Abstract:
A drill cuttings conveying head for a portable drill rig includes a flexible tubular duct portion which is operable in conjunction with extension and retraction cylinders for the head to bend the duct portion sufficiently to permit retraction of the head to provide suitable ground clearance for transport of the rig. An actuator for bending and straightening the flexible duct portion is interconnected by way of a pressure fluid control circuit with the head extension and retraction cylinders for movement of the duct portion in conjunction with the extension and retraction of the conveying head.
Abstract:
A drill cuttings conveying head member having a tubular duct portion which includes a movable sidewall forming a gate operable to be pivoted into a position blocking the flow passage in the duct portion and diverting the flowstream out of the conveying head during wet drilling conditions. A lever mechanism is connected to the gate and is operable to bias the gate in either the open or closed position.
Abstract:
Single and multiple porous media impingement type air filter elements are disposed in filter housings which provide access to the filter elements from top opening doors or plenums in the housing for service or repair of the elements. Housing sections defining the plenums are provided with mechanism to lift and swing the housing sections clear of the filter opening, and the housing sections are movable to relieve excess working pressure differentials across the filter element. In two embodiments the filter elements are each in sealing engagement with a shield which is also sealingly engaged with a top wall or door of the filter housing to minimize contamination of personnel servicing or replacing the filter elements. Clean air is discharged through a downwardly extending clean air flow tube into a discharge plenum or chamber and particulate material separated from the air flow stream falls into a material collecting hopper portion which may be defined in part by a sloping wall separating the clean air flow chamber from the particulate material collection chamber. Filter element backflushing air control valves may be located in the bottom of the filter housing to enhance the accessibility of the filter elements from the top of the housing and to minimize overall height of the filter apparatus.
Abstract:
A porous media air filter unit for a power sweeper includes an impingement or barrier type filter element mounted on a combination support plate and clean air discharge plenum which redirects the filtered air flow at right angles relative to the central axis of the filter element. Multiple reverse jet backflushing air discharge manifolds are mounted generally alongside the filter element and at the outlet of the clean air discharge plenum for directing plural jets of reverse flow filter cleaning air into the plenum for periodically cleaning the filter element. Reverse jet cleaning air is supplied to a supply manifold by a compressor onboard the power sweeper. The supply manifold forms a wall of a housing forming a clean air chamber and supports an array of reverse jet air discharge manifolds and pilot operated control valves. The clean air plenum may be provided with interior partitions to separate the plenum into a plurality of separate flow passages for conducting clean filtered air in one direction and reverse jet cleaning air in the other direction to maximize cleaning air energy for dislodging particulate material from the filter element. The filter element includes removable divider plates for dividing the element clean air chamber into plural chamber segments.
Abstract:
A reverse air jet cleaning system for impingement or porous media type air filter elements includes one or more specifically shaped cleaning air manifolds or heads in which a plurality of jet nozzles or orifices are arranged in a predetermined pattern to provide a totally enveloping air jet which is discharged into a flow tube immediately downstream of the clean air flow chamber of a generally tubular filter element. The jet pattern provides a temporary pressure seal within the flow tube and entrains a substantial amount of ambient air into the reverse flow jet to thoroughly flush or flood the filter element to clean the dust cake from the exterior surface of the element. The multiple jet arrangement reduces the overall space occupied by the reverse jet cleaning system and provides a larger mass flow of cleaning air to thoroughly flush the surfaces of the filter element. The multiple jet orifice heads or manifolds may be configured in virtually any geometric shape to provide the desired jet pattern and are not limited to use in conjunction with cylindrical tubular type filter elements.
Abstract:
An air filter unit has a housing including a plurality of separate filter element chambers disposed side by side and each including openings to an elongated air inlet chamber. Each of the filter element chambers includes a porous media filter element for receiving a portion of a material laden air flow stream entering the housing in such a way that the lower velocity portions of the flow stream are diverted into the respective filter element chambers and forced to flow in a vortical manner to provide inertial separation of material prior to flow of air through the filter elements. The inlet air flow is directed against a wall of the inlet chamber at the end opposite the inlet end of the inlet chamber so that higher velocity portions of the inlet air flow stream impinge the wall to separate particulate material entrained with the higher velocity portion of the flowstream. Separate hoppers in the inlet chamber and the filter element chambers are in communication with each other through a one way door which conducts separated material from the inlet chamber through one or more of the filter element chambers and through a second door for discharge to the exterior of the housing.
Abstract:
A conveying and collection system adapted for drilling rigs for conveying drill cuttings entrained with a bailing air flow stream emanating from the drillhole includes a generally tubular head fitted around the drillhole having a flow deflecting surface portion adapted to deflect the flow stream of drill cuttings into a conveying enclosure whereby velocity reduction and change of direction of the flow stream will separate relatively coarse cuttings. A mechanical conveyor may be disposed in the enclosure to convey the cuttings to a point remote from the drillhole. The head may be extended and retracted with respect to the drill rig deck plate by actuators controlled in accordance with the conduction of bailing air to the drill stem. One embodiment of the head comprises an enclosure formed by overlapping helical convolutions of a flat spirally coiled band. The head may be provided with retractable gate members remotely actuated to move clear of an opening in the head which is of sufficient size to permit movement of drill stem coupling members and/or the drill bit through the head during drilling operations. A filter unit has a plurality of separate filter element chambers in which are disposed porous media filter elements arranged side by side along the flow path of a bailing air flow stream entering the filter unit housing so that the lower velocity portions of the flow stream are diverted into the filter element chambers and forced to flow in a vortical manner to provide inertial separation prior to flow through the filter elements. A suction pump on the filter unit is operable to vary its inlet volumetric capacity to provide a partial vacuum condition throughout the collection system to minimize leakage flow of dust laden bailing air out of the system.
Abstract:
An electrostatic dry powder coating spraying system has a multi-color powder coating recovery system comprising a plurality of vertically extending cyclonic filter barrels laterally spaced about a central vertical axis and having vertically aligned upper ends. A single filter cleaning apparatus, including a filter backflushing system, is adapted to rest upon and operatively engage any selected one of such upper barrel ends, and is operative to backflush the filter within the barrel upon which it rests. Oversprayed powder from the spraying system is reclaimed by drawing it through the "active" filter barrel to which the filter cleaning apparatus is connected. To effect a rapid powder color changeover in the recovery system, the filter cleaning apparatus is mounted on a vertically extending support mechanism which is operative to move the filter cleaning apparatus upwardly from its filter barrel, permit the elevated filter cleaning apparatus to be pivoted into alignment with a second filter barrel, and then lower the pivoted filter cleaning apparatus into operative engagement with the second filter barrel.
Abstract:
A non-pressure balanced fluid conducting swivel joint for coupling high pressure hydraulic conduit comprised of first and second tubular housing sections which are coaxially interfit with each other and a tubular sleeve member supported intervening between superposed portions of the housing sections. The sleeve is secured thrust resistant and for rotation to the inner of the housing sections via a pair of spaced apart annular races containing bearings extending between the inner housing section and the sleeve member. The outer housing is rotationally interlocked with the sleeve member by virtue of a flexible circumscribing pin engaging an insert contained in an annular groove complementary formed between the outer periphery of the sleeve member and the inner diameter of the outer housing. An external slot permits insertion and removal of the driving pin that includes a tang at its outer end which when the pin is operably contained in the groove can be removed for disassembly of the housing sections to effect servicing of the internal seal. An external sleeve when mounted about the slot of the outer housing serves to shroud the slot and tang from ready access so as to minimize tampering and potential environmental damage.
Abstract:
Disclosed is a rotary broom hopper which includes a container having a bottom wall, a front wall, a rear wall, and a top wall. A dust and debris inlet is positioned between the bottom wall and the rear wall and a filter element is positioned between the rear wall and the top wall. A first interior wall extends into the container from the rear wall between the inlet and the filter element. A second interior wall is positioned between the first interior wall and the filter element such that the first and second interior walls form a secondary material separation chamber interior of the container. An impingement plate is positioned to extend perpendicular to the top wall into the secondary material separation chamber. The impingement panel causes an abrupt reversal of direction of air flow and deposits a substantial quantity of particulate matter in the secondary material separation chamber and thereby reduces the accumulation of such material on the filter element.