SAND AND GRAVEL TRAP Russian patent published in 2017 - IPC E02B8/02 E03F5/14 C02F1/52 B01D21/00 

FIELD: construction.

SUBSTANCE: sand and gravel trap comprise a main receiving container 1 and an additional damping container 2, installed in a settling container 3 of a larger volume with a pit 4. To the pit 4, a manifold 5 having a shutter 6 is connected. The bottom of the main 1, the additional 2 and the settling 3 containers has a slope towards the alluvium-wash pit 4 formed in the bottom 7. The sand and gravel trap comprise vertical partitions 8, 9 and 10. In the lower part of the partitions 9 and 10, L-shaped visors 11 and 12 are fixed, the flange of which is directed downwards. The partitions 8, 9 and 10 divide the sand gravel onto a main 1, an additional damping 2, an overflowing 13 and a settling 3 container. At the top of the additional damping container 2 arranged in the container 3, under the cover 14, a float 15 is arranged, anchored at one end of the lever 16, secured with its second end in the overflow container 13 with the rotation axis 17. A link 18 is arranged in guides 20, and with its upper end is hingedly connected to the lever 16 in its middle part, and is rigidly connected to the valve 19 with its lower end. In the lower part of the receiving container 1, there is an overflow pipe 22 connecting the settling container 3 with the overflow container 13. The end of the overflow pipe 22 lying in the settling container 3 is provided with a hose 23 with a diffuser 24 with a vertical tube 25 with a check valve 26. A float 27 is rigidly fastened to the diffuser 24. A debris-protecting device 28 provides protection against floating debris of the inlet opening of the diffuser 24. The end of the overflow pipe 22, located in the overflow container 13, is made in the form of a chamber 29, at the bottom of which there is an opening 30. To regulate the area of the opening 30, a valve 19 is provided, which is rigidly connected to the link 18. The vertical partitions 9 and 10 are fixed so that between their bottom edges with L-shaped visors 11 and 12, the flange of which is directed downward, and the bottom a slotted opening is formed for water passage from the receiving container 1 to the additional damping 2 and the settling 3 containers. The vertical partition 8 has an opening 31 located at the level of the upper position of the float 15 in the additional damping container 2 for water overflow from the container 2 into the overflow container 13. In the bottom part, the overflow container 13 communicates with a pipeline 32 for tapping clean water to the consumer. In such arrangement of the containers equipped with the vertical partitions with L-shaped visors, the flange of which is directed downwards, and making the bottom with a slope towards the pit 4, the alluvium will flow into the manifold 5 with the shutter 6, and clean water will be supplied from the upper layers of the additional damping container 2 and the settling container 3 into the overflow container 13 and further to the consumer.

EFFECT: ensuring operational efficiency, simplifying and reducing metal consumption, preventing the ingress of bottom and suspended alluvium of a fraction more than 0,2 mm into pipelines with pumping irrigation and fore chambers of pumping stations.

2 cl, 1 dwg