Valve, use of such valve, separator comprising such valve and method of operating a separator
AssigneeHusqvarna AB
InventorAndreas Fogelberg
Life of this patent
Estimating the term…
Abstract
This document discloses a valve comprising a main valve closure body, arranged on a low pressure side of the valve and moveable to open towards the low pressure side, a control body, fixedly connected to the main valve closure body, such that a position of the main valve closure body is fixed relative to a position of the control body, a control chamber, partially defined by the control body, whereby a volume of the control chamber is variable in relation to the position of the control body, and a control fluid connector for controlling a pressure in the control chamber. The document also discloses use of the valve in a separator for separating dust and debris from an airflow, a separator comprising such a valve and a method of operating a separator.
Claims17
A valve having a predetermined low pressure side, comprising:
- a main valve closure body arranged on the low pressure side of the valve, the main valve closure body being moveable towards the low pressure side into an open position and away from the low pressure side into a closed position,
- a control body, fixedly connected to the main valve closure body, such that a position of the main valve closure body is fixed relative to a position of the control body,
- a control chamber, partially defined by the control body, whereby a volume of the control chamber is variable in relation to the position of the control body,
- a control fluid connector coupled to the control chamber, and
- a trigger valve movable between an open state and a closed state to control operation of the control chamber and move the main valve closure body, the trigger valve being a pressure balanced valve;
- wherein the trigger valve comprises:
- a trigger space coupled to the control fluid connector,
- a first trigger closure body operable on a first trigger seat facing outwardly of the trigger space, and
- a second trigger closure body, rigidly connected to the first trigger closure body and operable on a second trigger seat facing inwardly of the trigger space;
- wherein, in the open state, the first trigger closure body is positioned away from the first trigger seat and the second trigger closure is positioned away from the second trigger seat to connects the trigger space and the control chamber to first pressure which is sufficiently high to expand the volume of the control chamber and cause the main valve closure body to move into the open position;
- wherein, in a closed state, the first trigger closure body is positioned in engagement with the first trigger seat and the second trigger closure is positioned in engagement with the second trigger seat to seal the trigger space from the first pressure and connect the trigger space and the control chamber to a suction source that contracts the volume of the control chamber and causes the main valve closure body to move into the closed position.
Dependencies are inferred from the claim text.