Air entraining device for retarding oxidation discoloration of seed crystals

Abstract

The utility model relates to the technical field of air entraining devices, in particular to an air entraining device for slowing down oxidation discoloration of seed crystals, which comprises an upper air entraining cover, and a lower air entraining cover is movably arranged at the bottom of the upper air entraining cover. The upper air entraining cover drives the first connecting block to move downwards, the arc-shaped block compresses the ball, and when the arc-shaped surface of the arc-shaped block and the ball are staggered, the cross rod moves to the position between the arc-shaped block and the limiting block, so that the upper air entraining cover and the lower air entraining cover are fixed, and argon enters from the air inlet end of the upper air entraining cover; the air outlet end of the lower air entraining cover is also provided with a gradually reduced narrow channel, and the air flow is further accelerated after passing through the narrow channel, so that heat and attached oxides near the seed rod can be taken away in time, the oxidation discoloration of the seed rod is delayed, the potential safety hazard is reduced, and the usable frequency of the seed rod is increased; the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air entrainment devices, in particular to an air entrainment device that slows down the oxidation and discoloration of seed crystals. Background Art

[0002] The Czochralski method of pulling single crystal silicon is the mainstream method in today's photovoltaic industry. The furnace body of the single crystal furnace used includes a main furnace chamber and an auxiliary furnace chamber. During the crystal growth process, argon gas always flows from top to bottom in the single crystal furnace to provide an oxygen-free environment and take away volatiles and some excess heat. Seed crystals are key materials for producing Czochralski single crystal silicon. Their life and number of uses will greatly affect the cost investment. In current production, when the temperature adjustment time is long or the number of lead-in and release is high, the seed crystals are prone to oxidation and discoloration. The mechanical properties of the seed crystals after oxidation and discoloration will change, greatly increasing the possibility of fracture and posing a greater safety hazard to production. In addition, the occurrence of oxidation and discoloration will not only affect the quality of the pulled crystals to a certain extent, but also cause the time cost and labor cost of replacing the seed crystals to be wasted. For this reason, we propose an air entrainment device that slows down the oxidation and discoloration of the seed crystals to solve the above problems. Utility Model Content

[0003] The utility model aims to provide an air entraining device for slowing down the oxidation discoloration of seed crystals, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an air induction device that slows down the oxidation discoloration of seed crystal, comprising an upper air induction hood, a lower air induction hood movably disposed at the bottom of the upper air induction hood, three fixing rods are fixedly connected to the inner sides of the upper air induction hood and the lower air induction hood, a same circular ring plate is fixedly connected between the corresponding three fixing rods, a same heavy hammer is slidably connected to the inner sides of the two circular ring plates, a graphite chuck is movably connected to the seed crystal rod at the bottom of the heavy hammer, a circular threaded block is fixedly connected to the bottom of the heavy hammer, a threaded groove is provided on the top of the graphite chuck, the circular threaded block is threadedly connected to the threaded groove, a plurality of vertical blocks are fixedly connected to the top of the upper circular plate, the vertical block is threadedly connected to the heavy hammer by bolts, both sides of the upper air induction hood are fixedly connected to a first connecting block, and both sides of the lower air induction hood are fixedly connected to a second connecting block.

[0005] Further preferably, the first connection block is in movably contact with the corresponding second connection block, and a groove is formed on the top of the second connection block.

[0006] Further preferably, a vertical rod is fixedly connected to the bottom of the first connecting block, and an arc block and a limit block are fixedly connected to the outer side of the vertical rod.

[0007] Further preferably, the arc block and the corresponding limit block are movably contacted with a same cross bar, and the end of the cross bar extends outside the second connecting block and is fixedly connected with a pulling block.

[0008] Further preferably, the second connecting block is slidably sleeved on the outer side of the cross bar, and the same spring is fixedly connected between the pulling block and the corresponding second connecting block.

[0009] Further preferably, the spring is movably sleeved on the outer side of the corresponding cross bar, and a ball is embedded at the end of the cross bar.

[0010] Further preferably, the front side and the rear side of the vertical rod are slidably connected to the front inner wall and the rear inner wall of the corresponding groove respectively.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the upper air hood of the utility model drives the first connecting block to move downward, the arc block compresses the ball, and when the arc surface of the arc block is staggered with the ball, the cross bar moves between the arc block and the limit block, so that the upper air hood and the lower air hood are fixed, and argon gas enters from the air inlet end of the upper air hood. Because the overall structure of the air hood has the largest diameter at the air inlet end and then gradually shrinks, the airflow will be accelerated when passing through a narrow area. There is also a gradually shrinking narrow channel at the air outlet end of the lower air hood. After passing through this narrow channel, the airflow will be further accelerated, so that the heat and attached oxides near the seed rod can be taken away in time, the oxidation and discoloration of the seed rod can be delayed, the safety hazard can be reduced, the number of times the seed rod can be used can be increased, and the production cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0013] Figure 2 It is a top view of the three-dimensional structure of the utility model after removing the first connecting block and the second connecting block;

[0014] Figure 3 for Figure 2 A schematic diagram of a cross-sectional three-dimensional structure;

[0015] Figure 4 This is a three-dimensional diagram of the utility model after the heavy hammer and the graphite chuck are separated;

[0016] Figure 5 This is a schematic diagram of the cross-sectional structure of the connection between the first connecting block and the second connecting block in the utility model;

[0017] Figure 6 for Figure 2 Schematic diagram of the enlarged three-dimensional structure of area A in the middle.

[0018] In the figure: 1. upper air hood; 2. lower air hood; 3. fixing rod; 4. circular ring plate; 5. heavy hammer; 6. graphite chuck; 7. seed crystal rod; 8. circular threaded block; 9. threaded groove; 10. vertical block; 11. bolt; 12. first connecting block; 13. second connecting block; 14. groove; 15. vertical rod; 16. arc block; 17. limit block; 18. cross bar; 19. ball; 20. pull block; 21. spring. DETAILED DESCRIPTION

[0019] 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.

[0020] Example

[0021] See also Figure 1-6 The utility model provides a technical solution: an air induction device for slowing down the oxidation discoloration of seed crystals, comprising an upper air induction hood 1, a lower air induction hood 2 is movably provided at the bottom of the upper air induction hood 1, three fixing rods 3 are fixedly connected to the inner sides of the upper air induction hood 1 and the lower air induction hood 2, a same circular ring plate 4 is fixedly connected between the corresponding three fixing rods 3, a same heavy hammer 5 is slidably connected to the inner sides of the two circular ring plates 4, a graphite chuck 6 is movably contacted at the bottom of the heavy hammer 5, a seed crystal rod 7 is fixedly connected to the bottom of the graphite chuck 6, a circular threaded block 8 is fixedly connected to the bottom of the heavy hammer 5, a threaded groove 9 is provided at the top of the graphite chuck 6, the circular threaded block 8 is threadedly connected to the threaded groove 9, a plurality of vertical blocks 10 are fixedly connected to the top of an upper circular plate 4, the vertical block 10 is threadedly connected to the heavy hammer 5 through bolts 11, and both sides of the upper air induction hood 1 are fixed A first connecting block 12 is connected, and second connecting blocks 13 are fixedly connected on both sides of the lower air hood 2. The upper air hood 1 drives the first connecting block 12 to move downward, and the arc block 16 compresses the ball 19. When the arc surface of the arc block 16 is offset from the ball 19, the cross bar 18 moves between the arc block 16 and the limit block 17, so that the upper air hood 1 and the lower air hood 2 are fixed, and argon gas enters from the air inlet end of the upper air hood 1. Because the overall structure of the air hood is that the diameter of the air inlet end is the largest and then gradually shrinks, the airflow will be accelerated when passing through a narrow area. There is also a gradually shrinking narrow passage at the air outlet end of the lower air hood 2. After passing through this narrow passage, the airflow will be further accelerated, so that the heat and attached oxides near the seed crystal rod 7 can be taken away in time, delaying the oxidation and discoloration of the seed crystal rod 7, reducing safety hazards, increasing the number of times the seed crystal rod 7 can be used, and reducing production costs.

[0022] In this embodiment, specifically: the first connection block 12 is in active contact with the corresponding second connection block 13, and a groove 14 is formed on the top of the second connection block 13;

[0023] In this embodiment, specifically: the bottom of the first connecting block 12 is fixedly connected to a vertical rod 15, and the outer side of the vertical rod 15 is fixedly connected to an arc block 16 and a limit block 17;

[0024] In this embodiment, specifically: the arc block 16 and the corresponding limit block 17 are movably contacted with a same cross bar 18, and the end of the cross bar 18 extends outside the second connection block 13 and is fixedly connected with a pull block 20;

[0025] In this embodiment, specifically: the second connection block 13 is slidably sleeved on the outer side of the cross bar 18, and the same spring 21 is fixedly connected between the pull block 20 and the corresponding second connection block 13;

[0026] In this embodiment, specifically: the spring 21 is movably sleeved on the outer side of the corresponding cross bar 18, and the end of the cross bar 18 is embedded with a ball 19;

[0027] In this embodiment, specifically: the front side and the rear side of the vertical rod 15 are slidably connected to the front inner wall and the rear inner wall of the corresponding groove 14 respectively.

[0028] The utility model is at work: when in use, when the upper air ducting hood 1 and the lower air ducting hood 2 are in a separated state and need to be installed, the upper air ducting hood 1 drives the first connecting block 12 to move downward, the first connecting block 12 drives the vertical rod 15 to move downward, the vertical rod 15 drives the arc block 16 to move downward, the arc block 16 compresses the ball 19 during the movement, the ball 19 drives the cross bar 18 to move, the cross bar 18 drives the pull block 20 to move to stretch the spring 21, when the arc surface of the arc block 16 is staggered with the ball 19, the spring 21 in the stretched state is reset, the elastic force of the spring 21 drives the pull block 20 to move, the pull block 20 drives the cross bar 18 to move, the cross bar 18 drives the ball 19 to move between the corresponding arc block 16 and the limit block 17, so that the upper air ducting hood 1 The gas hood 1 is fixed to the lower gas hood 2, and then the weight 5 is passed through the two annular plates 4. The weight 5 and the graphite chuck 6 are threadedly connected. Under the action of the bolt 11, the vertical block 10 is fixedly connected to the weight 5. The upper gas hood 1 is an air inlet end with a slightly flared structure, and the lower gas hood 2 is an air outlet end with a funnel structure. Argon gas enters from the air inlet end of the upper gas hood 1. Because the overall structure of the gas hood is that the diameter of the air inlet end is the largest, and then gradually shrinks, so that the airflow will be accelerated when passing through a narrow area. There is also a gradually shrinking narrow channel at the air outlet end of the lower gas hood 2. After passing through this narrow channel, the airflow will be further accelerated, so that the heat and attached oxides near the seed crystal rod 7 can be taken away in time, delaying the oxidation and discoloration of the seed crystal rod 7, reducing safety hazards, increasing the number of times the seed crystal rod 7 can be used, and reducing production costs.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air entrainment device for slowing down the oxidative discoloration of a seed crystal, comprising an upper air entrainment hood (1), characterized in that: The bottom of the upper air ducting hood (1) is movably provided with a lower air ducting hood (2); the inner sides of the upper air ducting hood (1) and the lower air ducting hood (2) are fixedly connected with three fixing rods (3); the same annular plate (4) is fixedly connected between the corresponding three fixing rods (3); the inner sides of the two annular plates (4) are slidably connected with the same heavy hammer (5); the bottom of the heavy hammer (5) is movably in contact with a graphite chuck (6); the bottom of the graphite chuck (6) is fixedly connected with a seed crystal rod (7); the bottom of the heavy hammer (5) is A circular threaded block (8) is fixedly connected to the top of the graphite chuck (6), a threaded groove (9) is formed on the top of the graphite chuck (6), the circular threaded block (8) is threadedly connected to the threaded groove (9), a plurality of vertical blocks (10) are fixedly connected to the top of the annular plate (4) above, the vertical blocks (10) are threadedly connected to the weight (5) through bolts (11), both sides of the upper air bleed hood (1) are fixedly connected to first connecting blocks (12), and both sides of the lower air bleed hood (2) are fixedly connected to second connecting blocks (13).

2. The air-inducing device for slowing down the oxidative discoloration of seed crystals according to claim 1, characterized in that: The first connection block (12) is in movable contact with a corresponding second connection block (13), and a groove (14) is provided on the top of the second connection block (13).

3. The air-inducing device for slowing down the oxidative discoloration of seed crystals according to claim 2, characterized in that: The bottom of the first connection block (12) is fixedly connected to a vertical rod (15), and the outer side of the vertical rod (15) is fixedly connected to an arc block (16) and a limit block (17).

4. The air-inducing device for slowing down the oxidative discoloration of seed crystals according to claim 3, characterized in that: The arc block (16) and the corresponding limit block (17) are movably connected to a common cross bar (18), and the end of the cross bar (18) extends outside the second connection block (13) and is fixedly connected to a pull block (20).

5. The air-inducing device for slowing down the oxidative discoloration of seed crystals according to claim 4, characterized in that: The second connecting block (13) is slidably sleeved on the outside of the cross bar (18), and a same spring (21) is fixedly connected between the pulling block (20) and the corresponding second connecting block (13).

6. The air-inducing device for slowing down the oxidative discoloration of seed crystals according to claim 5, characterized in that: The spring (21) is movably sleeved on the outside of the corresponding cross bar (18), and a ball (19) is embedded at the end of the cross bar (18).

7. The air-inducing device for slowing down the oxidative discoloration of seed crystals according to claim 6, characterized in that: The front side and the rear side of the vertical rod (15) are respectively slidably connected to the front inner wall and the rear inner wall of the corresponding groove (14).

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