39results about How to "Adjust air intake" patented technology

The invention discloses an air intake valve of an energy-saving mine variable frequency compressor, which relates to the technical field of valves. Aiming at the problem that the existing air intake valve cannot well cooperate with the operation of the compressor, the following scheme is proposed, which includes a valve The two sides of the valve body are fixedly welded with symmetrically arranged connecting pipes, the connecting pipe flanges are connected with communicating pipes, the valve body is fixedly welded with a fixed seat, and both sides of the fixed seat are fixedly welded with A guide plate, a ventilation groove is arranged in the middle of the fixed seat and the guide plate, a first spring is fixedly connected to one side of the guide plate, and a moving plate is fixedly connected to the end of the first spring away from the guide plate, and the moving plate One end away from the first spring is slidably connected with the groove wall of the ventilation groove. The invention is simple in structure and convenient in use, and can meet the needs of production. The mechanical connection of threads makes the device more stable, easy to realize, and can be well adapted to the frequency conversion compressor.

The invention discloses a fastener longitudinal resistance measuring device. The fastener longitudinal resistance measuring device includes a fastener seat 4, a turning table 5, a rack 7, a first air cylinder 6, a second air cylinder 8 and wheels 9; the second air cylinder 8 makes the turning table 5 stand upright, and a steel rail 3 and a fastener are mounted on the fastener seat 4; the first air cylinder 6 pushes the fastener seat 4 out to a test platform 2; a pressing head 1 provided with a displacement and force sensor applies a force onto the steel rail 3; and the longitudinal resistance of the fastener is tested according to procedures. The fastener longitudinal resistance measuring device of the invention is applicable to a plurality of kinds of fasteners and has high universality; a universal electronic testing machine in a laboratory can be adopted as the pressing head 1 provided with the displacement and force sensor, and therefore, part purchase cost can be reduced, and the multi-purpose performance of the fastener longitudinal resistance measuring device can be achieved; pneumatic control is adopted, so that labor force consumption can be decreased; the extending and stretching speed of the air cylinders can be controlled through adjusting air inflow, and therefore, injuries to operators can be avoided; and the fastener longitudinal resistance measuring device is convenient to move, and the fastener longitudinal resistance measuring device can be moved away with easiness when the fastener longitudinal resistance measuring device is not used. The fastener longitudinal resistance measuring device has the advantages of compactness, lightweight, structural simplicity and easiness in maintenance.

The invention discloses a sintering machine trolley first-grade water sealing heat transpiration protection shield device which comprises supports, U-shaped water sealing grooves and a shield. The supports are installed on trolley foundations on the two sides of a trolley. The U-shaped water sealing grooves are connected with the upper ends of the supports through bolts. The lower ends of the shield walk into the U-shaped water sealing grooves through walking wheels. The whole shield covers the space of the upper end of a sintering trolley, and the top of the shield is higher than side baffles of the trolley. The two side walls of the shield are provided with adjusting windows adjusting the air flow, and the adjusting windows are used as cold air suction inlets. The sintering machine trolley first-grade water sealing heat transpiration protection shield device further comprises sealing steel plates. The sealing steel plates are sealed between trolley guide rails and the trolley foundations and sealed between the trolley guide rails and trolley bottom sealing strip guide rails. The sintering machine trolley first-grade water sealing heat transpiration protection shield device can improve the sintered ore combustion rate, and meanwhile lower energy consumption, sintered material heat losses are avoided, and it is ensured that cold air exchanges from top to bottom.

The invention discloses a control method and system for natural gas engine EGR knocking correction. The system comprises an acceleration sensor arranged on a engine body, wherein the acceleration sensor collects the vibration of the engine body, converts the vibration of the engine body into a corresponding electric signal and transmits the corresponding electric signal to an electric control unit, the electric control unit compares the electric signal corresponding to the vibration of the engine body with a preset vibration signal, and judges whether knocking occurs or not according to the comparison result; and if knocking occurs, the spark advance angle is corrected, and the EGR valve opening degree and / or the throttle valve opening degree are / is corrected so that knocking is quickly controlled. When knocking occurs, the output power of an engine is calculated, whether the output power exceeds the required power or not is judged, and if yes, the throttle valve opening degree is corrected, so that the intake gas amount is adjusted and driving safety is ensured. Therefore, the control method and system for natural gas engine EGR knocking correction can quickly control knocking, prevent re-occurrence of knocking and ensure driving safety.

The invention discloses a haze-preventing riding mask, which comprises a mask body. Wearing holes are formed in the mask body in a front-back symmetrical mode; a cover plate is moved upwards, a clamping block slides out from a clamping groove, and a sliding block and a moving block slide in a sliding cavity and a moving cavity correspondingly; and the cover plate is rotated and then can be opened, and a filter element is replaced. A filtering mechanism has a haze-preventing function, the filter element filters haze, and thus body health of pedestrians is ensured; and the cover plate can be opened, the filter element is replaced, the resource is saved, a rotary knob in an air inlet mechanism is rotated, and the size of an air inlet opening can be adjusted to adjust the air inflow.