CN215524167U - Furnace bottom structure of medium-frequency induction furnace - Google Patents

Abstract

The utility model discloses a furnace bottom structure of an intermediate frequency induction furnace, which comprises a fixed support, a bottom magnetic yoke and side magnetic yokes, wherein the bottom magnetic yoke is provided with a plurality of groups, the plurality of groups of bottom magnetic yokes are circumferentially and horizontally arranged above the fixed support, the bottoms of two ends of each group of bottom magnetic yokes are connected with the fixed support, the plurality of groups of side magnetic yokes are circumferentially and vertically arranged above the fixed support, each group of side magnetic yokes correspond to one group of bottom magnetic yokes and are connected with the bottom magnetic yokes, and the bottom magnetic field lines of an induction coil of the intermediate frequency furnace are constrained to the middle part of a furnace body through the arranged bottom magnetic yokes and the side magnetic yokes.

Description

Furnace bottom structure of medium-frequency induction furnace

Technical Field

The utility model relates to the technical field of casting, in particular to a furnace bottom structure of a medium-frequency induction furnace.

Background

The steel-making and casting industry of the medium frequency induction furnace at home and abroad has a long history, lays a deep foundation for the development of the smelting industry in China, and makes a great contribution. The method still plays an extremely important role in the smelting and casting industries so far, and is the first choice of related enterprises.

However, as the times are developing and scientific technology is continuously innovated, each enterprise has special requirements on energy conservation, consumption reduction, potential excavation and efficiency improvement.

The traditional intermediate frequency furnace process has the following defects:

(1) the furnace bottom has simple structure: the furnace bottom is directly made of high-temperature resistant casting materials, a magnetic field short circuit ring (a circular ring wound by a copper pipe) is arranged in the furnace bottom, an electromagnetic field at the bottom of an induction coil of the intermediate frequency furnace is mainly consumed, and the steel structure is prevented from heating and reddening or even melting due to the fact that the electromagnetic field is induced to the steel structure at the bottom of the electric furnace;

(2) because of the short circuit ring at the bottom of the electric furnace, electromagnetic energy is continuously consumed in the actual smelting process, so that part of power of the medium-frequency electric furnace does useless work. Thus, the conversion efficiency of the conductive energy is reduced, the melting time is prolonged, the power consumption is increased and other adverse factors influence the conversion benefit of the electric energy;

(3) because the time of the molten iron in the furnace is prolonged by 5-10 minutes, the molten iron can be oxidized, and certain influence is exerted on the internal quality of a cast product;

(4) because the time of the molten iron in the furnace is prolonged by 5-10 minutes, the single-shift yield is reduced;

(5) the original furnace bottom structure adopts the short circuit ring, so that the electric energy loss is large and the production cost is high;

therefore, the utility model provides a furnace bottom structure of the medium-frequency induction furnace, which can solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a furnace bottom structure of a medium-frequency induction furnace, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a bottom structure of a medium frequency induction furnace, comprising:

a fixed support;

the bottom magnetic yokes are provided with a plurality of groups and are circumferentially and horizontally arranged above the fixed support, and the bottoms of two ends of each group of bottom magnetic yokes are connected with the fixed support;

the side portion yoke, the side portion yoke has the multiunit, and the vertical setting in circumference is in fixed bolster top, and every group the side portion yoke all corresponds with a set of bottom yoke to be connected with the bottom yoke.

As a preferable technical scheme of the utility model, a mica plate is arranged between the bottom magnetic yoke and the fixed support.

As a preferable technical scheme, an insulating plate is arranged between the mica plate and the fixed support.

As a preferable technical solution of the present invention, a cooling pipe is provided in the side yoke, and circulation pipes are provided at both ends of the cooling pipe.

As a preferable technical scheme of the utility model, a stainless steel hoop is arranged at the joint of the cooling pipe and the circulating pipe.

As a preferable technical scheme, the magnetic suspension device further comprises a bottom transverse magnetic yoke and a bottom vertical magnetic yoke, wherein the bottom transverse magnetic yoke and the bottom vertical magnetic yoke are vertically arranged above the fixed support, the bottoms of two ends of the bottom transverse magnetic yoke and the bottom vertical magnetic yoke are connected with the fixed support, and the tops of the two ends of the bottom transverse magnetic yoke and the bottom vertical magnetic yoke are respectively provided with a side magnetic yoke.

Compared with the prior art, the utility model has the beneficial effects that: according to the furnace bottom structure of the intermediate frequency induction furnace, the magnetic field line at the bottom of the induction coil of the intermediate frequency furnace is constrained to the middle part of the furnace body through the bottom magnetic yoke and the side magnetic yoke, so that the smelting efficiency of steel is effectively improved, the smelting time is shortened, the furnace bottom is prevented from being heated and reddened or even melted due to the induction of an electromagnetic field, the utilization rate of power resources is improved, and the economic benefit is good.

Drawings

FIG. 1 is a schematic view of the overall construction of the hearth structure of the present invention;

fig. 2 is a bottom view showing a connection relationship between a bottom yoke and a side yoke in embodiment 1 of the present invention;

fig. 3 is a bottom view showing a connection relationship between a bottom yoke and a side yoke in embodiment 2 of the present invention;

FIG. 4 is a schematic view of a conventional furnace bottom construction;

FIG. 5 is a graph of magnetic field line distribution for an application of the inventive furnace bottom structure;

FIG. 6 is a graph of magnetic field lines applied to a conventional furnace floor structure;

in the figure: 100. a fixed support; 110. mica plates; 120. an insulating plate; 200. a bottom yoke; 210. a bottom transverse yoke; 220. a bottom vertical magnetic yoke; 300. a side yoke; 310. a cooling tube; 400. the bottom is made of steel; 410. a short circuit ring; 500. the magnetic field lines.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Please refer to FIGS. 1-6

Example 1

The utility model provides a technical scheme that: a furnace bottom structure of a medium frequency induction furnace comprises a fixed support 100;

the bottom magnetic yokes 200 are provided with a plurality of groups, are circumferentially and horizontally arranged above the fixed support 100, and the bottoms of the two ends of each group of bottom magnetic yokes 200 are connected with the fixed support 100;

the side yokes 300 and the side yokes 300 have a plurality of groups, are vertically arranged above the fixed support 100 in the circumferential direction, and each group of the side yokes 300 corresponds to one group of the bottom yokes 200 and is connected with the bottom yokes 200.

Specific, compare with traditional furnace bottom structure, the bottom steel structure 400 that traditional stove bottom directly adopted the high temperature resistant pouring material, inside lays magnetic field short circuit ring 410 and comes to intermediate frequency furnace induction coil bottom electromagnetic field consumption, and this furnace bottom structure retrains intermediate frequency furnace induction coil bottom magnetic field 500 to the furnace body middle part through bottom yoke 200 and the lateral part yoke 300 that sets up, effectively improve the smelting efficiency to steel, shorten the smelting time, and avoided the stove bottom to receive the electromagnetic field induction to cause and generate heat redden, even melt, the utilization ratio of power resource has been improved, economic benefits is good.

Example 2

On the basis of embodiment 1, still include horizontal yoke 210 of bottom and bottom vertical yoke 220, horizontal yoke 210 of bottom and bottom vertical yoke 220 mutually perpendicular set up in fixed bolster 100 top, both ends bottom all is connected with fixed bolster 100, and both ends top is provided with lateral part yoke 300 respectively.

Example 3

On the basis of embodiment 1 or embodiment 2, the mica plate 110 is disposed between the bottom yoke 200 and the fixed support 100, and the insulating plate 120 is disposed between the mica plate 110 and the fixed support 100.

Specifically, the insulating plate 120 and the mica plate 110 are arranged to support and isolate the bottom yoke 200, resist high temperature, and be insulated from the fixing support 100.

Example 3

On the basis of embodiment 1, embodiment 2 or embodiment 3, the cooling pipe 310 is arranged in the side yoke 300, and circulating pipes are arranged at two ends of the cooling pipe 310; the connection of the cooling pipe 310 and the circulation pipe is provided with a stainless steel clamp.

Specifically, the side yoke 300 is cooled by the cooling pipe 310 and the circulation pipe.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a medium frequency induction furnace bottom construction, its application and electric stove bottom, its characterized in that includes:

a fixed support;

the bottom magnetic yokes are provided with a plurality of groups and are circumferentially and horizontally arranged above the fixed support, and the bottoms of two ends of each group of bottom magnetic yokes are connected with the fixed support;

the side portion yoke, the side portion yoke has the multiunit, and the vertical setting in circumference is in the fixed bolster top, and every group the side portion yoke all corresponds with a set of bottom yoke to be connected with the bottom yoke.

2. The bottom structure of an induction furnace according to claim 1, wherein a mica plate is disposed between the bottom yoke and the fixed support.

3. The hearth structure of the medium frequency induction furnace according to claim 2, wherein an insulating plate is disposed between the mica plate and the fixed support.

4. The hearth structure of the medium frequency induction furnace according to claim 1, wherein a cooling pipe is provided in the side yoke, and circulation pipes are provided at both ends of the cooling pipe.

5. The hearth structure of the medium frequency induction furnace according to claim 4, wherein a stainless steel band is provided at a junction of the cooling pipe and the circulation pipe.

6. The bottom structure of an intermediate frequency induction furnace according to claim 1, further comprising a bottom transverse magnetic yoke and a bottom vertical magnetic yoke, wherein the bottom transverse magnetic yoke and the bottom vertical magnetic yoke are vertically arranged above the fixed support, the bottoms of both ends are connected with the fixed support, and the tops of both ends are respectively provided with a side magnetic yoke.

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