Abstract:
There is provided a locking device (32), for use in a fluid conduit, comprising: a plunger (36) for engaging a valve in the fluid conduit, the plunger (36) arranged to be moveable in a first axial direction (50) from an undeployed position to a deployed position, the plunger (36) when in its deployed position configured for holding the valve in a valve closed position; and a locking element (56) arranged to engage the plunger (36) in its deployed position so as to prevent movement of the plunger (36) in a second axial direction (52), the second axial direction (52) being opposite to the first axial direction (50).
Abstract:
A double valve device for the prevention of backflow and method of its use Abstract A double device (1) and method serves for mounting in a flow channel of a sewer (47) for the prevention of backflow, which sewer (47) has an intake pipe (50) and an outfall pipe (51) for sewage and/or water. The double valve device (1) comprises an elongated hollow valve body (2, 3) that includes a first elongate hollow member (2) defining a first channel (2a) and a second elongate hollow member (3) defining a second channel (3a) opposite the first channel (2a), an actuator (28) operatively connected to the elongate hollow valve body (2, 3) to allow adjusting the distance between the first elongated hollow member (2) and the second elongate hollow member (3) upon actuation, wherein the first elongate hollow member (2) has a first flap valve (20) pivotally between a closed state and an open state of a first valve opening (55) of the first elongate hollow member (2). The second elongate hollow member (3) has a second flap valve (27) pivotally between a closed state and an open state of a second valve opening (57) of the second elongate hollow member (3), which second valve opening (57) faces the first valve opening (55). The valve device is a backflow blocker, which, during daily operation, allows wastewater to pass by, but in damming and flooding situations automatically closes the flap valves in the drainage line so that water cannot flow into the drain upstream the valve device.
Abstract:
A one-way fluid valve generally referred to as a "reed" type valve includes a valve module which may be deployed as part of a valve assembly. The valve module includes a body with at least one fluid channel, a plate providing a fluid seal across the fluid channel, and a biasing element, which provides a biasing force to releasably retain the plate in a fluid sealing relation across the fluid channel. More specifically, the plate is disposed in a hinging relation across the fluid channel, and at least one spring provides a biasing force against the plate. When the pressure on the inlet side of the valve is great enough to overcome the biasing force, the plate hinges open, breaking the seal, and allowing the pressure on both sides of the plate to equalize.
Abstract:
The invention consists of a metal box frame into which a series of hinged louvers are fitted. These louvers consist of a metal wing section with a leading edge with an up stand or slot and a formed tab on the trailing edge that has the effect of an aileron. They are hinged on a pivot point that is offset from a point drawn from the leading edge to the trailing edge. This offset has the effect of using the weight of the louvers as a bias about the pivot point effectively holding the louvers closed and the overlap or interlinked portion together until a minimum air pressure is reached. The effective aileron on the trailing edge of each blade serves two purposes, one is to fit into a slot or up stand on the leading edge of the next blade for the purposes of protection from fire penetration and the other is to provide a mechanically advantageous position, that being the furthest point from the pivot, to best use the force of the passing air being relieved to efficiently open the vent at low pressures. One major application for this invention is to relieve the excess pressure created during the discharge of a gas suppression system. As an addition to this invention is the ability through the use of an electric or pneumatic motor to be able to control the opening of the louvers via a switching method attached to the motors. The linkage to do this has the ability to allow the louvers to open under air pressure independently of the mechanical drive fitted to the motor but also allow the opening of the louvers mechanically at choice when there is either no air pressure acting on them or there is a backwards air pressure that is acting on the louvers to hold them shut. One of the main applications for this configuration is for use in a chemical fire suppression system discharge where there is first a negative pressure created in the enclosure caused by the cooling effects of the gas discharge. It is assumed that in this additional application the vents are fitted to allow a positive pressure in the enclosure to be relieved by the free opening ability of the louvers due to the direction of the air flow acting on them and orientated accordingly. On the deployment of the gas this addition to this invention allows for the louvers to be temporarily opened mechanically so as to relieve the negative pressure in the enclosure and once that negative pressure has been released the motors disengage their drive to the louvers allowing them to shut under gravity and free to open again under air or gas pressure which can then occur in the enclosure due to the warming and therefore expansion of the gas and air inside. Note that in this invention the louvers will only open freely under air pressure from one direction and there fore the ability to add this mechanism as an add on allows for the pressure relief when the air flow would be in the opposite direction. In Diagram 6.
Abstract:
The invention concerns a valve comprising a circular frame (1) whose inner edge narrows to form flexible areas (3) connecting the frame to triangular vanes (2). The areas (3) form articulations about which the vanes pivot when the valve opens or closes. In the closed position, the vanes bear against one another and the assembly adopts a pyramidal position. The valve can be produced by the injection of plastics. The entire valve may be produced in a single part.
Abstract:
An arrangement for a compressor (20) having a suction valve (36) and discharge valve (56) is provided. The compressor (20) includes a cylinder (24) having a diametral axis (33). A valve plate (28) is positioned to cover the cylinder (24). The valve plate (28) includes a suction port (32) positioned on the diametral axis (33) and a discharge port (34). A suction valve (36) having a first end (44) is coupled to the valve plate (28) and a second end (46) is movable between a first position, in contact with suction port (32), and a second position. The suction valve (36) is arranged such that it is on an angle relative to the diametral axis (33).
Abstract:
A fluid flow actuated valve for controlling the fluid flow in a cooling conduit in an aircraft gas turbine engine, comprises a support structure adapted to be mounted within the conduit and at least one flap member pivotally mounted to the support structure. The at least one flap member is pivotable between a first position for a minimum fluid flow and a second position for a maximum fluid flow. A torsion spring is attached to the at least one flap member to urge the same to pivot against a fluid pressure differential, from the first position to the second position when the fluid pressure differential is smaller than a predetermined level.
Abstract:
A backflow preventer being disposed in the fluid conduction passage using a fan and an electronic apparatus comprising it. The backflow preventer comprises a frame, a plurality of supporting shafts arranged about the center of the frame, and a plurality of turnable plate members supported, respectively, on a plurality of supporting shafts. The plurality of plate members can move between first positions backflow preventing position located substantially in one plane and second raised positions normal operating position. The supporting shafts and the plate members are arranged substantially concentrically or radially.
Abstract:
A butterfly valve (10) includes a duct (12) defining a fluid flow path (16) and a plate-like valve member (22) pivotal in the duct to in one position span and close the latter. The valve member (22) is pivotal to a second position spanning the duct and extending parallel to the flow path to allow fluid flow therein. Means (30, 32, 34, 64, 66, 68) are provided for altering the effective area distribution of the valve member (22) about its pivot axis (20) to decrease the operating torque required by the inventive valve in comparison with conventional butterfly valves.