A high-volume low pressure axial flow water pump with a flexible coupler and at least one bearing to increase the lifetime of the integral pump motor is disclosed. Both propeller and impeller units are disclosed for submersible pond pumps of the present invention. Various aspects include a floating display fountain pump and further include optional suction screens and/or sand slingers. Axial flow high pressure low volume pumps made in accordance with the present invention experience long life and higher efficiency. Inclusion of flexible couplers alleviate many problems with vibration and other fatal defects in the prior art, taking a vertical rotational direction from a central shaft to transfer vibration to a stable position. Another aspect of the invention includes using multiple bearings for stability, whether sleeve bearings or thrust bearings.

A mobile emergency water supply and drainage device is provided, which relates to the technical field of emergency rescue and disaster relief equipment. The device includes a submersible pump, relay pumps, and an electric power supply device for providing electric power for the submersible pump and the relay pumps. Frequency conversion control cabinets are arranged between the submersible pump as well as the relay pumps and the electric power supply device, and the submersible pump and the relay pumps are connected in series by pipelines for remote water supply and drainage. The device further includes a floating body for suspending the submersible pump in water, and the floating body floats on a surface of the water and is connected with the submersible pump through a lifting chain.

A mobile emergency water supply and drainage device is provided, which relates to the technical field of emergency rescue and disaster relief equipment. The device includes a submersible pump, relay pumps, and an electric power supply device for providing electric power for the submersible pump and the relay pumps. Frequency conversion control cabinets are arranged between the submersible pump as well as the relay pumps and the electric power supply device, and the submersible pump and the relay pumps are connected in series by pipelines for remote water supply and drainage. The device further includes a floating body for suspending the submersible pump in water, and the floating body floats on a surface of the water and is connected with the submersible pump through a lifting chain.

An evaporator is provided for evaporating water from an ambient body of water having a water surface. The evaporator includes a housing that has a proximal end proximate to the water surface, a distal end distal to the water surface, and a housing air flow channel directed toward the water surface. The housing is disposed on a support, such as a float assembly, that positions the housing above the water surface. The evaporator also includes an air flow induction device, preferably an impeller, disposed to direct an air flow stream from the distal end toward the proximal end through the housing air flow channel and toward the water surface so that the air contacts the water. The impeller preferably is made of a fiberglass material. The support preferably includes at least one float assembly air flow channel that receives the air flow stream from the housing and directs it outwardly from the evaporator. Water injection devices such as spray nozzles or atomizing nozzles preferably are disposed in the float assembly channel or channels to inject the water into the air flow stream.

Certain exemplary embodiments can provide a system, which comprises a pump and a platform. The platform comprises a set of flotation tubes, a pump tube, and an encasement. Each of the set of flotation tubes is constructed to add buoyancy to the platform. The pump tube constructed to be coupled to the pump and house the pump. The encasement substantially surrounds a portion of the pump tube and a portion of at least one of the set of flotation tubes.

Certain exemplary embodiments can provide a system, which comprises a pump and a platform. The platform comprises a set of flotation tubes, a pump tube, and an encasement. Each of the set of flotation tubes is constructed to add buoyancy to the platform. The pump tube constructed to be coupled to the pump and house the pump. The encasement substantially surrounds a portion of the pump tube and a portion of at least one of the set of flotation tubes.