A filling device and apparatus

Abstract

This utility model provides a filling device and equipment, including a filling cylinder and at least one buffer member disposed within the filling cylinder. The outer diameter of the filling cylinder is smaller than the inner diameter of the refilling cylinder. The filling cylinder has an inlet for connecting to a storage device and an outlet for discharging material into the refilling cylinder. The buffer member is inclined towards the outlet. The beneficial effects of this utility model are that the silicon raw material is buffered by multiple buffer members during its descent, shortening the free fall distance of the silicon raw material, allowing it to fall into the refilling cylinder with less impact force, extending the service life of the refilling cylinder and the quartz umbrella, preventing the silicon raw material from being compacted inside the refilling cylinder, and preventing the molybdenum rod from being squeezed and fixed inside the refilling cylinder. This allows the molybdenum rod to descend during refilling, ensuring smooth refilling and avoiding any impact on the crystal formation of single crystals.

Description

Technical Field

[0001] This utility model belongs to the field of silicon single crystal production technology, and in particular relates to a filling device and equipment. Background Technology

[0002] Currently, filling machines are constantly being updated and iterated. The latest filling machines have greatly improved their automation capabilities, but they cannot completely solve the problem of the refilling cylinder jamming during the filling process. When filling, the refilling cylinder is at a 90° angle to the ground and is completely upright on the ground. The silicon raw material block falls from the opening of the refilling cylinder. There is no force relief device during the filling process, which causes the material block to be compacted in the refilling cylinder during the filling process. The feeding action cannot be completed during the refilling process, which affects the connection of the refilling steps. This results in the high-temperature baking time of the quartz crucible being too long, affecting crystal formation and production capacity, and affecting the crystal formation and quality of single crystals. Summary of the Invention

[0003] In view of the above problems, this utility model provides a filling device and equipment to solve the problem that in the prior art, the material block is already compacted in the refilling cylinder during the filling process, and the feeding action cannot be completed during the refilling process.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a filling device, including a filling cylinder and at least one buffer member disposed in the filling cylinder. The outer diameter of the filling cylinder is smaller than the inner diameter of the refilling cylinder. The filling cylinder is provided with an inlet for connecting to a storage device and an outlet for discharging material into the refilling cylinder. The buffer member is configured to be inclined toward the outlet.

[0005] Furthermore, the filling cylinder is configured to move relative to the refilling cylinder.

[0006] Furthermore, the filling device also includes a lifting component connected to the filling cylinder. The lifting component is activated to drive the filling cylinder to move up and down. During the filling process, the outlet of the filling cylinder is always positioned above the filling surface of the silicon raw material in the refilling cylinder.

[0007] Furthermore, it also includes a rotation control component, a buffer component that is rotatably connected to the filling cylinder, and a rotation control component that is connected to both the buffer component and the filling cylinder. When the rotation control component is activated, it adjusts the buffer component to rotate to be close to or away from the side wall of the filling cylinder, thus fixing the buffer component at any angle.

[0008] Furthermore, it also includes a sliding assembly that can move along the axial direction of the filling cylinder, and a buffer component that is rotatably connected to the sliding assembly; and

[0009] The filling device also includes a rotation control component, which is connected to the buffer and the sliding component respectively. When the rotation control component is activated, it adjusts the buffer to rotate to be close to or away from the side wall of the filling cylinder, and fixes the buffer at any angle.

[0010] Furthermore, the rotation control assembly includes at least one of a hydraulic cylinder assembly, a pneumatic cylinder assembly, and a motor assembly.

[0011] Furthermore, multiple buffers are arranged in an alternating pattern along the axial direction of the filling cylinder.

[0012] Furthermore, the filling device also includes a gathering component, one end of which is configured to always be close to the feed inlet, and the other end is used to connect to the feed end side of the storage device or the refilling cylinder.

[0013] Furthermore, the gathering component is a telescopic tube structure, or the gathering component is a tube structure with one end opening larger than the other end opening size, and the inner diameter of the smaller opening end of the gathering component is smaller than the inner diameter of the feed port.

[0014] A direct-filling filling device includes a storage device and a filling device as described above, wherein the discharge end of the storage device is matched with the inlet of the filling cylinder in the filling device.

[0015] By adopting the above technical solution, the filling device is equipped with a filling cylinder and a buffer component installed inside the filling cylinder. The buffer component is inclined towards the outlet of the filling cylinder. The buffer component cushions the silicon raw material falling inside the filling cylinder, reducing the force of the silicon raw material's descent. The filling cylinder allows the silicon raw material in the storage device to fall along the filling cylinder into the refilling cylinder, where it is guided during the descent. Multiple buffer components are staggered along the axial direction of the filling cylinder, so that the silicon raw material is cushioned by multiple buffer components during its descent, shortening the free fall distance of the silicon raw material and allowing it to fall at a more... Small impacts fall into the re-injection cylinder, and the silicon material exerts less force on the silicon material in contact with it in the re-injection cylinder, avoiding the silicon material falling into the re-injection cylinder to be compacted. The squeezing pressure between the silicon materials is reduced, preventing the molybdenum rod from being squeezed and fixed in the re-injection cylinder, so that the molybdenum rod can be lowered during re-injection. It also allows a layer of silicon material in contact with the quartz umbrella to slide out from the gap between the re-injection cylinder and the quartz umbrella as the umbrella opens, falling into the re-injection cylinder, preventing the re-injection cylinder from being cracked, ensuring the smooth re-injection process, avoiding affecting the crystal formation of single crystals, and extending the service life of the re-injection cylinder and the quartz umbrella.

[0016] During the filling process, the filling cylinder can rise relative to the refilling cylinder, and the outlet of the filling cylinder is always above the filling surface of the silicon raw material in the refilling cylinder, avoiding contact between the outlet of the filling cylinder and the silicon raw material, shortening the free fall distance of the silicon raw material, preventing the filling cylinder from getting stuck in the refilling cylinder during the filling process, and ensuring the efficiency of the filling process.

[0017] The buffer can rotate relative to the filling cylinder, so that the angle of the buffer relative to the side wall of the filling cylinder is adjustable, and the buffer can be positioned at any angle, so that the buffer can buffer the silicon material. When the silicon material is stuck between the buffer and the molybdenum rod, the buffer can rotate to allow the silicon material to fall, ensuring the efficiency of the filling process.

[0018] The converging component design ensures that the silicon raw material flowing from the storage device enters the filling cylinder and does not fall outside the refilling cylinder, thus preventing contamination of the silicon raw material. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of a filling device according to an embodiment of the present invention;

[0020] Figure 2 This is a top view of the filling device according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the force analysis when silicon raw material comes into contact with a buffer component according to an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of a filling device equipped with a lifting component according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a lifting assembly according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of a filling device with a sliding component according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of a filling device with a gathering component according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of a filling device with a gathering component (another structure) according to an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Filling cylinder 2. Buffer component 3. Rotation control assembly

[0029] 4. Re-feeding cylinder; 5. Molybdenum rod; 6. Material storage device

[0030] 7. Lifting assembly; 8. Support frame; 9. Retraction assembly

[0031] 10. Lifting component; 11. Sliding component; 70. Power component

[0032] 71. Rotating component; 72. Transmission component; 73. Connecting component Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 The diagram shows a structural schematic of an embodiment of the present invention. This embodiment relates to a filling device and equipment for filling a refilling cylinder. The filling device has a filling cylinder and a buffer component located inside the filling cylinder. When filling the refilling cylinder, the outlet of the filling cylinder is located inside the refilling cylinder. The silicon raw material enters the refilling cylinder along the filling cylinder and comes into contact with the buffer component during the descent of the silicon raw material. The buffer component buffers the force of the silicon raw material's descent, shortens the free fall distance of the silicon raw material, and prevents the silicon raw material from being compacted in the refilling cylinder, thus avoiding the phenomenon of molybdenum rod jamming and ensuring that there is no cylinder jamming during the refilling process.

[0035] A filling device, such as Figure 1-3 As shown, it includes a filling cylinder 1 and a buffer 2 disposed inside the filling cylinder 1. When filling the refilling cylinder 4, the filling cylinder 1 can guide the silicon raw material during the descent of the silicon raw material, so that the silicon raw material descends along the axial direction of the filling cylinder 1 and fills the refilling cylinder 4, thereby realizing the filling of the refilling cylinder 4. Moreover, the setting of the filling cylinder 1 also facilitates the installation of the buffer 2.

[0036] The outer diameter of the filling cylinder 1 is smaller than the inner diameter of the refilling cylinder 4, so that the outlet of the filling cylinder 1 can extend into the interior of the refilling cylinder 4, so that the silicon raw material enters the refilling cylinder 4 from the outlet of the filling cylinder 1 during the filling process; the filling cylinder 1 is provided with an inlet for connecting to the storage device 6 and an outlet for discharging material into the refilling cylinder 4, so that the silicon raw material stored in the storage device 6 enters the refilling cylinder 4 through the filling cylinder 1 to fill the refilling cylinder 4;

[0037] Buffer 2 is installed inside the filling cylinder 1 and is inclined towards the discharge port so that the silicon raw material in the storage device 6 enters the filling cylinder 1 through the inlet. During the free fall of the silicon raw material in the filling cylinder 1, the buffer 2 buffers the force of the silicon raw material's descent, so that the silicon raw material falls into the refilling cylinder 4 after being unloaded, shortening the free fall distance of the silicon raw material and allowing it to fall into the refilling cylinder 4 with a smaller impact force. This results in less pressure between the silicon raw materials in the refilling cylinder 4 after filling, and facilitates refilling. The silicon raw materials between the layers inside cylinder 4 are not tightly compacted, and the silicon raw materials will not squeeze the molybdenum rod 5. This prevents the molybdenum rod 5 from failing to descend during the refilling process and also prevents the refilling cylinder 4 from cracking due to the opening of the umbrella for feeding. This extends the service life of the refilling cylinder 4 and the quartz umbrella and ensures that the feeding process is completed smoothly. The buffer 2 is set towards the discharge port, which can prevent the silicon raw materials from staying in the space between the buffer 2 and the inner wall of the filling cylinder 1, thus avoiding the retention of silicon raw materials.

[0038] Specifically, the aforementioned filling cylinder 1 is a cylindrical structure with a certain length and an internal space, allowing multiple silicon raw materials to fall simultaneously inside the filling cylinder 1, ensuring filling efficiency. The inlet and outlet are respectively located at both ends of the axial direction of the filling cylinder 1, and both the inlet and outlet are connected to the internal space of the filling cylinder 1. Through the setting of the inlet and outlet, the internal space of the filling cylinder 1 is connected to the external space at both ends of the axial direction, so that the silicon raw materials can enter the internal space of the filling cylinder 1 through the inlet, fall freely in the internal space, be discharged from the outlet, and enter the refilling cylinder 4 to realize the filling of the refilling cylinder 4.

[0039] The cross-sectional shape of the filling cylinder 1 can be circular, square, or other polygonal, depending on the actual needs. No specific requirements are specified here. To facilitate the installation of the buffer 2, in some feasible embodiments, the cross-sectional shape of the filling cylinder 1 is preferably square.

[0040] The filling cylinder 1 can be a constant-diameter cylinder structure, that is, the radial dimension of the filling cylinder 1 is consistent along the axial direction and does not change, and the outer diameter of the filling cylinder 1 is smaller than the inner diameter of the refilling cylinder 4; or, the filling cylinder 1 can also be a non-constant-diameter cylinder structure, that is, the radial dimension of the filling cylinder 1 is inconsistent along the axial direction, and the radial dimension of the filling cylinder 1 gradually increases or decreases along the direction from the inlet to the outlet, and the maximum outer diameter of the filling cylinder 1 is smaller than the inner diameter of the refilling cylinder 4 so that the filling cylinder 1 can enter the refilling cylinder 4; the axial shape of the filling cylinder 1 is selected according to actual needs, and no specific requirements are made here.

[0041] One or more of the aforementioned buffer elements 2 are disposed within the internal space of the filling cylinder 1. During the free fall of the silicon raw material, the buffer element 2 contacts the silicon raw material and buffers the gravity acting on it. The buffer element 2 is a plate structure with a certain length along the radial direction of the filling cylinder 1. This length is less than half the radial dimension of the filling cylinder 1, preventing interference between the buffer element 2 and the molybdenum rod 5 inside the refilling cylinder 4 during filling. The length of the buffer element 2 is selected according to actual needs. The buffer element 2 has a certain area to increase the probability of contact between it and multiple silicon raw materials, allowing each buffer element 2 to buffer multiple silicon raw materials simultaneously. The area of ​​the buffer element 2 is selected based on the internal space dimensions of the filling cylinder 1; specific requirements are not specified here.

[0042] The shape of the buffer 2 can be semi-circular, square, or polygonal, depending on the actual needs; no specific requirements are specified here. To facilitate the connection between the buffer 2 and the filling cylinder 1, so that the buffer 2 can remain stationary at a certain tilt angle during the falling of the silicon raw material, in some feasible embodiments, the shape of the buffer 2 is preferably square.

[0043] When there are multiple buffers 2, they are staggered along the axial direction of the filling cylinder 1 so that each silicon material entering the filling cylinder 1 contacts at least one buffer 2 during its descent. The buffers 2 cushion the force of the silicon material falling. When each silicon material contacts multiple buffers 2 in sequence during its descent, each buffer 2 cushions the force of the silicon material falling, allowing each silicon material to undergo multiple buffering processes during its descent. This results in each silicon material finally falling into the refilling cylinder 4 with a smaller impact force. Each silicon material exerts a smaller force on other silicon materials in contact with it in the refilling cylinder 4, preventing the silicon material falling into the refilling cylinder 4 from being compacted and the molybdenum rod from being squeezed by the silicon material and unable to descend. This ensures that the molybdenum rod 5 in the refilling cylinder 4 can descend smoothly during refilling, ensuring the smooth progress of refilling. It also ensures that the silicon material in the refilling cylinder 4 can slide out from the gap between the cylinder body of the refilling cylinder 4 and the quartz umbrella during refilling and enter the quartz crucible.

[0044] like Figure 3 As shown, a force analysis of a silicon material falling into the filling cylinder 1 shows that the silicon material entering the filling cylinder 1 falls in free fall. At this time, the silicon material is only subjected to its own weight G. When the silicon material comes into contact with the buffer 2, the buffer 2 applies an upward support force F to the silicon material. The vertical component of the support force F offsets part of the weight G of the silicon material, that is, it buffers the silicon material, so that the silicon material finally falls into the refilling cylinder 4 with a smaller impact force.

[0045] Multiple buffer elements 2 are staggered along the axial direction of the filling cylinder 1. That is, there is one buffer element 2 on any plane along any radial direction of the filling cylinder 1. Multiple planes are arranged sequentially along the axial direction of the filling cylinder 1. The buffer elements 2 on two adjacent planes are not located on the same side wall of the filling cylinder 1. For example, when the filling cylinder 1 is a square cylinder structure, it has four side walls (first side wall, second side wall, third side wall, and fourth side wall) connected sequentially along the circumferential direction. The first side wall is arranged opposite to the second side wall, and the third side wall is arranged opposite to the fourth side wall. The first buffer element 2 is arranged on the first side wall, and the distance between the first buffer element 2 and the feed inlet is the first distance. The second buffer element 2 is arranged on the second side wall, and the distance between the second buffer element 2 and the feed inlet is the second distance. The first distance is less than the second distance. The third buffer element 2 is arranged on the second side wall, and the distance between the second buffer element 2 and the feed inlet is the second distance. 2. The third buffer 2 is set on the third side wall, and the distance between the third buffer 2 and the feed inlet is the third distance, which is greater than the second distance. The fourth buffer 2 is set on the fourth side wall, and the distance between the fourth buffer 2 and the feed inlet is the fourth distance, which is greater than the third distance. The fifth buffer 2 is set on the first side wall, and the distance between the fifth buffer 2 and the feed inlet is the fifth distance, which is greater than the fourth distance, and so on. In this way, multiple buffers 2 are arranged alternately along the axial direction of the filling cylinder 1. No multiple buffers 2 are set in the same circumference, so that multiple buffers 2 can buffer the silicon raw material and will not hinder the fall of the silicon raw material. This makes the movement trajectory of the silicon raw material in the filling cylinder 1 a curve, rather than a straight line of free fall, thus reducing the impact force of the silicon raw material falling and shortening the distance of the silicon raw material falling freely.

[0046] The number of buffer components 2 can be selected and set according to the axial length of the filling cylinder 1, and no specific requirements are made here.

[0047] The axial length of the filling cylinder 1 is not specifically limited. The axial length of the filling cylinder 1 can be large, so that when the outlet of the filling cylinder 1 is close to the quartz umbrella, the inlet of the filling cylinder 1 is located outside the refilling cylinder 4. Alternatively, the axial length of the filling cylinder 1 can be small, so that when the outlet of the filling cylinder 1 is close to the quartz umbrella, the inlet of the filling cylinder 1 is also located inside the refilling cylinder 4. The axial length of the filling cylinder 1 can be selected and set according to actual needs, and no specific requirements are made here.

[0048] In some feasible embodiments, the axial length of the filling cylinder 1 can be selected and set according to the distance between the feeding end of the refilling cylinder 4 and the storage device 6 and the axial length of the refilling cylinder 4.

[0049] like Figure 4-6As shown, in order to ensure that the silicon raw material falls into the refilling cylinder 4 with a very small distance after being buffered by the last buffer plate, thus shortening the drop distance of the silicon raw material and achieving the goal of the silicon raw material falling into the refilling cylinder 4 with a small impact force, the filling cylinder 1 is set to be movable relative to the refilling cylinder 4. The filling cylinder 1 can enter the refilling cylinder 4, and the filling cylinder 1 rises while filling during the filling process. After each layer of silicon raw material is laid in the refilling cylinder 4, the filling cylinder 1 rises to a certain height, or the filling cylinder 1 rises at a certain speed uniformly to achieve smooth filling of the refilling cylinder 4. The filling cylinder 1 rises and falls, while the refilling cylinder 4 does not move.

[0050] The rising speed / rising distance of the filling cylinder 1 is selected according to the particle size of the silicon raw material and the total weight of the silicon raw material in the storage device 6. When the total weight of the silicon raw material in the storage device 6 is the same, the rising speed / rising distance of the filling cylinder 1 is smaller when the particle size of the silicon raw material is smaller, and the rising speed / rising distance of the filling cylinder 1 is larger when the particle size of the silicon raw material is larger. For example, when the particle size of the silicon raw material is 10mm, the rising distance of the filling cylinder 1 is 15cm, and when the particle size of the silicon raw material is 70mm, the rising distance of the filling cylinder 1 is 30cm.

[0051] The filling device includes a support frame 8, on which the aforementioned storage device 6 is mounted. The refilling cylinder 4 is a cylindrical structure with openings at both ends and an internal storage space. Both openings of the refilling cylinder 4 are connected to the internal storage space. One end of the molybdenum rod 5 is connected to a quartz umbrella, which is located outside one end of the refilling cylinder 4. The molybdenum rod 5 passes through the inside of the refilling cylinder 4. During filling, the quartz umbrella contacts the end of the refilling cylinder 4, sealing that end of the refilling cylinder 4, so that the silicon raw material can be stored in the refilling cylinder 4. During refilling, the molybdenum rod 5 is driven to descend, and the quartz umbrella separates from the refilling cylinder 4 to perform silicon raw material refilling. When filling the refilling cylinder 4, the refilling cylinder 4 is set vertically, the storage device 6 is located above the refilling cylinder 4, and the filling cylinder 1 is also placed vertically. The discharge port of the filling cylinder 1 enters the interior of the refilling cylinder 4 through the opening end of the refilling cylinder 4 and is located inside the refilling cylinder 4. The filling cylinder 1 is preferably set coaxially with the refilling cylinder 4 to ensure that the molybdenum rod 5 is located between two adjacent buffers 2, to avoid interference between the buffers 2 and the molybdenum rod 5, and to ensure that the silicon raw material enters the filling cylinder 1 accurately.

[0052] like Figure 4-6 As shown, the lifting and lowering of the filling cylinder 1 can be achieved manually, through other drive structures, or in other ways, depending on the actual needs.

[0053] When the lifting and lowering of the filling cylinder 1 is controlled manually, a winch is installed on the support frame 8. The main rope of the winch is connected to the filling cylinder 1 through at least two branch ropes. One end of the multiple branch ropes is set along the circumferential direction of the filling cylinder 1, and the ends of the multiple branch ropes are all fixedly connected to the end of the filling cylinder 1 (for example, by setting a fixing ear at the end of the filling cylinder 1, the branch ropes pass through the connection hole on the fixing ear and are knotted for fixed connection), so that the filling cylinder 1 is evenly stressed during the lifting and lowering process. The other ends of the multiple branch ropes are all connected to the main rope. By turning the handle of the winch, the operator can reel in the main rope, and the filling cylinder 1 will rise accordingly. By turning the handle of the winch in the opposite direction, the operator can release the main rope, and the filling cylinder 1 will fall accordingly, thus realizing the lifting and lowering of the filling cylinder 1.

[0054] The filling device also includes a lifting component 7 connected to the filling cylinder 1. When the lifting component 7 is activated, it drives the filling cylinder 1 to move up and down. During the filling process, the outlet of the filling cylinder 1 is always positioned above the filling surface of the silicon raw material in the refilling cylinder 4. The outlet of the filling cylinder 1 does not come into contact with the silicon raw material in the refilling cylinder 4, so as to ensure the smooth filling of the refilling cylinder 4.

[0055] The aforementioned lifting assembly 7 is fixedly installed on the support frame 8. The lifting assembly 7 includes a power component 70, a rotating component 71 connected to the power component 70, a transmission component 72 disposed on the rotating component 71, and a connecting component 73. The connecting component 73 is wound around the transmission component 72 and is connected to the filling cylinder 1. The power component 70 drives the rotating component 71 to rotate, and the transmission component 72 rotates with the rotating component 71. When the transmission component 72 rotates, the connecting component 73 retracts the wire. The end of the connecting component 73 connected to the filling cylinder 1 moves upward, thereby causing the filling cylinder 1 to rise. When the power component 70 drives the rotating component 71 to rotate in the opposite direction, the transmission component 72 rotates in the opposite direction with the rotating component 71. When the transmission component 72 rotates in the opposite direction, the connecting component 73 releases the wire, the connecting component 73 is released, and the end of the connecting component 73 connected to the filling cylinder 1 moves downward, thereby causing the filling cylinder 1 to descend.

[0056] The aforementioned power component 70 is preferably a servo motor.

[0057] The rotating component 71 mentioned above is preferably a rotating shaft, which is rotatably mounted on the support frame 8 via a bearing seat, and one end of the rotating shaft is connected to the output shaft of the power component 70 via a coupling.

[0058] The aforementioned transmission component 72 is a cable reel, which is fixedly mounted on the rotating shaft. The cable reel is coaxial with the rotating shaft and rotates as the rotating shaft rotates.

[0059] The aforementioned connector 73 is a rope. The rope is wound around a spool, and the free end of the rope is fixedly connected to the outer wall of the filling cylinder 1. A connecting ear is provided on the outer wall of the filling cylinder 1. The free end of the rope is wound around the connecting ear and knotted to achieve a fixed connection between the rope and the filling cylinder 1. The filling cylinder 1 can be raised or lowered by the winding or unwinding of the rope.

[0060] In order to ensure that the filling cylinder 1 is subjected to balanced forces during the lifting process, the number of lifting components 7 is at least two. The connecting parts 73 of the two lifting components 7 are symmetrically arranged on the same radial side of the filling cylinder 1, so that the same radial side of the filling cylinder 1 is the force point, thereby ensuring that the filling cylinder 1 is subjected to balanced forces.

[0061] Of course, the lifting component 7 can also be a pneumatic cylinder structure or a hydraulic cylinder structure. The structure of the lifting component 7 can be selected according to actual needs, and no specific requirements are made here.

[0062] In some feasible embodiments, the buffer 2 described above can be fixedly connected to the filling cylinder 1. One end of each buffer 2 is fixedly connected to the filling cylinder 1, and the other end of each buffer 2 is inclined toward the outlet of the filling cylinder 1. Each buffer 2 is inclined, and the buffer 2 can be fixedly connected to the filling cylinder 1 by bolts or other connecting parts 73.

[0063] In this structure, a further optimized scheme is provided: a sliding component is provided inside the filling cylinder 1, which can move along the axial direction of the filling cylinder 1. The buffer 2 is fixedly connected to the sliding component, so that the buffer 2 can move with the sliding component. The fixed connection method between the buffer 2 and the sliding component is the same as the fixed connection method between the buffer 2 and the filling cylinder 1 mentioned above, and will not be described again here.

[0064] Alternatively, in some other feasible embodiments, the aforementioned buffer 2 is rotatably connected to the filling cylinder 1. The filling device further includes a rotation control component 3, which is connected to both the buffer 2 and the filling cylinder 1. When the rotation control component 3 is activated, it adjusts the buffer 2 to rotate closer to or further away from the side wall of the filling cylinder 1, fixing the buffer 2 at any angle. The rotation control component 3 allows adjustment of the rotation angle of the buffer 2 relative to the side wall of the filling cylinder 1, enabling the buffer 2 to move closer to or further away from the side wall of the filling cylinder 1 and to be fixed at any tilt angle. That is, the buffer 2 can be fixed... The buffer 2 is set at any angle between the buffer 2 and the side wall of the filling cylinder 1. For example, the angle at which the buffer 2 and the side wall of the filling cylinder 1 are in contact is set to 0°. The rotation control component 3 drives the buffer 2 to rotate away from the side wall of the filling cylinder 1. As needed, the buffer 2 can be positioned at any angle, such as 15°, 30°, 45°, etc., but the angle is less than 90° so that the buffer 2 is always in the direction of the free end facing the outlet of the filling cylinder 1. It is tilted at any angle. At the same time, the rotation of the buffer 2 can prevent the silicon raw material from getting stuck between the buffer 2 and the molybdenum rod 5 and causing blockage.

[0065] The aforementioned buffer 2 is rotatably connected to the side wall of the filling cylinder 1 via a rotating shaft. A mounting base is provided on the inner side wall of the filling cylinder 1, and the rotating shaft is rotatably mounted on the mounting base. By rotating the rotating shaft, the buffer 2 can rotate relative to the filling cylinder 1.

[0066] The aforementioned rotation control component 3 is fixedly installed on the side wall of the filling cylinder 1. The rotation control component 3 is connected to the buffer component 2. When the rotation control component 3 is activated, it drives the buffer component 2 to rotate. The rotation control component 3 includes at least one of a hydraulic cylinder assembly, a pneumatic cylinder assembly, and a motor assembly. That is, the rotation control component 3 can be a hydraulic cylinder assembly, a pneumatic cylinder assembly, or a motor assembly. Alternatively, the control component 3 can be used in combination of two of the hydraulic cylinder assembly, the pneumatic cylinder assembly, and the motor assembly. For example, the motor assembly and the hydraulic cylinder assembly can be used together. The motor assembly controls the rotation of the buffer component 2, and the hydraulic cylinder assembly supports the buffer component 2. The appropriate components can be selected according to actual needs.

[0067] When the rotation control component 3 is a motor component, the output shaft of the motor component is connected to the rotating shaft through a coupling. When the output shaft of the motor component rotates, it drives the buffer component 2 to rotate. Through the self-locking function of the motor component, the buffer component 2 can be fixed at any angle. The motor component can be fixedly connected to the side wall of the filling cylinder 1 through bolts or other connecting parts. In order to prevent the silicon raw material from contacting the motor component during the descent, a groove is provided on the inner wall of the filling cylinder 1. The motor component is fixedly installed in the groove, and a housing is provided on the outside of the motor component to protect the motor component. The housing can be fixedly connected to the inner wall of the filling cylinder 1 through bolts or other connecting parts.

[0068] When the rotation control component 3 is a hydraulic cylinder component or a pneumatic cylinder component, one end of the rotation control component 3 is fixedly connected to the side wall of the filling cylinder 1, and the telescopic rod of the rotation control component 3 is fixedly connected to the buffer 2. The rotation of the buffer 2 is realized by the extension and retraction of the telescopic rod, and the buffer 2 can be positioned at any angle by controlling the extension length of the telescopic rod. The buffer 2 is inclined toward the outlet of the filling cylinder 1, and the buffer 2 has a certain area. Therefore, the projection of the buffer 2 on the plane where the outlet is located has a certain area, and the projection of the buffer 2 on the side wall of the filling cylinder 1 along the axial direction of the filling cylinder 1 also has a certain area. In order to save the internal space of the filling cylinder 1 occupied by the rotation control component 3, the rotation control component 3 is fixedly connected to the position of the side wall of the filling cylinder 1 corresponding to the buffer 2. That is, the rotation control component 3 is fixedly connected to the projection of the buffer 2 on the side wall of the filling cylinder 1. The rotation control component 3 is located in the space between the side wall of the filling cylinder 1 and the buffer 2. The buffer 2 shields the rotation control component 3 to prevent the silicon raw material from contacting the rotation control component 3 during the falling process and causing damage to the rotation control component 3.

[0069] The motor assemblies, hydraulic cylinder assemblies, or pneumatic cylinder assemblies mentioned above are all commercially available products and can be selected according to actual needs. No specific requirements are specified here.

[0070] To ensure the normal operation of the motor assembly, hydraulic cylinder assembly, and pneumatic cylinder assembly, a through hole is provided at the corresponding position on the side wall of the filling cylinder 1. The cables of the motor assembly, the pipelines of the hydraulic cylinder assembly, and the pipelines of the pneumatic cylinder assembly are extended from the inside of the filling cylinder 1 to the outside of the filling cylinder 1, and then extend along the outer side wall of the filling cylinder 1 to the support frame 8, where they are connected to an external control device. The control device controls the operation of the motor assembly, hydraulic cylinder assembly, or pneumatic cylinder assembly.

[0071] In this structure, a further optimized solution is provided: a sliding component is provided inside the filling cylinder 1, which can move along the axial direction of the filling cylinder 1; the buffer 2 is rotatably connected to the sliding component, so that the buffer 2 can move with the sliding component 11; and the filling device also includes a rotation control component 3, which is connected to the buffer 2 and the sliding component respectively. When the rotation control component 3 is activated, it adjusts the buffer 2 to rotate to be close to or away from the side wall of the filling cylinder 1, fixing the buffer 2 at an angle. By controlling the lifting and lowering action of the sliding component, the buffer 2 and the rotation control component 3 can be raised and lowered with the lifting and lowering action of the sliding component, adjusting the position of each buffer 2 in the filling cylinder 1 so as to effectively buffer silicon raw materials of different particle sizes.

[0072] The aforementioned sliding assembly includes a sliding member 11 and a lifting assembly 10 connected together. Both the sliding member 11 and the lifting assembly 10 are located inside the filling cylinder 1. When the lifting assembly 10 is activated, it drives the sliding member 11 to move up and down. The sliding member 11 has a plate-like structure, and each sliding member 11 is connected to a lifting assembly 10. The shape of the sliding member 11 is adapted to the shape of the inner sidewall of the filling cylinder 1, so that the sliding member 11 can be clearance-fitted with the filling cylinder 1 and move along the axial direction of the filling cylinder 1. The connection method between the buffer member 2 and the sliding member 11 is the same as the connection method between the buffer member 2 and the sidewall of the filling cylinder 1, and will not be described in detail here.

[0073] The connection method between the rotation control component 3 and the sliding component 11 is the same as the connection method between the rotation control component 3 and the side wall of the filling cylinder 1. The difference is that the sliding component 11 is provided with a through hole. The cables of the motor component, the pipelines of the hydraulic cylinder component, and the pipelines of the pneumatic cylinder component extend through the through hole to the space between the sliding component 11 and the inner side wall of the filling cylinder 1. The cables of the motor component, the pipelines of the hydraulic cylinder component, and the pipelines of the pneumatic cylinder component extend along the inner side wall of the filling cylinder 1 in this space to the support frame 8 and connect to the control device. The control device controls the operation of the motor component, the hydraulic cylinder component, or the pneumatic cylinder component.

[0074] The aforementioned sliding member 11 can also be a ring structure. In this structure, the number of lifting components 10 is at least two, and multiple lifting components 10 are evenly arranged along the circumferential direction of the sliding member 11 so that the sliding member 11 is subjected to balanced force during the lifting process.

[0075] The aforementioned lifting assembly 10 includes a lifting rotating shaft, a rotating drum mounted on the lifting rotating shaft, and a rope. The rope is wound around the rotating drum, and the free end of the rope is connected to a sliding member 11. A through hole is provided at a corresponding position on the sliding member 11. The free end of the rope passes through the through hole and is knotted to connect the sliding member 11 and the rope together. The lifting rotating shaft is rotatably mounted on the support frame 8 through a bearing seat. The rotating drum is fixedly sleeved on the lifting rotating shaft. The rotating drum rotates with the rotation of the lifting rotating shaft to take in or release the rope, thereby raising or lowering the sliding member 11.

[0076] During the filling process, since the filling cylinder 1 needs to be gradually lifted upwards, the sliding component 11 also needs to be gradually lifted upwards. Therefore, it is necessary to control the lifting speed of the sliding component 11 to match the lifting speed of the filling cylinder 1 so that the buffer components 2 can effectively buffer the silicon raw material. The lifting rotating shaft is connected to the rotating component 71 through a gear transmission structure. By setting the transmission ratio of the gear transmission structure, the rising speed of the filling cylinder 1 and the sliding component 11 can be controlled. The rising speed of the sliding component 11 can be the same as the rising speed of the filling cylinder 1. At this time, the sliding component 11 and the filling cylinder 1... The sliding member 11 can remain relatively stationary, or the upward speed of the sliding member 11 can be different from that of the filling cylinder 1. In this case, the sliding member 11 moves relative to the filling cylinder 1. The setting can be selected according to the total weight of the silicon raw material in the storage device 6 and the particle size of the silicon raw material. For example, for the same weight of silicon raw material in the storage device 6, when the particle size of the silicon raw material is small (e.g., 10 mm), the upward speed of the sliding member 11 is less than the upward speed of the filling cylinder 1. When the particle size of the silicon raw material is large (e.g., 70 mm), the upward speed of the sliding member 11 is greater than the upward speed of the filling cylinder 1.

[0077] like Figure 7 and 8 As shown, the filling device also includes a gathering component 9. One end of the gathering component 9 is set to always be close to the inlet of the filling cylinder 1, and the other end is used to connect to the inlet side of the storage device 6 or the refilling cylinder 4. The gathering component 9 is set to prevent the silicon raw material flowing out of the storage device 6 from falling outside the refilling cylinder 4 and causing the silicon raw material to be contaminated.

[0078] The aforementioned gathering component 9 is a telescopic tube structure. Utilizing the telescopic and folding function of this structure, one end of the gathering component 9 is connected to the discharge end of the storage device 6, and the other end is fitted into the inlet of the filling cylinder 1. The silicon raw material in the storage device 6 can directly enter the filling cylinder 1 along the gathering component 9. In some feasible embodiments, this telescopic tube structure is preferably a corrugated pipe, a commercially available product, selected according to actual needs.

[0079] Alternatively, the aforementioned gathering component 9 can be a tubular structure with one end opening larger than the other. The inner diameter of the smaller opening of the gathering component 9 is smaller than the inner diameter of the inlet of the filling cylinder 1. The smaller opening of the gathering component 9 corresponds to the inlet of the filling cylinder 1, and the outer diameter of the smaller opening of the gathering component 9 is adapted to the inner diameter of the inlet of the filling cylinder 1, so that the smaller opening of the gathering component 9 can be inserted into the inlet of the filling cylinder 1, or the smaller opening of the gathering component 9 can contact and fit with the inlet of the filling cylinder 1. The larger opening of the gathering component 9 is connected to the outlet side of the storage device 6, or the larger opening of the gathering component 9 is connected to the inlet side of the refilling cylinder 4. This connection can be achieved by hook snapping, so that the silicon raw material in the storage device 6 can enter the filling cylinder 1 along the gathering component 9.

[0080] In some feasible embodiments, the buffer 2, the filling cylinder 1, and the gathering assembly 9 are all made of polyurethane.

[0081] A filling device includes a storage device 6 and a filling device as described above. The discharge end of the storage device 6 is matched with the inlet of the filling cylinder 1 in the filling device so that the silicon raw material in the storage device 6 enters the filling cylinder 1.

[0082] When the filling equipment is in use, the filling cylinder 1 is connected to the lifting component 7, the storage device 6 is set on the support frame 8, the filling cylinder 1 is suspended below the storage device 6, the refilling cylinder 4 is placed vertically on the ground below the storage device 6, the outlet of the filling cylinder 1 is located inside the refilling cylinder 4, and the filling cylinder 1 and the refilling cylinder 4 are coaxially arranged. The buffer 2 is rotatably connected to the filling cylinder 1 through the rotation control component 3. When the rotation control component 3 moves, the buffer 2 moves away from the side wall of the filling cylinder 1. When the buffer 2 reaches the preset angle (e.g., 45°), the rotation control component 3 stops moving and positions the buffer 2 at that angle. The large end of the gathering component 9 is engaged with the feed end side of the refilling cylinder 4, and the small end of the gathering component 9 is aligned with the feed inlet of the filling cylinder 1.

[0083] Based on the particle size of the silicon raw material in the storage device 6 and the total weight of the silicon raw material in the storage device 6, the rotation speed of the power component 70 of the lifting assembly 7 is set, thereby setting the rising speed of the filling cylinder 1.

[0084] The filling cylinder 1 is lowered to near the quartz umbrella of the refilling cylinder 4. The discharge end of the storage device 6 opens, and the silicon raw material enters the filling cylinder 1 through the inlet along the gathering assembly 9. The silicon raw material falls freely inside the filling cylinder 1, and during its descent, it contacts the buffer members 2 arranged along the axial direction of the filling cylinder 1 in sequence. The buffer members 2 cushion the silicon raw material, reducing the force of its descent and shortening the distance of its free fall, so that the silicon raw material falls into the refilling cylinder 4 with a smaller impact force. During the filling process, the filling cylinder 1 gradually rises, so that the silicon raw material is laid layer by layer in the refilling cylinder 4. Because the silicon raw material falls into the refilling cylinder 4 with a smaller impact force, During the descent of the silicon raw material, there is a stress relief process, which reduces the force applied to the silicon raw material in contact with it inside the re-feeding cylinder 4. This prevents the silicon raw material from being compacted inside the re-feeding cylinder 4 and also prevents it from being squeezed by a large force, thus avoiding jamming of the molybdenum rod 5. This allows the molybdenum rod 5 to descend easily during the re-feeding process, and the compressive force between the layer of silicon raw material in contact with the quartz umbrella is small. It can easily slide down along the opening gap between the quartz umbrella and the re-feeding cylinder 4 and fall into the quartz crucible. This prevents the bottom of the re-feeding cylinder 4 from cracking due to the opening action of the quartz umbrella, extends the service life of the re-feeding cylinder 4 and the quartz umbrella, and achieves a zero-jamming phenomenon during the re-feeding process of silicon raw material.

[0085] If silicon material gets stuck between the buffer 2 and the molybdenum rod 5 during the filling process, the drive rotation control component 3 will rotate, causing the buffer 2 to fall. The drive rotation control component 3 will then be activated again, causing the buffer 2 to return to its original position, thus preventing material blockage during the filling process.

[0086] Due to the adoption of the above technical solution, the filling device is equipped with a filling cylinder and a buffer component installed inside the filling cylinder. The buffer component is inclined towards the outlet of the filling cylinder. The buffer component cushions the silicon raw material falling inside the filling cylinder, weakening the force of the silicon raw material's descent. The filling cylinder allows the silicon raw material in the storage device to fall into the refilling cylinder along the filling cylinder, guiding it during the descent. Multiple buffer components are staggered along the axial direction of the filling cylinder, so that the silicon raw material is cushioned by multiple buffer components during its descent, shortening the free fall distance of the silicon raw material. This allows the silicon raw material to fall into the refilling cylinder with a smaller impact force. The force exerted by the silicon raw material on the silicon raw material in contact with it in the refilling cylinder is smaller, avoiding the compaction of the silicon raw material falling into the refilling cylinder. The squeezing force between the silicon raw materials is reduced, preventing the molybdenum rod from being squeezed and fixed inside the refilling cylinder. This allows the molybdenum rod to descend during refilling. It also allows the layer of silicon raw material in contact with the quartz umbrella to flow out from between the refilling cylinder and the quartz umbrella as the umbrella opens. The material slides out through the gap and falls into the refilling cylinder, preventing the refilling cylinder from cracking, ensuring smooth refilling, avoiding impact on single crystal formation, and extending the service life of the refilling cylinder and quartz umbrella. During the filling process, the filling cylinder can rise relative to the refilling cylinder, and the outlet of the filling cylinder is always above the filling surface of the silicon material in the refilling cylinder, avoiding contact between the outlet of the filling cylinder and the silicon material, shortening the free fall distance of the silicon material, and preventing the filling cylinder from getting stuck in the refilling cylinder during the filling process, ensuring the filling efficiency. The buffer can rotate relative to the filling cylinder, so that the angle of the buffer relative to the side wall of the filling cylinder is adjustable, and the buffer can be positioned at any angle, so that the buffer can buffer the silicon material. When the silicon material is stuck between the buffer and the molybdenum rod, the buffer can rotate to allow the silicon material to fall, ensuring the filling efficiency. The setting of the gathering component ensures that the silicon material flowing out of the storage device enters the filling cylinder and does not fall outside the refilling cylinder, avoiding contamination of the silicon material.

[0087] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A filling apparatus, characterized by: The device includes a filling cylinder and at least one buffer member disposed inside the filling cylinder. The outer diameter of the filling cylinder is smaller than the inner diameter of the refilling cylinder. The filling cylinder is provided with an inlet for connecting to a storage device and an outlet for discharging material into the refilling cylinder. The buffer member is configured to be inclined toward the outlet.

2. The filling apparatus of claim 1, wherein: The filling cylinder is configured to move relative to the refilling cylinder.

3. The filling apparatus of claim 2, wherein: The filling device also includes a lifting component connected to the filling cylinder. The lifting component is activated to drive the filling cylinder to move up and down. During the filling process, the outlet of the filling cylinder is always positioned above the filling surface of the silicon raw material in the refilling cylinder.

4. The filling apparatus of claim 1, wherein: It also includes a rotation control component. The buffer is rotatably connected to the filling cylinder. The rotation control component is connected to both the buffer and the filling cylinder. When the rotation control component is activated, it adjusts the buffer to rotate to be close to or away from the side wall of the filling cylinder, and fixes the buffer at any angle.

5. The filling apparatus of claim 3, wherein: It also includes a sliding assembly that can move along the axial direction of the filling cylinder, and the buffer is rotatably connected to the sliding assembly; as well as The filling device also includes a rotation control component, which is connected to the buffer and the sliding component respectively. When the rotation control component is activated, it adjusts the buffer to rotate to be close to or away from the side wall of the filling cylinder, and fixes the buffer at any angle.

6. A filling device according to claim 4 or 5, characterised in that: The rotation control assembly includes at least one of a hydraulic cylinder assembly, a pneumatic cylinder assembly, and a motor assembly.

7. A filling device according to any one of claims 1-5, characterised in that: The plurality of the buffer elements are arranged alternately along the axial direction of the filling cylinder.

8. The filling apparatus of claim 1, wherein: The filling device also includes a gathering component, one end of which is always positioned close to the feed inlet, and the other end is used to connect to the feed end of the storage device or the refilling cylinder.

9. The filling apparatus of claim 8, wherein: The gathering component is a telescopic tube structure, or the gathering component is a tube structure with one end opening larger than the other end opening size, and the inner diameter of the smaller opening end of the gathering component is smaller than the inner diameter of the feed inlet.

10. A direct fill material charging apparatus, comprising: It includes a storage device and a filling device as described in any one of claims 1-9, wherein the discharge end of the storage device is matched with the inlet of the filling cylinder in the filling device.

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