71 results about "Demagnetizer" patented technology

The invention discloses a full-automatic ultrasonic and magnetic powder synchronous nondestructive testing system and method for a bearing ring, and belongs to the technical field of bearing nondestructive testing. The testing system comprises a main testing system, a demagnetizer, a truss mechanical arm and an electric control cabinet; the main detection system comprises a detection module, a motion module, a hanging rod module, a jacket module, a magnet yoke, a lifting module, a magnetic liquid nozzle and a liquid collecting tank; the detection module comprises a vision assembly and an ultrasonic assembly which can be movably controlled; the bearing ring is hung on a rotating hanging rod shaft in the hanging rod module and limited. The system can carry out nondestructive testing on all the surfaces and the interior of the rotating bearing ring, the demagnetizer is used for carrying out pre-testing magnetism and post-testing magnetism, the truss mechanical arm is used for transferring the bearing ring, and full-automatic detection is achieved through a control method. According to the invention, the technical problem that all surface and internal defects of the large bearing ring are difficult to automatically and simultaneously detect in a nondestructive manner at one time in the prior art is solved, and the bearing ring with a large size range can be detected.

The utility model belongs to the technical field of vacuum suction nozzle demagnetization, and discloses vacuum suction nozzle demagnetization equipment which comprises a base, a protective cover is fixedly connected to the upper surface of the base, a demagnetizer body is fixedly installed on the inner top wall of the protective cover, an alternate feeding mechanism is arranged on the upper surface of the base, and the alternate feeding mechanism comprises a U-shaped installation frame. According to the vacuum suction nozzle demagnetization device, the alternate feeding mechanism is arranged, so that when the vacuum suction nozzle on the first feeding plate is matched with the demagnetizer body for demagnetization, the vacuum suction nozzle on the first feeding plate can be subjected to demagnetization, and the vacuum suction nozzle on the second feeding plate can be subjected to demagnetization; and meanwhile, a worker can unload and re-load the demagnetized vacuum suction nozzles on the second loading plate, and loading and demagnetizing are performed in a reciprocating alternate manner, so that the downtime of the demagnetizer body is shortened, and the demagnetizing efficiency of the vacuum suction nozzles is improved.

The utility model discloses a demagnetizing machine with a drying system, which comprises a sealing shell (13) and a plurality of coils (7) arranged in the sealing shell, a material channel (2) is arranged in the middle of the sealing shell, a screen (1) is arranged in the material channel, an oil inlet (10) and an oil outlet (11) are arranged on the sealing shell, and the oil inlet (10) is communicated with the oil outlet (11). A cooling channel (14) filled with heat conduction oil is arranged between the sealing shell and the coil, a flow guide channel is arranged between the cooling channel and the material channel, the oil inlet, the cooling channel, the flow guide channel and the oil outlet are sequentially communicated, and the oil inlet is communicated with a conveying oil pump (F101) through a first oil guide pipe (G301). The material drying system is integrated, and waste heat generated by the demagnetizer system can be effectively utilized to dry materials.

The utility model discloses a mounting mechanism of a demagnetizer in suction nozzle demagnetization equipment, which comprises a demagnetization equipment body and a mounting block, the mounting block is positioned in the demagnetization equipment body, the upper surface of the mounting block is provided with a limiting slot, the inner wall of the limiting slot is movably inserted with a limiting insert block, the surface of one side of the limiting insert block is provided with a positioning hole, and the limiting insert block is movably inserted into the limiting slot. According to the device convenient to disassemble and assemble, the effects that the magnetic eraser body can be rapidly disassembled and assembled, operation is convenient and fast, the maintenance efficiency is improved, the installation position of the magnetic eraser body can be conveniently moved and adjusted, and practicability is improved are achieved.

The present invention belongs to the technical field of processing and conveying of battery positive electrode accessories, and specifically relates to a conveying device for processing battery positive electrode accessories, including a base frame. A conveying frame is provided at the upper end of the base frame. A conveying structure is provided on the surface of the conveying frame, and the conveying structure is used for conveying battery positive electrode sheets. An adjusting structure is provided on the surface of the conveying structure; the conveying structure includes: rubber conveying rollers, and a plurality of rubber conveying rollers are rotatably connected to the inner wall of the conveying frame. By providing a clamping plate and a demagnetizer, during the conveying of the battery positive electrode sheet, demagnetization treatment can be performed on both sides of the battery positive electrode sheet, and the adjustment of the front and back sides of the battery positive electrode sheet will not cause damage to the battery positive electrode sheet. The receiver provided on the inner wall of the conveying frame can also rotate automatically when the battery positive electrode sheet enters the inside of the clamping plate, thereby avoiding the problem that the clamping plate flips when the battery positive electrode sheet has not completely entered the inside of the clamping plate.

The utility model discloses a demagnetization auxiliary conveying device which comprises a support, a guide rail and a conveying table top. The height of the support leg is matched with the height of a demagnetization window of the demagnetizer; the horizontal frame comprises two long edges and two short edges; u-shaped grooves with upward openings are formed in the two long sides of the U-shaped grooves respectively; a guide rail is placed in each U-shaped groove, each guide rail is composed of two metal rods and an insulating rod, and the insulating rods are placed between the two metal rods and abut against each other end to end; the horizontal frame horizontally penetrates through a demagnetization window of the demagnetizer, and the part, located in the demagnetization window, of the insulation conveying table top is erected on the two guide rails through idler wheels. And the conveying table board can completely penetrate through the demagnetizer. A worker can place multiple pairs of tools on the conveying table top at a time, the tools are pushed back and forth to penetrate through the demagnetizer to achieve the demagnetization effect, and the demagnetization efficiency is greatly improved. In addition, manual transmission is not needed in the process that the cutter penetrates through the demagnetizer, collision of the cutter is avoided, and meanwhile production accidents are avoided.

The utility model provides an automatic bearing demagnetizing and cleaning device which comprises a demagnetizing device and a cleaning device, firstly, a bearing is placed on a first conveying belt, under the constant-speed propelling of the first conveying belt, the bearing enters the demagnetizing device to be demagnetized and then reaches a first extending plate at the tail end of the first conveying belt, and the first extending plate is installed in an inclined mode; when the bearings fall into the second conveying belt, the second conveying belt drives the bearings to be cleaned at a constant speed, the bearings firstly pass through a baffle, the stacked bearings are divided, and then the bearings are cleaned through a plurality of spray heads installed on the inner wall of the water tank; and finally, the cleaned bearing falls on a second extension plate at the tail end of a second conveying belt, a demagnetizing device and a cleaning device are separated, the purpose of demagnetizing and cleaning can be more efficiently achieved, meanwhile, a first control panel and a second control panel are installed, and intelligent control is conducted on the whole cleaning and demagnetizing process.

The utility model provides a demagnetizer for a bearing ring. The demagnetizer comprises a rack, the transmission roller conveying mechanism is arranged in the length direction of the rack; the demagnetizing mechanism is installed in the middle of the rack and arranged in the width direction of the rack and comprises a supporting frame installed on the rack, an upper magnet yoke assembly capable of ascending and descending along the supporting frame and a lower magnet yoke assembly installed on the rack and arranged right opposite to the upper magnet yoke assembly; the upper magnet yoke assembly comprises a first U-shaped magnet yoke and first coils, an opening of the first U-shaped magnet yoke faces downwards, and the first U-shaped magnet yoke is wound with two sets of parallel first coils. The lower magnet yoke assembly comprises a second U-shaped magnet yoke and second coils, an opening of the second U-shaped magnet yoke faces upwards, and two sets of parallel second coils are wound on the second U-shaped magnet yoke; the first coil and the second coil are connected in parallel. By adjusting the height of the upper magnet yoke assembly and the magnetic field intensity generated by the coil, effective demagnetization of the bearing ring is realized.

The application discloses a kind of magnetic seed induced mineral separation methods of iron ore, comprising the following steps: (1) processing mixed iron ore obtains dry magnetic separation concentrate and dry magnetic separation tailings;(2) dry magnetic separation tailings magnetization roasting obtains artificial magnetite;(3) dry magnetic separation concentrate is mixed with artificial magnetite;(4) the raw ore into mill is sent into one-stage closed-circuit grinding classification system, then enters one-stage low-intensity magnetic separation operation;(5) one-stage low-intensity magnetic rough concentrate is sent into two-stage closed-circuit grinding classification system, then enters two-stage low-intensity magnetic roughing operation;(6) two-stage low-intensity magnetic roughing concentrate is demagnetized after entering two-stage low-intensity magnetic cleaning operation by demagnetizer;(7) two-stage low-intensity magnetic cleaning concentrate is concentrated after demagnetization by demagnetizer, and iron concentrate product is obtained by flotation.The application adds natural magnetite contained in ore into artificial magnetite, which is easy to form magnetic chain with natural magnetite as core to strengthen the magnetic separation recovery of artificial magnetite, and the separation process has high iron recovery rate and high concentrate grade.

The invention discloses a preparation method of a modified nano carbon material and a lithium ion battery. Equipment for implementing the preparation method comprises a batch feeder, a jet mill and a demagnetizing machine which are sequentially arranged in the material advancing direction, and the jet mill and the demagnetizing machine are sequentially arranged from top to bottom in the height direction; the preparation method comprises the following steps: step 1, a nano carbon material and a modified material are mixed according to a mass ratio of 100: 0.1-5 and then enter a jet mill through a batch feeder, the modified material comprises a polymer and micromolecular amine, and the mass ratio of the polymer to the micromolecular amine is 100: 5-10; and step 2, after being crushed by the jet mill, the materials enter a demagnetizer in a free falling manner under the action of gravity to be demagnetized. The nano carbon material has better dispersity and lower metal impurity content.

The utility model discloses automatic demagnetization conveying equipment for a hydraulic support stand column. The automatic demagnetization conveying equipment comprises a conveying assembly. Through the combination of the transportation assembly, the demagnetizer, the transportation tray, the water collecting tank and the stand column, the hydraulic support stand column demagnetizer realizes the integrated operation from transportation to demagnetization of the hydraulic support stand column. According to the integrated design, intermediate links are reduced, the production efficiency is improved, the equipment can automatically complete demagnetization treatment of the stand column, manual intervention is reduced, meanwhile, the production safety is improved, and the trundles are fixedly installed on the left side of the bottom of the water collecting tank, so that the equipment is convenient to move and position; the transportation tray and the transportation assembly are fixedly installed, and the stability of the stand column in the conveying process is ensured; the demagnetizer is located at the top of the conveying assembly, the stand columns can be demagnetized conveniently, the equipment is suitable for hydraulic support stand columns of different specifications and sizes, high universality and adaptability are achieved, and the problem that in the stand column assembling process, a stand column demagnetizing technology and specific demagnetizing equipment are lacked is solved.

The application belongs to the technical field of elutriation equipment, and particularly relates to an electromagnetic ore dressing device, which comprises a desliming magnetic separation column, an intermediate treatment device and a cleaning magnetic separation column. The intermediate treatment device comprises a rack, an intermediate hopper, a jet device and a scattering cabin. The intermediate hopper and the jet device are fixedly connected with the rack. The concentrate discharge pipe of the desliming magnetic separation column is sequentially communicated with a harmonic wave demagnetizer and a feeding pipe. The concentrate discharged from the concentrate discharge pipe of the desliming magnetic separation column enters the intermediate hopper through the harmonic wave demagnetizer and the feeding pipe in sequence. The jet pipe of the jet device is communicated with the scattering cabin. A lining plate is arranged in the scattering cabin and oppositely arranged with the jet pipe. The scattering cabin is provided with a discharge hopper which is communicated with the ore feeding opening of the cleaning magnetic separation column through a pipeline. The short and thick desliming magnetic separation column and the slender cleaning magnetic separation column are combined, and the magnetic field and the flushing water are independently adjusted, so that the quick desliming and high-precision separation are considered, and the adaptability is high.

The utility model relates to the technical field of demagnetization equipment, and discloses a low-power-consumption demagnetizer which comprises a demagnetizer body, fixing blocks are fixedly connected to the two sides of the interior of the demagnetizer body, worm wheels are rotationally connected to the interiors of the fixing blocks, a worm is rotationally connected to one side of the interior of each fixing block, and the outer wall of each worm is meshed with the outer wall of the corresponding worm wheel. A handle is fixedly connected to one end of the worm, a sliding rod is slidably connected to one side of the interior of the fixing block, a tooth groove is formed in one side of the outer wall of the sliding rod, the outer wall of the worm wheel is meshed with the inner wall of the tooth groove, and a curved rod is rotatably connected to the top of the sliding rod. According to the demagnetizer, the curved rod can be controlled to drive the connecting plate, so that the heat dissipation plate is driven to rotate to be opened and closed, the opening angle of the heat dissipation plate is adjusted according to different environment temperatures, the problem that the heat dissipation plate is inconvenient to adapt to different scenes is solved, the applicability of the heat dissipation plate is improved, and the energy consumption of the demagnetizer is reduced.

The application discloses a kind of fine-grained vanadium-titanium iron concentrate filtration pretreatment methods, comprising the following steps: fine-grained vanadium-titanium iron concentrate and water are mixed and the mass fraction of the fine-grained vanadium-titanium iron concentrate in the obtained suspension is adjusted to predetermined concentration, obtain first slurry;First slurry is passed through demagnetizer, and demagnetization is carried out, and second slurry is obtained;Second slurry is treated with ultrasonic wave, and third slurry is obtained;Third slurry is mixed with a predetermined amount of flocculating agent and then sent into a magnetic separation column after stirring, the operating parameters of the magnetic separation column are adjusted, the height difference between the mixed slurry in the magnetic separation column cylinder and the overflow surface is controlled, and the mass fraction of fine-grained vanadium-titanium iron concentrate in the fourth slurry flowing out of the magnetic separation column is controlled to be a predetermined concentration, and the flocculating agent is prepared from corn starch;Vacuum filtration is carried out on the fourth slurry.It is beneficial to increase the agglomeration diameter of fine-grained vanadium-titanium iron concentrate particles before filtration, reduce the moisture content of the product obtained after filtration of fine-grained vanadium-titanium iron concentrate, and improve the filtration efficiency.

The bearing demagnetizing, cleaning and drying all-in-one machine comprises a protective box body, a conveying device is installed in the protective box body, a feeding opening is formed in the front side of the protective box body, a demagnetizer is installed on the front side of the protective box body, a sprayer is installed on the protective box body, a soaking box is installed in the protective box body, and a dryer is installed on the protective box body. A discharging channel is installed on the rear side of the protection box body, and an electric control box is installed on the front side of the protection box body. The bearing processing device has the beneficial effects that a bearing can be driven to pass through the inner side of the demagnetizer, the lower portion of the sprayer, the inner side of the soaking box and the lower portion of the dryer through the conveying device, operation of multiple procedures can be conducted on the bearing at a time, then the bearing processing efficiency can be improved, the bearing is driven to move through the conveying device, bearing movement can be reduced, abrasion can be reduced, and the bearing processing efficiency can be improved. The upper end of the bearing can be sprayed through the sprayer, the bearing can be soaked through the soaking box, then the bearing can be cleaned in all directions, and the quality of the bearing is guaranteed.

The application belongs to the technical field of material processing, and discloses a demagnetizer and a slurry demagnetization method. The demagnetizer comprises a fixing frame, a material pipe, a magnetic rod device, a scraper device, a power driving device and a limiting device. The material pipe is arranged on the fixing frame, and the material pipe has a material channel. The magnetic rod device comprises a rotating table and a magnetic rod connected with the rotating table. The rotating table is rotatably arranged on the fixing frame, and the magnetic rod is arranged in the material pipe. The scraper device comprises a rotating piece, a scraper and a transmission piece. The magnetic rod is arranged in a sliding hole of the scraper. The rotating piece is rotatably arranged on the rotating table, and the rotating piece is in transmission connection with the scraper through the transmission piece. The power driving device is connected with the rotating piece and drives the scraper to move axially. When the limiting device is in a first position, the rotating table is fixed on the rotating piece through the limiting device. When the limiting device is in a second position, the rotating table is fixed on the fixing frame through the limiting device. The demagnetizer does not need to reserve lifting space of a scraper driving shaft above the demagnetizer, so that the overall height of the demagnetizer can be reduced.

The invention discloses a demagnetizing and filtering trolley, and relates to the technical field of circulating water filtration, the demagnetizing and filtering trolley comprises a trolley body and a demagnetizing device, ball valves are symmetrically arranged right above the trolley body, the output ends of the ball valves are connected with injection pipe fittings, the outer sides of the injection pipe fittings are connected with a supporting frame, the supporting frame is arranged right above the trolley body, and the demagnetizing device is arranged on the trolley body. A circulation mechanism is arranged over the vehicle body and drives liquid to flow through the demagnetizer, and a high-intensity magnetic field environment is constructed through a built-in magnet assembly of the circulation mechanism. When slag needs to be discharged, power is cut off to demagnetize the magnet assembly, and under the action of fluid pressure or gravity, metal particles adsorbed on the surface of the magnet flow to the blow-down valve along with liquid to complete impurity emptying operation. The circulating mechanism drives the liquid to continuously flow through the demagnetizer to form a circulating flow path, so that ferromagnetic impurities in the liquid have more opportunities to be in contact with a high-intensity magnetic field area, the demagnetizing effect is further improved, and it is ensured that the ferromagnetic impurities in the liquid are fully adsorbed.

The utility model discloses an I-type airflow pulverization pipeline demagnetizer, which belongs to the technical field of pipeline demagnetization, and adopts the technical scheme that the I-type airflow pulverization pipeline demagnetizer comprises a feed port and a discharge port, a plurality of magnetic bars are arranged between the feed port and the discharge port, the feed port comprises a first fixed end and a first connecting end, and the first fixed end is connected with the discharge port. The first connecting end is connected with a first fixing disc through threads, the first fixing disc is provided with a first connecting hole, the discharging port comprises a second fixing end and a second connecting end, the second connecting end is connected with a second fixing disc through threads, the second fixing disc is provided with a second connecting hole, and the second connecting end is provided with a second connecting hole. The two ends of the magnetic bar are each provided with an inserting rod, and the inserting rods are connected with the first connecting holes and the second connecting holes in an inserted mode. The device is easy to operate and convenient to disassemble and assemble, the installation time is saved, and the demagnetizing efficiency is improved. According to the device, rapid assembly and disassembly are achieved, operation is easy and convenient, demagnetization can be rapidly conducted, and the demagnetization efficiency is improved.

The utility model belongs to the technical field of degaussing equipment, and discloses electronic product degaussing equipment which comprises a working table, a collecting assembly is installed on the right side of the working table, and a U-shaped frame is installed on the top of the working table. By arranging the rotating assembly, an electronic product is placed between the two clamping plates, the two clamping plates clamp and fix the electronic product under the action of the spring rod, the electronic product is conveyed to the right side under the action of the conveying belt, and when the electronic product moves to the position of the U-shaped frame, the limiting wheel rotates under the action of the limiting plate; the two adjusting plates drive the electronic product to rotate slowly through the two clamping plates, the electronic product is demagnetized when the electronic product moves to the position below the demagnetizer, the electronic product can be demagnetized more comprehensively, comprehensive demagnetization of the electronic product can be completed after the electronic product passes through the demagnetizer once, and the demagnetization efficiency of the electronic product is improved. And the demagnetization efficiency of the device on the electronic product is improved.

The utility model provides a bearing demagnetization device, which belongs to the field of bearing demagnetization processing equipment, and comprises supports, the supports are symmetrically arranged, the supports are connected with a conveying assembly, the conveying assembly is connected with a limiting clamping assembly, and the supports are connected with a frame type demagnetizer. Then, the clamping plate at one end is pulled, when the clamping plate is pulled, the clamping plate drives the connecting rod to slide in the through hole, one end of the connecting rod extrudes the spring, the clamping plate is used for clamping and fixing materials needing to be clamped, and when the clamping plate is loosened, the spring rebounds to release pressure, the connecting rod is pulled back, and the materials needing to be clamped are clamped and fixed. A clamping plate connected to a connecting rod is attached to the surface of a material needing to be demagnetized, the material is clamped and fixed, after the material is clamped to a limiting clamping assembly, a driving motor is started, the output end of the driving motor drives a rotating shaft to rotate, the rotating shaft drives a chain wheel to rotate, the chain wheel drives a synchronous belt to move, and the synchronous belt drives a placement plate to move.

The utility model relates to the field of aluminum foil production, in particular to a magnetic substance winding and removing device of a splitting machine, which comprises a support, a winding roller is arranged in the support, and limiting grooves are arranged at two ends of the winding roller on the support. The pressing frame is locked through the locking frame, the rotating sleeve pushes the winding roller to abut against the position between the first supporting wheel and the second supporting wheel through the overturned pressing frame, then rapid fixing of the winding roller is completed, and the overturning air cylinder drives the frame type demagnetizer to overturn so as to demagnetize aluminum foil wound on the winding roller. The frame type demagnetizer is arranged on the frame type demagnetizer, magnetic substances attached to the top of the aluminum foil lose magnetism, the magnetic substances on the top of the aluminum foil fall off along with rotation of the winding roller, meanwhile, the electromagnetic block on the frame type demagnetizer is used for adsorbing the bottom of the aluminum foil to be wound, and therefore the magnetic substances on the bottom of the aluminum foil are removed and prevented from being wound into an aluminum coil.

1. The name of the design product: Magnetizer and Demagnetizer (T6). 2. The use of the design product: For magnetizing or demagnetizing hardware tools such as screwdrivers and ratchets. 3. The design key points of the design product: Lies in the shape. 4. The picture or photo that best shows the design key points: Perspective view 1 of Design 1. 5. Design 1 is designated as the basic design.

The present invention relates to an apparatus for demagnetizing magnetized magnetic particles. The apparatus demagnetizes and disperses magnetic particles to increase the probability of detecting the magnetic particles. The apparatus includes (a) multi-well plate with single or multiple wells arranged, (b) magnetic particles dispensed into the multi-well plate, and (c) a support means supporting the multi-well plate. A demagnetizer capable of moving up and down is provided below the support means. The support means includes a seesaw-type shake

The utility model relates to an ultra-pure polymer circulating, homogenizing and demagnetizing system which comprises a homogenizing stock bin, and a discharge port of the homogenizing stock bin is connected with a feed end of an automatic demagnetizing device through a pipeline; the discharging end of the automatic demagnetizing device is provided with two branch pipes, and the branch pipes comprise a qualified material output branch and a finished product collecting unit, and the circulating branch is communicated with the homogenizing stock bin through a material returning pipeline and is used for returning the substandard materials to the homogenizing stock bin for secondary homogenizing and demagnetizing treatment. Compared with the prior art, the system has the advantages that the automatic demagnetizing device and the circulating branch are arranged in the system, so that efficient, continuous and clean industrial production is realized, and the system is particularly suitable for large-scale production of high-end polyolefin products such as ultra-clean high-purity polyethylene.

1. Name of the product in this design: Demagnetizer. 2. Purpose of this design: To demagnetize metal products. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the key design points: Design 1 3D view. 5. Design 1 is designated as the basic design.

The invention relates to the technical field of demagnetization equipment, in particular to a height-adjustable support for a demagnetizer, which comprises a seat stand, a bearing seat and a supporting rod, the bearing seat is used for placing the demagnetizer, a baffle is arranged on one side of the bearing seat, a coil hole faces the baffle when the demagnetizer is placed on the bearing seat, and the supporting rod is arranged on the bearing seat. The end, provided with the baffle, of the bearing seat is connected with the seat stand, the bottom of the end, away from the baffle, of the bearing seat is connected with one end of the supporting rod, the other end of the supporting rod is connected with the seat stand, and the bearing seat and the horizontal plane form an inclined angle. The bearing seat has an inclination angle, the permanent magnet alloy descends to penetrate through the coil hole under the action of self gravity in the demagnetization process, the permanent magnet alloy does not need to be pushed out by a tool, and the demagnetization efficiency is improved.

The utility model relates to the technical field of carbon black production, in particular to a carbon black packaging device. In order to solve the problem that an existing carbon black packaging device is prone to material blockage, the novel carbon black packaging device comprises a PLC control system, a finished product bin, a flexible connector, a vibrating screen, an automatic demagnetizing device, an intermediate storage tank and a packaging machine, the finished product bin, the flexible connector, the vibrating screen, the automatic demagnetizing device, the intermediate storage tank and the packaging machine are sequentially connected from top to bottom, the intermediate storage tank is provided with a weighing device, and an automatic control valve is arranged at an outlet in the bottom of the finished product bin. The input end of the PLC control system is connected with the weighing device, and the output end of the PLC control system is connected with the automatic control valve and the vibrating screen. According to the carbon black packaging device, the middle storage tank and the PLC control system are additionally arranged, so that the problems that a carbon black system stops and equipment is damaged due to material congestion are solved, and the availability of the equipment is improved.

The invention discloses a passive portable generator rotor large shaft demagnetizer and a demagnetization method thereof, and belongs to the technical field of generator maintenance. The demagnetizer comprises a closed-loop coil composed of a superconducting flexible cable, a hand-operated rotary permanent magnet excitation device, a refrigerant and a detection device. The zero resistance characteristic and the flux pump effect of the superconducting material are utilized, and a demagnetizing magnetic field is generated for charging and discharging of the coil through the hand-cranking permanent magnet. The refrigerant system maintains a superconducting state, and the detection device monitors residual magnetism. During demagnetization, the coil is cooled firstly, after residual magnetism is detected, a proper coil is selected for installation, current charging and discharging are controlled, and attenuation is conducted according to stages till the residual magnetism reaches the standard. The demagnetizer gets rid of dependence on a heavy power supply and a connecting line thereof, is convenient to move to a plurality of units for overhaul and overhaul during power failure, is small in volume and mass, and facilitates demagnetization operation in a narrow space of an on-site generator.

The present invention discloses a fully automatic ultrasonic and magnetic powder synchronous nondestructive testing system and method for bearing rings, belonging to the technical field of bearing nondestructive testing. The testing system comprises: a main testing system, a demagnetizer, a truss robot arm, and an electric control cabinet; the main testing system comprises a testing module, a motion module, a hanging rod module, a jacket module, a magnetic yoke, a lifting module, a magnetic fluid nozzle, and a liquid collection tank; the testing module comprises a movable and controllable visual component and an ultrasonic component; the bearing ring is hung on a rotating hanging rod shaft in the hanging rod module and limited in position. The system can perform nondestructive testing on all surfaces and interiors of the rotating bearing ring, using a demagnetizer for pre- and post-test demagnetization, and using a truss robot arm to transfer the bearing ring, and achieving fully automatic testing through a control method. The present invention solves the technical problem that existing solutions are difficult to automatically and simultaneously perform nondestructive testing on all surface and internal defects of large bearing rings, and is capable of testing bearing rings of a wide range of sizes.

The present invention discloses a fully automatic intelligent demagnetizer integrating magnetic flux detection, which includes a product transmission line; a first lifting device and a second lifting device are also arranged at intervals in the middle of the product transmission line; a demagnetizing device is also arranged on one side of the product transmission line near the first lifting device, and a magnetic flux detection device is also arranged on one side of the product transmission line near the second lifting device; the demagnetizing device includes a demagnetizing mounting frame arranged on one side of the product transmission line, a demagnetizing lifting mechanism mounted on one side of the demagnetizing mounting frame, a demagnetizing lifting frame connected to the demagnetizing lifting mechanism, and a demagnetizing coil module mounted on the demagnetizing lifting frame and located above the first lifting device; a residual magnetic detection mechanism is also mounted on one side of the demagnetizing lifting frame. The present invention can realize a series of processes such as automatic feeding, demagnetization, magnetic flux detection and blanking of products, with high automation degree and high working efficiency.