37results about How to "Improve the effect of flaw detection" patented technology

The invention discloses a method for performing rotary feed straightening on metal pipes. The method comprises the step of realizing feed straightening on the metal pipes by means of straightening rollers arranged in pairs in the process that the metal pipes move forwards in the axial direction, and is characterized in that the metal pipes rotate while moving forwards, and thus, the metal pipes spirally move forwards, and the metal pipes are straightened in the process that the metal pipes spirally move forwards. According to the method disclosed by the invention, the metal pipes can be straightened when being fed before flaw detection so as to improve the flaw detection effect, and the method has the advantages of being simple to implement and having a good straightening effect.

The invention discloses a data display and storage method for steel rail flaw detection operation. A control unit conducts detection, takes a rising edge or a falling edge of a trigger pulse as an initial point, controls a data acquisition unit to acquire ultrasonic drive signals and ultrasonic echo signals located in an effective gate, outputs the signals to a first input first output (FIFO) memory, simultaneously controls a mileage counting unit to read encoder counted mileage corresponding to the initial point, and then outputs fixed-format data formed by combining the encoder counted mileage and the signals acquired by the data acquisition unit to the FIFO memory. A control unit extracts and compresses data cached in the FIFO memory in a segmented mode, and uploads the data into a real-time controller memory. A real-time controller transmits the data in the memory to an upper computer in real time, the data are processed through the upper computer, A-type display data are sent to an A-type display unit to be displayed, and meanwhile, the A-type display data are sent to a storage unit to be stored. By adoption of the data display and storage method for steel rail flaw detection operation, the technical problems that multiple channels for an existing steel rail flaw detection operation data display and storage mode exist, the data size is large, and the A display data fail to be stored can be solved.

The invention discloses an automatic aligning control method with wearing compensation. The method comprises the following steps of S10), acquiring inside contour data of a steel rail, and actual position of a detecting wheel; S20), calculating a rail head wearing amount of a steel rail according to inside contour data of the steel rail, calculating a wearing compensation amount through the wearing amount, and compensating an aligning reference value according to the wearing compensation amount; and S30), performing PID controlling according to the compensated aligning reference value and theactual position of the detecting wheel, and outputting an aligning control value. The automatic aligning control method can settle a technical problem of severe frequency loss on the steel rail with severe rail head wearing on the condition of normal aligning device control offset.

A feeding structure for steel pipe flaw detection is disclosed. The structure includes a steel pipe transmission device for driving a steel pipe to move along the axial direction and a steel pipe feeding straightening device arranged at the feeding end of the steel pipe transmission device. The structure is characterized in that the steel pipe feeding straightening device comprises straightening rollers arranged in pairs; the circumferential surfaces of the straightening rollers have an arc shape with a concave middle; and two straightening rollers in each pair of the straightening rollers arearranged at two sides at the left-right direction of a steel pipe movement path, with axes of the two straightening rollers being staggered and inclined along the steel pipe movement direction, so that the two straightening rollers are respectively in contact with the steel pipe surface in a symmetrical spiral line manner. The feeding structure can achieve straightening during feeding before steel pipe flaw detection to improve flaw detection effects and has a simple structure and good straightening effects.

The invention provides a warship hull descaling and flow detecting system which comprises a power supply system, a control system, a charging system, an energy storing system, a plasma shock wave generating mechanism, a flaw detection monitoring system, a surface flushing mechanism and an adsorbing and walking robot. When the system runs, probes of the plasma shock wave generating mechanism, the surface flushing mechanism, the adsorbing and walking robot and the flaw detection monitoring system are in underwater operation. Organisms attached to the surface of a warship hull are subjected to primary cleaning by the aid of strong sound shock waves generated from discharging of underwater plasmas, the organisms attached to the surface of the warship hull fall off or are loosened, and then the loosened attachments are cleaned by the aid of the surface flushing mechanism. The descaling effect can be detected through the flaw detecting system after descaling operation, and non-destructive detection can be performed on the surface of the warship hull.

The invention provides a method for improving the core quality and the flaw detection eligibility rate of a super-thick steel plate, and belongs to the technical field of ferrous metallurgy. The method improves the core quality and the flaw detection eligibility rate of the super-thick steel plate (greater than or equal to 80mm) based on an inter-pass on-line instant cooling system, and the methodcomprises the following specific process steps that when a continuous casting billet (greater than or equal to 200mm) is not subjected to converter steelmaking or enters into a longitudinal rolling stage after the converter steelmaking is completed, one or more passes of on-line cooling is carried out in a rolling gap by using an instant cooling system near a rolling mill, an initial surface temperature is 850-1000 DEG C, the continuous casting billet enters a cooling zone at a speed of 2-6m / s, the roll speed in the cooling zone is 1-3m / s, the water supply and drainage ratio is (1:2)-(1:6), the total flow of a single group of headers is 200-400m<3> / h, after cooling is performed, the return temperature is controlled at 750-900 DEG C for rolling, and the reduction rate after cooling is greater than 12%. The method for improving the core quality and the flaw detection eligibility rate of the super-thick steel plate enables a core part of the thick plate to be increased through temperature difference rolling, the core quality and the flaw detection eligibility rate are significantly improved, and the yield is further increased.

The invention discloses an automatic centering control device with wear compensation. The automatic centering control device with wear compensation comprises a centering sensor, a wear compensation calculating unit and a PID control unit, wherein the centering sensor is used for obtaining rail outline data of the internal side of a steel rail and an actual position of a wheel detector; the wear compensation calculating unit is used for calculating a railhead wear amount of the steel rail according to the rail outline data of the internal side of the steel rail, calculating the wear compensation amount by using the wear amount and compensating a centering reference value in at least three gears according to the wear compensation amount; and the PID control unit is used for performing PID control according to the compensated centering reference value output by the wear compensation calculating unit and the actual position of the wheel detector and outputting a centering control value. According to the automatic centering control device with wear compensation, the technical problem that the frequency is still seriously lost on the steel rail with serious railhead wear in the case of normal control error of a centering device can be solved.

The invention discloses a steel pipe flaw detection feeding part structure, comprising a steel pipe transmission device for driving the steel pipe to move along the axis direction and a steel pipe feeding straightening device arranged at the feeding end of the steel pipe transmission device; The straightening device includes straightening rollers arranged in pairs. The circumferential surface of the straightening rollers is a concave arc in the middle. Two straightening rollers in each pair of straightening rollers are arranged on the left and right sides of the steel pipe movement path, and two The axis lines of the straightening rollers are dislocated and tilted up and down along the moving direction of the steel pipe, so that the two straightening rollers form two symmetrical helical contact with the surface of the steel pipe respectively. The invention can realize the straightening of the steel pipe during flaw detection and improve the flaw detection effect, and has the advantages of simple structure and good straightening effect.

The invention provides a method for ultrasonic flaw detection of a welding line of a steel structure. The method comprises the steps that (1) a flaw detection coupling agent A which comprises, by weight, 40 to 55 parts of ethylene glycol, 25 to 35 parts of glycerin, 10 to 15 parts of epoxy resin, 1 to 3 parts of versamid with molecular weight of 200 to 300, 0.5 to 2 parts of trimethylolpropane and50 to 65 parts of water is prepared; (2) a flaw detection coupling agent B which comprises, by weight, 25 to 30 parts of xanthan gum, 0.5 to 2 parts of sodium alginate and 40 to 60 parts of water isprepared; (3) a layer of flaw detection coupling agent A is sprayed on the surface of the welding line of the steel structural member, wherein the spraying thickness is 1 to 2mm; standing for 60 to 90s is carried out to acquire the steel structural member containing a precoated layer; and (4) the surface of the welding line of the steel structural member containing the precoated layer is sprayed with a layer of flaw detection coupling agent B, wherein the spraying thickness is 1 to 3 mm; a welding line ultrasonic flaw detector is used to carry out ultrasonic flaw detection on the surface of the welding line of the steel structural member; the position information of the flaw of the welding line is recorded in real time. The method for ultrasonic flaw detection of the welding line of the steel structure, which is provided by the invention, can effectively optimize flaw detection at a contact surface with low flatness and in low temperature environment.

The invention discloses a pipeline ray flaw detection device and a flaw detection method. The pipeline ray flaw detection device comprises a ray flaw detector, a positioning ring and at least two fixing rings; multiple positioning rods are arranged on the positioning ring, the positioning rod and the positioning ring are movably connected to fix a welding line in the middle of the positioning ring; an annular sliding rail is arranged in the positioning ring, a sliding block is arranged on the annular sliding rail, the sliding block is fixedly connected with the ray flaw detector through a telescopic lever; the fixing rings are located at two sides of the positioning ring and connected with the positioning ring through a connecting rod mechanism; and fixing modules for fixing the fixing rings on the pipeline are arranged on the fixing rings. In the process of ensuring the flow detection process of the bend, the detector and the welding line are maintained at the fixed angle and distance, and the flaw detection effect is improved.

The invention discloses a progressive feeding fine straightening method for a metal pipe, which includes the step of realizing the straightening of the metal pipe by means of paired straightening rollers when the metal pipe advances in the axial direction. Multiple pairs of straightening rollers are arranged horizontally so that the pressing and straightening force of each pair of straightening rollers is adjusted to increase sequentially along the moving direction of the metal pipe to achieve straightening. The invention can realize the progressive straightening of the metal pipe during flaw detection and improve the flaw detection effect, and has the advantages of simple implementation and good straightening effect.

The invention discloses a helical line contact feeding straightening method for a metal pipe, which includes the step of realizing the straightening of the metal pipe by means of paired straightening rollers when the metal pipe advances in the axial direction, and is characterized in that The circumferential surface of the straightening rollers is set in a concave arc shape, so that each of the straightening rollers forms two symmetrical helical contact with the surface of the metal pipe to achieve straightening. The invention can realize the straightening of the metal pipe during flaw detection and improve the flaw detection effect, and has the advantages of simple implementation and good straightening effect.

The invention discloses an ultrasonic probe for a wheel hub. The ultrasonic probe comprises a probe shell and a piezoelectric wafer, wherein the piezoelectric wafer is arranged at the end part of theprobe shell; the ultrasonic probe further comprises an elastically deformable sound beam convergent lens; the sound beam convergent lens is detachably located on the outer side of the piezoelectric wafer and arranged at the end part of the probe shell. The ultrasonic probe for the wheel hub is a detachable portable focused ultrasonic probe; the sound beam convergent lens can be fitted to the curved surface of a tread to improve the ultrasonic flaw detection capacity of the tread; the sound beam convergent lens detachably detects flaws on inner and outer rim surfaces, so that various types of multiple probes are not required to be carried; furthermore, the ultrasonic probe is simple in structure and low in manufacturing cost.

The invention discloses a magnetic powder inspection fluorescence imaging device for detecting a small special-shaped part. The magnetic powder inspection fluorescence imaging device comprises an integrated camera assembly, and the integrated camera assembly comprises a camera, a lens arranged in front of the camera, a fluorescence filter arranged in front of an electric lens and a light source assembly arranged on a shell of the integrated camera assembly. The light source assembly comprises a lens through hole formed in the center of the shell and a plurality of LED light sources arranged around the lens through hole, and the plurality of LED light sources includes a plurality of ultraviolet LEDs and a plurality of visible light LEDs. The magnetic powder inspection fluorescence imaging device for detecting the small steel special-shaped part further comprises an external high-power ultraviolet light source, and the ultraviolet light is transmitted to the integrated camera assembly through an optical fiber. The integrated device provided by the invention can realize the safe and efficient magnetic powder inspection fluorescence imaging device detection. By utilizing a small LED light source or the miniaturization of a large light source optical fiber, the inconsistency of the observation positions of the ultraviolet illumination light source and the camera during detection isavoided, a detection blind area is avoided, and the magnetic powder inspection detection effect is improved.

The invention discloses a design method for improving the magnetic powder inspection capacity through the simultaneous excitation at a plurality of frequencies. Magnet yoke coils are simultaneously excited by using excitation currents with a plurality of different frequencies based on the principle that induced magnetic fields generated by the excitation currents with the different frequencies have different magnetization deeps for an inspected workpiece, so that the inspected workpiece is comprehensively and uniformly magnetized, defective leakage magnetic fields on the surface and the inner part of the inspected workpiece are favorably escaped, magnetic powder is easy to gather, and therefore, the defect checkout capacity of the magnetic powder is greatly improved.

The invention discloses a method for performing rotary feed straightening on metal pipes. The method comprises the step of realizing feed straightening on the metal pipes by means of straightening rollers arranged in pairs in the process that the metal pipes move forwards in the axial direction, and is characterized in that the metal pipes rotate while moving forwards, and thus, the metal pipes spirally move forwards, and the metal pipes are straightened in the process that the metal pipes spirally move forwards. According to the method disclosed by the invention, the metal pipes can be straightened when being fed before flaw detection so as to improve the flaw detection effect, and the method has the advantages of being simple to implement and having a good straightening effect.

The invention discloses a movable magnetic powder inspection device which comprises an inspection box, an electric control box, castors and a display. The lower end of the inspection box is open, the electric control box is positioned behind the inspection box and higher than the same, the castors are mounted at the lower end of the inspection box, and the display is mounted on the upper portion of the electric control box. A support is arranged in the inspection box, a magnetizing component and a photographic scanning component are arranged on the support, the magnetizing component comprises a closed circuit iron core and a magnetizing coil winded on the closed circuit iron core, the photographic scanning component comprises an industrial camera and an illuminating lamp for assisting the industrial camera in shooting, a processor and a storage are arranged in the electric control box and connected with the industrial camera, the processor is connected with the storage, and a handle is arranged on the upper portion of the electric control box. Inspection efficiency is effectively improved, inspection precision is also improved, labor cost is reduced, and the movable magnetic powder inspection device has humanized design.

The invention discloses underwater non-destructive flaw detection equipment and a processing method based on the combination of vision and magnetic powder, which uses the combination of magnetic powder and vision to perform flaw detection operations facing underwater pipelines. The underwater non-destructive flaw detection equipment includes: underwater non-destructive flaw detection devices and underwater Underwater movable platform, the underwater non-destructive flaw detection device is fixed on the underwater movable platform; the underwater nondestructive flaw detection device mainly includes: flaw detector control module, camera module, communication module and image processing module, the underwater movable platform mainly includes motion control module. The invention adopts the motion control module to realize the positioning and movement of the underwater movable platform; adopts the flaw detector control module to realize the spraying of the magnetic suspension liquid; adopts the camera module to collect the image information before and after the absorption pipeline of the underwater magnetic particle flaw detector; adopts the communication module to upload Location information and image information; by extracting and fusing high-level semantic information from magnetic particle inspection data and visual image data, autonomous inspection and non-destructive inspection of underwater pipelines are realized.