Speed regulation valve

Abstract

The invention discloses a speed regulation valve. The speed regulation valve comprises a valve core and a regulation shaft, wherein a hole is formed in the valve core; a throttling regulation rod is arranged in the hole; the regulation shaft is arranged between the throttling regulation rod and the valve core and is arranged in the hole, one end of the regulation shaft props against the throttling regulation rod, and the other end of the regulation shaft props against the bottom surface of the hole. According to the technical scheme, a spring arranged between the throttling regulation rod and the valve core in the prior art is replaced by the regulation shaft arranged between the regulation rod and the valve core, the regulation shaft is a solid shaft and props against the throttling regulation rod, when a pressure surge occurs in a hydraulic system, the regulation shaft cannot deform, the aperture of a throttling hole controlled by the throttling regulation rod cannot be changed, so that the influence to the throttling hole by the pressure surge of the hydraulic system is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgical process hydraulic equipment, in particular to a speed regulating valve. Background technique [0002] The speed regulating valve is a combined valve composed of a differential pressure reducing valve and a throttle valve connected in series. The throttle valve is used to adjust the passing flow, and the differential pressure reducing valve automatically compensates for load changes, so that the pressure difference before and after the throttle valve is Fixed value to eliminate the impact of load changes on flow. [0003] In recent years, the aluminum alloy melting and casting tilting furnace has adopted a hydraulic transmission system to precisely control the speed of the hydraulic cylinder. [0004] In the hydraulic system, when the cylinder piston is automatically and rapidly descending, the descending speed of the piston is often slower than the preset speed. If the opening of the thrott...

AI Technical Summary

Problems solved by technology

A hole is provided at the top of the spool 01 of the throttle regulating valve, and a throttle regulating rod 02 and a spring 03 with one end against the throttle regulating rod and the other end against the spool are arranged in the hole, so that the throttle regulating rod 02 has a certain The activity margin, during the descending process of the piston, there will be pressure fluctuations in the hydraulic system, which will have a certain impact on the opening of the orifice. When the pressure of the hydraulic system is too large, the spring 03 will stretch, and the orifice will become smaller. The descending speed of the piston becomes slower. When the pressure of the hydraulic system is too low, the spring 03 is compressed, the orifice becomes larger, the descending speed of the piston becomes faster, the spool 01 moves, the hydraulic system vibrates, and the oil return sound of the pipeline is loud

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