Multi-stage screening device for commercial concrete production
By designing a multi-stage screening frame and intercepting net, the problem of traditional screening equipment being unable to meet the screening of multiple aggregate specifications is solved, realizing the fine grading and efficient screening of commercial concrete aggregates, preventing screen blockage, and improving production quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG QUNYING CONCRETE CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-05-01
AI Technical Summary
Traditional single-stage screening equipment cannot meet the simultaneous screening needs of multiple aggregate sizes in commercial concrete production, and fine aggregates are prone to clogging the screen holes during the screening process, resulting in poor screening effect.
The multi-stage screening structure, which employs a two-layer screening frame and a bottom intercepting net, combined with the design of a spring frame and an electrically driven rotating rod, achieves multi-stage particle size classification and prevents clogging through the buffering effect of the spring frame and the reciprocating motion of the intercepting net.
It enables precise grading of commercial concrete aggregates, improves screening efficiency and accuracy, reduces equipment maintenance frequency, prevents screen clogging, and ensures smooth production processes.
Smart Images
Figure CN224181350U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of commercial concrete production equipment, specifically a multi-stage screening device for commercial concrete production. Background Technology
[0002] As a core material in construction projects, the quality of ready-mixed concrete directly affects key properties such as structural strength and durability. In the ready-mixed concrete production process, aggregate screening is one of the key steps that determines the quality of the finished product. The particle size distribution, mud content, and impurity content of aggregates must be strictly controlled to meet the mix proportion requirements of different grades of concrete. In traditional ready-mixed concrete production, aggregate screening usually uses a single screen or simple multi-stage screening equipment. However, with the increasing demand for high-performance concrete and green building materials, the requirements for fine aggregate screening are becoming increasingly stringent.
[0003] Traditional single-stage screening equipment can only achieve single-size grading, which cannot meet the needs of simultaneous screening of multiple aggregate sizes in commercial concrete production. Moreover, during the screening process, especially for fine aggregates, dust and fine particles in the aggregates are easy to adhere to the screen mesh, clogging the screen holes, which reduces the effective screening area of the screen mesh and worsens the screening effect. Utility Model Content
[0004] The purpose of this utility model is to provide a multi-stage screening device for commercial concrete production, in order to solve the problem mentioned in the background art that traditional single-stage screening equipment can only achieve single-size grading, which cannot meet the needs of simultaneous screening of multiple aggregates in commercial concrete production. Moreover, during the screening process, especially for the screening of fine aggregates, dust and fine particles in the aggregates are easy to adhere to the screen mesh, block the screen holes, reduce the effective screening area of the screen mesh, and worsen the screening effect.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage screening device for commercial concrete production, including a screening box, which is configured as a rectangular box structure. A closed cover is snapped onto one side of the screening box, and two layers of screening frames are vertically placed inside the screening box. An intercepting net is slidably connected to the bottom of the screening box. The intercepting net and the screening frame form a screening structure for commercial concrete production.
[0006] The side wall of the screening box is symmetrically provided with a positioning cavity, and a positioning frame is engaged in the positioning cavity. The positioning frame passes through the screening frame through a shaft, and a rectangular opening is provided in the screening frame. A spring frame is installed in the rectangular opening of the screening frame, and the top of the spring of the spring frame abuts against the screening screen, and the screening screen slides in the rectangular opening of the screening frame.
[0007] The closed cover has the same number of openings as the screening frame, and one end of the screening frame abuts against the bottom end of the opening of the closed cover. The outer wall of the opening of the closed cover is provided with an inclined guide frame, and a diversion plate is fixed on the inner wall of the closed cover. The diversion plate is above the screening frame, and the screening frame is above the diversion plate. There is an intercepting net below the screening frame.
[0008] By adopting the above technical solution, the two-layer screening mesh and the intercepting mesh of the screening frame are combined to form a multi-stage screening structure, which can classify commercial concrete aggregates according to different particle sizes, meet the strict requirements of different grades of concrete for aggregate particle size, and improve the quality of concrete production.
[0009] Preferably, the screening box and the closed cover form a box structure with an upper opening, and the bottom of the screening box is provided with an opening.
[0010] By adopting the above technical solution, the screening box and the closed cover form an upper opening structure to facilitate the addition of materials to be screened, and the bottom opening of the screening box facilitates the smooth discharge of the screened materials, ensuring a smooth production process.
[0011] Preferably, the first diverter plate is an inclined plate, and both the first diverter plate and the second diverter plate are engaged and connected to the surface of the closed cover.
[0012] Using the above technical solution, the first and second diversion plates are inclined and snapped together on the surface of the closed cover, which can divert the material twice, making the material more evenly dispersed on the screening frame and the intercepting net, thereby improving screening accuracy and efficiency.
[0013] Preferably, the screening frame is inclined, and the inclination direction of the screening frame is staggered with the inclination direction of the diversion plate.
[0014] By adopting the above technical solution, the screening frame is tilted and its tilt direction is staggered with that of the diversion plate, which makes the sliding path of the material on the screening frame longer, increases the contact time with the screen, facilitates the passage of particles through the screen, and improves the screening effect.
[0015] Preferably, the second diverter plate is above the interceptor mesh, and the aperture of the interceptor mesh is smaller than that of the screening mesh.
[0016] Using the above technical solution, the diversion plate 2 further guides the material above the intercepting net. The aperture of the intercepting net is smaller than that of the screening net, which can screen the material after it has been screened by the screening frame again, so as to achieve finer particle size classification and obtain aggregates that meet the requirements.
[0017] Preferably, a sliding plate is fixedly installed at one end of the interception net, and toothed blocks are provided at equal intervals on the side wall of the sliding plate. The toothed blocks of the sliding plate are meshed with the gear of the electric drive rod, and the gear of the electric drive rod is an incomplete gear, with its teeth occupying half of the circumference.
[0018] Using the above technical solution, the incomplete gear of the electric drive rotor meshes with the slide block, driving the intercepting net to reciprocate, which helps to screen the material on the intercepting net, while shaking off particles that may adhere to the surface of the intercepting net, preventing the intercepting net from clogging and improving screening efficiency.
[0019] Preferably, the electric drive rotor is mounted on the outer wall of the screening box via a bracket, and the outer wall of the screening box is provided with a strip cover, and a spring connected to the interception net is installed inside the strip cover of the screening box.
[0020] Using the above technical solution, the electric drive rotor is installed on the outer wall of the screening box, and the spring inside the strip cover is connected to the interception net to assist the interception net in resetting and ensure the stability of the reciprocating motion of the interception net. At the same time, the strip cover can protect the spring and other components from external interference and damage.
[0021] Compared with the prior art, the beneficial effects of this utility model are: This multi-stage screening device for commercial concrete production:
[0022] 1. This screening device forms a three-stage screening structure through two layers of screening frames and a bottom intercepting net. The upper screening net has a larger aperture, the middle layer is next, and the intercepting net has the smallest aperture, which realizes the fine grading of commercial concrete aggregate to meet the production needs of different grades of concrete. The screening frame is inclined and intersects with the diversion plate in the same inclined direction, which prolongs the residence time of the material on the screen surface, so that the material is fully dispersed and in contact with the screen, improving screening efficiency. The screening frame is connected to the positioning cavity through the positioning frame and the closing cover is connected to the screening box, so that screen replacement or equipment maintenance does not require complicated tools.
[0023] 2. The screening mesh is elastically connected to the screening frame via a spring frame. When the material impacts the screen, the spring's buffering effect causes the screen to generate high-frequency micro-vibration, effectively preventing particles from getting stuck in the screen holes and reducing the probability of screen blockage. Meanwhile, the intercepting mesh works in tandem with the spring through the incomplete gear of the electric drive rod to achieve periodic reciprocating vibration, which not only accelerates the passage of fine particles through the screen but also shakes off wet and sticky materials adhering to the screen surface, reducing the frequency of manual cleaning.
[0024] 3. By using the combination of diverter plate one and diverter plate two, the material is evenly dispersed twice before entering the screening area. Diverter plate one guides the material to different positions on the screening frame, and diverter plate two further disperses the material passing through the screening frame, ensuring a more uniform distribution of material on the intercepting net and avoiding uneven screening caused by local overload. The inclined guide frame at the opening of the closed cover effectively prevents the material from accumulating during discharge, allowing the material to enter the screening box at a stable flow rate and reducing equipment vibration and noise caused by feeding impact. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of this utility model;
[0026] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;
[0027] Figure 3 This is a three-dimensional structural diagram of the screening box and screening frame of this utility model.
[0028] Figure 4 This is a schematic diagram of the overall internal side section of the present invention.
[0029] Figure 5 This is a three-dimensional structural diagram of the installation of the closed cover and screening frame of this utility model;
[0030] Figure 6 This is a three-dimensional structural diagram showing the installation positions of the screening frame and spring frame of this utility model.
[0031] In the diagram: 1. Screening box; 2. Closed cover; 3. Guide frame; 4. Diverter plate one; 5. Positioning frame; 6. Screening frame; 7. Screening mesh; 8. Spring frame; 9. Positioning cavity; 10. Diverter plate two; 11. Interception net; 12. Slide plate; 13. Electric drive rotary rod. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Please see Figures 1-6 This utility model provides a technical solution: a multi-stage screening device for commercial concrete production, including a screening box 1, a closing cover 2, a guide frame 3, a first diversion plate 4, a positioning frame 5, a screening frame 6, a screening mesh 7, a spring frame 8, a positioning cavity 9, a second diversion plate 10, an interception mesh 11, a sliding plate 12, and an electric drive rotating rod 13.
[0034] Among them, the screening box 1 is set as a rectangular box structure. A closed cover 2 is snapped to one side of the screening box 1, and two layers of screening racks 6 are vertically placed inside the screening box 1. An interception net 11 is slidably connected to the bottom of the screening box 1. The interception net 11 and the screening rack 6 constitute a screening structure for commercial concrete production.
[0035] The screening box 1 has a symmetrically arranged positioning cavity 9 on its side wall, and a positioning frame 5 is engaged and connected in the positioning cavity 9. The screening box 1 and the closing cover 2 form a box structure with an upper opening, and the bottom of the screening box 1 has an opening. The positioning frame 5 passes through the screening frame 6 through the shaft, and a rectangular opening is opened in the screening frame 6. A spring frame 8 is installed in the rectangular opening of the screening frame 6, and the top of the spring of the spring frame 8 abuts against the screening screen 7. The screening screen 7 slides in the rectangular opening of the screening frame 6. The screening frame 6 is inclined, and the inclination direction of the screening frame 6 is intersected with the inclination direction of the diversion plate 4.
[0036] Referring to the attached diagrams in the instruction manual Figures 1-6 As shown, place the screening box 1 on the foundation and fix it with bolts through the mounting holes. Connect the closed cover 2 to the screening box 1, ensuring a tight connection to prevent material leakage. Since the guide frame 3 is installed on the outer wall of the opening of the closed cover 2, it facilitates the discharge of the separated material. Then, connect the first diversion plate 4 and the second diversion plate 10 to the inner wall of the closed cover 2 to assist material flow. Insert the positioning frame 5 into the positioning cavity 9 on the side wall of the screening box 1, so that the positioning frame 5 passes through the screening frame 6 via the shaft. Secure the positioning frame 5 to the shaft with bolts, thereby fixing the position of the screening frame 6 within the screening box 1. During installation, pay attention to adjusting the tilt angle of the screening frame 6. Install the spring frame 8 inside the rectangular opening of the screening frame 6, and place the screening screen 7 on the top of the spring in the spring frame 8, ensuring that the screening screen 7 can slide flexibly within the rectangular opening. Figure 6 As shown, due to the presence of the spring frame 8, the screening screen 7 can vibrate to a certain extent, which helps to improve screening efficiency and prevent screen blockage. The material screened by the upper screening frame 6 continues to fall onto the lower screening frame 6 for further screening.
[0037] The closed cover 2 has the same number of openings as the screening frame 6, and one end of the screening frame 6 abuts against the bottom end of the opening of the closed cover 2. An inclined guide frame 3 is provided on the outer wall of the opening of the closed cover 2, and a diversion plate 4 is fixed to the inner wall of the closed cover 2. The diversion plate 4 is an inclined plate, and both the diversion plate 4 and the diversion plate 10 are engaged and connected to the surface of the closed cover 2. The diversion plate 10 is above the intercepting net 11, and the aperture of the intercepting net 11 is smaller than the aperture of the screening net 7. The diversion plate 4 is above the screening frame 6, and the screening frame... Above the diversion plate 10 and below the screening frame 6, there is an interception net 11. A slide plate 12 is fixedly installed at one end of the interception net 11, and toothed blocks are provided at equal intervals on the side wall of the slide plate 12. The toothed blocks of the slide plate 12 are meshed with the gear of the electric drive rod 13. The gear of the electric drive rod 13 is an incomplete gear, and its teeth occupy half of the circumference. The electric drive rod 13 is installed on the outer wall of the screening box 1 through the bracket. A strip cover is provided on the outer wall of the screening box 1, and a spring connected to the interception net 11 is installed inside the strip cover of the screening box 1.
[0038] Referring to the attached diagrams in the instruction manual Figures 1-6As shown, the intercepting net 11 is slidably connected to the track at the bottom of the screening box 1 via the sliding plate 12, ensuring smooth sliding of the intercepting net 11. A bracket for the electric drive rod 13 is installed on the outer wall of the screening box 1. The electric drive rod 13 is mounted on the bracket, ensuring that the gear of the electric drive rod 13 meshes correctly with the toothed blocks on the side wall of the sliding plate 12. Simultaneously, a strip cover is installed on the outer wall of the screening box 1, and a spring connected to the intercepting net 11 is placed inside the strip cover. The preload of the spring is adjusted to ensure that the intercepting net 11 can reciprocate normally under the drive of the electric drive rod 13 and the assistance of the spring. During use… A small amount of commercial concrete aggregate to be screened is slowly poured into the screening box 1. At this time, the material flows under the action of the guide frame 3, the first diversion plate 4, and the second diversion plate 10. The material is evenly distributed on the screening frame 6 and the intercepting net 11. Then, according to the actual screening situation, the rotation speed of the electric drive rod 13 and the tilt angle of the screening frame 6 are adjusted appropriately. After screening, the aggregates of different particle sizes fall from the screening frame 6 and the intercepting net 11 respectively, and are discharged through the bottom opening of the screening box 1 to enter the subsequent storage or batching stage. The discharge port is cleaned regularly to prevent material accumulation from affecting the smooth discharge.
[0039] Working principle: When using this multi-stage screening device for commercial concrete production, the material to be screened is poured in from above the screening box 1. Since a diversion plate 4 is installed on one side of the closed cover 2, the material flows into the screening frame 6 and the screening screen 7 of the first layer. When the material slides on the screening screen 7, particles smaller than the aperture of the screening screen 7 will fall through the screen, achieving preliminary screening. At the same time, due to the presence of the spring frame 8, the screening screen 7 can vibrate to a certain extent, which helps to improve screening efficiency and prevent screen blockage. The material screened by the upper screening rack 6 continues to fall onto the lower screening rack 6 for further screening. Screening meshes 7 with different apertures achieve multi-stage screening. The screening effect is achieved by setting up multiple screening racks 6 and screening meshes 7. The position of the screening rack 6 is fixed by bolting the positioning frame 5 and the shaft. Since the outer wall of the opening of the closed cover 2 is provided with an inclined guide frame 3, the screened material can be smoothly sent out of the screening box 1. At the same time, the inner wall of the closed cover 2 is fixed with a diversion plate 4. The diversion plate 4 is an inclined plate that can initially divert the poured material, so that the material is more evenly distributed on the screening rack 6 below.
[0040] After being screened by the two-layer screening rack 6, the material falls onto the intercepting net 11. The aperture of the intercepting net 11 is smaller than that of the screening net 7, allowing for finer screening of the material. The intercepting net 11 is used to collect the fine particles that finally meet the requirements. The electric drive rotor 13 is mounted on the outer wall of the screening box 1 via a bracket. When the electric drive rotor 13 rotates, the incomplete gear meshes with the toothed block of the slide plate 12, driving the intercepting net 11 to reciprocate. At the same time, a spring connected to the intercepting net 11 is installed inside the noodle-shaped cover on the outer wall of the screening box 1. The spring plays a role in assisting in resetting. The reciprocating motion of the intercepting net 11 can further promote material screening, prevent material accumulation, and improve screening efficiency. In addition, the reciprocating motion also helps to shake off particles that may adhere to the intercepting net 11, keeping the screen unobstructed and increasing the overall practicality.
[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-stage screening device for commercial concrete production, comprising: The screening box (1) is configured as a rectangular box structure. A closed cover (2) is snapped onto one side of the screening box (1), and two layers of screening racks (6) are vertically placed inside the screening box (1). An intercepting net (11) is slidably connected to the bottom of the screening box (1). The intercepting net (11) and the screening rack (6) constitute a screening structure for commercial concrete production. The feature is that: the side wall of the screening box (1) is symmetrically provided with a positioning cavity (9), and a positioning frame (5) is engaged in the positioning cavity (9). The positioning frame (5) passes through the screening frame (6) through the shaft, and a rectangular opening is provided in the screening frame (6). A spring frame (8) is installed in the rectangular opening of the screening frame (6), and the top of the spring of the spring frame (8) abuts against the screening screen (7), and the screening screen (7) slides in the rectangular opening of the screening frame (6). The closed cover (2) has the same number of openings as the screening rack (6), and one end of the screening rack (6) abuts against the bottom end of the opening of the closed cover (2). The outer wall of the opening of the closed cover (2) is provided with an inclined guide frame (3), and the inner wall of the closed cover (2) is fixed with a diversion plate one (4). The diversion plate one (4) is above the screening rack (6), and the screening rack (6) is above the diversion plate two (10). There is an interception net (11) below the screening rack (6).
2. The screening device for commercial concrete production with multi-stage screening according to claim 1, characterized in that: The screening box (1) and the closed cover (2) form a box structure with an upper opening, and the bottom of the screening box (1) is provided with an opening.
3. The screening device for commercial concrete production with multi-stage screening according to claim 1, characterized in that: The first diversion plate (4) is a plate with an inclined surface, and the first diversion plate (4) and the second diversion plate (10) are both engaged and connected to the surface of the closed cover (2).
4. The screening device for commercial concrete production with multi-stage screening according to claim 1, characterized in that: The screening frame (6) is inclined, and the inclination direction of the screening frame (6) is intersected with the inclination direction of the diversion plate (4).
5. A multi-stage screening device for commercial concrete production according to claim 3, characterized in that: The diverter plate 2 (10) is above the interceptor net (11), and the aperture of the interceptor net (11) is smaller than the aperture of the sieve net (7).
6. The screening device for commercial concrete production with multi-stage screening according to claim 1, characterized in that: The interception net (11) has a slide plate (12) fixedly installed at one end, and the slide plate (12) has toothed blocks at equal intervals on its side wall. The toothed blocks of the slide plate (12) are meshed with the gear of the electric drive rod (13), and the gear of the electric drive rod (13) is an incomplete gear, with its teeth occupying half of the circumference.
7. A multi-stage screening device for commercial concrete production according to claim 6, characterized in that: The electric drive rotor (13) is mounted on the outer wall of the screening box (1) via a bracket, and the outer wall of the screening box (1) is provided with a strip cover, and a spring connected to the intercepting net (11) is installed inside the strip cover of the screening box (1).