Discharging dustproof device of ball mill

Abstract

The utility model provides a discharging dustproof device of a ball mill, which comprises a dustproof cover positioned outside a milling cylinder, a conical flow guide cover is arranged at the bottom of the dustproof cover, a blanking pipe is arranged at the bottom of the conical flow guide cover, an exhaust pipe is arranged on one side of the conical flow guide cover in a penetrating manner, and an exhaust pipe is arranged on the other side of the conical flow guide cover. A filter screen located in the conical flow guide cover is arranged at one end of the exhaust pipe, a cylindrical expansion cavity is formed in the discharging pipe, and a coaxial rotating shaft is arranged in the cylindrical expansion cavity. According to the utility model, the exhaust pipe and the filter screen positioned in the exhaust pipe are arranged on one side of the conical flow guide cover, and then the rotating shaft and the wind shield are arranged in the blanking pipe at the bottom of the conical flow guide cover, so that the exhaust pipe can quickly eliminate flying dust generated by silicon powder blanking in the dust cover when exhausting air, and the flying dust is prevented from being freely diffused. The hidden danger of dust leakage is eliminated, and the dustproof effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball mill dustproof processing technical field, specifically for a ball mill discharge dustproof device. BACKGROUND

[0002] The production process of the silicon powder can use dry ball milling or wet ball milling, the dry ball milling involves a dry type roller ball mill, the roller of the roller ball mill has a material opening, the material opening cover is opened when feeding, the material opening cover is closed after the raw material is loaded, the roller rotates for grinding, the material opening cover is opened when discharging, the grating sieve is replaced, the roller rotates slowly for discharging, the discharging time is long, the existing ball mill has no dustproof measures when discharging, and the dust in the working place is large.

[0003] The utility model with publication number CN208098245U discloses a ball mill discharge dustproof device for silicon powder production, which comprises a dust cover and a screening device, the cylinder is located in the dust cover, the dust cover comprises a square cover body and a hopper, the main shaft at both ends of the cylinder penetrates through both ends of the square cover body, the upper end of the square cover body is provided with a feeding port, the lower end of the hopper is provided with a discharge pipe, the screening device is arranged below the discharge pipe, the screening device comprises a machine shell, a vibrating screen, a vibrating motor, a first collecting box and a second collecting box, the vibrating screen is arranged in the machine shell, the machine shell at the upper end of the vibrating screen is connected with a feeding pipe, the upper end of the feeding pipe is connected with a non-woven fabric cylinder, the non-woven fabric cylinder is fixed on the annular groove of the discharge pipe through a tightening belt, the machine shell on the right side of the vibrating screen is connected with a through pipe, the through pipe is connected with the second collecting box, the first collecting box is placed in the machine shell, and a box door is arranged on the side wall of the machine shell; the ball mill discharge dustproof device can greatly reduce the discharging time, the dust is not discharged during the discharging process, and the silicon powder and the grinding balls can be effectively separated.

[0004] However, the above-mentioned prior art still has the following disadvantages when in use: 1. The dust cover is only used to prevent the silicon powder after ball milling from leaking dust, that is, a large amount of impact dust will be generated when the silicon powder falls into the dust cover, the dust cover can shield the dust to prevent it from leaking out, but the dust in the dust cover is in a state of full and free diffusion, so there is a risk of dust leakage in this dust prevention method; 2. The silicon powder after ball milling settles slowly, that is, part of the silicon powder after ball milling will directly flow to the next processing link, and the other part of the silicon powder will be in a dust state, the silicon powder in a dust state will be easily retained on the inner wall of the dust cover after settling, which increases the residual amount of the silicon powder in the dust cover, and thus reduces the efficiency of subsequent screening processing, and the fan arranged in the dust cover to blow air into the dust cover has poor effect on cleaning the silicon powder, specifically, secondary dusting in the dust cover is likely to occur when air is blown.

[0005] Therefore, the utility model provides a ball mill discharge dustproof device. UTILITY MODEL CONTENTS

[0006] The utility model discloses a ball mill discharge dustproof device to solve the problems in the prior art, and has the advantages of better dustproof effect, the function of reducing the amount of dust raising in the dust cover and quickly eliminating the dust raising, greatly reducing the residual amount of silicon powder in the dust cover, and further making the transmission and subsequent processing of the ground silicon powder more efficient.

[0007] In order to realize the above-mentioned purpose, the utility model is through the following technical scheme to realize: a ball mill discharge dustproof device, including the dust cover of the external location of the grinding cylinder, the bottom of dust cover is provided with the conical fairing, the bottom of conical fairing is provided with the downcomer, the one side of conical fairing is provided with the exhaust pipe, and the one end of exhaust pipe is provided with the filter screen in conical fairing, be provided with the cylindrical expansion chamber in the downcomer, be provided with the coaxial rotating shaft in the cylindrical expansion chamber, the axis of rotating shaft and downcomer is perpendicular and its outer wall is fixedly connected with the wind baffle that the circumferential even distribution, the outside of downcomer is fixedly connected with the output shaft and the control motor of one end fixed connection of rotating shaft.

[0008] Further, the filter screen includes a punched plate and a filter cloth piece bonded to one side of the punched plate, the punched plate is sleeved in the exhaust pipe and detachably connected thereto, and the punched plate is in sealing engagement with the exhaust pipe.

[0009] Further, a support shaft is fixedly connected to the middle of the other side of the punched plate, and a ventilation positioning disc is rotatably sleeved to the inner wall of the exhaust pipe at one end of the support shaft.

[0010] Further, a positioning sleeve ring is welded to the outer periphery of the punched plate, and a sealing rubber ring is fixedly sleeved to the outside of the positioning sleeve ring.

[0011] Further, a transmission shaft is penetratingly arranged at the other side of the conical fairing, and a brush plate opposite to the filter cloth piece is fixedly connected to one end of the transmission shaft.

[0012] Further, the brush plate includes a positioning plate and brush hairs on one side of the positioning plate, and the brush hairs abut against the filter cloth piece.

[0013] Further, a belt pulley one is fixedly connected to the other end of the rotating shaft outside the downcomer, and a belt pulley two is sleeved on the transmission shaft and connected to the belt pulley one through a transmission belt.

[0014] The utility model has the advantages of the following:

[0015] 1. In the utility model, the dust extraction pipe and the filter screen in the dust extraction pipe are arranged on one side of the conical fairing, then the rotating shaft and the wind shield are arranged in the discharging pipe at the bottom of the conical fairing, so that the dust extraction pipe can quickly remove the dust generated by the falling of silicon powder in the dust cover when extracting air, and the free diffusion of the dust is avoided, compared with the prior art, the hidden danger of dust leakage is eliminated, and the dustproof effect is better.

[0016] 2. In the utility model, the dust extraction pipe can quickly eliminate the dust in the dust cover, then the transmission shaft is arranged on one side of the conical fairing, the brush plate that is opposite to the filter cloth on the filter screen is arranged at one end of the transmission shaft, the brush plate can quickly strip the silicon powder accumulated on the filter screen cloth, and the silicon powder transmission efficiency is improved, so that the subsequent processing efficiency is greatly improved. ACCURACY OF DRAWINGS

[0017] Figure 1 It is a structural diagram of the ball mill discharging dustproof device of the utility model;

[0018] Figure 2 It is Figure 1 the front view;

[0019] Figure 3 It is a schematic diagram of the transmission shaft of the ball mill discharging dustproof device of the utility model connected through the transmission belt;

[0020] In the drawing: 1, dust cover; 11, conical fairing; 12, discharging pipe; 121, cylindrical expansion chamber; 2, dust extraction pipe; 3, filter screen; 31, punched plate; 311, support shaft; 3111, ventilation positioning disc; 312, positioning sleeve ring; 3121, sealing rubber ring; 32, filter cloth; 4, rotating shaft; 41, pulley one; 5, brush plate; 51, positioning plate; 52, brush; 6, transmission shaft; 61, pulley two; 7, transmission belt; 8, control motor; 9, wind shield. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0022] Please refer to Figures 1 to 3The utility model provides a technical scheme: a ball mill discharge dustproof device, including the dust cover 1 of dustproof located in the mill cylinder outside, the structure of mill cylinder adopts the structure in the patent literature mentioned in background art, after grinding is finished, control mill cylinder rotation can guide the silicon powder in it into the dust cover 1, the bottom of this dust cover 1 is provided with conical draught cone 11, and the silicon powder is guided to glide quickly in conical draught cone 11, and the bottom of conical draught cone 11 is provided with the discharge pipe 12, and the silicon powder that glides will converge to the discharge pipe 12, then flows into the screening box in the discharge pipe 12 and carries out screening processing, wherein the silicon powder in the mill cylinder enters the dust cover 1 and will produce a large amount of dust flying.

[0023] In the present technology, the air suction pipe 2 is provided on one side of the conical draught cone 11, and the air suction pipe 2 is located on the conical wall of the conical draught cone 11. One end of the air suction pipe 2 is provided with a filter screen 3 located in the conical draught cone 11. In use, the air suction pipe 2 is connected to an external air suction machine. When the air suction pipe 2 is in air suction, an air flow is generated in the conical draught cone 11 and flows towards the air suction pipe 2. In use, the feed inlet cover on the top of the dust cover 1 can be opened for air supply. The dust flying can be quickly eliminated, and the dust can be blocked in the dust cover 1 by the filter screen 3. When the amount of silicon powder on the filter screen 3 increases, it will fall and flow into the discharge pipe 12 along the conical wall of the conical draught cone 11.

[0024] Further, the discharge pipe 12 is provided with a cylindrical expansion chamber 121. A cylinder can be connected to the discharge pipe 12. The inner cavity of the cylinder forms the cylindrical expansion chamber 121. A shaft 4 is coaxially arranged in the cylindrical expansion chamber 121. The shaft 4 is perpendicular to the axis of the discharge pipe 12, and the outer peripheral wall of the shaft 4 is fixedly connected to wind baffles 9 which are uniformly distributed in the circumferential direction. In specific implementation, the outer periphery of the wind baffles 9 is in a state of approximate contact with the inner wall of the cylindrical expansion chamber 121. This arrangement has the function of blocking the air flow in the screening box connected to the discharge pipe 12 from flowing back into the dust cover 1, so that the discharge pipe 12 can normally discharge. The outer side of the discharge pipe 12 is fixedly connected to a control motor 8 fixedly connected to one end of the shaft 4. The control motor 8 provides driving force for the rotation of the shaft 4. When the shaft 4 rotates, the adjacent wind baffles 9 will transfer the silicon powder and dust flying in the upper part of the cylindrical expansion chamber 121 to the discharge pipe 12 below the cylindrical expansion chamber 121.

[0025] In the embodiment, the filter screen 3 comprises a punched plate 31 and a filter cloth piece 32 attached to one side of the punched plate 31. The attachment can be achieved by using a magic tape structure. The filter cloth piece 32 can further improve the filtering effect, so that the silicon powder is kept in the dust cover 1 to the maximum extent. The punched plate 31 is sleeved in the air duct 2 and detachably connected to the air duct 2. The punched plate 31 is sealingly matched with the air duct 2. In a specific implementation, a positioning collar 312 is welded to the outer periphery of the punched plate 31. A sealing rubber ring 3121 is fixedly sleeved outside the positioning collar 312. The outer peripheral wall of the sealing rubber ring 3121 abuts against the inner wall of the air duct 2. The positioning collar 312 is provided to facilitate the removal of the filter screen 3 for replacement of the filter cloth piece 32, thereby improving the convenience of later maintenance.

[0026] Specifically, a support shaft 311 is fixedly connected to the middle portion of the other side of the punched plate 31. A ventilation positioning disc 311 is rotatably sleeved at one end of the support shaft 311 and screw-connected to the inner wall of the air duct 2. A through hole is formed in the disc surface of the ventilation positioning disc 311, and threads are arranged on the outer periphery of the ventilation positioning disc 311. The support shaft 311 can be pulled outwards by rotating the ventilation positioning disc 311. Finally, the filter screen 3 is pulled out of the air duct 2.

[0027] In the embodiment, a transmission shaft 6 is arranged through the other side of the conical fairing 11. In a specific implementation, a positioning sleeve is fixedly arranged outside the transmission shaft 6 on the other side of the conical fairing 11. The positioning sleeve is rotatably connected to the transmission shaft 6. A brush plate 5 is fixedly connected to one end of the transmission shaft 6 and opposite to the filter cloth piece 32. The rotation of the transmission shaft 6 and the brush plate 5 can strip the silicon powder accumulated on the filter cloth piece 32, thereby accelerating the falling and transmission of the silicon powder.

[0028] Further, the brush plate 5 comprises a positioning plate 51 and brush hairs 52 arranged on one side of the positioning plate 51. The brush hairs 52 abut against the filter cloth piece 32. The brush hairs 52 can reduce the scraping force on the filter cloth piece 32, thereby prolonging the service life of the filter cloth piece 32.

[0029] In the embodiment, the other end of the rotating shaft 4 is fixedly connected to a pulley one 41 arranged outside the discharging pipe 12. A pulley two 61 is sleeved on the transmission shaft 6. The pulley two 61 is connected to the pulley one 41 through a transmission belt 7. That is, when the rotating shaft 4 rotates, the transmission shaft 6 rotates under the transmission of the transmission belt 7. The structure can be simplified, and the cost investment can be reduced.

[0030] Working principle: when in use, the exhaust pipe 2 is connected with the external exhaust fan through the hose, when the grinding cylinder rotates and discharges, the control exhaust pipe 2 exhausts air outward, the dust generated when the silica powder falls into the dust cover 1 will be quickly absorbed by the exhaust pipe 2, avoiding the spread of dust, a part of the silica powder will directly and flow into the discharge pipe 12, then enter the two adjacent baffle plates 9 between the upper part of the cylindrical expansion chamber 121, start the control motor 8, the rotating shaft 4 rotates, the adjacent baffle plate 9 will transfer the silica powder in the upper part of the cylindrical expansion chamber 121 to the discharge pipe 12 below the cylindrical expansion chamber 121, then enter the subsequent screening box, another part of the silica powder in the state of dust will gather on the filter cloth 32, the running brush plate 5 will strip the gathered silica powder, after stripping, the silica powder will fall into the discharge pipe 12, and then enter the subsequent screening box through the baffle plate 9.

[0031] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A ball mill discharge dustproof device, comprising a dust cover (1) located outside the grinding cylinder, the bottom of the dust cover (1) is provided with a conical fairing (11), the bottom of the conical fairing (11) is provided with a discharge pipe (12), characterized in that, One side of the conical fairing (11) is provided with an air exhaust pipe (2), one end of the air exhaust pipe (2) is provided with a filter screen (3) located in the conical fairing (11), a cylindrical expansion cavity (121) is arranged in the downcomer (12), a coaxial rotating shaft (4) is arranged in the cylindrical expansion cavity (121), the rotating shaft (4) is perpendicular to the axis of the downcomer (12), and the outer peripheral wall of the rotating shaft (4) is fixedly connected with circumferentially uniformly distributed wind baffles (9), and the outer side of the downcomer (12) is fixedly connected with an output shaft and a control motor (8) fixedly connected with one end of the rotating shaft (4).

2. A ball mill discharge dust prevention device according to claim 1, characterized in that: The filter screen (3) comprises a punched plate (31) and a filter cloth piece (32) bonded on one side of the punched plate (31), the punched plate (31) is sleeved in the air exhaust pipe (2) and can be detachably connected, and the punched plate (31) is in sealing fit with the air exhaust pipe (2).

3. A ball mill discharge dust prevention device according to claim 2, characterized in that: The other side of the punched plate (31) is fixedly connected with a support shaft (311) in the middle, one end of the support shaft (311) is rotatably sleeved with a ventilation positioning disc (3111) screwed with the inner wall of the air exhaust pipe (2).

4. A ball mill discharge dust prevention device according to claim 2, characterized in that: The outer periphery of the punched plate (31) is welded with a positioning sleeve ring (312), and the outer portion of the positioning sleeve ring (312) is fixedly sleeved with a sealing rubber ring (3121).

5. A ball mill discharge dust prevention device according to claim 2, characterized in that: The other side of the conical fairing (11) is provided with a transmission shaft (6), one end of the transmission shaft (6) is fixedly connected with a brush plate (5) opposite to the filter cloth piece (32).

6. A ball mill discharge dust prevention device according to claim 5, characterized in that: The brush plate (5) comprises a positioning plate (51) and brush hairs (52) located on one side of the positioning plate (51), and the brush hairs (52) abut against the filter cloth piece (32).

7. A ball mill discharge dust prevention device according to claim 5, characterized in that: The other end of the rotating shaft (4) is fixedly connected with a pulley one (41) located on the outer side of the downcomer (12), a pulley two (61) is sleeved on the transmission shaft (6), and the pulley two (61) is connected with the pulley one (41) through a transmission belt (7).

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