Automatic spray valve

Abstract

The invention relates to an automatic spray valve which comprises a valve body, a valve cover, a magnetic ring sleeve, a magnetic ring component, a movable rod, a bias spring, a valve cover, a memory alloy, a piston cylinder, a magnetic core component and a piston, wherein the upper part of the movable rod passes through a central hole of the valve cover and protrudes out of the valve cover; the memory alloy is sleeved at the upper part of the movable rod protruding out of the valve cover, the upper end of the memory alloy contacts a spring cap, the lower end of the memory alloy contacts the valve cover, the inner diameter of a spring coil formed by winding the memory alloy is smaller than the outer diameter of the lower part of the movable rod; the spring cap contacts the top end of an adjusting rod, the outer diameter of the upper part of the adjusting rod is smaller than the outer diameter of the lower part of the adjusting rod, and the adjusting rod is connected with the upper part of the movable rod. The double-opened automatic spray valve provided by the invention has the advantages that the spring diameter of the memory alloy is reduced in design, so that the pushing force generated by the memory alloy is several times larger than that of the previous structure and thus the reliability of the opening of the valve is greatly improved; and the valve can be opened or closed through manual fine adjustment when the valve is maintained or tested; since a polygonal limit structure is arranged on the central hole of the top of the valve cover, the installation and change of the valve are convenient.

Description

technical field [0001] An automatic sprinkler valve belongs to the field of cooling and fire automatic control equipment. Background technique [0002] The patent document with the publication number CN102235545A discloses a passive automatic fire sprinkler valve. The invention consists of a valve body and a temperature control head, and is characterized in that it includes a valve body, a piston diaphragm in the valve body, a piston sealing ring, and a valve cover , magnetic ring assembly, magnetic ring sleeve, return spring, valve cover, memory alloy, spring cap, adjusting nut, pressure rod, pressure spring, inner sleeve, magnetic column assembly, valve core outer sleeve, valve core sleeve, piston rod; valve body There is a cylindrical water outlet, and a piston diaphragm is installed on the upper end of the water outlet; there is a pressure relief hole on the piston diaphragm to cooperate with the piston sealing ring at the bottom of the piston rod; the piston rod presses...

AI Technical Summary

Problems solved by technology

Although the passive automatic fire sprinkler valve can be opened and closed automatically, due to the relatively large size of the memory alloy in the original design, that is, the spring diameter of the memory alloy is large, which affects the thrust during the deformation process, and sometimes it cannot be opened. The valve can only be left to fire, and the consequences will be unimaginable; in addition, it is impossible to manually fine-tune the opening and closing valve when it needs to be overhauled or tested in the application

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