An automatic pressure reducing valve

Abstract

The invention discloses an automatic reducing valve which comprises a rear casing, a front casing and a tapered piston. The front casing is fixedly connected with the rear casing through a thread, the tapered piston is movably connected with the rear casing, a gas releasing hole is arranged at the end of the rear casing, a spring is arranged in the front casing, one end of the spring is placed in a hollow cavity which is matched with the spring in appearance in the front casing, the other end of the spring is sleeved on an end cylinder on the tapered piston, a locking gasket is fixedly installed between the rear casing and the front casing through a locking groove, a vent groove is arranged on the locking gasket, and gases are discharged through the vent groove on the locking gasket. Accordingly, parts are tightly connected and are free from loosening during assembling, enough gas pressure can be produced during gas inflation, the vent groove can control air leak current during gas discharging, and the automatic reducing valve is high in accuracy and ideal in effects of gas inflation and discharging.

Description

technical field [0001] The invention relates to a pressure reducing valve, in particular to an automatic pressure reducing valve. Background technique [0002] The automatic pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure through adjustment, and relies on the ability of the medium itself to keep the outlet pressure automatically stable. At present, the common automatic pressure reducing valve is mainly composed of the rear shell, the front shell, the conical piston and the spring. The exhaust gas is mainly discharged through the gap between the end plate of the rear shell and the front shell. If the housings are locked too tightly, air cannot escape through the gaps between the parts, but if the housings are locked too loosely, air will leak and the compressor will not be able to create enough pressure. At present, there are no ribs and O-ring seals in the front housing of the common automatic pressure reducing valve....

AI Technical Summary

Problems solved by technology

At present, the common automatic pressure reducing valve is mainly composed of the rear shell, the front shell, the conical piston and the spring. The exhaust gas is mainly discharged through the gap between the end plate of the rear shell and the front shell. If the housings are locked too tightly, the air cannot escape through the gaps between the parts, but if the housings are locked too loosely, the air will leak and the compressor will not be able to create enough pressure

At present, there are no ribs and O-rings in the front housing of the common automatic pressure reducing valve. When inflating, the contact area between the conical piston and the inner wall of the front housing is too large, which will cause the conical piston to be stuck when inflating.

[0003] At present, the material of the front and rear shells of the common automatic pressure reducing valve is nylon, and the material of the tapered piston is rubber. It is easy to loosen during the assembly process and cannot achieve sufficient accuracy.

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