Abstract A fluid-actuated throttling valve and system for controlling fluid flow through a conduit by operation of the valve. The valve is characterized by having a housing with an inlet and outlet arranged for fluid to flow therethrough and having a valve seat therein for controlling fluid flow therethrough. A mandrel is mounted in the housing and a valve closure assembly is mounted on the mandrel for axial movement thereon, with the mandrel extending through both ends of the valve closure assembly. The mandrel has an enlarged annular portion forming a fixed piston whereby an upstream and a downstream chamber is formed between the closure assembly and the mandrel. The valve closure assembly also supports a ram portion arranged for seating with the valve seat and means are also provided for flowing another fluid to and from the aforesaid chambers to axially move the valve closure means relative to the valve seat for controlling fluid passage through the housing. The system of this invention includes a pair of rotary housings, each of which has an inlet and outlet arranged for flowing fluid therethrough. A rotary impeller wheel is mounted for rotation in each of the housings, with the rate of rotation being related to the flow of fluid through the housings. Coupling means are provided between the rotors for transmitting rotational forces therebetween. Means are included for connecting the inlet and outlet of one of the rotor housings in a first conduit, and a closed loop conduit is connected with the inlet and outlet of the other of said rotor housings. A valve such as that described above is interposed in the closed loop conduit for controlling the flow of the controlled fluid therethrough, thereby controlling the rate of speed of rotation of the impeller wheels and the flow of fluid through the first conduit.
In a system for controlling fluid flow through a first conduit, the combination comprising: a pair of rotor housings, with each of said housings having an inlet and outlet arranged for flowing fluid therethrough; a rotary impeller wheel mounted for rotation in each of said housings with said rotation being related to the flow of fluid through said housings; coupling means between said rotors for transmitting rotational forces therebetween, whereby each of said rotors rotates at a rate of speed proportional to the rate of speed of rotation of the other rotor; one of said rotor housings being connected in said first conduit to allow fluid in said conduit to flow therethrough; a closed loop conduit connected with the inlet and outlet of the other of said rotor housings and arranged for circular flow of a control fluid therethrough at predetermined times; a valve interposed in said closed loop conduit for controlling the flow of said control fluid therethrough, and thereby controlling the rate of speed of rotation of said impeller wheels and the flow of fluid through said first conduit; said valve including: a valve housing having an inlet and an outlet arranged for flow of said control fluid therethrough, and a valve seat arranged in fluid flow controlling relationship therein; a mandrel mounted in said housing; a valve closure assembly having an axial bore therethrough and arranged to receive said mandrel therein in axial sliding relationship therewith, with said axial bore having an enlarged diameter portion intermediate the ends thereof forming an annular cavity between said closure assembly and said mandrel; means associated with said valve closure assembly and said mandrel for separating said annular cavity into an upstream chamber and a downstream chamber whereby fluid pressure applied to one of said chambers moves said assembly in one direction relative to said mandrel, and fluid pressure applied to the other of said chambers moves said assembly in the opposite direction relative to said mandrel; a valve closure means connected with said assembly and supported adjacent said valve seat for seating in fluid flow controlling relationship therewith; and, means for flowing another fluid to and from said chambers to axially move said assembly and said valve closure means relative to said mandrel and said valve seat for controlling fluid passage through said valve housing.
Claim 2
Dependent Claim
385 words
In a system for controlling fluid flow through a first conduit, the combination comprising: a pair of rotor housings, with each of said housings having an inlet and outlet arranged for flowing fluid therethrough; a rotary impeller wheel mounted for rotation in each of said housings with said rotation being related to the flow of fluid through said housings; coupling means between said rotors for transmitting rotational forces therebetween, whereby each of said rotors rotates at a rate of speed proportional to the rate of speed of rotation of the other rotor; one of said rotor housings being connected in said first conduit to allow fluid in said conduit to flow therethrough; a closed loop conduit connected with the inlet and outlet of the other of said rotor housings and arranged for circular flow of a control fluid therethrough at predetermined times; a valve interposed in said closed loop conduit for controlling the flow of said control fluid therethrough, and thereby controlling the rate of speed of rotation of said impeller wheels and the flow of fluid through said first conduit; said valve including: a valve housing having an inlet and an outlet arranged for flow of said control fluid therethrough, and a valve seat arranged in fluid flow controlling relationship therein; a mandrel mounted in said housing; a valve closure assembly having an axial bore therethrough and arranged to receive said mandrel therein in axial sliding relationship therewith, with said axial bore having an enlarged diameter portion intermediate the ends thereof forming an annular cavity between said closure assembly and said mandrel; means associated with said valve closure assembly and said mandrel for separating said annular cavity into an upstream chamber and a downstream chamber whereby fluid pressure applied to one of said chambers moves said assembly in one direction relative to said mandrel, and fluid pressure applied to the other of said chambers moves said assembly in the opposite direction relative to said mandrel; a valve closure means connected with said assembly and supported adjacent said valve seat for seating in fluid flow controlling relationship therewith; and, means for flowing another fluid to and from said chambers to axially move said assembly and said valve closure means relative to said mandrel and said valve seat for controlling fluid passage through said valve housing.
Claim 3
Dependent Claim
38 words
The invention as claimed in claim 1 including: means for sensing the pressure of fluid in said first conduit and in said loop conduit; and, controller means responsive to said sensing means for controlling operation of said valve.
Claim 4
Dependent Claim
38 words
The invention as claimed in claim 1 including: means connected with said coupling means for sensing the rate of rotation of said rotor wheels; and, controller means responsive to said sensing means for controlling operation of said valve.