144 results about "Demagnetizer" patented technology

The invention relates to an intelligent cash register. A customer scans bar codes of selected commodities one by one on a self-service bar code scanning settlement platform to make settlement, and then places the scanned commodities on a detecting and checking device one by one, each commodity is identified, detected and checked automatically by the commodity detecting and checking device till the customer confirms that settlement is completed, a display screen of the settlement platform provides a sum of settlement, text and voice prompts are provided to ask the customer to make self-service payment in a payment cabinet, the commodity detecting and checking device sends commodities settled by the customer to a conveyer belt to prepare for demagnetization, after payment success of the customer, a payment cabinet system prints a shopping bill automatically, the system opens a shield door in an outlet of a packaging platform to convey the commodities to a demagnetizer for demagnetization, the commodities are sent to the packing platform, the customer is prompted to go to the packing platform to pack the commodities in a self-service manner, and if a customer selects a shopping bag, a shopping bag vending machine under the payment cabinet sends out the shopping bag selected by the customer automatically.

A compact electric device for magnetizing and demagnetizing metal shafts, screwdrivers, or metallic tools using stored electrical energy. Handheld portable versions are illustrated (see FIGS. 1, 1A, 2, and 2A). The end of a metal shaft, or screwdriver shaft, or other said instrument is placed in (see FIGS. 3 and 6) a receiving cavity or socket (96) which is the hollow center within two coils L1 (80) and L2 (82). The operator of the device chooses either demagnetization or magnetization via a switch (86), presses an action switch (88), and electric current flows through the coils and the rest of the device in a precise way to produce the desired effect of either magnetization or demagnetization. The inserted metal shaft or other said instrument may then be removed from the receiving cavity and is now either magnetized or demagnetized. Electric power is provided by one of three methods: hand-powered push lever AC power generator, DC batteries, or AC / DC converter connected to an external power connector (94). The application range of the hand-held electric magnetizer / demagnetizer is wider.

A demagnetizer for an inductive load having a driver circuit including at least one transistor and a ramp-down voltage source switchably connected to the driver circuit, so that when the ramp-down voltage source is connected to the transistor, it drives the voltage of the transistor below its threshold voltage.

The invention belongs to the technical field of iron ore grading and especially relates to a hematite roasting, stage grinding, intermediate magnetic separation, fineness classifying, gravity concentration-magnetic separation technique, comprising raw ore roasting, first segment of closed loop grinding, primary grading, intermediate magnetic separation, fineness classifying and gravity concentration-magnetic separation. The technique is characterized by feeding the intermediate magnetic separation concentrate in a demagnetizer, grading the concentrate through fineness classifying, grading the material into rough granule level product and fine granule level product, feeding the rough granule level product in the fineness classifying procedure in a helical chute, demagnetizing the concentrate in the helical chute and performing screening procedure on the concentrate, serving the tailings in the helical chute and the oversize product in the screening procedure as middlings, performing secondary grading and second segment of closed loop grinding procedures on the middlings, and feeding the fine granule parts in the fineness classifying procedure in a dehydration tank, a permanent magnetic machine and a magnetic field screening machine to perform magnetic separation procedure. The comprehensive concentrate is composed of screening concentrate and magnetic field screening machine concentrate, and the compressive tailings are composed of intermediate magnetic separation tailings, dehydration tank tailings, permanent magnetic machine tailings and magnetic field screening machine tailings. The technique has the advantages that the sorting efficiency of the whole procedure is improved, the screening concentrate in rough granule procedure and the magnetic field screening machine concentrate in fine granule procedure can reach 65-67%, the level of the comprehensive concentrate is higher than 65-67%, and the level of the compressive tailings is reduced to 8-10%.

A fast-cleaning electromagnetic iron removing machine comprises a rack, an inner cylinder, a feeding port, a discharging port, electromagnetic coils, a heat dissipation tank, a demagnetizer and a power supply, wherein the inner cylinder is mounted on the rack; the outer side of the inner cylinder is wound with the electromagnetic coils; the feeding port is formed in the lower end of the inner cylinder; the discharging port is formed in the upper end of the inner cylinder; soft magnetic nets are arranged in the inner cylinder and mounted on a vibration pole; a vibration motor is connected onto the vibration pole; an elastic connector is arranged between the vibration motor and the inner cylinder; a water inlet is formed in the top end of the inner cylinder; and a slag removing port is formed in the bottom of the inner cylinder. Besides, the demagnetizer is used for eliminating magnetism of the soft magnetic nets and ferromagnetic slag absorbed on the soft magnetic nets during soft magnetic net cleaning, the electromagnetic coils are sealed in the heat dissipation tank, and a liquid is injected into the heat dissipation tank for cooling the electromagnetic coils. The fast-cleaning electromagnetic iron removing machine is equipped with the demagnetizer, water spray devices are arranged at the top end of the inner cylinder, and the vibration device is connected onto the soft magnetic nets, so that the cleaning is convenient and fast.

The invention relates to a pipeline demagnetizer based on a permanent magnet structure and application of the pipeline demagnetizer. The pipeline demagnetizer comprises a center piece and permanent magnets distributed on the center piece, wherein magnetic fields with alternatively varied directions are formed in the wall of the pipeline in the axial direction from front to back; the intensity of the magnetic field is decreased gradually; the demagnetizer can adopt a built-in structure or a built-out structure and is applied for pipeline demagnetization. Compared with the prior art, the pipeline demagnetizer has the advantage that a group of steady alternative attenuation magnetic fields are formed in space, and the magnetized pipeline and the group of alternative attenuation magnetic fields have relative displacement in space, so that the wall of the pipeline goes through the group of alternative attenuation magnetic fields, therefore, the purpose of demagnetization can be achieved.

The invention discloses a battery cathode material mixing device with a demagnetizer. The battery cathode material mixing device comprises a damping base, a mixing chamber is arranged at the top of the damping base, a discharge pipe and a second additive inlet pipe are arranged on the right side of the mixing chamber, a first additive inlet pipe is arranged on the left side of the mixing chamber, and the top of the mixing chamber is provided with a motor cover and a feed port. The battery cathode material mixing device is simple in structure, reasonable in design and convenient to use, materials enter the device through a feed pipe, crushed qualified materials are filtered by a filter plate after being crushed by a first crushing shaft and a second crushing shaft, and the materials are demagnetized in a demagnetizing pipe for the first time and uniformly scattered under the action of a scattering device to contact with the left inner wall and the right inner wall of the demagnetizing pipe, so that the materials are more thoroughly demagnetized. The materials fall onto the demagnetizer and are secondarily demagnetize, so that the materials are more rapidly demagnetized, demagnetizing effects are better, and the materials are conveyed into the mixing chamber through the feed port and stirred and mixed with additives.

The invention relates to a demagnetizer and a demagnetization method thereof. The demagnetizer comprises a coil or a coil assembly which can work together with a magnetizing power supply to generate a demagnetizing field attenuating gradually, and a material box which can rotate at an adjustable speed is arranged in the coil or coil assembly in a penetrating way. In the prior art, a natural attenuation pulse mode is used for demagnetization; since a generated alternating magnetic field rapidly attenuates and the residual magnetic induction intensity on the surface of the magnetic material subjected to the action of the alternating magnetic field is not less than 30Gs, the technical defect of unsatisfied demagnetization effect can be caused. By the adoption of the demagnetization method provided by the invention, the technical defect can be overcome. The demagnetizer provided by the invention can achieve ideal demagnetization effect by utilizing high electric energy wave once, and more than 95% of electric energy can be saved.

The invention discloses a conjugated pipeline demagnetizer. The conjugated pipeline demagnetizer comprises a switching circuit, a control circuit, a drive circuit and a demagnetizing coil. The switching circuit provides direct current for pipeline demagnetization for the demagnetizing coil. A singlechip is arranged in the control circuit. The drive circuit drives a power switching device in the switching circuit. The switching circuit is formed by sequentially connecting a power grid filter circuit, a first rectification filter circuit, a power conversion circuit, and a second rectification filter circuit. The demagnetizing coil is made from flexible wire and an explosion-proof aviation plug is adopted for connection. The conjugated pipeline demagnetizer has the advantages of high demagnetization and self-shielded characteristic, good adaptability of terminal, and energy conversation and security.

The invention discloses a demagnetization circuit, a demagnetizer, and a control method for the demagnetization circuit. A circuit part comprises a trigger control module, an adjusting module, a boostmodule, a rectification filtering module, and at least a demagnetization module. The demagnetization module is connected with the boost module through the rectification filtering module. The boost module makes input voltage of an external power supply boost. The rectification filtering module converts current of the boost module to direct current from alternating current, and filters. The triggercontrol module is connected with the demagnetization module through the adjusting module. The trigger control module controls a trigger timing sequence of the demagnetization module through the adjusting module. The demagnetizer solves technical problems that a conventional demagnetizer has small demagnetization range, has large demagnetization capability difference on orientations of antitheft labels, and cannot effectively demagnetize the antitheft labels which are on different positions and direction at the same time.

The invention discloses a power supply device for demagnetizer, which comprises an inverter, a rectifier circuit, a capacitor and a switching circuit; the power supply input end of the inverter is connected with a low voltage dc power supply, and the high voltage ac power supply output end thereof is connected with the ac power supply input end of the rectifier circuit; the inverter is used for inverting low voltage dc into high voltage ac for demagnetization; the anode of the capacitor is connected or disconnected with the anode of a high voltage pulse dc power supply output by the rectifier circuit through the switching circuit; the cathode of the capacitor is connected with the cathode of the high voltage pulse dc power supply output by rectifier circuit; meanwhile, the anode of the capacitor is disconnected or connected with the anode output end of the power supply device through the switching circuit; the cathode of the capacitor is also connected with the cathode output end of the power supply device. As the work power supply of the invention is a low voltage dc power supply, the power supply device can invert the low voltage dc into high voltage ac for demagnetization; thereby, when the power supply device for demagnetizer is mounted on a demagnetizer, the demagnetizer is ensured to operate in any working environment.