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Matches 651 - 700 out of 3,457

Document Document Title
JP2008180222
To provide a water supply equipment exhaust device for preventing the flow of bubbles into water supply equipment during less-water-amount operation of the water supply equipment without the need for changing the water supply equipment.T...  
JP2008180163
To carry out bubble biting determination at low cost by using an induction motor.By providing the induction motor 11 having a plurality of windings including a winding 31 with a phase advance capacitor 12 connected in series thereto, and...  
JP2008180162
To carry out bubble biting determination at low cost by using an induction motor.By arranging the induction motor 11, and an electric variable detection means 17 receiving a signal including harmonic components increased when bubble biti...  
JP2008151269
To provide a pressure container safety device having simple construction for releasing abnormally high pressure to the outside and easily restoring it even when the pressure in a pressure container becomes abnormally high.In a side wall ...  
JP2008128000
To provide a pump device capable of accurately detecting whether a liquid is present or not in a pump during a steady state operation.This pump device comprises the pump 10 having an impeller and a pump casing 10a, a drive source 15 for ...  
JP2008115822
To provide a pump operation control method of a water supply device capable of uniformizing the integral operation times of respective pumps while carrying out a rotation drive of numbered pumping machines.In the pump operation control m...  
JP2008101561
To provide a control device for a fluid pump, which can release a motor lock state.When the motor lock state is detected in starting of a fuel pump 11, an armature coil 21 is electrified in a first non-rotating pattern set in advance. Th...  
JP2008101556
To solve the problem of a conventional pump device, in which performance of the pump device is not sufficiently utilized because an operating condition of the pump device is determined in view of a worst installation condition.A control ...  
JP2008082318
To propose optimization of auxiliary circulation of fluid in a pump for improving the performance level of a balancing system and flow for cooling.Circuits for the auxiliary circulation of fluid in the pump for the axial balancing and th...  
JP2008082316
To provide a pump with an excellent axial balancing system capable of generating bigger axial lifting force.The pump (10) for sucking a fluid, comprises at least one centrifugal wheel (14) having a fluid inlet edge (48) and a fluid outle...  
JP2008075595
To easily and precisely measure a drainage volume of a precedence standby type vertical shaft pump including an air and water mixed operation condition.If a suction water lever TP measured by a water level sensor 11 is higher than an upp...  
JP2008076291
To easily and precisely measure a displacement of a precedence standby vertical shaft pump including a gas-water mixed operation.The displacement Q is calculated based on a suction water level TP measured by a water level sensor 11, a de...  
JP2008069652
To provide an automatic unit number control device and its method, for surely preventing simultaneous start, and easiness in setting time of a timer.This automatic unit number control device is composed of a level gauge 3 detecting a wat...  
JP2008063982
To secure a stable water quantity and pressure when operation is conducted while a plurality of pumps having different displacement are changed over, and establish such a condition as is free of the pump shutoff state so as to assure a s...  
JP2008063954
To provide an abnormality diagnostic method of a drainage pump and its device, without requiring much labor, by properly, easily and visually confirming a secular change in performance reduction and a changing tendency of a determining v...  
JP2008064064
To provide a pumping installation and the operating method thereof capable of appropriately controlling the quantity of flow of a pump for taking-in seawater through a dust collector provided in a sea area.This pumping installation 1 ins...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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 ...  
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,...  
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...  
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...  
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...  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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 (...  
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...  
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...  
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...  
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 ...  
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 ...  
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...  
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...  

Matches 651 - 700 out of 3,457