JPH071024A - Heat insulating cover member with heat resistance - Google Patents

Abstract

PURPOSE:To reduce the thermal deformation, to improve the life and to reduce the weight of a heat insulating cover by laminating the heat insulating material and the metallic foil in this order onto a structural member, and fixing the metallic mesh outside the lamination. CONSTITUTION:A ceramics felt 3 where five layers of the cloth of about 2mm in thickness are laminated is provided on a structural member 2 of a steel frame with keeping the space, the stainless steel foil 4 of 50-250mum in thickness and the metallic mesh 5 are laminated thereon, and fixed by bolts 6. As a whole, the heat insulating cover is of the U-shaped section to cover the articles to be heat insulated. This constitution improves the life of the heat insulating stock which is affected by water, etc., reduces the cost for maintenance and dispense with the space for spare parts. The metallic part consists of the mesh and the foil, and is resistant against the rapid heating/cooling, and not affected by the single passage of a hot slab or plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat resistant heat insulating cover member.

[0002]

2. Description of the Related Art In a metal rolling process, a slab that has been uniformly reheated by a heating furnace is transferred by a transfer roll to remove scale generated on the surface, and then roughly rolled to perform width matching and the like. Then, it is rolled to a required thickness. On this occasion,
At the front of the rolling roll in the traveling direction, the traveling speed is fast because it is thinned by rolling, but at the rear it is relatively slow.

In order to keep the temperature applied to the rolling rolls as constant as possible, a so-called delay table requires a heat retaining cover for preventing heat radiation during this period.

[0004] Conventionally, as the heat insulating cover in front of the rolling roll, a structure member (steel frame) covered with a combination of a ceramic fiber felt and a rock wool fiber felt with a stainless steel plate and fixed is used. It was The ceramic fiber has a thickness of 50 to 250 mm, and the steel plate has a thickness of about 2 to 3 mm.

This stainless steel plate is for protecting the ceramic from water. In the rolling process, so-called descaling is performed with high-pressure water in order to remove scale before rough rolling. Also, a large amount of water is used in the rolling device for cooling the rolls. This water causes the fibrous material of the ceramic fibers to fall off, and the heat insulating effect at that portion is reduced. A stainless steel plate is used to prevent the fibers from falling off.

[0006]

However, in this conventional cover member, the stainless steel plate is often deformed because the stainless steel plate is splashed with water or periodically exposed to a high temperature. Further, since the stainless steel plate is thick, its deformation may apply an unreasonable force to the fixing bolts and the like, and the bolts and the like may be detached because they have already been oxidized and consumed. Water enters through the gaps and eventually the fibers flow out. This is a serious problem that can lead to product lot-out.

Further, when the fibrous material flows out, the thickness of that portion is reduced, the heat insulation is lowered, the heat retaining effect is reduced, and eventually the structural member is thermally deformed, so that it cannot function as a heat retaining cover. .

Even in the transfer line of a steelmaking factory, there is a problem that the heat insulating material of the cover is dropped or the bolts are dropped due to the cooling water of the pinch roll or the transfer roll.

[0009]

The inventors of the present invention have completed the heat insulation cover of the present invention as a result of earnest research in view of the above-mentioned various points. The feature of the heat insulation cover is that a structural member, a heat insulating material, The point is that the metal foils are laminated and fixed in this order.

Here, the structural member is for suspending and holding the heat insulating material, and is for holding the heat insulating material and the hot steel plate as close as possible on the transfer line. Usually it is steel. Not only the conventional plate-like and cover-like ones but also a lattice-like one in which pipes and square members are combined.

The heat insulating material may be any material, but may be the above-mentioned felt-like ceramic fiber. Further, a so-called ceramic cloth laminated with woven ceramic fibers is suitable because there is very little loss and outflow of fibrous material, and it has a greater heat insulating effect than the felt-like one, so it can be made very thin. it can.
Usually, about 5 layers of cloth having a thickness of about 2 mm are laminated. The felt requires a thickness of 50 mm in order to obtain the same heat insulating effect as 2 mm, and the weight is 6.5 kg per square meter, and the cloth is 1 kg. This also makes it possible to reduce the weight considerably.

The structural member and the heat insulating material may be fixed in close contact with each other, but a space may be provided between the structural members and the heat insulating material, and the structure member may be fixed in place by a bolt or the like. In this case, air can be circulated in the space for cooling, and heat conduction to the structural member can be further blocked.

The metal foil is used to prevent the fibers from falling and flowing out, and the material may be heat resistant. For example, there are alloys of iron, chromium, aluminum, Inconel, and the like. The thickness is 10 to 1000 μ, particularly 50 to 250
μ is preferred, but is not particularly limited.

The metal mesh is a metal mesh formed by knitting or twisting a metal and naturally has no airtightness, but the metal mesh above it is held as a whole. The diameter of the metal itself is
About 0.5 to 2.5 mm is suitable. Such a net shape does not undergo thermal deformation as a whole. This is because, even if each one is deformed by heat, it is absorbed as a whole because it is knitted or twisted. As the material,
Stainless steel (SUS 310), iron-chromium alloy, Inconel, etc.

The metal mesh itself is not essential, but it is effective as a holding member in the case where various dropouts, curls or the like occur.

The above laminated material may be fixed to the structural material with a fixing tool such as a bolt. This method is remarkably convenient as compared with the conventional method, and may be appropriately suspended on the structural material.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view showing an example of the cover member 1 of the present invention. Ceramic felts 3 are provided at intervals on a structural member 2 made of steel, a stainless foil 4 and a metal mesh 5 are laminated and fixed with bolts 6.
As a whole, it has a U-shaped cross section so as to cover an object to be heated (not shown). The structural member 2 is connected to other supporting tools, driving devices, and the like.

FIG. 2 is a partial sectional view showing another example of the cover member 1 (the structural member is omitted) of the present invention. Figure 1
5 layers of ceramic cloth 7 (Valcon cloth (trade name, manufactured by Imae Kogyo Co., Ltd.)) are laminated instead of the ceramic fiber (felt).

FIG. 3 is a sectional view showing an example of a method for connecting the heat insulating material portion and the structural member. In this example, the structural member 2 and the heat insulating material are indirectly fixed, not directly.
First, heat insulation materials (ceramic cloth and metal foil, etc.)
It is fixed to the trough-shaped member 8 with bolts 9
Is rotatably attached. The core rod 9 and the structural member 2
Is fixed again with bolts. In this case, the thermal deformation of the heat insulating material is not directly transmitted to the structural member, so that the structural member 2 is hardly deformed. As a result, the life of the structural member which is troublesome to replace is significantly extended.

[0020]

As described above in detail, the cover member of the present invention has the following various advantages. Since the thermal deformation is very small, the life of the heat insulating material due to the influence of water etc. is significantly longer than the conventional one. Saves maintenance costs and spares space is not needed. The overall shape stability is significantly improved because there is no heat-deformable member or the member is one whose influence is negligible. Since the metal part is made of mesh and foil, it is resistant to rapid heating and quenching, and is not affected by the single pass of high temperature slabs or thick plates. The metal foil in the middle prevents the infiltration of water, so there is no outflow of heat insulating material, and the one made of ceramic cloth is
Hardly affected. By using the foil, the hot temperature of the foil immediately increased due to the approach of the hot steel sheet, and the absorption of radiant heat from the hot steel sheet was significantly reduced. This is a great effect brought about by weight reduction. This means that conventional structural materials used thick ones for safety, but since the heat insulating material is stable, the structural material itself only has to play the role of suspending its own weight. It is possible to give a function equivalent to that of the conventional one with a combination of wood and timber. Overall, the lighter weight has broadened the path to heat insulation covers that work in conjunction with other mobile devices.
There is no space in the place where such a heat insulation cover is used,
I didn't have the idea to move the weight cover, but this made it relatively easy to move, and also made it possible to change the height depending on the product.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a heat insulating cover of the present invention.

FIG. 2 is a partial cross-sectional view showing another example of the heat insulating cover of the present invention.

FIG. 3 is a partial cross-sectional view showing a method of connecting a structural member of the heat insulating cover of the present invention and a heat insulating material.

[Explanation of symbols]

 1 Thermal insulation cover 2 of the present invention 2 Structural member 3 Ceramic fiber felt 4 Metal foil 5 Metal mesh 6 Bolt 7 Ceramic cloth

Claims (3)

[Claims] 1. A heat resistant heat insulating cover member comprising a structural member, a heat insulating material and a metal foil laminated and fixed in this order. 2. The heat resistant heat insulating cover member according to claim 1, wherein a metal mesh is laminated and fixed on the outside of the metal foil. 3. The heat resistant heat insulating cover member according to claim 1, wherein the heat insulating material is made of ceramic cloth.