What are the advantages of the suspended dry powder fire extinguishing device? The pressure storage suspended ABC ultra-fine dry powder fire extinguishing device is the most commonly designed product in the pipeline project, because it is the lowest cost, simple structure, so what are the advantages of the suspended fire extinguishing device?
Installation method:
There is a storage pressure suspension mounting method, an upward spray model, with FZX-ACT4, 5, 6, 7, 8, 10, 12, 14/1.4Kg eight specifications, it is the most specifications in China, most manufacturers do not have 12, 14 These two specifications.
There is a storage pressure wall-mounted installation method, horizontal spray, with FZB-ACF5, 10/1.4Kg two kinds, which belongs to the special type of wind turbine nacelle, and can be used in the pipeline rack, suitable for horizontal narrow pipeline structure. Generally, manufacturers do not have such a structure.
Product specifications:
It can be matched with various types of structures and projects of different sizes, in line with the design concept of the latest design scheme for the optimal spacing of two suspended fire extinguishing devices adjacent to the pipeline gallery, which is 4 to 8 meters. The total cost of the project is the lowest and the most economical. If 12 and 14Kg specifications are used instead of 8 and 10Kg, the total cost and maintenance management cost can be reduced by more than 30%. When designing Lida, it is necessary to focus on the three specifications of 10, 12 and 14Kg and the design concept of the optimal spacing of 4 to 8 meters. It will greatly reduce the competition.
The valve of the sprinkler head on the suspension-type fire extinguishing device adopts NPTF precision type dry type (without packing), high strength, high sealing performance conical pipe thread and low temperature double sealing structure, which makes each tooth top and tooth bottom of the thread fit closely without clearance after threading, and the product and structure have obtained patents. It can withstand low temperatures of -40℃ to -45℃, has good high and low temperature sealing performance, has a long storage quality guarantee period, and has a low cost of daily maintenance. At present, most manufacturers use M30x1.5 threads, and the material of rubber O-rings is generally ordinary rubber or nitrile rubber, which can withstand low temperatures of -10℃.
Starting device:
The glass bulb electric starting device of the suspended fire extinguishing device sprinkler has three structures:
The first type is the electric blasting starting device (electric fuse) and the glass ball are completely wrapped together with insulation tape, and to prevent loosening and falling off over time, they are tied with nylon straps, and the glass ball is completely wrapped in insulation tape, which will lose the automatic starting function and the nozzle plug may not fall off sometimes, because the wrapping material supports the nozzle plug, which may lead to the above major defects. Article 5.4.6 of the Product National Standard GA61-2010 stipulates that in order to prevent the electric blasting starting device from being accidentally started, a double electric blasting starting device component should be used on the glass ball, but most manufacturers only install one electric blasting starting device, because the glass ball is too small and there is no space. Many government bidding documents and design institutes prohibit the use of this structure.
The second is to use the “S” type heating resistance wire shape and wrapping material to wrap the glass ball with an “Ω” structure, more than 70% of the volume of the glass ball is wrapped, which may extend the time of the glass ball sensing temperature automatic start, many pipeline bidding documents and design institutes require the volume of the wrapping material to be less than 50% of the volume. Since the wrapping material has a certain height and strength, the nozzle plug may not fall off completely sometimes, which will seriously affect the jet performance.
The third type is an “O”-shaped heating resistor wire tightly wrapped around a glass ball with a diameter of Ф5mm. A small gap length of 6mm, fragile quartz tube is then wrapped around the resistor wire to insulate and heat the resistor wire, reducing heat loss and allowing for quick startup in just a few seconds. (The length of the glass ball is 15mm) The wrapping length should not exceed 40%, without affecting the automatic startup function of the glass ball that senses temperature. The quartz tube is a thin-walled, fragile glass tube. Coupled with the 9mm gap between the quartz tube and the nozzle plug, the quartz tube quickly breaks and the nozzle plug falls off entirely after startup. The hanging fire extinguishing device of Lidahai Xinxin company uses a non-electric blasting type of power-free fixed temperature glass ball and a power-resistant resistor wire electric heating automatic and manual three types of startup device. The device has applied for multiple patents for protection.