Filter with automatic counter-flushing device

Abstract

The invention discloses a filter with an automatic counter-flushing device. The filter comprises a tank body, wherein the tank body is communicated with a water inlet pipe, a water outlet pipe and a blowdown pipe; a filter screen is fixed between symmetric slide bars; a contact pressure bar is fixed on one side, away from the water inlet pipe, of the slide bar; one end, close to the contact pressure bar, of the slide bar is fixedly connected with a compression spring; a concave operation block is fixed on one side, close to the contact pressure bar, of a guide rail; a power switch is arranged in a groove of the concave operation block; the power switch is electrically connected with an electric valve; a water storage plate is fixed on a connecting shaft; one side, away from the connecting shaft, of the water storage plate is communicated with a plurality of water spray pipes. According to the filter with an automatic counter-flushing device disclosed by the invention, when the filter screen is blocked, counter-flushing operation is performed automatically, and the blowdown pipe is automatically opened to discharge impurities, without needing manual control; since the water for counter-flushing is clean water, secondary pollution is effectively prevented; moreover, the filter is convenient to use and thus is very worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to a filter with an automatic backwashing device. Background technique [0002] In the prior art, a backwash pre-filter with the application number "201810909440.7" includes an installation body, and a first cavity is opened inside the installation body, and the inner top wall of the first cavity is fixedly communicated with There is a water inlet pipe, the inner top wall of the first cavity is fixedly connected with a water outlet pipe, and the water outlet pipe is located on the right side of the water inlet pipe, and the end of the water outlet pipe close to the installation body is fixedly connected with a water outlet valve. The inner wall of the cavity is fixedly connected with a silt discharge pipe. The backwash pre-filter is provided with a water outlet valve, which can make the water in the outlet pipe easy to control, making the pre-filter more convenient to use. The use ...

AI Technical Summary

Problems solved by technology

[0003] However, there are still obvious defects in its use: 1. When the filter screen in the above-mentioned device needs to be backwashed, manual regulation is required, and it is necessary to manually close the water outlet valve, open the silt discharge valve and start the rotating motor A series of operations, such as low efficiency, is very inconvenient to use; 2. The above-mentioned device does not use filtered water in the backwash process, which is likely to cause secondary pollution

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