Single crystal silicon dust collector oxidation stirring mechanism

Abstract

The utility model relates to photovoltaic semiconductor equipment technical field, specifically disclose monocrystalline silicon dust remover oxidation stirring mechanism, including the air cylinder, rack gear, gear, drive shaft, fixed frame and fan blade of being located on the cover, the telescopic end of air cylinder penetrates cover and is connected with one end of rack gear through connecting mechanism, the rack gear is engaged connection with gear, the outer wall of drive shaft is connected with the inner wall of gear through the key, the fixed frame is symmetrically arranged in the upper and lower sides of rack gear, air cylinder drives rack gear reciprocating motion through connecting mechanism, and rack gear engages and drives gear and drive shaft rotation, finally drives fan blade rotation, and adopts gear rack transmission to avoid the sealing problem of rotating shaft, and through the two supporting wheels that set up respectively with the bottom and side of rack gear and stick to in the connecting frame, ensure the stability and accuracy of transmission, the utility model has the advantages of high reliability, transmission stability, convenient maintenance and good stirring effect, especially suitable for the oxidation stirring of monocrystalline silicon dust remover bottom dust.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic semiconductor equipment technology, and specifically discloses an oxidation stirring mechanism for a monocrystalline silicon dust collector. Background Technology

[0002] During the process of pulling monocrystalline silicon in photovoltaic semiconductors, a large amount of fine and flammable silicon powder is generated in the monocrystalline furnace. This dust enters the monocrystalline silicon dust collector located between the vacuum pump and the monocrystalline furnace with the airflow and is deposited at the bottom. In order to achieve safe handling, oxygen needs to be slowly introduced under vacuum and stirred to make the dust fully and evenly contact the oxygen for slow oxidation, so as to eliminate the risk of combustion or explosion.

[0003] Currently, this field commonly employs stirring mechanisms based on rotary shafts; however, such mechanisms suffer from the following core technological bottlenecks:

[0004] First, the sealing and reliability of the transmission structure are insufficient; the traditional rotating shaft structure relies on dynamic seals. Under continuous high dust conditions, fine dust can easily penetrate the bearings and seals, leading to a sharp increase in rotational resistance, rapid wear of components, or even jamming, resulting in a high failure rate of the mechanism; frequent downtime maintenance not only interrupts the continuous production process but also significantly increases operating costs.

[0005] Second, transmission accuracy and stability are difficult to guarantee; even if the mechanism can operate, the intrusion and accumulation of dust will affect the smoothness and accuracy of the transmission; if the stirring action is inaccurate or unstable, it will lead to uneven stirring of dust at the bottom, forming oxidation dead corners and local heat accumulation, which will exacerbate the safety risks.

[0006] Therefore, there is an urgent need in this field for a mixer that can fundamentally avoid the sealing problem and maintain transmission accuracy and reliability over a long period of time in high dust environments. Utility Model Content

[0007] This invention proposes an oxidation stirring mechanism for a monocrystalline silicon dust collector. This mechanism can achieve stable and thorough dust stirring under high dust conditions, and has the advantages of dustproof, durable and easy to maintain. It effectively ensures the safe oxidation of dust in the monocrystalline silicon dust collector, reduces failure and downtime, and lowers production and maintenance costs.

[0008] This utility model is implemented as follows: an oxidation stirring mechanism for a single-crystal silicon dust collector includes a cylinder, a rack, a gear, a drive shaft, a fixing frame, and fan blades mounted on a cover. The telescopic end of the cylinder penetrates the cover and is connected to one end of the rack via a connecting mechanism. The rack meshes with the gear. The outer wall of the drive shaft is connected to the inner wall of the gear via a key. The fixing frame is a plate-shaped structure, symmetrically arranged on the upper and lower sides of the rack, with both ends of the drive shaft penetrating the fixing frame and rotatably connected to it. The fan blades are inclinedly arranged on both sides below the outer wall of the drive shaft. One end of each fixing frame is fixedly connected to the cover, and the other end is connected via a connecting frame. The connecting frame contains two support wheels, which are respectively attached to the bottom of the rack and the side of the rack away from the gear.

[0009] As a preferred embodiment of the oxidation stirring mechanism for the monocrystalline silicon dust collector of this utility model, the connecting mechanism includes a protective telescopic sleeve, a first flange, a second flange, and a rectangular connecting frame with a connecting rod on its outer wall; one end of the protective telescopic sleeve is connected to the opening of the cover body by a clamp, and the other end is connected to the first flange; the second flange is fixed to the outer wall of the connecting rod, and the first flange is connected to the second flange by bolts; the telescopic end of the cylinder is fixedly connected to the connecting rod; one end of the rack extends into the rectangular connecting frame and is fixed by bolts.

[0010] As a preferred embodiment of the oxidation stirring mechanism of the monocrystalline silicon dust collector of this utility model, the support wheel includes a U-shaped bracket fixedly connected to the inner wall of the connecting frame and a roller rotatably disposed within the bracket, the outer wall of the roller being in contact with the rack; and a copper sleeve is embedded in the roller.

[0011] In the preferred embodiment of the oxidation stirring mechanism of the monocrystalline silicon dust collector of this utility model, both the gear and the rack are made of aluminum alloy.

[0012] In a preferred embodiment of the oxidation stirring mechanism for the monocrystalline silicon dust collector of this utility model, the fixed frame is provided with a bushing on the side near the gear, and the drive shaft passes through the bushing.

[0013] As a preferred embodiment of the oxidation stirring mechanism of the monocrystalline silicon dust collector of this utility model, the fan blades are multiple and evenly distributed circumferentially along the drive shaft, and the fan blade tilt angle is 30°-60°.

[0014] As a preferred embodiment of the oxidation stirring mechanism of the monocrystalline silicon dust collector of this utility model, the cylinder is a reciprocating cylinder, whose stroke is matched with the length of the rack to achieve 360° rotation of the fan blades.

[0015] The beneficial effects of this utility model are:

[0016] 1. The gear and rack meshing transmission avoids the problems of traditional rotary shaft dynamic seals from a structural perspective, greatly reducing the jamming and failure rate caused by dust intrusion.

[0017] 2. The guide support wheel system, consisting of the bottom support wheel and the side guide wheel, effectively counteracts the weight of the rack and pinion and the backlash, ensuring smooth transmission and precise meshing.

[0018] Furthermore, the support rollers are fitted with copper sleeves, which have good wear resistance; the connecting mechanism is modular and equipped with protective telescopic sleeves, which not only protect the core pneumatic components, but also facilitate disassembly and maintenance.

[0019] The optimized design of the fan blades at a specific angle, combined with stable 360° rotation, ensures uniform stirring without dead angles, effectively improving oxidation efficiency and safety. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the right-side structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the left-side structure of this utility model.

[0024] Figure 4 This is a front view structural diagram of the present invention.

[0025] Figure 5 This is a schematic diagram of the rear view structure of this utility model.

[0026] The markings in the diagram are: 1. Cover; 2. Cylinder; 3. Rack; 4. Gear; 5. Drive shaft; 6. Fixing frame; 7. Fan blade; 8. Connecting mechanism; 9. Connecting frame; 10. Support wheel; 11. Protective telescopic sleeve; 12. First flange; 13. Second flange; 14. Connecting rod; 15. Rectangular connecting frame; 16. Clamp; 17. Bracket; 18. Roller; 19. Bushing. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0028] Please see Figure 1-5The oxidation stirring mechanism of the monocrystalline silicon dust collector includes a cylinder 2, a rack 3, a gear 4, a drive shaft 5, a fixing frame 6, and a fan blade 7, all mounted on a cover 1. The telescopic end of the cylinder 2 passes through the cover 1 and is connected to one end of the rack 3 via a connecting mechanism 8. The rack 3 is meshed with the gear 4. The outer wall of the drive shaft 5 is connected to the inner wall of the gear 4 via a key. The fixing frame 6 is a plate-shaped structure, symmetrically arranged on the upper and lower sides of the rack 3, with both ends of the drive shaft 5 passing through and rotatably connected to the fixing frame 6. The fan blade 7 is inclinedly arranged on both sides below the outer wall of the drive shaft 5. One end of each fixing frame 6 is fixedly connected to the cover 1, and the other end is connected via a connecting frame 9. The connecting frame 9 has two support wheels 10 inside, which are respectively attached to the bottom of the rack 3 and the side of the rack 3 away from the gear 4.

[0029] In this embodiment: When the cylinder 2 is energized and ventilated, its telescopic end drives the rack 3 to perform linear reciprocating motion through the connecting mechanism 8, which consists of a protective telescopic sleeve 11, a flange, and a rectangular connecting frame 15; the gear 4 meshing with the rack 3 rotates accordingly, and drives the drive shaft 5 to rotate through a key connection, ultimately driving the fan blade 7, which is tilted and mounted on the drive shaft 5, to rotate; during this process, the two support wheels 10 with embedded copper sleeves at the bottom and side of the rack 3 respectively play the role of supporting the weight of the rack 3 and guiding and limiting it, ensuring that the rack 3 moves smoothly and meshes tightly with the gear 4 without gaps, so that the fan blade 7 can rotate and stir stably and reliably after dust is deposited at the bottom of the equipment, so that the dust can fully contact oxygen and achieve safe, uniform, and slow oxidation.

[0030] As a technical optimization of this utility model, the connecting mechanism 8 includes a protective telescopic sleeve 11, a first flange 12, a second flange 13, and a rectangular connecting frame 15 with a connecting rod 14 on its outer wall; one end of the protective telescopic sleeve 11 is connected to the opening of the cover 1 through a clamp 16, and the other end is connected to the first flange 12; the second flange 13 is fixed to the outer wall of the connecting rod 14, and the first flange 12 is connected to the second flange 13 by bolts; the telescopic end of the cylinder 2 is fixedly connected to the connecting rod 14; one end of the rack 3 extends into the rectangular connecting frame 15 and is fixed by bolts.

[0031] In this embodiment: the protective telescopic sleeve 11 achieves a dustproof seal at the connection between the telescopic end of the cylinder 2 and the cover 1, preventing dust from entering the interior of the cylinder 2 or the transmission gap; the detachable connection design of the first flange 12 and the second flange 13 facilitates the disassembly and maintenance of the cylinder 2 and the rack 3; the rectangular connecting frame 15 ensures a stable connection between the rack 3 and the connecting rod 14, further improving the transmission reliability and making up for the shortcomings of traditional direct connection in terms of poor dustproofing and difficult disassembly and assembly.

[0032] As a technical optimization of this utility model, the support wheel 10 includes a U-shaped bracket 17 fixed to the inner wall of the connecting frame 9 and a roller 18 rotatably disposed in the bracket 17. The outer wall of the roller 18 is in contact with the rack 3. A copper sleeve is embedded in the roller 18.

[0033] In this embodiment: the U-shaped bracket 17 enables the stable installation of the roller 18, and the embedded copper sleeve reduces the rotational friction between the roller 18 and the bracket 17. At the same time, the copper sleeve has a certain degree of dust protection, preventing dust from entering the rotating part of the roller 18 and causing jamming. This ensures that the support wheel 10 provides continuous and effective support and guidance for the rack 3, reduces the wear of the rack 3, and extends the service life of the components.

[0034] As a technical optimization of this utility model, both gear 4 and rack 3 are made of aluminum alloy.

[0035] In this embodiment: the aluminum alloy is lighter, which can reduce the offset tendency caused by the weight of the rack 3 itself and ensure meshing accuracy; at the same time, the aluminum alloy has good wear resistance and corrosion resistance, which can reduce tooth surface wear in high dust environment and further improve the durability of the transmission mechanism.

[0036] As a technical optimization of this utility model, the fixing frame 6 is provided with a bushing 19 on the side near the gear 4, and the drive shaft 5 passes through the bushing 19.

[0037] In this embodiment, the bushing 19 can provide radial positioning and support for the drive shaft 5, preventing radial wobbling of the drive shaft 5 during rotation, ensuring stable meshing position of the gear 4 and rack 3, reducing direct friction between the drive shaft 5 and the fixed frame 6, extending the service life of the drive shaft 5, and ensuring stable rotation trajectory of the fan blade 7.

[0038] As a technical optimization of this utility model, there are multiple fan blades 7, which are evenly distributed around the drive shaft 5, and the tilt angle of the fan blades 7 is 30°-60°.

[0039] In this embodiment, multiple fan blades 7 are evenly distributed around the drive shaft 5 to expand the stirring coverage area. The "30°-60° tilt angle" ensures that the fan blades 7 can effectively stir the dust at the bottom of the dust collector when they rotate, avoiding the formation of oxidation dead corners due to local dust accumulation, improving the uniformity of dust and oxygen contact, and reducing the risk of combustion.

[0040] As a technical optimization of this utility model, the cylinder 2 is a reciprocating cylinder 2, whose stroke is matched with the length of the rack 3 to achieve 360° rotation of the fan blade 7.

[0041] In this embodiment: the cylinder 2 is reciprocating and its stroke is matched with the length of the rack 3 (matching is based on factors such as the number of teeth and the effective meshing length), ensuring that the extension and retraction of the cylinder 2 can drive the rack 3 to move a sufficient distance, thereby driving the gear 4 to rotate 360°, so that the fan blade 7 can achieve complete circumferential stirring, avoiding the problem of incomplete stirring due to insufficient rotation angle, and ensuring that the dust is fully oxidized.

[0042] Working principle and usage process of this utility model:

[0043] During the monocrystalline silicon crystal pulling process, dust-laden gas enters the monocrystalline silicon dust collector, and dust settles at the bottom of the dust collector. At this time, the stirring mechanism is activated. Air is supplied to the reciprocating cylinder 2, and the telescopic end of the cylinder 2 begins to move. Since the stroke of the cylinder 2 matches the length of the rack 3, its telescopic end drives the connecting rod 14 and the rectangular connecting frame 15 in the connecting mechanism 8 to move synchronously, thereby driving the rack 3 embedded in the rectangular connecting frame 15 to perform linear reciprocating motion. During the movement of the rack 3, the two support wheels 10 on the connecting frame 9 support and guide the rack 3 from the bottom and the side, respectively, to prevent the rack 3 from deviating and ensure that the rack 3 and the gear 4 are always stably meshed. At the same time, the protective telescopic sleeve 11 extends and retracts synchronously with the telescopic end of the cylinder 2, continuously sealing the gap between the telescopic end of the cylinder 2 and the cover 1 to prevent dust from entering. The rack 3 and the gear 4. Meshing transmission drives gear 4 to rotate around the axis of drive shaft 5 (drive shaft 5 rotates stably on fixed frame 6 through bushing 19 without radial wobble); gear 4 drives drive shaft 5 to rotate synchronously through key, and multiple evenly distributed and inclined fan blades 7 at the lower end of drive shaft 5 rotate accordingly, fully agitating the dust deposited at the bottom of the dust collector; during the agitation process, the dust is dispersed by fan blades 7 and comes into full contact with the oxygen slowly introduced into the dust collector, achieving slow oxidation and avoiding local combustion; when the dust oxidation is complete, the air source of cylinder 2 is turned off, fan blades 7 stop rotating, and the agitation operation ends; if maintenance is required, the connecting bolts of the first flange 12 and the second flange 13 can be removed, the cylinder 2 and the rack 3 can be separated, or the bolts of the rectangular connecting frame 15 and the rack 3 can be removed, and the corresponding parts can be replaced or maintained.

[0044] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. An oxidation stirring mechanism for a monocrystalline silicon dust collector, characterized in that: The system includes a cylinder (2), a rack (3), a gear (4), a drive shaft (5), a fixing frame (6), and a fan blade (7) mounted on the cover (1). The telescopic end of the cylinder (2) passes through the cover (1) and is connected to one end of the rack (3) via a connecting mechanism (8). The rack (3) meshes with the gear (4). The outer wall of the drive shaft (5) is connected to the inner wall of the gear (4) via a key. The fixing frame (6) is a plate-shaped structure and is symmetrically arranged parallel to the rack. (3) The upper and lower sides of the drive shaft (5) are respectively connected to the fixed frame (6) and rotated; the fan blade (7) is inclined on both sides of the lower outer wall of the drive shaft (5); one end of the two fixed frames (6) is fixedly connected to the cover (1), and the other end is connected through the connecting frame (9); the connecting frame (9) is provided with two support wheels (10), and the two support wheels (10) are respectively attached to the bottom of the rack (3) and the side of the rack (3) away from the gear (4).

2. The oxidation stirring mechanism for a single-crystal silicon dust collector according to claim 1, characterized in that: The connecting mechanism (8) includes a protective telescopic sleeve (11), a first flange (12), a second flange (13), and a rectangular connecting frame (15) with a connecting rod (14) on its outer wall. One end of the protective telescopic sleeve (11) is connected to the opening of the cover (1) through a clamp (16), and the other end is connected to the first flange (12). The second flange (13) is fixed to the outer wall of the connecting rod (14), and the first flange (12) is connected to the second flange (13) by bolts. The telescopic end of the cylinder (2) is fixedly connected to the connecting rod (14). One end of the rack (3) extends into the rectangular connecting frame (15) and is fixed by bolts.

3. The oxidation stirring mechanism for a single-crystal silicon dust collector according to claim 1, characterized in that: The support wheel (10) includes a U-shaped bracket (17) fixed to the inner wall of the connecting frame (9) and a roller (18) rotatably disposed in the bracket (17). The outer wall of the roller (18) is in contact with the rack (3). A copper sleeve is embedded in the roller (18).

4. The oxidation stirring mechanism for a single-crystal silicon dust collector according to claim 1, characterized in that: Both the gear (4) and the rack (3) are made of aluminum alloy.

5. The oxidation stirring mechanism for a single-crystal silicon dust collector according to claim 1, characterized in that: The fixing frame (6) has a bushing (19) on the side near the gear (4), and the drive shaft (5) passes through the bushing (19).

6. The oxidation stirring mechanism for a single-crystal silicon dust collector according to claim 1, characterized in that: The fan blades (7) are multiple and are evenly distributed around the drive shaft (5), with the fan blades (7) tilted at an angle of 30°-60°.

7. The oxidation stirring mechanism for a single-crystal silicon dust collector according to claim 1, characterized in that: The cylinder (2) is a reciprocating cylinder (2), whose stroke is matched with the length of the rack (3) to achieve 360° rotation of the fan blade (7).

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