Czochralski furnace capable of secondary feeding

Abstract

The utility model discloses a Czochralski furnace capable of secondary charging, which comprises a furnace body, the top of the furnace body is fixedly connected with a transition turning plate box, the bottom of the furnace body is fixedly connected with a base, a crucible driving device is arranged in the base, the top of the transition turning plate box is provided with an upper driving device, and the bottom in the furnace body is provided with a crucible shaft. The bottom end of the crucible shaft is connected with a crucible driving device, a seed crystal shaft is arranged at the top in the furnace body, and the top end of the seed crystal shaft penetrates through the transition turning plate box and extends into the transition turning plate box. According to the Czochralski furnace capable of achieving secondary feeding, in the machining process of the Czochralski furnace, secondary feeding can be conducted inside without closing the furnace body, the overall machining process is not affected, meanwhile, the internal temperature is not affected, the machining quality is effectively guaranteed, the labor intensity of operators is relieved through an automatic feeding mode, and the production efficiency is improved. And meanwhile, operators are prevented from being scalded.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical pulling furnaces, in particular to a vertical pulling furnace capable of secondary feeding. Background Art

[0002] With the development of the world's photovoltaic industry, the quality requirements for silicon single crystals are getting higher and higher, and the diameter is getting larger and larger. Silicon single crystals have become the material basis for general high-quality photovoltaic cells and play an irreplaceable role. As far as silicon crystal growth and preparation are concerned, there are natural silicon crystals and artificial silicon crystals. The number of natural silicon crystals is very small, and generally silicon single crystals are artificially made. In order to prepare silicon single crystals with good performance, in production practice, through continuous research, practice and exploration, the silicon single crystal growth technology has been continuously improved. The methods used to grow single crystals from the melt include zone melting method, pedestal method, sheet single crystal growth method, webbed single crystal growth method, etc.

[0003] In the process of processing, many existing straightening furnaces add raw materials all at once. When the subsequent raw materials are insufficient and need to be added, the whole machine needs to be shut down before adding, and it needs to be restarted to continue running. It takes a lot of time as a whole, and the restart of the machine will affect the overall process and have a certain impact on the internal temperature changes. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a vertical pulling furnace capable of secondary charging, which solves the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a vertical pulling furnace capable of secondary charging, comprising a furnace body, a transition flap box is fixedly connected to the top of the furnace body, and a base is fixedly connected to the bottom of the furnace body, a crucible driving device is arranged inside the base, and an upper driving device is arranged on the top of the transition flap box.

[0006] Preferably, a crucible shaft is provided at the bottom of the furnace body, and the bottom end of the crucible shaft is connected to the crucible driving device.

[0007] Preferably, a seed crystal shaft is arranged at the top of the interior of the furnace body, and the top end of the seed crystal shaft passes through the transition flap box and extends to the interior of the transition flap box.

[0008] Preferably, a flap flange is provided at the bottom of the interior of the transition flap box, and a vacuum pipe interface is provided on one side of the transition flap box.

[0009] Preferably, a front door of the transitional flap box is hingedly connected to the surface of the transitional flap box via a hinge, and a front viewing window is arranged on the surface of the front door of the flap box.

[0010] Preferably, a furnace door is hingedly connected to the surface of the furnace body via a hinge.

[0011] Beneficial Effects

[0012] The utility model provides a vertical pulling furnace capable of secondary charging. Compared with the prior art, the utility model has the following beneficial effects: the vertical pulling furnace capable of secondary charging is fixedly connected with a transition flap box through the top of the furnace body, and the bottom of the furnace body is fixedly connected with a base, a crucible driving device is arranged inside the base, and an upper driving device is arranged on the top of the transition flap box. During the processing of the vertical pulling furnace, secondary charging can be performed inside without closing the furnace body, which will not affect the overall processing process, and the internal temperature will not be affected, and the processing quality is effectively guaranteed. The automated charging method reduces the labor intensity of the operator and also prevents the operator from being scalded. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of the structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the structure of the utility model.

[0015] In the figure: 1-furnace body, 2-transition flap box, 3-base, 4-crucible driving device, 5-upper driving device, 6-crucible axis, 7-seed crystal axis, 8-flange, 9-vacuum pipe interface, 10-front door of flap box, 11-front viewing window, 12-furnace door. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-2The utility model provides a technical solution: a vertical pulling furnace capable of secondary feeding, comprising a furnace body 1, a crucible shaft 6 is arranged at the bottom of the furnace body 1, and the bottom end of the crucible shaft 6 is connected to a crucible driving device 4, a seed crystal shaft 7 is arranged at the top of the furnace body 1, and the top end of the seed crystal shaft 7 passes through a transition flap box 2 and extends to the inside of the transition flap box 2, a furnace door 12 is hingedly connected to the surface of the furnace body 1 through a hinge, a transition flap box 2 is fixedly connected to the top of the furnace body 1, a flap flange 8 is arranged at the bottom of the transition flap box 2, and a vacuum pipeline interface 9 is opened on one side of the transition flap box 2, a flap box front door 10 is hingedly connected to the surface of the transition flap box 2 through a hinge, and a front window 11 is arranged on the surface of the flap box front door 10, and a base 3 is fixedly connected to the bottom of the furnace body 1, a crucible driving device 4 is arranged inside the base 3, and an upper driving device 5 is arranged on the top of the transition flap box 2. At the same time, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0018] During use, when preparing for the first crystal pulling, the flap flange 8 remains normally open. After the first crystal pulling is completed, the crystal rod is lifted into the transition flap box 2, the flap flange 8 is closed, the front door 10 of the flap box is opened, the crystal rod is taken out, and replaced with a material box containing raw materials, the front door is closed, and the vacuum pump is turned on to evacuate the interior of the transition flap box 2 to the required vacuum, the flap flange 8 is opened, and the material box is moved above the crucible. The raw materials are added into the crucible by tilting to prepare for chemical reaction, and then the material box is lifted to the position of the transition flap box 2, the flap flange 8 is closed, and the material box is taken out. This process is carried out simultaneously with chemical reaction, and all operations of the first crystal pulling are repeated.

[0019] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical pulling furnace capable of secondary charging, comprising a furnace body (1), characterized in that: The top of the furnace body (1) is fixedly connected to a transition flap box (2), and the bottom of the furnace body (1) is fixedly connected to a base (3), a crucible driving device (4) is arranged inside the base (3), and an upper driving device (5) is arranged on the top of the transition flap box (2), a flap flange (8) is arranged at the bottom of the interior of the transition flap box (2), and a vacuum pipe interface (9) is opened on one side of the transition flap box (2), a flap box front door (10) is hinged on the surface of the transition flap box (2) through a hinge, and a front viewing window (11) is arranged on the surface of the flap box front door (10).

2. A vertical pulling furnace capable of secondary charging according to claim 1, characterized in that: A crucible shaft (6) is provided at the bottom of the furnace body (1), and the bottom end of the crucible shaft (6) is connected to the crucible driving device (4).

3. A vertical pulling furnace capable of secondary charging according to claim 1, characterized in that: A seed crystal shaft (7) is arranged at the top of the interior of the furnace body (1), and the top end of the seed crystal shaft (7) penetrates the transition flap box (2) and extends to the interior of the transition flap box (2).

4. A vertical pulling furnace capable of secondary charging according to claim 1, characterized in that: A furnace door (12) is hingedly connected to the surface of the furnace body (1) via hinges.

Images