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1. 发明专利

JPH10336904A SYNCHRONIZER FOR BATCH PROCESSING A PLURALITY OF GENERATORS 失效
公开(公告)号：JPH10336904A
公开(公告)日：1998-12-18
申请号：JP14386097
申请日：1997-06-02
申请人： TOKYO GAS CO LTD
发明人： INOUE HIROYUKI , YAMAMOTO KENJI , KASAMA ICHIRO
IPC分类号： H02J3/40 , H02P9/04 , H02P9/14
摘要： PROBLEM TO BE SOLVED: To improve the accuracy of detection of synchronization between the voltage of the power system of commercial power supply and the voltage of synchronous generators, by finding differences in voltage value, frequency and phase between the power system and the synchronous generators. SOLUTION: A control unit 7 determines the difference in frequency between system- side voltage VSa and generator voltage VGa , the difference in voltage value between system-side voltage VSb and generator voltage VGb and the phase voltage values of the system-side voltage VSa and the generator voltage VGa . That is, if there is a request for applying synchronous generators to the power system and the difference between voltage VSb and voltage VGb disagrees with a reference value and the value for voltage VGb is high, an exciting current is reduced. If the difference in frequency between voltage VSa and voltage VGa disagrees with a reference value and the frequency of voltage VGa is high, supplied fuel is reduced. If the difference in voltage value between voltage VSb and voltage VGb , the difference in frequency between voltage VSa and voltage VGa , and the difference in phase between voltage VSa and voltage VGa , and all equal to the reference values, the control unit 7 outputs an application command to a sequencer 8.

2. 发明专利

JPH10116530A DOUBLE SEALED TERMINAL HEADER 失效
公开(公告)号：JPH10116530A
公开(公告)日：1998-05-06
申请号：JP26860496
申请日：1996-10-09
申请人： FURUKAWA ELECTRIC CO LTD , TOKYO GAS CO LTD
发明人： KASAMA ICHIRO , AZUMA MITSUO , MIURA YASUAKI , TAKAGI YOSHIYUKI , OGURA TARO , NEGISHI HIDEO , NISHIDA TOSHIHIRO
IPC分类号： F16L5/00 , H01B17/26 , H01B17/30 , H01B17/58
摘要： PROBLEM TO BE SOLVED: To provide a double sealed terminal header allowing a leak check in a short time by use of a simple inspection device. SOLUTION: Both ends of the hole of a flange 2 with a ceramic sleeve 4 internally coupled are sealed by use of the first flange-sleeve gap sealing part 5 serving a sealing purpose via a sleeve type sealing fixture 10, and the second flange-sleeve gap sealing part 6 serving a sealing purpose via an annular sealing fixture 12. In this case, helium impregnated materials 35 are placed in space 33 formed between the flange 2 and the ceramic sleeve 4, and sealed with the first and the second flange-sleeve gap sealing parts 5 and 6 at both ends, and space 34 formed between the first and the second sleeve-conductor gap sealing parts 8 and 9, and sealed at both ends, so as to preliminarily seal helium into the spaces 33 and 34.

3. 发明专利

JPH08304164A EXPLOSION-PROOF VIBRATION SENSOR 失效
公开(公告)号：JPH08304164A
公开(公告)日：1996-11-22
申请号：JP10619395
申请日：1995-04-28
申请人： TOKYO GAS CO LTD
发明人： KASAMA ICHIRO , MATSUMOTO MASAAKI , MIYAKE HARUYOSHI
IPC分类号： G01P15/00 , G01H17/00
摘要： PURPOSE: To obtain an explosion-proof vibration sensor for detecting abnormal vibration of rotating machine, plant, large scale structure, etc., quickly and delivering an alarm in which the detectable frequency band is widened while reducing the mass of vibration detecting section and explosion-proof case thereof and increasing the natural frequency. CONSTITUTION: The explosion-proof vibration sensor comprises a printed board section 3 including an amplifier, a power supply, an analytic unit, etc., housed in a large explosion-proof case 1, and a vibration sensor section 2 housed in a small explosion-proof case 5 separated from the large explosion-proof case 1. Both explosion-proof cases are coupled through a thin flexible tube 6 and the printed board section 3 is connected with the vibration sensor section 2 through a signal cable 7 passed through the flexible tube.

4. 发明专利

JPH08298705A CABLE WATERPROOF FRAME 失效
公开(公告)号：JPH08298705A
公开(公告)日：1996-11-12
申请号：JP9911895
申请日：1995-04-25
申请人： TOKYO GAS CO LTD
发明人： KASAMA ICHIRO , TAKAGI YOSHIYUKI , OGURA TARO , TSU SHIGEMITSU
IPC分类号： H02B1/20 , H02B7/08 , H02G3/22
摘要： PURPOSE: To provide an inexpensive cable waterproof frame which can be easily installed, is light, is compact and has a larger aperture rate, has a wide area for passing a waterproof cable, has an improved waterproofness, and can be easily expanded. CONSTITUTION: A cable waterproof frame 10 for preventing water from entering such underground facility as an underground transformation room via an electrical and instrumentation cable 1 from a cable trench is provided with a waterproof block 11 made of aluminum cast with a plurality of through holes for passing the electrical and instrumentation cable.

5. 发明专利

JPH08178179A INTERNAL PRESSURE EXPLOSION-PROOF TYPE INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH08178179A
公开(公告)日：1996-07-12
申请号：JP32595394
申请日：1994-12-27
申请人： TOKYO GAS CO LTD
发明人： KASAMA ICHIRO , KUJIRAI KANJI , SATO SHIGEYOSHI
IPC分类号： F02B63/06 , F01N3/02 , F01N3/06 , F01P3/12 , F01P5/04 , F02B77/13 , F02D19/02 , F16M1/00
摘要： PURPOSE: To stop operation of an internal combustion engine when abnormality is detected by a method wherein a high sensitivity gas sensor to detect the presence of fuel gas due to leakage of gas to an explosion-proof type pressure switch to detect an internal pressure in a case and at the interior of the case always inputs a detecting result to a controller. CONSTITUTION: When it is detected that gas leakage does not occur to the interior of an internal pressure explosion-proof case 3 with which an internal combustion engine is surrounded, a fan 6 for pressure is driven and an internal pressure is held at 10mmAg or more. Consecutively, the start motor of an internal combustion engine is rotated and a fuel gas cutoff valve 4a is opened to start operation of an internal combustion engine. Further, during operation of an internal combustion engine device, gas is detected by a gas detector 13 in a case 3 and a pressure is detected by an explosion-proof pressure switch 12 and the temperature of an exhaust gas outlet is detected by an exhaust gas thermometer 5b. When it is detected that abnormality occurs to even one of the operation conditions, a control current is cutoff and an internal combustion engine is forced into a stop and operation of the fan 6 for a pressure is continued for a given time.

6. 发明专利

JPH0670491A POWER SUPPLY FOR MOVABLE EXPLOSION-PROOF APPARATUS 失效
公开(公告)号：JPH0670491A
公开(公告)日：1994-03-11
申请号：JP23642292
申请日：1992-08-12
申请人： TOKYO GAS CO LTD
发明人： KASAMA ICHIRO , TANAKA TAKAAKI , ARAKAWA MASAHIRO , SHINOHARA MATSUO
IPC分类号： H02J17/00
摘要： PURPOSE:To provide a noncontact and compact power supply for a movable explosion-proof apparatus which has no fear of sparking due to electromagnetic induction to a facility therearound. CONSTITUTION:The power supply for a movable explosion-proof apparatus comprises trucks 12, 13 which can travel together with the apparatus 2 on a cable support structure for supporting a power supply cable to become primary windings of current transformers 20, 30 along a moving route 3 of the apparatus 2 to place the transformers 20, 30 in such a manner that the power supply cable is loosely passed through annular cores of the transformers 20, 30 to supply power obtained from secondary windings of the transformers 20, 30 to the apparatus 2.

7. 发明专利

JPH04331091A INTERNAL PRESSURE EXPLOSION-PROOF METHOD OF MOBILE EQUIPMENT AND MOVING PRESSURIZED ENCLOSURE 失效
公开(公告)号：JPH04331091A
公开(公告)日：1992-11-18
申请号：JP12266191
申请日：1991-04-25
申请人： TOKYO GAS CO LTD , HITACHI LTD , BABCOCK HITACHI KK
发明人： KASAMA ICHIRO , NUKUI KAZUMITSU , ARAKAWA MASAHIRO , YOSHIOKA TATSUO , YAMAMOTO TAKAYOSHI , WATANABE EIJI , NISHINA YUKINORI
IPC分类号： B25J19/00 , B25J5/00 , B25J5/02 , F17C9/02
摘要： PURPOSE:To miniaturize the whole equipment by filling up liquefied inert gas in a Dewar vessel set up in apressurized enclosure. CONSTITUTION:A Dewar vessel 5 is set up in a movable hermetically sealed enclosure 1 while a filling means of liquefied inert gas into this Dewar vessel 5 is formed and its filling port 7 is installed at the outside of this closure 1. In addition, a discharge means 15 of the inert gas inside is installed in this enclosure 1. The liquefied inert gas is filled up in this Dewar vessel 5, and pressure in the enclosure 1 is kept up higher than that of an ambient explosive atmosphere by means of the inert gas evaporated, so this gas is used as a pressurized enclosure. Since a supply source of this inert gas is moved together with a mobile equipment, there is no limit of travel distance, so that miniaturization of the whole equipment is well promotable as compared with such that is carried in a state of high pressure gas by means of a high-pressure cylinder.

8. 发明专利

JPH01203695A SUBMERGED MOTOR-TYPE PUMP 失效
公开(公告)号：JPH01203695A
公开(公告)日：1989-08-16
申请号：JP2750988
申请日：1988-02-10
申请人： TOKYO GAS CO LTD , HITACHI LTD
发明人： SETA AKIO , HARA TOSHIHIRO , KASAMA ICHIRO , OKADA AKIHISA , WATANABE TAKAHIRO
IPC分类号： F04D7/02 , F04D13/08
摘要： PURPOSE:To reduce the risk of operating fluid leaking to the outside by providing an instrumentation cable to be laid in a motor cable-taking out high pressure pipe of large bore while stored in an instrumentation cable-protecting pipe. CONSTITUTION:A small bore-instrumentation cable-protecting pipe 15 of non- pressure resisting material is provided in a large bore-motor cable-taking out high pressure pipe 10 of pressure resisting member. An instrumentation cable 13 is provided being laid in this protecting pipe 15. Thus enabling the necessity for providing an easily broken instrumentation cable-taking out pipe as in the past to be eliminated, a hazard of pump operating fluid in its leakage to the outside can be reduced. While because the instrumentation cable-taking out pipe disappears, a number of divided cold insulators, coating a head cover, is decreased, and maintainability improves.

9. 发明专利

JPH10323092A HIGH SPEED EXCITATION CUTTING EQUIPMENT FOR BRUSHLESS TYPE GENERATOR 失效
公开(公告)号：JPH10323092A
公开(公告)日：1998-12-04
申请号：JP12673197
申请日：1997-05-16
申请人： TOKYO GAS CO LTD
发明人： INOUE HIROYUKI , YAMAMOTO KENJI , KASAMA ICHIRO
IPC分类号： H02P9/14 , H02K19/26
摘要： PROBLEM TO BE SOLVED: To make it possible to perform quick response excitation control similar to a thyristor type quick excitation method at a low cost, by providing a bypass capable of switching based on the output in parallel to a rotor excitation winding, closing the bypass and decreasing the exciting current. SOLUTION: A rectifier 6 having a short-circuit bypass SW rectifies the voltage from an AC exciter 5, detects light from LED 12 and provides a current passage in parallel to a rotator excitation winding 7. The rotor excitation winding 7 applies a voltage through the rectifier 6 having a short-circuit bypass SW. Then, a control section 11 detects a short-circuit accident and controls an excitation current at a high speed during accident of a power supply system based on a voltage measured by an instrument transformer 8 and a current measured by a current transformer 10 from a generator stator 1. In this way, the quick response excitation control similar to a thyristor type quick response excitation method used only for a large type generator can be realized at a low cost.

10. 发明专利

JPH0963349A EXPLOSION-PROOF FLUORESCENT LUMINAIRE 失效
公开(公告)号：JPH0963349A
公开(公告)日：1997-03-07
申请号：JP21156495
申请日：1995-08-21
申请人： TOKYO GAS CO LTD
发明人： KASAMA ICHIRO , OGURA TARO , TSU SHIGEMITSU , SHIMURA YOSHIAKI
IPC分类号： F21V23/00 , F21V23/02 , F21V25/12
摘要： PROBLEM TO BE SOLVED: To provide an explosion-proof fluorescent luminaire which is lightweight and whose installing-replacing work is easy and which is excellent in a light distribution characteristic by housing a compact fluorescent lamp, an automatic lighting circuit, a ballast or the like in a vessel composed of a pressure case and tempered glass. SOLUTION: When a luminaire 1 is assembled, first of all, a ballast support plate 2b is fastened to an upper end surface of a tempered glass vessel 3 by an annular screw ring 2a through a sealing material 16. At this time, a ballast 5 and a socket 9 surrounded by a heat insulating material 10 are fixed to the support plate 2b, and a small and compact fluorescent lamp 4 is fitted from below. The screw ring 2a is screw-fitted to the inside of a pressure case 2 through a sealing material 17, and is fixed by a machine screw 2c. A photoswitch 7 is provided inside an upper part of the vessel 3, and the fluorescent lamp 4 is lighted and put out through an automatic lighting circuit constituting the ballast 5 by sensing the external light. Voltage is supplied by a cable 13 protected by packing 14 at an outlet of the case 2.

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