CN111377726B - Manufacturing process for producing broadband high-magnetic-permeability ring - Google Patents

Manufacturing process for producing broadband high-magnetic-permeability ring Download PDF

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CN111377726B
CN111377726B CN202010204488.5A CN202010204488A CN111377726B CN 111377726 B CN111377726 B CN 111377726B CN 202010204488 A CN202010204488 A CN 202010204488A CN 111377726 B CN111377726 B CN 111377726B
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kiln body
track
materials
crawler
protrusion
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CN111377726A (en
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燕杰
陈志华
谢文革
赵武奇
吴斌
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Zhejiang Chunhui Magnetoelectricity Technology Co ltd
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Zhejiang Chunhui Magnetoelectricity Technology Co ltd
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Abstract

The invention discloses a manufacturing process for producing a broadband high-magnetic-permeability ring, which comprises main materials and auxiliary materials, and the manufacturing steps comprise: s1, mixing Fe2O345.0-65.0 mol% and Mn3O4Mixing 25.0-44.0 mol% and ZnO 5-15.0 mol%, and pre-sintering at 800-1500 deg.C; s2, crushing, namely vibrating and crushing the raw materials subjected to pre-sintering treatment for 45-65 min; s3, adding alcohol and stirring, adding alcohol solution into the crushed materials, and carrying out ultrasonic oscillation for 60-120min, S4, respectively adding TiO2, MoO3, V2O5, Bi2O3, CaCO3, SiO2, Nb2O5, SnO2, Co2O3 and CuO into the materials as additives, so as to improve the frequency characteristic and the loss characteristic of the materials; s4, spray granulation, S5 and forming treatment. The invention meets the increasing requirements of light, thin, miniaturized, high-performance and high-density electronic components, and has higher magnetic permeability, and the initial magnetic permeability reaches 5K.

Description

Manufacturing process for producing broadband high-magnetic-permeability ring
Technical Field
The invention belongs to the technical field of soft magnetic Interference (EMI), and particularly relates to a manufacturing process for producing a broadband high-permeability ring.
Background
The ferrite magnetic powder and the magnetic core with high magnetic conductivity are indispensable electronic materials for realizing the miniaturization and light weight of products such as inductors, filters, pulse transformers and the like in electronic equipment such as program control communication, digital technology, network communication color TV and the like, and the initial magnetic conductivity in the magnetic materials is continuously improved, which is always pursued by engineering technicians and manufacturers in the field; so far, the high magnetic conductivity materials produced by the oxide method can only reach about 10000, and the performance indexes of the materials, such as loss, frequency characteristics, Curie temperature and the like, are not satisfactory.
Disclosure of Invention
The invention provides a manufacturing process for producing a broadband high-permeability ring, which is low in loss and high in frequency, and aims to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a manufacturing process for producing a broadband high-magnetic-permeability ring comprises main materials and auxiliary materials, and the manufacturing steps comprise
S1, mixing, namely mixing Fe2O345.0-65.0 mol%, Mn 3O 425.0-44.0 mol% and ZnO 5-15.0 mol%, and then pre-sintering at 800-1150 ℃;
s2, crushing, namely vibrating and crushing the raw materials subjected to pre-sintering treatment for 45-65 min;
s3, adding alcohol, stirring, adding the alcohol solution into the crushed materials, and ultrasonically oscillating for 60-120min;
s4, adding TiO2, MoO3, V2O5, Bi2O3, CaCO3, SiO2, Nb2O5, SnO2, Co2O3 and CuO into the material respectively to serve as additives, and improving the frequency characteristic and the loss characteristic of the material;
s4, spray granulation;
s5, molding;
s6, sintering, placing the blank obtained after the forming into a nitrogen combustion kiln, and sintering in the atmosphere with the oxygen content of 0.50-35.00%.
Preferably, the alcoholic solution is a PVA solution.
Preferably, the additive in step S4 comprises TiO 245-65 ppm, MoO 360-78 ppm, V2O 520-42 ppm, Bi2O 358-65 ppm, CaCO 332-42 ppm, SiO 255-61 ppm, Nb2O 550-66 ppm, SnO 248-68 ppm, Co2O 333-42 ppm and CuO 45-65 ppm.
Preferably, the particle size of the pulverized particles of step S2 is 90-150 μm.
Preferably, the nitrogen combustion kiln comprises a kiln body, a feeding device and a discharging device, wherein the feeding device and the discharging device are used for pushing the magnetic ring into the kiln body, a conveying part used for conveying the magnetic ring from one end of the kiln body to the other end, a plurality of heating parts used for heating air in the kiln body, an air supply part used for inputting air into the kiln body and a cooling part used for reducing the temperature of one end of the kiln body so as to cool the magnetic ring are arranged in the kiln body, and the cooling part is arranged at one end of the kiln body.
Preferably, the conveying component comprises a bracket arranged in the kiln body, a crawler arranged on the bracket, a driving structure for driving the crawler to rotate and a track for supporting the crawler, and the track is arranged on the bracket; through setting up the track, when it is in the kiln body, it has high temperature resistant characteristic, and it can be under the stable operation of a thousand more degrees and can not take place deformation to because what set up is the track, it still can form smooth plane at the pivoted in-process, thereby can realize that support piece supports at this in-process, guarantee support piece's supporting effect.
Preferably, the crawler comprises a plurality of first cross bars and a plurality of second cross bars arranged at intervals with the first cross bars, and the first cross bars are movably connected with the second cross bars; establish the track into first horizontal pole and second horizontal pole, it can be convenient for the track takes place deformation in the use to realize that the track carries out reciprocating rotation, and first, second horizontal pole can form smooth plane, can carry out good support to the backup pad.
Preferably, the conveying component further comprises a supporting plate for placing the magnetic ring, a disc-shaped tooth block is arranged on the supporting plate, and a rack matched with the tooth block is arranged on the support; through setting up the rack can with the intermeshing between the tooth piece, therefore the backup pad is rotatable, realizes the rotatory process in limit heating for the in-process magnetic ring that heats can be heated as far as evenly as possible, keeps the shaping effect after the magnetic ring heating.
Preferably, the upper end surface of the crawler is recessed downwards to form an annular rotating concave track, a plurality of first balls are arranged in the concave track, second balls with the diameter larger than that of the first balls are arranged on the crawler, and a recessed part matched with the second balls is arranged in the middle of the tooth block; the second ball is arranged to be in contact with the concave part, so that the whole tooth block can be supported; the first ball can support the edge of the tooth block, so that when the tooth block is contacted with the rack, the whole support plate can rotate and can drive the magnetic ring to rotate on the track; and set up the depressed part in the backup pad, it can be convenient for the second ball be located in the depressed part to the restriction backup pad takes place to remove, keeps the backup pad at the in-process of motion along with track synchronous motion, ensures the synchronism of motion between track and the backup pad, makes the rotation that the backup pad can be stable, improves the stability of backup pad motion.
In conclusion, the invention meets the increasing requirements of light, thin, small, high-performance and high-density electronic components, and has higher magnetic permeability, and the initial magnetic permeability reaches 5K; higher direct current superposition characteristics; the adaptability of the magnetic core to complex environments is improved, and the magnetic core has relatively wide temperature characteristics.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partial structural diagram of the first embodiment of the present invention.
Fig. 3 is a partial structural schematic diagram of the present invention.
Fig. 4 is a schematic view of a partial structure of the present invention.
Fig. 5 is an enlarged view of a in fig. 4.
Fig. 6 is a partial schematic structural diagram of the present invention.
Fig. 7 is a schematic diagram of a partial structure of the present invention.
Fig. 8 is a partial structural schematic view of the crawler belt of the invention.
Fig. 9 is a partial structural schematic view of the crawler belt of the present invention.
Fig. 10 is a schematic structural view of the support plate of the present invention.
Fig. 11 is a cross-sectional view of a support plate of the present invention.
Fig. 12 is a schematic structural view of the height limiting member of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example one
A manufacturing process for producing a broadband high-magnetic-permeability ring comprises main materials and auxiliary materials, and the manufacturing process comprises the following steps:
s1, mixing, namely mixing Fe2O345.0 mol%, Mn 3O 425.0 mol% and ZnO 5 mol%, and then pre-sintering at 800 ℃;
s2, crushing, namely vibrating and crushing the pre-sintered raw materials for 45min, wherein the particle size of the crushed particles is 90 mu m;
s3, adding alcohol, stirring, and adding an alcohol solution into the crushed materials, wherein the alcohol solution is a PVA solution and ultrasonically oscillating for 60-120min;
s4, adding TiO2, MoO3, V2O5, Bi2O3, CaCO3, SiO2, Nb2O5, SnO2, Co2O3 and CuO into the material respectively to serve as additives, and improving the frequency characteristic and the loss characteristic of the material;
s4, spray granulation;
s5, molding;
s6, sintering, placing the blank obtained after the forming into a nitrogen combustion kiln, and sintering in the atmosphere with the oxygen content of 0.50-35.00%.
Specifically, the additive comprises 245 ppm of TiO, 360ppm of MoO, 520 ppm of V2O, 358ppm of Bi2O, 332 ppm of CaCO, 255 ppm of SiO, 550 ppm of Nb2O, 248 ppm of SnO, 333 ppm of Co2O and 45ppm of CuO.
Example two
A manufacturing process for producing a broadband high-magnetic-permeability ring comprises main materials and auxiliary materials, and the manufacturing process comprises the following steps:
s1, mixing, namely mixing Fe2O345.0-65.0 mol%, Mn 3O 425.0-44.0 mol% and ZnO 5-15.0 mol%, and then pre-sintering at 950 ℃;
s2, crushing, namely vibrating and crushing the pre-sintered raw materials for 45-65min, wherein the particle size of the crushed particles is 90-150 mu m;
s3, adding alcohol, stirring, and adding an alcohol solution into the crushed materials, wherein the alcohol solution is a PVA solution and ultrasonically oscillating for 60-120min;
s4, adding TiO2, MoO3, V2O5, Bi2O3, CaCO3, SiO2, Nb2O5, SnO2, Co2O3 and CuO into the material respectively to serve as additives, and improving the frequency characteristic and the loss characteristic of the material;
s4, spray granulation;
s5, molding;
s6, sintering, placing the blank obtained after the forming into a nitrogen combustion kiln, and sintering in the atmosphere with the oxygen content of 0.50-35.00%.
Specifically, the additive comprises TiO 245-65 ppm, MoO 369 ppm, V2O 522 ppm, Bi2O360ppm, CaCO 338 ppm, SiO 258 ppm, Nb2O 556 ppm, SnO 260 ppm, Co2O 338 ppm and CuO 55 ppm.
EXAMPLE III
A manufacturing process for producing a broadband high-magnetic-permeability ring comprises main materials and auxiliary materials, and the manufacturing process comprises the following steps:
s1, mixing, namely mixing Fe2O365.0mol%, Mn 3O 444.0 mol% and ZnO 15.0 mol%, and then pre-sintering at 1150 ℃;
s2, crushing, namely vibrating and crushing the pre-sintered raw materials for 65min, wherein the particle size of the crushed particles is 150 mu m;
s3, adding alcohol, stirring, and adding an alcohol solution into the crushed materials, wherein the alcohol solution is a PVA solution and oscillating for 120min by ultrasonic waves;
s4, adding TiO2, MoO3, V2O5, Bi2O3, CaCO3, SiO2, Nb2O5, SnO2, Co2O3 and CuO into the material respectively to serve as additives, and improving the frequency characteristic and the loss characteristic of the material;
s4, spray granulation;
s5, molding;
s6, sintering, placing the blank obtained after the forming into a nitrogen combustion kiln, and sintering in the atmosphere with the oxygen content of 0.50-35.00%.
Specifically, the additive components were TiO 265 ppm, MoO 378 ppm, V2O 542 ppm, Bi2O365ppm, CaCO 342 ppm, SiO 261 ppm, Nb2O 566 ppm, SnO 268 ppm, Co2O 342 ppm, and CuO 65 ppm.
As shown in fig. 1 to 12, the nitrogen combustion kiln described in step S6 in embodiments 1 to 3 includes a kiln body 1, a feeding device, and a discharging device, wherein the magnetic ring is conveyed into the kiln body 1 through the feeding device for heating, and then is output through the discharging device; specifically, a conveying part 2, a heating part 3, an air supply part 4 and a cooling part 5 are arranged in a kiln body 1, the kiln body 1 is a square kiln body, two heat conduction plates 11 which are obliquely arranged from top to bottom are arranged on the kiln body 1, the heat conduction plates 11 are arranged in an arc shape, the heat conduction plates 11 are provided with two heat conduction plates 11, and the two heat conduction plates 11 are symmetrically arranged; therefore, the heat emitted from the heating part 3 can contact with the heat conducting plate 11 and then reversely rebounds to form circularly flowing heat, and the mode can ensure that a plurality of magnetic rings positioned at the lower part are heated when the magnetic rings are heated; the heating part 3 is a resistance wire arranged in the kiln body 1 and generates heat through electric conduction; the gas supply part 4 comprises a nitrogen pipeline 41 and an oxygen pipeline 42, wherein the nitrogen pipeline 41 is used for supplying nitrogen so that the interior of the kiln body 1 is in a nitrogen atmosphere state; the oxygen pipeline 42 is used for conveying oxygen; the end part of the nitrogen pipeline 41 is bent upwards, so that the nitrogen pipeline 41 is arranged upwards, and the oxygen pipeline 42 is also arranged upwards, therefore, when the nitrogen pipeline 41 and the oxygen pipeline 42 input gas into the kiln body 1, the gas impacts the top of the kiln body 1 and the heat conducting plate 11, and then both the nitrogen and the oxygen can circularly flow; this arrangement prevents that the concentration of local oxygen and nitrogen gas is too high and when causing the magnetic ring to heat, causes the ferrite material reaction of constitution magnetic ring incomplete, and it can improve the effect of magnetic ring after the heating.
Further, the conveying component 2 comprises a support 21, a crawler 22, a driving structure 23 and a track 24 which are arranged in the kiln body 1, the support 21 is a metal frame, and the support 21 is arranged in the kiln body 1; the driving structure 23 is composed of a driving roller 231, a driven roller 232 and a motor, the driving roller 231 is arranged on the bracket 21, the driving roller 231 rotates under the driving of the motor, a plurality of biting teeth 234 are arranged at two ends of the driving roller 231, the biting teeth 234 are metal teeth, and the biting teeth 234 are protruded on the surface of the driving roller 231; the teeth 234 engage the track 22 to rotate the track 22; the driven roller 232 is arranged at the other end of the bracket 21, and two ends of the driven roller 232 are movably connected with the bracket 21.
Specifically, the caterpillar track 22 is a metal caterpillar track sleeved on the driving roller 231 and the driven roller 232; the crawler 22 comprises a plurality of first crossbars 221 and a plurality of second crossbars 222, wherein the first crossbars 221 are metal square bars, and the second crossbars 222 are also metal square bars; a first protrusion 291 is formed at one side of the first rail 221, a first recess 292 having the same depth as that of the first protrusion 291 is formed at the other side, a second protrusion 293 having the same depth as that of the first protrusion 291 is formed at one side of the second rail 222, and a second recess 294 having the same depth as that of the first protrusion 291 is formed at the other side of the second rail 222, so that the first protrusion 291 is inserted into the second recess 294 and the same second protrusion 293 is inserted into the first recess 292 when the crawler 22 rotates, whereby the crawler 22 can be formed in a flat plate shape.
Specifically, the ends of the first crossbar 221 and the second crossbar 222 are movably connected through a hinge; a first notch 229 is arranged on two sides of the first cross bar 221, a second notch 228 is arranged on two sides of the second cross bar 222, the first notch 229 and the second notch 22 form a groove, and the biting teeth 234 are inserted between the first notch 229 and the second notch 228; thereby causing the track 22 to rotate, which is effective to improve the stability of the movement of the track 22, and which also avoids welding projections on the track 22, which reduces the weight of the track 22.
Further, the ends of the first crossbar 221 and the second crossbar 222 are movably connected through a hinge, a circular recessed rotating track 223 is disposed on the track 22, the circular recessed rotating track 223 is a circular recessed track, the circular recessed rotating track 223 is formed by downward recessing the upper end surface of the track, a plurality of first balls 224 are disposed in the circular recessed track 223, the first balls 224 are metal steel balls, and the first balls 224 are disposed on the first crossbar or the second crossbar; a second ball 225 is arranged in the middle of the circular shape encircled by the rotating concave track 223, the second ball 225 is a metal ball, and the diameter of the second ball 225 is larger than that of the first ball 224; the second ball 225 is raised above the upper end surface of the track 22.
A track 28 is arranged on the bracket, the track 28 is a metal beam, a track with a downward concave middle is arranged on the track 28, third balls 281 are arranged on the first cross bar and the second cross bar, and the third balls 281 are positioned in the track 28; the track 28 is configured to support the track 22 and to maintain the track 22 in a position that supports the magnetic rings, and the third ball 281 is located in the track 28.
Specifically, the conveying component 2 further comprises a supporting plate 27 for supporting a magnetic ring, the supporting plate 27 is a metal plate, and the magnetic ring is directly placed on the supporting plate 27; a tooth block 271 is connected to the supporting plate 27, the tooth block 271 is a circular disc-shaped metal block, and metal teeth are arranged on the side wall of the tooth block 271; the tooth block 271 is provided with a concave part 272, the concave part 272 is arranged in a conical shape, and the tooth block 271 is provided with an anti-slip concave part 273 communicated with the concave part 272, the anti-slip concave part 273 is an approximately hemispherical concave part, and the anti-slip concave part 273 is positioned at the top end of the concave part 272; when the support plate 27 is placed on the track 22, the second ball 225 contacts the inner wall of the recess 272, so that the inner wall of the recess 272 contacts the second ball 225 under the vibration of the track 22 and the gravity of the magnetic ring, and then the entire support plate 27 moves, and the anti-slip recess 273 is fitted over the second ball 225, so that the support plate 27 rotates.
Further, two racks 211 are arranged on the bracket 21, and the racks 211 are metal strips with teeth; after the anti-slip concave part 233 is sleeved on the second ball 225, when the support plate 27 moves along with the track 22, the support plate 27 contacts with the rack 211, so that the support plate 27 rotates; the bracket 21 is provided with a pushing component 24, the pushing component 24 comprises a push rod 241 and a push plate 242, the push rod 241 is a metal rod, the push rod 241 moves through an air cylinder, and the push rod 241 is arranged obliquely; the push plate 242 is a metal plate, and the push plate 242 is connected to the push rod 241, so that the push rod 241 can push the support plate 27 out of the kiln body 1 through the push plate 242.
Specifically, the cooling member 5 includes a circulation pipe 51 and a water inlet pipe 52 which are arranged at one end of the kiln body 1, the circulation pipe 51 is located at the upper part of the kiln body 1, the circulation pipe 51 is connected with a water outlet pipe 53 and the water inlet pipe 52, the water inlet pipe 52 is pumped into the circulation pipe 51 by a water pump to flow, and then is discharged out of the kiln body 1 through the water outlet pipe 53, the kiln body 1 is externally provided with a heat dissipation groove 54, the heat dissipation groove 54 is arranged on the side wall of the kiln body 1, water on the water outlet pipe 53 enters the heat dissipation groove 54 to be subjected to heat dissipation treatment, then is concentrated into a clean water tank, and then flows again after being pumped; the temperature of one end of the kiln body 1 can be effectively reduced through the arrangement mode, and then the heat on the magnetic ring can be absorbed.
Specifically, the feeding device comprises a frame body 61, a conveying part, a height limiting part and a pushing part, wherein the frame body 61 is a metal frame, the conveying part is arranged on the frame body 61, the conveying part comprises a first roller body, a second roller body, a motor 613 and a conveying belt 614, the first roller body and the second roller body are both arranged on the frame body 61, then the motor 613 is connected with the first roller body through a shaft to drive the first roller body to rotate, and the conveying belt 614 is sleeved on the first roller body and the second roller body, so that when the supporting plate 27 provided with the magnetic ring is arranged, the conveying belt 614 conveys the supporting plate 27 to one end of the kiln body 1; the height limiting component comprises a supporting rod 621 and a height limiting rod 622, the supporting rod 621 is a metal rod, the end of the height limiting rod 622 is connected with a spring 623, the lower end of the spring 623 is connected with the height limiting rod 622, the upper end of the spring 623 is connected with a connecting rod 624, the connecting rod 624 is inserted into the supporting rod 621, a locking bolt 625 is arranged on the supporting rod 621, and the connecting rod 624 is fixed through the locking bolt 625.
Further, a plurality of limit blocks 63 are arranged on the frame body 61, an elastic member 631 is arranged on the limit blocks 63, the elastic member 631 is a metal spring, one end of the elastic member 631 is connected with the limit blocks 63, and the other end is connected with the frame body 61; therefore, when the conveyor belt is conveyed to the frame body 61, the limit block 63 can limit the support plate 27; the pushing component comprises a pushing cylinder 641 and a pushing block 642, and the pushing cylinder 642 can push the pushing block to move, so that the supporting plate 27 is pushed by the pushing block to move forwards, and the supporting plate 27 falls on the crawler 22; it should also be noted that the height of the support is 3-6 cm above the tracks.
Further, the discharging device comprises a metal frame and a conveying belt, and the height of the conveying belt is 3-6 cm lower than the upper end face of the track. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (1)

1. A manufacturing process for producing a broadband high-magnetic-permeability ring comprises main materials and auxiliary materials, and is characterized in that: the preparation method comprises the following steps:
s1, mixing, taking Fe2O3 65.0mol％、Mn3O4Mixing 44.0 mol% and 15.0 mol% ZnO, and pre-sintering at 1150 deg.C;
s2, crushing, namely vibrating and crushing the pre-sintered raw materials for 65min, wherein the particle size of the crushed particles is 150 mu m;
s3, adding alcohol, stirring, adding the alcohol solution into the crushed materials, and oscillating for 120min by ultrasonic waves;
s4, respectively adding TiO into the materials2、MoO3、V2O5、Bi2O3、CaCO3、SiO2、Nb2O5、SnO2、Co2O3CuO is used as an additive to improve the frequency characteristic and the loss characteristic of the material;
s4, spray granulation;
s5, molding;
s6, sintering, namely placing the formed blank into a nitrogen combustion kiln, and sintering in an atmosphere with the oxygen content of 0.50-35.00%;
the alcoholic solution is a PVA solution;
the additive in the step S4 contains TiO as each component2 45-65ppm、MoO3 60-78ppm、V2O5 20-42ppm、Bi2O3 58-65ppm、CaCO3 32-42ppm、SiO2 55-61ppm、Nb2O5 50-66ppm、SnO2 48-68ppm、Co2O3 33-42ppm、CuO 45-65ppm；
The nitrogen combustion kiln comprises a kiln body (1), a feeding device and a discharging device, wherein the feeding device and the discharging device are used for pushing a magnetic ring to enter the kiln body, a conveying part (2) used for conveying the magnetic ring from one end of the kiln body (1) to the other end of the kiln body, a plurality of heating parts (3) arranged in the kiln body (1), a gas supply part (4) used for inputting gas into the kiln body (1) and a cooling part (5) used for reducing the temperature of one end of the kiln body (1) to cool the magnetic ring are arranged in the kiln body (1), and the cooling part (5) is arranged at one end of the kiln body (1);
the kiln body (1) is a square kiln body, two heat-conducting plates (11) which are obliquely arranged from top to bottom are arranged on the kiln body (1), the heat-conducting plates (11) are arranged in an arc shape, the heat-conducting plates (11) are provided with two heat-conducting plates, and the two heat-conducting plates (11) are symmetrically arranged;
the conveying component (2) comprises a support (21) arranged in the kiln body (1), a crawler (22) arranged on the support (21), a driving structure (23) used for driving the crawler (22) to rotate and a track (28) supporting the crawler (22), and the track (28) is arranged on the support (21);
the crawler (22) comprises a plurality of first cross bars (221) and a plurality of second cross bars (222) arranged at intervals with the first cross bars (221), and the first cross bars (221) are movably connected with the second cross bars (222);
third balls (281) are arranged on the first cross rod and the second cross rod, and the third balls (281) are positioned in the track (28);
the first cross bar (221) is a metal square bar, and the second cross bar (222) is also a metal square bar; a first protrusion (291) is arranged on one side of the first cross bar (221), a first recess (292) with the same depth as that of the first protrusion (291) is arranged on the other side of the first cross bar (221), a second protrusion (293) with the same depth as that of the first protrusion (291) is arranged on one side of the second cross bar (222), and a second recess (294) with the same depth as that of the first protrusion (291) is arranged on the other side of the second cross bar (222), so that when the crawler (22) rotates, the first protrusion (291) can be embedded into the second recess (294), and the same second protrusion (293) can be embedded into the first recess (292);
the conveying component (2) further comprises a supporting plate (27) for placing the magnetic ring, a disc-shaped tooth block (271) is arranged on the supporting plate (27), and a rack (211) matched with the tooth block (271) is arranged on the support (21);
an annular rotating concave track (223) is formed by downwards sinking the upper end surface of the crawler (22), a plurality of first balls (224) are arranged in the rotating concave track (223), second balls (225) with the diameter larger than that of the first balls (224) are arranged on the crawler (22), and a sinking part (272) matched with the second balls (225) is arranged in the middle of the tooth block (271);
the second ball (225) is arranged in the middle of a circle encircled by the rotary concave rail (223);
the concave part (272) is arranged in a conical shape, the tooth block (271) is provided with an anti-slip concave part (273) communicated with the concave part (272), the anti-slip concave part (273) is a concave part similar to a hemisphere, and the anti-slip concave part (273) is positioned at the top end of the concave part (272).
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