DE2433063B1 - Charging port closures in furnaces for ceramics - has heat resisting insert stopper with isolating material at its lower end - Google Patents

Abstract

Charging ports for open tops in plastic for ceramic furnaces with lance type burners are stoppered with an isolating material in the form of a compact isolation insert (11) which fits into the charging port hole (3). The isolation insert (11) is joined to a support framework (13) which is mounted on the charging port lid (10) which carries the whole stopper insert (9). A hand rail (12) or clamping screw connects the isolating insert (11) with the support frame (13). The isolation insert (11) may be composed of several layers of tightly joined isolation plates, or have a layer of compacted isolating wool attached to a fire resistant ceramic.

Description

In the drawing, the invention is shown schematically in an exemplary embodiment illustrated. It shows F i g. 1 shows a vertical section through the inventive Pour hole in a furnace roof, F i g. 2 in the same way of representation the bulk

hole in a modified embodiment of the invention.

The combustion chamber 2 is located below the furnace roof 1. In the furnace roof 1 is a pouring hole 3 is arranged, which of a pouring stone 4 and a two-part pouring hole pipe 5 is formed, which are made of fireclay.

The pouring hole 3 is covered by a ceiling insulation 6, a pouring hole insulation 7 and a concrete slab 8 surrounded, the latter as a walkable ceiling surface is trained.

The pouring hole 3 becomes a pouring hole insert towards the ceiling surface 1a 9 limited, which consists of metal A pouring hole cover 10 closes the pouring hole insert 9 from.

To the pouring hole 3 in general and the pouring hole cover in particular 10 to protect against the effects of heat from the combustion chamber 2 is in the pouring hole 3 arranged compact insulating insert 11, which - as F i g. 1 shows - by means of a Holding rod 12 passing through the insulating insert 11 with a holding frame 13 in Connection. The holding frame 13 thus carries the Isolation insert 11 and is in the downwardly tapering pouring hole insert 9 is used. Because the pouring hole insert 9 in the direction of the combustion chamber 2 has a narrower opening than above in the area of the ceiling surface 1 a, the holding frame 13 is approximately in the middle of the pouring hole insert 9 held.

The holding frame 13 can be made of flat steel with bent ends or consist of a pot.

F i g. 2 shows another variant of the suspension of the insulating insert 11 by using a retaining screw 14 instead of the retaining rod 12, which is shown in the insulating insert is screwed in.

The insulating insert 11 can consist of individual, stacked Insulating plates or made of a light-weight fire brick 11a with insulating wool arranged above it exist. An insulating insert 11 designed in this way then uses the suspension F i g. 1.

The insulating insert 11 can also become a one-piece insulating plug are pressed together. For this purpose, the in FIG. 2 suspension shown applied by screwing a retaining screw t4 into the insulating plug.

Claims (5)

Claims: 1. pouring hole for the furnace roof of kilns, in particular Kilns for ceramic goods, which are filled with insulating material and with a The pouring hole cover is closed, that is the insulating material to one which can be inserted and removed from the pouring hole (3) compact insulating insert (11) is assembled, which with a holding frame (13) is in connection, of a pouring hole cover (10) carrying the pouring hole insert (9) is held. 2. pouring hole according to claim 1, characterized in that as a connection A holding rod (12) is provided between the insulating insert (11) and the holding frame (13) is. 3. pouring hole according to claim 1, characterized in that as a connection a retaining screw (14) is provided between the insulating insert (11) and the retaining frame (13) is, which can be screwed into the insulating insert (11). 4. pouring hole according to one of claims 1 to 3, characterized in that that the insulating insert (11) consists of individual high-quality Insulation panels consists. 5. pouring hole according to one of claims 1 to 4, characterized in that that the insulating insert (11) made of a lightweight refractory brick (11a) with arranged above it Compressed insulating wool consists. The invention relates to pouring holes in the furnace roof of kilns, in particular ceramic kilns, arranged with insulating material are filled and closed with a pouring hole cover. Such kilns are usually carried out with furnaces from above. To this end, the Cross-section of the furnace ceiling in the various furnace zones at certain distances from one another round or square openings, so-called pouring holes, over which the furnace is heated by means of burners. The pouring holes usually have a smooth, continuous inner surface. If a pouring hole is not filled with a burner, it will be at its upper one End covered with a simple pouring hole cover that is flush with the surface of the Oven ceiling is at the same height. This cover of the pouring holes has, however, thermal engineering Disadvantages result. As a result of the under the pouring hole in the combustion chamber The walls of the pouring hole glow at high temperatures, and an extremely strong one takes place The lid heats up to well over 400 "C. This causes a very strong radiation to the surrounding area, so that a great impairment of the staff and those at the kiln Switching and control devices enters. In addition, as a result of the outward radiation great loss of energy takes place. To avoid these disadvantages, an annular shoulder could be placed in the pouring hole be attached (GB-PS 12 13 758), which has the task of a sealing cap to wear, which allows the pouring hole between the pouring hole cover and cap to be filled in with insulating compound. Although this arrangement only provides an adequate seal the furnace atmosphere is supposed to protect against external influences, it also prevents them another heating of the pouring hole cover. However, this known arrangement has the disadvantage that with pouring holes, which are to be used again, removing the filled insulating material very difficult to do, since the person in charge, the more removed it from the insulating material and approached the sealing cap. one increasing heat load is exposed, so that the risk of burns caused accidents. As for removing the insulating material as well If a certain amount of time has to be available, this is educationally wage-intensive and therefore unprofitable. The well-known arrangement is also only available for furnaces that are to be newly constructed applicable because kilns already in operation do not have pouring holes, which have an annular shoulder for supporting a closure cover. The object of the invention is to heat up the pouring hole cover to be avoided, the insulation to be provided in the pouring hole being designed in this way should that they can be easily and quickly inserted into the pouring hole and removed again and can also be used in older kilns that are in operation is. This object is achieved in that the insulation material to put together a removable compact insulating insert that can be inserted into the pouring hole is, which is in communication with a holding frame, from one of the pouring hole cover load-bearing pouring hole insert is held. A feature of the invention is that as a connection between Insulating insert and holding frame a holding rod is provided. Can also be used as a connection between the insulating insert and the holding frame a retaining screw can be provided which can be screwed into the insulating insert. The insulating insert expediently consists of individual layers stacked on top of one another high-quality insulating panels or from a lightweight fire brick with a compressed insulating wool. Since the insulating insert is only hung in the pouring hole it can be used quickly when closing a pouring hole and can be used when commissioning the same can be removed quickly. All that is required is a movement of the hand. Special precautions to avoid burns to the person performing this operation avoid need not be hit. There is also the possibility of placing the insulating insert in pouring holes to use existing kilns, reducing the temperature of the pouring hole cover can be lowered to only about 60 "C. Since the use of the insulating insert no special training of the pouring hole requires z. B. Attaching a ring shoulder, can also continue the usual pouring hole pipes are used, so that here too no increased production costs attack.