4results about How to "Effective rectification" patented technology

This invention relates to the field of petroleum proppant production equipment technology, specifically disclosing a petroleum proppant preheating device with a spreading structure, including a spreading box and a preheating pipe. The spreading box is installed on one side of the preheating pipe and is connected to it. The spreading box has a material distribution structure and a material guiding structure inside. The material distribution structure includes an inclined outer cylinder and an inner cylinder. The inner cylinder is divided into multiple screening chambers by an annular partition. Each screening chamber is equipped with a grading screen plate with a different aperture at the bottom. The inner cylinder is equipped with a material agitator to move the material blanks. The material guiding structure is equipped with multiple sets of material guiding components. The material guiding components are equipped with stepped material guiding plates. A spreading wheel is set at the discharge end of the material guiding components. Two gas equalization plates with different apertures are fixed inside the preheating pipe. This invention separates material blanks of different particle sizes through the grading screen plates, sets different lengths of preheating paths through the material guiding components, and spreads the material blanks in layers through the spreading wheel. The gas equalization plates regulate the hot flue gas, so that all kinds of material blanks are heated evenly, reducing the bursting and pulverization of the material blanks during calcination and maintaining the roundness of the particles.

This utility model relates to the field of rectifier and filter circuits, and more particularly to an AC input rectifier and filter circuit, including a rectifier bridge, a transformer, an anti-interference module, and an overvoltage protection module. A second safety Y capacitor CY2 and a third safety Y capacitor CY3 are connected in series. The third safety Y capacitor CY3 is connected to the N terminal of the mains power supply, and the second safety Y capacitor CY2 is connected to the L terminal of the mains power supply. The overvoltage protection module includes a varistor MOV1. The positive input terminal of a common-mode inductor L1 is connected to the L terminal of the mains power supply. The positive and negative output terminals of the common-mode inductor L1 are connected to the input terminals of the rectifier bridge, respectively. The positive output terminal of the rectifier bridge is connected to the positive terminal of a storage capacitor C3, and the negative output terminal of the rectifier bridge is connected to the negative terminal of the storage capacitor C3. The positive terminal of the storage capacitor C3 is connected to the transformer, and the transformer outputs 12V. This circuit enhances the anti-interference capability of the circuit by optimizing the design of the rectifier and filter circuit; at the same time, the introduction of overvoltage protection components such as a varistor improves the overvoltage protection capability of the circuit.

The utility model relates to a multifunctional compressor air suction and exhaust cavity structure which comprises a compressor rear cover, and the compressor rear cover comprises an air suction cavity and an exhaust cavity structure. The air suction cavity is formed in the center of the compressor rear cover; the utility model relates to the technical field of compressors. According to the suction and exhaust chamber structure of the multifunctional compressor, the position of the exhaust port can be flexibly arranged, exhaust pulsation is effectively rectified, noise is reduced, the operation efficiency of the compressor and user experience are improved, the suction chamber is located in the middle, the temperature of the exhaust chamber can be reduced, and the durability of the compressor is improved; the exhaust chamber is arranged on the outer ring, the heat dissipation effect is enhanced, the exhaust port can be arranged at 360 degrees, and the flexibility of product design is greatly improved.

The utility model provides an automatic mounting mechanism for a printed circuit board, which comprises a suction nozzle and a filter screen arranged in the suction nozzle, and a cleaning mechanism for removing impurities at the bottom of the filter screen is arranged in the suction nozzle. The cleaning mechanism comprises a rotating shaft rotationally connected to the filter screen, a cleaning brush arranged at the bottom end of the rotating shaft and a driving structure arranged in the suction nozzle and used for driving the rotating shaft to rotate, and an air blowing mechanism is arranged above the filter screen. Through the cooperation of the cleaning mechanism and the blowing mechanism, residual dust on the filter screen can be cleaned by utilizing the cleaning mechanism, and meanwhile, the blowing mechanism can blow air to the filter screen, so that cleaned impurities can be blown to be separated from the filter screen, pores of the filter screen can be deeply cleaned, and residual small particles in the pores can be blown out; and the cleaning effect on the filter screen is further improved, so that the cleaning work on the filter screen becomes efficient and rapid, and the working efficiency of automatic mounting of the printed circuit board is ensured.