Preparation device of concrete sample with low porosity and high surface smoothness
By combining a vibrating rotating chassis and a reset mechanism, the problems of high porosity and poor surface smoothness of concrete samples were solved, and concrete samples with low porosity and high surface smoothness were prepared.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LONGJIAN ROAD & BRIDGE CO LTD
- Filing Date
- 2025-04-22
- Publication Date
- 2026-04-14
AI Technical Summary
In traditional preparation methods, concrete samples have high porosity and poor surface smoothness, making it difficult to effectively remove microbubbles and microcracks through single vibration or static pressure molding techniques.
A vibrating rotating chassis drives the concrete sample mold to rotate and vibrate. Combined with the design of a reset mechanism and a return spring, the combination of rotation and vibration enhances the compaction of the concrete and reduces air bubbles and capillary pores.
It reduced the porosity of the concrete samples, improved surface smoothness, and reduced the occurrence of pitting and sand marks.
Smart Images
Figure CN224122258U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of concrete sample preparation technology, specifically relating to a concrete sample preparation device with low porosity and high surface smoothness. Background Technology
[0002] Porosity and surface finish of concrete samples are key indicators for evaluating their mechanical properties and appearance quality. Traditional preparation methods often employ single vibration or static pressure molding techniques, which suffer from insufficient vibration energy, making it difficult to expel micro-bubbles and resulting in high porosity (typically >10%). Furthermore, micro-cracks easily form at the aggregate-slurry interface, affecting the surface finish of the concrete samples. Utility Model Content
[0003] The purpose of this invention is to provide a concrete sample preparation device with low porosity and high surface smoothness, which can reduce porosity and improve the surface smoothness of the sample during the concrete sample preparation process.
[0004] The specific technical solution adopted by this utility model is as follows:
[0005] A concrete sample preparation device with low porosity and high surface smoothness includes a vibrating rotating base, on which a concrete sample mold and a resetting mechanism are mounted. The concrete sample mold is slidably connected to the upper side of the vibrating rotating base. The vibrating rotating base can drive the concrete sample mold to rotate and vibrate. The concrete sample mold can slide on the vibrating rotating base during rotation.
[0006] The reset mechanism is connected to the concrete sample mold via a transmission, and is used to drive the sliding concrete sample mold to reset.
[0007] Furthermore, the vibrating rotating chassis includes a fixed base plate, a servo motor is fixedly connected to the lower side of the fixed base plate, an inner shaft located on the upper side of the fixed base plate is fixedly connected to the output end of the servo motor, an outer sliding sleeve is vertically slidably connected to the outer side of the inner shaft, a movable base plate is fixedly connected to the upper side of the outer sliding sleeve, the concrete sample mold is slidably connected to the upper side of the movable base plate, a plurality of lower protrusions arranged in a ring array are fixedly connected to the upper side of the fixed base plate, and an upper protrusion opposite to the lower protrusions is fixedly connected to the lower side of the movable base plate.
[0008] Furthermore, a wave-shaped or zigzag-shaped guide groove is provided on the upper side of the movable base plate, and two round rods are fixedly connected to the lower side of the concrete sample mold, with both round rods slidably connected inside the guide groove.
[0009] Furthermore, the reset mechanism includes a fixed triangular block and a movable triangular block, the movable triangular block being fixedly connected to the outside of the concrete sample mold, and the fixed triangular block being fixedly connected to the fixed base plate.
[0010] Furthermore, a slider is fixedly connected to the outside of the concrete sample mold, a sliding rod is slidably connected inside the slider, a fixing plate is fixedly connected to both ends of the sliding rod, the fixing plate is fixedly connected to the movable base plate, and a return spring is sleeved on the outside of the sliding rod between the slider and the fixing plate.
[0011] Furthermore, a washer is fitted onto the outer side of the slide rod between the slider and the return spring.
[0012] The technical effects achieved by this utility model are as follows:
[0013] This invention relates to a concrete sample preparation device with low porosity and high surface smoothness. The device uses a vibrating rotating base to drive the concrete sample mold to vibrate up and down and move horizontally. The vibration force of the concrete sample mold and the impact force of the repeated movement make the concrete inside the concrete sample mold more compact, allowing air bubbles to be expelled and reducing voids. At the same time, it can reduce capillary pores formed by bleeding, lower porosity, reduce surface pitting or sand marks, and improve the surface smoothness of the sample. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a partial structural schematic diagram of the present invention;
[0016] Figure 3 This is a cross-sectional structural diagram of the present invention;
[0017] Figure 4 This is a utility model Figure 1 A magnified view of a portion of point A in the middle.
[0018] The attached diagram lists the components represented by each number as follows:
[0019] 1. Fixed base plate; 2. Servo motor; 3. Inner shaft; 4. Outer sliding sleeve; 5. Movable base plate; 6. Concrete sample mold; 7. Guide groove; 8. Round rod; 9. Movable triangular block; 10. Fixed triangular block; 11. Slider; 12. Sliding rod; 13. Fixed plate; 14. Return spring; 15. Lower protrusion; 16. Upper protrusion; 17. Shim. Detailed Implementation
[0020] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.
[0021] like Figure 1 - As shown in the figure, a concrete sample preparation device with low porosity and high surface smoothness includes a vibrating rotating base, on which a concrete sample mold 6 and a reset mechanism are installed.
[0022] like Figures 1-3 As shown, the vibrating rotating chassis includes a fixed base plate 1. A servo motor 2 is fixedly connected to the lower side of the fixed base plate 1. An inner shaft 3 located on the upper side of the fixed base plate 1 is fixedly connected to the output end of the servo motor 2. An outer sliding sleeve 4 is vertically slidably connected to the outer side of the inner shaft 3. A movable base plate 5 is fixedly connected to the upper side of the outer sliding sleeve 4. A concrete sample mold 6 is slidably connected to the upper side of the movable base plate 5. At this time, by starting the servo motor 2, kinetic energy can be transmitted to the movable base plate 5 through the inner shaft 3 and the outer sliding sleeve 4, causing the movable base plate 5 to rotate. A plurality of lower protrusions 15 arranged in a ring array are fixedly connected to the upper side of the fixed base plate 1. An upper protrusion 16 opposite to the lower protrusions 15 is fixedly connected to the lower side of the movable base plate 5. During the rotation of the movable base plate 5, due to the contact between the lower protrusions 15 and the upper protrusions 16, the movable base plate 5 will move upward, thereby causing the movable base plate 5 to move up and down repeatedly, applying vibration kinetic energy to the concrete sample mold 6 on the upper side of the movable base plate 5.
[0023] The concrete sample mold 6 is slidably connected to the upper side of the vibrating rotating base. The vibrating rotating base can apply rotational kinetic energy and vibrational kinetic energy to the concrete sample mold 6, causing the concrete sample mold 6 to rotate and vibrate. Under the action of centrifugal force, the concrete sample mold 6 can slide during rotation. The impact force of the repeated movement of the concrete sample mold 6 makes the concrete inside the concrete sample mold 6 vibrate more compactly, allowing air bubbles inside the concrete to be discharged, reducing voids, reducing capillary pores formed by bleeding, reducing porosity, reducing surface pitting or sand marks, and improving the surface smoothness of the sample.
[0024] Specifically, the concrete sample mold 6 can be linearly slidably connected to the upper side of the movable base plate 5, that is, a straight groove is opened on the upper side of the movable base plate 5, and the concrete sample mold 6 is slidably connected to the straight groove.
[0025] like Figures 1-3As shown, the concrete sample mold 6 can also slide more complexly on the upper side of the movable base plate 5. That is, a wave-shaped or zigzag guide groove 7 is provided on the upper side of the movable base plate 5. Two round rods 8 are fixedly connected to the lower side of the concrete sample mold 6. Both round rods 8 are slidably connected inside the guide groove 7. At this time, the round rods 8 are guided by the guide groove 7, which allows the concrete sample mold 6 to swing left and right during the sliding process along the axis of the movable base plate 5, further enhancing the vibration of the concrete.
[0026] like Figures 1-2 and Figure 4 As shown, the reset mechanism is connected to the concrete sample mold 6 via a transmission, and is used to reset the concrete sample mold 6, which has slid to the end of the movable base plate 5 under the action of centrifugal force.
[0027] Specifically, the reset mechanism includes a fixed triangular block 10 and a movable triangular block 9. The movable triangular block 9 is fixedly connected to the outside of the concrete sample mold 6, and the fixed triangular block 10 is fixedly connected to the fixed base plate 1. During the rotation of the movable base plate 5, if the movable triangular block 9 and the fixed triangular block 10 come into contact, the concrete sample mold 6 will be reset under the thrust between the movable triangular block 9 and the fixed triangular block 10.
[0028] Meanwhile, a slider 11 can be fixedly connected to the outside of the concrete sample mold 6. A sliding rod 12 is slidably connected inside the slider 11. Fixed plates 13 are fixedly connected to both ends of the sliding rod 12. The fixed plates 13 and the movable base plate 5 are fixedly connected. A return spring 14 is sleeved on the outside of the sliding rod 12 between the slider 11 and the fixed plate 13. During the sliding process of the concrete sample mold 6, a pushing force is applied to the return spring 14, causing the return spring 14 to compress and shorten. The use of the return spring 14 can reduce the impact force of the concrete sample mold 6 on the movable base plate 5 and further guide the sliding of the concrete sample mold 6.
[0029] A washer 17 located between the slider 11 and the return spring 14 can also be fitted onto the outside of the slide bar 12. The washer 17 can reduce the phenomenon of the return spring 14 extending into the slider 11.
[0030] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.
Claims
1. A low porosity high surface finish concrete sample preparation apparatus, characterised in that: The device includes a vibrating rotating chassis, on which a concrete sample mold (6) and a reset mechanism are installed. The concrete sample mold (6) is slidably connected to the upper side of the vibrating rotating chassis. The vibrating rotating chassis can drive the concrete sample mold (6) to rotate and vibrate. The concrete sample mold (6) can slide on the vibrating rotating chassis during rotation. The reset mechanism is connected to the concrete sample mold (6) and is used to drive the sliding concrete sample mold (6) to reset.
2. The concrete sample preparation device with low porosity and high surface smoothness according to claim 1, characterized in that: The vibrating rotating chassis includes a fixed base plate (1), a servo motor (2) is fixedly connected to the lower side of the fixed base plate (1), an inner shaft (3) located on the upper side of the fixed base plate (1) is fixedly connected to the output end of the servo motor (2), an outer sliding sleeve (4) is vertically slidably connected to the outer side of the inner shaft (3), a movable base plate (5) is fixedly connected to the upper side of the outer sliding sleeve (4), a concrete sample mold (6) is slidably connected to the upper side of the movable base plate (5), a plurality of lower protrusions (15) arranged in a ring array are fixedly connected to the upper side of the fixed base plate (1), and an upper protrusion (16) opposite to the lower protrusions (15) is fixedly connected to the lower side of the movable base plate (5).
3. The concrete sample preparation device with low porosity and high surface smoothness according to claim 2, characterized in that: The upper side of the movable base plate (5) is provided with a wave-shaped or zigzag guide groove (7), and the lower side of the concrete sample mold (6) is fixedly connected with two round rods (8), both of which are slidably connected inside the guide groove (7).
4. The concrete sample preparation device with low porosity and high surface smoothness according to claim 2, characterized in that: The reset mechanism includes a fixed triangular block (10) and a movable triangular block (9). The movable triangular block (9) is fixedly connected to the outside of the concrete sample mold (6), and the fixed triangular block (10) is fixedly connected to the fixed base plate (1).
5. The concrete sample preparation device with low porosity and high surface smoothness according to claim 4, characterized in that: A slider (11) is fixedly connected to the outside of the concrete sample mold (6). A slide rod (12) is slidably connected inside the slider (11). A fixing plate (13) is fixedly connected to both ends of the slide rod (12). The fixing plate (13) is fixedly connected to the movable base plate (5). A return spring (14) is sleeved on the outside of the slide rod (12) between the slider (11) and the fixing plate (13).
6. The concrete sample preparation device with low porosity and high surface smoothness according to claim 5, characterized in that: The outer side of the slide bar (12) is fitted with a washer (17) located between the slider (11) and the return spring (14).