Novel electric control valve structure

Abstract

The invention discloses a novel electric control valve structure which comprises a shell, an adjusting shaft, a rotary driving assembly, a base, a cartridge valve and a limiting ejector rod. A first cavity is formed between the adjusting shaft and the shell, a second cavity is formed in the base, a first oil inlet hole is formed in the side wall of the second cavity, and a series connection oil way is formed in the shell and communicates with the first cavity and the second cavity; a third cavity is formed between the limiting ejector rod and the adjusting shaft, a second oil inlet hole is formed in the side wall of the third cavity, the second oil inlet hole communicates with the first cavity and the third cavity, the lower end of the limiting ejector rod penetrates through the second cavity and is inserted into the cartridge valve, and the limiting ejector rod controls the maximum opening degree of a valve body of the cartridge valve; and a first shape and a second shape are matchedto limit the limiting ejector rod to only move linearly but not rotate. Upper and lower structure hydraulic balance of a cartridge valve control cavity is achieved by the external circulation of the series connection oil way, and dry grinding damage of part of components is prevented, so that the purpose of reducing the adjusting resistance is achieved.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a novel electric regulating valve structure. Background technique [0002] At present, in the die-casting machine and injection molding machine industry, the opening limit adjustment structure of the cartridge valve includes manual adjustment and electric adjustment. Threaded connection, one end of the adjusting ejector rod is inserted into the control chamber of the valve core, and the opening of the valve core is limited by manually turning the handwheel to drive the adjusting ejector rod forward or backward. The manual adjustment structure is simple, and only a part of the limit ejector rod is submerged in the hydraulic chamber connected to the control chamber of the cartridge valve core, and the hydraulic pressure received is not completely balanced. Therefore, when the oil pressure in the control chamber of the cartridge valve is high , the ejector rod bears a larg...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a new type of electric regulating valve structure to solve the problem that the hydraulic oil cannot pass through the limit ejector rod when the limit ejector rod rotates to the top in the prior art. The technical problem of hydraulic balance realized by colluding oil circuit on

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