Auxiliary line drawing tool for detecting concrete strength through rebound method

Abstract

The utility model discloses an auxiliary line drawing tool for detecting concrete strength by a rebound method, which comprises a bracket, the bracket is of a right-angle turning edge structure, one end of the bracket is connected with a roller, and the other end of the bracket is connected with a handle; a rotating shaft is connected to the center of the interior of the roller and connected with the support through a rotating bearing. At least two transverse flexible raised lines are distributed on the surface of the roller at equal intervals along the circumference, and at least two annular flexible raised lines are arranged on the surface of the roller at equal intervals in the transverse direction; an ink storage cavity is arranged in the roller, and ink is arranged in the ink storage cavity. The four transverse flexible protruding strips are matched with the four annular flexible protruding strips to roll on the surface of concrete in the direction of the handle, and standard checks are rapidly drawn. Compared with manual hand drawing, the working efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete strength testing tools, and in particular to an auxiliary line drawing tool for testing concrete strength using the rebound method. Background Technology

[0002] According to the technical specifications for testing the compressive strength of concrete using the rebound method, the following requirements should be met for individual component testing: For general components, the number of test zones should not be less than 10. When the number of tested components is greater than 30 and it is not necessary to provide the estimated strength of individual components, or when the dimension of the tested component in one direction is not greater than 4.5m and the dimension in another direction is not greater than 0.3m, the number of test zones for each component can be appropriately reduced, but should not be less than 5. Sixteen rebound values ​​should be read in each test zone, and the rebound value reading at each measuring point should be accurate to 1. Measuring points should preferably be evenly distributed within the test zone, and the net distance between two adjacent measuring points should not be less than 20mm. Therefore, each concrete component must have 10 test zones, and each test zone must have 16 measuring points.

[0003] In modern engineering, concrete is used in an increasing number of applications, requiring a significant number of inspection sites. Common inspection sites include concrete beams, columns, walls, and slabs. The conventional practice for inspectors is to use markers, chalk, and other drawing tools to create a grid of test areas for rebound testing. However, this method often results in rough, uneven grids of varying sizes, leading to a large workload, time-consuming and labor-intensive work. Furthermore, drawing on high surfaces like beams and columns is difficult and carries a high risk of falling. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an auxiliary drawing tool for testing the strength of concrete by rebound method in order to overcome the shortcomings of the existing technology.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an auxiliary drawing tool for testing the strength of concrete by rebound method, including a bracket, the bracket having a right-angle bend structure, one end of the bracket being connected to a roller, and the other end of the bracket being connected to a handle;

[0006] The roller has a centrally connected shaft inside, and the shaft is connected to the bracket via a rotating bearing.

[0007] The roller surface is provided with at least two transverse flexible protrusions distributed at equal intervals around the circumference, and the roller surface is provided with at least two circumferential flexible protrusions distributed at equal intervals in the transverse direction.

[0008] The roller has an ink storage chamber inside, and the ink storage chamber contains ink.

[0009] By employing the above technical solution, four transverse flexible convex strips, in conjunction with four circumferential flexible convex strips, roll along the handle direction on the concrete surface to quickly draw standard squares. Compared to manual hand-drawing, this greatly improves work efficiency.

[0010] Furthermore, the transverse flexible protrusion and the circumferential flexible protrusion described in this utility model are made of ink-permeable material;

[0011] By adopting the above technical solution, ink is dispersed through flexible convex strips when the roller rolls.

[0012] Furthermore, the present invention comprises four transverse flexible protrusions and four circumferential flexible protrusions.

[0013] Furthermore, the roller of this invention is provided with an ink storage cover on its side, and ink can only be added after the ink storage cover is opened; the ink storage cavity is provided with an ink-absorbing material, which can make the ink spread more evenly.

[0014] Furthermore, the end of the handle described in this utility model is connected to a telescopic extension rod via a built-in threaded hole.

[0015] Furthermore, the lateral length of the roller described in this invention is equal to its own perimeter, ensuring that the drawn outline is a square.

[0016] Furthermore, the roller of this utility model is also provided with a semi-cylindrical fixed outer shell, and a semi-cylindrical cover is snapped onto the semi-cylindrical fixed outer shell, which is detachable.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model discloses an auxiliary drawing tool for testing concrete strength using the rebound method. Inspired by a roller brush, it incorporates four transverse flexible convex strips and four circumferential flexible convex strips, which roll along the handle direction on the concrete surface to quickly draw standard squares. Compared to manual hand-drawing, this significantly improves work efficiency.

[0019] 2. Built-in ink reservoir, one ink filling allows for long-term use, and ink can be refilled at any time when the ink level is low;

[0020] 3. The design features an openable semi-cylindrical cap that, when locked in place, prevents ink from evaporating or solidifying when not in use.

[0021] 4. An extended telescopic pole can be installed to easily handle inspections of high-altitude areas such as the top of beams and columns, eliminating the need for inspection personnel to climb to draw diagrams and reducing the risk of falls. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is another structural view of the roller in this utility model;

[0025] Figure 3 This is a schematic diagram of the survey area grid drawn using the auxiliary line drawing tool of this utility model.

[0026] The following are labeled in the diagram: 1. Bracket, 2. Roller, 3. Handle, 4. Rotating shaft, 5. Horizontal flexible convex strip, 6. Circumferential flexible convex strip, 7. Ink reservoir cover, 8. Telescopic extension rod, 9. Cylindrical fixed outer shell, 10. Semi-cylindrical cover, 11. Grid of the test area. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] like Figures 1-3 The auxiliary line drawing tool shown is used for testing the strength of concrete by the rebound method. It includes a bracket 1, which has a right-angle bend structure. One end of the bracket 1 is connected to a roller 2, and the other end of the bracket 1 is connected to a handle 3.

[0029] A rotating shaft 4 is connected to the center of the inside of the roller 2, and the rotating shaft 4 is connected to the bracket 1 through a rotating bearing;

[0030] At least two transverse flexible protrusions 5 are equidistantly distributed on the surface of the roller 2, and at least two circumferential flexible protrusions 6 are equidistantly distributed on the surface of the roller 2 in the transverse direction.

[0031] The roller 2 has an ink storage chamber inside, which contains ink.

[0032] The transverse flexible ridge 5 and the circumferential flexible ridge 6 are made of ink-permeable material. There are four transverse flexible ridges 5 and four circumferential flexible ridges 6.

[0033] The side end of the roller 2 is also provided with an ink storage cover 7, and the ink storage cavity is provided with ink-absorbing material.

[0034] The end of the handle 3 is connected to a telescopic extension rod 8 via a built-in threaded hole.

[0035] The lateral length of roller 2 is equal to its own circumference.

[0036] The roller 2 is also provided with a semi-cylindrical fixed housing 9, and a semi-cylindrical cover 10 is snapped onto the semi-cylindrical fixed housing 9.

[0037] Working principle:

[0038] When using, remove the semi-cylindrical cover to expose half of the roller. Hold the handle and apply pressure to the concrete surface to roll the roller. As the roller rolls, the ink is evenly distributed through the horizontal flexible convex strips to draw the grid 11 of the test area. For high locations such as beams and columns, a telescopic extension rod can be connected below the handle. After use, cover the removable outer shell to ensure that the ink does not evaporate and solidify.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An auxiliary line-drawing tool for testing concrete strength using the rebound method, characterized in that: Includes a bracket (1), which has a right-angle bend structure. One end of the bracket (1) is connected to a roller (2), and the other end of the bracket (1) is connected to a handle (3). The roller (2) has a rotating shaft (4) connected to its center, and the rotating shaft (4) is connected to the bracket (1) through a rotating bearing; The roller (2) has at least two transverse flexible protrusions (5) evenly distributed around the circumference, and the roller (2) has at least two circumferential flexible protrusions (6) evenly distributed in the transverse direction. The roller (2) has an ink storage chamber inside, and the ink storage chamber contains ink.

2. The auxiliary marking tool for testing concrete strength using the rebound method as described in claim 1, characterized in that: The transverse flexible protrusion (5) and the circumferential flexible protrusion (6) are made of ink-permeable material.

3. The auxiliary marking tool for testing concrete strength using the rebound method as described in claim 1, characterized in that: The number of the transverse flexible protrusions (5) and the circumferential flexible protrusions (6) are both four.

4. The auxiliary marking tool for testing concrete strength using the rebound method as described in claim 1, characterized in that: The roller (2) is also provided with an ink storage cover (7) on its side, and the ink storage cavity is provided with an ink-absorbing material.

5. The auxiliary marking tool for testing concrete strength using the rebound method as described in claim 1, characterized in that: The end of the handle (3) is connected to a telescopic extension rod (8) through a built-in threaded hole.

6. The auxiliary marking tool for testing concrete strength using the rebound method as described in claim 1, characterized in that: The lateral length of the roller (2) is equal to its own circumference.

7. The auxiliary marking tool for testing concrete strength using the rebound method as described in claim 1, characterized in that: The roller (2) is also provided with a semi-cylindrical fixed shell (9), and a semi-cylindrical cover (10) is snapped onto the semi-cylindrical fixed shell (9).

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