Patent RU-94039512-A (RU)
Inventor: USHAKOV G G
IPC: F04B47/04
Filed: 1994-10-20
Abstract: FIELD: cleaning of industrial settling basins from silt and sludge, including those with radioactive fallouts. SUBSTANCE: bottom dredge pump is plant of special design mounted on floating base made in form of catamaran, with telescopic rod vertically secured in its center. Pumping unit is mounted on end of rod. Operator's cab, winches to move bottom dredge pump over water surface and winch to lift telescopic rod with pumping unit. Pumping unit has hinge-mounted dome on its lower end. Other end of pumping unit is connected by flexible hose with place of soil loading on vehicle or with place of soil treatment. Hoses are kept afloat by pontoons. Pumping unit sucks in viscous silt and breaks hard sediments by its activators. Pumping unit has two cups. Inner cup has two pneumatic cylinders with rods pointed to each other and provided with common rod. Covers of pneumatic cylinders are united to form common bridge which has channels to deliver compressed air into both rod spaces. Rodless space of upper pneumatic cylinder communicates with atmosphere, and lower space serves as vacuum chamber. Vacuum is built in chamber when piston moves upwards. Vacuum chamber is provided with intake ports. Cups of pneumatic cylinders have common axle. Cups displacing relative to each other open or close inlet into vacuum chamber. Turning of cup is provided by pneumatic cylinder. Rod of pneumatic cylinder is hinge-secured on one cup, and body of pneumatic cylinder, is fastened on other cup. Displacement of cups is controlled by stops. Pipe with check valve is secured in pneumatic cylinder in center of bridge. Dome mounted on pneumatic cylinder covers soil suction zone from top and sides. Knives are secured on dome. Similar knives are secured on axle of inner cup of pneumatic cylinder. At relative displacement of cups at opening or closing, knives move and ripple viscous and solid bottom sediments to condition in which they can be sucked into vacuum chamber. Vacuum chamber and check valve provide sucking in and lifting pebble, diameter up to 60 mm, to floating base surface. Pneumatic or electric vibrator is secured on dome. Telescopic rod has number of square spaces. Pumping unit is secured on lower square space housing. Pipe with check valve is secured in center of pumping unit. Pipe is hinge-connected with flexible hose. To regulate dome-to-bottom force, special ports closed by shutters are provided on dome. These shutters are remote-controlled. Bottom dredge pump is mounted in floating base. Winch wire ropes are fastened on bank, slack is taken up and bottom dredge pump controls are connected to computer. Telescopic rod with pumping unit is lowered to bottom of basin and compressed air is fed into pneumatic cylinder. Piston, when rising, sucks soil into vacuum chamber and when lowering, forces it through check valve into pipe. When zone covered by dome is cleaned from silt, lift winch is switched on and pumping unit is lifted together with dome and bottom dredge pump through size of dome. Then dome is again lowered to the bottom and cycle repeats. EFFECT: enlarged operating capabilities. 3 cl, 2 dwg