Accidental damage to
diesel generator set oil pipes is a high-frequency problem in equipment maintenance. If not handled properly, it may cause fuel leakage, lubrication failure and even fire risks. This article combines technical specifications and practical experience to analyze the damage handling process, emergency measures and prevention strategies of different oil pipes (fuel pipes, oil pipes, coolant pipes).
1. Overview of oil pipe damage types and risks
Diesel generator oil pipe damage mainly involves fuel pipes, oil pipes and coolant pipes, and their risk levels and direct consequences vary:
1. Fuel pipe damage: usually caused by aging, vibration or external impact, with a high risk level, which may cause fuel leakage, engine flameout and even fire.
2. Oil pipe damage: mostly caused by high-pressure burst or loose joints, with the second highest risk level, which may cause a sudden drop in oil pressure and engine cylinder pull.
3. Coolant pipe damage: common causes include corrosion, frost cracking or seal failure, with a relatively low risk level, but may cause engine high temperature and cylinder deformation.
2. Emergency treatment "three-step method"
1. Immediate power off and isolation
Shut down the engine: quickly cut off the main power switch to prevent electric sparks from igniting the leaked fuel.
Close the valve:
Fuel pipe: immediately close the fuel tank outlet valve and the fuel injection pump supply valve.
Oil pipe: close the oil pump inlet and outlet valves (if the unit is equipped).
Coolant pipe: close the water tank replenishment valve and the engine inlet and outlet ball valves.
2. Leakage control and cleaning
Fuel leakage: use absorbent materials such as oil-absorbing cotton and sand to absorb the leaked diesel. It is strictly forbidden to use water to flush to avoid expanding the scope of pollution. At the same time, turn on the exhaust fan for ventilation and detect the concentration of combustible gas on site to ensure safety.
Oil/coolant leakage: clean the leaked oil or coolant with a rag or special absorbent. The waste liquid must be recycled according to the hazardous waste treatment specifications.
3. Temporary repair and transfer
Fuel pipe: Use a special leak plugging fixture or wrap raw tape and add a hose clamp for temporary plugging. If the damage is serious, the oil pipe can be cut off and a bamboo stick or wooden wedge can be inserted, and the outer tape can be fixed.
Engine oil pipe: When the high-pressure oil pipe is broken, it is strictly forbidden to use tape to repair it, and it should be replaced immediately. Low-pressure oil pipes can be temporarily reinforced with oil-resistant rubber sheets and pipe clamps.
Coolant pipe: PVC pipes can be wrapped with waterproof tape, and metal pipes need to be connected with quick connectors.
III. Permanent repair plan
1. Fuel pipe repair
Replacement standard: Rubber pipes must be replaced every 2 years, and metal pipes must also be replaced if the damaged area exceeds 30%.
Installation points: 2%-3% slack should be reserved for new pipes to avoid breakage caused by thermal expansion and contraction. Thread sealant should be applied to the joints and tightened according to the torque value specified in the maintenance manual (such as M14 joints need to be tightened to 50N·m).
2. Engine oil pipe repair
High-pressure oil pipe: It must be replaced with original accessories, and welding repair is prohibited.
Low-pressure oil pipe: Stainless steel bellows can be used instead of rubber pipes to improve the pressure resistance level.
3. Coolant pipe repair
Metal pipe: Argon arc welding can be used for repair welding, and a pressure test of 1.5 times the working pressure is required after welding.
Rubber pipe: When replacing, materials that are resistant to high temperature (≥120℃) and corrosion (ethylene glycol type coolant) should be selected.
Conclusion
The damage of the oil pipe of the diesel generator set must follow the three-level response mechanism of "emergency-repair-prevention". Through scientific material selection, standardized installation and intelligent monitoring, the failure rate of the oil pipe can be reduced by more than 80%. It is recommended that enterprises conduct special inspections of the oil system every year and train operators to master leak plugging skills to ensure that the emergency power supply can operate stably with "zero leakage and zero accidents".
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