Improved passive automatic fire-fighting spray valve

Abstract

An improved passive automatic fire-fighting spray valve comprises a valve body, a valve core and a passive power module; the valve body and the valve core are integrally molded; and the passive power module comprises a piston diaphragm, a piston rod, a mounting support seat, a magnetic monopole, an outer protecting cover, a pull rod and a memory alloy spring. The memory alloy spring extends to drive the magnetic monopole to move when sensing that the ambient temperature change reaches a certain value, the piston rod is driven to move under the magnetic effect, the piston rod can move up and down to block or loosen a pressure relief hole in the piston diaphragm, and the piston diaphragm is controlled under the hydraulic effect, so that whether the water flow can pass the valve core is controlled. The valve has the advantages as follows: the improved spray valve has the characteristics of being simple in structure and easy to machine and assemble; and secondarily, the memory alloy spring senses the ambient temperature directly, so that the reaction speed of the memory alloy spring is more sensitive, the spray valve can be opened and closed timely according to fire-fighting requirements, and delaying is avoided.

Description

technical field [0001] The invention belongs to the field of automatic fire control equipment, in particular to an improved passive automatic fire sprinkler valve. Background technique [0002] In the existing fire protection system, the smoke ion sensor and the glass bubble type water spray head are installed in the room, which can only be applied in higher-level buildings such as hotels, restaurants, and office buildings. When the temperature of the glass bubble type water sprinkler head increases rapidly, the organic solvent in it evaporates, causing the glass bubble to break, and the fire water connected to the glass bubble will spray down, thereby inhibiting the spread of the fire. This disposable device cannot cut off the water source on site, let alone automatically close the valve after the ambient temperature drops, so after the fire is extinguished, the broken glass bubbles will still be sprinkled with water, and a large amount of precious water resources will be w...

AI Technical Summary

Problems solved by technology

[0004] In the process of use, the inventor found that the structure of the spray valve is relatively complicated, and the manufacture and assembly are relatively cumbersome, and because the memory alloy spring does not directly sense the ambient temperature, it is transmitted to the memory alloy spring after heat is collected by the heat collecting cover. , leading to a decrease in its sensitivity

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