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91. 发明专利

JPH08226559A METER COCK 失效
公开(公告)号：JPH08226559A
公开(公告)日：1996-09-03
申请号：JP5672395
申请日：1995-02-21
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SATO SHINICHI , SAITO MORIO
IPC分类号： F16K5/06 , F16K17/34
摘要： PURPOSE: To automatically and speedily cut out flowing of gas at the time when an abnormally large flow rate of gas flows. CONSTITUTION: Gas flows between the inside of a gas pipe 10a and the outside of a guide member 22, passes a slit 25 and flows in a gas pipe 10 on the downstream side of a meter cock through a passage 13. In this state, when an abnormally large flow larger than specified quantity, for example, 15m /h, flows velocity of gas passing the slit 25 becomes higher, suction force is generated between the passage 13 and a fuse ball 21 by flow of gas, the fuse ball 21 is sucked up by this suction force, the fuse ball 21 is adhered closely to an inlet part of the passage 13, and consequently, the passage 13 is closed and flowing of gas is cut out.

92. 发明专利

JPH08219928A METHOD FOR DETECTING POINT VOLUME OF GAS LEAKED FROM GAS DUCT 失效
公开(公告)号：JPH08219928A
公开(公告)日：1996-08-30
申请号：JP2977095
申请日：1995-02-17
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , KATO HIDEO , SATOU SOUFUMI , SATO SHINICHI
IPC分类号： G01M3/00 , G01M3/28
摘要： PURPOSE: To obtain a method for detecting the gas leak point and the volume. of leaked gas in a gas duct, e.g. the service pipe of city gas. CONSTITUTION: In the method for detecting leakage of gas from a duct 2 coupling between a main or branch pipe 1 and a gas meter 3, the gas meter 3 is provided with a pressure sensor 5. At some moment of time, pressure difference is measured by means of the gas meter 3 between a case where no gas flows through the duct 2 and three cases where gas flows through the duct at different flow rate. Assuming the pressure losses and the volumes of leaked gas at the duct part between the main or branch pipe 1 and a leak point L and at the duct part between the leak point L and the gas meter 3 at some flow rate are unknowns, simultaneous equations of three elements comprising equations of the differential pressures for three flow rates and the measured differential pressures are solved thus determining the gas leak point and the volume of leaked gas. Since the gas leak point and the volume of leaked gas can be detected for the duct between the gas meter 3 and the main or branch pipe 1 without digging the ground surface, manpower can be reduced.

93. 发明专利

JPH08219839A OUTPUT CORRECTING DEVICE OF FLOW VELOCITY SENSOR AND FLOW METER 失效
公开(公告)号：JPH08219839A
公开(公告)日：1996-08-30
申请号：JP4919295
申请日：1995-02-14
申请人： TOKYO GAS CO LTD , YAMATAKE HONEYWELL CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , SATO SHINICHI , OISHI YASUHARU
IPC分类号： G01P5/12 , G01F1/00 , G01F1/68 , G01F1/696 , G01F15/04 , G01F25/00
摘要： PURPOSE: To reduce influence of fluctuation of a flow velocity due to pressure fluctuation or the like without causing any error in the computed flow. CONSTITUTION: An average value computing part 51 measures flow sensor output which is the output of an A/D converter 41 for A/D converting an output signal of a flow sensor 30, and computes the average value of flow sensor output to be outputted to a correcting part 53. A dispersion decision part 52 measures the flow sensor output which is the output of the A/D converter 41 for a fixed time, obtains a difference between the maximum value and the minimum value of the flow sensor output as dispersion of the flow sensor output, and determines a correction value according to the dispersion. The correcting part 53 multiplies the average value obtained by the average value computing part 51 by a correction value determined by the dispersion decision part 52 and outputs the same to a flow computing part 54. The flow computing part 54 computes a flow and an integrating flow according to the output of the correcting part 53.

94. 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.

95. 发明专利

JPH08159861A FLUID VIBRATION DETECTOR SENSOR AND FLUIDIC FLOW METER USING IT 失效
公开(公告)号：JPH08159861A
公开(公告)日：1996-06-21
申请号：JP33174194
申请日：1994-12-09
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SATO SHINICHI
IPC分类号： G01F1/20 , G01H11/02
摘要： PURPOSE: To prevent erroneous detection of fluid vibration due to corrosion of electrodes by eliminating metal electrodes from a part (a vibration film) which is most deformed by fluid vibration. CONSTITUTION: A piezoelectric element 40A and a piezoelectric element 40B are installed and fixed in a pressure chamber 33A of a pressure fluctuation detecting part 33 and in a pressure chamber 33B of a the pressure fluctuation detecting part 33, respectively, near vibration films 35. Each vibration film 35 vibrates due to pressure difference fluctuation between the pressure chambers 33A, 33B and pressure difference fluctuation between the pressure chambers 34A, 34B. Corresponding to the vibration of the vibration film 35, the center part 35b of the vibration film 35 comes into collision against respective piezoelectric elements 40A, 40B and applies pressure. The pressure is converted into an electric signal corresponding to the fluid vibration by the piezoelectric elements 40A, 40B and outputted.

96. 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.

97. 发明专利

JPH08159828A FLUID VIBRATION DETECTION SENSOR AND FLUIDIC FLOW METER USING IT 失效
公开(公告)号：JPH08159828A
公开(公告)日：1996-06-21
申请号：JP32963594
申请日：1994-12-02
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SATO SHINICHI
IPC分类号： G01F1/20
摘要： PURPOSE: To provide a fluid vibration detection sensor which can detect fluid vibration without utilizing the piezoelectric characteristic of a polymer piezoelectric film, and can prevent the corrosion of a vibration film. CONSTITUTION: The fluid vibration detection sensor is provided with a fluid vibration detection means 40A, 40B composed of an electromagnetic coil 4 and a magnet 42. The electromagnetic coil 41 is arranged in the center portion 35b of a vibration film 35. The magnet 42 is fixedly arranged on the internal vessel 32 side so that its one part is inserted into the electromagnetic coil 41. When the vibration film 35 vibrates based on a differential pressure, the magnet 42 relatively reciprocates in the electromagnetic coil 41. As the result, induction current is generated in the electromagnetic coil 41 by electromagnetic induction. Fluid vibration flowing in a passage can be detected based on this current.

98. 发明专利

JPH08152348A FIRE SAFETY DEVICE OF GAS METER FOR NEIGHBORING HOUSE 失效
公开(公告)号：JPH08152348A
公开(公告)日：1996-06-11
申请号：JP29483294
申请日：1994-11-29
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , SATO SHINICHI
IPC分类号： G01F3/22 , F16K17/38
摘要： PURPOSE: To prevent secondary accident by providing a temperature sensor for sensing the ambient temperature of a gas meter and a safety circuit for closing an isolation valve built in the gas meter when the temperature sensed by the temperature sensor reaches a set level thereby interrupting gas supply. CONSTITUTION: When the temperature on the outside or inside of a gas meter body 1 detected through a temperature sensor 5 reaches 100 deg.C, for example, a safety circuit 6 delivers a signal to an isolation valve 4 thus interrupting gas supply. Output signal from the temperature sensor 5 is converted, at a voltage/temperature converting section 7, into a voltage and a temperature deciding section 8 makes a decision whether a set temperature is exceeded based on the magnitude of the voltage. If the set value is exceeded, a driving (closing) signal is delivered to the isolation valve 4. Since no gas flow out even if a rubber tube is burnt, for example, in the downstream of the gas meter upon occurrence of a tire, secondary accident can be prevented.

99. 发明专利

JPH08136302A FLOWMETER 失效
公开(公告)号：JPH08136302A
公开(公告)日：1996-05-31
申请号：JP29888894
申请日：1994-11-08
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , KATO HIDEO , SAKAI KATSUTO , SATOU SOUFUMI , SATO SHINICHI
IPC分类号： G01F1/00 , G01F1/20
摘要： PURPOSE: To measure a small flow-rate region with less amount of power consumption and without being affected by dust and moisture excessively by providing a fluidic oscillation detection sensor, a connecting hole, a differential pressure sensor, and a flow-rate operation means. CONSTITUTION: Connecting holes 41 and 42 are provided at the upstream/ downstream sides of a nozzle 21 and at the same time a throttle part 43 is provided near the entrance of the nozzle 21. The differential pressure between the connecting holes 41 and 42 is detected by a second piezoelectric film sensor. Then, the flow-rate at a small flow-rate region is calculated by a second flow- rate operation part based on the output of the sensor and the throttle part 43, thus measuring the flow rate at a small flow-rate region with a flowmeter using a fluidic flowmeter. The second piezoelectric film sensor consumes extremely less power as compared with a flow sensor and is not directly exposed in the flow of gas and hence is in a structure for achieving a stable operation without excessively affected by dust and water, thus improving reliability and durability without excessively affected by dust and moisture.

100. 发明专利

JPH08135881A PRESSURE FLUCTUATION SUPPRESSING DEVICE 失效
公开(公告)号：JPH08135881A
公开(公告)日：1996-05-31
申请号：JP29888594
申请日：1994-11-08
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , KATO HIDEO , SATOU SOUFUMI , SATO SHINICHI
IPC分类号： F16L55/04 , F15D1/02 , G05D16/00
摘要： PURPOSE: To provide a pressure fluctuation suppressing device which does not markedly deteriorate the transport faculty for fluid and does not require the large arrangement space. CONSTITUTION: Inside a pipe 11 for gas transport, a number of fine pipes 15 having a prescribed length are bound and arranged. A fine pipe collection body consisting of the fine pipes 15 is equivalent to the inductance L of an electric circuit, and operates as acoustic filter for absorbing the pressure variation in the pipe. Though the fine pipe collection body includes the parasitic resistance (r), the magnitude is smaller than the resistance in the case where the conventional orifice is used, and also the pressure loss is small. Further, the necessity of the space over the pipe diameter as in the conventional chamber is obviated.

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