Pressure closed-loop control digital integrated direct-acting proportional relief valve

Abstract

The invention discloses a pressure closed loop control digital integrated direct acting type proportional overflow valve, which comprises a valve body, a proportional electromagnet, a pressure sensor and a pressure closed loop control digital integrated amplifier, wherein the proportional electromagnet and the pressure sensor are respectively arranged at the left side and the right side of the valve body, the pressure closed loop control digital integrated amplifier is connected with the pressure sensor through a signal conducting wire, the front end of the proportional electromagnet is provided with a push rod, the push rod acts on a valve core, a reset spring is arranged between the valve core and a valve seat, the valve core and the reset spring are respectively arranged in a guide sleeve, the guide sleeve is arranged on the valve seat and is matched with the valve core, a front end hole of the valve seat is communicated with the pressure sensor, the bottom of the valve body is provided with a pressure oil opening and an oil return opening, the pressure oil opening is communicated with the front end hole of the valve seat, and the oil return opening is respectively communicated with the rest spring and an oil passage arranged in the proportional electromagnet. Therefore the work of the pressure closed loop control digital integrated direct acting type proportional overflow valve is stable, the sensitivity is high, the hysteresis is little, the dynamic quality is high, the reliability is high, the reset spring achieves the protection effect, and the valve unloading pressure at the zero signal current can be reduced.

Description

technical field [0001] The invention relates to an overflow valve, in particular to a pressure closed-loop control digital integrated direct-acting proportional overflow valve. Background technique [0002] Ordinary direct-acting proportional relief valves are driven by proportional electromagnets. The regulating pressure of the valve is greatly affected by the overflow variation and temperature. Large hysteresis and poor stability. This makes the performance and reliability of proportional relief valves not up to the requirements of high pressure and high precision applications. [0003] Therefore, in order to solve the above problems, a new technical solution is provided. Contents of the invention [0004] The invention provides a pressure closed-loop control digital integrated direct-acting proportional overflow valve with small pressure regulation deviation, small hysteresis, high stability and good dynamic quality. [0005] The technical scheme adopted in the prese...

AI Technical Summary

Problems solved by technology

[0002] Ordinary direct-acting proportional relief valves are driven by proportional electromagnets. The regulating pressure of the valve is greatly affected by the overflow variation and temperature. Large hysteresis and poor stability

This makes the performance and reliability of the proportional relief valve not up to the requirements of high pressure and high precision applications

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