Negative Pressure Dust Collection Technology for Multifunctional Maintenance Integrated Machine: Improve Operating Environment and Enhance Pothole Repair Quality

By installing a negative pressure dust collection device on a multi functional maintenance integrated machine equipped with a milling machine and a sweeper, dust generated during milling and sweeping operations is collected into the hopper of the integrated machine via negative pressure. This improves the working environment and eliminates potential safety hazards to surrounding vehicles and personnel during operations.

Disadvantages of ordinary pothole repair

At present, round hole square patching is the most common daily pothole repair technique for expressways and urban roads. The process involves trimming the edges of the pothole, cleaning the area, spreading emulsified asphalt, paving asphalt concrete, compacting the asphalt concrete, and finally applying anti crack stickers to the surface. Large amounts of dust are generated during the operation, which degrades the working environment. Though some construction equipment is fitted with water spray dust suppression systems for milling and cleaning operations, such systems increase construction difficulty.

• The viscosity of debris after water jet milling increases significantly, making cleaning more difficult.
• The water spraying tank has a limited capacity and can generally sustain spraying operations for only over an hour before running dry. It is relatively difficult to replenish water on site, so additional equipment needs to be prepared for water supply.
• Water spraying operations leave water traces in the cleaned potholes and trenches, and rapidly lower the temperature of the hot asphalt used for repair, which adversely affects construction quality. Therefore, repairs can only be carried out after the moisture is completely dried, resulting in extended construction periods. For this reason, the water spraying method is rarely adopted at many work sites.

  Advantages of Repairing with the Multi Functional Maintenance Integrated Machine

  Adopting negativepressure dust collection technology can effectively suck up dust, allowing other debris to be recycled and reused, which further better preserves the gradation of asphalt. Meanwhile, the dust free on site environment significantly improves visibility and effectively safeguards the safety of staff.

• Enclosed protection was implemented for the milling machine and sweeper, with rubber fitted around the perimeter to enhance negative pressure performance.
• Quick change device is innovatively designed for the milling, sweeping and negative pressure dust suction pipe.
• Block the air duct opening of the sweeper during milling operations; block the air duct opening of the milling machine during sweeping operations, which enables extremely convenient operation. When the milling and sweeping functions are not required and the front end is replaced with other attachments, it can be secured inside the rubber strap on the boom arm.