50 kilometers southwest of Chenzhou City, Hunan Province, the mountains and rivers along the way are beautiful, when the roadside flashes high and empty black sheds, and the words "graphite" and "coal", the mountain on the left side of the road is not too tall. Eyes, like a few large dark brown patches on green clothes, this is the Lutang graphite mining area, which is famous in China and abroad. Lutang Town is on the west side of the middle of this 45 square kilometer mining area. The history of graphite mining in Lutang can be traced back to the 20s and 30s of the 20th century. The local earth-like graphite has large reserves, large output and good quality. It is called “the capital of graphiteâ€. The useless meteorites are thrown in the mine mouth. Covered one side of the green hill and became the dark brown patch mentioned above. Li Jinshan, deputy director of the Zhangzhou Coal Management Bureau and director of the Graphite Office, said that it has been a lot of grass since it stopped mining for a year. Soon after entering the mining area, at least 5 mines were seen in more than 100 meters. Imagine how lively it was a year ago. Now these mines have been sealed with stones. A worker hired by Southern Graphite Co., Ltd. is guarding the gate. Southern graphite is the grandson of China's building materials for large-scale central enterprises. In August last year, Zhangzhou graphite mine was suspended for rectification. Southern graphite was subsequently registered in Chenzhou, becoming the main body of integration, and it took out 2 billion yuan to acquire graphite resources. The resources under these mines are now Purchased by Southern Graphite. Lutang Town, which relies on graphite mining and processing for a living, suddenly stopped from the buzzing sounds. There were various slogans on the streets to support integration and stop indiscriminate mining, and tens of thousands of people left the area. Ordinary miner Li Yuhua did not intend to go. When he learned that the reporter wanted to know the local people's views on the integration of graphite resources, he took the initiative to open the reporter: "I hope resources are protected and I hope to have a job." He turned out to be the bottom of Hunan. A worker of a graphite mine has moved to this place after depletion of local resources. It has been more than 20 years now. In the field of graphite mining, local private bosses have withdrawn, and southern graphite has become a resource monopoly. In the field of graphite processing, one of the conditions for the southern graphite to promise to the Ganzhou government is to carry out deep processing. The prospect of the local graphite processing boss is unclear and has its own plans. Cao Jingwei, who has been engaged in the graphite industry for 42 years, has a graphite processing plant in Zhangzhou. Since the integration of graphite resources, he opened a family in Sanming City, Fujian Province last year. Now the processing plant in Fujian is bringing a lot of profits to him because of the close proximity to graphite mines. "Do not count the processing links, but also earn 500 yuan / ton more than others." He Shanyou is ranked among the “Four Big Family†of local graphite processing. He said that he has not participated in management. The company is taking care of his son. After the graphite mine is shut down, the company still has some stock, but the main products have changed. Now the company mainly produces carbon. Bricks and carbon bricks are used in the foundry industry. Coal can be used as a raw material, and the dependence on graphite is relatively small. "But carbon bricks are defective and cannot be used in the field of precision casting." Wen Zhonghua, the boss of Zhangzhou Seiko Graphite Co., Ltd., who is committed to the deep processing of graphite, has recently faced the trouble of choosing a partner. One is Southern Graphite, the company has a pre-emptive advantage, the other is the National Defense Military Enterprise Association. The National Defense Forces also recently operated in Ganzhou to collect graphite deep processing materials. The National Defense Military Industry plans to set up an industrial fund for investment. Although the defense industry entered the late stage, it is believed to help the company in the sales market. Graphite is widely used in military products. Wen Zhonghua was a half-way monk, but he was heavily involved in the deep processing of graphite. Wen Zhonghua was the first local dance business in Zhangzhou. He also did renovations and imported auto repairs. He said that he was listening to a boss at a meeting held by the industry and commerce association, saying that graphite deep processing can make a lot of money, so he decided to invest. I didn't expect to get caught up in it now. As the debts were overdue, Wen Zhonghua became a controversial figure in the local area. Wen Zhonghua has a number of patents for deep processing of graphite, which is the target of Li Jinshan. After leaving the post of deputy director of the Bozhou Municipal Coal Administration and director of the Graphite Office, Li Jinshan was hired as a consultant by Nanfang Graphite. He was mainly responsible for the introduction of deep processing enterprises. Nanfang Graphite plans to invest 3 billion yuan to build a graphite deep processing industrial park. Others are looking for other ways out. Huang Shan, chairman of the Taishanli Graphite Products Company of Lutang Town, changed his business direction. He said that he has taken a fancy to a mountainous area. Now he is focusing on mountain improvement and plans to plant advanced rice and fruit trees, hoping to open up the high-end consumer market. The reporter learned that most of the local graphite merchants do not intend to leave this field easily. On the one hand, this is their own family, on the other hand they have no advantage. There are precedents in this respect. Qingdao can be described as the birthplace of Chinese scale graphite talents. When local resources are exhausted, many Qingdao people move to other places to continue their efforts, and they have made great achievements in the field of graphite mining and processing.Other Door Accessories
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.highspeedshutterdoor.com