Testing device for measuring fluidity of cement paste

Abstract

The utility model relates to the technical field of cement paste fluidity measurement, and discloses a cement paste fluidity measurement testing device which comprises a conical hopper, drainage holes are formed in the upper portions of the four sides of the outer wall of the conical hopper, and discharging pipes are fixedly connected to the positions, located on the outer sides of the drainage holes, of the outer wall of the conical hopper. And retention frames are fixedly connected to the lower sides of the outer walls of the discharging pipes correspondingly, material receiving boxes are arranged on the inner walls of the bottom ends of the retention frames correspondingly, and clamping grooves are formed in the upper portions of the side edges of the material receiving boxes correspondingly. According to the utility model, under the cooperation of the drainage hole, the discharge pipe, the retention frame and the material receiving box, when cement paste is manually poured into the conical hopper and the horizontal plane of the cement paste in the conical hopper exceeds the bottom of the drainage hole, the redundant part overflows from the drainage hole and is discharged out of the material receiving box along the discharge pipe; therefore, the horizontal plane height of the cement paste in the conical hopper is kept near the bottom of the drainage hole, the amount of the cement paste is controlled in a specified range, and the influence on a measurement result is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cement slurry fluidity measurement technology, specifically to a cement slurry fluidity measurement test device. Background Technology

[0002] Cement slurry fluidity measures the ability of cement slurry to flow under its own weight or external force. It has a significant impact on the workability of cement-based materials. In building structures, appropriate cement slurry fluidity can ensure the compactness of concrete, reduce internal pores and cracks, and improve the durability indicators of concrete such as impermeability, frost resistance, and erosion resistance.

[0003] Currently, some existing tests for determining the fluidity of cement slurry require pouring the cement slurry into a conical container beforehand, and the volume poured must be controlled within the range of 1725ml ± 5ml. However, the pouring process is generally done manually, which is prone to errors and makes it difficult to control the amount of cement slurry within the specified range, thus affecting the test results.

[0004] In order to reduce the error when cement slurry is poured into the conical container and reduce the impact on the test results, this application proposes a cement slurry flowability test device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a cement slurry fluidity testing device that ensures the cement slurry volume is controlled within a specified range, thereby reducing the impact on the test results.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cement slurry fluidity testing device, comprising a conical hopper, with drainage holes on the upper part of all four sides of the outer wall of the conical hopper, a discharge pipe fixedly connected to the outer wall of the conical hopper outside the drainage holes, a retaining frame fixedly connected to the lower side of the outer wall of the discharge pipe, a receiving box provided on the inner wall of the bottom end of the retaining frame, a slot provided on the upper part of the side of the receiving box, the shape of the outer wall of the bottom two sides of the retaining frame matching the shape of the inner wall of the slot, a discharge pipe fixedly connected to the bottom end of the conical hopper, a solenoid valve installed on the outer wall of the discharge pipe, and supports fixedly connected to the bottom of all four sides of the outer wall of the conical hopper, with an annular plate fixedly connected to the lower side of the outer wall of the supports.

[0007] Further description: Extension plates are fixedly connected to both ends of the inner wall of the annular plate, and a material discharge basin is provided between the two extension plates; here, the material discharge basin catches the discharged cement slurry and prevents it from flowing randomly.

[0008] Further description: Baffles are fixedly connected to the upper sides of both the left and right ends of the material drop basin, and insertion holes are opened on opposite sides of the inner wall of the baffles; here, the baffles are used to rest on the top of the extension plate and support the connected material drop box.

[0009] Further description: Each of the top sides of the extension plate is fixedly connected with a positioning bolt, and the shape of the top of the positioning bolt matches the shape of the inner wall of the socket; here, the outer wall of the positioning bolt is cylindrical, and its outer diameter is the same as the inner diameter of the socket.

[0010] Further description: An L-shaped plate is fixedly connected to the right side of the top of the cone, and a sliding rod is slidably connected to the inner wall of the left side of the top of the L-shaped plate; here, the outer wall of the sliding rod is square.

[0011] Further description: A pressure sensor is fixedly connected to the top of the L-shaped plate on the left side of the slide rod, and a pressure plate is fixedly connected to the top of the slide rod; here, the pressure plate extends to the left, and its lower side corresponds to the pressure sensor.

[0012] Further description: A float is fixedly connected to the bottom end of the slide bar. The diameter of the float is smaller than the diameter of the inner wall of the discharge pipe. Here, the float can float on the surface of the cement slurry to support the slide bar.

[0013] Further description: An electronic timer is installed on the front side of the top of the annular plate, and a controller is installed on the right end of the annular plate; here, the controller adopts PLC linkage technology, and the electronic timer and the controller have a program linkage relationship. Beneficial effects

[0014] 1. In this utility model, through the cooperation of the drain hole, the discharge pipe, the fixing frame, and the receiving box, when cement slurry is manually poured into the conical hopper, when the level of the cement slurry in the conical hopper exceeds the bottom of the drain hole, the excess part will overflow from the drain hole and be discharged into the receiving box along the discharge pipe. This keeps the level of the cement slurry in the conical hopper near the bottom of the drain hole, ensuring that the amount of cement slurry is controlled within the specified range and reducing the impact on the measurement results.

[0015] 2. In this utility model, by combining an L-shaped plate, a pressure sensor, a sliding rod, a float, a pressure plate, a solenoid valve, an electronic timer, and a controller, the flowability of cement slurry can be measured without manual observation and timing. This avoids the problems of asynchronous hand-brain reactions and inadequate observation lines that exist in manual timing, thereby improving the accuracy of the measurement results. Attached Figure Description

[0016] Figure 1 This is a perspective view of a cement slurry fluidity testing device according to the present invention;

[0017] Figure 2This is a cross-sectional view of the conical hopper of a cement slurry fluidity testing device according to the present invention;

[0018] Figure 3 This is a schematic diagram of the receiving box structure of a cement slurry fluidity testing device according to the present invention;

[0019] Figure 4 This is a schematic diagram of the L-shaped plate structure of a cement slurry fluidity testing device according to the present invention;

[0020] Figure 5 This is a schematic diagram of the annular plate structure of a cement slurry fluidity testing device according to the present invention;

[0021] Figure 6 This is a schematic diagram of the material box structure of a cement slurry flowability testing device according to the present invention.

[0022] In the diagram: 1. Conical hopper; 2. Support; 3. Annular plate; 4. Drop basin; 5. Discharge pipe; 6. Receiving box; 7. L-shaped plate; 8. Slide bar; 9. Controller; 10. Electronic timer; 11. Discharge pipe; 12. Solenoid valve; 13. Fixing frame; 14. Drain hole; 15. Slot; 16. Pressure plate; 17. Float; 18. Touch pressure sensor; 19. Extension plate; 20. Positioning bolt; 21. Baffle; 22. Insertion hole. Detailed Implementation

[0023] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0024] Please see Figures 1-3 as well as Figures 5-6A cement slurry fluidity testing device includes a conical hopper 1. Drainage holes 14 are provided on the upper part of all four sides of the outer wall of the conical hopper 1. Discharge pipes 5 are fixedly connected to the outer wall of the conical hopper 1 outside the drainage holes 14. A retaining frame 13 is fixedly connected to the lower side of the outer wall of each discharge pipe 5. A receiving box 6 is provided on the inner wall of the bottom end of each retaining frame 13. A slot 15 is provided on the upper part of the side of each receiving box 6. The shape of the outer walls on both sides of the bottom end of the retaining frame 13 matches the shape of the inner wall of the slot 15. A discharge pipe 11 is fixedly connected to the bottom end of the conical hopper 1. A solenoid valve 12 is installed on the wall. A bracket 2 is fixedly connected to the bottom of the four sides of the outer wall of the cone hopper 1. An annular plate 3 is fixedly connected to the lower side of the outer wall of the bracket 2. An extension plate 19 is fixedly connected to the left and right ends of the inner wall of the annular plate 3. A material drop basin 4 is set between the two extension plates 19. A baffle 21 is fixedly connected to the upper side of the left and right ends of the material drop basin 4. An insertion hole 22 is opened on the opposite side of the inner wall of the baffle 21. A positioning bolt 20 is fixedly connected to the opposite side of the top of the extension plate 19. The shape of the top of the positioning bolt 20 matches the shape of the inner wall of the insertion hole 22.

[0025] To further explain, firstly, the position and height of the drain hole 14 are determined. The opening is measured in advance, and the horizontal height of the bottom of the drain hole 14 is matched with the fluid in the cone hopper 1 and the volume is within the range of 1725ml±5ml. During operation, when the horizontal level of the poured cement slurry in the cone hopper 1 exceeds the drain hole 14, the cement slurry will overflow from the drain hole 14 and be discharged into the receiving box 6 along the discharge pipe 5 until the horizontal level of the overflowed cement slurry is lower than the bottom of the drain hole 14, and the overflow stops. At this time, the volume of cement slurry in the cone hopper 1 is within the range of 1725ml±5ml. The controller 9 opens the solenoid valve 12, and at the same time, the electronic timer 10 linked to it starts timing. Subsequently, the cement slurry is continuously discharged from the discharge pipe 11 into the drop basin 4.

[0026] Additional information: The controller 9 is linked with the solenoid valve 12 and the electronic timer 10, and uses PLC technology to operate according to the set program. Example 2

[0027] Please see Figure 1 , Figure 4 Further, based on the first embodiment, an L-shaped plate 7 is fixedly connected to the right side of the top of the cone hopper 1, a slide rod 8 is slidably connected to the inner wall of the left side of the top of the L-shaped plate 7, a touch pressure sensor 18 is fixedly connected to the top of the L-shaped plate 7 on the left side of the slide rod 8, a pressure plate 16 is fixedly connected to the top of the slide rod 8, a float ball 17 is fixedly connected to the bottom of the slide rod 8, the diameter of the float ball 17 is smaller than the diameter of the inner wall of the discharge pipe 11, an electronic timer 10 is installed on the front side of the top of the annular plate 3, and a controller 9 is installed on the right side of the annular plate 3;

[0028] To further explain, before pouring cement slurry into the cone hopper 1, first lift the sliding rod 8 upwards, allowing it to slide upwards along the inner wall of the L-shaped plate 7, and move the float 17 to the upper part of the cone hopper 1. Then, pour the cement slurry into the cone hopper 1. After that, naturally lower the sliding rod 8, allowing the bottom of the float 17 to float on the surface of the cement slurry. As the cement slurry in the cone hopper 1 is discharged outwards, its horizontal level decreases, and the position of the float 17 changes accordingly, causing the sliding rod 8 to slide down. When the cement slurry is completely discharged, the float 17 completely sinks into the discharge pipe 11, and the sliding rod 8, along with the pressure plate 16, slides completely to the top of the L-shaped plate 7. The pressure plate 16 generates contact pressure on the touch sensor 18. After receiving the contact pressure, the touch sensor 18 generates an electrical signal that is transmitted to the controller 9. The controller 9 controls the electronic timer 10 to stop timing. This completes the determination of the flowability of the cement slurry. If the outflow time of the cement slurry in the cone hopper 1 is within a certain range, the cement is qualified; otherwise, it is unqualified.

[0029] Finally, for cleaning, lift the baffles 21 on both sides of the material drop basin 4 upwards, so that the insertion hole 22 is disengaged from the outer wall of the positioning bolt 20, thereby removing the material drop basin 4 from the inner side of the annular plate 3 to clean the cement slurry that has entered it. At the same time, pull the receiving box 6 out from between the corresponding retaining frames 13, so that the slot 15 is disengaged from the bottom outer wall of the retaining frame 13 to clean the cement slurry in the receiving box 6.

[0030] Working principle: First, the position and height of the drain hole 14 are measured in advance. The horizontal plane of its bottom position is within the range of 1725ml±5ml of fluid in the cone hopper 1. By lifting the slide rod 8 upward, it slides upward on the inner wall of the L-shaped plate 7 and moves the float ball 17 to the upper part of the cone hopper 1. Then, the adjusted cement slurry is poured into the cone hopper 1. When the cement slurry exceeds the drain hole 14 at the horizontal plane of the cone hopper 1, it will overflow from the drain hole 14 and then be discharged into the receiving box 6 along the discharge pipe 5. The overflow will stop when the horizontal plane of the overflowed cement slurry is lower than the bottom of the drain hole 14. At this time, the volume of cement slurry in the cone hopper 1 is within the range of 1725ml±5ml. Then, the slide rod 8 is lowered naturally, so that the bottom of the float ball 17 floats on the surface of the cement slurry.

[0031] Subsequently, by operating the controller 9, the solenoid valve 12 is opened. When the solenoid valve 12 opens to discharge cement slurry, the electronic timer 10 linked to it starts timing. Cement slurry is continuously discharged from the discharge pipe 11 into the discharge basin 4, causing the level of cement slurry in the cone hopper 1 to drop. This causes the position of the float 17 to change and drives the slide bar 8 to slide down until the cement slurry is completely discharged. The float 17 then sinks completely into the discharge pipe 11, while the slide bar 8 slides the pressure plate 16 completely to the top of the L-shaped plate 7. This causes the pressure plate 16 to generate contact pressure on the touch sensor 18. When the touch sensor 18 receives contact pressure, it generates an electrical signal to the controller 9. The controller 9 then controls the electronic timer 10 to stop timing. This completes the determination of the flowability of cement slurry. If the outflow time of cement slurry in the cone hopper 1 is controlled within a certain range, it indicates that the cement is qualified; otherwise, it is unqualified.

[0032] Next, lift the baffles 21 on both sides of the material drop basin 4 upwards so that the insertion hole 22 is disengaged from the outer wall of the positioning bolt 20, so that the material drop basin 4 can be removed from the inner side of the annular plate 3 and the cement slurry that has been received can be cleaned. The receiving box 6 is then pulled out from between the corresponding retaining frames 13, and the slot 15 is disengaged from the bottom outer wall of the retaining frame 13. Then the cement slurry that has been received in the receiving box 6 is cleaned.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test apparatus for determining the fluidity of cement slurry, comprising a cone hopper (1), characterized in that: The cone bucket (1) has drainage holes (14) on the upper part of the four sides of its outer wall. The outer wall of the cone bucket (1) is fixedly connected to a discharge pipe (5) outside the drainage hole (14). The lower side of the outer wall of the discharge pipe (5) is fixedly connected to a retaining frame (13). The inner wall of the bottom end of the retaining frame (13) is provided with a receiving box (6). The upper side of the receiving box (6) is provided with a slot (15). The shape of the outer wall of the bottom end of the retaining frame (13) matches the shape of the inner wall of the slot (15). The bottom end of the cone bucket (1) is fixedly connected to a discharge pipe (11). The outer wall of the discharge pipe (11) is equipped with a solenoid valve (12). The bottom of the outer wall of the cone bucket (1) is fixedly connected to a bracket (2). The lower side of the outer wall of the bracket (2) is fixedly connected to an annular plate (3).

2. The cement slurry fluidity testing device according to claim 1, characterized in that: The inner wall of the annular plate (3) is fixedly connected to the left and right ends of the extension plate (19), and a material drop basin (4) is provided between the two extension plates (19).

3. The cement slurry fluidity testing device according to claim 2, characterized in that: The upper sides of both ends of the material feeding basin (4) are fixedly connected with baffles (21), and the inner walls of the baffles (21) are provided with insertion holes (22) on opposite sides.

4. The cement slurry fluidity testing device according to claim 2, characterized in that: The extension plate (19) is fixedly connected to a positioning bolt (20) on the opposite side of its top end, and the shape of the top end of the positioning bolt (20) matches the shape of the inner wall of the insertion hole (22).

5. The cement slurry fluidity testing device according to claim 1, characterized in that: An L-shaped plate (7) is fixedly connected to the right side of the top of the cone (1), and a sliding rod (8) is slidably connected to the inner wall of the left side of the top of the L-shaped plate (7).

6. The cement slurry fluidity testing device according to claim 5, characterized in that: The top of the L-shaped plate (7) is fixedly connected to a pressure sensor (18) on the left side of the slide rod (8), and the top of the slide rod (8) is fixedly connected to a pressure plate (16).

7. The cement slurry fluidity testing device according to claim 5, characterized in that: A float (17) is fixedly connected to the bottom end of the slide bar (8), and the diameter of the float (17) is smaller than the diameter of the inner wall of the discharge pipe (11).

8. The cement slurry fluidity testing device according to claim 1, characterized in that: An electronic timer (10) is installed on the front side of the top of the annular plate (3), and a controller (9) is installed on the right end of the annular plate (3).

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