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31. 发明专利

JPH08240453A GAS LEAKAGE DETECTING DEVICE 失效
公开(公告)号：JPH08240453A
公开(公告)日：1996-09-17
申请号：JP6705395
申请日：1995-03-01
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , KATO HIDEO , SAKAI KATSUTO , SATOU SOUBUN , SATO SHINICHI
IPC分类号： G01F1/00 , G01M3/28 , G08B21/00 , G08B21/16
摘要： PURPOSE: To provide a gas leakage detecting device which can extremely speedily and easily detect gas leakage and can detect even abnormality such as accumulation of foreign matters in a pipe. CONSTITUTION: The gas leakage detecting device 11 detects transfer to OFF from ON of a hot water supply unit 14 being a specified gas apparatus to be a reference, and finds a pressure variation in a supply inner pipe 13 before and after its change. This pressure variation is compared with a reference differential pressure (a pressure variation at transfer time to OFF from ON of the hot water supply unit 14 when gas leakage is not caused) beforehand found by an experiment or the like, and the existence of gas leakage and its degree in the supply inner pipe 13 on the upstream side from the gas leakage detecting device 11 are judged and displayed. When a small gas leakage place 16 exists in the supply inner pipe 13, the pressure variation in the supply inner pipe 13 when the hot water supply unit 14 is put in an OFF condition from ON becomes larger than the reference differential pressure, and when the gas leakage quantity becomes further larger, its pressure variation becomes further larger.

32. 发明专利

JPH08210894A GAS METER 失效
公开(公告)号：JPH08210894A
公开(公告)日：1996-08-20
申请号：JP4230095
申请日：1995-02-07
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , KATO HIDEO , SAKAI KATSUTO , SATOU SOUBUN , SATO SHINICHI
IPC分类号： G01F3/22 , G01F1/28 , G01F1/40
摘要： PURPOSE: To reduce the size of a gas meter. CONSTITUTION: A gas sensor is provided with a main valve 21 for covering an opening 14 in the flow passage of a gas, hole 24 provided in the valve 21, cutoff valve 20 having an auxiliary valve 26 which can close the hole 24, and small differential pressure sensor which detects the differential pressure between the upstream side and downstream side of the valve 20 and calculates the flow rate of the gas based on the output of the sensor. In a small flow rate region, the flow rate measuring accuracy is improved by increasing the pressure loss by causing the main valve 21 to cover the opening 14 and the auxiliary valve 26 to open the hole 24. In a large flow rate region, insufficient supply of the gas is prevented by decreasing the pressure loss by causing the main valve 21 to open the opening 14.

33. 发明专利

JPH08159837A GAS METER 失效
公开(公告)号：JPH08159837A
公开(公告)日：1996-06-21
申请号：JP32963694
申请日：1994-12-02
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , KATO HIDEO , SAKAI KATSUTO , SATOU SOUBUN , SATO SHINICHI
IPC分类号： G01F1/00 , G01F3/22 , G01F15/06 , G02F1/13
摘要： PURPOSE: To deal with both upper mouthpiece fitting and a lower mouthpiece fitting with a simple structure. CONSTITUTION: A liquid crystal 29 is exposed to both front side and back side of a main body, and the displayed content can be seen from both front side and back side of the main body. When the gas meter is installed using a lower mouthpiece, an integrated flow rate is displayed on a liquid crystal display portion 29 in a recognizable form from the front side of the main body in correspondence to the direction of the main body by a front display drive circuit 31. When the gas meter is installed using an upper mouthpiece, the integrated flow rate is displayed on the liquid crystal display portion 29 in the recognizable form from the back side of the main body in correspondence to the direction of the main body by a back display drive circuit 32.

34. 发明专利

JPH07204580A LINING METHOD OF PIPELINE 失效
公开(公告)号：JPH07204580A
公开(公告)日：1995-08-08
申请号：JP685994
申请日：1994-01-26
申请人： TOKYO GAS CO LTD
发明人： SHIGEFUJI TAKASHI , SATOU SOUBUN
IPC分类号： B05D7/22
摘要： PURPOSE:To provide a lining method of pipelines which forms smooth lining films without remaining uncoated parts without being coated within the pipelines including step parts caused by connection of connecting members, such as sockets and elbows. CONSTITUTION:A liquid resin 6 and a small-diameter pig 7 are moved from a first aperture side to a second aperture side, by which a lining film 14 larger in thickness thicker than a set lining film 15 is formed on the inside surface of the pipeline 1 in a first stage. The set lining film 15 is formed on the inside surface of the pipeline 1 while the thick lining film 14 formed in the first stage is leveled off by moving a second pig 8 from the second aperture side to the first aperture side in a second stage. A dead angle of coating may be produced when a liquid resin 6 fails to enter the step part 2a on the rear side of the progressing direction of the step parts 2a, 2b formed by the connecting member 2 interposed in the mid-way of the pipeline during execution of the first stage. Such dead angle of coating is, however, eliminated at the time of leveling off of the resin 6 by the second stage in such a manner that the resin 6 intrudes into the step part 2a.

35. 发明专利

JPH06185973A LENGTH MEASURING COIL FOR TUBE INVERTING AND LINING DEVICE 失效
公开(公告)号：JPH06185973A
公开(公告)日：1994-07-08
申请号：JP21127492
申请日：1992-08-07
申请人： TOKYO GAS CO LTD
发明人： TOYODA SHIGERU , SHIGEFUJI TAKASHI , SATOU SOUBUN
IPC分类号： B29C63/36 , G01B7/00
摘要： PURPOSE:To eliminate the occurrence of a sensitivity difference between strain gauges at two locations. CONSTITUTION:A strain gauge holder 3 is fixed to the axial body 2 of a length measuring coil by means of fixing members 12 and 12a which respectively fix both ends of the holder 3 to the axial body 2. When the length measuring coil is bent, the whole body of the holder 3 is bent in the same curvature, since the holder 3 is fixed by both ends. Therefore, no sensitivity difference occurs between strain gauges 6 and 6a.

36. 发明专利

JPH10197300A FLOWMETER UTILIZING DIFFERENTIAL PRESSURE 失效
公开(公告)号：JPH10197300A
公开(公告)日：1998-07-31
申请号：JP522897
申请日：1997-01-16
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SATOU SOUBUN
IPC分类号： G01F1/34 , G01F1/00 , G01F1/50
摘要： PROBLEM TO BE SOLVED: To provide a flowmeter utilizing differential pressure in which even a micro flow rate can be measured accurately. SOLUTION: A dynamic pressure in a gas tube 1 is introduced into a pressure chamber 10A and a static pressure is introduced into a pressure chamber 10B. Pressure difference is detected by a polymer piezoelectric membrane 11 and the flow rate of gas is determined therefrom. When the flow rate of gas is lower than a reference level, the gas tube 1 is interrupted by means of a shut-off valve 51 and the lowering rate of pressure is detected by means of a pressure sensor 52. A decision is made that a micro flow rate is detected if the lowering rate of pressure is lower than a reference value and a zero point adjusting section 40 adjusts zero point of a pressure difference detected in a pressure difference detecting chamber 10 under a state where the gas tube 1 is interrupted by means of the shut-off valve 51. More specifically, two pressure differences where the pressures in two pressure chambers 10A, 10B are reversed are detected and a zero point is set at a point where the average value thereof is zero. Shift of zero point of pressure difference is corrected by determining the gas flow rate with reference to the average value.

37. 发明专利

JPH09133357A GAS METER WITH BATTERY VOLTAGE MONITOR 失效
公开(公告)号：JPH09133357A
公开(公告)日：1997-05-20
申请号：JP28842595
申请日：1995-11-07
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SATOU SOUBUN , SATO SHINICHI
IPC分类号： F23N5/24 , F23N1/00 , G01F3/22 , G01F15/06 , G01F15/075
摘要： PROBLEM TO BE SOLVED: To always monitor the voltage value of a battery by supplying a shut-off command signal for closing a shut-off valve in response to the check voltage drop signal from a voltage checking circuit to the valve by a controller. SOLUTION: A voltage monitor 24 for always monitoring the output voltage of a battery 21 is provided separately from a microcomputer 20, and detects the drop of the voltage of the battery 21 to a predetermined value to supply a forcible shut-off signal 06 to the driving circuit 23 of a shut-off valve 22 and to supply a monitor voltage drop signal 07 to the port of the check voltage drop signal 11 of a controller 20. The voltage checking circuit 6 for checking the voltage of the battery 21 in frequency of a predetermined time has a pseudo- impedance Z6 similar to the internal impedance of the valve 22, and measures the voltage of the battery 21 in the frequency of a predetermined time. On the other hand, since the internal impedance Z26 of the monitor 24 is set to higher than that of the valve 22, even if it is always connected to the battery 21, the dissipation of the battery 21 is small.

38. 发明专利

JPH08278170A GAS METER 失效
公开(公告)号：JPH08278170A
公开(公告)日：1996-10-22
申请号：JP10807095
申请日：1995-04-07
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , KATO HIDEO , SATOU SOUBUN , SATO SHINICHI
IPC分类号： G01F1/00 , F16K17/36 , G01F1/20 , G01F3/22 , G01M3/28
摘要： PURPOSE: To prevent any outflow of gas by judging a fact that pressure will not be recovered quickly, in a pressure recovery monitoring after the resetting of a cutoff valve. CONSTITUTION: After gas is cut off by a cutoff valve 50 in case of trouble happening, when this cutoff valve 50 is reset, a pressure recovery monitoring part 49 detects a fact of whether gas pressure is recovered to more than the specified value on the basis of an output of a pressure sensor 40 or not, while in the case where a flow rate calculated by a flow operational part 44 is not reduced to less than the preset value within the specified time, it is so judged that the gas pressure will not be recovered. When the gas pressure is so judged that it is not recovered at all as well as when a fact that the pressure is not recovered to more than the specified value is detected, a leakage judging part 47 controls a cutoff valve driving circuit 46 and the gas is cut off again. This leakage judging part 47 judges the presence of a gas leak at a time when a fact that the gas pressure is recovered is detected by the pressure recovery monitoring part 49.

39. 发明专利

JPH08261804A LEAK DETECTOR FOR GAS METER 失效
公开(公告)号：JPH08261804A
公开(公告)日：1996-10-11
申请号：JP9129595
申请日：1995-03-24
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , KATO HIDEO , SATOU SOUBUN , SATO SHINICHI
IPC分类号： G01F1/00 , G01F1/20
摘要： PURPOSE: To measure the amount of a gas leakage while allowing accurate detection of the leakage of the gas in a short time. CONSTITUTION: A reference gas flow rate memory section 47 stores a flow rate of gas in individual use of at least one of gas apparatuses frequently used among those connected to a gas meter and a flow rate of the gas in simultaneous use of a plurality of gas apparatuses used frequently and simultaneously as reference gas flow rate. A gas leakage judging section 46 judges that the leakage of the gas occurs when a flow rate calculated by a flow rate computing section 45 is within a leak criterion flow rate range as specified range of flow rate exceeding the reference gas flow rate stored in the reference gas flow rate memory section 47.

40. 发明专利

JPH08240505A APPARATUS AND METHOD FOR DETECTING ABNORMALITY OF GAS PIPE 失效
公开(公告)号：JPH08240505A
公开(公告)日：1996-09-17
申请号：JP6705495
申请日：1995-03-01
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , KATO HIDEO , SAKAI KATSUTO , SATOU SOUBUN , SATO SHINICHI
IPC分类号： G01F1/00 , G01M3/00 , G01M3/28
摘要： PURPOSE: To provide a gas pipe abnormality detection apparatus which can detect the abnormality of gas pipes quite simply and accurately. CONSTITUTION: A gas leak detection device 11 is set at a part of a supply pipe 13 connected to a hot water supplier 14 which consumes tire constant amount of gas at the using time and a gas appliance 15. The abnormality of the supply pipe 13 at the upstream side is detected by the device 11. Concretely, the changing amount of pressure inside the supply pipe 13 is measured every time the hot water supplier 14 is turned from the on-state to the off-state, and stored in a time series manner. The presence/absence of abnormalities of the gas pipe, contents (leakage of gas, piling of foreign substances, etc.), degrees (leaking degree, piling degree, etc.), causes (accident, corrosion, etc.) are detected based on a pattern of a change with time of the changing amount of pressure.

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