Automatic feeding device for producing single crystal by Czochralski method

Abstract

The utility model discloses an automatic feeding device for producing single crystals by a czochralski method, which particularly relates to the field of monocrystalline silicon production and comprises a transition barrel, a conical cap arranged at the top of the transition barrel, a feeding pipe arranged on the surface of the transition barrel, a blanking barrel arranged at the bottom of the transition barrel, a blanking port arranged at the bottom of the blanking barrel and a control mechanism arranged in an inner cavity of the transition barrel. The control mechanism is arranged, the vertical rod and the piston at the bottom of the vertical rod can be driven by the electromagnet block to move upwards in parallel, the automatic feeding function is achieved, and the automatic feeding device has the advantage of being easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of single crystal silicon production, and more specifically, to an automatic feeding device for producing single crystals by a Czochralski method. Background Art

[0002] Monocrystalline silicon material is one of the main raw materials for solar panels in the photovoltaic industry. It is also the raw material for the processing and manufacturing of semiconductor chips and wafers. It is an indispensable part of the green energy and semiconductor industries. Nowadays, most single crystal furnaces use the method of feeding the quartz crucible at one time, and then produce single crystal silicon through a vertical pulling single crystal furnace.

[0003] The utility model patent with patent application publication number CN201921850339.5 discloses an automatic feeding device for a single crystal furnace, including a support rod, a base, a feeding device and a control device. The lower end face of the support rod is fixed to the upper end face of the middle part of the base. The feeding device is located on the right side of the support rod. The feeding device is connected to the control device through an electric wire, and also includes a vertical screw rod and a servo motor. The feeding device includes a storage device and a feeding device. The storage device is divided into a feeding area, a grinding area, and a discharging area from top to bottom. The advantage of this structure is that it is simple to use, convenient for feeding, and does not affect the production and manufacturing of single crystal silicon.

[0004] However, in actual use, since the structure lacks a control mechanism, not only does it need to be manually added when adding materials, but it is also difficult to control the amount, which is very inconvenient. Utility Model Content

[0005] In order to overcome the above defects of the prior art, the utility model provides an automatic feeding device for producing single crystals by the Czochralski method to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic feeding device for producing single crystals by the direct pulling method, comprising a transition tube, a conical cap is arranged on the top of the transition tube, a feeding pipe is arranged on the surface of the transition tube, a unloading tube is arranged on the bottom of the transition tube, a unloading port is arranged on the bottom of the unloading tube, and a control mechanism is arranged in the inner cavity of the transition tube; the control mechanism comprises a limit plate fixedly arranged in the inner cavity of the transition tube, a vertical rod is movably sleeved inside the limit plate, a spring is sleeved on the surface of the vertical rod, the spring is located at the bottom of the limit plate, a magnetic block is fixedly arranged on the top of the vertical rod, the magnetic block is located above the limit plate, a piston is fixedly arranged on the bottom of the vertical rod, and the piston is parallel to the feeding pipe; the conical cap is arranged in a cone shape, and an electromagnet block is fixedly arranged on the top of the inner cavity of the conical cap. The above-mentioned technical solution is adopted to realize the function of automatic unloading.

[0007] Preferably, a plurality of limit rods are evenly distributed on the bottom of the cone cap, and a sealing cover is fixedly provided on the bottom of the cone cap; a third fixed ring is fixedly provided on the top of the transition tube, and a plurality of first through holes are evenly distributed on the surface of the third fixed ring, and the inner diameters of the plurality of first through holes are all adapted to the outer diameter of the limit rods, and the transition tube and the cone cap are detachably connected by plugging the limit rods and the first through holes. The above technical solution is adopted to facilitate the disassembly and installation of the transition tube and the cone cap.

[0008] Preferably, a first fixing ring is fixedly provided at the bottom of the transition cylinder, and a second fixing ring is fixedly provided at the top of the lower cylinder. A plurality of second through holes are provided on the surfaces of the second fixing ring and the first fixing ring. The second fixing ring is detachably connected to the first fixing ring by bolts passing through the second through holes. The above technical solution is adopted to facilitate the disassembly and installation of the lower cylinder and the transition cylinder.

[0009] Technical effects and advantages of the utility model:

[0010] 1. By setting a control mechanism, when feeding is needed, firstly, the external power supply of the electromagnet block is connected to make the electromagnet block magnetic so that the magnetic suction block can be adsorbed, and at the same time, the magnetic suction block drives the vertical rod and the piston at the bottom of the vertical rod to move upward in parallel. At this time, the position of the piston is higher than the horizontal line of the feed pipe, and the raw materials can automatically enter the interior of the transition cylinder through the feed pipe. When it is necessary to stop feeding, the external power supply of the electromagnet block is disconnected to make the electromagnet block lose its magnetism. At the same time, the spring restores its own elasticity, pushing the piston to move downward in parallel so that the piston and the feed pipe are at the same horizontal line, so that the piston can block the feed pipe. Compared with the prior art, the structure is characterized in that it can realize the function of automatic feeding and has the advantage of simple operation;

[0011] 2. By setting a limit rod, a third fixed ring, a first fixed ring and a second fixed ring, when the lower barrel, the transition barrel and the cone cap need to be damaged and need to be replaced, they can be disassembled and replaced individually by removing the bolts. Compared with the prior art, the feature of this device is that it can be easily disassembled and replaced individually, effectively avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the cone cap of the utility model.

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the transition tube of the present utility model.

[0015] Figure 4 It is a schematic diagram of the structure of the feeding barrel of the utility model.

[0016] Figure 5 For this utility model Figure 3 A schematic diagram of the enlarged structure in the middle.

[0017] The accompanying drawings are marked as follows: 1. discharge barrel; 2. discharge port; 3. first fixed collar; 4. second fixed collar; 5. transition barrel; 6. feed pipe; 7. cone cap; 8. electromagnet block; 9. limit rod; 10. sealing cover; 11. first through hole; 12. third fixed collar; 13. limit plate; 14. piston; 15. magnetic block; 16. second through hole; 17. vertical rod; 18. spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] As attached Figure 1-5 The automatic feeding device for producing single crystal by the straight pulling method shown in the figure comprises a transition tube 5, a cone cap 7 is arranged on the top of the transition tube 5, a feed pipe 6 is arranged on the surface of the transition tube 5, a discharge tube 1 is arranged at the bottom of the transition tube 5, a discharge port 2 is arranged at the bottom of the discharge tube 1, and a control mechanism is arranged in the inner cavity of the transition tube 5; the control mechanism comprises a limit plate 13 fixedly arranged in the inner cavity of the transition tube 5, a vertical rod 17 is movably sleeved inside the limit plate 13, a spring 18 is sleeved on the surface of the vertical rod 17, and the spring 18 is located at the bottom of the limit plate 13, a magnetic suction block 15 is fixedly arranged on the top of the vertical rod 17, and the magnetic suction block 15 is located above the limit plate 13, and a piston 14 is fixedly arranged at the bottom of the vertical rod 17, and the piston 14 is parallel to the feed pipe 6; the cone cap 7 is set to be conical, and an electromagnetic The iron block 8 is advantageous in that when feeding is needed, the electromagnet block 8 is first connected to an external power source so that the electromagnet block 8 has magnetism so that the magnetic block 15 can be adsorbed, and at the same time, the magnetic block 15 drives the vertical rod 17 and the piston 14 at the bottom of the vertical rod 17 to move upward in parallel. At this time, the position of the piston 14 is higher than the horizontal line of the feed pipe 6, and the raw materials can automatically enter the interior of the transition cylinder 5 through the feed pipe 6. When it is necessary to stop feeding, the external power source of the electromagnet block 8 is disconnected to make the electromagnet block 8 lose its magnetism. At the same time, the spring 18 restores its own elasticity, pushing the piston 14 to move downward in parallel so that the piston 14 and the feed pipe 6 are at the same horizontal line, so that the piston 14 can block the feed pipe 6, so as to realize the function of automatic feeding, and it has the advantage of simple operation.

[0020] As attached Figure 2-3As shown, a plurality of limiting rods 9 are evenly distributed on the bottom of the cone cap 7, and a sealing cover 10 is fixedly arranged on the bottom of the cone cap 7; a third fixing ring 12 is fixedly arranged on the top of the transition tube 5, and a plurality of first through holes 11 are evenly distributed on the surface of the third fixing ring 12, and the inner diameters of the plurality of first through holes 11 are all adapted to the outer diameter of the limiting rod 9. The transition tube 5 and the cone cap 7 are detachably connected by plugging the limiting rod 9 and the first through holes 11, which is beneficial for realizing the function of limiting the cone cap 7 by inserting the limiting rod 9 into the first through hole 11 when the transition tube 5 and the cone cap 7 are installed.

[0021] As attached Figure 3-4 As shown, a first fixing ring 3 is fixedly provided at the bottom of the transition tube 5, and a second fixing ring 4 is fixedly provided at the top of the discharge tube 1. A plurality of second through holes 16 are provided on the surfaces of the second fixing ring 4 and the first fixing ring 3. The second fixing ring 4 and the first fixing ring 3 are detachably connected by bolts passing through the second through holes 16, which is conducive to the function of detachably installing the transition tube 5 and the discharge tube 1 through the first fixing ring 3 and the second fixing ring 4.

[0022] Working principle of the utility model: when the device is in use, firstly, the unloading barrel 1 and the transition barrel 5 are connected by bolts through the second through hole 16, and then the transition barrel 5 and the cone cap 7 are connected and installed through the limiting rod 9 through the first through hole 11, and then the unloading barrel 1 is installed with the processing furnace body feeding place through the unloading port 2, and then one end of the feeding pipe 6 is connected to the storage bin, and then the external power supply of the electromagnet block 8 is connected to make the electromagnet block 8 magnetic so that the magnetic suction block 15 can be adsorbed, and at the same time, the magnetic suction block 15 drives the vertical rod 17 and the piston 14 at the bottom of the vertical rod 17 to move upward in parallel. At this time, the position of the piston 14 is higher than the horizontal line of the feeding pipe 6, and at the same time, the raw material can automatically enter the interior of the transition barrel 5 through the feeding pipe 6, so as to realize the function of automatic unloading;

[0023] When it is necessary to stop feeding, the external power supply of the electromagnet block 8 is disconnected to make the electromagnet block 8 lose its magnetism. At the same time, the spring 18 restores its elasticity, pushing the piston 14 to move downward in parallel so that the piston 14 and the feed pipe 6 are on the same horizontal line, so that the piston 14 can block the feed pipe 6, so as to realize the function of automatically stopping feeding.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic feeding device for producing single crystals by the Czochralski method, comprising a transition tube (5), characterized in that: The top of the transition tube (5) is provided with a cone cap (7), the surface of the transition tube (5) is provided with a feed pipe (6), the bottom of the transition tube (5) is provided with a discharge tube (1), the bottom of the discharge tube (1) is provided with a discharge port (2), and the inner cavity of the transition tube (5) is provided with a control mechanism; The control mechanism comprises a limit plate (13) fixedly arranged in the inner cavity of the transition cylinder (5); a vertical rod (17) is movably sleeved inside the limit plate (13); a spring (18) is sleeved on the surface of the vertical rod (17); the spring (18) is located at the bottom of the limit plate (13); a magnetic block (15) is fixedly arranged on the top of the vertical rod (17); the magnetic block (15) is located above the limit plate (13); a piston (14) is fixedly arranged at the bottom of the vertical rod (17); the piston (14) is parallel to the feed pipe (6).

2. The automatic feeding device for producing single crystals by the Czochralski method according to claim 1, characterized in that: The cone cap (7) is configured to be cone-shaped, and an electromagnet block (8) is fixedly disposed on the top of the inner cavity of the cone cap (7).

3. The automatic feeding device for producing single crystals by the Czochralski method according to claim 2, characterized in that: A plurality of limiting rods (9) are evenly distributed on the bottom of the cone cap (7), and a sealing cover (10) is fixedly arranged on the bottom of the cone cap (7).

4. The automatic feeding device for producing single crystals by Czochralski method according to claim 1, characterized in that: A third fixing ring (12) is fixedly arranged on the top of the transition tube (5), and a plurality of first through holes (11) are evenly distributed on the surface of the third fixing ring (12). The inner diameters of the plurality of first through holes (11) are all adapted to the outer diameter of the limiting rod (9), and the transition tube (5) and the cone cap (7) are detachably connected by plugging the limiting rod (9) and the first through holes (11).

5. The automatic feeding device for producing single crystals by Czochralski method according to claim 1, characterized in that: A first fixing ring (3) is fixedly arranged at the bottom of the transition tube (5), and a second fixing ring (4) is fixedly arranged at the top of the lower tube (1). The surfaces of the second fixing ring (4) and the first fixing ring (3) are both provided with a plurality of second through holes (16). The second fixing ring (4) and the first fixing ring (3) are detachably connected by bolts passing through the second through holes (16).

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