with a lifting device that drives the inner mounting boxes (1) to move upward. The lifting device includes several lifting cylinders (5) that are connected together. The upper end face of the innermost lifting cylinder (5) is fixed to the innermost mounting box (1). The lower surface of the top plate of the box (1) is provided with the lifting device, which also includes a lifting mechanism disposed inside the lifting cylinder (5) and lifting the lifting cylinder (5); several of the mounting boxes (1) are open on the end face facing the wall, and several of the mounting boxes (1) located on the inner side are open on the lower end face. The innermost mounting box (1) is fixed with a mounting plate (2), which is vertically arranged and used to close the side wall of the several mounting boxes (1) that is open when they are in the retracted state. The wall detector (3) is disposed on the side wall of the mounting plate (2) facing the wall; two parallel and horizontally arranged limiting plates (12) are fixed on the mounting plate (2), and the limiting plates (12) are slidably arranged along the limiting plates. (12) A limiting frame (29) that reciprocates along its length, a vertically arranged support plate (13) is fixed on the limiting frame (29), a plurality of elastic clamps (14) are fixed on the support plate (13), the wall detector (3) is fixed between the plurality of elastic clamps (14), and a driving device for driving the limiting frame (29) to reciprocate is provided on the mounting box (1); the driving device includes two pulleys (15) rotatably connected to the mounting plate (2), the pulleys (15) are located between the two limiting plates (12), a belt (16) is provided on the pulleys (15) and surrounds the two pulleys (15), and a connecting block (1) is fixed on the outer wall of the pulleys (15). 7) A connecting groove (19) is provided on the limiting frame (29) along the vertical direction. A connecting rod (18) is fixed on the connecting block (17) and passes through the connecting groove (19) to drive the limiting frame (29) to reciprocate. The driving device also includes a driving mechanism for driving the pulley (15) to rotate. The shaft of one of the pulleys (15) extends into the mounting box (1). The driving mechanism includes a driven bevel gear (20) coaxially fixed on the shaft. A telescopic member is rotatably connected in the mounting box (1). An active bevel gear (21) that meshes with the driven bevel gear (20) is fixed on the telescopic member. A driving assembly for driving the telescopic member to rotate is provided in the mounting box (1).

2. The building wall inspection device according to claim 1, characterized in that: The lifting mechanism includes several threaded cylinders (6) connected together, each threaded cylinder (6) corresponding to a lifting cylinder (5). The inner wall of the outer lifting cylinder (5) is provided with a sliding groove (7) along its axial direction. The outer wall of the inner lifting cylinder (5) is fixed with a sliding rod (8) that is slidably disposed in the corresponding sliding groove (7). A stop block (27) is fixed on the inner wall of the upper end of the sliding groove (7). A stop groove (28) is provided on the sliding rod (8) along its length direction. The stop block (27) is slidably disposed in the stop groove (28) and prevents two adjacent lifting cylinders (5) from separating. A drive motor is fixed in the outermost lifting cylinder (5). The output shaft of the drive motor is fixed on the lower end face of the innermost threaded cylinder (6). The lifting mechanism also includes a lifting assembly that drives several threaded cylinders (6) to rotate synchronously and causes the corresponding lifting cylinder (5) to move upward.

3. The building wall inspection device according to claim 2, characterized in that: The outer wall of the inner threaded cylinder (6) is provided with a guide groove (9) along its axial direction. The lifting assembly includes a guide rod fixed to the inner wall of the outer threaded cylinder (6). The guide rod is slidably disposed in the corresponding guide groove (9). A threaded block (11) is fixed on the lower end face of the lifting cylinder (5). The threaded block (11) is sleeved on the adjacent threaded cylinder (6) and threadedly connected to the outer wall of the adjacent threaded cylinder (6). A contact cylinder (30) coaxial with the threaded cylinder (6) is fixed at the lower end of the threaded cylinder (6). The contact cylinder (30) abuts against the upper end face of the corresponding threaded block (11) and pushes the contact block to drive the inner threaded cylinder (6) to move upward when the threaded cylinder (6) moves upward.

4. The building wall detection device according to claim 1, characterized in that: The telescopic component includes several telescopic cylinders (22) that are connected together. The inner wall of the telescopic cylinder (22) located on the outer side is provided with an anti-rotation groove (23) along the axial direction. The outer wall of the telescopic cylinder (22) located on the inner side is fixed with an anti-rotation rod (24) that is slidably disposed in the anti-rotation groove (23). The telescopic cylinder (22) located on the innermost side is rotatably connected to the innermost mounting box (1). The telescopic cylinder (22) located on the outermost side is rotatably connected to the outermost mounting box (1). The active bevel gear (21) is fixed on the upper end face of the innermost telescopic cylinder (22).

5. A building wall inspection device according to claim 4, characterized in that: The mounting box (1) has a through groove (25) on the side wall away from the wall that communicates with the internal cavity and facilitates manual rotation of the telescopic cylinder (22).

6. A detection method using a building wall detection device as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Place the device in front of the wall to be detected, so that the wall detector (3) is facing the wall, and always move the device in a direction parallel to the wall. S2. When the device moves to the two ends near the corner of the wall, the wall detector (3) moves to both sides in the direction of the installation box (1) so that the wall detector (3) can detect the position near the corner of the wall. S3. After the mounting box (1) is raised to a certain height in the vertical direction, repeat steps S1 and S2.

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