Double-clack check valve

Abstract

The invention provides a double-clack check valve, which comprises a valve body, valve clacks, a valve seat, a seal ring, torsion springs, a valve shaft and a small shaft; the seal ring is directly vulcanized on the valve seat; two symmetrical semicircular valve clacks are arranged in the valve body through the valve shaft; the valve shaft is provided with two torsion springs; one end of each torsion spring is attached to the backs of the valve clacks, while the other end is buckled on the small shaft; two rectangular limit blocks are respectively arranged on two sides of the valve body; the limit blocks are provide with an upper hole and a lower hole; the valve shaft and the small shaft are respectively arranged in the holes of the limit blocks; a check ring is arranged outside the limit blocks; and the check ring is connected with the valve body in a spot welding mode. The double-clack check valve has the advantages that: the valve shaft and the small shaft adopt a build-in structure so as to radically stop the possibility of valve leakage; and the double-clack check valve has a simple structure and is convenient to machine.

Description

Technical field [0001] The invention relates to a valve device, in particular to a double disc check valve. Background technique [0002] At present, the valve shaft and small shaft of the double disc check valve used in the field of metallurgy and chemical industry adopt the external structure, and a through hole is opened in the corresponding position of the valve body. After installation, it is sealed with a rubber gasket and a screw plug to prevent leakage. In the case of high pressure, it is easy to cause the valve leakage site. Contents of the invention [0003] In order to overcome the deficiency that the valve shaft and the small shaft of the existing double-disc check valve cause external leakage of the valve, the invention provides a double-disc check valve. [0004] The technical scheme adopted to solve the technical problem of the present invention is a double-disc check valve, including a valve body, a valve disc, a valve seat, a sealing ring, a torsion sprin...

AI Technical Summary

Problems solved by technology

[0002] At present, the valve shaft and small shaft of the double disc check valve used in the field of metallurgy and chemical industry adopt the external structure, and a through hole is opened in the corresponding position of the valve body. After installation, it is sealed with a rubber gasket and a screw plug to prevent leakage. In the case of high pressure, it is easy to cause valve leakage.

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