42results about How to "Good degaussing effect" patented technology

The invention relates to a workpiece demagnetizing method and a workpiece demagnetizing device. The method selects a square wave signal with unchanged frequency and amplitude; an amplifying circuit and a push-pull circuit are connected into a drive circuit; and the drive circuit is connected with a coil. Corresponding to the method, the demagnetizing device mainly comprises a power supply, a signal generator, a driver and a coil. An unfading alternating magnetic field generated by the method and the device can not only demagnetize a static workpiece but also can carry out continuous demagnetization on a dynamic workpiece and have wide application range; a ferrite is adopted as a magnetic core; demagnetizing current with high frequency and unchanged amplitude is conducted to the coil; the alternating magnetic field generated by the coil can disturb the residual magnetic domain of the workpiece; the demagnetizing effect is good; and the method is simple and feasible and the device has a compact structure so as to solve the difficult problem of demagnetization in the field and have practical value.

The invention discloses a conveyer belt multi-pole magnetic roller asynchronous demagnetizing device, which comprises a multi-pole magnetic roller (1), a magnetic roller drive motor (5), a magnetic roller framework (18), a structural frame (10), a lifting device and a controller (12), wherein the multi-pole magnetic roller is hang on the magnetic roller framework through a magnetic roller shaft, the magnetic roller drive motor drives a magnetic roller shaft transmission belt wheel (2) to rotate through a power belt wheel (4) and a transmission belt (3) so as to drive the multi-pole magnetic roller to rotate, and the multi-pole magnetic roller is positioned above a conveyer belt (6); the structural frame is positioned above a conveyer belt return plane, and a vertical bar of the structural frame is fixed on the ground; and one end of the magnetic roller framework is connected on the vertical bar of the structural frame through a rotating shaft (11), the other end of the magnetic roller framework is provided with the hoisting device, an upper stop point (17) and a lower stop point (1) with travel switches are formed on the vertical bar at the other end of the structural frame, the output of the travel switches is connected with a controller (12), and the controller controls the magnetic roller drive motor and the hoisting device. The demagnetizing device has the advantages of simple structure, low energy consumption and good demagnetizing effect.

The invention discloses a method and a device for demagnetizing a steel wire conveying belt without energy consumption. The method comprises the following steps of: a) allowing the moving direction of the steel wire conveying belt to get into an alternating magnetic field formed by a demagnetizing plate, wherein the distance between the demagnetizing plate and the steel wire conveying belt can be adjusted; b) adjusting the distance between the demagnetizing plate and the steel wire conveying belt, and measuring the magnetic field intensity on the back surface of the steel wire conveying belt, if the measured value of the magnetic field intensity is more than 200 Gs, the distance is qualified; c) adjusting the distance that the steel wire conveying belt departs from the demagnetizing plate, acquiring a detection signal through a metal detector, inputting the detection signal into an oscillometer, and observing whether interference pulse exists or not and the peak value of interference pulse wave, if a waveform curve is flat, demagnetization is qualified, and when the waveform curve is abnormal, adjusting the current distance until the detection signal is qualified; and d) after adjusting the current distance until the detection signal is qualified, starting a steel wire conveying belt machine set to perform demagnetizing operation, wherein in the process, the metal detector extracts the detection signal to analyze the whole periphery of the conveying belt to judge a demagnetizing effect. The problem about demagnetizing the steel wire conveying belt is solved by the method and the device, and the method and the device have the characteristics of no maintenance, energy conservation and the like.

The invention provides a method and a system for degaussing a power transformer. According to the method, after direct resistance of the power transformer is tested, a residual magnetic flux of the power transformer is obtained by a saturated magnetic flux and framework wire wrapping coefficients of the power transformer; a counter magnetic flux of the residual magnetic flux is obtained according to the magnitude and the polarity of the residual magnetic flux; the counter magnetic flux is added to the power transformer, and the aim of degaussing the residual magnetic flux is realized by the property that the direction of a transient state magnetic flux in the counter magnetic flux is opposite to that of the residual magnetic flux. According to the method and the system for degaussing the power transformer, the magnitude and the polarity of the residual magnetic flux in the power transformer are firstly estimated, and a counter magnetic flux technological means is added to realize effective degaussing of the residual magnetic flux; the degaussing effect is obvious, and the problems in the prior art are solved.

The invention discloses a transformer demagnetization analyzer. The transformer demagnetization analyzer comprises a first direct-current residual magnetism analysis demagnetization output terminal, a second direct-current residual magnetism analysis demagnetization output terminal, a power supply direction switching module, a direct-current numerical control constant current source, a first optical isolator acquisition resistor Rb, a switch K1, a microprocessor, a reverse electromotive force protection module, a first program-controlled amplifier, a first A/D converter, a first optical isolator connection, a second program-controlled amplifier, a second A/D converter, a second optical isolator, an instruction input module, a display module, an alternating-current residual magnetism analysis output terminal, a voltage and current test module, an isolated boost transformer and an electric voltage regulator. The transformer demagnetization analyzer realizes the technical effects that the transformer demagnetization analyzer is capable of carrying out demagnetization and also can detect the residual magnetism amount of the transformer, the demagnetization effect is good, and the demagnetization efficiency is relatively high.

The invention provides a degaussing cable trough, a laying device for a ship cable and a cable laying method and relates to the technical field of cable laying. The degaussing cable trough comprises a cable trough body, a cover board and a cable fastening hook for fixing the cable, wherein the section of the cable trough body is rectangular and an opening is formed in the top; the cover board covers the opening in the top of the cable trough body; the cable fastening hook is internally arranged in the cable trough body and comprises a U-shaped bracket and two opposite and parallel lifting rods; the U-shaped bracket is formed by two vertical bars and a bottom bar; two grooves are formed in the inner side of each lifting rod and are correspondingly limited in the outer ends of the two vertical bars; and the two lifting rods are connected through a fastener. The laying device for the ship cable is formed by connecting a plurality of degaussing cable troughs and two adjacent degaussing cable troughs are connected through one sleeve. The cable laying method is implemented by adopting the laying device for the ship cable. The cable laying work of a constructor can be greatly facilitated through laying the cable in each cable trough body, and a scratched injury to the cable is reduced.

The invention relates to a low frequency degaussing power supply. The low frequency degaussing power supply is characterized by comprising a three-phase alternating current power supply, a three-phasebridge rectifier circuit, a filter circuit, a bridge low frequency inverter circuit. The three-phase alternating current power supply is connected with an input end of the three-phase bridge rectifier circuit. An output end of the three-phase bridge rectifier circuit is connected with an input end of the filter circuit. The output end of the filter circuit is connected with the input end of the bridge low frequency inverter circuit. The output end of the bridge low frequency inverter circuit is connected with a primary side of a transformer. According to the low frequency degaussing power supply, degaussing is carried out through adoption of the low frequency power supply. Compared with power frequency degaussing, the power supply has the advantage that a size is greatly reduced. A degaussing effect reaches a level of alternating current degaussing. The degaussing effect is good. An equipment size is small. Efficient degaussing of a large-scale power transformer can be realized.

The related degaussing method for spiral weld pipe mainly applies magnetic field with reverse direction to magnetic field generating welding current to take coarse degaussing and fine degaussing. Besides, the relative equipment comprises a degaussing transformer, a contact voltage regulator, a bridge rectifier, and a coil. The residual magnetic field is less 10Gs. This invention has well both economic and social benefits.

The invention relates to a system for improving the adhesion force of a train wheel rail. The system comprises a control device (1), an excitation power supply (2), a wheel tread electromagnetic device (3) and a pneumatic pushing device (4); when a train is subjected to traction or braking, the control device (1) controls pressure air to be input into the pneumatic pushing device (4) and the wheeltread electromagnetic device (3) is pushed to get close to a wheel tread; meanwhile, an instruction is sent to the excitation power supply (2) and needed excitation current is output to the wheel tread electromagnetic device (3) to form a magnetic field nearby the rotary train wheel tread; an eddy flow is generated on the tread and an adsorption force on a steel rail is generated; meanwhile, thesurface of the train wheel tread is magnetized; meanwhile, the adsorption force on the steel rail tread is increased through the train wheel tread; the effect of increasing the adsorption force on a train wheel is realized under the condition of an adhesion coefficient between the wheel rails. Compared with the prior art, the system provided by the invention has the advantages that the system is convenient to mount, the adhesion force of the wheel rail is remarkably improved, damages to the steel rail and the wheel are not caused and the like.

The invention discloses a circuit board detection device. The technical scheme mainly includes that the circuit board detection device comprises a framework; a worktable is arranged on the framework,a bottom plate is arranged on the worktable, and probes for detecting a circuit board are arranged on the bottom plate. The circuit board detection device is characterized in that an arranging plate for placing the circuit board is slidably connected onto the bottom plate, a pressure plate for pushing the circuit board is arranged on the framework and is positioned above the arranging plate, firstarranging grooves and second arranging grooves are formed in the arranging plate, the first arranging grooves are matched with the outer contour of a power panel, and the second arranging grooves arematched with a control panel. The circuit board detection device has the advantages that the first arranging grooves and the second arranging grooves are formed in the arranging plate, the power panel and the control panel can be placed on the arranging plate at the moment, accordingly, corresponding functions can be detected, the power panel and the control panel can be detected by the single circuit board detection device at the moment, and the adaptability of the circuit board detection device can be improved; equipment on production lines does not need to be frequently replaced, accordingly, the work efficiency can be improved, and the production cost can be reduced.

The invention relates to power cast iron production, namely, non-magnetic cast iron. The non-magnetic cast iron comprises the following chemical components in percentage by mass: 66% of pig iron, 12% of ferro-manganese, 3% of silicon iron, 16% of copper and 3% of nickel. According to the scheme, the non-magnetic cast iron is prepared by adding different raw materials at different temperatures and finally performing quenching treatment. The cast iron is free of magnetism and can be used in power fittings, particularly used in insulators, and has a better use effect. In the production process, different raw materials are added at different temperatures, the melting effect is good, the demagnetization effect is good, and qualified non-magnetic cast iron can be obtained.

The invention relates to a super magnetic sewage purifying system and process, and belongs to the field of sewage treatment. The super magnetic sewage purifying system comprises a coarse-fine screen 1, a primary settling tank 2, a stirring-mixing reactor 3, a super magnetic purifier 4, an MBR (Membrane Bioreactor) membrane filter 5, an active carbon abdsorber 6, a clean water pond 7, a dispersionreducer 8, a residual magnetism eliminator 9, a superparamagnetic doser 10 and a concentrated dehydrator 11. The super magnetic sewage purifying system has the advantages of simple process, high treatment efficiency, low investment, quick response, no constraint on geographic position, small influences of environment factors, ready availability of raw materials, small floor area and convenience inpractical application.

The invention discloses a degaussing cable for a naval vessel. The degaussing cable comprises a conductor in the middle of the cable, wherein an aluminum foil mask tape is wrapped outside the conductor; and a low-smoke halogen-free and flame-retardant insulating layer is extruded outside the aluminum foil mask tape. According to the degaussing cable, the degaussing effect can be enhanced effectively, the outer diameter and weight of a product are reduced, and convenience is brought to pavement of the product; the insulating layer is made of a low-smoke halogen-free and flame-retardant crosslinking material, so that the cable carrying capacity, working temperature level and physical and mechanical properties are enhanced greatly, and the running power of the cable is raised remarkably; meanwhile, compared with an ordinary degaussing cable, the cable disclosed by the invention has the advantages that: only a small amount of low-smoke and nontoxic gas is produced during combustion, and the cable belongs to an environmentally-friendly product; and meanwhile, a thin copper soft wire with a high-electric-conductivity clad layer is adopted, so that the corrosion resistance and oxidation resistance of a copper conductor are enhanced.

The invention discloses a turnover degaussing device for a computer hard disk, and relates to the field of computer hard disk degaussing. The turnover degaussing device comprises a processing box, a control box is fixedly mounted on the side of the processing box, a box cover is rotatably mounted on the top of the processing box, a degaussing box with a built-in degaussing coil is fixedly mounted in the processing box, baffles are rotationally installed on the inner walls of the two sides, away from each other, of the processing box, the two baffles are located under the degaussing box and matched with each other, and the same electric push rod is rotationally installed on the inner walls of the two sides, away from each other, of the processing box and the bottoms of the two baffles. According to the turnover degaussing device for the computer hard disk, through the arrangement of a degaussing part, full degaussing processing can be carried out on different types of computer hard disks, the degaussing effect is good, the application range is wide, through the arrangement of a smashing part, the degaussed computer hard disks can be thoroughly smashed, the phenomenon that hard disk information is possibly recovered is avoided, and the practicability of the device is improved.

The invention belongs to the technical field of degaussing, and relates to an automatically controlled direct current degaussing device and method for eliminating a welding seam magnetic field in the butt welding process of large steel plates in the industrial production. In the degaussing device, a pair of degaussing heads (1) are movably arranged at the front end of a welding machine, are symmetrically arranged at the two sides of a to-be-welded edge seam, and are connected with a positive electrode and a negative electrode of a programmable power supply (2), and the programmable power supply (2) supplies power through commercial power, so that a direct-current strong magnetic field is generated between the two demagnetizing heads (1). A Gauss meter (3) is connected with a PLC (4) through a serial port and is used for collecting the magnetic field data of the to-be-welded edge seam and transmitting the magnetic field data to the PLC (4), the PLC (4) controls the programmable power supply (2) to output a current through the program operation to enable the demagnetizing heads (1) to generate a needed demagnetizing magnetic field, the magnetic field of the welding seam (6) of a steel plate (5) is counteracted before welding, and therefore it is guaranteed that the magnetic field at the welding seam of the large steel plate meets the set requirement. The degaussing device is easy to operate and is suitable for the automatic control over the magnetic field in the large steel plate butt welding process.