MH/T 6121-2020Aviation Fuel Operation System Emission Operation Vehicle (English PDF)

4.1 General requirements

4.1.1 Outsourcing parts and outsourcing parts should comply with the relevant standards and have the manufacturer's certificate.

4.1.2 The welding quality should meet the requirements of JB/T 5943.

4.1.3 The paint quality should meet the requirements of QC/T 484.

4.1.4 The coating and chemical treatment layer should meet the requirements of QC/T 625.

4.1.5 Finished products and parts should not have material defects, processing defects and assembly defects that affect reliability, function, appearance, and safety.

4.1.6 The rubber products in contact with fuel should have oil resistance and should meet the requirements of GB/T 5574 and HG/T 3089.

4.1.7 There should be no oil leakage, air leakage, or water leakage in the discharge vehicle.

4.1.8 Pipes, gas pipes and wires should be installed neatly and firmly fixed.

4.1.9 The emission operation vehicle should have its own operation data collection and transmission function.

4.2 Safety requirements

4.2.1 The discharge vehicle should be equipped with two dry powder fire extinguishers of not less than 8 kg, and they should be easy to take and place.

4.2.2 The bottom of the discharge truck should be equipped with static conductive floor mopping tape, and the static conductive floor mopping tape should meet the requirements of JT/T 230.

4.2.3 At least one static conductive grounding device should be installed at the place where the vehicle is easy to operate. The length of the static conductive cable should not be less than 15 m, the cable end Alligator clip on the end.

4.2.4 The resistance between any two points of the metal pipeline, any point to the end of the grounding wire, and any point of the oil tank to the end of the mopping tape the value should not be greater than 5 ohm. The resistance value at both ends of the hose assembly should not be greater than 1 Mohm.

4.2.5 The discharge operation vehicle shall be equipped with self-closing quick connector and power take-off interlocking device. When the self-closing quick connector is not reset or the power take-off is hooked when the emission operation vehicle cannot move, the yellow indicator light is on. After resetting, the interlock is released and the indicator light goes out. At the same time, it shall have the overrunning interlock function.

It can be equipped with a red indicator light.

4.3 Maneuverability

4.3.1 The external dimensions of the emission operation vehicle meet the requirements of Table 1 in GB 1589-2016.

4.3.2 The approach angle and departure angle of the discharge vehicle should not be less than 5°, and the longitudinal passing angle should not be less than 3°.

4.3.3 The minimum ground clearance of the discharge vehicle should not be less than 127 mm.

4.3.4 The discharge vehicle should be able to pass through the passage circle, and the diameter of the passage circle should not be greater than 25 m.

4.3.5 The emission vehicle should have a speed limit function and comply with airport driving regulations.

4.3.6 The braking performance of the exhaust vehicle should meet the requirements of GB 7258.

4.3.7 The minimum stable speed, acceleration performance, and sliding performance of the emission operation vehicle shall meet the design requirements.

4.3.8 In the rated loading state, the axle load of the exhaust vehicle should not be greater than the maximum design axle load of the axle. Tire carrying capacity should be the axle load of the industrial vehicle should match, the steering axle axle load should not be less than 20% of the total mass; the drive axle axle load should not be less than 25% of the total mass.

4.3.9 The emission vehicle should be equipped with at least the lamps listed in Table 1.

4.4 Environmental requirements

4.4.1 The exhaust pollutant emission limit of the emission operation vehicle should meet the requirements of GB 20891.

4.4.2 When the emission vehicle is operating under rated conditions, the noise value at the main operating surface should not exceed 90 dB (A), and the surrounding noise should not exceed 85 dB(A).

4.4.3 The noise limit outside the accelerated driving vehicle of the emission operation vehicle shall meet the regulations of GB 1495.

4.5 Stability

When the discharge vehicle is unloaded and the anti-tipping moment is 1.2 times the tipping moment, it should be able to withstand a wind speed of not less than 75 km/h. Wind speed Calculate according to formula (1) and formula (2).

4.6 Chassis

4.6.1 The emission operation vehicle should be modified with a finalized commercial vehicle chassis, and the chassis should meet the requirements of the phased emission standards.

4.6.2 The engine, exhaust pipe and battery should be equipped with protective devices to prevent fuel from dripping on them.

4.6.3 The outlet of the muffler of the engine exhaust system of the emission operation vehicle shall be equipped with a fire cap or a fire muffler. The exhaust pipe is close to the pipeline Isolation device should be installed at the place. The outlet of the exhaust pipe should be far away from the operating surface, oil tank and pump oil system. If it cannot be far away, a safety device should be installed.

4.6.4 The engine fuel supply line should not be damaged by impact and friction.

4.6.5 The air cylinder for service brake shall not be used as the air source for special equipment.

4.6.6 The performance of the power take-off should meet the operating requirements of special equipment.

4.6.7 The engagement and disengagement of the power take-off should be easy to manipulate. The power take-off control device should not interfere with other devices, affecting the driver's entry and exit Cab and operation.

4.7 Oil tank

4.7.1 The design and manufacture of oil tanks should meet the requirements of GB 18564.1.

4.7.2 The material of the oil tank should be anti-corrosion and anti-rust, or be treated with anti-corrosion and anti-rust.

4.7.3 The cross-sectional shape of the oil tank should be round trapezoid or round rectangle, with the bottom longitudinally inclined continuously to the sedimentation tank with a gradient of not less than 5%. precipitation the lowest part of the tank should be equipped with a sewage pipe and a self-resetting valve.

4.7.4 The horizontal anti-wave baffle shall be installed inside the oil tank in accordance with the requirements of GB 18564.1.

4.7.5 When working on the top of an oil tank whose height above the ground is greater than 2 m, a climbing work ladder should be set up, and a non-slip walkway for safe work should be set on the top and protective devices.

4.7.6 The outer surface of the oil tank should be smooth, free of scratches, and no obvious unevenness; the welds should be uniform and tidy; the surface straightness should conform to GB 18564.1 Requirements.

4.7.7 The welding of oil tanks shall comply with the requirements of JB/T 4734 or JB/T 4735.1, in which 10% of the circumferential welds and longitudinal welds shall be 15% of X-ray inspection results should meet the requirements of class III welds.

4.7.8 If the oil tank is kept under a static pressure of 36 kPa for 30 minutes, there should be no leakage or permanent deformation.

4.7.9 The rated capacity of the oil tank shall comply with the design specification. The remaining oil volume should not be less than 1% of the rated capacity. Expansion capacity should not be less than the amount 3% of the fixed capacity.

4.7.10 A manhole with a diameter of not less than 500 mm shall be provided on the top of the oil tank. The manhole cover should be provided with an observation port cover and a breathing valve, and the breathing valve should have it has flame retardant and dumping and overflow prevention functions, and the ventilation volume should meet the requirements of the maximum flow rate of oil loading and oil discharge.

4.7.11 A level gauge shall be provided, and the indication error of the level gauge shall not exceed 5%.

4.7.12 The oil tank should be equipped with a high level control device with self-checking function, and the safety capacity should be marked.

4.7.13 When the oil tank is installed, the offset between the longitudinal center plane of the oil tank and the longitudinal center plane of the vehicle chassis shall not exceed 6 mm.

4.8 Electrical system

4.8.1 The battery should be equipped with a main power switch.

4.8.2 The special equipment circuit should be powered from the chassis and be equipped with a fuse, and a special connection port should be set; a two-wire system should be adopted, and the grounding point should be set Inside the junction box; the exposed wires should be installed or covered with oil-resistant, flame-retardant and anti-aging protective tubes.

4.8.3 The circuit contacts should be firm and well insulated.

4.8.4 The emission vehicle should be installed in a prominent position with a C-type low-intensity aviation obstruction light that complies with MH/T 6012.

4.8.5 Lighting lamps should be installed on the operation surface to ensure normal operation and monitoring at night.

4.8.6 The emission vehicle should be equipped with a reversing image system.

4.9 Hydraulic system

4.9.1 The hydraulic system should meet the requirements of GB/T 7935 and GB/T 3766.

4.9.2 A hydraulic system pressure gauge shall be installed at the outlet of the hydraulic pump of the hydraulic system.

Set up warning signs.

4.9.4 The hydraulic system should be equipped with exhaust devices.

4.9.5 The hydraulic oil tank should be equipped with a level gauge, clearly indicating the maximum and minimum level lines, and equipped with a filter device.

4.10 High and low point discharge system of pipe network

4.10.1 The high and low point discharge system of the pipe network should be able to discharge high points and low points to discharge water and impurities.

4.10.2 Two discharge inspection pipelines should be set up, one way passes through the filter ball valve and returns to the oil tank after being measured by the flow meter; the other way is taken through a closed circuit.

The sampler enters the oil collecting tank, and the installation position of the closed-circuit sampler should be convenient for operators to use.

4.10.3 The pipes or accessories shall be made of stainless steel, aluminum alloy, and the inner surface layer shall be protected by hot-tinning or sprayed.

Made of carbon steel with compatible epoxy resin.

4.10.4 The high and low point discharge system should work normally under the rated working pressure of the pipe network, and should not be under the condition of 1.25 times the rated working pressure of the pipe network.

Damage, malfunction and leakage occurred.

4.10.5 A discharge port shall be provided at the lowest point of the pipeline.

4.10.6 There should be an oil collecting tank that is easy to clean. The oil collecting tank has a liquid level display function and has an oil drain with a self-resetting valve at the bottom. Oil collecting tank the medium fuel oil should be able to be pumped back into the tank.

4.10.7 The mesh number of the filter screen of the filter ball valve should not be less than 40 meshes, which can be quickly disassembled and assembled to facilitate the inspection of oil impurities on the filter screen.

4.10.8 The flowmeter should be suitable for aviation fuel, with single measurement and cumulative measurement functions.

4.10.9 The hose reel shall be able to neatly wind up the length of hose used. The hose can be retracted freely, can stay in the required position at will, the hose is pulled There should be a protective device at the outlet. A hose reel brake device should be installed to prevent the reel from rotating when the vehicle is running.

4.10.10 The hose should be an electrostatic conductive hose that meets the requirements of GB/T 10543 or ISO 1825, and the pressure level meets the design requirements.

4.10.11 A self-closing quick connector should be installed at the end of the hose.

4.11 Pump oil system

4.11.1 The oil pump system should have the following main functions.

a) It can be used as a mobile pump station for fuel delivery operations;

b) The external fuel can be pumped into the tank of the vehicle, and the refueling operation can be completed quickly when the refueling vehicle, fuel equipment, etc. are repaired;

c) The fuel in the tank can be pumped out.

4.11.2 Piping or accessories shall meet the requirements of 4.10.3.

4.11.3 The pump oil system should work normally under the condition of the rated working pressure of the pump, and should not be damaged or damaged under the condition of 1.25 times the rated working pressure of the pump.

Failure and leakage.

4.11.4 A discharge port shall be provided at the lowest point of the pipeline.

4.11.5 A filter device of no less than 40 mesh should be installed on the pump inlet pipeline to facilitate disassembly.

4.11.6 The hose should be an electrostatic conductive hose that meets the requirements of GB/T 10543 or ISO 1825, and the pressure level meets the design requirements. If adopted the reel should meet the requirements of 4.10.9.

4.11.7 The performance parameters of the pump should meet the design requirements.

4.12 Control devices and instruments

4.12.1 The various functions of the emission vehicle should be individually controlled.

4.12.2 Each control device should be safe and reliable, and flexible in operation.

4.12.3 There should be a remote engine throttle to adjust the engine speed.

4.12.4 The dashboard should be set up on the operating surface where it is easy to observe. The instrument calibration connector and operation process signs should be installed on the dashboard.

4.13 Maintainability

The disassembly and assembly of parts and components of the emission operation vehicle should be simple, and it should have good accessibility during inspection and maintenance.

4.14 Environmental adaptability

In the rated loading state, the exhaust truck should be able to work normally under the ambient temperature of -40 °C ~ 60 °C.

4.15 Reliability

4.15.1 Driving reliability

The emission operating vehicle has a driving mileage of 3 000 km (driving on a good road), and no fatal failure should occur during driving.

4.15.2 Operational reliability

The inherent effectiveness of the emission vehicle operation should not be less than 0.8.

5.1 General requirements inspection

5.1.1 Visual inspection

Visually inspect items 4.1.1, 4.1.5 to 4.1.9.

5.1.2 Inspection of structural weldments

Check according to JB/T 5943.

5.1.3 Paint coating inspection

Check according to QC/T 484.

5.1.4 Inspection of coated and chemically treated parts

Check according to QC/T 625 regulations.

5.2 Safety performance check

5.2.1 General project inspection

Visually inspect items from 4.2.1 to 4.2.3.

5.2.2 Checking the resistance of the static electricity path

Use a multimeter to check the resistance of the static electricity path.

5.2.3 Interlock check

Operate the self-closing quick connector and power take-off interlocking device correctly according to the requirements of the operation manual of the emission operation vehicle, and check its function.

5.3 Maneuverability inspection

5.3.1 Measurement of vehicle size parameters

According to GB/T 12673 method, measure the outline size of the emission operation vehicle.

5.3.2 Passability inspection

Measure the approach angle, departure angle and longitudinal passing angle of the emission vehicle according to the method of GB/T 12673.

5.3.3 Minimum ground clearance measurement

Measure the minimum ground clearance of emission vehicles in accordance with the method of GB/T 12673.

5.3.4 Measurement of the outer diameter of the channel circle

Measure the outer diameter of the channel circle of the emission vehicle according to the method of GB 1589-2016.

5.3.5 Maximum speed inspection

The maximum vehicle speed is measured according to the provisions of GB/T 12544.

5.3.6 Braking performance inspection

Carry out brake inspection according to GB 7258.

5.3.7 Minimum stable vehicle speed inspection

The minimum stable vehicle speed is measured according to the regulations of GB/T 12547.

5.3.8 Accelerated performance inspection

Test the acceleration performance according to GB/T 12543.

5.3.9 Coasting test

Carry out the sliding performance test in accordance with the provisions of GB/T 12536.

5.3.10 Whole vehicle quality parameter measurement

According to GB/T 12674, the total vehicle mass, front axle load mass, and rear axle load mass of the whole vehicle are measured in the ready state and the full load state.

5.3.11 Inspection of external lighting and light signal devices

Check the external lighting and light signal devices according to Table 1.

5.4 Environmental protection requirements inspection

5.4.1 Measurement of exhaust pollutant emissions

For commercial chassis, the manufacturer provides an emission certificate.

5.4.2 Operational noise measurement

The measured working condition is the self-circulating operation of the rated flow of the pump oil system.

The measurement position is 4.6 m around the emission vehicle, and the measurement position is 1.5 m above the ground.

5.4.3 Noise measurement outside accelerating vehicles

According to the provisions of GB 1495.

5.5 Stability test

The discharge vehicle is parked on a solid level ground, and the side area of the windward parts of the vehicle and the height of the side centroid from the ground are measured to calculate the overturning force Moment and anti-overturning moment.

5.6 Chassis inspection

5.6.1 General project inspection

Visually inspect items 4.6.1 to 4.6.5.

5.6.2 Power take-off inspection

Check the working condition of the power take-off when each system is operating under the maximum load condition.

5.7 Oil tank inspection

5.7.1 General project inspection

Visually or review the technical documents to check items from 4.7.1 to 4.7.7 and 4.7.10.

5.7.2 Oil tank installation alignment inspection

The discharge vehicle is placed on a horizontal ground, and the lower midpoint of the front cross section of the oil tank, the lower midpoint of the rear cross section and the the distance between the center points of the frame is measured 3 times.

5.7.3 Oil tank static pressure test

Before painting the oil tank, close all the vent holes on the oil tank and inflate the tank. When the pressure in the tank rises to 36 kPa, all welds and through holes Apply soapy water to the seal, keep the pressure for 30 minutes, measure the straightness to determine whether there is deformation and check for leakage or pressure drop.

5.7.4 Measurement of oil tank capacity parameters

5.7.4.1 Measuring the total capacity of the oil tank

Under the condition that the oil tank is empty, the discharge vehicle is placed on a flat field, the bottom valve of the oil tank is closed, and the oil tank is filled with fuel through the measuring instrument when the tank is full, the measured value is the total capacity of the tank.

5.7.4.2 Measurement of remaining oil in oil tank

The oil in the tank is pumped to other containers through the pump oil system of the vehicle until it cannot be pumped out (that is, the tank oil level reaches the lowest level). turn on the oil discharge valve at the bottom of the oil tank, the amount of oi...