42results about How to "Accurate flaw detection" patented technology

The invention discloses a pipeline creeping robot. The pipeline creeping robot comprises a box body, a control mechanism, a detection mechanism, a fixing column, multiple obstacle crossing creeping mechanisms, an extending-and-contracting connecting rod device and two detection fixing support brackets. The detection mechanism is mounted on the front end of the box body. The two detection fixing support brackets are mounted on the two sides of the box body correspondingly. The control mechanism is mounted inside the box body. The fixing column is mounted on the back end of the box body. The multiple obstacle crossing creeping mechanisms are connected with the fixing column through the extending-and-contracting connecting rod device. The detection mechanism, the obstacle crossing creeping mechanisms and the detection fixing support brackets are electrically connected with the control mechanism. The pipeline creeping robot is applicable to the size variation of the pipeline; barriers in the pipeline can be crossed; obstacle crossing ability is great; the problem that barrier obstruction is conducted in the pipeline walking process is avoided.

The invention discloses an ultrasonic flaw detector for measuring a metal workpiece and belongs to the technical field of ultrasonic flaw detection. The ultrasonic flaw detector comprises a detection executing mechanism used for detecting a weld joint of a pipeline, a monitoring device correlated to the detection executing mechanism, a conveying mechanism used for moving the pipeline to the detection executing mechanism along axial direction, a lifting mechanism used for lifting the pipeline, a correcting component used for monitoring if the weld joint is upward and a remote controller. The workload of flaw detection is greatly relieved, the flaw detection is more accurate and the efficiency is higher.

The invention provides a drilling platform safety detection method and device and detection equipment. A radio frequency signal sent by ultrasonic transceiver equipment can be analyzed to obtain an ultrasonic spectrogram, then an amplitude curve is fitted, multiple groups of curve characteristics of the amplitude curve are determined, then characteristic recognition is carried out by combining operating characteristics corresponding to an operating data list of extraction equipment communicated with an oil and gas pipeline, and thus a flaw detection result of the oil and gas pipeline is generated. Therefore, flaw detection of the oil and gas pipeline can be realized on the ultrasonic level, and then slight damage in the oil and gas pipeline is recognized, so that even if no oil and gas leakage occurs in the oil and gas pipeline, accurate flaw detection can still be carried out on the oil and gas pipeline through the scheme.

The invention relates to a grinding device for an inner wall of a large shaft central hole of a power generator unit. The grinding device comprises a handheld device round bar, wherein a fixed retainer ring is fixedly installed on the right side end part of the round bar, the round bar at the left side of the fixed retainer ring is sleeved by a hard sponge sleeve, a layer of grinding abrasive paper is fixedly installed on the outer side of the circumference of the hard sponge sleeve, a fixed stop ring sleeves the round bar at the left side of the hard sponge sleeve, and the fixed stop ring is fixed by a clamping hoop at the outer side of the circumference of the fixed stop ring. The grinding abrasive paper elastically contacts with the inner wall of the central hole, the elastic contact is different from the rigid contact between the traditional mechanical grinding block and the inner wall of the central hole, the abrasive paper in different fineness degree can be replaced at any time, the grinding effect can be guaranteed, the grinding efficiency can be improved, and the good coupling of an ultrasonic probe is guaranteed, so that accuracy in ultrasonic flaw detection can be realized, and leak detection can be avoided.

The invention provides a wheel-set flaw detection driving device which comprises two driving parts and a driving motor. Each driving part comprises a support part, a support plate, a rotating wheel mounting base, a driving wheel and a driven wheel; each rotating wheel mounting base comprises a first bottom plate, a first flank and a second flank, wherein the first flank and the second flank each comprises a first through hole used for installing the corresponding driving wheel, a first slot hole used for installing the corresponding driven wheel and a groove used for clamping a wheel shaft, each support part is installed at the bottom of the corresponding support plate, and the driving motor is connected with a central shaft of each driving wheel. According to the wheel-set flaw detection driving device, by means of the support parts, treads of support wheel sets get away from the ground, the driving motor drives the driving wheels to rotate and drive the wheel shafts of the wheel sets to rotate, abrasion caused by contact between the treads of the wheel sets and the ground is reduced, stable rotation of the wheel sets can be guaranteed, and therefore the flaw detection device can conduct accurate flaw detection on the wheel sets.

A curved-surface rotation axis superposed rotation electromagnet comprises a main rotation electromagnet, wherein the main rotation electromagnet comprises a yoke, coils, a main shaft, a cover plate and an universal ball, a bearing is fixedly arranged in the center of the yoke, the main shaft is arranged on the bearing, one end of the main shaft penetrates through a bottom end of the yoke and is provided with an engagement bayonet, the other end of the main shaft extends to a central round hole of the cover plate, a main shaft curved-surface sliding groove is formed in the main shaft at a lower side of the cover plate, a cover plate curved-surface sliding groove is formed in one side, near to the yoke, of the cover plate, the cover plate curved-surface sliding groove and the main shaft curved-surface sliding groove are matched to form a limitation groove, the universal ball is arranged in the limitation groove, and the main shaft curved-shaft sliding groove is an irregularly-shaped curved-shaft sliding groove of which the curvature of a curved surface is gradually changed. By the curved-surface rotation axis superposed rotation electromagnet, a large torque is provided, and flaw detection and check can be accurately performed on a steel material in a high-temperature temperature; and after the electromagnets in two different working directions are combined, the detection mechanism is automatically opened and closed by circuit control.

The invention discloses a flaw detection device with a thickness measuring function of an inner hole of a heat conduction tube of a nuclear power evaporator. A first concave tabletop and a second concave tabletop are formed in the side surface of a column to form a base body; five through holes, namely two through holes I, two through holes II and a through hole III, are formed in the two concave tabletops in parallel; the axes of the two through holes I are intersected with each other on one side of the first concave tabletop and are both intersected with the axis of the base body; a plane in which the axes of the two through holes I are located is perpendicular to the first concave tabletop; the axes of the two through holes II are positioned on two sides of the axis of the base body and are in one same plane; the plane in which the axes of the two through holes II are located is perpendicular to the first concave tabletop; the axis of the through hole III and the axes of the through holes I are positioned in one same plane; the axis of the through hole III is perpendicular to the axis of the base body. The device can be used for detecting the inner hole in the axial direction, the circumferential direction and the thickness simultaneously, the problems that some flaw is neglected and cracks cannot be detected are avoided, the accuracy and the working efficiency of flaw detection are improved, and the flaw detection is reliable.

The invention relates to a method for manual simulation of fatigue cracks of a reference block of a bolt. The bolt is processed with a central rotating circle or circular arc cutter, and an arc fatigue crack section which is same as a fatigue section is processed. By means of the method for manual simulation of the fatigue cracks of the reference block of the bolt, a natural crack reflection surface at a bolt fracture can be really and effectively simulated, crack detection of the bolt is more accurate, and the method has the advantages of being simple, accurate and easy to process and the like.

The invention provides a wheel-set flaw detection driving device which comprises two driving parts and a driving motor. Each driving part comprises a support part, a support plate, a rotating wheel mounting base, a driving wheel and a driven wheel; each rotating wheel mounting base comprises a first bottom plate, a first flank and a second flank, wherein the first flank and the second flank each comprises a first through hole used for installing the corresponding driving wheel, a first slot hole used for installing the corresponding driven wheel and a groove used for clamping a wheel shaft, each support part is installed at the bottom of the corresponding support plate, and the driving motor is connected with a central shaft of each driving wheel. According to the wheel-set flaw detection driving device, by means of the support parts, treads of support wheel sets get away from the ground, the driving motor drives the driving wheels to rotate and drive the wheel shafts of the wheel sets to rotate, abrasion caused by contact between the treads of the wheel sets and the ground is reduced, stable rotation of the wheel sets can be guaranteed, and therefore the flaw detection device can conduct accurate flaw detection on the wheel sets.

The present invention discloses a device for calibrating the electric center of the eddy current coil, which works on the normal calibration sample tube during the use of the original through-type eddy current, and a very critical step in this work is to measure the electric center and the electric center of the coil Check the coincidence adjustment of the steel tube mechanical center. The device changes the original two-step method of first finding the coil mechanical center and then the coil electrical center into the present one-step method of directly finding the coil electrical center through a method of utilizing electromagnetic induction. From the original mechanical adjustment to the measurement of electromagnetic induction. Moreover, because of the adoption of digital display technology, the final result is digitized, which is beneficial to future statistics, reduces labor intensity, and improves labor efficiency.

An ice-breaking and snow-melting cleaning robot for a medium and low speed maglev, comprising a rack (11), folding bending mechanisms, an ice-melting and cleaning mechanism, and an autonomous cruise module (7). The rack (11) spans between two F rails of a low and medium speed maglev to be detected. There are two groups of folding bending mechanisms, which are disposed at two ends of the rack (11) respectively and are located above the F rails. Each group of folding bending mechanisms is provided with a walking wheel pair (5) and a detent wheel pair (2). The snow-melting and cleaning mechanism comprises a fixing frame (15), an F rail obstacle-removal and cleaning unit (14), and an ice-melting heating unit (16). The fixing frame (15) is mounted on the rack (11), located above the folding bending mechanisms, and deployed along the extension direction of the F rails. The F rail obstacle-removal and cleaning unit (14) and the ice-melting heating unit (16) are disposed at two ends of the fixing frame (15) respectively. The autonomous cruise module (7) is mounted below the rack (11). The cleaning robot can melt and clean ice and snow on the F rails, and is simple in structure and convenient to operate.

The invention provides a drilling platform safety detection method and detection equipment, which can analyze a radio frequency signal sent by ultrasonic transceiving equipment to obtain an ultrasonicspectrogram so as to fit an amplitude curve and determine multiple groups of curve characteristics of the amplitude curve. And then characteristic recognition is carried out in combination with the operation characteristics corresponding to the operation data list of extraction equipment communicated with an oil and gas pipeline, so that a flaw detection result of the oil and gas pipeline is generated. Thus, the flaw detection of the oil and gas pipeline can be achieved on the ultrasonic level, then slight damage in the oil and gas pipeline is recognized, and even if oil and gas leakage doesnot occur to the oil and gas pipeline, accurate flaw detection can still be conducted on the oil and gas pipeline through the scheme.

The invention relates to the technical field of ultrasonic flaw detection, in particular to a hollow axle ultrasonic flaw detector, which includes a flaw detection assembly, a docking platform and a feeding device. The flaw detection assembly is in butt joint with a hollow axle through the docking platform, and is driven by the feeding device to enter the hollow axle to perform detection. The hollow axle ultrasonic flaw detector no longer uses a line type balancer while installing the flaw detection assembly to the axle, but uses the docking platform to bear the flaw detection assembly, thus alleviating the labor force needed for left-right movement and up-down movement of the flaw detection assembly. In addition, an ultrasonic probe adjusts the gap between the outer surface of the ultrasonic probe and the inner surface of the hollow axle through a self-adaptive adjustment device, so that the gap between the ultrasonic probe surface and the hollow axle inner surface can always keep consistent during high-speed rotating flaw detection by the universal probe, thus preventing a supplied turbine oil membrane on the ultrasonic probe surface from thickening, and ensuring accurate time and locations for ultrasonic wave emission and ultrasonic wave receiving during ultrasonic probe detection.