A thickness detection device for a building wall

Abstract

The application provides a kind of thickness detection device of building wall.The thickness detection device of building wall includes fixed back plate, fixed slide rod, connecting plate, measuring scale and movable back plate, measuring scale and fixed slide rod are fixedly installed between fixed back plate and connecting plate, movable back plate is slidably sleeved on fixed slide rod, measuring scale penetrates movable back plate and is slidably connected with movable back plate, a plurality of adjusting screws are threadedly installed on fixed back plate and movable back plate, one end of a plurality of adjusting screws is fixedly installed with contact sheet, protruding part is integrally formed on fixed back plate and movable back plate, slide column is penetrates and movably installed on two protruding parts, and one end of two slide columns close to each other is fixedly installed with alignment plate.The thickness detection device of building wall provided by the application has the advantages of no need to clean or polish both sides of wall during measurement, reducing the time required for measurement and measurement error is small, and operation is convenient.

Description

Technical Field

[0001] This invention relates to the field of building measurement technology, and in particular to a device for detecting the thickness of building walls. Background Technology

[0002] When building a wall, in order to ensure the load-bearing capacity and stability of the wall, it is necessary to calculate its thickness ratio. Therefore, the thickness of the building wall needs to be tested. During the wall construction process, some cement will inevitably be squeezed out between the bricks. After a period of curing, this squeezed cement will become relatively hard and protrude from both sides of the wall. In addition, there may also be protrusions on the bricks used.

[0003] However, existing wall thickness measurement devices cannot avoid protruding parts of the aforementioned cement blocks or bricks. To ensure measurement accuracy, both sides of the wall need to be cleaned and polished, which makes the entire measurement process time-consuming and troublesome.

[0004] When testing the thickness of a completed building wall, cement may be squeezed out between the bricks.

[0005] Therefore, it is necessary to provide a thickness detection device for building walls to solve the above-mentioned technical problems. Summary of the Invention

[0006] The technical problem solved by this invention is to provide a building wall thickness detection device that eliminates the need for cleaning or grinding on both sides of the wall during measurement, reduces the measurement time and measurement error, and is easy to operate.

[0007] To solve the above-mentioned technical problems, the present invention provides a wall thickness detection device, comprising: a fixed backing plate, a fixed sliding rod, a connecting plate, a measuring ruler, and a movable backing plate. The measuring ruler and the fixed sliding rod are both fixedly installed between the fixed backing plate and the connecting plate. The movable backing plate is slidably sleeved on the fixed sliding rod. The measuring ruler passes through the movable backing plate and is slidably connected to it. Multiple adjusting screws are threadedly installed on both the fixed backing plate and the movable backing plate. A contact piece is fixedly installed at one end of each of the multiple adjusting screws. A protrusion is integrally formed on both the fixed backing plate and the movable backing plate. A sliding column is movably installed through and on each of the two protrusions. An alignment plate is fixedly installed at the end of each of the two sliding columns that are close to each other. An end plate is fixedly installed at the end of each of the two sliding columns that are far apart from each other. A square rod is fixedly installed on the connecting plate. A handle is integrally formed on the square rod. The end of the handle that is far away from the square rod is fixedly connected to the fixed backing plate.

[0008] Preferably, each of the two sliding pillars has a first insertion hole and a second insertion hole on its outer wall. Each of the two protrusions has a locking pin slidably mounted on its end away from the fixed sliding rod. Each of the two locking pins extends into the corresponding first insertion hole at its end near the fixed sliding rod. Each of the two locking pins has an end block fixedly mounted on its end away from the fixed sliding rod. Each of the two locking pins has a first retaining spring sleeved on it. One end of each of the two first retaining springs is fixedly connected to the corresponding protrusion, and the other end is fixedly connected to the corresponding end block.

[0009] Preferably, a pull ring is fixedly installed on the outer wall of the end block on the side away from the locking pin.

[0010] Preferably, a return spring is fitted on the fixed slide rod, one end of which is fixedly connected to the connecting plate and the other end is fixedly connected to the movable backing plate. Both the square rod and the connecting plate are rotatably mounted with pulleys, and multiple pulleys are wound with the same pull rope. A sliding seat is slidably mounted on the outer wall of the square rod away from the fixed slide rod. One end of the pull rope is fixedly connected to the movable backing plate and the other end is fixedly connected to the sliding seat. A hook is fixedly mounted on the top of the sliding seat.

[0011] Preferably, the connecting plate has a clearance sliding hole, the pulling rope passes through the clearance sliding hole and is movably connected to the inner wall of the clearance sliding hole.

[0012] Preferably, a fixing frame is fixedly installed on both the connecting plate and the square rod, the pulley is rotatably installed on the inner walls of both sides of the fixing frame, a limiting ring is integrally formed on the fixing frame, the pulling rope passes through the limiting ring and is movably connected to the inner wall of the limiting ring.

[0013] Preferably, two slide rails are symmetrically formed on the outer wall of the fixed slide rod, and anti-slip pads are fixedly installed in both slide rails. A stop ring is slidably sleeved on the fixed slide rod, and two receiving slide grooves are symmetrically formed on the inner wall of the stop ring. Abutting sliders are slidably installed in both receiving slide grooves. The sides of the two abutting sliders that are close to each other extend into the corresponding slide rails and are slidably connected to the inner walls of the corresponding slide rails. Two connecting slide rods are slidably installed on the stop ring. The ends of the two connecting slide rods that are close to each other extend into the corresponding receiving slide grooves and are fixedly connected to the corresponding abutting sliders. An operating finger is fixedly installed at the ends of the two connecting slide rods that are far apart from each other. A second retaining spring is sleeved on each of the two connecting slide rods. The ends of the two second retaining springs that are close to each other are fixedly connected to the stop ring, and the ends of the two second retaining springs that are far apart from each other are fixedly connected to the corresponding operating finger.

[0014] Preferably, two symmetrically formed smooth holes are provided on the outer wall of the stop ring. The two smooth holes are respectively connected to the two receiving grooves. The two connecting slide rods pass through the corresponding smooth holes and are slidably connected to the inner wall of the corresponding smooth holes.

[0015] Preferably, multiple protrusions are formed on the outer wall of the side where the two abutting sliders are close to each other.

[0016] Preferably, the end of the stop ring near the connecting plate is integrally formed with a contact ring plate.

[0017] Compared with related technologies, the thickness detection device for building walls provided by the present invention has the following advantages: ① By setting multiple adjusting screws, multiple contact pieces, sliding columns, alignment plates, end plates, and other components on the fixed and movable back plates, during use, some corresponding contact pieces can be adjusted backward to avoid the cement blocks or other obvious protrusions on both sides of the wall to be measured. Other contact pieces on the fixed and movable back plates that do not need to be avoided form two contact surfaces, which fully contact the two sides of the wall. Then, the thickness of the wall can be measured by simple calculation based on the reading on the measuring ruler of the movable back plate. It has the advantages of not needing to clean or grind the two sides of the wall during measurement, reducing the measurement time, and having small measurement error. ② By using components such as a reset spring, pulley, pull rope, sliding seat, and hook, when measuring thickness, after adjusting the position of each contact piece, hold the handle with your right hand, then hook the hook with your right thumb and pull it towards the handle. This will cause the movable back plate to separate from the fixed back plate. Then, the movable back plate and the fixed back plate are respectively locked on both sides of the wall. Next, first, make the multiple contact pieces on the fixed back plate that do not need to be avoided contact with one side of the wall, and then slowly release the hook. The movable back plate will automatically move towards the wall, so that the multiple contact pieces on it that do not need to be avoided automatically fit with the other side of the wall. The wall thickness measurement can be completed by one-handed operation, improving the convenience of using the device. ③ By setting up components such as a slide, anti-slip pad, stop ring, receiving slide groove, contact slider, connecting slide rod, operating finger rod, and second holding spring, when performing wall thickness measurement, after the movable backing plate has reached its position, the stop ring can be used to abut the movable backing plate to prevent it from resetting. Relevant personnel do not need to take the reading immediately. They can move the device off the wall and place it on a platform or table before taking the reading and calculating the thickness, which further improves the ease of use of the device. Attached Figure Description

[0018] Figure 1 A schematic diagram of the first embodiment of the building wall thickness detection device provided by the present invention; Figure 2 for Figure 1 An exploded view of the sliding pin, locking pin, and first retaining spring shown. Figure 3 This is a schematic diagram of the structure of the first embodiment of the wall thickness detection device provided by the present invention, in which the two alignment plates are in a vertical state. Figure 4 A schematic diagram of the second embodiment of the building wall thickness detection device provided by the present invention; Figure 5 for Figure 4 An enlarged schematic diagram of part A shown; Figure 6 for Figure 4 The diagram shows the structure of one of the mounting brackets; Figure 7 A schematic diagram of the third embodiment of the thickness detection device for building walls provided by the present invention; Figure 8 for Figure 7 An enlarged schematic diagram of Department B is shown below; Figure 9 for Figure 7 The diagram shows a cross-sectional view of the gear ring.

[0019] The following are the labeling elements in the diagram: 1. Fixed backplate; 2. Fixed slide rod; 3. Connecting plate; 4. Square rod; 5. Handle; 6. Measuring ruler; 7. Movable backplate; 8. Adjusting screw; 9. Contact piece; 10. Slide column; 11. Alignment plate; 12. End plate; 13. First insertion hole; 14. Second insertion hole; 15. Locking pin; 16. First retaining spring; 17. Return spring; 18. Pulley; 19. Pull rope; 20. Sliding seat; 21. Hook; 22. Fixing frame; 23. Restricting ring; 24. Slide track; 25. Anti-slip pad; 26. Stop ring; 27. Receiving slide groove; 28. Abutting slider; 29. ​​Connecting slide rod; 30. Operating finger rod; 31. Second retaining spring. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] First embodiment: Please refer to the following: Figures 1-3In the first embodiment of the present invention, the wall thickness detection device includes: a fixed support plate 1, a fixed slide rod 2, a connecting plate 3, a measuring ruler 6, and a movable support plate 7. The measuring ruler 6 and the fixed slide rod 2 are both fixedly installed between the fixed support plate 1 and the connecting plate 3. The movable support plate 7 has a sliding hole that matches the diameter of the fixed slide rod 2, through which it is slidably fitted onto the fixed slide rod 2. The movable support plate 7 has a square hole that matches the measuring ruler 6, through which the measuring ruler 6 passes and is slidably connected to the inner wall of the square hole. The outer wall of the fixed support plate 1 near the connecting plate 3 coincides with the zero mark of the measuring ruler 6. Both the fixed support plate 1 and the movable support plate 7 have multiple inner marks arranged in a rectangular array. Each threaded hole contains multiple adjusting screws 8, one end of which is fixedly fitted with a contact piece 9. A knob is fixedly fitted to the end of each adjusting screw 8 furthest from the contact piece 9. The outer ring of the knob has several raised grooves. Both the fixed plate 1 and the movable plate 7 have integrally formed protrusions, each with a round hole through which a sliding column 10 is movably installed. Alignment plates 11 are fixedly fitted to the ends of the two sliding columns 10 closest to each other, and end plates 12 are fixedly fitted to the ends of the two sliding columns 10 furthest from each other. A knob is also fixedly fitted to the outer wall of the end plate 12 on the side furthest from the sliding column 10. A square rod 4 is fixedly fitted to the connecting plate 3. A handle 5 is integrally formed on the rod 4. The end of the handle 5 away from the square rod 4 is fixedly connected to the fixed backing plate 1. When measuring the thickness of the wall, the first step is to select the wall position to be measured. Based on the position of the cement blocks protruding from the two sides of the wall at the measurement position, the corresponding contact pieces 9 on the fixed backing plate 1 and the movable backing plate 7 are adjusted backward. During adjustment, the corresponding adjusting screw 8 is turned counterclockwise. Then, the two alignment plates 11 are kept at the maximum distance from the movable backing plate 7 or the fixed backing plate 1, and the sliding column 10 is rotated to make the alignment plates 11 horizontal. Then, the other contact pieces 9 that do not need to be avoided are adjusted to contact the alignment plates 11. In this way, except for avoiding In addition to the contact piece 9, all the contact pieces 9 on the fixed back plate 1 that do not need to be avoided on the side of the outer wall away from the corresponding adjusting screw 8 form a contact surface. All the contact pieces 9 on the movable back plate 7 that do not need to be avoided on the side of the outer wall away from the corresponding adjusting screw 8 also form a contact surface. The two contact surfaces are respectively attached to the two sides of the wall. Thus, the distance between the two contact surfaces is the thickness of the wall. When calculating, let S be the scale value on the measuring ruler 6 corresponding to the side of the movable back plate 7 that is closer to the fixed back plate 1, T be the distance between the movable back plate 7 or the fixed back plate 1 and the corresponding contact surface, and W be the thickness of the wall. Then W = S - 2T, where T can be designed as an integer value during manufacturing for easy calculation.

[0022] In order to lock the two alignment plates 11 and ensure that they are reliably in a horizontal or vertical state, in this embodiment, the outer walls of the two sliding pillars 10 are provided with a first insertion hole 13 and a second insertion hole 14. When the alignment plate 11 is placed horizontally, the first insertion hole 13 is in a vertical state and the second insertion hole 14 is in a horizontal state. The ends of the two protrusions away from the fixed sliding rod 2 are slidably fitted with locking pins 15. The ends of the two locking pins 15 near the fixed sliding rod 2 extend into the corresponding first insertion hole 13. The ends of the two locking pins 15 away from the fixed sliding rod 2 are fixedly fitted with end blocks. The two locking pins 15 are fitted with first retaining springs 16. One end of the two first retaining springs 16 is fixedly connected to the corresponding protrusion, and the other end is fixedly connected to the corresponding end block. In order to facilitate pulling the locking pins 15, a pull ring is fixedly installed on the outer wall of the end block away from the locking pins 15.

[0023] In this embodiment: In the initial state, both alignment plates 11 are vertical, and both locking pins 15 are engaged in the corresponding second holes 14. During use, first select a measurement position on the completed wall. Then, based on the positions of the protruding cement blocks on both sides of the measured position, or the obvious protrusions on the bricks, adjust the corresponding contact pieces 9 on the fixed plate 1 and movable plate 7 backward to avoid obstruction. Next, pull the locking pins 15 on the fixed plate 1 to the right to release the restriction on the sliding column 10. Then push the sliding column 10 until one end... The end plate 12 is attached to the fixed backing plate 1. Then, the sliding column 10 is rotated 90 degrees. At this time, the alignment plate 11 is in a horizontal state, the first insertion hole 13 is also in a horizontal state, and it is aligned with the locking pin 15. After the locking pin 15 is released, under the tension of the first retaining spring 16, the locking pin 15 will automatically insert into the first insertion hole 13, thereby locking the alignment plate 11. Then, the alignment plate 11 on the movable backing plate 7 is adjusted in the same way as the alignment plate 11 on the fixed backing plate 1, which will not be described in detail here. After completing the above operations, adjust the contact pieces 9 that do not need to be avoided until they are in contact with the corresponding alignment plate 11. Then, adjust the two alignment plates 11 to a vertical position and lock them in place (i.e., re-lock the locking pin 15 into the second insertion hole 14 of the sliding column 10). In this way, except for the contact pieces 9 that need to be avoided, all the contact pieces 9 on the fixed back plate 1 that do not need to be avoided form a contact surface on the outer wall away from the corresponding adjusting screw 8. All the contact pieces 9 on the movable back plate 7 that do not need to be avoided also form a contact surface on the outer wall away from the corresponding adjusting screw 8. During measurement, first, place the fixed back plate 1 and the movable back plate 7 on both sides of the wall to be measured. Then, first, align the multiple contact pieces 9 on the fixed back plate 1 that do not need to be avoided with one side of the wall. Then, move the movable back plate 7 until the multiple contact pieces 9 on it that do not need to be avoided are aligned with the other side of the wall. The two contact surfaces are respectively attached to the two sides of the wall. Then, the specific distance between the two contact surfaces can be measured.

[0024] Compared with related technologies, the thickness detection device for building walls provided by the present invention has the following advantages: By setting multiple adjusting screws 8, multiple contact pieces 9, sliding columns 10, alignment plates 11, end plates 12, and other components on the fixed back plate 1 and the movable back plate 7, during use, some corresponding contact pieces 9 can be adjusted backward to avoid protruding cement blocks or other obvious protrusions on both sides of the wall to be measured. Other contact pieces 9 on the fixed back plate 1 and the movable back plate 7 that do not need to be avoided form two contact surfaces, which fully contact the two sides of the wall. Then, the thickness of the wall can be measured by simple calculation based on the reading on the measuring ruler 6 on the movable back plate 7. It has the advantages of not needing to clean the two sides of the wall during measurement, reducing the measurement time, and having small measurement errors.

[0025] Second embodiment: Based on the wall thickness detection device provided in the first embodiment of this application, the second embodiment of this application proposes another wall thickness detection device. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0026] The second embodiment of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Please refer to the following: Figures 4-6The wall thickness detection device also includes a return spring 17 sleeved on the fixed slide rod 2. One end of the return spring 17 is fixedly connected to the connecting plate 3, and the other end is fixedly connected to the movable support plate 7. Pulleys 18 are rotatably mounted on both the square rod 4 and the connecting plate 3. Specifically, a fixing frame 22 is fixedly mounted on both the connecting plate 3 and the square rod 4. The pulleys 18 are rotatably mounted on the inner walls of both sides of the fixing frame 22. Multiple pulleys 18 are wound with the same pulling rope 19. A sliding pulley is slidably mounted on the outer wall of the square rod 4 away from the fixed slide rod 2. The movable seat 20 has a sliding hole on the connecting plate 3. One end of the pull rope 19 passes through the sliding hole and is fixedly connected to the movable backing plate 7. The pull rope 19 moves with the inner wall of the sliding hole. The other end of the pull rope is fixedly connected to the sliding seat 20. A hook ring 21 is fixedly installed on the top of the sliding seat 20. In order to restrict the pull rope 19 and prevent it from slipping off the pulley 18, a limiting ring 23 is integrally formed on the fixed frame 22. The pull rope 19 passes through the limiting ring 23 and is movably connected to the inner wall of the limiting ring 23.

[0028] In this embodiment: When measuring the thickness of a wall, after adjusting the position of each contact piece 9, hold the handle 5 with your right hand, hook the hook ring 21 with your right thumb, and pull it towards the handle 5. The hook ring 21 drives the sliding seat 20 to move, and the sliding seat 20 pulls the pull rope 19. Under the pull of the pull rope 19, the movable back plate 7 will be pulled away from the fixed back plate 1. During this process, the return spring 17 will be compressed. Then, the movable back plate 7 and the fixed back plate 1 are respectively locked on both sides of the wall. First, the multiple contact pieces 9 on the fixed back plate 1 that do not need to be avoided are brought into contact with one side of the wall. Then, slowly release the hook ring 21. Under the pressure of the return spring 17, the movable back plate 7 will automatically move towards the wall, so that the multiple contact pieces 9 on it that do not need to be avoided are automatically attached to the other side of the wall. With the above settings, when measuring the thickness, after adjusting the position of each contact piece 9, the wall thickness measurement can be completed by one-handed operation, improving the convenience of using the device.

[0029] Please refer to the following: Figures 7-9In this embodiment, two slide rails 24 are symmetrically formed on the outer wall of the fixed slide rod 2. Rubber anti-slip pads 25 are fixedly installed in each of the two slide rails 24. A stop ring 26 is slidably sleeved on the fixed slide rod 2. Two receiving grooves 27 are symmetrically formed on the inner wall of the stop ring 26. Abutment sliders 28 are slidably installed in each of the two receiving grooves 27. In the initial state, the two abutment sliders 28 are in contact with the corresponding anti-slip pads 25 to fix the position of the stop ring 26. The sides of the two abutment sliders 28 that are close to each other extend into the corresponding slide rail 24 and are slidably connected to the inner walls of both sides of the corresponding slide rail 24. Two connecting slide rods 29 are slidably installed on the stop ring 26. Specifically, the stop... Two symmetrically formed smooth holes are provided on the outer wall of the positioning ring 26. The two smooth holes are respectively connected to two receiving grooves 27. The two connecting rods 29 pass through the corresponding smooth holes and are slidably connected to the inner wall of the corresponding smooth holes. The ends of the two connecting rods 29 that are close to each other extend into the corresponding receiving grooves 27 and are fixedly connected to the corresponding abutting sliders 28. The ends of the two connecting rods 29 that are far apart from each other are fixedly installed with operating fingers 30. The two connecting rods 29 are each fitted with a second retaining spring 31. The ends of the two second retaining springs 31 that are close to each other are fixedly connected to the positioning ring 26, and the ends of the two second retaining springs 31 that are far apart from each other are fixedly connected to the corresponding operating fingers 30.

[0030] In this embodiment, in order to increase the tightness between the two contact sliders 28 and the corresponding anti-slip pads 25, multiple protrusions are provided on the outer wall of the side of the two contact sliders 28 that are close to each other.

[0031] In this embodiment, in order to increase the contact area with the movable backing plate 7, a contact ring plate is integrally formed at one end of the stop ring 26 near the connecting plate 3.

[0032] In this embodiment, when measuring the thickness of the wall, after the multiple contact pieces 9 on the movable backing plate 7 that do not need to be avoided come into contact with the other side of the wall, the user can use the index finger and thumb of the other hand to spread the two operating finger rods 30 to the sides. The two operating finger rods 30 drive the corresponding abutment sliders 28 to move through the corresponding connecting slide rods 29, so that the two abutment sliders 28 move in opposite directions, thereby separating from the corresponding anti-slip pads 25. Then, the stop ring 26 is moved towards the movable backing plate 7 until the contact ring plate on the stop ring 26 is reached. When the device contacts the movable backrest 7, and then the two operating levers 30 are released, the two operating levers 30 will return to their original position under the tension of the two second retaining springs 31. This will eventually cause the two abutting sliders 28 to re-engage with the corresponding anti-slip pads 25, thereby fixing the position of the stop ring 26. In this way, the stop ring 26 can prevent the movable backrest 7 from resetting. The relevant personnel do not need to take readings immediately. They can move the device from the wall and place it on a platform or table before taking readings and calculating the thickness, which further improves the ease of use of the device.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A thickness detection device for building walls, comprising a fixed backing plate (1), a fixed sliding rod (2), a connecting plate (3), a measuring ruler (6), and a movable backing plate (7), wherein the measuring ruler (6) and the fixed sliding rod (2) are both fixedly installed between the fixed backing plate (1) and the connecting plate (3), the movable backing plate (7) is slidably sleeved on the fixed sliding rod (2), and the measuring ruler (6) passes through the movable backing plate (7) and is slidably connected to the movable backing plate (7), characterized in that, Multiple adjusting screws (8) are threaded onto both the fixed back plate (1) and the movable back plate (7). A contact piece (9) is fixedly installed at one end of each adjusting screw (8). Both the fixed back plate (1) and the movable back plate (7) are integrally formed with protrusions. A sliding column (10) is movably installed through each of the two protrusions. An alignment plate (11) is fixedly installed at the end of the two sliding columns (10) that are close to each other. An end plate (12) is fixedly installed at the end of the two sliding columns (10) that are far apart from each other. Rotating the sliding column (10) makes the alignment plate (11) horizontal. Other contact pieces (9) that do not need to be avoided are adjusted to contact the alignment plate (11). A square rod (4) is fixedly installed on the connecting plate (3). A handle (5) is integrally formed on the square rod (4). The end of the handle (5) that is far away from the square rod (4) is fixedly connected to the fixed back plate (1).

2. The thickness detection device for building walls according to claim 1, characterized in that, The outer walls of the two sliding columns (10) are provided with a first insertion hole (13) and a second insertion hole (14). The ends of the two protrusions away from the fixed sliding rod (2) are slidably fitted with locking pins (15). The ends of the two locking pins (15) near the fixed sliding rod (2) extend into the corresponding first insertion hole (13). The ends of the two locking pins (15) away from the fixed sliding rod (2) are fixedly fitted with end blocks. The two locking pins (15) are fitted with first retaining springs (16). One end of the two first retaining springs (16) is fixedly connected to the corresponding protrusion, and the other end is fixedly connected to the corresponding end block.

3. The thickness detection device for building walls according to claim 2, characterized in that, A pull ring is fixedly installed on the outer wall of the end block on the side away from the locking pin (15).

4. The thickness detection device for building walls according to claim 1 or 3, characterized in that, A return spring (17) is fitted on the fixed slide rod (2). One end of the return spring (17) is fixedly connected to the connecting plate (3), and the other end is fixedly connected to the movable backing plate (7). Both the square rod (4) and the connecting plate (3) are rotatably mounted with pulleys (18). Multiple pulleys (18) are wound with the same pulling rope (19). A sliding seat (20) is slidably mounted on the outer wall of the square rod (4) away from the fixed slide rod (2). One end of the pulling rope (19) is fixedly connected to the movable backing plate (7), and the other end is fixedly connected to the sliding seat (20). A hook (21) is fixedly mounted on the top of the sliding seat (20).

5. The thickness detection device for building walls according to claim 4, characterized in that, The connecting plate (3) has a clearance sliding hole, and the pulling rope (19) passes through the clearance sliding hole and is movably connected to the inner wall of the clearance sliding hole.

6. The thickness detection device for building walls according to claim 4, characterized in that, A fixing frame (22) is fixedly installed on both the connecting plate (3) and the square rod (4). The pulley (18) is rotatably installed on the inner walls of both sides of the fixing frame (22). A limiting ring (23) is integrally formed on the fixing frame (22). The pulling rope (19) passes through the limiting ring (23) and is movably connected to the inner wall of the limiting ring (23).

7. The thickness detection device for building walls according to claim 1, characterized in that, Two slide rails (24) are symmetrically opened on the outer wall of the fixed slide rod (2). Anti-slip pads (25) are fixedly installed in both slide rails (24). A stop ring (26) is slidably sleeved on the fixed slide rod (2). Two receiving grooves (27) are symmetrically opened on the inner wall of the stop ring (26). Abutment sliders (28) are slidably installed in both receiving grooves (27). The sides of the two abutment sliders (28) that are close to each other extend into the corresponding slide rails (24) and are slidably connected to the inner walls of the corresponding slide rails (24). A stop ring (26) is slidably installed with Two connecting slide rods (29) are provided. The ends of the two connecting slide rods (29) that are close to each other extend into the corresponding receiving slide groove (27) and are fixedly connected to the corresponding abutting slider (28). The ends of the two connecting slide rods (29) that are far apart from each other are fixedly installed with operating fingers (30). The two connecting slide rods (29) are each fitted with a second retaining spring (31). The ends of the two second retaining springs (31) that are close to each other are fixedly connected to the stop ring (26), and the ends of the two second retaining springs (31) that are far apart from each other are fixedly connected to the corresponding operating fingers (30).

8. The thickness detection device for building walls according to claim 7, characterized in that, Two smooth holes are symmetrically opened on the outer wall of the stop ring (26). The two smooth holes are respectively connected to the two receiving grooves (27). The two connecting rods (29) pass through the corresponding smooth holes and are slidably connected to the inner wall of the corresponding smooth holes.

9. The thickness detection device for building walls according to claim 7, characterized in that, Multiple protrusions are provided on the outer wall of the side where the two abutting sliders (28) are close to each other.

10. The thickness detection device for building walls according to claim 7, characterized in that, The stop ring (26) has a contact ring plate integrally formed at one end near the connecting plate (3).

Images