Connecting sleeve, lifting assembly and single crystal furnace
By designing an open sleeve and an annular surface contact structure for the insert at the connection between the counterweight and the tungsten wire rope, the problem of verticality deviation of the counterweight was solved, achieving stable lifting of the counterweight and integrity of the crystal rod, thus improving the safety and quality of single crystal silicon growth.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAOTOU JA SOLAR TECH CO LTD
- Filing Date
- 2025-04-21
- Publication Date
- 2026-05-12
AI Technical Summary
In the existing technology, the open sleeve at the connection between the weight and the tungsten wire rope is prone to deformation, which can lead to deviation in the verticality of the weight, and consequently cause the crystal rod to tilt or break, posing a safety hazard.
A connecting sleeve is designed, including an open sleeve and an insert. The side wall of the open sleeve has a lateral cut, and the insert is embedded in the cut to form a continuous annular surface that contacts the rope end, ensuring uniform transmission of tension and preventing deformation of the connecting sleeve.
By applying uniform force, the verticality of the hammer is controlled within the process requirements, avoiding tilting and breakage of the crystal rod, and improving the stability and safety of single crystal growth.
Smart Images
Figure CN224227285U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of monocrystalline silicon manufacturing technology, and in particular to a connecting sleeve, a pulling component, and a monocrystalline furnace. Background Technology
[0002] In the Czochralski method for growing single-crystal silicon, the counterweight is a key component of the crystal pulling system. Its core function is to provide a stable traction force for crystal growth through its own gravity. Figure 1 As shown, in the single crystal furnace, the top of the hammer 200 is lifted by the pull rope 100, so that the seed crystal 500 connected to the bottom of the hammer 200 by the graphite chuck 400 can be lifted in a uniform and steady manner in the vertical direction. This avoids defects such as dislocations and twins caused by uneven force during crystal growth, and ensures the lattice integrity of the single crystal.
[0003] The existing tungsten wire rope is connected to the counterweight 200 via an open sleeve 310. The counterweight 200 has an assembly hole 210 at its top, and the open sleeve 310 has a lateral cut on its side wall. The tungsten wire rope has a rope head 110 at its end. During assembly, the tungsten wire rope must first be moved from the lateral cut into the open sleeve 310, and then the open sleeve 310 is installed into the assembly hole 210. During the lifting operation, the tungsten wire rope contacts the lower end face of the open sleeve 310 through the rope head 110 to achieve force transmission.
[0004] The presence of the lateral cut will cause uneven stress on the lower end face of the opening sleeve 310, resulting in deformation. This will cause deviation in the verticality of the counterweight 200 and the seed crystal 500, leading to the tilting of the grown crystal rod 600. The tilted crystal rod 600 will break due to the lateral force on its thin neck 610, resulting in a falling accident. Utility Model Content
[0005] To address the issue of deviations in the verticality of the counterweight caused by the easy deformation of existing open sleeves, this invention provides a connecting sleeve, a lifting assembly, and a single crystal furnace.
[0006] According to an embodiment of the present invention, a first aspect provides a connecting sleeve, comprising:
[0007] An open sleeve has a lateral cut that extends through the inner and outer peripheral walls on its sidewalls, the lateral cut extending from the upper end to the lower end of the open sleeve.
[0008] An insert is fixedly embedded in the lateral cut, and the lower end face of the insert and the lower end face of the opening sleeve are joined to form a continuous annular surface.
[0009] In some embodiments, the distance between the two side walls of the lateral cut gradually decreases from the inside to the outside, the distance between the two side walls of the insert gradually decreases from the inside to the outside, and the insert is adapted to the lateral cut.
[0010] In some embodiments, the distance between the two side walls of the lateral cut gradually increases from top to bottom, the distance between the two side walls of the insert gradually increases from top to bottom, and the insert is adapted to the lateral cut.
[0011] In some embodiments, the annular surface includes an annular concave surface, a first concave surface is formed by the inner portion of the lower end face of the opening sleeve, and a second concave surface is formed by the inner portion of the lower end face of the insert, wherein the annular concave surface is composed of the first concave surface and the second concave surface joined together.
[0012] In some embodiments, the connecting sleeve has an inverted T-shaped structure, and the connecting sleeve includes the opening sleeve and the insert;
[0013] The open sleeve includes an upper sleeve body and a lower flange, with lateral cuts penetrating the inner and outer peripheral walls on its sidewalls; the lateral cuts form a first cut on the sleeve body and a second cut on the flange.
[0014] The insert includes a first insert portion and a second insert portion. The first insert portion is embedded in the first cut, so that the first insert portion and the sleeve portion are spliced together to form a closed ring structure. The second insert portion is embedded in the second cut, so that the second insert portion and the flange portion are spliced together to form a closed ring structure.
[0015] According to an embodiment of the present invention, a second aspect provides a lifting assembly, including a counterweight, a pull rope, and the aforementioned connecting sleeve.
[0016] The upper end face of the counterweight is provided with an axial mounting hole, and the connecting sleeve is fixedly installed in the mounting hole; the pull rope is passed through the connecting sleeve, and the end of the pull rope is provided with a rope head, which abuts against the annular surface formed by splicing the open sleeve and the insert.
[0017] In some embodiments, the mounting hole is a stepped hole, which includes a small hole portion and a large hole portion coaxially connected from top to bottom, and the connection between the small hole portion and the large hole portion forms an annular stepped surface;
[0018] The connecting sleeve has an inverted T-shaped structure, and the opening sleeve includes an upper sleeve body and a lower flange; the lateral cut forms a first cut on the sleeve body and a second cut on the flange;
[0019] The insert includes a first insert portion and a second insert portion, wherein the first insert portion is embedded in the first cut and the second insert portion is embedded in the second cut;
[0020] The ring structure formed by splicing the body and the first embedded part is fixedly inserted into the small hole, and the ring structure formed by splicing the flange and the second embedded part is inserted into the large hole. The upper end face of the ring structure formed by the flange and the second embedded part abuts against the stepped surface.
[0021] In some embodiments, the rope end is spherical, the lower end face of the open sleeve is recessed near the inner side to form a first concave surface, the lower end face of the insert is recessed near the inner side to form a second concave surface, the first concave surface and the second concave surface are joined together to form an annular concave surface, and the annular concave surface is adapted to the surface of the rope end.
[0022] In some embodiments, the maximum diameter of the annular concave surface is equal to the diameter of the rope end.
[0023] According to an embodiment of the present invention, a third aspect provides a single crystal furnace, including a furnace body, wherein the aforementioned pulling assembly is disposed within the furnace body.
[0024] By employing the technical solution of this utility model, the opening sleeve and the insert in the connecting sleeve are adapted to each other. During the lifting operation, the tension borne by the pull rope is sequentially transmitted to the rope end, the annular surface of the connecting sleeve, and the contact surface between the connecting sleeve and the counterweight, enabling the pull rope to lift the counterweight. Because the lower end surfaces of the opening sleeve and the insert form a continuous annular surface that contacts the rope end, the connecting sleeve is subjected to uniform force and is not easily deformed, ensuring that the verticality of the counterweight is controlled within the process requirements. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of part of the internal structure of an existing single crystal furnace;
[0026] Figure 2 This is a schematic diagram of the lifting assembly in this embodiment;
[0027] Figure 3 This is a schematic diagram of the connecting sleeve.
[0028] Figure 4 This is a schematic diagram of the structure of the open sleeve;
[0029] Figure 5 This is a schematic diagram of the embedded component.
[0030] Figure 6 A structural schematic diagram showing the stress on the open sleeve and insert in the horizontal direction;
[0031] Figure 7This is a structural diagram showing the forces acting on the open sleeve and insert in the vertical direction.
[0032] In the figure: pull rope 100; rope end 110; counterweight 200; assembly hole 210; connecting sleeve 300; annular surface 301; annular concave surface 302; open sleeve 310; sleeve body 311; flange 312; first concave surface 313; insert 320; first insert part 321; second insert part 322; second concave surface 323; lateral cut 330; first cut 331; second cut 332; graphite chuck 400; seed crystal 500; crystal rod 600; narrow neck 610. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 utility model and are not intended to limit the present utility model.
[0034] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0035] like Figure 2 As shown, this embodiment provides a single crystal furnace, which includes a furnace body and a lifting assembly disposed within the furnace body. The lifting assembly specifically includes a counterweight 200, a connecting sleeve 300, and a pulling rope 100.
[0036] See details Figure 2 In this embodiment, the upper end face of the counterweight 200 is provided with an axial mounting hole 210. The material of the counterweight 200 is preferably molybdenum, which gives the counterweight 200 characteristics such as high melting point, low coefficient of thermal expansion and corrosion resistance. Especially in the high-temperature environment of the single crystal furnace, the molybdenum-based counterweight 200 can maintain structural stability and ensure that the verticality of the counterweight 200 is controlled within the process requirements.
[0037] See details Figure 3-5The connecting sleeve 300 in this embodiment includes an open sleeve 310 and an insert 320. The open sleeve 310 is fixedly disposed in the assembly hole 210. The side wall of the open sleeve 310 has a lateral cut 330 that penetrates the inner and outer peripheral walls. The lateral cut 330 extends from the upper end to the lower end of the open sleeve 310. The insert 320 is fixedly embedded in the lateral cut 330, such that the lower end face of the insert 320 and the lower end face of the open sleeve 310 are joined to form a continuous annular surface 301.
[0038] See details Figure 2 In this embodiment, the pull rope 100 is preferably made of tungsten wire rope, which gives it characteristics such as extremely high melting point, high tensile strength, and creep resistance. Especially in the high-temperature environment of a single crystal furnace, the tungsten wire rope is not prone to softening or breaking, ensuring stability during long-term lifting. The end of the pull rope 100 is provided with a rope head 110, the diameter of which is larger than the inner diameter of the open sleeve 310, so that the rope head 110 can abut against the annular surface 301 formed by the splicing of the open sleeve 310 and the insert 320.
[0039] During the lifting operation, the tension borne by the pull rope 100 is sequentially transmitted to the surface of the rope end 110, the annular surface 301 of the connecting sleeve 300, and the contact surface between the connecting sleeve 300 and the counterweight 200, enabling the pull rope 100 to lift the counterweight 200. Because the annular surface 301 of the connecting sleeve 300 is in contact with the rope end 110, the connecting sleeve 300 is subjected to uniform force and is not easily deformed, ensuring that the verticality of the counterweight 200 is controlled within the process requirements.
[0040] See details Figure 3-5 In this embodiment, the annular surface 301 also includes an annular concave surface 302. The lower end face of the open sleeve 310 near the inner side is recessed to form a first concave surface 313, and the lower end face of the insert 320 near the inner side is recessed to form a second concave surface 323. The annular concave surface 302 is composed of the first concave surface 313 and the second concave surface 323. The annular concave surface 302 is adapted to the rope end 110, so that the rope end 110 and the connecting sleeve 300 have a large contact area, which helps the rope end 110 to stably transmit the force to the connecting sleeve 300.
[0041] In this embodiment, the rope end 110 is preferably spherical. The annular concave surface 302 can fit into the spherical rope end 110, so that the connecting sleeve 300 is subjected to uniform force. When the maximum diameter of the annular concave surface 302 is equal to the diameter of the rope end 110, the open sleeve 310 and the insert 320 can cover half of the surface area of the rope end 110, that is, the annular concave surface 302 can fit into half of the spherical surface of the rope end 110, and the contact area between the rope end 110 and the connecting sleeve 300 is maximized. It should be noted that in some embodiments, the rope end 110 can also be designed as conical or other existing shapes as needed.
[0042] In this embodiment, the distance between the two side walls of the lateral cut 330 of the open sleeve 310 gradually decreases from the inner to the outer side, resulting in a wedge-shaped structure with a wider inner side and a narrower outer side in the horizontal cross-section of the lateral cut 330. Since the insert 320 is adapted to the lateral cut 330, i.e., the distance between the two side walls of the insert 320 gradually decreases from the inner to the outer side, the horizontal cross-section of the insert 320 also has a wedge shape with a wider inner side and a narrower outer side. See details... Figure 6 When the insert 320 exerts a lateral force F2 on the opening sleeve 310, the opening sleeve 310 generates a reaction force F1 on the insert 320 because both the lateral opening and the insert 320 are wedge-shaped with a wider inner side and a narrower outer side. This reaction force F1 cancels out F2, preventing the insert 320 from shifting laterally relative to the opening sleeve 310. When the insert 320 exerts an outward force F3 on the opening sleeve 310, the opening sleeve 310 generates a reaction force F4 on the insert 320. This reaction force F4 cancels out F3, preventing the insert 320 from shifting outward relative to the opening sleeve 310.
[0043] It should be noted that in some embodiments, the distance between the two side walls of the lateral cutout 330 gradually increases from the inside to the outside, and the horizontal cross-section of the lateral opening has a wedge-shaped structure that is narrow on the inside and wide on the outside. Since the rope head 110 exerts an outward force on the insert 320, while the opening sleeve 310 cannot exert an inward force on the insert 320 to restrain it, the insert 320 will displace outward and detach from the lateral opening. Therefore, this structure is not adopted in this embodiment.
[0044] In this embodiment, the distance between the two side walls of the lateral cutout 330 gradually increases from top to bottom, resulting in a wedge-shaped structure with a narrow upper end and a wide lower end in the vertical cross-section of the lateral opening. Since the insert 320 is adapted to the lateral cutout 330, i.e., the distance between the two side walls of the insert 320 gradually increases from top to bottom, the vertical cross-section of the insert 320 also has a wedge shape with a narrow upper end and a wide lower end. See details... Figure 7 When the insert 320 exerts an upward force F5 on the open sleeve 310, because both the lateral opening and the insert 320 are wedge-shaped with a narrow upper end and a wide lower end, the open sleeve 310 exerts a reaction force F6 on the insert 320. This reaction force F6 cancels out F5, and the insert 320 will not shift upward relative to the open sleeve 310, thus ensuring the consistency of the force on the connecting sleeve 300 and improving the deformation problem of the connection structure between the pull rope 100 and the counterweight 200.
[0045] See details Figure 2 In this embodiment, the assembly hole 210 is preferably a stepped hole. The assembly hole 210 includes a small hole portion and a large hole portion that are coaxially connected from top to bottom, wherein the connection between the small hole portion and the large hole portion forms an annular stepped surface.
[0046] See details Figure 3-5In this embodiment, the connecting sleeve 300 is specifically an inverted T-shaped structure, wherein the open sleeve 310 includes an upper sleeve body portion 311 and a lower flange portion 312; the lateral cut 330 of the open sleeve 310 penetrates the inner and outer peripheral walls of the sleeve body portion 311 and the flange portion 312, forming a first cut 331 on the sleeve body portion 311 and a second cut 332 on the flange portion 312, so that the pull rope 100 can pass through the lateral cut 330 from the outside of the open sleeve 310 and be inserted into the open sleeve 310. The insert 320 in this embodiment preferably includes a first insert portion 321 and a second insert portion 322. The first insert portion 321 is embedded in the first cut 331, so that the first insert portion 321 and the sleeve portion 311 are spliced to form a closed ring structure. The second insert portion 322 is embedded in the second cut 332, so that the second insert portion 322 and the flange portion 312 are spliced to form a closed ring structure. This not only enhances the structural strength of the connecting sleeve 300, but also limits the pull rope 100 passing through the connecting sleeve 300, further ensuring that the verticality of the counterweight 200 is controlled within the process requirements.
[0047] The annular structure formed by splicing the sleeve body 311 and the first embedding part 321 is fixedly inserted into the small hole. The outer peripheral wall formed by the sleeve body 311 and the first embedding part 321 abuts against the inner peripheral wall of the small hole to restrict the entire connecting sleeve 300 from moving radially relative to the counterweight 200. The annular structure formed by splicing the flange part 312 and the second embedding part 322 is inserted into the large hole. The upper end face of the annular structure formed by the flange part 312 and the second embedding part 322 abuts against the step surface, which can restrict the entire connecting sleeve 300 from moving axially upward relative to the counterweight 200.
[0048] It should be noted that in some embodiments, the insert 320 can partially fill the gap formed by the lateral cut 330 as needed. For example, the insert 320 may be selected to include only the second insert portion 322 embedded in the second cut 332. Since the sleeve body portion 311 forms a gap at the first cut 331, this gap not only cannot guarantee the structural strength of the connecting sleeve 300, but also cannot limit the pull rope 100, which can easily lead to a deviation in the perpendicularity of the pull rope 100 and the counterweight 200. Therefore, this embodiment does not adopt this approach.
[0049] 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.
[0050] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A connecting sleeve, characterized in that, include: An open sleeve (310) has a lateral cut (330) on its side wall that penetrates the inner and outer peripheral walls. The lateral cut (330) extends from the upper end to the lower end of the open sleeve (310). An insert (320) is fixedly embedded in the lateral cut (330), and the lower end face of the insert (320) and the lower end face of the opening sleeve (310) are joined to form a continuous annular surface (301).
2. The connecting sleeve according to claim 1, characterized in that: The distance between the two side walls of the lateral cut (330) gradually decreases from the inside to the outside, and the distance between the two side walls of the insert (320) gradually decreases from the inside to the outside. The insert (320) is adapted to the lateral cut (330).
3. The connecting sleeve according to claim 1, characterized in that: The distance between the two side walls of the lateral cut (330) gradually increases from top to bottom, and the distance between the two side walls of the insert (320) gradually increases from top to bottom. The insert (320) is adapted to the lateral cut (330).
4. The connecting sleeve according to any one of claims 1-3, characterized in that: The annular surface (301) includes an annular concave surface (302). The lower end face of the opening sleeve (310) near the inner side is recessed to form a first concave surface (313). The lower end face of the insert (320) near the inner side is recessed to form a second concave surface (323). The annular concave surface (302) is composed of the first concave surface (313) and the second concave surface (323).
5. The connecting sleeve according to any one of claims 1-3, characterized in that: The connecting sleeve (300) has an inverted T-shaped structure, and the opening sleeve (310) includes an upper sleeve body (311) and a lower flange (312); the lateral cut (330) forms a first cut (331) on the sleeve body (311) and a second cut (332) on the flange (312); The insert (320) includes a first insert (321) and a second insert (322). The first insert (321) is embedded in the first cut (331) so that the first insert (321) and the sleeve part (311) are spliced together to form a closed ring structure. The second insert (322) is embedded in the second cut (332) so that the second insert (322) and the flange part (312) are spliced together to form a closed ring structure.
6. A lifting component, characterized in that: Includes a counterweight (200), a pull rope (100), and a connecting sleeve (300) as described in any one of claims 1-5; The upper end face of the counterweight (200) is provided with an axial mounting hole (210), and the connecting sleeve (300) is fixedly disposed in the mounting hole (210); the pull rope (100) is inserted into the connecting sleeve (300), and the end of the pull rope (100) is provided with a rope head (110), and the rope head (110) abuts against the annular surface (301) formed by splicing the open sleeve (310) and the insert (320).
7. The lifting assembly according to claim 6, characterized in that: The assembly hole (210) is a stepped hole. The assembly hole (210) includes a small hole and a large hole that are coaxially connected from top to bottom. The connection between the small hole and the large hole forms an annular stepped surface. The connecting sleeve (300) has an inverted T-shaped structure, and the connecting sleeve (300) includes the opening sleeve (310) and the insert (320); The open sleeve (310) includes an upper sleeve body (311) and a lower flange (312), and its side wall has a lateral cut (330) that penetrates the inner and outer peripheral walls; the lateral cut (330) forms a first cut (331) on the sleeve body (311) and a second cut (332) on the flange (312); The insert (320) includes a first insert portion (321) and a second insert portion (322), wherein the first insert portion (321) is embedded in the first cut (331) and the second insert portion (322) is embedded in the second cut (332); The ring structure formed by splicing the body part (311) and the first embedded part (321) is fixedly inserted into the small hole, and the ring structure formed by splicing the flange part (312) and the second embedded part (322) is inserted into the large hole. The upper end face of the ring structure formed by the flange part (312) and the second embedded part (322) abuts against the step surface.
8. The lifting assembly according to claim 6 or 7, characterized in that: The rope end (110) is spherical. The lower end face of the opening sleeve (310) near the inner side is recessed to form a first concave surface (313). The lower end face of the insert (320) near the inner side is recessed to form a second concave surface (323). The first concave surface (313) and the second concave surface (323) are spliced together to form an annular concave surface (302). The annular concave surface (302) is adapted to the surface of the rope end (110).
9. The lifting assembly according to claim 8, characterized in that: The maximum diameter of the annular concave surface (302) is equal to the diameter of the rope end (110).
10. A single crystal furnace, comprising a furnace body, characterized in that: The furnace body is provided with the lifting assembly as described in any one of claims 6-9.