Power supply system for reduction furnace

Abstract

The utility model relates to industrial power supply technical field especially is related to a power supply system for reduction furnace, mainly includes: transformer, first conductive copper bar, power cabinet and second conductive copper bar etc.

Description

Technical Field

[0001] This utility model relates to the field of industrial power supply technology, and in particular to a power supply system for a reduction furnace. Background Technology

[0002] In industrial sectors such as polysilicon production, reduction furnaces are critical core equipment that use electric heating to deposit gaseous silicon sources into solid silicon rods. The power supply system provides the enormous electrical energy required by the reduction furnace.

[0003] Currently, the selection of conductive copper busbars in power systems is mainly based on the rated current of the upstream transformer. This selection method aims to ensure that the entire power circuit can theoretically withstand the maximum output current of the transformer, thereby guaranteeing the absolute safety of the system.

[0004] However, in actual production and operation, the above selection method leads to a serious problem of "overcapacity" in the conductive copper busbars, meaning that the current-carrying capacity of the busbars is too large. Since the cross-sectional area of ​​the copper busbar directly determines the current carrying capacity and the amount of copper used, an excessive margin means that more copper material needs to be consumed, directly increasing the material cost of the power system. In today's fiercely competitive market, with continuously expanding project scale and international copper prices remaining high for a long time, reducing copper consumption has become an urgent technical problem to be solved. Utility Model Content

[0005] The purpose of this invention is to provide a power supply system for a reduction furnace to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is:

[0007] The power supply system for the reduction furnace includes:

[0008] transformer;

[0009] The first conductive copper busbar has one end connected to the output terminal of the transformer;

[0010] The power control cabinet has its input terminals connected to the other end of the first conductive copper busbar.

[0011] The second conductive copper busbar has one end connected to the output terminal of the power control cabinet and the other end connected to the electrode of the reduction furnace.

[0012] Both the first conductive copper busbar and the second conductive copper busbar are single-layer structures.

[0013] Optionally, the current-carrying capacity of the first conductive copper busbar and the second conductive copper busbar is matched with the actual operating current of the reduction furnace.

[0014] Optionally, the first conductive copper busbar adopts a three-section structure, including:

[0015] The first end connection part is connected to the output terminal of the transformer;

[0016] The first main body is connected to the first head end connecting part;

[0017] The first tail end connection part has one end connected to the first main body part and the other end connected to the input terminal of the power adjustment cabinet.

[0018] Optionally, the first main body is a rigid connection segment.

[0019] Optionally, the first head end connecting portion and / or the first tail end connecting portion are flexible connecting segments.

[0020] Optionally, the second conductive copper busbar includes:

[0021] The second connection part is connected to the output terminal of the power adjustment cabinet;

[0022] The second main body is connected at one end to the second connecting part and at the other end to the reduction furnace electrode.

[0023] Optionally, the second connecting part is a flexible connecting segment.

[0024] Optionally, the second main body is a rigid connection section.

[0025] Optionally, the second main body includes:

[0026] The second main body steering part is connected to the second connecting part;

[0027] The second main body extension has one end connected to the second main body turning part and the other end connected to the reduction furnace electrode.

[0028] Optionally, the second main body steering portion is connected at an angle between the second connecting portion and the second main body extension portion.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] In this invention, taking advantage of the fact that the operating current of the reduction furnace is much lower than the rated current of the transformer, the current-carrying capacity of the first and second conductive copper busbars is designed as a single-layer structure that matches the actual operating current of the reduction furnace. This completely solves the problem of "capacity overkill" caused by the previous selection of copper busbars based on the rated current of the transformer, which required the use of double-layer or multi-layer copper busbar structures. This optimized design brings several significant advantages: Firstly, while ensuring the safe operation of the power circuit, it significantly reduces the cross-sectional area and copper consumption of the conductive copper busbars, effectively alleviating the cost pressure on enterprises in a high copper price environment. Secondly, compared with double-layer or multi-layer structures, the single-layer structure is not only easier to install and more reliable in connection, but also reduces the risk of overheating caused by loose screws later, further improving the system's economy, practicality, and safety. Using the power system of this application, the material and installation costs of the power system on a 200,000-ton polysilicon production line can be reduced by approximately 40 million yuan.

[0031] Furthermore, by designing the second main body turning part to be arranged at an angle, compared with the existing technology of a third conductive copper busbar arranged in two vertical layers, this layout effectively shortens the current path, further saves copper materials, and reduces the overall cost. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the core structure of this application;

[0034] Figure 2 This is a schematic diagram of the structure of an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the existing technology structure.

[0036] Figure label:

[0037] 1. Transformer; 11. Output terminals;

[0038] 2. First conductive copper busbar; 21. First head end connection part; 22. First main body part; 23. First tail end connection part;

[0039] 3. Power control cabinet; 31. Input terminals; 32. Output terminals;

[0040] 4. Second conductive copper busbar; 41. Second connecting part; 42. Second main body part; 421. Second main body turning part; 422. Second main body extension part;

[0041] 5. Support plate; 6. Support frame; 7. Insulator; 8. Reduction furnace; 9. Third conductive copper busbar. Detailed Implementation

[0042] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0043] Given the large amount of conductive copper busbars currently used, which in turn increases the material costs of power supply systems.

[0044] like Figures 1-2 As shown, this utility model embodiment provides a power supply system for a reduction furnace, which mainly includes: a transformer 1, a first conductive copper busbar 2, a power regulating cabinet 3, and a second conductive copper busbar 4.

[0045] Transformer 1 is configured to reduce the 20kV high voltage input from the power grid to a series of lower voltages suitable for use in reduction furnace 8.

[0046] One end of the first conductive copper busbar 2 is connected to the output terminal 11 of the transformer 1, and the other end is connected to the input terminal 31 of the power control cabinet 3. The first conductive copper busbar 2 is configured to safely transmit the electrical energy output from the transformer 1 to the power control cabinet 3 in a low-loss manner.

[0047] The power control cabinet 3 is configured to receive electrical energy from the transformer 1 and steplessly regulate it to meet the specific power requirements of the reduction furnace 8 in different operating stages (such as high voltage and low current in the early stage and low voltage and high current in the later stage).

[0048] One end of the second conductive copper busbar 4 is connected to the output terminal 32 of the power regulating cabinet 3, and the other end is connected to the electrode of the reduction furnace 8. The second conductive copper busbar 4 is configured to safely and efficiently deliver the electrical energy, which has been precisely regulated by the power regulating cabinet 3, to the reduction furnace 8.

[0049] Among them, the current carrying capacity of the first conductive copper busbar 2 and the second conductive copper busbar 4 are matched with the actual working current of the reduction furnace 8. Both adopt a single-layer structure design, thereby fundamentally solving the problem of "overcapacity" caused by the original selection based on the rated current of the transformer 1.

[0050] like Figure 1 As shown, the first conductive copper busbar 2 adopts a three-section structure.

[0051] Specifically, the three-section structure of the first conductive copper busbar 2 mainly includes: a first head end connection part 21, a first main body part 22, and a first tail end connection part 23.

[0052] One end of the first head-end connection portion 21 is connected to the output terminal 11 of the transformer 1. The other end of the first body portion 22 is connected to the first head-end connection portion 21. One end of the first tail-end connection portion 23 is connected to the other end of the first body portion 22, and the other end is connected to the input terminal 31 of the power regulating cabinet 3.

[0053] More specifically, the first main body 22 is a rigid connection section (hard copper busbar) that carries a large current. The first head connection 21 and / or the first tail connection 23 are flexible connection sections (soft connection). For example, the first head connection 21 and / or the first tail connection 23 are copper braided strips. Their core functions are: on the one hand, to absorb the vibration and displacement of the transformer 1 end, avoiding the transfer of stress to the power regulating cabinet 3; on the other hand, to compensate for the thermal expansion and contraction of the rigid parts such as the first main body 22 caused by the current heating effect, avoiding excessive mechanical stress; in addition, to provide a certain adjustment margin to ensure reliable connection.

[0054] The second conductive copper busbar 4 mainly includes several parts such as the second connecting part 41 and the second main body part 42.

[0055] The second connecting part 41 is connected to the output terminal 32 of the power regulating cabinet 3. One end of the second main body part 42 is connected to the second connecting part 41, and the other end is connected to the electrode of the reduction furnace 8.

[0056] More specifically, the second main body 42 is a rigid connection section (hard copper busbar) that carries a large current. The second connection section 41 is a flexible connection section (soft connection). That is, the second connection section 41, like the first head connection section 21 and the first tail connection section 23, is a copper braided strip. Its core functions are: on the one hand, to effectively buffer and isolate vibration and displacement from the output end of the power control cabinet 3, preventing stress from being transmitted to the precision reduction furnace 8; on the other hand, to compensate for the thermal expansion and contraction of the rigid parts such as the second main body 42 caused by the thermal effect of the current, avoiding excessive mechanical stress; and in addition, to provide a certain adjustment margin to ensure reliable connection.

[0057] Furthermore, the second main body 42 mainly includes several parts such as the second main body turning part 421 and the second main body extension part 422.

[0058] The second main body turning part 421 is connected to the second connecting part 41. The second main body turning part 421 realizes the spatial conversion of the current path, thereby adapting to the equipment layout and establishing an accurate mechanical interface for the connection of the electrodes of the reduction furnace 8.

[0059] One end of the second main body extension 422 is connected to the second main body turning part 421, and the other end is connected to the electrode of the reduction furnace 8. The second main body extension 422 forms the final segment of the current path, reliably delivering current to the electrode of the reduction furnace 8 and achieving a firm mechanical connection thereto.

[0060] Furthermore, the second main body turning part 421 is connected at an angle between the second connecting part 41 and the second main body extension part 422.

[0061] The inclined arrangement of the second main body steering unit 421 compared to Figure 3 As shown, the inclined design of the third conductive copper busbar 9, which has a double-layer structure and is arranged vertically in the prior art, has multiple advantages: on the one hand, it saves copper material and reduces costs by shortening the path; on the other hand, it makes the structure more compact and reduces space occupation; at the same time, its single-layer structure effectively avoids the additional losses caused by magnetic field interference in the double-layer parallel arrangement (i.e., the double-layer structure of the third conductive copper busbar 9), and by improving the current distribution, it ultimately significantly improves the power transmission efficiency of the system.

[0062] It should be noted that, for example Figure 2 As shown, the power supply system for the reduction furnace in this embodiment also includes multiple sets of support plates 5, support frames 6, insulators 7, and other components. The purpose is to reliably fix and support high-current conductors such as the first conductive copper busbar 2 and the second conductive copper busbar 4, providing necessary electrical insulation to ensure the structural stability, electrical safety, and connection reliability of the main circuit during long-term operation. This part is prior art and will not be elaborated upon in this embodiment.

[0063] Similarly, the transformer 1 and the power regulating cabinet 3 in this embodiment are existing technologies, and will not be described in detail here.

[0064] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A power supply system for a reduction furnace, characterized in that, include: transformer; The first conductive copper busbar has one end connected to the output terminal of the transformer; The power control cabinet has its input terminals connected to the other end of the first conductive copper busbar. The second conductive copper busbar has one end connected to the output terminal of the power adjustment cabinet and the other end connected to the electrode of the reduction furnace; wherein, both the first conductive copper busbar and the second conductive copper busbar are single-layer structures.

2. The power supply system for the reduction furnace according to claim 1, characterized in that, The current-carrying capacity of the first and second conductive copper busbars is matched with the actual operating current of the reduction furnace.

3. The power supply system for the reduction furnace according to claim 1, characterized in that, The first conductive copper busbar adopts a three-section structure, including: a first head end connection part, which is connected to the output terminal of the transformer; a first body part, which is connected to the first head end connection part; and a first tail end connection part, one end of which is connected to the first body part and the other end of which is connected to the input terminal of the power regulating cabinet.

4. The power supply system for the reduction furnace according to claim 3, characterized in that, The first main body is a rigid connection section.

5. The power supply system for the reduction furnace according to claim 3, characterized in that, The first head end connecting portion and / or the first tail end connecting portion are flexible connecting segments.

6. The power supply system for the reduction furnace according to claim 1, characterized in that, The second conductive copper busbar includes: a second connecting part, which is connected to the output terminal of the power adjustment cabinet; and a second main body, one end of which is connected to the second connecting part and the other end of which is connected to the electrode of the reduction furnace.

7. The power supply system for the reduction furnace according to claim 6, characterized in that, The second connecting part is a flexible connecting section.

8. The power supply system for the reduction furnace according to claim 6, characterized in that, The second main body is a rigid connection section.

9. The power supply system for the reduction furnace according to claim 6 or 8, characterized in that, The second main body includes: a second main body turning part, which is connected to the second connecting part; and a second main body extension part, one end of which is connected to the second main body turning part and the other end of which is connected to the reduction furnace electrode.

10. The power supply system for the reduction furnace according to claim 9, characterized in that, The second main body steering part is connected at an angle between the second connecting part and the second main body extension part.

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