Monocrystalline silicon thermal field guide cylinder fixing device

Abstract

The utility model provides a monocrystalline silicon thermal field guide cylinder fixing device, and relates to the technical field of monocrystalline silicon. The fixing device comprises a cubic adapter, an upper connecting component and a lower connecting component are respectively arranged at the upper part and the lower part of the adapter, the fixing device is arranged between a guide cylinder and a water-cooling screen frame of the single crystal furnace, the upper connecting component is detachably connected with the water-cooling screen frame, and the lower connecting component is detachably connected with the guide cylinder; the upper connecting assembly comprises an upper connecting rod in threaded connection with the top of the adapter, and the top end of the upper connecting rod is in threaded connection with an upper force bearing block. And the lower connecting assembly comprises a lower connecting rod which is in threaded connection with the bottom of the adapter. The relative position change of the guide cylinder and the water cooling screen in the repeated lifting process is avoided, and the inaccurate measurement of the liquid opening distance is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of single crystal silicon, in particular to a single crystal silicon thermal field guide tube fixing device. Background Art

[0002] Solar energy is an ideal clean energy. The development of the photovoltaic industry is of great significance for adjusting the energy structure, promoting changes in energy production and consumption methods, and promoting the construction of ecological civilization. Monocrystalline silicon, as a highly ordered crystalline material, is an indispensable key raw material in the photovoltaic industry.

[0003] At present, the production of single crystal silicon adopts the direct pulling method with continuous multiple feeding. The lower part of the direct pulling method is fixed, and the upper part is a guide tube structure that can be raised and lowered. Before each feeding, the single crystal furnace will lift the thermal field guide tube, and then lower the guide tube again after the feeding. However, the guide tube lacks better fixing measures. During the furnace closing process, the guide tube has a certain degree of mobility, which makes the guide tube and the water cooling screen have uncertain gaps and position deviations, resulting in changes in the position of the guide tube relative to the liquid surface of the single crystal silicon, which in turn causes deviations in the relative liquid mouth distance measurement position, causing inaccurate liquid mouth distance measurement problems, and inaccurate liquid mouth distance measurement. In turn, the stable temperature gradient changes, the thermal field is unstable, and the instability of the thermal field leads to the failure of the single crystal parameters, which in turn causes problems such as increased line breaks and inefficiency in the production of single crystal silicon. Utility Model Content

[0004] The utility model aims to develop a single crystal silicon thermal field guide tube fixing device which can avoid relative position change between the guide tube and the water cooling screen during repeated lifting and lowering and avoid inaccurate measurement of liquid port distance.

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

[0006] A single crystal silicon thermal field guide tube fixing device, comprising:

[0007] Cube-shaped adapter;

[0008] An upper connecting assembly is arranged on the upper part of the adapter;

[0009] A lower connecting assembly is provided at the lower part of the adapter;

[0010] The fixing device is arranged between the guide tube and the water-cooling screen frame of the single crystal furnace, the upper connecting assembly is detachably connected to the water-cooling screen frame, and the lower connecting assembly is detachably connected to the guide tube;

[0011] The upper connecting assembly comprises an upper connecting rod threadedly connected to the top of the adapter, and the top end of the upper connecting rod is threadedly connected to an upper bearing block;

[0012] The lower connecting assembly includes a lower connecting rod threadably connected to the bottom of the adapter.

[0013] Optionally, the water-cooling screen frame is provided with a through hole for the upper connecting rod to pass through, and the upper bearing block is located at the upper part of the water-cooling screen frame.

[0014] Optionally, a screw hole is provided at the top of the adapter, and an end of the upper connecting rod away from the upper bearing block is provided with an external thread that cooperates with the screw hole at the top of the adapter.

[0015] Optionally, the upper bearing block includes a wide portion and a narrow portion in an integrated structure, a screw hole is provided on the wide portion, and an end of the upper connecting rod away from the adapter is provided with an external thread that matches the screw hole thread on the wide portion.

[0016] Optionally, the wide portion is in a truncated cone shape, the smaller end of the wide portion is connected to the narrow portion, the narrow portion is in a regular hexagonal prism shape coaxial with the wide portion, and the screw hole opened on the wide portion is opened inward from the center of the wide portion.

[0017] Optionally, a pin flat section is provided in the middle of the upper connecting rod, and two grooves are symmetrically provided on the upper connecting rod of the pin flat section, and the two grooves have planes parallel to each other.

[0018] Optionally, the lower connecting rod includes a thin section and a thick section that are coaxially connected, and the guide cylinder is provided with a through hole for the thin section of the lower connecting rod to pass through.

[0019] Optionally, an end of the thin section away from the thick section is provided with an external thread, a screw hole matching the external thread of the end of the thin section is provided at the bottom of the adapter, and a slot is provided at the end of the thick section.

[0020] Optionally, the adapter and the lower connecting rod are made of 310S stainless steel.

[0021] Optionally, the upper connecting rod and the upper bearing block are made of 316L stainless steel or 310S stainless steel.

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

[0023] The utility model has a simple structure and low production and use costs, and the guide tube body and the water-cooling screen frame are detachably connected, which not only makes the position between the guide tube body and the water-cooling screen frame adjustable, but also forms a stable connection between the guide tube body and the water-cooling screen frame, thereby avoiding the relative position change between the guide tube body and the water-cooling screen frame during repeated lifting and lowering, so that there is no uncertain gap and position deviation between the guide tube body and the water-cooling screen frame, avoiding the problem of inaccurate liquid outlet distance measurement caused by the deviation of the relative liquid outlet distance measurement position, and further avoiding the occurrence of thermal field instability. 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 is a schematic diagram of the structure of the fixing device;

[0027] Figure 3 for Figure 2 Left view of

[0028] Figure numerals: 100, water-cooling screen frame; 200, guide tube body; 300, fixing device body; 301, adapter; 302, upper connecting rod; 303, pin flat section; 304, narrow part; 305, wide part; 306, thin section; 307, thick section; 308, slot. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0032] like Figures 1 to 3As shown, the utility model discloses a single crystal silicon thermal field guide tube fixing device, the fixing device body 300 is arranged between the guide tube body 200 of the single crystal furnace and the water-cooled screen frame 100, the fixing device body 300 includes an adapter 301, the adapter 301 is cubical, and screw holes are respectively provided on the top and bottom of the adapter 301.

[0033] The upper and lower parts of the adapter 301 are respectively threadedly connected with an upper connecting component and a lower connecting component. The upper connecting component is connected to the water-cooled screen frame 100 of the single crystal furnace, and the lower connecting component is connected to the guide tube body 200.

[0034] The upper connection assembly includes an upper connection rod 302 and an upper bearing block. The upper connection rod 302 is threadedly connected to the adapter 301 and the upper bearing block.

[0035] The upper bearing block includes a wide portion 305 and a narrow portion 304 which are an integral structure. The wide portion 305 is in a truncated cone shape. The smaller end of the wide portion 305 is connected to the narrow portion 304. The narrow portion 304 is in a regular hexagonal prism shape coaxial with the wide portion 305. The narrow portion 304 is a nut structure. A screw hole is provided on the upper bearing block, and the screw hole is opened inward from the center of the wide portion 305.

[0036] The upper connecting rod 302 has external threads at both ends, and a pin flat section 303 is provided in the middle of the upper connecting rod 302. Two grooves are symmetrically provided on the upper connecting rod 302 of the pin flat section 303, and the two grooves have parallel planes. The pin flat section 303 can be screwed with a wrench or other tools to realize the rotation of the upper connecting rod 302. One end of the upper connecting rod 302 is threadedly connected to the top of the adapter 301, and the other end of the upper connecting rod 302 is threadedly connected to the screw hole of the upper bearing block.

[0037] The lower connecting assembly includes a lower connecting rod, which includes a coaxially connected cylindrical thin section 306 and thick section 307. The outer diameter of the thick section 307 is larger than that of the thin section 306. A groove 308 is formed at the bottom of the thick section 307. An external thread is provided at the end of the thin section 306 away from the thick section 307. The end of the thin section 306 is threadedly connected to the screw hole at the bottom of the adapter 301.

[0038] The adapter 301 is made of 310S stainless steel, the upper connecting rod 302 and the upper bearing block are made of 316L stainless steel or 310S stainless steel, and the lower connecting rod is made of 310S stainless steel.

[0039] When connecting the guide tube body 200 and the water-cooled screen frame 100, the adapter 301 is located between the guide tube body 200 and the water-cooled screen frame 100, and the thin section 306 of the lower connecting rod passes through the through hole pre-opened on the guide tube body 200 from bottom to top, and the thick section 307 cannot pass through the through hole. Use a tool to screw the lower connecting rod through the slot 308 at the bottom end of the lower connecting rod, so that the lower connecting rod is threadedly connected to the screw hole at the bottom of the adapter 301, and the upper connecting rod 302 is passed through the through hole pre-opened on the water-cooled screen frame 100, so that the bottom end of the upper connecting rod 302 is threadedly connected to the screw hole at the top of the adapter 301, and the top end of the upper connecting rod 302 extends out of the top of the water-cooled screen frame 100, and the upper bearing block is screwed to be threadedly connected to the top end of the upper connecting rod 302, and the wide part 305 of the upper bearing block is in contact with the water-cooled screen frame 100.

[0040] The utility model has a simple structure and low production and use costs, and the guide tube body 200 and the water-cooled screen frame 100 are detachably connected, which not only makes the position between the guide tube body 200 and the water-cooled screen frame 100 adjustable, but also forms a stable connection between the guide tube body 200 and the water-cooled screen frame 100, thereby avoiding the relative position change between the guide tube body 200 and the water-cooled screen frame 100 during repeated lifting and lowering, so that there is no uncertain gap and position deviation between the guide tube body 200 and the water-cooled screen frame 100, avoiding the problem of inaccurate liquid outlet distance measurement caused by the deviation of the relative liquid outlet distance measurement position, and further avoiding the occurrence of thermal field instability.

[0041] 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 single crystal silicon thermal field guide tube fixing device, characterized in that: include: Cube-shaped adapter; An upper connecting assembly is arranged on the upper part of the adapter; A lower connecting assembly is provided at the lower part of the adapter; The fixing device is arranged between the guide tube and the water-cooling screen frame of the single crystal furnace, the upper connecting assembly is detachably connected to the water-cooling screen frame, and the lower connecting assembly is detachably connected to the guide tube; The upper connecting assembly comprises an upper connecting rod threadedly connected to the top of the adapter, and the top end of the upper connecting rod is threadedly connected to an upper bearing block; The lower connecting assembly includes a lower connecting rod threadably connected to the bottom of the adapter.

2. The single crystal silicon thermal field guide tube fixing device according to claim 1, characterized in that: The water-cooling screen frame is provided with a through hole for the upper connecting rod to pass through, and the upper bearing block is located at the upper part of the water-cooling screen frame.

3. The single crystal silicon thermal field guide tube fixing device according to claim 2, characterized in that: The top of the adapter is provided with a screw hole, and the end of the upper connecting rod away from the upper bearing block is provided with an external thread that matches the screw hole at the top of the adapter.

4. The single crystal silicon thermal field guide tube fixing device according to claim 3, characterized in that: The upper bearing block comprises a wide portion and a narrow portion in an integral structure, a screw hole is provided on the wide portion, and an end of the upper connecting rod away from the adapter is provided with an external thread that matches with the screw hole thread on the wide portion.

5. The single crystal silicon thermal field guide tube fixing device according to claim 4, characterized in that: The wide part is in a truncated cone shape, the smaller end of the wide part is connected to the narrow part, the narrow part is in a regular hexagonal prism shape coaxial with the wide part, and the screw hole opened on the wide part is opened inward from the center of the wide part.

6. The single crystal silicon thermal field guide tube fixing device according to claim 5, characterized in that: A pin flat section is provided in the middle of the upper connecting rod, and two grooves are symmetrically provided on the upper connecting rod of the pin flat section, and the two grooves have planes parallel to each other.

7. The single crystal silicon thermal field guide tube fixing device according to claim 1, characterized in that: The lower connecting rod comprises a thin section and a thick section which are coaxially connected, and the guide cylinder is provided with a through hole for the thin section of the lower connecting rod to pass through.

8. The single crystal silicon thermal field guide tube fixing device according to claim 7, characterized in that: The end of the thin section away from the thick section is provided with an external thread, the bottom of the adapter is provided with a screw hole matched with the external thread of the end of the thin section, and the end of the thick section is provided with a slot.

9. The single crystal silicon thermal field guide tube fixing device according to any one of claims 1 to 8, characterized in that: The adapter and the lower connecting rod are made of 310S stainless steel.

10. The single crystal silicon thermal field guide tube fixing device according to any one of claims 1 to 8, characterized in that: The upper connecting rod and the upper bearing block are made of 316L stainless steel or 310S stainless steel.

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