Aggregate screening device for concrete

Abstract

The utility model discloses aggregate screening device for concrete belongs to aggregate screening technical field, including frame and several layers of screen cloth, the screen cloth is set gradually from below to above, and screen cloth all are inclined to set, and the mesh size of the screen cloth is greater than the mesh size of the screen cloth of next layer, and the below of screen cloth is equipped with a plurality of chutes, and the chute is equipped with slide rod respectively, and the both ends of slide rod are connected frame respectively, and the screen cloth is driven to produce vibration by motor respectively, and the lower end of each screen cloth is equipped with inclined discharge board, and the inclined discharge board fixed connection frame. Aggregate screening device for concrete of the utility model, the design of multilayer inclined screen cloth and big and small from top to bottom on the aperture, cooperate the height difference and the staggered layout of the mesh part and the material receiving part, realize the multistage accurate screening of aggregate, guarantee the uniformity of particle size distribution, satisfy the demand of high standard engineering.

Description

Technical Field

[0001] This utility model belongs to the field of aggregate screening technology, specifically relating to an aggregate screening device for concrete. Background Technology

[0002] The production of concrete requires a large amount of stone of different particle sizes as aggregate. As an important component of concrete, the particle size distribution and uniformity of aggregate play a crucial role in the strength, workability, and other properties of concrete. Therefore, efficient and precise aggregate screening is a key step in ensuring concrete quality.

[0003] Currently, traditional concrete aggregate screening devices generally suffer from low screening efficiency and insufficient screening accuracy. Some screening equipment uses a single screen, which cannot achieve multi-stage precise screening of aggregates, resulting in uneven aggregate particle size distribution and making it difficult to meet the stringent requirements of different projects for aggregate gradation. Other screening devices, although using multi-layer screens, have unreasonable screen fixing methods, making it easy for materials to clog the mesh during screening, affecting screening efficiency and quality. The screen cleaning process is time-consuming and labor-intensive, impacting production efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a concrete aggregate screening device, including a frame and several layers of screens, the screens are arranged sequentially from bottom to top, all of which are inclined, the mesh diameter of the upper layer of screen is larger than that of the lower layer of screen, several sliding grooves are provided below the screens, and sliding rods are provided in the sliding grooves respectively. The two ends of the sliding rods are respectively connected to the frame, the screens are driven by motors to generate vibration, and each screen has an inclined feeding plate at the lower end, which is fixedly connected to the frame.

[0005] As a preferred embodiment of the above technical solution, the screen is provided with a receiving part and a mesh part, the height of the receiving part is higher than the height of the mesh part, the mesh on the screen is located in the mesh part, and the receiving part of the next screen is located directly below the mesh part of the previous screen.

[0006] As a preferred embodiment of the above technical solution, the slide bar is fixed on the support plate, and the two ends of the support plate are respectively connected to the frame by springs. One end of the spring is fixedly connected to the support plate, and the other end is fixedly connected to the frame.

[0007] As a preferred embodiment of the above technical solution, the motors are respectively fixedly mounted on the frame, and the output shaft of the motor is fixedly connected to an eccentric wheel. The eccentric wheel is located below the center of the corresponding receiving part and is in contact with the receiving part.

[0008] As a preferred embodiment of the above technical solution, a handle is provided on one side of the screen, a limit plate is fixedly connected to one end of the slide rod, and a threaded hole is provided at the other end, with a limit bolt threadedly connected inside the threaded hole.

[0009] As a preferred embodiment of the above technical solution, the lower end of the inclined feeding plate is provided with a receiving hopper.

[0010] As a preferred embodiment of the above technical solution, the cross-section of the groove is T-shaped, and the cross-section of the slide rod is T-shaped.

[0011] The beneficial effects of this utility model are as follows: The concrete aggregate screening device of this utility model features a multi-layer inclined screen with a larger aperture at the top and a smaller aperture at the bottom. Combined with the height difference and staggered layout between the receiving part and the screen part, it achieves multi-stage precise screening of aggregates, ensuring uniform particle size distribution and meeting the requirements of high-standard projects. In the unique vibration structure, the eccentric wheel drive combined with spring damping allows for flexible control of the vibration frequency of each screen level, which improves screening efficiency, reduces equipment wear, and extends service life. The T-shaped chute and slide bar design ensures stable sliding of the screen, facilitates disassembly and cleaning, and avoids screen blockage. The inclined discharge plate and receiving hopper optimize the material transmission path, improve overall production efficiency, and reduce maintenance and operating costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a side view of the present invention;

[0014] Figure 3 This is a schematic diagram of the cross-sectional structure of the slide and the slide rod. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Concrete aggregate screening devices, such as Figure 1 , 2 As shown in Figure 3, the system includes a frame and several layers of screens 1, arranged sequentially from bottom to top. All screens 1 are inclined, with the mesh size 2 of the upper layer of screen 1 being larger than that of the lower layer. Several grooves 3 are located below each screen 1, and sliding rods 4 are installed within each groove 3. The two ends of each sliding rod 4 are connected to the frame. Each screen 1 is driven by a motor to vibrate. An inclined feeding plate 5 is fixedly connected to the frame at the lower end of each screen 1. When excessive blockage of a screen 1 affects screening efficiency, the screen 1 is removed and replaced with a new one. Blocked screens 1 are then cleaned offline.

[0019] As a preferred embodiment of the above technical solution, the screen 1 is provided with a receiving part 6 and a mesh part 7. The height of the receiving part 6 is higher than the height of the mesh part 7. The mesh 2 on the screen 1 is located in the mesh part 7, and the receiving part 6 of the next screen 1 is located directly below the mesh part 7 of the previous screen 1. After the aggregate falls through the hopper or the mesh part 7 of the previous screen 1, it is caught by the corresponding receiving part 6. The receiving part 6 does not have mesh, and the aggregate slides to the mesh part 7 for screening. Finer aggregate falls into the next screen 1 for further screening, while larger aggregate particles fall along the lower end of the screen 1 into the inclined feeding plate 5 and slide down to the designated position under the guidance of the inclined feeding plate 5.

[0020] As a preferred embodiment of the above technical solution, the slide bar 4 is fixed on the support plate 8, and the two ends of the support plate 8 are respectively connected to the frame by springs 9. One end of the spring 9 is fixedly connected to the support plate 8, and the other end is fixedly connected to the frame.

[0021] As a preferred embodiment of the above technical solution, the motors are respectively fixedly mounted on the frame, and the output shaft 11 of the motor is fixedly connected to an eccentric wheel 10. The eccentric wheel 10 is located below the middle of the corresponding receiving part 6 and is in contact with the receiving part 6.

[0022] As a preferred embodiment of the above technical solution, a handle 12 is provided on one side of the screen 1, and a limiting plate 13 is fixedly connected to one end of the slide rod 4, while a threaded hole 14 is provided at the other end, with a limiting bolt 15 threadedly connected to the threaded hole 14. When the screen 1 needs to be removed and replaced, the limiting bolt 15 is loosened, and the screen 1 is pulled out using the handle 12. After the screen 1 is installed, the limiting bolt 15 is tightened so that the screen 1 is clamped between the limiting bolt 15 and the limiting plate 13, preventing the screen 1 from sliding.

[0023] As a preferred embodiment of the above technical solution, the lower end of the inclined feeding plate 5 is provided with a receiving hopper 16. The receiving hopper 16 catches the aggregates sliding down from the corresponding inclined feeding plate 5 and transports them to designated silos for storage using a conveyor belt.

[0024] As a preferred embodiment of the above technical solution, both the slide groove 3 and the slide rod 4 have a T-shaped cross-section. This ensures that the slide rod 4 will not detach from the slide groove 3 during continuous vibration, thus guaranteeing the stability of the screen 1.

[0025] It is worth mentioning that the technical features such as motors involved in this utility model patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this utility model patent. This utility model patent will not be further elaborated in detail.

[0026] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experimentation on the basis of the prior art should be within the scope of protection defined by the claims.

Claims

1. A concrete aggregate screening device, characterized in that, The system includes a frame and several layers of screens arranged sequentially from bottom to top. All screens are inclined, with the mesh size of the upper screen being larger than that of the lower screen. Several grooves are located below each screen, and sliding rods are installed within these grooves. The ends of the sliding rods are connected to the frame. Each screen is driven by a motor to vibrate. An inclined feeding plate is located at the bottom of each screen and is fixedly connected to the frame. Each screen has a receiving section and a mesh section, with the receiving section higher than the mesh section. The mesh openings on the screen are located within the mesh section, and the receiving section of the next screen is directly below the mesh section of the previous screen.

2. The concrete aggregate screening device as described in claim 1, characterized in that, The slide bar is fixed to the support plate, and the two ends of the support plate are connected to the frame by springs. One end of the spring is fixedly connected to the support plate, and the other end is fixedly connected to the frame.

3. The concrete aggregate screening device as described in claim 2, characterized in that, The motors are fixedly mounted on the frame, and the output shaft of the motor is fixedly connected to an eccentric wheel. The eccentric wheel is located below the center of the corresponding receiving part and is in contact with the receiving part.

4. The concrete aggregate screening device as described in claim 1, characterized in that, A handle is provided on one side of the screen, a limit plate is fixedly connected to one end of the slide rod, and a threaded hole is provided at the other end, with a limit bolt connected to the threaded hole.

5. The concrete aggregate screening device as described in claim 1, characterized in that, The lower end of the inclined feeding plate is provided with a receiving hopper.

6. The concrete aggregate screening device as described in claim 1, characterized in that, The cross-section of the groove is T-shaped, and the cross-section of the slide rod is T-shaped.

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