【 Weak current College 】 on automatic sprinkler systems contain intensive site accident effects

All fire organization area of small singing rooms, bath, Internet Cafe and fuel more small shops, warehouse check also have found such a place exists more fire hazard.

The building area is generally between 100-1000 square meters, have lower levels of fire-resistant, with 70 to 80 's decoration transformation, mostly use comprehensive building local, commercial and residential building bottom and along the facade decoration for second, due to the changing nature of the original building, using, without authorization by function, use large amounts of combustible material for decoration, the works of fire danger clearly increases, the original building fire facilities were far from being able to meet the requirements of fire safety in these establishments. However, pursuant to the architectural design of the fire code requirements, these sites often to set an automatic sprinkling system standards. More than 90% of the small personnel-intensive sites formation by late Reformation, uniform set of standard sprinkler system is difficult. First, urban land, there is not enough space and space set fire water tank, fire pumps and equipment; the second is the most private investment management, fire-fighting facilities invest too much personal unacceptable; and third, in these places, no less special on system maintenance.

According to the survey, some public entertainment set for automatic sprinkler system due to lack of maintenance, the pump has stopped, linkage has been corrupted, you can only rely on roof tanks of water to maintain pressure. While basic local application systems do not need to maintain, as long as the water supply main valve open, system pressure displays properly. Domestic and international practice shows that the sprinkler system is safe and reliable, economical and practical, the success rate is high, and fire sprinkler local application system has less investment, the effect is good, easy maintenance, and more importantly to effective prevention group dead injury accidents, protect people's lives and property.

I. standard wet sprinkler systems and automatic sprinkler local application systems. Standard wet sprinkler systems by fire water tank, fire water tank, spraying pumps, wet alarm valve, nozzle, etc., pipeline always filled with water and keep a certain pressure, the system has been in a State of alert, in the event of fire, the indoor temperature to rise, resulting in a nozzle automatically open, pipeline pressure water squirted out of the fire. At the same time, due to the water before and after wet alarm valve caused by pressure differences, through pressure switch start spraying pump water supply to the system. Automatic sprinkler local application system reduces fire water tank, fire pumps, wet alarm valve group and other components. The principle is: full use of the cities of tap water, high fire water tank and indoor hydrant system guarantees that the sprinkler system.

Second, the scope of the partial application of the system in the automatic sprinkler system design specifications "(2005 Edition) in the" partial application system for indoor maximum clearance height not exceeding 8m of civil architecture, local settings and the protection of regions with a total construction area of not more than 1000m2 of wet system "in my view for the" set in the ground, underground or ground-up to and including four stories above or set in the building's first floor, second floor and third floor and any layer construction area is larger than the Earth dance 300m2 installstion "such a place still need to set the standard for wet sprinkler systems. And shall not extend to the local application systems for industrial buildings and an area of more than 1000m2 of civil architecture.

3. local application system nozzle selection for the spray control law "should be used for local application system esfr, spray intensity should not be lower than the continuous spray min.m2 6L/time should not be lower than 0.5h" esfr refers to response time index of RTI ≤ 50 (m.s) 0.5 flow coefficient K = 115 K = 80 or closed sprinkler. Quick response sprinklers and conventional sprinkler, the fight more effectively, improving initial fire sprinkler system efficiency. In some units selection for lower costs, as well as ordinary nozzle of construction units use building on local application systems are not familiar with weaknesses to covertly, deliberately choosing priced nozzle.

4. local application systems of water supply facilities of the spray control law "when water hydrant can meet local application systems using water, local application systems and fire hydrant combined indoor water use, voltage facilities, fire pumps and water pipelines, etc. "It helps to reduce cost, ease of construction. But the General need to set the local application systems are revamping project of old buildings, the building of indoor hydrant system is intact and pressure, flow, pipe diameter meets the requirements you need to carefully design, water for fire fighting, voltage facilities, fire pumps and water pipelines have a condition, you may not be combined with the water supply facilities. The spray regulation also provides for three other "1 water supply, urban water supply can ensure maximum water consumption and flow rate and pressure systems, urban water supply pipe water directly to the system; 2. municipal water supply cannot be guaranteed maximum water consumption and flow rate and pressure of the system, but allows the pump from the urban water-supply pipe directly, the system can be set directly from the city water supply pipe water pressure pumps for fire-fighting; 3, urban water supply cannot be guaranteed maximum water consumption and flow rate and pressure of the system does not allow direct from the urban water supply pipe, the system should be set tank and fire pumps, the tank of effective volume should be determined by the system of water consumption, and ongoing sprinkler system can be deducted from the time still continuous water's water supply. "These three water supply, the authors suggest that designers on urban water supply and system verification with the Park's calculations as far as possible, adopt the second way. In this way in urban water supply pipe on direct fire pressure pump, that is, saving investment, improve construction progress, is able to guarantee that the system of flow and pressure. Note here the fire pressure pump is not an ordinary pumps, regulators pumps, more is not, but rather to meet system flow and pressure pumps, regulators pumps of units, usually feel the pressure to meet within the system, in the event of fire, do not meet the requirements of the water system.

5. fire protection agencies to local applications of management of local system is already very simple fire extinguishing system, in the construction process any componentIs essential, do not allow the quality and construction issues. Fire departments should be on building fire engineering construction site for regular and periodic inspection, construction installation not in strict accordance with relevant State regulations for construction, found together, and together, completely reversing the building fire safety engineering and construction management is not strict and shoddy work. At the same time strengthen the execution of the construction of the figure, unauthorized change fire design, reducing fire technology standards, it is necessary to be a heavier fine soon. And local application systems and standard wet sprinkler systems in the acceptance must be qualified by the fire-fighting facilities. Through the fire facility inspection agency powerful technical tools and test equipment for fire-fighting facilities for a wide range of scientific testing and inspection reports issued by the appropriate, while for buildings in fire protection products, including fire-fighting equipment and pipes, must provide the national fire protection administration for quality supervision and inspection center of building materials and building products quality supervision and inspection center inspection qualified inspection report and the report on time with the latest bulletin of time.