Cement water retention rate detection device

Abstract

The utility model relates to a cement water retention rate detection device which effectively solves the problem that an existing device is troublesome to clean after being used. According to the technical scheme, the device comprises a vertical plate, a weighing device is arranged below the vertical plate, a horizontal rotating shaft is installed on the vertical plate, a barrel is fixed to the front end of the rotating shaft, the axis of the barrel is perpendicular to the rotating shaft, an L-shaped plate is installed on the rotating shaft through a bearing, a vertical rod is arranged at the upper end of the L-shaped plate in a sliding and penetrating mode, and an end cover is fixed to the lower end of the vertical rod. The vertical rod is provided with a pressure spring located above the end cover, the electromagnet is located on the vertical rod, and the electromagnet is electrified to attract the upper end of the vertical rod so as to compress the pressure spring; a material pipe is arranged on the anticlockwise side of the magnet, and when the barrel rotates clockwise until the barrel opening is located below the material pipe, the material pipe injects cement paste into the barrel; no stirring device is arranged, the release agent is sprayed on the inner wall of the barrel, and no large-area residual material is left on the inner wall of the barrel, so that the cleaning difficulty of the device after use is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of building materials, specifically a cement water retention rate testing device. Background Technology

[0002] Water retention refers to the ability of freshly mixed cement to retain water. Water retention reflects the stability of cement to a certain extent. Cement with good water retention will not experience severe bleeding during construction. Therefore, cement water retention is a necessary test.

[0003] The utility model patent with application number CN202323510629.4 discloses a cement water retention testing device, which is equipped with a stirring component to stir the cement slurry. After stirring evenly, the slurry is transferred to a material box for solidification and weighing, and then the water retention rate is calculated. The stirring component includes a rotating shaft, stirring blades and scrapers, etc. After stirring, each component is covered with slurry, resulting in a large amount of cleaning work. Summary of the Invention

[0004] This invention provides a cement water retention rate testing device to address the problem of cumbersome cleaning after the existing device has been used.

[0005] The technical solution includes a vertical plate with a weighing device below it. A horizontal rotating shaft is mounted on the vertical plate via a bearing. A cylinder is fixed to the front end of the rotating shaft, with the axis of the cylinder perpendicular to the rotating shaft. An L-shaped plate is mounted on the rotating shaft via a bearing. A vertical rod slides through the upper end of the L-shaped plate, and an end cap is fixed to the lower end of the vertical rod. A compression spring is mounted on the vertical rod above the end cap. An electromagnet is also included on the vertical rod. When the electromagnet is energized, it attracts the upper end of the vertical rod, compressing the compression spring. A material pipe is located on the counterclockwise side of the electromagnet. When the cylinder rotates clockwise until the cylinder opening is below the material pipe, the material pipe injects cement slurry into the cylinder.

[0006] The inner wall of the cylinder is provided with a draft angle.

[0007] A release agent nozzle is provided on the counterclockwise side of the material tube.

[0008] The lower surface of the end cap is provided with a heating layer.

[0009] A horizontal base is fixed below the vertical plate.

[0010] The rear end of the shaft is equipped with a first gear, which meshes with a second gear, and the second gear is connected to a drive motor.

[0011] The upper end of the vertical rod is fixed with a positioning ball, and the lower side of the electromagnet is provided with a spherical positioning groove. When the electromagnet attracts the vertical rod, the vertical rod automatically moves to a vertical position under the positioning action of the positioning ball and the positioning groove.

[0012] This invention does not include a stirring device and sprays a release agent on the inner wall of the cylinder, so that no large area of ​​residue remains on the inner wall of the cylinder, thus greatly reducing the difficulty of cleaning the device after use. Attached Figure Description

[0013] Figure 1 This is a left sectional view of the present invention.

[0014] Figure 2 This is a front sectional view of the cylinder of this utility model when it is located at the release agent spraying station.

[0015] Figure 3 This is a front sectional view of the cylinder of this utility model when it is located at the grouting station.

[0016] Figure 4 This is a front sectional view of the cylindrical body of this utility model when it is closed by the end cap.

[0017] Figure 5 This is a front sectional view of the cylinder of this utility model when it is located in the demolding station. Detailed Implementation

[0018] Referring to the accompanying drawings, this utility model includes a vertical plate 1, a weighing device 2 located below the vertical plate 1, a horizontal rotating shaft 3 mounted on the vertical plate 1 via bearings, a cylinder 4 fixed to the front end of the rotating shaft 3, the axis of the cylinder 4 being perpendicular to the rotating shaft 3, an L-shaped plate 5 mounted on the rotating shaft 3 via bearings, a vertical rod 6 slidingly passing through the upper end of the L-shaped plate 5, an end cap 7 fixed to the lower end of the vertical rod 6, a compression spring 8 mounted on the vertical rod 6 above the end cap 7, and an electromagnet 9 located on the vertical rod 6. When energized, the electromagnet 9 will... When the upper end of the vertical rod 6 is attracted, the compression spring 8 is compressed. When the opening of the cylinder 4 is facing upward, the end cap 7 is located directly above the opening. When the electromagnet 9 is de-energized, the end cap 7 will move down and press into the opening of the cylinder 4 under the action of the compression spring 8, sealing the opening of the cylinder 4. At this time, the L-shaped plate 5 and the end cap 7 will rotate synchronously with the cylinder 4, keeping the cylinder 4 sealed throughout its rotation. A material pipe 10 is provided on the counterclockwise side of the magnet. When the cylinder 4 rotates clockwise until the opening is below the material pipe 10, the material pipe 10 injects cement slurry into the cylinder 4.

[0019] The inner wall of the cylinder 4 is provided with a demolding slope, which is usually 1 to 3 degrees, to facilitate the demolding of cement after solidification.

[0020] The material pipe 10 is provided with a release agent nozzle 11 on the counterclockwise side. When the cylinder 4 is rotated clockwise until the cylinder opening is aligned with the release agent nozzle 11, the release agent nozzle 11 can spray the release agent onto the inner wall of the cylinder 4, which facilitates demolding after the cement in the cylinder 4 has solidified.

[0021] The lower surface of the end cap 7 is provided with a heating layer 12, which heats the inside of the cylinder 4 during solidification, thereby improving solidification efficiency.

[0022] A horizontal base 13 is fixed below the vertical plate 1 so that it can be stably placed on the weighing device 2.

[0023] The rear end of the rotating shaft 3 is equipped with a first gear 14, which meshes with a second gear 15. The second gear 15 is connected to a drive motor 16, which drives the rotating shaft 3 to rotate through the gear set.

[0024] The upper end of the vertical rod 6 is fixed with a positioning ball 17, and the lower side of the electromagnet 9 is provided with a spherical positioning groove 18. When the electromagnet 9 attracts the vertical rod 6, the vertical rod 6 automatically moves to a vertical position under the positioning action of the positioning ball 17 and the positioning groove 18.

[0025] In use, the weighing device 2 first records the net weight G1 of the device. Initially, the electromagnet 9 attracts the vertical rod 6, the compression spring 8 is compressed, and the L-shaped plate 5 does not rotate with the rotating shaft 3. The drive motor 16 is started, and the rotating shaft 3 drives the cylinder 4 to rotate clockwise. The cylinder opening first rotates to the position aligned with the release agent nozzle 11. The release agent nozzle 11 sprays the release agent onto the inner wall of the cylinder 4. Then the cylinder 4 continues to rotate until the cylinder opening is aligned with the material pipe 10. The material pipe 10 begins to inject cement slurry into the cylinder 4. Then the cylinder 4 continues to rotate until it is vertical and the cylinder opening is directly below the end cap 7. The electromagnet 9 is de-energized, and the end cap 7 is pressed down into the cylinder opening under the action of the compression spring 8 to seal the cylinder 4. The cylinder 4 continues to rotate, and the end cap 7 and the L-shaped plate 5 will rotate synchronously with the cylinder 4 to keep the cylinder 4 sealed at all times. During the rotation, the cement slurry inside the cylinder 4 is mixed evenly.

[0026] After the cement slurry is mixed evenly, the cylinder 4 is stationary in a vertical position. The weighing device 2 records the total weight G2 of the device and the cement slurry at this time. Then, the electromagnet 9 is energized with a small current, which slightly lifts the vertical rod 6, making a gap between the end cap 7 of the vertical rod 6 and the cylinder opening. Then, the heating layer 12 on the lower surface of the end cap 7 begins to heat up, which accelerates the solidification of the cement, and the water vapor escapes from the gap.

[0027] After the cement has completely solidified, the weighing device 2 records the total weight G3 of the cement block and the weighing device. Then, the electromagnet 9 is energized at full power, attracting the vertical rod 6 to completely detach the end cap 7 from the cylinder 4. Then, the cylinder 4 continues to rotate until the cylinder opening faces downward. The side wall and bottom of the cylinder 4 are gently tapped, and the cement block is removed from the cylinder 4.

[0028] The weight of the cement slurry can be obtained by the difference between G2 and G1. The weight of the cement block after solidification can be obtained by the difference between G3 and G1. The weight of water loss can be obtained by the difference between G3 and G2. Thus, the water retention rate of the cement can be calculated.

[0029] This invention uses the rotation of the cylinder 4 to mix the cement slurry, eliminating the need for a stirring device and preventing cement residue from solidifying on the stirring device. By spraying a release agent on the inner wall of the cylinder 4, the solidified cement block can be easily and completely demolded, and no large area of ​​residue will remain on the inner wall of the cylinder 4. Therefore, the cleaning difficulty of the device after use is greatly reduced.

Claims

1. A cement water retention rate testing device, comprising a vertical plate (1), and a weighing device (2) disposed below the vertical plate (1), characterized in that, A horizontal rotating shaft (3) is mounted on the vertical plate (1) via a bearing. A cylinder (4) is fixed at the front end of the rotating shaft (3). The axis of the cylinder (4) is perpendicular to the rotating shaft (3). An L-shaped plate (5) is mounted on the rotating shaft (3) via a bearing. A vertical rod (6) is slidably passed through the upper end of the L-shaped plate (5). An end cap (7) is fixed at the lower end of the vertical rod (6). A compression spring (8) is mounted on the vertical rod (6) above the end cap (7). An electromagnet (9) is also included on the vertical rod (6). When the electromagnet (9) is energized, it will attract the upper end of the vertical rod (6) and compress the compression spring (8). A material pipe (10) is provided on the counterclockwise side of the magnet. When the cylinder (4) rotates clockwise until the cylinder opening is below the material pipe (10), the material pipe (10) injects cement slurry into the cylinder (4).

2. The cement water retention rate testing device according to claim 1, characterized in that, The inner wall of the cylinder (4) is provided with a demolding draft angle.

3. A cement water retention rate testing device according to claim 1 or 2, characterized in that, The material pipe (10) is provided with a release agent nozzle (11) on the counterclockwise side.

4. The cement water retention rate testing device according to claim 1, characterized in that, The lower surface of the end cap (7) is provided with a heating layer (12).

5. The cement water retention rate testing device according to claim 1, characterized in that, A horizontal base (13) is fixed below the vertical plate (1).

6. The cement water retention rate testing device according to claim 1, characterized in that, The rear end of the shaft (3) is equipped with a first gear (14), the first gear (14) meshes with a second gear (15), and the second gear (15) is connected to a drive motor (16).

7. The cement water retention rate testing device according to claim 1, characterized in that, The upper end of the vertical rod (6) is fixed with a positioning ball (17), and the lower side of the electromagnet (9) is provided with a spherical positioning groove (18). When the electromagnet (9) attracts the vertical rod (6), the vertical rod (6) automatically moves to the vertical position under the positioning action of the positioning ball (17) and the positioning groove (18).

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