A tool for cleaning silicon powder

Abstract

The utility model discloses a tool of silicon powder cleaning in the field of crystalline silicon production equipment, including dust cover, brush, connecting rod and explosion -proof motor, one end of connecting rod is connected with brush, and the other end is from the top of dust cover and is connected with explosion -proof motor, and the explosion -proof motor drives connecting rod and brush rotate, dust cover outside still is connected with air inlet pipeline and air outlet pipeline, air inlet pipeline is connected fan, and fan blows into air outlet pipeline to the silicon powder of brush cleaning down in dust cover. The tool of silicon powder cleaning provided by the utility model cleans the silicon powder on the electrode through setting dust cover and setting brush in dust cover, avoids the silicon powder from being inhaled into human body when cleaning, influences employee's health, sets up air inlet pipeline and air outlet pipeline on dust cover, collects the silicon powder in dust cover, avoids the silicon powder from flying up and exploding, improves device security. The tool of silicon powder cleaning of the utility model is simple in structure, and safe and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of crystalline silicon production equipment, and in particular to a tool for cleaning silicon powder. Background Technology

[0002] In the polysilicon production process, silicon powder is inevitably generated. This silicon powder adheres to the reduction furnace chassis and the upper part of the electrodes on the chassis. After the polysilicon production batch is harvested, before starting the next batch, the silicon powder on the reduction furnace chassis, the upper part of the electrodes on the surface of the reduction furnace chassis, and the insulator that provides electrical insulation between the reduction furnace chassis and the electrodes need to be cleaned. If the silicon powder on the reduction furnace chassis, the upper part of the electrodes on the upper surface of the reduction furnace chassis, and the silicon powder on the insulator are not cleaned, the impurities adsorbed by the silicon powder during silicon rod harvesting will be blown up by the raw material intake air and adhere to the surface of the silicon core or the growing silicon rod, resulting in a decrease in silicon rod quality. At the same time, the silicon powder on the upper part of the electrodes and the insulator will affect the high-voltage start-up during the polysilicon deposition process, and may even cause short circuits due to the breakdown of the silicon powder on the upper part of the electrodes and the insulator during the high-voltage start-up process.

[0003] When cleaning silicon powder on the reduction furnace chassis, the electrode portion on the upper surface of the reduction furnace chassis, and the insulator that provides electrical insulation between the reduction furnace chassis and the electrode, the silicon powder is very fine, at the micron level, and is easily blown away. This not only affects the cleanliness of the reduction hall where the reduction furnace is placed, but may also lead to the risk of dust explosion and affect the health of employees, causing pneumoconiosis. Utility Model Content

[0004] The purpose of this invention is to provide a tool for cleaning silicon powder. The brush cleans the electrodes inside the protective cover, which solves the problems of easy dust flying, low safety, and impact on employee health during the silicon powder cleaning process.

[0005] To solve the above technical problems, the following technical solution is adopted: This utility model provides a tool for cleaning silicon powder, including a dust cover, a brush, a connecting rod, and an explosion-proof motor. One end of the connecting rod is connected to the brush, and the other end extends from the top of the dust cover and is connected to the explosion-proof motor. The explosion-proof motor drives the connecting rod and the brush to rotate. The dust cover is placed on the outer ring of the electrode, and the brush inside it is fitted onto the electrode and contacts the outer surface of the electrode. The brush rotates to clean the silicon powder on the electrode. An air inlet pipe and an air outlet pipe are also connected to the outside of the dust cover. The air inlet pipe is connected to a fan, and the fan blows air into the dust cover, blowing the silicon powder cleaned by the brush into the air outlet pipe.

[0006] Optionally, the exhaust pipe is connected to a silicon powder box, which is used to collect silicon powder blown into the exhaust pipe.

[0007] Optionally, the air inlet pipe and the air outlet pipe are located on opposite sides of the dust cover, with the air inlet pipe near the bottom of the dust cover and the air outlet pipe near the top of the dust cover.

[0008] Optionally, the electrode is mounted on the mounting hole of the chassis, and an insulator is provided between the electrode and the chassis to isolate the chassis and the electrode. The electrode includes an upper part and a lower part, the upper part extends from the upper surface of the chassis, and the lower part is located below the chassis. The brush is fitted onto the upper part for cleaning.

[0009] Optionally, the brush includes a frame and bristles, the frame having the same shape as the electrode, the frame being larger than the electrode, and the bristles being mounted on the frame.

[0010] Optionally, an elastic pad is provided at the opening edge of the dust cover, the elastic pad being used to seal the dust cover.

[0011] Optionally, the sum of the height of the connecting rod and the height of the brush inside the dust cover is less than the sum of the height inside the dust cover and the height of the elastic pad. When the elastic pad is compressed to its maximum extent, there is a gap between the skeleton on the brush and the chassis.

[0012] Optionally, the thickness of the bristles on the brush is greater than the thickness of the elastic pad, and when the elastic pad is compressed to its maximum extent, there is a gap between the brush frame and the electrode.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: 1. The silicon powder cleaning tool provided by this utility model uses a dust cover with a brush inside to clean the silicon powder on the electrodes, preventing the silicon powder from being inhaled during cleaning and affecting the health of employees. An air inlet and outlet pipe are installed on the dust cover to collect the silicon powder inside, preventing it from flying up and exploding, thus improving the safety of the device. The silicon powder cleaning tool of this utility model has a simple structure and is safe and convenient to use.

[0014] 2. The silicon powder cleaning tool provided by this utility model has an elastic soft pad at the bottom of the dust cover. The elastic soft pad further seals the internal space of the dust cover, and the elastic soft pad contacts the chassis to prevent the dust cover from scratching the chassis. When the elastic soft pad compresses and seals the dust cover, the brush inside will not be affected. Attached Figure Description

[0015] Figure 1 This is one of the structural schematic diagrams of the silicon powder cleaning tool in use according to the embodiments of this utility model; Figure 2This is the second schematic diagram of the silicon powder cleaning tool in use according to an embodiment of this utility model. Figure 3 This is a schematic diagram of the structure of the silicon powder cleaning tool in an embodiment of this utility model; Figure 4 This is a schematic diagram of the brush structure in an embodiment of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Chassis; 2. Electrode; 21. Upper part; 22. Lower part; 3. Insulator; 4. Dust cover; 41. Elastic pad; 42. Air inlet pipe; 43. Air outlet pipe; 5. Explosion-proof motor; 6. Brush; 61. Frame; 62. Brush bristles; 7. Connecting rod. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Example 1

[0020] This embodiment provides a silicon powder cleaning tool, including a dust cover 4, a brush 6, a connecting rod 7, and an explosion-proof motor 5. One end of the connecting rod 7 is connected to the brush 6, and the other end extends from the top of the dust cover 4 and is connected to the explosion-proof motor 5. The explosion-proof motor 5 drives the connecting rod 7 to rotate, and the connecting rod 7 then drives the brush 6 to rotate. The shape of the brush 6 is consistent with that of the electrode 2 to be cleaned, and the size of the brush 6 is slightly larger than that of the electrode 2. When in use, the brush 6 is placed on the electrode 2, and the rotating brush 6 sweeps the silicon powder off the electrode 2.

[0021] An air inlet pipe 42 and an air outlet pipe 43 are connected to the outside of the dust cover 4. The end of the air inlet pipe 42 away from the dust cover 4 is connected to a fan, and the end of the air outlet pipe 43 away from the dust cover 4 is connected to a silicon powder box. The fan blows air into the dust cover 4, and then blows the silicon powder swept down by the brush 6 into the air outlet pipe 43, and finally into the silicon powder box.

[0022] When in use, place the dust cover 4 on the outer ring of the electrode 2 that needs to be cleaned, with the electrode 2 inside the dust cover 4 and the brush 6 inside the dust cover 4 on the electrode 2. Then turn on the explosion-proof motor 5 to drive the brush 6 to rotate, sweeping the silicon powder off the electrode 2 and collecting the silicon powder into the silicon powder box by the air blown in by the fan.

[0023] In this embodiment, a dust cover 4 and a brush 6 are used to clean the silicon powder on the electrode 2, preventing the silicon powder from being inhaled into the human body and affecting human health. An air inlet pipe 42 and an air outlet pipe 43 are used to collect the cleaned silicon powder, improving the silicon powder cleaning efficiency and preventing the cleaned silicon powder from flying up and exploding, thus improving the safety of the device.

[0024] Example 2

[0025] This embodiment provides a tool for cleaning silicon powder based on Embodiment 1, such as... Figure 1 , Figure 3 As shown, electrode 2 is mounted on the mounting hole of chassis 1. An insulator 3 is provided between electrode 2 and chassis 1 to prevent electrical conduction from electrode 2 to chassis 1. Chassis 1 divides electrode 2 into upper part 21 and lower part 22, with upper part 21 extending from the upper surface of chassis 1. During polysilicon production and when polysilicon production stops, silicon powder adheres to chassis 1, the upper part 21 of electrode 2, and the surface of insulator 3 on the upper surface of chassis 1. When starting the next batch of polysilicon production, this silicon powder can cause a short circuit when the silicon core is broken down by high voltage, affecting normal production. It needs to be cleaned using the silicon powder cleaning tool provided in this embodiment. Several electrodes 2 are usually arranged on a chassis 1, and each electrode 2 needs to be cleaned one by one.

[0026] like Figure 1As shown, in some embodiments, the inlet pipe 42 and the outlet pipe 43 are located on opposite sides of the dust cover 4, with the inlet pipe 42 near the bottom of the dust cover 4 and the outlet pipe 43 near the top of the dust cover 4. Gas entering the dust cover 4 through the inlet pipe 42 passes over the bottom of the electrode 2 and blows the silicon powder upwards. The explosion-proof motor 5 can be installed on the top of the dust cover 4. The fan connected to the inlet pipe 42 can be installed on the side of the dust cover 4, or installed separately, connected to the dust cover 4 via the inlet pipe 42. The silicon powder box connected to the outlet pipe 43 can be installed on the side of the dust cover 4, or installed separately, connected to the dust cover 4 via the outlet pipe 43. In use, the dust cover 4 can be moved independently, with a sufficiently long outlet pipe 43 and inlet pipe 42. Alternatively, the inlet pipe 42 and outlet pipe 43 can be made of retractable corrugated pipes to facilitate movement of the dust cover 4 when cleaning electrodes 2 at different locations. A power supply or a device that can be connected to a power source is also installed on the dust cover 4 to supply power to the explosion-proof motor 5 and the fan.

[0027] like Figure 2 , Figure 3 , Figure 4 As shown, the brush 6 includes a frame 61 and bristles 62. The frame 61 has the same shape as the electrode 2 but is larger in size. The bristles 62 are fixed to the frame 61. In use, the brush 6 is directly fitted onto the electrode 2, and the rotating brush 6 cleans the electrode 2. An elastic pad 41 is provided at the edge of the bottom opening of the dust cover 4. The elastic pad 41 is in direct contact with the base 1, preventing scratches and sealing the interior space of the dust cover 4. The sum of the height H1 of the connecting rod 7 and the height H2 of the brush 6 inside the dust cover 4 is less than the sum of the height H3 of the dust cover 4 and the height H4 of the elastic pad 41. The difference between the sum of H1 and H2 and the sum of H3 and H4 is within 3-15 mm. When pressure is applied to the dust cover 4, the elastic pad 41 at the bottom is compressed, and the brush 6 inside the dust cover 4 is unaffected. The thickness of the bristles 62 of the brush 6 is greater than the thickness of the elastic pad 41. After the brush 6 is placed on the electrode 2, the bristles 62 contact the surface of the electrode 2. Then, pressure is applied to the dust cover 4 to compress the elastic pad 41. After the elastic pad 41 is compressed, the frame 61 of the brush 6 will not contact the electrode 2. The bristles 62 still contact the electrode 2 for cleaning, thus avoiding the frame 61 scratching the electrode 2.

[0028] In use, the operator places the dust cover 4 around the electrode 2 that needs to be cleaned, aligns the internal brush 6 with the electrode 2, and puts it on the electrode 2. The elastic soft pad 41 at the bottom of the dust cover 4 contacts the chassis 1. The operator manually presses the dust cover 4 or uses equipment to press the dust cover 4 tightly. Then, the explosion-proof motor 5 and the fan are turned on. The explosion-proof motor 5 drives the connecting rod 7 and the brush 6 to rotate together. The bristles 62 on the brush 6 sweep the silicon powder off the electrode 2. The silicon powder is blown into the exhaust pipe 43 by the fan and finally enters the silicon powder box, completing the cleaning of one electrode 2. Then, the explosion-proof motor 5 and the fan are turned off, and the dust cover 4 is moved to the next electrode 2. The same steps are repeated for the next electrode 2.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tool for cleaning silicon powder, characterized in that, It includes a dust cover, a brush, a connecting rod, and an explosion-proof motor. One end of the connecting rod is connected to the brush, and the other end extends from the top of the dust cover and is connected to the explosion-proof motor. The explosion-proof motor drives the connecting rod and the brush to rotate. The dust cover is placed on the outer ring of the electrode, and the brush inside it is fitted onto the electrode and contacts the outer surface of the electrode. The brush rotates to clean the silicon powder on the electrode. The dust cover is also connected to an air inlet pipe and an air outlet pipe on its outer side. The air inlet pipe is connected to a fan, which blows air into the dust cover and blows the silicon powder cleaned off by the brush into the air outlet pipe.

2. The tool for cleaning silicon powder according to claim 1, characterized in that, The exhaust pipe is connected to a silicon powder box, which is used to collect silicon powder blown into the exhaust pipe.

3. The tool for cleaning silicon powder according to claim 1, characterized in that, The air inlet pipe and the air outlet pipe are located on opposite sides of the dust cover, with the air inlet pipe near the bottom of the dust cover and the air outlet pipe near the top of the dust cover.

4. The tool for cleaning silicon powder according to claim 1, characterized in that, The electrode is mounted on the mounting hole of the chassis. An insulator is provided between the electrode and the chassis to isolate the chassis and the electrode. The electrode includes an upper part and a lower part. The upper part extends from the upper surface of the chassis, and the lower part is located below the chassis. The brush is fitted onto the upper part for cleaning.

5. The tool for cleaning silicon powder according to claim 4, characterized in that, The brush includes a frame and bristles. The frame has the same shape as the electrode, and the size of the frame is larger than the size of the electrode. The bristles are mounted on the frame.

6. The tool for cleaning silicon powder according to claim 5, characterized in that, An elastic pad is provided at the opening edge of the dust cover, and the elastic pad is used to seal the dust cover.

7. The tool for cleaning silicon powder according to claim 6, characterized in that, The sum of the height of the connecting rod and the height of the brush inside the dust cover is less than the sum of the height inside the dust cover and the height of the elastic pad. When the elastic pad is compressed to its maximum extent, there is a gap between the skeleton on the brush and the chassis.

8. The tool for cleaning silicon powder according to claim 6, characterized in that, The thickness of the bristles on the brush is greater than the thickness of the elastic pad, and when the elastic pad is compressed to its maximum extent, there is a gap between the brush frame and the electrode.

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