One-way valve with built-in decompression function

Abstract

The invention discloses a one-way valve with a built-in decompression function. The one-way valve comprises a valve body; the valve body is internally provided with a fluid channel in the axial direction; annular sealing faces and spring seats are fixed in the fluid channel at intervals; a first valve element assembly is arranged between the annular sealing faces and the spring seats in the fluidchannel; the first valve element assembly comprises first valve elements and first springs; the first valve elements contact with the annular sealing faces under the action of the first springs in a sealing mode; decompression holes are formed on the first valve elements in the axial direction in a penetrating mode; the valve body is also internally provided with a second valve element assembliesused for plugging the decompression holes; the second valve element assembly comprises a second valve element and second springs; the second valve element seals the decompression holes under the action of the second springs; and the opening direction of the second valve element is opposite to that of the first valve elements. The one-way valve with the built-in decompression function is suitable to be installed at a water inlet of a water heater tank; when the water heater water tank supplies water normally, the one-way valve can guide a pipeline; and when the pressure of the water heater tankis too high, and the one-way valve can reflow pressure.

Description

technical field [0001] The invention relates to a one-way valve with a built-in pressure relief function, belonging to the field of one-way valve structure design. Background technique [0002] Patent document CN101956846B discloses a shut-off valve, including: valve body, retainer, valve core, spring, spring seat and locking plate, the valve body is a hollow cylinder, both ends of the valve body are processed with internal threads, and the retainer It is a bowl-shaped ring, the baffle is connected to the left end of the valve body through threads, the valve core is pressed against the hole of the baffle by a spring, one end of the spring is on the spool, and the other end of the spring is on the spring seat. The spring seat is a disc with external thread, and there are holes evenly distributed on the disc. The spring seat is connected to the right end inside the valve body through threads, and the locking plate is a ring with external threads. On the other side, the positi...

AI Technical Summary

Problems solved by technology

The cut-off valve disclosed in this patent document has the function of overflow and pressure relief, that is, when the system pressure is too high, the excess pressure can be released through the pressure overflow device, so as to avoid local bursting of the system and improve the safety of the system. The valve disclosed in the patent literature is essentially a pressure relief valve, which can only be used for one-way pressure relief, and is not suitable for two-way pressure-bearing environments, and its scope of application is limited

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