Well type flaw detector

Abstract

The utility model relates to the technical field of testing or analyzing materials by an electric or magnetic method, in particular to a well type flaw detector. A well type flaw detection machine comprises an inner barrel, a fixed coil fixedly arranged outside the inner barrel, cross-core magnet yokes arranged on the two sides of the inner barrel in a penetrating mode and connected with the inner barrel in a sliding mode and electrifying rods arranged on the two sides of the inner barrel in a penetrating mode and connected with the inner barrel in a sliding mode, the cross-core magnet yokes are sleeved with cross-core coils, and the electrifying rods are used for abutting against workpieces to be subjected to flaw detection. The cross-core magnet yoke and the cross-core coil are adopted, magnetization of a workpiece with a penetrating hole structure is enhanced, and detection of defects during flaw detection is facilitated; the electrifying rod abuts against the workpiece to electrify the workpiece, so that the precision is high, the sensitivity is high, and the defect detection is facilitated. And the electrode tip adopts the copper woven belt, so that the electrode tip is flatly and compactly propped against the workpiece, the sparking risk is avoided, and the workpiece is not damaged. And a liquid collecting tray is arranged below the inner barrel, so that the magnetic suspension does not leak and can be recycled.

Description

Technical Field

[0001] The present application relates to the technical field of testing or analyzing materials by electrical or magnetic methods, and in particular to a well-type flaw detector. Background Art

[0002] The coupler is a vehicle component used to connect locomotives and vehicles or vehicles, transmit traction and impact force, and keep a certain distance between vehicles. The coupler consists of three parts: the hook head, the hook body, and the hook tail. The rear part of the coupler is called the hook tail, and a vertical flat lock hole is opened on the hook tail to connect with the hook tail frame on the vehicle body buffer structure. Therefore, the hook tail frame is a key part for high-speed load and safe operation of trains.

[0003] For flaw detection of the hook tail frame, some use small portable flaw detectors; some use bed-type hook tail frame magnetic particle flaw detectors; some use well-type flaw detectors. However, small portable flaw detectors have great limitations for flaw detection of special-shaped workpieces; bed-type flaw detectors use circumferential direct power supply, and longitudinal magnetization coil flaw detection often misses the easily damaged sections such as the curved surface inside the hook tail frame; well-type flaw detectors use through-core electrodes to penetrate the hook tail frame to enhance the magnetization magnetic field, and often miss the connection between the hook tail frame and the vertical flat lock hole.

[0004] Therefore, it is necessary to propose a flaw detector that can effectively reduce missed detections in view of the special structure of the hook tail frame. Summary of the invention

[0005] In order to make the flaw detection results at various positions of the workpiece more reliable, the present application provides a well-type flaw detector, which adopts the following technical solution.

[0006] A well-type flaw detector comprises an inner barrel, a fixed coil fixed outside the inner barrel, a through-core yoke penetrating both sides of the inner barrel and slidably connected to the inner barrel, and an energized rod penetrating both sides of the inner barrel and slidably connected to the inner barrel, wherein the through-core yoke is outer-circuited with a through-core coil, and the energized rod is used to press against a workpiece to be inspected.

[0007] Furthermore, the inner barrel is provided with a yoke hole, a rod sleeve is fixedly provided on the outer wall of the inner barrel around the yoke hole, the rod sleeve has a semicircular ring structure, and a tightening cylinder is provided on the inner barrel to match the rod sleeve.

[0008] Furthermore, one end of the through-core magnetic yokes that is away from each other is connected to a through-core cylinder, and one end of the through-core magnetic yokes that is close to each other is plugged in.

[0009] Furthermore, a through-coil is fixedly provided on the inner wall of the inner barrel around the yoke hole.

[0010] Furthermore, an end groove is provided at the end of the through-core magnetic yoke on one side of the inner barrel, and an end protrusion matching the end groove is provided at the end of the through-core magnetic yoke on the other side of the inner barrel.

[0011] Furthermore, the inner barrel is provided with an electricity-passing hole, a rod sleeve is fixedly provided on the barrel wall of the inner barrel around the electricity-passing hole, the rod sleeve has a semicircular ring mechanism, and a tightening cylinder is provided on the inner barrel to match the rod sleeve.

[0012] Furthermore, the ends of the energizing rods that are away from each other are connected to the energizing cylinders, and the ends of the energizing rods that are close to each other are respectively fixed to the electrode heads.

[0013] Furthermore, the fixed coil includes an X-direction coil, a Y-direction coil and a Z-direction coil.

[0014] Furthermore, a liquid spraying pipe is fixedly arranged on the inner wall of the inner barrel, the liquid spraying pipe is connected to the magnetic suspension liquid tank, and a spray head is arranged on the liquid spraying pipe.

[0015] Furthermore, a liquid collecting tray is provided below the inner barrel, and the liquid collecting tray is connected to the magnetic suspension tank.

[0016] In summary, the present application includes at least one of the following beneficial technical effects.

[0017] 1. The present application adopts a through-core magnetic yoke and a through-core coil, which can enhance the magnetization of a workpiece with a penetrating hole structure, facilitate the detection of defects during flaw detection, and minimize the occurrence of missed detection.

[0018] 2. The present application adopts a current-carrying rod to press against the workpiece and energize the workpiece. This contact-type current-carrying flaw detection has high precision and high sensitivity, which is conducive to the detection of defects.

[0019] 3. The electrode head of the present application adopts a copper braided belt, which is a soft material, so that the electrode head can be flatly and tightly abutted against the workpiece without the risk of sparking and without damaging the surface of the workpiece.

[0020] 4. A liquid collecting tray covering the cross-sectional area of ​​the inner barrel is provided under the inner barrel of the present application, and the liquid collecting tray is connected to the magnetic suspension tank to prevent the magnetic suspension from leaking and to enable recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the hook tail frame structure diagram.

[0022] Figure 2 This is an overall diagram of the well-type flaw detector in use.

[0023] Figure 3 This is a partial structural diagram of the flaw detector highlighting the yoke hole and electrode hole.

[0024] Figure 4It is a schematic diagram of the main structure of the hook tail frame flaw detection.

[0025] Figure 5 It is a partial structural diagram of the flaw detector highlighting the position of the through-coil.

[0026] Figure 6 This is a diagram of the fixed coil distribution structure.

[0027] Figure 7 This is a simplified diagram of the magnetic suspension circulation structure of the flaw detector.

[0028] Description of reference numerals:

[0029] 1. Hook tail frame; 11. Frame wall; 12. Pin hole; 2. Fixed coil; 21. Y-direction coil; 22. X-direction coil; 23. Z-direction coil; 31. Power cylinder; 32. Power rod; 33. Electrode head; 41. Through-core cylinder; 42. Through-core magnetic yoke; 43. End groove; 44. End protrusion; 45. Through-core coil; 51. Spray pipe; 52. Spray head; 53. Liquid collecting tray; 54. Suspension outlet pipe; 55. Suspension inlet pipe; 56. Magnetic suspension box; 61. Inner barrel; 62. Tightening cylinder; 63. Rod sleeve; 64. Yoke hole; 65. Electrode hole; 7. Shell. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0031] The present application discloses a well-type flaw detector for flaw detection of a workpiece having a hole penetrating the whole workpiece. Figure 1 As shown, the workpiece to be inspected in this embodiment is a hook tail frame 1, which has two frame walls 11 parallel to each other, and a pin hole 12 penetrating the entire frame is provided perpendicular to the frame wall 11.

[0032] Reference Figure 2 The well-type flaw detector is provided with a shell 7, which is made of metal material. An inner barrel 61 is fixed to the shell 7. The inner barrel 61 is in the shape of a quadrangular prism with four walls surrounding it and openings at the top and bottom. A hoist is provided above the flaw detector, and the workpiece is vertically suspended to realize the loading and unloading of the workpiece, which also matches the well-type structure of the flaw detector. The wall of the inner barrel 61 is made of insulating material. A fixed coil 2 is provided outside the inner barrel 61, and the fixed coil 2 matches the outer shape of the inner barrel 61 as a whole. A spray mechanism is fixed on the inner wall of the inner barrel 61.

[0033] Reference Figure 3 A yoke hole 64 and an electrode hole 65 are provided on one side wall of the inner barrel 61 in the vertical direction, and a yoke hole 64 and an electrode hole 65 are also provided on the side wall opposite to this side wall. The positions of the yoke holes 64 on the two side walls correspond to each other, and the positions of the electrode holes 65 on the two side walls correspond to each other.

[0034] Reference Figure 3 and Figure 4 A through-core cylinder 41 is fixedly provided at a position of the housing 7 corresponding to the yoke hole 64, and a through-core yoke 42 is fixedly connected to the piston end of the through-core cylinder 41. An end groove 43 is provided at the end of the through-core yoke 42 on one side, and an end protrusion 44 is provided at the end of the through-core yoke 42 on the other side, and the end protrusion 44 can be inserted into the end groove 43. That is, the through-core yoke 42 is connected to the through-core cylinder 41 at one end away from each other, and the through-core yoke 42 is plugged at the end close to each other. The piston end of the through-core cylinder 41 extends to drive the yoke to pass through the pin hole 12 of the hook tail frame 1, and the end protrusion 44 in the hook tail frame 1 is inserted into the end groove 43.

[0035] A rod sleeve 63 is fixedly provided on the outer wall of the inner barrel 61 around the yoke hole 64. The rod sleeve 63 facilitates the penetration of the through-core yoke 42. The side of the rod sleeve 63 away from the yoke hole 64 is set as a semi-annular structure, which abuts against the through-core yoke 42. A tightening cylinder 62 is also fixedly provided on the outer wall of the inner barrel 61 corresponding to the yoke hole 64. The end of the piston rod of the tightening cylinder 62 is fixedly connected with a semi-annular structure for matching with the semi-annular structure of the rod sleeve 63. When the end of the piston rod of the tightening cylinder 62 moves, it can tighten the through-core yoke 42 therein.

[0036] Reference Figure 3 and Figure 4 The housing 7 is fixedly provided with a power cylinder 31 at a position corresponding to the electrode hole 65. The piston end of the power cylinder 31 is fixedly connected with a power rod 32. The end of the power rod 32 away from the power cylinder 31 is fixedly provided with an electrode head 33. The electrode head 33 is made of a copper braided belt and is soft. The piston end of the power cylinder 31 extends out to drive the electrode head 33 of the power rod 32 to approach the hook tail frame 1 until the electrode head 33 presses the frame wall 11 of the hook tail frame 1 tightly. After pressing, the power rod 32 is energized, so that the hook tail frame 1 is energized, and flaw detection begins.

[0037] A rod sleeve 63 is also fixedly provided on the outer wall of the inner barrel 61 around the electrode hole 65. The rod sleeve 63 is convenient for the current rod 32 to pass through. The side of the rod sleeve 63 away from the electrode hole 65 is set as a semi-annular structure, which abuts against the current rod 32. A tightening cylinder 62 is also fixedly provided on the outer wall of the inner barrel 61 around the current rod 32. The end of the piston rod of the tightening cylinder 62 is fixedly connected with a semi-annular structure for matching with the semi-annular structure of the rod sleeve 63. When the end of the piston rod of the tightening cylinder 62 moves, it can tighten the current rod 32 therein.

[0038] Reference Figure 5 A through-coil 45 is fixedly provided on the inner wall of the inner barrel 61 around the yoke hole 64 . The through-coil 45 is in a “U” shape, and the through-coil 45 can pass through the through-coil 45 .

[0039] Reference Figure 6The fixed coil 2 is an energized coil group, including an X-direction coil 22, a Y-direction coil 21 and a Z-direction coil 23, which magnetize the hook body after being energized. The magnetized coils that cross each other in appearance are connected to alternating currents with different phases respectively, producing a periodic rotating magnetic field whose direction changes continuously with time, ensuring that defects in any direction of the workpiece inspection part can obtain a higher detection sensitivity. For flaw detection of the hook tail frame 1, in addition to the fixed coil 2, the through-core yoke 42 is driven by the through-core cylinder 41 to pass through the pin hole 12 of the hook tail frame 1 through the hole reserved on the inner barrel 61, and the tightening cylinders 62 on both sides press the two yokes into contact, and the through-core coil 45 is energized to generate a strong magnetic field to complete the flaw detection operation.

[0040] Reference Figure 7 and Figure 2 The lower part of the outer wall of the inner barrel 61 is provided with a suspension inlet pipe 55 and a suspension outlet pipe 54, the suspension inlet pipe 55 is connected to the spray pipe 51 and then connected to the suspension outlet pipe 54, and a spray head 52 is fixed on the spray pipe 51. The suspension outlet pipe 54 passes through the lower part of the outer wall of the inner barrel 61, and the suspension inlet pipe 55 and the suspension outlet pipe 54 are both connected to the magnetic suspension tank 56.

[0041] A liquid collecting tray 53 covering the cross-sectional area of ​​the inner barrel 61 is provided below the inner barrel 61. The liquid collecting tray 53 is funnel-shaped. A magnetic suspension tank 56 is provided below the liquid collecting tray 53. The outlet of the liquid collecting tray 53 is connected to the magnetic suspension tank 56 for collecting the magnetic suspension for recycling.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A well-type flaw detector, characterized in that: The invention comprises an inner barrel (61), a fixed coil (2) fixedly arranged outside the inner barrel (61), a through-core magnetic yoke (42) penetrating both sides of the inner barrel (61) and slidably connected to the inner barrel (61), and an energizing rod (32) penetrating both sides of the inner barrel (61) and slidably connected to the inner barrel (61), wherein the through-core magnetic yoke (42) is provided with a through-core coil (45) on its outer shell, and the energizing rod (32) is used to press against a workpiece to be inspected.

2. A well-type flaw detector according to claim 1, characterized in that: The inner barrel (61) is provided with a yoke hole (64), a rod sleeve (63) is fixedly provided on the outer wall of the inner barrel (61) around the yoke hole (64), the rod sleeve (63) has a semicircular ring structure, and a tightening cylinder (62) is provided on the inner barrel (61) to match the rod sleeve (63).

3. A well-type flaw detector according to claim 2, characterized in that: The ends of the through-core magnetic yokes (42) that are away from each other are connected to a through-core cylinder (41), and the ends of the through-core magnetic yokes (42) that are close to each other are plugged in.

4. A well-type flaw detector according to claim 2, characterized in that: A through-coil (45) is fixedly provided on the inner wall of the inner barrel (61) around the yoke hole (64).

5. A well-type flaw detector according to claim 3, characterized in that: An end groove (43) is provided at the end of the through-core magnetic yoke (42) on one side of the inner barrel (61), and an end protrusion (44) matching the end groove (43) is provided at the end of the through-core magnetic yoke (42) on the other side of the inner barrel (61).

6. A well-type flaw detector according to claim 1, characterized in that: The inner barrel (61) is provided with an electric conduction hole, a rod insertion sleeve (63) is fixedly provided on the barrel wall of the inner barrel (61) around the electric conduction hole, the rod insertion sleeve (63) has a semicircular ring mechanism, and a tightening cylinder (62) is provided on the inner barrel (61) to match the rod insertion sleeve (63).

7. A well-type flaw detector according to claim 6, characterized in that: The ends of the energizing rods (32) that are away from each other are connected to the energizing cylinder (31), and the ends of the energizing rods (32) that are close to each other are respectively fixedly connected to electrode heads (33).

8. A well-type flaw detector according to claim 1, characterized in that: The fixed coil (2) comprises an X-direction coil (22), a Y-direction coil (21) and a Z-direction coil (23).

9. A well-type flaw detector according to claim 1, characterized in that: A liquid spraying pipe (51) is fixedly arranged on the inner wall of the inner barrel (61), the liquid spraying pipe (51) is connected to a magnetic suspension liquid tank (56), and a spray head (52) is arranged on the liquid spraying pipe (51).

10. A well-type flaw detector according to claim 9, characterized in that: A liquid collecting tray (53) is provided below the inner barrel (61), and the liquid collecting tray (53) is connected to the magnetic suspension tank (56).

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