Semi Gantry Cranes

Overview:Compared with the overhead crane, it saves the workshop space occupied by pillars; Compared with the gantry crane, it saves the production space; One side is support leg, the other side is end carraige as overhead crane, making better use of the plant structure. It is one cost-effective crane solution!

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Introduction
Parameter
Specifications

Semi gantry crane is a special form of Gantry Crane. Just as shown in the picture, at one side of the crane, this gantry crane for sale runs on an elevated runway system like a overhead crane along the length of the factory.
At the other side, it just runs like a standard rail mounted gantry crane. This special overhead gantry crane for sale allow you extend your workplace by not needing a runway system from the top of the building.
Compared with gantry crane, it uses the structure of the plant instead of a new leg of the crane itself. Undoubtedly, it owns a more cost effective. Considered that semi gantry crane doesn't depend entirely on the plant, this special structure gantry crane has an advantage on the flexibility over EOT crane.
There are two typical applications:
Indoors, it is often used under the existing overhead cranes to provide more hooks, thus improving the the productivity of your factory.
Outdoors, often is used near the building, making full use of the existing runway structure, thus improving the cost efficient of your factory or plant.

Depending on the loading capacity, this special kind gantry crane can be formed in single girder gantry cranes, as well as double girder gantry crane. So, if you want to see more technical parameters, you can just get a reference from corresponding Overhead Cranes or Gantry Cranes.

Item	Parameter
Standard Capacity	2t-40t
Span length:	15-30m
Lifting height:	6m, 9m, 12m,etc.
Work duty	A3-A6
Rated voltage	220V~690V, 50-60Hz, 3ph AC
Crane control mode	Pendant control / Wireless remote control / Cabin control
Work environment temperature	-25℃～+40℃, relative humidity ≤85%

Main beam		The main beam is the crane's main load-bearing component, and the running track for the electric hoist. It is a triangular beam is weld by a support frame(welded by angle steel and other section steel) and an I-beam. The main beam is made into an upper arch according to the requirements, and the upper arch F should be (1/1000～1.4/1000)S. The two sides of the span are designed with saddles connected to the outriggers, and there are rectangular steel plate connecting flanges. There are buffers at both ends of the main beam to ensure the safe operation of the trolley on the main beam.
End beam		The end beam is located at one end of the main beam and is fixed on the main beam with bolts through flange plates. It is a box-shaped structure consisting of a U-shaped groove, a lower cover plate, a reinforcing plate and a rib formed by rolling or welding steel plates. The end beam has the characteristics of light structure, good rigidity, beautiful appearance, and good welding performance. There are buffers, and long travel limit, such protective devices.
Support leg		It is a triangular beam is weld by a support frame(welded by angle steel and other section steel) and an I-beam. The A-shaped structure increases the strength, rigidity and stability of the gantry frame. The steel plate flange between the leg and the ground beam is connected by bolts. The structure is simple, the installation is convenient, and it is convenient for transportation and storage.
Lifting mechanism		Single girder gantry crane can use chain hoist, wire rope hoist, low headroom hoist, and European style hoist; Double girder gantry crane can use LH hoist trolley, NLH European style hoist trolley, integrated hoist, and QD trolley.
Crane traveling mechanism		The crane traveling mechanism is driven separately, mainly composed of: operating motor, operating reducer, wheel set, etc. The motor adopts a soft-start motor, with its own brake, and the brake is reliable; The reducer adopts vertical gearbox to save space; LDA-type wheels, double-wheel edges, are not prone to wheel climbing and falling off.
Power supply mode for trolley and crane		The hoist power supply is the cable type, and the slideway can use wire rope slideway, I-steel slideway, and special-shaped steel slideway; The crane powersupply can be powered by a cable drum, buss bar, etc.
Control model		Can use control handle with pendant line, wireless remote control, or cabin control.
Protective device		Phase failure protection, fire limit, crane travel limit, heavy hammer limit-lifting height limit, overload limit, etc.