A concrete crack width wedge metal calibration gauge

Abstract

The utility model discloses a concrete crack width wedge metal calibration gauge, including a pair of through fixed axle rotation connection's movable link, and the movable link is equipped with the sliding slot of penetration, and the width measuring scale is installed in the slot, and the angle measuring scale, and the sliding slot both sides have the slot of width measuring scale thickness adaptation. The angle measuring scale is arc, through the T type sliding member in the movable slot link sliding slot, and the sliding slot has the through -hole of up and down, and the movable slot has the clamping piece of fixed link of sliding member, and each measuring component has the scale mark outside. The device can measure crack side wall depth, opening width, angle and calculate vertical depth through the cooperation of multiple components, and can also complete installation, measurement and storage in combination with the existing auxiliary tool, solve the problem that traditional device measurement is single, low precision, poor adaptation, and the structure is stable, convenient operation is suitable for concrete structure crack detection.

Description

Technical Field

[0001] This utility model provides a calibration gauge, and particularly relates to a wedge-shaped metal calibration gauge for concrete crack width. Background Technology

[0002] Concrete crack measuring devices are tools used to detect the size parameters of cracks on or inside concrete structures. Their core function is to provide important basis for assessing the safety of concrete structures, judging the development trend of defects, and formulating repair plans by accurately acquiring key data such as crack width, angle, and depth. They are widely used in fields such as building engineering, bridge maintenance, and water conservancy facility inspection.

[0003] Existing common concrete crack measuring devices mostly consist of a single measuring ruler or a simple frame structure. The basic structure usually includes a straight plate-shaped main body and a single scale set on the main body. During measurement, it is necessary to manually hold the device and place it against the crack to take the reading. These devices have obvious shortcomings. Compared with the present application, they lack a movable structure that can rotate to adapt to different crack conditions, cannot flexibly deal with cracks with different opening angles, and have a single measurement function, making it difficult to simultaneously achieve comprehensive measurement of width, angle, and depth. In addition, due to the lack of stable component limiting and installation structure, slippage and displacement are prone to occur during measurement, resulting in low measurement accuracy. They also cannot be stably installed on cracks for continuous or multiple measurements. Utility Model Content

[0004] To address the aforementioned issues, this application provides a concrete crack width wedge-shaped metal calibration gauge, which solves the problems of low accuracy due to the single measurement parameter of traditional devices, inconsistent measurement values ​​on both sides, and the influence of the overlapping thickness of the rods on the measurement results.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a wedge-shaped metal calibration gauge for concrete crack width, including a pair of movable rods, wherein the movable rods are provided with sliding grooves that extend through themselves along the height direction of the movable rods, and the sliding grooves are provided with width measuring rulers and angle measuring rulers respectively;

[0006] The sliding groove has slots on both sides that are connected to itself and pass through the movable rod along the width direction of the movable rod. The slots correspond to the thickness of the width measuring ruler.

[0007] The angle measuring ruler is an arc-shaped rod, and a T-shaped sliding member is connected to the side of the rod near the movable rod through a movable groove.

[0008] Preferably, the pair of movable rods are rotatably connected by a fixed shaft structure, and the upper and lower sides of the sliding groove are provided with through holes communicating with itself; the opening width of the through holes and the slot is smaller than the width of the corresponding side of the sliding groove.

[0009] Preferably, the shape of the movable groove corresponds to the shape of the angle measuring ruler; the interior of the movable groove is provided with a corresponding clip that is fixedly connected to the sliding member.

[0010] Preferably, the sliding member includes a cylindrical body integrally connected to the locking member, and a circular limiting plate integrally connected to the other end of the cylindrical body;

[0011] The diameter of the cylindrical body corresponds to the width of the through hole opening, and the diameter of the circular limiting plate corresponds to the width of the sliding groove.

[0012] Preferably, the movable rod, the width measuring ruler, and the angle measuring ruler are all provided with scale markings on their outer surfaces, which are used to measure the crack sidewall depth, opening width, and opening angle, respectively, and the vertical depth of the crack can be calculated.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages compared with the prior art:

[0014] This device enables omnidirectional measurement of cracks and stable installation within them, achieved through the coordinated operation of its components: a pair of movable rods can rotate via a fixed shaft structure to adapt to cracks with different opening states. After being fitted to both sides of the crack, the slots on both sides of the sliding groove correspond to the thickness of the width measuring ruler. The width measuring ruler can be inserted into the slot and adjusted to the corresponding crack opening, and the crack opening width can be measured using the scale markings on the width measuring ruler; the angle measuring ruler is an arc-shaped rod, which can move within the sliding groove via a T-shaped sliding component connected by a movable groove. The shape of the movable groove corresponds to the angle measuring ruler, and its interior contains components that correspond to the sliding component. The fixed clamps can stably adjust the position of the angle measuring ruler, and the crack opening angle can be measured using the scale markings on its outer surface; the diameter of the cylindrical body of the sliding component corresponds to the width of the through holes on the upper and lower sides of the sliding groove, and the diameter of the circular limiting plate corresponds to the inner width of the sliding groove. With the structure of the through holes and the sliding groove, the position of the relevant components can be fixed. The scale markings on the movable rod can measure the depth of the crack sidewall. Combined with the angle and other data, the vertical depth of the crack can be calculated. The design that the width of the through hole and slot opening is smaller than the width of the corresponding side of the sliding groove can prevent the components from slipping and ensure that the components are stably installed in the crack when they are linked.

[0015] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a wedge-shaped metal calibration gauge for concrete crack width according to the present invention.

[0017] Figure 2This is a three-dimensional schematic diagram of the actual installation of the concrete crack width wedge-shaped metal calibration gauge of this utility model.

[0018] Figure 3 This is an exploded view of the structure of a concrete crack width wedge-shaped metal calibration gauge according to this utility model.

[0019] Figure 4 This is a cross-sectional view of the groove portion of a wedge-shaped metal calibration gauge for concrete crack width according to this utility model.

[0020] As shown in the figure:

[0021] 1. Movable rod; 2. Sliding groove; 3. Width measuring ruler; 4. Angle measuring ruler; 5. Slot; 6. Movable groove; 7. Sliding component; 8. Through hole; 9. Clip; 10. Scale markings. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] like Figure 1 and Figure 2As shown, a concrete crack width wedge-shaped metal calibration gauge includes a pair of movable rods 1. The movable rods 1 have a sliding groove 2 that extends through them along their height direction. The sliding groove 2 has a width measuring ruler 3 and an angle measuring ruler 4 correspondingly arranged inside it. The sliding groove 2 has slots 5 on both sides that are connected to it and extend through the movable rods 1 along their width direction. The thickness of the slots 5 corresponds to that of the width measuring ruler 3. The angle measuring ruler 4 is an arc-shaped rod. On its side near the movable rod 1, a T-shaped sliding member 7 placed inside the sliding groove 2 is connected through a movable groove 6. At the same time, the outer surfaces of the movable rods 1, the width measuring ruler 3, and the angle measuring ruler 4 are all marked with scale marks 10, which are used to measure the crack sidewall depth, opening width, and opening angle, respectively. The vertical depth of the crack can be calculated.

[0026] In this embodiment, a pair of movable rods 1 can rotate relative to each other. The sliding groove 2 provides installation and movement space for the width measuring ruler 3, the angle measuring ruler 4 and the slider 7. The width measuring ruler 3 achieves stable insertion and positioning through the adaptation with the slot 5. The angle measuring ruler 4 flexibly adjusts its position in the sliding groove 2 with the help of the movable groove 6 and the slider 7. The slider 7 restricts the movement trajectory of the angle measuring ruler 4. The scale mark 10 directly provides measurement data. From the perspective of implementation, the various components are linked through the cooperation of the groove and the connecting parts, making installation convenient and operation flexible, and able to quickly adapt to different crack conditions. From the perspective of innovation, this combination breaks through the limitations of traditional single measurement structures. The rotation design of the movable rod 1 can adapt to cracks with different opening angles. The cooperation between the sliding groove 2 and each measuring scale allows for multi-parameter measurement to be achieved in the same device. The thickness of the slot 5 and the width measuring scale 3 correspond to ensure the stability during measurement. The arc design of the angle measuring scale 4 and its connection with the sliding part 7 make the angle measurement more accurate. The separate setting of the scale markings 10 meets the measurement needs of different parameters. The coordinated structure solves the problems of single measurement, poor adaptability and insufficient accuracy of traditional devices, realizing comprehensive multi-parameter measurement of cracks and ensuring the stability and accuracy of the measurement process.

[0027] like Figure 3 and Figure 4 As shown, in this calibration gauge, a pair of movable rods 1 are rotatably connected by a fixed shaft structure. The upper and lower sides of the sliding groove 2 are provided with through holes 8 that communicate with itself, and the opening widths of the through holes 8 and the slots 5 are both smaller than the width of the corresponding side of the sliding groove 2. The shape of the movable groove 6 corresponds to the shape of the angle measuring ruler 4, and a corresponding clip 9 is provided inside it that is fixedly connected to the sliding member 7. The sliding member 7 includes a cylindrical body that is integrally connected to the clip 9, and a circular limiting plate is integrally connected to the other end of the cylindrical body. The diameter of the cylindrical body corresponds to the opening width of the through hole 8, and the diameter of the circular limiting plate corresponds to the internal width of the sliding groove 2.

[0028] In this embodiment, the fixed shaft structure provides a stable fulcrum for the relative rotation of the movable rod 1, ensuring the regularity of its rotation process; the through hole 8 is adapted to the cylindrical body of the sliding member 7, providing a channel for the movement of the sliding member 7 and forming a limit with the circular limiting plate. Since the diameter of the circular limiting plate corresponds to the internal width of the sliding groove 2 and the opening width of the through hole 8 is smaller than the width of the corresponding side of the sliding groove 2, it can prevent the sliding member 7 from falling out of the sliding groove 2; the movable groove 6 corresponds to the shape of the angle measuring ruler 4, and combined with the internal locking piece 9, it can ensure that the angle measuring ruler 4 always maintains a trajectory that adapts to its own arc shape when moving with the sliding member 7, avoiding deviation; the fixed connection between the locking piece 9 and the sliding member 7 and the integrated structure of the sliding member 7 enhance the stability of the component connection and reduce loosening errors during measurement. From the perspective of implementation, these structural designs achieve precise positioning through size adaptation and shape correspondence, thereby improving the overall structural stability of the device. From the perspective of innovation, the fixed shaft structure makes the rotation of the movable rod 1 more reliable, the cooperation between the through hole 8 and the sliding part 7 cleverly solves the problem of preventing the parts from falling off during movement, and the setting of the movable groove 6 and the clamp 9 further ensures the accurate trajectory of angle measurement, effectively making up for the defects of traditional device parts being easy to loosen and easy to misalign during movement, so that the device can still maintain stable measurement performance in long-term use and complex crack measurement.

[0029] When using this device, its usage can be classified according to crack morphology, differences in measurement parameters, etc. The corresponding calculation formulas and derivation processes are as follows.

[0030] A. The sidewall depths measured by the movable rods on both sides of the crack are consistent.

[0031] Given: L1 = L2 = L (sidewall depth) W (crack opening width) θ (angle) Premise: The influence of the overlapping thickness of the bars can be ignored.

[0032] 1.1 Vertical Depth

[0033] HH=L cos(θ / 2)–(W / 2)tan(θ / 2)

[0034] 1.2 Derivation Process

[0035] Treating the depth of a single sidewall as an inclined edge, its vertical projection is L cos(θ / 2). The vertical compensation corresponding to the horizontal length of half the crack opening width is (W / 2)tan(θ / 2). The difference between the two is the vertical depth H.

[0036] B. The depths of the two sidewalls are inconsistent, and the overlap thickness needs to be considered.

[0037] Given: L1 (depth of the left sidewall), L2 (depth of the right sidewall), W (width of the crack opening), ΔW (horizontal compensation for overlapping thickness), θ (angle).

[0038] 2.1 Vertical Depth

[0039] HH=[(L1+L2) / 2]cos(θ / 2)–[(W–ΔW) / 2]tan(θ / 2)

[0040] 2.2 Derivation Process

[0041] First, take the arithmetic mean of the vertical projections of the depths of the two side walls: [(L1+L2) / 2]cos(θ / 2).

[0042] Then, calculate the vertical compensation amount [(W–ΔW) / 2]tan(θ / 2) using half of the effective opening width after deducting the overlap thickness compensation. The difference between the two is the vertical depth H.

[0043] C. Theoretical volume of the crack, V

[0044] Given: H (maximum vertical depth obtained using the corresponding formula above), W (maximum opening width), L (crack length).

[0045] 3.1 Volume

[0046] VV = (1 / 2) × W × H × L (length)

[0047] 3.2 Derivation Process

[0048] The cross-section at the maximum crack is approximated as a triangle, with an area of ​​(1 / 2)×W×H. Multiplying this area by the crack extension length gives the theoretical volume V.

[0049] In practical use, this device needs to be used in conjunction with several existing devices and technologies to ensure efficient and accurate measurement. For example, a handheld magnifying glass is needed to assist in reading the minute values ​​marked on the movable rod, width measuring ruler, and angle measuring ruler, especially when the crack size is small, to avoid reading errors. A level is needed to calibrate the contact angle between the movable rod and the crack surface to ensure the accuracy of the sidewall depth measurement benchmark. If it is necessary to record measurement data and perform subsequent formula calculations, a portable data logger can be used to achieve real-time storage and automatic calculation of measurement parameters, reducing errors in manual recording and calculation. In addition, before measuring cracks on rough concrete surfaces, a small brush may be needed to clean the dust and debris inside the cracks to prevent impurities from affecting the contact between the measuring rulers and the cracks. In terms of material selection, to ensure the wear resistance and structural stability of the device, the movable rod can be made of No. 45 steel, whose high strength can meet the anti-deformation requirements during long-term use; the width measuring ruler and angle measuring ruler are made of 304 stainless steel, which has both corrosion resistance and high-precision machining performance, ensuring the clarity and durability of the scale markings; the cylindrical body of the sliding part and the circular limit plate can be made of polytetrafluoroethylene, which has a low coefficient of friction, reducing the resistance when the sliding part moves in the sliding groove, and avoiding wear caused by metal-to-metal friction; the fixed shaft structure can be made of chromium-molybdenum steel, whose excellent toughness and fatigue resistance can ensure the reliability of the long-term rotational connection of the movable rod; the clamp can be made of nylon 66, which can buffer the impact force when the angle measuring ruler moves while ensuring the connection strength, protecting the arc structure of the angle measuring ruler from damage.

[0050] Specifically, in the actual implementation of this device, during the installation phase, a small bench vise from existing technology can be used to assist in fixing the movable rod. First, adjust the opening of the bench vise to a size suitable for the width of the movable rod, gently clamp the non-measuring end of the movable rod, and then adjust the initial included angle between the two movable rods to be close to the estimated opening angle of the crack through the fixed shaft structure to avoid installation deviations caused by manual support. Before measurement, if there are small protrusions on the concrete surface that affect the fit of the movable rod, fine sandpaper can be used to lightly grind the protrusions. When grinding, use a clockwise circular motion, and control the force to remove only the protrusions without damaging the concrete substrate, ensuring that the movable rod fits tightly against the crack surface. When installing the width measuring ruler, a ruler from existing technology is needed to calibrate the parallelism between the width measuring ruler and the movable rod. Place the side of the ruler against the outer wall of the movable rod and adjust the position of the width measuring ruler until its edge is completely aligned with the side of the ruler. Align the parts and insert them into the slots to ensure accurate measurement direction. If the angle measuring ruler gets stuck during the angle measurement process, use silicone-based lubricant to lubricate the cylindrical body surface of the sliding part. When lubricating, first drip the lubricant onto a clean cotton cloth, then gently wipe the cylindrical body with the cloth to avoid the lubricant seeping into the sliding groove and contaminating the scale markings. After the measurement is completed, use anti-rust spray to treat the metal parts such as the moving rod and fixed shaft structure. When spraying, keep the nozzle 30cm away from the surface of the parts and spray a layer evenly. At the same time, disassemble the width measuring ruler and angle measuring ruler and put them into the custom foam storage box. The storage box has grooves that are pre-set to fit the shape of each part to prevent the parts from being damaged by collision during storage. By connecting these existing technical means, a complete operation process from installation and measurement to storage is formed, further ensuring the rationality and stability of the use of this device.

[0051] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A wedge-shaped metal calibration gauge for concrete crack width, comprising a pair of movable rods (1), characterized in that: The movable rod (1) has a sliding groove (2) that runs through it along the height direction of the movable rod (1), and the sliding groove (2) is provided with a width measuring ruler (3) and an angle measuring ruler (4) respectively. The sliding groove (2) has slots (5) on both sides that are connected to itself and pass through the movable rod (1) along the width direction of the movable rod (1). The slots (5) correspond to the thickness of the width measuring ruler (3). The angle measuring ruler (4) is an arc-shaped rod, and a T-shaped sliding member (7) placed inside the sliding groove (2) is connected to the side of the rod close to the movable rod (1) through the movable groove (6).

2. The concrete crack width wedge-shaped metal calibration gauge according to claim 1, characterized in that: The pair of movable rods (1) are rotatably connected by a fixed shaft structure. The upper and lower sides of the sliding groove (2) are provided with through holes (8) that communicate with itself. The opening width of the through holes (8) and the slot (5) is smaller than the width of the corresponding side of the sliding groove (2).

3. The concrete crack width wedge-shaped metal calibration gauge according to claim 2, characterized in that: The shape of the movable groove (6) corresponds to the shape of the angle measuring ruler (4); the interior of the movable groove (6) is provided with a clip (9) that is fixed to the sliding member (7).

4. A concrete crack width wedge-shaped metal calibration gauge according to claim 3, characterized in that: The sliding member (7) includes a cylindrical body integrally connected to the locking member (9), and a circular limiting plate integrally connected to the other end of the cylindrical body; The diameter of the cylindrical body corresponds to the opening width of the through hole (8), and the diameter of the circular limiting plate corresponds to the inner width of the sliding groove (2).

5. A concrete crack width wedge-shaped metal calibration gauge according to claim 1, characterized in that: The outer surfaces of the movable rod (1), the width measuring ruler (3), and the angle measuring ruler (4) are all marked with scale marks (10), which are used to measure the depth of the crack sidewall, the opening width, and the opening angle, respectively, and the vertical depth of the crack can be calculated.

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