Guide cylinder and water cooling screen connecting device for single crystal furnace

Abstract

The utility model discloses a guide cylinder and water-cooling screen connecting device for a single crystal furnace. The guide cylinder and water-cooling screen connecting device comprises a group of screws and movable nuts, the screw rod penetrates through the outer guide cylinder from bottom to top to the upper edge part, the longitudinal section of the movable nut is T-shaped, and the movable nut is screwed at the upper end of the screw rod from top to bottom and is positioned at the upper part of the outer guide cylinder. According to the device, a straight-through screw and nut fixing mode is adopted, and the technical problems that an existing device is prone to unhooking in the using process, and follow-up secondary feeding cannot be carried out are effectively solved; the structure that the T-shaped nut is matched with the inner thread and the outer thread of the screw is adopted, the height adjusting function is achieved, and the connecting requirements of outer guide cylinders and water cooling screens of thermal fields of different sizes can be met.

Description

Technical Field

[0001] The utility model belongs to the field of single crystal silicon production, and particularly relates to a connecting device of a guide tube and a water cooling screen for a single crystal furnace. Background Art

[0002] Existing single crystal furnaces mostly use an external motor to drive a screw to rotate and elevate the water-cooling screen. The water-cooling screen is connected to the outer guide tube. When the water-cooling screen is raised, the outer guide tube is also raised, thereby reserving sufficient space for secondary charging. However, the connection device between the water-cooling screen and the outer guide tube has many design flaws: the height cannot be adjusted, which is not compatible with thermal fields of different sizes; the split structure is prone to uncoupling during use, making subsequent secondary charging impossible; the lower end of the connection device between the water-cooling screen and the outer guide tube is easily aged and slags due to long-term exposure to high temperatures. To prevent it from breaking, it can only be replaced as a whole, which is very costly. In addition, if the aged slag falls into the quartz crucible during use, it will cause contamination of the raw metal, resulting in a short lifespan of the produced crystal rods, and in severe cases, the entire crystal rod will be scrapped. Summary of the Invention

[0003] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a connecting device between a guide tube and a water-cooled screen for a single crystal furnace in response to the deficiencies of the existing technology, so as to effectively solve the technical problems existing in the existing device and avoid the occurrence of the above-mentioned abnormalities.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A device for connecting a guide tube and a water-cooling screen for a single crystal furnace includes a set of screws and a movable nut; the screws penetrate the outer guide tube from bottom to top and move along the edge; the movable nut has a T-shaped longitudinal cross-section and is screwed from top to bottom onto the upper end of the screw and located at the upper part of the outer guide tube.

[0006] Specifically, the screw is a straight-through screw with a nut at the bottom and external threads on the outside.

[0007] Specifically, the movable nut has a T-shaped longitudinal cross-section, with the upper end larger than the lower end. The nut can be screwed onto the screw rod to adjust its height via internal and external threads. The combination of the two allows for flexible adjustment of the relative position of the movable nut and the screw rod according to actual size requirements, achieving height adjustability. This allows for connection requirements for external guide tubes and water-cooled panels of varying thermal field sizes, effectively resolving the technical challenges of existing devices with limited height adjustment and poor compatibility.

[0008] Specifically, a group of countersunk holes for screws to be inserted are correspondingly provided on the upper edge of the outer guide tube. The screws are straight-through screw structures fixed in the countersunk holes on the upper edge in a vertical state with high stability.

[0009] Furthermore, a heat insulating pad is provided at the bottom of the end nut of the screw located in the countersunk hole to effectively isolate the lower part from high temperature baking.

[0010] Furthermore, a carbon-carbon nut is installed at the bottom of the countersunk hole to seal the thermal insulation pad within the countersunk hole. The carbon-carbon nut is screwed into the countersunk hole via internal and external threads. This double insulation design forms a sealed space with the outer guide tube, effectively protecting the nut at the lower end of the screw. Even if the screw slags, the metal debris is completely isolated within the entire enclosed space, preventing the risk of metal debris falling into the quartz crucible and causing metal contamination.

[0011] Furthermore, the screw is fitted with a retaining nut, which is screwed onto the bottom of the movable nut via internal and external threads. This nut is spaced apart from the upper edge of the outer guide tube below, allowing for expansion clearance. During operation, the screw's position and state remain fixed, effectively preventing it from disengaging from the movable nut during the lifting of the water-cooling panel's U-shaped bayonet. This effectively addresses the technical issue of existing devices that can easily disengage during use, preventing subsequent secondary loading.

[0012] Specifically, the group of screws are symmetrically arranged on the upper edge of the outer guide cylinder.

[0013] Specifically, the upper end of the movable nut is larger than the U-shaped bayonet of the water-cooling screen, and the lower end of the movable nut is smaller than the U-shaped bayonet of the water-cooling screen, so that the U-shaped bayonet of the water-cooling screen can be inserted into the lower end of the movable nut, and the connecting device and the outer guide tube are lifted upward together, reserving sufficient feeding space for secondary feeding.

[0014] Preferably, the screw is a molybdenum screw, which has excellent high temperature resistance. Beneficial effects

[0015] This new connection device utilizes a straight-through screw and nut fixing method, effectively resolving the technical challenges of existing devices that can easily become unhooked during use, preventing subsequent secondary feeding. A T-nut, combined with the screw's internal and external threads, achieves height adjustability, accommodating the connection requirements of external guide tubes and water-cooled screens in various thermal fields. A closed structure combined with high-temperature insulation pads protects the high-purity molybdenum screw, effectively reducing the risk of metal contamination caused by aging and slagging, extending the device's service life and reducing replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more apparent.

[0017] Figure 1 This is a working principle diagram of the connection device between the guide tube and the water-cooling screen for the single crystal furnace.

[0018] Figure 2 It is a schematic diagram of the overall structure of the connecting device.

[0019] Figure 3 It is a structural diagram of the U-shaped mount of the water cooling screen.

[0020] Wherein, each reference numeral represents:

[0021] 1-screw; 2-movable nut; 3-fastening nut; 4-thermal insulation pad; 5-carbon-carbon nut; 6-outer guide tube; 61-upper edge; 62-counterbore; 7-water cooling screen U-shaped bayonet. DETAILED DESCRIPTION

[0022] The present invention can be better understood according to the following embodiments.

[0023] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for the understanding and reading of those familiar with this technology. They are not used to limit the conditions for the implementation of the utility model and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the utility model without affecting the efficacy and purpose of the utility model. At the same time, terms such as "upper", "lower", "front", "back", and "middle" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of the utility model without substantially changing the technical content.

[0024] Combine Figure 1 and Figure 2 As shown, the utility model of the connecting device between the guide tube and the water-cooling screen for a single crystal furnace includes a set of screws 1 and a movable nut 2; the screw 1 passes through the outer guide tube 6 from bottom to top and along the edge 61, and the movable nut 2 has a T-shaped longitudinal cross-section, is screwed from top to bottom on the upper end of the screw 1, and is located on the upper part of the outer guide tube 6.

[0025] In this embodiment, the screw 1 is a straight screw with a nut at the bottom and external threads on the outside.

[0026] In this embodiment, the movable nut 2 has a T-shaped longitudinal cross-section, with the upper end larger than the lower end. It can be tightened to an adjustable height on the screw rod 1 via internal and external threads. This combination allows for flexible adjustment of the relative position of the movable nut 2 and screw rod 1 to meet actual dimensional requirements, achieving height adjustability. This allows for connection requirements for external guide tubes and water-cooled panels of varying thermal field sizes, effectively resolving the technical challenges of existing devices with limited height adjustment and poor compatibility.

[0027] In this embodiment, the upper edge 61 of the outer guide tube 6 is provided with a set of countersunk holes 62 for inserting the screw 1. The screw 1 is a straight-through screw structure fixed in the countersunk holes of the upper edge 61 in a vertical state with high stability.

[0028] In this embodiment, the screw rod 1 is located at the bottom of the end nut in the countersunk hole 62, and a heat insulation pad 4 is also provided to effectively isolate the lower part from high-temperature baking.

[0029] In some embodiments, a carbon-carbon nut 5 is provided at the bottom of the countersunk hole 62 for enclosing the thermal insulation pad 4 within the countersunk hole 62. The carbon-carbon nut 5 is screwed into the countersunk hole 62 via internal and external threads. The double thermal insulation design forms a sealed space with the outer guide tube, effectively protecting the nut at the lower end of the screw. Furthermore, even if the screw slags, the metal debris will be completely isolated within the entire sealed space, preventing the risk of metal contamination caused by metal debris falling into the quartz crucible.

[0030] In some embodiments, the screw rod 1 is also fitted with a retaining nut 3, which is screwed onto the bottom of the movable nut 2 via internal and external threads. This retaining nut 3 is spaced from the upper edge 61 of the outer guide tube 6 below, allowing for expansion. During operation, the screw rod 1 maintains its fixed position and state, effectively preventing it from disengaging from the movable nut 2 during the lifting of the water-cooling panel's U-shaped bayonet. This effectively addresses the technical issue of existing devices that can easily disengage during use, preventing subsequent secondary loading.

[0031] In this embodiment, the group of screws 1 are symmetrically arranged on the upper edge 61 of the outer guide tube 6 .

[0032] In this embodiment, combined with Figure 1 and Figure 3 As shown, the upper end of the movable nut 2 is larger than the U-shaped bayonet 7 of the water-cooling screen, and the lower end of the movable nut 2 is smaller than the U-shaped bayonet 7 of the water-cooling screen, so that the U-shaped bayonet 7 of the water-cooling screen can be inserted into the lower end of the movable nut 2, and the connecting device and the outer guide tube 6 are lifted upward together, reserving sufficient feeding space for secondary feeding.

[0033] In this embodiment, the screw 1 is a molybdenum screw with excellent high temperature resistance.

[0034] When assembling the connecting device, first insert the threaded end of the screw 1 through the countersunk hole 62 on the upper edge 61 of the outer guide tube 6, and screw the fastening nut 3 into the upper threaded end of the screw 1. After the nut is tightened, turn it back one circle to prevent the nut from being too tight and to reserve an expansion gap. Place a thermal insulation pad 4 at the lower end of the component 1, and use a carbon-carbon nut 5 to screw into the countersunk hole 62 for sealing. Finally, screw the movable nut 2 into the screw 1 with the big end facing upward. In actual use, the U-shaped bayonet 7 of the water-cooling screen is inserted from the lower edge of the big end of the movable nut 2. When the two symmetrical groups of structures lift the water-cooling screen at the same time, the outer guide tube is lifted together, reserving enough feeding space for secondary feeding.

[0035] The utility model has the following advantages:

[0036] 1. The thermal insulation pad 4, carbon-carbon nut 5, and countersunk hole 62 form a closed space to protect the nut at the lower end of the screw 1. The lower part of the carbon-carbon nut 5 is a high-temperature zone, with an actual temperature above 1000°C. The use of the carbon-carbon nut 5 can effectively isolate the lower part from high-temperature baking. At the same time, a thermal insulation pad 4 is provided at the upper end of the carbon-carbon nut 5. The double thermal insulation design and the outer guide tube 6 form a closed space to effectively protect the lower end of the screw 1 nut. In addition, the screw 1 is made of high-purity molybdenum material, which has excellent high-temperature resistance. Under the combined effect of multiple factors, it effectively delays the aging and slagging of the lower end of the screw 1 under high-temperature conditions, thereby increasing its service life and reducing replacement costs. Since the carbon-carbon nut 5 and the countersunk hole 62 of the outer guide tube 6 are threadedly connected, a closed space can be formed. Even if the screw 1 slags, the metal debris will be completely isolated in the entire closed space, avoiding the risk of metal contamination caused by metal debris falling into the quartz crucible.

[0037] 2. The movable nut 2 has a through-threaded structure inside, while the upper end of the screw rod 1 has an external threaded structure. The two are used in conjunction with each other. The relative position of the movable nut 2 and the screw rod 1 can be flexibly adjusted according to the actual size requirements, achieving height adjustment. This function can be compatible with the connection requirements of the outer guide tube and water cooling screen of different sizes of thermal fields, effectively solving the technical problems of the existing device that cannot be adjusted in height and has poor compatibility.

[0038] 3. Screw 1 is a straight-through screw structure, mated with a fastening nut 3 and secured within the countersunk hole 62 at the upper end of the outer guide tube 6. It maintains a vertical position and offers high stability. During actual use, the position and state of screw 1 remain fixed, effectively preventing it from disengaging from the movable nut 2 during the lifting of the water-cooling panel's U-shaped bayonet. This effectively resolves the technical problem of existing devices that can easily disengage during use, preventing subsequent secondary feeding.

[0039] This utility model provides a concept and method for connecting a guide tube and a water-cooling plate for a single crystal furnace. There are many methods and approaches to implement this technical solution. The above is only a preferred embodiment of the utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the utility model, and such improvements and modifications should also be considered within the scope of protection of the utility model. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. A device for connecting a guide tube and a water-cooling plate for a single crystal furnace, characterized in that: It comprises a set of screw rods (1) and movable nuts (2); the screw rods (1) penetrate the outer guide tube (6) from bottom to top and along the edge (61); the movable nut (2) has a T-shaped longitudinal cross section and is screwed from top to bottom on the upper end of the screw rods (1) and is located on the upper part of the outer guide tube (6).

2. The device for connecting the guide tube and the water-cooling shield for a single crystal furnace according to claim 1, characterized in that: The screw (1) is a straight-through screw with a nut at the bottom and an external thread on the outside.

3. The device for connecting the guide tube and the water-cooling shield for a single crystal furnace according to claim 1, characterized in that: The movable nut (2) has a T-shaped longitudinal cross-section, the upper end is larger than the lower end, and the height of the tightening can be adjusted on the screw rod (1) through the cooperation of internal and external threads.

4. The device for connecting the guide tube and the water-cooling shield for a single crystal furnace according to claim 2, characterized in that: A group of countersunk holes (62) for inserting the screw (1) are correspondingly provided on the upper edge (61) of the outer guide tube (6).

5. The device for connecting the guide tube and the water-cooling shield for a single crystal furnace according to claim 2, characterized in that: The screw (1) is located at the bottom of the end nut in the countersunk hole (62), and a heat insulation pad (4) is also provided.

6. The device for connecting the guide tube and the water-cooling shield for a single crystal furnace according to claim 5, characterized in that: The bottom of the countersunk hole (62) is provided with a carbon-carbon nut (5) for sealing the heat insulating pad (4) in the countersunk hole (62), and the carbon-carbon nut (5) is screwed into the countersunk hole (62) through the cooperation of internal and external threads.

7. The device for connecting the guide tube and the water-cooling shield for a single crystal furnace according to claim 1, characterized in that: The screw rod (1) is also sleeved with a fastening nut (3), which is screwed onto the bottom of the movable nut (2) through the cooperation of internal and external threads, and has a gap with the upper edge (61) of the lower outer guide tube (6).

8. The device for connecting the guide tube and the water-cooling shield for a single crystal furnace according to claim 1, characterized in that: The set of screw rods (1) are symmetrically arranged on the upper edge (61) of the outer guide cylinder (6).

9. The device for connecting the guide tube and the water-cooling shield for a single crystal furnace according to claim 3, characterized in that: The upper end of the movable nut (2) is larger than the water-cooling screen U-shaped bayonet (7), and the lower end of the movable nut (2) is smaller than the water-cooling screen U-shaped bayonet (7), so that the water-cooling screen U-shaped bayonet (7) can be clamped into the lower end of the movable nut (2) and the connecting device and the outer guide tube (6) can be lifted upward together.

10. The device for connecting a guide tube and a water-cooling shield for a single crystal furnace according to claim 1, characterized in that: The screw (1) is a molybdenum screw.

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