Automatic backwash filter

Abstract

The invention relates to an automatic backwash filter and belongs to equipment for chemical industry. The automatic backwash filter comprises a shell, a filter screen, a liquid inlet, a liquid outlet and a draining outlet, wherein a valve rod sealing device is mounted at the center of the upper surface of the shell; the liquid inlet is connected with a lower cylinder; the liquid outlet is connected with an upper cylinder; a lower central valve hole is arranged on a lower end face of the upper cylinder; central valve holes are arranged on the upper and lower end faces of the lower cylinder; the draining outlet, the lower cylinder and the upper cylinder are all coaxial with the valve rod sealing device; an operation mechanism is mounted in the valve rod sealing device; the operation mechanism comprises a valve rod, an operation handle and a cylinder; a central valve hole is also arranged on the lower surface of the cylinder and a floating spindle is mounted in the central valve hole; a limiting sheet is fixed at the top end of the floating spindle; a lower valve clack is fixed at the lower end of the floating spindle; an upper valve clack and a middle valve clack are fixed at the middle part of the floating spindle; and the edge of the upper valve clack is connected with the filter screen. The automatic backwash filter can perform backwashing automatically without the help of manual operation; the equipment cost is low; the filter screen can keep clean and complete for a long term without specially stopping the work and production and disassembling the filter regularly; and the automatic backwash filter can be widely applied to chemical industry and a water supply and drainage system.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and water supply and drainage equipment, and more specifically relates to the design innovation of an automatic backwash filter. Background technique [0002] The filter on the traditional liquid pipeline cannot be backwashed automatically, but can only be backwashed manually. There are two methods of manual backwashing: one is to prevent debris from clogging the filter screen, the filter needs to be disassembled regularly for manual cleaning, and then assembled after cleaning. This method is very cumbersome and requires a shutdown of work and production. The other is to add 3 valves to the filter system. When the filter screen is blocked by sundries, in order to complete the backwash, it is necessary to manually operate the opening and closing of the 3 valves according to a certain procedure. reset. Not only greatly increased equipment cost, but also very troublesome to operate. Co...

AI Technical Summary

Problems solved by technology

Not only greatly increased the equipment cost, but also very troublesome to operate

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