CN210385958U

CN210385958U - Polycrystalline silicon extrusion crushing device

Info

Publication number: CN210385958U
Application number: CN201920274570.8U
Authority: CN
Inventors: 吴德智; 陈壮; 刘芳; 霍福科
Original assignee: Jiangsu Zhongneng Polysilicon Technology Development Co ltd
Current assignee: Jiangsu Zhongneng Polysilicon Technology Development Co ltd
Priority date: 2019-03-05
Filing date: 2019-03-05
Publication date: 2020-04-24
Anticipated expiration: 2029-03-05

Abstract

The utility model discloses a device capable of realizing direct extrusion crushing of a polysilicon rod, which comprises a host, a hydraulic system and an electric operation box; the main machine comprises a main frame, a hydraulic cylinder arranged at the front end of the main frame, a piston rod arranged in the hydraulic cylinder, a sliding block connected with the piston rod, a metal die with prismatic teeth connected with one side of the movable sliding block, a fixed end and a sieve rod; the electric operation box and the hydraulic system control the slide block to operate and extrude the silicon rod to complete crushing, the crushed small-size silicon blocks enter the screening machine to be screened and packaged, and the large-size silicon blocks are secondarily crushed. The utility model discloses simple structure, it is high-efficient, thereby tungsten cobalt carbide alloy mould and prismatic tooth design have reduced the area of contact of silicon piece and alloy mould and have reduced the introduction of impurity, have solved the broken problem that introduces impurity is higher and produce the farine many of traditional machinery.

Description

Polycrystalline silicon extrusion crushing device

Technical Field

The utility model relates to a polycrystalline silicon preparation technical field, specificly relate to a polycrystalline silicon breaker.

Background

With the development of the photovoltaic industry in China, the capacity of polycrystalline silicon is continuously increased, 50 million tons of polycrystalline silicon is broken through in 2018, and the mainstream polycrystalline silicon production method is an improved Siemens method, so that the produced polycrystalline silicon is in a round rod shape, the hardness of the polycrystalline silicon is high, and the requirement on quality is strict, so that the polycrystalline silicon crushing technology is a difficult problem in the industry all the time. At present, the mainstream polysilicon crushing technology in China is manual hammer knocking crushing, mechanical crushing and temperature difference crushing are adopted, and the silicon rod crushing modes are uniform and have a certain defect.

The manual crushing mode needs a large amount of labor, the crushed silicon powder affects the health of a human body, and the crushing of small-particle silicon blocks cannot be completed; the crushing mode of the mechanical double-roller type crushing device is simple and efficient, but the selected alloy roller can be continuously consumed to pollute the silicon material; the method needs to consume huge heat source and cold source, and the automatic crushing is only automatic cracking, and secondary crushing is needed to obtain normal size.

Patent CN 108686754A discloses a mechanical crushing device, utilizes a pair of motor to drive a pair of roller teeth and moves in opposite directions, carries out the interlock breakage to silicon material, and the roller tooth adopts carbide, and this mechanical crushing equipment is simple, crushing efficiency is high but has the requirement to the pan feeding size, can produce a large amount of farine moreover, and silicon material loss is serious.

Patent CN 102489372A discloses a temperature difference crushing method, which uses microwave as a heat source to heat a polysilicon rod to 400-1100 ℃, and then the polysilicon rod enters a quenching cooling chamber to obtain an instant stress to realize automatic crushing.

Patent CN 205361598U discloses a broken system of high-pressure pulse formula polycrystalline silicon rod, puts into the broken container that is equipped with deionized water silicon rod, then produces high-pressure pulse through impulse generator, breaks the silicon rod in the container, then gets into the shale shaker and selects the platform and finally gets into drying system, and this method has realized the automatic breakage and the screening of silicon rod, but equipment is expensive and crushing inefficiency, and the material of the pulse electrode who uses is the carbon steel, can produce the pollution to the silicon material.

Disclosure of Invention

In order to solve the problem, the utility model discloses a polycrystalline silicon material breaker utilizes hydraulic means to drive slider and mould and extrudees the breakage to the silicon rod, this device simple structure, and crushing efficiency is high, broken size is adjustable, broken back impurity content is low and the little advantage of silica powder that produces.

Based on the utility model discloses, a broken device of polycrystalline silicon extrusion is provided, including host computer, electrical operation case and hydraulic system triplex, its characterized in that, the host computer includes the main frame, install in the pneumatic cylinder of main frame front end, set up in the piston rod of pneumatic cylinder, the slider of being connected with the piston rod, remove slider one side and have metal mold, stiff end, the sieve pole that has the prism tooth.

The polycrystalline silicon extrusion crushing device is characterized in that the alloy die comprises prismatic teeth, and the alloy die is made of tungsten-cobalt hard alloy.

The polycrystalline silicon extrusion crushing device is characterized in that the outer part of the alloy die is a cuboid, one side of the alloy die combined with the sliding block is provided with a groove, the alloy die can be conveniently sleeved on the sliding block, the side surface of the alloy die is not provided with prismatic teeth, and the alloy die is fixed on the sliding block through metal screws.

The polycrystalline silicon extrusion crushing device is characterized in that prismatic teeth are uniformly distributed at the front end of an alloy die, and the number of the prismatic teeth is 1-25/square decimeter, preferably 10-20/square decimeter; the front end of the prism teeth is spherical, wherein the prism teeth and the mould are of an integral structure or a combined structure, but the integral structure is preferred.

The polycrystalline silicon extrusion crushing device is characterized in that the sieve rod is arranged on the bracket at the lower part of the sliding block and is not contacted with the sliding block, the sieve rod is made of stainless steel or carbon steel, and polyurethane is poured outside; the spacing between the sieve rods is 30-120mm, preferably 40-90 mm; the number of screen bars is between 2 and 15, preferably between 3 and 10.

The polycrystalline silicon extrusion crushing device is characterized in that the running speed of the sliding block during primary extrusion crushing can be controlled to be 20-80mm/s, the running speed of the sliding block during secondary extrusion crushing can be controlled to be 20-50mm/s, and the running speed of the sliding block during return stroke can be controlled to be 50-120 mm/s.

Polycrystalline silicon extrusion breaker, its characterized in that, the silicon material width after the extrusion breakage is less than can leak the sieve pole of sieve pole interval and enter into the screening process, the width is greater than can carry out the secondary extrusion breakage of sieve pole interval.

The polycrystalline silicon extrusion crushing device is characterized in that one side of the fixed end, which corresponds to the sliding block, is an alloy die with prismatic teeth.

The polycrystalline silicon extrusion crushing device is characterized in that a hydraulic system comprises an electro-hydraulic proportional overflow speed regulating valve, an electro-hydraulic reversing valve and a one-way valve, and the current of the electro-hydraulic proportional speed regulating valve can be regulated as required to control the running speed of a sliding block, so that variable-speed extrusion is realized.

The polycrystalline silicon extrusion crushing device is characterized in that the running speed of the sliding block during one-time pressing can be controlled to be 20-80mm/s, and preferably 30-60 mm/s; the running speed of the secondary pressing can be controlled to be 20-50mm/s, preferably 30-40 mm/s; the running speed during the return stroke can be controlled to be 50-120mm/s, and preferably 60-100 mm/s.

Polycrystalline silicon extrusion breaker, its characterized in that, the silicon material width after the extrusion breakage is less than can leak the sieve pole and enter into the screening process of sieve pole interval, the width is greater than can carry out the secondary extrusion breakage of sieve pole interval.

Compared with the prior art, the utility model has the advantages of direct crushing of the polysilicon rod, low crushing cost and high efficiency; the size of the crushed silicon material can be adjusted according to the speed of the slide block; the design of the tungsten-cobalt-containing hard alloy prismatic tooth has the advantages of reducing the contact area and reducing the introduction of impurities and the generation of silicon fine powder during crushing.

Drawings

Fig. 1 is a schematic structural diagram of the crushing device of the present invention.

The device comprises a main frame 1, an electric operation box 2, a hydraulic system 3, a hydraulic cylinder 4, a piston rod 5, a metal screw 6, a sliding block 7, an alloy die 8, a prism tooth 9, a sieve rod 10, a fixed end 11, a sieve rod 12, a sieve rod 13 and a metal screw 14.

FIG. 2 is a top view of the slider and alloy die assembly.

FIG. 3 is a side view of the slider and alloy die assembly.

Detailed Description

In the following, the technical solutions in the embodiments of the present invention are clearly and completely described with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, those skilled in the art can implement all other embodiments without creative changes, and all other embodiments belong to the protection scope of the present invention.

Fig. 1 is a specific embodiment of the present invention, the polysilicon crushing apparatus includes a main frame, an electrical operation box 2, and a hydraulic system 3, wherein the main frame includes a main frame 1, a hydraulic cylinder 4, a piston rod 5, a metal screw 6, a slider 7, an alloy mold 8, a prismatic tooth 9, a sieve rod 10, a fixed end 11, a sieve rod 12, a sieve rod 13, and a metal screw 14; the piston rod 5 and the sliding block 7 are fixed through a metal screw 6, and the sliding block 7 and the alloy die 8 are fixed through a metal screw 14.

A polycrystalline silicon rod is placed between a sliding block 7 and a fixed end 11 of the device through an automatic feeding system, a piston rod 5 in a hydraulic cylinder 4 is pushed to drive the sliding block 7 to move forward or backward under the control of an electric control box 2 and a hydraulic system 3, and polycrystalline silicon is extruded and crushed by prism teeth between the movable sliding block 7 and the fixed end 11; the operation speed of the sliding block is controlled through a set program, the silicon material with the width smaller than the width L of the sieve rod directly falls through the gaps among the sieve rod 10, the sieve rod 12 and the sieve rod 13 and enters the linear sieving machine for sieving and packaging, the silicon material with the width larger than the width L of the sieve rod is crushed by secondary extrusion, the silicon rod is continuously put into the linear sieving machine after the secondary crushing for repeating the operation, after the primary crushing, the silicon blocks staying on the upper parts of the sieve rod 10, the sieve rod 12 and the sieve rod 13 account for 10-20% of the mass before the crushing, and after the secondary crushing, all the polysilicon is crushed and falls into the linear sieving machine for sieving.

In the embodiment, the number of the prism teeth uniformly distributed at the front end of the die is 10/square decimeter, the running speed of the slide block during primary pressing is 40mm/s, the running speed of the slide block during secondary pressing is 30mm/s, and the running speed of the slide block during return stroke is 60 mm/s. The distance L =40mm between the screen bars 10, 12, 13.

Although the embodiments of the present invention have been described and illustrated in detail with reference to the accompanying drawings, it is to be understood that various equivalent changes and modifications can be made therein by those skilled in the art according to the concept of the present invention, and that the functional effects thereof are within the scope of the present invention without departing from the spirit of the present invention.

Claims

1. The utility model provides a polycrystalline silicon extrusion breaker, includes host computer, electric operating box and hydraulic system triplex, its characterized in that, the host computer includes the main frame, installs in the pneumatic cylinder of main frame front end, sets up in the piston rod of pneumatic cylinder, the slider of being connected with the piston rod, moves the metal mold that slider one side has the prism tooth, stiff end and sieve pole.

2. The polysilicon crushing device according to claim 1, wherein: the alloy die contains prismatic teeth.

3. The polysilicon crushing device according to claim 1, wherein: the alloy mold is made of tungsten-cobalt hard alloy.

4. The polysilicon crushing device according to claim 2, wherein: the alloy mould is cuboid and sleeved on the sliding block, the side surface of the alloy mould is not provided with prismatic teeth, and the alloy mould is fixed on the sliding block through a metal screw.

5. The polysilicon crushing device according to claim 2, wherein: the prism teeth and the alloy die are of an integral structure, the prism teeth are uniformly distributed at the front end of the alloy die, the front end of each prism tooth is spherical, and the number of the prism teeth is 1-25 per square decimeter.

6. The polysilicon crushing device according to claim 1, wherein: the sieve rods are arranged on the bracket at the lower part of the sliding block and are not contacted with the sliding block, polyurethane materials are poured outside the sieve rods, and the distance between the sieve rods is 30-120 mm.

7. The polysilicon crushing device according to claim 1, wherein: the running speed of the slide block during primary extrusion crushing can be controlled to be 20-80mm/s, the running speed of the slide block during secondary extrusion crushing can be controlled to be 20-50mm/s, and the running speed of the slide block during return stroke can be controlled to be 50-120 mm/s.

8. The polysilicon crushing device according to claim 1, wherein: the width of the crushed silicon material is smaller than the distance between the sieve rods, the sieve rods can be leaked and sieved, and the crushed silicon material is subjected to secondary extrusion crushing when the width of the crushed silicon material is larger than the distance between the sieve rods.

9. The polysilicon crushing device according to claim 1, wherein: one side of the fixed end, which corresponds to the sliding block, is provided with an alloy die with prismatic teeth, and the alloy die is fixed on the fixed end through a metal screw.