Introduction of Working Principle and Structure of Oil Tanker Trailer
The oil tanker semi trailer structure is elliptic cylinder or trapezoidal surface column shape, made of high quality steel plate, the whole tank is divided into single warehouse, warehouse can be divided into the room, the lower end of the middle clapboard has a through hole, each warehouse middle welding warehouse to strengthen the anti-wave clapboard, to reduce the impact of oil in the tank when the car drove and improve the stiffness of the tank.
Preparations before use: insert the conductive rod into the ground to make it “grounded”. If the ground is dry, water it to make it wet to ensure good grounding. Check the ground chain, make it contact with the ground, open the oil tanker control box door, check each valve handle, make it in the closed state (vertical position)
1. Oil tank body of oil tanker
The oil tank structure is elliptic cylinder or trapezoidal cylinder, etc., made of high quality steel plate, the whole tank is divided into single or more warehouses, the middle of the clapboard has a through hole, each warehouse middle welding to strengthen the anti-wave clapboard, in order to reduce the impact of oil in the tank and improve the stiffness of the tank. In order to prevent corrosion, the exterior of the tank is coated with anti-rust paint and decorative paint.
2. petroleum tank trailers mouth assembly
Oubiao opening is usually installed on top of a petroleum tank truck body, the material of aluminum alloy and stainless steel, has a built-in can breath and emergency vent line, and it can be installed on the manhole cover gas collection valve, oil hole, prevent overflow sheath maerial, built-in breathing valve makes the internal pressure in the process of transporting oil tanker truck remain stable, and the external pressure balance, The design of dumping and placement overflow enables the tanker to keep the seal in case of accidents. The emergency exhaust device will automatically open to release the pressure in the tank when the pressure in the tank sharply increases, thus preventing accidents and greatly improving the safety of oil transportation.
Oubiao jar above, aluminum alloy, Yi said manhole covers, installed on the tank top, with functions of built-in breathing valve and emergency vent, and oil and gas recovery valve installed in the manhole cover, oil hole, prevent overflow sheath maerial, etc., prevent the overflow sensor system in the process of loading, when the liquid level to detect position sensing system will automatically alarm, so as to stop loading. Built-in breathing valve made in the process of oil tank internal pressure stable, and the external pressure balance, the dumping of prevent overflow design make the tanker keep sealed in the case of an accident, emergency exhaust system in the case of a tremendous rise of pressure tank, will open automatically, release the pressure of the fuel tank, to prevent the accident, greatly improving the security of oil shipments.
3. tanker seabed valve (emergency cut-off valve)
Bottom valve installed on the bottom of the tank car tanks tanks, pneumatic and manual two kinds, general is given priority to with pneumatic, material of aluminum alloy and stainless steel, can be to refuel in the bottoms, the valve internal pressure is small, large flow, the valve flange has cut slot, accident in oil tank, due to the large fault trough in the unbearable momentum, car body line with tanks will automatically disconnect, The automatic center plunger and durable spring will remain sealed and the tank medium will not leak, thus ensuring the safety of the tank.
In order to ensure that the valve has good working ability, the following conditions must be met:
A. When the subsea valve is working, the pressure of the system air source must be > 0.4mpa.
B. The valve body and the middle plunger must be highly sealed.
C, the spring must maintain enough elastic reset.
Static electricity is likely to occur when LPG flows at high speed from nozzles, nozzles or damaged areas.The ground wire of the tank tail and valve box should be grounded in time when diluting and suppressing explosion in medium discharge dangerous group.
The danger of venting refers to when tank trucks leak LPG and cannot be treated, use water spray to dilute the leaking LPG when cooling the body of the water tank, wait for the liquid in the tank to drain naturally, and take preventive measures before empelling and risk mitigation measures.According to the geographical location and wind direction to determine the scope of the danger zone;
Fire source should be controlled in the warning area;Gas phase discharge and discharge flow rate should be controlled;Downwind direction should be set up water curtain for water dilution;Such as impact, friction, overturn and other accidents, if the inflatable liquid valve or the valve box in the pipeline breaks and leaks, the emergency measure is to stop the leakage by closing the emergency shutoff valve.