Novel grader
By designing a new classifier, the impeller shaft stabilizes the operation of the impeller, reduces the requirements of dynamic balance and production accuracy, and uses secondary air components to improve the classification accuracy, solving the problems of low grading accuracy and production efficiency in the existing technology, and achieving stable and efficient grading of the impeller operation.
Patent Information
- Application Number
- CN202421481070.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The existing ultrafine powder graders have high requirements for dynamic balance accuracy and impeller production accuracy, and it is difficult to achieve medium- and high-speed rotation, which limits the grading accuracy and production efficiency.
A new classifier was designed, and the impeller shaft stably drives the impeller operation, allowing the use of large-diameter impellers, reducing dynamic balance and production accuracy requirements, and improving the classification accuracy through secondary air components.
It achieves smooth operation of impeller and high grading accuracy, reduces energy consumption and impeller production difficulty, and improves production efficiency.
Smart Images
Figure CN222805592U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ultrafine powder classification equipment, in particular to a new type of classifier. Background Art
[0002] With the development of society and the needs of people's lives, the industry has an increasing demand for various fine powders, and the requirements for fineness, purity and pass rate are also getting higher and higher. Classifiers that can process high-pass rate micro-powders are usually extremely expensive and have low productivity. At this stage, ultrafine powder classifiers have been widely used in mines such as quartz and calcium carbonate and in many industries such as chemical, food and medicine. According to the installation form of the classifying impeller, they can be divided into two categories: vertical and horizontal.
[0003] Vertical ultrafine powder classifiers usually use a sleeve to stabilize the upper end of the impeller shaft and connect the power components, and the impeller is installed on the cantilever at the lower end of the impeller shaft. During the classification process, due to the high requirements for the dynamic balancing accuracy of the impeller, the impeller manufacturing accuracy is required to be high. In addition, the impeller is prone to vibrate during rotation and is not suitable for medium and high-speed rotation. The horizontal ultrafine powder classifier can use a single impeller or a multi-impeller structure, but it also works in a cantilevered manner. Not only will there be high requirements for dynamic balancing accuracy and impeller manufacturing accuracy, but it is also only suitable for small-diameter impeller structures.
[0004] Therefore, it is an urgent problem to be solved at this stage to develop and design a new type of classifier with stable impeller operation, low requirements on dynamic balancing accuracy and impeller manufacturing accuracy, high grading accuracy and low energy consumption. Utility Model Content
[0005] In response to the problems existing in the prior art, the utility model provides a new type of classifier, in which the impeller shaft can stably drive the impeller to operate, a large diameter impeller can be conveniently used, and the energy consumption is low; at the same time, in the classification process of fine powders, the requirements for dynamic balancing accuracy and impeller manufacturing accuracy are low, which reduces the difficulty of impeller manufacturing; further, the falling materials can be blown to the impeller again for classification through the secondary air component, which can effectively improve the classification accuracy; the structure is simple and easy to use.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0007] The utility model provides a novel classifier, comprising:
[0008] A classification chamber, wherein the classification chamber has a feed inlet, a fine material outlet and a coarse material outlet;
[0009] An impeller shaft, the impeller shaft is arranged in the classification chamber, the impeller shaft is coaxially arranged with the fine material outlet; the impeller shaft is connected to a driving assembly for driving the impeller shaft to rotate; a plurality of impellers are arranged on the impeller shaft, and the impellers are located above the feed inlet; when the impeller rotates, the air in the classification chamber can have a tendency to flow toward the fine material outlet;
[0010] A collecting hopper, the collecting hopper is arranged in the classification chamber and below the impeller;
[0011] A secondary air component is provided in the classification chamber and below the collecting hopper, and the secondary air component can make the air in the classification chamber tend to flow toward the impeller; the coarse material outlet is located below the secondary air component.
[0012] As a preferred technical solution, the classification chamber is vertically arranged, and the axis of the fine material outlet is horizontally arranged.
[0013] As a preferred technical solution, a fine material outlet pipe is provided on the classification chamber, the fine material outlet pipe forms the fine material outlet, part of the fine material outlet pipe extends into the classification chamber, and part of the fine material outlet pipe extends from the classification chamber.
[0014] As a preferred technical solution, one end of the impeller shaft is located in the fine material outlet pipe, and the other end of the impeller shaft passes through the classification chamber; the drive assembly is transmission-connected to the end of the impeller shaft extending out of the classification chamber.
[0015] As a preferred technical solution, the driving component is configured as a motor, the motor is fixed to the outer wall of the grading chamber, pulleys are provided on the output shaft of the motor and the impeller shaft, and the two pulleys are connected by a transmission belt.
[0016] As a preferred technical solution, a first bearing is provided in the fine material outlet pipe, a second bearing is provided on the grading chamber, the impeller shaft passes through the first bearing and the second bearing in sequence, and the impeller shaft is fixedly connected to the inner rings of the first bearing and the second bearing respectively.
[0017] As a preferred technical solution, an air inlet pipe is provided on the classification chamber, and the air inlet pipe extends into the classification chamber and is connected with the interior of the fine material outlet pipe.
[0018] As a preferred technical solution, the feed inlet is located below the secondary air component.
[0019] As a preferred technical solution, an observation window is provided on the grading chamber.
[0020] As a preferred technical solution, the coarse material outlet extends downward, and a discharge valve is provided at the coarse material outlet.
[0021] The beneficial effects of the utility model are as follows:
[0022] The impeller shaft of the utility model can be conveniently positioned in the grading chamber and can thus stably drive the impeller to operate, and can conveniently use a large-diameter impeller, can be applied to large-scale grading equipment, and has low energy consumption, which is 60% of that of a vertical ultrafine powder classifier and 30% of that of a horizontal ultrafine powder classifier; at the same time, in the grading process of fine powders, the requirements for dynamic balancing accuracy and impeller manufacturing accuracy can be reduced by two levels, greatly reducing the difficulty of impeller manufacturing; further, the falling material can be blown to the impeller again for grading through the secondary air component, which can accurately divide the particle size and effectively improve the grading accuracy; the structure is simple, easy to use, and has excellent performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a novel classifier of the utility model;
[0024] Figure 2 for Figure 1 A magnified image of area A;
[0025] Figure 3 for Figure 2 Magnified view of area B.
[0026] In the figure: 1-classification chamber, 11-feed port, 12-fine material outlet, 13-coarse material outlet, 131-discharge valve, 14-fine material outlet pipe, 141-first bearing, 15-second bearing, 16-air inlet pipe, 17-observation window, 2-impeller shaft, 21-drive assembly, 211-pulley, 212-transmission belt, 22-impeller, 3-collection hopper, 4-secondary air assembly. DETAILED DESCRIPTION
[0027] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.
[0028] Please refer to Figure 1-Figure 3, which is an embodiment of a new type of classifier provided by the utility model, comprises a classifying chamber 1, the classifying chamber 1 is provided with a feed inlet 11, a fine material outlet 12 and a coarse material outlet 13, fine powders enter the classifying chamber 1 through the feed inlet 11, the classified ultrafine powders are discharged from the fine material outlet 12, and the classified coarse particles are discharged from the coarse material outlet 13; an impeller shaft 2 is arranged in the classifying chamber 1, the impeller shaft 2 is coaxially arranged with the fine material outlet 12, the impeller shaft 2 is connected with a driving assembly 21 for driving the impeller shaft 2 to rotate, a plurality of impellers 22 are arranged on the impeller shaft 2, the impeller 22 is located above the feed inlet 11, the impeller shaft 2 can stably drive the impeller 22 to operate and can conveniently use a large diameter impeller, and the energy consumption is low; when the impeller 22 rotates, the air in the classifying chamber 1 can have a tendency to flow toward the fine material outlet 12 The air in the grading chamber 1 has a collecting hopper 3 located below the impeller 22, which can collect the fallen coarse particles. The secondary air component 4 is located below the collecting hopper 3. The secondary air component 4 can make the air in the grading chamber 1 have a tendency to flow toward the impeller 22, so that the ultrafine powder mixed with the coarse particles in the collecting hopper 3 flows toward the impeller 22 again, ensuring that the ultrafine powder in the fine powder is discharged from the fine material outlet 12, and the ultrafine powder can be accurately divided according to the particle size, which effectively improves the grading accuracy. The coarse material outlet 13 is located below the secondary air component 4, and the classified coarse particles fall into the coarse material outlet 13 under the action of gravity.
[0029] It should be noted that the secondary air component 4 is preferably configured as a fan so as to effectively allow the air in the classification chamber 1 to flow toward the impeller 22 .
[0030] For further information, please refer to Figure 1-Figure 3 The grading chamber 1 should be arranged vertically, so that the fine powder can form a reasonable and stable gas-solid two-phase flow under the combined action of gravity and the wind force generated by the rotation of the impeller 22, thereby ensuring high-precision classification of the fine powder; the axis of the fine material outlet 12 is arranged horizontally, and the impeller 22 rotates to generate horizontal wind force, which can better control the size of the generated wind force, ensuring accurate classification of the fine powder, while facilitating the use of a large-diameter impeller 22, and having lower requirements on dynamic balancing accuracy and impeller 22 manufacturing accuracy.
[0031] In this embodiment, please refer to Figure 1 and Figure 2 A fine material outlet pipe 14 is provided on the grading chamber 1, and the fine material outlet pipe 14 forms a fine material outlet 12. Part of the fine material outlet pipe 14 extends into the grading chamber 1, and part of the fine material outlet pipe 14 extends from the grading chamber 1. The fine material outlet pipe 14 can be stably fixed on the grading chamber 1. The fine material outlet pipe 14 located in the grading chamber 1 can reduce the suction force of the impeller 22 on the fine powder, and can more accurately control the grading accuracy of the fine powder.
[0032] Based on the above examples, please refer to Figure 1 and Figure 2 One end of the impeller shaft 2 is located in the fine material outlet pipe 14, and the other end of the impeller shaft 2 passes through the classification chamber 1. The impeller shaft 2 can be stably positioned and rotated; the driving component 21 is transmission connected to the end of the impeller shaft 2 extending out of the classification chamber 1, which can conveniently drive the impeller shaft 2 to rotate.
[0033] For further information, please refer to Figure 1 and Figure 2 The driving component 21 is preferably configured as a motor, and the motor is fixed on the outer wall of the grading chamber 1. Pulleys 211 are provided on the output shaft of the motor and the impeller shaft 2. The two pulleys 211 are connected by a transmission belt 212. The rotation of the output shaft of the motor can drive the impeller shaft 2 to rotate; specifically, the pulley 211 is configured as a belt pulley, and the transmission belt 212 is configured as a transmission belt; in other embodiments, the output shaft of the motor and the impeller shaft 2 can also be connected by gears or chains, so as to stably drive the impeller shaft 2 to rotate.
[0034] For further information, please refer to Figure 1 and Figure 2 A first bearing 141 is provided in the fine material outlet pipe 14, a second bearing 15 is provided on the classification chamber 1, the impeller shaft 2 passes through the first bearing 141 and the second bearing 15 in sequence, the impeller shaft 2 is fixedly connected to the inner rings of the first bearing 141 and the second bearing 15 respectively, and the impeller shaft 2 can stably drive the impeller 22 to rotate; specifically, the first bearing 141 can be fixed to the inner wall of the fine material outlet pipe 14 by a plurality of reinforcing ribs, and the impeller shaft 2 is rotationally sealed and connected to the classification chamber 1 through the second bearing 15.
[0035] In this embodiment, please refer to Figure 1 and Figure 2 An air inlet pipe 16 is provided on the classification chamber 1. The air inlet pipe 16 extends into the classification chamber 1 and is connected with the interior of the fine material outlet pipe 14. When the impeller 22 rotates, external air can enter the fine material outlet pipe 14 from the air inlet pipe 16, which can also reduce the suction of the fine powder in the classification chamber 1 caused by the rotation of the impeller 22, and can effectively improve the classification accuracy.
[0036] For further information, please refer to Figure 1 and Figure 2 An observation window 17 is provided at a position of the classification chamber 1 corresponding to the impeller 22, through which the rotation of the impeller 22 and the classification status of the fine powder can be intuitively understood.
[0037] In this embodiment, please refer to Figure 1 and Figure 3The coarse material outlet 13 extends downward, so that coarser particles can be collected at the coarse material outlet 13 and discharged smoothly; a discharge valve 131 is provided at the coarse material outlet 13, and the discharge valve 131 can control the switch of the coarse material outlet 13.
[0038] In this embodiment, please refer to Figure 1 and Figure 3 The feed port 11 is preferably located below the secondary air component 4 and outside the collecting hopper 3 . When the fine powder enters the classification chamber 1 , the secondary air component 4 can promote the fine powder to flow to the impeller 22 .
[0039] The specific working process of the utility model is as follows:
[0040] Fine powder is stored in the raw material bin or directly produced by the grinding equipment, and the fine material outlet 12 is connected to the cyclone collector, dust collector and induced draft fan in sequence;
[0041] When the fine powder enters the classification chamber 1 through the feed port 11, a reasonable and stable gas-solid two-phase flow can be formed in the classification chamber 1 by adjusting the rotation speed of the impeller 22. Under the combined action of the centrifugal force generated by the rotation of the impeller 22 and the suction force generated by the induced draft fan, the fine powder can be separated into fine powder and coarse particles according to the particle size. The fine powder is discharged along the fine material outlet 12 under the action of the impeller 22.
[0042] After the coarser particles fall and are collected by the collecting hopper 3, the fine powder mixed in the coarser particles can rise to the impeller 22 with the air flow under the action of the secondary air component 4, and the screened coarser particles are gathered at the coarse material outlet 13 and discharged by the discharge valve 131, thereby achieving high-precision classification of the fine powder.
[0043] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A new type of classifier, characterized in that: include: A classification chamber (1), wherein the classification chamber (1) has a feed inlet (11), a fine material outlet (12) and a coarse material outlet (13); an impeller shaft (2), the impeller shaft (2) being arranged in the classification chamber (1), the impeller shaft (2) being coaxially arranged with the fine material outlet (12); the impeller shaft (2) being connected to a driving assembly (21) for driving the impeller shaft (2) to rotate; a plurality of impellers (22) being arranged on the impeller shaft (2), the impellers (22) being located above the feed inlet (11); when the impellers (22) rotate, the air in the classification chamber (1) can have a tendency to flow toward the fine material outlet (12); A collecting hopper (3), the collecting hopper (3) being arranged in the classification chamber (1) and located below the impeller (22); A secondary air component (4), wherein the secondary air component (4) is arranged in the classification chamber (1) and is located below the collecting hopper (3), and the secondary air component (4) can cause the air in the classification chamber (1) to have a tendency to flow toward the impeller (22); the coarse material outlet (13) is located below the secondary air component (4).
2. A novel classifier according to claim 1, characterized in that: The classification chamber (1) is arranged vertically, and the axis of the fine material outlet (12) is arranged horizontally.
3. A novel classifier according to claim 2, characterized in that: The classification chamber (1) is provided with a fine material outlet pipe (14), the fine material outlet pipe (14) forming the fine material outlet (12), part of the fine material outlet pipe (14) extending into the classification chamber (1), and part of the fine material outlet pipe (14) extending from the classification chamber (1).
4. A novel classifier according to claim 3, characterized in that: One end of the impeller shaft (2) is located in the fine material outlet pipe (14), and the other end of the impeller shaft (2) passes through the classification chamber (1); the driving component (21) is in transmission connection with the end of the impeller shaft (2) extending out of the classification chamber (1).
5. A novel classifier according to claim 4, characterized in that: The driving component (21) is configured as a motor, the motor is fixed on the outer wall of the classification chamber (1), the output shaft of the motor and the impeller shaft (2) are both provided with pulleys (211), and the two pulleys (211) are connected in transmission via a transmission belt (212).
6. A novel classifier according to claim 5, characterized in that: A first bearing (141) is provided in the fine material outlet pipe (14), a second bearing (15) is provided on the classification chamber (1), the impeller shaft (2) passes through the first bearing (141) and the second bearing (15) in sequence, and the impeller shaft (2) is fixedly connected to the inner rings of the first bearing (141) and the second bearing (15), respectively.
7. A novel classifier according to claim 3, characterized in that: The classification chamber (1) is provided with an air inlet pipe (16), which extends into the classification chamber (1) and is communicated with the interior of the fine material outlet pipe (14).
8. A novel classifier according to claim 1, characterized in that: The feed inlet (11) is located below the secondary air component (4).
9. A novel classifier according to claim 1, characterized in that: The classification chamber (1) is provided with an observation window (17).
10. A novel classifier according to claim 1, characterized in that: The coarse material outlet (13) extends downward, and a discharge valve (131) is provided at the coarse material outlet (13).