A multi-parameter adjustable concrete crack experimental device

Abstract

The present application relates to a kind of multiple parameter adjustable concrete crack experimental device, including pouring mould, still including with the sliding connection of pouring mould, and with first locking structure Height adjustment support, with the sliding connection of the top beam of height adjustment support and with second locking structure Angle adjusting part and with the crack manufacturing plate of fixed connection of the angle adjusting part.The present application is realized to the accurate, independent control of multiple parameters of crack by simple mechanical adjustment and locking, provides a kind of efficient, reliable and economic solution for the laboratory production of concrete test piece with crack.

Description

Technical Field

[0001] This invention relates to the field of civil engineering material testing technology, specifically a multi-parameter adjustable concrete crack testing device. Background Technology

[0002] In research on the mechanical properties, durability, and crack repair techniques of concrete materials, it is often necessary to prepare concrete specimens with pre-set cracks in the laboratory. Currently, commonly used methods mainly include mechanical loading, chemical corrosion, and environmental cycling.

[0003] Mechanical loading methods (such as using a three-point bending tester): Although they can simulate crack propagation, they rely on expensive high-precision servo equipment and the specimen size is limited; Chemical corrosion method: This method uses solution erosion to generate cracks. It has a long cycle, requires strict environmental control, and the corrosion products can interfere with the original properties of concrete, which poses environmental problems. Environmental cycling methods (such as freeze-thaw cycles) are extremely time-consuming, inefficient, and the formation of cracks is uncertain.

[0004] The aforementioned methods all suffer from high costs, long production cycles, low success rates, or the introduction of interfering factors, which can easily lead to specimen fabrication failures and waste of materials and research funds. Therefore, there is an urgent need for a specialized device that is simple to operate, low in cost, and can stably pre-fabricate cracks with specific parameters. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a concrete crack experimental device with adjustable multi-parameters. This device can reliably pre-fabricate cracks of specific width, angle and depth in concrete specimens to meet the diverse needs of scientific research and teaching experiments.

[0006] Technical solution

[0007] A multi-parameter adjustable concrete crack testing device includes a casting mold, characterized in that it further includes a height adjustment bracket slidably connected to the casting mold and having a first locking structure, an angle adjustment component slidably connected to the top crossbeam of the height adjustment bracket and having a second locking structure, and a crack manufacturing plate fixedly connected to the angle adjustment component.

[0008] Furthermore, the height adjustment bracket includes vertical support members symmetrically fixed at both ends of the top crossbeam, which are slidably connected to the two opposite side walls of the casting mold via a first slide rail structure; The first locking structure includes a screw hole formed on any of the vertical support members and a limiting screw threadedly connected to the screw hole.

[0009] Furthermore, the first slide rail structure includes vertical slide rails formed on the two side walls, and vertical slide grooves formed on the outer surfaces of the two vertical support members facing the side walls. The vertical slide grooves can be fitted onto the vertical slide rails and can slide up and down along the vertical slide rails. The limiting screw can abut against the vertical slide rail to complete the limiting and locking.

[0010] Furthermore, the angle adjustment component consists of a sliding base and an angle adjustment seat hinged to one end of the bottom surface of the sliding base; The second locking structure includes a horizontal slide rail disposed on the bottom surface of the top beam and a horizontal slide groove disposed on the top surface of the sliding base; the horizontal slide groove can be engaged with the horizontal slide rail and can slide left and right along the horizontal slide rail; The crack-making plate is fixed on the angle adjustment seat.

[0011] Furthermore, a horizontal scale is engraved on the horizontal slide rail to indicate the front and rear positions of the crack-making plate.

[0012] Furthermore, a vertical scale is engraved on the crack-making plate to indicate the depth or length of the crack-making plate inserted into the casting mold.

[0013] Furthermore, the sliding base is engraved with an arc angle scale to indicate the tilt angle of the crack-making plate.

[0014] Furthermore, a level bubble is provided at the top of the top beam.

[0015] Beneficial effects: This invention achieves precise and independent control of multiple parameters of cracks through simple mechanical adjustment and locking, providing an efficient, reliable and economical solution for the laboratory preparation of cracked concrete specimens.

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 A schematic diagram of a multi-parameter adjustable concrete crack testing device according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the casting mold structure.

[0019] Figure 3 This is a schematic diagram of the height-adjustable bracket.

[0020] Figure 4 This is a schematic diagram of the angle adjustment component.

[0021] Figure 5 Schematic diagram of the crack manufacturing plate (planar orthographic projection view).

[0022] Explanation of reference numerals in the attached drawings: 1. Casting mold; 101. Side wall; 102. Vertical slide rail; 2. Height adjustment bracket; 201. Top beam; 202. Vertical support; 203. Vertical slide groove; 204. Horizontal slide rail; 205. Level bubble; 206. Limiting screw hole; 3. Angle adjustment component; 301. Sliding base; 302. Angle adjustment seat; 303. Horizontal slide groove; 304. Screw hole; 4. Crack fabrication plate. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments. However, those skilled in the art will understand that the following embodiments are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention.

[0024] Example 1:

[0025] This embodiment provides a multi-parameter adjustable concrete crack testing device, including a casting mold 1, which can be a common rectangular mold. Figure 1 The diagram shows a structure consisting of a rectangular base plate and four vertical plates fixed to the four sides of the rectangular base plate. To simultaneously pre-fabricate cracks of specific width, angle, and depth in concrete specimens, thus meeting the diverse needs of scientific research and teaching experiments, this embodiment is improved in that… Figure 1 The multi-parameter adjustable concrete crack experimental device shown also includes a height-adjusting bracket 2 slidably connected to the casting mold 1 and having a first locking structure, an angle-adjusting component 3 slidably connected to the top crossbeam 201 of the height-adjusting bracket 2 and having a second locking structure, and a crack-making plate 4 (made of engineering plastic, metal, or polymer composite material) fixedly connected to the angle-adjusting component 3. By adjusting the relative distance between the top crossbeam 201 of the height-adjusting bracket 2 and the casting mold 1, the depth of the crack-making plate 4 inserted into the casting mold 1 can be adjusted. Simultaneously, the angle-adjusting component 3 adjusts the tilt angle of the crack-making plate 4, while the thickness of the crack-making plate 4 itself is used to pre-fabricate the width of the crack. This device has a simple structure, is easy to operate, and is inexpensive, making it very suitable for teaching or research needs.

[0026] See Figure 2 It can be further understood that the height adjustment bracket 2 provided in this embodiment includes Figure 2The vertical support members 202 shown are symmetrically fixed at both ends of the top crossbeam 201. The vertical support members 202 are slidably connected to the two opposite side walls 101 of the casting mold 1 through a first slide rail structure. The first locking structure here includes a screw hole opened on any of the vertical support members 202 and a limiting screw threadedly connected to the screw hole. The first slide rail structure includes vertical slide rails 102 formed on two side walls 101, and vertical slide grooves 203 (located on the inner side of the vertical support members 202) formed on the outer surfaces of the two vertical support members 202 facing the side walls 101. The vertical slide grooves 203 can be fitted onto the vertical slide rails 102 and can slide up and down along the vertical slide rails 102. The limiting screws can abut against the vertical slide rails 102 to complete the limiting lock. That is, when the top beam 201 is adjusted to the required height or the required depth of the crack-making plate 4 inserted into the casting mold 1, the limiting screws are manually tightened so that they abut against the vertical slide rails 102 to prevent the height adjustment bracket 2 from sliding down. This is a common limiting method. At this point, the position setting of the height adjustment bracket 2 is completed. Of course, a more intuitive and simple design at this time is to engrave a vertical scale on the crack-making plate 4 to indicate the depth or length of the crack-making plate 4 inserted into the casting mold 1. It should be noted that when the crack-making plate 4 needs to be tilted, a special angle such as 30°, 45° or 60° is generally chosen for easy calculation (of course, the sliding base 301 is engraved with an arc angle scale to indicate the tilt angle of the crack-making plate 4). At this time, the value displayed on the crack-making plate 4 is not its vertical insertion depth into the casting mold 1, but the length of the crack it creates.

[0027] Figure 3 The diagram shows the structure of the angle adjustment component 3, which consists of a sliding base 301 and an angle adjustment seat 302 hinged to one end of the bottom surface of the sliding base 301. The second locking structure includes a horizontal slide rail 204 disposed on the bottom surface of the top beam 201 and a horizontal slide groove 303 disposed on the top surface of the sliding base 301. The horizontal slide groove 303 can be engaged with the horizontal slide rail 204 and can slide left and right along the horizontal slide rail 204. The crack manufacturing plate 4 is fixed on the angle adjustment seat 302 and adjusts its tilt angle synchronously with the angle adjustment seat 302. A horizontal scale is engraved on the horizontal slide rail 204 to indicate the front and rear position of the crack manufacturing plate 4, i.e., to display the position of the crack. An arc angle scale is engraved on the sliding base 301 to indicate the tilt angle of the crack manufacturing plate 4.

[0028] Finally, to ensure accuracy, this embodiment provides a level bubble 205 at the top of the top beam 201 to ensure the horizontality of the angle adjustment component 3 and the left-right symmetry of the two vertical supports 202 of the height adjustment bracket 2.

[0029] In use, first assemble the height adjustment bracket 2 and the angle adjustment component 3 using dovetail guide rails and dovetail groove sliders. That is, the vertical slide rail 102, vertical slide groove 203, horizontal slide rail 204, and horizontal slide groove 303 adopt the commonly used dovetail guide rail and dovetail groove structure. Of course, T-slot guide rails or optical axis guide rails can also be used. Assemble the height adjustment bracket 2 on the casting mold 1 and assemble the angle adjustment component 3 on the top crossbeam 201. Then, fix the crack making plate 4 to the angle adjustment seat 302 with screws. Observe the level bubble 205 on the height adjustment bracket 2 and fine-tune the two vertical support components 202 of the height adjustment bracket 2 to make the entire device horizontal. Finally, tighten the limit screws to complete the assembly.

[0030] Angle Adjustment: The angle adjustment seat 302 and the sliding base 301 are hinged via a damping hinge shaft (damping pivot shaft), facilitating the adjustment of the tilt angle of the angle adjustment seat 302 (e.g., 0°, 30°, 45°, etc.). Before adjusting the tilt angle, the sliding base 301 is first adjusted to the position where the crack needs to be created, and then the tilt angle of the angle adjustment seat 302 is adjusted, thereby completing the tilt angle of the crack-making plate 4 fixed on the angle adjustment seat 302. —The angle adjustment seat 302 and the sliding base 301 can also be hinged using existing industrial hinges with adjustable torque and angle locking function.

[0031] Depth and width adjustment: Select a crack fabrication plate with a thickness equal to the predetermined crack width (various thicknesses of plates can be prepared for backup). Fix it on the angle adjustment seat 302. Adjust the height adjustment bracket 2 up and down so that it is inserted into the casting mold 1 (casting mold) below. Observe its insertion depth through the scale on the crack fabrication plate. When the predetermined depth is reached, lock the height adjustment bracket 2 with the limit screws (which cooperate with the screw hole 206; if necessary, two screw holes 206 can be set on the same vertical support 202, arranged in the vertical direction, and limited by the two limit screws).

[0032] Finally, pour the concrete mixture into the test casting mold 1, vibrate it to compact it, and smooth it. After the concrete has initially set, release each locking mechanism in sequence, and carefully remove the entire device from the concrete specimen, leaving a pre-set crack with a specific width, angle, and depth in the specimen.

[0033] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A multi-parameter adjustable concrete crack testing device, comprising a casting mold (1), characterized in that, It also includes a height adjustment bracket (2) that is slidably connected to the casting mold (1) and has a first locking structure, an angle adjustment member (3) that is slidably connected to the top crossbeam (201) of the height adjustment bracket (2) and has a second locking structure, and a crack manufacturing plate (4) that is fixedly connected to the angle adjustment member (3).

2. The multi-parameter adjustable concrete crack testing device according to claim 1, characterized in that, The height adjustment bracket (2) includes vertical support members (202) symmetrically fixed at both ends of the top crossbeam (201). The vertical support members (202) are slidably connected to the two opposite side walls (101) of the casting mold (1) through a first slide rail structure. The first locking structure includes a screw hole formed on any of the vertical support members (202) and a limiting screw threadedly connected to the screw hole.

3. The multi-parameter adjustable concrete crack testing device according to claim 2, characterized in that, The first slide rail structure includes vertical slide rails (102) formed on the two side walls (101) and vertical slide grooves (203) formed on the outer surfaces of the two vertical support members (202) facing the side walls (101). The vertical slide grooves (203) can be fitted onto the vertical slide rails (102) and can slide up and down along the vertical slide rails (102). The limiting screw can abut against the vertical slide rail (102) to complete the limiting lock.

4. The multi-parameter adjustable concrete crack testing device according to claim 1, characterized in that, The angle adjustment component (3) consists of a sliding base (301) and an angle adjustment seat (302) hinged to one end of the bottom surface of the sliding base (301); The second locking structure includes a horizontal slide rail (204) disposed on the bottom surface of the top crossbeam (201) and a horizontal slide groove (303) disposed on the top surface of the sliding base (301); the horizontal slide groove (303) can be fitted into the horizontal slide rail (204) and can slide left and right along the horizontal slide rail (204); The crack manufacturing plate (4) is fixed on the angle adjustment seat (302).

5. The multi-parameter adjustable concrete crack testing device according to claim 4, characterized in that, A horizontal scale is engraved on the horizontal slide rail (204) to indicate the front and rear positions of the crack manufacturing plate (4).

6. The multi-parameter adjustable concrete crack testing device according to claim 4 or 5, characterized in that, A vertical scale is engraved on the crack manufacturing plate (4) to indicate the depth or length of the crack manufacturing plate (4) inserted into the casting mold (1).

7. The multi-parameter adjustable concrete crack testing device according to claim 4 or 5, characterized in that, The sliding base (301) is engraved with an arc angle scale to indicate the tilt angle of the crack manufacturing plate (4).

8. The multi-parameter adjustable concrete crack testing device according to claim 1, 2, 3, 4, or 5, characterized in that, A level bubble (205) is provided at the top of the top beam (201).

9. The multi-parameter adjustable concrete crack testing device according to claim 6, characterized in that, A level bubble (205) is provided at the top of the top beam (201).

10. The multi-parameter adjustable concrete crack testing device according to claim 7, characterized in that, A level bubble (205) is provided at the top of the top beam (201).

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