Concrete shrinkage experiment equipment

Abstract

The utility model provides concrete shrinkage experiment equipment, which relates to the technical field of concrete detection and comprises a base, a positioning plate is fixedly mounted on one side of the upper surface of the base, a positioning groove is formed in the surface of one side of the positioning plate, and a right-angle frame is movably arranged on one side of the upper surface of the base. A digital dial indicator is arranged on one side of the upper surface of the right-angle frame, and a bearing plate is fixedly installed in the middle of the upper surface of the base. After a concrete block is detached, a worker starts a first motor to enable the output shaft end of the first motor to drive a threaded rod to rotate, the rotating threaded rod drives a moving plate and a shielding cover to descend in a thread screwing-in mode, and after the shielding cover covers a bearing plate, the worker supplies water into a water spraying pipe, so that the concrete block is sprayed to the water spraying pipe. Cleaning water is sprayed to the surfaces of the bearing plate and the rolling ball through the water spraying pipe, the appearance of equipment is prevented from being affected, and meanwhile deviation of an experimental result is prevented.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, and more specifically, to a concrete shrinkage testing device. Background Technology

[0002] Concrete shrinkage testing is conducted to study and understand the properties and patterns of concrete shrinkage in order to evaluate the performance and durability of concrete structures. This experiment typically involves preparing concrete specimens, curing and measuring them under specific environmental conditions, recording the amount of shrinkage deformation, and then analyzing and evaluating the results. For example, the concrete shrinkage testing device proposed in publication number "CN212693781U" includes a base and a digital micrometer for measuring the shrinkage and expansion of a concrete block. The concrete block is located on the base, and abutment blocks and connecting blocks are respectively provided at both ends of the concrete block, both of which are fixedly connected to the base. The first push rod of the concrete block abuts against the abutment block, and the second push rod of the concrete block is close to the connecting block. A through hole is opened in the connecting block, and the sleeve of the digital micrometer passes through the through hole. The measuring head of the digital micrometer abuts against the second push rod of the concrete block. A blocking block is slidably provided on one side of the digital micrometer, and the blocking block contacts the digital micrometer. The dial of the digital micrometer is clamped between the connecting block and the blocking block. A fixing element for fixing the position of the blocking block is provided on the blocking block. This utility model has the effect of improving the accuracy of measurement data.

[0003] However, in the above technical solution, after the concrete block bears the load, the surface of the base of the concrete shrinkage test device may be contaminated with concrete residue, water stains, grease and other pollutants. These contaminants not only affect the appearance of the device, but may also change the contact conditions between the specimen and the device in the next experiment, thereby affecting the stress state of the specimen and causing deviations in the experimental results. Utility Model Content

[0004] The main purpose of this invention is to provide a concrete shrinkage testing device that can effectively solve the problem that after the concrete block is supported by the concrete block, the base of the concrete shrinkage testing device in the background technology may have residual concrete residue, water stains, grease and other contaminants on its surface. These contaminants not only affect the appearance of the device, but may also change the contact conditions between the specimen and the device in the next experiment, thereby affecting the stress state of the specimen and causing deviations in the experimental results.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A concrete shrinkage testing device includes a base, a positioning plate is fixedly installed on one side of the upper surface of the base, and a positioning groove is formed on one side surface of the positioning plate;

[0007] A right-angle bracket is movably mounted on one side of the upper surface of the base, and a digital dial indicator is mounted on one side of the upper surface of the right-angle bracket;

[0008] A bearing plate is fixedly installed in the middle of the upper surface of the base, and a number of rolling balls are movably arranged on the upper surface of the bearing plate.

[0009] A support plate is fixedly installed on one side of the base. A threaded rod is rotatably installed on one side of the upper surface of the support plate. A movable plate is threaded on one side of the threaded rod. A shield is fixedly installed on one side of the movable plate. An installation plate is installed inside the shield. A sprinkler pipe is fixedly installed on the lower surface of the installation plate by a bracket.

[0010] A first motor is fixedly installed on one side of the lower surface of the support plate, and the lower end of the threaded rod passes through the support plate and is fixedly connected to the output shaft end of the first motor.

[0011] Preferably, a positioning rod is fixedly installed on the other side of the upper surface of the support plate, and the movable plate is slidably disposed on one side of the positioning rod.

[0012] Preferably, a first lead screw is rotatably mounted between the two sides of the inner wall of the shield, and the mounting plate is threaded onto one side of the first lead screw.

[0013] A second motor is fixedly installed on one side of the shield, and one end of the first lead screw passes through the shield and is fixedly connected to the output shaft end of the second motor.

[0014] A clearance groove is provided through one side of the inner wall of the shield, and a connecting pipe is fixedly installed at the end of the sprinkler pipe near the clearance groove.

[0015] Preferably, a limiting rod is fixedly installed between the two sides of the inner wall of the shield, and the mounting plate is slidably disposed on one side of the limiting rod.

[0016] Preferably, the upper surface of the base is provided with several water storage tanks.

[0017] Preferably, each of the water storage tanks has a drainage hole through one side of its inner wall.

[0018] Preferably, a movable groove is provided on one side of the upper surface of the base, and a movable block is slidably disposed in the movable groove. The upper surface of the movable block is fixedly connected to the right-angle frame.

[0019] A second lead screw is rotatably installed between the two sides of the inner wall of the movable groove. The movable block is threaded on one side of the second lead screw. One end of the second lead screw passes through the base and is fixedly installed with a handwheel.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) After the concrete block is unloaded, the staff starts the first motor, which drives the threaded rod to rotate. The rotating threaded rod drives the moving plate and the shield to descend by screwing in the thread. After the shield covers the bearing plate, the staff supplies water into the sprinkler pipe so that the sprinkler pipe sprays cleaning water onto the surface of the bearing plate and the rolling ball to avoid affecting the appearance of the equipment and to prevent deviations in the experimental results. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a concrete shrinkage testing device according to the present invention;

[0023] Figure 2 This is a top view schematic diagram of a concrete shrinkage testing device according to the present invention;

[0024] Figure 3 This is a front view schematic diagram of a concrete shrinkage testing device according to the present invention;

[0025] Figure 4 This utility model relates to a concrete shrinkage testing device. Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0026] Figure 5 This utility model relates to a concrete shrinkage testing device. Figure 3 Schematic diagram of the cross-sectional structure at point BB;

[0027] Figure 6 This utility model relates to a concrete shrinkage testing device. Figure 1 An enlarged schematic diagram of the structure at point A in the middle.

[0028] In the diagram: 1. Base; 2. Positioning plate; 3. Positioning groove; 4. Right-angle bracket; 5. Digital dial indicator; 6. Bearing plate; 7. Rolling ball; 8. Support plate; 9. Threaded rod; 10. Moving plate; 11. Cover; 12. Mounting plate; 13. Bracket; 14. Sprinkler pipe; 15. First motor; 16. Positioning rod; 17. First lead screw; 18. Second motor; 19. Limiting rod; 20. Water storage tank; 21. Drain hole; 22. Moving groove; 23. Moving block; 24. Second lead screw; 25. Handwheel; 26. Clearance groove; 27. Connecting pipe. Detailed Implementation

[0029] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0030] like Figures 1-6 As shown, a concrete shrinkage test device includes a base 1, a positioning plate 2 is fixedly installed on one side of the upper surface of the base 1, and a positioning groove 3 is opened on one side of the positioning plate 2.

[0031] A right-angle bracket 4 is movably mounted on one side of the upper surface of the base 1, and a digital micrometer 5 is mounted on one side of the upper surface of the right-angle bracket 4;

[0032] A bearing plate 6 is fixedly installed in the middle of the upper surface of the base 1, and several rolling balls 7 are movably arranged on the upper surface of the bearing plate 6;

[0033] A support plate 8 is fixedly installed on one side of the base 1. A threaded rod 9 is rotatably installed on one side of the upper surface of the support plate 8. A movable plate 10 is threaded on one side of the rod body of the threaded rod 9. A shield 11 is fixedly installed on one side of the movable plate 10. An installation plate 12 is installed inside the shield 11. A sprinkler pipe 14 is fixedly installed on the lower surface of the installation plate 12 through a bracket 13.

[0034] A first motor 15 is fixedly installed on one side of the lower surface of the support plate 8, and the lower end of the threaded rod 9 passes through the support plate 8 and is fixedly connected to the output shaft end of the first motor 15.

[0035] A positioning rod 16 is fixedly installed on the other side of the upper surface of the support plate 8, and the movable plate 10 is slidably disposed on one side of the positioning rod 16.

[0036] The operator places the top rod on one side of the concrete block into the positioning groove 3, and then controls the right-angle frame 4 to move so that the measuring end of the digital micrometer 5 abuts against the top rod on the other side of the concrete block. The operator then observes the display end of the micrometer at regular intervals to know whether the concrete block has shrunk. After the concrete block is unloaded, the operator starts the first motor 15, which drives the threaded rod 9 to rotate at its output shaft end. The rotating threaded rod 9 drives the moving plate 10 and the shield 11 to descend through the threaded advance. After the shield 11 covers the bearing plate 6, the operator supplies water into the sprinkler pipe 14, so that the sprinkler pipe 14 sprays cleaning water onto the surface of the bearing plate 6 and the rolling ball 7 to avoid affecting the appearance of the equipment and prevent deviations in the experimental results.

[0037] In another embodiment of the present invention, a first lead screw 17 is rotatably installed between the two sides of the inner wall of the shield 11, and the mounting plate 12 is threaded onto one side of the first lead screw 17.

[0038] A second motor 18 is fixedly installed on one side of the shield 11, and one end of the first lead screw 17 passes through the shield 11 and is fixedly connected to the output shaft end of the second motor 18.

[0039] A clearance groove 26 is provided through one side of the inner wall of the shield 11, and a connecting pipe 27 is fixedly installed at one end of the sprinkler pipe 14 near the clearance groove 26.

[0040] A limit rod 19 is fixedly installed between the two sides of the inner wall of the shield 11, and the mounting plate 12 is slidably disposed on one side of the limit rod 19.

[0041] By setting up the connecting pipe 27, it is convenient for staff to supply water into the sprinkler pipe 14. Then, the staff controls the second motor 18, which drives the first lead screw 17 to rotate. The rotating first lead screw 17 drives the mounting plate 12 to move along the limit rod 19 by screwing in the thread, so that the sprinkler pipe 14 moves with the mounting plate 12, which increases the spraying range of the sprinkler pipe 14 and improves the cleaning efficiency.

[0042] In another embodiment of this utility model, a plurality of water storage tanks 20 are provided on the upper surface of the base 1.

[0043] Each water storage tank 20 has a drainage hole 21 through one side of its inner wall.

[0044] By setting up a water storage tank 20 and a drain hole 21, the sprayed cleaning water can enter the water storage tank 20 and be discharged through the drain hole 21, thus facilitating the recycling and reuse of the cleaning water by staff.

[0045] In another embodiment of the present invention, a movable groove 22 is provided on one side of the upper surface of the base 1, and a movable block 23 is slidably disposed in the movable groove 22. The upper surface of the movable block 23 is fixedly connected to the right angle frame 4.

[0046] A second lead screw 24 is rotatably installed between the two sides of the inner wall of the movable groove 22. The movable block 23 is threaded on one side of the body of the second lead screw 24. One end of the second lead screw 24 passes through the base 1 and is fixedly installed with a handwheel 25.

[0047] The operator rotates the handwheel 25, which drives the second lead screw 24 to rotate. The rotating second lead screw 24 drives the moving block 23 and the digital dial indicator 5 to move along the moving groove 22 by screwing in the thread.

[0048] The working principle of this concrete shrinkage testing equipment:

[0049] During use, the operator places the top rod on one side of the concrete block into the positioning groove 3, and then controls the right-angle frame 4 to move so that the detection end of the digital micrometer 5 abuts against the top rod on the other side of the concrete block. The operator then observes the display end of the micrometer at regular intervals to know whether the concrete block has shrunk. After the concrete block is unloaded, the operator starts the first motor 15, which drives the threaded rod 9 to rotate. The rotating threaded rod 9 drives the moving plate 10 and the shield 11 to descend through the threaded advance. After the shield 11 covers the support plate 6, the operator supplies water into the sprinkler pipe 14, so that the sprinkler pipe 14 sprays cleaning water onto the surface of the support plate 6 and the rolling ball 7 to avoid affecting the appearance of the equipment and prevent deviations in the experimental results.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A concrete shrinkage testing device, comprising a base (1), characterized in that: A positioning plate (2) is fixedly installed on one side of the upper surface of the base (1), and a positioning groove (3) is opened on one side surface of the positioning plate (2); A right-angle bracket (4) is movably mounted on one side of the upper surface of the base (1), and a digital micrometer (5) is mounted on one side of the upper surface of the right-angle bracket (4); A bearing plate (6) is fixedly installed in the middle of the upper surface of the base (1), and a number of rolling balls (7) are movably arranged on the upper surface of the bearing plate (6); A support plate (8) is fixedly installed on one side of the base (1). A threaded rod (9) is rotatably installed on one side of the upper surface of the support plate (8). A movable plate (10) is threaded on one side of the rod body of the threaded rod (9). A shield (11) is fixedly installed on one side of the movable plate (10). An installation plate (12) is provided inside the shield (11). A sprinkler pipe (14) is fixedly installed on the lower surface of the installation plate (12) through a bracket (13). The first motor (15) is fixedly installed on one side of the lower surface of the support plate (8), and the lower end of the threaded rod (9) passes through the support plate (8) and is fixedly connected to the output shaft end of the first motor (15).

2. The concrete shrinkage testing equipment according to claim 1, characterized in that: A positioning rod (16) is fixedly installed on the other side of the upper surface of the support plate (8), and the moving plate (10) is slidably disposed on one side of the positioning rod (16).

3. The concrete shrinkage testing equipment according to claim 2, characterized in that: A first lead screw (17) is rotatably installed between the two sides of the inner wall of the shield (11), and the mounting plate (12) is threaded onto one side of the first lead screw (17); A second motor (18) is fixedly installed on one side of the shield (11), and one end of the first lead screw (17) passes through the shield (11) and is fixedly connected to the output shaft end of the second motor (18). The shield (11) has a through groove (26) on one side of its inner wall, and a connecting pipe (27) is fixedly installed on one end of the water pipe (14) near the through groove (26).

4. The concrete shrinkage testing equipment according to claim 3, characterized in that: A limiting rod (19) is fixedly installed between the two sides of the inner wall of the shield (11), and the mounting plate (12) is slidably disposed on one side of the limiting rod (19).

5. The concrete shrinkage testing equipment according to claim 4, characterized in that: The upper surface of the base (1) is provided with several water storage tanks (20).

6. The concrete shrinkage testing equipment according to claim 5, characterized in that: Each of the water storage tanks (20) has a drainage hole (21) through one side of its inner wall.

7. The concrete shrinkage testing equipment according to claim 1, characterized in that: A movable groove (22) is provided on one side of the upper surface of the base (1), and a movable block (23) is slidably arranged in the movable groove (22). The upper surface of the movable block (23) is fixedly connected to the right angle frame (4). A second lead screw (24) is rotatably installed between the two sides of the inner wall of the movable groove (22). The movable block (23) is threaded onto one side of the body of the second lead screw (24). One end of the second lead screw (24) passes through the base (1) and is fixedly installed with a handwheel (25).

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