Winding device and silicon core furnace

Abstract

The utility model discloses a winding device which comprises a winding mechanism, the winding mechanism comprises a guide part, the guide part is of a cone or circular truncated cone structure, and the circumferential side face of the guide part is used for guiding a motor wire; the wire winding part and the guide part are coaxially arranged, the top surface of the wire winding part and the bottom surface of the guide part coincide and are connected, and the circumferential side surface of the wire winding part is used for winding a motor wire; in the vertical direction, the projection of the top face of the winding part coincides with the projection of the bottom face of the winding part, or the projection of the top face of the winding part is located in the projection of the bottom face of the winding part. According to the winding device provided by the invention, when the motor ascends, the motor wire moves downwards along the guide part on the winding mechanism and diffuses outwards at the same time, so that the motor wire falls on the peripheral side surface of the winding part in a stretched state, and the knotting probability of the motor wire can be reduced; a larger winding space can be provided for the motor wire, and the motor wire is prevented from being stacked on the guide part and knotted.

Description

Technical Field

[0001] The present application relates to the technical field of silicon core production equipment, and in particular to a winding device and a silicon core furnace. Background Art

[0002] Silicon cores are mainly used in the production of high-purity polysilicon. The silicon cores used in the photovoltaic field are mostly produced by the direct pulling method to first produce multi-wafer rods, and then cut the multi-wafer rods into square silicon cores. At present, in order to improve the production efficiency of silicon cores, the industry has begun to try to pull multiple seed crystals at a time to pull multiple multi-wafer rods in the same furnace.

[0003] When the silicon core is drawn, it is necessary to control the rotation of multiple seed crystals on the support along their respective central axes, and it is also necessary to control the lifting of the support to drive the multiple seed crystals on the support to lift in the vertical direction.

[0004] When controlling the lifting and lowering of the bracket, the motor installed on the bracket for driving the seed crystal to rotate will also rise and fall with the bracket. The motor wire that supplies power to the motor is prone to getting tangled during the lifting process, thereby affecting the pulling work of the multi-wafer rod. Utility Model Content

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a winding device and a silicon core furnace to solve the problem that the motor wire is easily tangled during the motor lifting process.

[0006] In a first aspect, the present application provides a winding device, comprising: a winding mechanism, wherein the winding mechanism comprises:

[0007] A guide portion, wherein the guide portion is a conical or truncated cone structure, and the peripheral side surface of the guide portion is used to guide the motor wire;

[0008] A winding portion, wherein the winding portion is coaxially arranged with the guide portion, the top surface of the winding portion overlaps and is connected with the bottom surface of the guide portion, and the peripheral side surface of the winding portion is used for winding the motor wire;

[0009] In the vertical direction, the projection of the top surface of the winding portion coincides with the projection of the bottom surface of the winding portion, or the projection of the top surface of the winding portion is located within the projection of the bottom surface of the winding portion.

[0010] Based on the winding device, when the motor rises, the motor wire will move downward along the guide part on the winding mechanism and spread outward at the same time, so that the motor wire falls on the peripheral side surface of the winding part in a stretched state, thereby reducing the probability of the motor wire becoming tangled. Through the setting of the winding part, a larger winding space can be provided for the motor wire, thereby preventing the motor wire from accumulating on the guide part and becoming tangled.

[0011] Optionally, the winding portion is a truncated cone structure.

[0012] By setting the winding part into a truncated cone structure, gravity and the inclined surface formed on the peripheral side of the winding part can be used to guide the motor wire, so that the motor wire gradually spreads toward the outer peripheral side, thereby reducing the probability of knotting. At the same time, it can also increase the surface area of ​​the winding part and improve the winding capacity of the winding part.

[0013] Optionally, a spiral receiving groove is provided on the peripheral side surface of the winding portion.

[0014] Optionally, a receiving space for receiving the motor is provided inside the winding mechanism, and a wire passing hole is provided at the bottom of the winding portion.

[0015] Based on the above-mentioned accommodation space, the coaxial arrangement of the motor and the winding mechanism can be realized, and the motor can also be isolated and protected at the same time. Through the arrangement of the above-mentioned wire hole, one end of the motor wire for connecting to the motor can pass through.

[0016] Optionally, the winding device also includes a wire pressing block arranged near the wire passing hole.

[0017] Based on the setting of the above-mentioned wire pressing block, the end of the motor wire close to the wire hole can be fixed, so that the motor wire located at the bottom of the winding part is as close to the horizontal plane as possible, avoiding the situation that the part of the motor wire close to the bottom of the winding part is warped upward, the multiple layers of motor wires on the winding part are superimposed and wrapped in the radial direction of the winding part, and the motor wire is knotted.

[0018] Optionally, the winding device further comprises an isolating cylinder coaxially sleeved on the outside of the winding mechanism, and a containing space for accommodating the motor wire is formed between the isolating cylinder and the winding mechanism.

[0019] The isolation cylinder is located on the outside of the winding mechanism, which can confine the motor wire within the accommodating space and prevent the motor wire from extending too much outward, thereby reducing the probability of the motor wire being tangled. The isolation cylinder can also block the motor wire and prevent the motor wire from spreading too far outward and affecting the operation of the structure outside the isolation cylinder.

[0020] Optionally, the winding device further includes a plurality of counterweights spaced apart on the motor wire.

[0021] Based on the multiple counterweights arranged at intervals as mentioned above, the counterweights arranged at intervals will drive the motor wires near them to slide quickly and smoothly toward the outer edge of the guide part, and then smoothly transition from the outer edge of the guide part to the outer peripheral side of the winding part below, further reducing the probability of the motor wires getting tangled during the winding process.

[0022] In a second aspect, the present application provides a silicon core furnace, comprising a bracket, a motor and a winding device as described above, wherein the winding mechanism is arranged on the bracket, and the bracket can be raised and lowered in the silicon core furnace, and the motor is arranged inside the winding mechanism. In the vertical direction, when the bracket rises, the motor wire is wound around the winding part with the help of the gravity of the counterweight block and the peripheral side surface of the guide part.

[0023] Based on the above-mentioned silicon core furnace, when the winding mechanism in the silicon core furnace rises, one end of the motor wire used to connect the motor will rise along with the motor on the winding mechanism, and the motor wire close to the winding part will begin to accumulate layer by layer on the peripheral side surface of the winding part under the guidance of the peripheral side surface of the winding part, and the motor wire located above the guide part will fall on the peripheral side surface of the guide part under the action of the counterweight block and the motor wire's own gravity. The counterweight blocks arranged at intervals will drive the motor wires near them to slide quickly and smoothly toward the outer edge of the guide part, and then smoothly transition from the outer edge of the guide part to the outer peripheral side of the winding part below, and fall on the upper layer of the motor wire that has been wound on the outer peripheral side of the winding part. The whole process can significantly reduce the probability of the motor wires getting tangled during the rising process of the motor.

[0024] Optionally, the silicon core furnace further includes a plurality of first partitions spaced apart in the vertical direction, wherein the first partitions are arranged below the bracket, and avoidance holes are provided on the first partitions, wherein the avoidance holes are used for the connection rope to pass through.

[0025] Optionally, the motor is a vacuum motor.

[0026] One or more of the above embodiments of the present application have at least one or more of the following beneficial effects:

[0027] When the motor rises, the motor wire will move downward along the guide part on the winding mechanism and spread outward at the same time, so that the motor wire falls on the peripheral side of the winding part in a stretched state, thereby reducing the probability of the motor wire becoming tangled. Through the setting of the winding part, a larger winding space can be provided for the motor wire, thereby preventing the motor wire from accumulating on the guide part and becoming tangled.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The disclosure of the present application will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0030] Figure 1This is a schematic diagram of the structure inside the silicon core furnace in one of the embodiments of the present application;

[0031] Figure 2 This is a schematic diagram of the structure in which a winding device in one embodiment of the present application is arranged on a bracket;

[0032] Figure 3 This is a schematic diagram of the structure in which a motor is arranged on a bracket in one embodiment of the present application;

[0033] Figure 4 This is a schematic diagram of the structure of a winding part of a winding mechanism in one embodiment of the present application winding a motor wire;

[0034] Figure 5 It is a schematic structural diagram of the winding portion of the winding mechanism in one of the embodiments of the present application.

[0035] Description of Reference Numerals

[0036] 1. Winding mechanism; 11. Guide part; 12. Winding part; 121. Spiral receiving groove; 122. Wire hole; 13. Wire pressing block; 14. Isolation cylinder; 15. Counterweight; 21. Connecting rope; 22. Molybdenum weight; 23. Seed crystal; 31. First partition; 311. Avoidance hole; 32. Second partition; 321. Limiting groove; 4. Motor; 5. Bracket; 6. Connecting column. DETAILED DESCRIPTION

[0037] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0038] At present, when pulling silicon cores, it is necessary to control the rotation of multiple seed crystals on the support along their respective central axes, and at the same time, it is necessary to control the lifting of the support to drive the multiple seed crystals on the support to lift in the vertical direction. When controlling the lifting of the support, the motor installed on the support for driving the rotation of the seed crystal will also lift with the support. The motor wire that powers the motor is easy to get tangled during the lifting process, which in turn affects the pulling of multiple wafer rods.

[0039] Based on this, the present application provides a winding device. When the motor rises, the motor wire will move downward along the guide part on the winding mechanism and spread outward at the same time, so that the motor wire falls on the peripheral side of the winding part in a stretched state, thereby reducing the probability of the motor wire getting tangled. Through the setting of the winding part, a larger winding space can be provided for the motor wire, thereby preventing the motor wire from accumulating on the guide part and getting tangled.

[0040] The present application will be described in detail below through specific embodiments.

[0041] Reference Figures 1 to 5 As shown, in the first aspect, the present embodiment provides a winding device, comprising: a winding mechanism 1, the winding mechanism 1 comprising: a guide portion 11, the guide portion 11 is a conical or truncated cone structure, and the peripheral side surface of the guide portion 11 is used to guide the motor wire; a winding portion 12, the winding portion 12 is coaxially arranged with the guide portion 11, the top surface of the winding portion 12 coincides with and is connected to the bottom surface of the guide portion 11, and the peripheral side surface of the winding portion 12 is used to wind the motor wire; in the vertical direction, the projection of the top surface of the winding portion 12 coincides with the projection of the bottom surface of the winding portion 12, or, the projection of the top surface of the winding portion 12 is located within the projection of the bottom surface of the winding portion 12.

[0042] When the winding device rises as a whole, one end of the motor wire used to connect the motor 4 will rise together with the motor 4 on the winding device, and the motor wire close to the winding portion 12 will begin to accumulate layer by layer on the peripheral side surface of the winding portion 12 under the guidance of the peripheral side surface of the winding portion 12, and the motor wire located above the guide portion 11 will fall on the peripheral side surface of the guide portion 11 under the action of gravity, and then slide toward the outer edge of the guide portion 11 under the guidance of the peripheral side surface of the guide portion 11, and then smoothly transition from the outer edge of the guide portion 11 to the outer peripheral side of the winding portion 12 below, and fall on the upper layer of the motor wire that has been wound on the outer peripheral side of the winding portion 12.

[0043] In the winding device provided in this embodiment, when the motor 4 rises, the motor wire will move downward along the guide portion 11 on the winding mechanism 1 and spread outward at the same time, so that the motor wire falls on the peripheral side surface of the winding portion 12 in a stretched state, thereby reducing the probability of the motor wire being tangled. Through the setting of the winding portion 12, a larger winding space can be provided for the motor wire, thereby preventing the motor wire from accumulating on the guide portion 11 and becoming tangled.

[0044] Continue to refer to Figure 4 and Figure 5 As shown, in some embodiments, the winding portion 12 is a truncated cone structure, that is, in the vertical direction, the projection of the top surface of the winding portion 12 is located within the projection of the bottom surface of the winding portion 12, and the top surface and the bottom surface of the winding portion 12 are coaxially arranged; by arranging the winding portion 12 into a truncated cone structure, it is possible to utilize gravity and the inclined surface formed on the peripheral side surface of the winding portion 12 to guide the motor wire, so that the motor wire gradually spreads toward the outer peripheral side, thereby reducing the probability of knotting, and at the same time, it is also possible to increase the surface area of ​​the winding portion 12 and improve the winding capacity of the winding portion 12. In a special case of some of the above-mentioned embodiments, the slope of the inclined surface of the truncated cone of the winding portion 12 may also be the same as the slope of the inclined surface of the guide portion 11, that is, the winding portion 12 and the guide portion 11 together form a large conical structure or truncated cone structure.

[0045] Continue to refer to Figure 2As shown, in other embodiments, the winding portion 12 is a cylindrical structure, that is, in the vertical direction, the projection of the top surface of the winding portion 12 coincides with the projection of the bottom surface of the winding portion 12, and the top surface and the bottom surface of the winding portion 12 are coaxially arranged; by setting the winding portion 12 to a cylindrical structure, the motor wire at the end can fall directly around the bottom of the winding portion 12, and then be stacked upward layer by layer. The surface friction between the motor wire and the winding portion 12 is small, which can further reduce the probability of the motor wire being tangled.

[0046] Furthermore, a spiral receiving groove 121 is provided on the circumferential side of the winding portion 12; specifically, when the motor wire falls from above, it will first spread to the outer circumferential side of the top surface of the winding portion 12 through the guide portion 11, and then slide downward along the outer circumferential side of the winding portion 12. During the sliding process, the end of the motor wire connected to the motor 4 will first slide along the outer circumferential side of the winding portion 12 to the bottom of the winding portion 12, and the rear motor wire will begin to accumulate in the spiral receiving groove 121 along the spiral shape. That is to say, although the spiral receiving groove 121 is provided on the circumferential side of the winding portion 12, when there is no motor wire wound in the groove near the bottom of the spiral receiving groove 121, this layer of the spiral receiving groove 121 will not hold the motor wire in the process of the motor wire sliding downward. The machine wire is stuck in the spiral receiving groove 121 of this layer, and the motor wire will only begin to gradually slide into the spiral receiving groove 121 from bottom to top after the end is accumulated on the bracket 5 at the bottom of the winding part 12. In other words, the spiral receiving groove 121 requires the cooperation of part of the upper surface of the motor wire accumulated in the next layer to form a complete spiral receiving groove 121 for accommodating and fixing the motor wire. It should be understood that the accumulation of the motor wire in the next layer of spiral receiving groove 121 can make the motor wire stay in the spiral receiving groove 121 of this layer; the opening of the spiral receiving groove 121 can improve the stability of the motor wire on the winding part 12, and the motor wire can be wound and fixed along the spiral receiving groove 121 on the winding part 12, thereby reducing the occurrence of knotting.

[0047] Continue to refer to Figure 2 As shown, in some optional embodiments, a accommodating space for accommodating the motor 4 is provided inside the winding mechanism 1, and a wire passing hole 122 is provided at the bottom of the winding portion 12; through the accommodating space provided inside the winding mechanism 1, the coaxial arrangement of the motor 4 and the winding mechanism 1 is realized, and at the same time, the motor 4 can be isolated and protected, and through the setting of the wire passing hole 122, one end of the motor line for connecting to the motor 4 can be allowed to pass through, specifically, the wire passing hole 122 can be provided at the bottom of the side surface of the winding portion 12, that is, the wire passing hole 122 is provided on the peripheral side surface of the winding portion 12, and is located at the connection between the peripheral side surface of the winding portion 12 and the bottom surface of the winding portion 12.

[0048] Continue to refer to Figure 2As shown, in some embodiments, the winding device also includes a wire pressing block 13 arranged near the wire passing hole 122; through the setting of the wire pressing block 13, the end of the motor wire close to the wire passing hole 122 can be fixed, so that the motor wire located at the bottom of the winding part 12 is as close to the horizontal plane as possible, so that when the motor wire slides downward, the motor wire located at the bottom of the winding part 12 is wound around the winding part 12 along the outer peripheral side of the winding part 12, thereby avoiding the situation that the part of the motor wire close to the bottom of the winding part 12 is warped upward, the multiple layers of motor wire on the winding part 12 are superimposed and wound in the radial direction of the winding part 12, and the motor wire is knotted.

[0049] Continue to refer to Figure 1 As shown, in some embodiments, the winding device also includes an isolation cylinder 14 coaxially sleeved on the outside of the winding mechanism 1, and a accommodating space for accommodating the motor wire is formed between the isolation cylinder 14 and the winding mechanism 1; the isolation cylinder 14 is located on the outside of the winding mechanism 1, and can confine the motor wire within the accommodating space to prevent the motor wire from extending outward too much, thereby reducing the probability of the motor wire being tangled, and the isolation cylinder 14 can also form a blocking effect on the motor wire to prevent the motor wire from spreading outward too much and affecting the operation of the structure outside the isolation cylinder 14.

[0050] Furthermore, the top of the isolation tube 14 is higher than the top surface of the winding portion 12, so that when the motor wire diffuses outward and slides too quickly under the guidance of the guide portion 11 and flies far away, the isolation tube 14 can be used to block and limit the motor wire sliding downward from the guide portion 11.

[0051] Continue to refer to Figure 2 As shown, in some embodiments, the winding device further includes a plurality of counterweights 15 arranged at intervals on the motor wire, wherein the counterweight 15 may be an annular structure sleeved on the motor wire. The counterweight 15 may increase its own weight by extending its length in the extending direction of the motor wire, and such a design may also reduce the thickness of the counterweight 15 in the radial direction of the motor wire.

[0052] Specifically, the counterweight 15 can be made of a deformable soft material, so that the counterweight 15 can deform accordingly following the deformation of the motor wire, thereby allowing the counterweight 15 to more smoothly follow the motor wire and be wound around the winding part 12 and the guide part 11, reducing the probability of the motor wire becoming tangled during the winding process.

[0053] Furthermore, the outer surface of the counterweight 15 can be smoothed, so that by increasing the weight of the motor wire near each counterweight 15, the motor wire is easier to fall and slide, and the friction between the guide part 11 and the winding part 12 and the motor wire can be reduced, so that the motor wire can slide more smoothly from the guide part 11 and the winding part 12, thereby further reducing the probability of the motor wire getting tangled during the winding process.

[0054] Specifically, when the winding device rises, one end of the motor wire used to connect the motor 4 will rise together with the motor 4 on the winding device, and the motor wire close to the winding portion 12 will begin to accumulate layer by layer on the peripheral side surface of the winding portion 12 under the guidance of the peripheral side surface of the winding portion 12, and the motor wire located above the guide portion 11 will fall on the peripheral side surface of the guide portion 11 under the action of the counterweight block 15 and the motor wire's own gravity. The counterweight blocks 15 arranged at intervals will drive the motor wires near them to slide quickly and smoothly toward the outer edge of the guide portion 11, and then smoothly transition from the outer edge of the guide portion 11 to the outer peripheral side of the winding portion 12 below, and fall on the upper layer of the motor wire that has been wound on the outer peripheral side of the winding portion 12.

[0055] In some embodiments, a chamfer structure is provided at the connection between the guide portion 11 and the winding portion 12 for a smooth transition. The chamfer structure can be a rounded corner or an oblique angle, as long as it can ensure that the motor wire can slide smoothly from the guide portion 11 to the outer peripheral side of the winding portion 12.

[0056] In the second aspect, the present application provides a silicon core furnace, which includes a bracket 5, a motor 4 and a winding device as described above. The winding mechanism 1 is arranged on the bracket 5, and the bracket 5 is arranged in the silicon core furnace in a liftable manner. The motor 4 is arranged inside the winding mechanism 1. In the vertical direction, when the bracket 5 rises, the motor wire is wound on the winding part 12 with the help of the counterweight block 15 and the gravity of the motor wire itself and the guiding action of the surrounding side surface of the guide part 11.

[0057] Specifically, when the winding device rises, one end of the motor wire used to connect the motor 4 will rise together with the motor 4 on the winding device, and the motor wire close to the winding portion 12 will begin to accumulate layer by layer on the peripheral side surface of the winding portion 12 under the guidance of the peripheral side surface of the winding portion 12, and the motor wire located above the guide portion 11 will fall on the peripheral side surface of the guide portion 11 under the action of the counterweight block 15 and the motor wire's own gravity. The counterweight blocks 15 arranged at intervals will drive the motor wires near them to slide quickly and smoothly toward the outer edge of the guide portion 11, and then smoothly transition from the outer edge of the guide portion 11 to the outer peripheral side of the winding portion 12 below, and fall on the upper layer of the motor wire that has been wound on the outer peripheral side of the winding portion 12.

[0058] Continue to refer to Figures 1 to 3As shown, further, the silicon core furnace also includes a plurality of first partitions 31 arranged at intervals in the vertical direction, the first partitions 31 are arranged below the bracket 5, and the first partitions 31 are provided with avoidance holes 311, and the avoidance holes 311 are used for the connection rope 21 to pass through; the first partitions 31 adjacent to the bracket 5 and the bracket 5, and the adjacent first partitions 31 are connected by connecting columns 6, and the setting of the connecting columns 6 can ensure the stability of the relative position between each layer of the first partitions 31, ensure the relative distance between adjacent first partitions 31, and also can fix all the first partitions 31 in series; the first partitions 31 are provided with avoidance holes 311 corresponding to the seed crystals 23 one by one; by setting multiple layers of first partitions 31, the heat conduction path can be extended to prevent excessive temperature from damaging the motor 4; wherein the avoidance holes 311 can allow the connection rope 21 connecting the seed crystals 23 to pass through.

[0059] Specifically, the connecting rope 21 may be a tungsten wire rope, or a rope structure made of other high-strength materials that are resistant to high temperatures.

[0060] In some embodiments, the connecting columns 6 between the first partitions 31 adjacent to the bracket 5 and the bracket 5, and the connecting columns 6 between adjacent first partitions 31 are staggered in the vertical projection; it should be noted that the high temperature at the position of the seed crystal 23 will gradually transfer upward through the first partitions 31 and the connecting columns 6. By staggering the connecting columns 6 of each layer, the staggered setting of the connecting columns 6 can be used to extend the heat transfer path, thereby delaying the rate at which heat is transferred from the bottom first partition 31 to the motor 4 located at the center position above the top first partition 31, thereby better protecting the motor 4; the staggered setting of the connecting columns 6 of each layer can also make the overall structure formed by all the first partitions 31 connected by the connecting columns 6 more stable, and the overall structure formed by connecting all the first partitions 31 has more connection points, and each connection point restricts each other, so that the overall structure formed by connecting all the first partitions 31 through the connecting columns 6 can also be more stable when following the bracket 5 to perform rising and falling movements.

[0061] In some embodiments, the motor 4 is a vacuum motor, which is more resistant to high temperatures and has higher reliability. Such a configuration can ensure the reliability and stability of the entire silicon core furnace when pulling the seed crystal 23 .

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0064] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A winding device, characterized in that: include: A winding mechanism, the winding mechanism comprising: A guide portion, wherein the guide portion is a conical or truncated cone structure, and the peripheral side surface of the guide portion is used to guide the motor wire; A winding portion, wherein the winding portion is coaxially arranged with the guide portion, the top surface of the winding portion overlaps and is connected with the bottom surface of the guide portion, and the peripheral side surface of the winding portion is used for winding the motor wire; In the vertical direction, the projection of the top surface of the winding portion coincides with the projection of the bottom surface of the winding portion, or the projection of the top surface of the winding portion is located within the projection of the bottom surface of the winding portion.

2. The winding device according to claim 1, characterized in that The winding part is a truncated cone structure.

3. The winding device according to claim 2, characterized in that A spiral accommodating groove is provided on the peripheral side surface of the winding portion.

4. The winding device according to claim 1, characterized in that The interior of the winding mechanism is provided with an accommodation space for accommodating the motor, and the bottom of the winding portion is provided with a wire passing hole.

5. The winding device according to claim 4, characterized in that The winding device also includes a wire pressing block arranged close to the wire passing hole.

6. The winding device according to claim 1, characterized in that The winding device also includes an isolating cylinder coaxially sleeved on the outside of the winding mechanism, and an accommodating space for accommodating the motor wire is formed between the isolating cylinder and the winding mechanism.

7. The winding device according to any one of claims 1 to 6, characterized in that: The winding device also includes a plurality of counterweight blocks arranged at intervals on the motor wire.

8. A silicon core furnace, characterized in that: It includes a bracket, a motor and the winding device as described in claim 7, wherein the winding mechanism is arranged on the bracket, and the bracket can be raised and lowered in the silicon core furnace, and the motor is arranged inside the winding mechanism. In the vertical direction, when the bracket rises, the motor wire is wound around the winding part with the help of the gravity of the counterweight block and the peripheral side surface of the guide part.

9. The silicon core furnace according to claim 8, characterized in that: The silicon core furnace further includes a plurality of first partitions spaced apart in a vertical direction, wherein the first partitions are arranged below the bracket, and avoidance holes are provided on the first partitions for allowing the connecting rope to pass through.

10. The silicon core furnace according to claim 8, characterized in that: The motor is a vacuum motor.

Images