Biswitch automatic spraying valve

Abstract

The invention relates to a biswitch automatic spraying 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 memory alloy is sleeved on an adjustment rod; the upper end of the memory alloy is contacted with a spring cap, and the lower end of the memory alloy is contacted with the valve cover; the inner diameter of a spring ring encircled by the memory alloy is smaller than the outer diameter of the upper part of the movable rod; the spring cap is connected with the top of the adjustment rod; the movable rod is positioned in the valve cover; a screw thread is formed on the adjustment rod; a screw thread hole is formed at the upper end of the movable rod; the adjustment rod passes through a middle hole on the top of the valve cover and is matched with the movable rod through the screw thread and the screw thread hole; and the outer diameter of the adjustment rod is smaller than that of the movable rod. According to the biswitch automatic spraying valve, the spring diameter of the memory alloy is reduced, so that the thrust produced by the memory alloy is several times greater than that of the conventional structure, and the reliability of opening the valve is greatly improved; and the valve can be opened or closed through manual fine adjustment during maintenance or test, so that the using effect is enhanced, and the use range is expanded.

Description

technical field [0001] A double-opening automatic spray valve belongs to the field of cooling and fire-fighting 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, compression spring, inner sleeve, magnetic core assembly assembly, valve core outer sleeve, valve core sleeve, piston rod; valve There is a cylindrical water outlet in the body, 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 th...

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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