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JP2009052524 |
To provide a water supply pipe direct connection pump device operating a pressurizing pump only when a water pressure of water supply is not greater than a reference pressure with a simple structure.When a water pressure from the water s...
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JP2009047125 |
To provide a water supply apparatus using a plurality of pumps driven by a plurality of variable speed drive means and using the variable speed pumps suitable for automatically creating parameters and an operational expression required f...
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JP2009047119 |
To more precisely determine an abnormality in a flowmeter of a water supply equipment in which water is supplied intermittently.The water supply equipment has a water-supply pump 5 provided on a water supply pipe 4 to supply water interm...
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JP2009041450 |
To provide an electric pump for cooling an internal combustion engine, etc. capable of sufficiently improving warming-up performance at cold start of the internal combustion engine.By the electric pump 11 enabling bidirectional suction a...
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JP2009041500 |
To provide a pump device capable of being attached without changing installation piping and of carrying out variable speed operation control such as constant pressure control by a pump single body.The pump device having a pump part 10 pr...
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JP2009024935 |
To provide a system for controlling a circulating pump so that a temperature difference between an intake and a water discharge port does not exceed a pollution prevention agreement value in a cooling system utilizing seawater as cooling...
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JP2009011767 |
To solve the problem that a recently noticeable turbo pump is smaller and lighter in weight than a conventional pulsatile pump mainly used in an artificial heart pump, however, has a demerit that a blood flow is unstable, especially ther...
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JP2009006158 |
To provide a fire pump apparatus which allows a sure and effective action under disadvantageous conditions in a disaster.The fire pump apparatus has a motorized pump 10 to convey water with pressure, a main pipe 52 attached to the discha...
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JP2009007964 |
To provide a centrifugal pump capable of relaxing a thrust load generated by negative pressure on a suction port side and applied toward a suction port side of a pump case from an impeller, of extending life, and of being efficiently dri...
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JP2009008035 |
To provide a variable speed water supply device having a plurality of motor pumps driven at a variable speed, and performing stable additional operation with reduced pressure fluctuation.The variable speed water supply device comprises: ...
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JP2009008091 |
To provide a fire pump device surely and effectively operating under unfavorable condition when an accident occurs.This fire pump device includes: an electric pump 10 pressurizing and feeding water; one or a plurality of water discharge ...
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JP2009007959 |
To provide a centrifugal pump capable of relaxing a thrust load applied toward a suction port side of a pump case by a simple structure without arranging a balancing hole nor a rear blade on an impeller, and of extending the life of the ...
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JP2009002303 |
To provide a water supply system which uses a plurality of pumps driven by a variable speed driving means, which can prevent an inverter trip, and which can perform smooth parallel operation of a plurality of pumps without causing any dr...
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JP2009002162 |
To provide a drainage pump device capable of securing a predetermined drainage flow rate while avoiding an overloaded state of the drainage pump and operating at the original drainage flow rate of the drainage pump in the case where fore...
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JP2008309023 |
To provide a cavitation detecting method for appropriately detecting cavitation.The cavitation detecting method detects cavitation occurring in target equipment with fluid. The method includes a step for acquiring vibration data of the t...
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JP2008280921 |
To obtain a DC pump inspection device easily inspecting performance of a DC pump in an incorporated state in a product while observing constraint concerning drive of the pump.The pump inspection device comprises a control section 1 for d...
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JP2008274761 |
To provide a pump control device capable of controlling fluctuation of water-distribution pressure in re-starting a pump stopped during the water-distribution pressure control by a plurality of parallel pumps.The pump control device 1 ha...
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JP2008255911 |
To solve a problem in which a pump device frequently repeats a start and a stop even if a customer does not use water when water slightly leaks from the pump device to a delivery side pipe.The pump device is provided with a pressure sens...
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JP2008248851 |
To eliminate risk of sudden change of flow rate and unstable flow rate control.A fuel pressurizing pump is formed by connecting four small capacity pumps in parallel. When a second small capacity pump, a third small capacity pump, and fo...
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JP2008223589 |
To provide a hot water supply device, in which circuit breakage caused by increase in water temperature in a pump for the hot water supply device in increase in water temperature and increase in the temperature of a motor winding is prev...
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JP2008208807 |
To provide pump equipment in which foreign substances in a pump casing can be easily removed with the pump equipment fixed.The pump equipment is equipped with a motorized pump 13 which conveys sewage water 12 inside a manhole 11. A water...
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JP2008202555 |
To shirk the danger of suspension of water supply and the burst of piping due to the generation of pressure imbalance, when a water supply amount is abruptly increased/decreased, in a water supply device equipped with a controlling funct...
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JP2008202556 |
To improve system reliability by constructing an n-multiplex system autonomous distributed control system in a water supply device using a plurality of pumps driven by a plurality of variable speed driving means.Inverter main body 1-2 on...
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JP2008202553 |
To prevent unnecessary lock releasing control when an electric water pump is locked.The control device for the electric water pump comprises a lock releasing controlling means, and a restarting controlling means. The lock releasing contr...
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JP2008190401 |
To provide a reliable pump which can control a flow rate with a simple structure at a reasonable cost.By referring to a current value-exhaust flow rate relationship (4,000 rpm) 64 stored in a judgment reference storage means 6, an exhaus...
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JP2008186266 |
To provide the operation controller for a drainage pumping station which can optimally control the drainage from a tributary river to a main stream river, by appropriately controlling the operation of a sluice gate and a drainage pump du...
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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...
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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...
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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...
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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 ...
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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 ...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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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