Preposed pressure-stabilizing backwashing filter

Abstract

The invention discloses a preposed pressure-stabilizing backwashing filter, and belongs to the technical field of central water distribution; the filter comprises a filter cavity, a filter membrane, athreaded port, a pressure relief hole, a sealing column and a shutoff valve, wherein the filter membrane for water purification is arranged in the middle of a shell, the filter cavity is arranged onthe outer side of the filter membrane, and the threaded port is arranged below the filter membrane; the pressure relief hole is formed in a thread of the threaded port, a sealing column used for sealing the filter membrane is arranged below the threaded port, the shutoff valve used for stabilizing pressure is arranged on the right side of the shell, a base is arranged below the filter membrane, the sealing column is fixedly mounted on the base, and a drainage hole is formed in the bottom of the base. According to the invention, the sealing column and the shutoff valve are arranged on a pre-filter, so that the water hammer effect generated when the filter is backwashed and cleaned can be effectively reduced, and water leakage and pipe explosion caused by damage of a water hammer to a connecting pipe are prevented.

Description

technical field [0001] The invention relates to the technical field of central water distribution, in particular to a pre-stabilized recoil filter. Background technique [0002] The central water distribution system is a water distribution device that connects indoor water and home appliances through water distribution pipelines to stabilize the flow and constant temperature. During the installation of the water distribution device, it is first necessary to pretreat the indoor water source to prevent Impurities and trace metal elements can block and corrode pipelines, which will affect the service life of water appliances. Therefore, a pre-filter will be installed at the water source for preliminary purification of the water source. [0003] At present, the pre-filters on the market have a backflushing function, that is, the interior of the filter is self-cleaned by water pressure to prevent impurities from accumulating in the filter membrane of the filter, but the process o...

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Problems solved by technology

[0003] At present, the pre-filters on the market have a backflushing function, that is, the interior of the filter is self-cleaned by water pressure to prevent impurities from accumulating in the filter membrane of the filter, but the process of backflushing involves water valves This will lead to the occurrence of the water hammer effect. The water hammer effect means that when the open valve is suddenly closed or the closed valve is suddenly opened, the water flow will generate shock waves under the action of inertia, destroying the valve and the water pump. When flushing, the water flow will damage the pipe connection and the water valve. After repeated use, it will cause water leakage and rupture at the connecting pipe. Some filters with poor materials will directly burst the pipe and collapse.

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