Ultrasonic flaw detection equipment and method for weld joint of aluminum alloy welded pipe

Abstract

The invention relates to the technical field of ultrasonic flaw detection equipment, in particular to aluminum alloy welded pipe weld joint ultrasonic flaw detection equipment and a method thereof.The aluminum alloy welded pipe weld joint ultrasonic flaw detection equipment comprises a workbench and a flaw detection assembly; the flaw detection assembly comprises four first driving parts, a transmission part, a lifting part, a horizontal guide rail, four second driving parts, a connecting part and an ultrasonic probe; according to the ultrasonic flaw detection device, the aluminum alloy welded pipe is rotated, and the ultrasonic probe is driven to horizontally reciprocate on the surface of the aluminum alloy welded pipe, so that the ultrasonic probe can move on the surface of the aluminum alloy welded pipe in a zigzag annular path; the inclined plane defect is always approximately perpendicular to the acoustic beam at a certain swing angle, so that strong echoes are generated, the detection effect on the inclined plane defect of the welding seam of the aluminum alloy welded pipe can be improved, and the problem of missing detection is avoided.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic flaw detection equipment technology, and in particular to an ultrasonic flaw detection equipment and method for welded seams of aluminum alloy welded pipes. Background Technology

[0002] When using aluminum alloy pipes, multiple sections are often welded together for various applications. After welding, the weld joints need to be subjected to ultrasonic testing. Ultrasonic testing is a method that uses the characteristic that ultrasonic energy can penetrate deep into metal materials and reflect off the interface when it enters another section to check for defects in parts. When the ultrasonic beam passes from the surface of the part through the probe into the metal, it will generate reflected waves when it encounters defects and the bottom surface of the part, forming pulse waveforms on the fluorescent screen. The location and size of the defects are determined based on these pulse waveforms.

[0003] Currently, when performing ultrasonic testing on the weld seams of aluminum alloy welded pipes, the ultrasonic probe is placed close to the surface of the pipe while it is rotated to perform ultrasonic testing on the weld seams. However, because the position of the ultrasonic probe is fixed during testing, when facing inclined planar defects, such as cracks or incomplete weld fusion, the inclined planar defects cannot be nearly perpendicular to the ultrasonic beam, resulting in insufficient echo intensity and thus missed detections. Therefore, the detection effect on inclined planar defects in the weld seams of aluminum alloy welded pipes is insufficient. Summary of the Invention

[0004] The purpose of this invention is to provide an ultrasonic flaw detection device and method for aluminum alloy welded pipe welds, which can improve the detection effect of inclined planar defects in aluminum alloy welded pipe welds and avoid the problem of missed detection.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an ultrasonic flaw detection device for welded seams of aluminum alloy welded pipes, comprising a worktable and a flaw detection assembly, wherein the flaw detection assembly comprises four first driving components, a transmission component, a lifting component, a horizontal guide rail, four second driving components, a connecting component, and an ultrasonic probe; Four first driving components are respectively disposed on both sides of the worktable, the transmission component is disposed on the side of the first driving components, the lifting component is disposed on the top of the worktable, the horizontal guide rail is disposed on the side of the lifting component, and four second driving components are respectively disposed on both sides of the horizontal guide rail; the connecting component is disposed at the bottom of the horizontal guide rail, and the ultrasonic probe is disposed on the connecting component.

[0006] The first driving component includes a first mounting base, a first motor, and a first roller; the first mounting base is fixedly connected to the top of the workbench; the first motor is fixedly connected to the side of the first mounting base; the first roller is rotatably connected to the first mounting base and fixedly connected to the output end of the first motor, and is located on the side of the first mounting base.

[0007] The lifting component includes a hydraulic cylinder and a mounting bracket; the hydraulic cylinder is fixedly connected to the top of the workbench; the mounting bracket and the output rod of the hydraulic cylinder are fixedly connected, and are also fixedly connected to the horizontal guide rail, and are located between the hydraulic cylinder and the horizontal guide rail.

[0008] The second driving component includes a second mounting base, a second motor, and a second roller; the second mounting base is fixedly connected to the side of the horizontal guide rail; the second motor is fixedly connected to the side of the second mounting base; the second roller and the second mounting base are rotatably connected, and the output end of the second roller and the second motor are fixedly connected and located on the side of the second mounting base.

[0009] The transmission component includes a connecting shaft, a worm gear, a support, a rotating shaft, a worm wheel, a crossbar, a longitudinal guide rail, a longitudinal slider, and a transmission arm. The connecting shaft is fixedly connected to the side of the first roller. The worm gear is fixedly connected to the side of the connecting shaft. The support is fixedly connected to the top of the worktable. The rotating shaft is rotatably connected to the support and is located on the side of the support. The worm wheel is fixedly connected to the rotating shaft and meshes with the worm gear. The crossbar is disposed on the side of the connecting component. The longitudinal guide rail is fixedly connected to the crossbar. The longitudinal slider is slidably connected to the longitudinal guide rail and is located inside the longitudinal guide rail. One end of the transmission arm is fixedly connected to the rotating shaft, and the other end is rotatably connected to the longitudinal slider and is located between the rotating shaft and the longitudinal slider.

[0010] The connecting components include a horizontal slider, a vertical rod, a mounting block, a first spring, a housing, an oil inlet pipe, and an electrically controlled valve. The horizontal slider is slidably connected to the horizontal guide rail and is located inside the horizontal guide rail. The vertical rod is fixedly connected to the horizontal slider, and is also fixedly connected to the horizontal rod and the ultrasonic probe, and is located at the bottom of the horizontal slider. The mounting block is fixedly connected to the bottom of the vertical rod. The first spring is fixedly connected to the bottom of the mounting block. The housing is fixedly connected to the first spring, and slidably connected to the vertical rod, and is located at the bottom of the first spring. The housing has an oil storage chamber and an oil outlet hole inside. The oil inlet pipe communicates with the housing and is located on the side of the housing. The electrically controlled valve is located on the side of the oil inlet pipe.

[0011] The connecting component further includes a push rod, a telescopic rod, a sealing plate, and a second spring; the push rod is fixedly connected to the mounting block and slidably connected to the outer casing, and is located on the side of the mounting block, with one end of the push rod inside the outer casing; the telescopic rod is fixedly connected to the oil storage cavity; the sealing plate is fixedly connected to the side of the telescopic rod; the second spring is fixedly connected to both the outer casing and the sealing plate, and is located between the outer casing and the sealing plate, with the top of the sealing plate having an inclined surface.

[0012] Secondly, the present invention also provides an ultrasonic flaw detection method for weld seams of aluminum alloy welded pipes, comprising: The aluminum alloy welded pipe is placed on top of the four first drive components; The lifting component drives four secondary driving components to move downwards, thereby limiting and fixing the aluminum alloy welded pipe; The first and second driving components drive the aluminum alloy welded pipe to rotate. Under the transmission of the transmission component, the ultrasonic probe moves horizontally back and forth on the surface of the aluminum alloy welded pipe to perform ultrasonic flaw detection on the weld seam of the aluminum alloy welded pipe.

[0013] This invention discloses an ultrasonic flaw detection device and method for aluminum alloy welded pipe welds. An aluminum alloy welded pipe, consisting of two aluminum alloy pipes welded together, is placed on top of four first driving components. By controlling the lifting component, the horizontal guide rail, the second driving components, the connecting component, and the ultrasonic probe are driven downwards. The four second driving components move down to the upper surface of the aluminum alloy welded pipe, and simultaneously, the ultrasonic probe contacts the surface of the aluminum alloy welded pipe and is positioned next to the weld seam. The four first driving components and the four second driving components cooperate to limit and fix the aluminum alloy welded pipe. By controlling the opening of the first and second driving components, the aluminum alloy... The welded pipe rotates, and under the transmission of the transmission component, the transmission component drives the ultrasonic probe to reciprocate horizontally on the surface of the aluminum alloy welded pipe via the connecting component. This causes the ultrasonic probe to move in a sawtooth-shaped annular path on the surface of the aluminum alloy welded pipe. The ultrasonic probe is used to perform ultrasonic flaw detection on the weld. At the "inflection point" of the sawtooth shape, the incident angle of the ultrasonic beam of the ultrasonic probe changes. This means that an inclined planar defect (such as a crack or incomplete weld fusion) will always be close to perpendicular to the sound beam at a certain swing angle, thereby generating a strong echo. This improves the detection effect of inclined planar defects in the weld of the aluminum alloy welded pipe and avoids the problem of missed detection. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1This is a schematic diagram of the structure of the first embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipe welds according to the present invention.

[0016] Figure 2 This is a schematic diagram of the structure from another perspective of the first embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipe welds according to the present invention.

[0017] Figure 3 This is a schematic diagram of the structure from another perspective of the first embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipe welds according to the present invention.

[0018] Figure 4 This is a front cross-sectional view of the first embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipe welds according to the present invention.

[0019] Figure 5 yes Figure 4 A magnified view of detail A.

[0020] Figure 6 This is a schematic diagram of the second embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipe welds according to the present invention.

[0021] Figure 7 This is a side cross-sectional view of a second embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipe welds according to the present invention.

[0022] Figure 8 yes Figure 7 A magnified view of detail B.

[0023] Figure 9 This is a flowchart of an ultrasonic flaw detection method for aluminum alloy welded pipe welds according to the present invention.

[0024] 101-Workbench, 102-First drive component, 103-Transmission component, 104-Lifting component, 105-Horizontal guide rail, 106-Second drive component, 107-Connecting component, 108-Ultrasonic probe, 109-First mounting base, 110-First motor, 111-First roller, 112-Hydraulic cylinder, 113-Mounting bracket, 114-Second mounting base, 115-Second motor, 116-Second roller, 117-Connecting shaft, 118-Worm gear, 119-Support, 120-Rotating shaft, 121-Worm gear 122-Wheel, 123-Horizontal bar, 124-Longitudinal guide rail, 125-Longitudinal slider, 126-Transmission arm, 127-Horizontal slider, 128-Vertical bar, 129-Mounting block, 130-First spring, 131-Outer shell, 132-Oil inlet pipe, 133-Electrically controlled valve, 134-Oil storage chamber, 135-Push rod, 136-Telescopic rod, 137-Sealing plate, 138-Second spring, 139-Inclined surface, 201-Oil suction assembly, 202-Oil suction shell, 203-Negative pressure pipe, 204-Flexible lip. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0026] In a first aspect, the present invention provides an ultrasonic flaw detection device for weld seams of aluminum alloy welded pipes. A first embodiment of this ultrasonic flaw detection device for weld seams of aluminum alloy welded pipes is as follows: Please see Figures 1-5 ,in, Figure 1 This is a schematic diagram of the structure of a first embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipe welds according to the present invention; Figure 2 This is a schematic diagram of the structure from another perspective of the first embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipes according to the present invention. Figure 3 This is a schematic diagram of the structure from another perspective of the first embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipes according to the present invention. Figure 4 This is a front cross-sectional view of the first embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipe welds according to the present invention; Figure 5 yes Figure 4 A magnified view of detail A.

[0027] This invention provides an ultrasonic flaw detection device for aluminum alloy welded pipe welds, including a workbench 101 and a flaw detection assembly. The flaw detection assembly includes four first driving components 102, a transmission component 103, a lifting component 104, a horizontal guide rail 105, four second driving components 106, a connecting component 107, and an ultrasonic probe 108. The first driving component 102 includes a first mounting base 109, a first motor 110, and a first roller 111. The lifting component 104 includes a hydraulic cylinder 112 and a mounting frame 113. The second driving components 106 include a second mounting base 114, a second motor 115, and a second... The roller 116; the transmission component 103 includes a connecting shaft 117, a worm gear 118, a support 119, a rotating shaft 120, a worm wheel 121, a crossbar 122, a longitudinal guide rail 123, a longitudinal slider 124, and a transmission arm 125; the connecting component 107 includes a horizontal slider 126, a vertical rod 127, a mounting block 128, a first spring 129, a housing 130, an oil inlet pipe 131, an electric control valve 132, a push rod 135, a telescopic rod 136, a sealing plate 137, and a second spring 138; the aforementioned solution can improve the detection effect of inclined planar defects in aluminum alloy welded pipe welds and avoid the problem of missed detection.

[0028] In this specific embodiment, four first driving components 102 are respectively disposed on both sides of the worktable 101, the transmission component 103 is disposed on the side of the first driving component 102, the lifting component 104 is disposed on the top of the worktable 101, the horizontal guide rail 105 is disposed on the side of the lifting component 104, and four second driving components 106 are respectively disposed on both sides of the horizontal guide rail 105; the connecting component 107 is disposed at the bottom of the horizontal guide rail 105, and the ultrasonic probe 108 is disposed on the connecting component 107. An aluminum alloy welded pipe, consisting of two aluminum alloy pipes welded together, is placed on top of four first driving components 102. By controlling the lifting component 104, the horizontal guide rail 105, the second driving component 106, the connecting component 107, and the ultrasonic probe 108 are driven downwards. The four second driving components 106 move down to the upper surface of the aluminum alloy welded pipe, and simultaneously, the ultrasonic probe 108 contacts the surface of the aluminum alloy welded pipe and is positioned next to the weld seam. The four first driving components 102 and the four second driving components 106 cooperate to limit and fix the aluminum alloy welded pipe. By controlling the opening of the first driving components 102 and the second driving components 106, the aluminum alloy welded pipe is driven to rotate. Under the transmission of the transmission component 103, the transmission component 103 drives the ultrasonic probe 108 to reciprocate horizontally on the surface of the aluminum alloy welded pipe via the connecting component 107. This causes the ultrasonic probe 108 to move along a sawtooth-shaped annular path on the surface of the aluminum alloy welded pipe. The ultrasonic probe 108 is used to perform ultrasonic flaw detection on the weld. At the "inflection point" of the sawtooth shape, the incident angle of the ultrasonic beam of the ultrasonic probe 108 changes. This means that an inclined planar defect (such as a crack or incomplete weld fusion) will always be close to perpendicular to the sound beam at a certain swing angle, thereby generating a strong echo. This can improve the detection effect of inclined planar defects in the weld of the aluminum alloy welded pipe and avoid the problem of missed detection.

[0029] The first mounting base 109 is fixedly connected to the top of the workbench 101; the first motor 110 is fixedly connected to the side of the first mounting base 109; the first roller 111 is rotatably connected to the first mounting base 109 and fixedly connected to the output end of the first motor 110, and is located on the side of the first mounting base 109. The aluminum alloy welded pipe is placed on the four first rollers 111, and the first motor 110 drives the first rollers 111 to rotate, thereby causing the aluminum alloy welded pipe to rotate.

[0030] Secondly, the hydraulic cylinder 112 is fixedly connected to the top of the workbench 101; the mounting bracket 113 is fixedly connected to the output rod of the hydraulic cylinder 112, and also fixedly connected to the horizontal guide rail 105, and is located between the hydraulic cylinder 112 and the horizontal guide rail 105. The hydraulic cylinder 112 drives the mounting bracket 113 and the horizontal guide rail 105 to move longitudinally.

[0031] Meanwhile, the second mounting base 114 is fixedly connected to the side of the horizontal guide rail 105; the second motor 115 is fixedly connected to the side of the second mounting base 114; the second roller 116 is rotatably connected to the second mounting base 114, and the output end of the second roller 116 is fixedly connected to the output end of the second motor 115 and located on the side of the second mounting base 114. The second roller 116 cooperates with the first roller 111 to limit and fix the aluminum alloy welded pipe, and the second motor 115 drives the second roller 116 to rotate, thereby driving the aluminum alloy welded pipe to rotate.

[0032] Additionally, the connecting shaft 117 is fixedly connected to the side of the first roller 111; the worm gear 118 is fixedly connected to the side of the connecting shaft 117; the support 119 is fixedly connected to the top of the workbench 101; the rotating shaft 120 is rotatably connected to the support 119 and is located on the side of the support 119; the worm wheel 121 is fixedly connected to the rotating shaft 120 and meshes with the worm gear 118; the crossbar 122 is disposed on the side of the connecting component 107; the longitudinal guide rail 123 is fixedly connected to the crossbar 122; the longitudinal slider 124 is slidably connected to the longitudinal guide rail 123 and is located inside the longitudinal guide rail 123; one end of the transmission arm 125 is fixedly connected to the rotating shaft 120, and the other end is rotatably connected to the longitudinal slider 124 and is located between the rotating shaft 120 and the longitudinal slider 124. When the first roller 111 rotates, it drives the connecting shaft 117 and the worm gear 118 to rotate. The worm gear 118 drives the worm wheel 121, the rotating shaft 120 and the transmission arm 125 to rotate. The transmission arm 125 drives the longitudinal slider 124 to rotate. The longitudinal slider 124 drives the longitudinal guide rail 123 to move horizontally back and forth. The longitudinal guide rail 123 drives the connecting component 107 and the ultrasonic probe 108 to move horizontally back and forth.

[0033] Furthermore, the horizontal slider 126 is slidably connected to the horizontal guide rail 105 and is located inside the horizontal guide rail 105; the vertical rod 127 is fixedly connected to the horizontal slider 126 and is also fixedly connected to the horizontal rod 122 and the ultrasonic probe 108, and is located at the bottom of the horizontal slider 126; the mounting block 128 is fixedly connected to the bottom of the vertical rod 127; the first spring 129 is fixedly connected to the bottom of the mounting block 128; the outer shell 130 is fixedly connected to the first spring 129 and slidably connected to the vertical rod 127, and is located at the bottom of the first spring 129; the outer shell 130 has an oil storage chamber and an oil outlet hole 134 inside; the oil inlet pipe 131 communicates with the outer shell 130 and is located on the side of the outer shell 130; the electrically controlled valve 132 is located on the side of the oil inlet pipe 131. The horizontal guide rail 105 is provided with a groove that matches the horizontal slider 126, providing guidance for the horizontal movement of the horizontal slider 126. When the horizontal guide rail 105 moves downward, it drives the vertical rod 127 and the outer shell 130 to move downward. The outer shell 130 will contact the upper surface of the aluminum alloy welded pipe before the ultrasonic probe 108. The solenoid valve 132 opens and injects lubricating oil into the oil storage chamber 133. The lubricating oil flows to the surface of the aluminum alloy welded pipe through the oil outlet 134. Then, as the vertical rod 127 moves downward, the ultrasonic probe 108 falls onto the surface of the aluminum alloy welded pipe. The lubricating oil makes the ultrasonic probe 108 move more smoothly along the surface of the aluminum alloy welded pipe.

[0034] Finally, the push rod 135 is fixedly connected to the mounting block 128 and slidably connected to the outer casing 130, and is located on the side of the mounting block 128. One end of the push rod 135 is inside the outer casing 130. The telescopic rod 136 is fixedly connected to the oil storage chamber 133. The sealing plate 137 is fixedly connected to the side of the telescopic rod 136. The second spring 138 is fixedly connected to the outer casing 130 and the sealing plate 137 respectively, and is located between the outer casing 130 and the sealing plate 137. The top of the sealing plate 137 has an inclined surface 139. When the horizontal guide rail 105 moves downward, it causes the vertical rod 127 and the outer casing 130 to move downward. The outer casing 130 will contact the upper surface of the aluminum alloy welded pipe before the ultrasonic probe 108. The solenoid valve 132 opens, injecting lubricating oil into the oil storage chamber 133. As the vertical rod 127 and the mounting block 128 move downward, the mounting block 128 drives the push rod 135 to move downward, compressing the first spring 129. After the push rod 135 contacts the inclined surface 139 at the top of the sealing plate 137, it pushes the... When the sealing plate 137 moves away from the oil outlet 134, the second spring 138 is compressed, allowing lubricating oil to flow through the oil outlet 134 to the surface of the aluminum alloy welded pipe. After the inspection is completed, the hydraulic cylinder 112 drives the horizontal guide rail 105 to move upward, and the vertical rod 127 drives the mounting block 128 and the push rod 135 to move upward. The second spring 138 pushes the sealing plate 137 to seal the oil outlet 134, preventing accidental opening of the electronically controlled valve 132 by the operator, which would cause lubricating oil to leak out. The telescopic rod 136 is used to guide the movement of the second spring 138 and the sealing plate 137.

[0035] When using the ultrasonic flaw detection equipment for aluminum alloy welded pipe welds, the oil inlet pipe 131 is connected to the hydraulic pump. The aluminum alloy welded pipe, which consists of two aluminum alloy pipes welded together, is placed on the four first rollers 111. The hydraulic cylinder 112 is controlled to drive the mounting bracket 113, the horizontal guide rail 105, the second drive component 106, the connecting component 107, and the ultrasonic probe 108 to move downwards. When the horizontal guide rail 105 moves downwards, it drives the vertical rod 127 and the outer casing 130 to move downwards. The outer casing 130 will contact the upper surface of the aluminum alloy welded pipe before the ultrasonic probe 108. The electrically controlled valve 132 opens, and the lubricating oil is supplied. Oil is injected into the oil storage chamber 133. As the vertical rod 127 and the mounting block 128 move downward, the mounting block 128 drives the push rod 135 downward, compressing the first spring 129. After the push rod 135 contacts the inclined surface 139 at the top of the sealing plate 137, it pushes the sealing plate 137 away from the oil outlet 134. At this time, the second spring 138 is compressed, so that the lubricating oil flows through the oil outlet 134 to the surface of the aluminum alloy welded pipe. Then, as the vertical rod 127 moves downward, the ultrasonic probe 108 falls onto the surface of the aluminum alloy welded pipe (at this time, the first spring 129 is not fully compressed, and the outer shell 130 is still floating). (space); simultaneously, the four second rollers 116 move down to the upper surface of the aluminum alloy welded pipe to limit and fix the aluminum alloy welded pipe. Then, the first motor 110 and the second motor 115 start, driving the first roller 111 and the second roller 116 to rotate, thereby driving the aluminum alloy welded pipe to rotate. When the first roller 111 rotates, it will drive the connecting shaft 117 and the worm gear 118 to rotate. The worm gear 118 drives the worm wheel 121, the rotating shaft 120 and the transmission arm 125 to rotate. The transmission arm 125 drives the longitudinal slider 124 to rotate. The longitudinal slider 124 drives the longitudinal guide rail 123 to reciprocate horizontally. The longitudinal guide rail 123 drives the connecting component 107 and the ultrasonic probe 108 to reciprocate horizontally, causing the ultrasonic probe 108 to move along a sawtooth-shaped annular path on the surface of the aluminum alloy welded pipe. Ultrasonic testing of the weld is performed using the ultrasonic probe 108. At the "inflection point" of the sawtooth shape, the incident angle of the ultrasonic beam of the ultrasonic probe 108 changes. This means that a tilted planar defect (such as a crack or incomplete weld fusion) will always be nearly perpendicular to the sound beam at a certain swing angle, thus generating a strong echo. This improves the detection effect of tilted planar defects in the weld of the aluminum alloy welded pipe and avoids missed detections. Preferably, the bottom of the outer shell 130 is provided with a lip made of a wear-resistant, low-friction coefficient flexible material (such as special polyurethane, filled polytetrafluoroethylene, or ultra-high molecular weight polyethylene) to avoid wear when in contact with the surface of the aluminum alloy welded pipe.

[0036] A second embodiment of the ultrasonic flaw detection equipment for aluminum alloy welded pipe weld seams according to this application is as follows: Based on the first embodiment, please refer to Figures 6-8 ,in, Figure 6 This is a schematic diagram of the second embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipe welds according to the present invention; Figure 7 This is a side cross-sectional view of a second embodiment of an ultrasonic flaw detection device for aluminum alloy welded pipes according to the present invention; Figure 8 yes Figure 7 A magnified view of detail B.

[0037] The ultrasonic flaw detection equipment for weld seams of aluminum alloy welded pipes provided by the present invention also includes an oil absorption component 201; the oil absorption component 201 includes an oil absorption shell 202, a negative pressure pipe 203 and a flexible lip 204.

[0038] In this specific embodiment, the oil-absorbing component 201 is disposed on the side of the outer casing 130. The oil-absorbing component 201 can vacuum-absorb the lubricating oil on the surface of the aluminum alloy welded pipe, thus recovering the lubricating oil.

[0039] The oil-absorbing shell 202 is fixedly connected to the side of the outer shell 130; the negative pressure pipe 203 is connected to the oil-absorbing shell 202 and is located on the side of the oil-absorbing shell 202; the flexible lip 204 is disposed at the bottom of the oil-absorbing shell 202. The negative pressure pipe 203 is connected to the negative pressure vacuum pump, and the negative pressure vacuum pump is connected to the storage tank. Turning on the negative pressure vacuum pump can create a local negative pressure area in the oil suction shell 202 and the flexible lip 204. When the negative pressure vacuum pump starts working, a suction force is generated in this chamber to adsorb the lubricating oil on the moving path of the ultrasonic probe 108 and remove and recover the lubricating oil. The flexible lip 204 is a thin sheet or flange made of flexible, wear-resistant material (such as polyurethane, oil-resistant rubber or special silicone) and is installed on the bottom edge of the oil suction shell 202. The flexible lip 204 forms a dynamic seal. This lip will gently fit against the surface of the rotating aluminum alloy welded pipe, thereby forming an effective sealing space between the recovery chamber and the workpiece surface.

[0040] When using the ultrasonic flaw detection equipment for aluminum alloy welded pipes of the present invention, the negative pressure pipe 203 is connected to the negative pressure vacuum pump, and the negative pressure vacuum pump is connected to the storage tank. When the ultrasonic probe 108 moves along the surface of the aluminum alloy welded pipe, the lubricating oil flows to the vicinity of the ultrasonic probe 108 and forms an oil film on the surface of the aluminum alloy welded pipe. The negative pressure vacuum pump can create a local negative pressure area in the oil suction shell 202 and the flexible lip 204. When the negative pressure vacuum pump starts to work, a suction force is generated in this chamber to adsorb the lubricating oil on the moving path of the ultrasonic probe 108 and remove and recover the lubricating oil. The flexible lip 204 is a thin sheet or flange made of flexible, wear-resistant material (such as polyurethane, oil-resistant rubber or special silicone) and is installed on the bottom edge of the oil suction shell 202. The flexible lip 204 forms a dynamic seal. This lip will gently fit against the surface of the rotating aluminum alloy welded pipe, thereby forming an effective sealing space between the recovery chamber and the workpiece surface.

[0041] Secondly, please refer to Figure 9 , Figure 9 This is a flowchart of an ultrasonic flaw detection method for weld seams of aluminum alloy welded pipes according to the present invention. The present invention also provides an ultrasonic flaw detection method for weld seams of aluminum alloy welded pipes, comprising: S1 places the aluminum alloy welded pipe on top of the four first drive components 102; The oil inlet pipe 131 is connected to the liquid pump, and the aluminum alloy welded pipe, which is composed of two aluminum alloy pipes welded together, is placed on the four first rollers 111.

[0042] S2 lifting component 104 drives four second driving components 106 to move downward, thereby limiting and fixing the aluminum alloy welded pipe; By controlling the hydraulic cylinder 112 to drive the mounting bracket 113, the horizontal guide rail 105, the second driving component 106, the connecting component 107, and the ultrasonic probe 108 downwards, the horizontal guide rail 105 moves downwards, causing the vertical rod 127 and the outer casing 130 to move downwards. The outer casing 130 will contact the upper surface of the aluminum alloy welded pipe before the ultrasonic probe 108. The electrically controlled valve 132 opens, injecting lubricating oil into the oil storage chamber 133. As the vertical rod 127 and the mounting block 128 move downwards, the mounting block 128 drives the push rod 135 downwards, thus lowering the... When the first spring 129 is compressed, the push rod 135 contacts the inclined surface 139 at the top of the sealing plate 137 and pushes the sealing plate 137 away from the oil outlet 134. At this time, the second spring 138 is compressed, so that the lubricating oil flows through the oil outlet 134 to the surface of the aluminum alloy welded pipe. Then, as the vertical rod 127 moves down, the ultrasonic probe 108 falls onto the surface of the aluminum alloy welded pipe (at this time, the first spring 129 is not fully compressed, and the outer shell 130 still has room to float). At the same time, the four second rollers 116 move down to the upper surface of the aluminum alloy welded pipe to limit and fix the aluminum alloy welded pipe.

[0043] S3 The first driving component 102 and the second driving component 106 drive the aluminum alloy welded pipe to rotate. Under the transmission of the transmission component 103, the ultrasonic probe 108 moves horizontally back and forth on the surface of the aluminum alloy welded pipe to perform ultrasonic flaw detection on the weld of the aluminum alloy welded pipe. Subsequently, the first motor 110 and the second motor 115 start, driving the first roller 111 and the second roller 116 to rotate, thereby driving the aluminum alloy welded pipe to rotate. When the first roller 111 rotates, it drives the connecting shaft 117 and the worm gear 118 to rotate. The worm gear 118 drives the worm wheel 121, the rotating shaft 120 and the transmission arm 125 to rotate. The transmission arm 125 drives the longitudinal slider 124 to rotate. The longitudinal slider 124 drives the longitudinal guide rail 123 to move horizontally back and forth. The longitudinal guide rail 123 drives the connecting component 107 and the ultrasonic probe 108 to move horizontally back and forth, so that the ultrasonic probe 108 moves in a sawtooth-shaped annular path on the surface of the aluminum alloy welded pipe. The ultrasonic probe 108 is used to perform ultrasonic flaw detection on the weld.

[0044] The present invention discloses an ultrasonic flaw detection method for aluminum alloy welded pipe welds. By moving the ultrasonic probe 108 along a sawtooth-shaped annular path on the surface of the aluminum alloy welded pipe, ultrasonic flaw detection is performed on the weld using the ultrasonic probe 108. At the "inflection point" of the sawtooth shape, the incident angle of the ultrasonic beam of the ultrasonic probe 108 changes. This means that an inclined planar defect (such as a crack or incomplete weld fusion) will always be close to perpendicular to the sound beam at a certain swing angle, thereby generating a strong echo. This improves the detection effect of inclined planar defects in aluminum alloy welded pipe welds and avoids the problem of missed detection.

[0045] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. An ultrasonic flaw detection device for weld seams of aluminum alloy welded pipes, comprising a worktable, characterized in that, It also includes flaw detection components; The flaw detection assembly includes four first drive components, a transmission component, a lifting component, a horizontal guide rail, four second drive components, a connecting component, and an ultrasonic probe; Four first driving components are respectively disposed on both sides of the worktable; a transmission component is disposed on the side of the first driving components; a lifting component is disposed on the top of the worktable; a horizontal guide rail is disposed on the side of the lifting component; four second driving components are respectively disposed on both sides of the horizontal guide rail; a connecting component is disposed at the bottom of the horizontal guide rail; and an ultrasonic probe is disposed on the connecting component. Each first driving component includes a first mounting base, a first motor, and a first roller. The first mounting base is fixedly connected to the top of the worktable; the first motor is fixedly connected to the side of the first mounting base; the first roller is rotatably connected to the first mounting base and fixedly connected to the output end of the first motor, and is located on the side of the first mounting base. The transmission component includes a connecting shaft, a worm gear, a support, a rotating shaft, a worm wheel, a crossbar, a longitudinal guide rail, a longitudinal slider, and a transmission arm. The connecting shaft is fixedly connected to the side of the first roller. The worm gear is fixedly connected to the side of the connecting shaft. The support is fixedly connected to the top of the worktable. The rotating shaft is rotatably connected to the support and is located on the side of the support. The worm wheel is fixedly connected to the rotating shaft and meshes with the worm gear. The crossbar is disposed on the side of the connecting component. The longitudinal guide rail is fixedly connected to the crossbar. The longitudinal slider is slidably connected to the longitudinal guide rail and is located inside the longitudinal guide rail. One end of the transmission arm is fixedly connected to the rotating shaft, and the other end is rotatably connected to the longitudinal slider and is located between the rotating shaft and the longitudinal slider.

2. The ultrasonic flaw detection equipment for aluminum alloy welded pipe welds as described in claim 1, characterized in that, The lifting component includes a hydraulic cylinder and a mounting bracket; the hydraulic cylinder is fixedly connected to the top of the workbench; the mounting bracket and the output rod of the hydraulic cylinder are fixedly connected, and are also fixedly connected to the horizontal guide rail, and are located between the hydraulic cylinder and the horizontal guide rail.

3. The ultrasonic flaw detection equipment for aluminum alloy welded pipe welds as described in claim 1, characterized in that, The second driving component includes a second mounting base, a second motor, and a second roller; the second mounting base is fixedly connected to the side of the horizontal guide rail; the second motor is fixedly connected to the side of the second mounting base; the second roller and the second mounting base are rotatably connected, and the output end of the second roller and the second motor are fixedly connected and located on the side of the second mounting base.

4. The ultrasonic flaw detection equipment for aluminum alloy welded pipe welds as described in claim 1, characterized in that, The connecting components include a horizontal slider, a vertical rod, a mounting block, a first spring, a housing, an oil inlet pipe, and an electrically controlled valve. The horizontal slider is slidably connected to the horizontal guide rail and is located inside the horizontal guide rail. The vertical rod is fixedly connected to the horizontal slider, and is also fixedly connected to the horizontal rod and the ultrasonic probe, and is located at the bottom of the horizontal slider. The mounting block is fixedly connected to the bottom of the vertical rod. The first spring is fixedly connected to the bottom of the mounting block. The housing is fixedly connected to the first spring, and is slidably connected to the vertical rod, and is located at the bottom of the first spring. The housing has an oil storage chamber and an oil outlet hole inside. The oil inlet pipe communicates with the housing and is located on the side of the housing. The electrically controlled valve is located on the side of the oil inlet pipe.

5. The ultrasonic flaw detection equipment for aluminum alloy welded pipe welds as described in claim 4, characterized in that, The connecting component further includes a push rod, a telescopic rod, a sealing plate, and a second spring; the push rod is fixedly connected to the mounting block and slidably connected to the outer casing, and is located on the side of the mounting block, with one end of the push rod inside the outer casing; the telescopic rod is fixedly connected to the oil storage cavity; the sealing plate is fixedly connected to the side of the telescopic rod. The second spring is fixedly connected to the outer shell and the sealing plate respectively, and is located between the outer shell and the sealing plate. The top of the sealing plate has an inclined surface.

6. A method for ultrasonic testing of weld seams in aluminum alloy welded pipes, applied to the ultrasonic testing equipment for weld seams in aluminum alloy welded pipes as described in any one of claims 1-5, characterized in that, include: The aluminum alloy welded pipe is placed on top of the four first drive components; The lifting component drives four secondary driving components to move downwards, thereby limiting and fixing the aluminum alloy welded pipe; The first and second driving components drive the aluminum alloy welded pipe to rotate. Under the transmission of the transmission component, the ultrasonic probe moves horizontally back and forth on the surface of the aluminum alloy welded pipe to perform ultrasonic flaw detection on the weld seam of the aluminum alloy welded pipe.

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