Pipe and bar defect detection device and detection method

Abstract

The invention discloses a pipe and bar defect detection device and method, and belongs to the technical field of quality detection equipment. The pipe and bar defect detection device comprises a shell and an annular ultrasonic probe, and the shell is provided with a detection channel; the annular ultrasonic probe comprises a plurality of detection units, the plurality of detection units are connected with the shell, the plurality of detection units are arranged around the axial direction of the detection channel, and the detection units are configured to generate ultrasonic waves under the excitation of the pulse voltage and detect the tube and the bar penetrating through the detection channel, so that the structure of the tube and bar defect detection device is simplified, and the detection efficiency is improved. And the reliability of the tube and bar defect detection device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of quality inspection equipment, and in particular to a tube and bar defect inspection device and inspection method. Background Art

[0002] Tubes and bars are tubes or bars. As basic materials in important fields such as aerospace, nuclear industry, chemical industry, and machinery manufacturing, they are widely used and have high technical requirements. For important industrial fields, tubes and bars generally need to undergo non-destructive testing before use to ensure that the tubes and bars are used safely.

[0003] In the related art, the inspection equipment for small-diameter tubes and bars generally needs to be equipped with a high-speed rotating mechanism to drive the probe to rotate at high speed to achieve comprehensive inspection of the tubes and bars. The structure of the inspection equipment is relatively complex and the reliability is low. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a tube and bar material defect detection device, which is conducive to simplifying the structure of the tube and bar material defect detection device and improving the reliability of the tube and bar material defect detection device.

[0005] The invention also provides a detection method.

[0006] According to the first aspect of the present invention, a tube and rod defect detection device includes: a shell having a detection channel; an annular ultrasonic probe including a plurality of detection units, the plurality of detection units are connected to the shell, the plurality of detection units are arranged around the axial direction of the detection channel, and the detection units are configured to generate ultrasonic waves when excited by a pulse voltage and detect the tube and rod passing through the detection channel.

[0007] The tube and bar defect detection device according to the embodiment of the present invention has at least the following beneficial effects: the annular ultrasonic probe includes a plurality of detection units, the plurality of detection units are connected to the shell, the shell can provide support for the annular ultrasonic probe, the shell has a detection channel, the detection channel can be provided for the tube and bar to be detected, the plurality of detection units are arranged around the axial direction of the detection channel, that is, the plurality of detection units can be provided around the tube and bar to be detected, the detection units are configured to generate ultrasonic waves when excited by pulse voltage, the ultrasonic waves can enter the tube and bar from multiple directions through the coupling agent for non-destructive detection, the annular ultrasonic probe receives the echo signal reflected by the tube and bar, and cooperates with the imaging device of the external device to realize imaging, so as to detect the defects on the outer surface, inner surface and inside of the tube and bar, so that the tube and bar or the probe does not need to be rotated during detection, which is conducive to simplifying the structure of the tube and bar defect detection device, and improving the reliability and durability of the tube and bar defect detection device, the tube and bar defect detection device controls the rotation of ultrasonic waves by electronic scanning, and the electronic rotation speed is greater than the mechanical rotation speed, which can effectively improve the detection efficiency.

[0008] According to some embodiments of the present invention, the annular ultrasonic probe includes a circular array transducer assembly, the circular array transducer assembly includes a plurality of detection units, and the plurality of detection units are arranged in a circular ring shape, and the detection direction of the detection unit is parallel to the radial direction of the detection channel.

[0009] Specifically, the annular ultrasonic probe includes a circular array transducer assembly, which includes a plurality of detection units, and the plurality of detection units are arranged in a circular ring shape so that the detection direction of the detection unit is parallel to the radial direction of the detection channel. When the pipe or rod to be detected is inserted into the detection channel, the ultrasonic waves emitted by the detection units of the circular array transducer assembly can be incident along the normal of the pipe-rod interface, which is beneficial to reducing the attenuation of ultrasonic energy and detecting longitudinal defects on the inner and outer surfaces of the pipe or rod, as well as internal axial defects of the pipe or rod, so that the pipe or rod or the probe does not need to be rotated during detection, which is beneficial to simplifying the structure of the pipe-rod defect detection device and improving the reliability and durability of the pipe-rod defect detection device.

[0010] According to some embodiments of the present invention, the annular ultrasonic probe includes a conical array transducer assembly, the conical array transducer assembly includes a plurality of detection units, and the plurality of detection units are arranged in a conical shape, and the detection direction of the detection unit is arranged at an angle to the axial direction of the detection channel.

[0011] Specifically, the annular ultrasonic probe includes a conical array transducer assembly, which includes a plurality of detection units, and the plurality of detection units are arranged in a conical shape, so that the detection direction of the detection unit is arranged at an angle with the axial direction of the detection channel. When the tube or rod to be detected is inserted into the detection channel, the inner surface of the detection unit is inclined with the axial direction of the tube or rod, and the ultrasonic waves emitted by the detection units of the conical array transducer assembly are arranged at an angle with the axial direction of the detection channel, so that the ultrasonic waves are incident on the tube or rod to generate transverse waves, and the transverse defects on the inner and outer surfaces of the tube or rod, as well as the internal circumferential defects of the tube or rod, are detected, so that the tube or rod or the probe does not need to be rotated during detection, which is conducive to simplifying the structure of the tube or rod defect detection device and improving the reliability and durability of the tube or rod defect detection device.

[0012] According to some embodiments of the present invention, the detection channel includes a first detection section and a second detection section arranged along the axial direction, the second detection section is connected to the first detection section, the inner diameter of the second detection section gradually increases in a direction away from the first detection section, the circular array transducer assembly is arranged around the first detection section, and the conical array transducer assembly is arranged around the second detection section.

[0013] Specifically, the detection channel includes a first detection section and a second detection section arranged along the axial direction, the first detection section and the second detection section are connected to each other, and the inner diameter of the second detection section gradually increases in the direction away from the first detection section, that is, the second detection section can be trumpet-shaped, and the pipe and rod can be inserted into the detection channel from the end of the second detection section away from the first detection section, so as to facilitate the insertion and alignment of the pipe and rod, the circular array transducer assembly is arranged around the first detection section, that is, the arrangement of multiple detection units in the circular array transducer assembly is adapted to the shape of the first detection section, so as to detect longitudinal defects on the inner and outer surfaces of the pipe and rod, and internal axial defects of the pipe and rod, and the conical array transducer assembly is arranged around the second detection section, that is, the arrangement of multiple detection units in the conical array transducer assembly is adapted to the shape of the second detection section, so as to detect transverse defects on the inner and outer surfaces of the pipe and rod, and internal circumferential defects of the pipe and rod.

[0014] According to some embodiments of the present invention, the shell is provided with a first accommodating groove and a second accommodating groove arranged along the axial direction of the detection channel, the first accommodating groove and the second accommodating groove are both connected to the detection channel, and the circular array transducer assembly and the conical array transducer assembly are respectively arranged in the first accommodating groove and the second accommodating groove.

[0015] Specifically, the shell is provided with a first accommodating groove and a second accommodating groove arranged along the axial direction of the detection channel, and the first accommodating groove and the second accommodating groove are both connected to the detection channel. The first accommodating groove can be used to accommodate the circular array transducer assembly, so that the circular array transducer assembly is embedded in the shell, and can detect the tube and rod materials passing through the detection channel, so as to detect the longitudinal defects on the inner and outer surfaces of the tube and rod materials, as well as the internal axial defects of the tube and rod materials. The second accommodating groove can be used to accommodate the conical array transducer assembly, so that the conical array transducer assembly is embedded in the shell, and can detect the tube and rod materials passing through the detection channel, so as to detect the transverse defects on the inner and outer surfaces of the tube and rod materials, as well as the internal circumferential defects of the tube and rod materials.

[0016] According to some embodiments of the present invention, the detection unit includes a matching layer, a piezoelectric chip and a backing arranged from the inside to the outside, the two ends of the backing are respectively connected to one end of the piezoelectric chip and the shell, one end of the matching layer is connected to the other end of the piezoelectric chip, and the other end of the matching layer is set toward the axis of the detection channel.

[0017] The detection unit includes a matching layer, a piezoelectric chip and a backing arranged from the inside to the outside. The piezoelectric chip has a piezoelectric effect and can realize the conversion between electrical energy and mechanical energy. The two ends of the backing are respectively connected to one end of the piezoelectric chip and the shell, that is, the backing is clamped between the piezoelectric chip and the shell. The backing is mainly used to absorb the acoustic energy radiated by the piezoelectric chip due to vibration to improve the accuracy of detection. One end of the matching layer is connected to the piezoelectric chip, and the other end of the matching layer is arranged toward the axis of the detection channel to achieve the matching of the acoustic characteristic impedance between the piezoelectric chip and the sound transmission medium to improve the accuracy of defect detection of pipes and rods.

[0018] According to some embodiments of the present invention, the piezoelectric wafer is a single crystal wafer, a dual crystal wafer, a linear array wafer, or a planar array wafer.

[0019] Specifically, the piezoelectric chip is a single crystal chip, a dual crystal chip, a linear array chip or a planar array chip, thereby improving the applicability of the tube and rod defect detection device to different scenarios. When selecting and using, the user can choose different styles of piezoelectric chips according to specific needs and performance requirements.

[0020] According to some embodiments of the present invention, the tube and rod defect detection device further includes a flaw detector connected to the annular ultrasonic probe, and the flaw detector is configured to form an image based on an echo signal of the annular ultrasonic probe.

[0021] Specifically, the tube and rod defect detection device also includes a flaw detector connected to the annular ultrasonic probe. The flaw detector can apply a pulse voltage to the annular ultrasonic probe so that the annular ultrasonic probe generates ultrasonic waves and detects the tube and rod. The annular ultrasonic probe receives the echo signal reflected by the tube and rod and transmits the echo signal to the flaw detector. The flaw detector can form an image based on the obtained echo signal to assist the user in detecting or judging the shape, size, position, orientation, distribution, contents and other information of the tube and rod.

[0022] According to some embodiments of the present invention, the housing has a clamping hole, and the clamping hole is used to fix the housing.

[0023] The shell has a clamping hole, which can be connected to the supporting base of the external device to achieve a fixed connection between the shell and the supporting base to adapt to scanning and detection in different application scenarios.

[0024] According to the second aspect of the present invention, the detection method includes the tube and bar defect detection device shown in the first aspect; the detection method includes:

[0025] Immerse the tube rod and the shell in the coupling agent, and insert the tube rod into the detection channel;

[0026] Applying pulse voltage to the annular ultrasonic probe makes the annular ultrasonic probe generate ultrasonic waves, and the ultrasonic waves enter the tube and rod through the coupling agent for detection;

[0027] Control the axial movement of the tube rod along the detection channel;

[0028] The echo signal reflected by the tube and bar received by the annular ultrasonic probe is acquired, and imaging is performed based on the echo signal to obtain the defect information of the tube and bar.

[0029] According to the detection method of the embodiment of the present invention, at least the following beneficial effects are achieved: when in use, the user can immerse the tube and the shell to be detected into the coupling agent together, and pass the tube and the rod into the detection channel, so that the coupling agent is filled between the annular ultrasonic probe and the tube and the rod; a plurality of detection units are arranged around the axial direction of the detection channel, that is, the plurality of detection units can be arranged around the tube and the rod to be detected; a pulse voltage is applied to the annular ultrasonic probe, so that the annular ultrasonic probe generates ultrasonic waves, and the ultrasonic waves pass through the coupling agent into the tube and the rod for detection, and the tube and the rod are controlled to move along the axial direction of the detection channel, so as to perform defect detection on the entire tube and the rod; the annular ultrasonic probe receives the echo signal reflected by the tube and the rod, and cooperates with the imaging device of the external device to realize imaging, so as to detect defects on the outer surface, inner surface and inside of the tube and the rod, so that the tube and the rod or the probe does not need to be rotated during detection, which is conducive to simplifying the structure of the tube and the rod defect detection device, and improving the reliability and durability of the tube and the rod defect detection device; the detection method controls the rotation of ultrasonic waves by electronic scanning, and the electronic rotation speed is greater than the mechanical rotation speed, which can effectively improve the detection efficiency.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0032] Figure 1 It is a schematic structural diagram of a tube and bar defect detection device according to an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the lateral structure of a tube and bar defect detection device according to an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the forward structure of a tube and bar defect detection device according to an embodiment of the present invention;

[0035] Figure 4 for Figure 2 AA cross-sectional view of the tube and bar defect detection device shown in;

[0036] Figure 5 for Figure 4 A partial enlarged view of position B of the tube and bar defect detection device shown in FIG.

[0037] Figure 6 It is a schematic structural diagram of a circular array transducer assembly of a tube and bar defect detection device according to an embodiment of the present invention;

[0038] Figure 7 It is a structural schematic diagram of another perspective of a circular array transducer assembly of a tube and bar defect detection device according to an embodiment of the present invention;

[0039] Figure 8 It is a structural schematic diagram of a conical array transducer assembly of a tube and bar defect detection device according to an embodiment of the present invention;

[0040] Fig. 9 It is a structural schematic diagram of another perspective of a conical array transducer assembly of a tube and bar defect detection device according to an embodiment of the present invention;

[0041] Fig.10 It is a schematic diagram of the structure of a piezoelectric chip of a tube and bar defect detection device in various styles according to an embodiment of the present invention;

[0042] Fig.11 The present invention is a flowchart of a detection method according to an embodiment of the present invention.

[0043] Figure Number:

[0044] 100, housing; 110, detection channel; 111, first detection section; 112, second detection section; 120, first accommodating groove; 130, second accommodating groove; 140, clamping hole;

[0045] 200, annular ultrasonic probe; 210, circular array transducer assembly; 220, conical array transducer assembly; 230, detection unit; 231, matching layer; 232, piezoelectric wafer; 233, backing;

[0046] 300. Flaw detector;

[0047] 410, cable; 420, sheath; 430, connector;

[0048] 500. Tubes and bars. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0052] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0053] The tube and rod 500 is a tube or a rod. The tube is widely used in boilers, geological drilling, petrochemicals, shipbuilding, pharmaceuticals, power generation, nuclear waste, hydraulic and pneumatic cylinders, fluid transportation, aerospace, industry, medicine, agriculture and other fields.

[0054] The reliability of pipe quality directly affects its safe lifespan. Defects such as cracks and bubbles inside thin walls, internal defects in butt welds, internal cracks after a period of use, and rust and thinning of pipe walls all need to be detected in advance to eliminate hidden dangers in a timely manner.

[0055] As a kind of processed parent material, rods are widely used in various industries, such as electric towers and poles in the power grid field, bearings and gears in the machinery manufacturing field, and axles and crankshafts in the automotive field. According to the needs of different fields, the shape, size and properties of rods are also different, so the process and quality requirements for rods are very strict.

[0056] The tube and bar defect detection device provided in the embodiment of the present invention can realize defect detection of the tube and bar 500, and the detection is relatively comprehensive. There is no need to set a rotating mechanism to drive the tube and bar 500 or the probe to rotate, which can effectively simplify the structure of the tube and bar defect detection device and improve the reliability of the tube and bar defect detection device.

[0057] Reference Figures 1 to 10 As shown, a tube and bar defect detection device according to an embodiment of the present invention includes a housing 100 and an annular ultrasonic probe 200 .

[0058] Reference Figure 1 , Figure 2 and Figure 4As shown, the four corners of the housing 100 are respectively provided with clamping holes 140, which can be connected to the supporting base of the external device to achieve a fixed connection between the supporting base of the external device and the housing 100, so as to adapt to the scanning and inspection of different application scenarios. The clamping holes 140 can also be used for external clamping encoders to scan and insert the pipe rod 500.

[0059] Reference Figure 1 , Figure 2 and Figure 3 As shown, a detection channel 110 is provided in the middle of the housing 100, and the detection channel 110 can be provided for the pipe and rod 500 to pass through. The annular ultrasonic probe 200 includes a plurality of detection units 230, and the plurality of detection units 230 are all connected to the housing 100, and the housing 100 can provide support for the annular ultrasonic probe 200. The plurality of detection units 230 are arranged axially around the detection channel 110, that is, the plurality of detection units 230 can be arranged around the pipe and rod 500 to be detected.

[0060] Reference Figure 1 , Figure 2 and Figure 4 As shown, the detection unit 230 is configured to generate ultrasonic waves when stimulated by a pulse voltage. The ultrasonic waves can enter the tube and rod 500 from multiple directions through the coupling agent for non-destructive testing. The annular ultrasonic probe 200 receives the echo signal reflected by the tube and rod 500 and cooperates with the external imaging device to realize imaging to detect defects on the outer surface, inner surface and inside of the tube and rod 500, so that the tube and rod 500 or the probe does not need to be rotated during testing, which is conducive to simplifying the structure of the tube and rod defect detection device and improving the reliability and durability of the tube and rod defect detection device. The tube and rod defect detection device controls the rotation of ultrasonic waves by electronic scanning, and the electronic rotation speed is greater than the mechanical rotation speed, which can effectively improve the detection efficiency.

[0061] Reference Figure 1 , Figure 2 and Figure 4 As shown, in the related art, the detection equipment for the tube and rod 500 generally needs to design a high-speed rotating mechanism to drive the probe or the tube and rod 500 to rotate at high speed, which has high requirements for mechanical design. At the same time, high precision requirements are placed on the coaxiality of the rotating shaft, the concentricity of the parent material, etc. The equipment has a large accumulated error due to long-term rotation wear, and the equipment needs to be calibrated and maintained regularly, which is costly and has low detection efficiency.

[0062] Reference Figure 1 , Figure 2 and Figure 4As shown, the tube and rod defect detection device provided by the embodiment of the present invention eliminates the traditional rotating mechanism through the cooperation of multiple detection units 230 and the detection channel 110, which is beneficial to simplify the structure of the tube and rod defect detection device, improve the reliability and durability of the tube and rod defect detection device, and help reduce the manufacturing cost and maintenance cost of the tube and rod defect detection device.

[0063] Reference Figure 4 , Figure 5 and Figure 6 As shown, it can be understood that the annular ultrasonic probe 200 includes a circular array transducer assembly 210, the circular array transducer assembly 210 includes a plurality of detection units 230, and the plurality of detection units 230 are arranged in a circular ring shape, and the detection direction of the detection unit 230 is parallel to the radial direction of the detection channel 110.

[0064] Reference Figure 4 , Figure 5 and Figure 7 As shown, when the pipe or rod 500 to be inspected is inserted into the inspection channel 110, the inner surface of the inspection unit 230 is arranged parallel to the axial direction of the pipe or rod 500, and the ultrasonic wave emitted by the inspection unit 230 of the circular array transducer assembly 210 can be incident along the normal line of the interface of the pipe or rod 500, which is beneficial to reducing the attenuation of ultrasonic wave energy and detecting the longitudinal defects on the inner and outer surfaces of the pipe or rod 500 and the internal axial defects of the pipe or rod 500, so that the pipe or rod 500 or the probe does not need to be rotated during the inspection, which is beneficial to simplifying the structure of the pipe or rod defect detection device and improving the reliability and durability of the pipe or rod defect detection device.

[0065] Reference Figure 4 , Figure 5 and Figure 8 As shown, it can be understood that the annular ultrasonic probe 200 includes a conical array transducer assembly 220, and the conical array transducer assembly 220 includes a plurality of detection units 230, and the plurality of detection units 230 are arranged in a conical shape, and the detection direction of the detection unit 230 is arranged at an angle to the axial direction of the detection channel 110.

[0066] Reference Figure 4 , Figure 5 and Fig. 9As shown, when the pipe or rod 500 to be inspected is inserted into the inspection channel 110, the inner surface of the inspection unit 230 is inclined to the axial direction of the pipe or rod 500, and the ultrasonic wave emitted by the inspection unit 230 of the conical array transducer assembly 220 is arranged at an angle to the axis of the pipe or rod 500, so that the ultrasonic wave is incident on the pipe or rod 500 to generate a transverse wave, and the transverse defects on the inner and outer surfaces of the pipe or rod 500 and the internal circumferential defects of the pipe or rod 500 are detected, so that the pipe or rod 500 or the probe does not need to be rotated during inspection, which is beneficial to simplifying the structure of the pipe or rod defect detection device and improving the reliability and durability of the pipe or rod defect detection device.

[0067] Reference Figure 1 , Figure 4 and Figure 5 As shown, when the tube and rod 500 directly passes through the detection channel 110, it will pass through the circular array transducer assembly 210 and the conical array transducer assembly 220, so as to complete the all-round detection of the transverse defects on the inner and outer surfaces, the longitudinal defects on the inner and outer surfaces, and the internal axial and axial defects of the tube and rod 500, which can be completed at one time, and the detection is more efficient and comprehensive.

[0068] Reference Figure 1 , Figure 4 and Figure 5 As shown, it can be understood that the detection channel 110 includes a first detection section 111 and a second detection section 112 arranged along the axial direction, the second detection section 112 is connected to the first detection section 111, and the inner diameter of the second detection section 112 gradually increases in the direction away from the first detection section 111, the circular array transducer assembly 210 is arranged around the first detection section 111, and the conical array transducer assembly 220 is arranged around the second detection section 112.

[0069] Reference Figure 1 , Figure 4 and Figure 5 As shown, the inner diameter of the second detection section 112 gradually increases in the direction away from the first detection section 111, that is, the second detection section 112 may be trumpet-shaped, and the pipe and rod material 500 may pass through the detection channel 110 from the end of the second detection section 112 away from the first detection section 111, so as to facilitate the penetration and alignment of the pipe and rod material 500.

[0070] Reference Figure 1 , Figure 4 and Figure 5 As shown, specifically, the second detection section 112 is in a truncated cone shape, and the multiple detection units 230 of the cone array transducer assembly 220 are arranged in a circumferential shape of a truncated cone. When the pipe or rod 500 to be detected is inserted into the detection channel 110, the inner surface of the detection unit 230 is inclined to the axial direction of the pipe or rod 500 to detect transverse defects on the inner and outer surfaces of the pipe or rod 500, as well as internal circumferential defects of the pipe or rod 500.

[0071] Reference Figure 1 , Figure 4 and Figure 5 As shown, it can be understood that the shell 100 is provided with a first accommodating groove 120 and a second accommodating groove 130 arranged axially along the detection channel 110, the first accommodating groove 120 and the second accommodating groove 130 are both connected to the detection channel 110, and the circular array transducer assembly 210 and the conical array transducer assembly 220 are respectively arranged in the first accommodating groove 120 and the second accommodating groove 130.

[0072] Reference Figure 1 , Figure 4 and Figure 5 As shown, the first accommodating groove 120 can be used to accommodate the circular array transducer assembly 210, so that the circular array transducer assembly 210 is embedded in the shell 100, and can detect the tube and rod 500 passing through the detection channel 110, so as to detect the longitudinal defects on the inner and outer surfaces of the tube and rod 500, and the internal axial defects of the tube and rod 500. The second accommodating groove 130 can be used to accommodate the conical array transducer assembly 220, so that the conical array transducer assembly 220 is embedded in the shell 100, and can detect the tube and rod 500 passing through the detection channel 110, so as to detect the transverse defects on the inner and outer surfaces of the tube and rod 500, and the internal circumferential defects of the tube and rod 500.

[0073] Reference Figure 1 , Figure 4 and Figure 5 As shown, specifically, the first accommodating groove 120 is located at the first detection section 111, and the second accommodating groove 130 is located at the second detection section 112. Specifically, the first accommodating groove 120 and the second accommodating groove 130 are annular grooves arranged axially at intervals along the detection channel 110. When the circular array transducer assembly is accommodated in the first accommodating groove 120, the inner surface of the circular array transducer assembly 210 is flush with the inner surface of the first detection section 111. When the conical array transducer assembly is accommodated in the second accommodating groove 130, the inner surface of the conical array transducer assembly 220 is flush with the inner surface of the second detection section 112, so as to reduce the risk of damage to the circular array transducer assembly 210 or the conical array transducer assembly 220 caused by the tube and rod material 500 during the transfer process.

[0074] Reference Figure 1 , Figure 4 and Figure 5 As shown, it can be understood that the detection unit 230 includes a matching layer 231, a piezoelectric chip 232 and a backing 233 arranged from the inside to the outside, and both ends of the backing 233 are respectively connected to one end of the piezoelectric chip 232 and the shell 100, one end of the matching layer 231 is connected to the other end of the piezoelectric chip 232, and the other end of the matching layer 231 is set toward the axis of the detection channel 110.

[0075] Reference Figure 1 , Figure 4 and Figure 5 As shown, the piezoelectric chip 232 has a piezoelectric effect and can realize the conversion between electrical energy and mechanical energy. When the piezoelectric chip 232 is affected by an external electric field, the piezoelectric chip 232 will deform, thereby generating ultrasonic waves; conversely, when the piezoelectric chip 232 is affected by ultrasonic waves, the piezoelectric chip 232 will generate electric charges, thereby converting mechanical energy into electrical energy to obtain an echo signal.

[0076] Reference Figure 1 , Figure 4 and Figure 5 As shown, the two ends of the backing 233 are respectively connected to one end of the piezoelectric chip 232 and the housing 100, that is, the backing 233 is sandwiched between the piezoelectric chip 232 and the housing 100. The backing 233 is mainly used to absorb the sound energy radiated by the piezoelectric chip 232 due to vibration, thereby reducing the interference caused by useless sound waves if they are reflected back and then transmitted to the piezoelectric chip 232, which is beneficial to improving the performance of the detection unit 230. The backing 233 is a material with high acoustic impedance and sound absorption performance, which can greatly absorb the sound signal and attenuate it to a minimum.

[0077] Reference Figure 1 , Figure 4 and Figure 5 As shown, one end of the matching layer 231 is connected to the piezoelectric chip 232, and the other end of the matching layer 231 is arranged toward the axis of the detection channel 110, so as to achieve the matching of the acoustic characteristic impedance between the piezoelectric chip 232 and the sound-transmitting medium, so as to improve the accuracy of defect detection of the tube and rod material 500.

[0078] Reference Figure 1 , Figure 4 and Figure 5 As shown, specifically, the tube and rod defect detection device can use water as a coupling agent for detecting the tube and rod 500. The acoustic performance parameters such as acoustic impedance, sound velocity, and sound attenuation of the matching layer 231 are close to those of water, and can effectively couple and conduct ultrasonic waves.

[0079] Reference Figure 1 , Figure 4 and Figure 5 As shown, the matching layer 231 can be formed by potting at the end surface of the piezoelectric chip 232. The tube and bar defect detection device can first connect the matching layer 231, the piezoelectric chip 232 and the backing 233 as a whole, and then embed the detection unit 230 into the first accommodating groove 120 or the second accommodating groove 130.

[0080] Reference Figure 1 , Figure 5 and Fig.10As shown, it can be understood that, specifically, the piezoelectric chip 232 is a planar array chip, and this chip structure can easily read more information, including measuring area, shape, size and position, etc. Planar array chips are widely used in the fields of ultrasonic imaging, medical imaging and non-destructive testing, and can provide more detailed and accurate images and data.

[0081] Reference Figure 1 , Figure 5 and Fig.10 As shown, it should be understood that in some other embodiments, the piezoelectric chip 232 is a single crystal chip, a dual crystal chip or a linear array chip, so as to improve the applicability of the tube and rod defect detection device to different scenarios. When selecting and using, the user can choose different styles of piezoelectric chips 232 according to specific needs and performance requirements.

[0082] Reference Figure 1 , Figure 2 and Figure 3 As shown, it can be understood that, in this embodiment, specifically, the tube and rod defect detection device also includes a flaw detector 300 connected to the annular ultrasonic probe 200. The flaw detector 300 can apply a pulse voltage to the annular ultrasonic probe 200 so that the annular ultrasonic probe 200 generates ultrasonic waves and detects the tube and rod 500. The annular ultrasonic probe 200 receives the echo signal reflected by the tube and rod 500 and transmits it to the flaw detector 300. The flaw detector 300 can form an image based on the obtained echo signal to assist the user in detecting or judging the shape, size, position, orientation, distribution, contents and other information of the tube and rod 500.

[0083] Reference Figure 1 , Figure 2 and Figure 3 As shown, it is understandable that the tube and bar defect detection device also includes a PCB (Printed Circuit Board) component, a cable 410, a sheath 420 and a connector 430. The multiple detection units 230 can be connected to the cable 410 through the circuit board leads, and connected and conducted through the cable 410 and the connector 430. The sheath 420 is sleeved on the outside of the cable 410 and is located at the junction of the housing 100 and the cable 410 to protect the cable 410 and reduce the risk of the cable 410 being wound and broken.

[0084] Reference Figure 1 , Figure 2 and Figure 3 As shown, specifically, the cable 410 may be a multi-core coaxial cable shielded wire, which is assembled with the connector 430 housing 100 through a multi-channel plug lead. The connector 430 may be used to connect to an external device, such as a flaw detector 300.

[0085] Reference Figure 1 , Figure 2 and Figure 3 As shown, specifically, the material of the housing 100 and the sheath 420 connector of the cable 410 is required to be not easily rusted and corroded in harsh environments, and the general indicator is a salt spray test of more than 48 hours. The material can be stainless steel 304, stainless steel 316, copper plated with nickel, etc.

[0086] Reference Figure 1 , Figure 2 and Figure 3 As shown, it can be understood that, specifically, the parameters of the circular array transducer assembly 210 are as follows:

[0087] The number of main axis array elements of the circular array transducer assembly 210: 64;

[0088] The center distance between adjacent array elements of the circular array transducer assembly 210 along the main axis is 1.2 mm.

[0089] The secondary axis width of the circular array transducer assembly 210 is 3 mm.

[0090] Reference Figure 1 , Figure 2 and Figure 3 As shown, it can be understood that, specifically, the parameters of the conical array transducer assembly 220 are as follows:

[0091] The number of main axis array elements of the conical array transducer assembly 220: 64;

[0092] The center distance between adjacent array elements of the conical array transducer assembly 220 is 1.2 mm.

[0093] The secondary axis width of the element of the conical array transducer assembly 220 is 3 mm.

[0094] Reference Figure 1 , Figure 2 and Figure 3 As shown, it can be understood that the shell can be stainless steel, and the specific model is: SUS316; the outer skin of the cable 410 can be made of PU (Polyurethane) material; the length of the cable 410 is: 6m; the inner diameter of the detection channel 110 is 25.4mm.

[0095] Reference Figure 1 , Figure 2 and Fig.11 As shown, a detection method according to an embodiment of the present invention is applied to the tube and bar defect detection device shown in any of the above embodiments. The detection method comprises the following steps:

[0096] Step S100, immersing the tube-bar material 500 and the housing 100 in a coupling agent, and inserting the tube-bar material 500 into the detection channel 110;

[0097] Step S200, applying a pulse voltage to the annular ultrasonic probe 200, so that the annular ultrasonic probe 200 generates ultrasonic waves, and the ultrasonic waves enter the tube and rod 500 through the coupling agent for detection;

[0098] Step S300, controlling the tube and rod 500 to move axially along the detection channel 110;

[0099] Step S400 , acquiring the echo signal reflected by the tube or rod 500 and received by the annular ultrasonic probe 200 , imaging the echo signal, and obtaining defect information of the tube or rod 500 .

[0100] Reference Figure 1 , Figure 2 and Fig.11 As shown, when in use, the user can immerse the pipe and rod material 500 to be inspected and the housing 100 together in the coupling agent, and insert the pipe and rod material 500 into the detection channel 110, so that the coupling agent is filled between the annular ultrasonic probe 200 and the pipe and rod material 500, and the plurality of detection units 230 are arranged around the axial direction of the detection channel 110, that is, the plurality of detection units 230 can be arranged around the pipe and rod material 500 to be inspected, and a pulse voltage is applied to the annular ultrasonic probe 200, so that the annular ultrasonic probe 200 generates ultrasonic waves, and the ultrasonic waves enter the pipe and rod material 500 from multiple directions through the coupling agent for detection, and the pipe and rod material 500 is controlled to move along the axial direction of the detection channel 110. The detection channel 110 moves axially to perform ultrasonic detection on the entire pipe and rod 500. The annular ultrasonic probe 200 receives the echo signal reflected by the pipe and rod 500 and cooperates with the external imaging device to realize imaging to detect defects on the outer surface, inner surface and inside of the pipe and rod 500, so that the pipe and rod 500 or the probe does not need to be rotated during detection, which is beneficial to simplifying the structure of the pipe and rod defect detection device and improving the reliability and durability of the pipe and rod defect detection device. The detection method controls the rotation of the ultrasonic wave by electronic scanning, and the electronic rotation speed is greater than the mechanical rotation speed, which can effectively improve the detection efficiency.

[0101] Reference Figure 1 , Figure 2 and Fig.11 As shown, the detection method uses imaging to produce clear images and intuitively display defects, and can detect obvious surface and internal defects of the tube and rod 500, making the detection effect significant, easy to operate, simple and easy, highly practical, and highly efficient.

[0102] It should be noted that defect information includes: defect location, defect shape, size, position, orientation, distribution and inclusions, etc.

[0103] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A tube and bar defect detection device, characterized in that: include: A housing (100) having a detection channel (110); The annular ultrasonic probe (200) comprises a plurality of detection units (230), wherein the plurality of detection units (230) are connected to the housing (100), and the plurality of detection units (230) are arranged around the axial direction of the detection channel (110). The detection units (230) are configured to generate ultrasonic waves when excited by a pulse voltage, and detect a pipe or rod (500) passing through the detection channel (110).

2. The tube and bar defect detection device according to claim 1, characterized in that: The annular ultrasonic probe (200) comprises a circular array transducer assembly (210), the circular array transducer assembly (210) comprises a plurality of detection units (230), and the plurality of detection units (230) are arranged in a circular ring shape, and the detection direction of the detection unit (230) is parallel to the radial direction of the detection channel (110).

3. The tube and bar defect detection device according to claim 2, characterized in that: The annular ultrasonic probe (200) comprises a conical array transducer assembly (220), the conical array transducer assembly (220) comprises a plurality of detection units (230), and the plurality of detection units (230) are arranged in a conical shape, and the detection direction of the detection unit (230) is arranged at an angle to the axial direction of the detection channel (110).

4. The tube and bar defect detection device according to claim 3 is characterized in that: The detection channel (110) comprises a first detection section (111) and a second detection section (112) arranged along the axial direction, the second detection section (112) is connected to the first detection section (111), the inner diameter of the second detection section (112) gradually increases in a direction away from the first detection section (111), the circular array transducer assembly (210) is arranged around the first detection section (111), and the conical array transducer assembly (220) is arranged around the second detection section (112).

5. The tube and bar defect detection device according to claim 3, characterized in that: The housing (100) is provided with a first accommodating groove (120) and a second accommodating groove (130) arranged axially along the detection channel (110); the first accommodating groove (120) and the second accommodating groove (130) are both connected to the detection channel (110); the circular array transducer assembly (210) and the conical array transducer assembly (220) are respectively arranged in the first accommodating groove (120) and the second accommodating groove (130).

6. The tube and bar defect detection device according to claim 1, characterized in that: The detection unit (230) includes a matching layer (231), a piezoelectric chip (232) and a backing (233) arranged from the inside to the outside, two ends of the backing (233) are respectively connected to one end of the piezoelectric chip (232) and the shell (100), one end of the matching layer (231) is connected to the other end of the piezoelectric chip (232), and the other end of the matching layer (231) is arranged toward the axis of the detection channel (110).

7. The tube and bar defect detection device according to claim 6, characterized in that: The piezoelectric chip (232) is a single crystal chip, a double crystal chip, a linear array chip or a planar array chip.

8. The tube and bar defect detection device according to claim 1, characterized in that: It also includes a flaw detector (300) connected to the annular ultrasonic probe (200), and the flaw detector (300) is configured to form an image based on the echo signal of the annular ultrasonic probe (200).

9. The tube and bar defect detection device according to claim 1, characterized in that: The housing (100) has a clamping hole (140), and the clamping hole (140) is used to fix the housing (100).

10. A detection method, characterized in that: Applicable to the tube and bar defect detection device according to any one of claims 1 to 9; the detection method comprises: Immersing the tube rod (500) and the housing (100) in a coupling agent, and inserting the tube rod (500) into the detection channel (110); Applying a pulse voltage to the annular ultrasonic probe (200) so that the annular ultrasonic probe (200) generates ultrasonic waves, and the ultrasonic waves pass through the coupling agent and enter the tube and rod material (500) for detection; Controlling the axial movement of the tube and rod (500) along the detection channel (110); An echo signal reflected by the tube or rod (500) and received by the annular ultrasonic probe (200) is acquired, and imaging is performed based on the echo signal to obtain defect information of the tube or rod (500).

Images