Reversing valve

Abstract

The invention discloses a reversing valve. The valve comprises a valve body, and a valve rod, the valve rod is mounted in the valve body, an upper cavity and a lower air chamber used for collecting air are divided from the interior of the valve body, an air bag is mounted in the upper cavity, a first upper air nozzle communicating with the air bag is mounted in the valve body, a first lower air nozzle and a second lower air nozzle which communicate with the lower air chamber are formed in the valve body, a seal plug is connected to the lower portion of the valve rod and moves synchronous withthe valve rod, the air bag and the lower air chamber are mounted in the reversing valve, through vertical moving of the valve rod, the sizes of the air bag and the lower air chamber can be regulated,the seal plug can be controlled to open or close the first lower air nozzle, the gas pressure is used as a power source for control, the advantages of being simple in structure, small in weight and low in manufacturing cost can be achieved, function parts in abut joint with a first upper air nozzle, the first lower air nozzle and the second lower air nozzle are adjusted, the reversing valve can beapplied into different control valve bodies, and the function is strong.

Description

technical field [0001] The invention relates to a reversing valve, in particular to an air-controlled reversing valve, which belongs to the field of pneumatic operation of bathroom products. Background technique [0002] The reversing valve is used in the waterway control system in the field of plumbing and sanitary ware to control the on-off and reversing of the waterway. Most reversing valves control the switching action through electromagnetic structures, that is, electromagnetic reversing valves, which use a large number of electromagnetic components and have a complex structure. Although they have strong performance, for example, they can control different waterways at the same time, but they are expensive and prone to failure. In the field of plumbing The requirements for waterproof performance are also high. (The main solenoid valve needs electricity, or the battery needs to be replaced regularly, or the use of alternating current brings safety hazards, which is not ...

AI Technical Summary

Problems solved by technology

Most reversing valves control the switching action through electromagnetic structures, that is, electromagnetic reversing valves, which use a large number of electromagnetic components and have a complex structure. Although they have strong performance, for example, they can control different waterways at the same time, but they are expensive and prone to failure. In the field of plumbing The use has high requirements for waterproof performance

(The main solenoid valve needs electricity, or the battery needs to be replaced regularly, or the use of alternating current brings safety hazards, which is not energy-saving and environmentally friendly.) There are also some reversing valves with a mechanical spool structure, which opens and cuts off the waterway through the rotation or movement of the spool. , although this structure is not as complicated as a solenoid valve, its performance is also weak, and it can only control the on-off of a single waterway (there is no way to achieve flexible connection), and there is still room for improvement in the structure, and there are no problems of heavy weight and high cost. get an effective solution

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