The country’s requirements for dangerous goods transport vehicles are very strict, but accidents involving oil tankers’ fires still occur from time to time. What if the tanker fires during the transportation of oil? The tanker driver must master some methods of fire fighting, and it is most likely to ensure safe driving. If the tanker fires, the first aid method is as follows:
1. If the tanker is on fire while driving and you are unable to extinguish the fire, stop the vehicle to the right as soon as possible and call the police to request rescue.
2. Before the fire truck comes, we must first find a way to self-rescue. For example, you can use a quilt, fire blanket or a fire extinguisher carried with the vehicle to fire the fire source, or use other covers to block the tank. Extinguish the oil fire.
3. If the oil tanker cracks due to high temperature and the oil leaks out, as a driver of the tank truck, you can use the adjacent drainage ditch or dit the trench yourself to let the leaked oil flow into the ditch to burn and control the fire and avoid extend.
4. No matter where the fire occurs in the tank truck, as the driver of the tank truck, the oil remaining on the ground or in the drainage ditch must be properly disposed of, and the oil material should be buried to avoid re-ignition.
5. If the fire is not easy to control after the fire of the tanker, there is a tendency to blast, and the site personnel should immediately evacuate and evacuate to safety.
6. When the tanker fires, quickly close the tank lid of the tanker, close the unloading valve, and use a dry powder fire extinguisher to extinguish the fire. If the appliance is on fire, it must be powered off first, and use a dry powder fire extinguisher to extinguish the fire. .
In order to prevent the tanker from catching fire, we must have preventive measures: whether it is a fuel truck or a tanker, it must be equipped with a special fire extinguisher, and it must be equipped with an electrostatic belt and a static pole for mopping the ground. When the belt must be mopped, when refueling or draining, the electric rod must be inserted into the damp ground. The oil hole of the tank should be tightly sealed. The drain valve and the drain pipe should be free of leakage. The tank vent should be unblocked. The oil filter should be cleaned frequently. After the oil supply hose is used up, it should be connected with the joint cover at both ends of the fashion. No dirt should enter. When the vehicle is parked, keep away from the fire source. In the summer, you should choose to park in a cool place. The thunderstorm weather should not be parked in the big tree. Or under high voltage power lines.
These safety measures must be in place to reduce the probability of fire in tank trucks and to drive safely.
Refueling truck / tanker / tanker national unified sales hotline: 15897617666 (WeChat same number)
Generally have two kinds of structure: first half open, is composed of a rear cover plate and blades, the structure, the efficiency of the Impeller lower, in order to improve the efficiency to be matched with a seal ring which can adjust clearance; another half open, is composed of a front cover plate and blades. The application and closed the same impeller sealing ring, efficiency and closed impeller is basically the same as the blades, and in addition to transport liquid, also has back blade or vice impeller seal. The semi open impeller is suitable for conveying liquid containing solid particles, fibers, etc.. Semi open impeller manufacturing is difficult, low cost, and adaptability, in the oil refining and chemical industry with a gradual increase in the application of centrifugal pump, and for the transport of water and water approximation of the liquid.
Photo of our Impeller:
Open impeller
Only blades and blades to strengthen the reinforcement, no front and back cover of the impeller (open impeller blade number less 2-5). Impeller efficiency is low, the application is less, mainly used for conveying high viscosity liquid, as well as slurry liquid.
Blade of centrifugal pump impeller is generally backward curved blade. There are two kinds of cylindrical and twisted, the application of twisted blades can reduce the load of the blade, and can improve the suction performance of centrifugal pump, improve the anti cavitation ability, but the manufacture is difficult, the cost is higher.
Centrifugal pump for oil refining and chemical industry requires impeller for casting or whole welding seam welding of the integral impeller. Special centrifugal pumps for chemical use in the manufacture of metal materials (such as iron and its alloys), which are used in the manufacture of poor performance, such as iron and its alloys. The geometric accuracy and surface finish of the welded impeller are superior to the casting impeller, which is beneficial to the improvement of the efficiency of the centrifugal pump.
Shape classification
The shape of the blade centrifugal fan impeller has several single plate, arc type and wing type etc.. Airfoil blade has good aerodynamic characteristics, high efficiency, good strength and stiffness. The disadvantage is that the manufacturing process is complex, and when the transmission of high dust concentration of the gas, the blade is easy to wear, blade wear, the impurities into the blade, so that the impeller lost balance and vibration. The flat straight blade is simple, but the flow characteristics are poor, and the efficiency is quite close to the efficiency of the other working conditions when the flat curve is compared with the airfoil blade, and the efficiency is lower than the highest efficiency point.
Forward impeller
The front impeller generally adopts circular arc blade, and the rear direction impeller, the large fan adopts the airfoil blade, and the wind turbine of the coal fired boiler with low dust removal efficiency can adopt the circular arc type or the flat plate type blade. The centrifugal fan with flat blade is more.
(a) flat blade; (b) arc narrow blade; (c) arc blade; (d) wing blade; (E) flat curve back to blade
Compression impeller
Working round. The only component of the air flow in a centrifugal compressor. The most important parts on the rotor. Generally by the wheel, wheel cover and blade and other parts of the composition. Under the action of the impeller blades, the rotating speed of the leaf rotation, the gas is affected by the centrifugal force of the rotation, as well as in the impeller of the diffuser flow, so that it can be improved through the pressure of the impeller.
Requirements for impeller
(1) can be given a larger energy; (2) gas flows through the impeller loss should be small, namely the gas flows through the impeller efficiency to be high; (3) gas outflow impeller parameters when appropriate, the gas flowing behind the fixing element flow loss is smaller; (4) type of impeller can make or overall performance curves of the stable operating region and the efficiency range is wide. Normally divided into closed, semi open and open type impeller.
The impeller is composed of a wheel hub and a blade in a wind turbine. The wind passes through the impeller, drives the impeller to rotate, which drives the generator to rotate, and the wind energy is converted into electric energy. At this time, the rotating impeller with large enough on the windward side, to extract enough energy from the wind; at the same time, when the wind speed is too large, can automatically adjust the blade windward angle to avoid due to the stress and mechanical damage.
Impeller material
Cast iron, bronze, stainless steel, manganese bronze, Monel alloy, INCONEL, and non metal materials.
Non metallic materials
PPS plastic, phenolic resin, etc..
Impeller
Boat Impeller,Centrifugal Impeller,Marine Impeller,Water Pump Impeller
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