LH Double Girder Electric Hoist Bridge Crane

Designed and manufactured according to JB/T 3695 standard
It is used with fixed hoists like CD1 or MD1 type.
Widely used in machinery fabrication, metallurgical plant auxiliary workshop, storage, stock ground, and power station.
It is also can be used as regular double-girder overhead crane in textile industry or food industry.
But it is forbided using in inflammable, explosive or erosion environment.

√ Widely used in machinery fabrication, workshop, storage, etc.
√ Span Length: 7.5~31.5 m.
√ Lifting Capacity: 1~32 ton.

LH electric hoist bridge crane is a general purpose crane, mostly used in machinery manufacturing, assembly, warehouses and other places with low application frequency or rated lifting capacity. It is a double-girder structure bridge crane with a trolley running on the track laid on the main beam. This crane is used in conjunction with CD1, MD1 and other forms of fixed electric hoists. This crane has three operating modes: bottom surface, control room, and remote control. The control room has two types of end and side door openings for users to choose. The advantages of this crane are good stability in use, full use of the workshop, and appropriate clearance height. The disadvantages are low working level and not suitable for heavy workshops.

LH type Double Girder Hoist Crane consists of two main beams, two end carriages, lifting mechanism (electric crab hoist), motors, reducers, electrical box, power feeding system, hook and lots of safety devices (buffers, limiters).

• Widely used in machinery fabrication, metallurgical plant auxiliary workshop, storage, etc.
• Lifting Capacity: 1~32t
• Span: 7.5-31.5m
• Lifting Height: 6/9/12/18m (according your needs)
• Voltage: 220-660V 50/60Hz 3Phase
• Working Class: A3, A4, A5
• Ambient Temperature: -25~40℃

• Compact instructure, low building clearance;
• Maximize lifting height to make full use of workshop.
• Light body, and small wheel loading;
• Variable frequency speed regulation, stable travelling.

Mechanism Parts

• Double main girder, welding box beam, camber accord with National Standard.
• It is made of carbon steel with high quality of Q235B or Q345B(as Fe37 or Fe52)
• The main girder is connected by strength bolt, it can be made as centre-rail or inclined to one side;
• Metal structure use steel pretreatment process;
• Weld joint between girder cover and web is tested by X ray or ultrasonic examination;
• Crane wheel, trolley wheel and brake wheel are treated by untermediate frequency, power frequency;
• Leeb hardness tester control heat treatment hardness.

Electric Crab Hoist Trolley

• Compact structure, small size and light;
• Rail is P type or square steel rail;
• Consisted with motor, reducer, trolley shelf and hoist.
• Trolley travelling is trinity structure;
• Lifitng mechanism is similar with hoist's

Crane Travelling

• Ground control use soft starting motor with small current, no axial channeling move
• Seldom fault, can frequency starting, save energy;
• Cabin control use ZDR series cone-shape rotor, three-phase motor or electromagnetic braking mortor;
• High mechanical strength, compact structure, braking torque can be adjusted
• Starting stablely, safe braking;
• Convenient to control, use and maintance;
• Use QS trinity drive and doubel-girder hoist special wheel
• Simple device and compact structure.

Electrical Part

• Safe touch line conductive rate is high, small pressure, sliding fast.
• Electrical wiring box neat, orderly, easy to maintain and repair.
• Trolley running power is supplied by flat cable, smooth and aesthetic

Protection Device

• Outdoor cranes are equipped with lifting mechanism, electrical control box and rainproof devices;
• Trolley matched with stop block and light&power switch
• current protection , anti-collision device, sound-light alarm.

Control Mode

Cabin control and ground control optional

• Special cabin for double-girder with hoist or capsule cabin: Open version, comfortable operating; cam controller, linkage controller; Cabin has open or close style; installed on left or right; Door direction has end open, side open and top open, user can choose according to your need.
• Ground control: pendent control and remote control are available.

It is suitable for the transfer, assembly, maintenance and loading and unloading operations in mechanical processing workshops, auxiliary workshops of metallurgical plants, warehouses, material yards, power stations, etc. It can also replace ordinary double-beam bridge cranes and be used in production workshops of the textile industry and food industry. Its working type is light and medium, and the working environment temperature is -25℃~40℃. It is forbidden to use it in flammable, explosive and corrosive media environments.