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1. 发明专利

JPH04362295A LIQUID FEEDING DEVICE 失效
公开(公告)号：JPH04362295A
公开(公告)日：1992-12-15
申请号：JP13625991
申请日：1991-06-07
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： SATO KOICHI , MORIOKA KINYA , YOSHIDA MASAO , NAKAE SHIGEKI , KAWASAKI HIROSHI , HONMA SATOSHI , ASANO KOICHI
IPC分类号： F04D13/16 , F04D15/00 , F04D29/00
摘要： PURPOSE:To provide a liquid feeding device which can be installed even in a narrow machinery room (pump room) and permits to effectively utilizing space, and freely changing the suction/discharge piping and the panel surface of a controller even if the installation position is changed. CONSTITUTION:The inside of the range surrounded by the alternate long and short dash line of a water supply device which is constituted of a water receiving tank 101, water receiving tank 102, pump 106, pressure tank 110, pressure sensor 114 suction pipe 103 water supply pipe 109, gate valve 104 for inspection, check valve 105, discharged water feeding pipe 111, controller 112, and the panel surface 113 of the controller is accommodated in a package having a nearly cubic shape. Further, installation can be changed so that the panel surface of the controller is set at the front.

2. 发明专利

JPS6274427A FILTER UNIT 失效
公开(公告)号：JPS6274427A
公开(公告)日：1987-04-06
申请号：JP21206985
申请日：1985-09-27
申请人： HITACHI LTD
发明人： KOBAYASHI KAZUO , MORIOKA KINYA , HASEGAWA KENGO
IPC分类号： F24F7/06 , B01D46/42 , F04D25/16 , F24F3/16
摘要： PURPOSE:To make it possible to mount the titled filter unit to a position having a narrow space, by connecting a diffuser formed into such a shape that the cross-sectional area gradually increases toward the air sending direction of a sirocco fan and partitioning the fan and a filter with a partition plate. CONSTITUTION:A filter unit 10 is constituted of a sirocco fan 11, a diffuser 13 connected to an air sending port 12b and internally divided by a partition plate 14 having an opening part 15 in the single side thereof and a filter 17. The take-in part 18 of the diffuser 13 is formed into such a shape that the cross-sectional area thereof gradually increases toward the air sending direction of the fan 11 and the opening part 15 of the partition plate 14 is provided in the side opposite to the mount position of the sirocco fan 11. Therefore, the miniaturization of the unit is achieved as a whole and the atmospheric pressure in the pressure part 16 of the diffuser 13 is made well-balanced and air can be uniformly sent to a clean room.

3. 发明专利

JPS56109981A SILENCER 失效
公开(公告)号：JPS56109981A
公开(公告)日：1981-08-31
申请号：JP880580
申请日：1980-01-30
申请人： HITACHI LTD
发明人： HASEGAWA KENGO , MORIOKA KINYA
IPC分类号： F01N1/00 , F01N1/22 , F16L55/02

4. 发明专利

JPS62220778A CHECK VALVE 失效
公开(公告)号：JPS62220778A
公开(公告)日：1987-09-28
申请号：JP6420686
申请日：1986-03-24
申请人： HITACHI LTD
发明人： ITO EIICHI , MORIOKA KINYA , NAKAMURA RYUICHI , KOBAYASHI KAZUO
IPC分类号： F16K15/16 , F04C7/00 , F04C19/00
摘要： PURPOSE:To enable a valve to be operated certainly even when a vast number of discharge openings are provided densely thereon by laminating a plurality of plate-type valve elements on a plurality of discharge opening rows, and then attaching them in such a manner that each piece is independent each other. CONSTITUTION:A check valve 11 is made up of laminated-plate-type valve elements, in which the inner layer of plate-type valve element 12, the intermediate layer of plate-type valve element 13 and the outer layer of plate-type valve element 14 are laminated in the direction of discharge so that they correspond to the rows of discharge opening 10. Each of these valve elements 12, 13, 14 is made of an elastic material, and formed into a fork-like shape, in which four pieces of flap, consisting of a supporting part 16 and a sealing part 17, are extended from its broad bottom part 15. In addition, the sealing part 17 of each of these valve elements 12, 13, 14 is formed into the stream-line shape. And further, each valve element is attached in such a manner as to open and close independently, and accordingly, it is possible for one valve element to open upto a preset opening certainly without being interfered with any other valve elements.

5. 发明专利

JPS61223286A FLUID RING PUMP 失效
公开(公告)号：JPS61223286A
公开(公告)日：1986-10-03
申请号：JP6055385
申请日：1985-03-27
申请人： HITACHI LTD
发明人： ITO EIICHI , MORIOKA KINYA , NAKAMURA RYUICHI , KOBAYASHI KAZUO
IPC分类号： F04C7/00 , F04C19/00 , F04C29/06
摘要： PURPOSE:To prevent the occurrence of noises by forming a discharge port of a fluid ring pump with an aggregate of fine paths to discharge fine bubbles of discharged gas into enclosed liquid. CONSTITUTION:A discharge port 5 of a fluid ring pump is formed of an aggregate of fine paths and formed on the outside with a discharge chamber 7 in which enclosed liquid is reserved. Gas compressed in a pump chamber is changed into fine bubbles as it passes through the discharge port 5 and injected into the enclosed liquid in the discharged chamber 7 to be discharged from a discharge pipe 3. As the discharged gas is discharged as fine bubbles, noises then are not produced.

6. 发明专利

JPS59210341A Method for detecting water leakage 失效
标题翻译：检测水泄漏的方法
公开(公告)号：JPS59210341A
公开(公告)日：1984-11-29
申请号：JP8421983
申请日：1983-05-16
申请人： Hitachi Ltd , Suikoushiya:Kk
发明人： MORIOKA KINYA , TERADA HIDEO
IPC分类号： G01M3/24 , G01M3/28
CPC分类号： G01M3/2815
摘要： PURPOSE:To generate a water hammer in a piping to vibrate the place where water is leaked, and to distinguish the water leakage to detect said leakage by supplying water to the piping at a fixed flow velocity by a water supplying pump, etc. and closing rapidly a valve capable of rapid closing operation. CONSTITUTION:At first, a solenoid valve 3 is kept open, and a check valve 7 as well as valves 5a-5d, 8 are kept open, and a pump 4 is operated. When a prescribed water pressure is attained while viewing said pressure by a pressure gauge 9, the valve 3 is closed quickly by the switch operation of a controlling circuit not shown in the figures, and the pump 4 is stopped a little later than that time. At this time, the water hammer occurs at pipings 1, 2a-2c, and the piping vibrates. By this vibration, a nail 13 pierced into the piping 2a is shaken, the nail's hole becomes larger and the water leakage therefrom becomes violent. If the opening and closing operations of the valve 3 are repeated in several times, the water leakage of the piping system is almost proved by the indication of the pressure decrease using the gauge 9.
摘要翻译：目的：在管道中产生水锤，使水泄漏的地方振动，并通过供水泵等以固定的流速向管道供水，区分漏水以检测泄漏，并关闭快速地能够快速关闭操作的阀。构成：首先，电磁阀3保持打开，止回阀7以及阀5a-5d，8保持打开，并且泵4被操作。当通过压力表9观察所述压力达到规定的水压时，通过图中未示出的控制电路的开关操作，阀3快速关闭，并且泵4在该时间稍晚停止。此时，水锤发生在管道1,2a-2c处，管道振动。通过这种振动，刺入管道2a的指甲13被摇动，指甲的孔变大，并且其漏水变得剧烈。如果阀3的打开和关闭操作多次重复，则通过使用量规9的压力降低的指示几乎可以证明管道系统的漏水。

7. 发明专利

JPS5670133A COUPLING 失效
公开(公告)号：JPS5670133A
公开(公告)日：1981-06-11
申请号：JP14555579
申请日：1979-11-12
申请人： HITACHI LTD
发明人： ISHIGAKI TATSUYA , MORIOKA KINYA , KISHIMOTO HARUO , HONMA KAZUO , YOSHIDA MASAO
IPC分类号： F16D3/70
摘要： PURPOSE:To remove gaps of a coupling in its rotational direction and to reduce its starting impact torque by a method wherein a rotative roller is inserted into the wall surface of a coupling bolt hole of a flexible coupling. CONSTITUTION:In a flexible coupling, bolts 2 having a rubber 5 are inserted into and fixed to each coupling bolt hole 3 of the coupling bodies 1, 1 mounted on an input shaft 7 and an output one 8 to be connected in order to connect these two shafts 7, 8. In this case, in order to absorb irregularity of alignment of these shafts 7, 8, rotative rollers 6 are provided in some of slightly larger diameter bolt holes 3 on the opposite side of the contact point bet the hole 3 and the rubber 5 in the rotating direction. Thus, the bolt 2 is fixed in the hole 3 in a rotating direction and the coupling rubber 5 is prevented from striking the bolt hole 3 in a starting shaft to reduce values of the starting impact torque.

8. 发明专利

JPS55131599A PUMP 失效
公开(公告)号：JPS55131599A
公开(公告)日：1980-10-13
申请号：JP3690979
申请日：1979-03-30
申请人： HITACHI LTD
发明人： HASEGAWA KENGO , MORIOKA KINYA , OKANO KINPEI , NOJIMA HAYASHI
IPC分类号： F04D29/046 , F04D29/04 , F04D29/10 , F04D29/12
摘要： PURPOSE:To shorten a pump in the axial direction thereof, by causing high-pressure water from a passage communication one of grooves formed in a sleeve and a pump chamber to support a rotary shaft, while lubricating with water the sleeve and a rotating portion at their boundaries and also by diposing the sleeve near an impeller. CONSTITUTION:A passage 14 is provided to communicate one of grooves 13 formed in the inner circumferential surface of a sleeve 9 with a highly-pressured part in a pump chamber 4. As the pressure near the entrance 14a of this passage 14 is high, a part of water penetrates into the groove 13 through the passage 14a. Since a boss 8 is rotating together with the rotary shaft 1, a lubricating-film is formed between said boss 8 and sleeve 9. That is to say, as the rotary shaft 1 is supported while the water film is lubricating the sleeve 9 and the rotating member, the sleeve may be disposed near the impeller 2. Because the sleeve 9 supports the rotary shaft 1 in a surface-to-surface relation, the sleeve 9 may be able to bear sufficiently the stress exerted by the impeller 2 even if it is not considerably long. Consequently, it may be shortened in the axial direction and the rotary shaft 1 may be made thinner in diameter.

9. 发明专利

JPS62191688A FLUID RING PUMP 失效
公开(公告)号：JPS62191688A
公开(公告)日：1987-08-22
申请号：JP3290086
申请日：1986-02-19
申请人： HITACHI LTD
发明人： ITO EIICHI , MORIOKA KINYA , NAKAMURA RYUICHI , KOBAYASHI KAZUO
IPC分类号： F01C21/10 , F04C19/00
摘要： PURPOSE:To prevent rust seizure simply and surely through the use of a sepa rate member made from an anti-rusting material by forming that portion of the internal surface of a casing, which mates with the peripheral part of an impeller with a micro-gap interposed, from a material different from the casing proper. CONSTITUTION:An impeller 1 with vanes aslant to the radial direction is borne eccentrically in a casing 2 in the form of short cylinder. A sealing liquid is put in this casing 2 and rotated so as to form a fluid ring W through utilization of the centrifugal force, and a capacity type pump is formed by the sealing action of this fluid ring W. In this arrangement, a separate member 10 from the casing proper 2 is provided in the micro-gap G between the peripheral part of the impeller 1 and the inner surface of the casing 2, wherein the separate member 10 is embedded in the casing so that part of the same is exposed to the inner surface of the casing 2. Thus fillets 2' are formed. Said separate member 10 is made from an anti-rusting and corrosion resistant material so as to prevent rust seizure.

10. 发明专利

JPS5532954A MOTORRDRIVEN CENTRIFUGAL PUMP 失效
公开(公告)号：JPS5532954A
公开(公告)日：1980-03-07
申请号：JP10493978
申请日：1978-08-30
申请人： HITACHI LTD
发明人： YOSHIDA MASAO , ONA YOSHINORI , WASHINO HIROSHI , MORIOKA KINYA , HASEGAWA KENGO
IPC分类号： F04D13/06 , F04D29/08
摘要： PURPOSE:To prevent the invasion of scattering water into the inside of motor as well as raise ventilating efficiency with a simplified system in which a scattering water-preventing plate is provided integrally to bearing cap and also fan guide is integrally provided in case where air is sucked through vent. CONSTITUTION:In the motor-driven-centrifugal pump 1, the centrifugal pump 1 is integrally connected with the open-type motor 8 through the cylindrical frame 10, the motor 8 portion is covered with the droplets-shielding cover 25, the vent 19 is provided from the lower part of the frame 10 to the lower part of the end lid portion 11b on the pump side of the motor cover 11, and bearing cap 26 to fix the bearing 15 at the inside end of the bearing seat 27 of the end lid portion 11b is provided. The bearing cap 26 is extended downwards and the scattering water- preventing plat 28 facing the vent 19 is integrally provided by folding the lower end of the plate 28 toward the outside so as to form the water collecting portion 28'. And, the scupper 29 formed in the central part of the water collecting portion 28' is connected to the water exhaust port 30 provided in the outside frame 11a of the motor cover 11.

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