JPS5854635Y2 - Furnace support structure for heater embedded refractory molded body - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an in-furnace support structure for a refractory molded body embedded in a heater.

In recent years, so-called heater-embedded refractory molded bodies, which are formed by embedding heating wires in a refractory molded body, have come into widespread use in various heating furnaces.

This type of refractory molded body buried in a heater is generally attached to the furnace outer wall at an appropriate distance, and a backing material made of a refractory heat insulating material is inserted between the molded body and the furnace outer wall. The end of the heating wire is led out of the furnace through the backing material and the outer wall of the furnace, and is heated by electric power.

When using a heater-embedded refractory molded body for this type of application, the molded body and backing material may be deformed due to heating and cooling during use, resulting in accidents such as damage to the molded body or breakage of heating wires. There was a problem that could easily occur.

In view of the above, the present invention was made with the purpose of providing a support structure for a heater-embedded refractory molded body that can prevent damage to the heater-embedded refractory molded body and breakage of heating wires.

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

In FIG. 1, a heater-embedded refractory molded body 1 has, for example, an electric resistance heating element 3 embedded in a ceramic fiber molded body 2, and the heater-embedded refractory molded body 1 has a diameter on the surface side at an appropriate location. A stepped hole 4 larger than that on the side is provided.

Reference numeral 5 denotes a furnace outer wall, and stud pins 6 of a predetermined height are erected inside the furnace outer wall 5 to maintain a constant distance between the furnace outer wall 5 and the heater embedded refractory molded body 1.

In addition, the stepped hole 4 of the heater embedded refractory molded body 1 of the furnace outer wall 5
A pipe 7 is fixed through the outer wall of the furnace at a position facing the furnace, and insulating bushings 8, 8' are attached to both the inner and outer sides of the pipe 7.

Reference numeral 9 denotes a support pin, which has an enlarged portion 10 at one end and a male threaded portion 11 at the other end, and is attached through the stepped hole 4 of the heater embedded refractory molded body 1 and the insulating bushings 8, 8' of the pipe 7. ing.

Here, the enlarged part 10 at the end of the support pin 9 is locked to the stepped part of the stepped hole 4, and a nut 12 is screwed into the male screw 11 at the other end, and the insulating bush 8' of the nut 12 and By interposing the spring 13 in a compressed state between them, the heater-embedded refractory molded body 1 is pulled toward the outside of the furnace, and its back surface is pressed against a part of the tip of the stud pin 6, thereby connecting the heater-embedded refractory molded body and the furnace. The distance from the outside wall is maintained.

Further, a hole 14 for leading out a power supply terminal is formed in the outer wall 5 of the furnace, and a power supply end 16 is led out through an insulating bushing 15 provided in the hole 14.

Here, interposing a spring 18 with a weak spring force as shown in the figure between the end fixing piece 17 at the end of the power supply terminal 16 and the insulating bushing 15 also alleviates the external force acting on the heating element and prevents the occurrence of wire breakage. A refractory heat insulating material 19 such as ceramic fiber is inserted into the space between the heater embedded refractory molded body 1 and the furnace outer wall 5, which may be effective in preventing this.

In the embodiment described above, the heater-embedded refractory molded body 1 is elastically supported by being pulled by a spring 13 via a support pin 9.

Therefore, the deformation caused by heating and cooling of the spring 1
3, it is effectively absorbed, thereby preventing damage to the refractory molded body embedded in the heater and breakage of the heating wire.

Further, the support pin 9 is supported by insulating bushes 8, 8' attached to both ends of the pipe 7 at a distance.

Therefore, even when the heater 1 is installed vertically as shown in the figure, the refractory molded body embedded therein does not fall off and is stably supported.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention. In the figure: 1... Heater embedded refractory molded body, 2...
...Refractory molded body, 3... Heating wire, 4...
...Stepped hole, 5...Furnace outer wall, 6...
・Stud pin, 7...Pipe, 8, 8'...
...Insulating bushing, 9...Support pin, 10
......Enlarged part, 11...Male thread part, 12
...Natsuto, 13...Spring, 1
6...Power supply terminal, 19...Fireproof insulation material.

Claims (1)

[Scope of utility model registration request] A pipe 7 fixed to the furnace outer wall 5 and having insulating bushings 8, 8' at both ends, a stud pin 6 erected inside the furnace outer wall 5, and a buried heater whose back surface is in contact with the tip of the stud pin 6. It comprises a refractory molded body 1, a support pin 9 whose one end is locked to the molded body 1 and is provided through the insulating bushings 8, 8', and a spring 13 that pulls the support pin 9 toward the outside of the furnace. Features an in-furnace support structure for a heater-embedded refractory molded body.