Concrete slump test device

Abstract

The utility model relates to concrete construction quality detection equipment technical field, concretely is a kind of concrete slump test device integrating tamping, measuring function in one, a kind of concrete slump test device, including the conical frustum cylinder of vertical arrangement, its upper end is feed inlet, lower end is discharge port, the inclined tread for treading down pressure is symmetrically arranged in the lower part of the cylinder outside, so that the cylinder is attached to ground surface, handle is symmetrically arranged in the upper part of the cylinder outside, for lifting cylinder, the cover plate covering the top of cylinder, its diameter matches with the top opening of cylinder, the rammer vertically arranged in the upper part of cover plate, can be extended into the inside of cylinder, the ruler rod is sleeved in the inside of rammer, both are screw thread connection, ruler rod surface is equipped with axial scale line, end has horizontal bottom edge, axial flat surface is arranged on the outside of rammer, for forming surface contact with cylinder feed inlet, strip level bubble is arranged on the upper part of ruler rod, for indicating the vertical state of ruler rod.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete construction quality testing equipment, specifically a concrete slump test device that integrates compaction and measurement functions. Background Technology

[0002] Slump is a key indicator for measuring the fluidity of concrete. Traditional slump testing devices mainly consist of an independent cone, a tamping rod, and a ruler. Existing technology has the following drawbacks:

[0003] 1. Poor sealing of the cylinder: The bottom of the cone lacks an effective fixing structure and relies only on the operator's feet to temporarily press it down. This can easily lead to insufficient pressure and leakage of concrete from the bottom of the cylinder during filling, affecting the accuracy of the filling volume.

[0004] 2. Low measurement accuracy: It requires manual holding of a ruler vertically on the collapsed concrete surface, which is prone to reading deviation due to the tilt of the ruler, and there is no horizontal calibration device.

[0005] 3. Cumbersome and inefficient operation: The tamping rod and measuring ruler are stored separately. When measuring, the tamping rod must be removed first and then the ruler placed. The concrete shape is easily disturbed during the process, and the ruler and rod do not have a quick positioning structure. Utility Model Content

[0006] To overcome the problems of cylinder leakage, manual measurement tilt error, and inefficiency of multi-tool operation in existing technologies, this utility model provides a concrete slump test device. By sealing the foundation structure with a truncated cone cylinder and inclined pedal, and combining an integrated design of embedded ruler in the tamping rod, flat surface positioning, and bubble level calibration, a slump test device is constructed to achieve zero leakage in concrete filling, millimeter-level accuracy in slump measurement, seamless and efficient operation of tamping and measurement, and to extend tool life.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: a concrete slump test device, comprising a vertically arranged frustum-shaped cylinder, with an inlet at the upper end and an outlet at the lower end; an inclined pedal symmetrically arranged on the lower part of the outer side of the cylinder for stepping down to press the cylinder into contact with the ground surface; a handle symmetrically arranged on the upper part of the outer side of the cylinder for lifting the cylinder; a cover plate covering the top of the cylinder, the diameter of which matches the opening at the top of the cylinder; a tamping rod vertically arranged on the upper part of the cover plate, which can extend into the cylinder; a ruler sleeved inside the tamping rod, the two being threaded together, the ruler having axial graduation lines on its surface and a horizontal bottom edge at its end; an axial flat surface arranged on the outer side of the tamping rod for forming surface contact with the inlet of the cylinder; and a strip-shaped spirit level on the upper part of the ruler for indicating the vertical state of the ruler.

[0008] In the aforementioned concrete slump test device, both the pedal and the handle are fixed to the cylinder by welding.

[0009] In the concrete slump test apparatus described above, the end of the tamping rod has a hemispherical structure.

[0010] The concrete slump test apparatus described above has anti-slip textures on the surface of the end of the tamping rod.

[0011] The concrete slump test device described above has a lifting ring at the top of the measuring rod.

[0012] In the aforementioned concrete slump test apparatus, the strip-shaped spirit level is located near the pull ring on the measuring rod.

[0013] In the concrete slump test apparatus described above, the flat surface extends linearly along the axial direction of the tamping rod, and its edge is aligned with the scale line of the ruler.

[0014] The beneficial effects of this utility model are:

[0015] 1. The lever-type downward pressure amplification mechanism generated by the inclined pedal welding structure makes the bottom of the cylinder fit with the ground surface in an ultra-tight manner, completely eliminating leakage during the concrete filling process and ensuring that the volume of concrete inside the cylinder is constant and meets the standard test conditions.

[0016] 2. Relying on the real-time feedback of the vertical status by the integrated bar spirit level, the operator can quickly make fine adjustments to the angle, reduce the verticality deviation of the spirit level, and further eliminate the lateral sliding error by the flat surface positioning structure, so as to achieve accurate measurement of the slump.

[0017] 3. The hemispherical tamping rod end disperses the impact force of the aggregate through curved contact, and the anti-slip texture increases hand stability and extends the service life of the core components. Attached Figure Description

[0018] The present invention will be further described below with reference to the embodiments and examples.

[0019] Figure 1 This is a three-dimensional structural diagram of an embodiment.

[0020] Figure 2 This is a front view structural diagram of an embodiment.

[0021] Figure 3 This is a side view of the structure of an embodiment.

[0022] Figure 4 This is a cross-sectional structural diagram of an embodiment.

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of a tamping rod.

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the ruler.

[0025] In the diagram: 1. Cylinder; 2. Pedal; 3. Handle; 4. Cover plate; 5. Tamping rod; 6. Ruler; 7. Bottom edge; 8. Pull ring; 9. Flat surface; 10. Strip level. Detailed Implementation

[0026] This embodiment details a concrete slump testing device, designed to provide a more accurate and convenient tool for concrete slump testing, thereby meeting the stringent requirements for concrete quality testing in construction engineering. Figure 1-6 As shown, the core component of this slump test device is a vertically arranged cylinder 1. The cylinder 1 has a hollow interior and a frustum-shaped structure that is narrower at the top and wider at the bottom. This frustum-shaped design has been verified through long-term practice. Its shape, which is narrower at the top and wider at the bottom, conforms to the natural flow characteristics of concrete during the slump process and can accurately reflect the slump of concrete under its own weight. The upper end of the cylinder 1 is the inlet. The size of the inlet is carefully designed to ensure that the concrete can be smoothly filled into the cylinder 1 without being too large, which would cause the concrete to spill or be unevenly distributed during the filling process. In actual operation, the operator can slowly and evenly pour the concrete into the cylinder 1 through the inlet to ensure that the concrete forms a relatively uniform initial state in the cylinder 1. The lower end of the cylinder 1 is the outlet. The size and shape of the outlet have an important influence on the flow rate and slump pattern of the concrete. The design of the outlet should ensure that the concrete can flow freely and smoothly after the cylinder 1 is lifted, and at the same time, the flow of the concrete should not be hindered by the outlet being too small, which would affect the measurement results of the slump.

[0027] Symmetrically arranged on the lower outer side of the cylinder 1 are foot pedals 2, which are inclined. This inclined arrangement is not arbitrary but has been verified through mechanical analysis and practice. Compared with a horizontal arrangement, the inclined pedals 2 can significantly increase the range of motion when pressing down. When the operator steps on the pedals 2, the inclined angle allows the foot to apply downward pressure more naturally, thus generating greater downward force. Greater downward force is crucial for the tight fit between the cylinder 1 and the ground surface. During the concrete filling process, if there is a gap between the cylinder 1 and the ground surface, the concrete... Soil may seep out from the gaps, leading to inaccurate concrete filling and affecting the slump measurement results. The strong downward pressure generated by stepping on the pedal 2 can make the cylinder 1 firmly adhere to the ground surface, effectively preventing concrete leakage and ensuring the accuracy of the measurement process. The pedal 2 and the cylinder 1 are connected by welding. Welding is a high-strength connection method that can ensure that the connection between the pedal 2 and the cylinder 1 is firm and will not loosen or fall off during operation. At the same time, the welding process can ensure the sealing of the connection, further preventing concrete from seeping out from the connection.

[0028] A lifting handle 3 is symmetrically arranged on the upper outer side of the cylinder 1. The design of the handle 3 fully considers the principles of ergonomics. Its shape and size are suitable for the operator's hand grip. The operator can easily hold the handle 3 and apply an upward lifting force. After the concrete filling and compaction operations are completed, the cylinder 1 needs to be lifted from the concrete in order to observe the concrete collapse. The presence of the handle 3 makes this operation simple and convenient. The operator does not need to directly contact the cylinder 1, avoiding the inconvenience caused by concrete sticking to the surface of the cylinder 1. The handle 3 is also connected to the cylinder 1 by welding. The welding connection ensures the connection strength between the handle 3 and the cylinder 1. During the lifting of the cylinder 1, the handle 3 can withstand a large pulling force without breaking or deforming, ensuring the safety of the operation.

[0029] A cover plate 4 is arranged on the top of the cylinder 1. The diameter of the cover plate 4 is exactly the same as the top opening size of the cylinder 1. The purpose is to ensure that the cover plate 4 will not fall into the cylinder 1. If the cover plate 4 is too small, it may accidentally fall into the cylinder 1 during operation, affecting the filling and compaction of concrete. If the cover plate 4 is too large, it will not be able to tightly cover the top of the cylinder 1, causing the concrete to overflow from the top during filling. The main function of the cover plate 4 is to collect and hold the tamping rod 5 and the ruler 6.

[0030] A tamping rod 5, which can extend into the cylinder 1, is vertically arranged at the center of the upper part of the cover plate 4. The tamping rod 5 is threadedly connected to the cover plate 4, which has the advantages of convenient installation and disassembly. Operators can easily install or remove the tamping rod 5 from the cover plate 4 as needed. The main function of the tamping rod 5 is to compact the concrete inside the cylinder 1. During the concrete filling process, due to the fluidity of the concrete, there may be some voids or uneven areas inside. By using the tamping rod 5 to compact the concrete, the concrete can be made denser, reducing internal voids and improving the quality of the concrete and the accuracy of slump measurement. The end of the tamping rod 5 has a hemispherical structure. This structural design is carefully considered. Compared with the traditional straight cylindrical structure with more obvious edges, the hemispherical structure can effectively... To reduce frictional loss during the compaction process, the tamping rod 5 needs to be in constant contact and friction with the concrete. If the end is angular, it is easy to collide and wear with the aggregate in the concrete, which will shorten the service life of the tamping rod 5. The hemispherical structure can reduce direct collision with the aggregate, reduce friction, and extend the service life of the tamping rod 5. At the same time, the end of the tamping rod 5 is designed with anti-slip texture. When the operator holds the tamping rod 5 for compaction, the anti-slip texture can increase the friction between the hand and the tamping rod 5, preventing the tamping rod 5 from slipping from the hand. During the compaction process, a certain amount of force needs to be applied. If the surface of the tamping rod 5 is smooth, it is easy to slip due to sweaty hands or improper force, which will not only affect the compaction effect, but may also cause injury to the operator. The anti-slip texture design effectively solves this problem and improves the safety and stability of the operation.

[0031] The tamping rod 5 has a cylindrical structure with an open top and a closed bottom. A ruler 6, threadedly connected to the tamping rod 5, is fitted inside. This threaded connection allows the ruler 6 to be adjusted vertically within the tamping rod 5, facilitating measurements by the operator. The ruler 6 has graduations along its axial direction on its surface. These graduations are rigorously calibrated to accurately reflect the slump height of the concrete. The graduations are designed to facilitate reading the slump value. By observing the position of the graduations on the ruler 6, the slump can be quickly and accurately determined. The ruler 6 has a horizontal bottom edge 7 at its end. When measuring the slump, the bottom edge 7 of the ruler 6... The ruler 6 is placed vertically at the highest point of the collapsed cement. The horizontal bottom edge 7 ensures that the ruler 6 is in full contact with the concrete surface, making the measurement results more accurate. If the bottom edge 7 is not horizontal, the ruler 6 may tilt, thus affecting the accuracy of the measurement results. The top of the ruler 6 has a pull ring 8 for easy lifting and rotation. The operator can easily lift and rotate the ruler 6 through the pull ring 8. During the measurement process, the tamping rod 5 needs to be placed horizontally at the feed port at the top of the cylinder 1 first, and then the ruler 6 is rotated out from the inside of the tamping rod 5 so that the bottom edge 7 is vertically placed at the highest point of the collapsed cement. The design of the pull ring 8 makes this operation easier and more convenient, and the operator can easily control the position and height of the ruler 6.

[0032] Because the tamping rod 5 has a cylindrical structure, it makes line contact with the feed inlet. This line contact method has certain problems, namely, the tamping rod 5 is prone to slippage during horizontal placement. Once the tamping rod 5 slips, the measurement position of the ruler 6 will be inaccurate, thus affecting the measurement results. To solve this problem, a flat surface 9 is provided on the outer side of the tamping rod 5, which is linearly arranged along its axis. The flat surface 9 abuts against the feed inlet, thus forming a surface contact. Compared with line contact, surface contact can significantly reduce the probability of the tamping rod 5 slipping. The increased contact area between the flat surface 9 and the feed inlet also increases the friction, making the tamping rod 5 more stable during horizontal placement and less prone to slippage. Moreover, the edge of the flat surface 9 is easier to align with the scale on the upper part of the ruler 6. During measurement, it is necessary to accurately read the position of the scale line on the ruler 6. The straight edge of the flat surface 9 provides a clear reference line for the operator, making it easier for the operator to align the edge of the flat surface 9 with the scale on the upper part of the ruler 6, thereby effectively improving the measurement accuracy of slump.

[0033] To further improve the measurement accuracy of the ruler 6, a bar-shaped bubble level 10 is added to the upper part of the ruler 6 near the pull ring 8. The bar-shaped bubble level 10 is a commonly used leveling tool, containing liquid and an air bubble. When the bubble is in the center of the level level, it indicates that the ruler 6 is horizontal. When the ruler 6 is placed at the highest point of the concrete collapse, the operator can adjust the position of the ruler 6 by observing the bar-shaped bubble level 10. If the bubble deviates from the center, it indicates that the ruler 6 is tilted. In this case, the angle of the ruler 6 needs to be adjusted to bring the bubble back to the center position. Ensuring that the ruler 6 is in an accurate vertical position and avoiding increased measurement errors due to the tilt of the ruler 6 is very important. If the measuring rod 6 is tilted, the measured concrete slump height will be inaccurate, affecting the final slump result. With the assistance of the bar level 10, the operator can promptly detect the tilt of the measuring rod 6 and make adjustments to ensure the accuracy of the measurement results. The slump can be obtained by subtracting the height difference between the height of the cylinder and the highest point after the concrete slumps. The height of the cylinder is known during use. During the production of the slump test device, the height of the cylinder is precisely measured and marked. When taking measurements, the operator only needs to accurately measure the height of the highest point after the concrete slumps according to the above steps, and then subtract this height from the height of the cylinder to obtain the accurate slump value.

[0034] In use, first place the slump test device on a flat, firm surface, ensuring the surface will not deform under the pressure of the cylinder 1. The operator steps on the pedal 2 to ensure the cylinder 1 is in close contact with the ground, preventing shaking or displacement during concrete filling. Then, place the cover plate 4 on top of the cylinder 1, ensuring it fits snugly to prevent concrete overflow. Next, slowly and evenly pour the concrete into the cylinder 1 through the inlet. During filling, use the tamping rod 5 to initially compact the concrete, ensuring even distribution within the cylinder 1. Tamping should be performed in a specific order and with appropriate force to avoid over- or under-tamping. When the concrete reaches the top of the cylinder 1, use the tamping rod 5 again to fully compact the concrete, ensuring a smooth surface. After compaction, smooth the concrete surface with a trowel, then quickly remove the tamping rod. The tamping rod 5 is placed horizontally at the feed inlet at the top of the cylinder 1, ensuring that the flat surface 9 is in close contact with the feed inlet. The ruler 6 is then unscrewed from inside the tamping rod 5 using the pull ring 8, so that the bottom edge 7 of the ruler 6 stands vertically at the highest point of the collapsed cement. During the unscrewing of the ruler 6, the bar spirit level 10 should be carefully observed to ensure that the ruler 6 is in a vertical position. The scale mark on the upper part of the ruler 6 is located at the point where the line formed by the contact between the tamping rod 5 and the feed inlet is located. The scale value is read, and the slump of the concrete is obtained by subtracting the read scale value from the height of the cylinder. After the measurement is completed, the cylinder 1 is lifted off the concrete, and the residual concrete inside the cylinder 1 is cleaned. During cleaning, it can be rinsed with clean water and then wiped dry with a clean cloth. The tamping rod 5, ruler 6, and other components are cleaned and maintained. Each component is checked for damage or wear, and if necessary, it is replaced in time. The slump test device is stored in a dry and ventilated place to avoid moisture and rust.

[0035] The concrete slump test device in this embodiment improves the accuracy of slump measurement and ease of operation by rationally designing the structure and connection of components such as the cylinder, pedal, handle, cover plate, tamping rod, and ruler, and by adding auxiliary measuring devices such as the strip level. It has high practical value and promotion significance.

Claims

1. A concrete slump test apparatus, characterized in that: include A vertically arranged frustum-shaped cylinder, with the upper end being the feed inlet and the lower end being the discharge outlet; An inclined foot pedal symmetrically located on the lower outer side of the cylinder is used to press down the cylinder to make it fit against the ground. The handles, symmetrically located on the upper outer side of the cylinder, are used to lift the cylinder. A cover plate that covers the top of the cylinder, the diameter of which matches the opening at the top of the cylinder; The tamping rod, which is vertically mounted on the upper part of the cover plate, can extend into the inside of the cylinder. A ruler is fitted inside the tamping rod, and the two are threaded together. The surface of the ruler has axial graduation lines, and the end has a horizontal bottom edge. An axial flat surface located on the outside of the tamping rod is used to form a surface contact with the feed inlet of the cylinder; A bar-shaped spirit level is placed on the upper part of the ruler to indicate the verticality of the ruler.

2. The concrete slump test apparatus according to claim 1, characterized in that: Both the pedal and the handle are fixed to the cylinder by welding.

3. The concrete slump test apparatus according to claim 1, characterized in that: The end of the tamping rod has a hemispherical structure.

4. The concrete slump test apparatus according to claim 1, characterized in that: The end surface of the tamping rod is provided with anti-slip texture.

5. The concrete slump test apparatus according to claim 1, characterized in that: The top of the ruler is equipped with a pull ring for lifting.

6. The concrete slump test apparatus according to claim 1, characterized in that: The bar-shaped bubble level is located near the pull ring on the ruler.

7. The concrete slump test apparatus according to claim 1, characterized in that: The flat surface extends linearly along the tamping rod axis, and its edge is aligned with the scale line of the ruler.

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