CN203174147U

CN203174147U - Shielding small furnace cover of VD (vacuum degassing) furnace

Info

Publication number: CN203174147U
Application number: CN 201320149881
Authority: CN
Inventors: 万羽
Original assignee: PANZHIHUA DUOSHI MACHINERY MANUFACTURING Co Ltd
Current assignee: PANZHIHUA DUOSHI MACHINERY MANUFACTURING Co Ltd
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2013-09-04
Anticipated expiration: 2023-03-29

Abstract

The utility model discloses a shielding small furnace cover of a VD (vacuum degassing) furnace. The shielding small furnace cover comprises a shell and an insulating layer covered by the shell, wherein high temperature resistant glass is embedded on the shell; and a hole with an area bigger than that of the high temperature resistant glass is formed in the position, corresponding to the high temperature resistant glass, of the insulating layer. The shielding small furnace cover can be convenient for operators to observe the state of smelting of the VD furnace so as to improve the smelting quality.

Description

A kind of VD stove shields little bell

Technical field

The utility model belongs to the smelting iron and steel technical field, relates to a kind of VD vacuum degassing furnace specifically and shields little bell.

Background technology

The VD vacuum degassing furnace is irritated lid and generally is made up of the big bell of sealing and center shielding port lid; the main effect that the center shields little bell is the hyperthermia radiation of shielding Vacuum Degassing Process molten steel and prevents that slag from directly spilling; protect big bell; alleviate the damage of the big bell of high temperature nuclear reactor and configuration device thereof, guarantee that vacuum sloughs carrying out smoothly of refining process.Simultaneously, the heat in the shielding stove reduces heat and scatters and disappears, and plays insulation and avoid causing the excessive effect of molten steel temperature drop in VD stove Vacuum Degassing Process.The VD stove shields little bell and mainly contains two kinds of anti-material and water-cooleds.It is to be made of bell shell and the inner thermal insulation layer liner of anti-material two portions of tiing a knot or pouring into a mould that anti-material shields little bell, and heat insulation effect is better than the little bell of water-cooled.In Vacuum Degassing Process, the center shields high temperature furnace slag and the chemical erosion of gas and the mechanical vibration effect that stirring causes that little bell is subjected to the washing away of high temperature gas flow, splash, outside box hat is at high temperature yielding, cause inner anti-material to come off, reduce its work-ing life greatly, and more switching center9 to shield the difficulty of little bell big, the time is long, make the VD stove long stoppage time, reduce its utilization ratio.

At this situation, the Chinese utility model patent of application number 201020209080.9 discloses a kind of VD stove and has shielded little bell, comprise shell and thermal insulation layer, between shell and thermal insulation layer, insulation layer is set, inner surface of outer cover is provided with the fixedly reinforcing bar that is uneven in length, fixedly reinforcing bar is deep into thermal insulation layer and thermal insulation layer, and shell, insulation layer and thermal insulation layer are contacted closely and reinforcing.

Yet the VD stove need to observe the smelting state in the stove, and existing VD stove shields little bell owing to there is not corresponding structure design in the process of the degassing, make the staff can not observe the smelting state in the stove.

The utility model content

The utility model is to overcome the problem that existing VD stove bell exists, and provides a kind of VD stove to shield little bell, can the handled easily personnel observe the state that the VD stove is smelted, and then improve the quality of smelting.

For addressing the above problem, the technical solution adopted in the utility model is:

A kind of VD stove shields little bell, comprise shell and thermal insulation layer, described shell is coated on described thermal insulation layer outside, and it is characterized in that: be embedded with pyroceram on the described shell, described thermal insulation layer and described pyroceram correspondence position are provided with area greater than the hole of pyroceram area.

Further, described pyroceram outer rim is equipped with the high-temperature resistant rubber sealing-ring.

Further, described pyroceram adopts the material pyroceram No. 4.

Further, described pyroceram is circular glass, and radius is 3-10mm.

Further, described pyroceram is arranged on the top of shell.

Further, also be provided with thermal insulation layer between described shell and the thermal insulation layer, described inner surface of outer cover is provided with the fixedly reinforcing bar that is uneven in length.

Further, described insulation layer and described pyroceram correspondence position are provided with area greater than the cavity of pyroceram area.

Further, described thermal insulation layer material is the little refractory fibre of thermal conductivity, and thickness is 15-25mm.

Compared with prior art, the utlity model has following beneficial effect:

One, the utility model VD stove shields little bell, comprises shell and thermal insulation layer, and shell is coated on the thermal insulation layer outside, is embedded with pyroceram on the shell, and thermal insulation layer and glass correspondence position are provided with area greater than the hole of transparency area.By being embedded with pyroceram at shell, the staff sees through glass can observe the interior smelting situation of VD stove, and then improves the quality of smelting.

Two, pyroceram outer rim of the present utility model is equipped with the high-temperature resistant rubber sealing-ring, by the high-temperature resistant rubber sealing-ring, can play the effect of sealing, simultaneously because pyroceram has certain thermal expansion under action of high temperature, the high-temperature resistant rubber sealing-ring has the effect of buffering again, prevent that pyroceram from damaging because of expansion, the feasible characteristics that the utlity model has long service life.

Four, pyroceram of the present utility model adopts the material pyroceram No. 4, can be in long term operation under the hot environment, and colour-fast, softening, thermal expansion is minimum, also have the excellent acid characteristic simultaneously, make the utlity model has practical, long service life.

Five, pyroceram of the present utility model is arranged on the top of shell, can know the smelting situation in the stove, makes things convenient for the staff to observe.

Six, also be provided with thermal insulation layer between shell of the present utility model and the thermal insulation layer, can effectively be reduced in the temperature of VD stove Vacuum Degassing Process shell, avoided shell Yin Gaowen and be out of shape the problem that comes off of the anti-material that causes, thereby improve work-ing life.

Description of drawings

Fig. 1 is front view of the present utility model;

Fig. 2 is vertical view of the present utility model;

Fig. 3 is sectional view of the present utility model;

Mark among the figure: 1, shell, 2, stiffening web, 3, pyroceram, 4, thermal insulation layer, 5, thermal insulation layer.

Embodiment

The utility model will be further described below in conjunction with the drawings and the specific embodiments.

VD stove of the present utility model shields little bell, comprises shell and thermal insulation layer, and shell is coated on the thermal insulation layer outside; Be embedded with pyroceram on the shell, thermal insulation layer and pyroceram correspondence position are provided with area greater than the hole of pyroceram area.Staff's permeation high temperature resistant glass can be observed the situation of smelting in the stove, and then improves the quality of smelting.

Further, the pyroceram outer rim is equipped with the high-temperature resistant rubber sealing-ring, owing under action of high temperature, have certain thermal expansion buying high temp glass, and therefore by setting the high-temperature resistant rubber sealing-ring in the pyroceram outer rim, can play the effect of buffering, have the effect of sealing again.

Further, pyroceram adopts the material pyroceram No. 4, and No. 4 the material pyroceram is a kind of of pyroceram kind, and those skilled in the art can understand and understand.No. 4 the material pyroceram is the highest glass of heat resisting temperature in all pyroceram products, the environment that can be in high temperature is for a long time worked, colour-fast, indeformable, thermal expansivity is minimum simultaneously, be equivalent to 1/12-1/20 of common glass, be able to take 1200 ℃ of-25 ℃ of normal-temperature water thermal cyclings.Also have the excellent acid characteristic simultaneously, except hydrofluoric acid and the phosphoric acid more than 300 ℃, the acid solution of any concentration is until boiling point, and is all minimum to its erosion, the also erosion of ability neutral substance, though it responds with alkali, speed of response is smaller.Therefore, No. 4 material of the utility model use are high temperature resistant can improve work-ing life of the present utility model.

In order to improve structural stability of the present utility model further, the utility model is provided with stiffening web at shell.

Further, pyroceram is circular glass, and radius is 3-10mm.

Further, pyroceram is arranged on the top of shell, can know the smelting situation in the stove, makes things convenient for the staff to observe.

Further, also be provided with thermal insulation layer between shell and the thermal insulation layer, inner surface of outer cover is provided with the fixedly reinforcing bar that is uneven in length simultaneously, and fixedly reinforcing bar gos deep into thermal insulation layer and thermal insulation layer, and shell, thermal insulation layer and thermal insulation layer are contacted closely and reinforcing.Can effectively be reduced in the temperature of VD stove Vacuum Degassing Process shell, avoid shell Yin Gaowen and be out of shape the problem that comes off of the anti-material that causes, thereby improve work-ing life.

Further, insulation layer and pyroceram correspondence position are provided with area greater than the cavity of pyroceram area.

Further, the thermal insulation layer material is the little refractory fibre of thermal conductivity, and thickness is 15-25mm.Refractory fibre also belongs to prior art products.

The utility model can make the staff clearly see the situation of smelting in the stove, improves the quality of smelting.

Claims

1. a VD stove shields little bell, comprise shell and thermal insulation layer, described shell is coated on described thermal insulation layer outside, and it is characterized in that: be embedded with pyroceram on the described shell, described thermal insulation layer and described pyroceram correspondence position are provided with area greater than the hole of pyroceram area.

2. VD stove according to claim 1 shields little bell, it is characterized in that: described pyroceram outer rim is equipped with the high-temperature resistant rubber sealing-ring.

3. VD stove according to claim 1 shields little bell, it is characterized in that: described pyroceram adopts the material pyroceram No. 4.

4. VD stove according to claim 1 shields little bell, it is characterized in that: described pyroceram is circular glass, and radius is 20-60mm.

5. VD stove according to claim 1 shields little bell, it is characterized in that: described pyroceram is arranged on the top of shell.

6. VD stove according to claim 1 shields little bell, it is characterized in that: also be provided with thermal insulation layer between described shell and the thermal insulation layer.