QL Double Girder Bridge Crane with Carrier-beam Used in Steel Mill

QL model Double Girder Magnetic Overhead Crane could equip with hanging beam, it is applicable to use at steel mill, shipyard, port yard, storage and waste warehouse to lift and transfer steel plate, pipe, profile steel, steel bar, steel billets, steel coil, spool, iron and steel scraps, etc. different sizes of long and bulk material. The hanging beam could horizontal rotation to meet different working demands.

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Overview:

Double Girder Bridge Crane with Carrier-beam Used in Steel Mill

Double Girder Bridge Crane with Carrier-beam mainly consists of bridge, crane traveling mechanism, trolley, electric equipment and electromagnetic chuck. When used, the rotary part of the hanger of electromagnetic disk must be locked up with screws and no rotation is allowed.
This type crane is heavy duty type with working duty is A6~A7, crane lifting capacity includes the dead weight of magnetic lifters.

Main Crane Parts Information

The material of steel plate adopts Q235B, if working temperature lower-20℃ or higher +40℃,adopts Q345 steel, all steel plates are under the process of rolling, shot blasting and rust removal, then paint primer.

	Trolley	It is the lifting mechanism, lifting good up and down, travelling along the crane girder/ beam from the left side to the right side. It consist of motor, reducer, brake, drum, hook, coupling, hoist structure. We can separately supply electric crab/hoist for clients.
	Motor	The slip ring motors are used specially for crane, suitable for frequent starting , reversing & braking in accordance with ISO 9001:2000 ISO 14001:2004. Motors are totally enclosed in dust proof construction foot / flange mounted TESC / TEFC, Sq. cage motors with integrated safety brakes, insulation class F, IP54 protection for hoisting, CT & LT motions.
	Gear Box	The entire gear boxes are made of accurate hob cut helical / spur gears & pinions having hardness 250 to 350 BHN made from carbon alloy steel. All gears & pinions running on antifriction type ball/ roller bearings in totally enclosed oil bath giving constant splash lubrication. The helical/Spur gear designed for adequate strength and optimum wear resistance for smooth operation & long life.
	Brakes	Independent Hydraulic Brake make the crane much safe and easier to control
	Control box & cable	The surface of control box under anticorrosive treatment with reasonable layout and convenient maintenance. All the cables have color, number or with wire marking, which are easy to identify The jointing part of plug adopts plastic tube with insulation protection. Trolley traveling mobile power supply system adopts crane special used PVC flat cable, withstand voltage class can up to 450/750V, equipped with galvanized slide rail and cable pulley with smoothly sliding.
	Control mode	Operator cabin Wide vision, safety, comfortable Can equip with air condition, cooling fan, heater, interphone… Pendant control Easily control and no need to set professional operator Remote control Easily control and no need to set professional operator, the operator can control the crane on the ground more freely.

Features

Safety Features Of Double Girder Still Mill Crane

1. Limit Switch: Safety limit switches for stoppers will be provided to prevent over traveling in all motions.

2. Anti collision device

When several units of crane travel on the same railway, the cranes can install the following devices:

Anti-collision device,

Infrared non-contact and inductive type limit device

Sound and light alarm device

Wireless anti-collision device

3. Weight overload protection device

When the crane overload works, it equipped with weight overload protection device, includes automatic stopping type lifting weight limiter and weight display device.

4. Lifting limit switch and traveling limit switch

5. Emergency stop system

6. Electrical protection

The main insulation switch, emergency stop switch, short circuit, Zero voltage protection, zero position protection, loss of field protection, Current overload protection, over speed protection, Phase sequence protection and adopted crane specially anti- vibration contactor etc. are all equipped, fully implement safety first concept.

7. Interlock device

It sets interlock device for the cabin door and the other door from cabin into bridge structure, when the door is opened, the crane can not work.

Specification

Specifications

Capacity		t	5		10			16/3.2		20/5		32/5			50/10		74/20
Span		m	10.5~31.5														13.5~31.5
Max. Lifting Height	Main hook	m	16		16			16		12		16			12		22
	Aux hook							18		14		18			16		24
Speed	Main hoist	m/min	15.5		10.4			10.7		9.8		7.8			7.8		6.1
	Aux hook							14.6		15.5		15.5			10.4		9.7
	Trolley travelling		37.2		43.8			44.6		44.6		42.4			39.3		33.8
	Crane travelling		92.7	93.7	92.7	93.7	86.5	76	89	76	89	89	75.3	75.3	75	76.6	67.3
Motor	Main hoisting	Kw	15		22			37		45		55			75		90
	Aux hoisting							11		15		15			22		37
	Trolley travelling		1.5		2.2			3.7		3.7		7.5			11		15
	Crane travelling		2× 5.5	2× 7.5	2× 5.5	2× 7.5		2× 7.5	2× 11	2× 7.5	2× 11	2× 11			2× 11	2× 15	2× 22
Power supply		3-phrase 50HZ 220V~480V according to your requirements
Working Environment		The temperature of working environment is -10~+60° C; The relative humidity is no more than 50% when the temperature is +40° C;

QL Double Girder Bridge Crane with Carrier-beam Used in Steel Mill