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Matches 751 - 800 out of 6,949

Document Document Title
JP2014055532A
To provide a water supply device capable of managing a starting frequency of a pump to a prescribed value, and excluding a wasteful operation while equalizing operation loads in operating a plurality of pumps.A water supply device in whi...  
JP5443645B1
[Subject] In a device which performs operation and a stop of a submerged pump using the conventional water level sensor, and controls at least drainage tank water, a water level sensor breaks down well by drainage, water level control ca...  
JP2014043838A
To provide a feed-water pump and a full water level detecting method of the feed-water pump capable of properly judging whether an internal part of a pump body arrives at a full water level when performing the priming water even in the c...  
JP2014043800A
To provide a pump control device in which an additional inverter device can be easily installed at low cost and that can continue pump operation even if a state quantity measuring device such as a pressure sensor fails.A first inverter d...  
JP5439378B2  
JP2014037776A
To provide a technique for removing a foreign body caught between an impeller and an inner wall opposed thereto in an electric pump.An electric pump 2 comprises: a motor 10 having a rotor 6 that is axially movable by a predetermined dist...  
JP2014037840A
To provide a fire pump device that can work reliably and effectively under disadvantageous conditions when a disaster occurs.A fire pump device comprises: a pump 10 for supplying water to water discharge means 50 provided to a pipe on ea...  
JP2014037807A
To provide a double suction volute pump for low-load starting that can start an electric motor by a reduced-voltage starting method.A double suction volute pump for water comprises: an impeller rotating about an axis line; and a casing i...  
JP5427620B2  
JP2014031796A
To provide a water supply device that can prevent water hammer from occurring in a case where a pump is activated first after a water supply device stops due to power failure or failure of the water supply device.A water supply device 1 ...  
JP2014031749A
To provide a pump device which makes the output of a high efficiency electric motor equivalent to the output of an existing electric motor by a controller, and which automatically controls to prevent the increase of power consumption, ev...  
JP5417147B2  
JP5412173B2  
JP5408707B2  
JP5410385B2  
JP2014020230A
To reduce windage loss in a motor unit that includes a plurality of motors and a pump system that includes a plurality of motors.A plurality of pumps (20, 20) is provided such that respective inlets (21) are connected to a common pipe (4...  
JP2014015902A
To provide a pump unit capable of ensuring redundancy without using a plurality of pump unit.The pump unit provided in a pipeline for feeding a liquid at a preset unit flow rate, comprises n+1 pumps and a constant flow rate valve. The pu...  
JP5400117B2  
JP5396504B2  
JP5395944B2  
JP5386419B2  
JP5386210B2  
JP2013256926A
To provide a drainage pump that can easily and reliably drain foreign matter by stopping a motor or reversely rotating the motor when the foreign matter is sucked into the drainage pump, and to provide a method of controlling the drainag...  
JP2013256867A
To provide a water feed system configured to solve problems by enabling a water feed system side to have a pressure target value, an initial inverter frequency (target flow rate) and a function for designating the number of necessary pum...  
JP2013256869A
To provide a water supply pump device, capable of controlling the stop of a water supply pump when the water amount is excessively small, and controlling the pressure fluctuation when restarting the water supply pump.A water supply pump ...  
JP2013256868A
To provide a water feed pump device suppressed in an excessive/insufficient water amount stop and a pressure variation at restart.In a water feed pump device, a variable speed control device has: upper limit target pressure on a piping r...  
JP5371673B2
To provide a full water level detector provided with a countermeasure against rusty water that can be equipped to a pump installed outdoors. In a body housing 10, an air passage and an electrode bar chamber 12 including two or more elect...  
JP5364043B2
To provide horizontal shaft pump equipment capable of suppressing starting current of an electric motor serving as a driving machine, completing a water filling process in a short time, and allowing a draining operation at an early stage...  
JP5356180B2
To provide a highly reliable pump facility and an operating method, by preventing turbulence of a flow near an intake port caused by back-flow in a suction part, smoothly sucking air therein to shorten the starting time, and thereby impr...  
JP2013543074A
The invention relates to a Francis-type pump, comprising the following features: a blade wheel; a spiral housing; a suction pipe; a counter-swirl generator which is arranged in the inlet to the blade wheel and which can be activated duri...  
JP5348752B2  
JP5347171B2  
JP2013227975A
To enable estimation of a characteristic value (pressure, flow rate) of a pump circuit with an extremely high degree of certainty independently of a standard pump curve without the use of a sensor within a pump circuit.In relation to a m...  
JP5337290B2
To calculate a characteristic value of a pump with high accuracy without measuring operation characteristic data of the pump in advance. A device for calculating a pump characteristic value includes: a reference operating point identifyi...  
JP5337289B2
To calculate shaft power and consumption power required when a pump is operated at an optional operating point based on a pump characteristic value indicating the optional operating point. A reference flow rate calculation part 16A calcu...  
JP5336790B2
To certainly detect drought by solving the following existing problems: when muddy water or the like is used in a circuit detecting the drought, a motor current value is varied by a cause different from the drought, a conductor and an en...  
JP2013217275A
To provide a low-cost water supply system with improved maintainability and simple system configuration, while enabling easy pump operation control, and to provide an operation method of the water supply system.A water supply system incl...  
JP2013217274A
To provide a water supply system capable of increasing and reducing the number of pump devices in response to an actual load by maintaining precise detection of a water supply pressure.In a water supply system, n pump devices each includ...  
JP5323796B2  
JP5318263B2
To provide a method for starting a water supply system that can eliminate a lack of water supply pressure caused in such a case as when flush valves for flushing toilets in facilities such as a school are used simultaneously. The water s...  
JP5312600B2
Disclosed is a slurry pump that is capable of preventing the rotation of an impeller from being restricted by the solidification of slurry within an impeller casing when the slurry pump isn't operating. The slurry pump, which pumps store...  
JP5313848B2
To perform change control of a set differential pressure and a set water supply pressure without causing problems even in a system having both an inverter pump and a constant-speed pump. A lower limit set value change function of inverte...  
JP2013204531A
To provide a magnet pump device capable of preventing a large electric current from flowing in the beginning of start-up.A magnet pump device includes a pump casing 4 having an inlet 24 and an outlet 28, a driving magnet 8 arranged outsi...  
JP2013199839A
To provide a manhole pump device, having a simple and inexpensive constitution and capable of controlling generation of scum and also breaking the generated scum.A manhole pump device 10 discharges dirty water flowing into a water storag...  
JP5306284B2
To provide a pump device capable of highly reliability forming a self-siphon and performing siphon destruction at a low equipment cost using a simple piping system in which an electrically-operated valve requiring control is not required...  
JP5306881B2
To provide a control device for a manhole pump device that prevents the occurrence of foreign matter tangling in an impeller and blocking inside a pump casing by accumulating without increasing a starting frequency, and a control method ...  
JP2013194583A
To improve measuring accuracy of the output quantity of a liquid-state substance.A liquid feed device is configured to output a liquid-state substance stored in a storage section from an output port. The liquid feed device includes: a li...  
JP2013194603A
To provide a forced drainage pump which is easily retro-fitted to an existing drainage apparatus and capable of enhancing the flexibility of construction of a water section facility.A side part space 55 is partitioned into a storage cham...  
JP2013194610A
To provide a pump, a pump system, a method of controlling the pump, and a cooling system that prevent an impeller from becoming an obstacle of a flow channel.A pump includes: an impeller for moving fluid; a housing section that is provid...  
JP2013190199A
To provide a system and method for controlling characteristics of a solids feed material in a solids feed pump.A system includes a solid feed fuel pump configured to route a solid fuel flow from an inlet to an outlet. The solid feed fuel...  

Matches 751 - 800 out of 6,949