-
公开(公告)号：US4158873A
公开(公告)日：1979-06-19
申请号：US829442
申请日：1977-08-31
IPC分类号： H01F13/00
CPC分类号： H01F13/006
摘要： Demagnetizing methods and apparatus are provided in which a pipe, tube, rod, bar or other elongated part to be demagnetized is moved through the coil assembly to which pulses of current are applied to produce magnetic field pulses of alternating polarity and of substantially constant durations and magnitudes with a substantially constant repetition rate, each current pulse being effective to produce by the end thereof a reversal of the magnetic field in all portions of the part positioned within the confines of the coil assembly and immediately adjacent thereto, the part being moved longitudinally through the coil assembly at a velocity sufficiently low as to effect demagnetization of all portions of the part. The duration of each current pulse is at least 50 milliseconds and most preferably on the order of 0.5 seconds and the velocity of movement is preferably less than two feet per second. The coil assembly includes two pairs of coils connected in series-aiding relation with the coils of each pair being spaced axially from each other and being adjacent the coil of the other pair. Bridge rectifier circuits are provided for energization with silicon controlled rectifiers and trigger circuits adjustable for accurate balance.
摘要翻译： 提供了退磁方法和装置，其中要去磁的管，管，棒或其它细长部件移动通过线圈组件，脉冲电流被施加到线圈组件以产生具有交替极性和基本恒定持续时间的磁场脉冲， 具有基本上恒定的重复率的幅度，每个电流脉冲有效地通过其端部产生位于线圈组件的限制范围内并紧邻线圈组件的部分的所有部分中的磁场的反转，该部分纵向移动通过 线圈组件的速度足够低，以实现部件的所有部分的退磁。 每个电流脉冲的持续时间为至少50毫秒，最优选约为0.5秒，移动速度优选小于每秒2英尺。 线圈组件包括两对线圈，它们与每对线圈的串联关系相互连接，彼此轴向间隔开并且与另一对的线圈相邻。 提供桥式整流电路用于通过可控硅整流器和触发电路进行通电，以实现精确的平衡。
-
2.发明授权Pipeline inspection device using ultrasonic apparatus for corrosion pit detection 失效管道检测装置采用超声波设备进行腐蚀坑检测
公开(公告)号：US4641529A
公开(公告)日：1987-02-10
申请号：US599481
申请日：1984-04-12
申请人： Donald E. Lorenzi , Helmut F. Wagerer , Lev Spevak
发明人： Donald E. Lorenzi , Helmut F. Wagerer , Lev Spevak
IPC分类号： G01N29/265 , G01N29/04
CPC分类号： G01N29/265
摘要： A pipeline inspection apparatus is disclosed for the detection of corrosion pit type defects, employing one or more ultrasonic transducers to produce a parallel beam for direction toward the pipe wall from inside a pipe, with a sufficiently large beam width to permit comparison of time displayed signal components in defect depth determination, with the signal propagating through a gaseous medium. An additional embodiment combines the same with photographic apparatus.
摘要翻译： 公开了一种用于检测腐蚀坑型缺陷的管道检查装置，采用一个或多个超声波换能器从管内产生用于朝向管壁方向的平行梁，具有足够大的波束宽度，以允许比较时间显示信号 缺陷深度确定中的成分，信号通过气体介质传播。 另外的实施例将其与摄影装置相结合。
-
3.发明授权
公开(公告)号：US4633620A
公开(公告)日：1987-01-06
申请号：US788080
申请日：1985-10-16
CPC分类号： G01N21/88 , B24B49/00 , B24D5/00 , Y10T409/3042 , Y10T409/30476 , Y10T409/3056
摘要： Methods and apparatus are disclosed for processing of steel billets or the like to remove surface defects. A material-removing device such as a grinding wheel is automatically controlled to initiate removal of material at points where defects have been detected and to continue removal of material as long as cracks or other defects continue to be detected. In certain disclosed embodiments, an inspection is performed using magnetic particle or other inspection equipment, the initial removal of material being controlled therefrom. Thereafter, material-removal is controlled from signals produced by a probe which is carried in the removal device or adjacent thereto. In other disclosed embodiments, a thin layer of material is removed to permit detection of defects by a probe, the material-removal being both initiated and continued under control of probe signals.
摘要翻译： 公开了用于处理钢坯等的方法和装置，以去除表面缺陷。 自动控制诸如砂轮的材料去除装置，以便在已经检测到缺陷的点处开始去除材料，并且只要继续检测到裂纹或其它缺陷，继续移除材料。 在某些公开的实施例中，使用磁性粒子或其他检查设备进行检查，初始去除材料被控制。 此后，通过由去除装置中携带的探针或与之相邻的探针产生的信号控制材料去除。 在其他公开的实施例中，移除薄层材料以允许通过探针检测缺陷，材料去除在启动和继续的探针信号控制下。
-
公开(公告)号：US4434427A
公开(公告)日：1984-02-28
申请号：US337117
申请日：1982-01-05
CPC分类号： G03B37/005
摘要： A device is disclosed which includes a camera pig and a tow pig having an articulated connection therebetween to permit movement through pipe bends. The tow pig includes a syphon device for projecting liquids upwardly and forwardly and also includes a compressor and a desiccant chamber for drying of gas which is injected into a camera space between cups of the camera pig. A flow path is provided through the camera pig which by-passes the camera space, for maintaining a passive environment therein.
摘要翻译： 公开了一种装置，其包括相机猪和牵引猪，其间具有铰接连接，以允许通过管弯曲运动。 牵引猪包括用于向上和向前突出液体的虹吸装置，并且还包括压缩机和用于干燥气体的干燥剂室，所述干燥剂室被注入相机猪的杯子之间的相机空间中。 通过照相机猪提供流路，其绕过相机空间，用于保持其中的被动环境。
-
5.发明授权
公开(公告)号：US4035721A
公开(公告)日：1977-07-12
申请号：US566420
申请日：1975-04-09
摘要： The invention relates to a system and method of testing small cylindrical parts wherein a part is journalled for free rotation about a substantially stationary axis with one side of the part being frictionally engaged with a magnetic tape moved longitudinally to rotate the part and to transfer a magnetic flux pattern at the surface of the part to the tape. Important features relate to the provision of engagement means for obtaining non-skid intimate contact between the tape and the part, to the application of a biasing field to the tape at the area of interengagement between the tape and the part and to the manner of supporting the part.
摘要翻译： 本发明涉及一种测试小圆柱形部件的系统和方法，其中一部分被轴颈安装成围绕基本上固定的轴线自由旋转，其中该部分的一侧与纵向移动的磁带摩擦接合以旋转该部件并传送磁性 磁带图案在零件的表面到磁带。 重要的特征涉及提供用于获得带和部件之间的非滑动紧密接触的接合装置，在带和部件之间的相互接合的区域处施加偏置场到带的位置以及支撑的方式 那个部分。
-
公开(公告)号：US4372658A
公开(公告)日：1983-02-08
申请号：US347541
申请日：1982-02-10
IPC分类号： G03B37/00
CPC分类号： G03B37/005
摘要： Pipeline inspection apparatus is provided including a camera unit and associated illumination means, preferably a strobe flash unit, for recording on photographic film the rectangular images corresponding to generally rectangular internal surface portions of a pipe for detection of defects, a viewing axis of the camera being normal to the axis of the pipe. Weight means are provided for operating in a manner such as to establish a viewing axis in predetermined angular relation to a vertical plane through the axis of a horizontal pipe. In one embodiment, the device is supported by resilient cups for movement through the pipe and the entire device is rotatable under the influence of the weight means. In another embodiment, at least the optical portion of the camera unit is rotatably supported and connected to the weight means. Magnetic flaw detection means are provided for triggering the camera unit.
摘要翻译： 提供管道检查装置，其包括相机单元和相关联的照明装置，优选地是闪光灯闪光单元，用于在照相胶片上记录对应于用于检测缺陷的管道的大致矩形内表面部分的矩形图像，照相机的观察轴 垂直于管道的轴线。 提供了重量装置，以便通过水平管的轴线以垂直平面建立与预定角度关系的观察轴的方式操作。 在一个实施例中，该装置由弹性杯支撑以便通过该管道移动，整个装置可在重量装置的影响下旋转。 在另一个实施例中，照相机单元的至少光学部分被可旋转地支撑并连接到重量装置。 提供用于触发相机单元的磁性探伤装置。
-
7.发明授权
公开(公告)号：US4363545A
公开(公告)日：1982-12-14
申请号：US247766
申请日：1981-03-26
CPC分类号： G03B37/005
摘要： This invention relates to apparatus for photographic inspection of the interior of a pipeline and more particularly to apparatus which includes an optical port wiper which makes it possible to obtain clear and accurate photographs under adverse environmental conditions. The apparatus is highly effective and reliable while being comparatively simple and readily and economically manufacturable.
摘要翻译： 本发明涉及一种用于管道内部的照相检查的装置，更具体地涉及一种包括光学端口擦拭器的设备，其使得可以在不利的环境条件下获得清晰和准确的照片。 该设备非常有效和可靠，同时相对简单，易于经济地制造。
-
8.发明授权Method and apparatus for establishing magnetization levels for magnetic particle testing or the like 失效用于建立磁性粒子测试等的磁化水平的方法和装置
公开(公告)号：US4290016A
公开(公告)日：1981-09-15
申请号：US974009
申请日：1978-12-28
申请人： Donald E. Lorenzi
发明人： Donald E. Lorenzi
CPC分类号： G01N27/84 , G01N27/9086 , G01R33/1215
摘要： A method and apparatus are provided which are based upon a discovery that regardless of the type of ferromagnetic material of a part and its shape, there is a certain direct, uniform and constant relationship between the level of magnetization required for satisfactory testing by the magnetic particle method and the response which is obtained from an eddy current instrument which has been properly calibrated and which is used under proper conditions. After removal of scale from a surface portion of a part and after demagnetization of the part, a probe of the eddy current instrument is simply placed against such surface portion and the part is magnetized at a level which produces a certain target eddy current indication. The instrument may be readily calibrated through the use of a test block which has a milled slot of a certain size. Preferably, the probe is of a crossed coil type permitting a rapid scanning operation with respect to a plurality of surface areas of a part of irregular shape.
摘要翻译： 提供了一种方法和装置，其基于一个发现，不管部件的铁磁材料的类型及其形状如何，磁性颗粒的令人满意的测试所需的磁化水平之间存在一定的直接，均匀和恒定的关系 方法和从已正确校准并在适当条件下使用的涡流仪器获得的响应。 在从部件的表面部分去除标尺并且在部件退磁之后，涡流仪器的探针被简单地放置在这种表面部分上，并且部件被磁化成产生一定的目标涡流指示的水平。 可以通过使用具有一定尺寸的铣槽的测试块来容易地校准该仪器。 优选地，探针是交叉线圈型，允许相对于不规则形状的一部分的多个表面区域进行快速扫描操作。
-
公开(公告)号：US4249810A
公开(公告)日：1981-02-10
申请号：US881148
申请日：1978-02-27
IPC分类号： G03B37/00
CPC分类号： G03B37/005
摘要： Pipeline inspection apparatus is provided including a camera unit and associated illumination means, preferably a strobe flash unit, for recording on photographic film the images of internal surface portions of a pipe for detection of defects. The camera unit is moved longitudinally within a pipeline by a drive unit which preferably includes electric motors energized from a self-contained battery unit. Important features relate to means for automatically reversing the drive of the apparatus after it has travelled a predetermined distance and to mechanical features for facilitating movement of the device through bends and the like.
摘要翻译： 提供了管道检查装置，其包括相机单元和相关联的照明装置，优选地是闪光灯闪光单元，用于在照相胶片上记录用于检测缺陷的管道的内表面部分的图像。 相机单元通过驱动单元在管线内纵向移动，驱动单元优选地包括从独立电池单元供电的电动机。 重要的特征涉及在装置行进了预定距离后自动翻转装置的装置以及用于促进装置通过弯曲等的移动的机械特征的装置。
-
10.发明授权Magnetic testing device for internal surfaces of pipe using a magnetizing means and expandable magnetizable material within the pipe 失效使用磁化装置和管内可膨胀的可磁化材料的管内表面的磁性测试装置
公开(公告)号：US4063157A
公开(公告)日：1977-12-13
申请号：US774919
申请日：1977-03-07
CPC分类号： G01N27/902 , G01N27/82 , G01R33/10
摘要： A magnetic testing device is provided in which a magnetic recording tape or paper is wrapped around the outside of a tubular pressure member of elastomeric material which is disposed between two circular end plates which form pole portions of a yoke having a central core extending between the end plates and having a coil wound thereon with a copper shield being disposed around the outside of the coil. The device is disposed in a pipe or the like and compressed air is supplied to inflate the pressure member and press the magnetic tape paper into intimate contact with the interior surface of the pipe while an AC current is supplied to the coil to apply a magnetic field to the pipe and to record a magnetic field pattern on the magnetic tape or paper.
摘要翻译： 提供磁性测试装置，其中磁性记录带或纸缠绕在弹性体材料的管状压力构件的外侧周围，弹性体材料的管状压力构件设置在两个圆形端板之间，该圆形端板形成轭的极部，该中心芯在端部 并且具有卷绕在其上的线圈，铜屏蔽围绕线圈的外侧设置。 该装置设置在管等中，并且供应压缩空气以使压力构件膨胀，并且当将一个AC电流提供给该线圈时将该磁带纸压紧到该管道的内表面上以紧密接触以施加磁场 并且将磁场图案记录在磁带或纸上。
-
-
-
-
-
-
-
-
-
搜索结果
12 条记录 (耗时 0.014 秒)
