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JP2008057328 |
To provide a horizontal shaft pump in which the height of a rise part 42a formed on a suction pipe 42 is reduced to prevent water from flowing into a vacuum pump 52.The rise part 42a is formed on the suction pipe 42. A control means 64 s...
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JP2008055289 |
To provide an operation support system which can monitor occurrence of abnormality during operation of systems installed in a water supply and sewage plant.The operation support system 100 applied to the water supply and sewage plant has...
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JP2008057187 |
To control rain water discharge pumps and operate an inflow gate at proper timings by determining the state of flow-down/storage in a sewer while suppressing the construction cost of an overall system by eliminating the need of expensive...
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JP2008050984 |
To provide a pump equal speed control device for parallel operation of different capacity pumps reducing pushing in from a large pump to a small pump due to pump discharge variation in parallel operation of the different capacity pumps.T...
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JP2008038677 |
To provide a pump automatic alternating operation control system stabilizing alternating operation and also stabilizing stop near the target stop water level by using two submerged pumps operated and controlled by a single water level se...
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JP2008031906 |
To provide a controlled operation method for a vertical shaft pump 14 capable of executing controlled operation if water level A in a suction water tank 10 is over a lower end level B of a suction bellmouth 22.This invention relates to a...
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JP2008019724 |
To provide a safe, highly reliable, inexpensive, and economically excellent pump facility which stops a pump in a short period of time, without causing abnormality or excessive vibration in a pump by a high water head, while the pump fac...
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JP2008019731 |
To provide an easily installable automatically operable submerged pump which adjusts a preset water level, without moving an installation position of a water level detecting sensor.The water level detecting sensor for detecting a water l...
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JP2008014197 |
To provide a fluid transportation device capable of transporting fluid such as water from a lower part to an upper part.The fluid transportation device is provided with a fluid transportation pipe 11 having a fluid inlet 21 and a fluid o...
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JP2008014230 |
To provide a method and an apparatus for flow rate estimation of parallel pumps provided in a water supply system in order to estimate a total flow rate of a water supply system equipped with a plurality of variable-speed pumps which are...
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JP2008008204 |
To provide a control device for a drainage pumping station not dropping drain quantity to zero even if a failure occurs.The drainage pumping station is provided with a pump 10 and a drive machine 30 driving the pump 10, and is further pr...
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JP2008008196 |
To provide a centrifugal pump capable of finely adjusting pump characteristics of the centrifugal pump at low cost.The centrifugal pump 1 is provided with a case member 10 including a suction port 11 and a delivery port 12, an impeller 2...
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JP2008008282 |
To provide a control device of an electric fluid pump capable of determining the rotational direction of the pump.This control device of a pump part 46 rotatingly driven by a motor 47, is incorporated with the motor 47 for controlling a ...
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JP2007187002 |
To execute optimal operation in a whole range and enable highly efficient operation by operating pump workload by a control device using a flow rate sensor, a pressure sensor and a current sensor, and executing control using PWM control,...
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JP2007187067 |
To provide a water supply device using a pump rotating speed for stop determination while improving the reliability of stop determination by eliminating the need for adjusting a stop rotating speed after site installation and after a cer...
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JP2007187147 |
To provide a control method for a fan preventing noise that is audible to a user.The control method is for adjusting a rotational speed of the fan. The method includes adjusting the rotational speed of the fan within a range of rotationa...
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JP2007170309 |
To provide a control method of a pump and a water supply device, in which a pressure sensor causing increase in the number of parts is not disposed on a suction side and a constant terminal pressure maintaining control can be performed e...
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JP2007170403 |
To provide a variable water supply device capable of stably operating even if inflow pressure of a pump fluctuates, in a direct connection type variable speed water supply device.This device is provided with the inflow pipe connected to ...
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JP2007170287 |
To provide an auxiliary machine cold marine water system which can reduce the suspension allowance of a crane for maintenance, can reduce the maintenance area, and also can reduce the size of a building.A pump chamber 12, which is separa...
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JP2007162700 |
To provide a pump device for supplying a consistently stable flow amount independently of a change in pipe resistance while eliminating the need for special incidental equipment.The pump device comprises a pump casing 1, a canned motor p...
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JP2007154867 |
To provide a parallel arrangement of constant-pressure fluid-conveying devices for energy saving.The parallel arrangement of constant-pressure fluid-conveying devices for energy saving can flexibly supply a large amount of gaseous matter...
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JP3965887 |
To provide a backflow detecting system to remove foreign material from a flap valve at a discharge side by detecting the backflow from the dis charge side during shutdown period of a submersible pump. In a pump, equipped with a submersib...
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JP2007132299 |
To discharge air mixed into a casing efficiently to an outside.A method for operating a centrifugal pump installed under a condition where a center axis is inclined to a vertical direction to arrange a delivery port above an suction port...
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JP2007120449 |
To provide an electric power system of a recirculation pump and its control method capable of continuously operating two recirculation pumps in a velocity balanced state without stopping either recirculation pump even in failure or maint...
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JP2007120367 |
To easily securing high flow rate control accuracy by only linearly changing power source voltage and switching duty ratio.A pump delivering liquid by rotation of an impeller 14 by a motor 10 is provided with a control circuit 2 controll...
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JP3951263 |
To use a pressure sensor for detecting the water level inside a drain pan for controlling a drain pump and to prevent malfunction of the pressure sensor according to the setting of a position for installing the pressure sensor. This drai...
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JP3955544 |
To provide a compact washing fluid pump having a plurality of outlets. The washing fluid pump mounted on a car for an appliance for washing a window and/or a headlamp comprises an electric motor and a pump housing, and the pump housing (...
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JP3948917 |
To provide a hydraulic machine unit that can greatly contribute to energy saving and resource saving by facilitating the installation work of a hydraulic machine, and optimizing the characteristic of the hydraulic machine. This hydraulic...
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JP3947145 |
To provide a preceding standby type vertical shaft pump having a structure easily attached and assembled and enabling preceding standby operation without air lock operation nor hunting operation. The preceding standby type vertical shaft...
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JP3947670 |
To provide a cooling water supply installation capable of constantly supplying a required amount of water to each of foamed synthetic resin molding machines under the same pressure, in a molding mill equipped with a plurality of the foam...
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JP3941615 |
To easily measure axial torsional vibration in an internal pump. A vibration detector 2 for detecting radial-directional vibration, and a sound detector 3 for detecting circumferential-directional vibration are attached to a cylindrical ...
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JP3937306 |
To provide a full-water holding device for a horizontal pump which performs quick response operation during a rainfall period. In this horizontal pump wherein an opening part 3a is formed on an upper part of a pump 3, a priming detector ...
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JP3938369 |
To provide a variable speed water supply device capable of suppressing transient fluctuation of discharge pressure when a pump is additionally operated and parallel off stopped by simple control without performing complicated and difficu...
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JP2007085223 |
To provide a balance mechanism capable of self-aligning axial thrust and easily adjusting axial driving force balance.This balance mechanism comprises a casing 2, an impeller 10 secured to a rotatingly driving spindle 1, a first flow pas...
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JP2007085206 |
To provide a pump in which air biking is improved without changing a pump structure.This pump 10 comprises a motor in which a rotor 21 having a magnetic substance 28 on the inner periphery of a stator 22 is disposed rotatably and a pump ...
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JP3933586 |
To correctly judge occurrence of abnormality in bearings supporting a main shaft of a pump. A bearing monitoring device comprises an air supply pipe line 28A, 28B, 28C introducing air, which is supplied from an air compressor 21, in a cl...
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JP3933616 |
To provide a variable speed watering device which can stably operate even though inflow pressure of a pump is varied in a directly-coupled variable speed watering device. The watering device includes an inflow pipe connected to a distrib...
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JP2007071042 |
To provide a submerged pump for effectively preventing erroneous operation by a conductive sticking object.A starting water level detecting electrode 11 and a guard electrode 21 are installed in an upper part of an installation rod 9 sup...
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JP3929204 |
To simplify site work and shorten a work period by providing a discharge piping for delivering fluid by pressure from a pump to a cool/hot water unit, a transmission piping for guiding the fluid that returned from the cool/hot water unit...
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JP2007064065 |
To provide a liquid feeding device excellent in convenience of installation of a liquid feeding pump or maintenance and quickly block a passage of liquid in case of emergency, and to provide and its operation method.The liquid feeding de...
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JP2007056687 |
To provide a centrifugal pump in which unpredicted vibration generated in the axial direction of a spindle is effectively reduced.A thrust collar 20 fixed to the spindle 2 as a thrust bearing mechanism is held in a rear side bearing box ...
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JP3922760 |
To always and stably supply a specified flow rate irrespective of variation of piping resistance by comparing frequency and current under actual operation with a regulated program, and varying generated frequency of a frequency converter...
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JP2007051620 |
To provide a fluid machine-inspection method and its apparatus capable of efficiently removing a fluid for inspection adhered to a fluid machine during inspection.The flowmeter of a fuel feed pump 30 is provided with a pump-holding membe...
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JP3919896 |
To provide a centrifugal liquid pumping device equipped with a viscosity calculating function for easily and surely calculating the viscosity of liquid without using any special viscometer. A centrifugal liquid pumping device 1 is provid...
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JP2007046489 |
To provide a submerged pump miniaturizing a water level detection sensor and preventing erroneous operation due to attached matter on a detection electrode without providing a grounding electrode.The submerged pump has a capacitance sens...
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JP2007046507 |
To provide a stabilization mechanism of a balance disk which can suppress unstable vibrations produced by gap flow formed from a balance disk and balance bush.In the balance disk of a centrifugal pump equipped with a balance disk 20 whic...
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JP2007044302 |
To measure the flow rate and lift of a centrifugal pump and evaluate a circulation function during circulation assistance by the centrifugal pump.In the centrifugal pumps 10, 30, 60, 70, 80 which keeps impellers 14 rotating, the flow rat...
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JP3917835 |
To provide a pressure water feed pump system with the power saving effect. The pressure water feed pump system comprises a primary water feed pump for feeding cold water or hot water from a return header to a first feed header via a free...
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JP2007040135 |
To provide a water supply device capable of correcting a computing equation for estimated terminal pressure control coping with the change of a water level at low cost without installing a pressure sensor and a water level sensor at a su...
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JP2007023910 |
To provide an integration method for integrating pump flow rate/shaft power and an integration system for integrating pump flow rate/shaft output capable of evaluating energy saving effect by calculating shaft power/time integration valu...
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