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1. 发明专利

JPH09202908A METHOD FOR HOLDING HEAT IN HOT STOVE 失效
公开(公告)号：JPH09202908A
公开(公告)日：1997-08-05
申请号：JP2741396
申请日：1996-01-23
申请人： NIPPON STEEL CORP
发明人： KAWAMURA TAKUSHI , TAKAHASHI AKIRA , ANAMI KUNIYOSHI , KAWAMURA KOJI
IPC分类号： C21B9/00
摘要： PROBLEM TO BE SOLVED: To execute the heat-holding and the temp.-raising of a hot stove without executing a special heat holding piping work and without using a combustion equipment exclusively used to heat-holding and to continue the ordinary operation of a blast furnace during heat-holding of a hot stove. SOLUTION: The hot stoves for raising the temp. of the air supplied to the blast furnace from blowers are parallel arranged in three or more sets and at the time of holding the heat of the hot stove to repair or check combustion-piping system of an arbitrary hot stove, a temp.-raising process of the hot stove out of operation, in which one set of the hot stove is stopped during the operation of the blast furnace and a part of hot blast supplied to the blast furnace from the other hot stoves used to the operation of the blast furnace is divided to the hot stove out of operation, and a cooling process of the hot stove out of operation, in which a part of cold blast supplied to the other hot stove used to the operation is divided to the hot stove out of operation, are repeatedly executed.

2. 发明专利

JPH058779B2 失效
公开(公告)号：JPH058779B2
公开(公告)日：1993-02-03
申请号：JP12887984
申请日：1984-06-22
申请人： NIPPON STEEL CORP
发明人： KAWAMURA KOJI , ISHIMATSU AKIRA , SUGITA KOICHI , NAKAME MASATAKA
IPC分类号： G01N29/04 , G01N29/265

3. 发明专利

JPH02173562A METHOD AND DEVICE FOR ULTRASONIC FLAW DETECTION FOR STEEL PIPE 失效
公开(公告)号：JPH02173562A
公开(公告)日：1990-07-05
申请号：JP32794288
申请日：1988-12-27
申请人： NIPPON STEEL CORP , NITTETSU TEKUNOSU KK
发明人： HORIKOSHI KIYOMI , NIIYAMA FUMIHIKO , KAWAMURA KOJI
IPC分类号： G01N29/04
摘要： PURPOSE:To efficiently execute the flaw detection of electric resistance welded tubes having the same outside diameter and different wall thickness by allowing and ultrasonic wave to be made incident from the outside wall surface of the tube and propagating it in the tangential direction. CONSTITUTION:Ultrasonic wave generators U1, U2, U3 and U4 of a flaw detector are housed in an enveloped body filled with water, and an ultrasonic wave is made incident from the outer wall surface of an electric resistance welded tube 28. Subsequently, the incident angle is set so that the propagation direction at the time of refraction becomes the tangential direction of the tube 28, and the arrangement interval is set so that the tube 28 is irradiated by an ultrasonic wave at an equal interval along a weld zone W of the tube 28. In this state, a receiving means receives a reflected echo of the ultrasonic wave, a comparing means compares the reflected echo by a prescribed threshold, a recording means records the result of comparison, and a sensitivity changing means changes sensitivity of the receiving means in accordance with wall thickness of the tube. According to such a constitution, even if a droplet of soluble oil adheres to the inside surface of the tube, it does not occur that the adhering part is misconceived as a defective part, and also, even if wall thickness of the tube is different, if the outside diameter is the same, the flaw detection is executed without necessitating to change setting a position of the ultrasonic wave generator and the work efficiency of flaw detective can be improved.

4. 发明专利

JPS6264948A METHOD FOR DETAILED FLAW DETECTION OF WELDED PART 失效
公开(公告)号：JPS6264948A
公开(公告)日：1987-03-24
申请号：JP20497185
申请日：1985-09-17
申请人： NIPPON STEEL CORP
发明人： ASANUMA SHINJI , HIDAKA TETSUYA , KAWAMURA KOJI , HIRAMOTO KIYOHARU
IPC分类号： G01N29/04
摘要： PURPOSE:To enable detailed inspection and the judgement of a flaw by certainly detecting only a harmful flaw, by arranging probes each having a narrow beam width in a mesh pattern so that the passing loci of the ultrasonic beams from the probes mutually have proper superposed flanges. CONSTITUTION:A preset area to be inspected, the positions of probes known in relative positional relation, a flaw position classified by a flaw kind, an echo height and a flaw length are preliminarily stored in the judge matrix of a signal processor 26' and, at first, an echo position 21 and and echo height 22 are obtained from a flaw detection signal 20 in a flaw detection apparatus 20'. The position 21 is corrected by the seam monitor signal 23 from a seam monitor apparatus 23'. A length measuring device 17' takes synchronous relation to the apparatus 20' and performs the measurement of a flaw length 18 and a position 19 in a longitudinal direction due to a flaw echo in a real time. The matrix 26 having taken in these signals compares the kind, size and acceptance of a flaw with preset information to evaluate the same and subsequently performs the delivery of a spray marker 24 to a material to be inspected and that of a signal to the automatic input to an on-line computer system 25.

5. 发明专利

JPS6140940B2 失效
公开(公告)号：JPS6140940B2
公开(公告)日：1986-09-11
申请号：JP5446778
申请日：1978-05-10
申请人： NIPPON STEEL CORP
发明人： MYAGAWA KAZUO , SASAKI YUKITO , KAWAMURA KOJI , SATO SHUICHI , NINOMYA TAKASHI , NAMIHANA TOSHIO
IPC分类号： G01B17/02 , G01N29/04

6. 发明专利

JPS6157875A Microwave range measuring instrument 失效
标题翻译： MICROWAVE范围测量仪器
公开(公告)号：JPS6157875A
公开(公告)日：1986-03-24
申请号：JP17927384
申请日：1984-08-30
申请人： Nippon Steel Corp , Nittetsu Densetsu Kogyo Kk , Yaskawa Electric Mfg Co Ltd
发明人： KAWAMURA KOJI , WATANABE KUNIO , NAGATA SHUNSUKE , URASAWA YOSHIKI , NAKAJIMA KOJI , SHIMADA KATSUHIKO , TAKEDA ATSUO , NISHI MASAO
IPC分类号： G01S13/34 , G01S13/46
CPC分类号： G01S13/34
摘要： PURPOSE:To measure the molten iron level in a torpedo car with simple constitution by detecting the beat signal due to the mixing of a transmitted and a received wave on which frequency modulation is imposed, and determining a slag level and slag thickness from its frequency and amplitude and then determining the molten iron level. CONSTITUTION:A microwave generating circuit 3 receives a modulation signal from a modulation signal generating circuit 1 and radiates a frequency- modulated microwave to a measurement surface from an antenna 2, and its reflected wave is received by the circuit 3, which detects a beat signal whose frequency fb satisfies an equation by mixing the transmitted and received waves. Then, a range arithmetic circuit 5 calculates the distance R1 from the antenna 2 to a slag surface from the synchronism of the beat signal and a beat signal amplitude detecting circuit 6 and a slag layer thickness arithmetic circuit 7 calculates the slag layer thickness according to the amplitude of beat signal. A molten iron level arithmetic circuit 8 measures the molten iron level in the torpedo car from both calculated values with the simple constitution. In the equation, A and B are constants and C is light speed.
摘要翻译：目的：采用简单的结构，通过检测发射频率调制的接收波混合，并从其频率确定炉渣水平和炉渣厚度，来测量鱼雷铁水位，振幅，然后确定铁水位。构成：微波发生电路3从调制信号发生电路1接收调制信号，并将频率调制的微波从天线2发射到测量面，其反射波由电路3接收，电路3检测拍频信号其频率fb通过混合发送和接收的波而满足等式。然后，距离运算电路5根据节拍信号的同步和拍频信号振幅检测电路6计算从天线2到炉渣表面的距离R1，并且炉渣层厚度运算电路7根据拍频信号幅度。铁水平运算电路8以简单的结构从两个计算值测量鱼雷车中的铁水液位。在等式中，A和B是常数，C是光速。

7. 发明专利

JPH08166373A METHOD AND APPARATUS FOR DISCRIMINATING FLAW ON ROLL SURFACE 失效
公开(公告)号：JPH08166373A
公开(公告)日：1996-06-25
申请号：JP30928594
申请日：1994-12-13
申请人： NIPPON STEEL CORP , NIPPON FUERUSUTAA KK , NITTETSU ELEX CO LTD
发明人： ARAMAKI HIROMI , KUMAGAI TAKESHI , SENDA YOICHI , KAWAMURA KOJI , TSUTSUI KANEO
IPC分类号： G01N27/90 , G01N21/892
摘要： PURPOSE: To make it possible to detect the flaw on the surface of the roll of a roll group or an individual roll immediately after the occurrence of the flaw by counting the number of the detections where the flaw detecting interval is substantially equal to the roll length, and judging the occurrence of the roll flaw when the counted value reaches the preset number. CONSTITUTION: When the surface-flaw detection signal of a rolling material (coil) penetrating the inside of a sensor coil is inputted into a roll-flaw judging device 800 from an eddy-current flaw detector 500, the device 800 sets a roll-flaw judging program. Then, the counted value of the generated pulses of a pulse generator 1, that is, the moving amount of the coil in the flaw detector 500 during the period from the flaw detection at the previous time to the flaw detection at this time (one period of flaw detection) is written by an MPU 4. The number of times of the flaw detections, wherein the flaw detecting interval is substantially equal to the roll length corresponding to the roll group or the respective roll, is counted. When the number of times reaches the preset number of times, it is judged that the flaw has occurred in the roll group or the roll corresponding to the interval, and the fact is displayed on a display 7.

8. 发明专利

JPH01250712A METHOD FOR MEASURING TWIST ANGLE OF CABLE STRAND 失效
公开(公告)号：JPH01250712A
公开(公告)日：1989-10-05
申请号：JP7847588
申请日：1988-03-31
申请人： NIPPON STEEL CORP
发明人： HOJO TETSUO , EGUCHI TATSUYA , TATEISHI SHUICHI , KAWAMURA KOJI
IPC分类号： G01B21/22
摘要： PURPOSE:To measure the twist angle of a cable strand, on the basis of the sensor signal obtained by rotating the gap sensor, which is provided to a twisted cable in the axial direction thereof, in the circumferential direction of the cable, and the shift quantity of the cable strand in the circumferential direction from a quantity-of-rotation sensor. CONSTITUTION:When gap sensors 2A, 2B arranged outside a cable 1 having a long pitch in parallel to the axial direction thereof are rotated, an uneven gap waveform is obtained corresponding to the shape of the strand 3 of the surface of the cable 1 and the signal U corresponding to the quantity of rotation is obtained from a quantity-of-rotation sensor (not shown) and these data are used to calculate the shift quantity DELTAL of the same strand in the circumferential direction thereof from the quantity of the rotation at the peak point when the sensor 2A crosses the same strand and that of the peak point when the other sensor 2B crosses. Then, from the relation with the interval L between the sensors 2A, 2B, the twist angle of the strand 3 can be easily calculated.

9. 发明专利

JPS6318263A ULTRASONIC FLAW DETECTION FOR BOLT 失效
公开(公告)号：JPS6318263A
公开(公告)日：1988-01-26
申请号：JP16094586
申请日：1986-07-10
申请人： NIPPON STEEL CORP
发明人： NAKAYAMA MASAHISA , SAKATA YUTAKA , KAWAMURA KOJI , HANZAWA MITSUGI
IPC分类号： G01N29/04
摘要： PURPOSE:To detect a crack flaw generated in a bolt accurately by ultrasonic flaw detection, by using a longitudinal wave vertical probe having such a characteristic that an ultrasonic beam is focused eccentric from the center of the beam thereof. CONSTITUTION:A special ultrasonic probe 1 is made up of a vibrator 4 formed in a curved surface and a delay material 5 made of acrylic resin. When a crack flaw 7 generated at the thread bottom of a bolt 2 is irradiated with a tilted ultrasonic beam 6, a sound pressure of the ultrasonic beam reflected from the crack flaw becomes much larger because of a shape characteristic of the crack flaw. The crack flaw generated at the screw bottom of the bolt generally covers from that occurs near the thread tip 3 to that occurs at a relatively distant point. The crack flaw generated at a desired point of the thread section can be detected by scanning the thread tip 3 with the probe 1. The inspection of the entire area of the thread bottom is possible by changing the direction of scanning with the probe 1 totally in the diametrical direction on the surface of the thread tip section 3.

10. 发明专利

JPS6046854B2 失效
公开(公告)号：JPS6046854B2
公开(公告)日：1985-10-18
申请号：JP12740777
申请日：1977-10-24
申请人： NIPPON STEEL CORP
发明人： WATANABE SEIICHI , KAWAMURA KOJI , ICHIJIMA ISAMU , MYAGAWA KAZUO
IPC分类号： H03H7/01 , H04L25/06

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