Multistage separation powder concentrator for mill

Abstract

The utility model discloses a multistage separation powder concentrator for a mill, which relates to the technical field of powder concentrators, and comprises an upper shell, a middle cylinder and a dust collecting hopper, the middle part of the bottom end of the upper shell is connected with the middle cylinder, the bottom end of the outer wall of the middle cylinder is welded with the dust collecting hopper, and the top end of the outer wall of the upper shell is connected with a top cover. When the multi-stage separation powder concentrator for the mill is used, impurities such as iron blocks in materials are screened out through the filtering mechanism, hard impurities such as the iron blocks are prevented from entering a screening area in the powder concentrator, and then equipment failure or damage caused by the hard impurities is prevented; according to the powder selecting machine for the multi-stage separation mill, the filter screen plate vibrates repeatedly through the springs, then hard impurities blocked by the filter screen plate are vibrated out, the situation that the filter screen plate is blocked by the hard impurities, and consequently the filtering effect is reduced is prevented, the filter screen plate can be cleaned in the working process of the powder selecting machine, and therefore when the powder selecting machine for the multi-stage separation mill is used, the service life is prolonged. The effects of conveniently filtering hard impurities and preventing the filtering assembly from being blocked are achieved.

Description

Technical Field

[0001] This utility model relates to the field of air classifier technology, specifically to an air classifier for a multi-stage separating mill. Background Technology

[0002] A coal mill is a mechanical device used to crush and grind coal into coal powder. It is widely used in the production industries of cement, silicate products, and glass ceramics. A mill classifier is a device used in a mill system. Its main function is to select qualified fine powder from the mill discharge, so as to avoid excessive grinding of fine powder in the mill, thereby improving the efficiency of the mill and the quality of the products.

[0003] According to announcement number CN113019914A, a high-efficiency three-separation vortex classifier is described. The feed inlet is located above the upper housing, the middle cylinder is located below the upper housing, the ash hopper is located below the middle cylinder, and the motor is located above the upper housing. One end of the rotating shaft is fixedly connected to the output end of the motor, and the other end of the rotating shaft is inserted into the upper housing and fixedly connected to the impeller. Multiple blades are located on the sides of the impeller, and each set of mounting components is located inside the impeller. A support block is located on the inner sidewall of the impeller and has a through hole. A pressure rod is located below the pressure block, passes through the through hole, and is fixedly connected to the abutment block. A spring is sleeved on the outside of the pressure rod. This structural design allows maintenance personnel to easily disassemble and repair the blades inside the high-efficiency three-separation vortex classifier.

[0004] However, during the production of cement abrasives, metal impurities such as iron blocks may be mixed in. However, in the process of using the aforementioned patent, the raw materials introduced through the feed pipe were not screened beforehand, which caused iron blocks that are easily mixed in with the material to enter the classification area of ​​the air classifier. These hard impurities may jam the screen and other working components inside the air classifier, causing the equipment to malfunction or even cause equipment failure or damage, thereby interfering with the normal classification process of the material, reducing the classification efficiency, and thus affecting the use of the air classifier. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage separation classifier for mills to solve the problems mentioned in the background art.

[0006] To achieve the above object, the present utility model provides the following technical solutions: a powder separator for a multi-stage separation mill, comprising an upper housing, a middle cylinder and an ash hopper. The middle of the bottom end of the upper housing is connected to the middle cylinder, and the bottom end of the outer wall of the middle cylinder is welded with an ash hopper. The top end of the outer wall of the upper housing is connected to a top cover, and the middle of the top end of the top cover is equipped with a servo motor. A rotating shaft is arranged below the servo motor. The bottom end of the outer wall of the rotating shaft is sleeved with blades. The middle of the top end of the ash hopper is connected to a powder selection chamber. One side of the outer wall of the middle cylinder is butted with an air inlet pipe. Both sides of the bottom end of the upper housing are butted with air cylinders. A filtering mechanism is arranged in the middle of the upper housing, and the filtering mechanism includes a transmission shaft, a limiting seat, an extension plate, a limiting rod, a filter mesh plate, a spring, a roller, a fixing block, a support ring, a fixing ring, a limiting pin and a threaded pin. The output end of the servo motor is butted with the transmission shaft, and the bottom end of the transmission shaft is butted with the limiting seat. The bottom end of the outer wall of the limiting seat is welded to the top end of the rotating shaft. The middle of the outer wall of the rotating shaft is welded with an extension plate, and the top end of the outer wall of the extension plate is connected to a limiting rod. The filtering mesh plate is connected to the outer wall of the limiting rod. The middle of the outer wall of the filtering mesh plate is connected to a spring.

[0007] Preferably, the top end of the spring is connected to the limiting seat. An elastic telescopic mechanism is formed among the limiting seat, the extension plate, the limiting rod, the filter mesh plate, the spring and the rotating shaft. The limiting rods are distributed in a "cross" shape.

[0008] Preferably, the bottom end of the transmission shaft is in a "cross" shape structure. A fixing groove is opened inside the limiting seat, and the bottom end of the transmission shaft extends into it.

[0009] Preferably, a support ring is welded in the middle of the inner wall of the upper housing, and a fixing block is welded to the top end of the support ring. One side of the outer wall of the fixing block is a slope, and the other side of the outer wall of the fixing block is a vertical plane.

[0010] Preferably, the outer side of the bottom end of the filter mesh plate is connected to a roller. The rollers and the fixing blocks are both distributed in a "hexagon" shape. The support ring is in an "O" shape structure.

[0011] Preferably, a fixing ring is welded to the top end of the outer wall of the upper housing, and a limiting pin is welded to the top end of the fixing ring. A threaded pin is connected to the inside of the top cover by threading.

[0012] Preferably, a limiting hole is opened inside the top cover, and the limiting pin extends into it. A threaded hole is opened inside the fixing ring, and the threaded pin extends into it. The limiting pin and the threaded pin are distributed in a "rice" shape.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: When the multi-stage separation mill classifier is used, the filtration mechanism filters out impurities such as iron blocks from the material, preventing hard impurities such as iron blocks from entering the screening area of ​​the classifier, thereby preventing hard impurities from causing equipment failure or damage; and the spring causes the filter screen to vibrate repeatedly, thereby shaking out the hard impurities blocked by the filter screen, preventing them from clogging the filter screen and reducing the filtration effect. Moreover, the filter screen can be cleaned during the operation of the classifier, thus facilitating the filtration of hard impurities and preventing the filter components from clogging when the multi-stage separation mill classifier is used. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of this utility model;

[0016] Figure 3 This is a three-dimensional cross-sectional view of the upper shell of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the filtration mechanism of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the transmission shaft and the limiting seat of this utility model in their separated state;

[0019] Figure 6 This is a three-dimensional structural diagram of the extension disc of this utility model viewed from below.

[0020] In the diagram: 1. Upper shell; 2. Middle cylinder; 3. Ash hopper; 4. Top cover; 5. Servo motor; 6. Rotating shaft; 7. Blade; 8. Powder separator; 9. Air inlet pipe; 10. Air duct; 11. Feed pipe; 12. Filtering mechanism; 1201. Drive shaft; 1202. Limiting seat; 1203. Extension disc; 1204. Limiting rod; 1205. Filter screen; 1206. Spring; 1207. Roller; 1208. Fixing block; 1209. Support ring; 1210. Fixing ring; 1211. Limiting pin; 1212. Threaded pin. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-6 , the utility model provides a technical solution: a powder separator for a multi-stage separation mill, which includes an upper shell 1, a middle cylinder 2 and an ash hopper 3. The middle of the bottom end of the upper shell 1 is connected to the middle cylinder 2, and the bottom end of the outer wall of the middle cylinder 2 is welded with the ash hopper 3. The top of the outer wall of the upper shell 1 is connected to a top cover 4, and a servo motor 5 is installed in the middle of the top of the top cover 4. And a rotating shaft 6 is arranged below the servo motor 5. A blade 7 is sleeved on the bottom end of the outer wall of the rotating shaft 6. The middle of the top of the ash hopper 3 is connected to a powder selection bin 8. An air inlet pipe 9 is butted on one side of the outer wall of the middle cylinder 2. Air ducts 10 are butted on both sides of the bottom end of the upper shell 1. A filtering mechanism 12 is arranged in the middle of the upper shell 1. The filtering mechanism 12 includes a transmission shaft 1201, a limit seat 1202, an extension disk 1203, a limit rod 1204, a filter screen plate 1205, a spring 1206, a roller 1207, a fixing block 1208, a support ring 1209, a fixing ring 1210, a limit pin 1211 and a threaded pin 1212. The output end of the servo motor 5 is butted with the transmission shaft 1201, and the bottom end of the transmission shaft 1201 is butted with the limit seat 1202. And the bottom end of the outer wall of the limit seat 1202 is welded to the top of the rotating shaft 6. An extension disk 1203 is welded in the middle of the outer wall of the rotating shaft 6. And a limit rod 1204 is connected to the top of the outer wall of the extension disk 1203. And a filter screen plate 1205 is connected to the outer wall of the limit rod 1204 during sliding. A spring 1206 is connected to the middle of the outer wall of the filter screen plate 1205; the top of the spring 1206 is connected to the limit seat 1202. An elastic telescopic mechanism is formed among the limit seat 1202, the extension disk 1203, the limit rod 1204, the filter screen plate 1205, the spring 1206 and the rotating shaft 6. The limit rods 1204 are distributed in a "cross" shape; the bottom end of the transmission shaft 1201 is in a "cross" shape structure. A fixing groove is opened inside the limit seat 1202, and the bottom end of the transmission shaft 1201 extends into it; A support ring 1209 is welded in the middle of the inner wall of the upper shell 1. And a fixing block 1208 is welded to the top of the support ring 1209. One side of the outer wall of the fixing block 1208 is a slope, and the other side of the outer wall of the fixing block 1208 is a vertical plane; A roller 1207 is connected to the outside of the bottom end of the filter screen plate 1205. And both the roller 1207 and the fixing block 1208 are distributed in a "hexagon" shape. The support ring 1209 is in an "O" shape structure; A fixing ring 1210 is welded to the top of the outer wall of the upper shell 1. And a limit pin 1211 is welded to the top of the fixing ring 1210. A threaded pin 1212 is connected to the inside of the top cover 4 by thread; A limit hole is opened inside the top cover 4, and the limit pin 1211 extends into it. A threaded hole is opened inside the fixing ring 1210, and the threaded pin 1212 extends into it. The limit pin 1211 and the threaded pin \1212 are distributed in a "rice" shape; A sliding connection is between the rotating shaft 6 and the filter screen plate 1205. The inner wall of the spring 1206 is connected to the rotating shaft 6.

[0023] In practical implementation, during the operation of the multi-stage separation mill classifier, the material is first introduced into the upper housing 1 through the feed pipe 11. Then, the material is screened by the filter screen 1205 to remove impurities such as iron blocks, preventing hard impurities such as iron blocks from entering the screening area of ​​the classifier and thus preventing equipment failure or damage. Then, the servo motor 5 is started to drive the drive shaft 1201 to rotate. Since the drive shaft 1201 is connected to the limit seat 1202 at this time, the rotation of the drive shaft 1201 will drive the limit seat 1202 to rotate. Then, the rotation of the limit seat 1202 will drive the rotating shaft 6 to rotate. Since the rotating shaft 6 is connected to the extension disk 1203, the rotation of the rotating shaft 6 will drive the extension disk 1203 to rotate together. Then, the rotation of the extension disk 1203 will drive the limit rod 1204 to rotate together. Since the limit rod 1204 is connected to the filter screen 1205, the rotation of the limit rod 1204 will drive the filter screen 1205 to rotate together.

[0024] Because the filter screen 1205 is connected to the roller 1207, the rotation of the filter screen 1205 will drive the roller 1207 to rotate together. Then, the roller 1207 moves along the fixed block 1208 at the top of the support ring 1209. The roller 1207 first moves along the inclined surface of the fixed block 1208, thereby generating an upward thrust on the filter screen 1205, causing the filter screen 1205 to move upward along the limiting rod 1204 and the rotating shaft 6. The upward movement of the filter screen 1205 will compress the spring 1206, causing it to deform. Then, when the roller 1207 moves to the vertical plane of the fixed block 1208, the spring 1206 will reset and generate a downward elastic force, which will cause the filter screen 1205 to vibrate repeatedly, thereby shaking out the hard impurities blocked by the filter screen 1205 and preventing them from clogging the filter screen 1205 and causing a decrease in filtration effect. Then, the filter screen 1205 can be cleaned during the operation of the air classifier. Thus, when the air classifier is used for multi-stage separation mills, it plays a role in facilitating the filtration of hard impurities and preventing the filter components from clogging.

[0025] The threaded pin 1212 can be rotated upwards until it is disengaged from the retaining ring 1210, thereby removing the limit on the top cover 4. Then, the top cover 4 is moved upwards to disengage from the limit pin 1211, allowing the top cover 4 to be removed from the upper housing 1, revealing the filter screen 1205. The hard impurities blocked by the filter screen 1205 can then be removed from the upper housing 1.

[0026] In summary, when using this multi-stage separation mill classifier, the material is first introduced into the upper shell 1 through the feed pipe 11. Then, the servo motor 5 is started to drive the rotating shaft 6 to rotate. The rotation of the rotating shaft 6 drives the blades 7 to rotate. When the material passes through the upper shell 1 and reaches the middle cylinder 2, it is initially screened by the rotating blades 7. After that, the material reaches the classifier bin 8, where it is screened again. At this time, the air inlet pipe 9 introduces airflow into the classifier bin 8 to assist in screening the raw materials. Finally, the screened material is discharged through the ash collection hopper 3. During this process, the air duct 10 assists the upper shell 1 in screening the material. This is existing technology and will not be elaborated upon here. The filter mechanism 12 filters out impurities such as iron blocks from the material, preventing hard impurities such as iron blocks from entering the screening area of ​​the air classifier, thereby preventing hard impurities from causing equipment failure or damage. The spring 1206 causes the filter screen 1205 to vibrate repeatedly, thereby shaking out the hard impurities blocked by the filter screen 1205, preventing them from clogging the filter screen 1205 and reducing the filtration effect. Thus, the filter screen 1205 can be cleaned during the operation of the air classifier. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage separation classifier for a mill, comprising an upper shell (1), a middle cylinder (2), and a dust collection hopper (3), wherein the middle cylinder (2) is connected to the middle of the bottom end of the upper shell (1), and the dust collection hopper (3) is welded to the bottom end of the outer wall of the middle cylinder (2); a top cover (4) is connected to the top end of the outer wall of the upper shell (1), and a servo motor (5) is installed at the middle of the top end of the top cover (4), and a rotating shaft (6) is provided below the servo motor (5); blades (7) are sleeved at the bottom end of the outer wall of the rotating shaft (6); a classifier bin (8) is connected to the middle of the top end of the dust collection hopper (3); an air inlet pipe (9) is connected to one side of the outer wall of the middle cylinder (2); and air ducts (10) are connected to both sides of the bottom end of the upper shell (1), characterized in that: A filter mechanism (12) is provided in the middle of the upper housing (1), and the filter mechanism (12) includes a drive shaft (1201), a limiting seat (1202), an extension plate (1203), a limiting rod (1204), a filter screen (1205), a spring (1206), a roller (1207), a fixing block (1208), a support ring (1209), a fixing ring (1210), a limiting pin (1211), and a threaded pin (1212). The output end of the servo motor (5) is connected to a drive shaft (1201), a limiting seat (1202), an extension plate (1203), a limiting rod (1204), a filter screen (1205), a spring (1206), a roller (1207), a fixing block (1208), a support ring (1209), a fixing ring (1210), a limiting pin (1211), and a threaded pin (1212). A drive shaft (1201) is connected to a limiting seat (1202) at its bottom end. The bottom end of the outer wall of the limiting seat (1202) is welded to the top end of the rotating shaft (6). An extension disc (1203) is welded to the middle of the outer wall of the rotating shaft (6). A limiting rod (1204) is connected to the top end of the outer wall of the extension disc (1203). A filter screen plate (1205) is connected to the outer wall of the limiting rod (1204). A spring (1206) is connected to the middle of the outer wall of the filter screen plate (1205).

2. A classifier for a multi-stage separation mill according to claim 1, characterized in that: The top of the spring (1206) is connected to the limiting seat (1202). The limiting seat (1202), the extension plate (1203), the limiting rod (1204), the filter plate (1205), the spring (1206) and the rotating shaft (6) form an elastic telescopic mechanism. The limiting rod (1204) is distributed in a "+" shape.

3. The multi-stage separation classifier for a mill according to claim 2, characterized in that: The bottom end of the drive shaft (1201) has a cross-shaped structure, and the limiting seat (1202) has a fixing groove inside, into which the bottom end of the drive shaft (1201) extends.

4. A classifier for a multi-stage separation mill according to claim 3, characterized in that: A support ring (1209) is welded to the middle of the inner wall of the upper shell (1), and a fixing block (1208) is welded to the top of the support ring (1209). One side of the outer wall of the fixing block (1208) is an inclined surface, and the other side of the outer wall of the fixing block (1208) is a vertical plane.

5. A classifier for a multi-stage separation mill according to claim 4, characterized in that: The filter screen (1205) is connected to a roller (1207) on the outer side of its bottom end. Both the roller (1207) and the fixing block (1208) are hexagonal. The support ring (1209) has an O-shaped structure.

6. A classifier for use in a multi-stage separation mill according to claim 1, characterized in that: The upper shell (1) has a fixing ring (1210) welded to the top of its outer wall, and a limit pin (1211) is welded to the top of the fixing ring (1210). The top cover (4) has a threaded pin (1212) threaded inside.

7. A classifier for a multi-stage separation mill according to claim 6, characterized in that: The top cover (4) is internally provided with a limiting hole into which the limiting pin (1211) extends, and the fixing ring (1210) is internally provided with a threaded hole into which the threaded pin (1212) extends. The limiting pin (1211) and the threaded pin (1212) are distributed in a "rice" shape.

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