^Technical Field]

Fire fighting system.

- Background Art :-

1- Field of the invention :-

1- 1 - The present work is related to low pressure water mist nozzle. It converts the water at low pressure to vapor while water is going outward through the nozzle.

1-2- Background of relate

1 -2-1 - all previous nozzles has there outlets from down ward position or from there Circumferential directions but they are not having from both directions.

1-2-2- the present invention has efficiency better than the previous patents.

1 -2-3- the working pressure is so Minimal comparing with others.

1- Disclosure of the invention :-

1 - Refer to fig. 1, it can be shun that when the fire occurs, the break glass

will be broken by expansion phenomenon.

The cop will be released and the needle is moved down word which allows water to go through the inlet of nozzle.

The mist will be developed from (4-12) outlets at the circumferential of nozzle. Also, there is mist will be seed from the face of nozzle through the clearance between the needle and the body of nozzle the material of all nozzle components made from copper. The dimensions of outlets between (1.5-2-3-4 mm) depends on the working pressure which is (3-7 bars) and density of water required for protected area.

The outlets will be smaller when the working pressure is greater.

The size of water droplets is varied between 900- 450 microns.

• T echnical Problem ;-

The problem in the old conventional fire fighting systems is shown in damage after using it. Also the capacity of water consumed by the old systems is very high comparing with this invention.

The previous inventions could not be used with black seamless steel pipes. They can only used with copper or stainless steel pipes. While the new invention can be used with any type of pipes. Also the cost of using copper or stainless steel pipes only is very high comparing with black seamless steel pipes in the project which is covered by fire fighting systems. Also the old invention cannot be connected with the conventional fire fighting systems which was installed in the buildings. They must have new arrangements specially the piping material.

Technical Solution :

The new invention can be used with black seamless steel pipes by adding anti- scaling solution injected in water. The new invention can be used with the installed conventional fire fighting systems depending on the total head required to operate the nozzles. So that the total cost of the protection by the new invention could be lower than the previous one.

The water mist generated is cooling down the fire and reducing the oxygen levels which extinguish the fire without any risk for human.

It is convenient to be used in Industrial Applicability and the cost of manufacturing is very low comparing with the previous inventions.

• Advantageous Effects :-

1 - The main goal of this invention is to use it with black seamless steel pipes complemented by

Using untie scaling solution system

2- It can be easily disassembled for maintenance purposes. 3- By moving the cover, break glass can be easily removed with the cup. Also the needle will be

moved to be out of the nozzle. So that, the nozzle scowled be cleaned from any blocking

subjects and it can be easily re assembled again without any damage.

4- One of the main objectives to use this type of nozzle to increase the efficiency of fire

fighting system by using low pressure water mist system. Comparing with the traditional

wet pipe sprinkler system.

Brief Description of Drawings :

Fig. 1 : shows that the assembling of all components in the nozzle.

Part. 1 is the cover used to prevent the flow to go through. It has different diameters Depend on the flow needed for protection, the height of ceiling and the type of hazard.

Part 2 is the needle which is used to block the passage of flow in part 1 and it is holded by two parts, 6 and 5 respectively.

Part 3 is the nozzle. It has from 4-12 outlets to convert water to mist at different working pressures from 3-7 bars.

Part 4 is the Break glass cover. It has two functions; the first one is to protect the break glass from damaging after installation in the network. The second is to align and hold the break glass axially with the needle (part 2) and cop (part 6)

Part 5 is the break glass, it has curtain fluid which expands in fire case at certain temperature, depending on the temperature required to protect the space, and break the glass to allow the flow of water to go through the nozzle. It has many types and different ranges of temperatures.

Part 6 is the cop which is located between the needle and the break glass. It is used to hold the glass and to prevent the needle to go downward. I Industrial applicability 1

Reference will now be made in greater detail to a preferred embodiment of the invention; an example of which is illustrated in the accompanying drawings. Wherever possible the same reference numerals will be used throughout the drawings and the description to refer to the same or like parts.

Part 3 is the nozzle. It has from 4-12 outlets to convert water to mist at different working pressures from 3-7 bars. It has also 4 guides located at its top to guide the needle in vertical position that allow water goes downward between the gap between the needle and the body of nozzle. The outlets around the circumferential of nozzle and the gap between the needle and the nozzle body increase the performance of fire fighting and increase also the protection area, Also the time of extinguishing the fire will be low. The mist will be developed from (4- 12) outlets at the circumferential of nozzle. Also, there is mist will be seed from the face of nozzle through the clearance between the needle and the body of nozzle the material of all nozzle components made from copper. The dimensions of outlets between (1.5-2-3-4 mm) depends on the working pressure which is (3-7 bars) .The outlets will be smaller when the working pressure is greater. The discharge of flow required is variable between 3- 6 GPM depending on the working pressure which is variable between 3-7 bar.

Part 4 is the Break glass cover. It has two functions; the first one is to protect the break glass from damaging after installation in the network. The second is to align and hold the break glass axially with the needle (part 2) and cop (part 6)

Part 5 is the break glass, it has curtain fluid which expands in fire case at certain temperature, depending on the temperature required to protect the space, and break the glass to allow the flow of water to go through the nozzle. It has many types and different ranges of temperatures.

Part 6 is the cop which is located between the needle and the break glass. It is used to hold the glass and to prevent the needle to go downward.

* Reference Signs List

1- US Patent Application 20060196681 - Fire Suppression Using Water Mist with Ultrafine Size Droplets, Application 20060196681 Filed on December 20, 2005. Published on September 7, 2006, Adiga, Kayyani C. Adiga, Raiani

2- Pendent-type diffuser impingement water mist nozzle 5839667 1 1/24/1998, Patent 5829684 Issued on November 3, 1998. Estimated Expiration Date: © October 28, 2016. Fishcer, Michael A.

3- US Patent Application 20080006721 - Mist nozzle Application 20080006721 Filed on July 6, 2006. Published on January 10, 2008, Huang, Yu-Chiung

5- Liquid discharge nozzle Patent 4585069 Issued on April 29, 1986. Estimated Expiration Date: ® October 18, 2004. Whitaker, George N.

6- Fire sprinkler apparatus Patent 4465141 Issued on August 14, 1984. Estimated Expiration Date: October 13, 2001. Johnson, Wilfred V.

7- Fire sprinkler systems Patent 6868916 Issued on March 22, 2005. Estimated Expiration Date: © March 25, 2022. Petersen, Francis

8-Water misting device 6592049 07/15/2003, Patent 6592049 Issued on July 15, 2003. Estimated Expiration Date: CI June 28, 2022. Wolput, Matthew Van