【 Weak current College 】 sprinkler local application of system problems, causes and solutions

Automatic sprinkler system has been a noticeable increase in set range, partial application of the system as an automatic sprinkler system is an integral part, because of its design is simple, low cost, easy maintenance, and the beginning of the architectural interior is very effective fire suppression, the prospects are very broad application. But I recently on some local application fire fighting systems engineering examination found that the design, construction, supervision and other issues, these issues affect not only the reliability of the system, the more impact the security of the buildings. The following combination of practical work, check for problems and discuss together and make a few superficial responses.

1. local application of system design and construction of

One is allowed to expand the scope of local application systems. According to the automatic sprinkler system design specifications "(hereinafter" the regulation of injection), the first 12.0.1 local application systems for indoor maximum clearance height not exceeding 8m of civil construction and the reserve area less than 1000m2, day-to-day engineering units in the local application of system expansion to industrial buildings and an area of more than 1000m2 of civil architecture.

The second is local system nozzle selection error. Regulation under the spray, § 12.0.2 topical application system should use the quick response sprinklers, daily works of some units to reduce costs using normal nozzle, construction unit using building on local application systems are not familiar with weaknesses to covertly, deliberately choosing priced nozzle.

The third is the partial application of the system and indoor hydrant system and not science. Under the regulation of article 12.0.4 spray, fire hydrant water meet local application systems using water, local application systems and fire hydrant combined indoor water use, voltage facilities, fire pumps and water pipelines, actually here to satisfy four conditions can be combined: the fire water to meet the duration of the fire hydrant water use and water consumption of local application system; second, the fire pump flow rate should be at the same time meet the fire hydrant and local application systems flow; third, regulators pumps usually should meet local application systems of the most negative point pressure requirements; the fourth is combined with system pipe diameter should meet local indoor hydrant and application system flow requirements. While the daily project some units on these basic does not consider that simple thought from the fire hydrant system pipes connected sprinkler head is to set a local application systems, some units fire cistern water hydrant has to meet, and then increase the local application systems, in the event of fire, causing the water shortage, the caliber of indoor hydrant, such as direct additional 60mm local application systems, resulting in a combined system of water are not met, there is a fire pump itself only meet indoor hydrant system flow, such as the creation of local application systems cause fire hydrant effective range and nozzle pressure will not be able to meet the fire requirements.

Four separate sets of local application of system settings are not normative. Regulation under the spray, § 12.0.7 is municipal water supply at the same time guaranteeing maximum water consumption and local application systems of flow rate and pressure, the water supply pipeline to supply water directly to the system, it must be stressed is the largest domestic water consumption still to meet local applications of flow rate and pressure requirements, some units inlet diameter of 200 50mm and indoor water consumption of domestic water consumption is often a great bath etc, in this case an additional local application systems directly, clearly do not meet the system requirements, flow rate and pressure in the event of fire, local application systems do not reach the desired effect; the second is the urban water cannot guarantee that the system of flow and pressure requirements, but allows the pump from the urban water-supply pipe directly, the system set up directly from the city water supply pipe water pressure pumps of fire, the fire pump pressure here 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 system of water; the third is the urban water does not meet the system requirements of flow rate and pressure, or allow direct from the urban water supply pipe network, the system should be regulated by the spray called set pool, fire pumps, regulators system.

Fifth, the local application systems assist device settings are not in place. Under the control of spraying 12.0.5, article, topical 12.0.6 system should set alarm control unit, current indicators, pressure switch and signal components such as valves, output start pump control signal function, part of the scale of local application system should set alarm valve group, but some of the day-to-day work of local application systems assist device settings not complete, there is no set of projects.

Second, the existence of local application of system problems

Automatic fire extinguishing systems for local application form has many causes, can be summed up in the following areas: 1 building units fire insensitiveness to think as long as you have done a local application systems to meet fire department approval rate on the line; the second is a design unit of the vicious competition, price taking business application on the local system not to seriously check on site calculation of lack of research, experience the plot, design criteria and facts; third, the lack of strict fire audit checks, some examination staff on the requirements of the local system not to seriously consider that there is a design unit plot seal, there is no problem, on drawings and specifications for the lack of serious research; the fourth is set local application systems engineering is not large, no supervision, and construction units only pay attention to economic efficiency and tried in tubes, nozzles, auxiliary equipment, Jerry can save the province, or even use some fake and shoddy products; the fifth is seriously not fire acceptance, acceptance of staff before acceptance does not refer to the original audit information on water status and lack of understanding of equipment selection, only the naked and see whether there is a water pipe network and pressure meets the sloppy border.

III. strengthening local application systems strategy

One is to strengthen the fire protection laws and regulations of the propaganda. Fire departments should be through TV, radio, newspapers and other media to publicity fire laws and regulations in a timely manner to the construction units provide technical guidance and guide the construction units to establish safety awareness.

The second is to design and construction personnelTraining. Design is the source, the construction is the key, as the Fire Department should strengthen this type of fire safety and fire protection technology standards of training, enhance the design and construction personnel on fire-a comprehensive understanding of technical standards.

Three is to strengthen the fire protection engineering construction site inspection frequency and intensity. 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.

4. make full use of the facilities and inspection of the intermediary's role as the former fire-acceptance Road off. Engineering acceptance requirements construction before the party must fire detection, fire-fighting facilities installation 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.

5 the internal responsibility system is the strict fire protection. Fire examination, acceptance of staff should constantly improve their own quality, strict requirements to the fire building audit off, works acceptance, strict demands on designers at design time in accordance with the relevant design fire protection standard requirements to the design, construction personnel should be strictly in accordance with the Fire Department audit qualified drawings to ensure that the design and construction of the building fire safety and reliability. Further establish and strengthen the internal oversight, rounds out the system.