Automatic feeding device for producing silicon micro powder

Abstract

The application discloses a kind of automatic feeding device for silicon powder production, it is related to the field of silicon powder production equipment, including feeding mechanism, the pipeline of feeding mechanism is connected with injection mechanism, another end of injection mechanism is connected with gas supply mechanism, the feeding mechanism includes vertically arranged conveying pipeline and screw rod rotationally installed in its inside.The first injection pipe and the second injection pipe of the injection mechanism cooperate with the interlaced symmetrical link pipeline, so that the gas enters from the different heights on both sides of the conveying pipeline, expands the contact range with the silicon powder, the guide cylinder is shaken in the conical route under the action of servo motor, bending rod, rocker and support frame, dynamically changes the gas flow direction, avoids the local accumulation of silicon powder caused by fixed airflow direction, enhances the blowing and auxiliary conveying effect of gas on silicon powder, reduces the resistance when screw rod is conveyed, prevents the conveying pipeline from being blocked.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of silicon powder production equipment, in particular to an automatic feeding device for silicon powder production. BACKGROUND

[0002] As an important industrial raw material, silicon powder needs to be conveyed to subsequent processing equipment through a feeding device in the production process. At present, the common silicon powder feeding device adopts a spiral conveying mode.

[0003] For example, a raw material feeding machine for spherical silicon powder processing disclosed in CN112249710A comprises a suction hose and a silicon powder processing device. A mounting shell is fixedly installed at the position of the feeding port of the silicon powder processing device, a pneumatic feeder is fixedly installed in the mounting shell, an outlet pipe extending into the silicon powder processing device is fixedly installed at the output end of the pneumatic feeder, a material scattering cover is fixedly installed at the end of the outlet pipe, and the suction hose is fixedly installed at the end of the mounting seat.

[0004] However, in the prior art, the particle size of silicon powder is small (especially superfine silicon powder, the particle size is usually less than 10 microns), the specific surface area is large, and the surface energy is high. Therefore, the silicon powder is easily affected by environmental humidity and static electricity. When the environmental humidity is high, the surface of the silicon powder particles will adsorb water molecules in the air to form a water film. The water molecules will attract adjacent particles through hydrogen bonding, gradually aggregate to form agglomerates, and if the humidity continues to be high, the agglomerates will further combine to form hard lumps. At the same time, during the production and conveying process of the silicon powder, the friction between the particles and the inner wall of the equipment (hopper, screw conveyor, pipeline) will generate static electricity. Since the silicon powder is usually an insulating or semi-insulating material, the electric charge is difficult to release, which causes the particles on the surface to be attracted to each other due to the electrostatic adsorption of the same charge, aggravating the agglomeration phenomenon and forming larger agglomerates. These agglomerates or lumps are easily accumulated in the corners when passing through the hopper, and when accumulated to a certain extent, they will form a "bridge" phenomenon to block the discharge port. In the screw conveyor, there is a gap between the screw blade and the shell, and the agglomerates or lumps will be stuck in the gap. With the rotation of the screw, the agglomerates or lumps will be continuously compacted, causing the conveying to be blocked or even stopped. In the pipeline elbow, the flow direction of the material changes suddenly, the flow rate decreases, and the agglomerates or lumps are more likely to collide and stay inside the elbow due to inertia. After gradual accumulation, the pipeline cross-sectional area is reduced, and finally the pipeline is blocked. SUMMARY

[0005] The purpose of the present application is to provide an automatic feeding device for silicon powder production to solve the problems of pipeline blockage and uneven conveying of the silicon powder feeding device in the background art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: an automatic feeding device for producing silicon powder, comprising a feeding mechanism, a gas injection mechanism communicated with the pipeline of the feeding mechanism, and a gas supply mechanism communicated with the other end of the gas injection mechanism; the feeding mechanism comprises a vertically arranged conveying pipeline and a spiral rod rotatably installed in the conveying pipeline; a motor and a belt transmission assembly are fixedly installed on the top of the conveying pipeline and fixedly connected with the spiral rod; and a feeding tank is communicated with one side of the bottom of the conveying pipeline;

[0007] The gas injection mechanism comprises a first gas injection pipe and a second gas injection pipe; the second gas injection pipe is communicated with one side of the first gas injection pipe; and an adapter pipeline is fixedly communicated with the end of the first gas injection pipe and the end of the second gas injection pipe, and the adapter pipeline is symmetrically distributed on both sides of the conveying pipeline in an up-and-down staggered manner.

[0008] A guide cylinder is arranged on the inner side of the adapter pipeline; a support frame is fixedly connected to the bottom of the guide cylinder; an adapter rod is fixedly connected to one side of the support frame; a bent rod is fixedly connected to the other end of the adapter rod; the end of the adapter rod is perpendicular to the end of the bent rod; the adapter rod is located on the axis of the guide cylinder; a servo motor is further arranged on the inner side of the adapter pipeline; the output end of the servo motor is fixedly connected to one end of the bent rod; and the servo motor drives the adapter rod through the bent rod to make the guide cylinder swing in a conical route and change the flow direction of air.

[0009] Preferably, a partition frame is fixedly installed at the joint of the adapter pipeline and the conveying pipeline; a limiting ring is detachably connected to one side of the partition frame through bolts; the partition frame is located between the limiting ring and the conveying pipeline; and a through hole is formed in the interior of the partition frame and the interior of the limiting ring.

[0010] Preferably, a spherical connector is fixedly installed on one side of the limiting ring; one end of the spherical connector is fixedly connected to the support frame; a positioning bracket is fixedly installed on the inner wall of the adapter pipeline; and the joint of the bent rod and the servo motor is rotatably installed in the interior of the positioning bracket.

[0011] Preferably, a discharge pipeline is communicated with the middle segment of the conveying pipeline; the discharge pipeline is located at the end of the spiral rod blade; the discharge pipeline is located above the two adapter pipelines; the discharge pipeline is inclined downward; the adapter pipelines are inclined upward; and the discharge pipeline is perpendicular to the adapter pipelines.

[0012] Preferably, the gas supply mechanism comprises a hollow base and an adapter cylinder; the adapter cylinder is fixedly installed on the top of the hollow base and is communicated with the hollow base; a crank rocker mechanism is rotatably installed in the interior of the hollow base; and the transmission rod of the crank rocker mechanism is connected with an external power mechanism.

[0013] Preferably, one end of the crank rocker mechanism rocker is rotatably connected with a piston, the piston is slidably arranged in the inside of the adapter cylinder, the adapter cylinder is communicated with the first gas injection pipe, and the piston is located below the adapter cylinder and the first gas injection pipe.

[0014] Preferably, a blocking block is symmetrically and fixedly installed at the top of the adapter cylinder, the blocking block is used for air intake, when the blocking block moves downward, external air is extracted through the blocking block, and when the blocking block moves upward, the blocking block blocks the adapter cylinder, and air is pressed into the first gas injection pipe.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1、In the present application, the screw rod of the feeding mechanism cooperates with the motor and the belt transmission assembly to realize automatic vertical conveying of the silicon powder, improve the feeding efficiency, the feeding box ensures continuous supply of raw materials, the first gas injection pipe and the second gas injection pipe of the gas injection mechanism cooperate with the up-and-down staggered adapter pipeline, so that the gas enters from different heights on both sides of the conveying pipeline, the contact range with the silicon powder is expanded, the guide cylinder swings in a conical route under the action of the servo motor, the bent rod, the adapter rod and the support frame, the gas flow direction is dynamically changed, local accumulation of the silicon powder caused by fixed gas flow direction is avoided, the blowing and auxiliary conveying effect of the gas on the silicon powder is enhanced, the resistance during conveying of the screw rod is reduced, the conveying pipeline is prevented from being blocked, meanwhile, the gas flow can reduce the adhesion between the silicon powders, and the uniformity of conveying is ensured.

[0017] 2、In the present application, the fixed positioning support on the inner wall of the adapter pipeline plays a rotating support role on the joint of the bent rod and the servo motor, so as to ensure stable transmission of the bent rod, the discharge pipeline communicated with the middle section of the conveying pipeline is located at the end of the screw rod blade and above the two adapter pipelines, the inclined downward setting is perpendicular to the inclined upward adapter pipeline, so that the silicon powder conveyed by the screw rod and assisted by the gas of the gas injection mechanism can be smoothly discharged here, the detachable connection of the partition frame and the limiting ring facilitates later maintenance and through-hole cleaning, ensures smooth airflow passage, the through-hole design of the two does not hinder the airflow and can form a certain barrier to the silicon powder, and reduces the reverse material leakage.

[0018] 3、In the present application, the blocking block symmetrically and fixedly installed at the top of the adapter cylinder is used for air intake, when the blocking block moves downward, external air is extracted into the adapter cylinder, when the blocking block moves upward, the blocking block blocks the adapter cylinder, so that the internal air is pressed into the first gas injection pipe, thereby providing a continuous gas source for the gas injection mechanism, the hollow base provides a stable installation space for the crank rocker mechanism, ensures that the crank rocker mechanism can stably rotate, the communication design of the adapter cylinder and the hollow base ensures the integrity of the gas flow passage, the crank rocker mechanism converts the power of the external power mechanism into the reciprocating sliding power of the piston, realizes mechanical transmission of gas suction and discharge, and improves the automation degree of gas supply. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the automatic feeding device for producing silicon powder;

[0020] Figure 2 It is an internal structure schematic view of the gas supply mechanism of the automatic feeding device for producing silicon powder;

[0021] Figure 3 It is a structural split schematic view of the feeding mechanism of the automatic feeding device for producing silicon powder;

[0022] Figure 4 It is a plane structure schematic view of the feeding mechanism and the gas injection mechanism of the automatic feeding device for producing silicon powder;

[0023] Figure 5 It is a three-dimensional structure schematic view of the first gas injection pipe and the second gas injection pipe of the automatic feeding device for producing silicon powder;

[0024] Figure 6 It is an internal structure schematic view of the second gas injection pipe of the automatic feeding device for producing silicon powder;

[0025] Figure 7 It is a plane structure schematic view of the guide cylinder of the automatic feeding device for producing silicon powder;

[0026] Figure 8 It is a three-dimensional structure schematic view of the guide cylinder and the spherical connecting piece of the automatic feeding device for producing silicon powder.

[0027] In the figure: 1, feeding mechanism; 2, gas injection mechanism; 3, gas supply mechanism; 4, feeding tank; 11, conveying pipeline; 12, motor and belt transmission assembly; 13, discharging pipeline; 14, screw rod; 21, first gas injection pipe; 22, second gas injection pipe; 23, connecting pipeline; 24, positioning support; 25, servo motor; 26, guide cylinder; 27, support frame; 28, connecting rod; 29, bent rod; 210, separation frame; 211, limiting ring; 212, spherical connecting piece; 31, hollow base; 32, connecting cylinder; 33, crank rocker mechanism; 34, piston; 35, plugging block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Embodiment one: refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 : a kind of automatic feeding device for silicon powder production, including feeding mechanism 1, the pipeline of feeding mechanism 1 is communicated with injection mechanism 2, another end of injection mechanism 2 is communicated with gas supply mechanism 3, feeding mechanism 1 includes vertically arranged conveying pipe 11 and the screw rod 14 rotationally installed in its interior, the top of conveying pipe 11 is fixedly installed with motor and belt drive assembly 12, motor and belt drive assembly 12 are fixedly connected with screw rod 14, the bottom of conveying pipe 11 one side is communicated with feed tank 4, injection mechanism 2 includes first injection pipe 21 and second injection pipe 22, second injection pipe 22 is communicated in one side of first injection pipe 21, the end of first injection pipe 21 and the end of second injection pipe 22 are fixedly communicated with the adapter pipe 23, the adapter pipe 23 is staggered and symmetrically distributed in the two sides of conveying pipe 11, the inner side of adapter pipe 23 is provided with guide cylinder 26, the bottom of guide cylinder 26 is fixedly connected with support frame 27, one side of support frame 27 is fixedly connected with adapter rod 28, the other end of adapter rod 28 is fixedly connected with bent rod 29, adapter rod 28 is perpendicular to the end of bent rod 29, adapter rod 28 is located on the axis of guide cylinder 26, the inner side of adapter pipe 23 is also provided with servo motor 25, the output end of servo motor 25 is fixedly connected with one end of bent rod 29, servo motor 25 drives adapter rod 28 through bent rod 29, so that guide cylinder 26 is shaken with conical route, change the flow direction of air.

[0030] In this embodiment, the feeding mechanism 1 as the core conveying component, the helical rod 14 in the vertically arranged conveying pipeline 11 rotates under the drive of the top motor and belt transmission assembly 12, and the silicon powder in the feeding tank 4 connected to the bottom side is conveyed upward, at the same time, the gas provided by the gas supply mechanism 3 enters the conveying pipeline 11 through the gas injection mechanism 2, the first gas injection pipe 21 and the second gas injection pipe 22 of the gas injection mechanism 2 divide the gas flow, and then the gas is sent into the conveying pipeline 11 through the end connecting pipeline 23, and the connecting pipeline 23 is staggered and symmetrically distributed on both sides of the conveying pipeline 11, which ensures that the gas can enter from different positions, and when the servo motor 25 inside the connecting pipeline 23 works, the output end drives the bending rod 29 to rotate, because the bending rod 29 is perpendicular to the end of the connecting rod 28 and the connecting rod 28 is located on the axis of the guide cylinder 26, so that the connecting rod 28 drives the guide cylinder 26 to swing in a conical path, and the guide cylinder 26 is stable in position through the bottom fixed support frame 27, and changes the direction of air flow during the swinging process, so that the gas enters the conveying pipeline 11 at a dynamically changing angle and fully contacts with the silicon powder conveyed by the helical rod 14, the helical rod 14 of the feeding mechanism 1 cooperates with the motor and belt transmission assembly 12 to realize the automatic vertical conveying of the silicon powder, improves the feeding efficiency, the feeding tank 4 ensures the continuous supply of raw materials, the first gas injection pipe 21 and the second gas injection pipe 22 of the gas injection mechanism 2 cooperate with the upper and lower staggered and symmetric connecting pipeline 23 to make the gas enter from different heights on both sides of the conveying pipeline 11, expand the contact range with the silicon powder, and the guide cylinder 26 swings in a conical path under the action of the servo motor 25, the bending rod 29, the connecting rod 28 and the support frame 27, dynamically changes the gas flow direction, avoids the local accumulation of silicon powder caused by fixed gas flow direction, enhances the blowing and auxiliary conveying effect of the gas on the silicon powder, reduces the resistance during conveying of the helical rod 14, prevents the conveying pipeline 11 from being blocked, at the same time, the gas flow can reduce the adhesion between the silicon powder, ensures the uniformity of conveying, the gas supply mechanism 3 provides stable gas source for the gas injection mechanism 2, ensures the stability of the gas auxiliary conveying effect, the components work cooperatively to realize the efficient, stable and automatic feeding of the silicon powder, and improve the production continuity and reliability.

[0031] Embodiment two: according to Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, the junction of the connecting pipe 23 and the conveying pipe 11 is fixedly provided with a partition frame 210, one side of the partition frame 210 is detachably connected with a limiting ring 211 through bolts, the partition frame 210 is located between the limiting ring 211 and the conveying pipe 11, the inside of the partition frame 210 and the inside of the limiting ring 211 are both provided with through holes, one side of the limiting ring 211 is fixedly provided with a spherical connecting piece 212, one end of the spherical connecting piece 212 is fixedly connected with the supporting frame 27, the inner wall of the connecting pipe 23 is fixedly provided with a positioning bracket 24, the junction of the bending rod 29 and the servo motor 25 is rotatably installed in the inside of the positioning bracket 24, the middle section of the conveying pipe 11 is communicated with a discharging pipe 13, the discharging pipe 13 is located at the end of the blade of the screw rod 14, the discharging pipe 13 is located above the two connecting pipes 23, the discharging pipe 13 is inclined downward, and the connecting pipe 23 is inclined upward.

[0032] In the embodiment, the junction of the connecting pipe 23 and the conveying pipe 11 is structurally separated by the fixedly installed partition frame 210, one side of the partition frame 210 is detachably connected with the limiting ring 211 through bolts, and the partition frame 210 is located between the limiting ring 211 and the conveying pipe 11, the through holes in the interiors of the two ensure that the airflow can smoothly pass through, one side of the limiting ring 211 is fixedly provided with the spherical connecting piece 212, one end of the spherical connecting piece 212 is fixedly connected with the supporting frame 27 to provide auxiliary support and limiting for the shaking of the guide cylinder 26, the fixed positioning bracket 24 on the inner wall of the connecting pipe 23 rotatably supports the junction of the bending rod 29 and the servo motor 25 to ensure stable transmission of the bending rod 29, the middle section of the conveying pipe 11 is communicated with the discharging pipe 13 located at the end of the blade of the screw rod 14 and above the two connecting pipes 23, the inclined downward arrangement of the discharging pipe 13 is perpendicular to the inclined upward connecting pipe 23, so that the silicon powder conveyed by the screw rod 14 and pushed by the gas auxiliary mechanism 2 can be smoothly guided out at this position, the detachable connection of the partition frame 210 and the limiting ring 211 facilitates later maintenance and cleaning of the through holes to ensure smooth airflow, the through hole design of the two neither hinders the airflow nor forms a certain barrier to the silicon powder to reduce reverse material channeling, the connection of the spherical connecting piece 212 and the supporting frame 27 enhances the stability of the guide cylinder 26 when shaking to avoid affecting the airflow guiding effect due to excessive shaking, the support of the positioning bracket 24 to the junction of the bending rod 29 and the servo motor 25 reduces vibration and wear during transmission to prolong the service life of the components, the position of the discharging pipe 13 at the end of the blade of the screw rod 14 and above the connecting pipe 23, combined with the design of the inclined downward and perpendicular to the connecting pipe 23, can efficiently receive the silicon powder conveyed by the screw and pushed by the gas, the vertical layout can also reduce the interference of the gas on the discharging, the inclined angle utilizes gravity to assist discharging, improves the discharging efficiency, avoids excessive accumulation of the silicon powder in the conveying pipe 11, and ensures continuous and stable feeding process.

[0033] Embodiment three: according to Figures 1-7 As shown in the drawings, the air supply mechanism 3 comprises a hollow base 31 and a connecting cylinder 32, the connecting cylinder 32 is fixedly installed on the top of the hollow base 31 and the hollow base 31 is communicated with the connecting cylinder 32, a crank rocker mechanism 33 is rotatably installed in the inside of the hollow base 31, the transmission rod of the crank rocker mechanism 33 is connected with an external power mechanism, one end of the rocker of the crank rocker mechanism 33 is rotatably connected with a piston 34, the piston 34 is slidably arranged in the inside of the connecting cylinder 32, the connecting cylinder 32 is communicated with the first air injection pipe 21, the piston 34 is located below the intersection of the connecting cylinder 32 and the first air injection pipe 21, the top of the connecting cylinder 32 is symmetrically fixedly installed with a blocking block 35, the blocking block 35 is used for air intake, when the blocking block 35 moves downward, external air is extracted through the blocking block 35, when the blocking block 35 moves upward, the blocking block 35 blocks the connecting cylinder 32, air is pressed into the first air injection pipe 21.

[0034] In this embodiment, the gas supply mechanism 3 is composed of a hollow base 31, a connecting cylinder 32 fixedly installed on the top of the hollow base 31 and connected thereto, a crank rocker mechanism 33 rotatably installed inside the hollow base 31, and a transmission rod connected to an external power mechanism. Under the drive of the external power, one end of the rocker of the crank rocker mechanism 33 drives the rotationally connected piston 34 to slide inside the connecting cylinder 32. The piston 34 is located below the intersection of the connecting cylinder 32 and the first gas injection pipe 21. The connecting cylinder 32 is connected to the first gas injection pipe 21, and the sealing blocks 35 symmetrically fixedly installed on the top of the connecting cylinder 32 are used for air intake. When the sealing blocks 35 move downward, external air is drawn into the connecting cylinder 32. When the sealing blocks 35 move upward, the sealing blocks 35 block the connecting cylinder 32, so that the internal air is pressed into the first gas injection pipe 21, thereby providing a continuous gas source for the gas injection mechanism 2. The hollow base 31 provides a stable installation space for the crank rocker mechanism 33, ensuring its stable rotation. The connecting design of the connecting cylinder 32 and the hollow base 31 ensures the integrity of the gas flow channel. The crank rocker mechanism 33 converts the power of the external power mechanism into the reciprocating sliding power of the piston 34, realizes the mechanical transmission of gas suction and discharge, and improves the automation degree of gas supply. The sliding of the piston 34 in the connecting cylinder 32 cooperates with the action of the sealing blocks 35 to effectively control the suction and discharge of the gas, ensuring the continuity and stability of the gas supply. The sealing blocks 35 are symmetrically installed on the top of the connecting cylinder 32, and when they move downward, external air is drawn in, and when they move upward, the connecting cylinder 32 is blocked and air is pressed into the first gas injection pipe 21. This design improves the efficiency of gas suction and discharge and reduces gas leakage. The piston 34 is located below the intersection of the connecting cylinder 32 and the hollow base 31, which can better cooperate with the sealing blocks 35 to complete the compression and pushing of the gas, enhance the gas pressure, ensure that the gas entering the first gas injection pipe 21 has enough power, and further ensure that the gas injection mechanism 2 can effectively inject gas into the conveying pipe 11 to assist the conveying of the silicon powder. The coordinated work of all parts of the gas supply mechanism 3 provides a stable, continuous and certain pressure gas source for the gas injection mechanism 2, ensures the normal operation of the whole feeding device, and improves the efficiency and stability of the silicon powder feeding.

[0035] The method for using the device and the working principle: when using, the silicon powder in the feeding box 4 enters the bottom of the conveying pipeline 11, the motor and the belt transmission assembly 12 start to drive the spiral rod 14 to rotate, the spiral rod 14 conveys the silicon powder upwards, at the same time, the external power mechanism drives the crank rocker mechanism 33 in the hollow base 31 to rotate, the crank rocker mechanism 33 drives the piston 34 to slide in the connecting cylinder 32, when the blocking block 35 at the top of the connecting cylinder 32 moves downwards, the external air is extracted, when it moves upwards, the connecting cylinder 32 is blocked and the air is pressed into the first gas injection pipe 21, the gas is divided through the first gas injection pipe 21 and the second gas injection pipe 22, then enters the conveying pipeline 11 through the connecting pipeline 23, the servo motor 25 inside the connecting pipeline 23 works, the output end drives the connecting rod 28 through the bent rod 29, so that the guide cylinder 26 swings in a conical route, the intersection of the bent rod 29 and the servo motor 25 is supported by the positioning support 24 on the inner wall of the connecting pipeline 23, the support frame 27 at the bottom of the guide cylinder 26 is supported and limited by the spherical connecting piece 212 on one side of the limiting ring 211, the separation frame 210 between the limiting ring 211 and the conveying pipeline 11 is matched with the through hole of the limiting ring 211 to ensure that the airflow passes through, and the separation frame 210 and the limiting ring 211 are detachably connected by bolts, so as to facilitate maintenance, the gas enters the conveying pipeline 11 at a dynamic angle through the connecting pipeline 23 which is distributed in an upper and lower staggered and symmetrical manner, and fully contacts the silicon powder conveyed by the spiral rod 14, finally, the silicon powder reaches the middle section of the conveying pipeline 11 under the assistance of the gas and the conveying of the spiral rod 14, and is discharged from the discharge pipeline 13 which is located at the blade end of the spiral rod 14, above the two connecting pipelines 23 and inclined downward, the discharge pipeline 13 is vertically arranged with the inclined upward connecting pipeline 23, so as to ensure smooth discharge and not be disturbed by too much gas.

[0036] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications to the technical solutions described in the foregoing embodiments, or make equivalent replacements to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. 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The automatic feeding device for producing silicon powder according to claim 1, characterized in that: ​ 3. The automatic feeding device for producing silicon powder according to claim 2, characterized in that: ​ 4. The automatic feeding device for producing silicon powder according to claim 1, characterized in that: ​ 5. The automatic feeding device for producing silicon powder according to claim 1, characterized in that: The air supply mechanism (3) comprises a hollow base (31) and a connecting cylinder (32), the connecting cylinder (32) is fixedly installed on the top of the hollow base (31) and the hollow base (31) is communicated with the connecting cylinder (32), a crank rocker mechanism (33) is rotatably installed in the hollow base (31), and a transmission rod of the crank rocker mechanism (33) is connected with an external power mechanism.

6. The automatic feeding device for producing silicon powder according to claim 5, characterized in that: One end of a rocker of the crank rocker mechanism (33) is rotatably connected with a piston (34), the piston (34) is slidably arranged in the connecting cylinder (32), the connecting cylinder (32) is communicated with the first air injection pipe (21), and the piston (34) is located below the intersection of the connecting cylinder (32) and the first air injection pipe (21).

7. The automatic feeding device for producing silicon micropowder according to claim 6, characterized in that: Symmetrically, a blocking block (35) is fixedly installed on the top of the connecting cylinder (32), the blocking block (35) is used for air intake, when the blocking block (35) moves downward, external air is drawn through the blocking block (35), when the blocking block (35) moves upward, the blocking block (35) blocks the connecting cylinder (32), and air is pressed into the first air injection pipe (21).

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