Liquid flushing type multi-channel switching channel valve assembly

Abstract

The invention discloses a liquid flushing type multi-channel switching channel valve assembly, which comprises a valve body. A water inlet cavity, a water outlet cavity and a water drain cavity are formed in the valve body; a flow guide part I for communicating the water inlet cavity with the water outlet cavity, a flow guide part II for communicating the water outlet cavity with the water drain cavity, and a valve core assembly for controlling the alternate switching on and switching off of the flow guide part I and the flow guide part II are arranged at the junction of the water inlet cavity, the water outlet cavity and the water drain cavity; an elastic cavity which is connected with the valve core assembly and a pressure control mechanism for regulating the internal pressure of the elastic cavity are also arranged on the valve body; and due to the regulation of the pressure control mechanism, the elastic cavity expands and contracts to drive the valve core assembly to slide between the flow guide part I and the flow guide part II in a reciprocating mode, so that the alternate switching on and switching off of the flow guide part I and the flow guide part II is realized. Channel switching is finished in a pressure regulation mode, but pressure change is realized by controlling an electromagnetic valve; and the liquid flushing type multi-channel switching channel valve assembly has the advantages of simple structure, convenient control, no investment in equipment such as an air source and the like, and low manufacturing cost.

Description

technical field [0001] The invention relates to a valve structure, in particular to a liquid flushing type multi-way switching channel valve. Background technique [0002] The switching valve is the core control component in the water treatment equipment. By switching the channels in the valve, different water flow channels are formed to achieve the required functions. For example, the existing water dispenser with reverse osmosis membrane as the core filter structure often needs to switch between the two states of filtration and backwashing to keep the reverse osmosis membrane filter in good working condition. At present, there are mainly the following methods for switching the channels in the switching valve: 1. Use multi-layer sealing rings and partition grids to form different sealing cavities, and control the cylindrical piston to move between multiple sealing cavities through a motor to form a Channels with different functions; 2. Multiple strip valves are arranged on...

AI Technical Summary

Problems solved by technology

The switching valves of the above three structures all require a large number of precision parts to be assembled together, the structure is complex, the processing and assembly of parts are high, and the cost of the switching valve is increased.

In recent years, large-scale valve assemblies use air pressure to control the switching of channels, and the control effect is better, but it is necessary to add air source equipment to provide air pressure, which increases the cost; moreover, electrical or pneumatic components are easily damaged, and the operation is more complicated

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