Self-washing centrifugal screen filter

Abstract

The invention discloses a self-washing centrifugal screen filter. The self-washing centrifugal screen filter comprises a rotational flow drum, a separation drum and a sand collector, wherein a water collecting cap is arranged at the upper part of the rotational flow drum, an air inlet and exhaust valve is arranged at a central position of the upper end of the water collecting cap, and a water outlet pipe is radially arranged at a lower-middle part position of the side wall of the water collecting cap; a water inlet pipe is arranged on the side wall of the rotational flow drum along the tangential direction of the side wall, a filter screen is arranged inside the rotational flow drum, and the filter screen is composed of a bottom round screen piece, a cylindrical screen piece at the upper part of the round screen piece and a circular ring screen piece at the upper part of the cylindrical screen piece; and the edge of the circular ring screen piece is clamped in a filter screen annular mounting groove of a flange between the water collecting cap and the rotational flow drum. The self-washing centrifugal screen filter is simple and compact in structure and stable in properties, adopts double filtration, namely centrifugal filtration and filter screen filtration, has functions of a self-washing filter screen, does not need to frequently clean and replace a filter screen and is small in water resistance and good in filtering effect, and a water dropper or nozzle can not be blocked.

Description

technical field [0001] The invention relates to a filter, in particular to a self-flushing centrifugal screen filter. Background technique [0002] As a relatively mature water-saving irrigation technology, drip irrigation, micro-spray and sprinkler irrigation have been widely used in agricultural irrigation all over the world. In order to prevent the sediment in the water source from clogging the dripper or sprinkler, it is necessary to install a filter at the inlet of the irrigation main pipeline. . [0003] In the prior art, the filters used for drip irrigation, micro-spray and sprinkler irrigation main pipelines mainly include centrifugal filters, mesh filters and centrifugal mesh filters. The centrifugal filter includes a cyclone cylinder, a separation cylinder and a grit chamber. It relies on centrifugal force to settle large particles of sand into the grit chamber to achieve filtration. Its advantage is that there is no water resistance, and its disadvantage is that ...

AI Technical Summary

Problems solved by technology

The centrifugal filter includes a cyclone cylinder, a separation cylinder and a grit chamber. It relies on centrifugal force to settle large particles of sand into the grit chamber to achieve filtration. Its advantage is that there is no water resistance, and its disadvantage is that the filtration effect is not good. Well, fine sand particles will also enter the irrigation main pipe, which can easily cause drippers or nozzles to clog

The screen filter includes a filter screen of more than 100 meshes. Its advantage is that no particles that block the dripper or nozzle will enter the main irrigation pipe. The disadvantage is that there is water resistance, and the filter screen needs to be cleaned or replaced regularly.

The centrifugal screen filter includes a cyclone cylinder, a separation cylinder, a filter screen and a grit settling tank. It has the functions and advantages of a centrifugal filter and a screen filter, but also has some disadvantages, such as: complex structure, including centrifugal The filter part and the mesh filter part have large water resistance and need to be cleaned or replaced regularly. The centrifugal part has insufficient swirl angle and speed, and the centrifugal separation and filtration effect is not good.

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