In cold weather, low temperatures can significantly impact the mechanical performance, hydraulic system, electrical equipment, and operator safety of rotary drilling rigs. To ensure stable operation of rotary drilling rigs in winter or frigid regions, reduce the failure rate, and guarantee construction safety and progress, Shandong Liqiang Machinery reminds you of the following precautions:#pile driver for sale#
I. Before Operation: Thorough Preparation and Elimination of Potential Hazards
Pre-operation checks and preparations are fundamental to safe operation of rotary drilling rigs in cold weather, effectively preventing mechanical failures caused by low temperatures.
Equipment Preheating: Gradual Temperature Increase to Avoid Damage
Before starting the engine, check the antifreeze level and concentration to ensure it meets the local minimum temperature requirements (generally, the antifreeze freezing point should be 5-10°C lower than the local minimum temperature) to prevent the radiator from freezing and cracking.
Start the engine using a "segmented preheating" method: First, turn the ignition switch to the preheating position. After the preheating indicator light goes out (approximately 30-60 seconds, refer to the equipment manual for specific times), attempt to start the engine. If it fails to start on the first attempt, wait 1-2 minutes before trying again to prevent frequent starting from draining the battery.
After starting the engine, do not accelerate immediately. Maintain idle speed for 5-10 minutes (up to 15 minutes in low-temperature environments). Once the coolant temperature reaches above 40°C and the oil pressure stabilizes, then perform low-speed operation and test runs to allow the hydraulic and transmission systems to gradually warm up.
Mechanical component inspection: Pay special attention to parts prone to freezing and wear.
Hydraulic oil check: Confirm that the hydraulic oil level is normal and that the oil type meets low-temperature requirements (in winter, it is recommended to use low-temperature anti-wear hydraulic oil, such as L-HM46 or L-HM32; refer to the equipment manual for details) to prevent increased oil viscosity from causing hydraulic system jamming.#pile driver for sale#
**Fuel System Check:** Use diesel fuel that meets low-temperature standards. Check the fuel filter for blockages; replace it promptly if impurities are found to prevent wax buildup and clogging of the fuel lines.
**Battery Check:** Low temperatures reduce battery capacity. Check battery terminals for looseness or oxidation. Also check the battery charge and charge if necessary to ensure sufficient power for starting.
**Tires and Tracks Check:** For wheeled rotary drilling rigs, check tire pressure (tire pressure will decrease in low temperatures; inflate to the standard range) to prevent tire deformation due to low pressure. For tracked rotary drilling rigs, check track tension and track shoe bolts to prevent loose tracks or loose bolts.
**Operator Preparation:** Ensure adequate warmth and safety protection.
Operators must wear warm, non-slip protective gear, such as cold-weather clothing, non-slip gloves, and non-slip safety shoes, to prevent accidents caused by stiff hands or slipping feet due to cold.
**Operator Preparation:** Ensure proper warmth and safety protection.
Operators must wear warm, non-slip protective gear, such as cold-weather clothing, non-slip gloves, and non-slip safety shoes. Before operation, familiarize yourself with the construction site environment, checking for ice or snow. If present, clear it beforehand to prevent the rotary drilling rig from slipping during travel or operation. Also, ensure there are no obstacles within the construction area to guarantee a safe working space.
II. During Operation: Standardized Operation and Real-Time Equipment Monitoring
When operating a rotary drilling rig in cold weather, strictly adhere to the standardized operating procedures, monitor the equipment's operating status in real time, and promptly address any abnormalities.
Operating Procedures: Smooth Operation, Avoid Overloading
In the initial stages of operation, avoid immediately performing high-intensity, high-load actions (such as rapid drilling or heavy lifting). Begin with low-speed, low-load trial operations to allow the hydraulic system and engine to gradually adapt to the increased workload, preventing damage due to decreased component toughness at low temperatures.
During drilling, control the drilling speed and pressure, adjusting the drilling pressure according to geological conditions to avoid drill rod jamming or engine overload caused by excessive drilling speed. When encountering hard soil or frozen soil layers, use a "slow drilling, multiple breaking" method; do not force drilling to prevent drill rod bending or breakage.
When raising the drill bucket, the speed should be steady, avoiding sudden acceleration or deceleration to prevent excessive bucket swaying due to inertia, which could lead to collisions with the machine body or surrounding objects. Simultaneously, observe the condition of the excavated material inside the bucket. If excavated material freezes inside, remove it promptly to avoid increasing the equipment load.
Equipment Monitoring: Focus on Temperature and Pressure Indicators
Continuously monitor the engine coolant temperature, engine oil temperature, and hydraulic oil temperature on the instrument panel. Ensure the coolant temperature is maintained between 80-90℃, and the engine oil and hydraulic oil temperatures are maintained between 40-80℃. If the temperature is too low, appropriately increase the engine speed or reduce the operating load to allow the temperature to rise gradually. If the temperature is too high, stop operation immediately, check for blockages in the cooling system, and troubleshoot before continuing operation.
Monitor the engine oil pressure and hydraulic oil pressure to ensure they are within the normal range. If the pressure is abnormal (too high or too low), stop the machine immediately for inspection. This may be due to abnormal oil viscosity, clogged filters, or leaks in the pipelines. Do not operate with faulty components to prevent damage to the hydraulic pump, engine, and other core components.
Listen carefully to the operating sounds of the equipment. If any abnormal noises (such as harsh friction sounds or dull knocking sounds) are heard from the engine, hydraulic pump, reducer, or other components, stop the machine immediately for inspection. Check for wear, insufficient lubrication, or obstruction by foreign objects. Repair the problem promptly before resuming operation.
Site Management: Clean up promptly to ensure a safe working environment.
If new ice or snow forms on the site during operation, suspend work and clear it promptly before continuing to prevent the rotary drilling rig's tracks or tires from slipping. Use de-icing agents (avoid those that corrode the equipment) or a loader to assist in clearing, ensuring the site is flat and free of slippery spots.#pile driver for sale#
If the operating site is windy (e.g., during strong winter winds), monitor the stability of the rotary drilling rig. Avoid operating at heights or near slopes to prevent tilting due to wind. Also, check the verticality of the drill rod. If the drill rod sways excessively, lower the operating height to ensure drilling accuracy and equipment safety.
III. Post-Operation Maintenance: Thorough Maintenance for Future Operations
After operations in cold weather, a comprehensive maintenance and upkeep of the rotary drilling rig is necessary to prevent freezing damage or malfunctions due to the low temperatures.
Equipment Cooling and Cleaning: Orderly Operation to Avoid Component Damage
After operation, do not immediately shut off the engine. Allow it to idle for 5-10 minutes to gradually cool the engine and hydraulic system, preventing uneven component contraction due to sudden temperature drops, which can affect service life. Only shut off the engine after the water temperature has dropped below 60℃ and the engine oil temperature below 50℃.
Clean the equipment surface of accumulated snow, ice, and debris, especially the hydraulic lines, radiator fins, and battery terminals. Thoroughly clean these areas to prevent melted snow from seeping into components and causing corrosion, or freezing and cracking the lines. Also, clean the mud from the drill bucket and drill rod. If the mud is frozen, melt it with hot water (not too hot to avoid excessive temperature differences that could deform components) before cleaning.
Fuel and Hydraulic System Maintenance: Preventing Freezing and Blockage
If the equipment needs to be parked for an extended period (more than 12 hours), fill the fuel tank with diesel fuel to reduce the air volume inside the tank and prevent moisture in the air from condensing into ice and blocking the fuel lines. Simultaneously, add an appropriate amount of diesel anti-gelling agent to the fuel (follow the fuel type and anti-gelling agent instructions) to lower the diesel fuel's pour point and prevent wax formation.
Check the hydraulic lines for leaks. If leaks are found, repair them immediately. If the ambient temperature is below -10℃ and the parking time exceeds 24 hours, it is recommended to partially drain the hydraulic oil from the hydraulic system, or start the engine and let it idle for 10-15 minutes to allow the hydraulic oil to circulate, preventing the oil from freezing and causing the lines to rupture.
Parking Management: Choosing a Suitable Site and Taking Protective Measures#pile driver for sale#
Park the rotary drilling rig in a flat, dry, and sheltered area. Avoid parking in low-lying areas or areas with standing water to prevent water from freezing and sealing the tires or tracks. If the site is sloped, wed the tires or tracks with wedges to prevent the equipment from sliding.
Retract the drill rod and drill bit, placing the drill bit on the ground to prevent the drill rod from suspending in the air for extended periods and to reduce stress on it. Simultaneously, turn off all electrical switches on the equipment, remove the key, and check that doors and windows are properly closed to prevent rain or snow from entering the cab and damaging the interior or electrical equipment.
If the equipment will be parked for more than 3 days, start the engine once a day and let it idle for 15-20 minutes to circulate the engine oil and hydraulic fluid, preventing them from deteriorating or freezing. Also, check the battery charge and charge it if necessary to ensure normal starting next time.
IV. Emergency Handling: Rapid Response, Minimizing the Impact of Failures
When operating in cold weather, if equipment failure or safety hazards occur, take immediate emergency measures to prevent the problem from escalating.
Engine Fails to Start: Troubleshoot and Address the Issue Targetedly
If the engine does not respond when starting, it may be due to insufficient battery power or loose battery terminals. Check that the battery terminals are secure; tighten them if loose. If the battery power is insufficient, use an emergency jump starter or replace the battery with a fully charged one.
If the engine runs but fails to ignite during startup, it may be due to wax buildup in the diesel fuel or a clogged fuel line. Check if the diesel fuel meets low-temperature requirements; if not, replace it with low-pour-point diesel. Also, remove the fuel filter, clean the wax from the filter element, and replace the filter element if necessary.
Hydraulic System Stalling: Check Oil and Lines
If the hydraulic system operates slowly or sluggishly during operation, it may be due to increased hydraulic oil viscosity or frozen lines. Check the hydraulic oil temperature. If the temperature is too low, start the engine and let it idle to warm the hydraulic oil. If the temperature is normal, check the hydraulic lines for ice; if present, thaw it with hot water. Also check the hydraulic filter for blockage and replace it if necessary.
Equipment Slippage: Stop the Machine Immediately and Clear the Site
If the rotary drilling rig slips while traveling or operating, stop immediately to avoid further slippage. If the tires or tracks are slipping, lay sand, grass mats, or other anti-slip materials on the contact surface. Once the friction increases, slowly move the equipment away from the slipping area.#pile driver for sale#
