【 Weak current College 】 senior electrical design intelligent community fire---Power By 【 China power house network 】

1 Introduction

1.1 with the development of the society, people's living standards and increasing demand, there is the concept of family is not only just lived quite as simple, home entertainment, has gradually become even Office. Today's smart community with electrical appliances, modern plastic material, wiring-intensive features, once the fire consequences unimaginable.

1.2 from market point of view, the current real estate commercial launch of the so-called intelligent community in terms of electrical design fire protection, fire-fighting equipment was limited to a fire hose and a fire extinguisher, but most people do not fire training, even a fire hose and are not used, in the event of fire, a huge loss, the situation for financing the purchase of millions of households, is grossly unfair. According to the questionnaire show Guangzhou City has 878 per cent of the intelligent community household on the living unit of fire protection design, with 765 per cent of households that purchase costs increased by 10 per cent, but with a better design of the community they would still be preferable.

In this context, real estate developers if timely introduction of the concept with "security" intelligence community will be very welcome.

2 fire electrical design

In accordance with the high civil building design fire protection standard law, a 19-storey building including fire and above normal residence; building height exceeding 24 senior residence, advanced hotel, etc. This article discusses advanced intelligence community are a class of fire building.

2.1 automatic fire alarm system

Automatic fire alarm system for early detection and timely notification of fire, in order to take effective measures to control and extinguish the fire while the settings in the civil architecture of an automatic fire-fighting facilities, and fire fighting.

According to the different buildings fireproof grade, the automatic alarm system uses a different structure, generally speaking, the alarm system has the following three types.

A. Control Center and alarm system, alarm system control center components shown in Figure 1. Central fire alarm control unit located in fire control room, other fire-fighting equipment and linkage control devices, can be dispersed to long control and centralized remote control in two ways, each fire equipment working status feedback signal, the fire must be set to display in the control room to monitor or total console, so that the building fire safety facilities for comprehensive control and management. Control Center warning system detection range up to hundreds or even thousands.

B. central alarm system consists of central alarm system as shown in Figure 2, should be set by hand on-duty room or indoor fire watch, if set alarm is not located in the fire control room, you should set its output signals to fire control room, which has contributed to building the entirety of the automatic fire alarm system centralized monitoring and management.

C. regional alarm system consists of the alarm system as shown in Figure 3. Regional alarm system, its area alarm controller should not exceed three, because the focus is not set, when the fire alarm controller alarm zone too scattered and not facilitate centralized monitoring and management.

The above three system should be in the actual design process according to the case selection

2.2 alarm system selection of fire detector

Fire detectors are automatic fire alarm system test components, of the types shown in Figure 4, it will fire at the beginning of the heat, smoke or light into electrical signals, the signal exceeds a certain value, passed to the associated alarm control device. The work of the stability and sensitivity specification has a direct impact on the entire run of the fire protection system.

At the beginning of a smoldering fires, which has a large class of smoke and a small amount of heat produced, with little or no fire flame radiation (such as cotton, linen fabric of ignition, etc.), you should choose the smoke detector. In order to have discovered fire hazard, intelligent community should adopt such a detector.

For smoke detector, non-smoking, clean and environmental conditions more stable places, such as the computer room, library, etc., choose Ⅰ-sensitivity, for general purpose, such as bedroom, living room, etc., use Ⅱ-sensitivity. For a small amount of smoke regularly, environmental conditions often change places, such as a conference room and malls, the choice of class sensitivity.

2.3 alarm system selection of automatic alarm controller

Automatic fire alarm controller power supply for fire detection, to accept, display and transmission of fire alarm signals and output control directives of an automatic warning devices. It can be used individually for automatic fire alarm, or in combination with automated disaster prevention and extinguishing system consists of interlocking, automatic alarm linkage control system.

Alarm controller according to the nature of their role and can be divided into area alarm controller and centralized alarm controller. Area alarm controller and centralized alarm controller in its composition and working principle is similar, but on the basic choices include the following differences:

A. area alarm controller control range, it can be used alone, and centralized alarm controller responsible for the entire system, and cannot be used separately;

B. area alarm controller signals from a variety of probes, centralized alarm controller input from regional alarm detectors;

C. regional alarm detectors must have a self-test feature that set alarm controller should have post and inspects two functions. Due to the difference, so it is on the used two cannot mix business with pleasure. When the monitored area hour exclusive use of one area alarm controller consists of automatic fire alarm control system, but centralized alarm controller cannot replace area alarm controller and used separately.

3. fire-fighting facilities for power distribution

3.1 guarantee reliability of electricity supply

Due to this article on intelligent community-building a fire, So the design time to study with the supply Department to determine if two separate power supply circuit, to ensure that the fire power, if necessary, should be provided with an emergency power diesel generator, and the reserve battery pack as the third power, ensure that the needs of fire communication system.

3.2 flexibilities that wiring

Fire protection system of distribution mode to simple and flexible, easy for maintenance management, can adapt to changes in load, and have the necessary room to play. Fire electricity equipment distribution according to zones. Fire electric equipment of both power supplies or two power supply circuit switch should be in the end.

From the distribution box to fire-fighting equipment should be radial distribution, each circuit protection separately set so as not to affect each other. Distribution lines no leakage protection device you can set the single-phase warning device to monitor the circuit ground fault occurred.

3.3 installation methods of distribution line

In order to supply safe and reliable, the distribution lines of fire fighting equipment, fire-resistant should use of the copper conductor insulated conductor copper pipe laying, wire cross section should be appropriate to relax, because in case of fire, likely due to wire resistance heating and makes the circuit. If the lines laid in non-combustion structure inside the protective layer thickness should not be less than 30 mm, that should be established in the tube to take fire protection measures. Construction time is usually put the fire pump of distribution lines embedded floor or floor; stairs of the laying of emergency lighting in the scissors wall, or floor.

Due to the junction box junction box Panel of fire prevention measures are not a good solution, General take increased steel pipe diameter without Terminal box, or in difficult burning parts of the laying of the junction box and pull cable boxes.

These are my to advanced smart community fire electric design views, hope to play a catalyst role.