A steel pipe flaw detection device

Abstract

This utility model relates to a steel pipe flaw detection device, including a feeding mechanism. The feeding mechanism includes a feeding frame with several equally spaced feeding wheels along the feeding direction. A clamping mechanism is located at the end of the feeding mechanism. A lower pressure wheel is located at the front and rear of the clamping frame. A U-shaped housing is located in the middle of the clamping platform. A pair of V-shaped cylinders are located inside the housing. The base of each cylinder is hinged to the housing. A pair of fork-shaped hinge arms are located on the housing below each piston rod. The lowest point of each pair of fork-shaped hinge arms is connected by a first shaft. The two ends of the first shaft are hinged to the corresponding side of the housing. A second shaft is located in the middle of each pair of fork-shaped hinge arms, with an upper pressure wheel on the second shaft. A third shaft is located at the upper end of each pair of fork-shaped hinge arms, and the third shaft is hinged to the piston rod of the cylinder on the corresponding side. An ultrasonic automatic flaw detector is located at the end of the clamping mechanism.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe flaw detection technology, and in particular to a steel pipe flaw detection device. Background Technology

[0002] Steel pipes are a widely used and important steel material. During the steel pipe production process, due to various factors, defects such as longitudinal cracks, transverse cracks, folds, and delamination often exist on the pipe wall. If the steel pipe has defects, it will break during use, causing accidents and even serious consequences, potentially resulting in significant economic losses or even casualties. Therefore, steel pipes for important applications require sophisticated non-destructive testing equipment to perform online flaw detection to ensure the quality of steel pipes leaving the factory. The main flaw detection method currently available is ultrasonic testing.

[0003] Ultrasonic automatic flaw detection devices are widely used, especially in the industrial field of flaw detection for steel pipe parts, such as automatic flaw detection devices for steel pipe parts. Current online ultrasonic flaw detection of steel pipes generally uses a probe-water film coupling method. During automatic ultrasonic flaw detection of steel pipes, the probe is typically pressed against the outer surface of the steel pipe at a certain distance using a mechanical mechanism. An adjustment system on the probe holder is used to maintain a certain gap between the probe and the steel pipe, and water is filled to form a coupling water film. Flaw detection relies on ultrasonic emission. However, in actual automatic flaw detection processes, vibrations during the transmission of the steel pipe during inspection can cause changes in the amplitude of the defect signal. If this is not adjusted in time, it will affect the reliability and accuracy of the flaw detection. Utility Model Content

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a steel pipe flaw detection device.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a steel pipe flaw detection device, including a feeding mechanism, wherein the feeding mechanism includes a feeding frame, and the feeding frame is provided with a plurality of feeding wheels arranged at equal intervals along the feeding direction;

[0006] The feeding mechanism has a clamping mechanism at its end, which includes a clamping frame. The clamping frame has a lower pressure roller at its front end and a lower pressure roller at its rear end. The clamping platform has an inverted U-shaped housing in the middle. The housing contains a pair of V-shaped cylinders. The base of each cylinder is hinged to the housing. A pair of fork-shaped hinge arms are provided on the housing below each piston rod. The lowest point of each pair of fork-shaped hinge arms is connected by a first shaft. The two ends of the first shaft are hinged to the corresponding side of the housing. A second shaft is provided in the middle of each pair of fork-shaped hinge arms. An upper pressure roller is provided on the second shaft. A third shaft is provided at the upper end of each pair of fork-shaped hinge arms. The third shaft is hinged to the piston rod of the cylinder on the corresponding side.

[0007] An ultrasonic automatic flaw detector is provided at the end of the clamping mechanism.

[0008] In a further preferred embodiment, the ultrasonic automatic flaw detector is also provided with a clamping mechanism at its end.

[0009] A further preferred technical solution is that an automatic feeding mechanism is provided on one side of the feeding mechanism.

[0010] In a further preferred embodiment, the automatic feeding mechanism includes a feeding frame, and a drive shaft is provided on the output end of the feeding frame. One end of the drive shaft is connected to the output shaft of the first motor. At least two coaxial turntables are provided on the drive shaft, and at least one groove is provided on the outer circumference of each turntable. The groove flips the elongated workpiece from the inside of the output end of the feeding frame to the outside of the output end of the feeding frame through the rotation of the turntable.

[0011] In a further preferred embodiment, the upper surface of the frame has a downward-sloping first guide surface from the input end to the output end.

[0012] In a further preferred embodiment, the input end of the upper surface of the frame has a horizontal second guide surface that smoothly transitions to the first guide surface.

[0013] A further preferred technical solution is to provide an intermittent feeding component at the frame position corresponding to the connection between the first guide surface and the second guide surface.

[0014] In a further preferred embodiment, the intermittent feeding assembly includes a rotating shaft with at least two baffles and at least two rotating arms fixedly connected to it. Each rotating arm is hinged to the front end of the piston rod of a cylinder, and the base of each cylinder is hinged to the frame.

[0015] In a further preferred embodiment, a lifting assembly is provided on the frame below the second guide surface.

[0016] In a further preferred embodiment, the lifting assembly includes a lifting frame. The horizontal end of the lifting frame is hinged to the frame position corresponding to the connection between the first guide surface and the second guide surface. At least two worm gear boxes are provided below the lifting frame. The base of each worm gear box is hinged to the frame. Each worm gear box has a coaxial internal threaded hole on its worm wheel and a lead screw is threadedly connected to it. The upper end of the lead screw is hinged to the lifting frame. The worms of the two worm gear boxes are connected in series through a transmission rod. One end of the transmission rod is connected to the output shaft of the second motor.

[0017] The advantages and beneficial effects of this utility model are as follows: the clamping mechanism can ensure that after the steel pipe enters the ultrasonic automatic flaw detector, a stable gap is maintained between the steel pipe and the probe. Even when the pipe is filled with water, the clamping of the upper and lower pressure rollers can ensure that the steel pipe is transported stably.

[0018] To achieve stable flaw detection, a second clamping mechanism is provided at the end of the ultrasonic automatic flaw detector. By providing a clamping mechanism at both the front and rear of the ultrasonic automatic flaw detector, the steel pipe can be transported more stably during flaw detection, thus making the flaw detection more accurate. Attached Figure Description

[0019] Figure 1 This is an isometric drawing of the present invention;

[0020] Figure 2 This is a partial isometric view of the present invention;

[0021] Figure 3 This is an isometric drawing of the clamping mechanism of this utility model;

[0022] Figure 4 This is an isometric drawing of the automatic feeding mechanism of this utility model;

[0023] Figure 5 This is a side view of the automatic feeding mechanism of this utility model;

[0024] In the diagram: 10. Feeding mechanism; 11. Feeding platform; 12. Feeding wheel; 13. Bearing housing;

[0025] 20. Clamping mechanism; 21. Clamping platform; 22. Lower pressure roller; 23. Upper pressure roller; 24. Cylinder; 25. Housing; 26. Fork-shaped hinge arm;

[0026] 30. Ultrasonic automatic flaw detector;

[0027] 40. Automatic feeding mechanism; 41. Feeding frame; 41a. First guide surface; 41b. Second guide surface; 42. Drive shaft; 43. Turntable; 43a. Groove; 44. First motor; 45. Feeding cylinder; 46. Baffle; 47. Stop block; 48. Rotary arm; 49. Rotary shaft; 410. Lifting frame; 411. Worm gearbox; 411a. Lead screw; 412. Second motor; 413. Guide rail; 414. Transmission rod. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0029] like Figure 1-5 As shown, a steel pipe flaw detection device includes a feeding mechanism 10, which includes a feeding frame and a feeding platform 11. The feeding platform 11 has a plurality of feeding wheels 12 arranged at equal intervals along the feeding direction. A V-shaped groove is formed on the outer circumference of each feeding wheel 12 so that the steel pipe can be stably transported on the feeding wheel 12. The two ends of the axle of each feeding wheel 12 are respectively supported on the feeding platform through a bearing seat 13.

[0030] The feeding wheel 12 is driven by a drive mechanism. The drive mechanism is preferably a motor output that drives the feeding wheel 12 to rotate through a transmission mechanism. The transmission mechanism can use a toothed belt that meshes with a pulley. The transmission is non-slip, oil-resistant, and wear-resistant, and is suitable for long-distance medium- and low-speed transmission.

[0031] A clamping mechanism 20 is provided at the end of the feeding mechanism 10. The clamping mechanism 20 includes a clamping frame, which includes a clamping platform 21. The clamping platform 21 has a pressure roller 22 at its beginning and end. A V-shaped groove is formed on the outer circumference of the pressure roller 22 so that the steel pipe can be transported stably on the pressure roller 22. The two ends of the axle of each pressure roller 22 are respectively mounted on the clamping platform 21 through a bearing seat.

[0032] The clamping platform 21 has an inverted U-shaped housing 25 in the middle. Inside the housing 25 is a pair of V-shaped cylinders 24. The base of each cylinder 24 is hinged to the housing 25, and the piston rod of each cylinder 24 is inclined downwards. Below each piston rod, on the housing 25, is a pair of fork-shaped hinge arms 26. The lowest point of each pair of fork-shaped hinge arms 26 is connected by a first shaft. The two ends of the first shaft are respectively hinged to the corresponding side of the housing 25. A third... The second shaft has an upper pressure roller 23, and each pair of fork-shaped hinge arms 26 has a third shaft at its upper end. The third shaft is hinged to the piston rod of the cylinder 24 on the corresponding side. Thus, when the steel pipe moves from the beginning to the end of the clamping mechanism 20, the cylinder 24 drives the fork-shaped hinge arms 26 to rotate around the axis of the first shaft, causing the upper pressure roller 23 to press down on the steel pipe. In this way, the upper pressure roller 23 and the lower pressure roller 22 clamp the steel pipe, and the steel pipe can also move along the feeding direction between the upper pressure roller 23 and the lower pressure roller 22.

[0033] The clamping mechanism 20 is equipped with an ultrasonic automatic flaw detector 30 at its end. The ultrasonic automatic flaw detector 30 typically uses a probe-water film coupling method for online flaw detection. When performing automatic ultrasonic flaw detection on steel pipes, the probe is generally pressed against the outer surface of the steel pipe at a certain distance using a mechanical mechanism. A certain gap is maintained between the probe and the steel pipe by adjusting the adjustment system on the probe holder, and water is filled to form a coupling water film. Flaw detection is achieved by relying on ultrasonic emission, thus realizing online ultrasonic flaw detection of the steel pipe. Commercially available Feitai steel pipe ultrasonic automatic flaw detection equipment can be used.

[0034] In this way, the clamping mechanism 20 can ensure that after the steel pipe enters the ultrasonic automatic flaw detector 30, a stable gap is maintained between the steel pipe and the probe. Even when the pipe is filled with water, the clamping of the upper pressure roller 23 and the lower pressure roller 22 can ensure that the steel pipe is transported stably.

[0035] To achieve stable flaw detection, a second clamping mechanism 20 is provided at the end of the ultrasonic automatic flaw detector 30. A clamping mechanism 20 is provided at both the front and rear ends of the ultrasonic automatic flaw detector 30, which can make the steel pipe more stable during flaw detection, thus making the flaw detection more accurate.

[0036] To achieve automatic feeding of steel pipes, an automatic feeding mechanism 40 is provided on one side of the feeding mechanism 10. The automatic feeding mechanism 40 includes a feeding frame 41, which is a frame structure. A drive shaft 42 is provided at the output end of the feeding frame 41, and the drive shaft 42 is fixedly connected to...

[0037] The feeding frame 41 is composed of five parallel frames arranged vertically to the ground at equal intervals, connected by horizontal beams. The upper surface of the vertical frame of the feeding frame 41 has a horizontal second guide surface 41b from the input end to the output end and a smoothly transitioned downward first guide surface 41a. This allows the steel pipes to be stacked on the second guide surface 41b. Then, the intermittent feeding assembly transports the steel pipes from the second guide surface 41b to the first guide surface 41a. The first guide surface 41a then rolls to the turntable 43 for feeding. The steel pipes can roll along the first guide surface 41a to the turntable 43 and enter the groove 43a. The output end of the feeding frame 41 has 44 parallel turntables 43 placed at equal intervals. Each turntable 43 has three grooves 43a arranged in a circular array. The grooves 43a on the four turntables 43 are arranged side by side. The grooves 43a are arc-shaped and can form an effective interface structure to transport the steel pipes.

[0038] To control the number of steel pipes moving from the second guide surface 41b to the first guide surface 41a, and to ensure orderly movement of the steel pipes, an intermittent feeding assembly is provided at the position of the feeding frame 41 corresponding to the connection between the first guide surface 41a and the second guide surface 41b. The intermittent feeding assembly includes a rotating shaft 49, on which four equally spaced baffles 46 are arranged side by side. Two side by side rotating arms 48 are also fixedly connected to the rotating shaft 49. Each rotating arm 48 is hinged to the front end of the piston rod of a feeding cylinder 45. The base of each feeding cylinder 45 is hinged to the feeding frame 41. By extending and retracting the piston rod of the feeding cylinder 45, the baffles 46 can form a limiting block on the steel pipes. Alternatively, the baffles 46 can be rotated to a position lower than the guide surface of the feeding frame 41, allowing the steel pipes to move from the second guide surface 41b to the first guide surface 41a.

[0039] The intermittent feeding assembly can also be driven by a hydraulic cylinder, with the baffle 46 fixedly installed on the piston rod of the hydraulic cylinder, and the hydraulic cylinder piston rod extending and retracting to form a limit.

[0040] In order to make the structure of the baffle 46 reasonable and able to bear the weight of the steel pipe, the baffle is a fan-shaped baffle 46, and a fan-shaped plastic block 47 is also fixedly connected to the baffle 46 to prevent scratches and damage to the surface of the steel pipe during intermittent feeding.

[0041] like Figure 2As shown, to allow the steel pipe to slide down the second guide surface 41b, a lifting assembly is provided on the loading frame 41 below the second guide surface 41b. The lifting assembly includes a lifting frame 410, which is composed of four right-angled triangular frames arranged perpendicular to the ground at equal intervals, connected by a horizontal connecting beam. One right-angled side of each right-angled triangular frame is parallel to the second guide surface 41b. The connecting end of the right-angled side and the hypotenuse of the lifting frame 410 is hinged to the loading frame 41 at the position corresponding to the connection between the first guide surface 41a and the second guide surface 41b. Two worm gear boxes 411 are provided below the lifting frame 410. The base of each worm gear box 411 is hinged to the loading frame 41. Each worm gear box 411 has a coaxial internal threaded hole on its worm wheel and is threaded to a lead screw 411a. The upper end of the lead screw 411a is hinged to the lifting frame 410. The worms of the two worm gear boxes 411 are connected in series through a transmission rod 414 to form synchronous movement. One end of the transmission rod 414 is connected to the output shaft of the second motor. The second motor 412 is fixed on the loading frame 41.

[0042] The lifting assembly can also be driven by a hydraulic cylinder, which drives the lifting frame 410 to push the steel pipe from the second guide surface 41b to the first guide surface 41a.

[0043] like Figure 4 As shown, in order to enable the first guide surface 41a and the second guide surface 41b to play a better guiding role and at the same time avoid contact friction between the steel pipe and the frame, guide rails 413 are fixedly connected to the first guide surface 41a and the second guide surface 41b of the feeding frame 41.

[0044] The working principle of this mechanism is as follows: bundled steel pipes are hoisted onto the guide rail 413 of the second guide surface 41b. The feeding cylinder 45 is in the extended state, and the steel pipes are restricted on the guide rail 413 of the second guide surface 41b by the baffle 46. When the piston rod of the feeding cylinder 45 retracts, the baffle 46 releases the restriction, and the steel pipes slide down along the first guide surface 41a to the position of the turntable 43. Then, the turntable 43 rotates under the drive of the first motor 44 and drives the steel pipes to flip from the feeding frame 41 onto the transmission chain of the annealing furnace. When the steel pipes on the second guide surface 41b can no longer slide down automatically, the second motor 412 drives the lifting frame 410 to rotate around the hinge part through the worm gear box 411 to form an inclined plane and push the steel pipes on the second guide surface 41b down.

[0045] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A steel pipe flaw detection device, characterized in that, The feeding mechanism includes a feeding frame, on which a plurality of feeding wheels are provided at equal intervals along the feeding direction; The feeding mechanism is provided with a clamping mechanism at its end. The clamping mechanism includes a clamping frame. The clamping frame is provided with a lower pressure roller at its front end and a lower pressure roller at its rear end. The clamping platform is provided with an inverted U-shaped housing in the middle. The housing contains a pair of cylinders arranged in a V-shape. The base of each cylinder is hinged to the housing. A pair of fork-shaped hinge arms are provided on the housing below each piston rod. The lowest end of each pair of fork-shaped hinge arms is connected by a first shaft. The two ends of the first shaft are respectively hinged to the corresponding side of the housing. A second shaft is provided in the middle of each pair of fork-shaped hinge arms. An upper pressure roller is provided on the second shaft. A third shaft is provided at the upper end of each pair of fork-shaped hinge arms. The third shaft is hinged to the piston rod of the cylinder on the corresponding side. An ultrasonic automatic flaw detector is provided at the end of the clamping mechanism.

2. The steel pipe flaw detection device according to claim 1, characterized in that, The ultrasonic automatic flaw detector is also equipped with a clamping mechanism at its end.

3. The steel pipe flaw detection device according to claim 1, characterized in that, An automatic feeding mechanism is provided on one side of the feeding mechanism.

4. The steel pipe flaw detection device according to claim 3, characterized in that, The automatic feeding mechanism includes a feeding frame, and a drive shaft is provided on the output end of the feeding frame. One end of the drive shaft is connected to the output shaft of the first motor. At least two coaxial turntables are provided on the drive shaft. Each turntable has at least one groove on its outer circumference. The groove flips the elongated workpiece from the inside of the output end of the feeding frame to the outside of the output end of the feeding frame through the rotation of the turntable.

5. A steel pipe flaw detection device according to claim 4, characterized in that, The upper surface of the frame has a downward first guide surface from the input end to the output end.

6. A steel pipe flaw detection device according to claim 5, characterized in that, The input end of the upper surface of the frame has a horizontal second guide surface that smoothly transitions to the first guide surface.

7. A steel pipe flaw detection device according to claim 6, characterized in that, An intermittent feeding assembly is provided at the frame position corresponding to the connection between the first guide surface and the second guide surface.

8. A steel pipe flaw detection device according to claim 7, characterized in that, The intermittent feeding assembly includes a rotating shaft with at least two baffles and at least two rotating arms fixedly connected to it. Each rotating arm is hinged to the front end of the piston rod of a cylinder, and the base of each cylinder is hinged to the frame.

9. A steel pipe flaw detection device according to claim 6, characterized in that, A lifting assembly is provided on the frame below the second guide surface.

10. A steel pipe flaw detection device according to claim 9, characterized in that, The lifting assembly includes a lifting frame, the horizontal end of which is hinged to the frame position corresponding to the connection between the first guide surface and the second guide surface. At least two worm gear boxes are provided below the lifting frame, and the base of each worm gear box is hinged to the frame. Each worm gear box has a coaxial internal threaded hole on its worm wheel and a lead screw is threadedly connected to it. The upper end of the lead screw is hinged to the lifting frame. The worms of the two worm gear boxes are connected in series through a transmission rod, one end of which is connected to the output shaft of the second motor.

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