Mechanical type intermediate case vacuum-pumping and pressurization apparatus and application method thereof

Abstract

The invention discloses a mechanical type intermediate case vacuum-pumping and pressurization apparatus and an application method thereof. One side of a roller in the apparatus is provided with a first hand-operated valve for opening a pollutant generator, the other side is provided with a second hand-operated valve for opening an intermediate case, the roller rotates around an axis, and a projection is arranged in the circumferential direction of the roller; the top portion of the intermediate case and the pollutant generator are connected, and the bottom of the intermediate case is connected with a pollutant case; and a piston rod in a cylinder is connected with the roller through a tensioning mechanism, and an accommodation chamber in the cylinder communicates with the intermediate case. The advantages are as follows: through rotation of the roller, the projection on the roller cooperates with the two hand-operated valves so that compressed air can conveniently penetrate into a pollutant generation source or the intermediate case and positive pressure is generated; the piston rod is driven to move through the rotation of the roller, so that negative pressure is generated in the intermediate case to enable pollutants to go into the intermediate case conveniently, or the positive pressure is generated to enable the pollutants to go into the pollutant case conveniently; and the whole apparatus is simple in structure, high in reliability and low in cost, and saves energy.

Description

technical field [0001] The invention relates to a mechanical middle box vacuuming and pressurizing device and a using method thereof. Background technique [0002] The middle box is often used in the CRH3C, CRH5 and other EMU toilets. The principle is to collect the dirt through the middle box into a normal-pressure dirt box. When flushing, the middle box first generates negative pressure, the water booster flushes the bedpan, the inlet valve of the middle box is opened, and the dirt in the bedpan is sucked in; then the inlet valve is closed, and the middle box generates positive pressure again, which communicates with the dirt box under the vehicle The outlet valve opens to push the dirt to the dirt tank, so that the dirt can be collected. The existing intermediate box of the toilet collection pan of the EMU relies on the ejector to generate negative pressure, and directly passes compressed air to generate positive pressure, which will inevitably consume a large amount of ...

AI Technical Summary

Problems solved by technology

The existing middle box of the toilet collection pan of the EMU relies on the injector to generate negative pressure, and directly injects compressed air to generate positive pressure, which will inevitably consume a large amount of compressed air, and the generation of compressed air requires power. From this From a point of view, the existing devices waste a lot of compressed air and the kinetic energy of compressed air, which is very unfavorable for energy saving

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