Mechanism sand grading device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANRUI GRP ZHENGZHOU CEMENT CO LTD
- Filing Date
- 2025-08-25
- Publication Date
- 2026-08-07
AI Technical Summary
[0004]本实用新型的目的在于克服现有技术中机制砂选粉机在使用过程中粗砂及细砂之间不能调节、进风效果影响效果的不足，提供一种机制砂分级装置
[0010]本实用新型实施例的有益效果为：出口上部设置有分料板，用于调节粗细砂的出料比例，选粉机内部设置多层分料隔板，顶部隔板配备调节杆以控制倾斜角度，进风口位于选粉机下部近粗砂出口侧，采用下进风方式优化风场分布，通过驱动装置的运动控制分料板与水平面的夹角，实现分级调节，通过使用下进风设计、分料板动态调节、过料箱体导流三重技术协同，解决了传统机制砂分选设备风速不均、分离不可调的技术难题，下进风结构配合螺旋导流，实现风速均匀化，分料板与隔板角度可调，适应多级配需求，过料箱体倾斜结构减少颗粒二次混合，极大地提高使用效果。
Smart Images
Figure CN224599862U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of manufactured sand grading technology, specifically to a manufactured sand grading device. Background Technology
[0002] With the increasing depletion of river sand resources and the growing emphasis on ecological and environmental protection, manufactured sand is gradually replacing natural sand. Manufactured sand refers to rock, mine tailings, or process waste particles with a particle size of less than 4.75mm, produced through mechanical crushing and screening after soil removal. It does not include soft or weathered granular sand; it is also known as artificial sand. According to GB / T14684-2011, particles smaller than 75μm in manufactured sand must be at least 10%. Therefore, a combination of dynamic and static sorting techniques is typically used for manufactured sand sorting. Dynamic sorting removes particles smaller than 75μm, while static sorting removes particles between 75μm and 4.75mm.
[0003] Current manufactured sand sorting equipment mainly uses air classifiers, and existing static manufactured sand sorting equipment usually adopts a top air intake method (such as...). Figure 1 As shown in the figure, the wind speed is high in the upper part of the sorting area and low in the lower part, resulting in poor sorting effect and the separation between coarse and fine sand cannot be adjusted. Therefore, this technical solution is proposed for improvement. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of existing manufactured sand classifiers, such as the inability to adjust between coarse and fine sand and the impact of air intake on performance, and to provide a manufactured sand grading device.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a manufactured sand grading device, comprising a classifier body, wherein an inlet and an outlet are provided at the upper part of the classifier body, a sealing plate is provided between the inlet and the outlet, a coarse sand outlet and a fine sand outlet are provided at the bottom of the classifier body, and a distribution plate for adjusting the discharge amount is provided between the coarse sand outlet and the fine sand outlet.
[0006] Furthermore, a driving device is provided at the bottom of the material distribution plate, and the driving device controls the material distribution angle of the material distribution plate.
[0007] Furthermore, a feed box is provided above the fine sand outlet, and the upper part of the feed box is inclined toward the coarse sand outlet.
[0008] Furthermore, the powder classifier is equipped with multiple material distribution partitions inside, and the top material distribution partition is equipped with an adjustment rod for adjusting the tilt angle.
[0009] Furthermore, the air inlet of the air classifier is located on the lower side near the coarse sand outlet.
[0010] The beneficial effects of this utility model embodiment are as follows: A material distribution plate is provided at the upper part of the outlet to adjust the output ratio of coarse and fine sand. The air classifier is equipped with multiple layers of material distribution partitions inside. The top partition is equipped with an adjustment rod to control the tilt angle. The air inlet is located at the lower part of the air classifier near the coarse sand outlet. The bottom air intake method optimizes the air field distribution. The angle between the material distribution plate and the horizontal plane is controlled by the movement of the drive device to achieve graded adjustment. By using the bottom air intake design, dynamic adjustment of the material distribution plate, and flow guide of the feed box, the technical problems of uneven air velocity and unadjustable separation in traditional manufactured sand sorting equipment are solved. The bottom air intake structure combined with the spiral flow guide achieves uniform air velocity. The angle between the material distribution plate and the partition is adjustable to adapt to multi-gradation requirements. The tilted structure of the feed box reduces secondary mixing of particles and greatly improves the performance. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the existing overall structure;
[0012] Figure 2 This is a schematic diagram of the overall structure of this utility model;
[0013] Figure 3 This is a schematic diagram of the structure of this utility model;
[0014] In the diagram: 1. Classifier body; 2. Feed inlet; 201. Baffle plate; 202. Adjusting plate; 3. Air outlet; 301. Sealing plate; 4. Air inlet; 5. Coarse sand outlet; 6. Fine sand outlet; 601. Material handling box; 602. Material distribution plate. Detailed Implementation
[0015] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely for explaining the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.
[0016] See Figures 2 to 3 This utility model discloses a manufactured sand grading device, mainly including a classifier body 1, with a feed inlet 2 and an air outlet 3 at the top. The upper parts of the two are separated by a sealing plate 301. Compared with the existing classifiers, the isolation distance between the two is increased, forming a longer independent feed and exhaust channel. The bottom of the classifier body 1 is provided with a coarse sand outlet 5 and a fine sand outlet 6. The upper part of the two outlets is provided with a material distribution plate 602 for adjusting the output ratio of coarse and fine sand. The classifier is equipped with multiple layers of material distribution baffles 201. The top baffle 201 is equipped with an adjusting rod 202 to control the tilt angle. The air inlet 4 is located at the lower part of the classifier near the coarse sand outlet 5, and the bottom air intake method optimizes the air field distribution.
[0017] The bottom of the distribution plate 602 is connected to a drive device (such as an electric push rod or hydraulic cylinder). The angle between the distribution plate 602 and the horizontal plane is controlled by the movement of the drive device. When it is necessary to increase the output of coarse sand, the drive device pushes the distribution plate 602 to tilt to the left, expanding the effective flow area of the coarse sand outlet 5. Conversely, it tilts to the right to increase the output of fine sand, so that the separation ratio of coarse and fine sand can be adjusted in real time according to actual needs. For example, when the gradation requirements of manufactured sand change, the drive device is linked by the PLC control system to realize the grading adjustment. A feed box 601 is set above the fine sand outlet 6. Its top is inclined towards the coarse sand outlet 5, and it forms a guide slope with the distribution plate 602. When the fine sand particles move upward under the action of wind, the inclined structure of the feed box 601 can reduce the backflow of particles, and at the same time guide some of the intermediate-sized particles that are not completely separated to re-enter the sorting area. The multi-layer material distribution baffles 201 inside the air classifier further enhance the classification effect: the top baffle 201 changes the tilt angle through the adjusting rod 202 to control the residence time of particles in the sorting zone; the middle baffle 201 adopts a sawtooth structure to increase the probability of particle collision and improve separation efficiency.
[0018] The air inlet 4 is located at the bottom of the air classifier near the coarse sand outlet 5, causing the airflow to move in a spiral motion from the bottom upwards, thus forming a uniform upward airflow field. This avoids the problem of excessively high upper wind speed caused by traditional top air inlet methods. The air inlet 4 is equipped with a guide plate to direct the airflow to the central area of the air classifier. At the same time, the wind speed is adjusted by a variable frequency fan, so that particles smaller than 75μm are fully carried to the air outlet 3, while particles between 75μm and 4.75mm fall into the fine sand outlet 6 under the action of gravity and centrifugal force. For example, when processing manufactured sand with a high powder content, the fan frequency can be reduced to reduce over-grinding.
[0019] After the manufactured sand enters through the feed inlet 2, it first forms a material curtain below the sealing plate 301, making full contact with the downward airflow. Particles smaller than 75μm are carried by the airflow through the air outlet 3 into the subsequent dust collection system; particles between 75μm and 4.75mm slide down the inclined surface to the fine sand outlet 6 under the combined action of the distribution baffle 201 and the feed box 601; coarse particles larger than 4.75mm are directly discharged from the coarse sand outlet 5. The separation particle size can be dynamically adjusted by adjusting the angle of the distribution plate 602 and the inclination of the top baffle 201.
[0020] Laboratory tests showed that after adopting this device, the content of particles smaller than 75μm in the manufactured sand was stably controlled below 8% (meeting the requirements of GB / T14684-2011), and the separation efficiency of coarse and fine sand was improved by more than 30% compared with traditional equipment. In a tailings treatment project of a mine, the device operated continuously for 6 months without any wind field disturbance or reduction in separation effect, verifying its structural reliability and adaptability.
[0021] By employing a combination of technologies—a bottom-inlet design, dynamic adjustment of the material distribution plate 602, and airflow guidance of the material handling box 601—the technical challenges of uneven airflow and unadjustable separation in traditional manufactured sand sorting equipment are solved. The bottom-inlet structure, combined with spiral airflow guidance, achieves uniform airflow. The angle between the material distribution plate 602 and the baffle 201 is adjustable to meet multi-stage requirements. The inclined structure of the material handling box 601 reduces secondary mixing of particles, greatly improving the performance.
[0022] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0024] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.
[0025] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.
Claims
1. A manufactured sand grading device, comprising a classifier body, characterized in that: The upper part of the classifier body is provided with a feed inlet and an air outlet, and a sealing plate is provided between the feed inlet and the air outlet. The bottom of the classifier body is provided with a coarse sand outlet and a fine sand outlet, and a material distribution plate for adjusting the discharge amount is provided between the coarse sand outlet and the fine sand outlet.
2. The manufactured sand grading device according to claim 1, characterized in that: A driving device is provided at the bottom of the material distribution plate, and the driving device controls the material distribution angle of the material distribution plate.
3. The manufactured sand grading device according to claim 1, characterized in that: The upper part of the fine sand outlet is provided with a feed box, and the upper part of the feed box is inclined towards the coarse sand outlet.
4. The manufactured sand grading device according to claim 1, characterized in that: The air classifier is equipped with multiple material distribution partitions inside, and the top material distribution partition is equipped with an adjustment rod for adjusting the tilt angle.
5. The manufactured sand grading device according to claim 1, characterized in that: The air inlet of the air classifier is located at the bottom near the coarse sand outlet.