【 Weak current College 】 automatic fire alarm system retrofit replacement---Power By 【 China power house network 】

This article is the automatic fire alarm system and the replacement of the development of ways of

I. introduction

With computer technology and the rapid development of information industry, automatic fire alarm system from the 1980s in China appears to have undergone a number of generations. As time passed and the upgrading of products, some put into operation more than 10 years of automatic fire alarm system has come to life, the failure rate of increase and the shortage of spare parts, making many buildings of the property company required the automatic fire alarm system of references in the replacement of the agenda. I have automatic fire alarm system of practice experience and explore the vast number of peers.

Second, the automatic fire alarm system development

Fire industry is related to public safety, the special nature of the industry in China's reform and opening up the rapid economic growth of the premise and a few years ago the strong real estate market investments, fire industry developed rapidly, particularly fire automatic alarm system production industry is the leap-development. Automatic fire alarm system is a modern high-rise building set in one of the important fire facilities, is for the early detection and notification of a fire, and be able to take effective measures to control and extinguish fires and set in a building or other place of a fire protection system. Is essential to intelligent building.
Development of automatic fire alarm system, can be broadly divided into four stages: (1) multiple wire switch quantity-fire detection and alarm system, the first generation product, there are currently no manufacturers reproduction, it has the status of being eliminated. (2) bus-addressable switch quantity-fire detection and alarm system. Particularly the second bus switch signal-detection and alarm system many old buildings are still in use (3) analog transmission type intelligent fire alarm system, third-generation product, currently in my usage is highest is this generation of products. (4) digital distribution Intelligent detection system, the distribution of intelligent systems in retention intelligent analog sounding system advantages formed on the basis of the detector and the controller is via bus for two-way exchange of information, not only controller implements intelligent processing, even the probe also has a smart analysis capabilities. This digital distributed intelligent alarm system will become the fire alarm technology development lead direction. Currently on the market, you need to carry out the automatic fire alarm system is basically a reconstruction of the first two generations of products, often use this two generations of product architecture is often largely built in the mid-1980s to the mid-1990s, and these early automatic fire alarm system design service life is generally 10-20 years. Use the date is also the high incidence of the failure, false positives, frequent, manufacturers of products already for the replacement spare parts for the old system also gradually cut off, and supply shortage will cause the system to increase significantly the cost of maintenance. Leading to the transformation of the old system requires more strongly.

3. replace the transformation of the implementation of

Since I work in nature, I work too much contact with the automatic fire alarm system improvement project. Summary, General renovation of implementation there are three ways, namely: full renovation, half-way and gradually transform transformation. Following we explore a variety of implementation,

1. The whole renovation
Full implementation of the reform is the original full automatic fire alarm system, including the original installation of replacement of all signal lines and the line of control. In fact, this method is equivalent to reinstall a new fire alarm system, and the new building, the difference is how the whole transformation can only be prescribed line laying pipe laying, cannot implement embedded laying. This whole transformation typically associated with the building's overall decoration scheme together. Usually this way to the high cost of reconstruction, but also is the most thorough renovation, construction of the most convenient, on subsequent maintenance work the most favorable manner. Thanks and new buildings of automatic fire alarm mounted little difference, this is not a detailed narrated. China life insurance co., Ltd. Guangzhou Branch Office building fire alarm system is the full transformation.

2. Half-transformation
Half of implementation is only replaced the automatic fire alarm system of alarm and control facility (including a smoke detector and heat detector, monitoring modules, control module and control system of the host, etc), retain the original signal and control wires (if line laying quality good, the lines are often used for decades without problems). In this way compared with the total transformation is saving the cost of line laying, and relatively low cost. This method applies to the original automatic fire alarm system installation quality is good. This way, the early analysis check line workload relatively large, the builders of the relatively high technical requirements, if the construction personnel have the automatic fire alarm system maintenance experience, makes the project much faster, save time, reduce the impact of the reform the system. In addition, this approach in selecting a new fire alarm system, the range is relatively rare, essential requirements for the new system and the difference between the old system cabling is not great, and the difference between the total transformation of the way, the renovation costs will increase. Guangdong Museum of reconstruction of automatic fire alarm system is used in this transformation half.

3. Progressive renovation
Gradual reform implementation is graded batches on system equipment replacement, according to the actual situation developed year replacement program, according to plan until the system has been replaced. At the same time as the original line, selective on line to be transformed. Year after year replacement program-span is usually 2-5 years, the replacement of equipment can be divided according to the floor, or under the system of loop (usually a fire alarm system is divided into a loop, the for each loop to connect several devices). Gradual improvement in the replacement process is inevitable there will be two sets of system running at the same time, implementation of monitoring. This will not appear the two systems do not use either of the problem?, in fact, in a building of two simultaneous running of automatic fire alarm system monitoring (includingSmoke detector and heat detector, monitor module) can be run independently, without the need to address both issues are linked control problems. Usually different systems have their own applicable control modules, according to the principle of automatic control, different systems of control module you can toggle through the associated control each switch control technologies, current market sales of automatic fire alarm system can be implemented through this technology, use control linkage to solve the above problems, in fact two different set of automatic fire alarm systems in parallel operation is entirely feasible. Gradual transformation has two major advantages: firstly, the system of batches, the total cost of the reconstruction can be assessed every year. Second, the old system replaced equipment can be used as the old system of faulty equipment replacement parts, reducing the failure rate of the old system, making the system stable operation. Shantou Golden Bay Hotel's automatic fire alarm system is a gradual transformation.

IV. Summary

As information technology and the development of the industry, I believe that more and more buildings need to be transformed automatically alarm system, I have past experience in the automatic fire alarm system improvement project, summarizing some experience, hope you can give to colleagues to share, or want to give some thought to the automatic fire alarm system of property management with little thought.

Reference documents
1. the automatic fire alarm system design code — GB50116-98
2. Liang Hua authoring the building weak electricity Engineering Design Handbook, Chinese construction industry press