A dust suction hood includes a tapered outer cover, a cylindrical outer cover, a tapered inner baffle plate disposed in the tapered outer cover, and a first blocking member matched with an opening in the other end of the cylindrical outer cover. A top opening of the tapered outer cover is matched with an opening in one end of the cylindrical outer cover. A side wall opening of the cylindrical outer cover serves as a dust outlet. A first gap is formed in the tapered outer cover. A first dust suction port is formed between bottom openings of the tapered inner baffle plate and the tapered outer cover. A first drill pipe connecting port is formed in the first blocking member. A drill pipe of the mine drill passes through the first drill pipe connecting port to penetrate the dust suction hood on the drill pipe.

The present invention relates to a ground milling machine, in particular a road milling machine, for removing ground material, comprising a machine frame having a chassis, a milling drum supported on a machine frame, and a transport device having at least one conveyor belt, which is configured for conveying removed ground material in a conveying direction away from the milling drum to a discharge point, as well as to a method for operating a ground milling machine. One aspect of the present invention is to provide an electrostatic precipitator, which reduces the dust pollution.

A dust suction hood includes a tapered outer cover, a cylindrical outer cover, a tapered inner baffle plate disposed in the tapered outer cover, and a first blocking member matched with an opening in the other end of the cylindrical outer cover. A top opening of the tapered outer cover is matched with an opening in one end of the cylindrical outer cover. A side wall opening of the cylindrical outer cover serves as a dust outlet. A first gap is formed in the tapered outer cover. A first dust suction port formed between bottom openings of the tapered inner baffle plate and the tapered outer cover. A first drill pipe connecting port is formed in the first blocking member. A drill pipe of the mine drill passes through the first drill pipe connecting port to penetrate the dust suction hood on the drill pipe.

A cold planer and method for ventilating the cold planer. The cold planer comprises a frame, a hood, a milling drum and a ventilation system. The hood is disposed under the frame and defines a cutting chamber. A milling drum is disposed inside the cutting chamber under the hood. The ventilation system comprises a cutting chamber port, a boost fan, a settling box and a main fan. The cutting chamber port extends through the hood. The boost fan is configured to generate a siphon that draws airflow from inside the cutting chamber through the cutting chamber port. The settling box is configured to cause particles to drop out of airflow. The settling box is in fluid communication with the cutting chamber port. The main fan is configured to draw airflow from the settling box and a region in front of the hood and vent it away from the cold planer.

A filter assembly includes a first screen, defining a first flow passageway, a second screen, defining a second flow passageway, and a third screen defining a third flow passageway. The second screen is positioned between the first screen and the third screen. The first flow passageway is aligned with the third flow passageway and the second flow passageway is offset from the first flow passageway and the third flow passageway.

A cold planer and method for ventilating the cold planer. The cold planer comprises a frame, a hood, a milling drum and a ventilation system. The hood is disposed under the frame and defines a cutting chamber. A milling drum is disposed inside the cutting chamber under the hood. The ventilation system comprises a cutting chamber port, a boost fan, a settling box and a main fan. The cutting chamber port extends through the hood. The boost fan is configured to generate a siphon that draws airflow from inside the cutting chamber through the cutting chamber port. The settling box is configured to cause particles to drop out of airflow. The settling box is in fluid communication with the cutting chamber port. The main fan is configured to draw airflow from the settling box and a region in front of the hood and vent it away from the cold planer.

A system for removing debris from a drill hole, the system comprising: a drill system comprising: a drill rod comprising a proximal end, a distal end a first lumen extending between the proximal end and the distal end, and a second lumen extending parallel to the first lumen, the first lumen being fluidically-isolated from the second lumen; a drill bit, the drill bit comprising: a proximal end for mounting to the distal end of the drill rod; a distal end configured to drill into a material so as to form the drill hole; at least one air channel extending between the proximal end of the drill bit and the distal end of the drill bit, the at least one air channel being configured to be fluidically connected to the first lumen of the drill rod when the dual channel drill bit is mounted to the drill rod; at least one vacuum channel extending between the proximal end of the drill bit and the distal end of the drill bit, the at least one vacuum channel being configured to be fluidically connected to the second lumen of the drill rod when the drill bit is mounted to the drill rod; a container fluidically connected to the second lumen of the drill rod; a compressor, the compressor being fluidically connected to the first lumen of the drill rod and fluidically connected to the container; wherein the compressor (i) pumps pressurized air through the first lumen of the drill rod such that the pressurized air passes through the at least one air channel of the drill bit and exits the distal end of the drill bit into the drill hole, and (ii) pumps air out of the container so as to generate a vacuum within the container, which vacuum is fluidically connected to the second lumen of the drill rod and hence to the at least one vacuum channel of the drill bit, such that pressurized air exiting the at least one air channel into the hole and debris in the hole enters the at least one vacuum channel, passes through the second lumen of the drill rod and into the container, such that the debris is collected in the container.

The present invention relates to a ground milling machine, in particular a road milling machine, for removing ground material, comprising a machine frame having a chassis, a milling drum supported on a machine frame, and a transport device having at least one conveyor belt, which is configured for conveying removed ground material in a conveying direction away from the milling drum to a discharge point, as well as to a method for operating a ground milling machine. One aspect of the present invention is to provide an electrostatic precipitator, which reduces the dust pollution.

To allow removal or replacement of mining equipment from a tunnel without unduly limiting the size of the mining equipment or without an unduly excessive cross-section of the tunnel, the mobile unit includes a conveying system having a first and a second transfer area, and a dust extraction system. The conveying system receives mined material in the first transfer area, conveys the received mined material to the second transfer area and dispenses the received and conveyed mined material at the second transfer area. The dust extraction system receives dust-laden air, extracts dust from the dust-laden air and discharges air from which dust is extracted. The mobile unit includes a first and/or a second dust collector for collecting dust-laden air from the first and/or second transfer area, respectively, with the first and/or second dust collector being arranged to supply the collected dust-laden air to the dust extraction system for dust extraction.

The present invention relates to a ground milling machine, in particular a road milling machine, for removing ground material, comprising a machine frame having a chassis, a milling drum supported on a machine frame, and a transport device having at least one conveyor belt, which is configured for conveying removed ground material in a conveying direction away from the milling drum to a discharge point, as well as to a method for operating a ground milling machine. One aspect of the present invention is to provide an electrostatic precipitator, which reduces the dust pollution.