A magnetic particle flaw detector for ring parts

Abstract

The present invention relates to the technical field of magnetic particle flaw detection, and specifically discloses a magnetic particle flaw detection machine for ring-shaped parts, comprising a bed, a feeding mechanism, a supporting wheel mechanism, a left-right movable iron core assembly, an up-and-down movable iron core assembly, etc. The supporting wheels are driven to move upward and rotate by a first driving mechanism and a second driving mechanism to receive materials, so that the workpiece on the material channel falls steadily on the supporting wheels, and then the workpiece is steadily sent to a position to be detected. After the rod-piercing iron core and the power receiving seat in the left-and-right movable iron core assembly are closed and energized, the workpiece can be longitudinally magnetized. After the U-shaped iron core in the up-and-down movable iron core assembly rises, it can fit with the rod-piercing iron core to form a closed loop. When the excitation coil is energized, the workpiece can be circumferentially magnetized to achieve composite magnetization. The magnetic particle flaw detection machine for ring-shaped parts described in the present invention can realize automatic loading and flaw detection, and has the advantages of simple operation, high flaw detection efficiency, safety and reliability, and low labor intensity for workers.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic particle flaw detection, in particular to a magnetic particle flaw detection machine for ring parts. Background Art

[0002] Magnetic particle inspection utilizes the interaction between the leakage magnetic field at the defects of the workpiece and the magnetic powder. It takes advantage of the difference in magnetic permeability between the surface and near-surface defects of steel products (such as cracks, slag inclusions, hairline, etc.) and the magnetic permeability of steel. After magnetization, the magnetic field at the discontinuity of these materials will be distorted, forming a leakage magnetic field on the surface of the workpiece where some magnetic flux leaks, thereby attracting magnetic powder to form magnetic powder accumulation at the defect - magnetic mark. Under appropriate lighting conditions, the position and shape of the defect are revealed. By observing and interpreting the accumulation of these magnetic powders, magnetic particle inspection is achieved.

[0003] Annular parts are generally magnetized longitudinally using coils and circumferentially using excitation coils and annular iron cores. However, current annular magnetic particle inspection machines all use manual loading and unloading, which results in unstable operation and low efficiency. Summary of the Invention

[0004] The problem solved by the present invention is that the prior art magnetic particle flaw detector for ring parts adopts manual loading and unloading, which results in unstable operation and low efficiency. The present invention provides a magnetic particle flaw detector for ring parts with a high degree of automation.

[0005] The present invention is achieved through the following technical solutions: a ring-shaped magnetic particle flaw detector, comprising a bed, a feeding mechanism, a roller mechanism, a left-right movable iron core assembly, a vertically movable iron core assembly, an ultraviolet lamp, a magnetic suspension spray mechanism, and an operation panel.

[0006] The bed includes a frame, a main frame, a liquid collecting tank, and a cover.

[0007] The feeding mechanism is provided with an inclined material channel and a barrier switch.

[0008] The supporting roller mechanism includes a mounting plate, a long axis and a short axis rotatably mounted on the mounting plate, supporting rollers mounted on the long axis and the short axis, a first driving mechanism for driving the mounting plate to rise and fall, a second driving mechanism for driving the mounting plate to rotate around the long axis, and a third driving mechanism for driving the long axis to rotate. At least one group of supporting rollers is arranged on each of the long axis and the short axis, and the supporting rollers are provided with ribs. The supporting surfaces of the supporting rollers are wavy and in line contact with the workpiece. The supporting rollers are made of flexible materials, such as nylon, which can avoid damage to the workpiece. Each group of supporting rollers is arranged relatively to each other and is located at the material channel mouth of the feeding mechanism. The present invention can realize automatic control of feeding. The first driving mechanism and the second driving mechanism drive the supporting rollers to move up and rotate to receive the material, so that the workpiece on the material channel falls smoothly on the supporting rollers, and the first driving mechanism and the second driving mechanism smoothly send the workpiece on the supporting rollers to the position to be detected, which is very stable, efficient and convenient.

[0009] The left-right movable iron core assembly includes a power receiving seat installed on the side of the main frame, a rod-through assembly that can move laterally and open and close with the power receiving seat, a track seat slidably connected to the rod-through assembly, and a fourth driving mechanism that drives the rod-through assembly to move. The power receiving seat includes an electrode seat and a first electrode copper bus insulated and installed on the power receiving seat. The rod-through assembly includes a movable frame, a rod-through iron core insulated and connected to the movable frame, and a second electrode copper bus conductively connected to the rod-through iron core. The first electrode copper bus and the second electrode copper bus are connected to a power supply. The longitudinal magnetization mechanism adopts the above-mentioned opening and closing structure, which can facilitate the roller mechanism to complete the material connection without interfering with the roller mechanism. After the rod-through iron core and the power receiving seat are closed and energized, the workpiece can be longitudinally magnetized.

[0010] The up and down moving iron core assembly includes a U-shaped iron core, an excitation coil wound outside the U-shaped iron core, and a fifth driving mechanism that drives the U-shaped iron core to move up and down. After the U-shaped iron core rises, it can fit with the rod-piercing iron core to form a closed loop. When the excitation coil is energized, the workpiece can be circumferentially magnetized.

[0011] Furthermore, the main frame includes a main frame vertical plate and a main frame top plate, the first driving mechanism includes a first cylinder installed on the main frame top plate, and a lifting frame plate vertically slidingly arranged on the main frame vertical plate, the output end of the first cylinder and the lifting frame plate are connected through a floating joint, and the lifting frame plate is rotatably connected to the long shaft.

[0012] Furthermore, the second driving mechanism includes a second cylinder rotatably mounted on the lifting frame plate, the output end of the second cylinder is rotatably connected to an end of the mounting plate away from the short axis, and the wheelbase between the mounting plate and the second cylinder rotation connection point and the short axis is larger than the wheelbase between the short axis and the long axis. Therefore, the extension of the second cylinder can press down the end of the mounting plate, causing the short axis to tilt, thereby facilitating material blocking and material connection.

[0013] Furthermore, the third driving mechanism includes a connecting pipe, a reducer, and a motor. The reducer is installed on the lifting frame plate through the extension of the connecting pipe. The output end of the reducer is connected to the long shaft, and the input end of the reducer is connected to the motor.

[0014] Furthermore, the movable frame of the rod-threading assembly is L-shaped, the upper part of the track seat and the movable frame are slidably connected by linear rails and sliders, the lower part of the track seat and the movable frame are slidably connected by guide rods and guide sleeves, the fourth driving mechanism includes a fourth cylinder installed on the bed, the output end of the fourth cylinder is connected to the movable frame, the track seat and the movable frame adopt two sets of sliding assemblies, which can make the movement of the rod-threading assembly more stable.

[0015] Furthermore, the fifth driving mechanism includes two fifth cylinders arranged on the bed, the fifth cylinder is a guide rod cylinder, the fifth cylinder is located on both sides of the U-shaped iron core, the output end of the fifth cylinder is connected to the two insulating support seats on the U-shaped iron core, and the two fifth cylinders are started at the same time, which can drive the U-shaped iron core to rise smoothly.

[0016] Furthermore, an iron core frame is provided at the bottom of the excitation coil, and the iron core frame is a C-shaped structure. When the U-shaped iron core is lowered to the lowest point, the iron core frame supports the excitation coil to prevent the U-shaped iron core from deforming.

[0017] Furthermore, a guide support portion for supporting the rod insertion assembly is provided at the power socket, and the guide support portion is located below the first electrode copper busbar and is provided with a rotatable roller. The guide support portion provides support force for the rod insertion assembly, so that the first electrode copper busbar does not need to provide support force. The first electrode copper busbar is only subjected to lateral extrusion force, which can prevent the first electrode copper busbar from deformation. The roller of the guide support portion can realize a guiding effect on the rod insertion assembly.

[0018] Furthermore, a proximity switch is installed on the track seat. When the rod insertion assembly is opened into place, the connecting seat blocks the proximity switch to determine whether the rod insertion assembly is opened into place, thereby avoiding interference between the rod insertion assembly and the supporting wheel mechanism.

[0019] Furthermore, an observation station is installed on the cover shell, and two parallel cylindrical rollers are horizontally arranged on the observation station. When observing the workpiece, the workpiece can be placed on the two cylindrical rollers at the observation station for rolling observation, which can achieve close observation without omission.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention can realize automatic control of loading. The first drive mechanism and the second drive mechanism drive the supporting wheel to move up and rotate to receive the material, so that the workpiece on the material channel falls smoothly on the supporting wheel, and the first drive mechanism and the second drive mechanism smoothly send the workpiece on the supporting wheel to the position to be tested, which is very stable, efficient and convenient.

[0022] 2. The longitudinal magnetization mechanism of the present invention adopts an open-and-close structure, which can facilitate the completion of the material connection by the supporting wheel mechanism without interfering with the rod-piercing iron core. After the rod-piercing iron core and the power receiving seat are closed and energized, the workpiece can be longitudinally magnetized. The up-and-down moving iron core assembly includes a U-shaped iron core, an excitation coil wound outside the U-shaped iron core, and a fifth driving mechanism that drives the U-shaped iron core to move up and down. After the U-shaped iron core rises, it can fit with the rod-piercing iron core to form a closed loop. When the excitation coil is energized, the workpiece can be circumferentially magnetized. The present invention adopts the above method to perform composite magnetization on the workpiece, and the workpiece rotates continuously on the supporting wheel to ensure that every part of the workpiece can obtain a good magnetization effect.

[0023] 3. The present invention is provided with a guide support part and an iron core frame to provide support for the rod-through iron core and the U-shaped iron core respectively, to prevent deformation and to extend the service life of the equipment.

[0024] 4. The present invention is provided with an observation station. When observing a workpiece, the workpiece can be placed on two cylindrical rollers at the observation station for rolling observation, which can achieve close observation without omission. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a magnetic particle flaw detector for ring parts according to the present invention;

[0026] Figure 2 This is a structural diagram of a magnetic particle flaw detector for ring parts according to the present invention (without the cover);

[0027] Figure 3 It is a structural schematic diagram of the supporting roller mechanism of the present invention;

[0028] Figure 4 This is a schematic structural diagram of the left-right movable iron core assembly of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the up and down moving iron core assembly of the present invention.

[0030] In the picture:

[0031] 1 bed; 101 frame; 102 main frame; 103 cover;

[0032] 2. Feeding mechanism;

[0033] 3 supporting roller mechanism; 301 mounting plate; 302 long axis; 303 short axis; 304 supporting roller; 305 first driving mechanism; 3051 first cylinder; 3052 lifting frame plate; 306 second driving mechanism; 3061 second cylinder; 307 third driving mechanism; 3071 connecting pipe; 3072 speed reducer; 3073 motor;

[0034] 4 Left and right movable iron core assembly; 401 electric connection seat; 4011 electrode seat; 4012 first electrode copper busbar; 4013 guide support portion; 402 rod insertion assembly; 4021 movable frame; 4022 rod insertion iron core; 4023 second electrode copper busbar; 403 track seat; 404 fourth driving mechanism; 4041 fourth cylinder; 405 proximity switch;

[0035] 5 Up and down moving core assembly; 501 U-shaped core; 502 excitation coil; 503 fifth driving mechanism; 5031 fifth cylinder; 504 core frame;

[0036] 6. Observation workstation. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] like Figure 1-5 As shown, a magnetic particle flaw detector for ring parts includes a bed 1, a feeding mechanism 2, a supporting wheel mechanism 3, a left-right movable core assembly 4, a vertically movable core assembly 5, an ultraviolet lamp, a magnetic suspension spray mechanism, and an operation panel.

[0039] The bed 1 includes a frame 101, a main frame 102, a liquid collecting tank, and a cover 103.

[0040] The feeding mechanism 2 is provided with an inclined material channel and a barrier switch.

[0041] The supporting wheel mechanism 3 includes a mounting plate 301, a long shaft 302 and a short shaft 303 rotatably mounted on the mounting plate 301, supporting wheels 304 mounted on the long shaft 302 and the short shaft 303, a first driving mechanism 305 for driving the mounting plate 301 up and down, a second driving mechanism 306 for driving the mounting plate 301 to rotate around the long shaft 302, and a third driving mechanism 307 for driving the long shaft 302 to rotate. At least one set of supporting wheels 304 is provided on each of the long shaft 302 and the short shaft 303. The supporting wheels 304 are provided with ribs, and the supporting surfaces of the supporting wheels 304 are made of corrugated paper. The supporting rollers 304 are made of a flexible material, such as nylon, to avoid damage to the workpiece. Each set of supporting rollers 304 is relatively arranged and located at the material channel mouth of the feeding mechanism 2. The present invention can realize automatic control of feeding. The first driving mechanism 305 and the second driving mechanism 306 drive the supporting rollers 304 to move up and rotate to receive the material, so that the workpiece on the material channel falls smoothly on the supporting rollers 304, and the first driving mechanism 305 and the second driving mechanism 306 smoothly send the workpiece on the supporting rollers 304 to the position to be detected, which is very stable, efficient and convenient.

[0042] The left-right movable iron core assembly 4 includes a power receiving seat 401 installed on the side of the main frame 102, a rod-piercing assembly 402 that can move laterally and open and close with the power receiving seat 401, a track seat 403 slidingly connected to the rod-piercing assembly 402, and a fourth driving mechanism 404 that drives the rod-piercing assembly 402 to move. The power receiving seat 401 includes an electrode seat 4011 and a first electrode copper bus 4012 insulated and installed on the power receiving seat 401. The rod-piercing assembly 402 includes a moving frame 4021, a rod-piercing iron core 4022 insulated and connected to the moving frame 4021, and a second electrode copper bus 4023 conductively connected to the rod-piercing iron core 4022. The first electrode copper bus 4012 and the second electrode copper bus 4023 are connected to a power supply. The longitudinal magnetization mechanism adopts the above-mentioned opening and closing structure, which can facilitate the roller mechanism 3 to complete the material connection without interfering with the roller mechanism 3. After the rod-piercing iron core 4022 and the power receiving seat 401 are closed and energized, the workpiece can be longitudinally magnetized.

[0043] The up and down moving iron core assembly 5 includes a U-shaped iron core 501, an excitation coil 502 wound outside the U-shaped iron core 501, and a fifth driving mechanism 503 that drives the U-shaped iron core 501 to move up and down. After the U-shaped iron core 501 rises, it can fit with the rod-piercing iron core 4022 to form a closed loop. When the excitation coil 502 is energized, the workpiece can be circumferentially magnetized.

[0044] In actual application, the main frame 102 includes a main frame vertical plate and a main frame top plate. The first driving mechanism 305 includes a first cylinder 3051 installed on the main frame top plate and a lifting frame plate 3052 vertically slidingly set on the main frame vertical plate. The output end of the first cylinder 3051 and the lifting frame plate 3052 are connected through a floating joint, and the lifting frame plate 3052 is rotatably connected to the long shaft 302.

[0045] In actual application, the second driving mechanism 306 includes a second cylinder 3061 rotatably set on the lifting frame plate 3052, and the output end of the second cylinder 3061 is rotatably connected to the end of the mounting plate 301 away from the short axis 303. The wheelbase of the rotation connection point between the mounting plate 301 and the second cylinder 3061 and the short axis 303 is larger than the wheelbase between the short axis 303 and the long axis 302. Therefore, the extension of the second cylinder 3061 can press down on the end of the mounting plate 301, causing the short axis 303 to tilt, which is convenient for blocking and connecting materials.

[0046] In actual application, the third driving mechanism 307 includes a connecting pipe 3071, a reducer 3072, and a motor 3073. The reducer 3072 is extended and installed on the lifting frame plate 3052 through the connecting pipe 3071. The output end of the reducer 3072 is connected to the long shaft 302, and the input end of the reducer 3072 is connected to the motor 3073.

[0047] In actual application, the movable frame 4021 of the rod-threading assembly 402 is L-shaped, the upper part of the track seat 403 and the movable frame 4021 is slidably connected by a linear rail and a slider, and the lower part of the track seat 403 and the movable frame 4021 is slidably connected by a guide rod and a guide sleeve. The fourth driving mechanism 404 includes a fourth cylinder 4041 installed on the bed 1, and the output end of the fourth cylinder 4041 is connected to the movable frame 4021. The track seat 403 and the movable frame 4021 use two sets of sliding assemblies, which can make the movement of the rod-threading assembly 402 more stable.

[0048] In actual application, the fifth driving mechanism 503 includes two fifth cylinders 5031 arranged on the bed 1, and the fifth cylinder 5031 is a guide rod cylinder. The fifth cylinder 5031 is located on both sides of the U-shaped iron core 501, and the output end of the fifth cylinder 5031 is connected to the two insulating support seats on the U-shaped iron core 501. When the two fifth cylinders 5031 are started at the same time, the U-shaped iron core 501 can be driven to rise smoothly.

[0049] In actual application, a core frame 504 is provided at the bottom of the excitation coil 502. The core frame 504 is a C-shaped structure. When the U-shaped core 501 is lowered to the lowest point, the core frame 504 supports the excitation coil 502 to prevent the U-shaped core 501 from deforming.

[0050] In actual application, the connecting socket 401 is provided with a guide support part 4013 for supporting the rod insertion assembly 402. The guide support part 4013 is located below the first electrode copper bus 4012 and is provided with a rotatable roller. The guide support part 4031 provides support force for the rod insertion assembly, so that the first electrode copper bus 4012 does not need to provide support force. The first electrode copper bus 4012 is only subjected to lateral extrusion force, which can prevent the first electrode copper bus 4012 from deformation. The roller of the guide support part 4013 can realize a guiding effect on the rod insertion assembly 402.

[0051] In actual application, a proximity switch 405 is installed on the track seat 403. When the rod insertion assembly 402 is opened into place, the connecting seat blocks the proximity switch 405 to determine whether the rod insertion assembly 402 is opened into place, thereby avoiding interference between the rod insertion assembly 402 and the supporting wheel mechanism 3.

[0052] In actual application, an observation station 6 is installed on the cover 103, and two parallel cylindrical rollers are horizontally arranged on the observation station 6. When observing the workpiece, the workpiece can be placed on the two cylindrical rollers at the observation station 6 for rolling observation, which can achieve close observation without omission.

[0053] Working principle of the present invention:

[0054] The magnetic particle inspection machine for ring parts described in the present invention mainly performs magnetic particle inspection on ring parts, especially the outer ring of a bearing. The workpiece is placed in a material channel on a feeding mechanism 2. A barrier switch is provided in the material channel, and the material channel is tilted downward. The inspection process includes the following steps:

[0055] S1, the first driving mechanism 305 drives the supporting wheel 304 to rise, and the second driving mechanism 306 drives the mounting plate 301 to rotate, so that the short axis 303 is higher than the long axis 302, which is used to block the material;

[0056] S2, the blocking switch of the feeding mechanism 2 is turned on, the outer ring of the bearing rolls downward, and the outer ring of the front bearing rolls to the supporting rollers 304 on the major axis 302 and the minor axis 303, and is supported and limited by the supporting rollers 304. The blocking switch of the feeding mechanism 2 is reset to block the material;

[0057] S3, the second driving mechanism 306 drives the mounting plate 301 to rotate and reset, so that the short axis 303 and the long axis 302 remain on the same horizontal plane.

[0058] S4: The first driving mechanism 305 drives the mounting plate 301 to descend, so that the axis of the bearing outer ring and the rod assembly 402 are at the same height.

[0059] S5, the third driving mechanism 307 drives the long shaft 302 to rotate, thereby driving the outer ring of the bearing to rotate,

[0060] S6, the magnetic suspension spraying mechanism starts to spray the magnetic suspension,

[0061] S6, the fourth driving mechanism 404 drives the rod-piercing core 4022 to move through the middle of the bearing outer ring and close with the power socket 401;

[0062] S8, the fifth driving mechanism 503 drives the U-shaped iron core 501 to move upward and close with the rod-piercing iron core 4022;

[0063] S9. Power on the first electrode copper busbar 4012 and the second electrode copper busbar 4023, adjust the current to about 2000A, adjust the excitation coil to about 1500A, and magnetize three times.

[0064] S10, moving the core assembly 4 left and right and the core assembly 5 up and down to reset;

[0065] S11. Take the outer ring of the bearing to observation station 6 to observe the magnetic traces;

[0066] S12, put the outer ring of the bearing back to the supporting wheel 304, and the fourth driving mechanism 404 drives the rod core 4022 and the power receiving seat 401 to close.

[0067] S13, the fifth driving mechanism 503 drives the U-shaped iron core 501 to move upward and close with the rod-piercing iron core 4022;

[0068] S14, energize the rod-piercing core 4022 and the excitation coil 502 to demagnetize the outer ring of the bearing;

[0069] S15, move the iron core assembly 4 left and right and the iron core assembly 5 up and down to reset and unload.

[0070] In summary, the magnetic particle flaw detector for ring parts described in the present invention can realize automatic loading and flaw detection, and has the advantages of simple operation, high flaw detection efficiency, safety and reliability, and low labor intensity for workers.

[0071] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments are only for the purpose of illustrating the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A magnetic particle flaw detector for ring parts, characterized by: It includes a bed (1), a feeding mechanism (2), a roller mechanism (3), a left-right movable iron core assembly (4), an up-and-down movable iron core assembly (5), an ultraviolet lamp, a magnetic suspension spraying mechanism, and an operation panel. The bed (1) comprises a frame (101), a main frame (102), a liquid collecting tank, and a cover (103). The feeding mechanism (2) is provided with an inclined material channel and a barrier switch. The supporting wheel mechanism (3) comprises a mounting plate (301), a long shaft (302) and a short shaft (303) rotatably mounted on the mounting plate (301), supporting wheels (304) mounted on the long shaft (302) and the short shaft (303), a first driving mechanism (305) for driving the mounting plate (301) to rise and fall, a second driving mechanism (306) for driving the mounting plate (301) to rotate around the long shaft (302), and a third driving mechanism (307) for driving the long shaft (302) to rotate. At least one set of supporting wheels (304) is respectively provided on the long shaft (302) and the short shaft (303), and the supporting wheels (304) are provided with a rib. Each set of supporting wheels (304) is arranged opposite to each other and is located at a material channel opening of the feeding mechanism (2). The left-right movable iron core assembly (4) comprises a power receiving seat (401) mounted on the side of the main frame (102), a rod-piercing assembly (402) capable of horizontal movement and opening and closing with the power receiving seat (401), a track seat (403) slidably connected to the rod-piercing assembly (402), and a fourth driving mechanism (404) for driving the rod-piercing assembly (402) to move. The power receiving seat (401) comprises an electrode seat (4011) and a first electrode copper busbar (4012) insulated and mounted on the power receiving seat (401). The rod-piercing assembly (402) comprises a movable frame (4021), a rod-piercing iron core (4022) insulated and connected to the movable frame (4021), and a second electrode copper busbar (4023) conductively connected to the rod-piercing iron core (4022). The first electrode copper busbar (4012) and the second electrode copper busbar (4023) are connected to a power source. The vertically movable iron core assembly (5) comprises a U-shaped iron core (501), an excitation coil (502) wound around the outside of the U-shaped iron core (501), and a fifth driving mechanism (503) for driving the U-shaped iron core (501) to move up and down. After the U-shaped iron core (501) rises, it can fit into the rod-piercing iron core (4022) to form a closed loop.

2. The ring-shaped magnetic particle flaw detector according to claim 1, characterized in that: The main frame (102) includes a main frame vertical plate and a main frame top plate, the first driving mechanism (305) includes a first cylinder (3051) installed on the main frame top plate, and a lifting frame plate (3052) vertically slidably arranged on the main frame vertical plate, the output end of the first cylinder (3051) and the lifting frame plate (3052) are connected via a floating joint, and the lifting frame plate (3052) and the long shaft (302) are rotatably connected.

3. The ring-shaped magnetic particle flaw detector according to claim 2, characterized in that: The second driving mechanism (306) comprises a second cylinder (3061) rotatably mounted on the lifting frame plate (3052), wherein an output end of the second cylinder (3061) is rotatably connected to an end of the mounting plate (301) away from the short axis (303), and a wheelbase between a rotational connection point between the mounting plate (301) and the second cylinder (3061) and the short axis (303) is greater than a wheelbase between the short axis (303) and the long axis (302).

4. The ring-shaped magnetic particle flaw detector according to claim 1, characterized in that: The third driving mechanism (307) comprises a connecting pipe (3071), a reducer (3072), and a motor (3073); the reducer (3072) is extended and mounted on the lifting frame plate (3052) via the connecting pipe (3071); the output end of the reducer (3072) is connected to the long shaft (302); and the input end of the reducer (3072) is connected to the motor (3073).

5. The ring-shaped magnetic particle flaw detector according to claim 1, characterized in that: The movable frame (4021) of the rod threading assembly (402) is L-shaped, the track seat (403) and the upper portion of the movable frame (4021) are slidably connected by a linear rail and a slider, and the lower portion of the track seat (403) and the movable frame (4021) are slidably connected by a guide rod and a guide sleeve. The fourth driving mechanism (404) includes a fourth cylinder (4041) installed on the bed (1), and the output end of the fourth cylinder (4041) is connected to the movable frame (4021).

6. The ring-shaped magnetic particle flaw detector according to claim 1, characterized in that: The fifth driving mechanism (503) comprises two fifth cylinders (5031) arranged on the bed (1), the fifth cylinders (5031) being guide rod cylinders, the fifth cylinders (5031) being located on both sides of the U-shaped iron core (501), and the output ends of the fifth cylinders (5031) being connected to two insulating support seats on the U-shaped iron core (501).

7. The ring-shaped magnetic particle flaw detector according to claim 1, characterized in that: An iron core frame (504) is provided at the bottom of the excitation coil (502). The iron core frame (504) is a C-shaped structure. When the U-shaped iron core (501) is lowered to the lowest point, the iron core frame (504) supports the excitation coil (502).

8. The ring-shaped magnetic particle flaw detector according to claim 1, characterized in that: The connecting seat (401) is provided with a guide support portion (4013) for supporting the rod-threading assembly (402); the guide support portion (4013) is located below the first electrode copper busbar (4012) and is provided with a rotatable roller.

9. The ring-shaped magnetic particle flaw detector according to claim 1, characterized in that: A proximity switch (405) is installed on the track seat (403), and when the rod-piercing assembly (402) is opened to its proper position, the connecting seat blocks the proximity switch (405).

10. The ring-shaped magnetic particle flaw detector according to claim 1, characterized in that: An observation station (6) is installed on the cover shell (103), and two parallel cylindrical rollers are horizontally arranged on the observation station (6).

Images