Crack detection ruler for building engineering quality detection
By designing a crack detection ruler with sliding connection and threaded adjustment components, the problems of rapid positioning and fixation were solved, achieving smooth and continuous displacement and accurate angle measurement, thus improving the measurement efficiency and accuracy of building engineering quality inspection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 曹县建筑工程质量检测站
- Filing Date
- 2025-09-29
- Publication Date
- 2026-07-28
AI Technical Summary
Existing crack detection rulers lack rapid positioning and fixing mechanisms, have unstable moving block designs that make it difficult to achieve smooth and continuous displacement adjustment, and lack an angle reference system, which affects the accuracy and reliability of measurements.
A crack detection ruler was designed, which includes components such as a moving rod, a fixed rod, a spring, and a protractor. It achieves rapid positioning and fixation through sliding connection and threaded adjustment, expands the measurement range, and integrates a protractor to provide accurate angle measurement.
It improves the flexibility and adaptability of measurement, ensures the accuracy and comparability of measurement results, and is particularly suitable for measuring irregular cracks, simplifying the operation process.
Smart Images

Figure CN224568099U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inspection ruler technology, and more specifically, to a crack inspection ruler for quality inspection of building engineering. Background Technology
[0002] In existing technologies, the marking scales of existing crack detection rulers lack a rapid positioning and fixing mechanism. In traditional designs, the movement of the marking scale often relies on simple sliding guides or threaded adjustment methods. This design requires operators to make repeated adjustments to achieve an accurate measurement position. In actual use, operators need to observe the crack position while manually adjusting the marking scale. This dual operation not only increases the complexity of the work, but also makes it difficult to guarantee the consistency and repeatability of the measurement.
[0003] The existing crack detection rulers often lack a displacement control mechanism in their moving block design. During the movement process, the moving block is prone to jamming, jumping, or overshooting, making it difficult to achieve smooth and continuous displacement adjustment. This unstable movement characteristic makes it difficult for operators to accurately position the moving block to the start and end points of the crack, affecting the accuracy of length measurement.
[0004] Existing crack detection rulers lack a reference system for angle measurement. Traditional designs often assume that cracks develop in a horizontal or vertical direction, but cracks in actual engineering are often irregular in direction and exhibit various angles of inclination. The lack of an angle reference makes accurate measurement of inclined cracks extremely difficult and significantly reduces the reliability of measurement results. Utility Model Content
[0005] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a crack detection ruler for building engineering quality inspection, so as to solve the technical problem mentioned in the background art that the marking ruler of the existing crack detection ruler lacks a rapid positioning and fixing mechanism.
[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a crack detection ruler for building engineering quality inspection, comprising a first marking ruler, a measuring component on the first marking ruler, the measuring component comprising a moving rod and a second marking ruler, the moving rod being slidably connected to the first marking ruler, the second marking ruler being connected to the moving rod, a fixed rod being slidably connected to the first marking ruler and the second marking ruler, a pull plate being connected to one end of the fixed rod, a spring being sleeved on the fixed rod, the two ends of the spring being connected to the pull plate and the second marking ruler, a moving component on the first marking ruler, the moving component comprising a third marking ruler and a moving block, the third marking ruler being connected to the first marking ruler, and the moving block being slidably connected to both ends of the third marking ruler.
[0007] The present invention is further configured such that fixing holes are evenly provided on the first marking ruler, and the fixing holes are adapted to the fixing rod, thereby facilitating the fixing process of the fixing rod.
[0008] The present invention is further configured such that a guide groove is provided on the first marking ruler, the guide groove being adapted to the moving rod, thereby facilitating the completion of the moving rod's movement process.
[0009] The present invention is further provided that the movable block has holes, and the use of the holes facilitates the completion of the use of the movable block.
[0010] The present invention is further configured such that a first marking head and a second marking head are installed on the moving block, and the cooperation of the various components facilitates the completion of the gap measurement process.
[0011] The present invention is further configured such that a threaded rod is threadedly connected to the movable block, and one end of the threaded rod abuts against the third marking ruler, thereby facilitating the fixing process of the movable block.
[0012] The present invention is further configured such that an angle measuring component is provided on the third marking ruler, the angle measuring component includes a protractor and a first rotating ruler, the protractor is disposed on the third marking ruler, and the first rotating ruler is rotatably connected to the protractor, and the cooperation of each component facilitates the completion of the angle measurement process.
[0013] The present invention is further configured such that a second rotating ruler is rotatably connected to the protractor, thereby facilitating the completion of the angle measurement process by using the second rotating ruler.
[0014] (III) Beneficial Effects Compared with the prior art, this utility model provides a crack detection ruler for building engineering quality inspection, which has the following beneficial effects: 1. The measuring component uses a sliding connection between the moving rod and the first marking ruler to enable rapid position adjustment of the second marking ruler. Compared with traditional fixed measuring tools, this adjustable design greatly improves the flexibility and adaptability of the measurement. Operators can quickly adjust the measurement range according to the distribution of different cracks without having to change measuring tools of different specifications.
[0015] 2. The sliding connection design of the moving block at both ends of the third marker ruler allows the measurement range to be extended in two directions, significantly expanding the measurement coverage under a single setting. This design is particularly suitable for applications that measure long cracks or require multi-point comparative measurements, avoiding the trouble of frequently repositioning the measuring tool.
[0016] 3. The integrated design of the protractor provides a professional solution for crack angle measurement. Compared with traditional visual inspection or simple tool measurement methods, the protractor can provide accurate angle readings, meeting the stringent requirements of engineering inspection for angle measurement accuracy. The standardized angle scale ensures good comparability and traceability of measurement results. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the crack detection ruler for building engineering quality inspection in this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a partial side view of the structure of this utility model; Figure 5 This is a schematic diagram of the angle measuring component in this utility model; Figure 6 This is a schematic diagram of the structure of the movable component in this utility model.
[0018] In the diagram: 1. First marking ruler; 2. Moving rod; 3. Second marking ruler; 4. Fixed rod; 5. Pull plate; 6. Spring; 7. Third marking ruler; 8. Moving block; 9. Fixed hole; 10. Guide groove; 11. Hole; 12. First marking head; 13. Second marking head; 14. Threaded rod; 15. Protractor; 16. First rotating ruler; 17. Second rotating ruler. Detailed Implementation
[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0021] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.
[0022] Please see Figures 1-6A crack detection ruler for building engineering quality inspection includes a first marking ruler 1, on which a measuring component is provided. The measuring component includes a moving rod 2 and a second marking ruler 3. The moving rod 2 is slidably connected to the first marking ruler 1, and the second marking ruler 3 is connected to the moving rod 2. A fixed rod 4 is slidably connected to the first marking ruler 1 and the second marking ruler 3. A pull plate 5 is connected to one end of the fixed rod 4, and a spring 6 is sleeved on the fixed rod 4. The two ends of the spring 6 are connected to the pull plate 5 and the second marking ruler 3. A moving component is provided on the first marking ruler 1, which includes a third marking ruler 7 and a moving block 8. The third marking ruler 7 is connected to the first marking ruler 1, and the moving block 8 is slidably connected to both ends of the third marking ruler 7.
[0023] The first marking ruler 1 has evenly spaced fixing holes 9, which are adapted to the fixing rod 4.
[0024] The first marking ruler 1 has a guide groove 10, which is adapted to the moving rod 2. The movable block 8 has a hole 11.
[0025] The movable block 8 is equipped with a first marker head 12 and a second marker head 13.
[0026] The movable block 8 is threaded with a threaded rod 14, one end of which abuts against the third marking ruler 7.
[0027] In this embodiment, pulling the pull plate 5 causes the fixing rod 4 to slide along the first marking ruler 1 and the second marking ruler 3. During this sliding movement, the spring 6 between the pull plate 5 and the second marking ruler 3 is stretched, causing one end of the fixing rod 4 to move out of the fixing hole 9 on the first marking ruler 1, thereby releasing the fixing process of the second marking ruler 3. Then, the second marking ruler 3 and the moving rod 2 thereon slide along the guide groove 10 on the first marking ruler 1. After moving to the appropriate position, the pull plate 5 is released, causing the fixing rod 4 to move under the elastic potential energy of the spring 6, so that it is inserted into the moving rod 2. And in the first marking ruler 1, the first marking ruler 1 and the second marking ruler 3 are fixed, and the first marking ruler 1 and the second marking ruler 3 are used to perform the measurement process. Then, when it is necessary to measure a suitable position, the threaded rod 14 is screwed off the moving block 8 and removed. Then the moving block 8 is slid along the third marking ruler 7. After sliding to a suitable position, the threaded rod 14 is rotated along the moving block 8 so that the threaded rod 14 is rotated to a position that abuts against the third marking ruler 7, thereby completing the fixing process of the moving block 8. And the first marking head 12 and the second marking head 13 are aligned with the two ends of the gap to be measured, thereby completing the measurement process of the gap.
[0028] Please see Figure 5-6 An implementation method for a crack detection ruler for building engineering quality inspection as an angle measurement component: An angle measurement component is provided on the third marking ruler 7. The angle measurement component includes a protractor 15 and a first rotating ruler 16. The protractor 15 is provided on the third marking ruler 7, and the first rotating ruler 16 is rotatably connected to the protractor 15.
[0029] A second rotating ruler 17 is rotatably connected to the protractor 15.
[0030] More specifically, when it is necessary to measure the angle of the gap, the first rotating ruler 16 and the second rotating ruler 17 are rotated along the protractor 15 so that the first rotating ruler 16 and the second rotating ruler 17 are rotated to the two ends of the gap to be measured, so that they can be used together to complete the angle measurement process, which facilitates the measurement of the crack and makes it more convenient to use.
[0031] In summary, during the use or operation of the overall equipment: pulling the pull plate 5 causes the fixing rod 4 to slide along the first marking ruler 1 and the second marking ruler 3. This sliding movement stretches the spring 6 between the pull plate 5 and the second marking ruler 3, causing one end of the fixing rod 4 to move out of the fixing hole 9 on the first marking ruler 1, thus releasing the fixing of the second marking ruler 3. Then, the second marking ruler 3 and its moving rod 2 slide along the guide groove 10 on the first marking ruler 1. After moving to the appropriate position, the pull plate 5 is released, causing the fixing rod 4 to move under the elastic potential energy of the spring 6, allowing it to be inserted into... The moving rod 2 and the first marking ruler 1 are used to fix the first marking ruler 1 and the second marking ruler 3, thereby using the first marking ruler 1 and the second marking ruler 3 to perform the measurement process. When it is necessary to measure a suitable position, the threaded rod 14 is screwed off the moving block 8 and removed. Then, the moving block 8 is slid along the third marking ruler 7. After sliding to a suitable position, the threaded rod 14 is rotated along the moving block 8 so that the threaded rod 14 is rotated to a position that abuts against the third marking ruler 7, thereby completing the fixing process of the moving block 8. The first marking head 12 and the second marking head 13 are then aligned with the two ends of the gap to be measured, thereby completing the measurement process of the gap.
[0032] When it is necessary to measure the angle of the gap, the first rotating ruler 16 and the second rotating ruler 17 are rotated along the protractor 15 so that the first rotating ruler 16 and the second rotating ruler 17 are rotated to the two ends of the gap to be measured, so that they can be used together to complete the angle measurement process, which facilitates the measurement of the crack and makes it more convenient to use.
[0033] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.
Claims
1. A crack detection ruler for construction engineering quality detection, comprising a first marking ruler (1), characterized in that: A measuring component is provided on the first marking ruler (1). The measuring component includes a moving rod (2) and a second marking ruler (3). The moving rod (2) is slidably connected to the first marking ruler (1). The second marking ruler (3) is connected to the moving rod (2). A fixed rod (4) is slidably connected to the first marking ruler (1) and the second marking ruler (3). A pull plate (5) is connected to one end of the fixed rod (4). A spring (6) is sleeved on the fixed rod (4). The two ends of the spring (6) are connected to the pull plate (5) and the second marking ruler (3). A moving component is provided on the first marking ruler (1). The moving component includes a third marking ruler (7) and a moving block (8). The third marking ruler (7) is connected to the first marking ruler (1). The moving block (8) is slidably connected to both ends of the third marking ruler (7).
2. The crack detection ruler for construction quality detection according to claim 1, characterized in that: The first marking ruler (1) is provided with uniformly spaced fixing holes (9), which are adapted to the fixing rod (4).
3. The crack detection ruler for building engineering quality inspection according to claim 2, characterized in that: The first marking ruler (1) has a guide groove (10) which is adapted to the moving rod (2).
4. The crack detection ruler for building engineering quality inspection according to claim 3, characterized in that: The movable block (8) has a hole (11).
5. The crack detection ruler for building engineering quality inspection according to claim 4, characterized in that: The moving block (8) is equipped with a first marker head (12) and a second marker head (13).
6. The crack detection ruler for building engineering quality inspection according to any one of claims 1-5, characterized in that: The movable block (8) is threaded with a threaded rod (14), one end of which abuts against the third marking ruler (7).
7. The crack detection ruler for building engineering quality inspection according to claim 6, characterized in that: An angle measuring component is provided on the third marking ruler (7). The angle measuring component includes a protractor (15) and a first rotating ruler (16). The protractor (15) is set on the third marking ruler (7), and the first rotating ruler (16) is rotatably connected to the protractor (15).
8. The crack detection ruler for building engineering quality inspection according to claim 7, characterized in that: A second rotating ruler (17) is rotatably connected to the protractor (15).