Current measuring device for arc furnace electrodes

Abstract

The present invention discloses a current measuring device for an electrode of an electric arc furnace, comprising: a current measuring unit and a current signal acquisition unit, wherein the current measuring unit comprises a cooling tube and a coil, wherein the cooling tube is hollow and has a liquid inlet and a liquid outlet that are connected, wherein at least part of the cooling tube is in an annular structure and is formed with a containing space, wherein the containing space is used to contain the electrode of the electric arc furnace, wherein the coil is wound around the cooling tube and extends around the circumferential direction of the cooling tube, wherein the current signal acquisition unit is electrically connected to the coil, and wherein the current signal acquisition unit is configured to sense the current of the electrode of the electric arc furnace through the coil. Thus, direct measurement of the current of the electrode of the electric arc furnace is realized, measurement accuracy is greatly improved, and the influence of circuit loss on the measurement current can be avoided, and when the coolant is transported into the cooling tube, the cooling circulation of the coolant in the cooling tube can be realized, which is beneficial to reducing the coil temperature and improving the measurement accuracy and service life of the current measuring device.

Description

Technical Field

[0001] The invention relates to the technical field of electric current measurement of an ore-fired furnace electrode, and in particular to a current measurement device for an ore-fired furnace electrode. Background Art

[0002] During the production process of the submerged arc furnace, it is necessary to measure the electrode current of the submerged arc furnace. The measurement accuracy of the electrode current will directly affect the temperature stability and control accuracy in the submerged arc furnace. By accurately measuring the electrode current, the operator can adjust the electrode current as needed to accurately control the furnace temperature to ensure that the ore or metal alloy in the furnace reaches the required heating temperature.

[0003] In the related technology, the current measurement of the electrode current of the electric arc furnace is usually carried out on the transformer side of the electric arc furnace. However, in the actual measurement process, since the transformer is far away from the electrode, the indirect measurement on the transformer side easily mixes the loss in the entire circuit with the electrode current. In addition, the current measured by multiple Rogowski coils on the transformer side of the electric arc furnace is processed through vector superposition, resulting in large measurement errors. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the purpose of the present invention is to propose a current measuring device for an electrode of an electric arc furnace, wherein the coil of the current measuring unit is wound around a cooling tube and extends around the circumferential direction of the electrode of the electric arc furnace, and the current signal acquisition unit is electrically connected to the coil, and the current signal acquisition unit is configured to collect the current of the electrode of the electric arc furnace, thereby realizing direct measurement of the current of the electrode of the electric arc furnace, greatly improving the measurement accuracy and avoiding the influence of circuit loss on the measurement current, and at the same time, the cooling tube is hollow and has a connected liquid inlet and liquid outlet, and when the coolant is transported into the cooling tube, the cooling circulation of the coolant in the cooling tube can be realized, which is conducive to reducing the coil temperature, ensuring that the coil works in a reasonable temperature range, and is conducive to improving the measurement accuracy and service life of the current measuring device.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention proposes a current measuring device for an electrode of an electric arc furnace, comprising: a current measuring unit, the current measuring unit comprising a cooling tube and a coil, the cooling tube being hollow and having a connected liquid inlet and a liquid outlet, at least a portion of the cooling tube being in an annular structure and forming an accommodating space, the accommodating space being used to accommodate the electrode of the electric arc furnace, the coil being wound around the cooling tube and extending around in a circumferential direction of the cooling tube; a current signal acquisition unit, the current signal acquisition unit being electrically connected to the coil, and the current signal acquisition unit being configured to sense the current of the electrode of the electric arc furnace through the coil.

[0006] According to the current measuring device for the electrode of the ore-heating furnace according to the embodiment of the present invention, the coil of the current measuring unit is wound around the cooling tube and extends around the circumferential direction of the electrode of the ore-heating furnace, the current signal acquisition unit is electrically connected to the coil, and the current signal acquisition unit is configured to collect the current of the electrode of the ore-heating furnace, thereby realizing direct measurement of the current of the electrode of the ore-heating furnace, greatly improving the measurement accuracy and avoiding the influence of circuit loss on the measured current. At the same time, the cooling tube is hollow and has a connected liquid inlet and liquid outlet. When the coolant is transported to the cooling tube, the cooling circulation of the coolant in the cooling tube can be realized, which is beneficial to reducing the coil temperature, ensuring that the coil works within a reasonable temperature range, and is beneficial to improving the measurement accuracy and service life of the current measuring device.

[0007] According to one embodiment of the present invention, it further comprises: a shielding box, the shielding box is in an annular structure, and the coil and a portion of the cooling pipe in the annular structure are both arranged in the shielding box;

[0008] The shielding box is also provided with a through hole extending along the circumferential direction of the shielding box, the opening of the through hole faces the accommodating space, and the coil is suitable for generating an induced current with the electrode of the ore-fired furnace through the through hole.

[0009] According to one embodiment of the present invention, the current measuring unit includes a plurality of sub-current measuring units, each of which includes a sub-cooling tube and a sub-coil wound on the sub-cooling tube, wherein the plurality of sub-cooling tubes are sequentially spliced ​​and connected to form a cooling tube, and one or two of the plurality of sub-cooling tubes are respectively provided with a liquid inlet or a liquid outlet;

[0010] A current signal acquisition unit is electrically connected between any two adjacent sub-coils among the multiple sub-coils, and the remaining two adjacent sub-coils among the multiple sub-coils are electrically connected in series in sequence along the circumferential direction of the cooling tube.

[0011] According to one embodiment of the present invention, the shielding box includes a plurality of sub-shielding boxes spliced ​​around the circumferential direction of the shielding box, the plurality of sub-shielding boxes correspond one-to-one to the plurality of sub-current measuring units, and the sub-coil and the sub-cooling tube of each sub-current measuring unit are arranged in the corresponding sub-shielding box;

[0012] Each sub-shielding box is provided with a sub-through hole, and a plurality of sub-through holes are sequentially arranged around the circumferential direction of the shielding box to form a through hole.

[0013] According to an embodiment of the present invention, the number of turns of the sub-coils in each sub-current measurement unit is the same.

[0014] According to an embodiment of the present invention, the size of the sub-cooling pipe in each sub-current measurement unit is adjustable.

[0015] According to one embodiment of the present invention, it also includes: a cooling tank, a plurality of sub-cooling tanks and a controller, wherein the plurality of sub-cooling tanks and the cooling tank all store cooling liquid, and the controller is configured to control one or more of the plurality of sub-cooling tanks and the cooling tank to deliver cooling liquid to the liquid inlet according to the current of the current acquisition unit and the temperature of the cooling liquid in the cooling pipe.

[0016] According to an embodiment of the present invention, a plurality of sub-cooling slots are all connected to the cooling slot, and the coolant in the cooling slot is suitable for flowing into the corresponding sub-cooling slots.

[0017] According to one embodiment of the present invention, a liquid level sensor is provided in each sub-cooling tank, and the liquid level sensor is configured to detect the liquid level height of the coolant in the sub-cooling tank;

[0018] The controller is used to control the multiple sub-cooling slots to deliver coolant to the liquid inlet in sequence, and is configured to control the next sub-cooling slot to deliver coolant to the liquid inlet when the liquid level height of the current sub-cooling slot reaches the lower limit of the liquid level.

[0019] According to one embodiment of the present invention, the multiple sub-cooling slots include a first sub-cooling slot, a second sub-cooling slot and a third sub-cooling slot, and the multiple cooling modules include an air cooling module, a water cooling module and an air conditioning cooling module. The air cooling module is suitable for cooling the coolant in the first sub-cooling slot, the water cooling module is suitable for cooling the coolant in the second sub-cooling slot, and the air conditioning cooling module is suitable for cooling the coolant in the third sub-cooling slot.

[0020] According to one embodiment of the present invention, the temperatures of the coolants in the plurality of sub-cooling slots are different, and the controller is configured to control the corresponding sub-cooling slots to deliver the coolant to the liquid inlet in sequence according to the temperature of the coolant from high temperature to low temperature.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a current measuring device and an electrode of an electric arc furnace according to a first embodiment of the present invention;

[0023] Figure 2 A schematic diagram of an electrode of a mineral arc furnace of a current measuring device according to a second embodiment of the present invention;

[0024] Figure 3 A schematic diagram of an electrode of a mineral arc furnace of a current measuring device according to a third embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of a sub-current measurement unit and a sub-shielding box according to an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of a current measuring device and an electrode of an ore-fired furnace according to a fourth embodiment of the present invention.

[0027] Reference numerals:

[0028] Current measuring device 100;

[0029] Current measuring unit 1; cooling tube 11; liquid inlet 111; liquid outlet 112; coil 12; sub-current measuring unit 13; sub-cooling tube 131; sub-coil 132;

[0030] Current signal acquisition unit 2;

[0031] Shielding box 3; through hole 31; sub-shielding box 32; sub-through hole 321;

[0032] Cooling tank 4; first sub-cooling tank 5; second sub-cooling tank 6; third sub-cooling tank 7; liquid level sensor 8;

[0033] Submerged arc furnace electrode 200. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The current measuring device 100 for an electrode 200 of an ore-bearing furnace according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0036] like Figure 1-Figure 5 As shown, a current measuring device 100 for an electrode 200 of an electric arc furnace according to an embodiment of the present invention includes: a current measuring unit 1 and a current signal acquisition unit 2. The current measuring unit 1 includes a cooling tube 11 and a coil 12. The cooling tube 11 is hollow and has a liquid inlet 111 and a liquid outlet 112 that are connected. At least part of the cooling tube 11 is annular and forms an accommodating space. The accommodating space is used to accommodate the electrode 200 of the electric arc furnace. The coil 12 is wound around the cooling tube 11 and extends around the circumferential direction of the cooling tube 11. The current signal acquisition unit 2 is electrically connected to the coil 12. The current signal acquisition unit 2 is configured to sense the current of the electrode 200 of the electric arc furnace through the coil 12.

[0037] It should be noted that during the production process of the electric arc furnace, it is necessary to measure the current of the electric arc furnace electrode 200, and the measurement accuracy of the electrode current will directly affect the temperature stability and control accuracy in the electric arc furnace. By accurately measuring the electrode current, the operator can adjust the electrode current as needed to accurately control the furnace temperature to ensure that the ore or metal alloy in the furnace reaches the required heating temperature.

[0038] In the related art, the current measurement of the electrode 200 of the electric arc furnace is usually located on the transformer side of the electric arc furnace. However, in the actual measurement process, since the transformer is far away from the electrode, the indirect measurement on the transformer side easily mixes the loss in the entire circuit with the electrode current, and the current measured by multiple Rogowski coils on the transformer side of the electric arc furnace is processed through vector superposition, resulting in large measurement errors.

[0039] Based on this, Figure 1-Figure 3 As shown, in some embodiments of the present invention, a cooling tube 11 having at least a partial annular structure and a coil 12 wound around the cooling tube 11 and extending around the circumferential direction of the ore-heating furnace electrode 200 are respectively provided, wherein the cooling tube 11 having an annular structure forms a accommodating space, the accommodating space is cylindrical, the ore-heating furnace electrode 200 is passed through the accommodating space from top to bottom and is separated from the cooling tube 11, so that the coil 12 is directly arranged around the ore-heating furnace electrode 200, when the electrode current is measured, the coil 12 can generate an induced voltage with the ore-heating furnace electrode 200, further, the coil 12 is electrically connected to the current signal acquisition unit 2, and the current signal acquisition unit 2 obtains the current of the ore-heating furnace electrode 200 according to the induced voltage generated by the coil 12, that is, the current of the ore-heating furnace electrode 200 can be directly measured by the coordinated use of the current signal acquisition unit 2 and the coil 12, which greatly improves the measurement accuracy compared with the traditional indirect measurement method on the transformer side, and the measured current is only the electrode current, avoiding the influence of circuit loss on the measured current.

[0040] It is understandable that when the coil 12 is used to directly measure the current of the electrode 200 of the electric arc furnace, the magnitude of the current of the electrode 200 of the electric arc furnace directly affects the change of the ambient temperature. When the electrode current suddenly increases, the temperature around the electrode 200 of the electric arc furnace rises rapidly, which can easily cause the temperature of the coil 12 to be too high, thereby affecting the measurement accuracy and the service life of the current measuring device 100. Therefore, when directly measuring the current of the electrode 200 of the electric arc furnace, the cooling of the device needs to be considered.

[0041] In some embodiments of the present invention, the cooling tube 11 is hollow and is provided with a liquid inlet 111 and a liquid outlet 112. Optionally, the cooling tube 11 can be made of non-ferromagnetic material, such as a stainless steel tube, etc. At least a portion of the cooling tube 11 surrounds the ore-heating furnace electrode 200 along the circumferential direction of the ore-heating furnace electrode 200, thereby providing support for the coil 12 to be installed around the circumferential direction of the ore-heating furnace electrode 200. The coil 12 can be directly wound around the cooling tube 11 to ensure direct contact between the coil 12 and the cooling tube 11. With this arrangement, when the current of the ore-heating furnace electrode 200 is too large and the coil 12 needs to be cooled, the coolant can be continuously delivered to the liquid inlet 111 of the cooling tube 11, such as Figure 1 and Figure 2 As shown, the coolant flowing into the cooling tube 11 eventually flows out from the liquid outlet 112, thereby realizing the cooling circulation of the coolant in the cooling tube 11, and the coil 12 can exchange heat with the coolant in the cooling tube 11, thereby realizing the cooling of the coil 12. With such an arrangement, when the coil 12 works at a relatively high stability, the coolant circulating in the cooling tube 11 can reduce the temperature of the coil 12, thereby ensuring that the coil 12 works within a reasonable temperature range, which is beneficial to improving the measurement accuracy and service life of the current measuring device 100.

[0042] According to the current measuring device 100 for the electrode 200 of the electric arc furnace of the embodiment of the present invention, the coil 12 of the current measuring unit 1 is wound around the cooling tube 11 and extends around the circumferential direction of the electrode 200 of the electric arc furnace, and the current signal acquisition unit 2 is electrically connected to the coil 12. The current signal acquisition unit 2 is configured to collect the current of the electrode 200 of the electric arc furnace, thereby realizing the direct measurement of the current of the electrode 200 of the electric arc furnace, greatly improving the measurement accuracy and avoiding the influence of circuit loss on the measurement current. At the same time, the cooling tube 11 is hollow and has a connected liquid inlet 111 and a liquid outlet 112. When the coolant is transported into the cooling tube 11, the cooling circulation of the coolant in the cooling tube 11 can be realized, which is beneficial to reducing the temperature of the coil 12, ensuring that the coil 12 works within a reasonable temperature range, and is beneficial to improving the measurement accuracy and service life of the current measuring device 100.

[0043] In some embodiments of the present invention, Figure 1-Figure 3 As shown, it also includes: a shielding box 3, the shielding box 3 is annular in structure, and the coil 12 and a part of the cooling tube 11 in the annular structure are both arranged in the shielding box 3, the shielding box 3 is also provided with a through hole 31 extending along the circumferential direction of the shielding box 3, and the coil 12 is suitable for generating an induced current with the electrode 200 of the electric arc furnace through the through hole 31.

[0044] Specifically, in order to reduce external electromagnetic interference, the current measuring device 100 further includes a shielding box 3, which is made of silicon steel material and is constructed as a ring box. Figure 3As shown, the shielding box 3 surrounds the cooling tube 11 in the circumferential direction and is separated from the ore-forming furnace electrode 200. The coil 12 and the ring-shaped portion of the cooling tube 11 are both arranged in the shielding box 3. This arrangement reduces the interference of other ore-forming furnace electrodes 200 on the current measuring device 100 corresponding to the current ore-forming furnace electrode 200.

[0045] Furthermore, in order to enable the current measuring unit 1 to better sense the current signal of the electric arc furnace electrode 200, a through hole 31 is opened on the inner side of the shielding box 3, and the opening of the through hole 31 faces the accommodating space, that is, the through hole 31 is arranged opposite to the electric arc furnace electrode 200, and the through hole 31 extends along the circumferential direction of the shielding box 3. Such an arrangement ensures that the magnetic lines of force generated by the main magnetic flux of the current of the electric arc furnace electrode 200 to be measured can generate an induced voltage with the coil 12 in the shielding box 3. In other words, it not only shields external electromagnetic interference, but also meets the normal measurement requirements of the electric arc furnace electrode 200 to be measured.

[0046] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the current measuring unit 1 includes a plurality of sub-current measuring units 13 .

[0047] Among them, Figure 4 As shown, each sub-current measurement unit 13 includes a sub-cooling tube 131 and a sub-coil 132 wound on the sub-cooling tube 131. It can be understood that the sub-cooling tube 131 can be constructed as an arc-shaped pipeline, and the sub-coil 132 is wound on the arc-shaped pipeline and extends along the circumferential direction of the arc-shaped pipeline. Further, a plurality of sub-cooling tubes 131 are spliced ​​and connected in sequence to form a cooling tube 11, that is, a plurality of arc-shaped sub-cooling tubes 131 are spliced ​​and connected in sequence to form a cooling tube 11 with an annular structure, so as to ensure that the coolant can flow through each sub-cooling tube 131 in sequence.

[0048] Furthermore, one or two of the plurality of sub-cooling tubes 131 are respectively provided with a liquid inlet 111 or a liquid outlet 112. It can be understood that Figure 1 and Figure 2 As shown, the liquid inlet 111 and the liquid outlet 112 can be arranged on the same sub-cooling tube 131, and the liquid inlet 111 and the liquid outlet 112 can also be respectively arranged on two different sub-cooling tubes 131, of course, they can also be respectively arranged on three different sub-cooling tubes 131, two of which are provided with liquid inlets 111, and the other sub-cooling tube 131 is provided with liquid outlet 112, or two of which are provided with liquid outlet 112, and the other sub-cooling tube 131 is provided with liquid inlet 111. The specific arrangement is based on actual needs, and examples are not given one by one here.

[0049] Further, any two adjacent sub-coils 132 among the plurality of sub-coils 132 are electrically connected to the current signal acquisition unit 2, and the remaining two adjacent sub-coils 132 among the plurality of sub-coils 132 are electrically connected in series in sequence along the circumferential direction of the cooling tube 11. For example, assuming that the current measurement unit 1 includes 12 sub-current measurement units 13, the 12 sub-cooling tubes 131 are respectively wound with sub-coils 132, wherein, except for two sub-coils 132 among the 12 sub-coils 132 electrically connected to the current signal acquisition unit 2, which are not connected in series, the other sub-coils 132 are sequentially connected end to end in series along the circumferential direction surrounding the ore-forming furnace electrode 200. In this way, coils 12 of different diameters can be formed by different numbers of sub-coils 132, so that the coils 12 can match and be applicable to ore-forming furnace electrodes 200 of different sizes, which is conducive to improving the overall versatility of the current measurement unit 1.

[0050] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the shielding box 3 includes a plurality of sub-shielding boxes 32 spliced ​​around the circumferential direction of the shielding box 3, the plurality of sub-shielding boxes 32 correspond one-to-one to the plurality of sub-current measuring units 13, and the sub-coil 132 and the sub-cooling tube 131 of each sub-current measuring unit 13 are arranged in the corresponding sub-shielding box, each sub-shielding box 32 is provided with a sub-through hole 321, and the plurality of sub-through holes 321 are sequentially arranged around the circumferential direction of the shielding box 3 to form a through hole 31.

[0051] That is to say, the shielding box 3 can be composed of sub-shielding boxes 32 spliced ​​around the circumferential direction of the shielding box 3, wherein each sub-current measuring unit 13 is correspondingly provided with a sub-shielding box 32, and the sub-coil 132 and the sub-cooling pipe 131 of each sub-current measuring unit 13 are both arranged in the corresponding sub-shielding box 32. Further, as Figure 4 As shown, a sub-through hole 321 is opened on the inner side of each sub-shielding box 32, and the sub-through hole 321 extends along the circumferential direction of the sub-shielding box 32. When multiple sub-shielding boxes 32 are spliced ​​around the circumferential direction of the shielding box 3, multiple sub-through holes 321 are sequentially spliced ​​into through holes 31 arranged around the circumferential direction of the shielding box 3. With this arrangement, the sub-shielding box 32 can be used in conjunction with the sub-current measuring unit 13 to meet the shielding requirements of arc furnace electrodes 200 of different sizes, which is conducive to further improving the overall versatility of the current measuring unit 1.

[0052] In some embodiments of the present invention, the number of turns of the sub-coils 132 in each sub-current measuring unit 13 is the same. In other words, the number of turns of the sub-coils 132 in each sub-current measuring unit 13 is exactly the same, so that when multiple sub-coils 132 are flexibly spliced, the consistency of the magnetic flux obtained by the sub-coils 132 can be ensured, which is conducive to further improving the current measurement accuracy.

[0053] In some embodiments of the present invention, the size of the sub-cooling tube 131 of each sub-current measuring unit 13 is adjustable. That is, by providing the sub-cooling tube 131 with adjustable size, cooling tubes 11 of different sizes can be formed, so that the sub-cooling tube 131 of different diameters can be used for the electric arc furnace electrodes 200, thereby improving the versatility of the current measuring unit 1.

[0054] In some embodiments of the present invention, it also includes: a cooling tank 4, multiple sub-cooling tanks and a controller, wherein the multiple sub-cooling tanks and the cooling tank 4 store cooling liquid, and the controller is configured to control one or more of the multiple sub-cooling tanks and the cooling tank 4 to transport cooling liquid to the liquid inlet according to the current of the current acquisition unit 2 and the temperature of the coolant in the cooling tube 11. It should be noted that the liquid outlet 112 of the cooling tube 11 can be connected to the cooling tank 4 or to other sub-cooling tanks, thereby forming a complete cooling cycle loop.

[0055] Specifically, a plurality of sub-cooling slots including a first sub-cooling slot 5, a second sub-cooling slot 6 and a third sub-cooling slot 7 are taken as an example for explanation, wherein the first sub-cooling slot 5, the second sub-cooling slot 6, the third sub-cooling slot 7 and the cooling slot 4 all store coolant. For example, the coolant in the cooling slot 4 can be at room temperature, and the first sub-cooling slot 5, the second sub-cooling slot 6 and the third sub-cooling slot 7 are respectively provided with cooling modules, and each cooling module cools down the coolant in the corresponding sub-cooling slot.

[0056] It can be understood that the current of the electrode 200 of the electric arc furnace is the main factor affecting the ambient temperature. Therefore, in the present application, the controller is configured to selectively control one or more of the multiple sub-cooling slots and the cooling slot 4 to supply coolant to the cooling pipe 11 according to the current of the current acquisition unit 2 and the temperature of the coolant in the cooling pipe 11. For example, when the current of the electrode 200 of the electric arc furnace is continuously large or increases instantaneously, the temperature of the coolant in the cooling pipe 11 increases, and the cooling slot 4 is controlled to supply coolant to the cooling pipe 11 as needed, or the first sub-cooling slot 5 is controlled to supply coolant to the cooling pipe 11, or the second sub-cooling slot 6 is controlled to supply coolant to the cooling pipe 11, or the third sub-cooling slot 7 is controlled to supply coolant to the cooling pipe 11, or the cooling slot 4 and the first sub-cooling slot 5 are controlled to supply coolant to the cooling pipe 11, or the cooling slot 4 and the second sub-cooling slot 6 are controlled to supply coolant to the cooling pipe 11, or the cooling slot 4 and the first sub-cooling slot 5 are controlled to supply coolant to the cooling pipe 11, The three sub-cooling slots 7 supply coolant to the cooling pipe 11, or control the cooling slot 4, the first sub-cooling slot 5 and the second sub-cooling slot 6 to supply coolant to the cooling pipe 11, or control the cooling slot 4, the first sub-cooling slot 5 and the second sub-cooling slot 6 to supply coolant to the cooling pipe 11, or control the cooling slot 4, the first sub-cooling slot 5 and the third sub-cooling slot 7 to supply coolant to the cooling pipe 11, or control the cooling slot 4, the second sub-cooling slot 6 and the third sub-cooling slot 7 to supply coolant to the cooling pipe 11, or control the cooling slot 4, the first sub-cooling slot 5, the second sub-cooling slot 6 and the third sub-cooling slot 7 to supply coolant to the cooling pipe 11. In general, the longer the current lasts or the greater the instantaneous increase, the higher the ambient temperature around the coil. The cooling slot and a larger number of sub-cooling slots can be controlled accordingly to cool down the cooling pipe, thereby improving the cooling capacity of the coolant in the cooling pipe. The specific selection is based on actual needs and is not specifically limited here.

[0057] Therefore, according to the current of the electric arc furnace electrode 200, one or more of the plurality of sub-cooling slots and the cooling slot 4 are controlled to deliver cooling liquid to the liquid inlet, which can be flexibly adjusted while meeting the cooling demand, and has strong applicability.

[0058] It should be noted that since the current of the electric arc furnace electrode 200 ultimately affects the ambient temperature around the coil, the controller can also be configured to selectively control one or more of the multiple sub-cooling slots and the cooling slot 4 to deliver coolant to the cooling pipe 11 according to the ambient temperature around the coil. The specific control method is referred to above and will not be repeated here.

[0059] In some embodiments of the present invention, a plurality of sub-cooling slots are all connected to the cooling slot 4, and the coolant in the cooling slot 4 is suitable for flowing into the corresponding sub-cooling slots.

[0060] Specifically, the following description will be given by taking a plurality of sub-cooling slots including a first sub-cooling slot 5, a second sub-cooling slot 6 and a third sub-cooling slot 7 as an example, wherein the cooling slot 4 is connected to the liquid outlet 112 of the cooling pipe 11 through a reflux pipeline, a first pipeline is connected between the first sub-cooling slot 5 and the cooling slot 4, and a first switch valve is provided in the first pipeline, when the first switch valve is opened, the coolant in the cooling slot 4 flows into the first sub-cooling slot 5 through the first pipeline, similarly, a second pipeline is connected between the second sub-cooling slot 6 and the cooling slot 4, and a second switch valve is provided in the second pipeline, when the second switch valve is opened, the coolant in the cooling slot 4 flows into the second sub-cooling slot 6 through the second pipeline, the third sub-cooling slot 7 is connected to the cooling slot 4 through a third pipeline, and a third switch valve is provided in the third pipeline, when the third switch valve is opened, the coolant in the cooling slot 4 flows into the third sub-cooling slot 7 through the third pipeline.

[0061] Further, the first sub-cooling groove 5 is connected to the liquid inlet 111 of the cooling pipe 11 by a fourth pipeline, and a fourth switch valve is provided in the fourth pipeline. When the fourth switch valve is opened, the coolant in the first sub-cooling groove 5 flows into the cooling pipe 11 through the fourth pipeline. Similarly, the second sub-cooling groove 6 is connected to the liquid inlet 111 of the cooling pipe 11 by a fifth pipeline, and a fifth switch valve is provided in the fifth pipeline. When the fifth switch valve is opened, the coolant in the second sub-cooling groove 6 flows into the cooling pipe 11 through the fifth pipeline. The third sub-cooling groove 7 is connected to the liquid inlet 111 of the cooling pipe 11 by a sixth pipeline, and the sixth switch valve is provided in the fifth pipeline. A sixth switch valve is provided in the pipeline. When the sixth switch valve is opened, the coolant in the third sub-cooling groove 7 flows into the cooling pipe 11 through the sixth pipeline. The cooling groove 4 is connected to the liquid outlet 112 of the cooling pipe 11 by a seventh pipeline, and a seventh switch valve is provided in the seventh pipeline. When the seventh switch valve is opened, the coolant in the cooling pipe 11 flows into the cooling groove 4 through the seventh pipeline. Optionally, the cooling groove 4 is connected to the liquid inlet 111 of the cooling pipe 11 by an eighth pipeline, and an eighth switch valve is provided in the eighth pipeline. When the eighth switch valve is opened, the coolant in the cooling groove 4 flows into the cooling pipe 11 through the eighth pipeline.

[0062] Further, as a specific example, when the current of the electric furnace electrode 200 is normal and the ambient temperature around the coil 12 is in a normal state, the seventh switch valve and the eighth switch valve are opened, and the remaining switch valves are closed, and the cooling tank 4 is switched to perform conventional cooling on the coil 12.

[0063] Furthermore, when the current of the electrode 200 of the electric furnace is slightly higher than the normal value, the fourth switch valve, the seventh switch valve and the eighth switch valve are opened, and the other switch valves are closed, and the coolant in the first sub-cooling groove 5 and the cooling groove 4 flows into the cooling pipe 11, and the coolant in the cooling pipe 11 flows back into the cooling groove 4 from the liquid outlet 112 after exchanging heat with the coil 12, thereby realizing the overall cooling cycle of the cooling pipe 11, and when the current of the electrode 200 of the electric furnace continues to increase, the fifth switch valve, the fourth switch valve, the seventh switch valve and the eighth switch valve are opened, and the other switch valves are closed, and the coolant in the first sub-cooling groove 5, the second sub-cooling groove 6 and the cooling groove 4 flows into the cooling pipe 11, and the coolant in the cooling pipe 11 flows back into the cooling groove 4 from the liquid outlet 112 after exchanging heat with the coil 12, thereby realizing the overall cooling cycle of the cooling pipe 11. After being heated, the coolant flows back into the cooling tank 4 from the liquid outlet 112, thereby realizing the overall cooling cycle of the cooling tube 11. When the current of the electrode 200 of the electric furnace is further increased, the sixth switch valve, the fifth switch valve, the fourth switch valve, the seventh switch valve and the eighth switch valve are opened, and the other switch valves are closed. The coolant in the first sub-cooling tank 5, the second sub-cooling tank 6, the third sub-cooling tank 7 and the cooling tank 4 flows into the cooling tube 11. The coolant in the cooling tube 11 flows back into the cooling tank 4 from the liquid outlet 112 after heat exchange with the coil 12, thereby realizing the overall cooling cycle of the cooling tube 11. In this way, the cooling can be flexibly adjusted according to the current of the electrode 200 of the electric furnace, and the sudden change temperature of the coil 12 can be quickly and effectively reduced.

[0064] It should be noted that the cooling liquid can also be delivered to the liquid inlet 111 of the cooling pipe 11 from one of the multiple sub-cooling slots and the cooling slot 4 as needed. The specific selection is based on actual needs and is not specifically limited here.

[0065] In some embodiments of the present invention, a liquid level sensor 8 is provided in each sub-cooling groove, and the liquid level sensor 8 is configured to detect the liquid level height of the coolant in the sub-cooling groove. The controller is used to control multiple sub-cooling grooves to sequentially deliver coolant to the liquid inlet 111, and is configured to control the next sub-cooling groove to deliver coolant to the liquid inlet when the liquid level height of the current sub-cooling groove reaches the lower limit of the liquid level.

[0066] Specifically, continuing to explain by taking multiple sub-cooling slots including a first sub-cooling slot 5, a second sub-cooling slot 6 and a third sub-cooling slot 7 as an example, a liquid level sensor 8 is provided in each of the first sub-cooling slot 5, the second sub-cooling slot 6 and the third sub-cooling slot 7. The liquid level sensor 8 is configured to detect the liquid level height of the coolant in each sub-cooling slot. It can be understood that the liquid level sensor 8 can detect the upper and lower limits of the liquid level of the coolant in each sub-cooling slot.

[0067] Furthermore, the controller is used to control the first sub-cooling groove 5, the second sub-cooling groove 6 and the third sub-cooling groove 7 to convey coolant to the liquid inlet 111 in sequence. As a specific example, the fourth switch valve and the seventh switch valve are opened to convey coolant to the cooling pipe 11 for cooling through the coolant in the first sub-cooling groove 5. The liquid level sensor 8 in the first sub-cooling groove 5 is used for the liquid level height of the coolant in the first sub-cooling groove 5. If it is detected that the liquid level height reaches the lower limit of the liquid level of the coolant in the first sub-cooling groove 5, the fifth switch valve is opened, and the coolant is conveyed to the cooling pipe 11 for cooling through the coolant in the second sub-cooling groove 6. At the same time, the fourth switch valve is closed and the first switch valve is opened, and the cooling groove 4 starts to replenish the coolant to the first sub-cooling groove 5. When the liquid level sensor 8 monitors that the coolant in the first sub-cooling groove 5 reaches the upper limit of the liquid level, the first switch valve is closed, thereby completing the replenishment of coolant to the first sub-cooling groove 5.

[0068] The liquid level sensor 8 in the second sub-cooling groove 6 is used to detect whether the liquid level reaches the lower limit of the liquid level of the coolant in the second sub-cooling groove 6. If the liquid level sensor 8 monitors that the coolant in the second sub-cooling groove 6 reaches the lower limit of the liquid level, the sixth switch valve opens, and the coolant in the third sub-cooling groove 7 is used to transport the coolant to the cooling pipe 11 for cooling. At the same time, the fifth switch valve is closed and the second switch valve is opened, and the cooling groove 4 starts to replenish the coolant to the second sub-cooling groove 6. When the liquid level sensor 8 monitors that the coolant in the second sub-cooling groove 6 reaches the upper limit of the liquid level, the second switch valve is closed, and the replenishment of the coolant in the second sub-cooling groove 6 is completed.

[0069] The liquid level sensor 8 in the third sub-cooling groove 7 is used to detect whether the liquid level has reached the lower limit of the liquid level of the coolant in the third sub-cooling groove 7. If the liquid level sensor 8 monitors that the coolant in the third sub-cooling groove 7 has reached the lower limit of the liquid level, the fourth switch valve is opened, and the coolant in the first sub-cooling groove 5 is transported to the cooling pipe 11 for cooling. At the same time, the sixth switch valve is closed and the third switch valve is opened, and the cooling groove 4 starts to replenish the coolant to the third sub-cooling groove 7. When the liquid level sensor 8 monitors that the coolant in the third sub-cooling groove 7 has reached the upper limit of the liquid level, the third switch valve is closed, and the replenishment of the coolant in the third sub-cooling groove 7 is completed.

[0070] In this way, by providing the liquid level sensor 8, the coolant in the corresponding sub-cooling tank can be replenished in time.

[0071] In some embodiments of the present invention, the multiple sub-cooling slots include a first sub-cooling slot, a second sub-cooling slot and a third sub-cooling slot, and the multiple cooling modules include an air cooling module, a water cooling module and an air conditioning cooling module. The air cooling module is suitable for cooling the coolant in the first sub-cooling slot, the water cooling module is suitable for cooling the coolant in the second sub-cooling slot, and the air conditioning cooling module is suitable for cooling the coolant in the third sub-cooling slot.

[0072] Specifically, continuing to explain by taking multiple sub-cooling slots including the first sub-cooling slot 5, the second sub-cooling slot 6 and the third sub-cooling slot 7 as an example, it can be understood that the first sub-cooling slot 5, the second sub-cooling slot 6 and the third sub-cooling slot 7 are cooled by different cooling modules so that the temperatures of the coolants in the first sub-cooling slot 5, the second sub-cooling slot 6 and the third sub-cooling slot 7 are all different. For example, the coolant in the first sub-cooling slot 5 is cooled by an air cooling module, the coolant in the second sub-cooling slot 6 is cooled by a water cooling module, and the coolant in the third sub-cooling slot 7 is cooled by an air conditioning cooling module. In this way, the temperatures of the coolants in the first sub-cooling slot 5, the second sub-cooling slot 6 and the third sub-cooling slot 7 are reduced successively, so that coolants with different cooling temperatures can be formed to meet different cooling needs.

[0073] In some embodiments of the present invention, the temperatures of the coolant in the multiple sub-cooling slots are different, and the controller is configured to control the corresponding sub-cooling slots to deliver the coolant to the liquid inlet in sequence according to the temperature of the coolant from high temperature to low temperature.

[0074] Specifically, the following description continues with the example of a plurality of sub-cooling slots including a first sub-cooling slot 5, a second sub-cooling slot 6 and a third sub-cooling slot 7, wherein the temperatures of the coolants in the first sub-cooling slot 5, the second sub-cooling slot 6 and the third sub-cooling slot 7 decrease sequentially.

[0075] Furthermore, as a specific example, when the coil 12 needs to be cooled, the coolant in the first sub-cooling groove 5 is first controlled to flow into the cooling pipe 11. When the liquid level of the coolant in the first sub-cooling groove 5 reaches the lower limit of the liquid level, the first sub-cooling groove 5 is controlled to stop supplying coolant to the cooling pipe 11, and the coolant in the second sub-cooling groove 6 is controlled to flow into the cooling pipe 11. When the liquid level of the coolant in the second sub-cooling groove 6 reaches the lower limit of the liquid level, the second sub-cooling groove 6 is controlled to stop supplying coolant to the cooling pipe 11, and the coolant in the third sub-cooling groove 7 is controlled to flow into the cooling pipe 11. When the liquid level of the coolant in the third sub-cooling groove 7 reaches the lower limit of the liquid level, the third sub-cooling groove 7 is controlled to stop supplying coolant to the cooling pipe 11. In this way, the corresponding sub-cooling grooves are controlled to supply coolant to the liquid inlet in sequence from high temperature to low temperature.

[0076] It should be noted that when the coolant in the first sub-cooling tank 5, the second sub-cooling tank 6 and the third sub-cooling tank 7 reaches the respective lower liquid level limits, the first switch valve, the second switch valve and the third switch valve are controlled to open, and the fourth switch valve, the fifth switch valve and the sixth switch valve are closed, so that the first sub-cooling tank 5, the second sub-cooling tank 6 and the third sub-cooling tank 7 start to replenish water. Until the upper liquid level limit is reached, the first switch valve, the second switch valve and the third switch valve are closed, and the air cooling module, the water cooling module and the air conditioning cooling module start to cool down the coolant in the first sub-cooling tank 5, the second sub-cooling tank 6 and the third sub-cooling tank 7 respectively, in preparation for the next use.

[0077] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0078] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A current measuring device for an electrode of an electric arc furnace, characterized in that: include: A current measuring unit, the current measuring unit comprising a cooling tube and a coil, the cooling tube being hollow and having a liquid inlet and a liquid outlet connected, at least a portion of the cooling tube being annular and forming an accommodation space, the accommodation space being used to accommodate the electric arc furnace electrode, the coil being wound around the cooling tube and extending around the cooling tube in a circumferential direction; A current signal acquisition unit is electrically connected to the coil, and is configured to sense the current of the electrode of the ore-generating furnace through the coil.

2. The current measuring device for an electrode of an electric arc furnace according to claim 1, characterized in that: Also includes: A shielding box, wherein the shielding box is in an annular structure, and the coil and the portion of the cooling pipe in the annular structure are both arranged in the shielding box; The shielding box is further provided with a through hole extending along the circumferential direction of the shielding box, the opening of the through hole faces the accommodating space, and the coil is suitable for generating an induced current with the electrode of the ore-fired furnace through the through hole.

3. The current measuring device for an electrode of an electric arc furnace according to claim 2, characterized in that: The current measuring unit comprises a plurality of sub-current measuring units, each of which comprises a sub-cooling tube and a sub-coil wound on the sub-cooling tube, wherein the plurality of sub-cooling tubes are sequentially spliced ​​and connected to form the cooling tube, and one or two of the plurality of sub-cooling tubes are respectively provided with the liquid inlet or the liquid outlet; The current signal acquisition unit is electrically connected between any two adjacent sub-coils among the plurality of sub-coils, and the remaining two adjacent sub-coils among the plurality of sub-coils are electrically connected in series in sequence along the circumferential direction of the cooling tube.

4. The current measuring device for an electrode of an electric arc furnace according to claim 3, characterized in that: The shielding box comprises a plurality of sub-shielding boxes connected around the shielding box in a circumferential direction, the plurality of sub-shielding boxes correspond to the plurality of sub-current measuring units one by one, and the sub-coil and the sub-cooling tube of each sub-current measuring unit are arranged in the corresponding sub-shielding box; Each of the sub-shielding boxes is provided with a sub-through hole, and a plurality of the sub-through holes are sequentially arranged around the circumference of the shielding box to form the through hole.

5. The current measuring device for an electrode of an electric arc furnace according to claim 3, characterized in that: The number of turns of the sub-coil in each of the sub-current measurement units is the same.

6. The current measuring device for an electrode of an electric arc furnace according to claim 3, characterized in that: The size of the sub-cooling tube in each of the sub-current measurement units is adjustable.

7. The current measuring device for an electrode of an ore-fired furnace according to any one of claims 1 to 4, characterized in that: Also includes: A cooling tank, a plurality of sub-cooling tanks and a controller, wherein the plurality of sub-cooling tanks and the cooling tank store cooling liquid, and the controller is configured to control one or more of the plurality of sub-cooling tanks and the cooling tank to deliver the cooling liquid to the liquid inlet according to the current of the current acquisition unit and the temperature of the cooling liquid in the cooling pipe.

8. The current measuring device for an electrode of an electric arc furnace according to claim 7, characterized in that: A plurality of the sub-cooling grooves are all connected to the cooling groove, and the coolant in the cooling groove is suitable for flowing into the corresponding sub-cooling grooves.

9. The current measuring device for an electrode of an electric arc furnace according to claim 7, characterized in that: A liquid level sensor is provided in each of the sub-cooling grooves, and the liquid level sensor is configured to detect the liquid level height of the coolant in the sub-cooling groove; The controller is used to control the multiple sub-cooling slots to deliver the coolant to the liquid inlet in sequence, and is configured to control the next sub-cooling slot to deliver the coolant to the liquid inlet when the liquid level height of the current sub-cooling slot reaches the lower limit of the liquid level.

10. The current measuring device for an electrode of an electric arc furnace according to claim 7, characterized in that: The multiple sub-cooling slots include a first sub-cooling slot, a second sub-cooling slot and a third sub-cooling slot, and the multiple cooling modules include an air cooling module, a water cooling module and an air conditioning cooling module. The air cooling module is suitable for cooling the coolant in the first sub-cooling slot, the water cooling module is suitable for cooling the coolant in the second sub-cooling slot, and the air conditioning cooling module is suitable for cooling the coolant in the third sub-cooling slot.

11. The current measuring device for an electrode of an electric arc furnace according to claim 7, characterized in that: The temperatures of the coolant in the plurality of sub-cooling slots are all different, and the controller is configured to control the corresponding sub-cooling slots in sequence to deliver the coolant to the liquid inlet according to the temperature of the coolant from high temperature to low temperature.

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