Concrete abrasion resistance testing device

Abstract

The invention discloses a concrete abrasion resistance testing device which comprises an obliquely arranged bottom plate, two testing boxes fixedly connected to the bottom plate, a top plate fixedly connected to the upper side of the bottom plate through a set of stand columns, a hydraulic cylinder installed on the top plate, a base plate fixedly connected to the telescopic end of the hydraulic cylinder, and two clamping devices fixedly connected to the lower side of the base plate. Each clamping device is used for clamping a concrete test piece, the clamping devices and the test boxes are arranged in a one-to-one correspondence mode, the concrete test piece is just located in the test boxes after the base plate descends, the test boxes are tightly covered and sealed by the base plate, stirring devices which are horizontally arranged are arranged in the test boxes, and meanwhile steel balls with the same number and size are put into the test boxes. The concrete abrasion resistance test device provided by the invention has the advantages that the abrasion resistance of the concrete test pieces can be tested by continuously shooting the steel balls to the concrete test pieces, and the two concrete test pieces are arranged to be tested at the same time, so that a contrast test can be performed more vividly.

Description

Technical Field

[0001] The invention relates to the technical field of concrete testing, in particular to a concrete anti-impact and abrasion testing device. Background Art

[0002] The scouring and abrasion of the concrete on the flow surface of hydraulic structures by high-speed sand-containing water flow is a common disease of hydraulic discharge structures such as overflow dams, flood discharge tunnels, and sluice gates. In order to improve the service life of water conservancy and hydropower projects and ensure their safe and reliable operation, high anti-abrasion requirements are put forward for hydraulic concrete materials. The study of the anti-abrasion performance of hydraulic concrete materials has become one of the important contents in the research of concrete materials. The test method for the anti-abrasion performance of hydraulic concrete mainly adopts the underwater steel ball method in the "Hydraulic Concrete Test Code" SL352-2006.

[0003] CN201120201638.3 discloses a water pressure state concrete anti-abrasion test device, including a steel container, a stirring paddle, a steel ball, a base and a concrete specimen, which is composed of two major parts: a concrete anti-abrasion control system and a water pressure control system. The concrete anti-abrasion control system is provided with a motor, a stirring paddle, a steel container, a steel ball and a safety valve, and the water pressure control system is provided with a pipeline, a pressure gauge, a pressure regulating valve, a water pump and a water storage tank. The steel container is a sealed container with a sealing cover and a base fixed with screws or nuts, and a drain valve is provided on the side of the lower section of the steel container. The steel container is connected with the pressure gauge, the pressure regulating valve, the water pump and the water storage tank in sequence by a pipeline. The water pressure state concrete anti-abrasion test device is equipped with a pressure system to test the concrete anti-abrasion performance under a certain water pressure state, which is close to the actual use state, can better reflect the actual situation of the project, and provide theoretical basis for safety design. However, the water pressure state concrete anti-abrasion test device can only test the anti-abrasion performance of the upper surface of the concrete specimen, and cannot test the anti-abrasion performance of the sides of the concrete specimen. When the steel ball collides with the concrete specimen, a small amount of concrete debris will be generated. These concrete debris are difficult to discharge, and the concrete debris in the steel container affects the subsequent experimental results. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a concrete anti-abrasion test device, thereby solving the problems in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A concrete anti-impact and abrasion testing device comprises an inclined bottom plate, two test boxes are fixedly connected to the bottom plate, the upper side of the bottom plate is fixedly connected to a top plate via a group of columns, a hydraulic cylinder is mounted on the top plate, the telescopic end of the hydraulic cylinder is fixedly connected to a base plate, two clamping devices are fixedly connected to the lower side of the base plate, each clamping device is used to clamp a concrete specimen, the clamping devices are arranged in a one-to-one correspondence with the test box, after the base plate descends, the concrete specimen is just located in the test box, and the base plate covers the test box tightly and seals it, a horizontally arranged stirring device is installed in the test box, and steel balls of the same number and size are placed in each test box at the same time.

[0007] Preferably, one side of the test box is provided with an adjusting tube connected to it, a piston is slidably connected in the adjusting tube, one end of the piston is fixedly connected to a piston rod, one end of the piston rod is provided with a roller, a slide groove is provided on the upper side of the bottom plate, a slide plate is slidably connected in the slide groove, and two fixed blocks are detachably fixedly connected to the upper side of the slide plate, each fixed block is provided with an inclined surface on one side, and the roller is in conflict with the inclined surface.

[0008] Preferably, the stirring device includes a horizontally arranged stirring shaft, which passes through two test boxes in sequence. Two stirring paddles are fixedly connected to the stirring shaft, and the two stirring paddles are respectively located in the two test boxes. The upper side of the bottom plate is fixedly connected to a mounting plate, and a motor is installed on one side of the mounting plate. The main shaft of the motor is coaxially arranged with the stirring shaft.

[0009] Preferably, the upper side of the bottom plate is rotatably connected to two rotating shafts, each rotating shaft is provided with a pulley, and the two pulleys are connected by belt transmission, one of the rotating shafts is fixedly connected to a first bevel gear, a second bevel gear is provided on the stirring shaft, the first bevel gear is meshed with the second bevel gear, the other rotating shaft is fixedly connected to a cam, one side of the slide plate is fixedly connected to a touch plate, and the cam is in conflict with the touch plate.

[0010] Preferably, a filtering and collecting device is provided in the test box, and the filtering and collecting device includes an arc-shaped mesh plate, one side of the arc-shaped mesh plate is rotatably connected to a flat mesh plate, and the flat mesh plate is detachably fixed to one side of the inner wall of the test box by screws, and the outer arc surface of the arc-shaped mesh plate is arranged corresponding to the adjusting tube.

[0011] Preferably, a drainage pipe is provided at the bottom of the test box, a water injection pipe is provided on the regulating pipe, and one end of the water injection pipe is detachably connected to the blocking plate.

[0012] The advantages of the present invention are as follows: the concrete anti-impact and wear test device provided by the present invention can test the wear resistance of the concrete specimen by continuously shooting steel balls at the concrete specimen, and setting two concrete specimens for simultaneous testing is to enable a more vivid comparative test.

[0013] The reciprocating motion of the piston can be used to test the dynamic anti-abrasion performance of the concrete specimen under pressure changes, thereby realizing dynamic testing.

[0014] Concrete debris passes through the mesh holes of the arc mesh plate and is discharged from the drain pipe. The flat mesh plate rotates downward, thereby wrapping the steel ball between the arc mesh plate and the flat mesh plate. The steel ball can also be cleaned by injecting water into the test box through the water injection pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a basic structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic structural diagram of the stirring device of the present invention;

[0017] Figure 3 yes Figure 1 A local enlarged view of point A in FIG.

[0018] Figure 4 It is a schematic diagram of the arrangement of the test box and the filtering and collecting device of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] like Figure 1-4 As shown, a concrete anti-abrasion test device provided by the present invention comprises an inclined bottom plate 1, a collecting box 8 is fixedly connected to the bottom of the bottom plate 1, a distribution box 10 is fixedly connected to one side of the collecting box 8, two test boxes 2 are fixedly connected to the bottom plate 1, a stirring device arranged horizontally is installed in the test box 2, and steel balls of the same number and size are placed in each test box 2. The stirring device comprises a stirring shaft 12 arranged horizontally, the stirring shaft 12 passes through the two test boxes 2 in sequence, two stirring paddles 13 are fixedly connected to the stirring shaft 12, and the two stirring paddles 13 are respectively located in the two test boxes 2, a mounting plate 13 is fixedly connected to the upper side of the bottom plate 1, a motor 14 is installed on one side of the mounting plate 13, and the main shaft of the motor 14 is coaxially arranged with the stirring shaft 12.

[0021] The upper side of the bottom plate 1 is fixedly connected to the top plate 3 through a group of columns 31. A hydraulic cylinder 41 is installed on the top plate 3. The telescopic end of the hydraulic cylinder 41 is fixedly connected to the base plate 4. The lower side of the base plate 4 is fixedly connected to two clamping devices 42. The clamping devices 42 are existing technologies. Each clamping device 42 is used to clamp the concrete specimen. The clamping devices 42 are arranged in a one-to-one correspondence with the test box 2. After the base plate 4 is lowered, the concrete specimen is just located in the test box 2, and the base plate 4 covers the test box 2 tightly and seals it. A flexible sealing ring 20 is provided on the top of the test box 2. The sealing ring 20 can improve the sealing strength between the base plate 4 and the test box 2.

[0022] Thus, when the concrete specimen is subjected to the impact and abrasion resistance test, two concrete specimens of the same size are clamped by two clamping devices respectively, and an equal amount of water is put into each test box 2. The base plate 4 is pushed down by the hydraulic cylinder 41 and contacts the test box 2, so that the test box 2 is in a sealed state. At this time, the two concrete specimens are respectively located in the two test boxes 2. The motor 14 drives the stirring shaft 12 to rotate, and the stirring paddle 13 drives the steel balls to fly while following the rotation of the stirring shaft 12. The flying steel balls are continuously shot at the concrete specimens, so that the wear resistance of the concrete specimens can be tested. Setting two concrete specimens for simultaneous testing is to enable a more vivid comparative test.

[0023] As an implementation mode of the present invention, in order to be able to test the dynamic anti-abrasion performance of concrete specimens under different pressure changes, this embodiment is provided with an adjustment tube 21 connected to the test box 2 on one side thereof, a piston 22 is slidably connected in the adjustment tube 21, one end of the piston 22 is fixedly connected to a piston rod 23, one end of the piston rod 23 is provided with a roller 24, a slide groove 11 is provided on the upper side of the bottom plate 1, a slide plate 5 is slidably connected in the slide groove 11, and two fixed blocks 51 are detachably fixedly connected on the upper side of the slide plate 5, each fixed block 51 is provided with an inclined surface on one side, and the roller 24 conflicts with the inclined surface. The inclined surfaces of the two fixed blocks 51 have different inclination angles. The fixed blocks 51 can be disassembled, so that the fixed blocks 51 with different inclination angles can be replaced according to actual conditions. The upper side of the bottom plate 1 is rotatably connected to two rotating shafts, each rotating shaft is provided with a pulley 15, and the two pulleys 15 are connected through a belt 16. One of the rotating shafts is fixedly connected to a first bevel gear 18, and a second bevel gear 19 is provided on the stirring shaft 12, and the first bevel gear 18 is meshed with the second bevel gear 19. The other rotating shaft is fixedly connected to a cam 15, and one side of the slide plate 5 is fixedly connected to a touch plate 52, and the cam 15 is in conflict with the touch plate 52.

[0024] In this way, when the motor 14 drives the stirring shaft 12 to rotate, since the first bevel gear 18 is meshed with the second bevel gear 19, under the simultaneous action of the belt 16, the two rotating shafts rotate simultaneously, so that the cam 15 can push the slide plate 5 to move, so that the fixed block 51 follows the movement, so that the fixed block 51 pushes the piston 22 to move, thereby changing the space in the test box 2, compressing the water in the test box 2 to increase the pressure, and then after the piston 22 loses thrust, the pressure in the test box 2 will cause the piston 22 and the piston rod to retreat, so that the dynamic anti-wear performance of the concrete specimen under pressure changes can be tested, thereby realizing dynamic testing.

[0025] As an embodiment of the present invention, in order to facilitate the cleaning of concrete debris and the collection of steel balls, a filtering and collecting device is provided in the test box 2, and the filtering and collecting device includes an arc mesh plate 7, one side of the arc mesh plate 7 is rotatably connected to the plane mesh plate 71, and the plane mesh plate 71 is detachably fixed to one side of the inner wall of the test box 2 by screws 72, and the outer arc surface of the arc mesh plate 7 is arranged corresponding to the regulating pipe 21. A drainage pipe 26 is provided at the bottom of the test box 2, and a water injection pipe 25 is provided on the regulating pipe 21, and one end of the water injection pipe 25 is detachably connected to the blocking plate. In this way, the concrete debris passes through the mesh holes of the arc mesh plate 7 and is discharged from the drainage pipe 26, and a valve is installed on the drainage pipe 26. After loosening the screws 72, the plane mesh plate 71 rotates downward, thereby wrapping the steel balls between the arc mesh plate 7 and the plane mesh plate 71, and water is injected into the test box 2 through the water injection pipe 25 to clean the steel balls.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete abrasion resistance test device, characterized in that: The invention comprises an inclined bottom plate (1), two test boxes (2) are fixedly connected to the bottom plate (1), the upper side of the bottom plate (1) is fixedly connected to a top plate (3) via a group of columns (31), a hydraulic cylinder (41) is mounted on the top plate (3), the telescopic end of the hydraulic cylinder (41) is fixedly connected to a base plate (4), the lower side of the base plate (4) is fixedly connected to two clamping devices (42), each clamping device (42) is used to clamp a concrete specimen, the clamping devices (42) are arranged in a one-to-one correspondence with the test boxes (2), after the base plate (4) is lowered, the concrete specimen is just located in the test box (2), and the base plate (4) covers the test box (2) tightly and seals it, a horizontally arranged stirring device is mounted in the test box (2), and steel balls of the same number and size are placed in each of the test boxes (2).

2. A concrete abrasion resistance testing device according to claim 1, characterized in that: A regulating tube (21) is provided on one side of the test box (2) and is in communication with the regulating tube (21). A piston (22) is slidably connected inside the regulating tube (21). One end of the piston (22) is fixedly connected to a piston rod (23). One end of the piston rod (23) is provided with a roller (24). A sliding groove (11) is provided on the upper side of the bottom plate (1). A slide plate (5) is slidably connected inside the sliding groove (11). Two fixed blocks (51) are detachably fixedly connected on the upper side of the slide plate (5). Each fixed block (51) is provided with an inclined surface on one side, and the roller (24) contacts the inclined surface.

3. A concrete abrasion resistance testing device according to claim 2, characterized in that: The stirring device comprises a horizontally arranged stirring shaft (12), the stirring shaft (12) sequentially passing through two test boxes (2), two stirring paddles (13) being fixedly connected to the stirring shaft (12), the two stirring paddles (13) being respectively located in the two test boxes (2), the upper side of the bottom plate (1) being fixedly connected to a mounting plate (13), one side of the mounting plate (13) being provided with a motor (14), the main shaft of the motor (14) being coaxially arranged with the stirring shaft (12).

4. A concrete abrasion resistance testing device according to claim 3, characterized in that: The upper side of the bottom plate (1) is rotatably connected to two rotating shafts, each rotating shaft is sleeved with a pulley (15), and the two pulleys (15) are connected by a belt (16). One of the rotating shafts is fixedly connected to a first bevel gear (18), and the stirring shaft (12) is sleeved with a second bevel gear (19), and the first bevel gear (18) is meshed with the second bevel gear (19). The other rotating shaft is fixedly connected to a cam (15), and one side of the slide plate (5) is fixedly connected to a contact plate (52), and the cam (15) is in contact with the contact plate (52).

5. A concrete abrasion resistance testing device according to claim 2, characterized in that: The test box (2) is provided with a filtering and collecting device, which comprises an arc-shaped mesh plate (7), one side of the arc-shaped mesh plate (7) is rotatably connected to a flat mesh plate (71), the flat mesh plate (71) is detachably fixed to one side of the inner wall of the test box (2) by means of screws, and the outer arc surface of the arc-shaped mesh plate (7) is arranged corresponding to the regulating tube (21).

6. A concrete abrasion resistance testing device according to claim 5, characterized in that: A drainage pipe (26) is provided at the bottom of the test box (2), and a water injection pipe (25) is provided on the regulating pipe (21), and one end of the water injection pipe (25) is detachably connected to a blocking plate.

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