JPS58102482A - Infrared ray heating furnace - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to an infrared heating furnace suitable for obtaining ultrahigh temperatures.

Conventionally, a type of heating furnace is known that is equipped with two elliptical reflectors and an infrared heater placed at the focal point of the reflector to heat an object in front of the reflector.
It is made up of a coiled tungsten sealed in the inner part 11 together with, for example, halogen gas, and according to K, it has a diameter of about 15
Although it is possible to obtain a furnace temperature of around 00°C, there are six drawbacks: it is not possible to obtain a furnace temperature higher than that, such as 2000°C.

In other words, the tungsten wire of the heater has a relatively high melting point and can withstand high power input, but the quartz tube surrounding it loses its transparency as the furnace temperature increases, and as the temperature increases, the tungsten wire itself becomes crystallized. As the quartz tube progresses, the entire quartz tube softens and becomes easily deformed, and the dead tungsten wire is explosively welded to the molybdenum plate at the end of the heater, and is led out through the nickel wire, causing a connection with the outside. The sealing part is pinched off between the molybdenum plate and the quartz glass on both sides, and as the edge becomes hot, the quartz glass expands and contracts differently in the molybdenum plate, causing oxygen to diffuse in from the outside. The inconvenience of oxidative deterioration of the molybdenum plate is a factor in not being able to achieve an extremely high furnace temperature.

The object of the present invention is to solve these drawbacks and provide a heating furnace capable of obtaining an ultra-high temperature. In the type that heats the object in front of the reflective surface,
The furnace body is characterized by having nine cooling gas ejection holes for cooling the infrared heater from its outer periphery.

An example of the heating device of the present invention will be explained with reference to the drawings.

In Figures 161 to 3, (1) is the furnace body (1 m) consisting of divided furnace bodies (1 m) that are joined together by illusion and can be opened and closed, and (i) is the inside of the wrinkled body (1). (4) is an elliptical reflection surface consisting of a longitudinal ellipse-face formed in the 311KiJ1. The infrared heater provided at the focal point of the surface (3) is shown, and the # heater (4) is formed by inserting a coiled tungsten wire together with halogen gas into the transparent quartz tube (6) as described above. In addition, (6) is a cooling water circulation path provided in each divided reactor body (11) (1m), and (7) is a cooling water circulation path installed in the core to accommodate the solid object (1) to be heated. The infrared rays emitted from the datater (4) are stored in a quartz protection tube (1).
) and radiantly heats the object (8) inside it.

The above configuration is a 1Fi instead of a conventional infrared heating furnace and 1F#.
In the present invention, the furnace body (1) is provided with the heater (4).
) is provided with cooling air or other cooling gas ejection holes (9) for cooling the heater (4) from its outer periphery, so that the temperature of the transparent quartz tube (A) constituting the heater (4) can be prevented. More specifically, each reflecting surface of the wrinkled furnace body (1) <3) (1) A piping shaft located in the cabinet and connected to the cooling gas source 011 is provided approximately parallel to the heater (4). Middle of heater (4) @(
4a) K is the reflection 1i (3) K is formed and the cooling gas is blown through the 9 cooling gas jet holes (9m), and the heater (4) @1iA (4b) K is the cooling formed in the scissor pipe 01 The piping 01, which is designed so that cooling gas is blown through the gas injection hole (9k), alternately connects the furnace body ( 1) The upper and lower ends of each heater (4) extend outside the furnace II.
(4b) can be cooled, and the difference in expansion and contraction between the quartz tube (5) and the quartz tube (5) can be made small*.

The rings are provided in the middle of the wrinkled pipe 01, and (b) the trout shows the tungsten wire and 4 nickel wires of the heater (4), and the one ring is the quartz protection tube (7). be.

To explain the operation of item 7, the infrared heater (4) K so/
When a large amount of power is applied to raise the temperature of the core to about the melting temperature, the temperature of the core rises to about 200 degrees, and the temperature of the transparent quartz tube (h) of the container (4) rises to about 200 degrees. The quartz tube (1) is cooled by the cooling gas from the cooling gas outlet (9), suppressing the 70 am rise, preventing the softening deformation and crystallization of the quartz tube (1), and the end @ (4b)
The difference in tension and convergence between the quartz tube (M) in K and the internal molywood plate brocade is reduced, and oxidation due to the intrusion of oxygen is prevented.

In this way, when using the WAK of this invention, a cooling gas jet hole for cooling the infrared heater is provided in the furnace body, so a large amount of power can be input and an extremely high temperature can be obtained without damaging the wrinkle heater. It also has the advantage of being relatively simple and inexpensive.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing 111Vt of the heating device of the present invention, Figs. 2 and 3 are cutaway plane views of the 7th 4- and 1st layer wires, and No. 411 is the development inside the furnace @ Akira. It's a complete diagram. (1)...Furnace body (1)...Elliptical reflection-
(4)...Infrared heater (8)...Object (9)
...Cooling gas vent and 2 others

Claims (1)

[Claims] In a furnace body equipped with an elliptical reflective surface and an infrared heater placed at its focal point to heat an object in front of the reflection, the infrared heater is cooled from the outer periphery of the furnace body. An infrared heating furnace characterized by nine cooling gas ejection holes.