Drive Device

Abstract

A driving device for adjusting an activating element of a throttle, of a valve, of a connecting device, of a metering device or the like in particular in the field of oil and gas exploration with at least one rotary gear movably connected to the activating element and a gear arranged between the rotary gear and at least one motor. To improve such a drive device in that the structure is simple and compact and efficiency is increased wherein simultaneously high axial forces are avoided and only a small number of assembly parts are necessary, the gear unit comprises a reduction gear assigned to the rotary gear in particular the so called harmonic drive gear, and a spare gear assigned to the motor which is in particular self locking.

1 . An axial control valve comprising:
 a housing including an inlet and an outlet and a flow channel connecting the inlet and the outlet;   a flow-around body arranged in the flow channel;   a flow restrictor that can vary a flow rate through the valve, comprising a perforated hollow cylinder located in the flow channel;   an actuation mechanism disposed in the flow-around body and coupled to the flow restrictor; and   where the actuation mechanism can actuate axially to adjust the exposure of the holes in the perforated panel to vary the flow rate through the valve.   
     
     
         2 . The valve of  claim 1 , wherein the perforated panel comprises holes of different diameters formed in an axial direction. 
     
     
         3 . The valve of  claim 1 , wherein the perforated panel comprises a hollow sleeve comprising holes arranged in the sleeve. 
     
     
         4 . The valve of  claim 1 , wherein the flow restrictor is mounted downstream relative to the flow-around body. 
     
     
         5 . The valve of  claim 1 , wherein the flow-around body is centrally located in the flow channel. 
     
     
         6 . The valve of  claim 1 , wherein the flow-around body is supported by ribs evenly spaced around the flow-around body. 
     
     
         7 . The valve of  claim 11 , wherein fluid flow through the flow restrictor is evenly distributed. 
     
     
         8 . The valve of  claim 11 , wherein the flowpath of the fluid through the flow channel is annular. 
     
     
         9 . The valve of  claim 11 , wherein the actuation mechanism comprises a sliding rod. 
     
     
         10 . The vale of  claim 11 , wherein the flow restrictor does not rotate relative to the housing. 
     
     
         11 . An axial control valve for controlling fluid flow comprising:
 a housing comprising a flow channel therethrough;   an inner body located in the flow channel;   an cage located in the flow channel such that all fluid flow through the flow channel flows through the cage;   an actuation mechanism located in the inner body and wherein actuation of the actuation mechanism in a linear direction adjusts the amount of flow through the cage; and   wherein the cage is fully surrounded by the flow channel.   
     
     
         12 . The valve of  claim 11  wherein the inner body comprises a circular shaped cross section. 
     
     
         13 . The valve of  claim 11 , the cage comprises an annular sleeve including ports. 
     
     
         14 . The valve of  claim 13 , wherein the ports are circular. 
     
     
         15 . The valve of  claim 11 , wherein the inner body is centrally located in the flow channel. 
     
     
         16 . The valve of  claim 11 , wherein the inner body is supported by ribs evenly spaced around the inner body. 
     
     
         17 . The valve of  claim 11 , wherein fluid flow through the cage is evenly distributed. 
     
     
         18 . The valve of  claim 11 , wherein the flowpath of the fluid through the flow channel is annular. 
     
     
         19 . The valve of  claim 11 , wherein the actuation mechanism comprises a sliding rod. 
     
     
         20 . The vale of  claim 11 , wherein the cage does not rotate relative to the housing.