ONE BODY TYPE ELECTRONIC PROPORTIONAL PRESSURE REDUCING VALVE

• Main Authors: KIM, DANG JU, SON, HO YEON
• Format: Patent
• Language: English; Korean
• Published: 07.03.2014
• Subjects: ACTUATING-FLOATS; BASIC ELECTRIC ELEMENTS; BLASTING; COCKS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DEVICES FOR VENTING OR AERATING; ELECTRICITY; ENGINEERING ELEMENTS AND UNITS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; INDUCTANCES; LIGHTING; MAGNETS; MECHANICAL ENGINEERING; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TAPS; THERMAL INSULATION IN GENERAL; TRANSFORMERS; VALVES; WEAPONS

The present invention relates to an integrated electro-proportional pressure reducing valve which comprises: a casing including a first flow path connected to a hydraulic source, a second flow path connected to a cylinder, a third flow path connected to a tank, and a mounting hole communicating with the first, the second, and the third flow path; a solenoid valve assembly having a tube assembled in the center of the body thereof, wherein a plunger with a pressure pin is installed inside the tube, is elastically supported to the casing by the first spring touching the other end of the plunger, and is reciprocated inside the tube by an electromagnetic force generated when power is applied; the plunger assembled to be able to reciprocate inside the tube, having the pressure pin at one end thereof, having the first spring touching the other end thereof, and elastically supported to the casing by the first spring; a flange assembled to one end of the central hole of the solenoid assembly and having a pin guide hole which is formed to pass therethrough and through which the pressure pin passes and is guided; a sleeve assembled to the flange and having a body of which the outer surfaces corresponding to the first flow path to the third flow path have a first, a second, and a third communication hole formed to pass through the outer surfaces; and a spool having outer surfaces which are adjacent to the first, the second, and the third communication hole and have a first spool land, a second spool land, and a third spool land formed to protrude from the outer surfaces respectively, touching the pressure pin, assembled to the sleeve, able to slide, and elastically supported toward the flange by a second spring touching the sealed end of the mounting hole, wherein the mounting hole of the casing has a valve body assembled thereto and formed by arranging the spool, which touches the pressure pin, inside the sleeve after coupling the sleeve with the flange assembled to the solenoid valve assembly.