A detection clamp for metal ring, magnetic particle detector and magnetic particle detection method

Abstract

The present invention discloses a detection clamp for metal rings, a magnetic particle detector and a magnetic particle detection method, which relate to the technical field of magnetic particle detection, and include an electromagnetic suction block and a left clamping rod and a right clamping rod. The electromagnetic suction block generates magnetism when it is energized, driving the left clamping rod and the right clamping rod to clamp the metal ring to be detected by magnetic particle, and can automatically clamp and fix large metal rings for magnetization and magnetic particle detection, without manual operation, greatly reducing labor intensity. The electromagnetic suction block generates magnetism when it is energized, attracting the left clamping rod and the right clamping rod to close and clamp, and this method can ensure that the right clamping rod that does not touch the metal ring continues to move while the left clamping rod touches the metal ring, until the right clamping rod also touches the metal ring, and vice versa. It can be seen that this clamping method can reduce the positioning requirements for large metal rings, and large metal rings do not need to be moved frequently for positioning, reducing the labor intensity of the staff.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic powder detection, and in particular to a detection clamp for metal rings, a magnetic powder detector and a magnetic powder detection method. Background Art

[0002] In the wind power industry, large metal rings are prone to cracks and other defects (such as welding, heat treatment, machining, grinding, forging, casting, straightening and loading). To ensure the quality of metal rings, most of them need to undergo magnetic particle testing.

[0003] The process of magnetic particle inspection is to first magnetize the metal ring, then apply magnetic suspension, and finally observe. Specifically, the magnetization process of the metal ring is to contact the two poles of the electromagnetic yoke or permanent yoke with the metal ring to form a closed magnetic circuit, so as to magnetize it longitudinally as a whole (refer to a magnetic particle inspection device and magnetic particle inspection method for ring parts disclosed in CN111505111A).

[0004] Applying magnetic suspension is a step after the metal ring is magnetized. Magnetic suspension refers to 1~10μm magnetic powder suspended in oil or water, which is applied to the metal ring by pouring, dipping or spraying.

[0005] Observation refers to irradiating the metal ring with light and observing the magnetic traces formed on the surface of the metal ring with the naked eye or by photographing.

[0006] Magnetic traces are generated because after the metal ring is magnetized, if its interior is uniform, the magnetic lines of force are parallel. However, if the metal ring has defects such as cracks, the defects are non-magnetic and have large magnetic resistance. When they are close to or located on the surface of the metal ring, the magnetic lines of force will bend and distribute in the air, forming a local magnetic field, also called leakage magnetic field. The existence of leakage magnetic field will attract nearby magnetic powder, thereby forming magnetic traces and showing the shape of the defect.

[0007] In the prior art, it is difficult to magnetize large metal rings in the wind power industry for the following reasons:

[0008] The diameter of the large metal ring exceeds 2 meters, and the wall thickness of the ring is about 15 centimeters, which makes the conductive detection clamp larger (refer to the structure of the conductive clamp disclosed in CN111505111A), resulting in the workers having to expend greater physical strength to fix the conductive detection clamp on the left and right sides of the metal ring. The labor intensity of the workers is high, which affects the efficiency of magnetic particle detection. Summary of the invention

[0009] One of the purposes of the present invention is to solve the problem that in the prior art, before magnetizing large metal rings in the wind power industry, workers need to consume a lot of labor, thereby affecting the efficiency of magnetic powder detection.

[0010] A second object of the present invention is to provide a magnetic particle detector.

[0011] A third object of the present invention is to provide a magnetic particle detection method.

[0012] In order to achieve one of the above-mentioned purposes, the present invention adopts the following technical solution: a detection clamp for metal rings, comprising a shell, one side of the shell is slidably connected to a left iron slider, the other side of the shell is slidably connected to a right iron slider, and a left clamping rod and a right clamping rod are extended under the shell, the left clamping rod is fixedly connected to the left iron slider, and the right clamping rod is fixedly connected to the right iron slider.

[0013] A reaction component is fixed in the shell, and the reaction component is located between the left iron slider and the right iron slider. Spring parts are provided between the reaction component and the left iron slider, and between the reaction component and the right iron slider. Electromagnetic attraction blocks are provided on both sides of the reaction component. When the electromagnetic attraction blocks are energized, magnetism is generated to attract the left iron slider and the right iron slider to move closer to the reaction component.

[0014] The left clamping rod is provided with a conductive coil, and the right clamping rod is made of a non-conductive material or is covered with an insulating sleeve, so as to avoid electrical contact between the right clamping rod and the metal ring, and realize unilateral electrification of the detection clamp.

[0015] In the above technical solution, when the embodiment of the present invention is used, the electromagnetic attraction block of the reaction component is energized to cause the electromagnetic attraction block to generate magnetism, attract the left iron slider and the right iron slider to approach the electromagnetic attraction block, and then drive the left clamping rod and the right clamping rod to clamp the metal ring, and at the same time the spring part is compressed. Then, the conductive coil of the left clamping rod is energized through an external power supply to magnetize the metal ring to form a closed magnetic circuit. In order to perform magnetic powder detection, when the detection is completed, stop energizing the electromagnetic attraction block, and the left clamping rod and the right clamping rod are reset under the action of the spring part.

[0016] Furthermore, in an embodiment of the present invention, a thread groove is formed on the outer surface of the left clamping rod, and the conductive coil is embedded in the thread groove, so as to avoid hard contact between the conductive coil and the metal ring, thereby preventing the conductive coil from being damaged.

[0017] Furthermore, in an embodiment of the present invention, guide rods are provided on both sides of the reaction assembly, the guide rod on the left side extends into the sliding opening of the left iron slider for sliding connection, and the guide rod on the right side extends into the sliding opening of the right iron slider for sliding connection. When the left iron slider and the right iron slider are close to each other;

[0018] Furthermore, in an embodiment of the present invention, the conductive coil is electrically connected to an external power source via a conductive lead wire, and the electromagnetic attraction blocks on both sides of the reaction component are electrically connected via a conductive rod, and the conductive rod is electrically connected to the external power source.

[0019] Furthermore, in an embodiment of the present invention, the conductive rod is externally coated with an insulating tube, and the electromagnetic attraction blocks on both sides of the reaction component are attached to the insulating tube.

[0020] Furthermore, in an embodiment of the present invention, an opening is provided at the bottom of the shell, a floating plate is slidably arranged in the opening, a magnet is arranged under the floating plate, and an elastic member is arranged between the floating plate and the step on the side of the opening.

[0021] A reset electromagnet is also provided in the opening. The reset electromagnet is located above the floating plate and is connected to the external power supply.

[0022] A sliding rod is slidably connected in the sliding cavity on the opening side, and the head end of the sliding rod extends into the opening. A magnet is installed on the head end of the sliding rod. When the reset electromagnet is energized to generate magnetism, the reset electromagnet repels the magnet.

[0023] A boss is provided at the edge of the floating plate, and the boss is embedded between the reset electromagnet and the magnet. A pre-stretched tension spring is installed between the slide bar and the slide cavity, and the boss abuts against the magnet at the head end of the slide bar.

[0024] An insulating pad is installed at the tail end of the sliding rod, and a conductive ring is sleeved on the outer surface of the insulating pad. An electric bullet is installed on the sliding cavity, and a charged bullet is installed under the sliding cavity. The electric bullet is electrically connected to the conductive rod, and the charged bullet is electrically connected to the external power supply.

[0025] A gap is reserved between the charged bullet and the powered bullet, and the slide rod passes through the gap. When the slide rod moves to the right, the conductive ring at the tail end of the slide rod contacts the charged bullet and the powered bullet, so that the charged bullet and the powered bullet are electrically connected, thereby enabling the external power supply to supply power to the conductive rod and the electromagnetic attraction block.

[0026] The beneficial effects of the present invention are:

[0027] The advantage of the present invention is that by energizing the electromagnetic attraction block of the metal ring detection clamp, the left clamping rod and the right clamping rod can be driven to clamp the metal ring to be detected by magnetic powder. Large metal rings can be automatically clamped and fixed for magnetization and magnetic powder detection without manual operation, which greatly reduces labor intensity.

[0028] Another advantage of the present invention is that the electromagnetic attraction block generates magnetism when it is energized, attracting the left clamping rod and the right clamping rod to close and clamp. This method can ensure that the right clamping rod that has not touched the metal ring continues to move while the left clamping rod touches the metal ring, until the right clamping rod also touches the metal ring, and vice versa. It can be seen that this clamping method can reduce the positioning requirements for large metal rings. Large metal rings do not need to be moved frequently for positioning, which reduces the labor intensity of the staff.

[0029] In order to achieve the second of the above-mentioned purposes, the present invention adopts the following technical scheme: a magnetic particle detector, which has the metal ring detection clamp described in one of the above-mentioned invention purposes, and the metal ring detection clamps are provided with two. The metal ring to be magnetically detected is clamped by the two metal ring detection clamps so as to magnetize the metal ring to form a closed magnetic circuit.

[0030] Furthermore, in an embodiment of the present invention, the magnetic particle detector also has a lifting device, a lifting rod is installed on the shell of the metal ring detection clamp, the lifting device is connected to the lifting rod, and the lifting device drives the lifting rod and the shell to move up and down.

[0031] In order to achieve the third objective, the present invention adopts the following technical solution: a magnetic particle detection method, which is based on the magnetic particle detector described in the second objective of the invention, and comprises the following steps:

[0032] After the metal ring is placed on the insulating platform, start the lifting devices on both sides of the magnetic particle detector to push the metal rings on both sides of the magnetic particle detector down with the detection clamp until the vertical wall of the metal ring is located between the left clamping rod and the right clamping rod under the shell.

[0033] Then, the electromagnetic attraction block of the reaction component is energized through an external power supply, causing the electromagnetic attraction block to generate magnetism, attracting the left iron slider and the right iron slider to move closer to the electromagnetic attraction block, thereby driving the left clamping rod and the right clamping rod to clamp the metal ring, and at the same time the spring part is compressed.

[0034] Then, the conductive coil of the left clamping rod is energized through an external power source to magnetize the metal ring and form a closed magnetic circuit.

[0035] While the metal ring is magnetized, magnetic suspension is applied. The power-on time for each magnetization is 0.5-2 seconds, the magnetization interval time does not exceed 1 second, and the magnetization is stopped 1 second after the application of magnetic suspension is stopped.

[0036] Then, the electromagnetic attraction block is powered off, and the left iron slider and the right iron slider are reset under the action of the spring member.

[0037] Finally, observe whether there are concentrated magnetic marks on the surface of the metal ring.

[0038] Further, in the embodiment of the present invention, in the above steps, after the metal ring is lowered with the detection clamp, the specific process of the external power supply energizing the electromagnetic attraction block is as follows: when the magnet in the opening at the bottom of the shell is attracted by the metal ring, the floating plate is pulled downward, the elastic part is compressed, the boss of the floating plate no longer presses against the magnet at the head end of the slide bar, the pre-stretched tension spring contracts, the slide bar is pulled sideways, and the magnet approaches the reset electromagnet. After the slide bar moves sideways, the conductive ring at the tail end of the slide bar is prompted to contact the charged bullet head and the powered bullet head, so that the external power supply supplies power to the electromagnetic attraction block through the electrical connection between the charged bullet head and the powered bullet head, and at the same time, the lifting device stops.

[0039] When the magnetization of the metal ring is completed, the reset electromagnet is energized to generate magnetism, discharge the dust magnet, and cause the slide bar to reset. Then the lifting device is started to pull the metal ring to reset it with the detection clamp. The magnet under the floating plate is not affected by the metal ring and is re-embedded between the reset electromagnet and the magnet to resist the magnet. After that, the reset electromagnet is stopped from being energized. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic structural diagram of a detection clamp for metal rings according to an embodiment of the present invention.

[0041] Figure 2 for Figure 1 A local enlarged schematic diagram of point A.

[0042] Figure 3 Schematic diagram of the clamping effect of the detection clamp for metal rings according to an embodiment of the present invention.

[0043] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B.

[0044] 10. Shell, 11. Left iron slider, 12. Right iron slider, 13. Left clamping rod, 14. Right clamping rod, 15. Insulating sleeve, 16. Conductive coil, 161. Conductive lead wire, 17. Lifting rod, 18. Opening, 19. Reset solenoid;

[0045] 20. reaction assembly, 21. electromagnetic attraction block, 22. guide rod, 23. spring member, 24. conductive rod, 25. insulating cylinder;

[0046] 30. floating plate, 31. magnet, 32. spring, 33. boss;

[0047] 40. Sliding rod, 41. Tension spring, 42. Magnet, 43. Insulating pad, 44. Conductive ring, 45. Electric warhead, 46. Charged warhead. DETAILED DESCRIPTION

[0048] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] For the purpose of simplicity and illustration, the principles of the embodiments are described mainly by reference to examples. In the following description, many specific details are presented to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, well-known magnetic particle detection methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other. Example 1

[0052] It should be noted that the drawings in the specification are the contents of the specification. The structural shapes, connection relationships, matching relationships, and positional relationships that can be obtained without any doubt in the drawings in the specification should be understood as the contents of the specification.

[0053] A metal ring detection clamp, such as Figure 1As shown, it includes a shell 10, one side of the shell 10 is slidably connected to a left iron slider 11, and the other side of the shell 10 is slidably connected to a right iron slider 12. There are extended left clamping rod 13 and right clamping rod 14 under the shell 10, the left clamping rod 13 is fixedly connected to the left iron slider 11, and the right clamping rod 14 is fixedly connected to the right iron slider 12.

[0054] A reaction component 20 is fixed in the shell 10. The reaction component 20 is located between the left iron slider 11 and the right iron slider 12. Spring components 23 are provided between the reaction component 20 and the left iron slider 11, and between the reaction component 20 and the right iron slider 12. Electromagnetic attraction blocks 21 are provided on both sides of the reaction component 20. When the electromagnetic attraction blocks 21 are energized, magnetism is generated to attract the left iron slider 11 and the right iron slider 12 to move closer to the reaction component 20.

[0055] The left clamping rod 13 is provided with a conductive coil 16, and the right clamping rod 14 is made of a non-conductive material or is covered with an insulating sleeve 15. The right clamping rod 14 is prevented from being in electrical contact with the metal ring, so that the detection clamp is energized on one side.

[0056] Implementation principle:

[0057] like Figure 3 As shown, the electromagnetic attraction block 21 of the reaction component 20 is energized to cause the electromagnetic attraction block 21 to generate magnetism, attracting the left iron slider 11 and the right iron slider 12 to approach the electromagnetic attraction block 21, thereby driving the left clamping rod 13 and the right clamping rod 14 to clamp the metal ring, and at the same time the spring member 23 is compressed. Then, the conductive coil 16 of the left clamping rod 13 is energized through an external power supply to magnetize the metal ring to form a closed magnetic circuit. In order to perform magnetic particle detection, when the detection is completed, stop energizing the electromagnetic attraction block 21, and the left clamping rod 13 and the right clamping rod 14 are reset under the action of the spring member 23.

[0058] The advantage of the present invention is that by energizing the electromagnetic attraction block 21 of the metal ring detection clamp, the left clamping rod 13 and the right clamping rod 14 can be driven to clamp the metal ring to be magnetic powder detected. Large metal rings can be automatically clamped and fixed for magnetization and magnetic powder detection without manual operation, thereby greatly reducing labor intensity.

[0059] Another advantage of the present invention is that the electromagnetic attraction block 21 generates magnetism when it is powered on, attracting the left clamping rod 13 and the right clamping rod 14 to close and clamp. This method can ensure that the right clamping rod 14 that has not touched the metal ring continues to move while the left clamping rod 13 touches the metal ring, until the right clamping rod 14 also touches the metal ring, and vice versa. It can be seen that this clamping method can reduce the positioning requirements for large metal rings. Large metal rings do not need to be moved frequently for positioning, which reduces the labor intensity of the staff.

[0060] Specifically, Figure 1 As shown, the outer surface of the left clamping rod 13 is provided with a thread groove, and the conductive coil 16 is embedded in the thread groove to avoid the conductive coil 16 from being in hard contact with the metal ring and damaging the conductive coil 16.

[0061] Specifically, Figure 1 As shown, guide rods 22 are provided on both sides of the reaction assembly 20, the left guide rod 22 extends into the sliding opening of the left iron slider 11 for sliding connection, and the right guide rod 22 extends into the sliding opening of the right iron slider 12 for sliding connection. When the left iron slider 11 and the right iron slider 12 are close to each other;

[0062] Specifically, Figure 1 As shown, the conductive coil 16 is electrically connected to an external power source (not shown) through a conductive lead wire 161, and the electromagnetic attraction blocks 21 on both sides of the reaction component 20 are electrically connected through a conductive rod 24, and the conductive rod 24 is electrically connected to the external power source.

[0063] More specifically, if Figure 1 As shown, the conductive rod 24 is covered with an insulating tube 25 , and the electromagnetic attraction blocks 21 on both sides of the reaction component 20 are attached to the insulating tube 25 .

[0064] More specifically, if Figure 1 , Figure 2 As shown, an opening 18 is provided at the bottom of the housing 10 , a floating plate 30 is slidably disposed in the opening 18 , a magnet 31 is disposed under the floating plate 30 , and an elastic member is disposed between the floating plate 30 and a step on the side of the opening 18 .

[0065] A reset solenoid 19 is also disposed in the opening 18 . The reset solenoid 19 is located on the floating plate 30 , and the reset solenoid 19 is connected to an external power source.

[0066] A slide rod 40 is slidably connected in the slide cavity on the side of the opening 18 , and the head end of the slide rod 40 extends into the opening 18 . A magnet 42 is installed at the head end of the slide rod 40 . When the reset electromagnet 19 is energized to generate magnetism, the reset electromagnet 19 repels the magnet 42 .

[0067] A boss 33 is provided on the edge of the floating plate 30 , and the boss 33 is embedded between the reset electromagnet 19 and the magnet 42 . A pre-stretched tension spring 41 is installed between the slide rod 40 and the slide cavity, and the boss 33 abuts against the magnet 42 at the head end of the slide rod 40 .

[0068] An insulating pad 43 is installed at the tail end of the slide rod 40, and a conductive ring 44 is sleeved on the outer surface of the insulating pad 43. An electric bullet 45 is installed on the slide cavity, and a charged bullet 46 is installed under the slide cavity. The electric bullet 45 is electrically connected to the conductive rod 24, and the charged bullet 46 is electrically connected to an external power supply.

[0069] A gap is reserved between the charged bullet 46 and the powered bullet 45, and the slide bar 40 passes through the gap. When the slide bar 40 moves to the right, the conductive ring 44 at the tail end of the slide bar 40 contacts the charged bullet 46 and the powered bullet 45, so that the charged bullet 46 and the powered bullet 45 are electrically connected, thereby enabling the external power supply to supply power to the conductive rod 24 and the electromagnetic attraction block 21.

[0070] Implementation principle:

[0071] like Figure 4 As shown, after the metal ring is lowered with the detection clamp, the specific process of the external power supply to energize the electromagnetic attraction block 21 is as follows: when the magnet 31 in the opening 18 at the bottom of the housing 10 is attracted by the metal ring, the floating plate 30 is pulled downward, the elastic part is compressed, and the boss 33 of the floating plate 30 no longer presses against the magnet 42 at the head end of the slide bar 40, and the pre-stretched tension spring 41 contracts, pulling the slide bar 40 to move sideways, and the magnet 42 is close to the reset electromagnet 19. After the slide bar 40 moves sideways, the conductive ring 44 at the tail end of the slide bar 40 is prompted to contact the charged bullet 46 and the power-connected bullet 45, so that the external power supply supplies power to the electromagnetic attraction block 21 through the electrical connection between the charged bullet 46 and the power-connected bullet 45, and at the same time, the lifting device stops.

[0072] When the magnetization of the metal ring is completed, the reset electromagnet 19 is energized to generate magnetism, remove the dust magnet 42, and prompt the slide bar 40 to reset. Then the lifting device is started to pull the metal ring to reset with the detection clamp. The magnet 31 under the floating plate 30 is not affected by the metal ring and is re-embedded between the reset electromagnet 19 and the magnet 42, pressing against the magnet 42. After that, the reset electromagnet 19 is stopped from being energized.

[0073] When the metal ring detection clamp approaches the metal ring, the present invention can automatically connect the electromagnetic suction block 21 to achieve clamping. After the metal ring detection clamp approaches the metal ring, the electromagnetic suction block 21 is powered, and there is no need for staff to wait on site, which reduces the workload of staff. In addition, the scheme is basically composed of a mechanized structure, non-electronic components, and is not afraid of electromagnetic interference (when a large metal ring is magnetized, the magnetic field is very strong). Example 2

[0074] A magnetic particle detector comprises the metal ring detection clamp of the above-mentioned embodiment 1, wherein there are two metal ring detection clamps, and the metal ring to be detected by magnetic particle detection is clamped by the two metal ring detection clamps so as to magnetize the metal ring and form a closed magnetic circuit.

[0075] Specifically, the magnetic particle detector also has a lifting device. A lifting rod 17 is installed on the shell 10 of the metal ring detection clamp. The lifting device is connected to the lifting rod 17. The lifting device drives the lifting rod 17 and the shell 10 to move up and down. Example 3

[0076] A magnetic particle detection method, which is based on the magnetic particle detector of the above embodiment 2, comprises the following steps:

[0077] After the metal ring is placed on the insulating platform, the lifting devices on both sides of the magnetic particle detector are started to push the metal rings on both sides of the magnetic particle detector down with the detection clamp until the vertical wall of the metal ring is located between the left clamping rod 13 and the right clamping rod 14 under the shell 10.

[0078] Then, the electromagnetic attraction block 21 of the reaction component 20 is energized through an external power supply, causing the electromagnetic attraction block 21 to generate magnetism, attracting the left iron slider 11 and the right iron slider 12 to move closer to the electromagnetic attraction block 21, thereby driving the left clamping rod 13 and the right clamping rod 14 to clamp the metal ring, and at the same time the spring member 23 is compressed.

[0079] Then, the conductive coil 16 of the left clamping rod 13 is energized by an external power source to magnetize the metal ring to form a closed magnetic circuit.

[0080] While the metal ring is magnetized, magnetic suspension is applied. The power-on time for each magnetization is 0.5-2 seconds, the magnetization interval time does not exceed 1 second, and the magnetization is stopped 1 second after the application of magnetic suspension is stopped.

[0081] Then, the electromagnetic attraction block 21 is de-energized, and the left iron slider 11 and the right iron slider 12 are reset under the action of the spring member 23 .

[0082] Finally, observe whether there are concentrated magnetic marks on the surface of the metal ring.

[0083] The advantage of the present invention is that by energizing the electromagnetic suction block 21 of the metal ring detection clamp, the left clamping rod 13 and the right clamping rod 14 can be driven to clamp the metal ring to be detected by magnetic powder, and the large metal ring can be automatically clamped and fixed for magnetization and magnetic powder detection without manual operation, which greatly reduces the labor intensity. Large metal rings are not easy to move, and it is difficult to ensure that the center of the vertical wall of the metal ring is exactly located at the center of the left clamping rod 13 and the right clamping rod 14. The present invention uses the electromagnetic suction block 21 to generate magnetic attraction to close the left clamping rod 13 and the right clamping rod 14. While the left clamping rod 13 touches the metal ring, it can ensure that the right clamping rod 14 that has not touched the metal ring continues to move until the right clamping rod 14 also touches the metal ring, and vice versa. It can be seen that this clamping method can reduce the positioning requirements for large metal rings, and large metal rings do not need to be frequently moved for positioning, which reduces the labor intensity of the staff.

[0084] Specifically, in the above steps, after the metal ring is lowered with the detection clamp, the specific process of the external power supply energizing the electromagnetic attraction block 21 is as follows: when the magnet 31 in the opening 18 at the bottom of the housing 10 is attracted by the metal ring, the floating plate 30 is pulled downward, the elastic part is compressed, and the boss 33 of the floating plate 30 no longer presses against the magnet 42 at the head end of the slide bar 40, and the pre-stretched tension spring 41 contracts, pulling the slide bar 40 to move sideways, and the magnet 42 is close to the reset electromagnet 19. After the slide bar 40 moves sideways, the conductive ring 44 at the tail end of the slide bar 40 is prompted to contact the charged bullet 46 and the power-connected bullet 45, so that the external power supply supplies power to the electromagnetic attraction block 21 through the electrical connection between the charged bullet 46 and the power-connected bullet 45, and at the same time, the lifting device stops.

[0085] The external power supply system supplies power to one device (electromagnetic attraction block 21) while the other device (lifting device) stops. This is an existing conventional solution (PLC programming) of the external power supply system and will not be explained in detail.

[0086] When the magnetization of the metal ring is completed, the reset electromagnet 19 is energized to generate magnetism, remove the dust magnet 42, and prompt the slide bar 40 to reset. Then the lifting device is started to pull the metal ring to reset with the detection clamp. The magnet 31 under the floating plate 30 is not affected by the metal ring and is re-embedded between the reset electromagnet 19 and the magnet 42, pressing against the magnet 42. After that, the reset electromagnet 19 is stopped from being energized.

[0087] When the metal ring detection clamp approaches the metal ring, the present invention can automatically connect the electromagnetic suction block 21 to achieve clamping. After the metal ring detection clamp approaches the metal ring, the electromagnetic suction block 21 is powered, and there is no need for staff to wait on site, which reduces the workload of staff. In addition, the scheme is basically composed of a mechanized structure, non-electronic components, and is not afraid of electromagnetic interference (when a large metal ring is magnetized, the magnetic field is very strong).

[0088] It should be noted that applying magnetic suspension and observing magnetic traces are existing mature technologies and will not be explained in detail. Similarly, supplying power to different components (charged bullet 46, conductive coil 16, reset electromagnet 19) at different times through an external power supply is also an existing mature technology and will not be explained in detail.

[0089] Although the above describes the illustrative specific embodiments of the present invention so that those skilled in the art can understand the present invention, the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, all inventions and creations using the concepts of the present invention are protected.

Claims

1. A metal ring detection clamp, characterized in that: It comprises a shell, one side of the shell is slidably connected to a left iron slider, the other side of the shell is slidably connected to a right iron slider, and a left clamping rod and a right clamping rod are extended under the shell, the left clamping rod is fixedly connected to the left iron slider, and the right clamping rod is fixedly connected to the right iron slider; A reaction component is fixed in the shell, and the reaction component is located between the left iron slider and the right iron slider. Spring components are provided between the reaction component and the left iron slider, and between the reaction component and the right iron slider. Electromagnetic attraction blocks are provided on both sides of the reaction component. When the electromagnetic attraction blocks are energized, magnetism is generated to attract the left iron slider and the right iron slider to approach the reaction component. The left clamping rod is provided with a conductive coil, and the right clamping rod is made of a non-conductive material or the right clamping rod is covered with an insulating sleeve; The conductive coil is electrically connected to an external power source through a conductive lead wire, and the electromagnetic attraction blocks on both sides of the reaction component are electrically connected through a conductive rod, and the conductive rod is electrically connected to the external power source; The shell body has an opening at the bottom, a floating plate is slidably arranged in the opening, a magnet is arranged under the floating plate, and an elastic member is arranged between the floating plate and the step on the side of the opening; A reset electromagnetic is also provided in the opening, the reset electromagnetic is located on the floating plate, and the reset electromagnetic is connected to the external power supply; A sliding rod is slidably connected in the sliding cavity on the opening side, the head end of the sliding rod extends into the opening, a magnet is installed on the head end of the sliding rod, and when the reset electromagnetic is energized to generate magnetism, the reset electromagnetic and the magnet repel each other; The floating plate is provided with a boss at the edge, the boss is embedded between the reset electromagnet and the magnet, a pre-stretched tension spring is installed between the slide bar and the slide cavity, and the boss abuts against the magnet at the head end of the slide bar; An insulating pad is installed at the tail end of the sliding rod, a conductive ring is sleeved on the outer surface of the insulating pad, a power-connected bullet is installed on the sliding cavity, and a charged bullet is installed under the sliding cavity. The power-connected bullet is electrically connected to the conductive rod, and the charged bullet is electrically connected to the external power supply; A gap is reserved between the charged bullet and the powered bullet, and the slide rod passes through the gap. When the slide rod moves to the right, the conductive ring at the tail end of the slide rod contacts the charged bullet and the powered bullet, so that the charged bullet and the powered bullet are electrically connected, thereby enabling the external power supply to supply power to the conductive rod and the electromagnetic attraction block.

2. The metal ring detection clamp according to claim 1, characterized in that: A thread groove is formed on the outer surface of the left clamping rod, and the conductive coil is embedded in the thread groove.

3. The metal ring detection clamp according to claim 1, characterized in that: Guide rods are arranged on both sides of the reaction component. The guide rod on the left side extends into the sliding opening of the left iron slider for sliding connection, and the guide rod on the right side extends into the sliding opening of the right iron slider for sliding connection.

4. The metal ring detection clamp according to claim 1, characterized in that: The conductive rod is coated with an insulating tube outside, and the electromagnetic attraction blocks on both sides of the reaction component are attached to the insulating tube.

5. A magnetic particle detector, characterized in that: The magnetic particle detector has a metal ring detection clamp as described in any one of claims 1 to 4, wherein there are two metal ring detection clamps, and the metal ring to be magnetically detected is clamped by the two metal ring detection clamps so as to magnetize the metal ring to form a closed magnetic circuit.

6. The magnetic particle detector according to claim 5, characterized in that: The magnetic particle detector also has a lifting device. A lifting rod is installed on the shell of the metal ring detection clamp. The lifting device is connected to the lifting rod. The lifting device drives the lifting rod and the shell to move up and down.

7. A magnetic particle detection method, characterized in that: The magnetic particle detection method is based on the magnetic particle detector described in claim 6 above, and comprises the following steps: After the metal ring is placed on the insulating platform, the lifting devices on both sides of the magnetic particle detector are started to push the metal rings on both sides of the magnetic particle detector down with the detection clamp until the vertical wall of the metal ring is located between the left clamping rod and the right clamping rod under the shell; Then, the electromagnetic attraction block of the reaction component is energized through an external power supply, causing the electromagnetic attraction block to generate magnetism, attracting the left iron slider and the right iron slider to approach the electromagnetic attraction block, thereby driving the left clamping rod and the right clamping rod to clamp the metal ring, and at the same time the spring part is compressed; Then, the conductive coil of the left clamping rod is energized by an external power source to magnetize the metal ring to form a closed magnetic circuit; While the metal ring is magnetized, magnetic suspension is applied. The power-on time for each magnetization is 0.5-2 seconds, the magnetization interval time does not exceed 1 second, and the magnetization is stopped 1 second after the application of magnetic suspension is stopped; Then, the electromagnetic attraction block is powered off, and the left iron slider and the right iron slider are reset under the action of the spring member; Finally, observe whether there are concentrated magnetic marks on the surface of the metal ring.

8. The magnetic particle detection method according to claim 7, characterized in that: In the above steps, after the metal ring is lowered by the detection clamp, the specific process of the external power supply supplying power to the electromagnetic attraction block is as follows: when the magnet in the opening at the bottom of the shell is attracted by the metal ring, the floating plate is pulled downward, the elastic part is compressed, and the boss of the floating plate no longer presses against the magnet at the head end of the slide bar, the pre-stretched tension spring contracts, pulling the slide bar to move sideways, and the magnet approaches the reset electromagnet. After the slide bar moves sideways, the conductive ring at the tail end of the slide bar is prompted to contact the charged bullet head and the charged bullet head, so that the external power supply supplies power to the electromagnetic attraction block through the electrical connection between the charged bullet head and the charged bullet head, and at the same time, the lifting device stops; When the magnetization of the metal ring is completed, the reset electromagnet is energized to generate magnetism, discharge the dust magnet, and cause the slide bar to reset. Then the lifting device is started to pull the metal ring to reset it with the detection clamp. The magnet under the floating plate is not affected by the metal ring and is re-embedded between the reset electromagnet and the magnet to resist the magnet. After that, the reset electromagnet is stopped from being energized.

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