A jet mill and an energy-saving crushing method for ore

Abstract

The present invention relates to the technical field of air flow pulverizers, and discloses an air flow mill and an energy-saving pulverizing method for ore, comprising a mounting frame, a feed barrel and an air flow pulverizing system being provided on the mounting frame, a spiral feeding mechanism being provided at the bottom of the feed barrel, the air flow pulverizing system being used to pulverize materials and collect the pulverized materials, the spiral feeding mechanism being used to feed the materials in the feed barrel into the air flow pulverizing system, a stirring shaft and a scraper being provided in the feed barrel, a sealing cover being provided on the feed barrel, a cleaning mechanism being provided on the sealing cover, and an air supply mechanism being provided on the mounting frame. The present invention can clean the inner wall of the stirring shaft, scraper and feed barrel, thus avoiding the problem of dust overflowing when the stirring shaft is separated from the feed barrel, and can improve the connection stability and tightness between the bellows and the air supply pipe.

Description

Technical Field

[0001] The invention relates to the technical field of air flow pulverizers, in particular to an air flow mill and an energy-saving pulverizing method for ore. Background Art

[0002] Airflow mill is a kind of mill that uses the energy of high-speed airflow or superheated steam to make particles collide, rub or impact and shear with equipment components in the supersonic airflow to achieve ultra-fine grinding. Its core advantages include: high-precision grinding, low-temperature grinding, and pollution-free environment. It is widely used in the processing of superhard materials (such as diamond and silicon carbide) and high-purity materials (such as medicine and ceramic pigments);

[0003] Ore powder is the product obtained by crushing the mined ore. It is the first step in ore processing and smelting, and it is also one of the most important steps. It has many classifications and applications. In order to meet the subsequent processing requirements after the existing ore powder is crushed, it is often necessary to use a jet mill to further reduce the particle size of the ore powder.

[0004] Chinese patent CN202420921662.1 discloses a contamination-proof airflow mill feeding structure, comprising a feed barrel, one side of the bottom end of the feed barrel is movably hinged with a support leg, the other side of the bottom end of the feed barrel is fixedly connected to a fixed slide, an adjusting slider is installed on the outside of the fixed slide, the bottom end of the adjusting slider is movably hinged with a telescopic leg, a mounting cover is installed on one side of the feed barrel, and a drive motor is installed on one side of the mounting cover. The contamination-proof airflow mill feeding structure drives the stirring rod to rotate by a stirring motor to avoid material blockage. The material enters the interior of the feed barrel from the feed tank, and is then transported from the feed barrel to the interior of the airflow mill. The protective cover can maintain the sealing of the feeding to avoid contamination during the feeding process. The protective cover can be removed from the feed tank for cleaning. This structure realizes the function of enhancing protection and avoiding contamination, and solves the problem of poor protection effect.

[0005] However, the above technical solution still has certain defects when used. For example, although its stirring shaft can stir the material in the feed barrel to avoid clogging, the stirring shaft cannot clean the powdered material adhered to the inner wall of the feed barrel, which leads to waste of material. Moreover, when the stirring shaft is disassembled, there is a lot of powdered material adhered to the surface of the stirring shaft and the inner wall of the feed barrel. When the user opens the feed barrel, dust will overflow. The overflowing dust will not only affect the health of the user, but also pollute the surrounding environment and lead to waste of material. Summary of the Invention

[0006] In response to the deficiencies of 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 adhered to the inner wall of the feed barrel while also removing the powdered material adhered to the surface of the stirring shaft, thereby solving the above-mentioned problems.

[0007] 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 being provided on the mounting frame, a spiral feeding mechanism being provided at the bottom of the feed barrel, the air flow pulverizing system being used to pulverize materials and collect the pulverized materials, the spiral feeding mechanism being used to feed the materials in the feed barrel into the air flow pulverizing system, a stirring shaft and a scraper being provided in the feed barrel, the stirring shaft being used to stir the materials in the feed barrel, the scraper being used to scrape the inner wall of the feed barrel, a sealing cover being provided on the feed barrel, and a cleaning mechanism being provided on the sealing cover;

[0008] The cleaning mechanism includes an inclined nozzle, a vertical nozzle, a drive motor, a bump and a bellows. 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 bump is used to drive the bellows to retract.

[0009] The mounting frame is further provided with an air supply mechanism, which includes an air supply pipe and a locking assembly. 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.

[0010] The driving motor includes two states of operation: low speed and medium speed. 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 also driving the bump to move. The movement of the bump drives the bellows to connect with the air supply pipe.

[0011] Preferably, the bottom of the driving motor is fixedly connected to a fixing bracket, the fixing bracket is fixedly connected to the sealing cover, the output shaft of the driving motor is fixedly connected to a driving bevel gear, the outer side of the driving bevel gear is meshed with a driven bevel gear, the inner side of the driven bevel gear is fixedly connected to an air pipe, the 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.

[0012] Preferably, the inclined nozzles are distributed on both sides of the gas distribution plate, the vertical nozzles are circumferentially distributed 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.

[0013] Preferably, a rotary joint is provided at one end of the bellows, and the rotary joint is installed on the gas pipe. The bellows is connected to the gas pipe through the rotary joint, and an air-permeable plate is fixedly connected to the inner side of the end of the bellows away from the rotary joint, and a guide rod is fixedly connected to the outer side of the air-permeable plate, and an end of the gas pipe away from the rotary joint is fixedly connected to a support plate, and the bottom of the support plate is slidably connected to a limit rod, and the sealing cover is provided with symmetrically distributed grooves, and the limit rod is fixedly connected in the groove, and a return spring is fixedly connected to the outer side of the support plate, and the end of the return spring away from the support plate is fixedly connected to the inner side of the groove.

[0014] Preferably, the bottom of the protrusion is fixedly connected to a slider, the inner side of the slider is slidably connected to a fixing rod, the outer side of the fixing rod is fixedly connected to a disc, a plurality of circumferentially distributed rectangular holes are opened on the disc, the fixing rod is fixedly connected to the inner side of the rectangular hole, the outer side of the slider is fixedly connected to a connecting spring, the end of the connecting spring away from the slider is fixedly connected to the inner side of the rectangular hole, and the disc is fixedly connected to the gas pipe.

[0015] Preferably, the outer side of the air supply pipe is connected to an air intake structure, and the air intake structure is installed on the mounting frame. An inner groove is provided at one end of the air supply pipe away from the air intake structure, and a guide hole is provided on one side of the inner groove. A plug plate is inserted into the inner side of the inner groove, and a sliding rod is fixedly connected to the outer side of the plug plate. The sliding rods are circumferentially distributed on the plug plate, and a blocking spring is fixedly connected to the sliding rod. The blocking spring is fixedly connected to the air supply pipe at one end away from the sliding rod. When the guide rod moves, it can pass through the guide hole and contact the plug plate.

[0016] 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 fixed plate, the fixed plate is fixedly connected to the air supply pipe, an arc-shaped splint is threadedly connected to the bidirectional screw, the arc-shaped splint is slidably connected to a cross bar on the side away from the bidirectional screw, the cross bar is fixedly connected to the fixed plate, and after the air supply pipe and the air supply pipe are plugged in, the arc-shaped splint can clamp and fix the air supply pipe and the air supply pipe.

[0017] Preferably, the inner side of the scraper is fixedly connected to a fixed cylinder, the inner side of the fixed cylinder is fixedly connected to a mounting spring, the end of the mounting spring away from the fixed cylinder is fixedly connected to a connecting rod, and the end of the connecting rod away from the mounting spring is fixedly connected to the stirring shaft.

[0018] Preferably, a plurality of mounting bolts are provided on the circumference of the sealing cover, a locking block is threadedly connected to the mounting bolts, a plurality of arc-shaped holes are opened on the circumference of the feed barrel, and the mounting bolts, locking blocks and arc-shaped holes are used to install the sealing cover and the feed barrel.

[0019] An energy-saving pulverizing method for ore uses the above-mentioned air flow mill.

[0020] Compared with the prior art, the present invention provides a jet mill and an energy-saving pulverizing method for ore, which has the following beneficial effects:

[0021] 1. In the present invention, when the stirring shaft needs to be cleaned, the driving motor is controlled to run at medium speed. At this time, the stirring shaft drives the scraper to scrape off the mineral powder attached to the inner wall of the feed barrel. At the same time, after the driving motor runs at medium speed, the driving block moves toward the air supply pipe. The movement of the block drives the bellows to stretch and follow the block to move toward the air supply pipe. Then, the block drives the bellows to connect with the air supply pipe. At this time, the compressed air in the air supply pipe enters the bellows, and then enters the inclined nozzle and the vertical nozzle through the bellows. Then, the compressed air passes through the inclined nozzle and The vertical nozzle sprays out compressed air, and the oblique nozzle blows the surface of the scraper to clean it, thereby clearing the mineral powder attached to the scraper surface. The compressed air sprayed by the vertical nozzle cleans the mineral powder attached to the surface of the stirring shaft, thereby avoiding the problem of a large amount of mineral powder attached to the surface of the stirring shaft and the inner wall of the feed barrel when the stirring shaft is separated from the feed barrel, which will generate a large amount of smoke and dust when the feed barrel is opened, thereby endangering the health of the workers and the environment, and also leading to the waste of mineral powder.

[0022] 2. In the present invention, during the process of the protrusion driving the bellows and the air supply pipe to be plugged in, the locking assembly gradually operates. After the bellows and the air supply pipe are plugged in, the locking assembly fixes the bellows and the air supply pipe, thereby improving the connection stability and tightness between the bellows and the air supply pipe, thereby avoiding the problem of gas leakage after the bellows and the air supply pipe are connected.

[0023] 3. In the present invention, when crushing the mineral powder, the driving motor drives the stirring shaft to rotate, so that the stirring shaft can break up the mineral powder agglomerated in the feed barrel, thereby improving the effect of subsequent mineral powder crushing. In addition, during the stirring process, the stirring shaft simultaneously drives the scraper to scrape the inner wall of the feed barrel, thereby avoiding the problem of the mineral powder adhering to the inner wall of the feed barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first viewing angle;

[0025] Figure 2 A second perspective diagram of the overall structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the mounting frame and feed barrel structure of the present invention;

[0027] Figure 4 It is a side sectional view of the mounting frame and feed barrel structure of the present invention;

[0028] Figure 5 It is a schematic structural diagram of the feed barrel of the present invention;

[0029] Figure 6 This is a side sectional view from a first perspective of the feed barrel structure of the present invention;

[0030] Figure 7 for Figure 6 A schematic diagram of the structure at center A;

[0031] Figure 8 for Figure 6 A magnified schematic diagram of the structure at point B in the middle;

[0032] Figure 9 for Figure 6 A magnified schematic diagram of the structure at point C in the middle;

[0033] Figure 10 A side cross-sectional view from a second perspective of the feed barrel structure of the present invention;

[0034] Figure 11 A side cross-sectional view from a third perspective of the feed barrel structure of the present invention;

[0035] Figure 12 This is a side sectional view of the feed barrel structure of the present invention from the fourth viewing angle.

[0036] Figure: 1. Mounting frame; 2. Feed barrel; 21. Stirring shaft; 22. Scraper; 221. Fixing barrel; 222. Mounting spring; 223. Connecting rod; 3. Sealing cover; 4. Cleaning mechanism; 41. Inclined nozzle; 42. Vertical nozzle; 43. Driving motor; 431. Fixing frame; 432. Active bevel gear; 433. Driven bevel gear; 434. Air pipe; 435. Air distributor; 44. Bump; 441. Slider; 442. Fixing rod; 443. Disc; 444. Connecting spring; 45. Bellows; 451 , rotary joint; 452, breathable plate; 453, guide rod; 454, limit rod; 456, support plate; 457, return 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 splint; 526, cross bar; 6, spiral feeding mechanism; 7, air flow crushing system. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] As introduced in the background technology, there are deficiencies in the existing technology. In order to solve the above technical problems, this application proposes an air flow mill and an energy-saving crushing method for ore.

[0039] Example 1: Please refer to Figures 1-12 A jet mill comprises a mounting frame 1, on which a feed barrel 2 and an air flow pulverizing system 7 are provided, a spiral feeding mechanism 6 is provided at the bottom of the feed barrel 2, the air flow pulverizing system 7 is used to pulverize the material and collect the pulverized material, the spiral feeding mechanism 6 is used to feed the material in the feed barrel 2 into the air flow pulverizing system 7, a stirring shaft 21 and a scraper 22 are provided in the feed barrel 2, the stirring shaft 21 is used to stir the material in the feed barrel 2, the scraper 22 is used to scrape the inner wall of the feed barrel 2, a sealing cover 3 is provided on the feed barrel 2, a feeding port is provided on the sealing cover 3, and a cleaning mechanism 4 is provided on the sealing cover 3;

[0040] The cleaning mechanism 4 includes an inclined nozzle 41, a vertical nozzle 42, a drive motor 43, a bump 44 and a bellows 45. The inclined nozzle 41 is used to blow air to clean the surface of the scraper 22, the vertical nozzle 42 is used to blow air to clean the surface of the stirring shaft 21, and the bump 44 is used to drive the bellows 45 to retract.

[0041] The mounting frame 1 is further provided with an air supply mechanism 5, which includes an air supply pipe 51 and a locking assembly 52. ​​The air supply pipe 51 is used to supply compressed air to the inclined nozzle 41 and the vertical nozzle 42, and the locking assembly 52 is used to fix the bellows 45 and the air supply pipe 51.

[0042] The driving motor 43 includes two states of operation: low speed and medium speed. When the driving motor 43 is running at low speed, it can drive the stirring shaft 21 to stir the material in the feed barrel 2. When the stirring shaft 21 is running, it synchronously drives the scraper 22 to scrape the inner wall of the feed barrel 2. When the driving motor 43 is running at medium speed, it can drive the stirring shaft 21 and the scraper 22 to run, and can also drive the protrusion 44 to move. The movement of the protrusion 44 drives the bellows 45 to connect with the air supply pipe 51.

[0043] During use, the material is poured into the feed barrel 2 through the feed port, and then the drive motor 43 is controlled to operate at a low speed. The drive motor 43 operates at a low speed to drive the stirring shaft 21 to rotate, and the rotation of the stirring shaft 21 drives the scraper 22 to rotate synchronously. The stirring shaft 21 rotates to stir the mineral powder in the feed barrel 2 to avoid blockage and agglomeration. The scraper 22 rotates to clean the mineral powder adhered to the inner wall of the feed barrel 2, and then the spiral feeding mechanism 6 transports the mineral powder to the air flow crushing system 7, and then the air flow crushing system 7 further crushes and collects the mineral powder. When it is necessary to clean the stirring shaft 21, the drive motor 43 is controlled to operate at a medium speed. At this time, the drive motor 43 drives the protrusion 44 to move toward the air supply pipe 51, and the movement of the protrusion 44 drives the bellows 45 to stretch and follow the protrusion 44 to move toward the air supply pipe 51. Then the protrusion 44 drives the bellows 45 to connect with the air supply pipe 51. At this time, the locking component 52 fixes the bellows 45 and the air supply pipe 51. The tightness of the connection between the bellows 45 and the air supply pipe 51 is improved, and then the compressed air in the air supply pipe 51 enters the bellows 45, and then enters the inclined nozzle 41 and the vertical nozzle 42 through the bellows 45, and then the compressed air is ejected through the inclined nozzle 41 and the vertical nozzle 42. The compressed air ejected by the inclined nozzle 41 blows and cleans the surface of the scraper 22, thereby cleaning the mineral powder attached to the surface of the scraper 22, and the compressed air ejected by the vertical nozzle 42 cleans the mineral powder attached to the surface of the stirring shaft 21. The cleaned mineral powder enters the air flow crushing system 7 again through the spiral feeding mechanism 6 for crushing and collection, thereby avoiding the problem of dust overflowing when the stirring shaft 21 is separated from the feeding barrel 2 due to the large amount of mineral powder attached to the surface of the stirring shaft 21 and the inner wall of the feeding barrel 2 when the feeding barrel 2 is opened, thereby endangering the health of the staff and the environment, and also causing the problem of mineral powder waste.

[0044] Example 2: See Figures 1-12, which is different from the above-mentioned embodiment 1, is that the bottom of the driving motor 43 is fixedly connected to a fixing frame 431, the fixing frame 431 is fixedly connected to the sealing cover 3, the output shaft of the driving motor 43 is fixedly connected to a driving bevel gear 432, the outer side of the driving bevel gear 432 is meshed with a driven bevel gear 433, the inner side of the driven bevel gear 433 is fixedly connected to an air supply pipe 434, the end of the air supply pipe 434 away from the driven bevel gear 433 passes through the sealing cover 3 and is fixedly connected to an air distribution plate 435, the air supply pipe 434 is rotatably connected to the sealing cover 3, the stirring shaft 21 is fixedly connected to the bottom surface of the air distribution plate 435, the inclined nozzles 41 are distributed on both sides of the air distribution plate 435, and the vertical nozzles 4 2 are distributed on the bottom surface of the gas distribution plate 435. The inclined nozzle 41 and the vertical nozzle 42 are both connected to the gas distribution plate 435. The inclined nozzle 41 is installed on the scraper 22. A rotary joint 451 is provided at one end of the bellows 45. The rotary joint 451 is installed on the gas pipe 434. The bellows 45 is connected to the gas pipe 434 through the rotary joint 451. The inner side of the end of the bellows 45 away from the rotary joint 451 is fixedly connected to a breathable plate 452. The outer side of the breathable plate 452 is fixedly connected to a guide rod 453. The end of the gas pipe 434 away from the rotary joint 451 is fixedly connected to a support plate 456. The bottom of the support plate 456 is slidably connected to the limit rod 454. The sealing cover 3 is on A symmetrically distributed groove is provided, and a limiting rod 454 is fixedly connected in the groove. A return spring 457 is fixedly connected to the outer side of the support plate 456, and the end of the return spring 457 away from the support plate 456 is fixedly connected to the inner side of the groove. The bottom of the protrusion 44 is fixedly connected to the slider 441, and the inner side of the slider 441 is slidably connected to the fixing rod 442. The outer side of the fixing rod 442 is fixedly connected to the disk 443. A plurality of circumferentially distributed rectangular holes are provided on the disk 443. The fixing rod 442 is fixedly connected to the inner side of the rectangular hole. The outer side of the slider 441 is fixedly connected to the connecting spring 444. The end of the connecting spring 444 away from the slider 441 is fixedly connected to the inner side of the rectangular hole. 443 is fixedly connected to the air delivery pipe 434. The outer side of the air supply pipe 51 is connected to the air intake structure 511, and the air intake structure 511 is installed on the mounting frame 1. An inner groove 512 is formed at the end of the air supply 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 sliding rod 515 is fixedly connected to the outer side of the plug plate 514. The sliding rods 515 are distributed circumferentially on the plug plate 514. A blocking spring 516 is fixedly connected to the sliding rod 515. The end of the blocking spring 516 away from the sliding rod 515 is fixedly connected to the air supply pipe 51. When the guide rod 453 moves, it can pass through the guide hole 513 and contact the plug plate 514.

[0045] When the stirring shaft 21 and the scraper 22 need to be cleaned, the driving motor 43 is controlled to run at a medium speed. The driving motor 43 rotates to drive the active bevel gear 432, which drives the driven bevel gear 433 to rotate. The driven bevel gear 433 rotates to drive the air pipe 434 to rotate, and the air pipe 434 rotates to drive the disc 443 to rotate. Since the driving motor 43 is in a medium-speed running state at this time, the centrifugal force on the protrusion 44 is greater than the elastic force of the connecting spring 444. At this time, the protrusion 4 4 gradually moves outward along the fixed rod 442 toward the disk 443. During the process of outward expansion, the protrusion 44 gradually contacts the support plate 456 and gradually drives the support plate 456 to move along the limit rod 454 toward the air supply pipe 51. The support plate 456 moves to stretch the bellows 45, thereby gradually expanding the bellows 45. The movement of the bellows 45 drives the air permeable plate 452 and the guide rod 453 to move. Then the guide rod 453 is inserted into the guide hole 513 and contacts the plug plate 514. As the bellows 45 continues to expand, the guide rod 453 drives the plug The plate 514 moves away from the bellows 45, and the plug plate 514 moves out of the inner groove 512 and drives the slide bar 515 to move. The slide bar 515 moves to squeeze the blocking spring 516. After the bellows 45 is completely connected with the air supply pipe 51, the compressed air in the air supply pipe 51 enters the bellows 45 through the gap between the plug plate 514 and the air supply pipe 51, and then the compressed air passes through the air permeable plate 452 and enters the bellows 45 and the air supply pipe 434, and then enters the air distribution plate 435. After dispersion, 435 enters the inclined nozzle 41 and the vertical nozzle 42, and then the compressed air sprayed by the inclined nozzle 41 is used to blow and clean the surface of the scraper 22, thereby cleaning the mineral powder attached to the surface of the scraper 22, and the compressed air sprayed by the vertical nozzle 42 is used to clean the mineral powder attached to the surface of the stirring shaft 21, thereby achieving the effect of cleaning the scraper 22, the stirring shaft 21 and the feed barrel 2, thereby avoiding the problem of dust overflowing when the stirring shaft 21 is disassembled later.

[0046] Example 3, see Figures 1-12 , which is different from the above-mentioned embodiment 2, is that 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 to a bidirectional screw 523, the outer end of the bidirectional screw 523 is rotatably connected to a fixed plate 524, the fixed plate 524 is fixedly connected to the air supply pipe 51, the bidirectional screw 523 is threadedly connected to an arc-shaped clamping plate 525, the side of the arc-shaped clamping plate 525 away from the bidirectional screw 523 is slidably connected to a cross bar 526, the cross bar 526 is fixedly connected to the fixed plate 524, and after the air supply pipe 434 is plugged into the air supply pipe 51, the arc-shaped clamping plate 525 can clamp and fix the air supply pipe 434 and the air supply pipe 51;

[0047] When the protrusion 44 drives the support plate 456 to move toward 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 splint 525 to move relative to the cross bar 526. After the bellows 45 and the air supply pipe 51 are plugged in, the arc splint 525 fixes the bellows 45 and the air supply pipe 51 that have been connected, thereby improving the tightness of the connection between the bellows 45 and the air supply pipe 51.

[0048] Example 4, see Figures 1-12 , which is different from the above-mentioned embodiment 3, the inner side of the scraper 22 is fixedly connected to a fixing cylinder 221, the inner side of the fixing cylinder 221 is fixedly connected to a mounting spring 222, the end of the mounting spring 222 away from the fixing cylinder 221 is fixedly connected to a connecting rod 223, the end of the connecting rod 223 away from the mounting spring 222 is fixedly connected to the stirring shaft 21, a plurality of mounting bolts are provided on the circumference of the sealing cover 3, and locking blocks are threadedly connected to the mounting bolts, and a plurality of arc-shaped holes are opened on the circumference of the feeding barrel 2, and the mounting bolts, locking blocks and arc-shaped holes are used to install the sealing cover 3 and the feeding barrel 2;

[0049] During installation, insert the stirring shaft 21 into the feed barrel 2. When the stirring shaft 21 enters the feed barrel 2, the scraper 22 shrinks due to the influence of the inner diameter of the feed barrel 2. At this time, the scraper 22 drives the fixed barrel 221 to squeeze the installation spring 222. After the scraper 22 enters the feed barrel 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 feed barrel 2, thereby improving the subsequent scraping effect on the inner wall of the feed barrel 2. After the scraper 22 and the stirring shaft 21 are installed, turn the mounting bolt and turn the mounting bolt to the inside of the arc hole. Then turn the locking block. After the locking block moves, the top surface of the locking block will press against the feed barrel 2. At this time, the installation of the sealing cover 3 and the feed barrel 2 is completed.

[0050] An energy-saving pulverizing method for ore uses the above-mentioned air flow mill.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A jet mill comprising a mounting frame, a feed barrel and a jet milling system being mounted on the mounting frame, a screw feeding mechanism being disposed at the bottom of the feed barrel, the jet milling system being used to grind and collect the crushed material, and the screw feeding mechanism being used to feed the material in the feed barrel into the jet milling system, characterized in that: A stirring shaft and a scraper are provided in the feeding barrel, the stirring shaft is used to stir the material in the feeding barrel, and the scraper is used to scrape the inner wall of the feeding barrel. A sealing cover is provided on the feeding barrel, and a cleaning mechanism is provided on the sealing cover; The cleaning mechanism includes an inclined nozzle, a vertical nozzle, a drive motor, a bump and a bellows. 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 bump is used to drive the bellows to retract. The mounting frame is further provided with an air supply mechanism, which includes an air supply pipe and a locking assembly. 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 feeding barrel. When the stirring shaft is running, it synchronously drives the scraper to scrape the inner wall of the feeding barrel. When the driving motor is running at medium speed, it can drive the stirring shaft and the scraper to operate while also driving the convex block to move. The movement of the convex block drives the bellows to connect with the air supply pipe. The bottom of the driving motor is fixedly connected to a fixing bracket, and the fixing bracket is fixedly connected to the sealing cover. The output shaft of the driving motor is fixedly connected to a driving bevel gear, and the outer side of the driving bevel gear is meshed with a driven bevel gear. The inner side of the driven bevel gear is fixedly connected to an air supply pipe, and the end of the air supply pipe away from the driven bevel gear passes through the sealing cover and is fixedly connected to an air distribution plate. The air supply pipe is rotatably connected to the sealing cover, and the stirring shaft is fixedly connected to the bottom surface of the air distribution plate. The inclined nozzles are distributed on both sides of the air distribution plate, and the vertical nozzles are circumferentially distributed on the bottom surface of the air distribution plate. The inclined nozzles and the vertical nozzles are both connected to the air distribution plate, and the inclined nozzles are mounted on the scraper.

2. A jet mill according to claim 1, characterized in that: A rotary joint is provided at one end of the bellows, which is installed on the gas pipe. The bellows is connected to the gas pipe through the rotary joint. An air-permeable plate is fixedly connected to the inner side of the end of the bellows away from the rotary joint. A guide rod is fixedly connected to the outer side of the air-permeable plate. An end of the gas pipe away from the rotary joint is fixedly connected to a support plate. The bottom of the support plate is slidably connected to a limit rod. The sealing cover is provided with symmetrically distributed grooves, the limit rod is fixedly connected in the groove, and a return spring is fixedly connected to the outer side of the support plate. An end of the return spring away from the support plate is fixedly connected to the inner side of the groove.

3. A jet mill according to claim 2, characterized in that: The bottom of the protrusion is fixedly connected to a slider, the inner side of the slider is slidably connected to a fixing rod, the outer side of the fixing rod is fixedly connected to a disc, a plurality of rectangular holes distributed circumferentially are opened on the disc, the fixing rod is fixedly connected to the inner side of the rectangular hole, the outer side of the slider is fixedly connected to a connecting spring, the end of the connecting spring away from the slider is fixedly connected to the inner side of the rectangular hole, and the disc is fixedly connected to the gas pipe.

4. The air jet mill according to claim 1, characterized in that: The outer side of the air supply pipe is connected to an air intake structure, and the air intake structure is installed on the mounting frame. An inner groove is provided at one end of the air supply pipe away from the air intake structure, and a guide hole is provided on one side of the inner groove. A plug plate is inserted into the inner side of the inner groove, and a sliding rod is fixedly connected to the outer side of the plug plate. The sliding rods are circumferentially distributed on the plug plate, and a blocking spring is fixedly connected to the sliding rod. The blocking spring is fixedly connected to the air supply pipe at one end away from the sliding rod. When the guide rod moves, it can pass through the guide hole and contact the plug plate.

5. The air jet mill according to claim 2, characterized in that: 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 the fixed plate, the fixed plate is fixedly connected to the air supply pipe, an arcuate clamping plate is threadedly connected to the bidirectional screw, the arcuate clamping plate is slidably connected to a cross bar on the side away from the bidirectional screw, and the cross bar is fixedly connected to the fixed plate. After the air supply pipe and the air supply pipe are plugged in, the arcuate clamping plate can clamp and fix the air supply pipe and the air supply pipe.

6. The jet mill according to claim 1, characterized in that: The inner side of the scraper is fixedly connected to a fixed cylinder, the inner side of the fixed cylinder is fixedly connected to a mounting spring, the end of the mounting spring away from the fixed cylinder is fixedly connected to a connecting rod, and the end of the connecting rod away from the mounting spring is fixedly connected to the stirring shaft.

7. The jet mill according to claim 1, characterized in that: A plurality of mounting bolts are provided on the circumference of the sealing cover, and locking blocks are threadedly connected to the mounting bolts. A plurality of arc-shaped holes are opened on the circumference of the feed barrel. The mounting bolts, locking blocks and arc-shaped holes are used to install the sealing cover and the feed barrel.

8. An energy-saving pulverizing method for ore, characterized in that: A jet mill as described in any one of claims 1 to 7 is used.

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