JPS608316Y2 - High temperature anchor stud structure - Google Patents

Description

[Detailed explanation of the idea] This idea is to attach insulating refractories such as refractory fibers and fireproof insulation boards (hereinafter referred to as refractory fibers, etc.) to the furnace walls made of refractory furnace materials in order to improve the heat insulation properties of various existing furnaces. Relating to the fixed installation of high temperature anchor studs, 1300
To provide a high-temperature anchor stud structure that does not lose strength for a long time even at high temperatures of .degree. C. or higher, has less heat loss than conventional heat-resistant metal studs, and is easy to handle and construct.

Recently, especially from the viewpoint of energy saving, a heat insulating layer made of refractory fiber or the like is attached to the furnace wall made of a refractory furnace material in various existing furnaces to improve the heat insulation properties of the furnace.

Conventionally, this mounting method uses heat-resistant metal studs, and ceramic fasteners are used on the inner surface of the furnace to protect them at high temperatures.

However, the operating temperature is at most 1200 to 1300°C, which is insufficient for use in ultra-high temperature ceramic fibers that can withstand up to 1600°C.

As a result, so far there has not been anything that can be effectively and easily used as a fixture for refractory fibers and the like for high temperatures exceeding 1300°C.

This idea was made to solve the above problem, and it is a fixture made of high-strength ceramics such as alumina, zirconia, silicon carbide, and silicon nitride, and is made of anchors, washers, nuts, etc. It has a high-temperature anchor stud structure that has sufficient strength and is easy to handle and install.

To explain this idea with reference to several illustrated examples, in FIG.
If the furnace wall is made of bricks, make a hole in the center of the bricks)
Then, using a grinder or the like, a hole 2 having an L-shaped, T-shaped or wide-end cross section is formed.

A ceramic slit-shaped anchor 4 is inserted into the hole, the cavity of the hole is filled with a filler 9 with low fluidity (for example, a bulk of refractory fiber, a patching material, etc.), and the anchor 4 is attached to the furnace wall 1.
Fixed installation.

A refractory fiber etc. 3 is passed through the thread at the other end of the anchor 4, and is attached to the furnace wall 1 using a ceramic washer 7 and a nut 8.

In Fig. 3, a ceramic L-shaped pipe equipped with a ceramic ring 6 as a fixing aid is inserted into a hole 2 made in the furnace wall 1 in the same way as in Fig. 1, and the inlet of the hole 2 is filled. Fill the material 11 with the fire-resistant material 10 from the other end of the pipe 5.
is filled into the hole 2 and fixedly installed on the furnace wall 1.

Several holes are drilled in the pipe 5 to improve the flow of the press-fitting material into the hole 2.

Note that the ceramic ring 6 is an auxiliary tool that firmly fixes the anchor 5 to the furnace wall by engaging the hardened press-fitting material.

After fixing the anchor by hardening the press-fit material, fireproof fibers 3 are attached in the same manner as in FIG. 1.

Fire resistance raw material 10 is highly fluid, self-hardening or 10
It hardens at temperatures below 0'C, has good sinterability, and has sufficient strength at high temperatures for fixation.

The high temperature anchor stud structure according to this invention has the following effects.

(1) Compared to the conventional use of heat-resistant metal studs, there is no risk of deterioration due to oxidation at high temperatures, and it can be used safely for long periods of time even at high temperatures of 1300°C or higher.

(2) Since it has lower thermal conductivity than heat-resistant metals, heat loss from the stud can be reduced.

(3) It is fixedly installed so that it engages with the furnace wall, so it can be firmly joined.

This idea can be applied not only to atmospheric furnaces but also to melting furnaces if it is used to attach refractory boards, monolithic refractory blocks, etc.

[Brief explanation of drawings]

1 and 3 are longitudinal sectional views of an embodiment of the present invention installed on the furnace wall, FIG. 2 is a sectional view taken along line XX' in FIG. FIG. 1... Furnace wall, 2... Hole, 3...
・Fireproof fiber, 4゜5...Ceramic anchor, 6...Ceramic ring, 7...
Ceramic washer, 8...Ceramic nut, 9, 11...Filling, 10...
・Press-in material.

Claims (2)

[Scope of utility model registration request] (1) An L-shaped ceramic rod-shaped anchor is inserted into a hole with an L-shaped, T-shaped, or wide-end cross section drilled in the furnace wall, and the gap in the hole is filled with filler. A high-temperature anchor stud structure that is fixedly installed and an insulating refractory material such as fireproof fiber or fireproof insulation board is attached to the threaded part of the other end of the anchor, a ceramic washer, and a nut. (2) The high-temperature anchor stud structure according to claim 1, wherein the ceramic rod-shaped anchor is a single-shaped pipe with a ceramic ring near the bent portion.