CN202430260U

CN202430260U - Severe-convection bell type bright annealing furnace

Info

Publication number: CN202430260U
Application number: CN201120520282XU
Authority: CN
Inventors: 陈金祥
Original assignee: DANYANG HENG TAI ELECTRIC FURNACE Co Ltd
Current assignee: DANYANG HENG TAI ELECTRIC FURNACE Co Ltd
Priority date: 2011-12-14
Filing date: 2011-12-14
Publication date: 2012-09-12
Anticipated expiration: 2021-12-14

Abstract

The utility model discloses a severe-convection bell type bright annealing furnace and relates to the technical field of electric furnace production. The severe-convection bell type bright annealing furnace comprises a base and a furnace shell, the furnace shell fixedly covers the base to form a furnace hearth, a furnace lining is fixed on the inner periphery of the furnace shell, and heating elements are fixed on the furnace lining. The severe-convection bell type bright annealing furnace is characterized by further comprising an inner cover and a furnace seat, the inner cover is fixed on an inner base of the furnace hearth through a flange plate arranged on the lower portion, seal rings are fixed between the flange plate of the inner cover and the base so that a sealed furnace hearth is formed, the furnace seat is fixed on the inner base of the furnace hearth, a fan driven by a hermetic motor is further fixed in an inner cavity of the furnace seat, and the furnace seat is provided with an air outlet. The severe-convection bell type bright annealing furnace is mainly used for bright annealing of steel products or copper products in the protective atmosphere and enables protective gas to form severe-convection circulation, uniform temperature in the furnace hearth is guaranteed, a heat source is fully used, heat exchange efficiency is improved, electricity and energy are saved, product processing time is shortened while product performance is improved, and the severe-convection bell type bright annealing furnace is high in applicability.

Description

A kind of strong convection bell-jar bright annealing oven

Technical field

The utility model relates to the electric furnace production technical field, relates in particular to strong convection bell-jar bright annealing oven.

Background technology

Metallic substance because trace (interpolation) unit of being contained have stronger oxygen affinity, is easy to form oxide compound and failure surface smooth finish, thereby can't realizes the processing such as copper materials such as " bright copper pipes ", steel metallic substance in annealing process.And adopt lehre to carry out metallic substance annealing, when temperature was higher in the stove, gas density was relatively low, can make that again heat exchanger effectiveness is lower.

The utility model content

The purpose of the utility model is to provide a kind of strong convection bell-jar bright annealing oven, improves to the deficiency that exists in the prior art.

The technical scheme that the utility model provides is:

A kind of strong convection bell-jar bright annealing oven comprises base and furnace shell, said furnace shell fixedly cover cap on base; Form burner hearth, week be fixed with furnace lining in the said furnace shell, heating unit is fixed on the furnace lining; It is characterized in that, also comprise inner cover and stove seat, the ring flange that said inner cover is provided with through the bottom is fixed within the burner hearth on the base; Be fixed with sealing-ring between the ring flange of said inner cover and the base, forming the furnace chamber of sealing, said stove seat is fixed within the furnace chamber on the base; In the said stove seat inner chamber, also be fixed with the blower fan that drives through sealed electric-motor, said stove seat is provided with air outlet.

Said strong convection bell-jar bright annealing oven is characterized in that be fixed with reference column on the said base, said furnace shell and inner cover are respectively equipped with locating sleeve, and said furnace shell and inner cover are enclosed within on the reference column through locating sleeve and position.

The utility model strong convection light bell-jar lehre is mainly the usefulness of steel or copper material clean annealing among protective atmosphere.The utility model adopts the sealing metal inner cover to make annealed material and air is isolated and the formation protective atmosphere, and big air quantity recirculation blower is housed in the furnace chamber, makes shielding gas form the strong convection circulation; Guarantee that temperature is even in the stove, make full use of thermal source, improve heat exchanger effectiveness; Electricity saving and energy saving; Shorten product process period, improve performance of products, suitability is stronger.

Description of drawings

Fig. 1 is the utility model strong convection bell-jar bright annealing oven structural representation.

In the accompanying drawing: the 1-furnace shell; The 2-inner cover; 3-stove seat; The 4-heating unit; The 5-drop-bottom; The 6-reference column; The 7-suspension bracket; The 8-sealed electric-motor; The 9-sealing-ring; The 10-blower fan; The 11-locating sleeve; The 12-locating sleeve; The 13-furnace lining; The 14-burner hearth; The 15-furnace chamber.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further, following examples are said only to be the example as the utility model practical implementation, but not the restriction that the utility model is done.

Shown in accompanying drawing, the utility model strong convection bell-jar bright annealing oven comprises base, stove seat 3, inner cover 2 and furnace shell 1; Said furnace shell 1 and inner cover 2 rounded bell shape, said furnace shell 1 fixedly cover cap form burner hearth 14 on base; The furnace lining 13 that is fixed on week in the furnace shell 1 adopts full fiber pure aluminium silicate Nomex folded piece to combine, and has alleviated the weight of furnace shell 1 cover body so greatly, has not only improved heat insulation effect but also has reduced energy consumption; Heating unit 4 is the ferrochrome exothermic resistive band, and is fixed on the furnace lining 13 with ceramic screw, and is not only firm but also durable; The ring flange that said inner cover 2 is provided with through the bottom is fixed on the base within the burner hearth 14, is fixed with sealing-ring 9 between the ring flange of said inner cover 2 and the base, to form the furnace chamber 15 of sealing; Said stove seat 3 is fixed on the base within the furnace chamber 15; In said stove seat 3 inner chambers, also be fixed with the blower fan 10 that drives through sealed electric-motor 8, stove seat 3 is provided with air outlet; So that blower fan 10 can form convection circulation with air in the furnace chamber 15, the drop-bottom 5 that is fixed on stove seat 3 tops can hold in the palm the lining annealing workpiece.Also be fixed with reference column 6 on the said base, said furnace shell 1 is respectively equipped with locating sleeve 11 and locating sleeve 12 with inner cover 2, and said furnace shell 1 overlaps and locating sleeves 12 through locating sleeve 11 with inner cover 2, is inserted in from reference column 6 upper ends, positions.

During work; Be placed at annealing workpiece in the furnace chamber 15, at first through vacuum pump furnace chamber 15 vacuumized, 75% hydrogen and the 25% nitrogen mixture body that ammonia destruction furnace are produced charge into furnace chamber 15 again; Form protective atmosphere; According to the workpiece of differing materials, protective atmosphere also can adopt the mixed gas of 97% nitrogen and 3% hydrogen, or purifying hydrogen and nitrogen.Annealed material is in whole heating, process of cooling among low dew point, the low oxygen containing gas shield all the time, guarantees clean, the non-oxidation of workpiece surface-brightening in heat treatment process.Owing in the stove big air quantity blower fan 10 is housed, make protective atmosphere form the strong convection circulation, make furnace chamber 15 interior temperature even, each temperature can make annealed material obtain more consistent mechanical and physical performance in ± 5 ℃.

Except that the above, the utility model can also have other embodiments, this not superfluous one by one stating.In every case adopt the technical scheme that is equal to replacement or equivalent transformation formation, all belong to the protection domain of the utility model requirement.

Claims

1. a strong convection bell-jar bright annealing oven comprises base and furnace shell (1), said furnace shell (1) fixedly cover cap on base; Form burner hearth (14), interior week of said furnace shell (1) is fixed with furnace lining (13), and heating unit (4) is fixed on the furnace lining (13); It is characterized in that, also comprise inner cover (2) and stove seat (3), the ring flange that said inner cover (2) is provided with through the bottom is fixed within the burner hearth (14) on the base; Be fixed with sealing-ring (9) between the ring flange of said inner cover (2) and the base; Forming the furnace chamber (15) of sealing, said stove seat (3) is fixed within the furnace chamber (15) on the base, in said stove seat (3) inner chamber; Also be fixed with the blower fan (10) that drives through sealed electric-motor (8), said stove seat (3) is provided with air outlet.

2. according to the said a kind of strong convection bell-jar bright annealing oven of claim 1; It is characterized in that; Be fixed with reference column (6) on the said base; Said furnace shell (1) and inner cover (2) are respectively equipped with locating sleeve (11,12), and said furnace shell (1) and inner cover (2) are enclosed within on the reference column through locating sleeve (11,12) and position.