DRIVE FOR PIPELINE VALVES AND ACCESSORIES Russian patent published in 2015 - IPC F16K31/12 F16K31/70 

FIELD: machine building.

SUBSTANCE: invention relates to pipeline valve building. The drive for pipeline valves and accessories contains parallel plates connected by tie rods with Bellevible spring assemblies on them supported by a plate, mobile with reference to tie rods, with the gate stem of pipeline valves fixed on it, and the cylindrical pneumatic actuator controlled through the pneumatic distributor and connected with the mobile plate. The lower plate is connected with the cover of pipeline valve. The single action pneumatic actuator stem fixed on the lower plate interacts with the radial gap of the spreader, connected with the mobile plate, for example, tie rods. The top plate is supported by barrels enclosing Bellevible spring assemblies movable during the drive operation along the pipe limiting level of compression of Bellevible spring assembly coaxially installed on the tie rods. The traverse is implemented as either round, or many-sided and it is fitted with profile chamfers the number of which is equal to the number of Bellevible spring assemblies.

EFFECT: invention is aimed at improvement of reliability and maintainability of the drive for pipeline valves.

2 cl, 5 dwg