초록 ▼

A sealed control valve assembly is provided for use in connection with a fluid valve having an inlet, an outlet and a flow control orifice hydraulically interposed therebetween for controlling the flow through the fluid valve. The valve assembly includes a sealed cylindrical isolator cap sealingly m

A sealed control valve assembly is provided for use in connection with a fluid valve having an inlet, an outlet and a flow control orifice hydraulically interposed therebetween for controlling the flow through the fluid valve. The valve assembly includes a sealed cylindrical isolator cap sealingly mounted to the fluid valve so that the chamber defined by the isolator cap is in hydraulic communication with the fluid valve. In one embodiment, an armature composed of a magnetic material is reciprocatably disposed within the isolator cap. A modulating plug is connected to a lower end of the armature to extend outside the isolator cap into the fluid valve adjacent the flow control orifice. A magnetic pole piece assembly, including a magnetic sandwiched between a pair of pole pieces, is reciprocatably disposed outside and adjacent to the isolator cap. A diaphragm assembly is provided to move the pole piece assembly down in response to fluid pressure exerted against the diaphragm. The pressure against the diaphragm can be varied in relation to a condition of the fluid flowing through the fluid valve. The pole piece assembly and the armature form a magnetic circuit so that the armature follows the movement of the pole piece assembly in order to maintain the continuity of the magnetic circuit. The modulating plug moves with the armature to modulate the fluid flowing through the flow control orifice in the fluid valve. A biasing spring may be provided to react against the downward action of the diaphragm and provide a return stroke for the pole piece assembly and armature. Rotary actuated and rotary-linear actuated sealed valve assemblies are also disclosed.

대표청구항 ▼

A sealed magnetic control valve assembly for use in connection with a fluid valve controlling flow through a conduit, the fluid valve having an inlet, an outlet and a flow control orifice hydraulically disposed therebetween, the valve assembly comprising: a sealed cylindrical isolator cap having a l

A sealed magnetic control valve assembly for use in connection with a fluid valve controlling flow through a conduit, the fluid valve having an inlet, an outlet and a flow control orifice hydraulically disposed therebetween, the valve assembly comprising: a sealed cylindrical isolator cap having a longitudinal length and defining a chamber open at one end; means for sealingly mounting said isolator cap at said one end to the fluid valve such that said chamber is in fluid communication with the fluid valve; an armature composed of a magnetic material and reciprocatably disposed within said chamber of said isolator cap; and a modulating plug connected to said armature to extend outside said chamber through said one end and into the fluid valve adjacent the flow control orifice when said isolator cap is mounted to the fluid valve, whereby modulation of said modulating plug within the flow control orifice controls the flow of fluid through the outlet of the fluid valve; a pole piece assembly reciprocatably disposed outside and adjacent to said isolator cap and including; a plurality of pole pieces composed of a magnetic material and positioned in series to define a first length; and a magnet disposed between and separating each of said plurality of pole pieces; means for moving said pole piece assembly along the longitudinal length of said isolator cap, wherein said armature includes a plurality of projections defining a length substantially equal to said first length defined by said plurality of pole pieces; whereby said armature and said pole piece assembly define a magnetic circuit so that when said pole piece assembly is moved along the longitudinal length of said isolator cap, by said means for moving, said armature moves within said isolator cap in direct relation thereto to maintain the magnetic circuit, such that said plurality of projections and said plurality of pole pieces are in direct alignment with each other in all positions of said modulating plug; and further whereby said modulating plug moves with said armature to vary fluid flow through the flow control orifice and the outlet of the fluid valve in relation to the movement of said modulating plug relative to the flow control orifice.