Apparatus for checking the operation of a plurality of liquid sprays in a continuous casting apparatus
AssigneeHoogovens Ijmuiden, B.V.
InventorsGerardus A. van der Linden, Mas van Slooten
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Abstract
Apparatus for continuous casting has pairs of rolls defining a path for the solidifying slab of steel. Between the rolls on each side are rows of spray nozzles. To check the operation of the sprays and thus achieve uniform cooling, checking apparatus carrying detectors for the sprayed water is passed through the path. To achieve a useful measure of the spraying efficiency the detectors must be highly sensitive and robust. Each detector has a metal diaphragm which is set in vibration by the sprayed water and a piezo-electric element fixed to the diaphragm so as to emit a signal whose amplitude is dependent on the amplitude of the vibration of the diaphragm.
Claims10
In apparatus for checking the operation of a plurality of liquid sprays which are arranged along a path to spray liquid onto an object moving along said path, the apparatus comprising a carriage adapted to be moved along said path and a plurality of detectors for the sprayed liquid arranged across the carriage so as together to detect the sprayed liquid across the width of the path, the improvement that each of said detectors comprises an element capable of vibration which in use is exposed to the sprayed liquid so as to be set in vibration thereby and sensing means adapted to sense the vibration of said element and to provide an output in dependence on the amplitude of the vibration.
In combination, apparatus for spraying liquid onto an object movable along a path having a plurality of rows of spraying nozzles extending transversely with respect to the direction of movement of the object along the path, apparatus for checking the operation of the sprays comprising a carriage adapted to be moved along said path and a plurality of detectors for the sprayed liquid arranged across the carriage so as together to detect the sprayed liquid across the width of the path, each of said detectors comprises an element capable of vibration which in use is exposed to the sprayed liquid so as to be set in vibration thereby and sensing means adapted to sense the vibration of said element and to provide an output in dependence on the amplitude of the vibration wherein the detectors are arranged in at least one row across the said carriage and the number of detectors in the row across the carriage is at least twice the number of spraying nozzles in a row.
Apparatus for continuous casting of steel, comprising
- (a) a mould adapted for continuous casting;
- (b) a plurality of opposed pairs of rolls spaced apart so as to define a path extending between the two rolls of each pair for passage of a continuously cast solidifying steel slab from the mould;
- (c) a plurality of spraying nozzles arranged in a plurality of rows between adjacent said rolls on each side of the said path and adapted to spray water onto the solidifying steel slab;
- (d) a dummy bar adapted to be passed along said path at the head of the continuously cast slab;
- (e) means for checking the operation of the said spraying nozzles comprising
- (i) a carriage adapted to be connected to the dummy bar so as to follow the dummy bar along said path,
- (ii) a plurality of detectors mounted on the carriage and arranged in two rows extending transversely of said carriage respectively on opposite sides of the carriage, each said detector, comprising a metal diaphragm which is exposed to the sprayed water from the nozzles and is adapted to be vibrated by the sprayed water and piezo-electric sensing means connected to said diaphragm and adapted to emit a signal dependent upon the amplitude of the vibration of the diaphragm, the number of detectors in each said row thereof being at least twice the number of said spraying nozzles in any row thereof on the respective side of the said path,
- (iii) means for receiving and analysing the outputs of the piezo-electric elements of the detectors.
Dependencies are inferred from the claim text.