VACUUM DRAINAGE SYSTEM Russian patent published in 2016 - IPC E02B11/00 

FIELD: agriculture.

SUBSTANCE: invention relates to reclamation and can be used for drying soil especially heavy soil on mechanical composition with automatic control of ground water level. In intake well 5 in base of V-shaped pipe 3 there is under-valve chamber 7 with additional inlet pipe 8 with valve 9. Valve 9 closes hole of inlet connection pipe 8 by pressing float 10 with open water-filled vessel 11, placed in housing 12, moving along guides 13. Valve 9 is rigidly attached to rod 15. In middle part of rod 15 there is membrane 16 fixed in housing 17. To upper part of housing 17 in form of cover there is rigidly attached bottom of housing 12, in which there is float 10 with vessel 11 arranged on spring 18. Upper part of rod 15 via washer 20 is connected with bottom of float 10 with vessel 11. Water filled vessel 11 has calibrated hole 14. In lower part of rod 15 there is guide sleeve 21. Under-valve chamber 7 from above is covered by mesh 22. Spring 18 serves to maintain float 10 with vessel 11 at closing or opening valve 9 in under-valve chamber 7, and is also a sensitive element for displacement of float 10 with vessel 11 and eliminates impact load between housing 17 and float 10 with vessel 11, as well as valve 9 on end of pipe 8. Opening of holes in pipe 8 in under-valve chamber 7 takes place only after releasing water-filled vessel 11 of float 10 from water via calibrated hole 14 in well 5. As a result automatic operating mode of V-shaped pipe 3 is provided and in whole control level in mode of removal of excess water during vegetation period, corresponding to lifting of level of ground water from maximum to minimum level.

EFFECT: higher reliability of device, higher accuracy of control and wider range of equipment intended to control water level in well equipped with a microporous material and controller.

1 cl, 1 dwg