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1. 发明专利

JPH04203896A STEAM GENERATOR 失效
公开(公告)号：JPH04203896A
公开(公告)日：1992-07-24
申请号：JP33050690
申请日：1990-11-30
申请人： HITACHI LTD
发明人： SUZUKI TOSHIHIRO , KASHIWAKURA JUN , TSUDA KATSU
IPC分类号： F28F1/00 , F28D7/16 , F28F11/00
摘要： PURPOSE:To detect promptly if a double-heat transfer tube is damaged, identifying said double-heat transfer tube at the same time and hence enhance reliability and safety by laying out fluid plenum 7 detect the damage of said heat transfer tube for each tube. CONSTITUTION:Helium plenum 43 is provided for every double-heat transfer tube 1. Therefore, it is possible to identify the outer pipe 21 of a double-heat transfer tube 1 by discriminating which helium plenum 43 has lowered its pressure when the outer pipe 21 of the double heat transfer tube 1 is damaged during operation. Furthermore, the clearance between the inner surface of the outer pipe 21 of the double-heat transfer tube land the outer surface of the inner tube is filled with helium whose pressure is identical to plenum 43 or the plenum is flowing in the clearance. As helium flows out from this clearance to the side of sodium, the pressure of helium drops. It is, therefore, possible to detect the damage of the outer pipe of the double-heat transfer tube 1 in an early stage.

2. 发明专利

JPS62278447A TUBE INSERTION TYPE ULTRASONIC FLAW DETECTION PROBE 失效
公开(公告)号：JPS62278447A
公开(公告)日：1987-12-03
申请号：JP12125886
申请日：1986-05-28
申请人： HITACHI LTD
发明人： SAKAI TOYOHIDE , TSUDA KATSU , TAKAHASHI YOICHI
IPC分类号： G01N29/04 , G01N29/26 , G01N29/265
摘要： PURPOSE:To enable smooth adaption to changes in the inner diameter of a tube, by arranging a centering fin to be expanded or reduced freely with the tube utilizing a force of a fluid therein and hold an ultrasonic probe at a correct position. CONSTITUTION:A pair of taper guides 4 each having a tapered surface mounted concentrically are provided on both end faces of an ultrasonic probe body 2. A pair of centering fins 3 have an outer cylindrical section 3b to be inserted internally into a tube 1 to be inspected and an inner cylindrical section 3c to be inserted externally into the taper guides 4 connected with a pressure receiving section 3a. The outer cylindrical section 3b is provided with a through hole 6. The centering fins 3 is divided into two circumferentially. The taper guides 4 each have a dowel groove-shaped tapered groove 5 and holds the centering fins 3 thus divided into two. Then, as the inner cylindrical section 3c slides along the tapered surface of the taper guide 4 with the centering member 3 receiving a force of a fluid, the diameter of the outer cylindrical section 3b is expanded or reduced thereby always holding the probe body 2 at a proper position.

3. 发明专利

JPH0526852A FLAW-DETECTING PROBE FOR PIPING 失效
公开(公告)号：JPH0526852A
公开(公告)日：1993-02-02
申请号：JP17796291
申请日：1991-07-18
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TSUDA KATSU , SONODA SHINJI , HANAWA HARUYUKI
IPC分类号： G01N29/04 , G01N29/22 , G01N29/26
摘要： PURPOSE:To enable an inspection device inserted into a piping to be moved smoothly and obtain a structure with a high structural reliability and a component structure constituting the structure. CONSTITUTION:A coil springy 4 formed spirally is mounted to an outside of an outer-shell member (bellows) 5 which interlocks a flaw-detecting unit 1 constituting a piping flaw-detecting probe. A coil spring 4 allows a traveling driving axial force between the flaw-detecting element units to be transmitted and protects the bellows 5 against contact or an external force. thus enabling drive characteristics and structural soundness of the probe to be secured.

4. 发明专利

JPH0377401B2 失效
公开(公告)号：JPH0377401B2
公开(公告)日：1991-12-10
申请号：JP1919384
申请日：1984-02-03
申请人： HITACHI LTD
发明人： KASHIWAKURA JUN , TSUDA KATSU , ABE KOJI
IPC分类号： F22B1/06

5. 发明专利

JPS6383501A STEAM GENERATOR 失效
公开(公告)号：JPS6383501A
公开(公告)日：1988-04-14
申请号：JP22815286
申请日：1986-09-29
申请人： HITACHI LTD
发明人： NEMOTO KIYOMITSU , YAMAGATA YASUO , YAMAMOTO HAJIME , SUMIDA ISAO , SHIMOYASHIKI SHIGEHIRO , HIKICHI TAKAYOSHI , TSUDA KATSU
IPC分类号： F22B1/06

6. 发明专利

JPS60205253A VIBRATION PROOF STRUCTURE OF FLAW DETECTION PROBE 失效
公开(公告)号：JPS60205253A
公开(公告)日：1985-10-16
申请号：JP6068184
申请日：1984-03-30
申请人： HITACHI LTD
发明人： SAKAI TOYOHIDE , TSUDA KATSU , ABE KOUJI
IPC分类号： G01N27/82 , G01N27/90 , G01N29/04 , G01N29/265
摘要： PURPOSE:To prevent the lowering of the flaw detection performance due to vibrations of a cable and pressure receiving bodies by providing openings inside the pressure receiving bodies adjacent to a flaw detection probe before and after it. CONSTITUTION:Openings 30 are provided inside several pressure receiving bodies adjacent to a flaw detection probe 25 inserted into a heat exchanger tube 3. Here, the flow 27a of a fluid 27 runs into the openings 30. This can reduce a vortex area generated by the flow 27a along the outer surface of the pressure receiving bodies 24 thereby preventing vibrations of a cable 26 and the pressure receiving bodies 24 due to a vortex generated in the after flow of the pressure receiving bodies 24.

7. 发明专利

JPH10132187A METHOD FOR SEEING INSIDE OF PIPING AND FACILITY TO BE USED FOR IT 失效
公开(公告)号：JPH10132187A
公开(公告)日：1998-05-22
申请号：JP28366896
申请日：1996-10-25
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： MATSUSHITA YUICHI , TAZAWA KENYA , TAYAMA OSAMU , OGINOYA YASUMASA , HASHIZUME YOICHI , TSUDA KATSU , YANO TEIICHI , OUCHI KOICHI
IPC分类号： F16L55/00 , G01N21/88 , G02B23/24 , G21C17/003
摘要： PROBLEM TO BE SOLVED: To inspect the inside of a piping from a remote place by naked eyes by reducing cutting parts of the piping. SOLUTION: A guide pipe 7 arranged in a collection pipe 1 by being guided by a core wire guided by an insertion port guide 5, and having flexibility is pressed and advanced while the guide pipe tip is separated from the core wire tip while being suspended in the nearest branch pipe, and the guide pipe 7 reaches a part near the observation target part by further being pressed from the outside of a nozzle 2. After that, the core wire is removed from the nozzle 2 to the outside, a macrographic device 4 is pressed and advanced into the guide pipe 7 to reach the inside of the specified branch pipe subjected to observation, and the inside of the specified branch pipe is inspected by eyes without cutting respective pipes.

8. 发明专利

JPH01305351A INSPECTING APPARATUS 失效
公开(公告)号：JPH01305351A
公开(公告)日：1989-12-08
申请号：JP13551088
申请日：1988-06-03
申请人： HITACHI LTD
发明人： KINO HIROTOSHI , TAKESUTE YOSHINORI , OKADA HISAO , TSUDA KATSU , KAKINUMA YUKIO
IPC分类号： G01N29/44 , G01N29/04 , G01N29/30
摘要： PURPOSE:To perform highly reliable inspection by searching the maximum amplitude value among signals which are detected from the same signal source with a plurality of transmitting and receiving channels in real time, and automatically calibrating the sensitivity. CONSTITUTION:In a probe 2, one - N pieces of transmitting and receiving parts 201 are arranged on the circumference of the probe. The transmitting and receiving operations of each channel are electronically switched. An ultrasonic wave beam is rotated and scanned at a high speed. The received signals in each channel are outputted through a piece of cable in time series. A reference defect is provided in a sensitivity calibrating test piece 1. When the probe 2 passes the test piece 1 and a detected echo signal is obtained from the reference defect, a maximum-amplitude searching circuit 13 takes out the maximum amplitude in the same channel. A gain-correction setting circuit 14 outputs data for correcting the amplitude gain of a sensitivity averaging circuit 8 based on the obtained value. The sensitivity of each channel is corrected with the circuit 8 based on said data. The echo signal which is obtained from the reference defect can be adjusted so that a specified wave height value is obtained on the screen of a display part 12.

9. 发明专利

JPS6383692A HEAT PIPE TYPE REACTOR 失效
公开(公告)号：JPS6383692A
公开(公告)日：1988-04-14
申请号：JP22815586
申请日：1986-09-29
申请人： HITACHI LTD
发明人： SHIMOYASHIKI SHIGEHIRO , YAMAMOTO HAJIME , SUMIDA ISAO , HIKICHI TAKAYOSHI , NEMOTO KIYOMITSU , OZAWA KAZUMASA , TSUDA KATSU
IPC分类号： G21C15/14

10. 发明专利

JPS5845496A HEAT TRANSMITTING PIPE SUPPORTING STRUCTURE 失效
公开(公告)号：JPS5845496A
公开(公告)日：1983-03-16
申请号：JP14389481
申请日：1981-09-14
申请人： HITACHI LTD
发明人： SAKAI TOYOHIDE , TSUDA KATSU , ABE KOUJI
IPC分类号： F28F9/013
摘要： PURPOSE:To secure the excellent functioning of the heat transmitting pipe by a method wherein friction at a sliding part is turned into rolling friction by a spherical ball and the vibration of the heat transmitting pipe is softened by the resilience of a load absorbing spring. CONSTITUTION:In case a contact between the heat transmitting pipe 5 and the heat transmitting pipe supporting fixture 19 is caused by liquid vibration in the heat transmiting pipe or the vibration upon earthquake, the vibration is transmitted through the spherical ball bearing 21, contacting with the sliding surface of the heat transmitting pipe, and the load absorbing spring 20 provided in the heat transmitting pipe supporting fixture and is softened by the resilience of the spring before it is transmitted to the heat transmitting pipe supporting fixture 19, therefore, the heat transmitting pipe 5 will never contact with the fixture 19 directly and thereby securing the excellent functioning of the heat transmitting pipe 5 for a long period of time.

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