Scraping mechanism and polycrystalline silicon slurry anti-blocking device

Abstract

The utility model relates to the technical field of polycrystalline silicon production, in particular to a scraping mechanism and a polycrystalline silicon slurry anti-blocking device, which comprise a mounting component, a driving shaft connected with a driving motor, and a follow-up shaft rotationally arranged at the end part of the driving shaft; and a scraping assembly, comprising at least one scraping plate arranged on a follow-up shaft, a mounting piece arranged on a driving shaft, and at least one driving part arranged between the scraping plate and the mounting piece; the driving part controls the scraping plate and the driving shaft to rotate synchronously or relatively; according to the scraping mechanism and the polycrystalline silicon slurry anti-blocking device, the scraping plate rotates on the inner wall of the hydrolysis pipe so as to remove silicon dioxide solids adhered to the inner wall of the hydrolysis pipe, and meanwhile, when the scraping plate is adhered to stubborn silicon dioxide solids, the scraping plate can be indirectly impacted to rotate, so that stubborn silicon dioxide impurities can be conveniently scraped.

Description

Technical Field

[0001] This utility model relates to the technical field of polycrystalline silicon production, and in particular to a scraping mechanism and a polycrystalline silicon slag anti-clogging device. Background Technology

[0002] During the hydrolysis process of polysilicon production, the slurry or residue is transported to the hydrolysis tank via pipelines. Because the slurry contains substances such as chlorosilanes, aluminum trichloride, and silicon powder, it generates a large amount of heat during hydrolysis, resulting in high local temperatures and the production of hydrogen chloride gas. The rising water vapor and hydrogen chloride gas impact the hydrolysis inlet. The water vapor continues to react and hydrolyze at the inlet, producing solid silicon dioxide. Over time, this causes the inlet to gradually narrow, eventually clogging it. Currently, increasing nitrogen purging at the inlet and using nitrogen to suppress the upward flow of water vapor prolongs the clogging process, but this requires a large amount of nitrogen and will eventually lead to blockage. Utility Model Content

[0003] In view of the problems existing in the above-mentioned polycrystalline silicon slag slurry anti-clogging devices, this utility model is proposed.

[0004] Therefore, one of the objectives of this invention is to provide a scraping mechanism for scraping off silica solids adhering to the hydrolysis port.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a scraping mechanism, comprising,

[0006] The mounting assembly includes a drive shaft connected to a drive motor, and a follower shaft rotatably disposed at the end of the drive shaft; and,

[0007] A scraping assembly includes at least one scraping plate disposed on a follower shaft, a mounting member disposed on the drive shaft, and at least one drive portion disposed between the scraping plate and the mounting member.

[0008] The drive unit controls the scraper to rotate synchronously or relative to the drive shaft.

[0009] As a preferred embodiment of the scraping mechanism of this utility model, the mounting component is made of a long rod, and its end is provided with a contact block;

[0010] One of the scraping plates is provided with a drive unit;

[0011] The driving unit includes a mounting block disposed on the scraper plate, a stop block rotatably disposed on the mounting block, and an elastic member disposed between the stop block and the scraper plate;

[0012] The touch block engages with the top of the stop block.

[0013] As a preferred embodiment of the scraping mechanism of this utility model, the mounting component is made of a long rod, and its end is provided with a contact block;

[0014] One of the scraping plates is provided with a drive unit;

[0015] The driving unit includes a mounting cylinder disposed on the scraper, a stop block slidably disposed inside the mounting cylinder, and an elastic member disposed between the mounting cylinder and the stop block;

[0016] The touch block engages with the top of the stop block, and the surface of the touch block that contacts the top of the stop block is an inclined surface or an arc surface.

[0017] As a preferred embodiment of the scraping mechanism of this utility model, the mounting component is made of a disc, and its bottom is provided with a plurality of contact blocks at equal intervals;

[0018] The number of scraping plates is the same as the number of contact blocks, and they are evenly spaced on the follower shaft;

[0019] The drive unit is provided on each of the multiple scraping plates.

[0020] As a preferred embodiment of the scraping mechanism of this utility model, the mounting component is provided with a driving part, and the scraping plate is provided with a contact surface;

[0021] The driving unit includes a mounting block disposed on the mounting member, a stop block rotatably disposed on the mounting block, and an elastic member disposed between the stop block and the mounting member;

[0022] The contact surface mates with the end of the stop block.

[0023] As a preferred embodiment of the scraping mechanism of this utility model, the mounting component is provided with a driving part, and the scraping plate is provided with a contact surface;

[0024] The driving unit includes a mounting cylinder disposed on the mounting member, a stop block slidably disposed inside the mounting cylinder, and an elastic member disposed between the mounting cylinder and the stop block;

[0025] The contact surface mates with the end of the stop block, and the contact surface of the end of the stop block is an arc surface or a slope surface.

[0026] The beneficial effects of this scraping mechanism are as follows: The scraping plate is installed inside the pipe, and under the action of the drive unit, the scraping plate can rotate synchronously with the drive shaft to clean the pipe wall. When encountering stubborn impurities, the scraping plate can be rotated by intermittent impact, which makes it easier to scrape off the stubborn impurities.

[0027] Another objective of this invention is to provide a polycrystalline silicon slurry anti-clogging device for scraping off silica solids adhering to the hydrolysis port.

[0028] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a polycrystalline silicon slag slurry anti-clogging device, including a scraping mechanism, and further comprising;

[0029] A hydrolysis assembly includes a hydrolysis tank, a hydrolysis pipe disposed at the end of the hydrolysis tank, and a feeding pipe connected to the hydrolysis pipe;

[0030] The top of the hydrolysis tube is equipped with a drive motor;

[0031] The drive shaft is located inside the hydrolysis tube, and its end extends out of the hydrolysis tube and is connected to the drive motor.

[0032] As a preferred embodiment of the polycrystalline silicon slag slurry anti-clogging device of the present invention, the mounting component is made of a disc, and the mounting component further includes a plurality of leakage holes disposed on the disc;

[0033] The mounting component is located at the bottom of the feeding pipe.

[0034] In a preferred embodiment of the polycrystalline silicon slag slurry anti-clogging device of this utility model, the diameter of the mounting component is smaller than the inner diameter of the hydrolysis pipe, and the gap between the two allows material to pass through.

[0035] As a preferred embodiment of the anti-clogging device for crystalline silicon slurry described in this utility model, the scraper is L-shaped, with its top end higher than the mounting component;

[0036] The scraping plate is interference-fitted with the inner wall of the hydrolysis tube.

[0037] The beneficial effects of this utility model are: by rotating the scraper on the inner wall of the hydrolysis tube, the silica solids adhering to the inner wall of the hydrolysis tube are removed. At the same time, when encountering stubborn silica solids, the scraper can be rotated by impact, which makes it easier to scrape off stubborn silica impurities. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 An overall schematic diagram of Embodiment 1 is shown;

[0040] Figure 2A schematic diagram of the drive unit structure of Embodiment 1 is shown;

[0041] Figure 3 A schematic diagram of the drive unit structure of Embodiment 2 is shown;

[0042] Figure 4 A schematic diagram of the drive unit structure of Embodiment 3 is shown;

[0043] Figure 5 A schematic diagram of the drive unit structure of Embodiment 4 is shown;

[0044] Figure 6 A schematic diagram of the drive unit structure of Embodiment 5 is shown;

[0045] Figure 7 An overall schematic diagram of Embodiment Six is ​​shown;

[0046] Figure 8 A schematic diagram of the mounting components for Embodiment Six is ​​shown. Detailed Implementation

[0047] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0048] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0049] Example 1, referring to Figure 1 and Figure 2 The first embodiment of this utility model provides a scraping mechanism, which includes an installation component 100 and a scraping component 200.

[0050] The mounting assembly 100 includes a drive shaft 101 connected to the drive motor 400, and a follower shaft 102 rotatably disposed at the end of the drive shaft 101. The rotation of the drive motor 400 can drive the drive shaft 101 to rotate.

[0051] The scraping assembly 200 includes a scraping plate 201 disposed on the follower shaft 102, wherein there is one or more scraping plates 201, preferably multiple scraping plates 201, a mounting member 202 disposed on the drive shaft 101, and at least one drive part 203 disposed between the scraping plate 201 and the mounting member 202.

[0052] The drive unit 203 controls the scraper 201 to rotate synchronously or relative to the drive shaft 101. When the drive shaft 101 rotates, it will drive the mounting part 202 to rotate synchronously. Under the action of the drive unit 203, the mounting part 202 will drive the scraper 201 to move synchronously or relative to each other.

[0053] Furthermore, the mounting component 202 is made of a long rod, with a contact block 202a at its end. The contact block 202a is integrally formed with the mounting component 202, or fixed by welding or bolts. One of the scraping plates 201 is provided with a driving part 203. The driving part 203 includes a mounting block 203a disposed on the scraping plate 201, a stop block 203b rotatably disposed on the mounting block 203a, and an elastic member 203c disposed between the stop block 203b and the scraping plate 201. The elastic member 203c is made of a metal spring.

[0054] The top of the contact block 202a engages with the top of the stop block 203b. When the mounting component 202 drives the contact block 202a to rotate, it will contact the stop block 203b, which can push the stop block 203b and the scraper plate 201 to rotate together, or squeeze the stop block 203b, causing the stop block 203b to rotate and be displaced from the contact block 202a. The mounting component 202 and the drive shaft 101 rotate independently relative to the scraper plate 201.

[0055] The scraper 201 is installed in the pipe. When the scraper 201 and the pipe are in an interference fit, when the mounting part 202 drives the contact block 202a to rotate, it will hit the stop block 203b at the moment of contact, causing the scraper 201 to rotate due to the impact. Then, it squeezes the stop block 203b, causing the stop block 203b to rotate and be misaligned with the contact block 202a. The mounting part 202 and the drive shaft 101 rotate independently relative to the scraper 201. Under the cyclic rotation of the mounting part 202, the scraper 201 will be indirectly hit and rotate, thereby achieving the scraping of impurities from the pipe.

[0056] When the scraper 201 and the pipe are in a clearance fit, when the mounting part 202 drives the contact block 202a to rotate, it will contact the stop block 203b and push the stop block 203b and the scraper 201 to rotate together, thereby achieving scraping and cleaning of the inside of the pipe. When the scraper 201 is stuck by impurities and cannot rotate, the stop block 203b will be impacted and drive the scraper 201 to rotate intermittently to scrape and clean stubborn impurities.

[0057] Example 2, refer to Figure 3This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the driving part 203 includes a mounting cylinder 203d disposed on the scraping plate 201, a stop block 203b slidably disposed inside the mounting cylinder 203d, and an elastic member 203c disposed between the mounting cylinder 203d and the stop block 203b; the elastic member 203c is made of a spring.

[0058] The top of the contact block 202a engages with the top of the stop block 203b, and the surfaces of the contact block 202a and the top of the stop block 203b that are in contact are inclined or curved.

[0059] The top of the contact block 202a cooperates with the top of the stop block 203b. When the mounting part 202 drives the contact block 202a to rotate, it will contact the stop block 203b, which can push the stop block 203b and the scraper 201 to rotate together, or squeeze the stop block 203b, so that the compression elastic element 203c of the stop block 203b is retracted in the mounting cylinder 203d and is offset from the contact block 202a. At this time, the mounting part 202 and the drive shaft 101 rotate independently relative to the scraper 201.

[0060] The remaining structure is the same as that in Example 1.

[0061] Example 3, referring to Figure 4 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the mounting component 202 is made of a disc, and its bottom is provided with a plurality of contact blocks 202a at equal intervals; the number of scraping plates 201 is the same as the number of contact blocks 202a, and they are arranged at equal intervals on the follower shaft 102.

[0062] Multiple scraping blades 201 are provided with driving units 203. When multiple contact blocks 202a rotate, they can simultaneously contact the stops 203b of multiple driving units 203, thereby improving the uniformity of force on multiple scraping blades 201 and increasing the smoothness of the rotation of scraping blades 201.

[0063] The remaining structure is the same as that in Example 2.

[0064] Example 4, refer to Figure 5 This is the fourth embodiment of the present utility model. The difference between this embodiment and the third embodiment is that the mounting part 202 is provided with a driving part 203 and the scraping plate 201 is provided with a contact surface 201a.

[0065] The drive unit 203 includes a mounting block 203a disposed on the mounting member 202, a stop block 203b rotatably disposed on the mounting block 203a, and an elastic member 203c disposed between the stop block 203b and the mounting member 202; the elastic member 203c is made of a bent spring.

[0066] The contact surface 201a engages with the end of the stop 203b; when the drive shaft 101 drives the mounting part 202 and the stop 203b to rotate and contact the contact surface 201a of the scraper 201, the end of the stop 203b contacts the contact surface 201a, which will push the scraper 201 to rotate synchronously; or the end of the stop 203b is squeezed, so that the whole rotates and is misaligned with the scraper 201 before rotating independently.

[0067] Example 5, refer to Figure 6 This is the fifth embodiment of the present utility model. The difference between this embodiment and the fourth embodiment is that the driving part 203 includes a mounting cylinder 203d disposed on the mounting member 202, a stop block 203b slidably disposed inside the mounting cylinder 203d, and an elastic member 203c disposed between the mounting cylinder 203d and the stop block 203b.

[0068] The contact surface 201a mates with the end of the stop 203b, and the contact surface of the end of the stop 203b is an arc surface or a slope surface.

[0069] When the drive shaft 101 drives the mounting part 202 and the stop block 203b to rotate and contact the contact surface 201a of the scraper plate 201, the end of the stop block 203b contacts the contact surface 201a, which will push the scraper plate 201 to rotate synchronously; or the end of the stop block 203b is squeezed and compressed in the mounting cylinder 203d and is separated from the scraper plate 201 before rotating independently.

[0070] Example 6, refer to Figure 7 and Figure 8 This is the sixth embodiment of the present invention, which provides a polycrystalline silicon slag clogging prevention device. The device includes a scraping mechanism and further includes;

[0071] The hydrolysis assembly 300 includes a hydrolysis tank 301, a hydrolysis pipe 302 disposed at the end of the hydrolysis tank 301, and a feeding pipe 303 connected to the hydrolysis pipe 302;

[0072] A drive motor 400 is provided at the top of the hydrolysis tube 302; the drive shaft 101 is located in the hydrolysis tube 302, and its end extends out of the hydrolysis tube 302 and is connected to the drive motor 400.

[0073] The scraper 201 contacts the inner wall of the hydrolysis tube 302. Slurry or residue is added to the hydrolysis tube 302 through the feed pipe. Because the slurry contains substances such as chlorosilane, aluminum trichloride, and silicon powder, a large amount of heat is generated during the hydrolysis process, resulting in high local temperatures and the production of hydrogen chloride gas. The water vapor and hydrogen chloride gas rise and impact the hydrolysis port. The water vapor continues to react and hydrolyze at the hydrolysis port, generating silica solid that adheres to the inner wall of the hydrolysis tube 302. The drive motor 400 controls the drive shaft 101 to drive the mounting part 202 to rotate, and the drive unit 203 drives the scraper 201 to rotate to clean the inner wall of the hydrolysis tube 302.

[0074] Furthermore, the mounting component 202 is made of a disc, and the mounting component 202 also includes multiple leakage holes 202b provided on the disc; the mounting component 202 is located at the bottom of the feeding pipe 303; the slurry or residue enters the hydrolysis pipe 302 from the feeding pipe 303 and falls into the mounting component 202, and then falls into the hydrolysis tank 301 from the leakage holes 202b, which can disperse the slurry or residue and make the hydrolyzed material fall more evenly.

[0075] The scraper 201 is L-shaped, with its top end higher than the mounting part 202. The scraper 201 is interference-fitted with the inner wall of the hydrolysis tube 302. The scraper 201 will rotate intermittently due to impacts inside the hydrolysis tube 302. When it rotates, it can clean the inside of the tube. When it is impacted, the mounting part 202 will be subjected to a recoil force and vibrate, which can prevent the leakage hole 202b from being blocked. At the same time, the diameter of the mounting part 202 is smaller than the inner diameter of the hydrolysis tube 302, and the gap between the two allows material to pass through.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A scraping mechanism, characterized in that: include, The mounting assembly (100) includes a drive shaft (101) connected to a drive motor (400), and a follower shaft (102) rotatably disposed at the end of the drive shaft (101); and, Scraping assembly (200); includes at least one scraping plate (201) disposed on a follower shaft (102), a mounting member (202) disposed on the drive shaft (101), and at least one drive unit (203) disposed between the scraping plate (201) and the mounting member (202); The drive unit (203) controls the scraper (201) to rotate synchronously or relative to the drive shaft (101).

2. The scraping mechanism according to claim 1, characterized in that: The mounting component (202) is made of a long rod with a contact block (202a) at its end. One of the scraping blades (201) is provided with a drive unit (203); The drive unit (203) includes a mounting block (203a) disposed on the scraper plate (201), a stop block (203b) rotatably disposed on the mounting block (203a), and an elastic member (203c) disposed between the stop block (203b) and the scraper plate (201). The top of the touch block (202a) engages with the top of the stop block (203b).

3. The scraping mechanism according to claim 1, characterized in that: The mounting component (202) is made of a long rod with a contact block (202a) at its end. One of the scraping blades (201) is provided with a drive unit (203); The drive unit (203) includes a mounting cylinder (203d) disposed on the scraper (201), a stop block (203b) slidably disposed inside the mounting cylinder (203d), and an elastic member (203c) disposed between the mounting cylinder (203d) and the stop block (203b). The top of the touch block (202a) engages with the top of the stop block (203b), and the surfaces of the touch block (202a) and the top of the stop block (203b) that are in contact are inclined or curved surfaces.

4. The scraping mechanism according to any one of claims 1-3, characterized in that: The mounting component (202) is made of a disc, and its bottom is provided with a plurality of contact blocks (202a) at equal intervals. The number of scraping plates (201) is the same as the number of contact blocks (202a), and they are equally spaced on the follower shaft (102); The drive unit (203) is provided on each of the multiple scraping blades (201).

5. The scraping mechanism according to any one of claims 1-3, characterized in that: The mounting component (202) is provided with a driving part (203), and the scraper (201) is provided with a contact surface (201a). The drive unit (203) includes a mounting block (203a) disposed on the mounting member (202), a stop block (203b) rotatably disposed on the mounting block (203a), and an elastic member (203c) disposed between the stop block (203b) and the mounting member (202). The contact surface (201a) mates with the end of the stop (203b).

6. The scraping mechanism according to any one of claims 1-3, characterized in that: The mounting component (202) is provided with a driving part (203), and the scraper (201) is provided with a contact surface (201a). The drive unit (203) includes a mounting cylinder (203d) disposed on the mounting member (202), a stop (203b) slidably disposed inside the mounting cylinder (203d), and an elastic member (203c) disposed between the mounting cylinder (203d) and the stop (203b). The contact surface (201a) mates with the end of the stop (203b), and the contact surface of the end of the stop (203b) is an arc surface or a slope surface.

7. A polycrystalline silicon slag slurry anti-clogging device, characterized in that: Including the scraping mechanism as described in claim 6, and further comprising: The hydrolysis assembly (300) includes a hydrolysis tank (301), a hydrolysis pipe (302) disposed at the end of the hydrolysis tank (301), and a feeding pipe (303) connected to the hydrolysis pipe (302). The top end of the hydrolysis tube (302) is equipped with a drive motor (400); The drive shaft (101) is located in the hydrolysis tube (302), and its end extends out of the hydrolysis tube (302) and is connected to the drive motor (400).

8. The polycrystalline silicon slag slurry anti-clogging device according to claim 7, characterized in that: The mounting component (202) is made of a disc, and the mounting component (202) also includes a plurality of drainage holes (202b) provided on the disc. The mounting component (202) is located at the bottom of the feeding pipe (303).

9. The polycrystalline silicon slag slurry anti-clogging device according to claim 8, characterized in that: The diameter of the mounting component (202) is smaller than the inner diameter of the hydrolysis pipe (302), and the gap between the two allows material to pass through.

10. The polycrystalline silicon slurry anti-clogging device according to claim 8 or 9, characterized in that: The scraper (201) is L-shaped, with its top end higher than the mounting member (202). The scraping plate (201) and the inner wall of the hydrolysis tube (302) are interference fit.

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