JPH0629676Y2 - Insulation material retaining pin for furnace casing - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is a structure of a holding pin when a heat insulating material used in a high temperature region of about 900 to 1300 ° C in a heating furnace or an annealing furnace is attached to a furnace wall surface. It is about.

<Prior Art> As disclosed in Japanese Patent Laid-Open No. 61-153380, conventionally, when attaching a heat insulating material to a furnace wall, as shown in FIG. It is common to weld the to and heat insulating material to it with washers 12 and split pins 13.

Further, in order to adjust the degree of tightening of the heat insulating material, as shown in FIG. 6, make a hole 19 penetrating the iron skin 1, insert a threaded presser pin 15 into this hole, and fix it with a nut 14 from the back side of the iron skin. There is also a structure with.

Further, as shown in FIG. 7, a structure in which the nut 20 is welded 16 to the iron shell 1 and the bolt 18 with the washer 12 and the nut 17 are inserted into the nut 20 is also adopted.

However, these conventional pressing pins have the following drawbacks.

That is, (1) At a high temperature of 900 to 1300 ° C, hook metal fittings and split pins undergo oxidation or thermal deformation, and heat resistant materials (SUS, NiCr materials)
Has a short life and becomes loose due to elongation, which adversely affects the operation.

(2) Even when ceramic is used for the washer material as a measure to extend the life of the heat-resistant material, the hook is deformed and oxidized first, and the life is not so extended.

(3) When the presser pin reaches the end of its life, it is necessary to renew all the parts each time, which makes the labor and cost of the work great.

(4) It is difficult to apply the steel-penetrating type to places where inner and outer seals are required.

Therefore, in order to solve the above-mentioned problems, Japanese Utility Model Laid-Open No. 63-190898 proposes a holding pin structure as shown in FIG. The structure of this retainer pin is a combination of a hook metal 2, a ceramic cap 3, a refractory plug 11, and an amorphous refractory 4. The ceramic 3 and the refractory plug 11 are such that the hook metal is directly exposed to a high temperature environment. In addition, the irregular shaped refractory injected into the gap between the hook metal and the inside of the ceramic cap enhances the antioxidation of the hook metal and the effect of holding the heat insulating material.

However, this presser pin has a threaded portion 10,
Since the strength of this portion is weak, the structure is complicated and it cannot be easily disassembled, and the ceramic 3 is damaged when the plug brick 11 and the amorphous refractory 4 are disassembled, repeated use was not possible. In addition, the ceramic cap was tapered, and a gap was created due to the difference in thermal expansion between the ceramic, the amorphous refractory, and the plug brick, and the filler easily slipped out, causing a sudden trouble. In addition, it was not possible to use it for an upward facing wall such as a ceiling because it was particularly easy to slip out.

<Problems to be Solved by the Invention> An object of the present invention is to provide a heat insulating material retaining pin for a furnace casing that is easy to construct, has a long life, can be used repeatedly, and can be used at any part of a wall. .

<Means for Solving the Problem> The present invention has a ceramic cap having a hollow structure in which a tip end of a hook metal object fixed to a furnace wall of a heating furnace or the like is elastically deformable and the tip end part is elastically deformed. Insulating material for the furnace casing, characterized in that it is forcibly inserted into the opening of the ceramic cap to wrap it, and the hollow part of the ceramic cap can be filled with an irregular shaped refractory from an inlet provided in the ceramic cap. It is a holding pin.

<Operation> In the present invention, (1) the hook hardware is covered with a ceramic cap so that the hardware is not directly exposed to a high temperature atmosphere. For this reason, deformation and oxidation are extremely reduced, and the life is extended.

(2) For the hook hardware, for example, a plate material (steel strip) is bent and used so that it can be inscribed in the ceramic cap by the force of the spring, and the ceramic cap can be firmly attached, and it can be easily removed and used repeatedly. You can

(3) Actively protect the hook hardware, and inject irregular shaped refractory material from the injection port provided in the ceramic cap as a backup so that the hardware does not lose its spring force due to oxidation or creep at high temperatures. Can further extend the service life.

As the ceramic cap material, Al ₂ O ₃ rich ceramic such as 98% is preferable from the viewpoint of protecting the hook, and a thickness of 5 mm or more is preferable because a heat insulating effect can be obtained.

As a way to remove the holding pin when the heat insulating material deteriorates and is replaced, if a light shock is given from outside the ceramic cap, the irregular refractory material is crushed and the cap can be easily pulled out.

After pulling out the cap, it can be used repeatedly by cleaning the inner surface of the cap and the surface of the hook with a wire brush.

Both ceramics and amorphous refractories can be selected so long as they can withstand the ambient temperature. If the temperature exceeds 1000 ° C, alumina is preferable.

<Embodiment> Next, an embodiment of the fireproof heat insulating material retaining pin according to the present invention will be described.
It is shown in FIG.

FIG. 1 is a cross-sectional view of a holding pin according to the present invention. The holding pin is a hook metal 2 welded to a furnace wall iron shell 1, a ceramic cap 3 enclosing the hook metal 2, and an irregular refractory material interposed between the two. It is composed of 4. The ceramic cap 3 is provided with an opening 7 into which the elastic head of the hook metal piece is inserted and an injection port 5 into which the irregular refractory material 4 is injected.

FIG. 2 is a detailed view of the hook metal fitting 2. A thin steel plate (SUS material) having a thickness of 1 mm or less is provided with a bulge 6 so as to have a spring property.

FIG. 3 is a detailed view of the ceramic cap 3, which has an opening 7 so as to cover the above-mentioned hook metal fitting 2 and a brim 8 for pressing the heat insulating material 9. Although the brim 8 depends on the heat insulating material, a suitable overhanging width is 10 to 20 mm. An injection port 5 for injecting the amorphous refractory 4 is provided on the surface of the cap 3, and after attaching the ceramic cap 3 to the hook metal 2, the mortar-shaped irregular refractory 4 is applied to the grease gun. For injection with a mold injector. The amount of injection may be set so that it leaks out a little from the opening 7 of the ceramic cap 3.

As a construction procedure, after the hook metal fitting 2 is welded to the furnace wall iron shell 1 in advance and the heat insulating material 9 is set, the ceramic cap 3
Put on. When mounting, the bulge 6 of the hook hardware 2 is pushed in until the opening 7 of the ceramic cap 3 passes through. After that, the amorphous refractory 4 is injected from the inlet 5 by the above-described method.
Inject. The amorphous refractory 4 is dried and solidified once heated, and is firmly set.

By doing so, the hook metal fitting 2 is protected by the amorphous refractory material 4 and the ceramic cap 3 without being directly exposed to a high temperature. Therefore, the presser pin can achieve a long service life and stable operation of the annealing furnace or the like becomes possible. Further, when the ceramic cap 3 is removed due to deterioration of the heat insulating material 9 or the like, the irregular-shaped refractory 4 is crushed in the ceramic cap 3 when a light impact is applied from the outside, and can be easily removed by pulling out the cap 3 (replacement work Simplification). The cap 3 and the hook hardware 2 can be repeatedly used by caring for them.
In the experiment, there is a protection effect even without the amorphous refractory 4, but the irregular refractory 4 is maintained to maintain the spring characteristics and strengthen the cap mounting.
It is desirable to inject.

Further, the brim 8 of the ceramic cap 3 may be circular or the like without sticking to the corner.

The elastic structure of the tip of the hook metal object is not limited to the embodiment, but a rod-shaped object may be bent, and another structure may be adopted.

<Effect of the Invention> The present invention protects from high temperature atmosphere by covering the hook metal of the heat insulating material holding pin with the ceramic cap and the irregular shaped refractory, and the hook metal has a bulge to make it a spring type. (1) The life of the presser pin can be extended and the operation can be stabilized. (2) The presser pin can be used repeatedly, resulting in cost reduction. (3) Easy replacement and improved workability. (4) Presser pin It is possible to obtain the effect that the part used on the furnace wall is not limited.

[Brief description of drawings]

FIG. 1 is a sectional view of a holding pin according to the present invention, FIG. 2 is an overall view of a hook metal object, FIG. 3 is an overall view of a ceramic cap, and FIG. 4 is a view showing a usage state of the holding pin on a furnace wall, 5th-8th
Each of the drawings is a cross-sectional view showing a usage state of a conventional pressing pin. 1 ... Furnace wall iron skin, 2 ... Hook metal fittings, 3 ... Ceramic cap, 4 ... Amorphous refractory material, 5 ... Injecting port, 6 ... Bulging, 7 ... Opening, 8 ... Brim, 9 ... Fireproof heat insulating material, 10 ... Screw Parts, 11 ... Refractory plugs, 12 ... Washers, 13 ... Split pins, 14 ... Nuts, 15 ... Holding pins, 16 ... Welds, 17 ... Nuts, 18 ... Bolts, 19 ... Through holes, 20 ... Nuts.

Claims (1)

[Scope of utility model registration request] 1. A tip end portion of a hook metal object fixed to a furnace wall of a heating furnace or the like has a structure capable of elastically deforming, and the tip end portion is elastically deformed and forcibly inserted into an opening of a ceramic cap having a hollow structure. An insulating material holding pin for a furnace casing, characterized in that it has a structure such that it can be wrapped around and filled with irregular shaped refractory through an injection port provided in the ceramic cap in the hollow portion of the ceramic cap.