Spring piece fixing structure in guide plate of polycrystalline silicon reduction furnace

Abstract

The utility model relates to the technical field of polycrystalline silicon production, in particular to a spring piece fixing structure in a guide plate of a polycrystalline silicon reduction furnace. The fixing structure comprises an inner barrel and a jacket barrel sleeving the inner barrel, a cooling space is formed between the inner barrel and the jacket barrel, a guide plate is arranged at the cooling space, a gap is formed between the guide plate and the jacket barrel, a spring piece is arranged on one side of the guide plate in the free end direction, and at least one part of the spring piece abuts against and is matched with the jacket barrel. At least one pressing strip is arranged on the side, away from the guide plate, of the spring piece, the side, away from the jacket barrel body, of the pressing strip is in welding fit with the guide plate, and the pressing strip is used for keeping the state that the spring piece abuts against the jacket barrel body and the guide plate. The pressing strip is arranged to press the spring piece, so that fluid short circuit caused by deformation of the spring piece is prevented, the pressing strip and the flow guide plate are fixed through spot welding, the installation cost of the pressing strip is reduced, and the risk of leakage of cooling fluid can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon production, and specifically to a fixing structure of a spring piece in a flow guide plate of a polysilicon reduction furnace. Background Art

[0002] Silicon materials play a very important role in both photovoltaic power generation and chip research and development. As the core equipment for producing polysilicon, the quality of the structure of the reduction furnace seriously affects the quality and output of the final product. The furnace barrel of the reduction furnace has a two-layer structure of an inner barrel and a jacket barrel. A cooling space is formed between these two layers of structures. Cooling water enters this space and is guided from bottom to top by the flow guide plate to complete the cooling of the inner barrel wall, ensuring the reliability and safety of the reduction furnace. For the convenience of actual production and installation, there is a gap between the flow guide plate and the jacket barrel. These gaps will cause fluid short-circuiting, thereby affecting the cooling effect of the reduction furnace.

[0003] In the prior art, generally, methods such as minimizing the gap or filling the gap with spring pieces are adopted. The former still has the phenomenon of fluid short-circuiting. When the latter uses the two fixed barrel walls of the inner barrel and the jacket barrel to prevent the spring pieces from moving, some spring pieces will warp due to being squeezed, which will also lead to the exposure of the gap. If screw fasteners are used to fix the spring pieces, holes need to be drilled in the flow guide plate, which is also likely to cause fluid leakage and short-circuiting from the holes of the flow guide plate. Summary of the Invention

[0004] The utility model provides a fixing structure of a spring piece in a flow guide plate of a polysilicon reduction furnace, which can overcome certain or some defects of the prior art.

[0005] According to the fixing structure of the spring piece in the flow guide plate of the polysilicon reduction furnace of the utility model, it includes an inner cylinder body, and a jacket cylinder body sleeved outside the inner cylinder body. A cooling space is formed between the inner cylinder body and the jacket cylinder body. A flow guide plate is arranged at the cooling space. A gap is formed between the flow guide plate and the jacket cylinder body. A spring piece is arranged on one side of the free end of the flow guide plate. At least a part of the spring piece is in abutting cooperation with the jacket cylinder body. At least one pressing strip is arranged on the side of the spring piece away from the flow guide plate. The side of the pressing strip away from the jacket cylinder body is in welding cooperation with the flow guide plate. The pressing strip is used to maintain the state of the spring piece abutting against the jacket cylinder body and the flow guide plate.

[0006] Preferably, the spring piece includes a horizontal part cooperating with the flow guide plate and a vertical part cooperating with the jacket cylinder body. The vertical part extends along the axial direction of the jacket cylinder body and is in abutting cooperation with the jacket cylinder body.

[0007] Preferably, at least a part of the vertical part extends into the gap.

[0008] Preferably, there are multiple pressing strips and they are arranged circumferentially along the jacket cylinder body. The circumferential distance L between two adjacent pressing strips ≤ 200 mm.

[0009] Preferably, the bead is arranged parallel to the flow guide plate, and the bead is connected to the flow guide plate by spot welding.

[0010] Preferably, the flow guide plate is vertically matched with the outer wall of the inner cylinder body, and the flow guide plate is welded to the outer wall of the inner cylinder body.

[0011] Preferably, the fixed end of the flow guide plate is fully welded to the outer wall of the inner cylinder body.

[0012] Preferably, the horizontal part and the vertical part of the spring piece are formed by bending.

[0013] Beneficial effects: The spring piece can block the gap, thereby preventing fluid short-circuit at the gap, resulting in a decrease in the cooling effect of the cooling fluid on the reduction furnace. By setting the bead to press the spring piece, the deformation of the spring piece causing fluid short-circuit can be prevented. By fixing the bead to the flow guide plate by spot welding, the installation cost of the bead is reduced, and it is beneficial to reduce the risk of leakage of the cooling fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic cross-sectional view of the spring piece fixing structure in the flow guide plate of a polysilicon reduction furnace;

[0015] Figure 2 It is a schematic top view of the spring piece fixing structure in the flow guide plate of a polysilicon reduction furnace. DETAILED DESCRIPTION OF THE INVENTION

[0016] To further understand the content of the present invention, the present invention will be described in detail in combination with the embodiments. It should be understood that the embodiments are only for explaining the present invention rather than limiting it.

[0017] Embodiment 1

[0018] As shown in Figure 1 , this embodiment provides a spring piece fixing structure in the flow guide plate 4 of a polysilicon reduction furnace, including an inner cylinder body 1 and a clamping cylinder body 2 sleeved outside the inner cylinder body 1. A cooling space 3 is formed between the inner cylinder body 1 and the clamping cylinder body 2. A flow guide plate 4 is provided at the cooling space 3. The flow guide plate 4 is used to convey the cooling fluid for cooling the reduction furnace. In actual use, the cooling fluid flows axially in the cooling space 3. A gap 5 is formed between the flow guide plate 4 and the clamping cylinder body 2. Therefore, if the cooling fluid on one side of the flow guide plate 4 enters the other side of the flow guide plate 4 through the gap 5, a fluid short-circuit is formed, thereby reducing the cooling effect of the cooling fluid on the reduction furnace.

[0019] In this embodiment, a spring piece 6 is provided on one side of the free end of the flow guide plate 4. At least a part of the spring piece 6 abuts against the clamping cylinder body 2, so that the above-mentioned gap 5 can be closed, thereby avoiding fluid short-circuit of the cooling fluid and preferably ensuring the cooling efficiency of the cooling fluid.

[0020] Furthermore, at least one pressure strip 7 is provided on the side of the spring piece 6 away from the flow guide plate 4. The side of the pressure strip 7 away from the clamping sleeve body 2 is welded and cooperated with the flow guide plate 4. The pressure strip 7 is used to keep the spring piece 6 in a state of abutting against the clamping sleeve body 2 and the flow guide plate 4. Therefore, the spring piece 6 can maintain close fit with the inner wall of the flow guide plate 4 and the clamping sleeve body 2, thereby preferably improving the sealing performance of the spring piece 6.

[0021] Wherein, the pressure strip 7 is arranged parallel to the flow guide plate 4, and the pressure strip 7 and the flow guide plate 4 are connected by spot welding. Through this welding method, it can ensure the pressing of the pressure strip 7 on the spring piece 6, and there is no need to open holes on the flow guide plate 4 for fixing, preferably reducing the use cost, and also avoiding the risk of leakage of the cooling fluid caused by the holes.

[0022] It should be noted that the fixed end of the flow guide plate 4 is fully welded to the outer wall of the inner cylinder 1, so it can ensure the sealing fit between the flow guide plate 4 and the inner cylinder 1 and prevent the cooling fluid from leaking from the connection between the flow guide plate 4 and the inner cylinder 1.

[0023] As shown in Figure 2 , there are multiple pressure strips 7 and they are arranged circumferentially along the clamping sleeve body 2, and the circumferential distance L between two adjacent pressure strips 7 ≤ 200 mm.

[0024] It can be understood that the flow guide plate 4 is arranged in a spiral shape, and the pressure strips 7 are spaced on one side of the flow guide plate, so as to preferably maintain the pressing performance of the pressure strips 7 on the spring piece 6 and prevent the spring piece 6 from warping.

[0025] According to the solution provided in this embodiment, during installation, first weld the flow guide plate 4 to the inner cylinder 1, then place the spring piece 6 on the flow guide plate 4, then fix the pressure strip 7 and the flow guide plate 4 by spot welding, and finally install the clamping sleeve body 2, so as to realize the installation of this structure. In this structure, the cooling fluid passes through the cooling space 3 from bottom to top to cool down the reduction furnace. Through the above structure, it can avoid the short circuit caused by the cooling fluid passing through the gap 5, and at the same time, the structure is simple and the cost is low, having good economy.

[0026] Embodiment 2

[0027] As shown in Figure 1 , this embodiment provides a fixed structure of the spring piece 6 in the flow guide plate 4 of a polysilicon reduction furnace. The difference from Embodiment 1 is that the spring piece 6 includes a horizontal portion 61 cooperating with the flow guide plate 4 and a vertical portion 62 cooperating with the clamping sleeve body 2. The vertical portion 62 extends along the axial direction of the clamping sleeve body 2 and abuts against the clamping sleeve body 2, and at least a part of the vertical portion 62 extends into the gap 5.

[0028] Through the above structure, the sealing performance of the spring piece 6 can be further improved, so that it will not deform even when the coolant flow rate is large, thereby reducing the risk of fluid short circuit.

[0029] Among them, the horizontal part 61 and the vertical part 62 of the spring piece 6 are formed by bending, so it is convenient for the production of the spring piece 6.

[0030] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on one or several embodiments provided by the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0031] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the embodiments is only part of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative work without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A fixing structure for a spring piece in a flow guide plate of a polysilicon reduction furnace, comprising an inner cylinder body (1) and a clamping cylinder body (2) sleeved outside the inner cylinder body (1). A cooling space (3) is formed between the inner cylinder body (1) and the clamping cylinder body (2). A flow guide plate (4) is arranged at the cooling space (3). A gap (5) is formed between the flow guide plate (4) and the clamping cylinder body (2). It is characterized in that, One side of the free end of the deflector (4) is provided with a spring piece (6). At least a part of the spring piece (6) abuts and cooperates with the clamping sleeve body (2). At least one pressing strip (7) is provided on the side of the spring piece (6) away from the deflector (4). The side of the pressing strip (7) away from the clamping sleeve body (2) is welded and cooperated with the deflector (4). The pressing strip (7) is used to maintain the state where the spring piece (6) abuts against the clamping sleeve body (2) and the deflector (4).

2. The spring plate fixing structure in the polysilicon reduction furnace deflector according to claim 1, characterized in that, The spring piece (6) includes a horizontal part (61) that cooperates with the deflector (4) and a vertical part (62) that cooperates with the clamping sleeve body (2). The vertical part (62) extends along the axial direction of the clamping sleeve body (2) and abuts and cooperates with the clamping sleeve body (2).

3. The spring plate fixing structure in the polysilicon reduction furnace deflector according to claim 2, wherein, At least a part of the vertical part (62) extends into the gap (5).

4. The spring plate fixing structure in the polysilicon reduction furnace deflector according to any one of claims 1-3, characterized in that, There are multiple pressing strips (7) and they are arranged circumferentially along the clamping sleeve body (2). The circumferential distance L between two adjacent pressing strips (7) is L ≤ 200 mm.

5. The spring plate fixing structure in the polysilicon reduction furnace deflector according to claim 1, characterized in that, The pressing strip (7) is arranged parallel to the deflector (4), and the pressing strip (7) and the deflector (4) are connected by spot welding.

6. The spring plate fixing structure in the polysilicon reduction furnace deflector according to claim 1, characterized in that, The deflector (4) is perpendicularly cooperated with the outer wall of the inner cylinder body (1), and the deflector (4) is welded and cooperated with the outer wall of the inner cylinder body (1).

7. The spring plate fixing structure in the polysilicon reduction furnace deflector according to claim 6, characterized in that Both sides of the fixed end of the deflector (4) are fully welded and connected to the outer wall of the inner cylinder body (1).

8. The spring plate fixing structure in the diversion plate of the polysilicon reduction furnace according to claim 2, characterized in that The horizontal part (61) and the vertical part (62) of the spring piece (6) are formed by bending.

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