Concrete drilling and coring machineAs the core equipment for engineering testing and structural renovation, long-term operation under dust, vibration, and high load conditions is prone to problems such as drill bit wear, power attenuation, and component corrosion. From daily operations to storage management, the system outlines five key measures to ensure stable equipment performance and extend service life.
1、 Daily cleaning and immediate maintenance: eliminate the accumulation of "minor damage"
Clean up immediately after drilling
Core component processing: After the core is taken, immediately use an air gun to remove any remaining concrete debris and mud inside the drill bit, cooling water channel, and power head.
Dismantling and cleaning of easily clogged parts: Disassemble and clean the cooling water nozzle, gearbox vent, and other parts to prevent poor heat dissipation or component jamming caused by concrete gravel blockage.
Case warning: A certain testing institution failed to clean the slag inside the drill bit for a long time, resulting in the drill bit bearing getting stuck and the maintenance cost exceeding 15% of the original equipment value.
Adaptability and cleanliness of work environment
After rain or in humid environments: Use a absorbent cotton cloth to dry the machine body, control panel, and electrical interfaces to prevent moisture from seeping into the circuit board or motor.
Working in saline alkali areas: Rinse the machine body with fresh water to prevent salt and apply rust proof grease to prevent chloride ions from corroding metal parts.
2、 Lubrication and transmission system maintenance: reduce friction losses
Lubricating grease filling specifications
Main shaft bearings: After drilling 50 holes (depth ≥ 100mm) or continuous operation for 20 hours, add high-temperature resistant lithium grease (such as NLGI No. 2) to one-third of the bearing chamber volume.
Gearbox: Replace the gear oil after 50 hours of first use, and then replace it every 200 hours or 1 year (whichever comes first). GL-5 heavy-duty gear oil is preferred.
Drive chain: Spray the chain evenly with chain oil every week to avoid chain link wear or tooth skipping caused by dry friction.
Belt and chain tension adjustment
V-belt tension: Press the middle of the belt with your thumb, and the downward pressure should be 10-15mm (refer to the equipment manual). If it is too loose, it is easy to slip, and if it is too tight, it accelerates the aging of the belt.
Chain tension: Adjust the tension of the chain to ensure that the sagging of the chain in a free state does not exceed 2% of the pitch of the chain links (such as 12.7mm pitch chain sagging ≤ 0.25mm).
3、 Deep maintenance of power system: ensuring continuous output
Maintenance of fuel powered equipment
Gasoline engine:
Replace the air filter element every 50 hours and blow the paper filter element in reverse with compressed air (water washing is prohibited).
Regularly check the spark plug clearance (standard value 0.7-0.8mm). If the clearance is too large, it may cause incomplete combustion, and if it is too small, it may accumulate carbon.
Diesel engine:
Replace the fuel filter every 100 hours to prevent impurities from clogging the fuel injectors.
Preheat the engine oil to a temperature of ≥ 40 ℃ before winter work to avoid cold start wear.
Safety inspection of electric equipment
Cable insulation test: Use a 500V megohmmeter to measure the insulation resistance of the cable every quarter, which should be ≥ 1M Ω. If it is lower than this value, the cable needs to be replaced.
Leakage protection: Test the operating current of the leakage protector every month (≤ 30mA) to ensure that the power is cut off within 0.1 seconds.
4、 Structural component safety calibration: eliminating hidden dangers
Levelness calibration of the aircraft body
Level detection: Place the level at the connection between the power head and the frame, adjust the anchor bolts to center the bubbles, with an error of ≤ 0.5mm/m.
Drilling offset compensation: If the body inclination exceeds the limit, it is necessary to re fix and check whether the pre drilled positioning holes are vertical to avoid the deviation of the core hole.
Drill concentricity verification
Micrometer detection: Install the drill bit on the spindle, rotate the spindle and measure the end face runout of the drill bit, which should be ≤ 0.2mm. Otherwise, the spindle needs to be calibrated or the drill bit fixture needs to be replaced.
The impact of concentricity on lifespan: When the concentricity deviation is 0.1mm, the unilateral wear rate of the drill bit increases by 40% and the lifespan shortens by 60%.
5、 Long term storage management: full process of rust and corrosion prevention
Deep cleaning before sealing
Drill bit rust prevention: After disassembling the drill bit, soak it in rust proof oil (such as WD-40) for 2 hours, take it out, dry it, and apply butter.
Metal component protection: Use rust remover (such as phosphate based) to wipe the body, columns, and bolts, and then spray anti rust primer and topcoat.
Protection of plastic parts: Use a neutral cleaner to wipe the control panel, handles, and other parts to avoid corrosion from alcohol solvents.
Sealing environment control
Temperature and humidity requirements: Store in a dry and ventilated warehouse with a temperature of 5-35 ℃, relative humidity ≤ 60%, and keep away from acidic and alkaline chemicals.
Moisture prevention measures: Place desiccants (such as silicone particles) at the bottom of the equipment and replace them once a month; Cover the entire machine with a dust cover and leave ventilation holes at the top.
Regular start-up: Start the equipment every 3 months and run it for 10 minutes without load, lubricate the transmission components, and inspect the electrical system.
Key Data and Execution Standards
Through systematic maintenance, the following benefits can be achieved: summary and benefit analysis
Equipment lifespan extension: The lifespan of key components such as drill bits and gearboxes is increased by 3-5 times, and the average annual maintenance cost is reduced by 60%;
Efficiency improvement in homework: Reduce downtime caused by malfunctions and increase daily core retrieval by 25%;
Safety risk reduction: The electrical failure rate has decreased by 80%, and the mechanical accident rate has returned to zero.
It is recommended to establish equipment maintenance records, recording the maintenance time, project, and replacement part information for each maintenance, to provide data support for subsequent equipment management.