Melting device for quartz crucible with transparent layer

Abstract

The utility model provides a melting device of a quartz crucible with a transparent layer, and relates to the technical field of crucible furnaces. Comprising a founding box body, a graphite mold, an electric arc structure and a vacuumizing assembly, a fixing frame and a rotating seat are arranged in the founding box body, the graphite mold is rotationally arranged on the rotating seat, the electric arc structure is installed on the fixing frame in a lifting mode and located over an opening of the graphite mold so as to stretch into the graphite mold in a lifting mode, and the vacuumizing assembly is arranged on the rotating seat. The quartz crucible melting device is simple in structure and reasonable in design, during melting, when the graphite mold rotates to form a quartz crucible, the electric arc structure stretches into the graphite mold in a lifting mode to conduct melting, through flexible adjustment of the lifting height, high-temperature polishing and volatilization impurity removal of the quartz crucible are achieved, and the production efficiency is improved. And the forming quality of the transparent layer of the quartz crucible is effectively ensured.

Description

Technical Field

[0001] The present application relates to the technical field of crucible furnaces, and in particular to a melting device having a transparent layer quartz crucible. Background Art

[0002] The mainstream method currently used in the market is to produce translucent quartz crucibles using the arc method. Quartz crucibles produced in arc melting furnaces have a two-layer structure. The outer layer is a region with a high bubble density, known as the bubble composite layer. This bubble composite layer heats evenly and provides excellent thermal insulation. The inner layer is a 3-5mm thick transparent layer, known as the bubble depletion layer. The bubble depletion layer reduces the bubble density in the crucible-solution contact area, thereby improving the success rate of single crystal growth and the quality of the ingot.

[0003] The transparent layer has a great influence on the crystal pulling of quartz crucible. The better the transparent layer, the higher the single crystal yield. However, the quartz crucibles currently on the market are very likely to have excessive bubble content during the melting of the transparent layer, which leads to the failure of the quartz crucible and a waste of a lot of resource costs.

[0004] In view of this, the present application aims to provide a melting device with a transparent layer quartz crucible to better solve the above technical problems. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a melting device having a transparent layer quartz crucible, which can solve the technical problem that the quartz crucible easily contains excessive bubbles during the melting process of the transparent layer.

[0006] An embodiment of the present application provides a melting device with a transparent layer quartz crucible, including a melting box, a graphite mold, an arc structure and a vacuum pumping assembly. A fixed frame and a rotating seat are provided in the melting box. The graphite mold is rotatably set on the rotating seat. The arc structure is installed in a lifting manner on the fixed frame and is located directly above the opening of the graphite mold so as to be lifted and extended into the graphite mold. The vacuum pumping assembly is connected to the melting box.

[0007] Furthermore, the angle between the rotation axis of the graphite mold and a line perpendicular to the horizontal plane is 7-16°.

[0008] Furthermore, a plurality of exhaust holes are evenly arranged on the bottom end of the graphite mold.

[0009] Furthermore, a lifting drive structure is provided on the fixing frame, and the arc structure is connected to the lifting drive structure.

[0010] Furthermore, the lifting drive structure is provided with a drive motor and a mounting plate, the drive motor is mounted on the fixing frame, the mounting plate is arranged at the output end of the drive motor, and the arc structure is mounted on the mounting plate.

[0011] Furthermore, the arc structure is provided with at least three heating arcs, and the at least three heating arcs are evenly distributed in an annular shape.

[0012] Furthermore, the vacuum pumping assembly is connected to the melting box by metal sealing.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a melting device for a quartz crucible with a transparent layer, comprising a melting box, a graphite mold, an arc structure and a vacuum assembly. A fixed frame and a rotating seat are provided in the melting box, the graphite mold is rotatably arranged on the rotating seat, the arc structure is lifted and installed on the fixed frame and is located directly above the opening of the graphite mold so as to be lifted and extended into the graphite mold. The vacuum assembly is connected to the melting box. The utility model has a simple structure and a reasonable design. During melting, while the graphite mold is rotating to form the quartz crucible, the arc structure is lifted and extended into the graphite mold for melting. The high-temperature polishing and volatilization removal of impurities of the quartz crucible are achieved through flexible adjustment of the lifting height, thereby effectively ensuring the molding quality of the transparent layer of the quartz crucible. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the structure of some embodiments of the present utility model;

[0017] Figure 2 It is a connection diagram of the lifting drive structure and the arc structure in some embodiments of the present utility model.

[0018] The reference numerals are:

[0019] Melting box 1, fixing frame 11, rotating seat 12, driving motor 13, mounting plate 14, graphite mold 2, exhaust hole 21, arc structure 3, heating arc 31, vacuum assembly 4. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0026] See also Figure 1-Figure 2As shown, the melting device with a transparent layer quartz crucible described in this embodiment includes a melting box 1, a graphite mold 2, an arc structure 3 and a vacuum assembly 4. A fixed frame 11 and a rotating seat 12 are provided in the melting box 1. The graphite mold 2 is rotatably set on the rotating seat 12. The arc structure 3 is installed in a lifting manner on the fixed frame 11 and is located directly above the opening of the graphite mold 2 so as to be lifted and extended into the graphite mold 2. The vacuum assembly 4 is connected to the melting box 1.

[0027] This embodiment has a simple structure and a reasonable design. During melting, while the graphite mold 2 is rotating to form the quartz crucible, the arc structure 3 is lifted and extended into the graphite mold 2 to perform melting. The lifting height is flexibly adjusted to achieve high-temperature polishing of the quartz crucible and volatilization to remove impurities, effectively ensuring the molding quality of the transparent layer of the quartz crucible.

[0028] In some embodiments, the angle between the rotation axis of the graphite mold 2 and a line perpendicular to the horizontal plane is 7-16°.

[0029] In this embodiment, by setting the angle between the rotation axis of the graphite mold 2 and the line perpendicular to the horizontal plane to 7-16 degrees, the centrifugal force state of the quartz sand can be changed when the graphite mold 2 rotates. When the graphite mold 2 rotates to the lowest point, the centrifugal force is downward. When the graphite mold 2 rotates to the highest point, gravity and centrifugal force offset each other, thereby reducing the movement of the quartz sand, thereby avoiding the problem of uneven thickness, and thus ensuring the quality of the transparent layer of the molded quartz crucible.

[0030] In some embodiments, a plurality of exhaust holes 21 are evenly arranged at the bottom end of the graphite mold 2 .

[0031] In this embodiment, by evenly disposing a plurality of exhaust holes 21 at the bottom of the graphite mold 2, the force on the bottom of the mold is evenly distributed during vacuuming, thereby reducing the movement of quartz sand and ultimately achieving the purpose of improving the uniformity of the insulation layer and the transparent layer.

[0032] In some embodiments, a lifting drive structure is provided on the fixing frame 11 , and the arc structure 3 is connected to the lifting drive structure.

[0033] Specifically, the lifting drive structure is provided with a drive motor 13 and a mounting plate 14 . The drive motor 13 is mounted on the fixing frame 11 . The mounting plate 14 is provided at the output end of the drive motor 13 . The arc structure 3 is mounted on the mounting plate 14 .

[0034] In this embodiment, the arc structure 3 is specifically shown to be driven to move up and down by a driving motor 13, and a servo motor can be used to achieve flexible height adjustment, better control the melting process, and ensure the molding quality.

[0035] In some embodiments, the arc structure 3 is provided with at least three heating arcs 31 , and the at least three heating arcs 31 are evenly distributed in a ring shape.

[0036] In this embodiment, at least three heating arcs 31 are provided and evenly distributed in a ring shape to meet the melting power requirements during the melting process. In addition, the heating arc 31 in this embodiment can be connected to a current or voltage regulating structure to achieve flexible power regulation and better ensure the melting quality.

[0037] In some embodiments, the vacuum assembly 4 is connected to the melting box 1 by metal sealing.

[0038] In this embodiment, the metal sealing method can effectively ensure the sealing of the connection between the vacuum component 4 and the melting box 1, and ensure the vacuum effect during the melting process. Specifically, the vacuum component 4 can be composed of a vacuum pipeline and a variable frequency vacuum pump to achieve flexible vacuum control.

[0039] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A melting device with a transparent layer quartz crucible, characterized in that: It includes a melting box, a graphite mold, an arc structure and a vacuum assembly. The melting box is provided with a fixed frame and a rotating seat. The graphite mold is rotatably set on the rotating seat. The arc structure is installed on the fixed frame in a lifting manner and is located directly above the opening of the graphite mold so as to be lifted and extended into the graphite mold. The vacuum assembly is connected to the melting box.

2. The melting device with a transparent layer quartz crucible according to claim 1, characterized in that: The angle between the rotation axis of the graphite mold and a line perpendicular to the horizontal plane is 7-16 degrees.

3. The melting device with a transparent layer quartz crucible according to claim 1, characterized in that: A plurality of exhaust holes are evenly arranged at the bottom end of the graphite mold.

4. The melting device with a transparent layer quartz crucible according to claim 1, characterized in that: The fixing frame is provided with a lifting drive structure, and the arc structure is connected to the lifting drive structure.

5. The melting device with a transparent layer quartz crucible according to claim 4, characterized in that: The lifting drive structure is provided with a drive motor and a mounting plate. The drive motor is mounted on the fixing frame. The mounting plate is arranged at the output end of the drive motor. The arc structure is mounted on the mounting plate.

6. The melting device with a transparent layer quartz crucible according to claim 1, characterized in that: The arc structure is provided with at least three heating arcs, and the at least three heating arcs are evenly distributed in an annular shape.

7. The melting device with a transparent layer quartz crucible according to claim 1, characterized in that: The vacuum pumping assembly is connected to the melting box body by metal sealing.

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