A portable concrete crack width ratio detection tool

Abstract

The utility model discloses a portable concrete crack width contrast detection tool, including the casing, the transparent color contrast card is established in casing left and right slide, and the rectangular groove is equipped in casing middle end and is penetrated, the through groove that is staggered and is penetrated with the rectangular groove is equipped in casing, and both ends of contrast card all extend from the through groove, the contrast bar of roughness is sequentially increased is equipped on contrast card, and the slider is fixedly connected on contrast card, and the sliding slot that can be connected with the slider sliding is equipped on the casing, the rectangular plate is equipped on the casing, and the magnifying glass is equipped on the rectangular plate.

Description

Technical Field

[0001] This utility model relates to the field of concrete technology, specifically to a portable concrete crack width comparison and detection tool. Background Technology

[0002] Concrete has high compressive strength, but its tensile strength is only about one-tenth of its compressive strength. This means it is very fragile under tension, and once the internal tensile stress exceeds this low limit, the concrete will crack. Before and after hardening, the volume of concrete is not constant; it shrinks or expands due to various factors such as water loss and temperature changes. When this change is constrained, tensile stress is generated internally.

[0003] Crack comparison cards (also known as crack width inspection cards or rulers) are the most commonly used and convenient crack measurement tools on site. Their principle is based on visual comparison; the card is held close to or against the concrete surface, and the crack is compared to the different standard width lines on the card to quickly determine the crack size. However, in practical use, the comparison card is difficult to fit tightly and move on uneven, rough, curved, or damp surfaces, easily causing wear and tear during crack measurement. Furthermore, if there are sharp objects on the structural surface, direct hand contact poses a danger. Therefore, there is room for technical improvement. Utility Model Content

[0004] This invention aims to solve the aforementioned technical problem of limitations in comparison cards used for measuring cracks, and provides a portable concrete crack width comparison and detection tool.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a portable concrete crack width comparison and detection tool, including a shell, a transparent comparison card that slides left and right inside the shell, a through rectangular groove in the middle of the shell, and a through slot that intersects with the rectangular groove inside the shell, with both ends of the comparison card extending out from the through slot; The comparison card is provided with comparison strips of progressively increasing thickness, and a slider is fixedly connected to the comparison card. The housing is provided with a sliding groove that can slide and connect with the slider. The housing is provided with a rectangular plate, and a magnifying glass is provided on the rectangular plate.

[0006] Furthermore, the bottom surface of the housing is provided with an anti-slip pad.

[0007] Furthermore, the width of the through groove is greater than that of the rectangular groove.

[0008] Furthermore, the bottom surface of the slider makes contact with the housing by compression.

[0009] Furthermore, the four corners of the shell and the comparison card are all rounded.

[0010] Furthermore, a through circular groove is provided at one corner of the housing; grooves are provided on the housing and near both sides, and anti-slip ridges are arranged in the grooves.

[0011] The advantages of this utility model compared with the prior art are as follows: The comparison card has a shell on the outside, which is pressed tightly against the concrete wall, while the comparison card can slide inside the shell. This eliminates the need for the comparison card to move on rough or damp walls, reducing the risk of damage. It features a circular slot for hanging, making it easy to carry; and a groove to increase hand friction, so that the hands do not have to directly contact rough wall surfaces, improving the convenience and safety of use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a portable concrete crack width comparison and detection tool according to this utility model.

[0013] Figure 2 This is a structural diagram of the shell of a portable concrete crack width comparison and detection tool according to this utility model.

[0014] Figure 3 This is a structural diagram of a comparison card for a portable concrete crack width comparison and detection tool according to this utility model.

[0015] As shown in the figure: 1. Shell, 2. Comparison card, 3. Rectangular groove, 4. Anti-slip pad, 5. Through groove, 6. Comparison strip, 7. Slider, 8. Slide groove, 9. Rectangular plate, 10. Magnifying glass, 11. Circular groove, 12. Groove. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] Example 1, in conjunction with Appendix Figure 1 , 2 A portable concrete crack width comparison and detection tool includes a housing 1, and an anti-slip pad 4 is provided on the bottom surface of the housing 1. In actual use, the housing 1 is pressed tightly against the wall, and the anti-slip pad 4 can improve friction, making the housing 1 less likely to slip and highly stable. Combined with appendix Figure 1 , 2 3. A transparent comparison card 2 is provided inside the shell 1, which can be slid left and right. The transparency makes it easy to compare with the gap. The four corners of the shell 1 and the comparison card 2 are rounded, so they are not easy to be cut by the corners when carrying them and avoid accidental injury. Based on the above structure, a rectangular groove 3 is provided through the middle of the housing 1 to expose the comparison card 2 for crack comparison; a through groove 5 is provided inside the housing 1, which intersects with the rectangular groove 3, and both ends of the comparison card 2 extend from the through groove 5, so that the comparison card 2 can move left and right in the through groove 5; the width of the through groove 5 is greater than that of the rectangular groove 3, so that the upper and lower ends of the comparison card 2 can be restricted by the rectangular groove 3 to prevent it from falling out; Based on the above structure, the comparison card 2 is provided with comparison strips 6 of progressively increasing thickness. By comparing the comparison strips 6 with the crack, the approximate width of the crack can be quickly obtained. A slider 7 is fixedly connected to the comparison card 2, and the housing 1 is provided with a sliding groove 8 that can slide with the slider 7. The slider 7 and the sliding groove 8 can realize the movement of the comparison card 2 on the one hand, and on the other hand, they also restrict the comparison card 2, so that it can only move along the length of the sliding groove 8 to prevent it from falling out. The bottom surface of the slider 7 is in pressure contact with the housing 1, thereby forming a self-limiting position. When there is no external force, the slider 7 is not easy to slide on its own. Combined with appendix Figure 1 , 2 The shell 1 is provided with a rectangular plate 9, and a magnifying glass 10 is provided on the rectangular plate 9; the magnifying glass 10 can help observe the details of the cross section inside the crack, making it easier to determine the nature of the crack. Combined with appendix Figure 1 , 2 The housing 1 has a through-hole circular groove 11 at one corner, which can be hung by a rope for easy carrying; the housing 1 has grooves 12 on both sides, and anti-slip ridges are arranged in the grooves 12 to increase hand friction, so that the hand does not need to directly contact the rough wall surface, thus improving the convenience and safety of use.

[0018] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A portable concrete crack width comparison and detection tool, characterized in that: Includes a housing (1), in which a transparent comparison card (2) is slidably disposed from left to right, and a through rectangular groove (3) is provided in the middle of the housing (1); a through groove (5) is provided in the housing (1) intersecting with the rectangular groove (3), and both ends of the comparison card (2) extend out from the through groove (5); The comparison card (2) is provided with comparison strips (6) of progressively increasing thickness, and a slider (7) is fixedly connected to the comparison card (2). The housing (1) is provided with a sliding groove (8) that can slide and connect with the slider (7). The housing (1) is provided with a rectangular plate (9), and the rectangular plate (9) is provided with a magnifying glass (10).

2. The portable concrete crack width comparison and detection tool according to claim 1, characterized in that: The bottom surface of the housing (1) is provided with an anti-slip pad (4).

3. The portable concrete crack width comparison and detection tool according to claim 1, characterized in that: The width of the through groove (5) is greater than that of the rectangular groove (3).

4. The portable concrete crack width comparison and detection tool according to claim 1, characterized in that: The bottom surface of the slider (7) is in contact with the housing (1) by compression.

5. The portable concrete crack width comparison and detection tool according to claim 1, characterized in that: The four corners of the shell (1) and the comparison card (2) are all rounded.

6. The portable concrete crack width comparison and detection tool according to claim 1, characterized in that: The housing (1) has a through circular groove (11) at one corner; the housing (1) has grooves (12) on both sides, and anti-slip ridges are arranged in the grooves (12).

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