Asphalt concrete fluidity detection device

Abstract

The invention discloses an asphalt concrete flowability detection device, and belongs to the technical field of asphalt concrete detection, the asphalt concrete flowability detection device comprises a base and a Lieve flowability tester located above the base, a vertical plate is fixed on the base, a lifting plate is movably arranged on the vertical plate, a plurality of fixed pipes are fixed on the lifting plate, and the fixed pipes are movably arranged on the vertical plate. An inserting and tamping rod is slidably connected into the fixing pipe, an exhaust box is connected to the top of the fixing pipe, a box cover is arranged at the top of the exhaust box, and an exhaust hose is connected to the top of the box cover; a fixing block is installed on the top wall of the fixing pipe, an elastic rope is connected to the fixing block, one end of the elastic rope is connected with an inserting and tamping rod, a push rod is fixed to the top end of the inserting and tamping rod, positioning rods are symmetrically fixed to the inner surface of the bottom wall of the exhaust box, and positioning blocks are slidably connected to the positioning rods. When the device is used, air in the asphalt concrete can be quickly removed, and the detection precision is improved.

Description

Technical Field

[0004] The invention relates to the technical field of asphalt concrete detection, and in particular to an asphalt concrete fluidity detection device. Background Art

[0005] Asphalt concrete, commonly known as asphalt concrete, is a mixture made by artificially selecting mineral materials with a certain graded composition, crushed stone or crushed gravel, stone chips or sand, mineral powder, etc., and a certain proportion of road asphalt materials, under strictly controlled conditions. The fluidity test of asphalt concrete is to test the fluidity index of concrete.

[0006] In the prior art, the Liuer fluidity test is generally used to detect the fluidity of asphalt concrete. During the test, the material is injected along the edge of the barrel, then preheated and the drop hammer is released, and the time interval for the upper and lower scale lines of the drop hammer to pass through the guide hole of the bracket is recorded to obtain the fluidity of the asphalt concrete. The shorter the time, the stronger the fluidity (low viscosity), and the longer the time, the higher the viscosity. However, due to the high viscosity of asphalt concrete and the mineral and gravel particles therein, bubbles will exist in the material. The bubbles will form gaps in the high-temperature mixture, hindering the uniform sinking of the drop hammer, resulting in a larger measured value of the flow time, reducing the representativeness of the test results. Summary of the invention

[0007] The purpose of the present invention is to provide an asphalt concrete fluidity detection device to solve the following technical problems: asphalt concrete has high viscosity and the mineral materials and gravel particles therein will cause bubbles to exist in the material. The bubbles will form gaps in the high-temperature mixture, hindering the uniform sinking of the drop hammer, resulting in a larger flow time measurement value and reducing the representativeness of the test results.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] An asphalt concrete fluidity testing device comprises a base and a Liuer fluidity tester located above the base, wherein a vertical plate is fixed on the base, a lifting plate is movably arranged on the vertical plate, a plurality of fixed pipes are fixed on the lifting plate, a tamping rod is slidably connected in the fixed pipe, an exhaust box is connected to the top of the fixed pipe, a box cover is arranged on the top of the exhaust box, and an exhaust hose is connected to the top of the box cover;

[0010] A fixing block is installed on the top wall of the fixed tube, an elastic rope is connected to the fixing block, one end of the elastic rope is connected to a tamping rod, a push rod is fixed to the top of the tamping rod, positioning rods are symmetrically fixed to the inner surface of the bottom wall of the exhaust box, a positioning block is slidably connected to the positioning rod, a rubber sealing block is fixed between the two positioning blocks, and the top of the fixed tube is sealed on the rubber sealing block.

[0011] As a further solution of the present invention: a second magnet is fixed to the top of the rubber plugging block, a first magnet is fixed between the two positioning rods, and the surfaces of the first magnet and the second magnet facing each other have the same magnetic property.

[0012] As a further solution of the present invention: a rotating shaft is rotatably installed on the vertical plate, a cam is installed on the rotating shaft, a rectangular hole is formed on the vertical plate, a lifting rod is slidably connected in the rectangular hole, one end of the lifting rod is fixedly connected to the lifting plate, the cam contacts the surface of the lifting rod, a fixed rod is also fixed on the vertical plate, a first spring is connected between the fixed rod and the lifting rod, and the rotating shaft is driven by an external driving source.

[0013] As a further solution of the present invention: a clamping block is fixed to the top of the dropping hammer of the Leuer fluidity tester, a support plate is fixed to the side wall of the vertical plate through a first support rod, a first dropping hole is formed on the lifting plate, a second dropping hole is formed on the support plate, the cross-sectional areas of the first dropping hole and the second dropping hole are both larger than the cross-sectional area of the clamping block, two limiting blocks are slidably connected to the support plate, and notches are formed on the sides of the two limiting blocks close to each other, and the notches match the size of the clamping block.

[0014] As a further solution of the present invention: an air inlet box is fixed to the side wall of the vertical plate through a second support rod, a plurality of air inlet pipes are connected to the air inlet box, one ends of the plurality of exhaust hoses are respectively connected to the plurality of air inlet pipes, air outlet cylinders are symmetrically connected to the side wall of the air inlet box close to the limiting blocks, a piston block is arranged in the air outlet cylinder, a second spring is connected between one side of the piston block and the inner wall of the air inlet box, a movable rod is connected to the other side of the piston block, and the two movable rods are respectively fixedly connected to the two limiting blocks, and one-way valves are installed on the air inlet pipes.

[0015] As a further solution of the present invention: sliding grooves are symmetrically formed on the support plate, sliders are slidably connected in the sliding grooves, connecting rods are fixed to the sliders, and the connecting rods are fixedly connected to the limiting blocks.

[0016] As a further solution of the present invention: a pressure relief pipe is connected to the air inlet box, a gas adding pipe is connected to the side wall of the fixed pipe, and valves are installed on both the pressure relief pipe and the gas adding pipe.

[0017] The beneficial effects of the present invention:

[0018] (1) By arranging the movable lifting plate, cooperating with the fixed pipe and the ramming rod, the present invention rams the material. When the ramming rod is inserted into the material, the mineral aggregate is briefly extruded, the gaps between adjacent particles are reduced, the air is discharged, and the high-temperature asphalt material flows under the ramming pressure to fill the tiny gaps formed by the air discharge, thereby quickly removing the air in the material;

[0019] (2) By setting up structures such as a push rod, an elastic rope, an exhaust box, and a rubber plugging block, after the first ramming, the ramming rod contacts the bottom of the material bucket. Under the action of air pressure and the push rod, the descending plugging block is pushed up, so that the ramming rod is retracted into the fixed tube. After multiple rammings, the ramming rod automatically detaches from the material, and then the fluidity detection starts immediately, reducing the detection time and improving the detection effect.

[0020] (3) By setting up structures such as a rotating shaft, a cam, a lifting rod, and a first spring, the rotation of the cam pushes the lifting rod to descend. Cooperating with the first spring, the lifting plate reciprocates up and down, thereby completing the ramming work on the material, which is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 is the overall structural schematic diagram of the present invention;

[0023] Figure 2 is the structural schematic diagram of the lifting plate and the drop hammer of the present invention in a disassembled state;

[0024] Figure 3 is the internal structural schematic diagram of the fixed tube of the present invention;

[0025] Figure 4 is the internal structural schematic diagram of the exhaust box of the present invention;

[0026] Figure 5 is the structural schematic diagram of the support plate and the air inlet box of the present invention;

[0027] Figure 6 is the internal structural schematic diagram of the air inlet box of the present invention.

[0028] In the figure: 1, base; 2, Leuer fluidity tester; 3, vertical plate; 4, lifting plate; 5, fixed tube; 6, ramming rod; 7, exhaust box; 8, box cover; 9, fixed block; 10, elastic rope; 11, push rod; 12, positioning rod; 13, positioning block; 14, rubber plugging block; 15, first magnet; 16, second magnet; 17, exhaust hose; 18, air inlet box; 19, intake pipe; 20, support plate; 21, clamping block; 22, first drop hole; 23, second drop hole; 24, limit block; 25, notch; 26, air outlet cylinder; 27, second spring; 28, piston block; 29, movable rod; 30, rotating shaft; 31, cam; 32, lifting rod; 33, first spring; 34, fixed rod.

[0029] The accompanying drawings are only for illustrative purposes and should not be construed as limiting the present invention; for better illustration of this embodiment, some components in the drawings are omitted, enlarged or reduced, and do not represent the size and shape of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. Detailed implementation mode

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 to 4 As shown, the present invention is an asphalt concrete fluidity detection device, including a base 1 and a Le Houel fluidity tester 2 located above the base 1. A vertical plate 3 is fixed on the base 1, and a lifting plate 4 is movably arranged on the vertical plate 3. A plurality of fixed pipes 5 are fixed on the lifting plate 4. A ramming rod 6 is slidably connected in the fixed pipe 5. The top of the fixed pipe 5 is connected to an exhaust box 7. The top of the exhaust box 7 is provided with a box cover 8. The top of the box cover 8 is connected to an exhaust hose 17. A fixed block 9 is installed on the top wall of the fixed pipe 5. An elastic rope 10 is connected to the fixed block 9. One end of the elastic rope 10 is connected to the ramming rod 6. A push rod 11 is fixed at the top end of the ramming rod 6. Positioning rods 12 are symmetrically fixed on the inner surface of the bottom wall of the exhaust box 7. A positioning block 13 is slidably connected on the positioning rod 12. A rubber plugging block 14 is fixed between the two positioning blocks 13. The rubber plugging block 14 plugs the top of the fixed pipe 5. The material is poured into the bucket in 2-3 times. The lifting plate 4 moves up and down reciprocally, driving the fixed pipe 5 and the ramming rod 6 to move up and down reciprocally. In the initial state, the air pressure in the fixed pipe 5 is greater than the atmospheric pressure. Under the action of the air pressure and gravity, the elastic rope 10 is stretched, and the ramming rod 6 is closer to the bottom of the bucket. When the lifting plate 4 descends for the first time, the ramming rod 6 touches the bottom, causing the ramming rod 6 to move upward, driving the push rod 11 to push open the rubber plugging block 14. At this time, the air in the fixed pipe 5 is discharged through the exhaust hose 17. Under the action of the tension of the elastic rope 10, the ramming rod 6 moves upward in the fixed pipe 5, but still can ram the material. After ramming many times, the air pressure in the fixed pipe 5 returns to normal, and the ramming rod 6 is retracted into the fixed pipe 5 and separated from the material. At this time, the fluidity of the asphalt concrete can be detected. The hammer drops, and by means of automatic timing, the time interval for the upper and lower scale lines of the hammer to pass through the support guide hole is recorded, and the fluidity of the asphalt concrete can be obtained.

[0032] Refer to Figure 2 and 4, a second magnet 16 is fixed to the top of the rubber plugging block 14, a first magnet 15 is fixed between the two positioning rods 12, and the surfaces of the first magnet 15 and the second magnet 16 that are close to each other have the same magnetic property; according to the principle of like poles repelling, when the rubber plugging block 14 is lifted, the rubber plugging block 14 is blown away by the air pressure, and the exhaust speed can be reduced, so that the ramming rod 6 slowly rises in the fixed pipe 5.

[0033] Refer to Figure 1 , a rotating shaft 30 is rotatably installed on the vertical plate 3, a cam 31 is installed on the rotating shaft 30, a rectangular hole is formed in the vertical plate 3, a lifting rod 32 is slidably connected in the rectangular hole, one end of the lifting rod 32 is fixedly connected to the lifting plate 4, the cam 31 is in contact with the surface of the lifting rod 32, and a fixing rod 34 is also fixed on the vertical plate 3. A first spring 33 is connected between the fixing rod 34 and the lifting rod 32, and the rotating shaft 30 is driven by an external driving source; the driving source drives the rotating shaft 30 to rotate, the driving source is a motor, so as to drive the cam 31 to rotate, and cooperate with the first spring 33 to realize the up and down reciprocating movement of the lifting rod 32 and the lifting plate 4.

[0034] Refer to Figure 1 , Figure 3 , Figure 5 and Figure 6, a clamping block 21 is fixed to the top of the drop hammer of the Liu Er fluidity tester 2. A support plate 20 is fixed to the side wall of the vertical plate 3 through a first support rod. A first dropping hole 22 is formed in the lifting plate 4, and a second dropping hole 23 is formed in the support plate 20. The cross-sectional areas of the first dropping hole 22 and the second dropping hole 23 are both larger than the cross-sectional area of the clamping block 21. Two limiting blocks 24 are slidably connected to the support plate 20. Concave openings 25 are formed on the sides of the two limiting blocks 24 close to each other, and the concave openings 25 are matched with the clamping block 21 in size; an air inlet box 18 is fixed to the side wall of the vertical plate 3 through a second support rod. Multiple air inlet pipes 19 are connected to the air inlet box 18. One ends of multiple exhaust hoses 17 are respectively connected to the multiple air inlet pipes 19. Air outlet cylinders 26 are symmetrically connected to the side wall of the air inlet box 18 close to the limiting blocks 24. A piston block 28 is arranged in the air outlet cylinder 26. A second spring 27 is connected between one side of the piston block 28 and the inner wall of the air inlet box 18. The other side of the piston block 28 is connected with a movable rod 29. The two movable rods 29 are respectively fixed to the two limiting blocks 24. One-way valves are installed on the air inlet pipes 19; in order to make the drop hammer fall immediately after ramming is completed and reduce the error of manual operation, the clamping block 21 is fixed to the top of the drop hammer. Initially, the clamping block 21 is placed on the two limiting blocks 24. When ramming, the gas discharged from the exhaust hose 17 enters the air inlet box 18 through the air inlet pipe 19. The air pressure in the air inlet box 18 gradually increases, thereby pushing the piston block 28 to move, and pushing the two limiting blocks 24 to move through the movable rod 29. When the air pressure in the multiple fixed pipes 5 is completely exhausted, it just pushes the concave opening 25 on the limiting block 24 to align with the clamping block 21. At this time, the clamping block 21 can descend through the concave opening 25, so that the drop hammer can normally descend for detection.

[0035] Refer to Figure 2 and Figure 4 , sliding grooves are symmetrically formed on the support plate 20. Sliders are slidably connected in the sliding grooves. Connecting rods are fixed to the sliders, and the connecting rods are fixed to the limiting blocks 24. A pressure relief pipe is connected to the air inlet box 18. An air filling pipe is connected to the side wall of the fixed pipe 5. Valves are installed on both the pressure relief pipe and the air filling pipe; after the detection is completed, the valve on the pressure relief pipe can be opened to discharge the gas in the air inlet box 18, and air is re-injected into the fixed pipe 5 through the air filling pipe, so that the ramming rod 6 extends out of the fixed pipe 5, facilitating the next detection.

[0036] The working principle of the present invention is as follows: the material is poured into the material barrel in 2-3 times, and the driving source (not shown) is used to drive the rotating shaft 30 to rotate, thereby driving the cam 31 to rotate, and cooperating with the first spring 33 to realize the up and down reciprocating movement of the lifting rod 32 and the lifting plate 4, and the lifting plate 4 drives the fixed tube 5 and the tamping rod 6 to move up and down. In the initial state, the air pressure in the fixed tube 5 is greater than the external atmospheric pressure. Under the action of air pressure and gravity, the elastic rope 10 is stretched, and the tamping rod 6 is close to the bottom of the barrel. When the lifting plate 4 drops for the first time, the tamping rod 6 touches the bottom, so that the tamping rod 6 moves upward, driving the push rod 11 to push the rubber blocking block 14 open. At this time, the air in the fixed tube 5 is discharged through the exhaust hose 17. Under the action of the tension of the elastic rope 10, the tamping rod 6 moves upward in the fixed tube 5, but the material can still be tamped. The mineral material is squeezed briefly, the gap between adjacent particles is reduced, the air is squeezed out, and the high-temperature asphalt flows under the tamping pressure to fill the tiny gaps formed by the discharge of air, thereby quickly removing the air in the material.

[0037] As the tamping progresses, the air pressure in the fixed tube 5 gradually returns to normal, the tamping rod 6 is retracted into the fixed tube 5 and separated from the material, and the gas discharged from the exhaust hose 17 enters the air inlet box 18 through the air inlet pipe 19. The air pressure in the air inlet box 18 gradually increases, thereby pushing the piston block 28 to move, and pushing the two limit blocks 24 to move through the movable rod 29. When the air pressure in the multiple fixed tubes 5 is completely exhausted, the notch 25 on the limit block 24 is pushed to align with the block 21. At this time, the block 21 can drop through the notch 25, allowing the drop hammer to drop normally for testing. By automatically timing, the time interval for the upper and lower scale lines of the drop hammer to pass through the guide hole of the bracket is recorded, and the fluidity of the asphalt concrete can be obtained.

[0038] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An asphalt concrete fluidity detection device, comprising a base (1) and a Le Houel fluidity tester (2) located above the base (1), characterized in that, A vertical plate (3) is fixed on the base (1). A lifting plate (4) is movably arranged on the vertical plate (3). A plurality of fixed tubes (5) are fixed on the lifting plate (4). A ramming rod (6) is slidably connected in the fixed tube (5). The top of the fixed tube (5) is connected with an exhaust box (7). A box cover (8) is arranged on the top of the exhaust box (7). The top of the box cover (8) is connected with an exhaust hose (17). A fixed block (9) is installed on the top wall of the fixed tube (5). An elastic rope (10) is connected to the fixed block (9). One end of the elastic rope (10) is connected with the ramming rod (6). A push rod (11) is fixed at the top end of the ramming rod (6). Positioning rods (12) are symmetrically fixed on the inner surface of the bottom wall of the exhaust box (7). A positioning block (13) is slidably connected on the positioning rod (12). A rubber plugging block (14) is fixed between the two positioning blocks (13). The top of the fixed tube (5) is plugged by the rubber plugging block (14).

2. The asphalt concrete fluidity detection device according to claim 1, characterized in that, A second magnet (16) is fixed on the top of the rubber plugging block (14). A first magnet (15) is fixed between the two positioning rods (12). And the surfaces of the first magnet (15) and the second magnet (16) facing each other are magnetically the same.

3. The asphalt concrete fluidity detection device according to claim 1, characterized in that, A rotating shaft (30) is rotatably installed on the vertical plate (3). A cam (31) is installed on the rotating shaft (30). A rectangular hole is formed in the vertical plate (3). A lifting rod (32) is slidably connected in the rectangular hole. One end of the lifting rod (32) is fixedly connected with the lifting plate (4). The cam (31) is in contact with the surface of the lifting rod (32). A fixed rod (34) is also fixed on the vertical plate (3). A first spring (33) is connected between the fixed rod (34) and the lifting rod (32). The rotating shaft (30) is driven by an external driving source.

4. The asphalt concrete fluidity detection device according to claim 1, characterized in that, A clamping block (21) is fixed on the top of the dropping hammer of the Leuer fluidity tester (2). A support plate (20) is fixed on the side wall of the vertical plate (3) through a first support rod. A first dropping hole (22) is formed in the lifting plate (4). A second dropping hole (23) is formed in the support plate (20). The cross-sectional areas of the first dropping hole (22) and the second dropping hole (23) are both larger than the cross-sectional area of the clamping block (21). Two limiting blocks (24) are slidably connected on the support plate (20). Notches (25) are formed on the sides of the two limiting blocks (24) close to each other. The notches (25) are matched with the clamping block (21) in size.

5. An asphalt concrete fluidity detection device according to claim 4, characterized in that, An air inlet box (18) is fixed on the side wall of the vertical plate (3) through a second support rod. A plurality of air inlet pipes (19) are connected to the air inlet box (18). One ends of the plurality of exhaust hoses (17) are respectively connected to the plurality of air inlet pipes (19). Air outlet cylinders (26) are symmetrically connected to the side wall of the air inlet box (18) close to the limit blocks (24). A piston block (28) is arranged in the air outlet cylinder (26). A second spring (27) is connected between one side of the piston block (28) and the inner wall of the air inlet box (18). The other side of the piston block (28) is connected with a movable rod (29). The two movable rods (29) are respectively fixedly connected with the two limit blocks (24). A check valve is installed on the air inlet pipe (19).

6. The asphalt concrete fluidity detection device according to claim 4, characterized in that, Chutes are symmetrically formed on the support plate (20). Sliders are slidably connected in the chutes. Connecting rods are fixed on the sliders. The connecting rods are fixedly connected with the limit blocks (24).

7. An asphalt concrete fluidity detection device according to claim 5, characterized in that, A pressure relief pipe is connected to the air inlet box (18). An air filling pipe is connected to the side wall of the fixed pipe (5). Valves are installed on both the pressure relief pipe and the air filling pipe.

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