A method operates a thick-matter pump having a thick-matter delivery system and a hydraulic drive system. The thick-matter delivery system delivers thick matter with a variably settable delivery volumetric flow rate for driving the thick-matter delivery system. The hydraulic drive system has: a hydraulic circuit having a hydraulic fluid, a variably operable first drive pump, and a variably operable second drive pump. The first drive pump is designed for variable operation with at least one variably settable first pump parameter and the second drive pump is designed for variable operation, independent of the first pump parameter, with at least one variably settable second pump parameter for generating a variably settable overall drive volumetric flow rate of the hydraulic fluid in the hydraulic circuit. The method determines an overall-drive-volumetric-flow-rate target value for the overall drive volumetric flow rate, and determines a first parameter target value for the first pump parameter and a second parameter target value for the second pump parameter in a manner dependent on the determined overall-drive-volumetric-flow-rate target value. The first and second parameter target values differ from one another if the determined overall-drive-volumetric-flow-rate target value is in at least one overall-drive-volumetric-flow-rate-target-value range from a set of possible overall-drive-volumetric-flow-rate target values. The method delivers the thick matter with the delivery volumetric flow rate at a delivery-volumetric-flow-rate target value by generating the overall drive volumetric flow rate with the determined overall-drive-volumetric-flow-rate target value by setting the first pump parameter to the determined first parameter target value and the second pump parameter to the determined second parameter target value.

A multi-pump apparatus can include a pump unit including two or more motorized pumps, wherein each of the two or more motorized pumps can include a stator and a stator exit. The multi-pump apparatus can further include a plurality of stator exits including each stator exit of each stator of the two or more motorized pumps, and a group of adjustable hoses, wherein the two or more motorized pumps of the pump unit are operable to inject a dense fluid from the plurality of stator exits through the group of adjustable hoses.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

A powder supply apparatus, comprising a powder receiving device which receives powder, a hopper for storing powder that has an outlet at the bottom thereof, a screw feeder which is provided at the outlet of the hopper, has an extrusion port, and pushes the powder received from the outlet of the hopper toward the extrusion port by a screw. The powder supply apparatus also has a diaphragm pump having a suction port and a discharge port, and discharges air sucked from the suction port to the discharge port by an operation of a diaphragm. An atmospheric passage communicates the suction port of the diaphragm pump with the atmosphere. A communicating passage communicates the discharge port of the diaphragm pump with the powder receiving device. The extrusion port of the screw feeder is positioned within the atmospheric passage so as to supply the powder to the atmospheric passage.

A pump (1) comprising a lubricant reservoir (3) which feeds at least one pumping element (2), the reservoir (3) being delimited by a base (4) in correspondence with which, inside the reservoir (3) there is a rotating spatula (5) featured, equipped with at least one blade (5A) which, by rotating over the base (4), conveys the said lubricant towards an intake (2A) in the said pumping element (2) pushing the said lubricant through a plurality of passages (4A) made in the surface of the said base (4).

A pump for high viscosity materials is mounted on a rectangular frame that fits through a standard doorway. Quick detach latches allow removal of the grate, the hopper or the console, including the control box, from the frame for safer and lighter transportation of the pump. Extendable handles facilitate lifting, moving, and storing the pump. Pivotable wheels with locking mechanisms allows the pump to be moved in any direction by a single user.

The invention relates to a thick material pump having a first delivery cylinder, a second delivery cylinder and an additional cylinder. The additional cylinder serves for bridging a transition between the first delivery cylinder and the second delivery cylinder. The thick material pump comprises a movable tube portion which forms a connection between the first delivery cylinder and an outlet of the thick material pump in a first state and which forms a connection between the second delivery cylinder and the outlet of the thick material pump in a second state. The movable tube portion comprises a switchable closure which is arranged between an inlet end of the movable tube portion and the additional cylinder. The thick material pump according to the invention makes it possible for a uniform material flow to be delivered in the direction of the pump outlet.

Mixed concrete is pumped under pressure along a primary flow path to a typically lengthy supply line. In the event a clog, blockage or other supply line concern is detected, a branch conduit in communication with the primary flow path permits a portion or all of the pressurized flow to pass through a diverter valve and a recirculation conduit back into an open-to-atmosphere reservoir or hopper from which the concrete originally was pumped. The recirculation system of this invention permits supply line pressure to be safely regulated, diminished, relieved and jogged, all without there being any need to discharge or waste valuable mixed concrete, and without having to dangerously open one or more connections of a pressurized supply line.

A system for monitoring a dual cylinder concrete pumping apparatus and a transition valve operated by an actuator. The system including position sensors to detect the position of pistons in the dual cylinders and the actuator. Additional sensors can monitor various aspects of the concrete pumping apparatus. A processor receives information from the sensors and transmits data to a monitor. When sensor data is outside of predetermined parameters, the processor sends an alert notice and a performance snapshot of the system to the monitor.