A powder selecting device with secondary screening function
By designing a powder classifier with secondary screening function, and utilizing airflow circulation and rotor crushing technology, the problem that existing equipment cannot effectively screen coarse, medium and fine powders has been solved, achieving efficient multi-stage separation and reducing the floor space required.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU JIAOTONG JINGSHI MINING CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-24
AI Technical Summary
Existing powder classifiers lack secondary screening capabilities, resulting in a large overall footprint and an inability to effectively screen coarse, medium, and fine powders, leading to low powder classification efficiency.
A powder classifier with secondary screening function was designed. By setting powder classifier components and auxiliary components, and utilizing airflow circulation and rotor crushing technology, multi-stage separation of materials and efficient collection of fine powder can be achieved.
It achieves efficient multi-stage separation of materials, improves powder selection efficiency, reduces floor space, and can better screen out coarse, medium and fine powders.
Smart Images
Figure CN224542360U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of powder selection device technology, specifically to a powder selection device with secondary screening function. Background Technology
[0002] In the field of manufactured sand production, with the increasing demand for sand and gravel aggregates from industries such as infrastructure construction, the optimization and upgrading of manufactured sand production processes and related equipment are becoming increasingly important. Currently, the manufactured sand production process often involves a powder selection stage, which aims to effectively separate and classify fine particulate matter such as stone powder in manufactured sand to meet the requirements of different engineering applications for sand and gravel quality.
[0003] Existing air classifiers are generally based on rotor air classifiers or V-type static air classifiers. For example, in some dry sand making processes, such air classifiers use multi-stage dispersing and grading structures and cage rotor devices to classify manufactured sand. At the same time, in the air classifier process, manufactured sand is often transported by equipment such as belt conveyors and bucket elevators, and stone powder is stored by adding storage tanks.
[0004] However, existing air classifiers lack secondary screening functions to further optimize particle size distribution. They cannot effectively combine rotor air classifiers and V-type static air classifiers, resulting in a large overall footprint, which is not conducive to some production environments with limited space. They also cannot effectively screen out coarse, medium and fine powders, and the air classifier efficiency needs to be improved.
[0005] In view of this, we propose a powder classifier with a secondary screening function. Utility Model Content
[0006] The purpose of this invention is to provide a powder selection device with a secondary screening function to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A powder classifying device with secondary screening function includes a frame, a sorting box fixedly installed on the top of the frame, a coarse material inlet fixedly installed at one bottom end of the sorting box, a medium material box snapped into the other bottom end of the sorting box, a dust collection box fixedly installed at one top end of the sorting box, and a powder classifying component provided on the sorting box, the powder classifying component including:
[0009] The sorting box has a feed inlet at one end of its top. A receiving plate is fixedly installed on one side of the inside of the sorting box. A breaking strip is fixedly installed on the upper surface of the receiving plate. A first baffle is fixedly installed on the inner wall of the top of the sorting box. The receiving plate, breaking strip, and first baffle are located below the feed inlet. A second baffle is also fixedly installed on the inner wall of the top of the sorting box.
[0010] A blower is fixedly installed on the top of the sorting box. An air inlet pipe is fixedly installed at the input end of the blower. The air inlet pipe is fixedly installed inside the side wall of the dust collector. A circular filter plate is snapped into the air inlet pipe. One end of the air outlet pipe is fixedly connected to the output end of the blower. The other end of the air outlet pipe is fixedly connected to one end of the air outlet hood. The air outlet hood is fixedly installed inside the bottom end of the sorting box. A rectangular filter plate is snapped into the air outlet hood. A third baffle plate is fixedly installed on the inner wall of the bottom end of the sorting box. The third baffle plate is located between the coarse material inlet and the medium material box.
[0011] The dust removal mechanism is provided on the dust removal box. A slide is fixedly installed on the outer wall of the sorting box. A fine powder box is slidably installed inside the slide. A rectangular plate is fixedly installed on the top of the end of the fine powder box away from the sorting box.
[0012] In a further embodiment, the dust removal mechanism includes an air distribution pipe. The air distribution pipe is fixedly installed on the outer wall of the dust removal box. The input end of the air distribution pipe is connected to an air supply device. An air outlet pipe is fixedly installed on the output end of the air distribution pipe. An electromagnetic pulse valve is installed on the air outlet pipe. A nozzle is fixedly installed at one end of the air outlet pipe inside the dust removal box. A bag frame is fixedly installed on the inner wall of the dust removal box. A bag body is fixedly fitted on the outside of the bag frame. The bag body is located directly below the nozzle.
[0013] In a further embodiment, a collection device is provided at the bottom of the coarse material inlet to better collect the coarse material.
[0014] In a further embodiment, the vertical cross-sections of both the receiving plate and the second baffle plate are V-shaped.
[0015] In a further embodiment, the vertical cross-section of the third baffle plate is trapezoidal.
[0016] In a further embodiment, multiple sets of the crushing bars are provided, and the end of the crushing bars facing the second baffle plate is serrated, thereby better crushing and separating the material.
[0017] In a further embodiment, multiple sets of the air outlet pipe, electromagnetic pulse valve, nozzle, bag frame, and bag body are provided to better collect fine powder.
[0018] In a further embodiment, the fan, air inlet pipe, circular filter plate, air outlet pipe, air outlet hood, and rectangular filter plate are arranged in two sets, and the two sets of the fan, air inlet pipe, circular filter plate, air outlet pipe, air outlet hood, and rectangular filter plate are mirrored at both ends of the sorting box with the vertical center line of the sorting box as the mirror axis, so that the airflow can circulate better.
[0019] In a further embodiment, an auxiliary component is provided on the outside of the receiving plate. The auxiliary component includes a servo motor. The servo motor is fixedly installed on the outer wall of the sorting box. A rotating shaft is fixedly installed on the output end of the servo motor. Both ends of the rotating shaft are rotatably installed inside the side wall of the sorting box through sealed bearings. A rotor is fixedly installed on the outer wall of the rotating shaft.
[0020] In a further embodiment, the rotor is provided in multiple sets, and the multiple sets of rotors are linearly arrayed at equal intervals above the coarse material inlet, thereby better crushing and separating the material.
[0021] Compared with the prior art, this utility model provides a powder selection device with secondary screening function, which has the following beneficial effects:
[0022] 1. This powder classifier with secondary screening function, in order to better classify powder, is equipped with a powder classifier component. When the initial material is conveyed into the sorting box through the feed inlet, it is crushed and separated after contacting the receiving plate, crushing bar, and first baffle plate. The second baffle plate then blocks the larger particles, causing them to fall downwards into the coarse material inlet. Before feeding, the fan is started, and together with the air inlet pipe, circular filter plate, air outlet pipe, air outlet hood, and rectangular filter plate, an airflow circulation is formed inside the sorting box and dust collection box. The airflow blows the smaller particles and powder towards the end of the third baffle plate near the middle material box. The smaller particles fall into the middle material box, while the fine powder is carried upwards by the airflow and adheres to the outside of the filter bag body. With the help of the air distribution pipe, air outlet pipe, electromagnetic pulse valve, nozzle, and filter bag frame, the fine powder on the outside of the filter bag body is blown into the fine powder box on the slide, thus completing the secondary screening and enabling better powder classification. By increasing the intensity of the airflow, more fine powder is separated.
[0023] 2. This powder classifier with secondary screening function has auxiliary components to improve the powder classification effect. When the servo motor is started, the rotating shaft rotates and multiple sets of rotors rotate synchronously. The rotors crush the materials passing by, so that dust and large pieces of material are better separated. The smaller particles and dust are better blown to the third baffle plate away from the rotor, thus improving the powder classification effect. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;
[0026] Figure 3 This utility model Figure 2 Enlarged structural diagram of region A in the middle;
[0027] Figure 4This is a cross-sectional view of the sorting box of this utility model;
[0028] Figure 5 This is a cross-sectional view of the sorting box from another perspective of this utility model;
[0029] Figure 6 This utility model Figure 5 Enlarged structural diagram of region B in the middle;
[0030] Figure 7 This is a cross-sectional schematic diagram of the dust collector box and part of the structure of this utility model;
[0031] Figure 8 This is a cross-sectional schematic diagram of the dust collector box of this utility model.
[0032] Explanation of icon numbers:
[0033] 1. Frame; 2. Sorting box; 3. Coarse material inlet; 4. Medium material box; 5. Dust collection box;
[0034] 6. Powder classifier; 61. Feed inlet; 62. Receiving plate; 63. Crushing bar; 64. First baffle plate; 65. Second baffle plate; 66. Fan; 67. Air inlet pipe; 68. Circular filter plate; 69. Air outlet pipe; 610. Air outlet hood; 611. Rectangular filter plate; 612. Third baffle plate; 613. Air distribution pipe; 614. Air outlet pipe; 615. Electromagnetic pulse valve; 616. Nozzle; 617. Bag frame; 618. Bag body; 619. Slide frame; 620. Fine powder box; 621. Rectangular plate;
[0035] 7. Auxiliary components; 71. Servo motor; 72. Rotary shaft; 73. Rotor. Detailed Implementation
[0036] 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.
[0037] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.
[0038] Please see Figures 1-8 This utility model provides a technical solution:
[0039] A powder sorting device with secondary screening function includes a frame 1, a sorting box 2 fixedly installed on the top of the frame 1, a coarse material inlet 3 fixedly installed at one bottom end of the sorting box 2, and a collection device at the bottom end of the coarse material inlet 3. The collection device is existing equipment and will not be shown or described in detail, so as to better collect coarse material. A medium material box 4 is snapped into the other bottom end of the sorting box 2, and a dust collection box 5 is fixedly installed at one top end of the sorting box 2.
[0040] In one embodiment of this utility model, a powder sorting component 6 is provided on the sorting box 2. The powder sorting component 6 includes a feed inlet 61. The feed inlet 61 is fixedly installed at the other end of the top of the sorting box 2. A receiving plate 62 is fixedly installed on one side inside the sorting box 2. A crushing bar 63 is fixedly installed on the upper surface of the receiving plate 62. A first baffle plate 64 is fixedly installed on the inner wall of the top of the sorting box 2. The receiving plate 62, the crushing bar 63, and the first baffle plate 64 are located below the feed inlet 61. A second baffle plate 65 is also fixedly installed on the inner wall of the top of the sorting box 2. In addition, multiple sets of crushing bars 63 are provided, and the end of the crushing bar 63 facing the second baffle plate 65 is serrated, thereby better crushing and separating materials. In addition, the receiving plate 62 and The vertical cross-section of the second baffle plate 65 is V-shaped. A fan 66 is fixedly installed on the top of the sorting box 2. An air inlet pipe 67 is fixedly installed at the input end of the fan 66. The air inlet pipe 67 is fixedly installed inside the side wall of the dust collector 5. A circular filter plate 68 is snapped into the air inlet pipe 67. One end of the air outlet pipe 69 is fixedly connected to the output end of the fan 66. The other end of the air outlet pipe 69 is fixedly connected to one end of the air outlet hood 610. The air outlet hood 610 is fixedly installed inside the bottom of the sorting box 2. A rectangular filter plate 611 is snapped into the air outlet hood 610. In addition, there are two sets of fans 66, air inlet pipe 67, circular filter plate 68, air outlet pipe 69, air outlet hood 610, and rectangular filter plate 611. The rectangular filter plate 68, air outlet duct 69, air outlet hood 610, and rectangular filter plate 611 are all mirror images of the vertical centerline of the sorting box 2, positioned at both ends of the sorting box 2 to improve airflow circulation. A third baffle plate 612 is fixedly installed on the inner wall of the bottom of the sorting box 2. The third baffle plate 612 has a trapezoidal vertical cross-section and is located between the coarse material inlet 3 and the intermediate material box 4. A dust removal mechanism is installed on the dust collector box 5. Further, the dust removal mechanism includes a gas distribution pipe 613. The gas distribution pipe 613 is fixedly installed on the outer wall of the dust collector box 5. The input end of the gas distribution pipe 613 is connected to an existing air supply device, which will not be illustrated or described further. The output end of the gas distribution pipe 613 is fixedly installed with an outlet... An air pipe 614 is provided with an electromagnetic pulse valve 615. A nozzle 616 is fixedly installed at one end of the air pipe 614 inside the dust collector 5. A bag frame 617 is fixedly installed on the inner wall of the dust collector 5. A bag body 618 is fixedly fitted on the outside of the bag frame 617. The bag body 618 is located directly below the nozzle 616. In addition, there are multiple sets of air pipe 614, electromagnetic pulse valve 615, nozzle 616, bag frame 617 and bag body 618 to better collect fine powder. A slide 619 is fixedly installed on the outer wall of the sorting box 2. A fine powder box 620 is slidably installed inside the slide 619. A rectangular plate 621 is fixedly installed on the top of the end of the fine powder box 620 away from the sorting box 2.
[0041] In this embodiment, the initial material enters the sorting box 2 through the feed inlet 61. During its descent, it impacts the inclined receiving plate 62. The crushing strips 63 on the upper surface of the receiving plate 62, with their serrated structure (facing the second baffle plate 65), perform initial crushing and separation on the material. The material also impacts the first baffle plate 64, which disperses the material through impact force. Larger particles, due to inertia and gravity, are guided by the second baffle plate 65 and slide down its inclined surface to the coarse material inlet 3. The bottom collection device completes the collection of coarse materials. Before material conveying, the blower 66 is started, which creates negative pressure through the air inlet pipe 67 to draw gas from the dust collector 5. The gas is further filtered for impurities by the circular filter plate 68 in the air inlet pipe 67, and then conveyed to the air outlet hood 610 through the air outlet pipe 69. It is then blown out evenly through the rectangular filter plate 611, forming a closed airflow circulation between the sorting box 2 and the dust collector 5. The blown airflow blows up the medium and powder materials with smaller particle sizes, causing them to move closer to the third baffle plate 612. One end of the material bin 4 moves, where the smaller particles fall into the medium material bin 4 due to the balance between gravity and airflow force, completing one screening. The fine powder continues to move upward with the airflow. After entering the dust collector 5, the fine powder is intercepted by the bag body 618 outside the bag frame 617 and adheres to its outer wall. When the fan 66 is turned off, the slide 619 is pushed, causing the fine powder bin 620 to slide directly below the dust collector 5. At this time, the air supply equipment and the electromagnetic pulse valve 615 are activated, and compressed air flows through the air distribution pipe 6... 13 is diverted to the air outlet pipe 614 and sprayed at high speed onto the bag frame 617 through the nozzle 616. The airflow impact force causes the bag body 618 to vibrate, and the attached fine powder falls off and falls into the fine powder box 620 below, completing the secondary screening and collection of fine powder. The rectangular plate 621 can prevent fine powder from overflowing. At the same time, by adjusting the wind force of the fan 66, the airflow intensity can be changed. When it is necessary to produce finer products, the wind force can be appropriately increased to improve the airflow intensity and separate more fine powder.
[0042] In one embodiment of this utility model, an auxiliary component 7 is provided on the outside of the receiving plate 62. The auxiliary component 7 includes a servo motor 71. The servo motor 71 is fixedly installed on the outer wall of the sorting box 2. A rotating shaft 72 is fixedly installed on the output end of the servo motor 71. Both ends of the rotating shaft 72 are rotatably installed inside the side wall of the sorting box 2 through sealed bearings. A rotor 73 is fixedly installed on the outer wall of the rotating shaft 72. In addition, multiple sets of rotors 73 are provided, and multiple sets of rotors 73 are linearly arrayed at equal intervals above the coarse material inlet 3, so as to better crush and separate materials.
[0043] In this embodiment, after the servo motor 71 is started, its output shaft drives the rotating shaft 72 to rotate at high speed. Multiple sets of rotors 73 fixed on the outer wall of the rotating shaft 72 move in a circular motion in sync. The blade structure of the rotor 73 strikes the material during the falling process, further crushing the large pieces of material that are not completely crushed. In the crushed material, the smaller particles and dust are carried by the airflow and move towards the end of the third baffle plate 612 away from the rotor 73, effectively reducing the fine powder residue in the coarse material and further improving the powder selection accuracy and efficiency.
[0044] All electrical components mentioned in this application are electrically connected to the PLC controller and 220V AC mains power. The PLC controller is a conventional and known device that can control the fan 66, the electromagnetic pulse valve 615, and the nozzle 616. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding, which are mature in the prior art. The machinery, parts, and equipment are all conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art. The supporting structures of the hydraulic drive structure mentioned in this application, such as the hydraulic tank and the hydraulic pump, are existing equipment and will not be described in detail here.
[0045] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A powder classifier with secondary screening function, comprising a frame (1), a sorting box (2) fixedly installed on the top of the frame (1), a coarse material inlet (3) fixedly installed at one bottom end of the sorting box (2), a medium material box (4) snapped onto the other bottom end of the sorting box (2), and a dust collection box (5) fixedly installed at one top end of the sorting box (2), characterized in that: The sorting box (2) is equipped with a powder sorting component (6), which includes: The sorting box (2) is fixedly installed with a feed inlet (61) at the other end of the top. A receiving plate (62) is fixedly installed on one side of the inside of the sorting box (2). A breaking strip (63) is fixedly installed on the upper surface of the receiving plate (62). A first baffle plate (64) is fixedly installed on the inner wall of the top of the sorting box (2). The receiving plate (62), the breaking strip (63) and the first baffle plate (64) are located below the feed inlet (61). A second baffle plate (65) is also fixedly installed on the inner wall of the top of the sorting box (2). A blower (66) is fixedly installed on the top of the sorting box (2). An air inlet pipe (67) is fixedly installed at the input end of the blower (66). The air inlet pipe (67) is fixedly installed inside the side wall of the dust collector (5). A circular filter plate (68) is snapped inside the air inlet pipe (67). One end of the air outlet pipe (69) is fixedly connected to the output end of the blower (66). The other end of the air outlet pipe (69) is fixedly connected to one end of the air outlet hood (610). The air outlet hood (610) is fixedly installed inside the bottom end of the sorting box (2). A rectangular filter plate (611) is snapped inside the air outlet hood (610). A third baffle plate (612) is fixedly installed on the inner wall of the bottom end of the sorting box (2). The third baffle plate (612) is located between the coarse material inlet (3) and the medium material box (4). The dust removal mechanism is provided on the dust removal box (5). A slide (619) is fixedly installed on the outer wall of the sorting box (2). A fine powder box (620) is slidably installed inside the slide (619). A rectangular plate (621) is fixedly installed on the top of the end of the fine powder box (620) away from the sorting box (2).
2. The powder classifier with secondary screening function according to claim 1, characterized in that: The dust removal mechanism includes a gas distribution pipe (613). The gas distribution pipe (613) is fixedly installed on the outer wall of the dust removal box (5). The input end of the gas distribution pipe (613) is connected to the gas supply equipment. The output end of the gas distribution pipe (613) is fixedly installed with an air outlet pipe (614). An electromagnetic pulse valve (615) is provided on the air outlet pipe (614). A nozzle (616) is fixedly installed at one end of the air outlet pipe (614) inside the dust removal box (5). A bag frame (617) is fixedly installed on the inner wall of the dust removal box (5). A bag body (618) is fixedly fitted on the outside of the bag frame (617). The bag body (618) is located directly below the nozzle (616).
3. The powder classifier with secondary screening function according to claim 1, characterized in that: A collection device is provided at the bottom of the coarse material inlet (3).
4. The powder classifier with secondary screening function according to claim 1, characterized in that: The vertical cross-sections of the receiving plate (62) and the second baffle plate (65) are both V-shaped.
5. A powder classifier with secondary screening function according to claim 1, characterized in that: The vertical cross-section of the third baffle plate (612) is trapezoidal.
6. The powder classifier with secondary screening function according to claim 1, characterized in that: The material breaking strips (63) are provided in multiple sets, and the end of the material breaking strips (63) facing the second baffle plate (65) is serrated.
7. A powder classifier with secondary screening function according to claim 2, characterized in that: The air outlet pipe (614), electromagnetic pulse valve (615), nozzle (616), bag frame (617) and bag body (618) are provided in multiple sets.
8. A powder classifier with secondary screening function according to claim 1, characterized in that: The fan (66), air inlet pipe (67), circular filter plate (68), air outlet pipe (69), air outlet hood (610) and rectangular filter plate (611) are provided in two sets, and the two sets of the fan (66), air inlet pipe (67), circular filter plate (68), air outlet pipe (69), air outlet hood (610) and rectangular filter plate (611) are all mirrored at both ends of the sorting box (2) with the vertical center line of the sorting box (2) as the mirror axis.
9. A powder classifier with secondary screening function according to claim 1, characterized in that: An auxiliary component (7) is provided on the outside of the receiving plate (62). The auxiliary component (7) includes a servo motor (71). The servo motor (71) is fixedly installed on the outer wall of the sorting box (2). A rotating shaft (72) is fixedly installed at the output end of the servo motor (71). Both ends of the rotating shaft (72) are rotatably installed inside the side wall of the sorting box (2) through sealed bearings. A rotor (73) is fixedly installed on the outer wall of the rotating shaft (72).
10. A powder classifier with secondary screening function according to claim 9, characterized in that: The rotor (73) is provided in multiple sets, and the multiple sets of rotors (73) are linearly arrayed at equal intervals above the coarse material inlet (3).