Talking about the performance characteristics and maintenance of the high-rise fire-fighting vehicle. 1. The characteristics and performance of the high-lifting car In recent years, with the rapid development of the national economy, high-rise buildings have sprung up everywhere. In order to meet the need to save high-rise fires, the number of lift trucks has been increasing, playing an active role in the fight against fire. However, due to the relatively complicated structure of the lift car, the operation requirements are relatively high, and if the operation is improperly used, it is easy to cause an accident. On May 18th, 2009, the second squadron of the Changsha detachment of the Hunan detachment in the process of detecting a 52-meter curved arm ascending the vehicle, due to the failure of the vehicle, the work bucket was overturned, resulting in a manufacturer’s technology in the bucket. A total of 3 people and two soldiers fell from a height of 30 meters and died after being rescued. On the morning of November 22, 2005, the Fusong County squadron of the Baishan City Fire Brigade of Jilin Province organized a warrior to carry out the training of the arm-armed climber in the camp. As the boom of the climber suddenly bends, the bucket accelerates and falls, and a soldier is taken from Ascending the platform to the ground, causing the soldier to stun on the spot, the Fusong County Hospital was completely rescued, and unfortunately sacrificed. These two train-lifting operation accidents brought endless pain to the families of the deceased and seriously affected the normal work of the troops.
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The analysis of two high-lift train operation accidents in other provinces is very profound. In order to absorb the blood experience, the author combines the vehicle management work he has been engaged in in recent years, and has carried out a superficial study on the performance characteristics, use precautions and maintenance of the lift car, and is willing to discuss with the comrades.
First, the characteristics and performance of the lift car
A lift fire truck is a fire truck equipped with a support system, a rotary disc, a lifting boom and a fire extinguishing device, which can perform fire fighting and rescue. Generally, according to the difference in the structure of the lift fire truck boom system and the difference in use, It is divided into three types: ladder ladder fire truck, ascending platform fire truck and lift high jet fire truck. The development of high-rise fire trucks has a history of more than 100 years. In recent years, with the need of actual combat and the advancement of manufacturing technology, a straight-curved arm ascending vehicle with a bendable forearm at the front end of the ladder truck was derived. The side of the boom is equipped with a ladder, a high-injection fire truck is attached to the working platform, and a large-scale high-rise fire truck is equipped with a water tank, a fire pump and other composite lift trucks, which play a greater role in fire fighting and rescue. The role.
(1) The ladder ladder fire truck adopts the telescopic boom structure, which has the advantages of light weight, quick action, easy operation and direct reach. The German Malkilus ladder fire truck is taken as an example. Its 55-meter straight-arm ladder fire truck The total weight is only about 22 tons. The ladder stretches from the driving position to the maximum length and the maximum working height and rotates 90 degrees. The working time to reach the maximum rescue range is only about 85 seconds. The height of the landing platform fire truck (54 meters ascending platform truck) with a working height of 36 tons, the extension time of the same operation takes 130 seconds. The shortcoming is that the working height is relatively low, the platform load is low, the maximum deployment angle of the working arm is low (75 degrees), and the current maximum height of the ladder fire truck is 56 meters. Due to the limitation of manufacturing process, the height is difficult to have a larger breakthrough. The second is that the ladder ladder fire truck is to reduce the weight of the telescopic arm of the vehicle, and some of the fixed pipelines are used (that is, the uppermost section of the ladder is installed with water pipes, and the water belt is connected through the fixed pipeline before the fire extinguishing operation). The platform is relatively small, and can accommodate 2 People (270-320 kg), water cannon flow is relatively low (1800-3800 l / min).
(2) Ascending platform fire trucks, also known as hydraulic lift trucks, are also known as curved arm vehicles due to their use of curved arm structures. In the 1990s, with the advancement of manufacturing processes, there were also straight arm telescopic boom structures, which were characterized by maneuverability and flexibility. The work is stable, the work span is large, the scope is wide, the working platform area is large, and the working platform has a relatively high bearing capacity, which is convenient for carrying out fire fighting and rescue work and even saving valuable materials. Its working platform can be used in conjunction with a descender, hydraulic winch or life-saving slide to achieve fire protection while saving people. The maximum deployment angle of the working arm is 85 degrees and the working height is high. At present, the world's highest climbing platform is 104 meters. The large rescue platform can carry 5 people (500 kg). Due to its large working platform, its integrated waterway And the fixed water cannon system can immediately put into the fire fighting capability, the water cannon flow is large (2300-6000 liters / min).
(3) The high-injection fire-fighting vehicle is commonly called high-spraying vehicle. It adopts a curved arm structure and is equipped with a fire cannon at the top. Its liquid-controlled cannon can spray water or spray foam. It has a long range and large flow, and can easily occupy high altitude. Lower spray fire extinguishing agent. Because of the large consumption of fire extinguishing agents, modern high-spraying vehicles are generally equipped with water tanks, fire pumps and vacuum water pumps, which can be used separately in the case of surface water sources. When there is no water source, they must be used with large water supply vehicles or foam vehicles. Ensure uninterrupted water injection of high-spray cars. In recent years, the high-injection fire-fighting vehicles have been developed into a multi-functional development. For example, a puncture-type sprinkler is installed at the top of the boom, and the hydraulic cylinder is powered by a remote control device to actuate the demolition apparatus to damage glass windows, plywood, and even brick-concrete buildings. The roof allows the water flow to be sprayed directly into the room and other functions.
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