Fires happen around us from time to time. There are many reasons for electrical fires in elevators, but they are mainly due to poor installation and daily maintenance of electrical equipment,

 

电气设备在运行中超过额定负荷，发生线路短路、过热和打火花而造成的。因此，需要配置符合规定的消防器材。

 

When the electrical equipment exceeds the rated load during operation, it is caused by short circuit, overheating and spark of the line. Therefore, it is necessary to configure fire-fighting equipment that meets the regulations.

 

一、发生火灾的原因

 

1、 Cause of fire

 

1、设备过热

 

1. Equipment overheating

 

引起电气设备发热的主要原因有：

 

The main causes of heating of electrical equipment are:

 

（1）短路；发生短路故障时，线路中的电流增加为正常时的几倍，产生的热量与电流成正比。

 

(1) Short circuit; In case of short-circuit fault, the current in the line increases several times as normal, and the heat generated is directly proportional to the current.

 

此时若温度达到可燃物的燃点时，就会造成火灾。

 

At this time, if the temperature reaches the ignition point of combustibles, it will cause a fire.

 

（2）过载；过载也会引起设备发热。造成过载有以下三种情况：一是设计选用线路和设备不合理，

 

(2) Overload; Overload can also cause heating of the equipment. There are three situations causing overload: first, the design and selection of lines and equipment are unreasonable,

 

导致在额定负荷下出现过热；二是使用不合理，升降机长时间超负荷运行，

 

Cause overheating at rated load; Second, the use is unreasonable, and the elevator runs overload for a long time,

 

造成线路或设备过热；三是故障运行，如三相电源缺一相等。

 

Cause overheating of lines or equipment; Third, fault operation, such as three-phase power supply missing one.

 

（3）接触不良；各种接触器触点没有足够压力或接触面粗糙不平，均会导致触头过热。

 

(3) Poor contact; The contacts of various contactors do not have enough pressure or the contact surface is rough and uneven, which will lead to overheating of the contacts.

 

（4）散热不良；电阻器安装不合理或使用时损坏、变形，热量积蓄过高。

 

(4) Poor heat dissipation; The resistor is improperly installed or damaged or deformed during use, and the heat accumulation is too high.

 

2、升降机周围存在可燃物

 

2. There are combustibles around the elevator

 

（1）升降机上的电气线路、开关柜、熔断器、插销、照明器具、电动机、

 

(1) Electrical circuit, switch cabinet, fuse, bolt, lighting appliance, motor

 

电加热设备等电气设备接触或接近可燃物非常容易发生火灾。

 

Electric heating equipment and other electrical equipment are very prone to fire when they are in contact with or close to combustibles.

 

润滑系统缺油，也可导致火灾的发生。

 

Lack of oil in the lubrication system can also lead to fire.

 

（2）升降机司机、登机检修人员随地抛掷的烟头和火柴棍等易燃物，也容易造成火灾。

 

(2) Cigarette butts, matchsticks and other inflammables thrown by elevator drivers and boarding maintenance personnel are also easy to cause fire.

 

（3）在升降机进行维修时，使用电气焊产生的火花飞溅物，落在升降机上而发生的火灾。

 

(3) During the maintenance of the elevator, the sparks and splashes generated by electric welding fall on the elevator and cause a fire.

 

二、灭火方法

 

2、 Fire extinguishing method

 

电气火灾发生后，电气设备可能因绝缘损坏而碰壳短路，电气线路也可能因断落而接地短路，

 

After an electrical fire, the electrical equipment may be short circuited due to insulation damage, and the electrical circuit may also be short circuited due to disconnection,

 

使正常不带电的金属构架、地面带电，从而导致接触电压或跨步电压的触电。

 

Electrify the normally uncharged metal frame and ground, resulting in electric shock of contact voltage or step voltage.

 

因此，发现电气设备、电气装置或线路及电气设备附近着火时，设法切断电源，

 

Therefore, in case of fire near electrical equipment, electrical devices or lines and electrical equipment, first try to cut off the power supply,

 

以防火势蔓延和灭火时造成触电，

 

To prevent electric shock caused by fire spreading and fire extinguishing,

 

若无法断电时，要合理使用灭火器材灭火。

 

If the power cannot be cut off, fire-fighting equipment shall be used reasonably to put out the fire.

 

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The above is a detailed introduction to the fixed lift cargo elevator. I hope it will be helpful to you If you have any questions, please contact us We will provide you with professional service