How to Repair Flexible Mine Air Ducts

Flexible air duct is an important part of mine ventilation system. Mine air ducts are usually made of PVC coated fabric. However, long-term use and harsh working environment may cause damage to the air duct, affecting the ventilation effect and even causing safety problems. If the damaged area is large, we can replace a new air duct. If there is only some minor damage, we can fix it. This article will detail how to repair flexible PVC mine air ducts to ensure that they continue to operate efficiently.

Preparation before repair

1. Check the extent of damage

First of all, it is necessary to conduct a comprehensive inspection of the degree of damage to the air duct. For minor damage, such as small cracks or holes, local repair can be used; for severe damage, such as extensive tearing or breakage, the entire duct section may need to be replaced.

2. Clean the damaged area

Clean the damaged area and its surroundings thoroughly with a clean cloth to remove dust, oil and other impurities.

Local repair method

1. Sewing and glue repair

 For cracks or holes smaller than 0.02m, it can be repaired with thread sewing and glue. If you sew, use double thread and choose the distance between each thread according to the damage. In order to achieve better repair results, sew “up and down”. For better durability and no air leakage, glue on after sewing. It is also common to use only glue to repair. When using glue, be sure to hold up the fabric inside the air duct until the glue dries. At the same time, it is necessary to avoid the ducting pasting together at the inside.

2. Hot air gun repair

 We can repair the duct with a hot air gun. It is the most professional way to repair air ducts. This type of repair is optimal. Take a large enough piece of patch material and weld it to the damage using a hot air gun. It is important to note that the duct should be cushion directly below the part you are welding! The temperature of the air outlet of the hot air gun is very high, be careful when using, pay attention to protection!

3. Zipper repair sleeve

 In addition, we can also provide zipper repair sleeves. This is a quick and easy way to repair the air duct. Simply place the repair sleeve around the duct, cover the damaged part of the duct, and close the zipper. Zipper repair tubes range in diameter from Dia300mm to Dia3200mm.

Conclusion

Through the above method, the damage problem of PVC air pipe can be effectively repaired to ensure that it continues to operate efficiently and safely. At the same time, strengthening daily maintenance is also an important measure to extend the service life of the air duct.