Double flap check valve

Abstract

The invention relates to a double flap check valve. The double flap check valve comprises a valve body, valve flaps and an elastic piece, wherein a flow channel is arranged in the valve body, the flowchannel has an inlet end and an outlet end, and the middle part of the flow channel is provided with a partition which divides the flow channel into two parts; the two valve flaps are both hinged tothe portions, located at the two ends of the partition, of the valve body or to the partition, and the two valve flaps correspondingly seal the two parts of the flow channel under the action of the elastic piece so as to form a cut-off for the flow channel; the portion, located in the flow channel, of the valve body is independently provided with a valve seat, wherein the valve seat is provided with a through hole which communicates with the flow channel so as to form a local flow channel, and the partition is located on the valve seat so as to divide the through hole into two parts; and the valve flaps are in sealing fit with the valve seat under the action of the elastic piece to form a cut-off for the through hole. Through adopting the above scheme, the double-flap check valve can improve the sealing performance.

Description

technical field [0001] The invention relates to the field of valves, in particular to a double-disc check valve. Background technique [0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, adjust and control the parameters (temperature, pressure and flow) of the conveying medium. According to its function, it can be divided into shut-off valve, check valve, regulating valve and so on. [0003] Among them, the double disc check valve is a kind of valve, which includes a valve body, a valve disc and elastic parts. There is a flow channel in the valve body. The flow channel has an inlet end and an outlet end. For the partition of the two parts, the number of discs is two and they are all hinged at the partition. The two discs seal the two parts of the flow channel under the action of the elastic member to form a cut-off of the flow channel. When the fluid flows from the inlet of the flow channel When the end enters, the valve disc i...

AI Technical Summary

Problems solved by technology

[0004] The double-disc check valve with the above structure has certain disadvantages, that is, the sealing position between the valve body and the valve disc needs to be processed together with the valve body, and when the grinding equipment is inserted into the valve body, due to the limited area of ​​the inlet end of the valve body, it is difficult to grind. The hindrance brought by processing leads to the occurrence of uneven grinding, which in turn makes the roughness and flatness of the sealing position limited, affecting the sealing performance of the disc

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