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.
Gantry Crane,Lifting Capacity Gantry Crane,Rail Mounted Gantry Crane,Huge Steel Frame Gantry Crane HENAN MAJOR INDUSTRIES IMP. & EXP. CO., LTD. , https://www.henanminingcrane.com
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More than 2,000 people evacuated from sudden collapse of ground in Liuzhou suspected of being related to real estate development
Liuzhou sudden collapse of the ground evacuation more than 2,000 suspect diesel generators related to real estate development | Diesel Generator Price / 2012-05-10
At about 11:15 am on May 10th, a large-scale subsidence took place in Hatuchupun, Liuhe District, Liuzhou City, Guangxi Province. Many factories and houses collapsed and more than 2,000 residents in the village were evacuated. Fortunately, the evacuation was not timely. The casualties were found. Some villagers have speculated that the collapse may be related to local real estate development. The specific reasons are still under investigation.
The Network News Network reporter learned from the local authorities that there was a crack in the west of the village and a factory under construction of a commercial house. At the time, the plant at the end of the village collapsed and the interior of the factory collapsed to a depth of nearly one meter. Affected by the incident, a large dwelling with a size of about 10 square feet was instantly collapsed in a residential building next to it. Subsequently, the collapse began to spread around, and wherever they went, the houses were cracked to varying degrees.
After the accident, fire, public security and other departments immediately evacuated the villagers. Considering that the village has no security conditions, it is likely to collapse again at any time. As soon as the fire officers and soldiers face an emergency evacuation of the stay in the village, they search for the site of collapse and look for people who may be buried. As of 13:50 pm the same day, after searching the entire village for many times, no trapped people were found.
At the time of writing, cracks still appeared. The village’s approximately 3,000 square meters of road sections and houses had collapsed and cracked in varying degrees. The villagers stated that the large collapse of the village was estimated to be related to local real estate development. At present, the relevant reasons and specific losses are still under investigation.
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