【 Weak current College 】 fire auto-alarm control system equipment running situation reflects the problems and solutions

Summary: in recent years, with the social and economic development, increase of high-rise building and fire safety management work of strengthening, building automatic fire-fighting facilities is also increasing, even better. However, according to market research, as well as in the last few years of fire inspection, found in the building fire alarm system installation, administration, and so there are some issues, summarized as follows, for the reference.

From 1990 the 10 years, China's automatic fire alarm development already has a considerable scale, has many manufacturers, product variety and its compatibility is relatively complete, product quality is close to the international level, and improve the product design specification, fire supervision departments management gradually focus, product and fully able to meet the high civil and industrial buildings. However, as the manufacturer and product number and lot number of high-rise buildings, but also found a lot of problems if not timely resolution, will affect the building fire alarm system and its linkage system to work properly, will cause serious loss to the country.

Through the installation of automatic fire alarm system architecture for a unified check and found that the majority is undeniably the operating status, including the introduction of foreign products, and also has some issues, there is a considerable number of works as false positives and downtime. Inductive operation reflects the problem that there are four aspects to be solved:

First, the automatic fire alarm system engineering design problems.

Relevant documents, the fire alarm system design should have a design qualification units and design personnel, to ensure that the system design quality. Obtain design qualification of design and design, automatic fire alarm system design quality is better in General. But here also there on the above content know very little of designers to design tasks; some engineering company for more money, but also the courage to change or abandoned the original design, giving the user a set of another; what is more, individual electrical contractor team, the renovation team even dare to secretly sneaking around and fire alarm system design (small). These are difficult to guarantee the quality of design.

Since the design does not understand the background to protect the site and the nature of the fire could occur, the probe types, protection area and should be installed on a variety of preventive measures, there is a big problem. These are also the design part of the automatic fire alarm system cannot function properly.

2. fire alarm system and product quality issues.

Current portion of the automatic fire alarm system was first installed running soon, and some time to appear does not run correctly. Reflect the main question is smoke detector more false positives, false negatives, linkage equipment cannot be linked, not to supply manufacturers and installation team of timely repair, the user is unable to process, and had to stop.

1, now a large number of applications on the market of the detector is not every one can reach the check sample specifications. A large number of the production process used by the components although filtering aging, finished the response threshold calibration, but is not a 100% up to standard, and has been instrumental in maintaining stability. What's more, not each process can be very serious. Production process is not very strict, and may result in the background using the place the detector environmental conditions change, such as temperature, air temperature, water vapour and dust content changes, serious some were electromagnetic fields and electrostatic interference, etc., as well as the existence of these changes, the detector's action threshold will change as the role of these factors, the false alarm rate increase.

2. automatic fire alarm system of the linkage controller parts specifications and performance, individual self-contained (non-standard), rarely common. Some manufacturers also do not match, there are certain difficulties in the application. Several manufacturers of products supporting applications, many of the issues that barely resolved, running fails.

To sum up, the probe products and product quality, to be solved background conditions interfere with the reliability of the detector, resulting in structural design, circuit design, consider these various interference effects, and improved, while at the same time in testing standards to make consequential amendments to reliability and assurance standards, in accordance with the standards of scientific testing probes can increase as reliable. Only guarantee the product quality can reduce system operating problems.

3. automatic fire alarm system problem in construction.

Construction of automatic fire alarm system, although the majority of the qualified professional engineering firms, but also many works by non-professional engineering company, such as the decoration company, the electrical installation team, cannot be carried out in strict accordance with the construction specifications.

1. in the multifunctional building, various system no less than ten kinds of automatic fire alarm system alignment often and other system alignment mixed up together, wiring clutter, threading and rarely leave allowance, tube conductor space is relatively large and therefore vulnerable to injury conductors and insulation, the wire connector soldered or insulation does not strictly, to the future long-running laid.
2. detector wiring and alarm controller terminals wiring is not strong, there might be a loose and bad, the time may result in failure.
3. detector saved incorrectly before installation, from dust, humidity, and even the impact of the collision, and so on will make the detector performance negative changes occur, at run time, such as false positives can occur.
4. system linkage controller parts of installation and debugging is often not strictly, it often fails.
5. commissioning review project failure, often on the controller function checks for incomplete or missing items in future often fail to run.

6. acceptance of delivery before running the test time is short, there is no full time exposure of construction and installation of vulnerability is delivered, the system goes into production soon a lot of problems, give users a "automatic fire alarm system is not working properly" impression.

Construction and installation problems, it is only through rigorous implementation of the construction of automatic fire alarm systemAcceptance of the provisions concerning specifications, in order to unify, to resolve. In the implementation of the specification process, fire supervision agencies should always check the construction site, does not comply with the requirements of the workers. Acceptance, designers respond to construction and installation of technical information and on-site installation situation seriously review meets the design requirements. When it finds a problem should be immediately corrected to ensure the quality of the installation. Run the test time should be at least a week or more, insufficient time should be deferred acceptance, acceptance of the system when not in use.

IV. running maintenance problems.

Large building user, on the automatic fire alarm system of management with trained professionals responsible for operation and maintenance, most small users are ignorant of the custody of the person on duty, no matter what kind, run record almost are not comprehensive. Running maintenance problems, there are roughly:
1. run record is incomplete, resulting in difficulties in finding reasons for servicing.

2, a small number of detectors false positives and other small issues, not worth the trouble to find or fear rather than find a repair to repair the goods manufacturers, question troubles, the system is not functioning properly anymore, and now want to resolve and repair factories cannot get at once, resulting in the system longer is not normal. Some users also felt that the system is not reliable or receive maintenance and simply shut down, and this is causing system "paralyzed".

3. automatic fire alarm system has many years of operation, the probe had never cleaned (now cleaning manufacturers also not many), scale, reliability significantly reduced. So often this false positive, the false positives, which give users a great illusion, that the system is not reliable, redundant, or even feel that it is better to conduct fire safety check more artificial come easy.

On the above issues, fire supervision bodies found later should urge users to solve, and oblige the supplier manufactures timely maintenance. Manufacturers should also be very good after-sales service, quality tracking survey, solve product quality and operation problems. Through the joint efforts of both to ensure system uptime, play the role of the system.

Automatic fire alarm system run reflected in these four aspects, the parties concerned as soon as possible to resolve, so that the installed system fully effective, practical and up to the protection of State property and the role of people's lives and safety, in particular future bus system microcomputer intelligent system of a large number of application, on the four issues should pay more attention to, should as much as possible to avoid these problems.