1 project overview
A hospital under construction with a total floor area of 119,650m2 (including the ground floor of 36,461m2), the construction of a general hospital beds 1,000, the main construction content of an emergency, women and children, medical and technical complex and a ward building and related auxiliary rooms. Among them: ward building underground 1 layer, up to 16 floors above ground, the total height of the building 66.6m; outpatient and emergency medical technology complex project, 4 floors above ground, 1 floor underground multi-storey building; building height of 17.8m. building design service life of 50 years, the building structural safety level II. fire resistance level I, components of the first level, the components of the first level. Fire resistance level one, components of the fire-resistant limit: floor not less than 1.5h; beams not less than 2.0h; columns not less than 3h; masonry not less than 4h. The basic wind pressure using W = 0.70kN/m2. Building fire is mainly used for fire hydrant fire extinguishing system, automatic sprinkler system, pre-action high-foam-water sprinkler system, fire fighting gases, automatic extinguishing system, miniature automatic scanning water jetting high-function system, fire fighting gases, automatic fire extinguishing system, automatic fire extinguishing system, automatic scanning water jetting system, fire fighting system, automatic fire extinguishing system, fire fighting system, automatic fire fighting system, automatic fire fighting system, fire fighting system, fire fighting system. System, miniature automatic scanning water jet overhead water cannon fire extinguishing system, high-pressure water mist fire extinguishing system and building fire extinguisher configuration.
2 new modern fire extinguishing system settings
Engineering according to different facilities, different parts, different building environment design different building fire extinguishing system. For high and low voltage distribution room, diesel generator room is not suitable for the use of ordinary automatic sprinkler system using high-pressure water spray extinguishing, such as nuclear magnetic **** vibration for such valuable medical equipment is also used for high-pressure water spray extinguishing system; for the outpatient and emergency medical atrium using miniature automatic scanning water cannon fire extinguishing system (see Figure 1); for the construction of computer centers set up the area of the pipeline network type Heptafluoropropane gas automatic fire extinguishing system. Propane gas automatic fire extinguishing system; for the basement garage selection of pre-action high-foam - sprinkler system; and for the general doctor's office, corridors, wards using automatic sprinkler system, the rest of the fire hydrant fire extinguishing system and fire extinguisher equipment to assist.
Engineering specific application of each fire extinguishing system is described as follows:
1) miniature automatic scanning water jet overhead water cannon fire extinguishing system is set up in the outpatient and emergency medical and technical complex of two atrium on the fourth floor, each overhead water cannon protection radius of 30m, each atrium installation of two overhead water cannons responsible for the atrium of the fire function. Aerial water cannon has many modern technology features: automatic positioning of the fire source, spotting and tracking the fire extinguishing function; the use of red and ultraviolet composite detection, image recognition flame detector three ways to confirm the fire, the use of image detection and recognition of the integration of localization technology means, effective shielding of various sources of interference with the fire detection speed, fire recognition, positioning accuracy, with 360 ° all-round fire detection function, the detection sensitivity adjustable. Detection sensitivity is adjustable.
Using a laser to indicate the positioning point; built-in signal acquisition device to achieve the water flow indicator function; control the pitch angle and horizontal rotation angle action function; support for fire detection and positioning identification of the fire source directly below; support for the detection and identification of a working condition of a number of fire source positioning; according to the size and shape of the fire source automatically adjusts the jet area to achieve the coverage of the jet extinguishers; and at the same time has an automatic inspection, detection in a timely manner, Efficient, accurate positioning, high fire-fighting efficiency, large protection area, fast response time and many other advantages; with fire detection function, visual function, you can view the scene, and at the same time to achieve the identification of multiple sources of ignition and accurate positioning of the continuous fire without gaps, automatically according to the size of the flame scanning fire, to solve the "black lights" fire extinguishing without dead ends, a set of Fire prevention, anti-theft, monitoring, automatic fire extinguishing in one, saving resources, reducing costs and improving efficiency. This system has these high-tech features, can also be used in large shopping malls in the atrium; railway stations, bus stations, airports and other large space waiting room, terminal fire extinguishing system.
2)High-pressure water mist fire extinguishing system protection area for ECT, PET, diesel generator room, oil storage, high-voltage power distribution, nuclear magnetic **** vibration, CT room, etc. fire type belongs to the B and E class fires, fire danger for the hazardous level, taking into account the characteristics of its fire high-pressure power distribution, low-pressure power distribution, air-conditioning distribution, distribution room selection of the pre-action system, the other protection area selection of open system, the system Set up a set of high-pressure water mist pumping unit for protection. High-pressure water mist system consists of high-pressure water mist pumps, water mist nozzles (see Figure 2), regional control valves, stainless steel piping and fire alarm control system, etc., partition valves, see Figure 3. high-pressure water mist fire extinguishing system has an open system and pre-action system of the two principles of operation; open system and pre-action system are equipped with three kinds of control modes: automatic control, manual control and emergency operation. Has a clean, efficient fire extinguishing, adsorption of smoke and dust, dilute the concentration of harmful gases, blocking radiant heat, cooling anti-reignition, conducive to the evacuation of personnel and relief personnel close to the many advantages; high-pressure water mist fire extinguishing system also has the convenience of installation, use of safe, adaptable, simple maintenance, improve the efficiency of the service life of a long period of time, reduce the overall cost and subsequent maintenance costs. So the high-pressure water mist fire extinguishing system is also used in the subway, library and archives, public **** building, data room, hotels and restaurants, tobacco warehouses and other places.
3)The fire gas automatic fire extinguishing system adopts Heptafluoropropane pipe network combination distribution system to protect 6 protection zones,*** set up 4 100L cylinders; 5 layers of UPS cabinet type Heptafluoropropane fire extinguishing system set. According to the full flooding fire extinguishing mode, communication room and electronic room and other protective areas. Heptafluoropropane fire extinguishing agent is a colorless and tasteless, no solid and liquid phase residues after extinguishing, non-conductive gas. Its extinguishing mechanism is consistent with the chemical chain reaction, but also to cool, reduce the role of oxygen concentration, its extinguishing mechanism and extinguishing efficiency and halogenated alkanes "1301" is similar to the Class A, Class B fires can play a good role in extinguishing the fire. Therefore, the fire gas automatic fire extinguishing system is mainly used in buildings in the computer center area, but because of the gas automatic fire extinguishing system is more prone to gas leakage and the need to replace the comprehensive cost and subsequent maintenance costs are relatively high, and has gradually been replaced by high-pressure water mist fire extinguishing system trend.
4) building fire extinguisher configuration: according to the "building fire extinguisher configuration specification", the building belongs to the severe hazard level, the fire type belongs to class A, the configuration of the benchmark 3A, the maximum protection area of 50m2 / A. Maximum distance of protection of the fire extinguishers in the building for the maximum protection distance of 15m, in the building under the fire hydrant box steel-aluminum fire cabinets in the set of ammonium phosphate dry powder fire extinguishers MF / ABC5 two, each one of them has a dry powder fire extinguisher MF / ABC5 two. ABC5 two, each fire extinguishing agent filling capacity of 5kg. In addition, the protection distance is insufficient to the region with a special aluminum alloy flip-type ground-type fire extinguisher box (580 × 360 × 200).
5) automatic sprinkler system: in addition to the above several special places other than the general office are used in automatic sprinkler system, such as doctors' offices, wards, aisles, lobbies, laboratories, pathology and other general departments; in addition to the consideration of the basement parking garage parking cars, also belongs to the more special places, designed specifically to use the pre-action of high-foam - water sprinkler system. -Water spraying system.
6) fire hydrant fire extinguishing system: once the fire alarm fire ambulance can be connected to the water rescue, belongs to the more normal building fire technology, in accordance with the specification requirements for the design of the layout can be.
The above is just a brief introduction to several modern building fire suppression system new technology in the application of this project, but the building fire has more flammable factors, spreading fast, to really ensure the safety of the people's lives and property, especially for public **** places like hospitals are many people, and relatively centralized, evacuation difficulties, in addition to making full use of modern technology to effectively extinguish the fire, it is important to pay attention to the usual fire drills. Still pay attention to the usual fire drills, enhance the public's fire awareness, in strict accordance with national fire codes, in the process of building design and construction of new building fire materials, fire design focus on fire partition design, safety exit settings, fire lane design and fire blocking and other design and construction work. At the same time also expect with the continuous progress of science and technology, can be invented to create more and more practical building fire fighting technology.
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