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1. 发明专利

JPH09306305A FLUID PRESSURE DRIVING DEVICE, AND CIRCUIT BREAKER USING THIS 失效
公开(公告)号：JPH09306305A
公开(公告)日：1997-11-28
申请号：JP11610596
申请日：1996-05-10
申请人： HITACHI LTD
发明人： SADO KOICHI , DAIMON GORO , TAKEDA YASUHIDE , KAWAMOTO HIDEO , NOGAMI TADAHIKO , MAEDA HIROSHI , SADAMURA HIROYOSHI
IPC分类号： H01H33/30
摘要： PROBLEM TO BE SOLVED: To provide a highly reliable fluid pressure driving device which can prevent a malfunction by biting-in of a foreign matter. SOLUTION: A fluid pressure driving device is provided with a fluid pressure actuating mechanism such as a piston 2 and a fluid pressure cylinder 3 to open and close a contactor 1, a fluid pressure pump 6 to pressurize and supply a working fluid to actuate the fluid pressure actuating mechanism and a control means such as a closed circuit control valve 13 and an open circuit control valve 15 to control opening-closing operation of the contactor through the fluid pressure actuating mechanism by controlling the flow of the working fluid from the fluid pressure pump 6. Among the closed circuit control valve 13 or the open circuit control valve 15, at least one control valve has a fitting hole 47 in an upstream part of a valve seat 44 so as to be slidably fitted to a valve body to prevent biting-in of a foreign matter in a closing operation stroke just before blocking up the valve seat 44 when the valve body comes into contact with the valve seat 44.

2. 发明专利

JPS62113325A OIL PRESSURE CONTROLLER OF POWER CIRCUIT BREAKER 失效
公开(公告)号：JPS62113325A
公开(公告)日：1987-05-25
申请号：JP25278085
申请日：1985-11-13
申请人： HITACHI LTD
发明人： SADAMURA HIROYOSHI , MAEDA HIROSHI , FUKUOKA MASARU
IPC分类号： H01H33/34

3. 发明专利

JPS61167842A INTERNAL DIAGNOSTIC DEVICE FOR BODY 失效
公开(公告)号：JPS61167842A
公开(公告)日：1986-07-29
申请号：JP809885
申请日：1985-01-19
申请人： HITACHI LTD
发明人： SADAMURA HIROYOSHI , MAEDA HIROSHI , KON YOSHINOBU , FUKUOKA MASARU , SASAKI KOJI
IPC分类号： A61B6/03 , G01N23/04
摘要： PURPOSE:To reduce the size of a device and to facilitate portage and installation by irradiating a body to be diagnosed with radiation and picking up its image, making the picked-up radiation incident on a fluorescent plate and converting the radiation into visible light, and performing image processing through an image sensor. CONSTITUTION:The body 3 to be diagnosed in a sealed container 3 is irradiated with radiation from a radiation source 1. Then, the transmitted radiation is made incident on the fluorescent plate 4 and converted into the visible light, which is then made incident on plural image sensors 5. Signals from the sensors 5 are amplified 6 and processed 7, and image processing 9 is carried out to make a display 12. Further, a scan driving device 8 moves an image pickup device 17 to scan the body 3 to be diagnosed. Thus, the picked-up radiation is converted by the fluorescent plate into the visible light, so the depth of the image pickup device is shortened and the device is reduced in size and weight and easily carried to take a diagnosis speedily.

4. 发明专利

JP2002235703A FLUID-PRESSURE DRIVE OF BREAKER 失效
公开(公告)号：JP2002235703A
公开(公告)日：2002-08-23
申请号：JP2001035309
申请日：2001-02-13
申请人： HITACHI LTD
发明人： SETO SHINJI , NOGAMI TADAHIKO , TAKEDA YASUHIDE , EBISAWA DAISUKE , SADAMURA HIROYOSHI
IPC分类号： F15B11/08 , H01H33/34
摘要： PROBLEM TO BE SOLVED: To provide a reliable and inexpensive fluid-pressure drive of a breaker capable of preventing a pumping operation. SOLUTION: This fluid-pressure drive comprises a selector valve 13 for controlling a fluid-pressure cylinder 4 for operating contacts 1 and 2, and a pilot valve 37 for opening and a pilot valve 39 for closing, each for operating the selector valve 13. One side of an anti-pumping piston 42 is connected to the secondary side of the pilot valve 39 for closing and the other side is connected to a pilot chamber 28 of the selector valve 13 so that the pumping operation is not performed when an open instruction is given when the pilot valve 39 for closing is open.

5. 发明专利

JPH09147696A GAS-BLAST CIRCUIT-BREAKER AND FLUID-PRESSURE DRIVING DEVICE UDED THEREFOR 失效
公开(公告)号：JPH09147696A
公开(公告)日：1997-06-06
申请号：JP30093595
申请日：1995-11-20
申请人： HITACHI LTD
发明人： DAIMON GORO , TAKEDA YASUHIDE , NOGAMI TADAHIKO , KAWAMOTO HIDEO , MAEDA HIROSHI , SADO KOICHI , SADAMURA HIROYOSHI
IPC分类号： H01H33/34
摘要： PROBLEM TO BE SOLVED: To detect the imperfect closing of a valve so as to prevent the wrong operation thereafter by connecting a downstream side space of a closed circuit operating spool valve, which has a check valve, and an oil tank to each other through a throttle, and measuring the operating condition of a fluid pump. SOLUTION: In a fluid pressure driving device 1, drive and reset of an open circuit operating valve 60 and a closed circuit operating valve 30 are performed by the fluid- pressure difference between first pilot chambers 61, 31 and second pilot chambers 63, 33. Consequently, an operating unit having a large driving force and a large resetting force and high reliability can be obtained. In the closed circuit condition of a circuit-breaker, since an upstream side of a valve seal part of a main valve 20, the operating valves 30, 60, pilot valves 40, 70 of an open circuit and a closed circuit and a check valve 90 are set at a high pressure and a downstream side thereof are set at a low pressure, in the case where the closing condition is imperfect at the time of circuit closing operation, internal liquid leakage is generated, and the operating time of a fluid pressure pump is prolonged or the number of operation time is increased. Consequently, imperfect closing can be detected by monitoring the operation time and the number of operation time.

6. 发明专利

JPH0992096A FLUID PRESSURE DRIVER OF BREAKER AND BREAKER USING THIS 失效
公开(公告)号：JPH0992096A
公开(公告)日：1997-04-04
申请号：JP24124795
申请日：1995-09-20
申请人： HITACHI LTD
发明人： NOGAMI TADAHIKO , DAIMON GORO , TAKEDA YASUHIDE , KAWAMOTO HIDEO , SADO KOICHI , MAEDA HIROSHI , SADAMURA HIROYOSHI
IPC分类号： F15B20/00 , H01H3/24 , H01H33/30 , H01H33/34
摘要： PROBLEM TO BE SOLVED: To eliminate occurrence of a malfunction accident such as that the circuit is closed of its own accord after break operation even if abnormality occurs such as that the close operation system remains as it is in close operation state even after finishing the close operation. SOLUTION: A control valve 5 for open circuit is constituted such that it opens with its pilot chamber at low pressure, while a lock valve 41, which opens when both two pilot valves connecting with a pilot valve for close and a pilot valve 16b for break come to low pressure, is provided on the passage connecting this pilot chamber with a return port. Hereby, if the above abnormality occurs, it continues to keep the close condition until the break command is issued, and once it breaks, the lock valve 41 opens, and it connects the pilot chamber of the control valve 15 for break to the low pressure side, and keeps the control value for break open thereby making this impossible of close operation, thus the malfunction accident is prevented.

7. 发明专利

JPS61172037A APPARATUS FOR INTERNAL DIAGNOSIS OF OBJECT 失效
公开(公告)号：JPS61172037A
公开(公告)日：1986-08-02
申请号：JP1244585
申请日：1985-01-28
申请人： HITACHI LTD
发明人： SADAMURA HIROYOSHI , MAEDA HIROSHI , FUKUOKA MASARU , OKUMURA KIYOSHI , NAKANO SEIZO
IPC分类号： A61B6/00 , G01N23/04
摘要： PURPOSE:To miniaturize the title apparatus to enable the use thereof even in a small area, by a method wherein object to be diagnosed is irradiated with radioactive rays and the transmitted radioactive rays are converted into visible light by a fluorescent plate to pick up the image of said visible light by an image pick-up apparatus while said apparatus is moved to the longitudinal direction of the matter to perform scanning. CONSTITUTION:X-rays are allowed to irradiate the matters 3, 4 to be diagnosed in a hermetically closed container 2 from an X-ray generation apparatus 1 and transmitted X-rays are converted into visible light by a fluorescent plate 5 to be received by image sensors 6 arranged in a line. The signals from said sensors 6 are inputted to an operation apparatus 8 through an amplifier 7 and subsequently subjected to image processing by an image processor 10 to be displayed on a display device 13. At this time, the image pick-up apparatus 18, wherein the fluorescent plate 5 and the sensor 6 are integrated, is driven to the longitudinal direction of the objects 3, 4 to be diagnosed by a driver 9 through a control system 11 in synchronous relation to the time required in image processing by the image processor 10 to perform scanning. Because transmitted X-rays are converted into visible light by the fluorescent plate to perform image processing and the image pick-up apparatus is allowed to scan to the longitudinal direction, the apparatus can be miniaturized by shortening the depth thereof and is made usable even in a small area to make it possible to enlarge an image pick-up range.

8. 发明专利

JPS60155001A DASHPOT STRUCTURE FOR GAS SHUT-OFF VALVE 失效
公开(公告)号：JPS60155001A
公开(公告)日：1985-08-14
申请号：JP1012884
申请日：1984-01-25
申请人： HITACHI LTD
发明人： SADAMURA HIROYOSHI , MAEDA HIROSHI
IPC分类号： H01H33/32 , F15B15/14 , H01H3/60 , H01H33/30
摘要： PURPOSE:To relax stress generated in a cylinder member in a dashpot for a gas shut-off valve, by allowing fluid to enter into and discharge from the dashpot through a clearance between the inner surface of the cylinder and the fitting part of a piston. CONSTITUTION:The flow of fluid for controlling the operation of a shut-off unit having a movable contat which is connected through link to a piston 1, is carried out through a clearance between the inner surface of a cylinder and the fitting part of a piston 1. Further, in the case of a cylinder in which no suction and discharge fluid holes are formed, there is no stress concentration generated by high pressure fluid in the cylinder, other than nominal stress which is inversely proportional to the wall-thickness of the cylinder so that it is possible to aim at reducing stress generated in the cylinder. With this arrangement, stress generated in the cylinder member may be reduced, thereby apparatus having a high-degree of reliability may be provided.

9. 发明专利

JPS59201616A Gas insulated electric device 失效
公开(公告)号：JPS59201616A
公开(公告)日：1984-11-15
申请号：JP7281083
申请日：1983-04-27
申请人： Hitachi Ltd
发明人： SADAMURA HIROYOSHI , MAEDA HIROSHI
IPC分类号： H02B13/055 , B01D46/42 , H01H33/64 , H02B13/02

10. 发明专利

JPH11283470A FLUIDIC DRIVE APPARATUS FOR CIRCUIT BREAKER 失效
公开(公告)号：JPH11283470A
公开(公告)日：1999-10-15
申请号：JP8658998
申请日：1998-03-31
申请人： HITACHI LTD
发明人： IWAASA SHUZO , SADAMURA HIROYOSHI , KAWAMOTO HIDEO , TAKEDA YASUHIDE , KIDOI TAKASHI , NOGAMI TADAHIKO
IPC分类号： H01H3/24 , H01H33/30
摘要： PROBLEM TO BE SOLVED: To provide a fluidic drive apparatus for circuit breakers capable of surely preventing a close operation by a wrong operation in an open-circuit condition of the circuit breaker set without affecting a normal close operation. SOLUTION: A lock valve 41 is provided that operates on condition that an upstream pressure 20 when a pilot valve 14 for opening the valve in response to a circuit closing instruction is closed, is higher than the pressure of a fluid remaining in a pilot valve 12 of a main control valve. By this configuration, a pressure increase in a channel 44 connected to a return port 30 of a control valve 13 for closing a circuit of a circuit breaker is suppressed to make a circuit close operation of the main control 8 valve ineffective. Therefore, a fear of closing the circuit breaker in an open-circuit condition except by normal close instruction is eliminated to surely prevent an erroneous circuit close operation.

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