DE2826606B1 - Process for feeding a clamping plate and pre-assembled unit for carrying out the process - Google Patents

Description

35

The invention relates to a method for adjusting a clamping plate for the casting during Casting of steel blocks, whereby individual pipes (channel stones or funnel tubes) outside of the clamping plate to be delivered to a multitude of individual tubes comprehensive unit pre-assembled and then inserted the pre-assembled unit into the clamping plate will. The invention also relates to a unit for carrying out the method.

The introduction of the conventional channel stones into the clamping plate and the funnel pipes on the clamping plate and in the pouring funnel is very ^{5 (} > labor-intensive and time-consuming. In addition, the operating personnel are heavily stressed by the thermal radiation of the clamping plate, since the clamping plate becomes a adopts a higher temperature and due to its high heat capacity and its relatively limited cooling surface cools only slowly after casting the preassembled unit is lowered into the clamping plate by means of the stone-laying device.

Furthermore, the person skilled in the art is familiar with the fact that the dimensions of the channel stones to be used and Funnel tubes are standardized in order to achieve a limitation in the number of stone formats (see "Steel and Iron" - 1978 - pages 32-36). So funnel pipes have a standardized length of 270 and 330 mm and channel stones have a standardized length from 170 to 420 mm. The channel stones usually have square outer dimensions. In order to reduce the cost of the high quality refractory material, im During the 20s the proposal was made (DE-PS 4 36 255 and DE-PS 4 54 536), a canal stone built up from two layers, with only the inner core made of high quality refractory material consists, while the outer coat made of inferior fabric, such. B. clay, can exist. To the additional patent 4,54,536 protrudes the core at one end face against the jacket slightly so that the channel stones arranged one behind the other are pushed into one another via a tongue and groove connection can. The laying of the two-layer sewer stones described above is time-consuming on the warm or hot clamping plate, so that the known annoyance of the operating staff are inevitable.

The present invention is based on the object of a method and a means for carrying it out of the procedure that allow, with a considerable reduction in the nuisance of the Operating personnel to produce a cost-effective and time-saving delivery of the clamping plate.

This object is achieved according to the invention in that thin-walled individual tubes made of high quality, Refractory material in one of the cross-section of the clamping plate or the pouring funnel to be delivered corresponding form of minerals mixed with binders are coated, after which at least partial setting of the binder the shaped multi-layer prefabricated unit inserted in clamping plate will.

The wall thickness of the individual tubes is chosen so that the wear and tear does not exceed that during a casting Wall thickness of the pipe made of high quality refractory material goes beyond. It has been shown that at least 40% by weight, preferably 40 to 60% by weight, of the prefabricated building unit consist of cheap minerals can. In typical embodiments, the wall thickness of the high-quality refractory material is 5 up to 20, in particular 7 to 15 mm. The thin-walled individual tubes preferably have a tongue and groove connection.

The external dimensions of the molded, multi-layer prefabricated unit are in accordance with the selected cross-sections of the clamping plate or the pouring funnel with a small undersize, so that the prefabricated unit can be easily installed. The remaining small undersize can, for. B. to be filled with sand. A prefabricated unit can - depending on the length of the rotor arm of the clamping plate - have a length of more than 2 m, in particular more than 3 m.

As substances for the inexpensive mineral coating sand, ash, slag and / or tuff (porous stone material) are recommended. These minerals water-binding or chemical binders are added, so that sufficient strength of the Coat is guaranteed. It can be advantageous to additionally reinforce, in particular an iron reinforcement to be arranged in order to increase the stability of the large-format prefabricated unit support financially.

ORIGINAL INSPECTED

According to a further preferred embodiment, the substances for the mineral coating heat-insulating material added. So it can be advantageous if the mineral coat is from 10 to Contains 40% by weight of heat-insulating material (e.g. porous clay) The heat-insulating material is preserved the steel running in the funnel channel system from excessive cooling.

When producing the finished parts, it is easy to move from the pouring funnel in the direction of flow of the steel Provide different inner cross-sections for each rotor arm. It is also advantageous to use the finished part specifically designed for a mold type and thus always the central position of the riser hole or the Ensure riser holes. is

According to a further, preferred embodiment, the prefabricated unit for the individual Steel blocks of different diameters.

The particular advantages of the subject matter of the invention are to be seen in the fact that it is not structurally complex Stone laying device a pre-assembly of an inexpensive prefabricated unit is possible. This prefabricated unit can be accessed by the operating team in a short time with significantly lower heat exposure Clamping plate are used. The continuously formed outer jacket in the subject matter of the invention has the advantage that a risk of breakthrough z. B. with a conventional tongue and groove connection is given, is excluded. The costs for the production of a delivery are significantly reduced, because the consumption of expensive, high-quality refractory material can be reduced by 40 to 60%.

The subject matter of the invention is described below on the basis of the exemplary embodiments shown in the figures explained. It shows F i g. 1 is a plan view of a clamping plate;

F i g. 2 shows a section according to H-II of FIG. 1;

F i g. 3 shows a section according to III-III of FIG. 1;

F i g. 4 shows, in an enlarged illustration, a cross section through a prefabricated structural unit.

The F i g. 1 shows part of the clamping plate 1 with one of four rotor arms and the one in FIG Sprue 3 seated in the center of the sprue. The rotor arm 2 is delivered with a prefabricated unit 4 The pouring funnel 3 is delivered with the prefabricated unit 5 (Fig. 3).

The in Fig. 1 shown prefabricated part 4 of the rotor arm 2 has a length of about 3.60 m, so that after State of the art to use about 12 channel stones in the runner arm 2 for the delivery of the runner arm 2 would be. According to the invention, however, only one prefabricated component 4 is to be used. Comparable numerical proportions apply to the delivery of the pouring funnel 3.

The F i g. 2 and 4 illustrate the multi-layer structure based on the prefabricated component 4 for the rotor arm 2. The high-quality refractory material is only provided for the inner tube 6, which in detail The pipe 6 is composed of thin-walled individual pipes connected by tongue and groove surrounding outer jacket 7 consists essentially of inexpensive minerals such. B. Sand and slag. These minerals can be used as a heat insulating material z. B. porous clay may be added. These substances are mixed with a binder and shaped into a finished part 4 in a mold. The mold is formed in such a way that taking into account a slight undersize of the square cross-section of the rotor arm to be delivered 2 corresponds to reinforcement in the corners of the square cross-section filled with minerals 8 arranged to promote stability in the large-volume prefabricated unit 4 shown and a to allow safe handling from the mold to the clamping plate. Those to be provided in the runner arm 2 Riser holes have the reference numbers 9.

The refractory lining of the pouring funnel 3 is also through a prefabricated unit 5 with a multi-layer structure given. Inside are the high-quality tubes 6, surrounded by the inexpensive one Mineral jacket 7. The mineral jacket 7 is continuous so that the butt joints (not shown) the thin-walled individual tubes of the tube 6 are covered. A breakthrough of the liquid Steel is therefore not to be feared.

For this purpose 2 sheets of drawings

Claims (5)

Patent claims: 1. Procedure for infeeding a clamping plate for sub-casting when casting steel blocks, whereby individual pipes (sewer stones or funnel pipes) made of high-quality refractory material outside of the clamping plate to be delivered to form a multitude of individual tubes Unit is pre-assembled and then the pre-assembled unit is inserted into the clamping plate, characterized in that thin-walled individual tubes from the high-quality, refractory Material in a corresponding to the cross-section of the clamping plate or the pouring funnel to be delivered Form of minerals mixed with binders are coated, after which at least partial setting of the binder, the shaped, multi-layer prefabricated unit is inserted into the tensioning plate. 2. Prefabricated unit for performing the method according to claim 1, characterized in that the mineral coating (7) is at least 40% by weight of the weight of the prefabricated unit (4,5). 3. Prefabricated unit according to claim 2, characterized in that the mineral material jacket (7) Contains substances such as sand, ash, slag and / or tuff. 4. Prefabricated unit according to claim 2 or 3, characterized in that the mineral material jacket Contains heat insulating material. 5. Prefabricated unit according to one of claims 2-4, characterized in that in the mineral material jacket (7) a reinforcement (8) is arranged.