Simple coarse and fine aggregate screening device

Abstract

The utility model provides a simple coarse and fine aggregate screening device, which belongs to the field of construction auxiliary devices, and comprises a screen frame and a screen arranged on the screen frame, gradient control devices are respectively arranged at four corners of the bottom surface of the screen frame, the gradient control devices are connected with an adjustable support playing a role in supporting the screen frame, and the adjustable support is connected with the screen frame. A damping buffer device is arranged between the adjustable support and the screen frame, a vibrator is arranged in the center of the bottom of the screen frame, a protective shell can be arranged outside the vibrator, baffles are welded to the two sides of the screen frame, and a plurality of hanging rings are welded to the tops of the baffles. The vibrating screen is small in weight, convenient to disassemble and transfer, high in screening efficiency, convenient to replace, suitable for screening materials of various particle sizes, capable of being used in cooperation with various feeding devices and capable of controlling the falling and separating speed of aggregate according to the gradient, the damping and buffering device can effectively reduce damage of stone to the vibrating screen during feeding, and the vibrating screen is suitable for screening materials of various particle sizes. And the damping and pressure buffering effects are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of construction auxiliary devices, and particularly relates to a simple coarse and fine aggregate screening device. Background Art

[0002] Sand and gravel play various roles in large-scale infrastructure projects. From providing stable base materials to supporting the construction of complex structures and facilities, they all play an indispensable role. Their quality and selection have important impacts on the quality, durability, and cost-effectiveness of projects. In road construction, it is used to screen road base materials such as sand and stones to ensure the uniformity and suitable particle size distribution of the materials; in bridge and tunnel construction, for concrete and supporting materials such as sand and gravel, coarse and fine screening is carried out to meet the structural design requirements; in construction projects, during the manufacturing process of concrete products, such as the production of precast slabs or concrete blocks, appropriate aggregates and sand materials are required.

[0003] At the construction site of large-scale infrastructure projects, the screening of coarse and fine materials refers to the process of screening and grading raw materials or materials to ensure that they meet the project requirements and standards. This process usually involves separating particles or fragments of different particle sizes from the raw materials for use in the project. CN220991237U provides a concrete coarse and fine aggregate screening device, including a box body, a primary screen mesh, a secondary screen mesh, and a guiding plate. The lower ends of the secondary screen mesh and the guiding plate are respectively hinged to the inner wall of the box body through hinge supports. Through slots are respectively opened at positions of the box body close to the upper parts of the secondary screen mesh and the guiding plate. The upper ends of the secondary screen mesh and the guiding plate respectively pass through the through slots and extend out of the box body. Support plates are respectively arranged below the upper parts of the secondary screen mesh and the guiding plate in the box body. A plurality of springs are fixedly connected to the upper ends of the support plates. The secondary screen mesh and the guiding plate are connected to a driving mechanism to control their upward swing.

[0004] However, currently, the screening equipment used in some large stone quarries is large in size, complex in structure, expensive in cost, and extremely inconvenient for mobile loading and transportation; in the screening of coarse and fine materials at the construction sites of some large-scale infrastructure projects, traditional wooden mesh screens are used, and the screening efficiency is extremely low and the effect is not good. Content of the Utility Model

[0005] The utility model aims at the technical problems existing in the prior art, and provides a simple coarse and fine aggregate screening device, which is small in weight, convenient for disassembly and transfer, high in screening efficiency, convenient for screen replacement, applicable to the screening of materials with various particle sizes, and can be used in cooperation with various feeding devices.

[0006] The utility model adopts the following technical solutions to solve the above problems:

[0007] A simple coarse and fine aggregate screening device, including a screen frame and a screen provided on the screen frame. At the four corners of the bottom surface of the screen frame, slope control devices are respectively provided. The slope control devices are connected with adjustable supports that support the screen frame, and a shock absorption and buffering device is provided between the adjustable supports and the slope control devices.

[0008] Furthermore, the shock absorption and buffering device includes multiple groups of spring components, and connectors are provided at both ends of the spring components.

[0009] Furthermore, a plurality of connection holes are provided on the surface of the slope control device, and the shock absorption and buffering device is inserted into the connection holes through a connecting rod.

[0010] Furthermore, a vibrator is provided at the center position of the bottom of the screen frame, and a protective shell can be provided outside the vibrator.

[0011] Furthermore, baffles are welded on both sides of the screen frame, and a plurality of hanging rings are welded on the top of the baffles.

[0012] Furthermore, the screen adopts a double-layer structure, including a first screen and a second screen, and the first screen and the second screen are connected through a connection mechanism.

[0013] Furthermore, the connection mechanism includes a first frame and a second frame. The first frame is slidably connected to the second frame. The first frame is provided on both sides of the first screen, and the second frame is provided on both sides of the second screen.

[0014] Furthermore, the first frame includes two parallel fixed bars and a fixed member provided at the center of the first frame. The second frame includes fixed slots that cooperate with the fixed bars. A sliding slot is provided at the center of the second frame. A sliding rod and a sliding block that slides along the sliding rod are provided inside the sliding slot, and the sliding block is connected to the fixed member.

[0015] Furthermore, fixing holes are provided on the surface of the sliding block, and the protruding column at the bottom of the fixed member can be inserted into the fixing holes and abutted against the sliding rod.

[0016] Furthermore, the second frame is also provided with installation slots, and both ends of the screen frame are installed in the installation slots.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. The device overcomes the shortcomings of the existing screening devices, is relatively light in weight, convenient to disassemble and transfer, has a relatively high screening efficiency, and is convenient to replace the screen. It is suitable for screening materials of various particle sizes and can be used in conjunction with a variety of feeding equipment.

[0019] 2. The telescopic legs of the device can be adjusted according to the height of the feeding equipment and can be configured for use with a variety of equipment;

[0020] 3. The device is provided with a slope control device on the bottom plate of the screen frame, which can control the falling and separating speed of the aggregate according to the slope size, playing a role in controlling the quality of the screened aggregate at any time;

[0021] 4. The device is provided with a shock absorption and buffering device, which can effectively reduce the damage of the stone material to the device during feeding, playing a role in shock absorption and pressure relief;

[0022] 5. The device is provided with a vibrator in the lower middle part of the screen frame, effectively solving the problem of the decrease in the falling speed caused by the damp accumulation of the aggregate or the blockage of the screen by oversize materials, and improving the screening efficiency;

[0023] 6. The device is provided with baffles on both sides of the screen frame, effectively solving the problem of the mixing of the finished product material and the unscreened material caused by the sliding of the piled-up feeding, and the quality of the screened aggregate is relatively high;

[0024] 7. The screen and the screen frame are connected by bolts, which is convenient and fast to replace the screen. Two screens can also be connected through the first frame and the second frame. The position of the screen can be adjusted by sliding between the two screens, so as to change the mesh size of the screen, which is applicable to various aggregate screening operations;

[0025] 8. The device is provided with a lifting ring at the top, which is convenient and fast to disassemble and transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic structural diagram of the present invention;

[0028] Figure 2 is a schematic structural diagram of another angle of the present invention;

[0029] Figure 3 is a schematic structural diagram of the screen structure in Embodiment 2;

[0030] Figure 4 is a schematic cross-sectional structural diagram in the A-A direction;

[0031] Figure 5 is a schematic structural diagram of the second frame.

[0032] In the figure, 1 is an adjustable support; 2 is a shock absorption and buffering device; 3 is a slope control device; 4 is a screen frame; 5 is a screen; 6 is a baffle; 7 is a vibrator; 8 is a lifting ring; 401 is a first frame; 4011 is a fixing bar; 4012 is a fixing member; 402 is a second frame; 4021 is a fixing groove; 4022 is a sliding groove; 4023 is a sliding rod; 4024 is a sliding block; 4025 is a fixing hole; 4026 is a mounting groove; 501 is a first screen; 502 is a second screen. Detailed implementation manners

[0033] In the description of the present utility model, unless otherwise specified, the orientation or state relationship indicated by terms such as "upper", "lower", "top", "bottom", "longitudinal", etc. is the orientation or state relationship based on the orientation or state relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the structures or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication or connection inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] Embodiment 1

[0036] As Figure 1 、 Figure 2 shown, the present utility model provides a simple coarse and fine aggregate screening device, which includes a screen frame 4 and a screen 5 provided on the screen frame 4. Screen connection bolts are arranged at the four corner positions on the upper surface of the screen frame 4, and the screen 5 is fixed to the surface of the screen frame 4 through the screen connection bolts, which is convenient for installation and replacement; slope control devices 3 are respectively arranged at the four corners of the bottom surface of the screen frame 4, and the slope control devices 3 are connected with an adjustable support 1 that supports the screen frame 4. The adjustable support 1 includes a plurality of telescopic legs, and the telescopic legs are made of square steel pipes and play a role of supporting and bearing force at the bottom of the device. In this embodiment, the telescopic legs are fixed by a positioning hole and positioning pin structure, and the telescopic legs can be extended and retracted by adjusting different positioning holes, and the device can be configured for multiple uses.

[0037] A shock-absorbing and buffering device 2 is provided between the adjustable support 1 and the slope control device 3. The shock-absorbing and buffering device 2 includes multiple groups of spring assemblies. Connectors are provided at both ends of the spring assemblies, which can effectively reduce the damage of stones to the device during feeding and play a role in shock absorption and pressure relief. Multiple connection holes are provided on the surface of the slope control device 3. One of the connectors of the shock-absorbing and buffering device 2 is inserted into the connection hole of the slope control device 3 through a connecting rod. By inserting different connection holes, the inclination angle of the screen frame 4 can be adjusted, and the falling and separating speed of the aggregate can be controlled according to the slope size, playing a role in controlling the quality of the screened aggregate at any time, with convenient operation and stable connection. A vibrator 7 is provided at the center of the bottom of the screen frame 4. A protective shell can be provided outside the vibrator 7, effectively solving the problem of the decrease in the falling speed caused by the accumulation of wet aggregates or the blockage of the screen by oversize materials. The protective shell can protect the vibrator 7 from being smashed and prevent dust from entering, improving the screening efficiency. Baffles 6 are welded on both sides of the screen frame 4, effectively solving the problem of the mixing of finished materials and unscreened materials caused by the accumulation and sliding during feeding, and the quality of the aggregate after screening is relatively high. Multiple lifting rings 8 are welded on the top of the baffle 6, making the disassembly and transfer convenient and fast.

[0038] Before screening materials, place the device on a flat ground, adjust the height of the telescopic legs of the adjustable support 1 according to the height of the feeding equipment, and then fix it after adjusting the appropriate slope through the slope control device 3 according to the particle size of the screened aggregate. Turn on the vibrator 7 to assist the screening operation during the feeding and screening operation. The large materials that do not pass through the screen 5 fall in front of the device, and the small materials that pass through the screen 5 fall below the device, quickly and conveniently completing the screening work of coarse and fine aggregates, effectively solving the problem that it is not convenient to separately transfer and store the coarse and fine aggregates after screening.

[0039] Embodiment 2

[0040] As Figures 3 - 5 shown, the screen 5 adopts a double-layer structure, including a first screen 501 and a second screen 502. The first screen 501 and the second screen 502 are connected through a connecting mechanism, and other technical features are the same as those in Embodiment 1.

[0041] The connecting mechanism includes a first frame 401 and a second frame 402. The first frame 401 is slidably connected to the second frame 402. The first frame 401 is provided on both sides of the first screen 501, and the second frame 402 is provided on both sides of the second screen 502. The second frame 402 is also provided with an installation groove 4026, and both ends of the screen frame 4 are installed in the installation groove 4026.

[0042] The first frame 401 includes two fixed bars 4011 arranged in parallel. The second frame 402 includes fixed slots 4021 that cooperate with the fixed bars 4011. The first frame 401 and the second frame 402 are connected by the fixed bars 4011 and the fixed slots 4021. A fixed member 4012 is provided at the center of the first frame 401. The fixed member 4012 penetrates through the first frame 401. The fixed member 4012 on the side away from the second frame 402 functions as a handle, and can separate the first frame 401 from the second frame 402.

[0043] A sliding slot 4022 is provided at the center of the second frame 402. Inside the sliding slot 4022, there is a sliding rod 4023 and a sliding block 4024 that slides along the sliding rod. The sliding block 4024 is connected to the convex post of the fixed member 4012 on the side close to the second frame 402. The fixed member 4012 can drive the sliding block 4024 to slide along the sliding rod 4023, thereby adjusting the relative position of the first screen 501 and the second screen 502, so that the screen holes on the surfaces of the two screens are staggered to obtain a smaller hole pitch for finer screening. Compared with replacing the screen, the working efficiency is higher and labor is saved.

[0044] The surface of the sliding block 4024 is provided with a fixing hole 4025. The bottom convex post of the fixed member 4012 can be inserted into the fixing hole 4025 and abuts against the sliding rod 4023. When the fixed member 4012 abuts against the sliding rod 4023, the sliding block 4024 cannot move, and the positions of the first frame 401 and the second frame 402 are relatively fixed. Furthermore, the first screen 501 and the second screen 502 are relatively fixed, and stable screen holes can be formed, increasing the stability of the screening work and improving the screening accuracy.

[0045] Before screening the material, place the device on a flat ground, adjust the height of the telescopic legs of the adjustable support 1 according to the height of the feeding equipment, and then fix it after adjusting the appropriate slope through the slope control device 3 according to the particle size of the screening aggregate; slightly pull out the fixed member 4012 so that it disengages from the sliding rod 4023 but does not disengage from the fixing hole 4025, drive the sliding block 4024 to slide to adjust the positions of the first screen 501 and the second screen 502, determine the appropriate screen hole size, push the fixed member 4012 until it abuts against the sliding rod 4023, and after fixing the position of the sliding block 4024, carry out the screening work; turn on the vibrator 7 to assist the screening work during the feeding and screening operation. The large materials that do not pass through the screen 5 fall in front of the device, and the small materials that pass through the screen 5 fall under the device, quickly and conveniently completing the screening work of coarse and fine aggregates, effectively solving the problem that it is not convenient to separately transfer and store the coarse and fine aggregates after screening.

[0046] The above has described the present utility model in detail through embodiments, but the content is only the preferred embodiment of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of application of the present utility model shall still fall within the scope covered by the patent of the present utility model.

Claims

1. A simple screening device for coarse and fine aggregates, characterized in that: It includes a screen frame (4) and a screen (5) provided on the screen frame (4). At the four corners of the bottom surface of the screen frame (4), slope control devices (3) are respectively provided. The slope control devices (3) are connected to adjustable supports (1) that support the screen frame (4), and a shock absorption and buffering device (2) is provided between the adjustable supports (1) and the slope control devices (3).

2. The simple coarse and fine aggregate screening device according to claim 1, characterized in that: The shock absorption and buffering device (2) includes multiple groups of spring components, and connectors are provided at both ends of the spring components.

3. A simple coarse and fine aggregate screening device according to claim 1, characterized in that: Multiple connection holes are provided on the surface of the slope control device (3), and the shock absorption and buffering device (2) is inserted into the connection holes through connecting rods.

4. A simple coarse and fine aggregate screening device according to claim 1, characterized in that: A vibrator (7) is provided at the center of the bottom of the screen frame (4), and a protective shell can be provided outside the vibrator (7).

5. A simple coarse and fine aggregate screening device according to any one of claims 1-4, characterized in that: Baffles (6) are welded on both sides of the screen frame (4), and multiple hanging rings (8) are welded on the top of the baffles (6).

6. The simple coarse and fine aggregate screening device according to claim 1, characterized in that: The screen (5) adopts a double-layer structure, including a first screen (501) and a second screen (502), and the first screen (501) and the second screen (502) are connected through a connection mechanism.

7. A simple coarse and fine aggregate screening device according to claim 6, characterized in that: The connection mechanism includes a first frame (401) and a second frame (402). The first frame (401) is slidably connected to the second frame (402). The first frame (401) is provided on both sides of the first screen (501), and the second frame (402) is provided on both sides of the second screen (502).

8. The simple coarse and fine aggregate screening device according to claim 7, characterized in that: The first frame (401) includes two parallel fixed bars (4011) and a fixed member (4012) provided at the center of the first frame (401). The second frame (402) includes fixed grooves (4021) that cooperate with the fixed bars (4011). A sliding groove (4022) is provided at the center of the second frame (402). A sliding rod (4023) and a sliding block (4024) that slides along the sliding rod are provided inside the sliding groove (4022), and the sliding block (4024) is connected to the fixed member (4012).

9. The simple coarse and fine aggregate screening device according to claim 8, characterized in that: Fixing holes (4025) are provided on the surface of the sliding block (4024), and the protruding column at the bottom of the fixed member (4012) can be inserted into the fixing holes (4025) and abutted against the sliding rod (4023).

10. A simple coarse and fine aggregate screening device according to claim 7, characterized in that: The second frame (402) is further provided with installation grooves (4026), and both ends of the screen frame (4) are installed in the installation grooves (4026).

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