The invention provides a method for detecting a weld seam of a thin-wall small diameter tube by adopting a phased array ultrasonic combination technology. The method for detecting the weld seam of the thin-wall small diameter tube with the wall thickness of more than or equal to 3.5mm and smaller than or equal to 7mm by adopting the phased array ultrasonic combination technology is characterized in that the setting of a test block passing a phased array ultrasonic system is subjected to field detection by adopting phased array ultrasonic equipment through a phased array probe; the detection result is obtained by the flow of evaluating and issuing a detecting report. The method disclosed by the invention has the advantages of simplicity and practicality in operation, no radiation, no pollution, high detection efficiency, high quantitative precision, small influence from human factors and low possibilities of missing evaluation and misjudgment; the detection result is displayed in a three-dimensional image form, so the visibility and the understandability are realized. The method is suitably applied for detecting the weld seam of the thin-wall small diameter tube.

Method for detecting weld seam of thin-wall small diameter tube by adopting phased array ultrasonic combination technology

An automatic phased array ultrasonic detection method of welding seams on main pipelines in a nuclear power plant belongs to the field of nondestructive testing and includes the steps of: 1) selecting an area array probe and a wedge according to the material of the welding seam on the main pipeline, and ensuring that the surface status satisfies detection demand; 2) forming a clear marker that is required in the detection on the surface of the welding seam on the main pipeline; 3) assembling the probe and the wedge with a solid flexible coupling medium to form a coupled fixture; 4) fixing the coupled fixture onto a scanning detection apparatus by a probe support; 5) respectively setting related parameters of a phased array ultrasonic detector and an automatic scanning detection controller, and detecting the welding seam on the main pipeline; and 6) quantifying defects according to a B scanning detection image of a detection result. The method avoids the influence on the defect detection due to artificial factor and inconsistent coupling in a manual ultrasonic detection process in the prior art, improves defect detection rate and defect quantification precision, can perform continuous automatic scanning detection to the welding seam on a main pipeline of which the perimeter exceeds 2 m, is improved in detection efficiency significantly and has important engineering application value.

Automatic phased array ultrasonic detection method of welding seams on main pipelines in nuclear power plant

The invention relates to phased array ultrasonic detection in the field of nondestructive detection, and concretely relates to a method for setting the reference sensitivity and angle gain compensation of phased array sector scanning. The method comprises the following steps: connecting a phased array ultrasonic device with a phased array probe, selecting fan-shaped scanning software in the device, dividing a weld into a plurality of subareas along a thickness direction through weld simulation software, determining a sector scanning angle range and the wave detection time number adopted by every subarea, and comparing artificial reflectors, corresponding to all the subareas, on a test block in order to set the reference sensitivity and angle gain compensation. The method has the advantages of novel and unique property, simplicity in operation, practicability, no radiation, no pollution and high detection efficiency; and a detection result is recorded by encoder, and is displayed in an image form, so the result is visual and understandable, the quantification precision is high, and the misjudgement probability is reduced. The method is suitable for being applied to the setting of the reference sensitivity and angle gain compensation in the phased array sector scanning detection of a welded joint.

Method for setting reference sensitivity and angle gain compensation of phased array sector scanning

Disclosed is an intermediate and large diameter thin-walled tube non-destructive detection method based on a phased array ultrasonic flaw detector. The method comprises: selecting a corresponding wedge block and probe according to the specification and thickness of a detected workpiece, and fixing the wedge block to a front end of the probe, the probe being connected to an encoder; determining a focusing law according to a used scanning type, and specifying an involved probe parameter and focusing law parameter; according to the focusing law parameter, using simulation software in a detection device for demonstration, adjusting the distance between the front end of the probe and an edge of a welding seam, so that a selected detection acoustic beam covers the whole detection area, and determining the position of a reference line; according to the distance, set in the focusing law, between the probe and the welding seam, using a ruler for measurement, fixing a magnetic stripe to a measurement position, and the probe connected to the encoder travelling along an edge of the magnetic stripe to perform welding seam detection; and saving detection data, analyzing and processing the detection data to obtain a detection result, and marking a defect position and a defect type of a welding seam which does not meet standards.

Intermediate and large diameter thin-walled tube non-destructive detection method based on phased array ultrasonic flaw detector

The invention discloses a friction stirring welding phased array detection device and method of an aluminum alloy hollow sectional material. The detection device comprises phased array equipment, a water immersion type phased array probe, a connection cable, a water pump and a water pipe, wherein the phased array equipment is connected with the water immersion type phased array probe through the connection cable; the water immersion type phased array probe is connected with the water pump through the water pipe; the water immersion type phased array probe is arranged on a workpiece to be detected and is used for carrying out welding line defect detection; and the water pump is used for supplying coupling water for the water immersion type phased array probe. The detection method comprises the following step of carrying out conduction of ultrasonic waves in the workpiece to be detected by adopting a water coupling method, so that the coupling water of the probe does not need to come into contact with the workpiece and accurate and efficient welding line defect detection is realized. The friction stirring welding phased array detection device and method of the aluminum alloy hollow sectional material have the beneficial effects that the coupling effect can be improved, clutters are effectively reduced and a scanning speed is rapid; the welding quality of a welding line can be effectively guaranteed after detection; and the friction stirring welding phased array detection device and method are safe, reliable and practical and are particularly suitable for the thin-plate aluminum alloy hollow sectional material.

Friction stirring welding phased array detection device and method of aluminum alloy hollow sectional material

The invention provides a small-diameter tube nondestructive testing method based on a phased array ultrasonic flaw detector. The small-diameter tube nondestructive testing method comprises the following steps: carrying out CIVA and sound field simulation on a detected workpiece; debugging the phased array ultrasonic flaw detector by a simulation test block and verifying on a simulated workpiece; grinding two sides of a welding seam of the detected workpiece, detecting the detected workpiece ground smoothly by the debugged phased array ultrasonic flaw detector; and analyzing the detection graph to obtain a detection result. The method can perform CIVA and sound field simulation on the detected workpiece before field detection, and adopts an appropriate comparison test block and the simulation workpiece for debugging the phased array ultrasonic flaw detector; the method adopts different scanning modes according to the different thicknesses of the simulation workpieces in a debugging process, can improve the debugging precision, can improve the field detection sensitivity, can prevent repeated detection, saves the detection time and reduces the detection cost.

Small-diameter tube nondestructive testing method based on phased array ultrasonic flaw detector

The utility model belongs to the technical field of industry X -ray radiographic inspection, concretely relates to be used for boiler water wall welding seam X -ray machine operation support of detecting a flaw. This operation support includes to comprise fixing device, adjusting screw, support frame and balancing pole. Fixing device be equipped with the couple at this structure top for fixing ofsupport, adjusting screw connect fixing device and support frame for the opening degree of control film, the support frame adopt the triangle -shaped structure for place the X -ray production apparatus, the balancing pole connect on the support frame for overall structure's stability. According to the technical solution provided by the utility model, the utility model discloses can be at whole boiler water wall industry X -ray radiographic inspection in -process, reduce the transport number of times of X -ray production apparatus, control radiograph formation of image opening degree improves work efficiency and operating mass with rated load.

Be used for boiler water wall welding seam X -ray machine operation support of detecting a flaw

The utility model relates to a nondestructive test field, concretely relates to a sweep and look into recorder for large -caliber pipe welding seam phased array ultrasonic testing, press from both sides and position sensor including magnetic wheel, support, probe, the support comprises support mobile jib and rotation axis, and position sensor comprises cable conductor, gyro wheel and transcriber, sweeps to look into recorder and be connected through between cable conductor and the phased array ultrasonic testing appearance. The utility model discloses a cable conductor and phased array ultrasonic testing appearance are connected, and signal transmission is stable, sweep and look into the recorder support and pop one's head in to press from both sides and adopt titanium alloy material to make, increase life, magnetic wheel makes for magnetic material, adsorbs on the pipe convenient operation, position sensor adopts solitary gyro wheel, and it is more accurate that positional information takes notes, the probe presss from both sides and the support passes through elasticity screwed connection, can finely tune the probe, guarantees the coupling effect on probe and pipe surface. More enough satisfy the needs of witnessed inspections.

A sweep and look into recorder for large -caliber pipe welding seam phased array ultrasonic testing

The invention specifically relates to a novel orientated gamma-source trace-radiation flaw detector, belonging to the field of radiation flaw detection machinery. The novel orientated gamma-source trace-radiation flaw detector comprises a main detector body, a conduit and a driving motor which are successively connected, wherein the main detector body is composed of an exposure box, a handle and a storage tank; a source conveying sleeve, a source pushing rod and a gamma source are arranged in the storage tank; the main detector body is connected with the conduit via a conduit connection valve; and the conduit is composed of a conduit shell and a pushing-assisting rod. According to the invention, the storage tank is made of lead, so the storage tank can absorb rays and prevent radiation; the source conveying sleeve and the source pushing rod are connected via a slide rail, so friction is reduced, and operation is facilitated; the conduit is connected with the main detector body, so operation is convenient; the conduit shell is made of rubber, which allows the service life of the detector to be prolonged; the pushing-assisting rod in the conduit is made of soft metal and a slide rail is arranged, so wearing is reduced and the service life of the detector is prolonged; the exposure box is employed for ray detection so as to prevent dropping of the gamma source; and detection is completed via the driving motor remotely controlled by detection personnel, so radiation harm to the detection personnel is effectively reduced.

Novel orientated gamma-source trace-radiation flaw detector

The invention relates to technical field of non-destructive testing, in particular to a fully-focused detection technology used for coarse-grained material weld joints and based on an M2M phased arrayultrasonic flaw detector. The fully-focused detection technology includes: using the M2M phased array ultrasonic flaw detector as the detection instrument to form a rectangular scanning area on a to-be-detected workpiece, and allowing the scanning area to cover the weld joints and heat affected zone of the to-be-detected workpiece; using M2M instrument detection software to divide the weld jointsand heat affected zone of the to-be-detected workpiece into countless points, focusing each point, and collecting scanning data; using a scanning rack to detect the to-be-detected workpiece, collecting full-weld-joint scanning data, and performing quality evaluation according to related to standards. The detection technology has the advantages that the to-be-detected areas are divided into countless points by using a two-dimensional linear probe, focused detection is performed on each point, the detection sensitivity of the areas can be effectively increased, and effective detection of coarse-grained materials can be achieved; the M2M phased array ultrasonic flaw detector is used to perform optimal algorithm processing on the data, data quantity is reduced, and storage and on-site detection and analysis are facilitated.

Zhu Qi

Papers

Small-diameter tube nondestructive testing method based on phased array ultrasonic flaw detector

Be used for boiler water wall welding seam X -ray machine operation support of detecting a flaw

A sweep and look into recorder for large -caliber pipe welding seam phased array ultrasonic testing

Novel orientated gamma-source trace-radiation flaw detector

Fully-focused detection method used for coarse-grained materials and based on phased array ultrasonic flaw detector