Abstract:
A double valve assembly for regulating the feed of particulate material to or from a pressure vessel comprises a valve casing containing a flow-regulating valve and pressure sealing valve in series. Particulate material is fed to the valve assembly through a feed tube located at the top of the casing. The flow-regulating valve comprises a dish-shaped valve member swingable from a first position wherein it confronts the bottom of the feed tube and blocks flow of material therethrough to a second position at one side of the feed tube. The bottom of the feed tube is constructed and arranged to guide the particulate material away from the second valve position and thereby facilitate swinging movement of the swingable member from its first to its second position.
Abstract:
A high-pressure transfer device and method of utilization thereof are provided which allow flexing of the transfer device housing, and significant wear of the relatively rotatable components, without leakage. The transfer device includes a rotor having at least five diametrically through-going pockets, and enclosed by a housing having an exterior periphery and four ports disposed around the exterior periphery for registry with inlets to and outlets from the pockets. An interior screen is provided in each rotor pocket, and the rotor is cylindrical. Sealing structures are disposed between the rotor and housing around the external periphery of the rotor and interior periphery of the housing, the sealing structures maintaining effective sealing despite any relative movement between the housing and rotor, such as radial deflection of the housing. The sealing structures preferably comprise removable sealing shoes of a less wear-resistant material than the rotor. Pressure compensators for applying a force proportional to the liquid pressure at a particular point to maintain the sealing structures in sealing relationship with the rotor are provided at all of the ports, and accessory pressure compensators are provided adjacent the high-pressure ports.
Abstract:
A high pressure transfer device and method of continuously conveying hard particulate material using the high pressure transfer device ensure proper operation even under high pressure differential. The high pressure transfer device includes a pocketed rotor containing through-going pockets and a housing enclosing the rotor and having ports disposed around the exterior periphery of the housing. A structure, such as first and second jacket portions, is provided for applying a radially inwardly directed force to the housing exterior periphery roughly proportional to and opposite a force tending to deflect the housing radially outwardly so that significant deflection of the housing is prevented. The force application structure generally applies a force proportional to the pressure of high pressure liquid entering the transfer device. Such a force applicator structure may be a piston and cylinder arrangement, or bellows arrangement, with a pair of force transmitting rods interconnecting the jacket portions. The transfer device is normally mounted for rotation about a vertical axis, and deep underwater.
Abstract:
A feed wheel is provided that includes a body, a plurality of material ports formed in the body, and a plurality of outer pressure ports formed in the body. The body is operable to rotate about a central axis. The material ports are operable to receive material. The outer pressure ports are positioned radially outward in relation to the material ports. Each of the outer pressure ports is operable to receive pressurized gas when in registration with a pneumatic supply as the body rotates about the central axis. Each of the outer pressure ports are in fluid communication with a corresponding material port such that when an outer pressure port receives the pressurized gas, the pressurized gas discharges the material from the corresponding material port s out of the top surface of the body.
Abstract:
A hopper discharge valve for railway hopper cars used in transporting granular lading with the valve including a fully rotatable valve shaft having a plurality of discharging channels formed in its periphery throughout its length, with the channels being arranged so as to provide simultaneous discharge from both ends of the hopper car or from selected ends thereof.
Abstract:
Between the lower longitudinal sharp edges of inclined hopper side walls is a pivotable valve shaft having cavities for alignment with the edges to control discharge of lading into an underlying trough which terminates in cylindrical outlet tubes for pneumatic removal of the lading. The cavities have various lengths and are positioned at different circumferential positions to achieve different unloading characteristics. The trough and the outlet tubes may have about the same cross sectional area.
Abstract:
A powder valve is propose which is simple in structure and small in size, which can prevent powder from getting stuck in the valve, and can withstand high feed pressure. The valve includes a valve casing 21, a valve shaft 25, and a valve body 22 mounted in the valve casing 21 and supported by the valve shaft 25. The valve body 22 has a spherical outer surface 27 configured to be brought into contact with a valve seat 23 of the valve casing 21 to close the valve. The valve body 22 is formed with a communication hole 26 extending in a direction perpendicular to the valve shaft 25 so that when the valve body 22 is rotated about the valve shaft 25 in either of two opposite directions from the closed position, the valve is configured to open through the communication hole 26. The communication hole 26 is open on the back side of the valve body 22 over the entire length thereof. With this arrangement, it is possible to ensure the advantages of a ball valve, i.e. full-bore properties and high rigidity. Since the pressure of powder flowing through the communication hole 26 acts on the inner periphery of the valve casing 21, the flow of powder blows off and removes any powder which could otherwise get stuck on the inner periphery of the valve casing 21. By rotating the valve body 22 in both directions, powder can be removed on both sides of the valve shaft 25.
Abstract:
The device comprises a housing with a circular passage orifice, a pivoting closing element in the form of a spherical dome and a circular gasket surrounding the said orifice and mounted on an annular support axially displacable towards the closing element under the action of a pneumatic fluid, the said annular support possessing for this purpose a passive annular surface exposed to the pressure in the said housing, the active surface of the support being larger than its passive surface.
Abstract:
A new apparatus for suspending and transporting particulate material is described. The apparatus is particularly useful for transporting and depositing thermal insulation into building spaces. The apparatus includes a conduit junction having a particle inlet conduit for the particulate material, an outlet conduit and an air inlet conduit to supply air under pressure for suspending the particulate material passing into the junction, e.g. from a closed receptacle such as a plastic bag in which the particulate material is stored. The air inlet conduit provides air at superatmospheric pressure to the closed receptacle, thereby placing the stored particulate material and the interior of the receptacle at or above the air pressure in the junction. The particulate material is then able to move into the junction without traversing an air current travelling in the opposite direction. The outlet conduit carries air and particulate material away from the junction to a delivery point. The outlet conduit preferably has connected to it a delivery conduit such as the flexible hose to carry the air and particulate material to a desired location. An air pervious member or screen is preferably mounted within the junction in a suitable location to prevent particulate material from travelling out through the air inlet; and a pressure relief valve is preferably provided to exhaust air exceeding a predetermined pressure.