Protective device, lifting mechanism and single crystal furnace

Abstract

The utility model provides a protection device, a lifting mechanism and a single crystal furnace, the protection device is applied to a tungsten filament rope, and the protection device comprises a hard protection sleeve, a lifting mechanism and a single crystal furnace, the hard protection sleeve at least sleeves the joint of the root of the tungsten filament rope and a heavy hammer; the soft protective sleeve at least sleeves the hard protective sleeve and is positioned on the top of the heavy hammer; the hard protective sleeve does not have stress deformability in the length direction of the tungsten filament rope, and the soft protective sleeve has stress deformability in the length direction of the tungsten filament rope and recovers the deformability after the applied force is removed. The soft protective sleeve is adopted to wrap the easy-to-fold part and the high-temperature baking part of the root part of the tungsten filament rope, so that the tungsten filament rope is protected from being damaged when being subjected to external force and high-temperature baking, the compression amount of the soft protective sleeve does not influence the rising distance of the tungsten filament rope, the length of a crystal bar is ensured, and compared with a lengthened hard protective sleeve, the soft protective sleeve has the advantages that the service life of the crystal bar is prolonged. The production efficiency and the yield can be improved, the shaking defect after hard protection is lengthened and the influence of yield reduction are overcome, the service life of the tungsten filament rope is kept, and the accident potential is reduced.

Description

Technical Field

[0001] This application relates to the field of single crystal furnace technology, and in particular to a protective device, a pulling mechanism, and a single crystal furnace. Background Technology

[0002] In the production of monocrystalline silicon, a monocrystalline furnace is used to melt silicon material, and then a monocrystalline furnace pulling mechanism is used to pull the molten silicon material to form a monocrystalline silicon rod. Specifically, the monocrystalline furnace pulling mechanism includes a tungsten wire rope, a weight connected to the end of the tungsten wire rope, and a seed crystal. The monocrystalline silicon rod is obtained by immersing the seed crystal in the molten silicon material and pulling it out.

[0003] Because the root of the tungsten wire rope is connected to the seed crystal by a counterweight and is frequently exposed to high temperatures, its aging rate is affected by the high temperature and it ages relatively quickly. Therefore, currently, a hard protective sleeve is installed at the root of the tungsten wire rope to protect the contact area between the tungsten wire rope and the counterweight. However, the root of the tungsten wire rope is close to the center of the hot zone and is directly exposed to high temperatures. When encountering external forces, the part of the tungsten wire rope above the counterweight will bend and be damaged, aging prematurely and affecting its service life. Therefore, the hard protective sleeve cannot completely and effectively protect the vulnerable parts of the tungsten wire rope. Moreover, even if the hard protective sleeve is lengthened, because the overall structure of the single crystal furnace is mutually matched, if the length of the hard protective sleeve is increased by the same amount, the length of the crystal rod must be reduced, which directly affects the single crystal output and also increases safety hazards. Utility Model Content

[0004] Based on this, in order to overcome the shortcomings of the prior art, this application provides a protective device, a lifting mechanism, and a single crystal furnace. A soft protective sleeve is used to wrap the tungsten wire rope at the root where it is prone to folding and the high-temperature baking part, so that it can be protected from damage when subjected to external force and high-temperature baking. The compression of the soft protective sleeve itself does not affect the rising distance of the tungsten wire rope, ensuring the length of the crystal rod, improving output and yield, solving the swaying drawbacks and output impact of the hard protective sleeve after lengthening, maintaining the service life of the tungsten wire rope, and reducing accident risks.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] On one hand, this application provides a protective device applied to a tungsten wire rope, comprising:

[0007] A hard protective sleeve is provided, which is at least fitted at the base of the tungsten wire rope and at the connection point of the counterweight.

[0008] A soft protective sleeve is fitted over the hard protective sleeve and is located on top of the weight.

[0009] The hard protective sleeve does not deform under stress along the length of the tungsten wire rope, while the soft protective sleeve does deform under stress along the length of the tungsten wire rope and recovers its deformability after the applied force is removed.

[0010] Furthermore, in the protective device provided in this application, the top end of the soft protective sleeve is higher than the top end of the hard protective sleeve before deforming along the length direction of the tungsten wire rope.

[0011] Furthermore, in the protective device provided in this application, the top of the soft protective sleeve does not exceed the top of the hard protective sleeve after deformation along the length of the tungsten wire rope.

[0012] Furthermore, in the protective device provided in this application, the soft protective sleeve has a resilient force in its radial direction.

[0013] Furthermore, in the protective device provided in this application, the soft protective sleeve is configured as a protective spring.

[0014] Furthermore, in the protective device provided in this application, the protective spring is made of 316L stainless steel.

[0015] Furthermore, in the protective device provided in this application, the inner diameter of the soft protective sleeve is 16-20mm and the outer diameter is 24-28mm.

[0016] Furthermore, in the protective device provided in this application, the length of the soft protective sleeve before deformation along the length direction of the tungsten wire rope is 200-220 mm.

[0017] Secondly, this application provides a lifting mechanism, including the aforementioned protective device, a tungsten wire rope, and a counterweight, with the root of the tungsten wire rope connected to the counterweight.

[0018] Thirdly, this application provides a single crystal furnace, including the aforementioned pulling mechanism.

[0019] The beneficial effects of this application are:

[0020] This application discloses a protective device applied to a tungsten wire rope, comprising a hard protective sleeve and a soft protective sleeve. The hard protective sleeve is fitted at least at the root of the tungsten wire rope and at the connection point with the counterweight, while the soft protective sleeve is fitted at least on top of the hard protective sleeve and positioned on the top of the counterweight. The hard protective sleeve is non-deformable under stress along the length of the tungsten wire rope, while the soft protective sleeve is deformable under stress along the length of the tungsten wire rope and recovers its deformability after the applied force is removed. By using the soft protective sleeve to wrap around the easily folded areas at the root of the tungsten wire rope and the high-temperature baking areas, the tungsten wire rope is protected from damage under external force and high-temperature baking. The compression of the soft protective sleeve itself does not affect the rising distance of the tungsten wire rope, ensuring the length of the crystal rod. Compared to using an extended hard protective sleeve, this improves production efficiency and output, solves the swaying drawbacks and output impact of an extended hard protective sleeve, maintains the service life of the tungsten wire rope, and reduces potential safety hazards. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the tungsten wire rope with a hard protective sleeve in the embodiment after a counterweight is installed in its normal state;

[0022] Figure 2 This is a schematic diagram of the deformation and folding state of a tungsten wire rope with a hard protective sleeve after being subjected to external force and fitted with a counterweight in the embodiment.

[0023] Figure 3 This is a schematic diagram of a tungsten wire rope with a hard protective sleeve in the embodiment, after being fitted with a counterweight and a soft protective sleeve, in its normal state.

[0024] Figure 4 This is a schematic diagram of the state of a tungsten wire rope with a hard protective sleeve when subjected to external force after being fitted with a counterweight and a soft protective sleeve in the embodiment.

[0025] Figure 5A This is a schematic diagram of the state when the tungsten wire rope is lifted to its highest point after being equipped with a counterweight and a soft protective sleeve of the same length, as shown in the embodiment.

[0026] Figure 5B This is a schematic diagram of the state when the tungsten wire rope is lifted to its highest point after being equipped with a counterweight and a hard protective sleeve of the same length, as shown in the embodiment.

[0027] Figure 6 This is a schematic diagram illustrating the state during the crystal rod production process in this embodiment, where the light emitted from the liquid surface shines onto the furnace cover and reflects onto the tungsten wire rope, and the tungsten wire rope is directly baked by high temperature.

[0028] Label Explanation:

[0029] Soft protective sleeve 10; tungsten wire rope 11; hard protective sleeve 12; counterweight 13; crystal rod 14; furnace cover 15; lifting head 16; extended hard protective sleeve 17; quartz crucible 18; silicon liquid 19; light and heat in the production process 20; auxiliary chamber 21. Detailed Implementation

[0030] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0032] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the scope of the present application.

[0033] On the one hand, refer to Figure 3 As shown, this application provides a protective device applied to a tungsten wire rope, comprising:

[0034] A hard protective sleeve 12 is fitted at least at the root of the tungsten wire rope 11 and the connection point of the counterweight 13.

[0035] The soft protective sleeve 10 is at least fitted over the hard protective sleeve 12 and is located on top of the counterweight 13;

[0036] Among them, the hard protective sleeve 12 does not have the property of deformation under stress along the length of the tungsten wire rope 11, while the soft protective sleeve 10 has the property of deformation under stress along the length of the tungsten wire rope 11 and can recover its deformation after the applied force is removed.

[0037] The upper end of the hard protective sleeve 12 extends at least beyond the counterweight 13, so that it can be fitted onto the tungsten wire rope 11 extending beyond the counterweight 13 to protect the portion of the tungsten wire rope 11 connected to the counterweight outside the counterweight 13.

[0038] The soft protective sleeve 10 is at least fitted over the hard protective sleeve 13 and its lower end abuts against the upper end of the counterweight 13.

[0039] Specifically, such as Figure 1 As shown, the tungsten wire rope 11 used to generate the crystal rod 14 via crystal pulling is equipped with a rigid protective sleeve 12 at its root when it leaves the factory. There is a cotter pin connecting the tungsten wire rope 11 and the counterweight 13. The tungsten wire rope 11 passes through the upper end of the counterweight 13 and is inserted into the cotter pin. Pulling the tungsten wire rope 11 and the cotter pin upwards together from inside the counterweight 13 completes the installation. The rigid protective sleeve 12 primarily protects the connection between the tungsten wire rope 11 and the counterweight 13 from damage. The rigid protective sleeve 12 cannot be lengthened further; if it is, the crystal rod 14 will sway during its ascent as the tungsten wire rope 11 shortens within the auxiliary chamber 15, posing a safety hazard. Furthermore, if the hard protective sleeve 12 is lengthened, since it cannot be compressed along the length of the tungsten wire rope 11, after the tungsten wire rope 11 drives the counterweight 13 and carries the crystal rod 12 into the secondary chamber 15, the upper end of the hard protective sleeve 12 will abut against the top of the secondary chamber 15, and the lower end will abut against the counterweight 13, thus occupying space in the secondary chamber 15 and preventing the crystal rod 14 from fully entering the secondary chamber 15. And, if... Figure 2As shown, during the production process, when using a crystal-retrieving cart to retrieve the crystal rod 14, there is a possibility that the thin neck of the crystal rod 14 is cut before it reaches the bottom of the cart, causing the tungsten wire rope 11 to bend and be damaged when it rebounds. There is also a possibility that only the bottom of the crystal rod 14 is observed to reach the bottom of the cart, while the upper part is not checked, resulting in the crystal rod 14 being lowered too far, causing the tungsten wire rope 11 to bend and be damaged, creating a potential safety hazard. This could lead to accidents later on, such as the rod falling during production, or in severe cases, silicon leakage, resulting in significant losses.

[0040] Reference Figure 6 As shown, during the production process of crystal rod 14, the surface light emitted from the silicon melt 19 in the quartz crucible 18 shines onto the furnace cover 15 and is reflected onto the tungsten wire rope 11. Additionally, the high-temperature baking below the tungsten wire rope 11 causes premature aging of the tungsten wire rope 11. Furthermore, because the various components in the overall structure of the solar-grade large-size single-crystal Czochralski furnace are mutually matched, combined with… Figure 5B As shown, if the tungsten wire rope 11 is fitted with an extended hard protective sleeve 17, the height at which the lifting head 16 lifts the tungsten wire rope 11 will be reduced, which will inevitably reduce the length of the crystal rod 14 in the auxiliary chamber 21, directly affecting the production efficiency and ultimately the output.

[0041] In this application, a soft protective sleeve 10 is provided over the tungsten wire rope 11, thereby providing soft protection for the lower part of the tungsten wire rope 11. Figure 3 and Figure 4 As shown, this design ensures that the tungsten wire rope 11 does not break when encountering external force during vertical movement. Additionally, see reference... Figure 5A As shown, the soft protective sleeve 10 can be compressed during the lifting process of the tungsten wire rope 11 with the lifting head 16. Compared with the method of lengthening the hard protective sleeve 12, it will not affect the lifting height of the tungsten wire rope 11, nor will it affect the length of the crystal rod 14.

[0042] At the same time, refer to Figure 6 As shown, because a soft protective sleeve 10 is fitted over the tungsten wire rope 11, it can isolate the light emitted from the surface of the molten silicon 19 (luminescence 20) and the light reflected from the furnace cover 15 from the tungsten wire rope 11 to a certain extent. It can also isolate the tungsten wire rope 11 from the high temperature below, thus providing a certain degree of protection for the tungsten wire rope 11.

[0043] According to some embodiments of the present application, a protective device employs a soft protective sleeve 10 with deformability under stress and the ability to recover its deformation after the applied force is removed to wrap around the easily folded parts of the tungsten wire rope 11 and the high-temperature baking parts. This protects the tungsten wire rope 11 from damage when subjected to external force and high-temperature baking. The soft protective sleeve 10 has deformability under stress, and can deform or compress along the length of the tungsten wire rope 11 under the action of external force. The amount of compression does not affect the rising distance of the tungsten wire rope 11, thus ensuring the length of the crystal rod 14. Compared with the use of an extended hard protective sleeve 17, this can improve production efficiency and output, solve the swaying drawbacks and output impact of the extended hard protective sleeve, maintain the service life of the tungsten wire rope 11, and reduce accident risks. At the same time, the soft protective sleeve 10 can recover its deformation after the applied force is removed, thus facilitating reuse.

[0044] Furthermore, in the protective device provided in this application, the inner diameter of the soft protective sleeve 10 is larger than the outer diameter of the hard protective sleeve 12. In addition, the top end of the soft protective sleeve 10 provided in this application is higher than the top end of the hard protective sleeve 12 before deforming along the length direction of the tungsten wire rope 11, so as to protect the tungsten wire rope 11 outside the hard protective sleeve 12.

[0045] Specifically, by positioning the soft protective sleeve 10 above the counterweight 13 connected to the tungsten wire rope 11, and ensuring that the inner diameter of the soft protective sleeve 10 is larger than the outer diameter of the hard protective sleeve 12, this application achieves a protective effect. By using the soft protective sleeve 10 to cover the easily folded areas at the root of the tungsten wire rope 11 and the high-temperature baking areas, the tungsten wire rope 11 is protected from damage under external force and high-temperature baking. Furthermore, the height of the soft protective sleeve 10 can be further reduced by calculating from the top of the counterweight when compressed, thereby improving the production efficiency and yield of the crystal rod 14. By setting the inner diameter of the soft protective sleeve 10 to be larger than the outer diameter of the hard protective sleeve 12, the soft protective sleeve 10 can be passed through the hard protective sleeve 12 on the tungsten wire rope 11 during assembly before proceeding to the next assembly step.

[0046] Furthermore, in the protective device provided in this application, the height of the top of the soft protective sleeve 10 after deformation along the length direction of the tungsten wire rope 11 is not higher than the top of the hard protective sleeve 12.

[0047] Specifically, it plays a protective role in preventing damage to the tungsten wire rope 11. The compression of the soft protective sleeve 10 itself does not affect the rising distance of the tungsten wire rope 11, ensuring the length of the crystal rod 14. Compared with the use of the extended hard protective sleeve 17, it can improve production efficiency and output.

[0048] Furthermore, in the protective device provided in this application, the soft protective sleeve 10 has a resilient force in its radial direction, which can shape the wrapped part of the tungsten wire rope 11.

[0049] Specifically, such as Figure 2 As shown, when the tungsten wire rope 11 only has the hard protective sleeve 12 and is subjected to external force, the point of greatest stress is above the counterweight 13, that is, above the connection between the tungsten wire rope 11 and the hard protective sleeve 12, it will be deformed by external force and become kinked. Figure 4 As shown, by covering the tungsten wire rope 11 with a soft protective sleeve 10, when the soft protective sleeve 10 has a rebound force in its radial direction, it can shape the wrapped part of the tungsten wire rope 11. The soft protective sleeve 10 uses its own elasticity to keep the tungsten wire rope 11 in an approximately vertical state, protecting the tungsten wire rope 11 from bending, thus achieving the safety protection function of the tungsten wire rope 11.

[0050] Furthermore, in the protective device provided in this application, the soft protective sleeve 10 is configured as a protective spring, which can extend and retract along the length of the tungsten wire rope under the action of external force.

[0051] Specifically, in this application, the soft protective sleeve 10 is configured as a protective spring, or a spring. By providing a spring over the tungsten wire rope 11, the spring can be fitted outside the hard protective sleeve 12, thus positioned above the counterweight 13 connected to the tungsten wire rope 11. Since the spring provides soft protection, combined with... Figure 3 and Figure 4 As shown, this design ensures that the tungsten wire rope 11 does not break when encountering external force during vertical movement. Additionally, see reference... Figure 5A As shown, the spring can be compressed during the lifting process of the tungsten wire rope 11 with the lifting head 16, without affecting the lifting height of the tungsten wire rope 11 or the length of the crystal rod 14.

[0052] Furthermore, in the protective device provided in this application, the protective spring is made of 316L stainless steel.

[0053] Furthermore, in the protective device provided in this application, the inner diameter of the soft protective sleeve 10 is 16-20mm and the outer diameter is 24-28mm.

[0054] Specifically, the diameter of the soft protective sleeve 10 in this application is 16-20mm, which means it can be fitted over the hard protective sleeve 12 and can protect the tungsten wire rope 11 from deformation.

[0055] Furthermore, in the protective device provided in this application, the length of the soft protective sleeve 10 before deformation along the length direction of the tungsten wire rope 11 is 200-220 mm.

[0056] Specifically, the soft protective sleeve 10 in this application has a length of 200-220mm in its natural state, which means that it can be placed outside the hard protective sleeve 12 and is higher than the height of the hard protective sleeve 12, and can protect the easily deformable parts of the tungsten wire rope 11.

[0057] Secondly, this application provides a lifting mechanism, including the aforementioned protective device, a tungsten wire rope 11, and a counterweight 13, wherein the root of the tungsten wire rope 11 is connected to the counterweight 13.

[0058] Thirdly, this application provides a single crystal furnace, including the aforementioned pulling mechanism.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A protective device, characterized in that, The protective device is applied to tungsten wire rope and includes: A rigid protective sleeve is provided, at least at the root of the tungsten wire rope and the connection point of the counterweight. A soft protective sleeve, which is at least fitted over the hard protective sleeve and located on top of the weight; The hard protective sleeve is not deformable under stress along the length of the tungsten wire rope, while the soft protective sleeve is deformable under stress along the length of the tungsten wire rope and recovers its deformability after the applied force is removed.

2. The protective device according to claim 1, characterized in that, The top of the soft protective sleeve is higher than the top of the hard protective sleeve before it deforms along the length of the tungsten wire rope.

3. The protective device according to claim 2, characterized in that, The top of the soft protective sleeve does not exceed the top of the hard protective sleeve after deformation along the length of the tungsten wire rope.

4. The protective device according to claim 1, characterized in that, The soft protective sleeve has a resilient force in its radial direction.

5. The protective device according to claim 4, characterized in that, The soft protective sleeve is configured as a protective spring.

6. The protective device according to claim 5, characterized in that, The protective spring is made of 316L stainless steel.

7. The protective device according to claim 1, characterized in that, The inner diameter of the soft protective sleeve is 16-20mm, and the outer diameter is 24-28mm.

8. The protective device according to claim 1, characterized in that, The length of the soft protective sleeve before deformation along the length direction of the tungsten wire rope is 200-220 mm.

9. A lifting mechanism, characterized in that, It includes the protective device, tungsten wire rope, and counterweight as described in any one of claims 1-8, wherein the root of the tungsten wire rope is connected to the counterweight.

10. A single crystal furnace, characterized in that, Includes the lifting mechanism as described in claim 9.

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