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

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 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 discloses a degaussing coil device for a ferrite-permalloy composite magnetic shielding barrel, which is a low-noise magnetic coil device especially suitable for ultra-high sensitive atomic magnetometers, atomic gyroscopes and other quantum precision measurement fields. The degaussing coil structure of the shielding barrel. The present invention is aimed at the composite magnetic shielding barrel composed of two different magnetic material magnetic shielding barrels. The shielding layers of the two different materials are separated and the degaussing coils are arranged separately, and then the degaussing lines are connected in series. In the shielding layer, synchronous degaussing replaces the commonly used solenoid degaussing coil or ring-wound degaussing coil. Among them, the circumferential and axial combined wiring is carried out for the inner ferrite shielding layer with low magnetic permeability that is not easy to demagnetize, which enhances the degaussing effect and solves the problem that the ferrite magnetic shielding barrel is not easy to demagnetize. The coil structure provides a better demagnetization effect, reduces the residual magnetism after demagnetization of the composite magnetic shielding bucket, and reduces the magnetic field gradient caused by the residual magnetism inside the magnetic shielding bucket.

The invention relates to a demagnetizing method and device, and in particular relates to a demagnetizing method and device for a steel wire lining conveyer belt by double magnetic rollers. The demagnetizing method for the steel wire lining conveyer belt by double magnetic rollers comprises the steps of: placing two demagnetizing rollers (1 and 7) respectively above and below the steel wire lining conveyer belt (5), wherein the demagnetizing rollers are multiple-magnetic-pole magnetic rollers with adjacent heterospoles, and the diameters of the demagnetizing rollers are the same, the numbers of the magnetic poles are equal, and the magnetic densities are the same. The two demagnetizing rollers are synchronous at the same speed and rotate in opposite directions (2 and 6), and the heterospoles of the two demagnetizing rollers which rotate synchronously are opposite to each other; and the steel wire (4) lining conveyer belt moves. According to the demagnetizing method and device for the steel wire lining conveyer belt by the double magnetic rollers provided by the invention, the demagnetizing magnetic field is an alternating magnetic field which penetrates through the conveyer belt. The demagnetizing device provided by the invention is simple and compact in structure and easy to implement. Through field conduct and use, the lining steel wire of the demagnetized steel wire lining conveyer belt can be penetrated through more than 10mm, so that a demagnetizing effect is remarkable.

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 structuralframe 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 rollerframework 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 for preparing skutterudite preheated cement, which belongs to the technical field of cement preparation. A method for preparing skutterudite preheated cement utilizes double degaussing components in a powerful degaussing cylinder to demagnetize cement at high temperature and demagnetize cement, namely The high-temperature heat storage heat conduction tube and the serpentine conductive column perform high-temperature autoclaving and "ionization" on the falling cement raw materials respectively, and demagnetize the magnetic substances in the cement raw materials, and the high-temperature degaussing and power-on degaussing are carried out at the same time to achieve double enhanced demagnetization. Purpose: When the degaussed cement raw material falls to the lower end of the powerful degaussing cylinder, use the miniature magnetic detector installed at the side end of the leaking material connection pipe to detect the content of magnetic substances inside, so as to ensure that the content of magnetic substances in the cement raw material is reduced to the minimum. Prepare qualified cement raw materials into cement, basically eliminate the influence of magnetic substances on cement quality, significantly improve the stability of cement buildings, and improve the safety factor of high-rise buildings.

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.