Concrete aggregate screening device
By designing multiple screening devices and drive components, the problem of incomplete screening in the prior art is solved, and efficient screening and quality assurance of concrete aggregates are achieved.
Patent Information
- Application Number
- CN202422368685.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-09-27
AI Technical Summary
Existing concrete aggregate screening machines usually only have a single-stage screening structure, resulting in incomplete screening, affecting concrete production quality and reducing efficiency.
A multiple screening device was designed, including an inclined sieve plate and a drive assembly. The sieve hole diameter of the sieve plate gradually decreases, and the drive assembly cooperates with the sieve plate to make it move up and down repeatedly to achieve multiple screening, and the feed speed is adjusted by the adjustment mechanism.
It achieves thorough screening of concrete aggregates, improves screening efficiency, ensures concrete production quality, and reduces the workload of workers.
Smart Images
Figure CN223312455U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete production, in particular to a concrete aggregate screening device. Background Art
[0002] Concrete, abbreviated as "concrete," is a general term for engineering composite materials in which aggregates are bonded together by a cementitious material. The term "concrete" generally refers to cement as the binder, sand and stone as aggregates, mixed with water (which may contain admixtures and additives) in a specific proportion, and then mixed. This cement concrete, also known as ordinary concrete, is widely used in civil engineering. The article "Analysis of the Screening Test Method for Fine Aggregate for Concrete," published in the 3rd issue of the 2022 issue of the journal "China Harbor Construction," states that aggregate (also known as aggregate) is one of the main components of concrete and serves as the skeleton. Particles with a size of 5 mm or larger are considered coarse aggregate, while particles with a size of 5 mm or less are considered fine aggregate. Coarse aggregate used in ordinary concrete is crushed stone and pebbles, while fine aggregate is sand. Fine aggregate in ordinary concrete accounts for approximately 20%-33% of the total concrete volume. Fine aggregate affects not only the strength of concrete but also its durability and structural properties. In order to properly select, use, and ensure the quality of aggregates for concrete, a small amount of concrete samples are generally taken for mix testing before the actual pouring. This allows for the inspection of various performance parameters of the concrete and further determines whether the resulting concrete is qualified for use in actual construction. During the testing process, different aggregate sizes must be selected based on the strength of the concrete to be prepared. This means that the aggregates must be screened to obtain aggregates of different sizes.
[0003] Typically, screens are commonly used for concrete aggregate screening. Traditional manual screens have largely been eliminated, and vibrating screens or screening machines are now commonly used for aggregate screening. However, existing concrete aggregate screening machines typically only have a single-stage screening structure, and most can only screen out larger aggregates, resulting in incomplete aggregate screening. Incomplete aggregate screening not only affects the quality of concrete production, but may also require secondary screening, thereby reducing the overall efficiency of the device. To address this issue, we propose a concrete aggregate screening device. Summary of the Invention
[0004] In order to solve the problems pointed out in the background technology, the utility model proposes a concrete aggregate screening device, which ensures the effect of screening concrete aggregates, avoids the impact of incomplete concrete aggregate screening on the quality of concrete production, improves the working efficiency of concrete aggregate screening, and reduces the workload of staff.
[0005] In order to achieve the above purpose, the technical solution of the utility model is:
[0006] The cam is provided with a plurality of movable plates, the movable plates being slidably arranged on the inner wall of the cam, the movable plates being a U-shaped plate, the movable plates comprising a horizontal plate and a vertical plate connected at both ends of the horizontal plate, a plurality of sieve plates being arranged in sequence from top to bottom between the two vertical plates, the plurality of sieve plates being inclined on the opposite sides of the two vertical plates, the surfaces of the sieve plates being provided with sieve holes, the sieve holes of the plurality of sieve plates being gradually reduced from top to bottom, the side walls of the sieve box being provided with discharge ports corresponding to the plurality of sieve plates, the discharge ports being provided near the lower end of the sieve plates, and a guide plate being provided at each discharge port; the upper surfaces of the horizontal plates are inclined inwardly, the centers of the horizontal plates are provided with a rectangular hole, and a driving assembly is provided below the horizontal plates;
[0007] A feed hopper is provided on the top of the screening box, and the feed hopper is tilted on the screening box through an adjustment mechanism. A discharge pipe is provided at the bottom of the screening box. The discharge pipe is a conical structure with a larger upper part and a smaller lower part. The top of the discharge pipe is connected to the screening box, and a collection component is provided at the outlet of the bottom of the discharge pipe.
[0008] Preferably, the drive assembly includes a drive shaft, which is rotatably set on the screening box, and two cams are arranged on the drive shaft at intervals; a fixed plate is installed on the inner wall of the screening box, a guide rod is passed through the center of the fixed plate, and a push plate is connected to the bottom of the guide rod, and the cam is in contact with the push plate.
[0009] Preferably, a motor is provided on the frame, and an output shaft of the motor passes through a side wall of the screening box and is connected to the drive shaft.
[0010] Preferably, a spring is mounted on the guide rod, and the spring is located between the push plate and the fixed plate. The guide rod and the push plate are an integrated structure, the guide rod and the spring are arranged in two groups, and the top of the guide rod is fixedly connected to the cross plate.
[0011] Preferably, the adjustment mechanism includes a group of arc-shaped adjustment plates arranged on the side walls of the screening box, and a plurality of positioning holes are opened on the adjustment plates, one of which is passed through a positioning bolt, and a threaded hole matching the positioning bolt is opened on the outer wall of the feed hopper.
[0012] Preferably, a feeding port is provided at the bottom of the feed hopper, a bracket is provided at the top of the screening box, both ends of the bracket are fixedly connected to the inner wall of the screening box, and the bottom edge of the feed hopper near the feeding port is hinged to the bracket through a hinge.
[0013] Preferably, the collecting assembly includes a collecting bucket, and vertical plates are respectively provided on both sides of the collecting bucket. A card slot is opened on both vertical plates, and a convex strip that cooperates with the card slot is provided on the collecting bucket. One end of the outer side of the collecting bucket extends out of the vertical plate and is connected to a limiting plate, and a handle is provided on the outer side of the limiting plate.
[0014] Preferably, universal wheels are provided at the four corners of the bottom of the frame, and support assemblies are provided on the front and rear sides of the middle of the frame. The support assembly includes a mounting plate, a sleeve is provided at the center of the mounting plate, a screw is connected to the inner thread of the sleeve, both ends of the screw extend out of the sleeve, one end of the screw located outside the sleeve is connected to a support block, and a knob is provided at the end of the screw away from the support block.
[0015] The beneficial effects of the utility model are:
[0016] 1. The concrete aggregate screening device provided by the utility model is provided with a screening assembly, and a concrete sample is poured from a feed hopper into the uppermost sieve plate. During the screening process, the concrete sample gradually flows through three sieve plates, and the sieve hole diameters of the three sieve plates gradually decrease from top to bottom. Granular aggregates of different particle sizes are blocked on each inclined sieve plate in order from large to small in diameter, and then slide on the sieve plates to the corresponding discharge ports, and then are discharged from the guide plates in a classified manner. The multiple screening makes the screening more thorough, ensuring the effect of the device on screening concrete aggregates, and solves the problem that the existing concrete aggregate screening machine usually has only a single screening structure, and most of them can only screen out larger aggregates, and the aggregate screening is not thorough enough, and the incomplete concrete aggregate screening affects the quality of concrete production.
[0017] 2. In the utility model, when the concrete sample gradually flows through the three sieve plates, a driving assembly is set up and the motor is started. The motor drives the driving shaft to rotate, and then the driving shaft drives the cam to rotate. When the cam rotates, it contacts the push plate. The push plate is lifted by the cam and then falls down due to the elastic return of the spring. In this way, the sieve plate repeatedly moves up and down, thereby achieving the effect of increasing the screening rate of the sieve plate, thereby improving the working efficiency of concrete aggregate screening. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a three-dimensional concrete aggregate screening device of the utility model. Figure 1 .
[0019] Figure 2 This is a three-dimensional concrete aggregate screening device of the utility model. Figure 2 .
[0020] Figure 3 This is a front sectional view of a concrete aggregate screening device of the present invention, in which the frame, universal wheels and support components are not shown.
[0021] Figure 4 It is a schematic diagram of the interior of a screening box in a concrete aggregate screening device of the present invention.
[0022] Figure 5 This utility model is a concrete aggregate screening device Figure 3 Enlarged schematic diagram of point A in the middle.
[0023] Figure 6 It is a schematic diagram of a movable plate in a concrete aggregate screening device of the present utility model.
[0024] Figure 7 It is a schematic diagram of a driving component in a concrete aggregate screening device of the present utility model.
[0025] Figure 8 It is an exploded view of a feed hopper and an adjusting component in a concrete aggregate screening device of the utility model.
[0026] Figure 9 It is a schematic diagram of a collecting component in a concrete aggregate screening device of the present invention. DETAILED DESCRIPTION
[0027] The present invention is further described below with reference to the accompanying drawings and specific embodiments:
[0028] like Figures 1 to 9 The sieve box 2 is provided with a plurality of sieve holes 5 on the sieve plate 302, and the sieve holes 5 on the sieve plate 302 are connected to each other at two ends of the sieve plate 301.
[0029] Furthermore, a feed hopper 9 is provided on the top of the screening box 2, and the feed hopper 9 is tilted on the screening box 2 through an adjustment mechanism. A discharge pipe 10 is provided at the bottom of the screening box 2. The discharge pipe 10 is a conical structure with a larger upper part and a smaller lower part. The top of the discharge pipe 10 is connected to the screening box 2, and a collection component is provided at the outlet of the bottom of the discharge pipe 10.
[0030] Through the above-mentioned structure, the concrete sample is poured from the feed hopper 9 onto the uppermost sieve plate 4. During the screening process, the concrete sample gradually flows through the three sieve plates 4. The diameters of the sieve holes 5 of the three sieve plates 4 gradually decrease from top to bottom. Granular aggregates of different particle sizes are blocked on each inclined sieve plate 4 in order from large to small in diameter, and then slide on the sieve plate 4 to the corresponding discharge port 6, and then are discharged from the guide plate 7 in a classified manner, realizing multiple screening.
[0031] Please refer again Figure 3 and Figure 7 The driving assembly includes a driving shaft 11, which is rotatably set on the screening box 2, and two cams 12 are arranged on the driving shaft 11 at intervals; a fixed plate 13 is installed on the inner side wall of the screening box 2, and a guide rod 14 is passed through the center of the fixed plate 13. A push plate 15 is connected to the bottom of the guide rod 14, and the cam 12 is in contact with the push plate 15.
[0032] Please refer again Figure 4 , a motor 16 is provided on the frame 1, and an output shaft of the motor 16 passes through the side wall of the screening box 2 and is connected to the drive shaft 11. The motor 16 provides power for the drive assembly.
[0033] Specifically, a spring 17 is mounted on the guide rod 14 and is located between the push plate 15 and the fixed plate 13. The guide rod 14 and the push plate 15 are an integrated structure. The guide rod 14 and the spring 17 are provided in two sets, and the top of the guide rod 14 is fixedly connected to the cross plate 301. Through the above arrangement, by starting the motor 16, the motor 16 drives the drive shaft 11 to rotate, and the drive shaft 11 then drives the cam 12 to rotate. While the cam 12 rotates, it contacts the push plate 15. The push plate 15 is lifted up by the cam 12 and then elastically resets and falls down by the spring 17. In this way, the sieve plate 4 repeatedly moves up and down, thereby improving the screening rate of the sieve plate 4.
[0034] In this embodiment, the adjustment mechanism includes a group of arc-shaped adjustment plates 18 arranged on the side walls of the screening box 2, and a plurality of positioning holes 19 are opened on the adjustment plate 18, one of which is passed through a positioning bolt 20, and a threaded hole 21 matching the positioning bolt 20 is opened on the outer wall of the feed hopper 9.
[0035] Furthermore, in this embodiment, the feed hopper 9 is configured to be in the shape of a dustpan, and a feed port 22 is provided at the bottom of the feed hopper 9. A bracket 23 is provided at the top of the screening box 2. Both ends of the bracket 23 are fixedly connected to the inner wall of the screening box 2. The bottom edge of the feed hopper 9 close to the feed port 22 is hinged to the bracket 23 through a hinge 24.
[0036] By providing an adjustment mechanism, by inserting the positioning bolts 20 into the positioning holes 19 at different positions on the adjustment plate 18 and aligning the positioning holes 19 with the threaded holes 21 on the feed hopper 9, it is convenient for the positioning bolts 20 to pass through the positioning holes 19 and be screwed into the threaded holes 21, thereby adjusting the inclination angle of the feed hopper 9 and adjusting the falling speed of the concrete sample passing through the feeding port 22.
[0037] Please refer again Figure 9 The collecting assembly includes a collecting bucket 25, and vertical plates 26 are respectively provided on both sides of the collecting bucket 25. A card slot 27 is opened on each of the two vertical plates 26. The collecting bucket 25 is provided with a convex strip 28 that cooperates with the card slot 27. One end of the outer side of the collecting bucket 25 extends out of the vertical plate 26 and is connected to a limiting plate 29. A handle 30 is provided on the outer side of the limiting plate 29.
[0038] By pulling the handle 30 outward, the protrusions 28 on both sides of the collecting bucket 25 slide in the card slots 27, so that the collecting bucket 25 can be easily pulled out to clean the materials inside the collecting bucket 25; after cleaning, the collecting bucket 25 can be put back.
[0039] It is worth mentioning that universal wheels 31 are provided at the four corners of the bottom of the frame 1, and support components are provided on the front and rear sides of the middle part of the frame 1. The support components include a mounting plate 32, a sleeve 33 is provided at the center of the mounting plate 32, and a screw 34 is connected to the internal thread of the sleeve 33. Both ends of the screw 34 extend out of the sleeve 33, and the end of the screw 34 located outside the sleeve 33 is connected to a support block 35, and a knob 36 is provided at the end of the screw 34 away from the support block 35.
[0040] Through the above-mentioned setting structure, the overall mobility of the device is enhanced by the universal wheel 31. When in use, the universal wheel 31 can be used to effectively move the device as a whole. Furthermore, through the structural design of the mounting plate 32, the screw 34 and the support block 35, the overall stability of the device is enhanced. After the device is moved to the working position, the support block 35 can be driven to move downward by rotating the screw 34 to effectively support the frame 1.
[0041] How to use this product:
[0042] The concrete aggregate screening device provided by the present invention is provided with a screening assembly, and a concrete sample is poured from a feed hopper 9 onto the uppermost sieve plate 4. During the screening process, the concrete sample gradually flows through the three sieve plates 4, and the diameters of the sieve holes 5 of the three sieve plates 4 gradually decrease from top to bottom. Granular aggregates of different particle sizes are blocked on each inclined sieve plate 4 in order from large to small in diameter, and then slide on the sieve plates 4 to the corresponding discharge ports 6, and then are discharged from the guide plate 7 in a classified manner. After the screening is completed, the material that finally passes through the lowermost sieve plate 4 will pass through the rectangular holes 8 on the horizontal plate 301, and then enter the collection hopper 25 through the discharge pipe 10 for collection.
[0043] As the concrete sample gradually flows through the three sieve plates 4, a drive assembly is provided. After the motor 16 is started, the motor 16 drives the drive shaft 11 to rotate, and the drive shaft 11 then drives the cam 12 to rotate. As the cam 12 rotates, it contacts the push plate 15. The push plate 15 is lifted up by the cam 12 and then elastically resets and falls down by the spring 17. In this way, the sieve plates 4 repeatedly move up and down, thereby achieving the effect of improving the screening rate.
[0044] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.
Claims
1. A concrete aggregate screening device, comprising a frame (1), characterized in that: A screening box (2) is provided on the frame (1), a screening assembly is provided in the screening box (2), and the screening assembly includes a movable plate (3), the movable plate (3) is slidably provided on the inner wall of the screening box (2), the movable plate (3) is a U-shaped plate, the movable plate (3) includes a horizontal plate (301) and vertical plates (302) connected to both ends of the horizontal plate (301), and a plurality of screening plates (4) are sequentially provided between the two vertical plates (302) from top to bottom, and the plurality of screening plates (4) are all tilted and relatively provided on the two vertical plates (302). On the side of the screen plate (4), the surface of each screen plate (4) is provided with screen holes (5), and the diameters of the screen holes (5) of the plurality of screen plates (4) gradually decrease from top to bottom. The side wall of the screening box (2) is provided with discharge ports (6) corresponding to the plurality of screen plates (4), and the discharge ports (6) are arranged close to the lower end of the screen plate (4). A guide plate (7) is provided at each discharge port (6); the upper surface of each transverse plate (301) is inclined inwardly, and a rectangular hole (8) is provided in the center of the transverse plate (301). A driving assembly is provided below the transverse plate (301); A feed hopper (9) is provided on the top of the screening box (2), and the feed hopper (9) is tilted and arranged on the screening box (2) through an adjustment mechanism. A discharge pipe (10) is provided at the bottom of the screening box (2), and the discharge pipe (10) is a conical structure with a larger upper portion and a smaller lower portion. The top of the discharge pipe (10) is connected to the screening box (2), and a collecting assembly is provided at the outlet of the bottom of the discharge pipe (10).
2. The concrete aggregate screening device according to claim 1, characterized in that: The driving assembly includes a driving shaft (11), the driving shaft (11) is rotatably mounted on the screening box (2), and two cams (12) are spaced apart on the driving shaft (11); a fixing plate (13) is mounted on the inner side wall of the screening box (2), a guide rod (14) is passed through the center of the fixing plate (13), a push plate (15) is connected to the bottom of the guide rod (14), and the cams (12) are in contact with the push plate (15).
3. The concrete aggregate screening device according to claim 2, characterized in that: A motor (16) is provided on the frame (1), and an output shaft of the motor (16) passes through a side wall of the screening box (2) and is connected to the drive shaft (11).
4. The concrete aggregate screening device according to claim 2, characterized in that: A spring (17) is mounted on the guide rod (14), and the spring (17) is located between the push plate (15) and the fixed plate (13). The guide rod (14) and the push plate (15) are an integrated structure. The guide rod (14) and the spring (17) are provided in two groups, and the top of the guide rod (14) is fixedly connected to the horizontal plate (301).
5. The concrete aggregate screening device according to claim 1, characterized in that: The adjustment mechanism comprises a group of arc-shaped adjustment plates (18) arranged on the side wall of the screening box (2), a plurality of positioning holes (19) are opened on the adjustment plate (18), a positioning bolt (20) is passed through one of the positioning holes (19), and a threaded hole (21) matching the positioning bolt (20) is opened on the outer wall of the feed hopper (9).
6. The concrete aggregate screening device according to claim 1, characterized in that: The bottom of the feed hopper (9) is provided with a feeding port (22), and the top of the screening box (2) is provided with a bracket (23). Both ends of the bracket (23) are fixedly connected to the inner wall of the screening box (2), and the bottom edge of the feed hopper (9) near the feeding port (22) is hinged to the bracket (23) through a hinge (24).
7. The concrete aggregate screening device according to claim 1, characterized in that: The collecting assembly comprises a collecting bucket (25), both sides of the collecting bucket (25) are provided with vertical plates (26), both vertical plates (26) are provided with a card slot (27), the collecting bucket (25) is provided with a convex strip (28) that matches the card slot (27), one outer end of the collecting bucket (25) extends out of the vertical plate (26) and is connected to a limiting plate (29), and a handle (30) is provided on the outer side of the limiting plate (29).
8. The concrete aggregate screening device according to claim 1, characterized in that: Universal wheels (31) are provided at the four corners of the bottom of the frame (1), and support assemblies are provided on both the front and rear sides of the middle of the frame (1). The support assembly includes a mounting plate (32), a sleeve (33) is provided at the center of the mounting plate (32), a screw rod (34) is connected to the internal thread of the sleeve (33), both ends of the screw rod (34) extend out of the sleeve (33), one end of the screw rod (34) located outside the sleeve (33) is connected to a support block (35), and a knob (36) is provided at one end of the screw rod (34) away from the support block (35).