Tool for detecting flatness of arc-shaped structure

Abstract

The utility model relates to the technical field of arc-shaped structure flatness detection, and particularly discloses an arc-shaped structure flatness detection tool which comprises an arc-shaped groove and a light source. The design radian of the arc-shaped groove is consistent with that of the arc surface; an opening faces the arc surface when the arc-shaped groove is attached to the arc surface; an elastic material is arranged at the periphery of the opening direction; a hole is formed in the end part of the arc-shaped groove, and a sealing ring is arranged at the hole; the light source is fixed in the arc-shaped groove, and the other side faces of the arc-shaped groove except the opening direction are light-proof. The objective of the utility model is to solve the problems of low accuracy and complex operation of a traditional flatness detection method. The method is mainly used for detecting the flatness of the arc-shaped structure.

Description

Technical Field

[0001] This utility model relates to the field of arc structure flatness detection technology, and in particular to a tool for arc structure flatness detection. Background Technology

[0002] In building construction, especially when dealing with curved structures, traditional flatness inspection methods mainly rely on visual inspection or simple manual tools, such as straightedges and the chord distance method. Straightedges are primarily used for straight lines or relatively simple planes. For curved structures, because they are not specifically designed for curved shapes, they are difficult to precisely fit the curved surface, leading to inaccurate results. While the chord distance method is a simple and accurate measurement method, it is suitable for flat, unobstructed areas. In practice, its application is limited by complex terrain or obstacles, and it requires more calculations and on-site operations, increasing complexity. Therefore, traditional flatness inspection methods suffer from low accuracy and operational complexity.

[0003] A search revealed that in the prior art, publication number CN216308820U provides a measuring ruler for detecting the curvature deviation of an arc-shaped wall, comprising a ruler body and a measuring ruler shell. The ruler body is an arc-shaped frame structure with a rectangular cross-section. An outer positioning strip is provided at the upper end of the ruler body along its outer arc, and an inner positioning strip is provided at the lower end of the ruler body along its inner arc. A first support is provided on the left side of both the outer and inner arc surfaces of the ruler body, with the left end face of the first support flush with the left end face of the ruler body. A second support is provided on the right side of both the outer and inner arc surfaces of the ruler body. The right end face is flush with the right end face of the ruler body. The measuring ruler shell is a rectangular shell structure. When measuring the curvature deviation of an arc-shaped wall, the arc-shaped surface of the ruler body is brought into contact with the arc-shaped surface of the arc-shaped wall, with the inner positioning strip facing upward. Then, the measuring ruler shell is placed on the ruler body and brought into contact with the inner positioning strip. Then, the measuring ruler shell is moved on the ruler body and the slider is pushed, keeping the telescopic rod in contact with the arc-shaped surface of the arc-shaped wall. The distance between the ruler body and the arc-shaped surface of the arc-shaped wall is measured according to the movement distance of the slider, thus completing the measurement of the curvature deviation of the arc-shaped surface of the arc-shaped wall. It can also detect the inner and outer arc surfaces of the arc-shaped wall. The structure is simple, practical, easy to operate, and highly practical.

[0004] However, during the above testing process, the test results can only be displayed through scale values. The gap between the curved wall and the ruler is small, resulting in small changes in scale values. This makes it difficult for operators to observe the results, increasing the difficulty of testing and reducing the accuracy of the test results. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a tool for detecting the flatness of arc-shaped structures. By directly observing the number and location of light leakage points, it solves the problem of low accuracy in existing arc-shaped structure measurement methods.

[0006] To solve the above problems, the technical solution adopted by this utility model is: a tool for detecting the flatness of an arc-shaped structure, characterized in that: it includes an arc-shaped groove and a light source; the arc-shaped groove has the same design curvature as the arc surface, and the opening of the arc-shaped groove faces the arc surface when it is in contact with the arc surface; elastic material is installed around the opening; a hole is opened at the end of the arc-shaped groove, and a sealing ring is provided at the opening; the light source is fixed in the arc-shaped groove, and the arc-shaped groove is opaque on all sides except for the opening direction.

[0007] The technical principle behind this solution is as follows: Light travels in a straight line in a uniform medium. When the opening of the tool for detecting the flatness of an arc-shaped structure is tightly fitted to the surface being measured, if no light is visible emanating from the arc-shaped groove, it proves that the flatness of the arc-shaped structure meets the requirements. An elastic material is installed in the opening direction of the arc-shaped groove. This elastic material follows Hooke's Law, meaning that after being subjected to force, the stress and strain within the material are linearly related. By determining the magnitude of the applied force, the amount of expansion and contraction of the elastic material can be judged, thereby determining the specific deviation value of the flatness of the arc-shaped wall surface.

[0008] The beneficial effects of this solution are: improved detection efficiency and accuracy, and ease of operation. By determining the slotting direction and curvature of the detection tool through the arc structure design drawings, the accuracy of the measurement results is guaranteed. Compared with traditional measurement methods, this tool can quickly complete the flatness detection of the arc structure by directly touching the arc surface being measured.

[0009] Furthermore, several scale lines or numerical marks are provided on the side of the arc-shaped groove along its length to directly locate the light leakage position of the arc-shaped structure being measured.

[0010] Furthermore, the light source is fixed to the bottom or side wall of the arc-shaped groove. Fixing the light source can provide more uniform and stable lighting conditions.

[0011] Furthermore, the elastic material is connected to the arc-shaped groove opening via a groove. This groove connection facilitates the installation and replacement of the elastic material, improving maintenance efficiency.

[0012] Furthermore, the elastic material is rubber with a thickness not exceeding 10 mm. Rubber is soft and has good cushioning properties, protecting the tested arc surface from damage during testing. Moreover, rubber material is relatively easy to replace and maintain, facilitating long-term use and ensuring the tool's performance and accuracy. Attached Figure Description

[0013] Figure 1This is an isometric view of the arc groove of the arc structure flatness testing tool, which opens along the outer arc direction.

[0014] Figure 2 This is a top view of the arc-shaped groove of the arc-shaped structure flatness testing tool, which opens along the outer arc direction.

[0015] Figure 3 This is an isometric view of the arc groove of the arc structure flatness testing tool, which opens along the inner arc direction.

[0016] Figure 4 This is a top view of the arc-shaped groove of the arc-shaped structure flatness testing tool, which opens along the inner arc direction.

[0017] The reference numerals in the accompanying drawings include: 1. arc groove; 2. elastic material; 3. sealing ring; 4. light source. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method:

[0019] Example 1:

[0020] As attached Figure 1-2 As shown: A tool for detecting the flatness of an arc-shaped structure, characterized in that: it includes an arc-shaped groove 1 and a light source 4; the arc-shaped groove 1 has the same designed curvature as the arc surface, and when the arc surface of the arc-shaped groove 1 is in contact with the arc surface structure being measured, the opening faces the inner arc surface; an elastic material 2 is installed around the opening direction; an opening is made at the end of the arc-shaped groove 1, and a sealing ring 3 is provided at the opening; the light source 4 is fixed inside the arc-shaped groove 1, and the arc-shaped groove 1 is opaque on all sides except for the opening direction.

[0021] The side of the arc groove 1 is provided with several scale lines or numerical marks along the length of the arc groove 1. When the opening of the arc groove 1 is facing the arc structure to be tested, the location of the light leakage point of the arc groove 1 can be directly observed to quickly and accurately determine the place where the flatness of the arc structure to be tested is insufficient, thus improving the accuracy of flatness detection.

[0022] The light source 4 is fixed to the bottom or side wall of the arc-shaped groove 1. When the light source 4 needs an external power cord, the power cord passes through the opening at the end of the arc-shaped groove 1, and a sealing ring 3 is provided at the opening to prevent the light source 4 in the arc-shaped groove 1 from leaking out through the opening. When the light source 4 does not need an external power cord and can emit light on its own, the opening at the end of the arc-shaped groove 1 is directly sealed by the sealing ring 3 to prevent the light source 4 in the arc-shaped groove 1 from leaking out through the opening.

[0023] The elastic material 2 is connected to the opening of the arc-shaped groove 1 via a groove. The elastic material 2 is rubber and its thickness does not exceed 10 mm. The elastic material 2 has a groove, the width of which is the same as the thickness of the arc-shaped groove 1, and the depth of which is half the diameter of the elastic material 2 or half the length in the groove direction. The elastic material 2 is connected to the arc-shaped groove 1 by utilizing the friction between it and the groove. Detailed implementation method:

[0025] Step 1: Before use, calibrate the tool for detecting the flatness of an arc-shaped structure. The calibration steps are as follows:

[0026] S1: Inspect the appearance and structure of the tool for testing the flatness of the curved structure to ensure that the tool is intact. Pay special attention to ensuring that the elastic material is firmly installed and there are no signs of detachment or loosening.

[0027] S2: The arc surface of the testing tool arc groove 1 is attached to the standard arc structure. The standard arc structure has the same curvature as the arc surface of the arc structure being tested, and there is no leakage of the light source 4 when the standard arc structure and the arc surface of the testing tool arc groove 1 are attached together.

[0028] S3: Apply a uniform external force F1 perpendicular to the standard arc structure to the testing tool and record the deformation value S1 produced by the elastic material 2.

[0029] S4: Apply a uniform external force F2 perpendicular to the standard arc structure to the testing tool. The magnitude of the uniform external force F2 is twice that of the uniform external force F1. The position and direction of the uniform external force F2 are the same as those of the uniform external force F1. Record the deformation value S2 generated by the elastic material 2.

[0030] S5: Gradually increase the uniform external force Fn perpendicular to the standard arc structure. The magnitude of the uniform external force Fn is N times that of the uniform external force F1. The position and direction of the uniform external force Fn are consistent with those of the uniform external force F1. Record the deformation value Sn generated by the elastic material 2 until the applied uniform external force Fn+1 and the generated deformation value Sn+1 are no longer linearly related. Then, the previous uniform external force Fn and the corresponding deformation value Sn are used as the maximum uniform external force and the maximum deformation value that the detection tool can load.

[0031] Step 2: Place the arc-shaped surface of the arc groove 1 of the testing tool onto the arc-shaped structure to be tested, and observe whether there is any leakage of the light source 4. Record the location and number of leakage of the light source 4 through the scale lines or numerical marks on the arc groove.

[0032] Step 3: Apply a uniform external force F1 perpendicular to the arc-shaped structure being tested to the testing tool, observe whether there is any leakage of the light source 4, and record the uniform external force F1 through the scale lines or numerical marks on the arc groove, and record the location and number of leakage of the light source 4.

[0033] Step 4: Apply a uniform external force F2 perpendicular to the standard arc structure to the detection tool. The magnitude of the uniform external force F2 is twice that of the uniform external force F1. The position and direction of the uniform external force F2 are the same as those of the uniform external force F1. Observe whether there is leakage of the light source 4. Record the uniform external force F2 and the location and number of leakage of the light source 4 through the scale lines or numerical marks on the arc groove.

[0034] Step 5: Gradually increase the uniform external force Fn perpendicular to the standard arc structure. The magnitude of the uniform external force Fn is N times that of the uniform external force F1. The position and direction of the uniform external force Fn are the same as those of the uniform external force F1. Observe whether there is leakage of the light source 4. Record the uniform external force Fn and the location and number of leakage of the light source 4 through the scale lines or numerical marks on the arc groove.

[0035] Determining the location, quantity, and value of flatness deviations in curved structures:

[0036] By comparing the uniform external force Fn and deformation value Sn recorded in the usage step with the uniform external force Fn recorded in the usage step, and by combining the reduction in the location and number of light source leakage, the specific location, quantity, and specific value of the deviation in the flatness of the arc structure can be determined.

[0037] For example, in the verification process, there are 11 uniform external forces: F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, and F11, corresponding to 11 deformation values ​​S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, and S11, respectively. The deformation values ​​S1 to S10 of the uniform external forces applied in stages from F1 to F10 all satisfy a linear relationship. However, when the uniform external force is applied to F11, the corresponding deformation value S11 does not exhibit a linear relationship. Therefore, the uniform external force F10 and its corresponding deformation value S10 are taken as the maximum uniform external force and maximum deformation value that the testing tool can apply.

[0038] If the arc-shaped surface of the testing tool's arc groove 1 is attached to the arc-shaped structure being tested, five locations and a number of leaks from the light source 4 are observed. Under the action of a uniform external force F1, four locations and a number of leaks from the light source 4 are observed; under the action of a uniform external force F2, three locations and a number of leaks from the light source 4 are observed.

[0039] By querying the uniform external forces F1 and F2 and the corresponding deformation values ​​S1 and S2, it can be determined that under the action of uniform external force F1, the location and number of leaking light sources 4 on the tested arc structure decrease by 1, and the flatness deviation at that location is the deformation value S1. Under the action of uniform external force F2, the location and number of leaking light sources 4 on the tested arc structure are compared with those under the action of uniform external force F1. The location and number of leaking light sources 4 decrease by only 1, and the flatness deviation at that location is the deformation value S2. By gradually increasing the magnitude of the uniform external force Fn, the location and number of leaking light sources 4 are determined step by step. By comparing the uniform external force Fn used for verification with the corresponding deformation value Sn, the location, number, and specific deviation value of the flatness deviation of the tested arc structure can be determined.

[0040] If the uniform external force Fn used in the steps cannot be directly retrieved from the verification steps, an interpolation method can be used to calculate and derive the corresponding deformation value Sn.

[0041] Example 2:

[0042] As attached Figure 3-4 As shown: The difference from Embodiment 1 is that when the arc-shaped groove 1 is fitted with the arc-shaped surface of the measured arc surface structure, the opening faces the outer arc surface.

[0043] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tool for detecting the flatness of a curved structure, characterized by: The arc-shaped groove is consistent with the design radian of the arc surface, and the opening of the arc-shaped groove is directed to the arc surface when the arc-shaped groove is attached to the arc surface; the periphery of the opening is provided with elastic material; the end of the arc-shaped groove is provided with an opening, and a sealing ring is arranged at the opening; the light source is fixed in the arc-shaped groove, and the side surface of the arc-shaped groove is not translucent except the opening direction.

2. The tool for detecting the flatness of an arcuate structure according to claim 1, wherein: The side surface of the arc-shaped groove is provided with a plurality of scale lines or digital marks along the length direction of the arc-shaped groove.

3. The tool for detecting the flatness of an arcuate structure according to claim 1, wherein: The light source is fixed to the groove bottom or the side wall of the arc-shaped groove.

4. The tool for detecting the flatness of an arcuate structure according to claim 1, wherein: The elastic material is connected with the opening of the arc-shaped groove through a groove.

5. The tool for detecting the flatness of an arcuate structure according to claim 1, wherein: The elastic material is rubber, and the thickness is not more than 10 mm.

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