Intrinsically safe electrically magnetically operated hydraulic valve

US6779776B2 · kind B2 · utility

Assignee

• DBT GMBH · DE

Inventors

• Franz-Heinrich Suilmann · Werne, DE
• Michael Dettmers · Kamen, DE
• Jens Titschert · Grafenau, DE
• Hans-Udo Rheiner · Menden, DE

Key dates

• Filing date: Feb 26, 2003
• Grant date: Aug 24, 2004
• Expiry date: Feb 26, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B13/044
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A solenoid operated hydraulic valve for electro-hydraulic controlled underground mining installations such as advancing support frame controllers, with an actuator housing holding coil bodies, an armature, a magnetizable core, and an operating pin of at least two solenoids. The head end for the operating pins of each solenoid has a cut-out for an operating stroke adjuster. A head plate removable from the actuator housing is provided with a manual operating device for each operating pin and is fastened to the head end of the actuator housing with a head seal between them, a removable valve block accepting the hydraulic multi-way valves and an interposed base seal fastened to the actuator housing base. A housing having a socket connects to an intrinsically safe current supply and accepts the operating electronics for the solenoids, and is located on the side of the actuator housing. In each head end cut-out, an electronic protective circuit for the associated coil body is arranged.