Overhead Bridge Double Girder Single Beam Eot. Crane Electric Hoist Lifting Machine

• Customization: Available
• After-sales Service: Provide
• Warranty: Full
• Model NO.: HC Type Electric Hoist
• Certification: GS, CE, ISO9001, SGS
• Condition: New
• Operation Form: Cabin
• Maximum Lifting Height: 20-25m
• Maximum Lifting Weight: 20-50t
• Main Girder Form: Single Girder
• Type: Beam
• Span: 10-20m
• Lifting Speed: 3-20m/Min
• Transport Package: Bulk
• Specification: CUSTOMIZED
• Trademark: KUANGYUAN
• Origin: China
• HS Code: 8426193000
• Production Capacity: 100000
• Package Size: 2000.00cm * 2000.00cm * 4000.00cm
• Package Gross Weight: 3000.000kg

Product Description

Mast cranes

Mast cranes are a type of simple crane that is difficult to move and requires the installation of a large number of guy ropes to maintain stability for lifting and installation. It is simple to make, easy to assemble and disassemble, and can be used in relatively narrow conditions. The lifting capacity can be large or small, with the larger ones reaching over 100kN. It can lift special structures and major structures that are difficult for other lifting machinery to lift. It has a small working radius and is not easy to move, making it suitable for projects with relatively concentrated hoisting volumes.

Specification

Applications

There are many types of cranes. Mast cranes are generally made of wood or steel. This type of crane features simple manufacturing, easy assembly and disassembly, large lifting capacity and is less restricted by the construction site. Especially when hoisting large components and there is a lack of large-scale lifting machinery, this type of lifting equipment shows its superiority even more. However, this type of crane requires a large number of guy ropes and is difficult to move. In addition, its lifting radius is small and its flexibility is poor. Therefore, mast cranes are generally used when the components are heavy, the hoisting projects are concentrated, the construction site is narrow, and there is a lack of other suitable large-scale lifting machinery.

Pull the pole on one foot
One-legged pull rods are classified into: wooden one-legged pull rods, steel pipe one-legged pull rods and lattice one-legged pull rods.
The one-legged puller is composed of a puller, a hoisting pulley block, a winch, guy ropes and anchors, etc. Among them, the number of guy ropes is generally 6 to 12, and at least no less than 4. When lifting, keep the pull rod at an Angle of no more than 10°. The movement of the one-legged puller is carried out by the crowbar at its bottom. (The erection of a one-legged pole

Key Configurations

Herringbone pole pull
The herringbone pull rod is generally made by binding two round logs or two steel pipes with steel wire ropes or hinging them together with iron parts. Its advantage is that the lateral stability is better than that of the one-legged pull-out, and fewer guy ropes are used, but the range of movement of the component after lifting is small. The bottom of the herb-shaped pull rod is equipped with a pull rod or pull rope to balance the horizontal thrust. The Angle between the two rods is generally about 30°. When lifting with a herb-shaped derrick, the derrick tilts forward and there are two guy ropes at the back. To ensure the stability of the bottom of the pull rod during lifting, a guide pulley is installed at the bottom of one pull rod. The lifting cable is connected to the hoist through it and then connected to the anchor with another steel wire rope.
Round log herringbone pull rods, lifting capacity 40-140kN, pull rod length 6-13 meters, small end diameter of round log 200-340mm. Steel pipe herp-shaped pull rod, lifting capacity 100kN, pull rod length 20m, outer diameter of steel pipe 273mm, wall thickness 10mm; The lifting capacity is 200kN, the length of the pull rod is 16.7m, the outer diameter of the steel pipe is 325mm, and the wall thickness is 10mm.

right elevation

left elevation

front elevation

Technical Specifications

(Custom configurations available upon request.)

Model	EX200	EX300	EX400
Operating Weight (kg)	20,000	30,500	45,000
Engine Power (kW)	110	165	220
Bucket Capacity (m³)	0.8–1.2	1.2–1.8	1.8–2.5
Max Digging Depth (m)	6.2	7.5	8.8
Max Reach (m)	9.5	11.2	13.6
Fuel Tank (L)	350	450	600

After Sales Service

Cantilever pull rod
The cantilever pull is made by installing a boom in the middle of a one-legged pull or at two-thirds of its height. Its characteristics are a relatively large lifting height and radius, as well as a large swing Angle of the boom. However, this type of crane has a relatively small lifting capacity and is mostly used for hoisting light components. The boom can also be installed on the derrick to become a derrick pull rod.
Cable-pulling mast crane: It is made by installing a rotating and undulating lifting rod at the lower end of a single-legged handle rod. It has a large lifting radius and is highly maneuverable and flexible, making it suitable for structural hoisting in heavy industrial buildings. 

Company Profile

Henan Mine Crane Co., Ltd.

The basic structure of the mast
Broadcast
Editor
The mast crane is composed of a metal structure, a lifting system, a stabilizing system and a power system.
Metal structures include masts, bases and their accessories, etc. It is the physical entity for hoisting equipment or components and transferring the weight of the hoisted equipment or structure to the foundation. As shown in Figure 1.

The function of the hoisting system is to lift the equipment or components being hoisted. It is mainly composed of pulley blocks, guide wheels and steel wire ropes, etc.
The function of the stabilization system is to stabilize the mast, which mainly includes guy ropes, ground anchors, etc.
The function of the power system is to provide power for the mast crane. The commonly used ones are mainly electric winches, and hydraulic devices are also used as lifting power

Mast cranes are non-standard cranes, generally used in situations where the on-site environment is restricted and other cranes cannot perform lifting operations.
(1) Basic Structure and Classification of Mast Cranes
The structural components of a mast crane include: the mast body, the hoisting system, the stabilization system, and the power system
Mast body: mast, base and its accessories.
Masts are classified into lattice type and solid-web type (generally steel pipe) cranes according to their structural forms.

Calculation of the tension of guy ropes and selection of guy ropes
The guy rope is the stabilizing system of the mast crane, which is related to the safety of the crane and affects the axial force of the mast. The tension of guy ropes is divided into working tension and initial tension.
The initial tension of the guy rope
The initial tension refers to the force by which the guy [3] rope is pre-tightened when the mast is not in operation. The initial tensile force should be 15% to 20% of the working tensile force.
2. The working tensile force of the guy wire
The working tensile force refers to the load borne by the guy wire when the mast crane is in operation.
In the correct arrangement of guy ropes, there is always one guy rope located within the vertical plane determined by the hoisting vertical line and the mast axis. This guy rope is called the "main guy rope".
3. Basic principles for selecting guy ropes: All guy ropes must be selected as the main guy ropes.
When choosing guy ropes, the sum of the working tension and the initial tension of the main guy rope is taken as the basis.
T=Tg+Tc
In the formula: Tg - the working tensile force of the main guy rope;
Tc - The initial tension of the main guy rope.