VACUUM DRAINAGE SYSTEM Russian patent published in 2017 - IPC E02B11/00 

FIELD: agriculture.

SUBSTANCE: invention relates to the reclamation and can be used to dry the soil, especially heavy in texture with automatic control of groundwater levels. In a water inlet well 5 in the V-shaped bottom tube 3 subvalvular chamber 7 with an inlet 10 with valve 11 is placed. The valve 11 closes the inlet opening 10 by swinging action of body 14 connected to the rod 15 by moving the swinging body 13 and connected to the tank 18 of water-filled float 17, placed in the housing 23 moving along guides 24. Valve 11 is hinged to the body 14 of the tilt lever. Vessel 18 from the bottom side 19 is situated on a spring. Water-filled container 18 has orifice 20. The rod 15 is provided with a small float-counterweight 16. The top of subvalvular chamber 7 is covered by grid 8. Spring 19 serves to maintain the float 17 with the holding capacity 18 and supports the valve 11 in the subvalvular chamber 7, while opening and closing the hole in the connecting pipe 10; also, it eliminates the valve's impact loads on the pipe end 10. The opening of the hole in the pipe 10 in the subvalvular chamber 7 takes place only after the emptyfying of waterfilled capacity 18 the float 17 from the water through the calibrated hole 20 into the well 5. As a result, the operation of the float driving in the form of lever system, which is connected with the swing arms on the axes, balanced by the moments from the elastic force of the spring 19 itself and, respectively, fastening small counterweight float 16 on the rod 15; the valve 11 is mounted inside the subvalvular chamber 7 with the junction ability in the open position to the limiter 9. As a result an automatic mode of operation V-shaped pipe 3, and generally control of the level of on-diversion of excess water during the growing season, the corresponding groundwater levels rise, the maximum to the minimum mark.

EFFECT: invention improves the reliability of the device, and provides an automatic water discharge, and increases the accuracy of controlling the water level in the pit, equipped with a microporous material and the regulator.

1 dwg