Hydraulic pipe bursts are a common challenge for operators of second-hand slag-stripping machines. When a hydraulic pipe bursts, it often leads to hydraulic oil leakage, which can make maintenance a tedious and time-consuming task. Understanding the causes of these bursts is key to preventing them and minimizing losses.
One common reason is the use of substandard hydraulic pipes. When an original pipe is damaged, many opt for cheaper alternatives that don't meet the required standards. These inferior pipes often lack the durability and reliability of the originals. Additionally, the metal joints at both ends may have poor crimping processes, leading to potential leaks over time. It’s crucial to replace hydraulic pipes with certified brands and original products. Working with reputable distributors who specialize in original parts can be beneficial. They often offer products at a fraction of the cost of the original while maintaining quality and providing excellent service. Simply provide them with the equipment model, and they’ll handle the rest.
Another factor is excessive hydraulic system pressure. Testing the pressure values generated by the main pump during various operations can help identify if the preset pressure is too high. If so, adjusting the pressure settings on the multi-valve can mitigate the risk of pipe bursts.
High hydraulic oil temperatures can also contribute to pipe exposure. If the oil temperature is too high, it can compromise the seals of hydraulic components and lead to leaks. High temperatures can also cause expansion in hydraulic components, potentially jamming valve cores and bodies, creating localized high-pressure zones that can result in pipe bursts.
Mixing hydraulic oils of different grades can be another issue. Using wear-resistant hydraulic oil grade 46 by default but adding incompatible oils from accessory stores can destabilize the oil properties and harm components. High-viscosity oils can create higher pressures within the system, increasing the likelihood of leaks.
Poor operational habits can also play a role. Rough handling during operation generates significant impact loads, creating instantaneous pressure spikes that can damage hose connections or burst pipes prematurely. Such practices not only shorten the lifespan of hydraulic pipes but also affect other components, leading to frequent mechanical failures. Operators should always exercise caution and avoid high-intensity or risky actions.
Corrosion is another concern. While modern hydraulic pipes are corrosion-resistant, prolonged exposure to high pressure and flow rates can degrade rubber components. Avoid exposing hoses to gasoline or diesel, as they can cause swelling and deterioration. Regularly cleaning the exterior of hydraulic pipes and avoiding contact with corrosive substances like diesel can help prevent damage.
Abnormal vibrations caused by gear pumps and plunger pumps can also stress hydraulic pipes. These vibrations, though difficult to eliminate entirely, can lead to pipe fatigue and wear over time. Frequent checks of pipe clamps and protective sleeves are essential to prevent loosening, which could expose the pipes to further damage.
In the event of a burst pipe, immediate action is necessary. Lower the bucket to the ground, shut off the engine, and reduce system pressure to minimize oil loss. Some hydraulic systems allow for swapping high-pressure and low-pressure hoses within the same circuit, using intact hoses to bear higher pressures temporarily. However, these are only short-term fixes. A new hydraulic pipe should be installed promptly, and hydraulic oil should be replenished.
While these measures can help manage the situation, preventing pipe bursts in the first place is the best strategy. Regular maintenance, proper part selection, and careful operation are all essential to ensuring the longevity and reliability of hydraulic systems in second-hand machinery.
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