Concrete crack self-healing testing device

Abstract

The utility model discloses a concrete crack self-healing testing device which comprises a bottom plate, testing boxes fixedly connected to the top end of the bottom plate at equal intervals and drainage pipes fixedly connected to the lower ends of the front faces of the testing boxes, box covers movably connected to the top ends of the testing boxes, and supporting blocks fixedly connected to the top ends of flow guide plates. A concrete test block is movably connected to the inner wall of the supporting block, a fixed clamping seat is fixedly connected to the inner wall of the test box, a movable clamping seat is movably connected to the other end of the inner wall of the test box, and an osmometer is arranged on the front face of the test box. The concrete test block can be conveniently and quickly clamped and fixed through the clamping assembly, the movable clamping seat, the fixed clamping seat and the supporting block, the whole disassembly and assembly process is very convenient, the concrete test block is arranged in the test box, the leakage of pressurized water caused by the reduction of sealing performance due to production errors of the concrete test block and the like can be avoided, and the test efficiency is improved. And the constant pressure of water is ensured, so that the precision of subsequent test operation is improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete crack self-healing detection technology, specifically a concrete crack self-healing testing device. Background Technology

[0002] Concrete crack self-healing refers to the process by which concrete can automatically repair cracks through internal mechanisms or external intervention after cracks appear. This technology can not only extend the service life of concrete structures, but also reduce maintenance costs and environmental pollution. In order to better study its self-healing effect, corresponding testing equipment is needed to help staff to study and understand it.

[0003] A search revealed an existing patent (publication number: CN222353745U) that discloses a testing device for the self-healing performance of concrete with different crack widths, belonging to the field of concrete material testing technology. Its technical solution includes: multiple sets of concrete specimens with different crack widths, a cavity sealing the cracks, and a pressurized water injection mechanism capable of injecting high-pressure water into the cavity; the concrete specimens have grooves, and the cracks are arranged within the grooves. The beneficial effects of this invention are: it can effectively measure the change in permeability of concrete with different crack widths over time; this device can effectively compare the repair effects of concrete structures that have undergone self-healing with different crack widths, which is helpful for studying the mechanism of self-healing of concrete cracks by permeable crystalline materials.

[0004] However, the above-mentioned method is cumbersome and inconvenient for installing and fixing concrete specimens. It requires tightening multiple sets of bolts and screws to complete the disassembly and assembly. At the same time, factors such as production errors of concrete specimens make it difficult to ensure the sealing between the waterproof silicone rubber and the concrete specimen. Under high water pressure, leakage is likely to occur at the contact surface between the two, which will affect the measurement accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a concrete crack self-healing testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a concrete crack self-healing testing device, comprising a base plate, a controller fixedly connected to one side of the top of the base plate, test boxes fixedly connected at equal intervals to the top of the base plate, a connecting pipe fixedly connected to the back of the test box, a pressure pipe fixedly connected to the middle position of the back of the connecting pipe, a drain pipe fixedly connected to the lower end of the front of the test box, an installation groove opened at the top of the test box, a box cover movably connected to the top of the test box, a guide plate fixedly connected to the inner bottom wall of the test box, and fixing bolts movably connected to both sides of the top of the box cover, penetrating the box cover;

[0007] A support block is fixedly connected to the top of the guide plate, and a concrete test block is movably connected to the inner wall of the support block. A fixed clamp is fixedly connected to the inner wall of the test chamber, and a movable clamp is movably connected to the other end of the inner wall of the test chamber. A connecting hose is fixedly connected to one side of the movable clamp, and one end of the connecting hose is fixedly connected to an extension extending to the outside of the test chamber. A piezometer is installed on the front of the test chamber, and one end of the piezometer is connected to one end of the connecting hose. A clamping assembly is installed on the test chamber to realize the sliding adjustment of the movable clamp.

[0008] Furthermore, the clamping assembly includes a fixing groove, which is formed at the upper end of the inner wall of the test chamber. A sealing seat is fixedly connected to the inner wall of the fixing groove. A threaded rod is rotatably connected between the inner wall of the fixing groove and one end of the sealing seat. A threaded block is threadedly connected to the surface of the threaded rod. One side of the threaded block is fixedly connected to the surface of the movable clamp. A rotating handle is damped and rotatably connected to one side of the front of the fixing bolt. One end of the rotating handle is fixedly connected to one end of the threaded rod.

[0009] Furthermore, a sliding groove is provided at the upper end of the inner wall of the fixing bolt, and a slider that slides in cooperation with the inside of the sliding groove is fixedly connected to one side of the surface of the movable clamp.

[0010] Furthermore, the inner walls of the movable clamp and the fixed clamp are fixedly connected with sealing rings, and the sealing rings are O-shaped.

[0011] Furthermore, the support block is U-shaped and is symmetrically distributed on both sides of the concrete test block.

[0012] Furthermore, the test box has bolt holes on both sides of its top end that are threaded to the bottom of the fixing bolts.

[0013] Furthermore, the surface of the fixing bolt nut is provided with anti-slip textures at equal angles, and the anti-slip textures are arc-shaped.

[0014] Furthermore, a sealing gasket is fixedly connected to the lower end of the surface of the box cover, and the cross-sectional area of ​​the sealing gasket is equal to the cross-sectional area of ​​the opening inside the mounting groove.

[0015] Furthermore, the top of the guide plate has an inclination angle of ten degrees with the horizontal direction, and the shape of the guide plate is a right triangle.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model first places a concrete test block on the inner top wall of a support block. Then, the movable clamping seat is slidable by the clamping assembly, thereby locking the movable clamping seat onto one end of the concrete test block. Pushing it forward, the other end of the concrete test block is locked into the fixed clamping seat. Thus, the two ends of the concrete test block are quickly clamped and fixed by the movable and fixed clamping seats. A sealing ring is set to improve the sealing between the two ends of the concrete test block and the movable and fixed clamping seats respectively, realizing the rapid clamping and fixing of the concrete test block. This avoids the cumbersome and inconvenient disassembly and assembly of traditional concrete test blocks. At the same time, the use of a piezometer and a connecting hose facilitates the detection of the permeability of cracks on the surface of the concrete test block. Furthermore, the test effect of self-healing of concrete cracks can be studied and compared by using three concrete test blocks, thus improving its practicality.

[0018] 2. This utility model achieves a secure installation between the lid and the top of the test chamber by snapping the lid into the mounting groove and using the threaded engagement of the fixing bolts and bolt holes. A sealing gasket enhances the sealing performance of the lid and the mounting groove, preventing water leakage inside the test chamber during testing. Furthermore, the lid and test chamber form a closed space that does not contact the concrete test block, thus avoiding water leakage caused by poor sealing of the waterproof silicone rubber contact surface due to manufacturing errors in the concrete test block. This ensures constant pressure on the concrete test block and guarantees testing accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front perspective view of a concrete crack self-healing testing device according to the present invention.

[0021] Figure 2 This is an exploded perspective view of the cover and test chamber of this utility model;

[0022] Figure 3 This is a three-dimensional cross-sectional view of the test box of this utility model;

[0023] Figure 4 This is a top sectional perspective view of the test box of this utility model;

[0024] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0025] Figure 6 This utility model Figure 3Enlarged structural diagram at point B.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Connecting pipe; 2. Pressurizing pipe; 3. Box cover; 4. Fixing bolt; 5. Base plate; 6. Controller; 7. Test box; 8. Drain pipe; 9. Clamping assembly; 901. Rotary handle; 902. Slide groove; 903. Slider; 904. Fixing groove; 905. Threaded block; 906. Threaded rod; 907. Sealing seat; 10. Piezometer; 11. Movable clamp; 12. Concrete test block; 13. Fixed clamp; 14. Mounting groove; 15. Sealing gasket; 16. Guide plate; 17. Support block; 18. Connecting hose; 19. Anti-slip texture; 20. Bolt hole; 21. Sealing ring. Detailed Implementation

[0028] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] like Figures 1 to 6 As shown, a concrete crack self-healing testing device according to the first aspect of this utility model includes a base plate 5, a controller 6 fixedly connected to one side of the top of the base plate 5, test boxes 7 fixedly connected at equal intervals to the top of the base plate 5, a connecting pipe 1 fixedly connected to the back of the test box 7, a pressure pipe 2 fixedly connected to the middle position of the back of the connecting pipe 1, a drain pipe 8 fixedly connected to the lower end of the front of the test box 7, an installation groove 14 opened at the top of the test box 7, a box cover 3 movably connected to the top of the test box 7, a guide plate 16 fixedly connected to the inner bottom wall of the test box 7, and a top of the guide plate 16... A support block 17 is fixedly connected to one end of the test chamber 7. A concrete test block 12 is movably connected to the inner wall of the support block 17. A fixed clamp 13 is fixedly connected to the inner wall of the test chamber 7. A movable clamp 11 is movably connected to the other end of the inner wall of the test chamber 7. A connecting hose 18 is fixedly connected to one side of the movable clamp 11. One end of the connecting hose 18 is fixedly connected to the outside of the test chamber 7. A piezometer 10 is provided on the front of the test chamber 7. One end of the piezometer 10 is connected to one end of the connecting hose 18. A clamping assembly 9 is provided on the test chamber 7. The clamping assembly 9 is used to realize the sliding adjustment of the movable clamp 11.

[0031] The clamping assembly 9 includes a fixing groove 904, which is located at the upper end of the inner wall of the test chamber 7. A sealing seat 907 is fixedly connected to the inner wall of the fixing groove 904. A threaded rod 906 is rotatably connected between the inner wall of the fixing groove 904 and one end of the sealing seat 907. A threaded block 905 is threadedly connected to the surface of the threaded rod 906. One side of the threaded block 905 is fixedly connected to the surface of the movable clamp 11. A rotating handle 901 is damped and rotatably connected to one side of the front of the fixing bolt 4. One end of the rotating handle 901 is fixedly connected to one end of the threaded rod 906.

[0032] By rotating the handle 901, the threaded rod 906 is rotated, causing the threaded block 905 to slide and drive the movable clamp 11 to slide. This causes the movable clamp 11 to engage with one end of the concrete specimen 12 and push forward, causing the other end of the concrete specimen 12 to engage with the inside of the fixed clamp 13. Thus, the movable clamp 11 and the fixed clamp 13 quickly clamp and fix both ends of the concrete specimen 12.

[0033] In this embodiment, a groove 902 is provided at the upper end of the inner wall of the fixing bolt 4, and a slider 903 is fixedly connected to one side of the surface of the movable clamp 11, which slides in cooperation with the inside of the groove 902. The sliding of the slider 903 inside the groove 902 improves the smoothness of the sliding of the movable clamp 11.

[0034] In this embodiment, a sealing ring 21 is fixedly connected to the inner wall of the movable clamp 11 and the fixed clamp 13. The sealing ring 21 is O-shaped. The O-shaped sealing ring 21 is used to improve the sealing performance of the two ends of the concrete test block 12 after it is engaged with the inner wall of the movable clamp 11 and the fixed clamp 13, so as to ensure the accuracy of subsequent tests.

[0035] In this embodiment, the support block 17 is U-shaped and is symmetrically distributed on both sides of the concrete test block 12. The U-shaped support block 17 facilitates the support of the concrete test block 12.

[0036] Example 2

[0037] like Figures 1 to 6 As shown, a concrete crack self-healing test device includes all the contents of Embodiment 1. The top two sides of the box cover 3 are movably connected with fixing bolts 4 that penetrate the box cover 3. The top two sides of the test box 7 are provided with bolt holes 20 that are threaded to the bottom of the fixing bolts 4.

[0038] By snapping the cover 3 into the mounting groove 14 and then tightening the fixing bolt 4 to make it screw into the bolt hole 20, a firm installation between the cover 3 and the top of the test chamber 7 is achieved. The sealing gasket 15 is used to improve the sealing performance of the cover 3 and the mounting groove 14, so as to avoid water leakage inside the test chamber 7 during testing.

[0039] In this embodiment, the surface of the fixing bolt 4 nut is provided with anti-slip textures 19 at equal angles. The anti-slip textures 19 are arc-shaped. The arc-shaped anti-slip textures 19 improve the ease of rotation of the user's fingers on the surface of the fixing bolt 4 nut.

[0040] In this embodiment, a sealing gasket 15 is fixedly connected to the lower end of the surface of the cover 3. The cross-sectional area of ​​the sealing gasket 15 is equal to the cross-sectional area of ​​the opening inside the mounting groove 14. The sealing gasket 15 is used to improve the sealing performance between the lower end of the cover 3 and the mounting groove 14 after they are engaged and installed, thus preventing water leakage inside the test chamber 7 during testing.

[0041] In this embodiment, the top of the guide plate 16 is tilted at an angle of 10 degrees to the horizontal direction, and the shape of the guide plate 16 is a right triangle. By using the tilted guide plate 16, it is convenient that after the test is completed, the water inside the test chamber 7 can be discharged more quickly through the drain pipe 8 after the valve on the drain pipe 8 is opened.

[0042] The working principle of this practical application is as follows: Two concrete test blocks 12 are sprayed with a curing agent on their surface cracks and cured for a period of time. The two concrete test blocks 12 are coated with different curing agents, while the third is left untreated as a test criterion. Then, the three concrete test blocks 12 are placed sequentially on the inner top wall of the support block 17 inside the three test chambers 7. The rotating handle 901 drives the threaded rod 906 to rotate. The threaded engagement between the threaded rod 906 and the threaded block 905 causes the threaded block 905 to slide, which in turn causes the movable clamp 11 to slide. This causes the movable clamp 11 to engage with one end of the concrete test block 12 and push forward, causing the other end of the concrete test block 12 to engage with the fixed clamp 13. Thus, the movable clamp 11 and the fixed clamp 13 quickly clamp and fix both ends of the concrete test block 12. Simultaneously, the O-ring 21 improves the sealing performance of the concrete test block 12 after engagement with the inner walls of the movable clamp 11 and the fixed clamp 13, ensuring the accuracy of subsequent tests.

[0043] Then, by snapping the cover 3 into the mounting groove 14 and tightening the fixing bolt 4 to screw it into the bolt hole 20, a firm installation between the cover 3 and the top of the test box 7 is achieved. The sealing gasket 15 is used to improve the sealing between the cover 3 and the mounting groove 14, so as to avoid water leakage inside the test box 7 during testing.

[0044] Then, the output end of the pressure pump is connected to the pressure pipe 2, the valve on the pressure pipe 2 is opened, and water is pumped into the pressure pipe 2 through the pressure pump. Then, it is pumped into the test chamber 7 through the connecting pipe 1. When the water is full, the valve on the pressure pipe 2 and the pressure pump are closed. During the test, some water enters the through hole inside the concrete test block 12 through the cracks on the concrete test block 12, and is then pumped to the piezometer 10 through the connecting hose 18. The water pressure change is then measured by three piezometers 10. The values ​​measured by the piezometer 10 at the concrete test block 12 with the curing agent are compared with the values ​​measured by the piezometer 10 at the concrete test block 12 without the curing agent to determine the self-healing effect of the corresponding concrete test block 12.

[0045] After the test is completed, the fixing bolts 4 can be loosened, and the lid 3 can be opened by the handle on the lid 3 to make it easy to take out the concrete test block 12 for replacement, and open the valve on the drain pipe 8 to drain the water inside the test box 7.

Claims

1. A self-healing testing device for concrete cracks, comprising a base plate (5), characterized in that: A controller (6) is fixedly connected to one side of the top of the base plate (5). Test boxes (7) are fixedly connected to the top of the base plate (5) at equal intervals. A connecting pipe (1) is fixedly connected to the back of the test box (7). A pressurizing pipe (2) is fixedly connected to the middle position of the back of the connecting pipe (1). A drain pipe (8) is fixedly connected to the lower front of the test box (7). An installation groove (14) is opened at the top of the test box (7). A box cover (3) is movably connected to the top of the test box (7). A guide plate (16) is fixedly connected to the inner bottom wall of the test box (7). Fixing bolts (4) that penetrate the box cover (3) are movably connected to both sides of the top of the box cover (3). A support block (17) is fixedly connected to the top of the guide plate (16). A concrete test block (12) is movably connected to the inner wall of the support block (17). A fixed clamp (13) is fixedly connected to the inner wall of the test box (7). A movable clamp (11) is movably connected to the other end of the inner wall of the test box (7). A connecting hose (18) is fixedly connected to one side of the movable clamp (11). One end of the connecting hose (18) is fixedly connected to the outside of the test box (7). A piezometer (10) is provided on the front of the test box (7). One end of the piezometer (10) is connected to one end of the connecting hose (18). A clamping assembly (9) is provided on the test box (7). The clamping assembly (9) is used to realize the sliding adjustment of the movable clamp (11).

2. The concrete crack self-healing testing device according to claim 1, characterized in that: The clamping assembly (9) includes a fixing groove (904), which is opened at the upper end of the inner wall of the test box (7). A sealing seat (907) is fixedly connected to the inner wall of the fixing groove (904). A threaded rod (906) is rotatably connected between the inner wall of the fixing groove (904) and one end of the sealing seat (907). A threaded block (905) is threadedly connected to the surface of the threaded rod (906). One side of the threaded block (905) is fixedly connected to the surface of the movable clamp (11). A rotating handle (901) is damped and rotatably connected to one side of the front of the fixing bolt (4). One end of the rotating handle (901) is fixedly connected to one end of the threaded rod (906).

3. The concrete crack self-healing test device according to claim 2, characterized in that: The upper end of the inner wall of the fixing bolt (4) is provided with a sliding groove (902), and a slider (903) that slides in cooperation with the inside of the sliding groove (902) is fixedly connected to one side of the surface of the movable clamp (11).

4. The self-healing concrete crack testing device according to claim 1, characterized in that: The inner walls of the movable clamp (11) and the fixed clamp (13) are fixedly connected with sealing rings (21), and the sealing rings (21) are O-shaped.

5. The self-healing concrete crack testing device according to claim 1, characterized in that: The support block (17) is U-shaped and is symmetrically distributed on both sides of the concrete test block (12).

6. The concrete crack self-healing testing device according to claim 1, characterized in that: The test box (7) has bolt holes (20) on both sides of its top end that are threaded to the bottom end of the fixing bolt (4).

7. The self-healing concrete crack testing device according to claim 6, characterized in that: The surface of the fixing bolt (4) nut is provided with anti-slip textures (19) at equal angles, and the anti-slip textures (19) are arc-shaped.

8. The self-healing concrete crack testing device according to claim 1, characterized in that: A sealing gasket (15) is fixedly connected to the lower end of the surface of the box cover (3), and the area of ​​the cross-section of the sealing gasket (15) is equal to the area of ​​the cross-section of the opening inside the mounting groove (14).

9. The concrete crack self-healing testing device according to claim 1, characterized in that: The top of the guide plate (16) is tilted at an angle of ten degrees to the horizontal direction, and the shape of the guide plate (16) is a right triangle.

Images