Polycrystalline silicon conveying line

Abstract

The utility model provides a polycrystalline silicon conveying line, and relates to the technical field of polycrystalline silicon. The cleaning device comprises a shell, a conveying belt is arranged in the shell, a supporting frame is arranged at the bottom of the shell, a first cleaning assembly and a second cleaning assembly are arranged in the shell and located on the inner side and the outer side of the conveying belt respectively, the first cleaning assembly comprises a first suction pipe which is arranged on the inner side of the conveying belt and connected with the shell, and a first suction groove is formed in the first suction pipe. The second cleaning assembly comprises a second suction pipe which is arranged on the outer side of the conveying belt and connected with the shell, a second suction groove is formed in the second suction pipe, and the first suction pipe and the second suction pipe communicate with suction equipment. According to the utility model, polycrystalline silicon fine materials are prevented from being attached to the belt to cause abrasion of the belt and the carrier rollers, and non-silicon substances are prevented from being generated.

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon, in particular to a polysilicon conveying line. Background Art

[0002] Electronic grade polysilicon is an electronic material that uses industrial silicon as raw material and is purified through a series of physical and chemical reactions to reach a certain purity. The quality requirements for electronic grade polysilicon are extremely strict. Each batch of products should be tested for base phosphorus resistivity or donor impurity concentration, base boron resistivity or acceptor impurity concentration, minority carrier lifetime, oxygen and carbon concentration, structure, surface quality, and size. The base metal impurities and surface metal impurity content are type inspections. If one of the inspection results is unqualified in the judgment items, double sampling will be taken for re-inspection of the unqualified item. Products that still fail the inspection results will be directly judged as unqualified products.

[0003] At present, block polysilicon is mainly transported by high-purity polyurethane conveyor belts during the production process. During the transportation process, it is screened by a magnetic separator and then bagged. The fine particles in the polysilicon (particle size 1-3mm) are easily attached to the polyurethane belts during the transportation process. Since the polysilicon fine particles have irregular sharp edges, the fine particles will wear and hit the belts and rollers during the contact between the belts and rollers, which will not only reduce the service life of the belts and rollers, but also the belts and rollers will drop non-silicon substances and mix into the materials, resulting in reduced product quality. Utility Model Content

[0004] The utility model aims to develop a polysilicon conveying line which can avoid polysilicon fine materials adhering to the belt to cause the belt and the roller to wear and avoid the generation of non-silicon substances.

[0005] The utility model is achieved through the following technical solutions:

[0006] A polysilicon conveying line, comprising:

[0007] case;

[0008] A conveyor belt is arranged in the shell;

[0009] A support frame is arranged at the bottom of the shell;

[0010] A first cleaning assembly is disposed in the housing and on the inner side of the conveyor belt;

[0011] A second cleaning assembly is disposed in the housing and outside the conveyor belt;

[0012] Among them, the first cleaning component includes a first suction pipe arranged on the inner side of the conveyor belt and connected to the shell, and the first suction pipe is provided with a first suction groove. The second cleaning component includes a second suction pipe arranged on the outer side of the conveyor belt and connected to the shell, and the second suction pipe is provided with a second suction groove. The first suction pipe and the second suction pipe are connected to the suction device.

[0013] Optionally, the conveyor belt includes a belt, both ends of which are respectively mounted on two roller shafts, a plurality of rollers are rollingly provided on the inner wall of the belt, the plurality of rollers and the two roller shafts are rotatably connected to the shell, and the roller shaft is transmission-connected to the driving source.

[0014] Optionally, the first cleaning component is arranged at the roller, and the second cleaning component is arranged at the outside of the roller shaft.

[0015] Optionally, the first cleaning assembly includes two first suction pipes arranged parallel to the roller, and the two first suction pipes are symmetrically arranged on both sides of the roller.

[0016] Optionally, the first cleaning assembly further comprises a header disposed on the outer wall of the shell, the two first suction pipes are connected to the header, and the header is connected to the suction device.

[0017] Optionally, the first suction groove is arranged on the side of the first suction pipe close to the roller, and a plurality of first suction grooves are opened on the first suction pipe.

[0018] Optionally, a plurality of the first suction grooves are arranged at equal intervals on the first suction pipe, and the first suction grooves on two first suction pipes are staggered in the belt traveling direction.

[0019] Optionally, the angle between the first suction groove on the circumference of the first suction pipe and a belt perpendicular line passing through the axis of the first suction pipe is 45°.

[0020] Optionally, the second suction pipe is arranged parallel to the roller axis, the second suction pipe is arranged obliquely below the roller axis, and a plurality of second suction grooves are opened on the second suction pipe at equal intervals.

[0021] Optionally, the shell includes two parallel guard plates, the guard plates are arranged along the layout track of the conveyor belt, a plurality of support rods are connected between the bottoms of the two guard plates, and the first suction pipe and the second suction pipe are both connected to the guard plates.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides a first cleaning component and a second cleaning component to clean the polysilicon fine material on the inner wall and outer surface of the belt respectively, thereby avoiding the wear of the polysilicon fine material and the belt, rollers and roller shafts causing a reduction in the service life of the components, and avoiding the mixing of non-silicon substances into the polysilicon causing the product quality to be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 It is a schematic diagram of the conveyor belt structure;

[0027] Figure 3 is a schematic diagram of the structure of the first cleaning component;

[0028] Figure 4 Schematic diagram of the structure of the second cleaning component.

[0029] Figure numerals: 100, shell; 200, support frame; 300, first cleaning component; 301, header; 302, first exhaust pipe; 303, first suction pipe; 304, first suction trough; 400, second cleaning component; 401, second exhaust pipe; 402, second suction pipe; 403, second suction trough; 500, conveyor belt; 501, belt; 502, roller; 503, roller. DETAILED DESCRIPTION

[0030] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0032] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0033] like Figures 1 to 4 As shown, the utility model discloses a polysilicon conveyor line, including a housing 100, a support frame 200 is provided at the bottom of the housing 100, a conveyor belt 500 is provided inside the housing 100, and the conveyor belt 500 has a horizontal section and an inclined section. The inclined section of the conveyor belt 500 conveys the polysilicon, and the horizontal section of the conveyor belt 500 conveys the polysilicon and cooperates with a magnetic separator to magnetically separate the polysilicon.

[0034] The shell 100 includes two parallel guard plates, which are arranged along the layout track of the conveyor belt 500. A plurality of support rods are connected between the bottoms of the two guard plates, and the two guard plates are formed into an integrated structure by the pulling of the support rods.

[0035] The conveyor belt 500 includes a belt 501, and guide rails cooperating with the belt 501 are correspondingly arranged on the inner walls of the two guard plates. Roller shafts 502 rotatably connected to the two guard plates are respectively arranged at both ends of the belt 501. The two ends of the belt 501 are respectively sleeved on the two roller shafts 502. The roller shafts 502 are connected to a driving source (not shown in the figure) to rotate and drive the belt 501 to circulate.

[0036] The inner wall of the belt 501 is rotatably provided with a plurality of rollers 503 , and both ends of the rollers 503 are rotatably connected to the two guard plates respectively. The rollers 503 are in rolling contact with the inner wall of the belt 501 , supporting the circular motion of the belt 501 .

[0037] Two first cleaning components 300 are provided inside the belt 501 , and a second cleaning component 400 is provided outside the belt 501 . The first cleaning component 300 and the second cleaning component 400 respectively suck the polysilicon fine material on the inner wall and outer surface of the belt 501 .

[0038] The two first cleaning assemblies 300 are both arranged on the inner side of the inclined section of the conveyor belt 500, and are respectively arranged at the rollers 503 at the bottom and top of the inclined section of the conveyor belt 500.

[0039] The first cleaning assembly 300 includes two first suction pipes 303 symmetrically arranged on both sides of the roller 503. The two first suction pipes 303 are arranged parallel to the roller 503, and the two first suction pipes 303 are connected to the guard plates on both sides of the conveyor belt 500. The first suction pipe 303 is provided with a plurality of first suction grooves 304 on the side close to the roller 503. The first suction grooves 304 on the circumference of the first suction pipe 303 and the vertical line of the belt 501 passing through the axis of the first suction pipe 303 are at an angle of 45°. The plurality of first suction grooves 304 on the first suction pipe 303 are arranged at equal intervals. In the traveling direction of the belt 501, the first suction grooves 304 on the two first suction pipes 303 in the first cleaning assembly 300 are arranged in a staggered manner.

[0040] The first cleaning assembly 300 also includes a header 301 disposed on the outer wall of one of the guard plates, and the two first suction pipes 303 are both connected to the header 301. The header 301 is connected to a first exhaust pipe 302, and the first exhaust pipe 302 is connected to the suction device.

[0041] The second cleaning component 400 is arranged at the end of the horizontal section of the conveyor belt 500, and the second cleaning component 400 includes a second suction pipe 402 arranged on the outside of the belt 501 and obliquely below the roller 502, the second suction pipe 402 is arranged parallel to the roller 502, the second suction pipe 402 is connected to the guard plate, and the second suction pipe 402 is provided with a plurality of second suction grooves 403 at equal intervals on the side of the belt 501, and a second exhaust pipe 401 connected to the second suction groove 403 is provided at a corresponding position on the outer wall of the guard plate, and the second exhaust pipe 401 is connected to the suction device.

[0042] During the transportation of polysilicon on the conveyor belt 500, the suction equipment operates to cause the first exhaust pipe 302 and the second exhaust pipe 401 to suction, the first suction groove 304 in the first cleaning component 300 to suction, the polysilicon fine material on the inner wall of the belt 501 is suctioned, the second suction groove 403 in the second cleaning component 400 suctions, and the polysilicon fine material on the outer surface of the belt 501 is suctioned, so as to prevent the fine material from adhering to the inner wall and outer surface of the belt 501.

[0043] The number of the first cleaning components 300 can be increased or decreased and can be arranged at any position of the roller 503 , and the number of the second cleaning components 400 can be increased and can be arranged at any position on the lower side of the belt 501 without interfering with material transportation.

[0044] The utility model provides a first cleaning component 300 and a second cleaning component 400 to clean the polysilicon fine material on the inner wall and the outer surface of the belt 501 respectively, so as to avoid the polysilicon fine material and the belt 501, the roller 503 and the roller shaft 502 from being worn out and causing the service life of the components to be reduced, and to avoid the non-silicon substances from mixing into the polysilicon and affecting the product quality.

[0045] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A polysilicon conveying line, characterized in that: include: case; A conveyor belt is arranged in the shell; A support frame is arranged at the bottom of the shell; A first cleaning assembly is disposed in the housing and on the inner side of the conveyor belt; A second cleaning assembly is disposed in the housing and outside the conveyor belt; Among them, the first cleaning component includes a first suction pipe arranged on the inner side of the conveyor belt and connected to the shell, and the first suction pipe is provided with a first suction groove. The second cleaning component includes a second suction pipe arranged on the outer side of the conveyor belt and connected to the shell, and the second suction pipe is provided with a second suction groove. The first suction pipe and the second suction pipe are connected to the suction device.

2. The polysilicon conveying line according to claim 1, characterized in that: The conveyor belt comprises a belt, both ends of which are respectively sleeved on two roller shafts, a plurality of rollers are rotatably arranged on the inner wall of the belt, the plurality of rollers and the two roller shafts are rotatably connected to the shell, and the roller shaft is transmission-connected to the driving source.

3. The polysilicon conveying line according to claim 2, characterized in that: The first cleaning component is arranged at the supporting roller, and the second cleaning component is arranged at the outer side of the roller shaft.

4. The polysilicon conveying line according to claim 3, characterized in that: The first cleaning assembly includes two first suction pipes arranged parallel to the roller, and the two first suction pipes are symmetrically arranged on both sides of the roller.

5. The polysilicon conveying line according to claim 4, characterized in that: The first cleaning assembly also includes a header disposed on the outer wall of the shell, the two first suction pipes are connected to the header, and the header is connected to the suction device.

6. The polysilicon conveying line according to claim 4, characterized in that: The first suction groove is arranged on the side of the first suction pipe close to the roller, and a plurality of first suction grooves are opened on the first suction pipe.

7. The polysilicon conveying line according to claim 6, characterized in that: A plurality of the first suction grooves are arranged on the first suction pipe at equal intervals, and the first suction grooves on two first suction pipes are arranged in a staggered manner in the belt traveling direction.

8. The polysilicon conveying line according to claim 6, characterized in that: The angle between the first suction groove on the circumference of the first suction pipe and a belt perpendicular line passing through the axis of the first suction pipe is 45°.

9. The polysilicon conveying line according to claim 3, characterized in that: The second suction pipe is arranged parallel to the roller shaft, the second suction pipe is arranged obliquely below the roller shaft, and a plurality of second suction grooves are arranged on the second suction pipe at equal intervals.

10. The polysilicon conveying line according to any one of claims 1 to 9, characterized in that: The shell includes two parallel guard plates, which are arranged along the layout track of the conveyor belt. A plurality of support rods are connected between the bottoms of the two guard plates, and the first suction pipe and the second suction pipe are both connected to the guard plates.

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