Four-way valve nozzle cap structure

The utility model discloses a four-way valve pipe-connecting pipe cap structure which is composed of a connecting pipe, a pipe cap encased onto the extremity of the connecting pipe, a drier layer, a seal cap and a plurality of O-shaped seal rings. The seal cap is arranged in the pipe cap with which the seal cap forms a close room that is arranged with a drier layer. A small air outlet or a plurality of small air outlets are arranged on the seal cap. The O-shaped seal ring is positioned between the connecting pipe and the seal cap, and is tightly jointed with the connecting pipe and the seal cap. The utility model improves the existing simple airproof pipe cap structure to be the complex airproof pipe cap structure. The airproof performance of the O-shaped seal ring can effectively prevent the humid air and moisture from entering into the pipe body. Even the humid air or moisture entered into the valve body can be absorbed via the small air inlets by the drier layer. The pipe-connecting pipe cap structure has the function of the seal dryness, thereby making the bowel of the valve body always kept a state of the dryness, avoiding the rustiness of internal components, guaranteeing the normal usage of the 4-way valve, and prolonging the service life of the 4-way valve.