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1. 发明公开

EP0072105A3 Assessment of life of duct 失效
标题翻译：道路寿命评估
公开(公告)号：EP0072105A3
公开(公告)日：1984-07-18
申请号：EP82303636
申请日：1982-07-12
申请人： British Gas Corporation
发明人： Starr, Frederick
IPC分类号： F17D05/00 , G07C03/00
CPC分类号： F17D5/00 , G07C3/00
摘要： A method and apparatus are provided for assessing the overall lifetime tr until failure of a duct carrying fluid at elevated temperatures and pressures. Sensors located in the duct which can be a pipe sense the pressure of the fluid and its temperature at a multiplicity of points along the pipe. The sensors emit voltage signals which are multiplexed and converted to pulses of a frequency proportional to voltage at 1. The pulses are counted in a fixed time to determine a value for the pressure and temperature in a microcomputer 1. The microcomputer 1 is programmed to calculate a value of hoop stress σ from the pressure values and the measured value of σ is used to determine the relevant value of the Larson Miller parameter P from values thereof stored as a calibration curve against σ in the microcomputer. The computer then calculates the value of tr from the equation: where T is the temperature in °K and C is a constant. C can be taken as being equal to 20 and the life fraction tF(m) of the pipe used up between sequential signal samples of the same temperature sensor is determined by the computer from the equation: where t1 is the time of the last or current sample, t2 is the time of the last but one sample, and tr1 is that value of tr derived from the current temperature signal. The computer 1 integrates tF(m) to determine the overall fraction. LtF(m) of the life of the pipe used up in the period during which the pipe has been carrying fluid. Failure of the pipe is indicated when ΣtF(m)=1.

2. 发明公开

EP0212456A3 Piping travelling apparatus 失效
标题翻译：管道搬运设备
公开(公告)号：EP0212456A3
公开(公告)日：1987-10-14
申请号：EP86110885
申请日：1986-08-06
申请人： HITACHI, LTD. , TOKYO GAS CO., LTD.
发明人： Takagi, Atsushi , Kurita, Shinichi , Watahiki, Seishi , Sakuma, Yasuzi , Sakamoto, Kiyoshi , Sato, Chikara
IPC分类号： G21C17/00 , G01M03/00 , F17D05/00
CPC分类号： G21C17/017 , F16L55/30 , F16L55/32 , F16L2101/30
摘要： A piping travelling apparatus having a plurality of continuous treads (15) driven by motors (10) through transmission gearing (11). The continuous treads are mounted to a frame (20) and spaced apart a predetermined distance peripherally of the inner wall surface of the piping (3). At least one of the continuous treads is kept in contact with the inner wall surface of the piping no matter what the posture of the apparatus may be, so that the apparatus can travel without any trouble even if its posture undergoes a change when it moves along elevations and depressions on the inner wall surface of the piping or negotiates the boundary between different levels of the inner wall surface or bends of the piping. The apparatus enables a travel through piping of relatively small diameter having vertical or steeply slanted pipes to be made without any trouble.

3. 发明公开

EP0161689A3 Chain-like self-moving robot and control system therefor 失效
标题翻译：链式自动机器人及其控制系统
公开(公告)号：EP0161689A3
公开(公告)日：1987-04-15
申请号：EP85106068
申请日：1985-05-17
申请人： HITACHI, LTD. , TOKYO GAS CO., LTD.
发明人： Takagi, Atsushi Ikebukuro Apartment 1305 , Izumi, Shigeru , Takahashi, Fuminobu , Sato, Chikara , Naito, Shinji , Sonoda, Shinji
IPC分类号： F17D05/00 , G01M03/00 , B08B09/04
CPC分类号： G01M3/005 , B08B9/0551 , F16L55/34
摘要： A chain-like self-moving robot includes three or more capsule units (a 1 , a 2 , ..., a N ) connected to one another in a string by means of couplers (b 1 , b 2 , ..., b N ; 112K). By expanding and contracting intercapsule spaces in a predetermined sequence so that a smaller number of the capsules are moved while a larger number of capsules remain stationary, the chain-like robot can move forwardly or backwardly.

4. 发明公开

EP0047032A3 A method for determination of internal pipeline or tubing corrosion 失效
标题翻译：一种用于确定内部管道或管道腐蚀的方法
公开(公告)号：EP0047032A3
公开(公告)日：1982-03-17
申请号：EP81200896
申请日：1981-08-10
申请人： SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
发明人： Goolsby, Alvin Dale , Hesselman, Ignatius Aloysius Maria
IPC分类号： F17D05/00 , G01M03/00
CPC分类号： G01B13/10 , G01M3/005 , G01N17/00
摘要： A method for determining the variations of the internal condition of a pipeline or tubing (1), by propelling a pig (2), which is sealed against the pipeline or tubing wall, through the pipeline by means of a constant flowing driving fluid comprising the steps of continuously measuring (5) and recording (6) the pressure of the said driving fluid or the pressure differential across the pig (2) during pigging of the pipeline or tubing (1) and deriving from the recorded pressure signals a plurality of quantities representative for the pressure variations in selected successive intervals of the pipeline or tubing (1), each interval having a predetermined length, in such a way that the total length of the pipeline or tubing to be inspected is covered, and comparing the values of the quantities thus obtained with reference data of these quantities, and deriving from said comparison information as to the internal diameter variations of the pipeline or tubing (1) being inspected.

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