Concrete proportioning experimental device

Abstract

A concrete proportioning experimental device belongs to the technical field of concrete experiments and comprises a bottom bin, the right side of the bottom bin is communicated with a shell, a partition plate is mounted at the top end of the bottom bin, a through cavity is formed in the middle of the partition plate, a first motor is mounted on the upper surface of the shell, and the output end of the first motor is connected with a first rotating shaft. The bottom end of the first rotating shaft extends into the inner cavity of the shell and is rotationally connected with the bottom end of the inner cavity of the shell. According to the utility model, concrete samples can be uniformly dried through the plurality of autorotation and revolution sample placing boxes, so that the influence on the accuracy of water-cement ratio measurement caused by non-uniform drying of the concrete samples due to over-high or over-low local temperature is avoided, moisture can be more sufficiently evaporated under the uniform drying condition, the measurement precision is improved, and the accuracy of water-cement ratio measurement is improved. Multiple groups of guide plates swing in a reciprocating manner and are matched with heat dissipation of the heating pipe, so that hot air circularly flows in the box, a concrete sample is uniformly heated, and the overall temperature uniformity of an inner cavity of the top bin is prevented from being influenced by over-high temperature near the heating pipe.

Description

Technical Field

[0001] This utility model belongs to the field of concrete experimental technology, specifically relating to a concrete mix proportioning experimental device. Background Technology

[0002] The concrete mix design test mainly examines the following items: slump, bleeding rate, setting time, compressive strength, air content, crack resistance, elastic modulus, frost resistance, abrasion resistance, and impermeability.

[0003] A related technology (publication number CN212680884U) discloses a mixing device for asphalt concrete proportioning experiments. This mixing device, through the design of a cylindrical box, incorporates crushing, stirring, and heating functions, making the mixing device miniaturized and suitable for laboratory use. Through the cooperation of a movable plate, a first motor, a second roller, a pusher, and a screw, and by rotating the screw to adjust the distance between the second and first rollers, asphalt concrete with different particle sizes can be proportioned, making the mixing device convenient to use.

[0004] Currently, the water-cement ratio (DCR) of concrete is a crucial testing item. The DCR is the ratio of the mass of water to the mass of cement in concrete. The drying method is a commonly used method for testing the DCR. This method involves heating the concrete to evaporate the water, then measuring the mass of the remaining solids to determine the cement and water content. However, when using the drying method for concrete DCR testing, uneven drying of the concrete sample due to excessively high or low local temperatures can affect the accuracy of the measurement. Utility Model Content

[0005] To address the problem in existing technologies where the drying method for testing the water-cement ratio of concrete is prone to uneven drying due to localized excessively high or low temperatures, thus affecting the accuracy of water-cement ratio measurements, this invention provides a concrete mix proportioning experimental device. Through multiple rotating and revolving sample placement boxes, it achieves uniform drying of concrete samples, avoiding uneven drying caused by localized excessively high or low temperatures, which would affect the accuracy of water-cement ratio measurements. Uniform drying conditions allow for more complete evaporation of moisture, improving measurement accuracy. The specific technical solution is as follows:

[0006] A concrete mix proportioning experimental device includes a base silo, a shell connected to the right side of the base silo, a partition plate installed at the top of the base silo, a through cavity in the middle of the partition plate, a first motor installed on the upper surface of the shell, a first rotating shaft connected to the output end of the first motor, and the bottom end of the first rotating shaft extending into the inner cavity of the shell and rotatably connected to the bottom end of the inner cavity of the shell, a first gear fixedly installed on the first rotating shaft, a turntable rotatably connected to the inner cavity of the base silo via a bearing seat, a plurality of connecting blocks fixedly connected to the side wall of the turntable, a gear ring fixedly connected to the outer side of the connecting blocks, and the gear ring meshing with the first gear, a second motor installed in the inner cavity of the base silo, a second rotating shaft connected to the output end of the second motor, and the second rotating shaft extending upward through the turntable, a second gear fixedly installed on the second rotating shaft, and a plurality of rotating components equidistantly arranged circumferentially on the second gear.

[0007] In the above technical solution, each set of rotating components includes a third rotating shaft fixedly installed on the upper surface of the turntable, a third gear fixedly installed on the third rotating shaft, and the third gear rotatably connected to the side wall of the second gear, and a sample placement box fixedly installed at the top of the third rotating shaft.

[0008] In the above technical solution, a top compartment is installed at the top of the bottom compartment, the third rotating shaft passes through the cavity opened in the middle of the partition plate, a cover is installed at the top of the top compartment, and an opening fan is provided at the top of the cover for rotational opening and closing.

[0009] In the above technical solution, multiple heating tubes are equidistantly arranged along the circumference of the inner sidewall of the top compartment, and a power system is provided on the sidewall of the top compartment, and the power system is electrically connected to the heating tubes.

[0010] In the above technical solution, a third motor is mounted on the top of the housing via a motor frame, the output end of the third motor is connected to a fourth rotating shaft, a fourth gear is fixedly mounted on the fourth rotating shaft, a ring is rotatably arranged on the side wall of the top compartment, a number of teeth are equidistantly arranged on the side wall of the ring, and the side wall of the fourth gear meshes with the gap between two adjacent teeth.

[0011] In the above technical solution, the inner cavity of the top compartment is provided with multiple flow guiding components. Each flow guiding component includes a rotating pin rotatably connected to the ring body, and a mounting seat that penetrates the side wall of the top compartment. A swing rod is rotatably connected through the mounting seat, and the outer end of the swing rod is rotatably connected to the rotating pin. A connecting seat is fixedly installed on the inner end of the swing rod, and a flow guiding plate is fixedly installed on the side wall of the connecting seat.

[0012] In the above technical solution, the guide plate is configured as a wedge-shaped plate.

[0013] The concrete mix proportioning experimental device of this utility model has the following advantages compared with the prior art:

[0014] I. Addressing the issue that uneven drying of concrete samples, caused by excessively high or low local temperatures, can affect the accuracy of water-cement ratio measurements when using the drying method for concrete water-cement ratio testing, this invention utilizes the cooperation of a second and third gear to enable the rotation of the third rotating shaft and the samples placed in the sample placement box. This ensures that the samples in the sample placement box are heated from the heating tube, resulting in more uniform heating. The first gear, gear ring, and turntable cause the opening fan and the samples in multiple sample placement boxes to revolve within the top chamber, further ensuring uniform heating. This invention, through the rotation and revolving of multiple sample placement boxes, achieves uniform drying of the concrete samples, avoiding uneven drying caused by excessively high or low local temperatures, which affects the accuracy of water-cement ratio measurements. Uniform drying conditions allow for more complete evaporation of moisture, improving measurement accuracy.

[0015] Second, this utility model can provide a drying environment for the inner cavity of the top chamber through the heating tube, ensuring that the samples in the multiple sample placement boxes in the top chamber are heated uniformly;

[0016] Third, this utility model is equipped with multiple sample placement boxes, which can simultaneously conduct multiple sets of control experiments. Compared with a single experiment, it is more representative. Taking the average value of multiple sample tests can better represent the accuracy of the test results.

[0017] Fourth, this utility model is also equipped with a third motor, a fourth rotating shaft, a fourth gear, a ring body, and teeth, which can cause multiple sets of guide plates to swing back and forth, and work with the heating tube to dissipate heat, so that hot air circulates in the box, ensuring that the concrete sample is heated evenly, and avoiding the temperature near the heating tube from being too high and affecting the overall temperature uniformity of the top chamber cavity.

[0018] Fifth, this utility model can realize the synchronous reciprocating swing of multiple sets of guide plates through the reciprocating rotation of the ring body, which has higher coordination and the guiding function of all guide plates can play a synchronous role, realizing the flow of hot air in the top compartment cavity more quickly and effectively.

[0019] In summary, this invention, through multiple sample placement boxes that rotate on their own axis and revolve around the sun, enables uniform drying of concrete samples. This avoids uneven drying caused by excessively high or low local temperatures, which could affect the accuracy of water-cement ratio measurements. Uniform drying conditions allow for more complete evaporation of moisture, improving measurement accuracy. Multiple sets of guide plates oscillate back and forth, working in conjunction with heating tubes to circulate hot air within the chamber, ensuring uniform heating of the concrete samples and preventing excessively high temperatures near the heating tubes from affecting the overall temperature uniformity of the top chamber cavity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the bottom compartment of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the top compartment of this utility model;

[0022] Figure 3 This is a top view of the sample placement box of this utility model.

[0023] Figure 4 This is a top view of the second gear of this utility model.

[0024] Figure 5 This is a bottom view of the turntable structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the ring body of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the guide plate of this utility model;

[0027] Figures 1 to 7 In the middle, 1. bottom compartment, 2. shell, 3. partition plate, 4. first motor, 5. first rotating shaft, 6. first gear, 7. gear ring, 8. connecting block, 9. turntable, 10. second motor, 11. second rotating shaft, 12. second gear, 13. third rotating shaft, 14. third gear, 15. sample placement box, 16. top compartment, 17. cover, 18. opening fan, 19. heating tube, 20. power system, 21. third motor, 22. fourth rotating shaft, 23. fourth gear, 24. ring body, 25. teeth, 26. mounting base, 27. swing rod, 28. rotating pin, 29. connecting base, 30. guide plate. Detailed Implementation

[0028] The following are specific implementation cases and appendices. Figures 1 to 7 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0029] Main references Figures 1 to 7As shown, a concrete mix proportioning experimental device includes a bottom chamber 1, with a shell 2 connected to the right side of the bottom chamber 1. A partition plate 3 is installed at the top of the bottom chamber 1, with a through cavity in the middle of the partition plate 3. A first motor 4 is installed on the upper surface of the shell 2, and the output end of the first motor 4 is connected to a first rotating shaft 5. The bottom end of the first rotating shaft 5 extends into the inner cavity of the shell 2 and is rotatably connected to the bottom end of the inner cavity of the shell 2 via a bearing. A first gear 6 is fixedly installed on the first rotating shaft 5. A turntable 9 is rotatably connected to the inner cavity of the bottom chamber 1 via a bearing seat. Multiple connecting blocks 8 are fixedly connected to the side wall of the turntable 9, and a toothed ring 7 is fixedly connected to the outside of the connecting blocks 8. The toothed ring 7 meshes with the first gear 6. When the first motor 4 is turned on, it drives the first rotating shaft 5 and the first gear 6 to rotate, thereby causing the toothed ring 7 meshing with the side wall of the first gear 6 to rotate. The toothed ring 7 drives the connecting blocks 8 and the turntable 9 to rotate synchronously. A second motor 10 is installed in the inner cavity of the bottom chamber 1. The output end is connected to a second rotating shaft 11, which extends upward through the turntable 9. A second gear 12 is fixedly installed on the second rotating shaft 11. The second rotating shaft 11 and the second gear 12 are rotated by the activated second motor 10. Multiple sets of rotating components are equidistantly arranged around the second gear 12. Each set of rotating components includes a third rotating shaft 13 fixedly installed on the upper surface of the turntable 9. A third gear 14 is fixedly installed on the third rotating shaft 13 and is rotatably connected to the side wall of the second gear 12. A sample placement box 15 is fixedly installed at the top of the third rotating shaft 13. The second rotating shaft 11 and the second gear 12 are rotated by the activated second motor 10, so as to cause the multiple sets of third gears 14 connected to the side wall of the second gear 12 to rotate synchronously. The third gears 14 drive the third rotating shaft 13 and the sample placement box 15 connected to them to rotate synchronously, so as to achieve uniform heating of the sample in the sample placement box 15.

[0030] Main references Figure 1 As shown, a top chamber 16 is installed at the top of the bottom chamber 1. The third rotating shaft 13 passes through the cavity opened in the middle of the partition plate 3. A cover 17 is installed at the top of the top chamber 16. An opening fan 18 is provided at the top of the cover 17 for rotating and opening. The opening fan 18 is opened to place the samples into the corresponding sample placement boxes 15, and then the opening fan 18 is closed. Multiple heating tubes 19 are arranged equidistantly along the circumference of the inner side wall of the top chamber 16. A power system 20 is provided on the side wall of the top chamber 16, and the power system 20 is electrically connected to the heating tubes 19. The power system 20 provides power to the multiple heating tubes 19 in the top chamber 16, causing the heating tubes 19 to heat the inner cavity of the top chamber 16. Thus, through the rotation and revolution of the sample placement boxes 15, the samples in the sample placement boxes 15 can be uniformly dried by the heating tubes 19 in the inner cavity of the top chamber 16.

[0031] Main references Figure 6As shown, a third motor 21 is mounted on the top of the housing 2 via a motor frame. The output end of the third motor 21 is connected to a fourth rotating shaft 22. A fourth gear 23 is fixedly mounted on the fourth rotating shaft 22. A ring body 24 is rotatably arranged on the side wall of the top compartment 16. Several teeth 25 are equidistantly arranged on the side wall of the ring body 24. The side wall of the fourth gear 23 meshes with the gap between two adjacent teeth 25. When the third motor 21 is turned on, it drives the fourth rotating shaft 22 and the fourth gear 23 to rotate synchronously, so that the teeth 25 drive the ring body 24 to rotate. Since the output end of the third motor 21 can rotate alternately in both directions, it can drive the ring body 24 to rotate alternately in both directions.

[0032] Main references Figure 6 and Figure 7 As shown, the inner cavity of the top chamber 16 is provided with multiple flow guiding components. Each flow guiding component includes a rotating pin 28 rotatably connected to the ring body 24, and a mounting seat 26 that passes through the side wall of the top chamber 16. A swing rod 27 passes through and is rotatably connected to the mounting seat 26, and the outer end of the swing rod 27 is rotatably connected to the rotating pin 28. A connecting seat 29 is fixedly installed on the inner end of the swing rod 27, and a flow guiding plate 30 is fixedly installed on the side wall of the connecting seat 29. As the ring body 24 rotates, it drives multiple sets of rotating pins 28 to rotate synchronously, so as to cause the swing rod 27 to swing around the rotatable connection between itself and the mounting seat 26 as the axis. That is, the connecting seat 29 and the flow guiding plate 30 connected to the end of the swing rod 27 swing. The swinging flow guiding plate 30 guides the hot air in the inner cavity of the top chamber 16, so as to achieve rapid and uniform hot air in the inner cavity of the top chamber 16.

[0033] In addition, the baffle plate 30 is designed in the shape of a wedge, thereby ensuring that the baffle plate 30 can better disperse and guide the hot air in the top compartment 16.

[0034] It is worth noting that in this application, the first motor 4, the second motor 10, and the third motor 21 are commonly used self-locking motors with lockable output terminals. When they stop, their output terminals can lock themselves and will not rotate under external force. The first motor 4, the second motor 10, and the third motor 21 are commonly used forward and reverse motors, and their output terminals can rotate in the forward or reverse direction according to the usage requirements. The third motor 21 is a stepper motor with a reciprocating output terminal that can rotate in both directions, which can meet the above usage requirements. The heating tube 19 is a heating tube used for drying that is available on the market, and its model is suitable for heating and drying the inner cavity of the top chamber 16. The power supply system 20 is an existing device that can provide power to the heating tube 19. The above-mentioned existing components will not be described in detail here.

[0035] The working principle of the concrete mix proportioning experimental device in this embodiment is as follows:

[0036] After the opening fan 18 is turned on and the samples are placed into their respective sample placement boxes 15, the opening fan 18 is turned off. The power system 20, which is turned on, provides power to the multiple heating tubes 19 in the top chamber 16, causing the heating tubes 19 to heat the interior of the top chamber 16. The second motor 10, which is turned on, drives the second shaft 11 and the second gear 12 to rotate, causing the multiple sets of third gears 14 meshing with the side walls of the second gear 12 to rotate synchronously. The third gears 14 drive their respective connected third shafts 13 and sample placement boxes 15 to rotate synchronously, causing the samples in the sample placement boxes 15 to rotate circumferentially and alternately face the heating tubes 19. Simultaneously, the first motor 4, once activated, drives the first rotating shaft 5 and the first gear 6 to rotate, causing the gear ring 7, which meshes with the side wall of the first gear 6, to rotate. The gear ring 7 drives the connecting block 8 and the turntable 9 to rotate synchronously, so that the multiple sets of third gears 14, third rotating shafts 13, and sample placement boxes 15 set on the turntable 9 revolve around the second rotating shaft 11, causing the samples in the sample placement boxes 15 to rotate in turn toward the heating tube 19. Thus, through the rotation and revolution of the sample placement boxes 15, the samples in the sample placement boxes 15 can be uniformly dried by the heating tube 19 in the inner cavity of the top chamber 16.

[0037] The third motor 21 drives the fourth shaft 22 and the fourth gear 23 to rotate synchronously, which causes the teeth 25 to drive the ring body 24 to rotate. Since the output end of the third motor 21 can rotate alternately in both directions, it can cause the fourth gear 23 to rotate alternately in both directions, which in turn causes the ring body 24 to rotate alternately in both directions. As the ring body 24 rotates, it drives multiple sets of rotating pins 28 to rotate synchronously, which causes the swing rod 27 to swing around its pivot point with the mounting base 26. This achieves the swinging of the connecting base 29 and the guide plate 30 connected to the end of the swing rod 27. The swinging guide plate 30 guides the hot air in the inner cavity of the top chamber 16, achieving rapid and uniform hot air in the inner cavity of the top chamber 16.

[0038] This invention utilizes multiple sample placement boxes 15 that rotate and revolve to achieve uniform drying of concrete samples. This avoids uneven drying of concrete samples due to excessively high or low local temperatures, which could affect the accuracy of water-cement ratio measurement. Uniform drying conditions allow for more complete evaporation of moisture, improving measurement accuracy. Multiple sets of guide plates 30 reciprocate and oscillate, working in conjunction with the heating tube 19 to dissipate heat, ensuring that hot air circulates within the chamber, guaranteeing uniform heating of the concrete samples, and preventing excessively high temperatures near the heating tube 19 from affecting the overall temperature uniformity of the inner cavity of the top chamber 16.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A concrete mix proportioning experimental device, comprising a bottom hopper (1), characterized in that: The bottom compartment (1) is connected to a shell (2) on the right side. A partition plate (3) is installed at the top of the bottom compartment (1). A through cavity is opened in the middle of the partition plate (3). A first motor (4) is installed on the upper surface of the shell (2). The output end of the first motor (4) is connected to a first rotating shaft (5). The bottom end of the first rotating shaft (5) extends into the inner cavity of the shell (2) and is rotatably connected to the bottom end of the inner cavity of the shell (2). A first gear (6) is fixedly installed on the first rotating shaft (5). A turntable (9) is rotatably connected to the inner cavity of the bottom compartment (1) through a bearing seat. The turntable (9) has multiple connecting blocks (8) fixedly connected to its side wall. A toothed ring (7) is fixedly connected to the outside of the connecting block (8), and the toothed ring (7) meshes with the first gear (6). A second motor (10) is installed in the inner cavity of the bottom chamber (1). A second rotating shaft (11) is connected to the output end of the second motor (10), and the second rotating shaft (11) extends upward through the turntable (9). A second gear (12) is fixedly installed on the second rotating shaft (11), and multiple sets of rotating components are equidistantly arranged around the second gear (12).

2. The concrete mix proportioning experimental apparatus according to claim 1, characterized in that: Each set of rotating components includes a third rotating shaft (13) fixedly installed on the upper surface of the turntable (9), a third gear (14) fixedly installed on the third rotating shaft (13), and the third gear (14) is rotatably connected to the side wall of the second gear (12). A sample placement box (15) is fixedly installed at the top of the third rotating shaft (13).

3. The concrete mix proportioning experimental apparatus according to claim 2, characterized in that: The bottom compartment (1) is equipped with a top compartment (16) at the top. The third rotating shaft (13) passes through the cavity opened in the middle of the partition plate (3) upward. The top compartment (16) is equipped with a cover (17) at the top. The top of the cover (17) is equipped with an opening fan (18) that can be rotated and opened.

4. The concrete mix proportioning experimental apparatus according to claim 3, characterized in that: The inner wall of the top chamber (16) is provided with a plurality of heating tubes (19) at equal intervals along the circumference. The side wall of the top chamber (16) is provided with a power system (20), and the power system (20) is electrically connected to the heating tubes (19).

5. The concrete mix proportioning experimental apparatus according to claim 4, characterized in that: The top of the housing (2) is equipped with a third motor (21) via a motor frame. The output end of the third motor (21) is connected to a fourth rotating shaft (22). A fourth gear (23) is fixedly installed on the fourth rotating shaft (22). A ring body (24) is provided on the side wall of the top chamber (16) in a relatively rotatable manner. A number of teeth (25) are equidistantly arranged on the side wall of the ring body (24). The side wall of the fourth gear (23) is meshed with the gap between two adjacent teeth (25).

6. The concrete mix proportioning experimental apparatus according to claim 5, characterized in that: The inner cavity of the top chamber (16) is provided with multiple flow guiding components. Each flow guiding component includes a rotating pin (28) rotatably connected to the ring body (24) and a mounting seat (26) that penetrates the side wall of the top chamber (16). A swing rod (27) is rotatably connected through the mounting seat (26), and the outer end of the swing rod (27) is rotatably connected to the rotating pin (28). A connecting seat (29) is fixedly installed on the inner end of the swing rod (27), and a flow guide plate (30) is fixedly installed on the side wall of the connecting seat (29).

7. The concrete mix proportioning experimental apparatus according to claim 6, characterized in that: The guide plate (30) is configured as a wedge-shaped plate.

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