Low frequency eddy current metal internal nondestructive testing device

Abstract

The invention belongs to the technical field of metal internal nondestructive testing, and specifically is a low-frequency eddy current metal internal nondestructive testing device, comprising a frame, a conversion disk is arranged on the frame, a discharge rack for placing bearing rings is embedded and installed at equal angles on the conversion disk, a bracket and a discharge conveyor belt mechanism are arranged in sequence around the outer ring of the frame, a flaw detector probe is fixedly installed on the upper end of the bracket, a driving shaft is fixedly connected to the middle of the conversion disk, the driving shaft is rotatably installed in the frame, a driving mechanism is arranged at the lower end of the bracket, the driving mechanism comprises a movable block, a rectangular groove is opened at the lower end of the bracket, the movable block is slidably connected to the rectangular groove, and by driving the turntable to rotate, three groups of discharge racks can pass through the loading point, the flaw detector probe, and the discharge conveyor belt mechanism in sequence, so that the loading, detection, and unloading of the bearing ring can be carried out simultaneously, thereby realizing continuous detection of the bearing ring, and improving the detection efficiency of the bearing ring and the automation rate of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of metal internal nondestructive testing, in particular to a low-frequency eddy current metal internal nondestructive testing device. Background Art

[0002] Low-frequency eddy current technology usually refers to the technology of using a relatively low-frequency alternating magnetic field to generate eddy currents in conductive materials for detection. It is mainly used for non-destructive testing of materials, especially in the detection of metal materials. Common detection devices that use low-frequency eddy current technology include eddy current flaw detectors, metal material sorting machines, wall thickness gauges and other equipment.

[0003] The patent with publication number CN220552815U discloses an eddy current flaw detection device for bearing ring surface detection, including a base, on which two sets of transmission rollers are symmetrically rotatably mounted, the two sets of transmission rollers are used to support the bearing ring, a semicircular guide rail is arranged above the base, a curved slider is slidably connected to the semicircular guide rail, a probe mounting seat for mounting a detection probe is fixedly mounted on the curved slider, the detection probe is electrically connected to the eddy current flaw detector through a wire, and the bearing ring to be tested is placed on the two sets of transmission rollers, so that the two sets of transmission rollers drive the bearing ring to rotate, and the detection probe with a fixed position is cooperated to facilitate the eddy current flaw detection operation, and the detection operation is convenient and practical.

[0004] In the above scheme, when the bearing rings are inspected, although the operation is simple and convenient, the automation rate of the device is low. Secondly, only one group of bearing rings can be placed on the two groups of transmission rollers at a time. After the bearing rings are inspected, the inspected bearing rings need to be taken down before the next group of bearing rings can be put up. The taking and placing of the bearing rings takes a lot of time, and the bearing rings cannot be continuously inspected, which makes the bearing ring inspection efficiency relatively low, and is not suitable for large-scale inspection of bearing rings. For this reason, the present invention provides a low-frequency eddy current metal internal non-destructive inspection device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the low-frequency eddy current metal internal non-destructive testing device described in the present invention comprises a frame, a conversion disk is arranged on the frame, a discharge rack for placing bearing rings is embedded and installed at equal angles on the conversion disk, a bracket and a discharge conveyor belt mechanism are arranged in sequence around the outer ring of the frame, a flaw detector probe is fixedly installed on the upper end of the bracket, a driving shaft is fixedly connected to the middle of the conversion disk, the driving shaft is rotatably installed in the frame, a driving mechanism is arranged at the lower end of the bracket, the driving mechanism comprises a movable block, a rectangular groove is opened at the lower end of the bracket, the movable block is slidably connected to the rectangular groove, a rotating shaft connected to the movable block is rotatably connected, a rotating disk at one end of the rotating shaft is fixedly connected, a first spring is arranged below the movable block, a row of first guide columns are arranged on both sides of the discharge rack, and two rows of second guide columns are arranged on both sides of the front and back of the discharge rack, and a partition is fixedly installed in the discharge conveyor belt mechanism;

[0007] By driving the turntable to rotate, the three sets of unloading racks can pass through the loading point, flaw detector probe, and unloading conveyor belt mechanism in sequence, so that the loading, testing, and unloading of the bearing rings can be carried out simultaneously, thereby realizing continuous testing of the bearing rings and improving the testing efficiency of the bearing rings and the automation rate of the device.

[0008] Preferably, a through hole is provided on the movable block, the through hole is plugged with a guide post, and the guide post is fixedly installed in the rectangular groove;

[0009] The cooperation between the through hole and the guide column plays a guiding role in the movement of the movable block.

[0010] Preferably, a feeding mechanism is also provided on the outer ring of the frame, and the feeding mechanism includes a storage box for storing bearing rings, the storage box is located directly above a set of unloading racks, a fixed frame is fixedly connected to the storage box, and the lower end of the fixed frame is fixedly connected to the outer ring of the frame, and three groups of arc-shaped pads are provided at equal angles on the conversion disk, and the arc-shaped pads are used to block the lower port of the storage box;

[0011] Under the action of gravity, the bearing rings in the unloading rack will automatically fall into the second set of unloading racks, thereby realizing automatic loading of the bearing rings, which not only saves manpower but also further improves the automation rate of the device.

[0012] The cam is provided with a plurality of movable plates, and the movable plates are symmetrically inserted in the movable slots, and a supporting rod is fixedly connected to one side of the movable plate. One end of the supporting rod is provided with a lifting plate, and two groups of second springs are provided on both sides of the lifting plate. One end of the second spring is fixedly connected to the lifting plate, and the other end of the second spring is fixedly connected to the conversion plate, and a docking piece fixedly connected to the lower end of the lifting plate is provided. A bearing ring is placed between one end of the two groups of movable plates, and a first guide column and a second guide column are rotatably mounted on one end of the movable plate. Three groups of guide grooves are also provided on the conversion plate at equal angles, and the lifting plate is movably inserted in the guide groove, and a connecting groove is provided between the guide groove and the movable groove. Two groups of guide grooves are symmetrically distributed on the center of the lifting plate, and one end of the supporting rod passes through the guide groove and extends into the guide groove. The guide groove is composed of an oblique groove and a linear groove. An electric push rod is provided in the frame, and a docking head is provided at the upper end of the electric push rod, and an arc-shaped card groove for engaging the docking head is provided in the docking piece.

[0013] By driving the lifting plate to move upward or downward, only one set of movable plates will move, and under the guidance of one end of the other set of movable plates, the bearing rings will only fall into the corresponding flow channels in the discharge conveyor belt mechanism, thereby not only realizing automatic unloading of the bearing rings after inspection, but also realizing automatic classification of good and defective bearing rings, further improving the automation rate of the device.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By driving the turntable to rotate, the three sets of unloading racks can pass through the loading point, flaw detector probe, and unloading conveyor belt mechanism in sequence, so that the loading, testing, and unloading of the bearing ring can be carried out simultaneously, thereby realizing continuous testing of the bearing ring and improving the testing efficiency of the bearing ring and the automation rate of the device.

[0016] 2. When placing bearing rings in the discharge rack, the staff can put multiple groups of bearing ring discharge racks into the storage box in turn, so that multiple groups of bearing rings are stacked in the storage box, and the lowest bearing ring is located in the third group of discharge racks. When the drive conversion disk is rotated, the three groups of arc-shaped pads will rotate with the conversion disk. During the rotation, the lower port of the discharge rack will be staggered from the third group of discharge racks, and the corresponding arc-shaped pads will move below the lower port of the discharge rack, so that the lower port of the discharge rack is blocked by the arc-shaped pads until the second group of discharge racks rotates to below the lower port of the discharge rack, and the lower port of the discharge rack is staggered from the corresponding arc-shaped pads. Under the action of gravity, the bearing rings in the discharge rack will automatically fall into the second group of discharge racks, thereby realizing automatic loading of the bearing rings, which not only saves manpower, but also further improves the automation rate of the device.

[0017] 3. When the conversion disk drives the unloading rack together with the bearing ring to rotate to the unloading conveyor belt mechanism, the docking joint at the upper end of the electric push rod will enter the arc-shaped slot of the docking piece, and the electric push rod will drive the lifting plate to slide along the guide slot through the docking joint. At the same time, one end of a group of receiving rods will slide along the corresponding oblique slot, and one end of the other group of receiving rods will slide along the corresponding linear slot. Under the guidance of the oblique slot, one group of receiving rods will drive the corresponding movable plate to slide along the movable slot, and the other group of receiving rods sliding along the linear slot cannot move the corresponding movable plate. One group of receiving rods with The corresponding movable plate is moved away from the bearing ring, and the limit on the bearing ring is released. The bearing ring will fall along one end of the other set of movable plates toward a set of flow channels in the discharge conveyor mechanism. The flow channels are located obliquely below one end of the other set of movable plates. By driving the lifting plate to move upward or downward, only one set of movable plates will move, and under the guidance of one end of the other set of movable plates, the bearing ring will only fall into the corresponding flow channel in the discharge conveyor mechanism, thereby not only realizing automatic unloading of the bearing ring after inspection, but also realizing automatic classification of good and defective bearing rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the local structure of the present invention.

[0020] Figure 2 It is a schematic cross-sectional view of the local structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the combination of a cross-sectional conversion disc, a material placing rack, a cross-sectional fixing rack, and a driving mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the combination of the fixing frame, the movable block and the first spring of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the present invention.

[0024] Figure 6 It is a schematic diagram of the combination of the conversion plate, the material placing rack, the material discharging conveyor belt mechanism, the electric push rod, the first guide column and the second guide column in cross section of the present invention.

[0025] Figure 7 This is a schematic diagram from another perspective of the material unloading rack, material discharging conveyor belt mechanism, and electric push rod combination of the present invention.

[0026] Figure 8 It is a schematic diagram of the combination of the movable plate, the first guide column and the second guide column of the present invention.

[0027] In the figure: 1, frame; 101, electric push rod; 102, joint; 2, conversion plate; 201, arc-shaped pad frame; 202, movable groove; 203, guide groove; 204, connecting groove; 3, unloading rack; 31, first guide column; 32, second guide column; 4, bracket; 401, rectangular groove; 5, unloading conveyor belt mechanism; 51, partition; 6, flaw detector probe; 7, driving shaft; 8, driving mechanism; 9, feeding Mechanism; 801, movable block; 8011, through hole; 8012, guide column; 802, rotating shaft; 803, turntable; 804, first spring; 901, material storage box; 902, fixed frame; 301, movable plate; 302, receiving rod; 303, lifting plate; 3031, guide groove; 311, oblique groove; 312, linear groove; 304, second spring; 305, docking piece; 3051, arc-shaped slot. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1:

[0029] like Figures 1 to 3 As shown, the low-frequency eddy current metal internal non-destructive testing device described in the embodiment of the present invention includes a frame 1, a conversion disk 2 is provided on the frame 1, and a discharge rack 3 for placing bearing rings is embedded and installed at an equal angle on the conversion disk 2, and a bracket 4 and a discharge conveyor belt mechanism 5 are sequentially arranged around the outer ring of the frame 1, a flaw detector probe 6 is fixedly installed on the upper end of the bracket 4, a driving shaft 7 is fixedly connected to the middle of the conversion disk 2, and the driving shaft 7 is rotatably installed in the frame 1, and a driving mechanism 8 is arranged at the lower end of the bracket 4. The driving mechanism 8 includes a movable block 801, a rectangular groove 401 is opened at the lower end of the bracket 4, the movable block 801 is slidably connected to the rectangular groove 401, a rotating shaft 802 rotatably connected to the movable block 801, and a rotating disk 803 fixedly connected to one end of the rotating shaft 802, and a first spring 804 is arranged below the movable block 801, a row of first guide columns 31 are arranged on the left and right sides of the discharge rack 3, and two rows of second guide columns 32 are arranged on the front and rear sides of the discharge rack 3, and a partition 51 is fixedly installed in the discharge conveyor belt mechanism 5.

[0030] Specifically, the discharge conveyor mechanism 5 is divided into two groups of flow channels by the partition plate 51, one group is a good product flow channel, and the other group is a defective product flow channel. The first guide columns 31 in each column of the first guide columns 31 are arranged at intervals, and the second guide columns 32 in each column of the second guide columns 32 are also arranged at intervals. In the initial state, the flaw detector probe 6 is facing a group of discharge racks 3, the second group of discharge racks 3 are located above the end of the discharge conveyor mechanism 5, and the third group of discharge racks 3 are located at the loading point. When it is necessary to detect the bearing rings, a group of bearing rings to be detected is placed in the third group of discharge racks 3, the two columns of first guide columns 31 in the third group of discharge racks 3 support the bearing rings, and the four columns of second guide columns 32 in the third group of discharge racks 3 are symmetrically distributed on both sides of the bearing rings. At this time, the motor drives the active shaft 7 to rotate 120 degrees, and the active shaft 7 drives the conversion disk 2 to rotate together with the third group of discharge racks 3 with the bearing rings placed thereon, and the rotation direction is attached Figure 1 The middle arrow indicates the direction, so that the third set of unloading racks 3 with bearing rings are moved to the oblique direction of the flaw detector probe 6. During this process, a set of first guide pillars 31 in the third set of unloading racks 3 will squeeze the turntable 803, so that the turntable 803 drives the rotating shaft 802 and the movable block 801 to move downward, and the movable block 801 compresses the first spring 804 until the turntable 803 is stuck between the two sets of first guide pillars 31 under the rebound force of the first spring 804, and the outer ring of the turntable 803 is close to the two sets of first guide pillars 31, and then the bearing rings on the third set of unloading racks 3 are scanned and detected by the flaw detector probe 6, and at the same time, the motor drives the rotating shaft 802 to rotate, the rotating shaft 802 drives the turntable 803 to rotate, the turntable 803 drives the two sets of first guide pillars 31 to rotate, and the two sets of first guide pillars 31 drive the bearing rings to rotate, so as to realize the flaw detector. The probe 6 performs all-round inspection of the bearing rings. During the inspection process of the flaw detector probe 6, the staff continues to place the next group of bearing rings into the second group of unloading racks 3. After the inspection of the flaw detector probe 6 is completed, the turntable 803 is continued to be driven to rotate so that the inspected bearing rings are rotated to the top of the discharge conveyor belt mechanism 5. The staff takes the inspected bearing rings out of the unloading rack 3 and places the bearing rings into the corresponding flow channels in the discharge conveyor belt mechanism 5 according to the inspection results. Then the above operation is repeated. Compared with the prior art, by driving the turntable 803 to rotate, the three groups of unloading racks 3 can pass through the loading point, the flaw detector probe 6 and the discharge conveyor belt mechanism 5 in turn, so that the loading, inspection and unloading of the bearing rings can be carried out simultaneously, thereby realizing continuous inspection of the bearing rings and improving the inspection efficiency of the bearing rings and the automation rate of the device.

[0031] like Figure 4 As shown, a through hole 8011 is opened on the movable block 801 , and the through hole 8011 is plugged into a guide post 8012 , and the guide post 8012 is fixedly installed in the rectangular groove 401 .

[0032] Specifically, when the rotating disk 803 drives the rotating shaft 802 and the movable block 801 to move downward, the through hole 8011 on the movable block 801 slides along the guide column 8012 , and the cooperation between the through hole 8011 and the guide column 8012 guides the movement of the movable block 801 .

[0033] like Figure 5 As shown, a feeding mechanism 9 is also provided on the outer ring of the frame 1, and the feeding mechanism 9 includes a storage box 901 for storing bearing rings, and the storage box 901 is located directly above a set of discharge racks 3, and a fixing frame 902 is fixedly connected to the storage box 901, and the lower end of the fixing frame 902 is fixedly connected to the outer ring of the frame 1, and three groups of arc-shaped pads 201 are provided at equal angles on the conversion disk 2, and the arc-shaped pads 201 are used to block the lower port of the storage box 901.

[0034] Specifically, the lower port of the storage box 901 is slightly lower than the height of the arc-shaped support frame 201. When placing the bearing rings in the discharge rack 3, the staff can sequentially place multiple groups of bearing ring discharge racks 3 into the storage box 901, so that the multiple groups of bearing rings are stacked in the storage box 901, and the lowermost bearing ring is located in the third group of discharge racks 3. When the conversion disk 2 is driven to rotate, the three groups of arc-shaped support frames 201 will rotate with the conversion disk 2. During the rotation, the lower port of the discharge rack 3 will stagger the third The first group of unloading racks 3 and the corresponding arc-shaped pad frame 201 will move to the bottom of the lower port of the unloading rack 3, so that the lower port of the unloading rack 3 is blocked by the arc-shaped pad frame 201, until the second group of unloading racks 3 rotates to the bottom of the lower port of the unloading rack 3, and the lower port of the unloading rack 3 is staggered with the corresponding arc-shaped pad frame 201. Under the action of gravity, the bearing ring in the unloading rack 3 will automatically fall into the second group of unloading racks 3, thereby realizing automatic loading of the bearing ring, which not only saves manpower, but also further improves the automation rate of the device. Embodiment 2:

[0035] like Figure 6 and Figure 7As shown, compared with Example 1, another embodiment of the present invention is: the unloading rack 3 includes two groups of movable plates 301, three groups of movable grooves 202 are opened at equal angles on the conversion disk 2, the two groups of movable plates 301 are symmetrically and movably inserted in the movable grooves 202, a receiving rod 302 fixedly connected to one side of the movable plate 301, a lifting plate 303 is arranged at one end of the receiving rod 302, two groups of second springs 304 are arranged on both sides of the lifting plate 303, one end of the second spring 304 is fixedly connected to the lifting plate 303, the other end of the second spring 304 is fixedly connected to the conversion disk 2, a docking piece 305 fixedly connected to the lower end of the lifting plate 303, a bearing ring is placed between one end of the two groups of movable plates 301, and a first guide column 31 and the second guide column 32 are rotatably mounted on one end of the movable plate 301, three groups of guide grooves 203 are also opened at equal angles on the conversion disk 2, the lifting plate 303 is movably inserted into the guide groove 203, a connecting groove 204 is arranged between the guide groove 203 and the movable groove 202, two groups of guide grooves 3031 are centrally symmetrically distributed on the lifting plate 303, one end of the receiving rod 302 passes through the guide groove 3031 and extends into the guide groove 3031, the guide groove 3031 is composed of an oblique groove 311 and a straight groove 312, an electric push rod 101 is arranged in the frame 1, a docking head 102 is arranged at the upper end of the electric push rod 101, and an arc-shaped card groove 3051 for engaging the docking head 102 is arranged in the docking member 305.

[0036] Specifically, the above-mentioned process requires that the staff manually remove the inspected bearing rings from the discharge rack 3, and classify the inspected bearing rings into two groups of flow channels in the discharge conveyor mechanism 5. A long time will make the staff tired. Fatigue will not only reduce the work efficiency of the staff, but also easily cause the staff to make mistakes in classifying good and defective products, affecting the subsequent further processing of the bearing rings. Therefore, after the bearing rings on the discharge rack 3 are inspected, the conversion disk 2 drives the discharge rack 3 together with the bearing rings to rotate to the discharge conveyor mechanism 5. During this process, the docking joint 102 at the upper end of the electric push rod 101 will enter the arc-shaped card groove 3051 of the docking piece 305, and then the electric push rod 101 is started. The electric push rod 101 drives the lifting plate 303 to slide along the guide groove 203 through the docking joint 102. At the same time, one end of a group of receiving rods 302 will slide along the corresponding oblique groove 311, and one end of the other group of receiving rods 302 will slide along the corresponding The linear groove 312 slides, and under the guidance of the oblique groove 311, a group of receiving rods 302 will drive the corresponding movable plate 301 to slide along the movable groove 202. The other group of receiving rods 302 sliding along the linear groove 312 cannot make the corresponding movable plate 301 move. One group of receiving rods 302 drives one end of the corresponding movable plate 301 away from the bearing ring, releasing the limit on the bearing ring, and the bearing ring will fall along one end of the other group of movable plates 301 toward a group of flow channels in the discharge conveyor mechanism 5. The flow channel is located obliquely below one end of the other group of movable plates 301. By driving the lifting plate 303 to move upward or downward, only one group of movable plates 301 will move, and under the guidance of one end of the other group of movable plates 301, the bearing ring will only fall into the corresponding flow channel in the discharge conveyor mechanism 5, thereby not only realizing automatic unloading of the bearing ring after detection, but also realizing automatic classification of good and defective bearing rings, further improving the automation rate of the device.

[0037] Working principle: a group of bearing rings to be tested is placed in the third group of unloading racks 3, the two rows of first guide columns 31 in the third group of unloading racks 3 hold the bearing rings, and the four rows of second guide columns 32 in the third group of unloading racks 3 are symmetrically distributed on both sides of the bearing rings. At this time, the motor drives the active shaft 7 to rotate 120 degrees, and the active shaft 7 drives the conversion disk 2 to rotate together with the third group of unloading racks 3 where the bearing rings are placed, and the rotation direction is the attached Figure 1The middle arrow indicates the direction, so that the third set of unloading racks 3 with the bearing rings placed thereon are moved to the oblique direction of the flaw detector probe 6. During this process, a set of first guide pillars 31 in the third set of unloading racks 3 will squeeze the turntable 803, so that the turntable 803 drives the rotating shaft 802 and the movable block 801 to move downward, and the movable block 801 compresses the first spring 804 until the turntable 803 is stuck between the two sets of first guide pillars 31 under the rebound force of the first spring 804, and the outer ring of the turntable 803 is tightly against the two sets of first guide pillars 31. Then, the flaw detector probe 6 is used to scan and detect the bearing rings on the third set of unloading racks 3. At the same time, the motor drives the rotating shaft 802 to rotate. The shaft 802 drives the turntable 803 to rotate, the turntable 803 drives the two groups of first guide columns 31 to rotate, and the two groups of first guide columns 31 drive the bearing rings to rotate, so as to realize the all-round detection of the bearing rings by the flaw detector probe 6. During the detection process of the flaw detector probe 6, the staff continues to place the next group of bearing rings into the second group of unloading racks 3. After the detection of the flaw detector probe 6 is completed, the turntable 803 is continued to be driven to rotate, so that the detected bearing rings are rotated to the top of the discharge conveyor belt mechanism 5. The staff takes the detected bearing rings out of the unloading rack 3, and puts the bearing rings into the corresponding flow channel in the discharge conveyor belt mechanism 5 according to the detection results, and then repeats the above operation.

[0038] When placing bearing rings into the discharge rack 3, the staff can put multiple groups of bearing ring discharge racks 3 into the storage box 901 in sequence, so that the multiple groups of bearing rings are stacked in the storage box 901, and the lowest bearing ring is located in the third group of discharge racks 3. When the driving conversion disk 2 rotates, the three groups of arc-shaped pads 201 will rotate with the conversion disk 2. During the rotation process, the lower port of the discharge rack 3 will be staggered from the third group of discharge racks 3, and the corresponding arc-shaped pad 201 will move below the lower port of the discharge rack 3, so that the lower port of the discharge rack 3 is blocked by the arc-shaped pad 201, until the second group of discharge racks 3 rotates to below the lower port of the discharge rack 3, and the lower port of the discharge rack 3 is staggered from the corresponding arc-shaped pad 201. Under the action of gravity, the bearing rings in the discharge rack 3 will automatically fall into the second group of discharge racks 3;

[0039] After the bearing ring on the unloading rack 3 is detected, the conversion disk 2 drives the unloading rack 3 together with the bearing ring to rotate to the unloading conveyor belt mechanism 5. During this process, the docking joint 102 at the upper end of the electric push rod 101 will enter the arc-shaped slot 3051 of the docking piece 305, and then the electric push rod 101 is started. The electric push rod 101 drives the lifting plate 303 to slide along the guide groove 203 through the docking joint 102. At the same time, one end of a group of receiving rods 302 will slide along the corresponding oblique slot 311, and one end of the other group of receiving rods 302 will slide along the corresponding straight slot The groove 312 slides, and under the guidance of the oblique groove 311, a group of receiving rods 302 will drive the corresponding movable plate 301 to slide along the movable groove 202. Another group of receiving rods 302 sliding along the straight groove 312 cannot move the corresponding movable plate 301. One group of receiving rods 302 drives one end of the corresponding movable plate 301 away from the bearing ring, releasing the limit on the bearing ring, and the bearing ring will fall along one end of the other group of movable plates 301 toward a group of flow channels in the discharge conveyor mechanism 5, which is located obliquely below one end of the other group of movable plates 301.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low-frequency eddy current metal internal non-destructive testing device, comprising a frame (1), characterized in that: The frame (1) is provided with a conversion disk (2), and a material discharging rack (3) for placing bearing rings is embedded and installed at an equal angle on the conversion disk (2). A bracket (4) and a material discharging conveyor belt mechanism (5) are sequentially arranged around the outer ring of the frame (1). A flaw detector probe (6) is fixedly installed on the upper end of the bracket (4). The middle part of the conversion disk (2) is fixedly connected to a driving shaft (7), and the driving shaft (7) is rotatably installed in the frame (1). A driving mechanism (8) is arranged at the lower end of the bracket (4); the driving mechanism (8) comprises: a movable block (801), the bracket ( 4) a rectangular groove (401) is provided at the lower end, the movable block (801) is slidably connected to the rectangular groove (401); a rotating shaft (802) connected to the movable block (801) is rotatably connected; a rotating disk (803) is fixedly connected to one end of the rotating shaft (802); a first spring (804) is provided below the movable block (801); a row of first guide columns (31) are provided on both the left and right sides of the unloading rack (3), and two rows of second guide columns (32) are provided on both the front and rear sides of the unloading rack (3); a partition plate (51) is fixedly installed in the unloading conveyor belt mechanism (5); The material unloading rack (3) comprises: two groups of movable plates (301), three groups of movable grooves (202) are formed at equal angles on the conversion disk (2), and the two groups of movable plates (301) are symmetrically and movably inserted into the movable grooves (202); a receiving rod (302) fixedly connected to one side of the movable plate (301); a lifting plate (303) is arranged at one end of the receiving rod (302); two groups of second springs (304) are arranged on both sides of the lifting plate (303), one end of the second spring (304) is fixedly connected to the lifting plate (303), and the other end of the second spring (304) is fixedly connected to the conversion disk (2); a docking piece (305) is fixedly connected to the lower end of the lifting plate (303); A bearing ring is placed between one end of the two sets of movable plates (301), and a first guide column (31) and a second guide column (32) are rotatably mounted on one end of the movable plate (301); The conversion disk (2) is also provided with three groups of guide grooves (203) at equal angles, the lifting plate (303) is movably plugged into the guide grooves (203), and a connecting groove (204) is provided between the guide grooves (203) and the movable grooves (202); Two groups of guide grooves (3031) are symmetrically distributed on the center of the lifting plate (303), and one end of the receiving rod (302) passes through the guide groove (3031) and extends into the guide groove (3031); The guide groove (3031) consists of an oblique groove (311) and a straight groove (312).

2. The low-frequency eddy current metal internal nondestructive testing device according to claim 1, characterized in that: The movable block (801) is provided with a through hole (8011), the through hole (8011) is plugged with a guide column (8012), and the guide column (8012) is fixedly installed in the rectangular groove (401).

3. The low-frequency eddy current metal internal nondestructive testing device according to claim 2 is characterized in that: A feeding mechanism (9) is also provided on the outer ring of the frame (1), and the feeding mechanism (9) comprises a storage box (901) for storing bearing rings, the storage box (901) being located directly above a set of unloading racks (3); and a fixing frame (902) fixedly connected to the storage box (901), the lower end of the fixing frame (902) being fixedly connected to the outer ring of the frame (1).

4. The low-frequency eddy current metal internal nondestructive testing device according to claim 3 is characterized in that: Three groups of arc-shaped support frames (201) are arranged at equal angles on the conversion disk (2), and the arc-shaped support frames (201) are used to block the lower port of the material storage box (901).

5. The low-frequency eddy current metal internal nondestructive testing device according to claim 1, characterized in that: An electric push rod (101) is arranged in the frame (1), a docking head (102) is arranged at the upper end of the electric push rod (101), and an arc-shaped slot (3051) for engaging the docking head (102) is arranged in the docking piece (305).

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