A grievous accident occurred on July 10, 2016. When a truck driver unloaded goods from a farm truck driver in Dao County, Hunan Province, he did not look around to see if there were any obstructions around him. He touched the high-voltage cable and the driver was on the spot. Being electrocuted, the tragedy finally occurred. In fact, we can know from the above incident that the driver himself is not clear what matters to pay attention to when unloading, casually rashly raise the body of the car, but also let their own life forever stop. Today Xiao Bian told everyone about what matters should be paid attention to when unloading dump trucks . 1. Before unloading, you must check if there are obstacles around the 5 meters of the vehicle. Whether it is personnel or power poles are obstacles, the driver should drive to the safe zone to carry out some goods, otherwise it will happen that the aforementioned accident, as long as I have a long snack, I think this situation can be avoided. No one wants to joke about his life. 2. The unloading ground should be leveled. Almost all truck drivers need to open to the flat ground to dare to carry out the operation. This is also a problem that the dump truck driver should pay attention to first. The ground on the dump site must be flat, especially if it cannot be deflected. If the center of gravity shifts after the dump truck's container is raised, a large center deviation will occur and it is very prone to rollover. 3. The ground should be solid to prevent car trapping. There is also a possibility that a flat road surface is heavy. The dump truck is heavy and the ground is soft. After the lift, the force on the rear wheel becomes larger and the side tires subside. In response to this situation, the suggestions given by netizens are more attention when unloading the car. When the bucket is half up, pay attention to check whether the tires on both sides are trapped. It is advisable that one person assist in watching the hydraulic pressure outside the car. The cylinder has no inclination. If there is a tilt, use a slow gear to lower the top and change to a stable place. 4. After the bucket is opened, the location of the unloading site has to be paid attention to by the driver. The first step is to open the rear bucket. It seems very simple and does not require reminding knowledge, but there are many accidents because of this There was a rollover situation. If you do not pay attention to forget to open, after raising the body of the car, the center of gravity of the entire vehicle will rise and the road surface will be uneven. The consequences will be serious! 5. To prevent the top of the door from being damaged, the dump truck is now much more loaded, and the unloading volume is also large. The driver should also pay attention to prevent the top of the door from being unloaded to the goods. In fact, the driver should pay attention to the overload, must download the goods in the vehicle's maximum load, if overloaded, the consequences could be disastrous. These few small details, many drivers are aware of, but in the operation often due to their negligence resulted in serious consequences of the accident, I hope that each driver in strict accordance with these precautions require themselves to their own lives Put in the first place.
Gantry crane is a kind of bridge crane in which
the horizontal bridge is arranged on two legs to form the shape of the
gantry.This crane operates on ground rails and is mainly used for handling and
installation in open storage yards, shipyards, power stations, ports and
railway freight stations.
Gantry crane lifting mechanism, trolley running
mechanism and bridge structure, and bridge crane is basically the same. Due
to the large span, the crane operating mechanism mostly adopts the separate
driving mode, in order to prevent the crane to produce skew operation and
increase the resistance, and even the accident. Gantry crane crane trolley
running on the bridge, some crane trolley is a boom crane. The legs on
both sides of the bridge are generally rigid legs; When the span is more
than 30 meters, one side is often rigid leg, and the other side is flexible leg
connected by the ball hinge and bridge, so that the gantry becomes a static
determined system, which can avoid additional stress caused by lateral thrust
under the action of external load, but also can compensate the longitudinal
temperature deformation of the bridge. The wind area of the gantry crane is
large, in order to prevent sliding or tipping over under the action of strong
winds, Crane rail clamp equipped with wind gauge and interlocking with
operating mechanism; It
can also be cantilevered at one end or cantilevered at both ends to extend the
range of operation. The bridge of semi-gantry crane has legs at one end
and no legs at the other end. It runs directly on the high platform.
(1)Ordinary gantry crane: This crane is the most widely used,
can carry a variety of pieces and loose materials, lifting weight of less than
100 tons, span of 4 ~ 35 meters. The ordinary gantry crane with grab works
at a higher level.
â‘¡ gantry crane of hydro power station: mainly used for lifting and opening and
closing the gate, but also for installation. Up to 80 ~ 500 tons of weight,
span is small, 8 ~ 16 meters; The lifting speed is low, ranging from 1 to
5 m/min. Although this crane is not often lifted, but once the use of work
is very heavy, so we should appropriately improve the level of work.
(3)
Shipbuilding gantry crane: It is used to assemble the hull of the ship berth.
There are two lifting carts: one has two main hooks, which runs on the track of
the flange of the bridge; The other, with a main hook and a secondary
hook, runs on rails at the lower flange of the bridge to flip and lift large
hull sections. The lifting weight is generally 100 ~ 1500 tons; Span
up to 185 meters; The lifting speed is 2 ~ 15 m/min, and the fretting
speed is 0.1 ~ 0.5 m/min.
(4)
Container gantry crane: used in container terminals. After the containers
unloaded from the shore wall container carrying bridge are transported to the
yard or rear by the trailer, they are piled up by the gantry crane or loaded
directly to the truck, which can speed up the turnover of the container
carrying bridge or other cranes. The container yard can be stacked 3 ~ 4
layers high and 6 rows wide. Generally, the yard uses the tire type and also
uses the rail type. Compared with the container gantry crane, its span and
the height of both sides of the gantry are larger. In order to adapt to
the transportation needs of the port terminal, this crane works at a higher
level. The lifting speed is 35 ~ 52 m/min; The
span is determined by the number of container rows to be crossed. The maximum
size is about 60 meters. The lifting weight of the container in the
"single box" operation is about 40.5 tons, and the lifting weight of
the "double 20-foot box" operation is 61 tons and 65 tons.
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