High-temperature vacuum furnace heating chamber

Abstract

The invention discloses a high-temperature vacuum furnace heating chamber. The high-temperature vacuum furnace heating chamber comprises a cylindrical stainless steel outer shell, an upper thermal insulation screen, a side thermal insulation screen and a lower insulation screen, wherein the upper thermal insulation screen, the side thermal insulation screen and the lower insulation screen are arranged in the outer shell; a plurality of lead-out notches used for positioning a heater are formed in the side wall of the outer shell and the side thermal insulation screen; through-feeding openings are formed in the bottom of the outer shell and the lower thermal insulation screen; a moveable stainless steel plate is arranged in the feeding openings; the moveable stainless steel plate is provided with a moveable thermal insulation screen; a material-placing seat is arranged on the moveable thermal insulation screen; each thermal insulation screen comprises a plurality of thermal insulation single layers; the thermal insulation single layers respectively are a tungsten thermal insulation piece, a high temperature molybdenum thermal insulation piece and a molybdenum thermal insulation piece; cushion blocks are respectively arranged among the thermal insulation pieces; and the thermal insulation pieces are integrally connected by a tungsten pull rod and are fixed on the outer shell through an insulating ceramic ring at the end of the tungsten pull rod. The high-temperature vacuum furnace heating chamber is suitable for a high-temperature high vacuum environment, has small deformation after the temperature being raised, and has convenient use and long service life.

Description

technical field [0001] The invention belongs to the field of high-temperature vacuum, in particular to a heating chamber of a high-temperature vacuum furnace. Background technique [0002] Commonly used high temperature vacuum furnace heating chamber structure such as figure 1 As shown, it includes a stainless steel casing, an upper insulation screen and a side insulation screen arranged in the casing, a number of lead-out gaps for positioning the heater are arranged on the side wall of the casing and the side insulation screen, and the bottom wall of the casing is movably arranged on the casing body. The lower insulation screen is set on the bottom wall of the shell. Each insulation screen includes several insulation layers. Nuts are secured to the stainless steel housing. [0003] Its disadvantages are: since the bottom wall of the shell is movably arranged on the shell body, and the lower insulation screen is arranged on the bottom wall of the shell, the entire bottom w...

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Problems solved by technology

[0003] Its disadvantages are: since the bottom wall of the shell is movably arranged on the shell body, and the lower insulation screen is set on the bottom wall of the shell, it is necessary to open the entire bottom wall of the shell and the lower insulation screen when feeding and discharging, which is easy to damage the lower insulation screen

And the heat preservation screen is directly fixed on the shell of the heating chamber with tungsten tie rods through nuts. After the temperature rises, the heat deformation of the heating chamber is large, and the nuts cannot effectively fix the tungsten tie rods, which makes the heat preservation screen sag more, which has a great impact on the temperature uniformity in the furnace. , and it is easy to short-circuit with the heater, causing equipment failure, so the heating chamber of the high-temperature vacuum furnace with this structure cannot work effectively for a long time in a high-temperature environment

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