Nickel alloy bar ultrasonic automatic flaw detection device

Abstract

The invention belongs to the technical field of flaw detection equipment, and particularly relates to a nickel alloy bar ultrasonic automatic flaw detection device which comprises a case, an ultrasonic transceiving unit, a bar feeding mechanism, a bar discharging mechanism and a control cabinet. The bar feeding mechanism and the bar discharging mechanism are located on the two sides of the machine box respectively, the control cabinet is fixed to one side of the machine box, the probe assemblies are arranged in the machine box, the bar feeding mechanism feeds bars into the position between the two probe assemblies, and the bars are discharged through the bar discharging mechanism. Stable and efficient online automatic flaw detection of the nickel alloy bar can be achieved, friction between the probe and the bar can be reduced, vibration interference can be buffered, the flaw detection precision is improved, the service life of equipment is prolonged, meanwhile, the coupling agent can be kept at low temperature and constant temperature, bubbles and noise are restrained, and the detection signal-to-noise ratio and the defect recognition capacity are improved.

Description

Technical Field

[0001] This invention belongs to the field of flaw detection equipment technology, and in particular relates to an ultrasonic automatic flaw detection device for nickel alloy rods. Background Technology

[0002] Nickel alloy bars used in hoisting machinery and other special electromechanical equipment are key load-bearing components that are subjected to heavy loads, impacts, and alternating loads for extended periods. Minor internal defects can easily lead to safety accidents such as fractures. To ensure the reliability and safety of equipment operation, non-destructive testing of the bars is necessary to promptly identify potential hazards such as internal cracks, porosity, and inclusions, and to ensure that the material quality meets the safety requirements of special equipment.

[0003] Traditional ultrasonic flaw detection equipment often uses water immersion or local water jacket coupling to inspect rods: the rod is immersed in water, or a water film coupling is formed between the probe and the rod through a local water cavity, and the full length and circumferential coverage are achieved by rotating the rod or rotating the probe to scan. However, because the probe and the rod are in constant relative motion, the water film is easily disturbed, washed away, and broken, making it difficult to stabilize the coupling state. At the same time, the dynamic seal is prone to wear, heat generation, and leakage due to long-term sliding friction, which not only reduces the accuracy and repeatability of the test, but also makes the equipment maintenance frequency too high. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing an automatic ultrasonic flaw detection device for nickel alloy rods.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic ultrasonic flaw detection device for nickel alloy bars, comprising a chassis, an ultrasonic transceiver unit, a bar feeding mechanism, a bar discharge mechanism, and a control cabinet, wherein the ultrasonic transceiver unit is fixed inside the chassis, the bar feeding mechanism and the bar discharge mechanism are respectively located on both sides of the chassis, and the control cabinet is fixed on one side of the chassis, and further comprising: Two symmetrical probe assemblies are both located inside the chassis. The rod feeding mechanism feeds the rod between the two probe assemblies and discharges it through the rod discharge mechanism. Four semicircular plates are fixedly connected to the side wall of the corresponding probe assembly, and two semicircular plates on the same horizontal plane are respectively set on both sides of the probe assembly. An arc-shaped sealing gasket is fixed on the inner wall of the semicircular plate, and two semicircular plates on the same vertical plane are jointly installed with a clamping and closing assembly. A liquid supply unit is located below the probe assembly and is connected to the inside of the probe assembly. The return drive unit is fixed inside the chassis, and the return drive unit drives the probe assembly to move via a semi-circular plate.

[0006] Preferably, the probe assembly includes two symmetrical arc-shaped phased array ultrasonic probes, each of which is electrically connected to an ultrasonic transceiver unit. An arc-shaped sound-transmitting protective pad is fixed to the arc surface of the arc-shaped phased array ultrasonic probe, and the inner diameter of the arc-shaped sound-transmitting protective pad is larger than the inner diameter of the arc-shaped sealing gasket.

[0007] Preferably, the clamping closure assembly includes connecting blocks fixed to the two side walls of the semicircular plate, and a clamping electric push rod is fixed between the two connecting blocks on the same vertical plane, and the clamping electric push rod is electrically connected to the control cabinet.

[0008] Preferably, the liquid supply unit includes a lower insulated cylinder disposed below the probe assembly, and a higher insulated cylinder is detachably connected to the top of the lower insulated cylinder. A pressurized electric push rod is fixedly inserted into the bottom of the lower insulated cylinder. A piston is fixed to the movable end of the pressurized electric push rod, and the piston is slidably disposed inside the lower insulated cylinder. The space above the piston inside the lower and upper insulated cylinders is filled with coupling agent. Two liquid supply pipes are fixedly inserted into the top of the upper insulated cylinder. A liquid passage groove is opened on the surface of the arc-shaped sealing gasket near the probe assembly, and the two liquid supply pipes are connected to the inner side of the arc-shaped sound-permeable protective gasket through the corresponding liquid passage groove. One of the semicircular plates is fixed with an exhaust sealing assembly connected to the liquid passage groove. The pressurized electric push rod is electrically connected to the control cabinet.

[0009] Preferably, the exhaust sealing assembly includes a vertical pipe fixed to the top of one of the semicircular plates, and the vertical pipe is connected to the interior of the liquid passage tank on the same side. A normally open solenoid valve is fixed to the lower interior of the vertical pipe, a detachable liquid level probe is installed at the top of the vertical pipe, and several exhaust holes are opened on the upper side of the pipe wall of the vertical pipe. The control cabinet controls the normally open solenoid valve, the pressurized electric push rod and the ultrasonic transceiver unit to work according to the electrical signal fed back by the liquid level probe.

[0010] Preferably, an annular semiconductor cooler is fixedly inserted into the inner side wall of the upper insulation cylinder, and the cooling end of the annular semiconductor cooler is located inside the upper insulation cylinder. The annular semiconductor cooler is electrically connected to the control cabinet.

[0011] Preferably, a sealing partition is fixed inside the upper insulation cylinder below the annular semiconductor cooler, and a cylinder is fixedly inserted into the center of the sealing partition. The top of the cylinder has a liquid inlet hole, and a liquid inlet check valve is fixed inside the liquid inlet hole. A liquid return hole is opened on the surface of the sealing partition, and a liquid return check valve is fixed inside the liquid return hole.

[0012] Preferably, the return drive unit includes a moving frame, which is sleeved on the outside of the probe assembly. A pushing block is fixed to the side wall of the moving frame, and a mounting block is fixed to the side wall of the chassis. A pushing electromagnetic push rod is fixedly inserted into the side wall of the mounting block, and the movable end of the pushing electromagnetic push rod is fixedly connected to the side wall of the pushing block. The moving frame is equipped with an elastic telescopic component, and the moving frame is connected to the semi-circular plate through the elastic telescopic component.

[0013] Preferably, the elastic telescopic component includes a slide rod fixed to the surface of the connecting block, and the slide rod slides through the end face of the movable frame, and a support spring is fixed between the inner sidewall of the movable frame and the connecting block.

[0014] Compared with existing technologies, the advantages of an ultrasonic automatic flaw detection device for nickel alloy bars are: 1. Through the coordinated operation of the chassis, ultrasonic transceiver unit, rod feeding mechanism, rod discharge mechanism, control cabinet, and probe assembly, online flaw detection of nickel alloy rods can be performed. Furthermore, through the coordinated operation of the semi-circular plate, arc-shaped sealing gasket, clamping and closing assembly, and liquid supply unit, a closed, stable, and uniformly thick liquid coupling layer can be quickly formed in the detection area, effectively preventing coupling water leakage, disturbance, and bubble generation, thereby improving ultrasonic penetration efficiency and signal stability.

[0015] 2. The back-moving drive unit allows the detection structure to move synchronously with the bar, effectively reducing the relative friction between the detection structure and the bar, reducing component wear, and structurally ensuring flaw detection accuracy, detection repeatability, and equipment service life. It is more suitable for the high-precision online flaw detection requirements of nickel alloy bars used in special equipment such as lifting machinery. In addition, the elastic telescopic component can reduce the impact of vibration during bar movement, further improving flaw detection accuracy.

[0016] 3. The ring-shaped semiconductor cooler can cool the coupling agent. In addition, the sealing baffle, cylinder, inlet check valve and return check valve can make the coupling agent circulate in a direction within the closed cavity, reduce temperature fluctuations, ensure that the coupling agent is in a stable low temperature state for a long time, reduce sound velocity drift, suppress the noise of coarse grains of nickel alloy, and further improve the signal-to-noise ratio and detection accuracy of flaw detection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an ultrasonic automatic flaw detection device for nickel alloy rods provided by the present invention; Figure 2 This is a schematic diagram of the back structure of an ultrasonic automatic flaw detection device for nickel alloy rods provided by the present invention; Figure 3 This is a schematic diagram of the arc-shaped phased array ultrasonic probe of an automatic ultrasonic flaw detection device for nickel alloy rods provided by the present invention. Figure 4 This is a schematic diagram of the internal structure of the lower and upper insulation cylinders of an ultrasonic automatic flaw detection device for nickel alloy rods provided by the present invention. Figure 5 This is a schematic diagram of the structure of a semi-circular plate of an ultrasonic automatic flaw detection device for nickel alloy rods provided by the present invention; Figure 6 This is a schematic diagram of the internal structure of the vertical tube of an ultrasonic automatic flaw detection device for nickel alloy rods provided by the present invention.

[0018] In the diagram: 1. Chassis; 2. Ultrasonic transceiver unit; 3. Bar feeding mechanism; 4. Bar discharge mechanism; 5. Control cabinet; 6. Probe assembly; 61. Arc-shaped phased array ultrasonic probe; 62. Arc-shaped acoustic protective pad; 7. Semicircular plate; 8. Arc-shaped sealing gasket; 9. Clamping and closing assembly; 91. Connecting block; 92. Clamping electric push rod; 10. Liquid supply unit; 101. Insulated lower cylinder; 102. Insulated upper cylinder; 103. Pressurized electric push rod; 104. Piston; 105. Liquid supply pipe. 106 Liquid passage tank, 11 Return drive unit, 111 Moving frame, 112 Push block, 113 Mounting block, 114 Push electromagnetic push rod, 12 Exhaust sealing assembly, 121 Vertical pipe, 122 Normally open solenoid valve, 123 Liquid level probe, 124 Exhaust port, 13 Ring semiconductor cooler, 14 Sealing partition, 15 Cylinder, 16 Inlet check valve, 17 Return check valve, 18 Elastic telescopic assembly, 181 Slide rod, 182 Support spring. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1-6As shown, an automatic ultrasonic flaw detection device for nickel alloy bars includes a housing 1, an ultrasonic transceiver unit 2, a bar feeding mechanism 3, a bar discharge mechanism 4, and a control cabinet 5. The ultrasonic transceiver unit 2 is fixed inside the housing 1. The bar feeding mechanism 3 and the bar discharge mechanism 4 are located on opposite sides of the housing 1, respectively. The control cabinet 5 is fixed on one side of the housing 1. The device also includes two symmetrical probe assemblies 6, which are disposed inside the housing 1. The bar feeding mechanism 3 feeds the bar between the two probe assemblies 6 and discharges it via the bar discharge mechanism 4. The probe assembly 6 includes two symmetrical arc-shaped phased array ultrasonic probes 61, both of which are electrically connected to the ultrasonic transceiver unit 2. An arc-shaped sound-transmitting protective pad 62 is fixed on the arc surface of the arc-shaped phased array ultrasonic probe 61, and the inner diameter of the arc-shaped sound-transmitting protective pad 62 is larger than the inner diameter of the arc-shaped sealing pad 8. The inner diameter of the arc-shaped sound-transmitting protective pad 62 is 0.2 mm larger than the inner diameter of the arc-shaped sealing pad 8. The rod feeding mechanism 3 and the rod discharging mechanism 4 both include several sets of conveying rollers, bearings, frames, motors and other components.

[0021] Four semicircular plates 7 are fixedly connected to the side walls of the corresponding probe assembly 6, and two semicircular plates 7 on the same horizontal plane are respectively set on both sides of the probe assembly 6. An arc-shaped sealing gasket 8 is fixed on the inner wall of the semicircular plate 7. Two semicircular plates 7 on the same vertical plane are jointly installed with a clamping closure assembly 9. The clamping closure assembly 9 includes connecting blocks 91 fixed on the two side walls of the semicircular plate 7. A clamping electric push rod 92 is fixed between the two connecting blocks 91 on the same vertical plane, and the clamping electric push rod 92 is electrically connected to the control cabinet 5.

[0022] The liquid supply unit 10 is located below the probe assembly 6 and is connected to the inner side of the probe assembly 6. The liquid supply unit 10 includes a lower insulated cylinder 101 located below the probe assembly 6, and a higher insulated cylinder 102 is detachably connected to the top of the lower insulated cylinder 101. A pressure-pressurizing electric push rod 103 is fixedly inserted into the bottom of the lower insulated cylinder 101. A piston 104 is fixed to the movable end of the pressure-pressurizing electric push rod 103, and the piston 104 is slidably located inside the lower insulated cylinder 101. The space above the piston 104 inside the lower insulated cylinder 101 and the upper insulated cylinder 102 is filled with coupling agent. Two liquid supply pipes 105 are fixedly inserted at the top of 2. The surface of the arc-shaped sealing gasket 8 is provided with a liquid passage groove 106 on the side near the probe assembly 6. Both liquid supply pipes 105 are connected to the inner side of the arc-shaped sound-permeable protective gasket 62 through the corresponding liquid passage groove 106. One of the semi-circular plates 7 is fixed with an exhaust sealing assembly 12 connected to the liquid passage groove 106. The pressurized electric push rod 103 is electrically connected to the control cabinet 5. The upper insulation cylinder 102 and the lower insulation cylinder 101 are connected by a flange. The lower insulation cylinder 101 can be removed periodically to replace the coupling agent inside. The coupling agent is usually deionized pure water.

[0023] The exhaust sealing assembly 12 includes a vertical pipe 121 fixed to the top of one of the semicircular plates 7, and the vertical pipe 121 is connected to the interior of the liquid passage 106 on the same side. A normally open solenoid valve 122 is fixed to the lower interior of the vertical pipe 121. A detachable liquid level probe 123 is installed on the top of the vertical pipe 121. Several exhaust holes 124 are opened on the upper side of the pipe wall of the vertical pipe 121. The control cabinet 5 controls the normally open solenoid valve 122, the pressurized electric push rod 103 and the ultrasonic transceiver unit 2 to work according to the electrical signal fed back by the liquid level probe 123. Through the normally open solenoid valve 122, the coupling agent can be effectively isolated from the external air and the flow space of the coupling agent can be sealed to ensure that it maintains sufficient stability during the detection process.

[0024] An annular semiconductor cooler 13 is fixedly inserted into the inner side wall of the upper insulation cylinder 102, and the cooling end of the annular semiconductor cooler 13 is located inside the upper insulation cylinder 102. The annular semiconductor cooler 13 is electrically connected to the control cabinet 5. A sealing partition 14 is fixedly installed inside the upper insulation cylinder 102 below the annular semiconductor cooler 13, and a cylinder 15 is fixedly inserted into the center of the sealing partition 14. A liquid inlet is opened at the top of the cylinder 15, and a liquid inlet check valve 16 is fixed inside the liquid inlet. The sealing partition 14... The surface of the device has a return hole, and a return check valve 17 is fixed inside the return hole. Through the inlet check valve 16 and the return check valve 17, the coupling agent can be directionally circulated to ensure that it can fully exchange heat with the cooling end of the annular semiconductor cooler 13. The hot end of the annular semiconductor cooler 13 is located outside the insulation upper cylinder 102, and a cooling fan (not shown in the figure) corresponding to the position of the annular semiconductor cooler 13 is installed inside the casing 1 to assist in the dissipation of heat from its hot end and ensure its continuous cooling effect.

[0025] The return drive unit 11 is fixed inside the housing 1, and the return drive unit 11 drives the probe assembly 6 to move via the semi-circular plate 7. The return drive unit 11 includes a moving frame 111, which is sleeved on the outside of the probe assembly 6. A pushing block 112 is fixed to the side wall of the moving frame 111, and a mounting block 113 is fixed to the side wall of the housing 1. A pushing electromagnetic push rod 114 is fixedly inserted into the side wall of the mounting block 113, and the movable end of the pushing electromagnetic push rod 114 is fixedly connected to the side wall of the pushing block 112. The 11 is equipped with an elastic telescopic component 18, and the movable frame 111 is connected to the semi-circular plate 7 through the elastic telescopic component 18. The elastic telescopic component 18 includes a slide rod 181 fixed on the surface of the connecting block 91, and the slide rod 181 slides through the end face of the movable frame 111. A support spring 182 is fixed between the inner side wall of the movable frame 111 and the connecting block 91. By giving the connecting block 91 and the movable frame 111 a certain telescopic movement space, the impact of vibration on flaw detection during nickel alloy rod transportation can be effectively reduced.

[0026] The operating principle of the present invention is explained as follows: The nickel alloy rod to be tested is placed in the rod feeding mechanism 3, and one end of the rod is inserted into the two arc-shaped phased array ultrasonic probes 61. Then the control cabinet 5 is started, and the control cabinet 5 will immediately start the flaw detection work. After the control cabinet 5 is started, it immediately controls the clamping electric push rod 92 to work. The clamping electric push rod 92 pulls the connecting blocks 91 on both sides to move towards each other, thereby causing the semi-circular plates 7 on both sides and the arc-shaped phased array ultrasonic probe 61 to fit against the outside of the nickel alloy rod. The arc-shaped sealing gasket 8 can form an annular coupling agent gap of about 0.2mm between the arc-shaped sound-transmitting protective gasket 62 and the nickel alloy rod (the inner diameter of the arc-shaped sound-transmitting protective gasket 62 is larger than the inner diameter of the arc-shaped sealing gasket 8). At this time, the clamping electric push rod 92 stops working according to the preset program, and the control cabinet 5 synchronously controls the pressurizing electric push rod 103 to work. The pressurizing electric push rod 103 pushes the piston 104 upward, and the piston 104 will then push the upper... The coupling agent is squeezed into the annular coupling agent gap at the arc-shaped sound-permeable protective pad 62 through the liquid supply pipe 105 and the liquid passage 106. After the coupling agent enters the gap, the air inside the gap will enter the vertical pipe 121 through the liquid passage 106 on the upper side and finally be discharged through the exhaust hole 124. As the coupling agent fills the entire gap, some coupling agent will enter the vertical pipe 121 and overflow the normally open solenoid valve 122. At this time, the liquid level probe 123 will detect that the liquid level of the coupling agent has reached the preset value (the liquid level probe 123 determines the liquid level height in the vertical pipe 121 by emitting infrared light and calculating the time required to receive the reflected infrared light). Then the liquid level probe 123 will send an electrical signal back to the control cabinet 5. After receiving the electrical signal from the level probe 123, the control cabinet 5 immediately controls the normally open solenoid valve 122 to close, simultaneously stops the pressurized electric push rod 103, and starts the ultrasonic transceiver unit 2. The ultrasonic transceiver unit 2 excites the arc-shaped phased array ultrasonic probe 61 to emit detection sound waves and receives the echo signal reflected by the internal defects of the nickel alloy rod. The signal is amplified, filtered, and processed, so that the two arc-shaped phased array ultrasonic probes 61 can be used to detect flaws at the detection position of the nickel alloy rod. Among them, because the semi-circular plate 7 clamps the solid under the action of the clamping electric push rod 92, The probe is fixed on the outside of the nickel alloy rod. Therefore, when the nickel alloy rod moves, it will drive the arc-shaped phased array ultrasonic probe 61 to move through the semi-circular plate 7. So when the arc-shaped phased array ultrasonic probe 61 is performing flaw detection on the nickel alloy rod, it can remain relatively stationary with the nickel alloy rod. Moreover, since the coupling agent fills the inside of the arc-shaped sound-transmitting protective pad 62, the air has also been expelled, which effectively avoids the interference of air bubbles, water film disturbance and interface gaps on the propagation of ultrasonic waves. This makes the coupling state highly stable, and there is no relative sliding, no sealing wear and no frictional heat generation during the detection process, which greatly improves the flaw detection signal-to-noise ratio, detection accuracy and equipment operation reliability. After the ultrasonic transceiver unit 2 receives the detection signal, it synchronously sends a feedback signal to the control cabinet 5. At this time, the control cabinet 5 first controls the pressurized electric push rod 103 to move back, and simultaneously controls the normally open solenoid valve 122 to open. At this time, the coupling agent flows back into the insulation lower cylinder 101 through the supply pipe 105. Then, the control cabinet 5 controls the clamping electric push rod 92 to reset. At this time, the semicircular plate 7 is disengaged from the nickel alloy rod, and the control cabinet 5 controls the pushing electromagnetic push rod 114 to work. The pushing electromagnetic push rod 114 pushes the moving frame 111 to quickly reset through the pushing block 112. At this time, the semicircular plate 7 and the arc-shaped phased array ultrasonic probe 61 will also reset. Then, the control cabinet 5 controls each component to repeat the above steps to perform flaw detection on the next section of the nickel alloy rod. The length of each detection section matches the reset stroke of the pushing electromagnetic push rod 114, and a counterweight is set between adjacent detection sections. The overlapping detection area allows for sequential, uninterrupted, and complete detection of multiple segments, achieving continuous full-coverage flaw detection of the entire length and circumferential cross-section of the nickel alloy rod (the arc-shaped phased array ultrasonic probe 61 has a single detection length range of 100mm, and after retraction, the coverage length of the previous segment is approximately 10mm). The moving frame 111 and the semi-circular plate 7 are connected by a slide rod 181 and a support spring 182. After the semi-circular plate 7 is clamped and fixed to the nickel alloy rod, it maintains an elastic expansion and contraction space with the moving frame 111. Since the rod feeding mechanism 3 is prone to slight vibrations when conveying the nickel alloy rod, this elastic expansion and contraction space effectively buffers and absorbs the vibrations generated during the conveying of the nickel alloy rod, ensuring that the probe and the rod surface remain stably attached and the coupling layer is not damaged. This significantly improves the anti-interference capability, echo signal consistency, and flaw detection accuracy of the detection process. Secondly, during the detection process, the couplant can be cooled by the annular semiconductor cooler 13. When the piston 104 moves upward to squeeze the couplant, the couplant can only flow out along the inlet check valve 16. When the piston 104 moves downward, the couplant can only flow back along the return check valve 17. By directing the flow of the couplant, it can be ensured that the couplant is fully cooled by the annular semiconductor cooler 13, so that the temperature of the couplant remains sufficiently stable. The couplant with a stable temperature can effectively reduce the sound velocity drift and acoustic impedance changes caused by temperature fluctuations, ensuring that the ultrasonic waves propagate stably and attenuate uniformly within the coupling layer. This improves the stability and recognition of the defect echo signal, and further enhances the detection accuracy and long-term reliability of the overall flaw detection system.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic ultrasonic flaw detection device for nickel alloy bars, comprising a chassis (1), an ultrasonic transceiver unit (2), a bar feeding mechanism (3), a bar discharge mechanism (4), and a control cabinet (5), wherein the ultrasonic transceiver unit (2) is fixed inside the chassis (1), the bar feeding mechanism (3) and the bar discharge mechanism (4) are respectively located on both sides of the chassis (1), and the control cabinet (5) is fixed on one side of the chassis (1), characterized in that, Also includes: Two symmetrical probe assemblies (6) are both located inside the housing (1). The rod feeding mechanism (3) feeds the rod between the two probe assemblies (6) and discharges it through the rod discharge mechanism (4). Four semicircular plates (7) are fixedly connected to the side wall of the corresponding probe assembly (6), and two semicircular plates (7) on the same horizontal plane are respectively set on both sides of the probe assembly (6). The inner wall of the semicircular plate (7) is fixed with an arc-shaped sealing gasket (8), and two semicircular plates (7) on the same vertical plane are jointly installed with a clamping and closing assembly (9). The liquid supply unit (10) is located below the probe assembly (6), and the liquid supply unit (10) is connected to the inner side of the probe assembly (6); The return drive unit (11) is fixed inside the chassis (1), and the return drive unit (11) drives the probe assembly (6) to move through the semi-circular plate (7).

2. The ultrasonic automatic flaw detection device for nickel alloy rods according to claim 1, characterized in that, The probe assembly (6) includes two symmetrical arc-shaped phased array ultrasonic probes (61). The arc-shaped phased array ultrasonic probes (61) are electrically connected to the ultrasonic transceiver unit (2). The arc surface of the arc-shaped phased array ultrasonic probe (61) is fixed with an arc-shaped sound-transmitting protective pad (62), and the inner diameter of the arc-shaped sound-transmitting protective pad (62) is larger than the inner diameter of the arc-shaped sealing pad (8).

3. The automatic ultrasonic flaw detection device for nickel alloy rods according to claim 1, characterized in that, The clamping closure assembly (9) includes connecting blocks (91) fixed to the two side walls of the semicircular plate (7), and a clamping electric push rod (92) is fixed between the two connecting blocks (91) on the same vertical plane, and the clamping electric push rod (92) is electrically connected to the control cabinet (5).

4. The automatic ultrasonic flaw detection device for nickel alloy rods according to claim 1, characterized in that, The liquid supply unit (10) includes a lower insulated cylinder (101) disposed below the probe assembly (6), and a higher insulated cylinder (102) is detachably connected to the top of the lower insulated cylinder (101). A pressure-pressurizing electric push rod (103) is fixedly inserted into the bottom of the lower insulated cylinder (101). A piston (104) is fixed to the movable end of the pressure-pressurizing electric push rod (103), and the piston (104) is slidably disposed inside the lower insulated cylinder (101). The interiors of the lower insulated cylinder (101) and the upper insulated cylinder (102) are located above the piston (104). The space is filled with coupling agent. Two liquid supply pipes (105) are fixedly inserted into the top of the heat-insulating upper cylinder (102). The surface of the arc-shaped sealing gasket (8) is provided with a liquid passage groove (106) on the side near the probe assembly (6). Both liquid supply pipes (105) are connected to the inner side of the arc-shaped sound-transmitting protective pad (62) through the corresponding liquid passage groove (106). One of the semi-circular plates (7) is fixed with an exhaust sealing assembly (12) connected to the liquid passage groove (106). The pressurized electric push rod (103) is electrically connected to the control cabinet (5).

5. The ultrasonic automatic flaw detection device for nickel alloy rods according to claim 4, characterized in that, The exhaust sealing assembly (12) includes a vertical pipe (121) fixed to the top of one of the semicircular plates (7), and the vertical pipe (121) is connected to the interior of the liquid passage (106) on the same side. A normally open solenoid valve (122) is fixed to the lower interior of the vertical pipe (121). A detachable liquid level probe (123) is installed on the top of the vertical pipe (121). Several exhaust holes (124) are opened on the upper side of the pipe wall of the vertical pipe (121). The control cabinet (5) controls the normally open solenoid valve (122), the pressurized electric push rod (103) and the ultrasonic transceiver unit (2) to work according to the electrical signal fed back by the liquid level probe (123).

6. The ultrasonic automatic flaw detection device for nickel alloy rods according to claim 4, characterized in that, An annular semiconductor cooler (13) is fixedly inserted into the inner side wall of the upper insulation cylinder (102), and the cooling end of the annular semiconductor cooler (13) is located inside the upper insulation cylinder (102). The annular semiconductor cooler (13) is electrically connected to the control cabinet (5).

7. The ultrasonic automatic flaw detection device for nickel alloy rods according to claim 6, characterized in that, The heat-insulating upper cylinder (102) is fixed with a sealing partition (14) located below the annular semiconductor cooler (13), and a cylinder (15) is fixedly inserted at the center of the sealing partition (14). The top of the cylinder (15) is provided with a liquid inlet hole, and a liquid inlet check valve (16) is fixed inside the liquid inlet hole. The surface of the sealing partition (14) is provided with a liquid return hole, and a liquid return check valve (17) is fixed inside the liquid return hole.

8. The ultrasonic automatic flaw detection device for nickel alloy rods according to claim 3, characterized in that, The return drive unit (11) includes a moving frame (111), which is sleeved on the outside of the probe assembly (6). A push block (112) is fixed on the side wall of the moving frame (111), and a mounting block (113) is fixed on the side wall of the chassis (1). A push electromagnetic push rod (114) is fixedly inserted into the side wall of the mounting block (113), and the movable end of the push electromagnetic push rod (114) is fixedly connected to the side wall of the push block (112). An elastic telescopic component (18) is installed on the moving frame (111), and the moving frame (111) is connected to the semi-circular plate (7) through the elastic telescopic component (18).

9. The ultrasonic automatic flaw detection device for nickel alloy rods according to claim 8, characterized in that, The elastic telescopic component (18) includes a slide rod (181) fixed to the surface of the connecting block (91), and the slide rod (181) slides through the end face of the moving frame (111). A support spring (182) is fixed between the inner sidewall of the moving frame (111) and the connecting block (91).

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