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1. 发明专利

JPH09183987A METHOD FOR RUNNING SEAWATER PUMP IN LNG VAPORIZER 失效
公开(公告)号：JPH09183987A
公开(公告)日：1997-07-15
申请号：JP34362995
申请日：1995-12-28
申请人： TOKYO GAS CO LTD
发明人： ARAKAWA MASAHIRO , KANEDA YUKIHIRO , KIZU YOSHIKAZU , SEKIGUCHI MASARU
IPC分类号： C10L3/06 , F17C9/02
摘要： PROBLEM TO BE SOLVED: To reduce the amt. of water sprayed in an LNG vaporizer to thereby reduce the power cost of a seawater pump. SOLUTION: In the method for running a seawater pump 8 by calculating the amt. of seawater supplied by the pump 8 by using the higher value of the two amts. of water: the necessary amt. of sprayed water obtd. by comparing the temp. of seawater at the entry side of an LNG evaporator 1 to be monitored with the designed conditions of the evaporator 1 and the amt. of sprayed water at the film-breaking limit, as the set amt. of sprayed water, the temps. of sprayed water at tubes 4 near the lower header part 3 of the panel 5 of the evaporator 1 are measured along the right-and-left direction to calculate the difference between each of the above-obtd. temps. and the temp. of seawater at the entry sides of each of the tubes 4; then the apparent amt. of sprayed water is calculated about each tube from the above-obtd. temp. difference, the flow rate of the LNG, the enthalpies of the entry-side LNG and the exit-side gas, and the specific heat of water sprayed; and the amt. of seawater supplied by the pump 8 is increased when the apparent amt. of sprayed water becomes lower than the above set amt.

2. 发明专利

JPH09183990A METHOD FOR MONITORING LNG EVAPORATOR 失效
公开(公告)号：JPH09183990A
公开(公告)日：1997-07-15
申请号：JP34362895
申请日：1995-12-28
申请人： TOKYO GAS CO LTD
发明人： ARAKAWA MASAHIRO , KANEDA YUKIHIRO , KIZU YOSHIKAZU , SEKIGUCHI MASARU
IPC分类号： C10L3/06 , F17C9/02 , G08B21/00
摘要： PROBLEM TO BE SOLVED: To enable the distinction of abnormalities in water spraying in an LNG evaporator. SOLUTION: The causes of abnormalities in water spraying in an LNG evaporator is distinguished as follows: the temp. of seawater at the entry side of an LNG evaporator to be monitored is measured; the temp. of sprayed water at the tubes 4 near the lower header 9 of the panel of the evaporator is measured along the right-and-left direction to calculate the difference between the temp. of seawater at the entry side and the temp. of the sprayed water as to each of the tubes; the apparent amt. of water sprayed is calculated from the above-obtd. temp. difference, the flow rate of an LNG, the enthalpies of the entry-side LNG and the exit-side gas, and the specific heat of the water sprayed; the picture of the surfaces of tubes near the lower header of the panel of the evaporator is taken with a camera 10 to collect dynamic images of water flowing down; the flow rate of water is calculated by extracting the motion vector of a localized notice zone from adjacent frames in the dynamic images; the true amt. of water sprayed as to each tube is calculated from the above-obtd. flow rate by using the known correlation of flow rate and amt. of flow; the abnormalities of water spray is detected as to each tube from the apparent amt. of water sprayed; and the causes of the abnormalities are determined by comparing the apparent amt. with the true amt. of water sprayed.

3. 发明专利

JPH0829261A PROTECTIVE GLASS FOR EXPLOSIONPROOF TEMPERATURE CAMERA 失效
公开(公告)号：JPH0829261A
公开(公告)日：1996-02-02
申请号：JP16817894
申请日：1994-07-20
申请人： TOKYO GAS CO LTD
发明人： KASAMA ICHIRO , ARAKAWA MASAHIRO , KIZU YOSHIKAZU , YAMASHITA AKIRA
IPC分类号： G01J5/04 , H04N5/225
摘要： PURPOSE:To obtain a protective glass which ensures the sufficient transmissivity of infrared rays and whose strength can satisfy the condition an explosionproof regulation by a method wherein a sapphire glass within a specific thickness is pasted on, and bonded to, the front of a silicon glass. CONSTITUTION:A protective glass 1 is fixed to the front of an explosionproof case 5 by means of a mounting utensil 6. The protective glass 1 is a circular glass in which a silicon glass 2 and a sapphire glass 4 on its front have been pasted. The silicon glass 2 is a single crystal of Si, and an antireflection coating film 8 is vapor-deposited on a pasting face to the sapphire glass 4. The sapphire glass 4 is a UV-grade sapphire, for infrared transmission of Al2O3, and its thickness is within 5mm. The sapphire glass 4 is pasted constantly on the silicon glass 2 by an adhesive. An adhesive which is based on an acrylic or the like is used as the adhesive, it is composed of a photoreactive resin which is hardened when it is irradiated with ultraviolet rays, and its thickness is made sufficiently thin so as no to affect the transmission of infrared rays.

4. 发明专利

JP2004011687A METHOD FOR RECOVERING/RESTORING NOZZLE MAIN-VALVE IN TANK IN OPERATION 审中-公开
公开(公告)号：JP2004011687A
公开(公告)日：2004-01-15
申请号：JP2002163022
申请日：2002-06-04
申请人： TOKYO GAS CO LTD , ISHIKAWAJIMA HARIMA HEAVY IND
发明人： HATTORI ATSUHIKO , ISHIYAMA HIROYUKI , KIZU YOSHIKAZU , TSUJI TATSUO
IPC分类号： B65D90/00 , F17C13/00 , F17C13/04
摘要： PROBLEM TO BE SOLVED: To provide a method for safely recovering/restoring a nozzle main-valve in a tank in operation. SOLUTION: This method comprises the following steps: in the first step, the main-valve B of the nozzle A is closed, and a connection bolt C of the nozzle A and the main-valve B is replaced by a temporarily tightening jig 1. In the 2nd step, the valve B is held by a main-valve holding jig 4 penetrated in a chamber 2, an expandable sealing stop 6 is attached to a sealing-stop guiding jig 7 penetrated in the chamber 2, then the chamber 2 is airtightly attached to the nozzle A. In the 3rd step, the temporarily tightening jig 1 is separated by a separating jig 3 penetrated in the chamber 2, and the main-valve holding jig 4 is drawn up to remove the valve 3 from the nozzle A. In the 4th step, the stop 6 is guided by the jig 7 to be fit to the opening of the nozzle A. In the 5th step, the stop 6 is expanded by a stop-expanding jig 8 penetrated in the chamber 2 and the opening of the nozzle A is closed. In the 6th step, the chamber 2 is removed, the jig 7 is separated from the stop 6, and the main valve B is recovered. COPYRIGHT: (C)2004,JPO

5. 发明专利

JPH08178199A MONITORING METHOD FOR LNG UNLOADING ARM 失效
公开(公告)号：JPH08178199A
公开(公告)日：1996-07-12
申请号：JP32828694
申请日：1994-12-28
申请人： TOKYO GAS CO LTD
发明人： ARAKAWA MASAHIRO , KANEDA YUKIHIRO , KIZU YOSHIKAZU
IPC分类号： F17D5/00 , H04N7/18
摘要： PURPOSE: To perform automatic detection abnormality by a method wherein the visual field direction of an infrared ray camera is followed and controlled according to position information from the input measuring device of an unloading arm and the unloading arm is monitored by means of the image of the infrared ray camera. CONSTITUTION: When a flange part 9 part is horizontally and vertically moved together with an LNG ship 11, the movement is detected by angle sensors 10a, 10b, and 10c and a position is measured by a position measuring device 16. Based on the measurements, a camera control device 17 controls the visual field direction of an infrared ray camera 14 and remote control operation is executed so that the objects to be monitored of the flange part 9 and swivel joints 5a, 5b, and 5c enter a visual field. Thus, the spot to be monitored is served to monitor abnormality corresponding to the interior of the visual field of the infrared ray camera 14. When leakage of LNG occurs in a spot to be monitored, an occurring low temperature part is automatically detected by means of an infrared ray image.

6. 发明专利

JPH08166325A ABNORMALITY MONITORING METHOD OF PLURALITY OF VALVES USING PNEUMATIC ACTUATORS 失效
公开(公告)号：JPH08166325A
公开(公告)日：1996-06-25
申请号：JP30782894
申请日：1994-12-12
申请人： TOKYO GAS CO LTD
发明人： ARAKAWA MASAHIRO , TANAKA TAKAAKI , KIZU YOSHIKAZU
IPC分类号： G01M13/00 , F16K31/12 , F16K51/00 , G01H17/00
摘要： PURPOSE: To obtain an abnormality monitoring method which automates the abnormality monitoring operation of a plurality of valves using pneumatic actuators in various plants or the like. CONSTITUTION: A moving body 6 at which a sound gathering device has been installed is constituted so as to be movable along a part near a plurality of valves 1a, 1b using pneumatic actuators such as air motors 2a, 2b or the like. At a point of time when an opening and shutting operation can be performed for an inspection, the moving body 6 is moved to the part near the valves, the valves are opened and shut by operating the pneumatic actuators, data on an operating sound or the like at this time is gathered, the gathered data is compared with data in a normal operation, and an abnormality is judged. Thereby, the abnormality of many valves utilizing the pneumatic actuators in a plant or the like can be detected without relying on human power and with high accuracy, the frequency of an abnormality monitoring operation can be increased sharply, and also a sign of an abnormality due to a change in a subtle discharge sound can be detected.

7. 发明专利

JP2004035027A Method for recovering and restoring accessory appliance in operation tank 有权
公开(公告)号：JP2004035027A
公开(公告)日：2004-02-05
申请号：JP2002193035
申请日：2002-07-02
申请人： Ishikawajima Harima Heavy Ind Co Ltd , Tokyo Gas Co Ltd , 東京瓦斯株式会社 , 石川島播磨重工業株式会社
发明人： HATTORI ATSUHIKO , ISHIYAMA HIROYUKI , KIZU YOSHIKAZU , TSUJI TATSUO
IPC分类号： B65D90/00 , F16L1/00 , F16L55/00 , F17C13/00
摘要： PROBLEM TO BE SOLVED: To provide a method for safely recovering and restoring an accessory appliance of an operation tank.
SOLUTION: This method comprises a step of changing a connection bolt C of a nozzle A to an accessory appliance B by a temporary tightening tool 1, a step of holding the accessory appliance B by an accessory appliance holding tool 4 passed through a nozzle chamber 2, fitting an expandable sealing plug 6 to a sealing plug guide tool 7 passed through the nozzle chamber 2, and fitting the nozzle chamber 2 to the nozzle A in an airtight manner, a step of loosening the temporary tightening tool 1 by a loosening tool 3 passed through the nozzle chamber 2, and pulling the accessory appliance holding tool 4 to detach the accessory appliance B from the nozzle A, a step of guiding the sealing plug 6 by a sealing plug guide tool 7 and fitting it to an opening of the nozzle A, a step of expanding the sealing plug 6 by a sealing plug expanding tool 8 passed through the nozzle chamber 2 to seal the opening of the nozzle A, and a step of removing the nozzle chamber 2, loosening the sealing plug guide tool 7 from the sealing plug 6 and recovering the accessory appliance B.
COPYRIGHT: (C)2004,JPO

8. 发明专利

JPH09183988A METHOD FOR EXTRACTING POINT OF INFLECTION OF TEMPERATURE IN MONITORING ABNORMALITY OF EVAPORATOR PANEL 失效
公开(公告)号：JPH09183988A
公开(公告)日：1997-07-15
申请号：JP34273895
申请日：1995-12-28
申请人： TOKYO GAS CO LTD
发明人： ARAKAWA MASAHIRO , KIZU YOSHIKAZU
IPC分类号： G01J5/48 , C10L3/06 , F17C9/02 , G08B21/00
摘要： PROBLEM TO BE SOLVED: To reduce the influence of noise in the method for monitoring the icing of an evaporator panel using the point of inflection of a temp. profile obtd. with an infrared camera. SOLUTION: The point of inflection is obtd. by taking a photograph of an evaporator panel 1 to be monitored with an infrared camera 7 to obtain a temp. image, dividing the image into a plurality of band-form treating units wherein pixels continue in the longitudinal direction, finding a discrete sequence of numbers corresponding to the temp. change in the longitudinal direction as to each of the treating units, forming a spline curve from the sequence, and subjecting the spline curve to differential calculus twice.

9. 发明专利

JPH08178200A MONITORING METHOD FOR LNG UNLOADING ARM 失效
公开(公告)号：JPH08178200A
公开(公告)日：1996-07-12
申请号：JP32828794
申请日：1994-12-28
申请人： TOKYO GAS CO LTD
发明人： ARAKAWA MASAHIRO , KANEDA YUKIHIRO , KIZU YOSHIKAZU
IPC分类号： F17D5/00 , H04N7/18
摘要： PURPOSE: To perform automatic detection of abnormality by a method wherein the visual field direction of a camera for monitoring is followed and controlled by means of position information from the position measuring device of an unloading arm and the unloading arm is monitored by means of the images of a visible light camera and an infrared ray camera. CONSTITUTION: When a flange part 9' is horizontally and vertically moved together with an LNG ship 11, the movement is detected by angle sensors 10a, 10b, and 10c and a position is measured by a position measuring device 16. Based on the measurements, the visual field direction of a camera 14 for monitoring is controlled by a camera control device 17, and remote control is performed so that the spots to be monitored of the flange part 9 and swivel joints 5a, 5b, and 5c enter a visual view. Thus, the spot to be monitored is served to detect abnormality corresponding to the interior of the visual field of the camera 14 for monitoring. When leakage of LNG occurs to a spot to be monitored, an occurring low temperature part is automatically detected by an infrared ray camera. Further, the abnormality of an arm 1 is detected by a visual light camera.

10. 发明专利

JPH10253444A DETECTING METHOD FOR ABNORMAL SOUND, MECHANICAL ABNORMALITY JUDGING METHOD USING ITS DETECTED VALUE, SIMILARITY DETECTING METHOD FOR OSCILLATORY WAVE, VOICE RECOGNIZING METHOD USING ITS DETECTED VALUE 失效
公开(公告)号：JPH10253444A
公开(公告)日：1998-09-25
申请号：JP6100797
申请日：1997-03-14
申请人： TOKYO GAS CO LTD , MITSUBISHI HEAVY IND LTD , ENTOROPII SOFTWARE KENKYUSHO K
发明人： JINNAI NORIHIRO , YAMAGUCHI HIROSHI , ISHIHARA YOSHINAO , OSHIMA ATSUSHI , TAGUCHI FUJITAKA , ARAKAWA MASASUKE , KIZU YOSHIKAZU
IPC分类号： G01H3/08 , F22B37/42 , G01H3/00 , G01H17/00 , G10L15/10 , G21C17/00
摘要： PROBLEM TO BE SOLVED: To detect an abnormal sound and judge the abnormality of a machine from the detected value with high accuracy by obtaining the accurate shape distance value between a standard pattern vector and an input pattern vector. SOLUTION: A microphone 2 is arranged at a fixed position near a machine 1, and it measures the sound wave generated by the machine 1 and outputs it as a signal. This signal is inputted to multiple (m) filters 3 having different passing frequency bands, the frequency component waves of the sound wave are extracted and inputted to A/D converters 4, and they are converted into digital signals by the A/D converters 4 periodically at the same time and inputted to an arithmetic device 5. Shape-changed reference pattern positive and negative vectors differ in sharpness according to the positional relation between the center of normal distribution and standard and input pattern vectors, the center of the normal distribution is relatively moved to the vector position to obtain the differences of sharpness, and the square root of the sum of squares of the values is detected at the shape distance value between the vectors. An abnormality is judged based on this distance value, the shape change can be accurately detected, and the accuracy of abnormality detection can be improved.

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