SU1441144A1 - Shaft furnace muffle - Google Patents

Abstract

The invention relates to a muffle of a shaft furnace for thermal and chemical heat treatment. The aim of the invention is to increase the durability of the muffle, ensuring flatness to accommodate the base plate. The muffle includes a housing 1, V-shaped liners (B) 3-5. The cage is mounted on a base plate 6 placed on B. In 3-5, the top is placed freely in the muffle on the side walls of the housing. By eliminating welded grooves, the liners, under the influence of temperatures, breathe and take on a comfortable shape without causing large deformations leading to the destruction of the structure. 1 h. n. f-ly, 5 ill.

Description

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The invention relates to furnace equipment used for thermal and chemical heat treatment.

The purpose of the invention is to increase the durability of the muffle, ensuring flatness for placing the base plate.

FIG. 1 shows a muffle of a shaft furnace, a general view in section, FIG. 2 the same, without a flap, - top view; in fig. 3 - lower liner; in fig. 4 - middle liner; in fig. 5 - upper liner.

The muffle of the shaft furnace has a housing 1 with a bottom 2 and liners 3, -5 and a support plate 6. Each subsequent insert has spacers 7 of different thickness and providing a single plane for the support plate 6.

The inserts are installed during installation. The number of inserts can be any two. In this case, the number of liners is three.

The muffle works as follows.

Inserts 3-5 are mounted one on the other, and the base plate 6 is freely placed on top. The products are loaded onto the base plate. The muffle is installed in the oven, which is turned on and heated to the required temperature.

After the end of the technological process, the products are removed, the liners 3-5 with the base plate 6 remain in the muffle, and the next charge is loaded onto the base plate 6.

Cage set on the base plate 6, not welded to the muffle. In this way, welds are eliminated, and liners under the influence of temperature breathe and take on a comfortable shape without causing large deformations, leading to structural failure.

The muffle is needed in a muffle furnace to create the necessary controlled environment. The muffle together with the furnace lid forms a closed working chamber in which you can create the necessary environment for the technology.

The base plate 6, on which the basket with small parts or large parts is mounted, rests on the inserts 3-5 freely, without welding. The rims of all inserts are loosely attached to the muffle casing. When exposed to a mass of parts on the support plate, the muffle case is pa-. It works only in compression, since its lower part is installed on the stand, and the upper KpOMJ a perceives the charge through the inserts.

The lack of welds between the liners and the housing, as well as between the base plate and liners increases the service life of the muffle.

Claims (2)

1. A muffle with a kiln oven, comprising a case in the form of side steaks and bottoms, characterized in that, in order to increase the durability of the muffle, it is equipped with a base plate and V-shaped liners mounted at the ends on the side walls of the muffle, and in the middle connected to the base plate . 2. The muffle according to claim 1, characterized in that, in order to ensure flatness for placing the base plate, it is provided with spacers attached to the bottom of each subsequent liner, wherein the thickness of the spacer of each subsequent liner is equal to the sum of the thicknesses of the previous liners. about Fi.e (P about fn)  -and / g. - / r Phie. n