Closed-type high-pressure water mist fire-extinguishing nozzle

Abstract

The invention discloses a closed-type high-pressure water mist fire-extinguishing nozzle which is characterized in that a supporting member is arranged in a middle chamber (11) of a nozzle shell (1); a compacting structure (3) is positioned over the supporting member (5) and movably connected with the nozzle shell (1), a water passage (31) is arranged in the compacting structure (3), and a seal gasket (4) used for resisting water in the water passage (31) from flowing into the middle chamber (11) is arranged between an outlet of the water passage (31) and the supporting member (5); one end ofa temperature sensing element (6) positioned below the supporting member (5) supports against the supporting member (5), and the other end of the temperature sensing element (6) supports against the bottom of the nozzle shell (1); and a two-stage spray-collision type nozzle assembly which is communicated with the middle chamber (11) is arranged on the nozzle shell (1). The fire extinguishing nozzle can not only keep favorable sealability when a water supply pipeline is in a high-pressure state, but also effectively sense the occurrence of fire hazards in time and self-start to carry out spraying and fire extinguishment.

Description

technical field [0001] The invention relates to a fine water mist nozzle used in the field of fire fighting and fire extinguishing, in particular to a closed high-pressure fine water mist fire extinguishing nozzle. Background technique [0002] The water mist fire extinguishing system has the advantages of environmental protection, safety, strong fire extinguishing ability, less water consumption for fire extinguishing, less water pollution and wide application range. It is an environmentally friendly and efficient fire extinguishing technology and is widely used in the field of fire protection. The water mist nozzle is the key component of the water mist fire extinguishing system and the most important factor determining the fire extinguishing performance of the fire extinguishing system. According to the different starting methods, the fine water mist nozzles can be divided into two types: open type and closed type. Among them, the closed type nozzles can sense the occurre...

AI Technical Summary

Problems solved by technology

[0003] Among the fine water mist nozzles, the high pressure type (working pressure P≥3.5MPa) nozzles have the advantages of small droplet diameter and large droplet impulse, and the fire extinguishing performance is generally higher than that of the medium and low pressure type fine water mist nozzles. The use of high pressure increases the difficulty of design and manufacture of nozzle sealing and start-up structure

At present, there are many patents on domestic fine water mist nozzles, for example, the patent applications of CN200510048964, CN200610046409.2 and CN200810082869 provide 3 different atomization methods of fine water mist nozzles, but they are all open nozzles; the application numbers are The patent applications of CN200510081550.1 and CN200510096771.6 have provided medium and low pressure closed nozzles in the form of single nozzle and multi-nozzle, all of which are sealed by a sealing disc with a large contact area. Due to the low carrying capacity of the current temperature-sensitive glass ball, it cannot support high-pressure water flow pressure, so the above medium and low pressure atomizing nozzles are used in medium and low pressure occasions

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