CN218896542U

CN218896542U - Direct current arc furnace and direct current reactor mounting structure for direct current submerged arc furnace

Info

Publication number: CN218896542U
Application number: CN202220814564.9U
Authority: CN
Inventors: 宋喜庆; 宋宝庆; 宋子玉; 奚鹏
Original assignee: Anyang Younengde Electric Co ltd
Current assignee: Anyang Younengde Electric Co ltd
Priority date: 2022-03-27
Filing date: 2022-03-27
Publication date: 2023-04-21
Anticipated expiration: 2032-03-27

Abstract

The utility model relates to a direct current arc furnace and a direct current reactor mounting structure for a direct current submerged arc furnace, which comprises a reactor, wherein the reactor comprises a winding arranged on an iron core, an upper frame type frame, a lower frame type frame and a pull rod fixed between the upper frame type frame and the lower frame type frame, the winding comprises a copper pipe wound on the iron core and an insulating film layer wound on the periphery of the copper pipe, and both ends of the copper pipe extend to the outside of the insulating film layer; the iron core comprises a U-shaped iron core fixed on the lower frame and an I-shaped iron core horizontally fixed on the upper frame, the copper pipe is wound on an upright post of the U-shaped iron core, and an insulating cushion layer is fixed between the U-shaped iron core and the I-shaped iron core; an insulating box is arranged on the outer side of the reactor, a filling space is formed between the reactor and the insulating box, and epoxy resin is filled in the filling space in a filling mode. The utility model has the advantages of reducing the volume of the reactor, reducing the heating value of the reactor and resisting the damage of electromagnetic force to the reactor.

Description

Direct current arc furnace and direct current reactor mounting structure for direct current submerged arc furnace

Technical Field

The utility model relates to the field of direct current reactors, in particular to a direct current reactor mounting structure for a direct current arc furnace and a direct current submerged arc furnace.

Background

In the field of metal, non-metal and ferroalloy smelting, electric arc furnaces are commonly used as smelting equipment. In the metal smelting process, the resistivity of the furnace burden is suddenly reduced at the moment when the metal oxide is reduced into elemental metal atoms, so that a large impact current often occurs. This large rush current, if not suppressed, can lead to an overcurrent trip, causing significant production difficulties.

The three-phase alternating current arc furnace is characterized in that an alternating current reactor is added on the primary side of a smelting transformer, the scheme directly leads to the power factor of the whole system to be reduced, and the power factor is reduced to 0.6 under severe conditions.

The direct current arc furnace and the direct current submerged arc furnace can put the reactor for suppressing the impact current in the direct current loop instead of being put on the primary side of the transformer, so that the scheme can suppress the impact current and does not reduce the power factor.

Because the power of the direct current arc furnace and the direct current ore-smelting furnace is relatively high, the direct current of the direct current arc furnace and the direct current ore-smelting furnace is basically of ten thousand ampere level, and the direct current of the direct current arc furnace and the direct current ore-smelting furnace with relatively low power is also more than 5000A. In the prior art, the reactor is usually coiled by enameled wires on the bottom insulation, the magnetic circuit is made of laminated iron cores or ferrite, and under the condition of high current operation, the heat dissipation problem is not well handled in the process, so that the utilization rate of winding space is low, the size is increased, and the reactor is seriously overheated.

There is another plagued in applications: because the working current is relatively large, non-negligible electromagnetic acting force occurs between the copper pipe and the copper pipe, between the copper pipe and the iron core and between the iron core and the iron core, the electromagnetic acting force causes displacement, friction and vibration between the copper pipe and the copper pipe, between the iron core and the pull rod and between the pull rod and the nut, and the pull rod loosens, the insulating layers between the copper pipe and between the copper pipe and the iron core are damaged for a long time, so that the reactor is scrapped.

Accordingly, there is a need for further improvement in the dc reactor mounting structure for dc arc furnaces and dc submerged arc furnaces.

Disclosure of Invention

The utility model aims to provide a direct current arc furnace and a direct current reactor mounting structure for a direct current submerged arc furnace, which can reduce the heating degree of a reactor and resist the damage of electromagnetic force to the reactor.

In order to achieve the aim of the utility model, the utility model provides a direct current arc furnace and a direct current reactor mounting structure for a direct current submerged arc furnace, which comprises a reactor, wherein the reactor comprises a winding arranged on an iron core, an upper frame type frame, a lower frame type frame and a pull rod fixed between the upper frame type frame and the lower frame type frame, the winding comprises a copper pipe wound on the iron core and an insulating film layer wound on the periphery of the copper pipe, two ends of the copper pipe extend to the outside of the insulating film layer, and an inner cavity of the copper pipe is a water cooling cavity;

the copper pipe is wound on an upright post of the U-shaped iron core, and an insulating cushion layer is fixed between the U-shaped iron core and the I-shaped iron core;

the reactor is characterized in that an insulation box is arranged on the outer side of the reactor, two ends of the copper pipe extend to the outer portion of the insulation box, a filling space is formed between the reactor and the insulation box, and epoxy resin is filled in the filling space in a filling mode.

Further, at least two copper pipes wound in the same direction are wound on each upright post of the U-shaped iron core, the head end of each copper pipe is connected with a rectifier bridge, and the tail ends of all copper pipes are connected together to form an output total tail end.

Further, the U-shaped iron core and the I-shaped iron core are of an integrated structure or of a split structure formed by overlapping silicon steel sheets.

Further, the silicon steel sheets are arranged in a horizontal direction.

Further, the cross section of the upright post of the U-shaped iron core is circular.

Further, the length L of the I-shaped iron core gradually decreases from the middle to two sides.

Further, the pull rod is a screw rod, the lower end of the screw rod is in threaded connection with the lower frame, and the upper end of the screw rod passes through a through hole formed in the upper frame and is in threaded connection with a fastening nut arranged above the upper frame.

Further, the outer walls of the two ends of the copper pipe are respectively fixed with a wiring end copper plate with screw holes.

Furthermore, the insulating box is a square box which is made of 6mm thick bakelite plates and is 5mm larger than the external dimension of the reactor, wiring copper pipes of each group of wire packages of the reactor are penetrated out of the bakelite plates at the front side, and no bakelite plate is arranged on the upper end face.

Compared with the prior art, the direct current electric arc furnace and the direct current reactor mounting structure for the direct current submerged arc furnace have the following advantages:

(1) The copper pipe and the insulating film layer are used for winding, and cold water can be introduced into the inner cavity of the copper pipe to perform water cooling and heat dissipation when the copper pipe performs a conductive function, so that the direct current reactor has the advantages of compact integral structure, small size, simple manufacturing process and good heat dissipation;

(2) Gaps between the copper pipe and the copper pipe, between the copper pipe and the iron core, between the iron core and the iron core, the upper frame, the lower frame and the supporting rods are filled with epoxy resin to seal, so that secondary fixing effects are obtained between the copper pipe and the copper pipe, between the copper pipe and the iron core, between the iron core and the iron core, between the upper frame and the lower frame and between the pull rods, and the damage effect of strong electromagnetic force on the reactor can be effectively resisted.

Drawings

FIG. 1 is a front view of the present utility model;

FIG. 2 is a top view of the present utility model;

FIG. 3 is a schematic diagram of the positional relationship between a U-shaped iron core and an I-shaped iron core in the present utility model;

fig. 4 is a top view of an I-core of the present utility model;

FIG. 5 is a schematic diagram of a method of winding copper tubing in accordance with the present utility model;

FIG. 6 is a schematic view of the copper tube structure of the present utility model;

fig. 7 is a schematic view of the structure of a copper terminal plate according to the present utility model;

in the figure: 1. a winding; 1-1, copper pipe; 1-2, an insulating film layer; 2. an upper frame; 3. a lower frame; 4. a pull rod; 5. a U-shaped iron core; 6. an I-shaped iron core; 7. an insulating pad layer; 8. screw holes; 9. and (5) a wiring terminal copper plate.

Detailed Description

The utility model is further described below with reference to the drawings and specific examples.

As shown in fig. 1 to 7, the direct current arc furnace and the direct current reactor mounting structure for the direct current submerged arc furnace comprise a reactor, wherein the reactor comprises a winding 1 arranged on an iron core, an upper frame type frame 2, a lower frame type frame 3 and a pull rod 4 fixed between the upper frame type frame 2 and the lower frame type frame 3, the winding 1 comprises a copper pipe 1-1 wound on the iron core and an insulating film layer 1-2 wound on the periphery of the copper pipe 1-1, the copper pipe 1-1 has the structure shown in fig. 6, both ends of the copper pipe 1-1 extend to the outside of the insulating film layer 1-2, and an inner cavity of the copper pipe 1-1 is formed into a water cooling cavity;

the iron core comprises a U-shaped iron core 5 fixed on the lower frame 3 and an I-shaped iron core 6 horizontally fixed on the upper frame 2, an insulating cushion layer 7 is fixed between the U-shaped iron core 5 and the I-shaped iron core 6, and the copper pipe 1-1 is wound on an upright post of the U-shaped iron core 5; an insulating cushion layer 7 with moderate thickness is arranged between the U-shaped iron core 5 and the I-shaped iron core 6 to form an air gap, so that magnetic saturation can be avoided;

an insulation box is arranged on the outer side of the reactor, and is generally made of 6mm bakelite plate, a filling space is formed between the reactor and the insulation box, and epoxy resin is filled in the filling space in a filling mode.

As shown in fig. 5, at least two copper tubes 1-1 wound in the same direction are wound on each upright post of the U-shaped iron core 5, the head end of each copper tube 1-1 is connected with a rectifier bridge, and the tail ends of all copper tubes 1-1 are connected together to form an output total tail end. The output total tail end is used for connecting a load, so that the direct current reactor is reduced in size, space is fully utilized, installation area is saved, long-term stable operation is realized in 24 hours, and the failure rate is extremely low.

The U-shaped iron core 5 is of an integrated structure, or the U-shaped iron core 5 is of a split structure formed by overlapping silicon steel sheets. The user can select the U-shaped iron core 5 with a proper structure according to the actual situation of the user, and different use requirements of different users can be better met.

As shown in FIG. 2, the cross section of the upright post of the U-shaped iron core 5 is circular, so that the copper pipe 1-1 is more convenient to wind, and the copper pipe 1-1 can be fully contacted with the U-shaped iron core 5.

The I-shaped iron core 6 is a layered structure formed by sequentially stacking a group of silicon steel sheets, all of which are arranged in the horizontal direction, or the I-shaped iron core 6 is an integrally formed structure made of ferrite material or is formed by stacking silicon steel sheets. The user can select the I-shaped iron core 6 with a proper structure according to the actual situation of the user, and different use requirements of different users can be better met.

The length L of the I-shaped iron core 6 gradually decreases from the middle to the two sides, and as shown in fig. 4, the appearance is neat and beautiful.

The supporting rod 4 is a screw rod, the lower end of the screw rod is in threaded connection with the lower frame 3, and the upper end of the screw rod passes through a through hole formed in the upper frame 2 and is in threaded connection with a fastening nut arranged above the upper frame 2. The screw rod is only required to be rotated during disassembly and assembly, so that the assembly and disassembly are simpler and more convenient, and time and labor are saved.

Terminal copper plates 9 with screw holes 8 are fixed on the outer walls of the two ends of the copper tube 1-1, and the copper tube 1-1 is conveniently electrically connected with external equipment by using the screw holes 8 as shown in fig. 7.

The insulating box is a rectangular box which is made of 6mm thick bakelite plates and is 5mm larger than the external dimension of the reactor, wiring copper pipes of each group of wire bags of the reactor are penetrated out of the bakelite plates at the front side, the bakelite plates are not arranged on the upper end face, epoxy resin is poured into gaps between the bakelite plates on the upper end face and the reactor after being stirred uniformly in proportion, and after waiting for a certain time, the epoxy resin is solidified to form a firm whole reactor, so that the insulating box is very suitable for being applied to occasions with high-power high-electric electromagnetic force.

When the utility model is specifically used, as shown in fig. 1 and 2, the upper frame 2 and the lower frame 3 both comprise a front cross beam, a rear cross beam and a left cross beam and a right cross beam with external threads, the cross beams are provided with through holes, the end parts of the cross beams penetrate through the through holes on the cross beams and are in threaded connection with nuts, and the utility model has the advantages of simple structure, convenient and quick disassembly, time saving and labor saving. The insulating film layer 1-2 is directly wound on the outer wall of the copper pipe 1-1, so that the operation is simpler. The copper pipe 1-1 plays a role in conducting electricity, and meanwhile cold water can be introduced into the inner cavity of the copper pipe 1-1 to play a role in water cooling and heat dissipation, so that the direct current reactor is compact in overall structure, small in size, simple in manufacturing process and good in heat dissipation, solves the problem of severe overheating of the reactor in the prior art, and is very suitable for being applied to occasions with high power and high current.

In the description of the present specification, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present patent and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present patent application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present patent application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this specification, unless clearly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in this specification will be understood by those of ordinary skill in the art in view of the specific circumstances.

In this specification, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. The direct current electric arc furnace and the direct current reactor mounting structure for the direct current submerged arc furnace are characterized by comprising a reactor, wherein the reactor comprises a winding arranged on an iron core, an upper frame type frame, a lower frame type frame and a pull rod fixed between the upper frame type frame and the lower frame type frame, the winding comprises a copper pipe wound on the iron core and an insulating film layer wound on the periphery of the copper pipe, two ends of the copper pipe extend to the outer part of the insulating film layer, and an inner cavity of the copper pipe is a water cooling cavity;

2. The direct current arc furnace, direct current reactor mounting structure for direct current submerged arc furnace according to claim 1, wherein at least two copper tubes wound in the same direction are wound on each upright post of the U-shaped iron core, the head end of each copper tube is connected with a rectifier bridge, and the tail ends of all copper tubes are connected together to form an output total tail end.

3. The direct current arc furnace, direct current reactor mounting structure for direct current submerged arc furnace of claim 1, wherein the U-shaped iron core and the I-shaped iron core are both of an integrally formed structure or a split structure formed by stacking silicon steel sheets.

4. The direct current arc furnace, direct current reactor mounting structure for a direct current submerged arc furnace according to claim 3, wherein the silicon steel sheets are arranged in a horizontal direction.

5. The direct current arc furnace, direct current reactor mounting structure for direct current submerged arc furnace of claim 1, wherein the cross section of the upright post of the U-shaped iron core is circular.

6. The direct current arc furnace, direct current reactor mounting structure for direct current submerged arc furnace of claim 1, wherein the length L of the I-shaped iron core gradually decreases from the middle to both sides.

7. The dc reactor mounting structure for dc arc furnaces and dc submerged arc furnaces as set forth in claim 1, wherein the tie rod is a screw, the lower end of the screw is screwed to the lower frame, and the upper end of the screw is screwed to a fastening nut provided above the upper frame after passing through a via hole provided in the upper frame.

8. The direct current arc furnace, direct current reactor mounting structure for direct current submerged arc furnace of claim 1, wherein the copper plates with screw holes are fixed on the outer walls of both ends of the copper tube.

9. The direct current arc furnace, direct current reactor mounting structure for a direct current submerged arc furnace according to claim 1, wherein the insulation box is a rectangular box which is made of 6mm thick bakelite plates and is 5mm larger than the external dimension of the reactor, wiring copper pipes of each group of the reactor are penetrated out of the bakelite plates at the front side, and no bakelite plate is arranged at the upper end face.