A self-priming nozzle

Abstract

The invention provides a self-suction sprayer which is applicable to a metal sheet quenching machine. The self-suction sprayer is an upper sprayer when being installed between the upper pressure rollers of the quenching machine, and is a lower sprayer when being installed between the lower delivery rollers of the quenching machine. The upper sprayer or lower sprayer is respectively provided with a spray orifice and water retaining rollers, wherein the spray orifice and the operation direction of the metal sheet form a certain included angle; the water retaining rollers are pressed on the upper and lower surfaces of a workpiece to be quenched by an actuating mechanism; the upper sprayer or lower sprayer is provided with a collection water tank between the spray orifice and the water retaining roller; and excess cooling water rushes to the collection water tank and is discharged through both sides of the collection water tank. The self-suction sprayer can effectively reduce the cooling remaining water on the steel sheet surface, so that the upper and lower surfaces of the quenched metal sheet and the corresponding contact regions of the upper and lower sprayers are uniformly cooled, thereby enhancing the cooling uniformity of the quenched metal sheet.

Description

technical field [0001] The invention belongs to the technical field of metal plate quenching, in particular to a self-priming nozzle for plate quenching. Background technique [0002] Quenching is an important heat treatment method to improve the strength of metal materials. For sheet metal, a roller quenching machine is generally used for continuous quenching. The roller quenching machine is composed of upper pressing roller, plate conveying roller table and water spray cooling system. The cooling water of the water spray cooling system acts on the surface of the plate through many nozzles, and the temperature of the metal plate is controlled by controlling the flow of the nozzles, so as to obtain the quenched plate with the required structure. [0003] In order to obtain a better quenched plate shape, the commonly used nozzle arrangement is as follows figure 1 As shown, A is the running direction of the plate, and the plate 4 passes through the upper pressing roller 1a,...

AI Technical Summary

Problems solved by technology

[0005] 1) The quenching machine is generally composed of multiple sets of nozzles, so multiple sets of suction devices are required, and the suction devices are expensive, which increases the investment cost;

[0006] 2) The helical roller can drain the accumulated water to the downstream of the helical roller, but because the water storage capacity of the helical tank is too large locally, the metal plate surface is periodically overcooled locally, forming black marks

[0007] 3) The lower cooling water falls after being sprayed, and the water utilization rate is low

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