DUAL SCREEN SYSTEM FOR CONNECTION WITH SCREENING MACHINE (VERSIONS) Russian patent published in 2018 - IPC B07B1/46 

FIELD: separation or sorting of solid materials.

SUBSTANCE: disclosed group of inventions is intended for the separation of washing liquid and drill cuttings. According to the first embodiment, a dual screen system for connection with a vibrating screen comprises an upper sieve assembly having a non-rigid connection with a lower sieve assembly with the formation of a channel between the upper sieve and lower sieve assemblies. Each screen assembly has a frame and screen mesh attached to the frame. Upper sieve assembly has an equivalent mesh or mesh with a larger mesh size than the lower sieve. Frame of the lower sieve assembly is held under the frame of the upper sieve assembly by directly joining the upper sieve assembly to the frame. Connecting system is adapted for non-rigid connection of at least the frame of the upper sieve assembly directly with a vibrating screen. In the second embodiment, a dual screen system for connecting with a screen, forming a support for at least two stepped sieves in the form of corresponding support arms in the screen cassette comprises a bottom screen support having dimensions suitable for insertion between the support arms and below them, an upper screen support, loosely connected to the support for the lower screen, with the support for the upper screen having dimensions suitable for insertion above the support arms. Support of the lower screen serves as a support for the first lower screen. Support of the upper screen serves as a support for the first upper screen. Bottom screen support and the upper screen support form a pair of dual screen supports. Dual screen system includes a pair of dual screen supports for each stage of the vibrating screen.

EFFECT: technical result is higher efficiency of separation.

37 cl, 22 dwg