Gravel material grading screening device for concrete preparation
By designing a multi-stage screening device, a rotary motor drives a gear system to rotate the screening cylinder and screen plate, achieving graded screening of sand and gravel, solving the problem of screen clogging, and improving screening efficiency and concrete preparation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI YAOBAI HENGJI CONCRETE CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-05-01
AI Technical Summary
In the existing concrete preparation process, the sand and gravel screening process is prone to screen clogging, which affects screening efficiency.
A concrete preparation sand and gravel grading and screening device was designed, comprising a screening cylinder, multi-stage screen plates and a drive mechanism. The multi-stage screening components realize the grading and screening of sand and gravel, including primary, secondary and tertiary screening. A rotary motor drives a gear system to rotate the screening cylinder and screen plates, thereby realizing the grading, screening and collection of sand and gravel.
It improves the efficiency of sand and gravel screening, ensures a smooth screening process, avoids screen clogging, and improves the efficiency of concrete preparation.
Smart Images
Figure CN224181386U_ABST
Abstract
Description
A grading and screening device for aggregates used in concrete preparation Technical Field
[0001] This utility model relates to the field of concrete preparation technology, and more specifically to a concrete preparation aggregate grading and screening device. Background Technology
[0002] Concrete refers to artificial stone made by mixing cement, water, sand, gravel, chemical admixtures and mineral admixtures in appropriate proportions, followed by uniform mixing, compaction and curing. Concrete is mainly divided into two stages and states: the plastic state before setting and hardening, i.e., fresh concrete or concrete mixture; and the hard state after hardening, i.e., hardened concrete or concrete.
[0003] The shortcomings of existing technologies: In the current concrete preparation process, sand and gravel often need to undergo multi-stage screening, which can easily lead to a large amount of sand and gravel accumulating on the screen at the same time, causing the screen to be blocked by sand and gravel. As a result, even small sand and gravel particles cannot pass through the screen, thus affecting the efficiency of sand and gravel screening.
[0004] Therefore, there is a need to provide a concrete preparation aggregate grading and screening device to solve the above-mentioned problems. Summary of the Invention
[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a concrete preparation sand and gravel grading and screening device to solve the problems existing in the background art.
[0006] This utility model provides the following technical solution: a concrete preparation sand and gravel grading and screening device, including a sand and gravel screening box, a screening cylinder is movably arranged inside the sand and gravel screening box near the top, four sets of filter holes are evenly opened on the outer wall of the screening cylinder, a controller is fixedly connected to the top of the sand and gravel screening box, a collection box is slidably connected inside the sand and gravel screening box near the bottom, a handle is fixedly connected to the front middle of the collection box, a support plate is fixedly connected to the right side near the middle of the sand and gravel screening box, and a bracket is fixedly connected to the top of the support plate near the right side.
[0007] The concrete preparation aggregate grading and screening device also includes:
[0008] A primary screening assembly is installed on both sides of the support frame and is used to drive the screening cylinder to rotate intermittently to screen the sand and gravel inside the screening cylinder.
[0009] A secondary sieve plate is fixedly installed inside the sand and gravel screening box near the bottom of the screening cylinder for further screening of sand and gravel.
[0010] The third-stage sieve plate is fixedly installed inside the sand and gravel screening box at the bottom end of the second-stage sieve plate, and is used for the final screening of sand and gravel.
[0011] Preferably, the primary screening component includes:
[0012] The rotating plate has four square sliding grooves on its right side. Four arc-shaped blocks are evenly fixedly connected to the outer wall of the rotating plate. Guide columns are slidably connected in the square sliding grooves. A fan-shaped rotating rod is fixedly connected to the right end of the guide column.
[0013] A drive mechanism is located on the right side of the sector-shaped rotating rod and is used to drive the sector-shaped rotating rod to rotate.
[0014] Preferably, the drive mechanism includes a rotary motor, which is fixedly connected to the right side of the bracket via a fixing plate. A main gear is fixedly connected to the transmission end of the rotary motor through the bracket. A secondary gear is meshed with the outer wall of the main gear. The middle part of the secondary gear is fixedly connected to the middle part of the sector-shaped rotating rod via a fixing column. The main gear and the secondary gear are limited and connected by a guide plate.
[0015] Preferably, the four arc-shaped blocks and the four square sliding grooves are staggered, and the fan-shaped end of the fan-shaped rotating rod is in contact with the inner wall of the arc-shaped block.
[0016] Preferably, a first discharge plate is fixedly connected to the right end of the secondary screen plate, and a second discharge plate is fixedly connected to the left end of the tertiary screen plate. Square grooves are provided on both the left and right sides of the sand and gravel screening box. The first discharge plate and the second discharge plate are fixedly connected in the two square grooves. Both the secondary screen plate and the tertiary screen plate are inclined.
[0017] Preferably, a feed pipe is fixedly connected to the left end of the screening cylinder, and the outer wall of the feed pipe is rotatably connected to the sand and gravel screening box through a bearing. A solenoid valve is provided near the left end of the feed pipe.
[0018] The technical effects and advantages of this utility model are as follows:
[0019] 1. This utility model features a primary screening assembly. Concrete-grade sand and gravel enter the screening cylinder through a feed pipe. Supported by a bracket and a support plate, a rotary motor is activated, driving the main gear to rotate. This, in turn, drives the meshing auxiliary gear to rotate under the support of a guide plate. This, in turn, drives a sector-shaped rotating rod to rotate with the auxiliary gear. A square groove at one end of the sector-shaped rotating rod slides within an arc-shaped block, causing the rotating plate to rotate. When the sector end of the rotating rod rotates to fit against the arc-shaped block, the outer wall of the guide column moves out of the square groove and into another square groove, stopping the rotating plate's rotation. When the guide column moves into the other square groove, it further drives the rotating plate to rotate, thus facilitating the rotation and pausing of the screening cylinder. This allows the sand and gravel in the screening cylinder to be screened through the slots, performing preliminary screening of the concrete-grade sand and gravel.
[0020] 2. This utility model features a two-stage and a three-stage sieve. The sand and gravel sieved by the rotating sieve cylinder fall onto the two-stage sieve. Under the influence of gravity, larger sand and gravel particles slide down the two-stage sieve to the first discharge plate for collection. Smaller sand and gravel particles fall onto the three-stage sieve for further sieving. Relatively larger sand and gravel are collected by the second discharge plate. This facilitates the collection of qualified sand and gravel into a collection box. By moving the handle, the collection box can be removed to collect the sand and gravel for concrete preparation, thus improving the efficiency of sand and gravel sieving. Attached Figure Description
[0021] Figure 1 is a schematic diagram of the overall structure of this utility model.
[0022] Figure 2 is a cross-sectional view of the overall structure of this utility model.
[0023] Figure 3 is a schematic diagram of the structure of the primary screening component of this utility model.
[0024] Figure 4 is a schematic diagram of the structure of the secondary and tertiary sieve plates of this utility model.
[0025] The attached diagram is labeled as follows: 1. Controller; 2. Sand and gravel screening box; 3. Primary screening component; 301. Rotating plate; 302. Arc block; 303. Square chute; 304. Guide column; 305. Fan-shaped rotating rod; 306. Secondary gear; 307. Guide plate; 308. Rotary motor; 309. Main gear; 4. Support; 5. Screening cylinder; 6. Support plate; 7. Secondary discharge plate; 8. Collection box; 9. First discharge plate; 10. Handle; 11. Solenoid valve; 12. Feed pipe; 13. Tertiary screen plate; 14. Secondary screen plate. Detailed Implementation
[0026] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The concrete preparation sand and gravel grading and screening device involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0027] Specific Implementation Example 1
[0028] Please refer to Figures 1-3. This utility model is a concrete preparation aggregate grading and screening device, including an aggregate screening box 2. A screening cylinder 5 is movably installed inside the aggregate screening box 2 near the top. Four sets of filter holes are evenly distributed on the outer wall of the screening cylinder 5. A controller 1 is fixedly connected to the top of the aggregate screening box 2. A collection box 8 is slidably connected inside the aggregate screening box 2 near the bottom. A handle 10 is fixedly connected to the middle of the front side of the collection box 8. A support plate 6 is fixedly connected to the right side of the aggregate screening box 2 near the middle. A bracket 4 is fixedly connected to the top of the support plate 6 near the right side. The concrete preparation aggregate grading and screening device also includes a primary screening component 3, which is arranged on both sides of the bracket 4 and used to drive the screening cylinder 5 to rotate intermittently for screening the aggregate inside the screening cylinder 5. The primary screening component 3 includes a rotating plate 301, with four square grooves 303 on the right side of the rotating plate 301. Four arc-shaped blocks 302 are evenly fixedly connected to the outer wall of the rotating plate 301. A guide post 304 is slidably connected in the square groove 303. A fan-shaped rotating rod 305 is fixedly connected to the right end of the guide post 304. A drive mechanism is set on the right side of the fan-shaped rotating rod 305 to drive the fan-shaped rotating rod 305 to rotate. The drive mechanism includes a rotary motor 308, which is fixedly connected to the right side of the bracket 4 through a fixing plate. A main gear 309 is fixedly connected to the transmission end of the rotary motor 308 through the bracket 4. A secondary gear 306 is meshed with the outer wall of the main gear 309. The middle part of the secondary gear 306 is fixedly connected to the middle part of the fan-shaped rotating rod 305 through a fixing post. The main gear 309 and the secondary gear 306 are limited and connected by a guide plate 307. The four arc-shaped blocks 302 and the four square grooves 303 are staggered. The fan-shaped end of the fan-shaped rotating rod 305 is in contact with the inner wall of the arc-shaped blocks 302.
[0029] Specifically: With the support of bracket 4 and support plate 6, the rotary motor 308 is turned on, driving the main gear 309 to rotate. Then, with the support of guide plate 307, the auxiliary gear 306 meshing with it rotates, which in turn drives the sector rod 305 to rotate with the auxiliary gear 306. The square groove 303 at one end of the sector rod 305 slides in the arc block 302, driving the rotating plate 301 to rotate. When the sector end of the sector rod 305 rotates to fit with the arc block 302, the outer wall of the guide post 304 moves out of the square groove 303 and then into another square groove 303. The rotating plate 301 stops rotating. When the guide post 304 moves into another square groove 303, it further drives the rotating plate 301 to rotate.
[0030] Specific Implementation Example 2
[0031] Please refer to Figures 1 and 4. Based on the first specific embodiment, it also includes a secondary screen plate 14, which is fixedly installed inside the sand and gravel screening box 2 near the bottom of the screening cylinder 5 for further screening of sand and gravel; a tertiary screen plate 13, which is fixedly installed inside the sand and gravel screening box 2 near the bottom of the secondary screen plate 14 for final screening of sand and gravel. The right end of the secondary screen plate 14 is fixedly connected to a first discharge plate 9, and the left end of the tertiary screen plate 13 is fixedly connected to a second discharge plate 7. Square grooves are opened on both the left and right sides of the sand and gravel screening box 2. The first discharge plate 9 and the second discharge plate 7 are fixedly connected in the two square grooves. The secondary screen plate 14 and the tertiary screen plate 13 are both inclined. The left end of the screening cylinder 5 is fixedly connected to a feed pipe 12. The outer wall of the feed pipe 12 is rotatably connected to the sand and gravel screening box 2 through a bearing. A solenoid valve 11 is installed near the left end of the feed pipe 12.
[0032] Specifically: the sand and gravel screened by the rotating screening cylinder 5 falls onto the secondary screen plate 14. Under the action of gravity, the larger sand and gravel particles slide down through the secondary screen plate 14 to the first discharge plate 9 for collection. The smaller sand and gravel particles fall onto the tertiary screen plate 13 for further screening. The relatively larger sand and gravel particles are collected through the second discharge plate 7, which is conducive to collecting the qualified sand and gravel after screening into the collection box 8.
[0033] The working principle of this utility model is as follows: The aggregate for concrete preparation enters the screening cylinder 5 through the feed pipe 12. Supported by the bracket 4 and the support plate 6, the rotary motor 308 is turned on, driving the main gear 309 to rotate. This, in turn, drives the meshing auxiliary gear 306 to rotate under the support of the guide plate 307. This, in turn, drives the sector-shaped rotating rod 305 to rotate with the auxiliary gear 306. The square groove 303 at one end of the sector-shaped rotating rod 305 slides within the arc-shaped block 302, causing the rotating plate 301 to rotate. When the sector-shaped end of the sector-shaped rotating rod 305 rotates to fit against the arc-shaped block 302, the outer wall of the guide column 304 moves out of the square groove 303 and into another square groove 303. The rotating plate 301 then stops rotating. When the 04 is moved into another square chute 303, it further drives the rotating plate 301 to rotate, which in turn drives the screening cylinder 5 to rotate and then stop. The sand and gravel in the screening cylinder 5 are screened out through the holes and grooves of the screening cylinder 5, and the sand and gravel used for concrete preparation are initially screened. The sand and gravel screened out by the rotation of the screening cylinder 5 falls onto the secondary screen plate 14. Under the action of gravity, the larger sand and gravel particles slide down through the secondary screen plate 14 to the first discharge plate 9 for collection. The smaller sand and gravel particles fall onto the tertiary screen plate 13 for further screening. The relatively larger sand and gravel are collected through the second discharge plate 7. The qualified sand and gravel after screening is collected in the collection box 8. Move the handle 10 to move the collection box 8 out, and the sand and gravel can be collected.
[0034] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.
[0035] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0036] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A concrete preparation aggregate grading and screening device, comprising an aggregate screening box (2), characterized in that: The sand and gravel screening box (2) has a screening cylinder (5) movably installed near the top inside. The outer wall of the screening cylinder (5) is evenly provided with four sets of filter holes. The top of the sand and gravel screening box (2) is fixedly connected to a controller (1). The inside of the sand and gravel screening box (2) is slidably connected to a collection box (8) near the bottom. The front middle of the collection box (8) is fixedly connected to a handle (10). The right side of the sand and gravel screening box (2) is fixedly connected to a support plate (6) near the middle. The top of the support plate (6) is fixedly connected to a bracket (4) near the right side. The sand and gravel grading and screening device further includes: a primary screening component (3), which is set on both sides of the support (4) to drive the screening cylinder (5) to rotate intermittently and screen the sand and gravel in the screening cylinder (5); a secondary screening plate (14), which is fixedly set inside the sand and gravel screening box (2) near the bottom of the screening cylinder (5) and is used to further screen the sand and gravel; and a tertiary screening plate (13), which is fixedly set inside the sand and gravel screening box (2) at the bottom of the secondary screening plate (14) and is used to finally screen the sand and gravel.
2. The concrete preparation aggregate grading and screening device according to claim 1, characterized in that: The primary screening component (3) includes: a rotating plate (301), with four square grooves (303) on the right side of the rotating plate (301), four arc-shaped blocks (302) uniformly fixedly connected to the outer wall of the rotating plate (301), a guide column (304) slidably connected in the square groove (303), and a fan-shaped rotating rod (305) fixedly connected to the right end of the guide column (304); and a driving mechanism, which is located on the right side of the fan-shaped rotating rod (305) and is used to drive the fan-shaped rotating rod (305) to rotate.
3. The concrete preparation aggregate grading and screening device according to claim 2, characterized in that: The driving mechanism includes a rotary motor (308), which is fixedly connected to the right side of the bracket (4) by a fixing plate. The transmission end of the rotary motor (308) passes through the bracket (4) and is fixedly connected to a main gear (309). The outer wall of the main gear (309) is meshed with a secondary gear (306). The middle part of the secondary gear (306) is fixedly connected to the middle part of the sector-shaped rotating rod (305) by a fixing column. The main gear (309) and the secondary gear (306) are limited and connected by a guide plate (307).
4. The concrete preparation aggregate grading and screening device according to claim 2, characterized in that: The four arc-shaped blocks (302) and the four square sliding grooves (303) are staggered, and the fan-shaped end of the fan-shaped rotating rod (305) is in contact with the inner wall of the arc-shaped block (302).
5. The concrete preparation aggregate grading and screening device according to claim 1, characterized in that: The right end of the secondary screen plate (14) is fixedly connected to the first discharge plate (9), and the left end of the tertiary screen plate (13) is fixedly connected to the second discharge plate (7). The sand and gravel screening box (2) has square grooves on both sides. The first discharge plate (9) and the second discharge plate (7) are fixedly connected in the two square grooves. The secondary screen plate (14) and the tertiary screen plate (13) are both inclined.
6. The concrete preparation aggregate grading and screening device according to claim 1, characterized in that: The left end of the screening cylinder (5) is fixedly connected to the feed pipe (12), and the outer wall of the feed pipe (12) is rotatably connected to the sand and gravel screening box (2) through the bearing. A solenoid valve (11) is provided near the left end of the feed pipe (12).