| 摘要 |
FIELD: agricultural engineering, in particular, equipment for irrigation of farm crops by drop irrigation process. ^ SUBSTANCE: apparatus has cylindrical carcass with inlet and outlet apertures. Valve and elastic collar are located within carcass cavity. Cylindrical carcass is divided by partition wall into pressure cavity and pressure-free cavity. Said cavities are hydraulically communicated through bypass aperture. Spiral grooves having rectangular section and provided on upper and lower surfaces of partition wall are joined with bypass aperture. Pressure-free cavity closed from below by threaded closure is filled with elastic gas-expanded plastic of polyurethane. In pressure cavity of carcass between valve and elastic collar there is water flow splitter formed as plate. Plate faces with its smaller base said valve and is equipped with opening. Diameter of said opening is smaller than diameter of valve sphere. Peripheral planar part of plate is joined with elastic collar which is manufactured from elastic gas-expanded plastic based on polyurethane. Elastic collar is located above spiral groove provided in partition wall. ^ EFFECT: increased efficiency owing to uniform and continuous dispensing of norm in drop irrigation of farm crops. ^ 4 cl, 3 dwg |
