a filter tank

Abstract

The invention relates to a filtering tank, and in particular relates to an air-water back-flushing filtering tank for filtering tap water. The filtering tank is characterized in that V-shaped grooves are formed in two sides of the filtering tank; a drainage channel is positioned in the middle of the filtering tank; a filtering layer is arranged between the drainage channel and the V-shaped grooves; an airbag valve facing the middle of the drainage channel is mounted at a part in which a filtering grid is connected with a head water inlet channel; fine-adjusting water inlets are formed in two sides of the airbag valve; the airbag valve comprises three parts, namely, a valve seat, a valve body and a protecting baffle plate; the valve body and the valve seat are in a form of drawer type combination. According to the back-flushing filtering tank, a back-flushing device is reasonable in design and layout, the novel airbag valve is provided, and therefore, the filtering tank which is low in maintenance cost, long in service life, has a good back-flushing effect, meets the requirements of national standard on tap water quality, and realizes automatic control is provided; the valve body and the valve seat of the airbag valve is designed in the form of the drawer type combination, so that the convenience is brought to dismount and mount; the unified design brings high interchangeability, high water level is allowed during interchanging, and thus waste caused by draining can be reduced; the size of the airbag valve can be designed according to the dimension of the original water inlet of the filtering tank, so that the problem of civil modification is solved.

Description

technical field [0001] The invention relates to a filter tank, in particular to an air-water backwash filter tank for filtering tap water. Background technique [0002] The backwashing effect of the traditional filter is mediocre, the connection of the backwashing device is complicated, the maintenance cost is high and the utilization rate is low; because the airbag valve is used to control the water inflow of the filter for a long time, the two rubber plates are easy to crack and leak due to long-term immersion in water, and the high Intense working environment leads to high cost and short service life of traditional airbag valves. In addition, due to the unreasonable original design and poor consideration of the convenience of maintenance, disassembly and assembly are time-consuming and laborious, and the workload of machine repair is heavy. When the air bag valve is replaced and repaired, the filter must be shut down and the water in the inlet canal must be drained. Cost ...

AI Technical Summary

Problems solved by technology

[0002] The backwashing effect of the traditional filter is mediocre, the connection of the backwashing device is complicated, the maintenance cost is high, and the utilization rate is low; because the airbag valve is used to control the water inflow of the filter for a long time, the two rubber sheets are easy to crack and leak due to long-term immersion in water, and the high Intensive working environment leads to high cost and short life of traditional airbag valves

In addition, due to the unreasonable original design and poor consideration of the convenience of maintenance, disassembly and assembly are time-consuming and laborious, and the workload of machine repair is heavy. When the air bag valve is replaced and repaired, the filter must be shut down and the water in the inlet channel must be drained. very expensive

If the airbag valve is transformed into an electric valve, it will cost a lot, including the purchase of electric valves, wiring, civil engineering transformation, and installation. The cycle is long, the investment is large, and the operation and maintenance workload is large, and the versatility is not high.

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