Abstract:
Transfer systems for receiving and conveying material such as earthen slurries discharged from vacuum excavators are disclosed. The transfer system may include a holding tank and a conveyor such as a drag-slat conveyor that extends into the tank to remove and convey material from the tank. The transfer system includes a hatch. The hatch is moveable from a closed position in which vehicles travel over the hatch to an open position in which the holding tank is open to receive material from the vacuum excavator.
Abstract:
An improved filtering system that includes a cleaning assembly and a filter element in the form of a plate or drum with a plurality of long, narrow through openings or slits in each of a plurality of rows. The improved cleaning assembly and filter element includes slit cleaning elements connected downstream of the hill and dale filter element or an improved slit cleaning element upstream of the flat surface or drum surface of a filter with upstream connecting slits. The cleaning assembly may also include a scraper cleaning element positioned for relative movement in relationship to the filter element. As fluid enters the filtering system, the debris or trash is filtered from the fluid and deposited on the upstream surface of the filter element and in the slits for removal by the cleaning assembly.
Abstract:
A wide endless-loop chain-link drilling mud separation belt formed of a plurality of laterally adjacent jointed links hinged together by transverse rods is pre-stretched prior to its installation and use on a drilling mud separation unit to prevent subsequent elongation, distortion, misalignment, chain tooth jumping, and side loading. The chain-link belt is installed on and driven in a continuous loop around a pair of parallel spaced cylindrical rollers adjustably mounted transversely in a rectangular frame of a hydraulic tensioning machine. The drive roller has a plurality of axially spaced circumferential rows of radially extending teeth that engage the openings in the links and the other roller has a smooth circumference. The drive roller and rear roller are mounted in inner front and rear tensioning frame assemblies, respectively, that are connected by hydraulic cylinders which extend and retract to move the rollers relative to one another and adjustably apply and maintain tension force in the moving chain-link belt as it is driven in a continuous loop over a period of time sufficient to achieve the desired linear expansion. In a preferred embodiment, the cylindrical rollers are formed of a metallic drum having a thick outer elastomeric layer and the teeth of the drive roller are machined into the surface of the elastomeric material to prevent metal-to-metal contact and reduce heat, wear, and friction.