5results about How to "Less cost increase" patented technology

The utility model relates to a kind of plate type support height adjustment device, including intermediate steel plate and lower pelvic cavity, the upper support plate type support of intermediate steel plate, the lower pelvic cavity has the recess matched with the intermediate steel plate, the intermediate steel plate is placed in the recess of the lower pelvic cavity, the lower pelvic cavity is provided with filling channel, one side of the filling channel is the import exposed to the outer surface of the lower pelvic cavity, the other side is the outlet extended into the recess;By filling medium in the recess is filled to filling channel, with the increase of filling medium, the intermediate steel plate is jacked up, and the height of the plate type support is adjusted.The utility model has the advantages that:it is suitable for various plate type rubber supports, including circular, rectangular, fixed support, movable support;Plate type support height adjustment function can be realized, stress condition of support is guaranteed by height adjustment, and voiding phenomenon is avoided;Simple structure, relatively small cost increase;Convenient to use, reusable, suitable for promotion.

The application discloses a food packaging bag raw material conveying structure and relates to the field of food packaging bags, which comprises a conveying cavity, one end of the conveying cavity is provided with an inspection plate, one end of the inspection plate is provided with an output device, the output end of the output device is in transmission connection with one end of an auger, the auger is rotationally connected to one end of the inspection plate, the top end of the conveying cavity is provided with an inlet, and a screening structure is arranged in the inlet. In the application, the plastic particles required to be transmitted to the food packaging bag production equipment can be screened according to requirements, and the plastic particles that do not meet the standards can be treated until the size meets the standards. In this way, the utilization rate of raw materials is improved, the cost increase caused by material waste is reduced, and the uniform particles are easier to control parameters in processing, so that the production process is more stable.

The application discloses a preparation method of high-purity-phase battery-grade trimanganese tetraoxide. Pure water is firstly added into a reaction kettle and stirring is started, then ammonium salt and an additive are added and oxidation gas is introduced, then manganese powder is continuously added into the reaction kettle, the pH of the reaction liquid is controlled to be 7-9 during the feeding process, and high-purity-phase battery-grade trimanganese tetraoxide is obtained after treatment. In the application, the manganese powder is continuously added and the pH is controlled to be 7-9 during the whole reaction process, and the two technologies are combined, so that the prepared trimanganese tetraoxide does not contain needle-shaped heterogeneous phases, and pure-phase trimanganese tetraoxide is obtained.

The invention discloses an AC power adjustable IGBT module test system and method, and belongs to the technical field of electronic device test. The system comprises a first IGBT half-bridge module, a second IGBT half-bridge module and an AC branch. The alternating current output end of the first IGBT half-bridge module and the alternating current output end of the second IGBT half-bridge module are connected through an alternating current branch. The alternating current branch comprises an adjustable resistor unit, the adjustable resistor unit comprises a fixed resistor and a pair of antiparallel thyristors connected with the fixed resistor in parallel, and gate poles of the two thyristors are connected with the output end of the controller. According to the system, the adjustable resistor unit intelligently controlled by the thyristors is connected in series in the alternating current branch, the adjustable resistor unit is formed by connecting the fixed resistor and the pair of antiparallel thyristors in parallel, and the IGBT half-bridge module is cooperatively controlled by controlling the conduction angle and the on-off state of the thyristors, so that the IGBT half-bridge module can be switched on and off. And the loop equivalent resistance of the alternating-current branch is changed steplessly and quickly, so that the continuous adjustment of the alternating-current power is realized.

The present application relates to input impedance boosting device, input impedance boosting device includes: analog-digital conversion circuit; input capacitor, with the input end of analog-digital conversion circuit and ground wire are connected, and the first shielding metal is formed in lower part;Feedback capacitor, with the positive feedback loop of analog-digital conversion circuit is connected, and the second shielding metal is formed in lower part;And impedance boosting unit, with the both ends of feedback capacitor are connected, and the first parasitic component formed between input capacitor and first shielding metal and the second parasitic component formed between feedback capacitor and second shielding metal are used to boost input impedance.