Ultrahigh-power three-phase electric arc furnace transformer

Abstract

The utility model discloses an ultrahigh-power three-phase electric arc furnace transformer which comprises a box body and an assembly plate arranged at the upper end of the box body, a voltage regulation and control device is fixedly installed at the upper end of the assembly plate, electromagnetic wires are fixedly installed on the surfaces of the two sides of the voltage regulation and control device, and a plurality of main transformers are fixedly installed at the upper end of the assembly plate. Two series transformers are fixedly installed on one side of the main transformer, the series transformers and the main transformer conduct electric conduction through a splayed coil, the voltage regulation and control device can send out control signals in a unified mode, electric signals are conducted through electromagnetic wires located on the two sides, and after the main transformer receives primary voltage, the primary voltage is converted into secondary voltage through electromagnetic induction. The main transformer conducts voltage through the splayed coil, high-voltage power supply is conducted on the series transformer through the splayed coil by means of the main transformer, energy transfer is achieved, the main transformer conducts the received current through the splayed coil after voltage reduction is completed, and the energy transfer is achieved. And finally, the current is fused with low-voltage current generated by the low-voltage wire outlet end, so that high-efficiency control of the three-phase electric switch is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of arc furnace transformers, in particular to an ultra-high power three-phase arc furnace transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage.

[0003] Among the electric arc furnace transformers required for electric arc furnace steelmaking, the electric arc furnace transformers usually available on the market usually use three independent three-phase electric switches for voltage conduction control when using three-phase electricity for voltage transformation. The three-phase arc furnace transformer designed in this way wastes more space and the manufacturing cost will also increase accordingly. At the same time, when the main transformer low-voltage coil and the series transformer low-voltage coil are connected, the electromagnetic coils are often wound separately, resulting in the problem that multiple connections are difficult to distinguish, and the reliability of the low-voltage coil operation cannot be guaranteed.

[0004] Therefore, we offer an ultra-high power three-phase arc furnace transformer. Utility Model Content

[0005] The purpose of this utility model is to provide an ultra-high power three-phase arc furnace transformer to address the above-mentioned technical problems, so as to achieve the effect of efficient electromagnetic control to ensure the reliability of low-voltage coil operation.

[0006] In view of this, the present invention provides an ultra-high power three-phase arc furnace transformer, comprising a box body and an assembly plate arranged at the upper end of the box body, a voltage regulating device is fixedly installed on the upper end of the assembly plate, and electromagnetic wires are fixedly installed on both side surfaces of the voltage regulating device, and several main transformers are fixedly installed on the upper end of the assembly plate, and two series transformers are fixedly installed on one side of the main transformer, and the series transformers and the main transformer are electrically conducted through an eight-shaped coil.

[0007] Preferably, a high-voltage output terminal is fixedly installed on the upper end of the main transformer, a low-voltage output terminal is fixedly installed on the upper end of the series transformer, the electromagnetic wire on one side surface of the voltage regulating device is connected to the main transformer, and the electromagnetic wire on the other side surface of the voltage regulating device is connected to the series transformer.

[0008] Preferably, a tap switch is provided at the upper end of the voltage regulating device, and an output power knob is provided at the upper end of the voltage regulating device, and the output power knob is located at one side of the tap switch.

[0009] Preferably, a shell is fixedly mounted on the upper end of the assembly plate, a ventilation grille is provided on the surface of the shell, a rotating rod is rotatably mounted on one side surface of the shell, a warehouse door is fixedly mounted on the surface of the rotating rod, and a handle is fixedly mounted on the surface of the warehouse door.

[0010] Preferably, a mounting bracket is installed on the upper end of the assembly plate, an oil pillow is fixedly installed on the upper end of the mounting bracket, and a fixing screw is riveted on one side of the mounting bracket.

[0011] Preferably, a fixing component is fixedly mounted on the upper end of the assembly plate, and a receiving device is fixedly mounted on the upper end of the fixing component.

[0012] Preferably, an I-shaped support frame is fixedly mounted on the lower surface of the box body, heat dissipation pipes are fixedly mounted on both side surfaces of the box body, and heat dissipation grilles are fixedly mounted on both side surfaces of the box body.

[0013] Compared with the prior art, the present invention provides an ultra-high power three-phase arc furnace transformer with the following beneficial effects:

[0014] 1. In the present invention, the voltage control device will uniformly send out control signals to transmit electrical signals through the electromagnetic wires on both sides. After the main transformer receives the primary voltage, it will transmit the voltage through the figure-eight coil through electromagnetic induction. The main transformer will use the figure-eight coil to supply high voltage to the series transformer to achieve energy transfer. The main transformer will step down the received current. The current after stepping down will be transmitted through the figure-eight coil and finally merged with the low-voltage current generated by the low-voltage output terminal, thereby completing the efficient control of the three-phase electric switch.

[0015] 2. In the present invention, the high-voltage outlet terminal plays the role of receiving voltage and current. The generated current can be received through the high-voltage outlet terminal. The combined voltage after the voltage reduction is completed can be output to the outside through the set low-voltage outlet terminal, which plays a transmission effect. The electromagnetic wire is connected to the main transformer and the series transformer respectively, which can ensure the stability of voltage regulation and the stability of current output when the figure-eight coil conducts current. The tap switch set at the upper end of the voltage regulating device can control the flow of current and voltage in and out. The output power knob can be used to control the amount of voltage output power.

[0016] 3. In the present invention, transformer oil is filled inside the oil pillow, which can ensure that the transformer is filled with transformer oil at any temperature and operating conditions during use. The mounting bracket can be riveted to the upper end of the assembly plate by means of the provided fixing screws. The provided fixing components can be used to fix the receiving device on its upper end, and the receiving device can be used for receiving and transmitting signals.

[0017] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view structural diagram of an ultra-high power three-phase arc furnace transformer proposed in the utility model;

[0019] Figure 2 This is a schematic diagram of the shell structure of an ultra-high power three-phase arc furnace transformer proposed in the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the shell of an ultra-high power three-phase arc furnace transformer proposed in the present invention;

[0021] Figure 4 This is a schematic diagram of the series transformer structure of an ultra-high power three-phase arc furnace transformer proposed in the utility model.

[0022] In the figure: 1. Box body; 2. Heat dissipation grille; 3. Heat dissipation pipe; 4. I-shaped support frame; 5. Outer shell; 6. Assembly plate; 7. Mounting frame; 8. Oil pillow; 9. Fixing screws; 10. Receiver; 11. Ventilation grille; 12. Fixing assembly; 13. Turnbar; 14. Door; 15. Handle; 16. Voltage control device; 17. Tap changer; 18. Output power knob; 19. Main transformer; 20. Series transformer; 21. Figure-eight coil; 22. Low-voltage outlet terminal; 23. High-voltage outlet terminal; 24. Electromagnetic wire. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0025] Example 1: An ultra-high power three-phase arc furnace transformer, such as Figure 1-Figure 4As shown, it includes a box body 1 and an assembly plate 6 arranged at the upper end of the box body 1. A voltage regulating device 16 is fixedly installed on the upper end of the assembly plate 6. Electromagnetic wires 24 are fixedly installed on both sides of the surface of the voltage regulating device 16. A number of main transformers 19 are fixedly installed on the upper end of the assembly plate 6. Two series transformers 20 are fixedly installed on one side of the main transformer 19. The series transformers 20 and the main transformer 19 are electrically conductive through the figure-eight coil 21. The assembly plate 6 provides a mounting carrier. When current flows, the voltage regulating device 16 is located on one side of the main transformer 19 and the series transformer 20. After the voltage regulating device 16 controls the voltage and sends a switch signal, in order to achieve a voltage reduction effect, the voltage regulating device 16 will uniformly send a control signal to The electrical signal is transmitted through the electromagnetic wires 24 on both sides. After the main transformer 19 receives the primary voltage, the main transformer 19 will transmit the voltage through the figure-eight coil 21 through electromagnetic induction. The figure-eight coil 21 winds the main transformer low-voltage coil and the series transformer low-voltage coil with a set of wires at one time. The singleness of the line ensures the reliability of the low-voltage coil operation. The main transformer 19 is used to supply high voltage to the series transformer 20 through the figure-eight coil 21 to realize energy transfer. When the voltage is adjusted, the main transformer 19 will step down the received current and conduct the current after the step-down through the figure-eight coil 21, and finally merge it with the low-voltage current generated by the low-voltage outlet terminal 22, thereby completing the efficient control of the three-phase electric switch.

[0026] like Figure 1-Figure 4 As shown, a high-voltage outlet terminal 23 is fixedly installed on the upper end of the main transformer 19, a low-voltage outlet terminal 22 is fixedly installed on the upper end of the series transformer 20, an electromagnetic wire 24 on one side of the voltage regulating device 16 is connected to the main transformer 19, and an electromagnetic wire 24 on the other side of the voltage regulating device 16 is connected to the series transformer 20, a tap changer 17 is provided on the upper end of the voltage regulating device 16, and an output power knob 18 is provided on the upper end of the voltage regulating device 16, and the output power knob 18 is located on one side of the tap changer 17. The high-voltage outlet terminal 23 plays the role of receiving voltage and current, which can be The high-voltage outlet terminal 23 receives the generated current, and through the low-voltage outlet terminal 22, the combined voltage after the voltage reduction is completed can be output to the outside, thereby achieving a transmission effect. The electromagnetic wire 24 is respectively connected to the main transformer 19 and the series transformer 20, which can ensure the stability of voltage regulation, and when the figure-eight coil 21 conducts current, it can ensure the stability of current output. The tap switch 17 set at the upper end of the voltage regulating device 16 can serve as a switch to control the flow of current and voltage in and out. The output power knob 18 can be used to control the amount of voltage output power.

[0027] like Figure 1-Figure 4As shown, a shell 5 is fixedly installed on the upper end of the assembly plate 6, and a ventilation grille 11 is provided on the surface of the shell 5. A rotating rod 13 is rotatably installed on the surface of one side of the shell 5, and a compartment door 14 is fixedly installed on the surface of the rotating rod 13. A handle 15 is fixedly installed on the surface of the compartment door 14. The shell 5 is set up to protect the internal main transformer 19 and the series transformer 20. The ventilation grille 11 provided on the surface of the shell 5 can make the interior of the shell 5 an air flow space, which can prevent the internal equipment of the shell 5 from spontaneous combustion due to excessive temperature caused by lack of air circulation. When the voltage regulating device 16 needs to be used, the compartment door 14 is pulled up by the handle 15 to drive the rotating rod 13 to rotate, so that the operator can use the voltage regulating device 16 conveniently.

[0028] Example 2: An ultra-high power three-phase arc furnace transformer, such as Figure 1-Figure 4 As shown, a mounting bracket 7 is installed on the upper end of the assembly plate 6, and an oil pillow 8 is fixedly installed on the upper end of the mounting bracket 7. A fixing screw 9 is riveted on one side of the mounting bracket 7. A fixing component 12 is fixedly installed on the upper end of the assembly plate 6, and a receiving device 10 is fixedly installed on the upper end of the fixing component 12. Through the setting of the mounting bracket 7, the oil pillow 8 can be fixedly installed on its upper end. The interior of the oil pillow 8 is filled with transformer oil, which can ensure that the transformer is filled with transformer oil at any temperature and operating conditions during use. Through the setting of the fixing screws 9, the mounting bracket 7 can be riveted to the upper end of the assembly plate 6 through the fixing screws 9. Through the setting of the fixing component 12, the receiving device 10 can be fixedly installed on its upper end. The receiving device 10 can be used for signal reception and transmission.

[0029] like Figure 1-Figure 4 As shown, an I-shaped support frame 4 is fixedly installed on the lower surface of the box body 1, and heat pipes 3 are fixedly installed on both side surfaces of the box body 1. Heat dissipation grilles 2 are fixedly installed on both side surfaces of the box body 1. Through the provided heat dissipation pipes 3 and the heat dissipation grilles 2, when the transformer is working, the heat dissipation grilles 2 and the heat dissipation pipes 3 interact with each other through physical cooling, so that the temperature of the transformer will not overheat during operation, and the phenomenon of spontaneous combustion inside the transformer can be avoided. Through the provided I-shaped support frame 4, the arc furnace transformer can be installed off the ground, so that the transformer equipment will not be damaged.

[0030] Working principle: When the current is flowing, the voltage regulating device 16 is located on one side of the main transformer 19 and the series transformer 20. After the voltage regulating device 16 controls the voltage and sends a switching signal, in order to achieve the voltage reduction effect, the electromagnetic wires 24 on both sides of the voltage regulating device 16 will conduct the electrical signal sent by the voltage regulating device 16. After the main transformer 19 receives the primary voltage, it will conduct the voltage through the figure-eight coil 21 through electromagnetic induction. The figure-eight coil 21 winds the main transformer low-voltage coil and the series transformer low-voltage coil with a set of wires at one time. The singleness of the line ensures the reliability of the low-voltage coil operation. The main transformer 19 supplies high voltage to the series transformer 20 through the figure-eight coil 21 to realize energy transfer. When the voltage is regulated, the main transformer 19 will step down the received current and conduct the current after the step-down through the figure-eight coil 21, and finally merge it with the low-voltage current generated by the low-voltage outlet 22, thereby completing the efficient control of the three-phase electric switch. The high-voltage outlet 23 plays the role of receiving voltage and current. The current generated can be received through the high-voltage outlet 23, and the low-voltage outlet 22 can output the combined voltage after the step-down to the outside, thereby achieving a transmission effect. The electromagnetic wire 24 is respectively connected to the main transformer 19 and the series transformer The device 20 is connected to ensure the stability of voltage regulation, and when the figure eight coil 21 conducts current, the stability of current output can be guaranteed. The tap changer 17 provided at the upper end of the voltage regulating device 16 can be used to control the flow of current and voltage into and out of the switch. The output power knob 18 is provided to control the amount of voltage output power. When the voltage regulating device 16 needs to be used, the handle 15 is used to pull the compartment door 14 upward to drive the rotating rod 13 to rotate, so that the operator can use the voltage regulating device 16 conveniently. The interior of the oil pillow 8 is filled with transformer oil, which can ensure that the transformer is in any state during use. At any temperature and operating condition, it is filled with transformer oil. Through the provided fixing screws 9, the mounting frame 7 can be riveted and installed on the upper end of the assembly plate 6. Through the provided fixing component 12, the receiving device 10 can be fixedly installed on its upper end. The receiving device 10 can be used for receiving and transmitting signals. Through the provided heat dissipation pipe 3 and the heat dissipation grille, when the transformer is working, the interaction between the heat dissipation grille 2 and the heat dissipation pipe 3 can prevent the temperature of the transformer from overheating, avoiding the phenomenon of spontaneous combustion inside the outgoing transformer. Through the provided I-shaped support frame 4, the arc furnace transformer can be installed off the ground, so that the transformer equipment will not be damaged.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultra-high power three-phase arc furnace transformer, comprising a box (1) and an assembly plate (6) arranged at the upper end of the box (1), characterized in that: A voltage regulating device (16) is fixedly mounted on the upper end of the assembly plate (6), and electromagnetic wires (24) are fixedly mounted on both side surfaces of the voltage regulating device (16). A plurality of main transformers (19) are fixedly mounted on the upper end of the assembly plate (6), and two series transformers (20) are fixedly mounted on one side of the main transformer (19). The series transformers (20) and the main transformer (19) are electrically conductively connected via a figure-eight coil (21).

2. The ultra-high power three-phase arc furnace transformer according to claim 1, characterized in that: A high-voltage outlet terminal (23) is fixedly mounted on the upper end of the main transformer (19), a low-voltage outlet terminal (22) is fixedly mounted on the upper end of the series transformer (20), the electromagnetic wire (24) on one side surface of the voltage regulating device (16) is connected to the main transformer (19), and the electromagnetic wire (24) on the other side surface of the voltage regulating device (16) is connected to the series transformer (20).

3. The ultra-high power three-phase arc furnace transformer according to claim 2, characterized in that: A tap switch (17) is provided at the upper end of the voltage regulating device (16), and an output power knob (18) is provided at the upper end of the voltage regulating device (16), and the output power knob (18) is located on one side of the tap switch (17).

4. The ultra-high power three-phase arc furnace transformer according to claim 1, characterized in that: A housing (5) is fixedly mounted on the upper end of the assembly plate (6), a ventilation grille (11) is provided on the surface of the housing (5), a rotating rod (13) is rotatably mounted on one side surface of the housing (5), a door (14) is fixedly mounted on the surface of the rotating rod (13), and a handle (15) is fixedly mounted on the surface of the door (14).

5. The ultra-high power three-phase arc furnace transformer according to claim 1, characterized in that: A mounting frame (7) is installed on the upper end of the assembly plate (6), an oil pillow (8) is fixedly installed on the upper end of the mounting frame (7), and a fixing screw (9) is riveted on one side of the mounting frame (7).

6. The ultra-high power three-phase arc furnace transformer according to claim 5, characterized in that: A fixing component (12) is fixedly mounted on the upper end of the assembly plate (6), and a receiving device (10) is fixedly mounted on the upper end of the fixing component (12).

7. The ultra-high power three-phase arc furnace transformer according to claim 1, characterized in that: An I-shaped support frame (4) is fixedly mounted on the lower surface of the box body (1), heat dissipation pipes (3) are fixedly mounted on both side surfaces of the box body (1), and heat dissipation grilles (2) are fixedly mounted on both side surfaces of the box body (1).

Images