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1. 发明专利

PH27503A Gate pump facility and operation method therefor 未知
公开(公告)号：PH27503A
公开(公告)日：1993-08-18
申请号：PH39717
申请日：1989-12-15
申请人： HITACHI LTD
发明人： TAKADA KUNIO , YOSHIKAWA YOSHIHIKO , MATSUI SHIRO , HARADA ICHIRC , YAMADA MASAYUKI , NAGASAWA SHIGENOBU , MORIOKA SEIICHIRO
IPC分类号： E02B5/08 , E02B7/20 , E02B7/28 , F04D13/08
摘要： THE PRESENT INVENTION RELATES TO A GATE PUMP FACILITY WHICH IS USED FOR DRAINING NARROW WATERWAYS, SMALL RIVERS, OR STREAM, THE GATE PUMP FACILITY COMPRISING A PUMP FASTENED TO A GATE, AND FLAT SCREEN DISPOSED IN THE UPPER STREAM OF SAID PUMP AND SET IN THE WATERWAY OR RETRACTED TO A POSITION ABOVE THE WATERWAY IN SYNCHRONIZATION WITH THE VERTICAL MOVEMENT OF THE GATE.(FIG. 1)

2. 发明专利

JP2001263290A PUMP 失效
公开(公告)号：JP2001263290A
公开(公告)日：2001-09-26
申请号：JP2000077773
申请日：2000-03-15
申请人： HITACHI LTD
发明人： AIZAWA KOJI , NAKANO MASAAKI , AKIBA HIDEKI , NAGASAWA SHIGENOBU
IPC分类号： F04D29/046 , F04B53/00 , F04D29/04 , F16C17/14 , F16C33/10 , F16C33/20
摘要： PROBLEM TO BE SOLVED: To provide a pump capable of ensuring sufficient load resistance property with respect to a bearing, prevent both failures of a main shaft and the bearing even if uneven contact is generated, utilizing pumping liquid as lubricating water, and carrying out a stable operation for a long period, in the pump wherein the bearing is disposed in a pumping water passage and the pumping water is used as bearing lubricant. SOLUTION: In the pump wherein pumping water is used for bearing lubricant, the synthetic resin made bearing is housed in the bearing part, a foreign matter separating means opened to the pumping water passage is disposed in the vicinity of one end of the bearing part, and a cylindrical negative pressure generating mechanism having a prescribed length is disposed around the bearing casing for leading pumping water having passed the foreign matter separating means to a sliding surface of the bearing part.

3. 发明专利

JPH094586A DOUBLE SPIRAL CONCRETE CASING 失效
公开(公告)号：JPH094586A
公开(公告)日：1997-01-07
申请号：JP15285495
申请日：1995-06-20
申请人： HITACHI LTD , TAISEI CORP
发明人： YOSHIDA TAKESHI , NAGASAWA SHIGENOBU , TAKAHARA KIYOUJI , HATSUDA TOSHIO , SAITO NAOTO , TANAKA YOSHIHIRO , KANO KOICHI
IPC分类号： F04D13/00 , F04D29/42
摘要： PURPOSE: To reinforce a bonded part of a steel bulkhead to demarcate two flow passages in a double spiral casing with the concrete by arranging a reinforcing bar of the secondary concrete in the vicinity of at least either of upper or lower bulkhead support. CONSTITUTION: An outlet part of a flow passage of a double spiral concrete casing comprises an outer flow passage wall 4 bonded with the left side of a bulkhead 1 and an inner flow passage wall 5 bonded with the right side of the bulkhead 1 across the steel thick bulkhead 1. The bulkhead 1 is provided with upper and lower bulkhead supports 2, 3 extended to the right and left side from the upper and left ends, and the supports are embedded in a secondary concrete 9 to form a casing, and a lower reinforcing bar 6a which is a main reinforcement of the secondary concrete 9 is fixed to each side of the bulkhead 1 by welding. The axial load in the vertical direction applied to the bulkhead 1 is transferred to the secondary concrete 9 through the upper and lower bulkhead supports 2, 3, and the bulkhead 1 can withstand the axial load in the vertical direction.

4. 发明专利

JP2003034886A Method and system for preventing corrosion of seawater intake pump with sacrificial anode 有权
标题翻译：采用阳极阳极防止海水吸入泵腐蚀的方法和系统
公开(公告)号：JP2003034886A
公开(公告)日：2003-02-07
申请号：JP2001226463
申请日：2001-07-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YODA HIROAKI , AKI TAKASHI , KARASHI SHIGEKI , NAGASAWA SHIGENOBU , ANZAI YOSHIRO , KADOWAKI ISAMU , KIKUCHI TOMOYUKI
IPC分类号： C23F13/00
摘要： PROBLEM TO BE SOLVED: To provide a method and a system for effectively, electrolytically preventing corrosion in an aimed part, even when a sacrificial anode can not be installed in the proximity of the part to be protected from corrosion, such as a gap in an intermediate shaft coupling of the seawater intake pump. SOLUTION: This method for preventing corrosion in the aimed part to be protected from corrosion, comprises forming a closed area so as to surround the aimed part, while partitioning it with a protective plate 6, connecting the above closed space with the other space through a gap, arranging the above sacrificial anodes 7a and 7b in the proximity of the above aimed part in the above closed space, to perform a cathodic protection for the aimed part.
摘要翻译：要解决的问题：为了提供一种用于有效地电解防止目标部分中的腐蚀的方法和系统，即使牺牲阳极不能安装在待保护部分附近，例如在海水进水泵的中间轴联轴器。解决方案：用于防止目标部件中的腐蚀的方法防止腐蚀，包括形成封闭区域以围绕目标部分，同时用保护板6分隔，将上述封闭空间与另一空间连接通过间隙，将上述牺牲阳极7a和7b布置在上述封闭空间中的上述目标部分附近，以对目标部分执行阴极保护。

5. 发明专利

JPH11210683A RAIN WATER DRAINAGE PUMP 失效
公开(公告)号：JPH11210683A
公开(公告)日：1999-08-03
申请号：JP1229398
申请日：1998-01-26
申请人： HITACHI LTD
发明人： AIZAWA KOJI , OKADA RYOJI , AKIBA HIDEKI , NAGASAWA SHIGENOBU , NAKANO MASAAKI
IPC分类号： F04D29/046 , F04D29/04
摘要： PROBLEM TO BE SOLVED: To prevent the damage on a bearing sliding surface even if rain water flows into a bearing oil tank of a pump by providing a segment shaped guide bearing and an oil tank for accumulating lubricating liquid of a bearing, and using a rein material in the bearing sliding surface. SOLUTION: A segment type bearing device 3 consists of a sleeve 2 fixed to a pump spindle 1, a bearing case 4 arranged on an outer peripheral position of the sleeve 2, a guide bearing 5 using a rein material in a plurality of segment sliding surfaces arranged between the bearing case 4 and the sleeve 2 in a circumferential direction, and an oil tank 10 for accumulating lubricating liquid 7 of the guide bearing 5. In a rain water drainage pump provided with the segment type bearing device 3, stable bearing performance can be maintained without damaging the bearing sliding surface, and a drainage operation is continuously carried out at the time of overhead flooding, since a resin material 6 having a good water lubricating ability is used in the bearing sliding part, even if a drinage pumping station is flooded with water and rain water is invaded in the segment type bearing device 3.

6. 发明专利

JPH1182483A SEGMENT TYPE BEARING DEVICE AND VERTICAL SHAFT DRAINAGE PUMP 失效
公开(公告)号：JPH1182483A
公开(公告)日：1999-03-26
申请号：JP24814097
申请日：1997-09-12
申请人： HITACHI LTD
发明人： AIZAWA KOJI , OKADA RYOJI , AKIBA HIDEKI , NAGASAWA SHIGENOBU
IPC分类号： F16C17/04 , F16C17/14
摘要： PROBLEM TO BE SOLVED: To perform a stable operation for a long time even when rainwater (pumped liquid) is carried into a bearing device by using a liquid nonvolatile and having a specific gravity larger than the pumped liquid as lubricant. SOLUTION: This device has a plurality of segment-like guide bearings 5 arranged along the circumference between a bearing case 4 and a sleeve 2 and an oil tank 6 for storing its lubricant 7. As the lubricant 7, a nonvolatile liquid having a specific gravity larger than a pumped liquid (rainwater), for example, a fluorine oil (specific gravity: about 2.0) or a phosphate oil (1.2) is preferably used. Since the lubricant 7 has the specific gravity larger than that of the pumped liquid even if the pumped liquid is penetrated into the bearing device, the pumped liquid layer is formed above the lubricant 7 in the oil tank 6. Therefore, the bearing 5 is continuously operable for a long time since it is laid in the state dipped in the lubricant 7, and the lubricant 7 is not carried out of the device since it is not substituted by the pumped liquid, so that the contamination can be also prevented.

7. 发明专利

JPH08232881A VERTICAL SHAFT TYPE DRAINAGE PUMP AND SHAFT SEAL DEVICE FOR VERTICAL SHAFT TYPE DRAINAGE PUMP 失效
公开(公告)号：JPH08232881A
公开(公告)日：1996-09-10
申请号：JP3539695
申请日：1995-02-23
申请人： HITACHI LTD
发明人： CHIBA YOSHIAKI , AIZAWA KOJI , ARAI YUSUKE , NAGASAWA SHIGENOBU
IPC分类号： F04D29/12 , F04D13/00 , F16J15/34
摘要： PURPOSE: To enable aerial operation stably during a long time and repeatedly by utilizing a pumping liquid as lubricating water without injecting lubricating water from the outside of a pump as a lubricating structure for a shaft seal device. CONSTITUTION: A shaft seal device comprises a seat ring held in the outer periphery of a rotating main shaft 1, and a seal ring 8 disposed opposite to the seat ring and held on a pump casing 10. The seal ring 8 and the seat ring 7 are pressed to come into contact with each other to form the shaft seal device for preventing leakage of a fluid. Further, the main shaft 1 is provided with a rotary case 14 which surrounds both the seal ring 8 and the seat ring 7 and has an opening part from which a pumping liquid can enter on the upper part thereof.

8. 发明专利

JPH0763196A VERTICAL SHAFT PUMP PROVIDED WITH DOUBLE VOLUTE CASING 失效
公开(公告)号：JPH0763196A
公开(公告)日：1995-03-07
申请号：JP20625893
申请日：1993-08-20
申请人： HITACHI LTD
发明人： AKIBA HIDEKI , YAZAWA SETSUO , TAKADA KUNIO , NAGASAWA SHIGENOBU , YAMADA MASAYUKI
IPC分类号： F04D5/00 , F04D29/44
摘要： PURPOSE:To reduce a required installation space and to smooth water flow by forming a partition wall, which is situated between two passages in a casing and separates them from each other, of steel material. CONSTITUTION:A double volute casing is provided with two passages, in which water flows setting a shaft center of a pump as the center, and these two passages are separated from each other by a partition wall 1 spirally extending from one point on the outside of an impeller. A passage outlet part of the casing consists of an upper partition wall supporting plate 2 and a lower partition wall supporting plate 3, each of which individually extends from the upper end or the lower end of the partition wall 1 to both of right and left sides, and an outside passage wall 4 and an inside passage wall 5, both of which are formed into U-shapes, while setting the steel thick partition wall 1 as the center. The outside passage wall 4 and the inside passage wall 5 consist of steel plates which is considerably thinner than the partition wall 1. Therefore, the thickness of the partition wall 1 can be reduced in comparison with a concrete wall, and the size of the casing can be reduced by this thinned portion. On the other hand, a change in flow velocity of water in the tip part of the partition wall 1 splitting the water flow is reduced, so that a loss in a pump head can be reduced.

9. 发明专利

JPH05123756A THREE-DIMENSIONALLY CURVED SURFACE WORKING DEVICE AND WORKING METHOD 失效
公开(公告)号：JPH05123756A
公开(公告)日：1993-05-21
申请号：JP28634791
申请日：1991-10-31
申请人： HITACHI LTD
发明人： NARUSE TAKAO , NAGASAWA SHIGENOBU
IPC分类号： B21D5/01 , B21D37/02 , B21D37/16 , B21D53/78 , B63H1/26
摘要： PURPOSE:To provide the three-dimensionally curved surface working device which reduces the weight of a press forming machine and a punch and a die and can work the curved surface of steel sheets at cold with high accuracy. CONSTITUTION:A sheet to be worked is inserted between the punch 7 and the die 8 and while the sheet is held loaded with pressurizing force at the time of press forming, a heating and cooling devices 14 disposed in the punch is actuated, by which the three-dimensionally curved surface of the work 30 is formed. The periphery is fixed by a fixture 24 provided on the die, by which the front surface of the die is formed; thereafter, the sheets to be worked are successively supplied and the similar operations are repeated until a desired plate thickness is obtd., by which the three-dimensionally curved surface thick material of a lamination type is obtd.

10. 发明专利

JPH0425668A SHAFT SEALING DEVICE 失效
公开(公告)号：JPH0425668A
公开(公告)日：1992-01-29
申请号：JP12411590
申请日：1990-05-16
申请人： HITACHI LTD
发明人： NAGASAWA SHIGENOBU
IPC分类号： F04B53/00 , F16J15/18
摘要： PURPOSE:To make air admission and liquid spill checkable with a pressure differential alone be structuring a seal ring to be shiftable in the axial direction by dint of this pressure differential. CONSTITUTION:At the time of negative pressure, air gets into a B chamber from A (atmospheric side) by way of (a)-(b). Then, if a taper, serving as a small diameter toward the B chamber, is formed at the inner wall side of a gland 2, a seal ring 1 is moved by dint of a pressure differential between both these A and B chambers, thus a proper seal can be done at an X part. When the seal ring 1 is formed into a two-piece structure in order to facilitate its replacement, air enters even from a Y split surface by way of (c)-(d). Accordingly, if the split surface is decentered (plane view) while it is slanted to some extent (side view), there is a difference in attraction of the seal ring 1 to the vacuum side, preventing the air from entering. Even if a clearance between the seal ring 1 and a shaft 4 is reduced, the air enters into the B chamber from A by way of (e)-(f). Then, a seal ring part form of the shaft 4 is formed into a taper form, thereby sealing it at a Z part.

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