Metallurgy high-efficiency energy-saving integrated special DC power supply device

Abstract

The invention discloses a metallurgical efficient energy-saving integrated special direct current power supply device which comprises a box body, the interior of the box body is divided into a transformation rectification area and an oil storage area which are arranged up and down, the transformation rectification area is divided into a transformation area and a rectification area which are arranged left and right, and the transformation area is communicated with the oil storage area through a pipeline; an air bellow is arranged at the upper part of the rectification area, a copper bar is arranged in the air bellow, the air bellow is provided with a connecting hole communicated with the transformation area, the copper bar is connected with a thyristor rectifier, one end of the air bellow is provided with a fan for blowing air into the air bellow, the other end of the air bellow is provided with an air outlet, a cooling channel is arranged in the copper bar, and the cooling channel is communicated with the oil storage area through a pipeline; an oil pump and a cooler are arranged in the oil storage area, and the output end of the oil pump is communicated with the variable pressure area and the cooling channel through pipelines to form a closed loop from the oil storage area to the variable pressure area and then to the oil storage area and from the oil storage area to the cooling channel and then to the oil storage area. The LED lamp is good in heat dissipation effect, compact in overall structure, small in occupied space and convenient to install and maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply devices, and particularly to a special DC power supply device for efficient energy-saving integration in metallurgy. Background Art

[0002] All along, AC power has often been used to supply power to metallurgical furnaces. With the continuous increase in the capacity and power level of metallurgical furnaces, using AC power has brought many problems, such as poor AC arc stability, resulting in unstable arcs of electrodes, large electrode consumption, and affecting the power grid. These disadvantages limit the application of AC power in the power supply of metallurgical furnaces. In contrast, metallurgical furnaces using DC power supply show more excellent performance in these aspects, and thus have been gradually promoted and applied in practical applications.

[0003] The DC power supply for metallurgical furnaces includes a rectifier transformer, a rectifier, and a cooling device. Usually, they are separately and integrally arranged, occupying a large area. The current is a large current, and there are high losses in the power conversion, so certain improvements are needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a special DC power supply device for efficient energy-saving integration in metallurgy to solve the problems existing in the background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A special DC power supply device for efficient energy-saving integration in metallurgy, including a box body. The interior of the box body is divided into a transformer-rectifier area and an oil storage area arranged up and down. The transformer-rectifier area is divided into a transformer area and a rectifier area arranged left and right. The transformer area is communicated with the oil storage area through a pipeline. A wind box is arranged at the upper part of the rectifier area. Copper bars are arranged in the wind box. The wind box is provided with connection holes for communicating with the transformer area. A thyristor rectifier is connected to the copper bars. A fan for blowing air into the wind box is arranged at one end of the wind box, and an air outlet is arranged at the other end of the wind box. Cooling channels are arranged inside the copper bars. The cooling channels are communicated with the oil storage area through pipelines. An oil pump and a cooler are arranged in the oil storage area. The output end of the oil pump is communicated with the transformer area and the cooling channels through pipelines, forming a closed loop of oil from the oil storage area to the transformer area and then back to the oil storage area, and oil from the oil storage area to the cooling channels and then back to the oil storage area.

[0006] As a preference of this technical solution, a temperature sensor and a liquid level sensor are arranged in the oil storage area.

[0007] As a preference of this technical solution, the pipelines are located on both sides of the box body. The pipelines include main pipelines, transition pipelines, first branch pipelines and second branch pipelines. One end of the main pipeline on one side of the box body is connected to the output end of the oil pump, and the other end is connected to the transition pipeline. One end of the main pipeline on the other side of the box body is connected to the box body, and the other end is connected to the transition pipeline. One ends of the first branch pipeline and the second branch pipeline are both connected to the transition pipeline. The other end of the first branch pipeline is communicated with the voltage transformation area, and the other end of the second branch pipeline is communicated with the cooling channel.

[0008] As a preference of this technical solution, it further includes a controller, and the oil pump, cooler, temperature sensor and liquid level sensor are all electrically connected to the controller.

[0009] As a preference of this technical solution, valves are arranged on both the first branch pipeline and the second branch pipeline.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] 1. The interior of the box body of the present invention is divided into a voltage transformation and rectification area and an oil storage area which are arranged up and down. The voltage transformation and rectification area is divided into a voltage transformation area and a rectification area which are arranged left and right. The overall structure is compact, occupying a small space and being convenient for installation.

[0012] 2. The present invention fills the oil storage area with dielectric oil, which can cool the transformer in the voltage transformation area and the rectifier in the rectification area, improve the heat dissipation effect, avoid problems caused by too high equipment temperature, and extend the service life.

[0013] 3. The present invention can cool the equipment in the voltage transformation area and the rectification area separately, which is convenient for maintenance.

[0014] 4. The present invention improves the automation effect through automatic control equipment, and further reduces energy consumption. Description of the Drawings

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0016] Figure 2 It is a side view structure schematic diagram of the present invention.

[0017] Figure 3 It is a longitudinal cross-sectional schematic diagram of the present invention.

[0018] Figure 4 It is another longitudinal cross-sectional schematic diagram of the present invention.

[0019] In the figure: 1. Box body; 2. Air box; 3. Copper busbar; 4. Thyristor rectifier; 5. Fan; 6. Main pipeline; 7. Transition pipeline; 8. Second branch pipeline; 9. First branch pipeline. Detailed Embodiments

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 , a special DC power supply device for efficient energy saving and integration in metallurgy of the present invention includes a box body 1. The interior of the box body 1 is divided into a transformer-rectifier area and an oil storage area which are arranged up and down by a partition. The transformer-rectifier area is divided into a transformer area and a rectifier area which are arranged left and right by a partition. The transformer area is communicated with the oil storage area through a pipeline. A wind box 2 is arranged on the upper part of the rectifier area. Both ends of the wind box 2 are fixed on the inner wall of the rectifier area. A copper row 3 is arranged in the wind box 2. The wind box 2 is provided with a connection hole for communicating with the transformer area. The connection hole is arranged on the side wall of the wind box 2. A through hole is also arranged on the partition separating the transformer area and the rectifier area, so that the transformer can be electrically connected with the copper row 3 through the through hole and the connection hole. A thyristor rectifier 4 is connected to the copper row 3. One end of the wind box 2 is provided with a fan 5 for blowing air into the wind box 2. The fan 5 is arranged on the outer wall of the box body 1. An air hole is opened on the outer wall of the box body 1. The fan can blow the external air into the wind box 2. The other end of the wind box 2 is provided with an air outlet. The air outlet is arranged on the side wall of one end of the wind box 2. A through hole is also arranged on the side wall of the box body 1, so that the fan 5 blows the air into the wind box 2 and blows the air out of the box body 1 through the air outlet and the through hole. A cooling channel is arranged inside the copper row 3. The cooling channel is communicated with the oil storage area through a pipeline. An oil pump and a cooler are arranged in the oil storage area. The output end of the oil pump is communicated with the transformer area and the cooling channel through a pipeline, forming a closed loop of oil from the oil storage area to the transformer area and then back to the oil storage area and oil from the oil storage area to the cooling channel and then back to the oil storage area.

[0022] When the present invention is specifically implemented, a temperature sensor and a liquid level sensor are arranged in the oil storage area. The pipelines are located on both sides of the box body 1. The pipelines include a main pipeline 6, a transition pipeline 7, a first branch pipeline 9 and a second branch pipeline 8, that is, there are pipelines on both sides of the box body 1. One end of the main pipeline 6 on one side of the box body 1 is connected to the output end of the oil pump, and the other end is connected to the transition pipeline 7. One end of the main pipeline 6 on the other side of the box body 1 is connected to the box body 1, and the other end is connected to the transition pipeline 7. One ends of the first branch pipeline 9 and the second branch pipeline 8 are both connected to the transition pipeline 7. The other end of the first branch pipeline 9 is communicated with the transformer area, and the other end of the second branch pipeline 8 is communicated with the cooling channel.

[0023] When the present invention is specifically implemented, it further includes a controller. The oil pump, the cooler, the temperature sensor and the liquid level sensor are all electrically connected to the controller. The temperature sensor can also be arranged on the pipeline at the oil outlet of the transformer area and the pipeline at the outlet of the cooling channel. Valves are arranged on both the first branch pipeline and the second branch pipeline, which can respectively control the cooling of the transformer and the rectifier.

[0024] When the present invention is specifically used, dielectric oil is filled into the oil storage area. The oil pump transports the dielectric oil in the oil storage area to the voltage transformation area and the cooling channel through the main pipeline, the transition pipeline, the first branch pipeline and the second branch pipeline, and cools the transformer in the voltage transformation area and the rectifier copper bar connected thereto respectively. Finally, the dielectric oil is transported back to the oil storage area through the main pipeline, the transition pipeline, the first branch pipeline and the second branch pipeline on the other side of the box body. When the temperature of the rectifier is too high or a fault occurs in the pipeline of the rectifier, the rectifier in the air box is air-cooled by starting the fan.

[0025] Finally, it should be noted that the above embodiments are only specific embodiments of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A special DC power supply device for integrated metallurgy with high efficiency and energy saving, characterized in that: It includes a box body, the interior of which is partitioned into a step-down rectification area and an oil storage area arranged vertically. The step-down rectification area is partitioned into a step-down area and a rectification area arranged horizontally. The step-down area is communicated with the oil storage area through a pipeline. A wind box is arranged above the rectification area. A copper busbar is arranged inside the wind box. The wind box is provided with a connection hole for communicating with the step-down area. A thyristor rectifier is connected to the copper busbar. One end of the wind box is provided with a fan for blowing air into the wind box, and the other end is provided with an air outlet. A cooling channel is arranged inside the copper busbar, and the cooling channel is communicated with the oil storage area through a pipeline. An oil pump and a cooler are arranged in the oil storage area. The output end of the oil pump is communicated with the step-down area and the cooling channel through pipelines, forming a closed loop of oil from the oil storage area to the step-down area and then back to the oil storage area, and oil from the oil storage area to the cooling channel and then back to the oil storage area.

2. The integrated special DC power supply device for efficient energy saving in metallurgy according to claim 1, characterized in that: A temperature sensor and a liquid level sensor are arranged in the oil storage area.

3. The integrated special DC power supply device for efficient energy saving in metallurgy according to claim 1, wherein: The pipelines are located on both sides of the box body. The pipelines include a main pipeline, a transition pipeline, a first branch pipeline and a second branch pipeline. One end of the main pipeline on one side of the box body is connected to the output end of the oil pump, and the other end is connected to the transition pipeline. One end of the main pipeline on the other side of the box body is connected to the box body, and the other end is connected to the transition pipeline. One ends of the first branch pipeline and the second branch pipeline are both connected to the transition pipeline. The other end of the first branch pipeline is communicated with the step-down area, and the other end of the second branch pipeline is communicated with the cooling channel.

4. The integrated special DC power supply device for efficient energy saving in metallurgy according to claim 2, characterized in that: It further includes a controller, and the oil pump, the cooler, the temperature sensor and the liquid level sensor are all electrically connected to the controller.

5. The integrated special DC power supply device for efficient energy saving in metallurgy according to claim 3, characterized in that: Valves are arranged on both the first branch pipeline and the second branch pipeline.

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