On March 12th, the world's first full-section hard rock roadheader (TBM) operation line of Lijing Coal Mine achieved safe safety in the 1413A high-drainage roadway of Zhangji Mine of Huainan Mining Group, which marked the successful completion of the 52-day test. According to statistics, the total line footage of the operation line is 700 meters, and the average daily footage is 13.5 meters, which is equivalent to a monthly footage of 404 meters, which breaks the highest record of hard rock single entry in Huainan mining area. The full-section hard rock roadheader operation line of Lijing Coal Mine is the world's first full-section hard rock roadheader used in roadway excavation in vertical mines. It is the coal industry upgrading project of the National Development and Reform Commission. For a long time, Huainan Mining Group has been based on equipment and management upgrades, and has unswervingly promoted the mechanization of rock lanes. Since 2012, it has organized the research and development, design, manufacture, installation and construction of the project, and won the first opportunity for the trial project to settle in Huainan Mining. In November 2014, the world's first full-section hard rock roadheader operation line of Lijing Coal Mine was installed at the 1413A high-drainage roadway of Zhangji Mine of Huainan Mining Group; in January 2015, it was put into trial operation and officially operated in the middle of the month. Faced with many complicated situations such as full-section quartz sandstone (rock compressive strength 80 MPa), roadheader line length (up to 50 meters), and own weight (total weight 350 tons), Huainan Mining Group launched independent innovation. The research has overcome the difficulties of large-scale equipment entering the well installation, highlighting the mine's “explosion-proofâ€, slag discharge, material personnel transportation, and fault crossing, ensuring the smooth progress of the installation, initial launch, excavation, and penetration tests, and successively created quartz sandstone excavation. The highest small class footage is 14.5 meters, and the highest daily footage is 30.7 meters. In addition, the test also shows that since the application of the equipment, coal mine rock roadway single-entry, production efficiency is 5 to 10 times higher than the current gun excavation, greatly reducing the labor intensity of workers, and basically achieving the essential safety production of coal mines.
"The successful test of this line is an important achievement of Huainan Mining Group's promotion of production mode transformation, and it is also a milestone revolution in China's coal mine underground rock roadway. We will continue to manage and use the full-section hard rock roadheader line. It has accumulated more valuable experience for the rapid mechanization of the same type of mine rock roadway in Huainan mining area and even the whole country.†Huanan Mining Group said.
Sectional Door Accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.
Detail introduction for above main accessories
1.Motor and controller:
The garage door operator is designed for residential overhead sectional and tilt doors.
The operator memorizes the limit positions and unique braking system that slows the unit down at the end of its travel.
Rolling code remote control with max. 20 pcs hand transmitters.
The operator is equipped with a manual release lever which allows manual operation of the door in case of power failure.
The controller has a security LOCK function which prevents operation of the door from transmitter.
2.spring break device:
Sectional doors are hinged and they bend in the tracks as the door opens and closes. Many of these doors are counterbalanced with extension springs, also designated "stretch springs," and they have seven characteristics. The length is the measurement of all the coils pressed together. This, along with the inside diameter of the coils and wire size - the thickness of the wire from which the springs are made - determine the stretch, the distance the spring is extended - normally half the door height, and pull, the force the spring pulls when stretched its normal length. The type of ends determine how the ends of the spring are mounted. The initial tension is the percentage of pull needed to separate the coils. This is determined by the pitch with which the springs are wound. On sectional garage door springs this is normally 15 percent. For example a 100 pound pull spring requires 15 pounds of weight to separate the coils; when a door is open the two springs will support 15 pounds of door weight without any stretch.
Most extension springs are made of oil tempered wire. These are normally coated or painted. Some springs are made of galvanized wire.
3.able break device:
cable break device ,door hardware
adjustable bottom bracket .
the raw material hot plate
zinc plated
safety device
adjustable bottom bracket
the raw material hot plate
zinc plating
spring safety device ,2" and 3" safety device
once the cable is broken ,this devoice can keep the hurt away from the door falling
4.aluminum alloy rope pulley
Equipment: CNC stamping/punching machine, CNC bending machine, CNC cutting
machine, 5~250 tons punching machines, welding machine, polish machines...
Processed material: stainless steel: copper, carbon steel
Surface treatment: Hot galvanized, polishing
Making process:Stamping, deep drawing,bending, punching, laser cutting,threading,
welding, tapping, riveting, grinding
5.air bag system
It is a safety device. When the door is down to hit something, it will up automatically.
Operation pressure:<3mbar
Battery:CR2032*2
Battery lifetime>1 year
Emission frequency: 315MHZ
Emission power:<10mW
Receiver power source:12V
6.duplex enhanced guide wheel bracket
Determining the right type of sectional door roller for your garage door tracks can be a little confusing, especially when you do not know what you need to look for in a garage door roller. To simplify things, there are two primary things you need to be aware of. First are the actual dimensions of the roller, and second is purpose that you will be using the door for. You can read below about measuring your roller and choosing the right quality of material for your door.
Other Door Accessories,Electronic Door Accessories,Automatic Door Accessories,High Speed Door Radar Detector
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfhighspeeddoor.com