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1. 发明专利

JPH10121438A DUST COLLECTOR OF DRAIN SYSTEM 失效
公开(公告)号：JPH10121438A
公开(公告)日：1998-05-12
申请号：JP29738096
申请日：1996-10-18
申请人： HITACHI LTD , HITACHI KIDEN KOGYO KK
发明人： YODA HIROAKI , YOSHIKAWA YOSHIHIKO , MATSUI SHIRO , HATANO HITOSHI , YAMAGATA TETSUO , MUTO EIICHI
IPC分类号： E02B5/00 , E02B5/08 , E03F1/00
摘要： PROBLEM TO BE SOLVED: To provide a dust collecting facility of a drain system capable of certainly preventing lowering of drain performance of the drain system with high reliability while in simplified structure. SOLUTION: A dust collector of a drain system is provided with a screen for dust collection to prevent inflow of dust to a pump water suction tank of a drain pump set on a drain system consisting of a main water channel gate 3 provided on a downstream part of a main water channel 1 and a by-pass water channel 4 branched from the main water channel 1 and provided with the drain pump and a by-pass water channel gate 6. In this case, a garbage reservoir water channel communicating the upstream and the downstream of the screen fro dust collection to each other is formed, and a screen for garbage outflow prevention is set in the neighborhood of a communicating part of the downstream of the garbage reservoir water channel and the by-pass water channel 4.

2. 发明专利

JPH108437A DUST PROTECTION EQUIPMENT FOR DRAINAGE SYSTEM 失效
公开(公告)号：JPH108437A
公开(公告)日：1998-01-13
申请号：JP16319496
申请日：1996-06-24
申请人： HITACHI LTD
发明人： YODA HIROAKI , MANABE AKIRA , MATSUI SHIRO , YOSHIKAWA YOSHIHIKO
IPC分类号： E02B8/02 , E02B5/08
摘要： PROBLEM TO BE SOLVED: To provide dust protection equipment, by which lowering of drain performance of a drainage system can be prevented so as to keep high reliability. SOLUTION: A rotary disc screen 122 is provided on a branch part of a detour channel 4, and a float 101 is disposed vertically above the screen to dam a surface layer flow. Thus, a water cut-off staying water area 201 is produced in front (upstream) of the float main body and a skirt, in which dust 301 is trapped. After that, the dust 301 is surely drifted with a water flow produced by a stream generating device 107 from a branch part to the downstream in a river 1 to be removed from the front of the float 101. The dust is accumulated in a sump 202 by a collecting net 203, and suitably selected to be carried out.

3. 发明专利

JPH09217332A GARBAGE-PROOF EQUIPMENT FOR DRAINAGE SYSTEM 失效
公开(公告)号：JPH09217332A
公开(公告)日：1997-08-19
申请号：JP2374096
申请日：1996-02-09
申请人： HITACHI LTD
发明人： MATSUI SHIRO , YOSHIKAWA YOSHIHIKO
IPC分类号： E02B5/00 , E02B5/08
摘要： PROBLEM TO BE SOLVED: To provide garbage-proof equipment which can keep garbage out at low cost without lifting up the foreign matter on a screen to the ground. SOLUTION: A screen 6 is made up of a plurality of bar members that have been arranged nearly in the horizontal direction, and supports 10 (not shown) for retaining these bar members. A garbage remover 8 is provided with rakes 11 for scraping off the foreign matter attached to the screen 6, and rotary drums 12 for rotating the rakes 11 so as to drive them in the flow direction of a river 4. As the two rotary drums 12, 12 rotate, the rakes 11 move while scraping of the surface of the bar members. Thus, the foreign matter 13 attached to the bar members and the supports 10 is scraped off and carried away, so that it is separated from the rakes 11 as the rakes 11 are turned in the rotary drum 12, and it flows in the downstream of the river 4.

4. 发明专利

JPH05222760A UNDERDRAINAGE SYSTEM AND OPERATING METHOD THEREOF 失效
公开(公告)号：JPH05222760A
公开(公告)日：1993-08-31
申请号：JP2650092
申请日：1992-02-13
申请人： HITACHI LTD
发明人： MATSUI SHIRO , SHIMAUCHI SHIGEYUKI
IPC分类号： E03F1/00
摘要： PURPOSE:To prevent any flooding damage from occurring even in the case where a sudden large scale inflow into an underground tailrace from respective rivers and drainageways is predicted, by installing a movable inflow water rate control device in a conduit leading to a vertical shaft from the rivers and drainageways. CONSTITUTION:Draining taken into three inflow shafts 1, 2, 3 from a river and a drainageway is conducted to an underground tailrace 4, and drainage is made so as to be done into rivers and the sea on the surface of the earth by a pump 7 from a pump #6 installed in a part of an underground tailrace, thus an underdrainage system is constituted. In succession, a movable inflow adjusting device 8 is installed in a conduit leading to inflow shafts 1, 2, 3 from rivers and drainageways. Then an amount of inflow to the underground tailrace 4 from respective rivers and drainageways is adjusted, and the inflow to these inflow shafts 1, 2, 3 from rivers and drainageways is separately adjusted according to the water level and inflow of the rivers and the drainageways.

5. 发明专利

JPH05172079A VERTICAL SHAFT PUMP 失效
公开(公告)号：JPH05172079A
公开(公告)日：1993-07-09
申请号：JP34066591
申请日：1991-12-24
申请人： HITACHI LTD , HITACHI TSUCHIURA ENG KK
发明人： MATSUI SHIRO , ONO SHIGEYOSHI
IPC分类号： F04D13/00 , F04D15/00
摘要： PURPOSE:To maximize the storage effect of a water suction basin in a precedent awaiting operation pump which can be operated at low water levels by providing a vortex prevention device which can prevent generation of vortexes through flow control using suction air and works at below the lowest water level of the water suction basin. CONSTITUTION:An impeller 1 is located below a position corresponding to the lowest water level of a pump water suction basin below which air may be sucked from a suction bell. A plurality of an inlet ports 7 each of which is open to the inner wall surface of a pump casing 2 are provided in the portion of the pump casing 2 beneath the impeller 1. A pipe is provided which is connected at one end to each of the air inlet ports 7 and communicated with atmosphere at the other end. A vortex prevention device 11 is provided which prevents generation of vortexes particularly through flow control using intake air and works at below the lowest water level of the water suction basin. Therefore, the lowest water level up to which drainage operation of the pump is possible can be made lower than in conventional pumps and so the storage effect of the water suction basin can be increased.

6. 发明专利

JPH0533800A PUMP FEED WATER TANK DEVICE 失效
公开(公告)号：JPH0533800A
公开(公告)日：1993-02-09
申请号：JP19165591
申请日：1991-07-31
申请人： HITACHI LTD
发明人： MATSUI SHIRO , OTANI KENJI , YAMADA MASAYUKI
IPC分类号： F04D29/66
摘要： PURPOSE:To realize highly reliable lead-stand by drive in a vertical shaft pump by furnishing a pump feed water tank device which controls generation of an air-entraining vortex sucked into the pump and can drive the pump down to a lower water level in a closed type feed water tank constituting a pump feed water passage. CONSTITUTION:A step part 8 is provided on the upper face 7 of a feed water tank, and a vent pipe 9 to communicate this step part 8 and the air through to each other is provided. Additionally, the lower edge of the step part 8 is positioned at a water level peculiar to the pump which intakes an air-entraining vortex from the free surface at the lower water level or below, and an intake pipe 10 open to a level equal to or lower than the lower edge of the step part 8 and communicated through to a flow passage on the inlet side of a vertical shaft pump.

7. 发明专利

JPH03140626A CERAMIC BEARING DEVICE 失效
公开(公告)号：JPH03140626A
公开(公告)日：1991-06-14
申请号：JP27846789
申请日：1989-10-27
申请人： HITACHI LTD
发明人： MATSUI SHIRO , OTANI KENJI , YAMADA MASAYUKI , NEMOTO AKIRA
IPC分类号： F16C33/24 , F16C33/12 , F16C37/00
摘要： PURPOSE:To make the dry operation of a car for many hours possible to improve its reliability by detecting the temperature of a member near a sliding part, and supplying a refrigerant for cooling lubrication to the sliding part with the detected temperature being interlocked. CONSTITUTION:A rotary shaft 1 to which a cemented carbide sleeve 2 is fittedly fixed is slidably supported by a ceramic bearing 3 which is supported in a bearing housing 10 by a back metal 5 and an elastic body 4, and a temperature sensor 6 is provided near a sliding part. A temperature detected by the sensor 6 is inputted into a valve control device to operate a supply valve 9 according to the detected temperature for controlling the supply of a cooling-lubricating medium 8 to the sliding part. Thus the dry operation of a car can be executed for many hours, and its high reliability becomes obtainable.

8. 发明专利

JP2001289191A PUMP BEARING DEVICE 失效
公开(公告)号：JP2001289191A
公开(公告)日：2001-10-19
申请号：JP2001050752
申请日：2001-02-26
申请人： HITACHI LTD
发明人： AIZAWA KOJI , YAMAGUCHI AKIRA , NAGASAWA SHIGENOBU , MATSUI SHIRO , TAKADA KUNIO , CHIBA YOSHIAKI
IPC分类号： E03F5/22 , F04D13/00 , F04D29/04 , F04D29/046 , F04D29/047 , F16C17/14 , F16C33/24
摘要： PROBLEM TO BE SOLVED: To provide a pump bearing device capable of stably performing a repeated aerial operation for 30 minutes or longer without feeding the lubricating fluid from the outside to a bearing. SOLUTION: This ceramic bearing device comprises a ceramic bearing 4 slidably supporting a sleeve 2 fixed to a pump spindle 1, a bearing case 5 having the ceramic bearing 4 installed therein, and a bearing casing 7 elastically supporting the bearing case 5 by a rubber 6. A cylindrical container 18 is fixed to the bearing casing 7 so as to surround the lower surface and the outer peripheral side of the bearing casing 7, and a water storage tank 11 having a return plate 13 installed at the upper end part thereof is fixed to the pump spindle 1 so as to surround the cylindrical container 18. Passages 20 and 21 are provided in the cylindrical container 18, and spacers 19 are installed between the outer peripheral part of the bearing casing 7 and the inner peripheral part of the cylindrical container 18. A passage 22 is formed in the spacer 19.

9. 发明专利

JPH09228985A ENERGY SAVING PUMPING PLANT 失效
公开(公告)号：JPH09228985A
公开(公告)日：1997-09-02
申请号：JP3334796
申请日：1996-02-21
申请人： HITACHI LTD
发明人： ARAI YUSUKE , MATSUI SHIRO , NAGASAWA SHIGENOBU
IPC分类号： F04D27/00 , F04D25/02
摘要： PROBLEM TO BE SOLVED: To save energy by using a gas turbine as driving facility, providing a pump which is driven through a power transmission device of a transmission, and driving a generator through the power transmission device of the transmission to use power generated in this way as electricity for control when there is excess power. SOLUTION: When a pump 10 is driven through a transmission 7 by using a gas turbine 1 as power, a generator 8 generates power in the same way. A transmission 7 inputs power from an output shaft of the gas turbine 1 into a shaft joint 6 and an input shaft 2 of the transmission 7 and transmits power from a gear 5 to an output shaft 3 driven by the pump 10 and an output shaft 4 which drives the generator 8. When load applied on the gas turbine 1 when the operation of the pump 10 is started and stopped is large, a clutch 9 provided on the output shaft 4 is turned off to stop the transmission of power to the generator 8. On the other hand, at the time of normal operation, the clutch 9 is turned on to transmit power to the generator and generate power because load applied on the gas turbine 1 is small.

10. 发明专利

JPH06323293A RAIN WATER DRAINING PUMP SYSTEM 失效
公开(公告)号：JPH06323293A
公开(公告)日：1994-11-22
申请号：JP11271093
申请日：1993-05-14
申请人： HITACHI LTD
发明人： SHIMADA YUTAKA , MATSUI SHIRO
IPC分类号： F04D15/00
摘要： PURPOSE:To form a flow separation region behind a baffle for preventing earth and sand from accumulation in a rainwater draining pump system difficult to provide a sufficient grit chamber in the upstream of a pump installing baffles in proper portions of a pump suction sump and a water supply tank. CONSTITUTION:In a rainwater draining pump system difficult to install a sufficient grit chamber in the upstream of a pump 2, baffles 1 are installed in proper portions of a pump suction sump 4 and a water supply tank. Since the rainwater flowing from a main inflow line 3 has the flow speed abruptly slowed down when reaching the pump suction sump 4, earth and sand are liable to be accumulated. Then, the rainwater is separated by the buffle 1 to form a flow separation region behind the buffle 1 so that the earth and sand are prevented from the accumulating in the separated section. Thus, even in the rainwater draining pump system difficult to install the sufficient grit chamber in the upstream of the pump 2, the accumulated sand in the suction side of the pump 2 can be removed.

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