Bar screen system with emergency discharge doors
AssigneeHeadworks, Inc.
InventorGerald Seidl
Life of this patent
Estimating the term…
Abstract
A screen system used in fluid channels has emergency discharge doors. The emergency discharge doors are located within the debris plate of the bar screen system and can be opened, as needed, to prevent fluid from overflowing should the grid screen become obstructed. The emergency discharge doors are located within rectangular openings in the debris plate in which the doors sit flush with the debris plate when closed. The emergency discharge doors can be opened manually, when needed, with handles that are preferably located at the top of the screen system. Lifting the handles releases the locking pins that keep the doors in place, allowing the doors to open freely in response to the fluid pressure on the upstream side of the screen system.
Claims13
A screen system for removing debris from a flow channel, comprising:
- (a) a screen frame having a porous bar grid that is located below an impermeable debris plate;
- (b) a rake having a plurality of fingers that fit between bars of the bar grid, the rakes being movable along the bar grid to clear the bar grid of debris;
- and
- (c) an emergency discharge door located in the debris plate above the bar grid and above the normal water level in the channel, the emergency discharge door being movable from a normally closed position to an open position in the event water in the flow channel rises above the screen grid.
A screen system for removing debris from a flow channel, the screen system comprising:
- (a) a screen frame having a porous bar grid that is located below an impermeable debris plate;
- (b) a rake having a plurality of fingers that fit between bars of the bar grid, the rakes being movable along the bar grid to clear the bar grid of debris;
- (c) an emergency discharge door located in the debris plate above the bar grid, the emergency discharge door being movable from a normally closed position to an open position in the event water in the flow channel rises above the screen grid;
- (d) a hinge along an upper edge of the emergency discharge door, connecting the emergency discharge door to a downstream side of the debris plate;
- (e) lock brace mounted to the emergency discharge door for movement therewith;
- (f) lock bracket mounted to the downstream side of the debris plate for engagement with the lock brace when the emergency discharge door is in the closed position;
- and
- (g) a vertically oriented actuator member having a lower end that engages the lock brace and the lock bracket to secure them together, the actuator member being movable to release the lock brace and the lock bracket from each other.
A screen system for removing debris from a flow channel, comprising;
- (a) a screen frame having a porous bar grid that is located below a debris plate;
- a rake having a plurality of fingers that fit between bars of the bar grid, the rakes being movable along the bar grid to clear the bar grid of debris;
- (b) an emergency discharge door mounted on a downstream side of the debris plate above the bar grid, the emergency discharge door being movable from a normally closed position to an open position in the event water in the flow channel rises above the screen grid,
- (c) a hinge along an upper edge of the emergency discharge door, connecting the emergency discharge door to a downstream side of the debris plate;
- (d) a lock brace mounted to the emergency discharge door for movement therewith;
- (e) a lock bracket mounted to the downstream side of the debris plate for engagement with the lock brave when the emergency discharge door is in the closed position;
- (f) a vertically oriented actuator member having a lower end that engages the lock brace and the lock bracket to secure them together, the actuator member being movable to release the lock brace and the lock bracket from each other;
- (g) the lock brace and the lock bracket have mating holes and the actuator member has a pin that releasably inserts into the mating holes;
- and
- (h) the actuator member moves vertically to remove the pin from the mating holes.
A method of filtering a fluid channel comprising the steps of installing in the fluid channel a screen system having an impermeable debris plate, a bar grid that is located below the debris plate, and a plurality of rakes having fingers that fit between bars of the bar grid, the method further comprising:
- (a) providing an emergency discharge door in the debris plate above the normal water level in the channel;
- (b) flowing a fluid through the screen system while the emergency discharge door is closed, whereby the bar grid filters debris from the fluid;
- and
- (c) opening the emergency discharge doors, if a level of fluid rises and flows over the debris plate due to blockage of the bar grid.
Dependencies are inferred from the claim text.