Heating – Heating or heat retaining work chamber structure
Patent
1989-01-26
1990-09-11
Yuen, Henry C.
Heating
Heating or heat retaining work chamber structure
110332, 110336, 110340, 432250, F27D 100
Patent
active
049558099
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a lining element for heat treatment furnaces. This invention relates also to a lining structure containing lining elements.
It is a known practice to provide lining structures which are used for thermal insulation purposes in industrial heat treatment furnaces. These structures are fastened to the interior wall of the furnace and in their innermost layer, that is the layer closest to the interior of the furnace, the fibers are mainly directed parallel to planes which are perpendicular to the interior furnace wall. The elements, which are installed at the layer, consist of fibrous plates disposed one after the other and situated perpendicularly to the interior furnace wall The plates are pierced by means of supporting a element, with which the lining element is fastened to the furnace. This ensures, that the fibers will not become easily detached from the lining. Moreover, the supporting elements serving as the fastening means, are situated within the fibers and they are not exposed to deteriorative circumstances within the furnace. Between the element and the interior furnace wall, a layer can be provided, which contains less expensive and thermally less resistant fibers, such as ceramic fibers or mineral wool.
The structure described hereinabove is disclosed by DE-OS No. 35 33 982. The elements shown by this publication comprise a supporting element piercing the insulating material consisting of ceramic fibers, and a plate welded to one end of the supporting element and provided with a flange. The element can be secured to the interior furnace wall or to a support projecting from the interior furnace wall by means of screws at the location of the flange. The said plate is also provided with a hole, into which the end of the supporting element in the next element can be inserted when the element is mounted at its place. The structure of these elements has some disadvantages, which makes their use and installation cumbersome. The free end of the supporting element piercing the insulating material does not very firmly hold the fibrous plates in their places, for example, during the transport of the elements. For this purpose a stopper must be provided, which causes difficulties when mounting the elements. Further, the fastening plate at the other end of the supporting element is inconvenient, because attaching it by means of screws to the interior furnace wall or to a specific fixing means provided thereon is time-consuming and difficult.
SUMMARY OF THE INVENTION
The present invention makes it possible to eliminates the above discussed disadvantages due to the structure of the lining element in accordance with the invention is mainly characterised by the features. Present invention means at both ends of the supporting lining element piercing the insulating material, and these means extend transversely in relation to the supporting element. Using these fastening means, the elements can be secured at the ends of the fastening means onto the interior furnace wall in a single operational stage. In case the insulating material is formed of fibrous plates, the fibrous plates are firmly held in the element as the fastening means compress them therebetween and the element can be fastened at the wall.
The ends of the fastening means can be, for example, shaped so that they can be pushed in a single motion into the supporting means provided on the interior furnace wall.
The lining structure in accordance with the invention, eliminating the previously discussed disadvantages of the lining elements of the prior art, are characterised by the features disclosed in art includes the projections at the ends of the fastening means of the elements and the fastening means projecting from the interior furnace wall and being suitably shaped, such as to facilitate installation work.
The invention will be explained in more detail in the following description, where reference is made to the appended drawings, wherein
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspectiv
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