Drum-type probe device for ultrasonic testing

[0024] The present invention will be described in further detail below in conjunction with the embodiments of the drawings.

[0025] Such as figure 1 with figure 2 As shown, the ultrasonic detection roller probe device in this embodiment includes a central shaft 1, a probe 12, an inner flange 1a, an outer flange 1b, an outer membrane 10, a motor, a reducer 37, a car body, a platform 5, and a slider. 67. Tension spring 64 and traction cable 63.

[0026] Combine image 3 with Figure 4 As shown, the center shaft 1 is hollow for cables to pass through and sealed at both ends. One side of the outer wall is provided with four through holes, and the through holes are provided with a mounting seat 11; the inner wall of the mounting seat 11 has an annular groove near the center shaft, A sealing ring 14 is arranged in the annular groove, and there are four probes 12, and each probe 12 is hermetically arranged on the mounting base 11 and exposing the emitting end surface; specifically, a positioning hole is opened on one side of the mounting base 11 near the outer end , The fastener 13 is inserted into the positioning hole to position the probe 12 and fix it with a positioning nut.

[0027] There are two inner flanges 1a, which are respectively provided at both ends of the center shaft 1; there are also two outer flanges 1b, which are respectively provided at both ends of the center shaft 1 and are located outside the inner flange 1a; the outer flange 1b is hollow and two ends. A shaft seal and a shaft sleeve 3 are arranged from the outside to the end. The outer wall cover of the shaft seal is provided with a gland 36, and the shaft sleeve 3 is provided with a deep groove ball bearing 34 which is rotated and matched with the central shaft. A first elastic retaining ring 31 and a grid ring 39 are provided between the inner wall of the sleeve 3 and the outer wall of the central shaft 1, and a second elastic retaining ring 32 and an O-ring 38 are provided between the outer wall of the sleeve 3 and the inner wall of the outer flange 1b. .

[0028] The seal ring 7 is installed between the center shaft 1 and the outer flange 1b to block oil, prevent the slippery ester in the bearing from being lost and damp, and to prevent leakage of the coupling medium in the drum after the sliding seal ring is worn. The first elastic retaining ring 31 ensures that the central shaft 1 and the sleeve 3 do not move axially. The O-ring 38 is used for waterproofing. The grid ring 39 is used for sealing to prevent the internal coupling medium from leaking. The second elastic retaining ring 32 ensures that the outer flange 1b and the shaft sleeve 3 do not move axially.

[0029] The outer membrane 10 is made of a flexible sound-transmitting material, which is located outside the central shaft 1 and wraps the probe 12, and its two ends are sealed between the outer end surface of the inner flange 1a and the inner end surface of the outer flange 1b. The outer flange 1b and inner flange 1a are clamped with the edge of the flexible cylindrical outer membrane 10 to form a sealed connection to form an inner sealed space of the probe 12 between the outer flange 1b and the inner flange 1a, and the inner sealed space of the probe 12 is filled Liquid coupling medium. The outer flange 1b and the inner flange 1a are connected by bolts and nuts.

[0030] The reducer 37 is connected to a motor (not shown in the figure), and the power output end of the reducer 37 is connected to the central shaft 1. The speed reducer 37 in this embodiment is preferably a worm gear structure. The motor adopts a micro motor to control the probe 12 to swing in the circumferential direction around the central axis 1. The electric switch controls the movement of the motor, drives the variable speed gear in the reducer 37 to reduce the speed to low speed operation, and drives the central axis 1 to rotate to reach the internal probe 12 Circumferential swing.

[0031] Such as figure 1 As shown, the vehicle body includes a bottom plate 61 and a handle 62. The handle 62 is provided on one side of the bottom plate 61. A guide wheel 65 is provided at the connection between the handle 62 and the bottom plate 61; a slider 67 is movably provided on the bottom plate 61; a tension spring 64 One end is connected to the fixed post 66 (or fixing bolt) on the bottom plate 61, and the other end is connected to one side of the slider 67. One end of the traction cable 63 is set on the handle 62, and the other end bypasses the guide wheel 65 and connects to the slider 67. The other side is connected; one side of the platform 5 has a roller 68, which is arranged on the inclined surface of the slider 67 in a rolling manner.

[0032] Combine Figure 4 As shown, a first through hole is opened through the outer flange 1b and inner flange 1a on one side, and a second through hole and a third through hole are opened through the outer flange 1b and the inner flange 1a on the other side. A water inlet component is arranged in the through hole, an exhaust component is arranged in the second through hole, and a drainage component is arranged in the third through hole. The drain assembly and the inlet assembly are not connected to each other. The water inlet assembly includes a water inlet pipe 41, a water inlet pipe nut 42 and a silicone tube 43. The water inlet pipe 41 is in a sealed connection with the first through hole. The water inlet pipe nut 42 controls the switch of the water inlet pipe 41. The silicone tube 43 is sleeved on the water inlet pipe 41. Water can be injected into the probe 12 through the water inlet pipe 41. The exhaust assembly and the drainage assembly are installed on the outer flange 1b in axially symmetrical positions. The exhaust assembly includes an L-shaped exhaust pipe 44, a PTFE gasket 441 and an exhaust pipe nut 45, and the drainage assembly includes an L-shaped drain pipe. 46. ​​Teflon pad 461 and drain pipe nut 47.

[0033] When it is necessary to inject water into the probe 12, first tighten the drain pipe nut to close the drain assembly, then unscrew the drain pipe nut to open the exhaust assembly, and then open the water inlet pipe 41 to connect the external water source to the inside of the probe 12. When the probe 12 After the interior is filled with water, close the water inlet pipe 41 and the exhaust assembly; when discharging water, first open the water inlet pipe 41 or the exhaust assembly, and then open the drainage assembly to allow the water to flow out by itself.

[0034] Combine figure 2 As shown, the platform 5 is located above the bottom plate 61 and can be raised and lowered on the bottom plate 61, the central axis 1, the outer membrane 10 and the outer flange 1b are located below the bottom plate 61, and the platform 5 is a rectangular work surface, which is used to adjust the sound of the probe 12. Beam direction and overall height. The outer end of the outer flange 1b is provided with a connecting piece 35, two connecting screws 54 are arranged at both ends of the bottom plate 61, the upper end is connected with the platform 5, and the lower end is movably connected with the connecting piece 35. The top end of the connecting screw 54 extends out of the platform 5 and is sequentially provided with an adjusting nut 51, a positioning pressure block 52 and a locking nut 53 from the outside to the inside. The bottom end of the connecting screw 54 has a ball head 55, and correspondingly, the upper end of the connecting piece 35 It has a ball groove that cooperates with the ball head 55 movably. A plurality of first perforations are provided on the periphery of the platform 5. Correspondingly, the bottom plate 61 is provided with a plurality of second perforations. Each second perforation is provided with a linear bearing 57, and a plurality of lead screws 56 pass through the first perforation and the linear bearing. Inside 57, the top end is fixed with a fixing nut, and the bottom end is provided with a buffer spring 58 through a bolt 59. There are four lead screws 56 in this embodiment. By adjusting the adjusting nut 51 at the upper end of the connecting screw 54 to realize the lifting of the connecting screw 54, the probe 12 is driven to slightly swing in the left-right direction.

[0035] Combine figure 1 As shown, the operator controls the handle 62 to apply a pulling force to the traction cable 63, and the slider is moved in the guide rail on the bottom plate 61 through the traction cable 63, and the tension spring 64 is stretched. Using the upward inclined surface of the slider, the roller 68 is in The inclined surface is lifted, so that the platform 5 and the probe 12 are lifted at the same time, so that the probe 12 is lifted off the ground to avoid unnecessary abrasion of the outer membrane 10 in the non-detection state or when the inspection vehicle is turning; when the operator releases the handle 62, pull The spring 64 contracts to generate a pulling force on the slider to return it to its original position. The roller 68 descends on the inclined surface, and the platform 5 and the probe 12 also descend at the same time to return to the working position.

[0036] The probe 12 in this embodiment adopts an ultrasonic water immersion straight probe, and each probe 12 can be installed and disassembled independently. If one of them is damaged, only the damaged probe 12 needs to be replaced. The ultrasonic beam emitted by the probe 12 passes through the coupling medium (water), penetrates the outer film 10 and enters the steel plate. When the ultrasonic wave propagates inside the steel plate and encounters defects, part or all of the sound waves will be reflected back, and pass through the outer film 10 and the coupling medium. Received by the probe 12. With the movement of the inspection vehicle, the probe 12 continuously rolls on the surface of the steel plate, which can realize uninterrupted detection of the steel plate.

[0037] Due to the addition of the outer membrane, the outer membrane is in contact with the surface of the steel plate during the detection process, and the probe does not directly contact the surface of the steel plate, reducing the wear of the probe and ensuring the service life of the probe. In addition, multiple probes are installed in a central axis, the scanning area is 400mm wide, the thickness of the steel plate is 13-100mm, and the ultrasonic beam adjustment function can realize the overall lifting height of the ultrasonic roller probe> 5cm, realize the horizontal and circumferential swing of the water-immersed straight probe group inside the drum probe, the swing amplitude> ±2 degrees; It can realize convenient ultrasonic sound beam direction adjustment, improve the adaptability of roller probes, greatly increase the detection speed, reduce labor intensity, and meet the application requirements of high-speed detection speed steel plate flaw detection vehicles.