Guide cylinder centering tool

Abstract

The utility model provides a guide cylinder centering tool, and relates to the technical field of polycrystalline silicon. The device comprises an upper centering unit which is centered with the bottom of the water-cooling screen, a lower centering unit is centered with the top of a guide cylinder body, a locking unit is arranged on the upper centering unit, the bottom of the water-cooling screen is in a disc shape, the upper centering unit comprises a circular-ring-shaped upper positioning ring, and the lower centering unit comprises a circular-ring-shaped lower positioning ring. The lower centering unit comprises an annular lower positioning ring matched with the outer diameter of the top of the guide cylinder body, the lower positioning ring and the upper positioning ring are in a coaxial state, the locking unit locks the upper positioning ring and the bottom of the water cooling screen to achieve connection, and a plurality of stand columns are connected between the upper positioning ring and the lower positioning ring. According to the utility model, the guide cylinder body can be quickly centered through the water cooling screen.

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon, and particularly relates to an alignment tool for a draft tube. Background Art

[0002] For silicon material manufacturers, single output and cost are one of the key indicators of concern. Currently, the demand for silicon cores by major polysilicon enterprises is increasing day by day, and the process of silicon core rod materials used by polysilicon enterprises has changed from the zone melting method to the Czochralski method. This process is very mature in the photovoltaic industry. The 95-furnace, 105-furnace, and 110-furnace of the same specification and the supporting thermal field and equipment can all meet the requirements of silicon core pulling, but they can only pull the original square silicon core production process, and there is still room for improvement in terms of subsequent benefit improvement and cost issues. Since a certain amount of funds are required for the subsequent cutting process after the square silicon core is pulled, the market needs to promote the round silicon core pulling process to improve the pulling output and quality level.

[0003] For the silicon core furnaces and single crystal furnaces on the market, the main chamber furnace cover is mainly used to support and position the draft tube. However, the structure of the new Czochralski silicon core furnace developed by our company is different from the mainstream device structures on the market. The draft tube is located on the upper thermal insulation felt support ring of the main chamber. The alignment of the draft tube is generally manual, and it is difficult to accurately align the draft tube, with a large deviation, which easily causes the draft tube to block the CCD measurement and uneven temperature distribution in the furnace, having an adverse impact on the silicon core pulling process, thereby reducing the output and quality, resulting in waste of man-hours and increased costs. Content of the Utility Model

[0004] The purpose of the utility model is to develop an alignment tool for a draft tube that can quickly align the draft tube through a water-cooled screen.

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

[0006] An alignment tool for a draft tube, comprising:

[0007] An upper alignment unit that is aligned with the bottom of the water-cooled screen;

[0008] A lower alignment unit that is aligned with the top of the draft tube body;

[0009] A locking unit provided on the upper alignment unit;

[0010] Wherein, the bottom of the water-cooled screen is in a disk shape, and the upper alignment unit includes an annular upper positioning ring;

[0011] The lower alignment unit includes an annular lower positioning ring that matches the outer diameter of the top of the draft tube body, and the lower positioning ring and the upper positioning ring are in a coaxial state;

[0012] The locking unit locks the upper positioning ring and the bottom of the water-cooled screen to achieve connection, and a plurality of columns are connected between the upper positioning ring and the lower positioning ring.

[0013] Optionally, the outer diameter of the upper positioning ring is not less than the outer diameter of the bottom of the water-cooled screen.

[0014] Optionally, a plurality of through holes are formed in the upper positioning ring.

[0015] Optionally, through holes are provided at the bottom of the water-cooled screen, and the positions of the through holes correspond to those of the through holes.

[0016] Optionally, the locking unit includes at least two locking components provided on the upper positioning ring. The locking component includes a support plate connected to the bottom edge of the upper positioning ring, and a clamping plate is bolted to the support plate.

[0017] Optionally, the clamping plate includes a first horizontal portion arranged along the radial direction of the upper positioning ring. The first horizontal portion is located at the bottom of the support plate and the two are bolted together. An end portion of the first horizontal portion away from the upper positioning ring is provided with a vertical portion, and the top of the vertical portion is provided with a second horizontal portion extending in the direction of the center of the upper positioning ring. The second horizontal portion is parallel to the first horizontal portion, and the bottom of the second horizontal portion contacts the top surface of the bottom of the water-cooled screen.

[0018] Optionally, the columns are in the shape of flakes and the width gradually increases from top to bottom. The smaller end of the column is at the top and is connected to the upper positioning ring, and the larger end of the column is at the bottom and is connected to the lower positioning ring. The plurality of columns are arranged at equal intervals in the circumferential direction of the upper positioning ring and the lower positioning ring, and the projections of the columns on the upper positioning ring or the lower positioning ring are arranged along the radial direction thereof.

[0019] Optionally, the material of the tooling is polypropylene.

[0020] The beneficial effects of the present utility model are as follows:

[0021] The structure of the present utility model is simple, the cost is low, the disassembly and assembly are convenient, the centering of the draft tube body can be quickly realized, and the problem that the CCD cannot accurately measure due to the misalignment of the draft tube body during the silicon core drawing process is effectively solved. The centering working hours of the draft tube body are effectively saved and the centering accuracy is increased. The problems such as low yield of silicon core out of the core and large deviation of silicon core diameter are solved, the finished product efficiency is increased, the equipment process guarantee is provided for drawing silicon core rods within the effective time, the quantity and quality of silicon core rods are improved to a certain extent within the effective time. The locking unit arranged above the tooling can better fix the connection between the draft tube body and the water-cooled screen, avoiding the risk of the tooling falling during the centering process. The whole tooling is made of PP material and is not easy to damage the water-cooled screen. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0023] Figure 1 Structural diagram of the present utility model;

[0024] Figure 2 Structural diagram of the connection between the upper positioning ring and the bottom of the water-cooled screen;

[0025] Figure 3 Structural schematic diagram of the present utility model in the working state.

[0026] Reference numerals: 1, upper centering unit; 11, upper positioning ring; 12, through hole; 2, lower centering unit; 21, lower positioning ring; 3, locking unit; 31, support plate; 32, clamping plate; 4, column; 5, main body of the flow guide cylinder; 6, bottom of the water-cooled screen. Detailed implementation manners

[0027] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the accompanying drawings and the description are considered to be exemplary in nature rather than restrictive.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0029] The following will detail the embodiments of the present utility model with reference to the accompanying drawings.

[0030] Such as Figures 1 to 3As shown in the figure, the utility model discloses an alignment tool for a draft tube, which includes an upper alignment unit 1, a lower alignment unit 2 and a locking unit 3. The upper alignment unit 1 realizes the alignment of the tooling with the bottom 6 of the water-cooled screen, and the locking unit 3 realizes the fixed connection between the tooling and the bottom 6 of the water-cooled screen. The lower alignment unit 2 is aligned with the draft tube body 5, and finally realizes the alignment between the draft tube body 5 and the bottom 6 of the water-cooled screen.

[0031] The upper alignment unit 1 includes an upper positioning ring 11. The upper positioning ring 11 is circular and has a certain ring width. The bottom 6 of the water-cooled screen is disc-shaped. The outer diameter of the upper positioning ring 11 is not less than the outer diameter of the bottom 6 of the water-cooled screen, and the bottom 6 of the water-cooled screen is provided with a plurality of through holes.

[0032] A plurality of through holes 12 are provided on the upper positioning ring 11. The main purpose of opening the through holes 12 is to facilitate the processing, positioning, transfer, storage of the upper positioning ring 11 and reduce the weight. The positions of the through holes 12 can correspond to the positions of some of the through holes on the bottom 6 of the water-cooled screen. By aligning the through holes 12 with the through holes, it can assist the rapid alignment of the upper positioning ring 11 and the bottom 6 of the water-cooled screen.

[0033] The locking unit 3 includes two locking components provided on the upper positioning ring 11. The two locking components are located on the same radial direction of the upper positioning ring 11, and the locking components are connected to the bottom edge of the upper positioning ring 11.

[0034] The locking component includes a support plate 31 provided on the bottom edge of the upper positioning ring 11. The support plate 31 is horizontally arranged, and a clamping plate 32 is connected to the support plate 31. The clamping plate 32 is bolted to the support plate 31. The clamping plate 32 includes a first horizontal part, which is located at the bottom of the support plate 31 and is bolted to it. The first horizontal part is arranged along the radial direction of the upper positioning ring 11. The end of the first horizontal part away from the upper positioning ring 11 is provided with a vertical part, and the top of the vertical part is provided with a second horizontal part extending towards the center of the upper positioning ring 11. The second horizontal part is parallel to the first horizontal part, and the bottom of the second horizontal part contacts the top surface of the bottom 6 of the water-cooled screen.

[0035] The lower alignment unit 2 includes a lower positioning ring 21 directly below the upper positioning ring 11. The lower positioning ring 21 is coaxial with the upper positioning ring 11. The inner diameter and outer diameter of the lower positioning ring 21 are larger than those of the upper positioning ring 11. The inner diameter of the lower positioning ring 21 is adapted to the outer diameter of the top of the draft tube body 5. The lower positioning ring 21 has a larger thickness and a very small ring width. Compared with the upper positioning ring 11, the lower positioning ring 21 has an increased thickness and a reduced ring width. Four columns 4 are provided between the lower positioning ring 21 and the upper positioning ring 11, and the connection between the upper positioning ring 11 and the lower positioning ring 21 is realized through the four columns 4.

[0036] The column 4 is sheet-shaped and its width gradually increases from top to bottom. The smaller end of the column 4 is at the top and is connected to the upper positioning ring 11, and the larger end of the column 4 is at the bottom and is connected to the lower positioning ring 21. The four columns 4 are arranged at equal intervals in the circumferential direction of the upper positioning ring 11 and the lower positioning ring 21. The positional relationship between the upper positioning ring 11 and the lower positioning ring 21 is similar to the top surface and the bottom surface of a frustum of a cone, and the columns 4 are arranged along the generatrix of the frustum of the cone, that is, the projection of the column 4 on the upper positioning ring 11 or the lower positioning ring 21 is arranged along its radial direction.

[0037] The entire tooling is mainly made of polypropylene (PP) material, making its quality smaller, not easily damaging the bottom 6 of the water-cooled screen, and also avoiding polluting the hot field components of the silicon core furnace and the silicon material.

[0038] When carrying out the centering work, the lower positioning ring 21 is connected to the guide cylinder body 5, and the guide cylinder body 5 is positioned with the lower positioning ring 21. The upper positioning ring 11 is centered with the bottom 6 of the water-cooled screen and fixed by the locking unit 3. During centering, if the through hole 12 corresponds to the position of some through holes, the upper positioning ring 11 and the bottom 6 of the water-cooled screen can be quickly aligned by aligning the through hole 12 with the through hole. After the upper positioning ring 11 and the bottom 6 of the water-cooled screen are coaxial, the locking unit 3 is used to fix the upper positioning ring 11 and the bottom 6 of the water-cooled screen. The clamping plate 32 is inserted laterally, so that the first horizontal part of the clamping plate 32 contacts the support plate 31, and the second horizontal part contacts the top surface of the bottom 6 of the water-cooled screen. Then the first horizontal part and the support plate 31 are bolted to achieve fixation. At this time, the tooling is positioned and fixedly connected to the bottom 6 of the water-cooled screen. By the above method, the tooling is connected to the lifting structure of the bottom 6 of the water-cooled screen, achieving the effect of improving the centering accuracy of the guide cylinder body 5.

[0039] The structure of the utility model is simple, with low cost and convenient disassembly and assembly. It can quickly achieve the centering of the guide cylinder body 5, effectively solve the problem that the CCD cannot accurately measure caused by the misalignment of the guide cylinder body 5 during the silicon core drawing process, effectively save the centering working hours of the guide cylinder body 5 and increase the centering accuracy, solve the problems such as low yield of silicon core out-core and large deviation of silicon core diameter, increase the finished product efficiency, provide equipment process guarantee for drawing silicon core rods within the effective time, and the quantity and quality of silicon core rods are improved to a certain extent within the effective time. The locking unit 3 arranged above the tooling can better fix the connection between the guide cylinder body 5 and the bottom 6 of the water-cooled screen, avoiding the risk of the tooling falling during the centering process. The whole tooling is made of PP material and is not easily damaged to the bottom 6 of the water-cooled screen.

[0040] The above embodiments are only the preferred embodiments of the utility model, and do not limit the technical solutions of the utility model. As long as the technical solutions that can be achieved on the basis of the above embodiments without creative labor shall be regarded as falling within the scope of the patent rights of the utility model.

Claims

1. A guide tube centering tool, characterized in that: include: The upper centering unit is aligned with the bottom of the water cooling screen; The lower centering unit is aligned with the top of the guide tube body; A locking unit, arranged on the upper centering unit; Wherein, the bottom of the water-cooling screen is in a disc shape, and the upper centering unit includes an upper positioning ring in a circular shape; The lower centering unit comprises an annular lower positioning ring matched with the outer diameter of the top of the guide tube body, and the lower positioning ring is coaxial with the upper positioning ring; The locking unit locks the upper positioning ring and the bottom of the water cooling screen to achieve connection, and a plurality of columns are connected between the upper positioning ring and the lower positioning ring.

2. The guide tube centering tool according to claim 1, characterized in that: The outer diameter of the upper positioning ring is not less than the outer diameter of the bottom of the water cooling screen.

3. The guide tube centering tool according to claim 2, characterized in that: The upper positioning ring is provided with a plurality of through holes.

4. The guide tube centering tool according to claim 3, characterized in that: A through hole is provided at the bottom of the water cooling screen, and the position of the through hole corresponds to the through hole.

5. The guide tube centering tool according to any one of claims 1 to 4, characterized in that: The locking unit comprises at least two locking assemblies arranged on the upper positioning ring, and the locking assembly comprises a support plate connected to the bottom edge of the upper positioning ring, and a clamping plate is bolted to the support plate.

6. The guide tube centering tool according to claim 5, characterized in that: The clamping plate includes a first horizontal portion radially arranged along the upper positioning ring, the first horizontal portion is located at the bottom of the support plate and the two are bolted together, a vertical portion is provided at the end of the first horizontal portion away from the upper positioning ring, a second horizontal portion extending toward the center of the upper positioning ring is provided at the top of the vertical portion, the second horizontal portion is parallel to the first horizontal portion, and the bottom of the second horizontal portion contacts the top surface of the bottom of the water cooling screen.

7. The guide tube centering tool according to any one of claims 1 to 4, characterized in that: The pillars are in sheet shape and their width increases gradually from top to bottom. The smaller end of the pillar is at the top and connected to the upper positioning ring, and the larger end of the pillar is at the bottom and connected to the lower positioning ring. Multiple pillars are arranged at equal intervals in the circumferential direction of the upper positioning ring and the lower positioning ring, and the projections of the pillars on the upper positioning ring or the lower positioning ring are arranged along its radial direction.

8. The guide tube centering tool according to any one of claims 1 to 4, characterized in that: The tooling is made of polypropylene.

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