CN202201942U

CN202201942U - Inner cover for all-hydrogen cover type annealing furnace

Info

Publication number: CN202201942U
Application number: CN201120216661XU
Authority: CN
Inventors: 仇文秋
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-24
Filing date: 2011-06-24
Publication date: 2012-04-25
Anticipated expiration: 2021-06-24

Abstract

The utility model relates to an inner cover for an all-hydrogen cover type annealing furnace. The inner cover for the all-hydrogen cover type annealing furnace comprises a housing, wherein a guide cover is arranged inside the housing by a suspension device; a plurality of guide holes are uniformly distributed on the guide cover. Protective hydrogen gas enters from the bottom part of a gap between the housing and the guide cover and moves upwards in an annealing process until reaching the top part of the housing, and then forms convective circulation under the action of an air blower for protecting a steel coil and a wire rod, thus the temperature uniformity of the furnace is improved, and every mechanical performance of the annealing material is ensured to reach the standard requirement. Simultaneously, one part of hydrogen gas directly enters a working region from the guide holes to avoid a blind region where the hydrogen gas cannot reach between layer and layer, thus the working efficiency of the thermal treatment is further improved. The product is widely applicable to the all-hydrogen cover type furnace for annealing a plurality of stacks of steel coils and wires.

Description

Full-hydrogen hood-type annealing furnace is used inner cover

Technical field

The utility model relates to a kind of bell type annealing furnace, relates in particular to a kind of full-hydrogen hood-type annealing furnace and uses inner cover.

Background technology

In recent years, along with market to the sheet material of ferrous metal and non-ferrous metal clean annealing, the continuous increase of wire rod demand, and these sheet materials, wire rod in production process often with the form transmission of rolling; Its thermal treatment mainly relies on bell type annealing furnace for a long time, and present state-of-the-art technology is to adopt the perhydro strong convection bell type furnace to handle, and in carrying out the annealed process, needs to feed hydrogen material is protected; Make it not oxidized; Surface-brightening, and improved heat transfer efficiency, thus improved anneal capability; Also guarantee temperature uniformity, guaranteed the mechanical property of coil of strip and wire rod.For this reason, when on table, stacking coil of strip or wire rod, must coil of strip and heating mantles be separated with inner cover; Hydrogen gets into along the space of coil of strip and inner cover from the bottom margin of inner cover and rises, and moves down from the centre hole of coil of strip or the gap of wire rod then, in the bottom of table explosion-proof fan is installed; Utilize blower fan to form the convection circulation of gas up and down, make whole inner cover form a gaseous exchange passage, guarantee that temperature is even in the stove; Because each big steel mill reduces production costs in order to enhance productivity at present, when the design bell furnace, require the space in the bell furnace enough big; When stacking coil of strip or wire rod, adopting isosceles triangle or quincunx stacking, staggers each other in every layer of position, and the centre hole of the coil of strip of levels is not on same axis like this; When using original inner cover, hydrogen is after the bottom margin entering of inner cover, and most of hydrogen moves down from the coil of strip center of bottom; The hydrogen shield that obtains to the upper strata so more is few more, and product annealed effect is reduced greatly, has influenced the quality of product.

The utility model content

The purpose of the utility model has overcome deficiency of the prior art exactly, provides a kind of novel full-hydrogen hood-type annealing furnace simple in structure, that water conservancy diversion is effective to use inner cover.

The utility model is achieved in that a kind of full-hydrogen hood-type annealing furnace uses inner cover, comprises case, and it is characterized in that: the inside at said case is equipped with pod through suspension chain.

The utility model compared with prior art has following advantage:

1. owing to adopted pod; Protection hydrogen gets into along bottom, the space between case and the pod and moves up in annealing process, moves to the top of case always, and the effect at blower fan forms convection circulation up and down then; Coil of strip and wire rod are protected; Improve temperature uniformity, guaranteed each item mechanical property of institute's annealed material, reached standard-required.

Since on pod uniform distribution several pod apertures, a part of hydrogen directly gets into the WS from pod apertures, avoid layer with layer between the blind area that hydrogen can't arrive appears, further improve heat treated work efficiency.

3. because the pod housing is thinner, progressively adopt reinforcement during design, both improved the intensity of pod, guaranteed heat transfer property again.

Description of drawings

Fig. 1 is the utility model structural representation;

⒈ case ⒉ pod 3. pod apertures 4. table ⒌ stiffening web ⒍ suspension systems.

Embodiment

Following examples are used to explain the utility model, but are not used for limiting the scope of the utility model, and all technical schemes that are equal to also belong to the category of the utility model, and the scope of patent protection of the utility model should be limited each item claim.

As can beappreciated from fig. 1, a kind of novel full-hydrogen hood-type annealing furnace is used inner cover, comprises case 1, it is characterized in that: the suspension system 6 in the inside of said case 1 through its top is equipped with pod 2.

Several pod apertures 3 of uniform distribution on said pod 2.

In order to improve the intensity of pod 2, on pod 2 uniform distribution some stiffening webs 5.

Claims

1. a full-hydrogen hood-type annealing furnace is used inner cover, comprises case (1), it is characterized in that: the suspension system (6) in the inside of said case (1) through its top is equipped with pod (2).

2. full-hydrogen hood-type annealing furnace according to claim 1 is used inner cover, it is characterized in that: go up several pod apertures of uniform distribution (3) at said pod (2).

3. full-hydrogen hood-type annealing furnace according to claim 1 is used inner cover, it is characterized in that: go up some stiffening webs of uniform distribution (5) at said pod (2).