A jet mill device for preparing a composite aerogel powder material

Abstract

The application discloses a kind of airflow pulverizing device for preparing composite aerogel powder material, comprising: pulverizer frame, discharge fan, high-speed pulverizing mechanism and multistage pulverizing mechanism, the inside fixed mounting of pulverizer frame has hopper, control valve group and bag filter, the gas inlet end of discharge fan is communicated with the discharge pipe of bag filter, the upper and lower ends of multistage pulverizing mechanism are respectively communicated with the feed end of multistage pulverizing mechanism and the top surface of high-speed pulverizing mechanism, the bottom surface of high-speed pulverizing mechanism is communicated by sediment collection tank, the bottom surface of hopper is movably connected with vibrating feed tube.The application is provided with a new high-speed pulverizing mechanism structure, utilizes the relative action of double-channel airflow in narrow pulverizing cabin, makes powder in pulverizing cabin to be pushed by airflow to carry out high-speed impact and friction, carries out powder particle crushing, small particle powder escapes from pulverizing cabin and is discharged, improves powder particle crushing effect and carries out efficient pulverization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of airflow crushing, in particular to an airflow crushing device for preparing composite aerogel powder material. BACKGROUND

[0002] Aerogel is a new type of material with high porosity, low density and excellent thermal insulation performance, which has shown great application potential in aerospace, building insulation and high-efficiency filtration fields. In the preparation process of aerogel material, uniform refinement of powder material is crucial. Airflow crusher is a key equipment to achieve this goal. Existing airflow crushers usually rely on impact force and shear force generated by high-speed airflow to crush powder materials.

[0003] However, due to the limitation of internal structure, such equipment often fails to achieve ideal crushing effect in actual operation, especially for aerogel which has extremely high requirements for particle size distribution. Non-uniform crushing of powder particles leads to unstable performance of aerogel products, limiting its development in high-end application fields. The existing airflow crusher mainly utilizes airflow cyclone motion to drive pre-crushed particles or powder for ascending and screening motion, larger particles are pushed back to the blade crusher by airflow, fine particles ascend and move through the high-speed rotating drum, the drum surface is distributed with several blade structures and the drum is driven by airflow to rotate at a high speed in a diagonal cutting direction. Only through this crushing structure, the secondary crushing of fine powder is carried out, the working effect is low, and it is easy to miss, resulting in low uniformity of powder particles.

[0004] Therefore, the existing problems are researched and improved, and an airflow crushing device for preparing composite aerogel powder material is provided to solve the existing problems, aiming to solve the problems and improve the practical value through the technology. SUMMARY

[0005] The present application aims to solve one of the technical problems in the prior art or related art.

[0006] To this end, the technical solution adopted by the present application is as follows: an airflow crushing device for preparing composite aerogel powder material, comprising: a crusher frame, an outlet fan, a high-speed crushing mechanism and a multi-stage crushing mechanism, a hopper, a control valve group and a bag filter are fixedly installed on the inner side of the crusher frame, the inlet end of the outlet fan is in communication with the outlet pipe of the bag filter, the upper and lower ends of the multi-stage crushing mechanism are respectively in communication with the inlet end of the multi-stage crushing mechanism and the top surface of the high-speed crushing mechanism, the bottom surface of the high-speed crushing mechanism is in communication with the sedimentation collection box, and the bottom surface of the hopper is movably connected with a vibrating feeding pipe.

[0007] The high-speed crushing mechanism comprises a cyclone cabin, a sealing gland, and a crushing cabin between the cyclone cabin and the sealing gland, a top surface of the sealing gland is fixedly connected with an inlet and outlet cover, a top surface of the crushing cabin is provided with a guide cover, a surface of the inlet and outlet cover is provided with a feeding gas pipe, a surface of the feeding gas pipe is provided with a feeding pipe in communication with one end of the vibrating feeding pipe, a bottom surface of the cyclone cabin is provided with a gas inlet end pipe, an output end of the control valve group is provided with a pushing gas pipe and a cyclone gas pipe in communication with the feeding gas pipe and the gas inlet end pipe respectively, an outer periphery of the crushing cabin is provided with a plurality of tangential gas holes for air flow entering, a surface of the guide cover is provided with a plurality of guide holes in communication with the inlet and outlet cover, an inner side of the inlet and outlet cover is provided with a first outlet spiral channel, and an outer periphery of the first outlet spiral channel is provided with a plurality of first sedimentation cavities, the multi-stage crushing mechanism comprises a powder spiral box, a grinding disc cover, and a rotating grinding disc rotatably installed on the bottom surface of the grinding disc cover, an inner side of the powder spiral box is provided with a second outlet spiral channel, and an outer periphery of the second outlet spiral channel is uniformly distributed with a plurality of second sedimentation cavities, an inner side of the rotating grinding disc is provided with a rotating blade shaft located directly above the second outlet spiral channel, and a top surface of the rotating grinding disc is in sliding fit with a bottom surface of the grinding disc cover.

[0008] In a preferred example, the vibrating feeding pipe is arranged in a horizontal direction, and both ends are provided with hoses in communication with the hopper and the feeding pipe respectively, and a bottom surface of the vibrating feeding pipe is fixedly connected with a linear vibrator fixed in the interior of the crushing machine frame.

[0009] In a preferred example, an inner side of the cloth bag filter is provided with a partition plate, and a bottom surface of the partition plate is fixedly installed with a plurality of non-woven fabric cylinders for powder filtering, a bottom end of the cloth bag filter is in communication with a recovery hopper, and a bottom surface of the cyclone cabin is in communication with a sedimentation collection box.

[0010] In a preferred example, inner walls of the crushing cabin and the guide cover are in surface structure, the guide holes are arranged in a beveling direction, and a center axis of the crushing cabin and the guide cover is provided with a through hole for powder and particle guiding.

[0011] In a preferred example, the first outlet spiral channel, the second outlet spiral channel, and the rotating blade shaft are all in spiral shape, and have the same rotation direction and are located on the same center axis.

[0012] In a preferred example, the second sedimentation cavities and the first sedimentation cavities have the same structure and are arranged in a circumferential direction, and a partition piece is arranged between adjacent second sedimentation cavities and first sedimentation cavities.

[0013] In a preferred example, a bottom surface of the grinding disc cover is in frosted plane structure, a surface of the rotating grinding disc is provided with a plurality of grinding plates arranged in a beveling direction, and the grinding plates are bevelled towards the surface of the grinding disc cover, and one side of the grinding plate is provided with a cutting edge.

[0014] The beneficial effects achieved by the present application are:

[0015] 1. In the present application, by setting a new type of high-speed crushing mechanism structure, the relative action of double-flow air flow in the narrow crushing cabin enables the powder to be pushed by the air flow for high-speed impact and friction inside the crushing cabin, and the small particle powder escapes from the crushing cabin and is discharged, thereby improving the powder crushing effect and achieving high-efficiency crushing.

[0016] 2. In the present application, by adding a multi-stage crushing mechanism and a bag filter structure at the discharge end of the high-speed crushing mechanism, under the action of air flow, the powder is transported and forms a cyclone effect by the guide flow of the first discharge spiral channel and the second discharge spiral channel to centrifuge the powder particles, so that the smaller particles directly pass through the first discharge spiral channel and the second discharge spiral channel to be discharged upward, while the larger particles are intercepted inside the first settling chamber and the second settling chamber to be centrifuged and screened, thereby improving the uniformity of the discharged particles.

[0017] 3. In the present application, by arranging a rotating mill disc inside each powder spiral box, the rotating mill disc rotates at high speed under the assistance of air flow to form a mill disc structure with the surface of the mill disc cover for friction and crushing of the powder particles, and the multi-stage crushing structure improves the discharge effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0019] Figure 2 It is a schematic diagram of the process structure of the air flow crushing device of an embodiment of the present application;

[0020] Figure 3 It is a schematic diagram of the high-speed crushing mechanism and the multi-stage crushing mechanism structure of an embodiment of the present application;

[0021] Figure 4 It is a schematic diagram of the exploded structure of the high-speed crushing mechanism of an embodiment of the present application;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the high-speed crushing mechanism and the multi-stage crushing mechanism of an embodiment of the present application;

[0023] Figure 6 It is a schematic diagram of the powder spiral box and the rotating mill disc structure of an embodiment of the present application;

[0024] Figure 7 It is a schematic diagram of the exploded structure of the multi-stage crushing mechanism of an embodiment of the present application.

[0025] Reference signs:

[0026] 100, pulverizer frame; 110, hopper; 120, control valve group; 130, bag filter; 111, vibrating feeding pipe; 112, linear vibrator; 121, pushing air pipe; 122, cyclone air pipe; 131, recovery hopper;

[0027] 200, discharging fan;

[0028] 300, high-speed pulverizing mechanism; 310, cyclone cabin; 320, sealing gland; 330, pulverizing cabin; 340, material guiding cover; 350, feeding and discharging cover; 311, air inlet end pipe; 341, material guiding hole; 351, feeding air pipe; 352, feeding pipe; 353, first discharging spiral; 354, first settling cavity;

[0029] 400, multi-stage pulverizing mechanism; 410, powder cyclone box; 420, grinding disc cover; 430, rotating grinding disc; 411, second discharging spiral; 412, second settling cavity; 431, rotating blade shaft;

[0030] 500, settling and collecting box. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application with reference to the specific embodiments and the accompanying drawings. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0032] Some embodiments of the present application provide a gas flow pulverizing device for preparing composite aerogel powder material.

[0033] In combination with Figures 1-7 As shown in the drawings, the gas flow pulverizing device for preparing composite aerogel powder material provided by the present application comprises a pulverizer frame 100, a discharging fan 200, a high-speed pulverizing mechanism 300 and a multi-stage pulverizing mechanism 400. The hopper 110, the control valve group 120 and the bag filter 130 are fixedly installed on the inner side of the pulverizer frame 100. The air inlet end of the discharging fan 200 is in communication with the discharging pipe of the bag filter 130. The upper and lower ends of the multi-stage pulverizing mechanism 400 are respectively in communication with the feeding end of the multi-stage pulverizing mechanism 400 and the top surface of the high-speed pulverizing mechanism 300. The bottom surface of the high-speed pulverizing mechanism 300 is in communication with the settling and collecting box 500. The bottom surface of the hopper 110 is movably connected with the vibrating feeding pipe 111.

[0034] The high-speed crushing mechanism 300 comprises a cyclone cabin 310, a sealing gland 320, and a crushing cabin 330 between the cyclone cabin 310 and the sealing gland 320, the top surface of the sealing gland 320 is fixedly connected with an inlet and outlet cover 350, the top surface of the crushing cabin 330 is provided with a guide cover 340, the surface of the inlet and outlet cover 350 is provided with an inlet air pipe 351, the surface of the inlet air pipe 351 is provided with a feeding pipe 352 in communication with one end of the vibrating feeding pipe 111, the bottom surface of the cyclone cabin 310 is provided with an air inlet end pipe 311, the output end of the control valve group 120 is provided with a pushing air pipe 121 and a cyclone air pipe 122 in communication with the inlet air pipe 351 and the air inlet end pipe 311 respectively, the outer periphery of the crushing cabin 330 is provided with a plurality of tangential air holes for air flow, the surface of the guide cover 340 is provided with a plurality of guide holes 341 in communication with the inlet and outlet cover 350, the inner side of the inlet and outlet cover 350 is provided with a first outlet spiral 353, and the outer periphery of the first outlet spiral 353 is provided with a plurality of first settling chambers 354, the multi-stage crushing mechanism 400 comprises a powder rotating box 410, a grinding disc cover 420, and a rotating grinding disc 430 rotatably installed on the bottom surface of the grinding disc cover 420, the inner side of the powder rotating box 410 is provided with a second outlet spiral 411, and the outer periphery of the second outlet spiral 411 is uniformly distributed with a plurality of second settling chambers 412, the inner side of the rotating grinding disc 430 is provided with a rotating blade shaft 431 located directly above the second outlet spiral 411, and the top surface of the rotating grinding disc 430 is in sliding fit with the bottom surface of the grinding disc cover 420.

[0035] In this embodiment, the vibrating feeding pipe 111 is arranged in a horizontal direction, and both ends are provided with hoses in communication with the hopper 110 and the feeding pipe 352 respectively, and the bottom surface of the vibrating feeding pipe 111 is fixedly connected with a linear vibrator 112 fixedly installed in the inside of the crusher frame 100.

[0036] Specifically, the vibrating feeding pipe 111 is driven to vibrate and feed by the linear vibrator 112, so that the feeding is continuous and small, and the inside of the crushing cabin 330 is provided with rich space for disordered high-speed movement of the powder particles.

[0037] In this embodiment, the inner side of the cloth bag filter 130 is provided with a partition plate, and the bottom surface of the partition plate is fixedly installed with a plurality of non-woven fabric cylinders for powder filtering, the bottom end of the cloth bag filter 130 is communicated with a recovery hopper 131, and the bottom surface of the cyclone cabin 310 is communicated with a settling collection tank 500.

[0038] In this embodiment, the inner walls of the crushing cabin 330 and the guide cover 340 are in surface structure, the guide holes 341 are arranged in a beveling direction, and the central axes of the crushing cabin 330 and the guide cover 340 are provided with through holes for powder particle discharge.

[0039] Specific, through the material guide hole 341 is oblique import powder particles, in the airflow push under the import of the air pipe 351, and the surface of the grinding chamber 330 air hole import airflow further boost the flow of powder particles, powder particles in the grinding chamber 330 inside high speed rotating flow in the grinding chamber 330 and the inner wall of the material guide cover 340 friction grinding, and the particles collide with each other, the crushed particles, in the direction of the material guide cover 340 surface hole by air flow movement entrainment export, and in the direction of the rotating flow chamber 310 bottom hole, part of the larger powder particles or impurities free fall into the sedimentation collection tank 500 inside the collection.

[0040] In this embodiment, the first discharge spiral 353 and the second discharge spiral 411, the rotating blade shaft 431 are spiral, and the rotation directions are the same and located on the same center axis.

[0041] Specific, the airflow in the first discharge spiral 353 and the second discharge spiral 411, the rotating blade shaft 431 surface flow direction is spiral upward movement, so that the rotating grinding disc 430 is boosted to rotate, and the airflow provides the rotating flow force, so that the powder particles in the airflow rotate and centrifuge.

[0042] In this embodiment, the second sedimentation chamber 412 and the first sedimentation chamber 354 are the same structure and are arranged in the circumferential direction, and the adjacent second sedimentation chamber 412 and the first sedimentation chamber 354 are provided with a partition.

[0043] Specific, under the action of the partition of the second sedimentation chamber 412 and the first sedimentation chamber 354, the rotating flow cannot act on the inside of the second sedimentation chamber 412 and the first sedimentation chamber 354, so that part of the powder particles can be stored in the second sedimentation chamber 412 and the first sedimentation chamber 354, and the powder particles of large particles are stored.

[0044] In this embodiment, the bottom surface of the grinding disc cover 420 is a frosted plane structure, the surface of the rotating grinding disc 430 is provided with a plurality of obliquely arranged grinding plates, and the grinding plates are obliquely opposite to the surface of the grinding disc cover 420. One side of the grinding plate is provided with a cutting edge.

[0045] Specific, in the rotation of the rotating grinding disc 430, the rotating cutting of the powder particles is carried out, and the separated grinding and crushing are carried out by the relative sliding of the grinding disc cover 420.

[0046] The working principle and use process of the application are as follows:

[0047] In the preparation of aerogel powder material, the aerogel powder is put into the hopper 110, and is transported to the feeding pipe 352 under the action of the vibrating feeding pipe 111 and the linear vibrator 112. The feeding gas pipe 351 is connected to the pushing gas pipe 121 to input gas flow and drive the powder in the feeding pipe 352 to move at high speed into the cyclone cabin 310 through the guide hole 341 and enter the crushing cabin 330. Under the action of the cyclone gas pipe 122 connected to the cyclone cabin 310, the gas flow enters the crushing cabin 330 through the tangential holes on the surface of the crushing cabin 330, and the powder in the crushing cabin 330 rotates at high speed, collides with each other and rubs against the inner wall of the crushing cabin 330 to be crushed by the gas flow. The crushed fine particles are carried by the gas flow through the first discharge spiral 353 to the inside of the inlet and outlet cover 350, and move upward along the second discharge spiral 411. Under the action of the gas flow, the powder is transported and centrifuged by the guide flow of the first discharge spiral 353 and the second discharge spiral 411 to form a cyclone effect, so that the small particles directly pass through the first discharge spiral 353 and the second discharge spiral 411 to be discharged, while the large particles are intercepted in the first settling chamber 354 and the second settling chamber 412 to be centrifuged and screened. At the same time, the pushing effect of the gas flow acts on the surface of the rotating blade shaft 431 to make the rotating millstone 430 rotate at high speed. In the relative motion between the rotating millstone 430 and the millstone cover 420, the powder particles are crushed at high speed. The fine powder particles can move freely with the gas flow, while the large particles are stored in the second settling chamber 412. The powder is further crushed by the multi-stage crushing mechanism 400 and then enters the bag filter 130. Under the pumping action of the discharge fan 200, the powder moves under negative pressure through the filter device in the bag filter 130 and is pumped out by the discharge fan 200.

[0048] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A jet milling device for preparing composite aerogel powder material, characterized in that: include: A pulverizing frame (100), a discharge fan (200), a high-speed pulverizing mechanism (300) and a multi-stage pulverizing mechanism (400); a hopper (110), a control valve group (120) and a bag filter (130) are fixedly installed inside the pulverizing frame (100); an air inlet end of the discharge fan (200) is connected to a discharge pipe of the bag filter (130); upper and lower ends of the multi-stage pulverizing mechanism (400) are respectively connected to the feed end of the multi-stage pulverizing mechanism (400) and the top surface of the high-speed pulverizing mechanism (300); the bottom surface of the high-speed pulverizing mechanism (300) is connected to a sedimentation collection box (500); and the bottom surface of the hopper (110) is movably connected to a vibrating feed pipe (111); The high-speed pulverizing mechanism (300) comprises a cyclone chamber (310), a sealing gland (320), and a pulverizing chamber (330) located between the cyclone chamber (310) and the sealing gland (320); the top surface of the sealing gland (320) is fixedly connected to an inlet and outlet cover (350); the top surface of the pulverizing chamber (330) is provided with a material guide cover (340); the surface of the inlet and outlet cover (350) is provided with a feed pipe (351); and the surface of the feed pipe (351) is provided with a feeding pipe (352) connected to one end of the vibrating feed pipe (111); the bottom surface of the cyclone chamber (310) is provided with an air inlet end pipe (311); the output end of the control valve group (120) is provided with a pusher air pipe (121) and a cyclone air pipe (122) respectively connected to the feed air pipe (351) and the air inlet end pipe (311); the outer periphery of the pulverizing chamber (330) is provided with a plurality of air inlets. The surface of the material guide cover (340) is provided with a plurality of material guide holes (341) connected to the material inlet and outlet cover (350), the inner side of the material inlet and outlet cover (350) is provided with a first material discharge swirl (353), and the outer periphery of the first material discharge swirl (353) is provided with a plurality of first sedimentation chambers (354), the multi-stage pulverizing mechanism (400) includes a powder swirl box (410), a grinding disc cover (420) and a grinding disc cover (420) rotatably mounted on the grinding disc cover (420). 0) a rotating grinding disc (430) on the bottom surface, a second discharge convection channel (411) is provided on the inner side of the powder rotary box (410), and a plurality of second sedimentation chambers (412) are evenly distributed on the outer periphery of the second discharge convection channel (411), a rotary blade shaft (431) is provided on the inner side of the rotating grinding disc (430) and is located directly above the second discharge convection channel (411), and the top surface of the rotating grinding disc (430) is slidably fitted with the bottom surface of the grinding disc cover (420).

2. The airflow pulverizing device for preparing composite aerogel powder material according to claim 1, characterized in that: The vibrating feed pipe (111) is arranged in a horizontal direction, and has flexible pipes at both ends respectively connected to the hopper (110) and the feeding pipe (352). The bottom surface of the vibrating feed pipe (111) is fixedly connected to a linear vibrator (112) fixed inside the pulverizer frame (100).

3. The airflow pulverizing device for preparing composite aerogel powder material according to claim 1, characterized in that: A partition is provided on the inner side of the bag filter (130), and a plurality of non-woven fabric cylinders for powder filtering are fixedly mounted on the bottom surface of the partition. The bottom end of the bag filter (130) is connected to a recovery hopper (131), and the bottom surface of the cyclone chamber (310) is connected to a sedimentation collection box (500).

4. The airflow pulverizing device for preparing composite aerogel powder material according to claim 1, characterized in that: The inner walls of the pulverizing chamber (330) and the material guide cover (340) are planar structures, the material guide holes (341) are arranged in an oblique direction, and the central axes of the pulverizing chamber (330) and the material guide cover (340) are provided with through holes for guiding out powder particles.

5. The airflow pulverizing device for preparing composite aerogel powder material according to claim 1, characterized in that: The first discharge convection channel (353), the second discharge convection channel (411), and the rotor shaft (431) are all spiral-shaped, have the same rotation direction, and are located on the same central axis.

6. The airflow pulverizing device for preparing composite aerogel powder material according to claim 1, characterized in that: The second sedimentation chamber (412) and the first sedimentation chamber (354) have the same structure and are arranged in a circumferential direction. A spacer is provided between adjacent second sedimentation chambers (412) and first sedimentation chambers (354).

7. The airflow pulverizing device for preparing composite aerogel powder material according to claim 1, characterized in that: The bottom surface of the grinding disc cover (420) is a frosted flat structure. The surface of the rotating grinding disc (430) is provided with a plurality of grinding plates arranged obliquely, and the grinding plates are obliquely opposite to the surface of the grinding disc cover (420). One side of the grinding plates is provided with a cutting edge.

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