Lifting machine accident type and case analysis
With the development of production and operation, hoisting machinery has become an indispensable and important equipment in the fields of production, storage and transportation, construction and commodity circulation. It is increasingly used, and the number and types are increasing. Compared with other equipment, lifting machinery has a large number of conditions that are difficult to accurately control. With the lifting and large movement of objects, its workplace needs a lot of work space, and its hidden dangers and unsafe operator behavior Occupational space or equipment and facilities cause injury. According to incomplete statistics, the lifting machine injury accident accounts for more than 10% of the accidents and injuries of the employees of our company.
1. There is a diagonal pulling and inclined lifting in the process of lifting the beam. Violation of the safe operation regulations for lifting. 
2. According to the regulations of the industry, no cranes are allowed under the crane boom!
Crane damage case
At 3 pm on July 4th, XX, the K109+240 bridge of the XX tender section was suspended from the beam, and a beam was transported from the beam yard to the K109+240 bridge on the way to the beam bridge. The beam hit a 12T crane on the right. Legs, so that the beam side overturned. Then use a 12T crane and a 16 crane to turn the inverted floor slabs upright. When lifting, the 12t crane and the 16t crane are not synchronized, causing the beam to oscillate towards the 12t crane. Hong Moumou pushes the beam forward with both hands. The board, due to the slanting force of the beam, one end collides with Hong Moumou, and pushes it to the tail of the 12T crane, causing a backlog, the buttocks being hit by a crane hook, and bleeding from the humerus fracture. Hong Moumou was immediately sent to the Longquan City People's Hospital for treatment. After the operation, he was transferred to the People's Hospital of Lishui on July 5th. He died at about 10:00 on July 7 at the People's Hospital of Lishui.
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.hfrollershutterdoor.com