A verticality detection device for construction engineering quality detection

Abstract

The utility model discloses a perpendicularity detection device for construction engineering quality detection belongs to construction engineering technical field, including perpendicularity detection ruler assembly, including bubble level and detachable vertical ruler board, detachable vertical sub -board, and detachably vertical ruler board is installed in detachable vertical ruler board in the movable mode, and one end of detachable vertical ruler board is inserted into bubble level and can be in bubble level along the axis of bubble level and adjust position, and detachable vertical sub -board and bubble level are perpendicular to each other, and the both ends of bubble level are integrally connected with the expansion installation recess for installing detachable vertical ruler board, and the top surface of two expansion installation recesss is all annular array equidistance and is provided with a plurality of adjusting screw holes, and detachable vertical ruler board is hinged in expansion installation recess through the pin shaft, the utility model reaches the double detection effect of both detecting internal angle perpendicularity and verifying the perpendicularity of outer wall in reverse.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology, and in particular, it is a verticality detection device for quality inspection of building engineering. Background Technology

[0002] Building construction quality inspection is a crucial step in ensuring the safety and durability of buildings, with wall verticality inspection being particularly important. Traditional wall verticality inspection typically relies on simple tools such as right-angle rulers or laser rangefinders. While these methods can meet basic needs to some extent, they often fall short when dealing with complex structures such as T-shaped walls, rectangular columns, and L-shaped walls. Especially when precise measurements of both the inner and outer walls are required simultaneously, traditional tools are cumbersome and inefficient.

[0003] In the current field of building construction quality inspection, although various verticality testing tools are widely used, such as traditional straightedges, laser vertical gauges, and simple angle rulers, these devices have revealed many deep-seated technical defects in practical applications. These defects affect the efficiency and accuracy of testing. For example, existing testing tools can generally only be used to test the verticality of the wall's inner angle (i.e., "inner angle testing"). However, they lack effective two-way clamping measurement capabilities for the verticality of convex corners of walls or the outer walls of independent columns. Furthermore, relying solely on the verticality of the inner angle cannot determine whether the wall is vertical as a whole, and situations where the "inner straightness and outer slant" may go undetected. For instance, if a T-shaped wall is vertical inside but slanted outside, it will affect the bonding strength of the exterior wall decoration layer, potentially leading to problems such as tile detachment in the long term. Utility Model Content

[0004] The purpose of this invention is to provide a verticality testing device for quality inspection of building engineering projects, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a verticality detection device for quality inspection of building engineering, comprising: A verticality measuring ruler assembly, including a bubble level and a detachable vertical ruler plate movably mounted on at least one end of the bubble level; A detachable vertical subplate is movably installed in a detachable vertical ruler plate, and one end of the detachable vertical ruler plate is inserted into a bubble level and can be adjusted in the bubble level. The detachable vertical subplate and the bubble level are perpendicular to each other. The bubble level has integrally connected extended mounting grooves at both ends for installing a detachable vertical ruler plate. Multiple adjusting screw holes are equidistantly arranged in a circular array on the top surface of each of the two extended mounting grooves. The detachable vertical ruler plate is hinged in the extended mounting groove via a pin, and is connected to one of the adjusting screw holes via a locking bolt, ensuring that the detachable vertical ruler plate and the bubble level are perpendicular to each other. When the verticality measuring assembly inspects T-shaped walls and rectangular columns at the construction site, it first inspects the verticality between the inner walls of the T-shaped wall. Subsequently, the detachable vertical sub-plate is detached from the detachable vertical ruler plate and connected to the bubble level to inspect the verticality of the outer wall of the T-shaped wall.

[0006] In this preferred embodiment, the bubble level has multiple bubble tubes with different installation directions embedded inside, and a handle is installed on one side of the outer wall of the bubble level.

[0007] In this preferred embodiment, each of the extended mounting grooves has a pin hole on its outer wall located in the middle of the half-circle adjusting screw hole for mounting the pin shaft, and both the adjusting screw hole and the pin hole penetrate the end of the bubble level.

[0008] In a preferred embodiment of this design, the outer wall of the detachable vertical ruler plate has an installation recess for the detachable vertical sub-plate to be fitted together, and the installation recess is dynamically locked together with the detachable vertical sub-plate by a fastener.

[0009] In a preferred embodiment, the inner wall of the mounting recess is symmetrically embedded with a plurality of first permanent magnets, and the inner wall of the detachable vertical sub-plate is symmetrically embedded with a plurality of magnetic pieces that magnetically attract the first permanent magnets.

[0010] In a preferred embodiment of this scheme, the T-shaped wall comprises a first wall and a second wall connected together. When the verticality of the inner wall of the T-shaped wall is tested, the detachable vertical ruler is flipped and adjusted in direction (as shown in the attached figures), so that the bubble level and the detachable vertical ruler are still perpendicular to each other and back to back against the inner walls of the first and second walls.

[0011] In this preferred embodiment, when the verticality of the outer wall of the T-shaped wall is being tested, the detachable vertical ruler plate, the detachable vertical sub-plate, and the bubble level are clamped together on the outer wall of the second wall.

[0012] In this preferred embodiment, the bubble level is provided with a travel groove on the side away from the handle, allowing the detachable vertical subplate to slide and adjust its position.

[0013] In a preferred embodiment, a slider snap-fit ​​box for positioning and inserting a detachable vertical subplate is slidably installed in the inner cavity of the travel groove, and the slider snap-fit ​​box makes sliding frictional contact with the travel groove.

[0014] In a preferred embodiment of this design, a second permanent magnet is embedded within the fixed sliding block housing, and the second permanent magnet magnetically engages with a magnet sheet fixed to the inner wall of the travel groove.

[0015] Compared with the prior art, the technical effects and advantages of this utility model are as follows: This verticality testing device for building construction quality inspection features extended mounting grooves with multiple annularly distributed adjustment screw holes at both ends of a bubble level. A hinged vertical ruler plate, secured with pins and locking bolts, allows for multi-angle rotation and precise positioning of the detachable vertical ruler plate at different angles. The principle lies in adjusting the angle between the detachable vertical ruler plate and the bubble level by changing the position of the adjustment screw holes connected to the locking bolts. This achieves flexible and adjustable testing angles, adapting to different wall angles (such as a 90° standard right angle or an inclined wall), significantly improving the device's versatility and applicability.

[0016] By designing the detachable vertical subplate as a modular structure that can be removed from the mounting recess on the detachable vertical ruler plate and directly inserted into the travel groove at the other end of the bubble level, the device can freely switch between the "L-shaped main ruler structure" and the "three-sided clamping detection structure" according to the testing requirements. Its principle lies in using a combination of detachable and sliding adjustment to achieve the function of clamping measurement on the outer wall, achieving a dual detection effect that can both detect the verticality of the inner corner and verify the verticality of the outer wall in reverse. This effectively solves the technical problem that traditional measuring rulers can only detect in one direction and cannot assess the overall vertical consistency of the wall.

[0017] By setting a slider snap-fit ​​box in the stroke groove and combining the magnetic attraction between the second permanent magnet and the magnetic sheet on the groove wall, the detachable vertical subplate has the ability to position and self-lock during the sliding adjustment process. The principle is to use magnetic force to provide appropriate frictional resistance and automatically attract and fix it after it is in place, thereby realizing the stable positioning function of the sliding part. This achieves the effect of preventing position displacement caused by vibration or gravity during the detection process, and improves the repeatability and ease of operation of the measurement. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the installation state structure of the detachable vertical sub-plate of this utility model. Figure 3 This is a schematic diagram of the external structure of the T-shaped wall of this utility model; Figure 4 This is a schematic diagram of the internal structure of the T-shaped wall of this utility model; Figure 5 This is a schematic diagram of the verticality measuring ruler assembly for internal measurement of a T-shaped wall according to this utility model; Figure 6 This is a schematic diagram of the disassembly structure of the detachable vertical subplate of this utility model. Figure 7 This is a schematic diagram showing the disassembled structure of the slider clip box and the second permanent magnet of this utility model; Figure 8 This is a schematic diagram of the verticality detection structure of the rectangular wall column of this utility model. Figure 9 This is a schematic diagram of the verticality detection structure of the L-shaped wall of this utility model.

[0020] Explanation of reference numerals in the attached figures: In the diagram: 1. Verticality measuring ruler assembly; 2. Bubble level; 3. Detachable vertical ruler plate; 4. Bubble tube; 5. Handle; 6. Extended mounting groove; 7. Adjusting screw hole; 8. Pin hole; 9. Detachable vertical sub-plate; 10. Mounting groove; 11. First permanent magnet; 12. Pin shaft; 13. Locking bolt; 14. First wall; 15. Second wall; 16. T-shaped wall; 17. Stroke groove; 18. Slider clip box; 19. Second permanent magnet; 20. Rectangular wall column; 21. L-shaped wall. Detailed Implementation

[0021] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0022] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0023] This embodiment provides, for example Figures 1 to 9The verticality testing device shown includes: a verticality testing ruler assembly 1 and a detachable vertical subplate 9.

[0024] The verticality measuring ruler assembly 1 includes a bubble level 2 and a detachable vertical ruler plate 3 movably installed at least one end of the bubble level 2; a detachable vertical sub-plate 9 is movably installed in the detachable vertical ruler plate 3, and one end of the detachable vertical ruler plate 3 is inserted into the bubble level 2 and can be adjusted in the bubble level 2. The detachable vertical sub-plate 9 and the bubble level 2 are perpendicular to each other.

[0025] In this embodiment, both ends of the bubble level 2 are integrally connected to extended mounting grooves 6 for installing a detachable vertical ruler plate 3. The top surfaces of the two extended mounting grooves 6 are each provided with a plurality of adjusting screw holes 7 arranged in a ring array at equal intervals. The detachable vertical ruler plate 3 is hinged in the extended mounting groove 6 by a pin 12, and the detachable vertical ruler plate 3 is connected to one of the adjusting screw holes 7 by a locking bolt 13, so that the detachable vertical ruler plate 3 and the bubble level 2 are perpendicular to each other. When the verticality measuring ruler assembly 1 measures the T-shaped wall 16 and rectangular wall column 20 at the construction site, the verticality measuring ruler assembly 1 first measures the verticality between the inner walls of the T-shaped wall 16. Then, the detachable vertical auxiliary plate 9 is removed from the detachable vertical ruler plate 3 and connected to the bubble level 2 to measure the verticality of the outer wall of the T-shaped wall 16. The design of multiple equidistant adjustment screw holes 7 in a ring helps to adjust different included angles between the detachable vertical ruler 3 and the bubble level 2. In this embodiment, the adjustment screw holes 7 are equidistantly spaced in a semi-circle. One of the adjustment screw holes 7 at both ends can be connected to the locking bolt 13 to make it perpendicular to the detachable vertical ruler 3. When it is necessary to adjust the detachable vertical ruler 3 to a tilted state, the detachable vertical ruler 3 is rotated in the extended mounting groove 6 under the action of the pin 12 to adjust to the required angle, and then connected to the adjustment screw hole 7 at the required position by the locking bolt 13. This achieves the locking of the tilted state of the detachable vertical ruler 3, which helps to detect walls at different required angles. When inspecting the T-shaped wall 16, first adjust the bubble level 2 and the detachable vertical ruler 3 to be perpendicular to each other. Then, place the verticality measuring ruler assembly 1 against the inner wall angle of the T-shaped wall 16 to check the verticality. Subsequently, remove the detachable vertical auxiliary plate 9 and insert it into the bubble level 2. Slide the bubble level 2 to adjust the distance between the detachable vertical ruler 3 and the detachable vertical auxiliary plate 9 according to the thickness of one of the walls of the T-shaped wall 16 to be inspected. This allows the detachable vertical ruler 3 and the detachable vertical auxiliary plate 9 to clamp one of the walls of the T-shaped wall 16 and check the verticality of the outer wall of the T-shaped wall 16. The inner wall of the bubble level 2 is always used as the verticality standard. The detachable vertical ruler 3 and the detachable vertical auxiliary plate 9 are used to check whether the outer wall is vertical, thereby determining whether the outer walls of the two intersecting walls of the T-shaped wall 16 are perpendicular. When inspecting the rectangular wall column 20, simply surround and clamp the detachable vertical ruler plate 3, the detachable vertical sub-plate 9, and the bubble level 2 around the rectangular wall column 20. Always use the inner wall of the bubble level 2 as the verticality standard to inspect the verticality of the outer wall of the rectangular wall column 20, thereby satisfying the verticality inspection of different walls.

[0026] In this embodiment, multiple bubble tubes 4 with different installation directions are embedded inside the bubble level 2, and a handle 5 is installed on one side of the outer wall of the bubble level 2.

[0027] In this embodiment, each extended mounting groove 6 has a pin hole 8 on its outer wall located in the middle of the semi-circular adjusting screw hole 7 for mounting the pin shaft 12. Both the adjusting screw hole 7 and the pin hole 8 penetrate the end of the bubble level 2.

[0028] In this embodiment, the outer wall of the detachable vertical ruler plate 3 has an installation recess 10 for the detachable vertical sub-plate 9 to be fitted and installed. The installation recess 10 is dynamically locked together with the detachable vertical sub-plate 9 by a fastener.

[0029] In this embodiment, a plurality of first permanent magnets 11 are symmetrically embedded in the inner wall of the mounting recess 10, and a plurality of magnet pieces that magnetically attract the first permanent magnets 11 are symmetrically embedded in the inner wall of the detachable vertical sub-plate 9.

[0030] In this embodiment, the T-shaped wall 16 includes a first wall 14 and a second wall 15 connected together. When the verticality of the inner wall of the T-shaped wall 16 is tested, the detachable vertical ruler 3 is flipped and adjusted as shown in the attached figure. Figure 4 and attached Figure 5 As shown, the bubble level 2 and the detachable vertical ruler 3 are still perpendicular to each other and are back-to-back attached to the inner walls of the first wall 14 and the second wall 15.

[0031] In this embodiment, when testing the verticality of the outer wall of the T-shaped wall 16, the detachable vertical ruler plate 3, the detachable vertical sub-plate 9, and the bubble level 2 are clamped around the outer wall of the second wall 15. After the inner side is vertical, the outer side is then tested. If both are vertical, the verticality of the T-shaped wall 16 is considered acceptable; if one is not vertical, the verticality of the T-shaped wall 16 is considered unacceptable.

[0032] In this embodiment, the bubble level 2 is provided with a travel groove 17 on the side away from the handle 5, which allows the detachable vertical subplate 9 to slide and adjust its position.

[0033] In this embodiment, a slider snap-fit ​​box 18 for positioning and inserting a detachable vertical subplate 9 is slidably installed in the inner cavity of the travel groove 17, and the slider snap-fit ​​box 18 is in sliding friction contact with the travel groove 17.

[0034] In this embodiment, a second permanent magnet 19 is embedded in the slider latch box 18, and the second permanent magnet 19 magnetically engages with the magnet sheet fixed to the inner wall of the travel groove 17. When it is necessary to adjust the position of the detachable vertical sub-plate 9, the detachable vertical sub-plate 9 is manually pushed to disengage the second permanent magnet 19 from the magnet sheet. Then, the detachable vertical sub-plate 9 drives the slider latch box 18 to slide in the travel groove 17 to adjust the position. After adjusting the position, the detachable vertical sub-plate 9 is pushed towards the travel groove 17 by hand, so that the second permanent magnet 19 and the magnet sheet magnetically engage and fix, thereby fixing the position of the detachable vertical sub-plate 9. In addition, when the verticality measuring ruler assembly 1 in this embodiment is used to test the verticality of the outer wall of the L-shaped wall 21 at the construction site, it is only necessary to place the inner angle of the bubble level ruler 2 and the detachable vertical ruler plate 3 against the outer wall of the L-shaped wall 21. When testing the inner verticality of the L-shaped wall 21, the bubble level ruler 2 and the detachable vertical ruler plate 3 need to be placed against the inner wall of the L-shaped wall 21.

[0035] In this embodiment, the type of the first permanent magnet 11, the second permanent magnet 19, and the magnet sheet needs to be selected based on the actual construction requirements. The magnets need to provide sufficient attraction to maintain stable connection or positioning between components, while also allowing operators to relatively easily overcome magnetic forces to make necessary adjustments. Common permanent magnet materials include neodymium iron boron (NdFeB), samarium cobalt (SmCo), and ferrite. Neodymium iron boron magnets are preferred due to their high energy product and strong magnetic field strength, making them suitable for applications requiring strong attraction. If the application environment has high temperatures or special requirements for corrosion resistance, samarium cobalt magnets can be considered. If the device will be used in a humid or dusty environment, it is recommended to plate the magnet surface (e.g., with nickel plating) to improve corrosion resistance and extend service life.

[0036] Working principle The verticality testing device for building construction quality inspection has a detachable vertical ruler plate 3 hinged to the extended mounting groove 6 at one end of the bubble level 2 via a pin 12. The detachable vertical ruler plate 3 is adjusted to form a 90° right angle with the bubble level 2, and then fixed by screwing the locking bolt 13 into the corresponding adjusting screw hole 7 to form a stable "L"-shaped main testing structure. If the outer wall needs to be tested, the detachable vertical auxiliary plate 9 can be removed from the mounting groove 10 on the detachable vertical ruler plate 3 for later use. When the detachable vertical ruler plate 3 is not used or testing is not required, the detachable vertical ruler plate 3 can be removed.

[0037] When testing the verticality of the inner wall of the T-shaped wall 16: Define the T-shaped wall 16 as a cross wall formed by the perpendicular connection of the first wall 14 and the second wall 15. Hold the handle 5 and press one side of the bubble level 2 against the inner wall of the first wall 14, while simultaneously pressing the detachable vertical ruler 3 against the inner wall of the second wall 15. Observe the vertical bubble tube 4 inside the bubble level 2 and check whether there are gaps between each ruler and the wall to determine if the bubble is centered. If the bubble is centered and there are no gaps between each ruler and the corresponding wall, it means that the inner angle between the two walls is 90° and the verticality is qualified. If the bubble is offset or there are gaps between each ruler and the corresponding wall, it means that there is tilt. Record the unqualified position. If it is necessary to adjust the testing angle, such as testing a non-90° angle, the locking bolt 13 can be loosened, the detachable vertical ruler 3 can be rotated to the required angle, and then the locking bolt 13 can be used to fix it in the corresponding adjusting screw hole 7 to achieve arbitrary angle testing and complete the inner wall verticality test.

[0038] When testing the verticality of the outer wall of the T-shaped wall 16: After completing the inner wall test, remove the detachable vertical sub-plate 9 from the detachable vertical ruler plate 3, insert the detachable vertical sub-plate 9 into the travel groove 17 on the side of the bubble level 2 away from the handle 5, and drive it to slide in the travel groove 17 through the slider snap box 18. Adjust the position of the detachable vertical sub-plate 9 so that the distance between it and the detachable vertical ruler plate 3 is equal to the thickness of the wall to be tested, such as the second wall 15. Push the detachable vertical sub-plate 9 to overcome the magnetic attraction between the second permanent magnet 19 and the magnetic piece in the travel groove 17 to achieve sliding. After it is in place, release the handle and push the second permanent magnet 19 to attract and fix it to the magnetic piece, keeping the position stable. Clamp the bubble level 2 and the detachable vertical ruler 3 against one side of the outer wall of the second wall 15, while the detachable vertical auxiliary plate 9 abuts against the other side of the outer wall, forming a "three-sided enclosure" structure. Observe the bubble tube 4 in the vertical direction in the bubble level 2: if the bubble is centered and there is no gap between each ruler and the corresponding wall, the outer wall is vertical and the overall verticality of the wall is good; if the bubble is offset or there is a gap between each ruler and the corresponding wall, the outer wall is not vertical and there may be a construction deviation. This achieves reverse verification based on the outer wall and judges the overall vertical quality by combining internal and external measurements.

[0039] When checking the verticality of the rectangular wall column 20: The detachable vertical ruler plate 3 and the detachable vertical auxiliary plate 9 are respectively installed at both ends of the bubble level 2. One end is hinged and locked, while the other end is adjusted by sliding the travel groove to adjust the position of the detachable vertical auxiliary plate 9 so that its spacing with the detachable vertical ruler plate 3 matches the width of the rectangular wall column 20. The entire device is placed around the outer perimeter of the rectangular wall column 20, so that the bubble level 2, the detachable vertical ruler plate 3, and the detachable vertical auxiliary plate 9 respectively fit against three adjacent surfaces of the wall column, as shown in the attached figure. Figure 8As shown, the device is moved sequentially to detect the verticality of each side, observe whether the bubble is centered and check whether there is a gap between each ruler and the wall, and determine whether each side is vertical. This allows for continuous detection of the verticality of the four sides of an independent column.

[0040] When checking the verticality of the L-shaped wall 21: Place the bubble level 2 and the detachable vertical ruler 3 against the inner corner of the L-shaped wall 21; observe whether the bubble in the bubble tube 4 is centered and check whether there are gaps between each ruler and the wall to determine if the inner corner is perpendicular. Place the inner corner of the bubble level 2 and the detachable vertical ruler 3 against the outer corner of the L-shaped wall 21; similarly observe the bubble state to determine if the outer corner is perpendicular. The verticality check of the L-shaped wall 21 is now complete.

[0041] When it is necessary to test inclined walls or special angles: loosen the locking bolt 13 to release the lock on the detachable vertical ruler plate 3; rotate the detachable vertical ruler plate 3 around the pin 12 to the target angle; select the appropriate adjusting screw hole 7 and re-tighten the locking bolt 13 to achieve fixation at any angle. The magnetic attraction between the first permanent magnet 11 in the mounting recess 10 and the magnetic piece on the detachable vertical sub-plate 9 enhances the connection stability and prevents loosening.

[0042] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A verticality testing device for quality inspection of building engineering projects, characterized in that, include: Verticality measuring ruler assembly (1), used to inspect T-shaped walls (16) and rectangular wall columns (20) on the construction site, including bubble level (2) and a detachable vertical ruler plate (3) movably installed at at least one end of bubble level (2). A detachable vertical subplate (9) is movably installed in a detachable vertical ruler plate (3), and one end of the detachable vertical ruler plate (3) is inserted into a bubble level (2) and can be adjusted in the bubble level (2). The detachable vertical subplate (9) and the bubble level (2) are perpendicular to each other. Both ends of the bubble level (2) are integrally connected to an extended mounting groove (6) for installing a detachable vertical ruler plate (3). The top surfaces of the two extended mounting grooves (6) are provided with multiple adjusting screw holes (7) arranged in an annular array. The detachable vertical ruler plate (3) is hinged in the extended mounting groove (6) by a pin (12), and the detachable vertical ruler plate (3) is connected to one of the adjusting screw holes (7) by a locking bolt (13), so that the detachable vertical ruler plate (3) and the bubble level (2) are perpendicular to each other.

2. The verticality testing device for building engineering quality inspection according to claim 1, characterized in that: The bubble level (2) has multiple bubble tubes (4) with different installation directions embedded inside, and a handle (5) is installed on one side of the outer wall of the bubble level (2).

3. A verticality testing device for building construction quality inspection according to claim 2, characterized in that: Each of the extended mounting grooves (6) has a pin hole (8) on its outer wall, located in the middle of the half-circle adjusting screw hole (7), for mounting the pin shaft (12). The adjusting screw hole (7) and the pin hole (8) both penetrate the end of the bubble level (2).

4. A verticality testing device for building construction quality inspection according to claim 3, characterized in that: The outer wall of the detachable vertical ruler plate (3) has an installation recess (10) for the detachable vertical sub-plate (9) to be fitted and installed. The installation recess (10) is dynamically locked together with the detachable vertical sub-plate (9) by a fastener.

5. A verticality testing device for building engineering quality inspection according to claim 4, characterized in that: The inner wall of the mounting recess (10) is symmetrically embedded with a plurality of first permanent magnets (11), and the inner wall of the detachable vertical sub-plate (9) is symmetrically embedded with a plurality of magnet pieces that magnetically attract the first permanent magnets (11).

6. A verticality testing device for building construction quality inspection according to claim 5, characterized in that: The T-shaped wall (16) includes a first wall (14) and a second wall (15) connected together. When the verticality of the inner wall of the T-shaped wall (16) is tested, the detachable vertical ruler (3) is flipped and adjusted so that the bubble level (2) and the detachable vertical ruler (3) are still perpendicular to each other and back against the inner walls of the first wall (14) and the second wall (15).

7. A verticality testing device for quality inspection of building engineering according to claim 6, characterized in that: When the verticality of the outer wall of the T-shaped wall (16) is tested, the detachable vertical ruler plate (3), the detachable vertical sub-plate (9), and the bubble level (2) are clamped on the outer wall of the second wall (15).

8. A verticality testing device for quality inspection of building engineering according to claim 7, characterized in that: The bubble level (2) has a travel groove (17) on the side away from the handle (5) for the detachable vertical subplate (9) to slide and adjust its position.

9. A verticality testing device for quality inspection of building engineering according to claim 8, characterized in that: The inner cavity of the travel groove (17) is slidably installed with a slider snap box (18) for positioning and inserting a detachable vertical subplate (9), and the slider snap box (18) is in sliding friction contact with the travel groove (17).

10. A verticality testing device for quality inspection of building engineering according to claim 9, characterized in that: The slider snap-fit ​​box (18) is fixedly embedded with a second permanent magnet (19), and the second permanent magnet (19) magnetically attracts the magnet sheet fixed to the inner wall of the travel groove (17).

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