Jet mill and energy-saving crushing method for ore

Abstract

The invention relates to the technical field of airflow crushers, and discloses an airflow mill and an energy-saving crushing method for ores, the airflow mill comprises a mounting rack, a feeding cylinder and an airflow crushing system are arranged on the mounting rack, and a spiral feeding mechanism is arranged at the bottom of the feeding cylinder; the airflow crushing system is used for crushing materials and collecting the crushed materials, the spiral feeding mechanism is used for feeding the materials in the feeding cylinder into the airflow crushing system, a stirring shaft and a scraper blade are arranged in the feeding cylinder, a sealing cover is arranged on the feeding cylinder, and the stirring shaft and the scraper blade are arranged in the feeding cylinder. A cleaning mechanism is arranged on the sealing cover; and an air supply mechanism is further arranged on the mounting frame. The inner walls of the stirring shaft, the scraping plate and the feeding cylinder can be cleaned, the problem that dust overflows when the stirring shaft is separated from the feeding cylinder is avoided, and the connection stability and compactness between the corrugated pipe and the air supply pipe can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air classifiers, and particularly to an air mill and an energy-saving pulverization method for ores. Background Art

[0002] An air classifier is a device that uses the energy of high-speed air flow or superheated steam to make particles collide, rub against each other, or impact and shear with equipment components in a supersonic air flow to achieve ultrafine pulverization. Its core advantages include high-precision pulverization, low-temperature pulverization, and pollution-free environment. It is widely used in the processing of superhard materials (such as diamond, silicon carbide) and high-purity materials (such as medicine, ceramic pigments); Ore powder is the product obtained by pulverizing the mined ore through crushing and processing. It is the first and very important step in ore processing and smelting, etc. It has various classifications and applications. In order to meet the subsequent processing requirements, the existing ore powder often needs to use an air classifier to further reduce the particle size of the ore powder after pulverization.

[0003] Chinese Patent CN202420921662.1 discloses an air classifier feeding structure for preventing pollution, including a feeding cylinder. One side of the bottom end of the feeding cylinder is movably hinged with a support leg, and the other side of the bottom end of the feeding cylinder is fixedly connected with a fixed slideway. An adjusting slider is installed outside the fixed slideway, and the bottom end of the adjusting slider is movably hinged with a telescopic leg. One side of the feeding cylinder is provided with an installation cover, and one side of the installation cover is provided with a driving motor. This air classifier feeding structure for preventing pollution drives the stirring rod to rotate through a stirring motor to avoid material blockage. The material enters the inside of the feeding cylinder from the feeding tank and is then conveyed from the feeding cylinder into the inside of the air classifier. The protective cover can maintain the feeding sealing performance and avoid pollution during the feeding process. The protective cover can be removed from the feeding tank for cleaning. This structure realizes the function of enhancing protection and avoiding pollution and solves the problem of poor protection effect.

[0004] However, the above technical solution still has certain defects in use. For example, although the stirring shaft can stir the materials in the feeding cylinder to avoid blockage problems, the stirring shaft cannot clean the powdered materials adhered to the inner wall of the feeding cylinder, resulting in material waste. And when disassembling the stirring shaft, since there is a lot of powdered material adhered to the surface of the stirring shaft and the inner wall of the feeding cylinder, when the user opens the feeding cylinder, there will be a phenomenon of dust overflow. The dust overflow will not only affect the health of the user, but also pollute the surrounding environment and cause material waste. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides an air flow mill and an energy-saving crushing method for ore, which has the advantages of being able to clean the powdered material attached to the inner wall of the feed barrel while also being able to remove the powdered material attached to the surface of the stirring shaft, thereby solving the above-mentioned problems.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an air flow mill, comprising a mounting frame, a feed barrel and an air flow pulverizing system are arranged on the mounting frame, a spiral feeding mechanism is arranged at the bottom of the feed barrel, the air flow pulverizing system is used to pulverize materials and collect the pulverized materials, the spiral feeding mechanism is used to feed the materials in the feed barrel into the air flow pulverizing system, a stirring shaft and a scraper are arranged in the feed barrel, the stirring shaft is used to stir the materials in the feed barrel, the scraper is used to scrape the inner wall of the feed barrel, a sealing cover is arranged on the feed barrel, and a cleaning mechanism is arranged on the sealing cover; The cleaning mechanism includes an inclined nozzle, a vertical nozzle, a driving motor, a convex block and a bellows, wherein the inclined nozzle is used to blow air to clean the surface of the scraper, the vertical nozzle is used to blow air to clean the surface of the stirring shaft, and the convex block is used to drive the bellows to retract; The mounting frame is also provided with an air supply mechanism, which includes an air supply pipe and a locking assembly, wherein the air supply pipe is used to supply compressed air to the inclined nozzle and the vertical nozzle, and the locking assembly is used to fix the bellows and the air supply pipe; The driving motor includes two states of low-speed operation and medium-speed operation. When the driving motor is running at low speed, it can drive the stirring shaft to stir the material in the feed barrel. When the stirring shaft is running, it synchronously drives the scraper to scrape the inner wall of the feed barrel. When the driving motor is running at medium speed, it can drive the stirring shaft and the scraper to run while driving the bump to move. The movement of the bump drives the bellows to connect to the air supply pipe.

[0007] Preferably, a fixing frame is fixedly connected to the bottom of the driving motor, the fixing frame is fixedly connected to the sealing cover, an active bevel gear is fixedly connected to the output shaft of the driving motor, a driven bevel gear is meshed on the outer side of the active bevel gear, an air pipe is fixedly connected to the inner side of the driven bevel gear, one end of the air pipe away from the driven bevel gear passes through the sealing cover and is fixedly connected to an air distribution plate, the air pipe is rotatably connected to the sealing cover, and the stirring shaft is fixedly connected to the bottom surface of the air distribution plate.

[0008] Preferably, the inclined nozzles are distributed on both sides of the gas distribution plate, the vertical nozzles are distributed circumferentially on the bottom surface of the gas distribution plate, the inclined nozzles and the vertical nozzles are both connected to the gas distribution plate, and the inclined nozzles are installed on the scraper.

[0009] Preferably, a rotary joint is provided at one end of the corrugated pipe. The rotary joint is installed on the gas transmission pipe. The corrugated pipe is connected to the gas transmission pipe through the rotary joint. An air-permeable plate is fixedly connected to the inner side of the end of the corrugated pipe away from the rotary joint. A guide rod is fixedly connected to the outer side of the air-permeable plate. A support plate is fixedly connected to the end of the gas transmission pipe away from the rotary joint. A limiting rod is slidably connected to the bottom of the support plate. Symmetrically distributed grooves are formed in the sealing cover. The limiting rod is fixedly connected in the grooves. A return spring is fixedly connected to the outer side of the support plate. One end of the return spring away from the support plate is fixedly connected to the inner side of the groove.

[0010] Preferably, a slider is fixedly connected to the bottom of the convex block. A fixing rod is slidably connected to the inner side of the slider. A disc is fixedly connected to the outer side of the fixing rod. A number of circumferentially distributed rectangular holes are formed in the disc. The fixing rod is fixedly connected to the inside of the rectangular holes. A connecting spring is fixedly connected to the outer side of the slider. One end of the connecting spring away from the slider is fixedly connected to the inside of the rectangular holes. The disc is fixedly connected to the gas transmission pipe.

[0011] Preferably, an air inlet structure is connected to the outer side of the air delivery pipe. The air inlet structure is installed on the mounting frame. An inner groove is formed at the end of the air delivery pipe away from the air inlet structure. A guide hole is formed on one side of the inner groove. A plug plate is inserted into the inner side of the inner groove. A sliding rod is fixedly connected to the outer side of the plug plate. The sliding rods are circumferentially distributed on the plug plate. A blocking spring is fixedly connected to the sliding rod. One end of the blocking spring away from the sliding rod is fixedly connected to the air delivery pipe. When the guide rod moves, it can pass through the guide hole and contact the plug plate.

[0012] Preferably, the locking assembly includes a rack and a fixed gear. The rack is fixedly connected to the support plate. A bidirectional screw is fixedly connected to the inner side of the fixed gear. The outer end of the bidirectional screw is rotatably connected to a fixing plate. The fixing plate is fixedly connected to the air delivery pipe. An arc-shaped clamping plate is threadedly connected to the bidirectional screw. A cross bar is slidably connected to the side of the arc-shaped clamping plate away from the bidirectional screw. The cross bar is fixedly connected to the fixing plate. After the gas transmission pipe and the air delivery pipe are inserted into each other, the arc-shaped clamping plate can clamp and fix the gas transmission pipe and the air delivery pipe.

[0013] Preferably, a fixed cylinder is fixedly connected to the inner side of the scraper. An installation spring is fixedly connected to the inner side of the fixed cylinder. A connecting rod is fixedly connected to the end of the installation spring away from the fixed cylinder. The connecting rod is fixedly connected to the stirring shaft at the end away from the installation spring.

[0014] Preferably, a plurality of mounting bolts are circumferentially arranged on the sealing cover, a locking block is threadedly connected to the mounting bolts, and a plurality of arc-shaped holes are circumferentially formed in the feed cylinder. The mounting bolts, the locking block, and the arc-shaped holes are used to mount the sealing cover and the feed cylinder.

[0015] An energy-saving crushing method for ores uses the above-mentioned jet mill.

[0016] Compared with the prior art, the present invention provides a jet mill and an energy-saving crushing method for ores, having the following beneficial effects: 1. In the present invention, when the stirring shaft needs to be cleaned, the driving motor is controlled to operate at medium speed. At this time, the stirring shaft drives the scraper to scrape the ore powder adhered to the inner wall of the feed cylinder. At the same time, after the driving motor operates at medium speed, the driving convex block moves towards the air supply pipe. The movement of the convex block drives the corrugated pipe to stretch and move towards the air supply pipe following the convex block. After that, the convex block drives the corrugated pipe to be inserted into the air supply pipe. At this time, the compressed air in the air supply pipe enters the corrugated pipe, and then enters the inclined nozzle and the vertical nozzle through the corrugated pipe. Then, the compressed air is ejected through the inclined nozzle and the vertical nozzle. The compressed air ejected through the inclined nozzle blows the surface of the scraper for cleaning, thereby cleaning the ore powder adhered to the surface of the scraper. The compressed air ejected through the vertical nozzle cleans the ore powder adhered to the surface of the stirring shaft, thus avoiding the problem that when the stirring shaft is separated from the feed cylinder, a large amount of ore powder adheres to the surface of the stirring shaft and the inner wall of the feed cylinder, so that when the feed cylinder is opened, a large amount of soot will be generated, which will harm the health of the staff and the environment and cause waste of ore powder at the same time.

[0017] 2. In the present invention, during the process of the convex block driving the corrugated pipe to be inserted into the air supply pipe, the locking component gradually operates. After the corrugated pipe is inserted into the air supply pipe, the locking component fixes the corrugated pipe and the air supply pipe, thereby improving the connection stability and tightness between the corrugated pipe and the air supply pipe, and avoiding the problem of gas leakage after the corrugated pipe is connected to the air supply pipe.

[0018] 3. In the present invention, when crushing the ore powder, the driving motor drives the stirring shaft to rotate, so that the stirring shaft can disperse the agglomerated ore powder in the feed cylinder, thereby improving the subsequent crushing effect of the ore powder. And during the stirring process of the stirring shaft, the scraper is synchronously driven to scrape the inner wall of the feed cylinder, thereby avoiding the problem that the ore powder will adhere to the inner wall of the feed cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a first perspective schematic diagram of the overall structure of the present invention; Figure 2 It is a second perspective schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic diagram of the mounting frame and the feed cylinder structure of the present invention; Figure 4 Side sectional view of the mounting bracket and the feed cylinder structure of the present invention; Figure 5 Schematic diagram of the feed cylinder structure of the present invention; Figure 6 First perspective side sectional view of the feed cylinder structure of the present invention; Figure 7 is Figure 6 Enlarged schematic view of the structure at A in Figure 8 is Figure 6 Enlarged schematic view of the structure at B in Figure 9 is Figure 6 Enlarged schematic view of the structure at C in Figure 10 Second perspective side sectional view of the feed cylinder structure of the present invention; Figure 11 Third perspective side sectional view of the feed cylinder structure of the present invention; Figure 12 Fourth perspective side sectional view of the feed cylinder structure of the present invention.

[0020] In the figure: 1, mounting bracket; 2, feed cylinder; 21, stirring shaft; 22, scraper; 221, fixed cylinder; 222, mounting spring; 223, connecting rod; 3, sealing cover; 4, cleaning mechanism; 41, inclined spray head; 42, vertical spray head; 43, driving motor; 431, fixed frame; 432, driving bevel gear; 433, driven bevel gear; 434, gas transmission pipe; 435, air distribution plate; 44, convex block; 441, slider; 442, fixed rod; 443, disc; 444, connecting spring; 45, bellows; 451, rotary joint; 452, air permeable plate; 453, guide rod; 454, limiting rod; 456, support plate; 457, reset spring; 5, air supply mechanism; 51, air supply pipe; 511, air intake structure; 512, inner groove; 513, guide hole; 514, plug plate; 515, slide rod; 516, blocking spring; 52, locking assembly; 521, rack; 522, fixed gear; 523, bidirectional screw; 524, fixed plate; 525, arc-shaped clamping plate; 526, cross bar; 6, screw feeding mechanism; 7, air flow crushing system. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes a jet mill and an energy-saving pulverization method for ores.

[0023] Example 1: Please refer to Figures 1 - 12 , a jet mill, including a mounting frame 1, on which a feed cylinder 2 and a jet pulverization system 7 are provided. At the bottom of the feed cylinder 2, a screw feeding mechanism 6 is provided. The jet pulverization system 7 is used to pulverize the material and collect the pulverized material. The screw feeding mechanism 6 is used to feed the material in the feed cylinder 2 into the jet pulverization system 7. A stirring shaft 21 and a scraper 22 are provided in the feed cylinder 2. The stirring shaft 21 is used to stir the material in the feed cylinder 2, and the scraper 22 is used to scrape the inner wall of the feed cylinder 2. A sealing cover 3 is provided on the feed cylinder 2. An inlet is provided on the sealing cover 3, and a cleaning mechanism 4 is provided on the sealing cover 3; The cleaning mechanism 4 includes an inclined nozzle 41, a vertical nozzle 42, a drive motor 43, a convex block 44 and a corrugated pipe 45. The inclined nozzle 41 is used to blow and clean the surface of the scraper 22, and the vertical nozzle 42 is used to blow and clean the surface of the stirring shaft 21. The convex block 44 is used to drive the corrugated pipe 45 to expand and contract; A gas supply mechanism 5 is also provided on the mounting frame 1. The gas supply mechanism 5 includes a gas supply pipe 51 and a locking component 52. The gas supply pipe 51 is used to supply compressed air to the inclined nozzle 41 and the vertical nozzle 42, and the locking component 52 is used to fix the corrugated pipe 45 and the gas supply pipe 51; The drive motor 43 has two states: low-speed operation and medium-speed operation. When the drive motor 43 operates at low speed, it can drive the stirring shaft 21 to stir the material in the feed cylinder 2. When the stirring shaft 21 rotates, it synchronously drives the scraper 22 to scrape the inner wall of the feed cylinder 2. When the drive motor 43 operates at medium speed, it can drive the stirring shaft 21 and the scraper 22 to rotate, and at the same time, it can also drive the convex block 44 to move. The movement of the convex block 44 drives the corrugated pipe 45 to be connected to the gas supply pipe 51.

[0024] In use, materials are poured into the feed cylinder 2 through the feed inlet. Then, the driving motor 43 is controlled to run at a low speed. The low-speed operation of the driving motor 43 drives the stirring shaft 21 to rotate. The rotation of the stirring shaft 21 drives the scraper 22 to rotate synchronously. The rotation of the stirring shaft 21 stirs the mineral powder in the feed cylinder 2 to avoid problems such as blockage and agglomeration. The rotation of the scraper 22 cleans the mineral powder adhering to the inner wall of the feed cylinder 2. Then, the screw feeding mechanism 6 conveys the mineral powder into the air flow pulverizing system 7. After that, the air flow pulverizing system 7 further pulverizes and collects the mineral powder. When it is necessary to clean the stirring shaft 21, the driving motor 43 is controlled to run at a medium speed. At this time, the driving motor 43 drives the convex block 44 to move towards the air supply pipe 51. The movement of the convex block 44 drives the corrugated pipe 45 to stretch and move towards the air supply pipe 51 following the convex block 44. Then, the convex block 44 drives the corrugated pipe 45 to be inserted into the air supply pipe 51. At this time, the locking component 52 fixes the corrugated pipe 45 and the air supply pipe 51, thereby improving the connection tightness between the corrugated pipe 45 and the air supply pipe 51. Then, the compressed air in the air supply pipe 51 enters the corrugated pipe 45, and then enters the inclined nozzle 41 and the vertical nozzle 42 through the corrugated pipe 45. Then, the compressed air is ejected through the inclined nozzle 41 and the vertical nozzle 42. The compressed air ejected through the inclined nozzle 41 blows and cleans the surface of the scraper 22, thereby cleaning the mineral powder adhering to the surface of the scraper 22. The compressed air ejected through the vertical nozzle 42 cleans the mineral powder adhering to the surface of the stirring shaft 21. The cleaned mineral powder enters the air flow pulverizing system 7 again through the screw feeding mechanism 6 for pulverizing and collecting, thereby avoiding the problem that when the stirring shaft 21 is separated from the feed cylinder 2, due to a large amount of mineral powder adhering to the surface of the stirring shaft 21 and the inner wall of the feed cylinder 2, when the feed cylinder 2 is opened, dust will fly everywhere, which not only endangers the health of the staff and the environment, but also causes waste of mineral powder.

[0025] Embodiment 2: Refer to Figures 1 - 12, different from the first embodiment above, a fixing frame 431 is fixedly connected to the bottom of the driving motor 43. The fixing frame 431 is fixedly connected to the sealing cover 3. A driving bevel gear 432 is fixedly connected to the output shaft of the driving motor 43. A driven bevel gear 433 is engaged with the outside of the driving bevel gear 432. An air delivery pipe 434 is fixedly connected to the inside of the driven bevel gear 433. One end of the air delivery pipe 434 away from the driven bevel gear 433 passes through the sealing cover 3 and is fixedly connected to a gas distribution plate 435. The air delivery pipe 434 is rotatably connected to the sealing cover 3. The stirring shaft 21 is fixedly connected to the bottom surface of the gas distribution plate 435. The inclined spray nozzles 41 are distributed on both sides of the gas distribution plate 435. The vertical spray nozzles 42 are circumferentially distributed on the bottom surface of the gas distribution plate 435. Both the inclined spray nozzles 41 and the vertical spray nozzles 42 are communicated with the gas distribution plate 435. The inclined spray nozzles 41 are installed on the scraping plate 22. One end of the corrugated pipe 45 is provided with a rotary joint 451. The rotary joint 451 is installed on the air delivery pipe 434. The corrugated pipe 45 is connected to the air delivery pipe 434 through the rotary joint 451. One end of the corrugated pipe 45 away from the rotary joint 451 is fixedly connected to a ventilation plate 452 on the inner side. A guide rod 453 is fixedly connected to the outside of the ventilation plate 452. One end of the air delivery pipe 434 away from the rotary joint 451 is fixedly connected to a support plate 456. A limiting rod 454 is slidably connected to the bottom of the support plate 456. Symmetrically distributed grooves are formed in the sealing cover 3. The limiting rod 454 is fixedly connected in the grooves. A return spring 457 is fixedly connected to the outside of the support plate 456. One end of the return spring 457 away from the support plate 456 is fixedly connected to the inner side of the groove. A slider 441 is fixedly connected to the bottom of the convex block 44. A fixing rod 442 is slidably connected to the inside of the slider 441. A disc 443 is fixedly connected to the outside of the fixing rod 442. A number of circumferentially distributed rectangular holes are formed in the disc 443. The fixing rod 442 is fixedly connected to the inside of the rectangular holes. A connecting spring 444 is fixedly connected to the outside of the slider 441. One end of the connecting spring 444 away from the slider 441 is fixedly connected to the inside of the rectangular holes. The disc 443 is fixedly connected to the air delivery pipe 434. An air intake structure 511 is connected to the outside of the air delivery pipe 51. The air intake structure 511 is installed on the mounting frame 1. An inner groove 512 is formed at one end of the air delivery pipe 51 away from the air intake structure 511. A guide hole 513 is formed on one side of the inner groove 512. A plug plate 514 is inserted into the inner side of the inner groove 512. A slide rod 515 is fixedly connected to the outside of the plug plate 514. The slide rods 515 are circumferentially distributed on the plug plate 514. A blocking spring 516 is fixedly connected to the slide rod 515. One end of the blocking spring 516 away from the slide rod 515 is fixedly connected to the air delivery pipe 51. When the guide rod 453 moves, it can pass through the guide hole 513 and contact the plug plate 514; When it is necessary to clean the stirring shaft 21 and the scraper 22, control the driving motor 43 to operate at medium speed. The rotation of the driving motor 43 drives the rotation of the driving bevel gear 432. The rotation of the driving bevel gear 432 drives the rotation of the driven bevel gear 433. The rotation of the driven bevel gear 433 drives the rotation of the air delivery pipe 434. The rotation of the air delivery pipe 434 drives the rotation of the disc 443. Since the driving motor 43 is in the state of medium-speed operation at this time, the centrifugal force received by the convex block 44 is greater than the elastic force of the connecting spring 444. At this time, the convex block 44 gradually moves outward along the fixed rod 442 towards the outside of the disc 443. During the outward expansion of the convex block 44, it gradually contacts the support plate 456 and gradually drives the support plate 456 to move along the limit rod 454 towards the air supply pipe 51. The movement of the support plate 456 stretches the corrugated pipe 45, thereby gradually unfolding the corrugated pipe 45. The movement of the corrugated pipe 45 drives the movement of the air-permeable plate 452 and the guide rod 453. Then, the guide rod 453 is inserted into the guide hole 513 and contacts the plug plate 514. As the corrugated pipe 45 continues to unfold, the guide rod 453 drives the plug plate 514 to move away from the corrugated pipe 45. After the plug plate 514 moves out of the inner groove 512, it drives the movement of the sliding rod 515. The movement of the sliding rod 515 compresses the blocking spring 516. After the corrugated pipe 45 is completely inserted into the air supply pipe 51, the compressed air in the air supply pipe 51 enters the corrugated pipe 45 through the gap between the plug plate 514 and the air supply pipe 51. Then, the compressed air enters the corrugated pipe 45 and the air delivery pipe 434 through the air-permeable plate 452, and then enters the air distribution disc 435. After being dispersed by the air distribution disc 435, it enters the inclined spray head 41 and the vertical spray head 42. Then, the compressed air sprayed by the inclined spray head 41 blows and cleans the surface of the scraper 22, thereby cleaning the ore powder adhering to the surface of the scraper 22. And the compressed air sprayed by the vertical spray head 42 cleans the ore powder adhering to the surface of the stirring shaft 21, so as to achieve the effect of cleaning the scraper 22, the stirring shaft 21 and the feeding cylinder 2, thus avoiding the problem of dust overflow when the stirring shaft 21 is disassembled later.

[0026] Embodiment 3, refer to Figures 1 - 12 , different from the above Embodiment 2, the locking assembly 52 includes a rack 521 and a fixed gear 522. The rack 521 is fixedly connected to the support plate 456. The inner side of the fixed gear 522 is fixedly connected with a bidirectional screw rod 523. The outer end of the bidirectional screw rod 523 is rotatably connected to a fixed plate 524. The fixed plate 524 is fixedly connected to the air supply pipe 51. An arc-shaped clamping plate 525 is threadedly connected to the bidirectional screw rod 523. The side of the arc-shaped clamping plate 525 away from the bidirectional screw rod 523 is slidably connected to a cross bar 526. The cross bar 526 is fixedly connected to the fixed plate 524. After the air delivery pipe 434 is inserted into the air supply pipe 51, the arc-shaped clamping plate 525 can clamp and fix the air delivery pipe 434 and the air supply pipe 51; When the bump 44 drives the support plate 456 to move towards the air supply pipe 51, the support plate 456 drives the rack 521 to move. After the rack 521 moves, it contacts the fixed gear 522. As the support plate 456 moves, the rack 521 drives the fixed gear 522 to rotate. The rotation of the fixed gear 522 drives the bidirectional screw 523 to rotate. The rotation of the bidirectional screw 523 drives the arc-shaped clamping plate 525 to move relatively along the cross bar 526. After the corrugated pipe 45 is inserted into the air supply pipe 51, the arc-shaped clamping plate 525 fixes the already connected corrugated pipe 45 and air supply pipe 51, thereby improving the connection tightness between the corrugated pipe 45 and the air supply pipe 51.

[0027] Embodiment 4. Refer to Figures 1 - 12 , which is different from the above Embodiment 3 in that a fixed cylinder 221 is fixedly connected to the inner side of the scraper 22. An installation spring 222 is fixedly connected to the inner side of the fixed cylinder 221. One end of the installation spring 222 far from the fixed cylinder 221 is fixedly connected to a connecting rod 223. One end of the connecting rod 223 far from the installation spring 222 is fixedly connected to the stirring shaft 21. A number of installation bolts are circumferentially arranged on the sealing cover 3. A locking block is threadedly connected to the installation bolts. A number of arc-shaped holes are circumferentially formed on the feeding cylinder 2. The installation bolts, the locking block and the arc-shaped holes are used for installing the sealing cover 3 and the feeding cylinder 2; During installation, the stirring shaft 21 is inserted into the feeding cylinder 2. When the stirring shaft 21 enters the feeding cylinder 2, the scraper 22 contracts due to the influence of the inner diameter of the feeding cylinder 2. At this time, the scraper 22 drives the fixed cylinder 221 to squeeze the installation spring 222. After the scraper 22 enters the feeding cylinder 2, under the action of the installation spring 222, the outer wall of the scraper 22 is in close contact with the inner wall of the feeding cylinder 2, thereby improving the subsequent scraping effect on the inner wall of the feeding cylinder 2. After the installation of the scraper 22 and the stirring shaft 21 is completed, the installation bolts are rotated and the installation bolts are rotated to the inner side of the arc-shaped holes. Then the locking block is rotated. After the locking block moves, the top surface of the locking block will press tightly against the feeding cylinder 2. At this time, the installation of the sealing cover 3 and the feeding cylinder 2 is completed.

[0028] An energy-saving crushing method for ores uses the above-mentioned jet mill.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air classifier mill, comprising a mounting frame, wherein a feed cylinder and an air pulverizing system are arranged on the mounting frame, a screw feeding mechanism is arranged at the bottom of the feed cylinder, the air pulverizing system is used for pulverizing materials and collecting the pulverized materials, and the screw feeding mechanism is used for feeding the materials in the feed cylinder into the air pulverizing system, and is characterized in that: A stirring shaft and a scraper are arranged in the feed barrel, the stirring shaft is used to stir the material in the feed barrel, the scraper is used to scrape the inner wall of the feed barrel, the feed barrel is provided with a sealing cover, and the sealing cover is provided with a cleaning mechanism; The cleaning mechanism includes an inclined nozzle, a vertical nozzle, a driving motor, a convex block and a bellows, wherein the inclined nozzle is used to blow air to clean the surface of the scraper, the vertical nozzle is used to blow air to clean the surface of the stirring shaft, and the convex block is used to drive the bellows to retract; The mounting frame is also provided with an air supply mechanism, which includes an air supply pipe and a locking assembly, wherein the air supply pipe is used to supply compressed air to the inclined nozzle and the vertical nozzle, and the locking assembly is used to fix the bellows and the air supply pipe; The driving motor includes two states of low-speed operation and medium-speed operation. When the driving motor is running at low speed, it can drive the stirring shaft to stir the material in the feed barrel. When the stirring shaft is running, it synchronously drives the scraper to scrape the inner wall of the feed barrel. When the driving motor is running at medium speed, it can drive the stirring shaft and the scraper to run while driving the bump to move. The movement of the bump drives the bellows to connect to the air supply pipe.

2. The jet mill according to claim 1, wherein: A fixing frame is fixedly connected to the bottom of the driving motor, and the fixing frame is fixedly connected to the sealing cover. A driving bevel gear is fixedly connected to the output shaft of the driving motor, and a driven bevel gear is meshed on the outer side of the driving bevel gear. An air pipe is fixedly connected to the inner side of the driven bevel gear. One end of the air pipe away from the driven bevel gear passes through the sealing cover and is fixedly connected to an air distribution plate. The air pipe is rotatably connected to the sealing cover, and the stirring shaft is fixedly connected to the bottom surface of the air distribution plate.

3. The air classifier mill according to claim 2, wherein: The inclined nozzles are distributed on both sides of the gas distribution plate, the vertical nozzles are distributed circumferentially on the bottom surface of the gas distribution plate, the inclined nozzles and the vertical nozzles are both connected to the gas distribution plate, and the inclined nozzles are installed on the scraper.

4. The air classifier mill according to claim 3, wherein: A rotating joint is provided at one end of the bellows, and the rotating joint is installed on the gas pipe. The bellows is connected to the gas pipe through the rotating joint. An air permeable plate is fixedly connected to the inner side of one end of the bellows away from the rotating joint, and a guide rod is fixedly connected to the outer side of the air permeable plate. A support plate is fixedly connected to one end of the gas pipe away from the rotating joint, and a limit rod is slidably connected to the bottom of the support plate. Symmetrically distributed grooves are provided on the sealing cover, and the limit rod is fixedly connected in the grooves. A return spring is fixedly connected to the outer side of the support plate, and one end of the return spring away from the support plate is fixedly connected to the inner side of the groove.

5. The air classifier mill according to claim 4, characterized in that: A slider is fixedly connected to the bottom of the bump. A fixed rod is slidably connected to the inner side of the slider. A disc is fixedly connected to the outer side of the fixed rod. A plurality of rectangular holes are formed in the disc in a circumferential distribution. The fixed rod is fixedly connected to the inner side of the rectangular hole. A connecting spring is fixedly connected to the outer side of the slider. One end of the connecting spring away from the slider is fixedly connected to the inner side of the rectangular hole. The disc is fixedly connected to the air delivery pipe.

6. The jet mill according to claim 5, wherein: An air inlet structure is connected to the outer side of the air delivery pipe. The air inlet structure is installed on the mounting bracket. An inner groove is formed at one end of the air delivery pipe away from the air inlet structure. A guide hole is formed on one side of the inner groove. A plug plate is inserted into the inner side of the inner groove. A sliding rod is fixedly connected to the outer side of the plug plate. The sliding rods are circumferentially distributed on the plug plate. A blocking spring is fixedly connected to the sliding rod. One end of the blocking spring away from the sliding rod is fixedly connected to the air delivery pipe. When the guide rod moves, it can pass through the guide hole and contact the plug plate.

7. The jet mill according to claim 6, wherein: The locking assembly includes a rack and a fixed gear. The rack is fixedly connected to the support plate. A bidirectional screw is fixedly connected to the inner side of the fixed gear. The outer end of the bidirectional screw is rotatably connected to a fixing plate. The fixing plate is fixedly connected to the air delivery pipe. An arc-shaped clamping plate is threadedly connected to the bidirectional screw. A cross bar is slidably connected to one side of the arc-shaped clamping plate away from the bidirectional screw. The cross bar is fixedly connected to the fixing plate. After the air delivery pipe and the air inlet pipe are inserted into each other, the arc-shaped clamping plate can clamp and fix the air delivery pipe and the air inlet pipe.

8. The jet mill according to claim 1, wherein: A fixed cylinder is fixedly connected to the inner side of the scraping plate. An installation spring is fixedly connected to the inner side of the fixed cylinder. A connecting rod is fixedly connected to one end of the installation spring away from the fixed cylinder. One end of the connecting rod away from the installation spring is fixedly connected to the stirring shaft.

9. The jet mill according to claim 1, characterized in that: A plurality of mounting bolts are circumferentially arranged on the sealing cover. A locking block is threadedly connected to the mounting bolt. A plurality of arc-shaped holes are circumferentially formed in the feed cylinder. The mounting bolts, the locking blocks and the arc-shaped holes are used for installing the sealing cover and the feed cylinder.

10. An energy-saving crushing method for ores, characterized in that: An airflow mill as described in any one of claims 1-9 is used.

Images