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1. 发明专利

JPH10197391A GAS LEAK DETECTOR AND GAS LEAK DETECTING METHOD USED THEREFOR 失效
公开(公告)号：JPH10197391A
公开(公告)日：1998-07-31
申请号：JP35148896
申请日：1996-12-27
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK , YAZAKI CORP
发明人： SUYAMA KIICHI , IKADA TAKAOMI , OKAMURA SHIGENORI , YASUI MASAJI , SUZUKI TOSHIHIKO , KATO RIKIO
IPC分类号： G01M3/00 , G01M3/28
摘要： PROBLEM TO BE SOLVED: To specify the extent of a gas leak in real time by providing a duct pressure detecting means, a flow sensor, and a flow rate measuring means and finding the correlation between the flow rate and differential pressure of a gas flowing between pressure sensors when no gas leak occurs and the correlation between flow rate information and differential pressure information. SOLUTION: In an airtightness inspection process, the collection of either flow rate information 16a or differential pressure information ΔP1,..., ΔPn is urged and, at the same time, leakage tests are conducted on a duct 32 by using the collected information. In a correlation defining process, the correlation between the flow rate and differential pressure of a gas flowing through a prescribed section when no gas leak occurs and the correlation between the information 16a and information,ΔP1,..., ΔPn are found. In a duct pressure detecting process, pressure signals P1,..., Pn are generated by detecting the pressure of the gas in a plurality of sections in the duct 32. Namely, the occurrence of a gas leak is discriminated by comparing the correlation between the flow rate and differential pressure of the gas flowing between a built-in pressure sensor 13 and a first pressure sensor 121 when no gas leak occurs and the correlation between the information 16a and information, ΔP1.

2. 发明专利

JPH0953964A CHANNEL STRUCTURE FOR FLOWMETER 失效
公开(公告)号：JPH0953964A
公开(公告)日：1997-02-25
申请号：JP22855595
申请日：1995-08-14
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK , AICHI TOKEI DENKI KK , KIMMON MFG CO LTD , TAKENAKA SEISAKUSHO CO LTD , KANSAI GASMETER KK , TOYO GASMETER CO
发明人： NUKUI KAZUMITSU , KATO HIDEO , SAKAI KATSUTO , SATOU SOUBUN , SATO SHINICHI , OKAMURA SHIGENORI , OKADA SHUICHI , SATO TAKAHITO , HIRAI KANJI , YAMADA KAZUHIRO , OIKE HIDEYUKI , NAMIMOTO MASANOBU , IMAZAKI MASASHIGE , MIZUKOSHI YASUSHI
IPC分类号： G01F1/20 , G01F1/00 , G01F7/00
摘要： PROBLEM TO BE SOLVED: To provide a channel structure of flowmeter in which the accuracy of measurement can be enhanced by straightening the flow of fluid in the vicinity of a low flow rate measuring means. SOLUTION: A fluidic element 20 for measuring a high flow rate is disposed in a channel 15 while a current velocity sensor 33 for measuring a low flow rate is disposed in a channel 31. A pressure fluctuation absorber 40 is disposed in a channel 31 located on the upstream side from the current velocity sensor 33 and a straightening net 34 is disposed in the channel 31 between the outlet part 412 of pressure fluctuation absorber 40 and the current velocity sensor 33. The straightening net 34 is formed out of two net members 34a arranged at an appropriate interval from the upstream side toward the downstream side while covering the cross section of the channel 31. The gas flow discharged from the outlet part 412 of pressure fluctuation absorber 40 is straightened by the straightening net 34 before reaching the current velocity sensor 33.

3. 发明专利

JPH08338751A GAS METER 失效
公开(公告)号：JPH08338751A
公开(公告)日：1996-12-24
申请号：JP14785695
申请日：1995-06-14
申请人： OSAKA GAS CO LTD , TOKYO GAS CO LTD , TOHO GAS KK , AICHI TOKEI DENKI KK , KANSAI GASMETER KK , KIMMON MFG CO LTD , TAKENAKA SEISAKUSHO CO LTD , TOYO GASMETER CO
发明人： OKADA SHUICHI , OKAMURA SHIGENORI , SAKAI KATSUTO , NUKUI KAZUMITSU , KIMURA YUKIO , ITO TOSHIHIKO , NAMIMOTO MASANOBU , AOKI TOSHIAKI , IMAZAKI MASASHIGE , MATSUSHITA MASAHIKO , MIZUKOSHI YASUSHI
IPC分类号： G01F3/22 , G02F1/13
摘要： PURPOSE: To obtain a gas meter whose replacement operation is performed easily by making a common gas meter possible to be installed without changing the mode of a gas pipe even in the mode of a gas pipe in which the gas meter is used as a suspension type and in the mode of a gas pipe in which the gas meter is used as an upper installation type. CONSTITUTION: A display 4 which is used to display the numeral of a gas usage amount is installed so as to be connected, in a front and rear exposed state, at the upper end part or the lower end part of a main body part 1 in which an entrance connecting pipe 11 and an exit connecting pipe 12 are installed side by side, it is installed so as to be connected to be inversible to the front and the rear as well as to the right and the left, and a signal conversion means by which a signal from a metering means used to meter a passage gas amount in the main body part 1 is converted into a display signal for display so as to be sent out is installed. The signal conversion means is composed of a first signal conversion means which sends out an erect display signal in order to display a numeral on a display in an erect state and of a second signal conversion means which sends out an inverted display signal in order to display a display as a whole by inverting the top and the bottom as well as the right and the left. A changeover means which applies a display signal from the first or second signal conversion means alternatively to the side of the display is installed.

4. 发明专利

JPH08271313A GAS FLOW METER 失效
公开(公告)号：JPH08271313A
公开(公告)日：1996-10-18
申请号：JP10040695
申请日：1995-03-30
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK , AICHI TOKEI DENKI KK , TOYO GASMETER CO
发明人： KIMURA YUKIO , SATO TAKAHITO , NUKUI KAZUMITSU , OKAMURA SHIGENORI , NAGANUMA MASAHITO , HORI FUJIO
IPC分类号： G01F1/20 , G01F1/68 , G01F1/696 , G01F7/00 , G01F15/04
摘要： PURPOSE: To take correct gas flow measurement by measuring a flow by a hot-wire flow meter in the case where pressure fluctuation is caued in a fluid even if a flow is in a large-flow region of more than a specified value. CONSTITUTION: A fluid F which flows in a flow meter main body 19 is divided into a fluid which flows into a flow meter part 37 and a fluid which flows into a flow sensor inlet 38 by a partition plate 29. In the case of a fluid which flows into the flow meter part 37, pressure vibration generated in a fluid is measured from a differential pressure generated on both sides of an outlet of a measuring nozzle 11, the frequency measurement of pressure vibration is taken, and a flow is computed from the obtained frequency. In the case of a small flow of 3-170 litre/h, the flow is measured by an IC flow sensor mounted on a flow sensor inlet 38. On the other hand, a fluctuation determining means determines whether there is fluctuation in the measured flow or not. If yes, even if the flow is more than a specified value, a flow is measured by the IC flow sensor.

5. 发明专利

JPH08247399A PRESSURE FLUCTUATION ABSORBING DEVICE 失效
公开(公告)号：JPH08247399A
公开(公告)日：1996-09-27
申请号：JP7727795
申请日：1995-03-08
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK , AICHI TOKEI DENKI KK , KIMMON MFG CO LTD , TAKENAKA SEISAKUSHO CO LTD , KANSAI GASMETER KK , TOYO GASMETER CO
发明人： NUKUI KAZUMITSU , KATO HIDEO , SAKAI KATSUTO , SATOU SOUFUMI , SATO SHINICHI , OKAMURA SHIGENORI , SATO TAKAHITO , SANNOMIYA SHIZUO , AOKI TOSHIAKI , IMAZAKI MASASHIGE , NOTO MASAHIRO , SHIBUYA TADAO , MIZUKOSHI YASUSHI
IPC分类号： F15D1/02 , F16L55/04 , F17D1/04
摘要： PURPOSE: To provide a pressure fluctuation absorbing device which can effectively absorb pressure fluctuation with pressure loss restrained low by a simple structure. CONSTITUTION: This pressure fluctuation absorbing device has a partition 24 for partitioning a main body 21 into air-chambers 22, 23; an introduction port 25; a discharge port 26; a cylindrical body 27 which is fixed to the upper face of the partition 24 at its lower end; and a float 28 arranged inside the cylindrical body 27. A gas introducing opening 29 is provided on the bottom of the cylindrical body 27, and the upper side of the cylindrical body 27 is closed by an upper wall 30. A sliding member 42 slides in a throttle opening 31 functioning as a variable throttle on the side wall of the cylindrical body 27 to prevent the clogging of the throttle opening 31. The small hole 32 of the upper wall 30 makes the air-chamber 33 function as a cushioning mechanism for controlling the abrupt movement of the float 28 to prevent hunting. The sliding member 41 slides in the small hole 32 with the vertical movement of the float 28 to prevent the clogging of the small hole 32.

6. 发明专利

JPH08136298A FLUIDIC TYPE GAS METER 失效
公开(公告)号：JPH08136298A
公开(公告)日：1996-05-31
申请号：JP27092794
申请日：1994-11-04
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK , AICHI TOKEI DENKI KK
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , SATO SHINICHI , OKAMURA SHIGENORI , SATO TAKAHITO , NAGANUMA MASAHITO , HORI ITSURO
IPC分类号： G01F1/20 , G01F1/68 , G01F7/00
摘要： PURPOSE: To eliminate the excess integration when the actual flow rate is zero. CONSTITUTION: Even if the actual flow rate is zero, the output pulse of a flow sensor 12 is generated by the influence of disturbance such as a gas pressure change, etc. Since the output characteristics of the sensor 12 is substantially equivalent for the flow rates of positive and negative directions like (b), the output pulse due to the change becomes substantially the same in both the positive and the negative. The positive and the negative output pulses are multiplied by a pulse constant by a volume converter 19, and converted into the volume. Further it is cancelled by an adder-subtracter buffer in a cancel calculator 20 to become zero. Thus, the excess integration is prevented.

7. 发明专利

JPH0814961A GAS METER 失效
公开(公告)号：JPH0814961A
公开(公告)日：1996-01-19
申请号：JP16629094
申请日：1994-06-24
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK , AICHI TOKEI DENKI KK
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , SATO SHINICHI , OKAMURA SHIGENORI , KIMURA YUKIO , NAGANUMA MASAHITO , HORI ITSURO
IPC分类号： G01F1/00 , G01F1/20 , G01F1/72 , G01F3/22 , G01F15/04 , G01F15/075
摘要： PURPOSE:To obtain a gas meter which can prevent an erroneous measuring operation due to the influence of a disturbance such as a pressure change or the like. CONSTITUTION:A flow-rate arithmetic part 21, to which outputs of a fluidic element 11 and a flow sensor 12 are input, operates a flow rate. A filter part 22 acquires, at a prescribed cycle, a measured flow rate which has been operated by the flow-rate arithmetic part 21, it performs an arithmetic operation in which a previously operated result and the measured flow rate which has been acquired this time are added in a prescribed ratio, and it executes a smoothing and processing operation to the measured flow rate. When a value which has integrated a value which has been smoothed and processed by the filter part 22 exceeds a prescribed value, a buffer part 23 outputs the value which has been smoothed and processed. An integration part 24 integrates the value which is output from the buffer part 23, and it displays the value on a display device 13.

8. 发明专利

JPH06123645A FLUIDIC GAS SHUTTING APPARATUS 失效
公开(公告)号：JPH06123645A
公开(公告)日：1994-05-06
申请号：JP27126492
申请日：1992-10-09
申请人： MATSUSHITA ELECTRIC IND CO LTD , TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK
发明人： UEKI KOICHI , TAKEMURA KOICHI , UEKI TAKASHI , SAKAI KATSUTO , OKAMURA SHIGENORI , SATO YASUO , KIMURA YUKIO
IPC分类号： G01F1/20
摘要： PURPOSE:To measure the flow rate of a fluid with a single sensor without being influenced by the temperature of the fluid, by automatically adjusting the width of a jetting nozzle of a fluidic oscillator element to be an optimum value in accordance with the oscillating frequency. CONSTITUTION:The width of a jet flow of a fluidic oscillator element 2 is set at a default value beforehand. When a gas is started to be used, the element 25 oscillates the fluid by the Coanda effect. The oscillating frequency of the fluid is detected at 26. A width controlling means 27 detects whether the oscillating frequency is not smaller than a predetermined value. If the frequency is not smaller than a predetermined value, a width variable means 28 is urged, so that the width of a jetting nozzle of the element 25 is automatically varied. At the same time, the position of the variable means 28 is detected at 27b. When the position becomes a set value, the variable means 28 is stopped to be moved and held at the position. The flow rate is obtained at 29 from the detected oscillating frequency at 26, and an integrated value of the flow rate of the used gas is obtained by an integrated flow rate operating means 30. A judging means 31 judges the using state of the gas from the flow rate and the integrated flow rate. If the using state is abnormal, the judging means 31 activates a shutting means 33, thereby, to stop the supply of gas.

9. 发明专利

JPH09257623A METHOD AND APPARATUS FOR INSPECTING LEAKAGE OF GAS PIPING 失效
公开(公告)号：JPH09257623A
公开(公告)日：1997-10-03
申请号：JP7256796
申请日：1996-03-27
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK , YAZAKI CORP
发明人： SUYAMA KIICHI , IKADA TAKAOMI , OKAMURA SHIGENORI , ANDO JUNICHI , SUZUKI TOSHIHIKO
IPC分类号： G01F1/00 , G01F3/22 , G01M3/00 , G01M3/28 , G08B21/00 , G08B21/16
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for inspecting the leakage of a gas piping, by which information required for the judgment of the leakage even at the using time of gas, and the possibility of the shortening of judging time is provided. SOLUTION: The flow rate of the gas, which is supplied through a gas bypass line 11a, is measured by a flow-rate detecting means 15 based on the premise that there is no leakage in a gas piping 11, and monitoring is performed for a specified period. A leakage-inference-value setting means 27a-2 sets the minimum flow rate, the second minimum flow rate and the minimum-change-width flow rate during the specified period as the inference values of the leakage. Thereafter, a leakage judging means 27a-4 judges the presence or absence of the doubt of the leakage based on the measured minimum flow rates, which are measured by a leakage-inference-value measuring means 28a-3 at every specified inspecting time, and the preset inference value of leakage. When the judgment of the presence of the leakage doubt have continued by the specified number of times, a leakage detecting means 27a-5 detects the presence of the minute leakage. An airtight-leakage inspecting means 27a-6 performs the airtight leakage inspection of the gas piping.

10. 发明专利

JPH0915006A GAS FLOW METER 失效
公开(公告)号：JPH0915006A
公开(公告)日：1997-01-17
申请号：JP18334395
申请日：1995-06-26
申请人： TOHO GAS KK , TOKYO GAS CO LTD , OSAKA GAS CO LTD , YAMATAKE HONEYWELL CO LTD , TOYO GASMETER CO , AICHI TOKEI DENKI KK , KANSAI GASMETER KK , KIMMON MFG CO LTD , TAKENAKA SEISAKUSHO CO LTD
发明人： KIMURA YUKIO , SATO TAKAHITO , NUKUI KAZUMITSU , OKAMURA SHIGENORI , OISHI YASUHARU , HORI FUJIO , ITO TOSHIHIKO , NAMIMOTO MASANOBU , AOKI TOSHIAKI , IMAZAKI MASASHIGE , MATSUSHITA MASAHIKO
IPC分类号： G01F1/00 , G01F1/68 , G01F1/72 , G01F3/22 , G06F17/18
摘要： PURPOSE: To provide a gas flow meter of which measurement is not affected by the occurrence of pulsation of the flow of gas. CONSTITUTION: The gas flow meter comprises a flow sensor 28 that is attached to a gas pipeline and measures flow rate of a gas, a sampling program 25 that reads measurement values from the flow sensor 28 every specified first sampling time and converts them into digital values and a gas consumption amount calculation program 27 that calculates the consumption amount during a predetermined time period from the digital values read by the sampling program 25. It further comprises an average calculation program 26 that reads measurement values of the flow sensor 28 every second prescribed time in a prescribed measuring time at the first sampling time and converts them into digital values to calculate the average thereof.

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