First of all, the bundle puller should be placed in a flat place on the ground and protected from rain. The steel cable used to hoist the extractor should match the hoisting load. When starting and stopping the machine, confirm the initial position set by the extractor. It is strictly prohibited to set up a temporary power supply in places with explosion and fire hazards, and the capacity of the power supply should match the power of the extractor. The extractor does not have explosion-proof function and should have a good ground wire. Confirm that there is no remote control with the same frequency within 100m around to prevent interference.

 

Secondly, the output force of the lead screw of the extractor is only 3000kg, and the tube bundle cannot be pushed in alone, only with the traveling crane to push the tube bundle into the heat exchanger completely. When operating at a height of more than 2 meters, the operator should wear a safety belt. In the process of disassembling or reinstalling the tube bundle, if there is a blockage, stop the operation immediately, and after inspection and adjustment, resume the disassembly or extraction and installation, and never force the tube bundle. The handle of the primary tension beam can only bear its own weight, and the steel cable should be hung on the main body of the primary tension beam, not on the handles at both ends of the primary tension beam, otherwise, the handle may be broken.

 

Furthermore, the operation of the bundle puller is very simple, but it should be noted that gear oil should be added to the gearbox of the reducer; after the first 160 hours of operation, new oil needs to be replaced, and the bearing grease should be replaced at least once a year.

 

In addition, during regular maintenance, the inside of the tube bundle should be flushed with steam and water to remove dirt, and the thickness of the corrosion should be checked. The value should not exceed the specified value (3mm for carbon steel). When reinstalling after inspection, the gasket and flange of the plug should be replaced. During regular maintenance, a layer of silver powder paint should be applied to the outer surface of the tube bundle (excluding the fin surface). Check the fastening, wear, and lubrication of each component, and deal with any problems found in time. At the same time, clean the equipment to remove dirt, oil, and other debris from the surface to maintain the cleanliness of the equipment. The transmission components, bearings, etc. in the bundle puller need to be regularly filled with lubricating oil or grease to ensure their good lubrication status. At the same time, check and replace the seals of the equipment to prevent leakage due to poor sealing. Regularly check and maintain the electrical control system of the bundle puller, including checking the connection of cables, connectors, and replacing damaged components. At the same time, back up and update the programs of the electrical control system to ensure its stability and reliability.

 

Regular maintenance of the bundle puller can ensure the normal operation of the equipment and extend its service life. Flushing the inside of the tube bundle can remove dirt and ensure the heat exchange effect. Checking the thickness of the corrosion can detect the corrosion of the equipment in time to avoid damage to the equipment due to severe corrosion. Replacing the gasket and flange of the plug can ensure the tightness of the equipment. Applying silver powder paint can prevent rust on the outer surface of the tube bundle. Checking the fastening, wear, and lubrication of each component can detect problems in time and deal with them to ensure the normal operation of the equipment. Adding lubricating oil or grease can ensure the good lubrication status of the transmission components and bearings. Checking and replacing the seals can prevent leakage. Checking and maintaining the electrical control system can ensure the safe operation and stability of the equipment.

 

What to do if the finned tube leaks in the bundle puller?

 

When the finned tube leaks at the end, the tube can be re-expanded. The number of re-expansions should not exceed 2 times, and over-expansion should be avoided. If the expansion joint cannot be repaired, the finned tube should be replaced. As a temporary measure, a metal plug can also be used to block it. If a leak is found on the sealing surface of the tube bundle, the plug of the plug-in tube box can be tightened appropriately. If there is still no effect, the gasket or plug should be replaced (when replacing the gasket or screwed fastener, the machine should be stopped and the medium should be vented first, and then proceed).

 

When a finned tube leaks, corresponding treatment measures should be taken according to the specific situation. If the leakage is minor, the tube can be re-expanded, but attention should be paid to the number of re-expansions and over-expansion. If the expansion joint cannot be repaired, the finned tube needs to be replaced. In an emergency, a metal plug can be used as a temporary measure. For leaks on the sealing surface of the tube bundle, the plug can be tightened first. If the problem still cannot be solved, the gasket or plug needs to be replaced. When performing these operations, be sure to stop the machine and vent the medium to ensure the safety of the operation.

 

Conclusion: The bundle puller needs to pay attention to correct placement, master the operation points, regular maintenance, and timely handling of finned tube leaks in daily use. Only by doing a good job in these aspects can the normal operation of the bundle puller be ensured, its service life be extended, and work efficiency be improved. At the same time, the operator should strictly follow the operating procedures when using the bundle puller to ensure the safety of himself and the equipment.

The daily maintenance of the bundle puller is very important. Here are some common maintenance methods.

2024/10/28
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