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71. 发明专利

JPH08135880A PRESSURE FLUCTUATION SUPPRESSING DEVICE 失效
公开(公告)号：JPH08135880A
公开(公告)日：1996-05-31
申请号：JP29888494
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： G01F1/00 , F16L55/04 , G05D16/00 , G05D16/06
摘要： PURPOSE: To provide a pressure variation suppressing device which does not require the large arrangement space, free from the remarkable reduction of the fluid transfer faculty due to pressure loss. CONSTITUTION: When the gas pressure in an inlet side pipe 22 varies in the increase direction, a portion (arrow 57) of the pressure increase is branched into a bypass pipe 24, and reaches a gas chamber 26, and the rest (arrow 58) propagates in the inlet side pipe 22, and reaches the inlet of a fluidic flow rate meter 32. In the gas chamber 26, a pressure difference is generated between on both the sides of a diaphragm 27, and the diaphragm 27 is shifted toward an outlet side pipe 23 by the portion for eliminating the pressure difference. Accordingly, the pressure at the outlet of the fluidic flow rate meter 32 and the pressure at the inlet are balanced. When the gas pressure in the inlet side pipe 22 varies in the reduction direction, the action reverse to the above- described is performed, and the diaphragm 27 shifts toward the inlet side pipe 22, and the inlet pressure of the fluidic flow rate meter 32 and the outlet pressure are balanced.

72. 发明专利

JPH0875512A FLUIDIC FLOWMETER 失效
公开(公告)号：JPH0875512A
公开(公告)日：1996-03-22
申请号：JP24202994
申请日：1994-09-08
申请人： TOKYO GAS CO LTD , OSAKA 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： KIMURA YUKIO , SATO TAKAHITO , MIZUKOSHI YASUSHI , NUKUI KAZUMITSU , OKAMURA SHIGENORI , KANDA KOICHI , NAMIMOTO MASANOBU , ISSHIKI HISASHI , KAMITE MINEYUKI
IPC分类号： G01F1/20 , G01F1/72 , G01F7/00
摘要： PURPOSE: To measure the flow rate while suppressing the error even upon pulsation of a fluid by determining the areas at the inlets of a bypass channel and a measuring nozzle such that the frequency of pressure oscillation of the fluid does not equal to integer times of pulsation frequency or a fraction of an integer thereof. CONSTITUTION: A fluid flowing into a flowmeter body 19 is shunted through a partition plate 35 and a regain mesh 29 to a bypath 36, a flowmeter section 37, and a flow sensor inlet 38. Pressure oscillation is measured based on the differential pressure of the fluid flowing into a flow rate measuring section 37 between the opposite sides of the outlet of a measuring nozzle 11 and then the frequency is analyzed thus determining the current velocity. The ratio between the area of a bypath 20 and the inlet area of the nozzle 11 is determined such that the frequency of pressure oscillation does not equal to inter times or a fraction of an integer of the frequency 6-21Hz of pulsation generated in a gas engine heat pump disposed in the upstream of the body 19. For example, the width W2 of the inlet 20 having height H2 of 9 mm is set at 30, 18 and 11.5mm for the nozzle 11 having inlet width W1 and height H2 of 22mm.

73. 发明专利

JPH0835864A FLUIDIC FLOW METER 失效
公开(公告)号：JPH0835864A
公开(公告)日：1996-02-06
申请号：JP19284994
申请日：1994-07-25
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SATO SHINICHI
IPC分类号： G01F1/20 , G01F3/22
摘要： PURPOSE:To realize low cost by simplifying the automatic assembling process of fixing an shut-off valve. CONSTITUTION:A partition wall 13 in the main body 10 is provided in the flow path between an inlet 11 and an element part and has a surface perpendicular to the fluid flow-in direction. On this partition wall 13, an opening 16 for fluid passing is formed. At the upper part of the partition wall 13, a space 34 for setting a shut-off valve is provided. The shut-off valve 40 can be fixed from above the main body 10 of the space 34 for shut-off valve and blocks the flow path from the downstream side of the partition wall 13.

74. 发明专利

JPH0829216A FLUIDIC GAS METER 失效
公开(公告)号：JPH0829216A
公开(公告)日：1996-02-02
申请号：JP16378194
申请日：1994-07-15
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , SATO SHINICHI
IPC分类号： G01F1/20 , G01F3/22 , G01F15/18
摘要： PURPOSE:To enable fixing a fluidic gas meter of hanging type after removing an existing N-type gas meter. CONSTITUTION:By providing besides a lower gas inlet 5 and a lower gas outlet 6, upper gas inlet 3 and upper gas outlet 4 with adjusted interval between the inlet and outlet connectors of existing N-type gas meter to the upper part of a fluidics gas meter 1. The connection pipe 16 of the existing N-type gas meter is directly connected to the upper gas inlet 3 and the upper gas outlet 4 and a fluidic gas meter 1 of hanging type is fixed.

75. 发明专利

JPH0829213A FLOW METER 失效
公开(公告)号：JPH0829213A
公开(公告)日：1996-02-02
申请号：JP18405094
申请日：1994-07-13
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , KATO HIDEO
IPC分类号： G01F1/00 , F16L55/04 , G01F3/22
摘要： PURPOSE:To provide a flow meter having a function of easily and exactly estimating pipe length regardless of the piping length even in the case of increase in number of branches in the piping. CONSTITUTION:When the length of downstream piping 23 is measured, a gas cock 22 is closed. Then sound wave is generated from a sound source 13 in a flow meter 10 with variation of frequency and pressure fluctuation is generated. With a pressure sensor 14, pressure fluctuation amplitude (P1) is detected and with a pressure sensor 16, pressure fluctuation amplitude (P2) is detected. A pressure fluctuation ratio of them (P2/P1) is calculated for every frequency and the resonance characteristics of the downstream piping 23 is calculated. When the length of upstream piping 21 is measured, a gas cock 24 is closed. Then sound wave is generated from a sound source 15 in a flow meter 10 with variation of frequency and pressure fluctuation is generated. A pressure fluctuation ratio (P2/P1) is calculated for every frequency and the resonance characteristics of the downstream piping 21 is calculated.

76. 发明专利

JPH0821753A SHUT-OFF VALVE CONTROLLER FOR GAS METER 失效
公开(公告)号：JPH0821753A
公开(公告)日：1996-01-23
申请号：JP17765894
申请日：1994-07-06
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , SATO SHINICHI
IPC分类号： G01F1/20 , F23N5/24 , G01F3/22 , G05D7/06
摘要： PURPOSE:To reduce the influence of pressure change to a gas meter without gas supply failure. CONSTITUTION:A piezoelectric film sensor 35 detects a fluidic oscillation. The output of the sensor 35 is amplified by an amplifier 71, and a pulse is generated from a digitizer 72. A timer 73 counts a predetermined time, and a counter 75 counts the pulse. When the counted value of the counter 75 does not reach a count-up value and the timer 73 counts the predetermined time, a shut-off vale is made to be in a state to reduce its pressure change by an actuator control circuit 77. When the counted value of the counter 47 reaches the count-up value before the timer 73 counts the predetermined time, the valve is switched to be in a state in which the entire opening is opened by the circuit 77 at that time point.

77. 发明专利

JPH085432A GAIN CORRECTING APPARATUS FOR THERMAL TYPE FLOW VELOCITY SENSOR FOR GAS METER 失效
公开(公告)号：JPH085432A
公开(公告)日：1996-01-12
申请号：JP16454894
申请日：1994-06-23
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , SATO SHINICHI
IPC分类号： G01F1/00 , G01F1/20 , G01F1/68 , G01F1/696
摘要： PURPOSE:To surely correct the gain of a thermal type flow velocity sensor at the time of practical use and correct the error attributed to the difference of the density of air and a gas. CONSTITUTION:A gain correcting circuit 41 corrects the gain of a flow velocity sensor 30 corresponding to the difference of the density of air and a gas when the fluid which passes the inside of a gas meter is changed from air to gas. A flow rate computing part 5 takes the data, which is obtained by analog/digital conversion of the output of the gain correcting circuit 41 by an A/D converter 42, and computes the flow rate.

78. 发明专利

JPH085431A FLOW METER 失效
公开(公告)号：JPH085431A
公开(公告)日：1996-01-12
申请号：JP16066494
申请日：1994-06-20
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , KONDA NORIHIRO
IPC分类号： G01P5/12 , G01F1/68 , G01F1/69 , G01F1/696
摘要： PURPOSE:To measure flow rate at high precision independently of the current speed distribution by a flow meter with a simple structure. CONSTITUTION:In a current speed detecting circuit 20, heat-generating wires 151, 152, 153,..., 15N for respective current speed sensors installed in a plurality of positions in a pipe are connected in parallel with a common electric power source 21 and the value corresponding to the total of the current flowing in the respective heat-generating wires 151, 152, 153,..., 15N is sent out of output terminals 20a, 20b as a parameter. A computing circuit 23 computes the flow rate of a fluid flowing in the pipe based on the output of the current speed detecting circuit 20.

79. 发明专利

JPH085419A FLOW METER 失效
公开(公告)号：JPH085419A
公开(公告)日：1996-01-12
申请号：JP16066594
申请日：1994-06-20
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU
IPC分类号： G01F1/32 , G01F1/00 , G01F7/00
摘要： PURPOSE:To improve the measurement precision for a low flow rate range by a current sensor and at the same time make measurement possible for a large flow rate range and thus measure flow rate in a wide range precisely. CONSTITUTION:In a sensor unit 13, three current sensors 121-123 for a low flow rate range and an eddy detecting sensor 18 for a large flow rate range are installed. In a small flow rate range covering a set flow rate or less, current speed is measured at a plurality of points in the same cross-section in a pipeline 11 by the current sensors 121-123, the average of these measured values is computed, and the flow rate is computed based on the average current speed value. Meanwhile, in a large flow rate range, frequency (the number of eddies) of Karman vortexes is detected when a gas (a) passes both sides of the sensor unit 13 and the flow rate is computed based on the detected result.

80. 发明专利

JPH07333017A FLOWMETER 失效
公开(公告)号：JPH07333017A
公开(公告)日：1995-12-22
申请号：JP15421694
申请日：1994-06-13
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , SAKAI KATSUTO , SATO SHINICHI
IPC分类号： G01F1/00 , G01F1/20 , G01F1/68 , G01F15/02
摘要： PURPOSE:To measure a flow rate accurately by allowing a zero-point correction accurately when the flow rate is zero free from the effect of any disturbance such as pressure change. CONSTITUTION:It is judged by a zero flow rate judging means 21 whether the flow rate measured with a flow sensor 10 is zero or not and when it is determined to be zero, a cutoff valve 30 is driven by a cutoff valve drive means 22 to cut a gas passage. After the cutting of a fluid passage by the cutoff valve drive means 22, a zero-point correction of the flow sensor 10 is performed by a zero-point correction means 23. Thus, such a sequence set after the driving of the cutoff valve 30 enables the accomplishing of the zero-point correction when the flow rate is zero without fail.

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