CN217820590U - Dynamic on-line detection device for large current line impedance of electric arc furnace - Google Patents

Dynamic on-line detection device for large current line impedance of electric arc furnace Download PDF

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CN217820590U
CN217820590U CN202221575671.7U CN202221575671U CN217820590U CN 217820590 U CN217820590 U CN 217820590U CN 202221575671 U CN202221575671 U CN 202221575671U CN 217820590 U CN217820590 U CN 217820590U
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phase
transformer
arc furnace
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韩星
石秋强
李芳�
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CISDI Engineering Co Ltd
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Abstract

The utility model relates to a dynamic on-line measuring device of electric arc furnace heavy current circuit impedance belongs to the metallurgical industry field. The device comprises an outlet side three-phase voltage transformer, a Roots coil of three-phase current, a three-phase electrode voltage transformer, an integrator, a voltage converter and a computer or a PLC, wherein the outlet side three-phase voltage transformer is arranged at the outlet end of the low-voltage side of the electric arc furnace transformer, the working voltage is fed out by the detection transformer, the Roots coil of the three-phase current is sleeved outside a flexible compensator or a conductive copper pipe, the working current is fed out by the detection transformer, the working voltage of a graphite electrode is detected by the three-phase electrode voltage transformer through a stainless steel water cooling pipeline, and current and voltage signals are respectively read by the integrator and the voltage converter and then are transmitted to the computer or the PLC to calculate the impedance of a large-current line. The utility model discloses an impedance of real-time dynamic detection heavy current circuit, adjustable graphite electrode operating current and operating voltage guarantee the work electric energy stable balance of each phase circuit.

Description

电弧炉大电流线路阻抗的动态在线检测装置Dynamic On-Line Detection Device for Large Current Line Impedance of Electric Arc Furnace

技术领域technical field

本实用新型属于冶金行业领域,涉及电弧炉、精炼炉,尤其涉及一种电弧炉大电流线路阻抗的动态在线检测装置。The utility model belongs to the field of metallurgical industry, relates to an electric arc furnace and a refining furnace, in particular to a dynamic on-line detection device for large current line impedance of an electric arc furnace.

背景技术Background technique

现有的电弧炉大电流线路的阻抗,是由柔性补偿器,导电铜管,大电流水冷电缆,铜钢复合导电横臂组成。由于在冶炼生产时,石墨电极的上下移动会引起铜钢复合导电横臂的位置变化,大电流水冷电缆的摆动,在人工预估时,都是以静态计算的办法进行估算,折算的电抗大小,随着电极升降位置的移动和水冷电缆的摆动会发生变化;不能准确反映大电流线路阻抗的实际变化,仅做为冶炼参考。由于电弧炉变压器在输出端的三相电压有所差异,导致电弧炉石墨电极端的电压也有所不同。The impedance of the existing electric arc furnace high-current line is composed of a flexible compensator, a conductive copper tube, a high-current water-cooled cable, and a copper-steel composite conductive cross arm. Since during smelting and production, the up and down movement of the graphite electrode will cause the position change of the copper-steel composite conductive cross arm, and the swing of the high-current water-cooled cable is estimated manually by static calculation. The converted reactance , will change with the movement of the electrode lifting position and the swing of the water-cooled cable; it cannot accurately reflect the actual change of the impedance of the high-current line, and it is only used as a reference for smelting. Due to the difference in the three-phase voltage at the output end of the electric arc furnace transformer, the voltage at the graphite electrode end of the electric arc furnace is also different.

原来仅靠静态计算的电弧炉大电流线路的阻抗,比起动态计算的电弧炉大电流线路的阻抗,误差较大,电弧炉大电流线路的工作不平衡较大;三相大电流线路的损耗的也靠经验估算,电极调节移动的响应滞后多,导致电极输入炉内的功率不平衡,造成炉壁耐火材料侵蚀也不均匀,影响电弧炉的稳定冶炼生产。Compared with the impedance of the high-current line of the electric arc furnace calculated dynamically, the impedance of the high-current line of the electric arc furnace calculated only by static calculation has a larger error, and the work imbalance of the high-current line of the electric arc furnace is larger; the loss of the three-phase high-current line It is also estimated by experience that the response of the electrode adjustment movement lags a lot, resulting in an imbalance in the power input into the furnace by the electrode, resulting in uneven erosion of the refractory material on the furnace wall, and affecting the stable smelting production of the electric arc furnace.

实用新型内容Utility model content

有鉴于此,本实用新型的目的在于提供一种电弧炉大电流线路阻抗的动态在线检测装置为达到上述目的,本实用新型提供如下技术方案:In view of this, the purpose of this utility model is to provide a dynamic on-line detection device for electric arc furnace high current line impedance. In order to achieve the above purpose, this utility model provides the following technical solutions:

电弧炉大电流线路阻抗的动态在线检测装置,包括三相电流的罗茨线圈10、出线侧三相电压互感器11和三相电极电压互感器8;A dynamic on-line detection device for large current line impedance of an electric arc furnace, including a Roots coil 10 for three-phase current, a three-phase voltage transformer 11 on the outlet side and a three-phase electrode voltage transformer 8;

所述三相电流的罗茨线圈10套在柔性补偿器9或导电铜管2的外侧,用于检测电弧炉变压器1供电电路的馈出工作电流;The Roots coil 10 of the three-phase current is set on the outside of the flexible compensator 9 or the conductive copper tube 2, and is used to detect the feed-out working current of the electric arc furnace transformer 1 power supply circuit;

所述出线侧三相电压互感器11设置于电弧炉变压器1低压侧出线端处,用于检测电弧炉变压器1供电电路的馈出工作电压;The outlet-side three-phase voltage transformer 11 is arranged at the outlet end of the low-voltage side of the electric arc furnace transformer 1, and is used to detect the feed-out working voltage of the electric arc furnace transformer 1 power supply circuit;

所述三相电极电压互感器8通过不锈钢水冷管道7与石墨电极5的导电夹头端连接,用于检测石墨电极的工作电压。The three-phase electrode voltage transformer 8 is connected to the conductive chuck end of the graphite electrode 5 through the stainless steel water cooling pipe 7, and is used for detecting the working voltage of the graphite electrode.

优选地,电弧炉变压器1低压侧出线端处设置有接线柱,通过接线柱与出线侧三相电压互感器11连接。Preferably, a terminal is provided at the outlet end of the low-voltage side of the electric arc furnace transformer 1, and is connected to the three-phase voltage transformer 11 on the outlet side through the terminal.

优选地,所述不锈钢水冷管道7内置于铜钢复合导电横臂4中。Preferably, the stainless steel water-cooling pipeline 7 is built into the copper-steel composite conductive cross arm 4 .

优选地,该装置还包括积分器、电压变换器一和电压变换器二;所述三相电流的罗茨线圈10与积分器连接;所述出线侧三相电压互感器11与电压变换器一连接;所述三相电极电压互感器8与电压变换器二连接。Preferably, the device also includes an integrator, a voltage converter one and a voltage converter two; the Roots coil 10 of the three-phase current is connected to the integrator; the three-phase voltage transformer 11 on the outlet side is connected to the voltage converter one connection; the three-phase electrode voltage transformer 8 is connected to the second voltage converter.

优选地,该装置还包括计算机;计算机分别与积分器、电压变换器一和电压变换器二连接。Preferably, the device further includes a computer; the computer is respectively connected to the integrator, the first voltage converter and the second voltage converter.

本实用新型的有益效果在于:本实用新型可实时动态的计算电弧炉大电流线路阻抗的变化,判断三相电路不平衡度,调整石墨电极工作电流和工作电压,对提高电弧炉炉内加热功率的平衡、提高电弧炉的冶炼功率因数、减小炉体耐火材料的侵蚀、缩短电弧炉冶炼周期,具有重要指导意义。The beneficial effect of the utility model is that the utility model can dynamically calculate the change of the impedance of the large current line of the electric arc furnace in real time, judge the unbalance degree of the three-phase circuit, adjust the working current and working voltage of the graphite electrode, and improve the heating power in the electric arc furnace It has important guiding significance to improve the balance of electric arc furnace smelting power factor, reduce the erosion of furnace refractory materials, and shorten the electric arc furnace smelting cycle.

本实用新型的其他优点、目标和特征在某种程度上将在随后的说明书中进行阐述,并且在某种程度上,基于对下文的考察研究对本领域技术人员而言将是显而易见的,或者可以从本实用新型的实践中得到教导。本实用新型的目标和其他优点可以通过下面的说明书来实现和获得。Other advantages, objectives and features of the present utility model will be set forth in the following description to some extent, and to some extent, based on the investigation and research below, it will be obvious to those skilled in the art, or can be Get teaching from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained through the following description.

附图说明Description of drawings

为了使本实用新型的目的、技术方案和优点更加清楚,下面将结合附图对本实用新型作优选的详细描述,其中:In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, wherein:

图1为实施本实用新型的电弧炉示意图;Fig. 1 is the schematic diagram of implementing the electric arc furnace of the present utility model;

图2为本实用新型连接示意图。Figure 2 is a schematic diagram of the connection of the utility model.

附图标记:1-电弧炉变压器;2-导电铜管;3-大电流水冷电缆;4-铜钢复合导电横臂;5-石墨电极;6-电极前端接线柱;7-不锈钢水冷管道;8-三相电极电压互感器;9-柔性补偿器;10-三相电流的罗茨线圈;11-出线侧三相电压互感器。Reference signs: 1-electric arc furnace transformer; 2-conductive copper tube; 3-high-current water-cooled cable; 4-copper-steel composite conductive cross arm; 5-graphite electrode; 6-electrode front-end terminal; 7-stainless steel water-cooled pipe; 8-Three-phase electrode voltage transformer; 9-flexible compensator; 10-Roots coil for three-phase current; 11-three-phase voltage transformer on the outlet side.

具体实施方式Detailed ways

以下通过特定的具体实例说明本实用新型的实施方式,本领域技术人员可由本说明书所揭露的内容轻易地了解本实用新型的其他优点与功效。本实用新型还可以通过另外不同的具体实施方式加以实施或应用,本说明书中的各项细节也可以基于不同观点与应用,在没有背离本实用新型的精神下进行各种修饰或改变。需要说明的是,以下实施例中所提供的图示仅以示意方式说明本实用新型的基本构想,在不冲突的情况下,以下实施例及实施例中的特征可以相互组合。The implementation of the present utility model is described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation modes, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the illustrations provided in the following embodiments are only schematically illustrating the basic idea of the present utility model, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

其中,附图仅用于示例性说明,表示的仅是示意图,而非实物图,不能理解为对本实用新型的限制;为了更好地说明本实用新型的实施例,附图某些部件会有省略、放大或缩小,并不代表实际产品的尺寸;对本领域技术人员来说,附图中某些公知结构及其说明可能省略是可以理解的。Wherein, accompanying drawing is only for exemplary illustration, and what represent is only schematic diagram, rather than physical figure, can not be interpreted as the restriction to the utility model; In order to better illustrate the embodiment of the utility model, some parts of accompanying drawing will The omission, enlargement or reduction does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

如图1所示为实施本实用新型的电弧炉示意图,电弧炉变压器1的低压侧出线端处,设置有接线柱,通过接线柱连接出线侧三相电压互感器11,分别检测三相变压器三个供电电路的馈出工作电压;在大电流线路的柔性补偿器9和导电铜管2之间,设置三相电流的罗茨线圈10,其中罗茨线圈可以套在柔性补偿器9或者导电铜管2的外侧,并且三相安装必须同方向;导电铜管2通过大电流水冷电缆3,连接到铜钢复合导电横臂4通过铜钢复合导电横臂4的电极前端接线柱6,连接到导电夹头端,采用内置不锈钢水冷管道7的方式,将石墨电极5的三相工作电压引出来,再设置三相电极电压互感器8,分别检测三根石墨电极5的工作电压。As shown in Fig. 1, it is the electric arc furnace schematic diagram implementing the utility model, the low-voltage side outlet end of the electric arc furnace transformer 1 is provided with a terminal, and the three-phase voltage transformer 11 on the outlet side is connected through the terminal to detect the three phases of the three-phase transformer respectively. The feed-out operating voltage of a power supply circuit; between the flexible compensator 9 and the conductive copper tube 2 of the large current line, the Roots coil 10 of the three-phase current is set, wherein the Roots coil can be enclosed within the flexible compensator 9 or the conductive copper tube. The outer side of the tube 2, and the three-phase installation must be in the same direction; the conductive copper tube 2 is connected to the copper-steel composite conductive cross-arm 4 through the electrode front-end terminal 6 of the copper-steel composite conductive cross-arm 4 through the high-current water-cooled cable 3, and connected to the At the end of the conductive chuck, the three-phase working voltage of the graphite electrode 5 is drawn out by means of a built-in stainless steel water-cooling pipe 7, and then a three-phase electrode voltage transformer 8 is installed to detect the working voltage of the three graphite electrodes 5 respectively.

其中三相电极电压互感器8与电压变换器二连接、出线侧三相电压互感器11与电压变换器一连接,将两个电压互感器的电压信号转换为计算机可读取的0V~10V的电压信号,三相电流的罗茨线圈外接积分器读取罗茨线圈的电流信号,再将积分器和电压互感器的电信号传输至计算机或PLC计算大电流线路阻抗,如图2所示,并在计算机中生成曲线显示阻抗的实时变化。Among them, the three-phase electrode voltage transformer 8 is connected to the second voltage converter, and the three-phase voltage transformer 11 on the outlet side is connected to the first voltage converter, and the voltage signals of the two voltage transformers are converted into 0V-10V readable by the computer. The voltage signal, the roots coil of the three-phase current is externally connected to the integrator to read the current signal of the roots coil, and then the electrical signal of the integrator and the voltage transformer is transmitted to the computer or PLC to calculate the impedance of the large current line, as shown in Figure 2. And generate a curve in the computer to display the real-time change of impedance.

最后说明的是,以上实施例仅用以说明本实用新型的技术方案而非限制,尽管参照较佳实施例对本实用新型进行了详细说明,本领域的普通技术人员应当理解,可以对本实用新型的技术方案进行修改或者等同替换,而不脱离本技术方案的宗旨和范围,其均应涵盖在本实用新型的权利要求范围当中。Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions shall be covered by the claims of the present utility model.

Claims (5)

1. The utility model provides a dynamic on-line measuring device of electric arc furnace heavy current circuit impedance which characterized in that: the three-phase current transformer comprises a three-phase current Roots coil (10), an outlet side three-phase voltage transformer (11) and a three-phase electrode voltage transformer (8);
the three-phase current Roots coil (10) is sleeved on the outer side of the flexible compensator (9) or the conductive copper pipe (2) and used for detecting the fed working current of the power supply circuit of the electric arc furnace transformer (1);
the outgoing line side three-phase voltage transformer (11) is arranged at the outgoing line end of the low-voltage side of the electric arc furnace transformer (1) and used for detecting the fed-out working voltage of a power supply circuit of the electric arc furnace transformer (1);
and the three-phase electrode voltage transformer (8) is connected with the conductive clamping head end of the graphite electrode (5) through a stainless steel water cooling pipeline (7) and is used for detecting the working voltage of the graphite electrode.
2. The dynamic on-line detection device of the arc furnace high current line impedance of claim 1, wherein: a wiring terminal is arranged at the low-voltage side wire outlet end of the electric arc furnace transformer (1) and is connected with a wire outlet side three-phase voltage transformer (11) through the wiring terminal.
3. The dynamic on-line detection device of the arc furnace high current line impedance of claim 1, wherein: the stainless steel water-cooling pipeline (7) is arranged in the copper-steel composite conductive cross arm (4) in a built-in mode.
4. The dynamic on-line detection device of the arc furnace high current line impedance of claim 1, wherein: the device also comprises an integrator, a first voltage converter and a second voltage converter;
the three-phase current Roots coil (10) is connected with the integrator; the outgoing line side three-phase voltage transformer (11) is connected with the first voltage converter; and the three-phase voltage transformer (8) is connected with a second voltage converter.
5. The dynamic on-line detection device for the impedance of a large current line of an electric arc furnace as claimed in claim 1 or 4, wherein: the apparatus also includes a computer;
and the computer is respectively connected with the integrator, the first voltage converter and the second voltage converter.
CN202221575671.7U 2022-06-22 2022-06-22 Dynamic on-line detection device for large current line impedance of electric arc furnace Active CN217820590U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115184679A (en) * 2022-06-22 2022-10-14 中冶赛迪工程技术股份有限公司 Dynamic online detection system and method for high current line impedance of electric arc furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115184679A (en) * 2022-06-22 2022-10-14 中冶赛迪工程技术股份有限公司 Dynamic online detection system and method for high current line impedance of electric arc furnace

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