HU194078B - Method for renewing fireproof plates used at gate valves - Google Patents

Abstract

Ein verschlissene, feuerfeste Platte für Schieberverschlüsse wird dadurch erneuert, daß die Schließfläche mit einer neuen Durchflußöffnung versehen sowie die alte Durchflußöffnung verschlossen und als neue Schließfläche ausgebildetwird, um die Reparaturzu vereinfachen und in der Auswirkung zu verbessern.

Description

FIELD OF THE INVENTION The present invention relates to a method for reconditioning refractory sheets used as slabs or adjustable slides for metallic vessel slides, which have at least one penetration hole damaged by a wear field and a stop valve.

It is known to prematurely reduce the cost of replacing worn blades that have a through opening due to thermal stress cracks, corrosion and erosion effects of the cast jet, and frictional forces between the bottom blade and the blade. they are being refurbished, overhauled or maintained. Instead of new sheets, improved sheets are used, in which the wear area of the through opening is chamfered and replaced with inserts or filler for the meat portion of the sheet lost during straightening. Correspondingly, No. 32,430,305. The German patent patent proposes methods of drilling a worn through hole almost to the periphery of the sheet and filling the drilling site with a refractory molding compound (with the free passage of the permeable cross section). Optionally, a prefabricated ring is placed which defines the through hole at the sliding surface of the sheet. This maintenance is limited to the throughput of the sheet and does not care about the sheet's closing surface.

The object of the present invention is to achieve the goal of making maintenance easier on the closing surface, thereby making the repair of the sheet simpler and more efficient.

According to the present invention, this object is solved by providing a new passage through the sealing surface of the worn sheet, and by closing the worn passage opening and forming a new sealing surface. In this way, the refractory panels of the gate valves are renewed in a balanced way, both at the through openings and at the closing surfaces. The procedure steps are easy to complete. A further advantage is the significantly longer service life of the panels, as the panels provide practically novel through holes and closures.

After cleaning, it is advantageous to seal the worn-through passageways with a prepared stopper, which, at least on the sliding surface of the sheet, is applied using a refractory putty, mortar or similar material, smoothing the wear pad with a trowel. The core of the newly drilled through hole can be used as a stopper in the old through hole.

Alternatively, the worn and cleaned passage, including the wear field, may be filled with a quick drying or curing pourable refractory material and have a smooth and flat surface instead of using a plug. This procedure is particularly simple and easy to perform.

The invention will now be described with reference to two exemplary embodiments thereof, of which:

Figure 1 is a schematic longitudinal sectional view of parts of a refractory wear liner having a worn bottom flap;

Figure 2 is a plan view of the worn sliding blade of Figure 1;

Fig. 3 is a view similar to Fig. 2 of the repaired blade;

Figure 4 is a sectional view of an improved portion of the sheet of Figure 3;

Figure 5 is a worn multi-hole rotor of a rotary lock;

Figure 6, same sheet corrected; Figure 7 is a sectional view of the corrected portion of the sheet.

1 of the worn, refractory part of the lock shown in Fig. 1 is the fixed inlet sleeve and 2 is its through-hole. Below the inlet sleeve 1 there is also a fixed bottom plate 4 with a through opening with a single axis through opening 2. The sliding surface 10 of the sliding plate 5 lies on the sliding surface 9 of the bottom plate. The through opening 6 in the sliding plate 5 is coaxial with the through opening 7 in the outlet sleeve 8. The slider 5 and the sleeve 8 can be moved together to open and close the slider and to damp it. As it is moved, the sliding surfaces 9 and 10 of the bottom plate 4 and the sliding plate 5 are sealed to one another, and the through holes 3 and 6 create, eliminate and modify the casting radius. Thus, after a certain period of operation, wear areas 11 and 12 are formed around the edges of the recesses, which necessitates replacement of the bottom plate 4 and the sliding plate 5.

Replaced old sheets, the closure portion of which is still mostly reliable, are visually inspected and thoroughly cleaned, preferably with a mechanically powered steel blade / burn. For this, as shown in Figures 2-4. For example, a through hole 6a is drilled on the pusher plate on the largely undamaged closure 13. The drill core thus obtained as a plug 14, using a refractory mortar 15 or similar material, closes the old through opening 6. The same material is used to spatulate or smooth the wear area 12 on the sliding surface 10 of the sliding plate 5 to form a new closure portion 13a.

If the interleaves, i.e., the sheets having sliding surfaces on both sides thereof, are to be repaired, the second sliding surface, indicated by reference numeral 16 in FIG. 4, is first worn before the repair described above is carried out. Instead of the drill core, we can insert into the old through hole 6 a prepared, bonded joint plug and then the wear area 12a is leveled with a refractory mortar 15 to the height of the sliding surface 10a. It goes without saying that the same repair operations

5-7. In the embodiment illustrated in Figs. In this case, the rotary blade 20 used in the rotary locks has to be renewed, the alternately used through openings 21 and 22 having wear areas 23 that endanger safety. After visual inspection and cleaning of the wear areas 23, and after drilling new passageways 21a and 22a in the closures 24 and 25, the worn passageways 21 and 22 are filled with refractory material 26 and smoothed on the sliding surface 27 of the rotating blade 20 to They are forming.

In each case, the renewal of the panels according to the invention is sufficient for safe operation. In addition, the planar surface of the sheet, which serves as a sliding surface, can be additionally ground planed.

Claims (6)

1. Procedure for fireproof plates used as slabs or adjustable sliding sheets for metallic vessel slides with at least one penetration opening damaged by a wear field and a closing press. 194.078, characterized in that the worn slider (5 and 20) is provided with a new through opening (6a, 21a, 22a) in the closure (13 and 24, 25) and a worn through opening (6, 21, 22, 22) ) and is formed as a new closure (13a, 24, 25a). A method according to claim 1, characterized in that the worn through opening (6) is cleaned and a prepared stopper (14) is inserted therein. Method according to claim 2, characterized in that the stopper (14) is at least on the sliding surface (10) of the sliding plate (5) using a refractory putty, mortar (15) or similar material, smoothing the wear area (12) with a smoothing plate. insert it. Method according to claim 2, characterized in that the drill core of the newly drilled jet hole (6a) is used as a plug (14). A method according to claim 1, characterized in that the worn and cleaned through opening (21, 22), including the wear field (^ 3), is provided with a fast drying or curing castable refractory material. 10 (24) so that the refractory material extends to the sliding surface (27) and has a smooth and flat surface.