What is a double girder overhead crane for overhead type hoisting machinery

Double girder overhead crane.

There are three types of double girder overhead crane operation room: separated, closed and insulation.

The platform entrance of the double girder overhead crane control room is divided into three types: side, end face and top surface.

h is the added height of the trolley buffer.

There are two types of double girder overhead cranes: indoor and outdoor. When ordering, the technical requirements such as the maximum and minimum temperature of the working environment and the type of power supply should be indicated. 5.An overload limiter, a large-screen display and a variety of protection devices have been added to further increase the safety during use.

The double girder overhead crane is mainly composed of a bridge frame, a cart running mechanism, a trolley, electrical equipment, etc. According to the frequency of use, it is divided into three working levels: A5, A6 and A7. The action manipulation of the hook overhead crane is all completed in the driver.

Main parameters of double girder overhead crane:

Lifting capacity: 5 10 tons, 16 tons, 75 20 100 20 tons, 100 32 tons, 125 30 250 50 tons, 300 40 tons, 350 75 tons, 400 80 tons, 600 150 tons.

Span: m, 13-31 m.

Lifting height: 6 22 meters.

Classification of overhead type hoisting machineryOverhead cranes can be divided into three types: the first is a simple beam overhead crane, the second is a metallurgical special overhead crane, and the third is an ordinary overhead crane. The hoisting trolley is composed of three parts: the hoisting mechanism, the trolley running mechanism and the trolley frame. The lifting mechanism includes an electric motor, a brake, a reducer, a drum and a pulley block.

The motor drives the drum to rotate through the reducer, so that the wire rope is wound on the drum or lowered from the drum to lift heavy objects. The trolley frame is a frame that supports and installs components such as the lifting mechanism and the trolley running mechanism, which is usually a welded structure. The driving mode of the running mechanism of the bridge type lifting machinery can be divided into two categories:

One is centralized drive, that is, a motor is used to drive the long drive shaft to drive the active wheels on both sides; The other type is separately driven, that is, the active wheels on both sides are driven by an electric motor. Medium and small overhead cranes mostly use the "three-in-one" drive mode of brake, reducer and motor unit integration, and the ordinary overhead crane with large lifting capacity is easy to install and adjust, and the driving device often adopts universal coupling. The running mechanism of the bridge type hoisting machinery generally only uses four active and driven wheels, and if the lifting capacity is large, the method of increasing the wheels is often used to reduce the wheel pressure.

When there are more than four wheels, a hinged equalization frame device must be adopted to make the load of the crane evenly distributed on each wheel. The metal structure of the bridge is composed of the main beam and the end beam, which is divided into two categories: single main girder bridge and double girder bridge. The single girder bridge is composed of a single girder and the end beams located on both sides of the span, and the double girder girder bridge is composed of two main girders and end beams.

The main beam of the bridge type hoisting machinery is rigidly connected with the end beam, and the two ends of the end beam are equipped with wheels to support the bridge to run on the elevated frame. There is a track welded on the main beam for the crane trolley to run. There are many structural types of bridge girders, and the more typical ones are box structure, four-truss structure and hollow truss structure.

The box-shaped structure of the overhead type hoisting machinery can be divided into several types, such as the regular rail box-shaped double girder, the deviation rail box-shaped double girder, and the deviating rail box-shaped single main girder. Positive rail box-shaped double girder is a basic form widely adopted, the main beam is composed of the upper and lower flange plates and the vertical web on both sides, the trolley rail is arranged on the center line of the upper flange plate, its structure is simple, the manufacture is convenient, suitable for batch production, but the self-weight is larger. The cross-section of the bridge type hoisting machinery deviated rail box-shaped double girder and the deviated rail box-shaped single girder are composed of upper and lower flange plates and the main and auxiliary webs of unequal thickness, the trolley rail is arranged above the main web, and the short stiffener plate in the box can be omitted, wherein the deviating rail box-shaped single girder is replaced by a wide flange box-shaped girder instead of two main beams, and the self-weight is small, but the manufacturing is more complicated.

First, the nature is different.

1. Beam crane: It is a kind of crane, which is a crane composed of a bridge frame and a lifting trolley.

2. Overhead crane: It is a lifting equipment that is cross-framed over the workshop, warehouse and material yard for material lifting.

Second, the structure is different.

1. Beam crane: there are three working mechanisms: lifting, bridge walking, and trolley walking. Powered by human or electric power. It is mostly used to handle goods in factories or workshops.

2. Overhead crane: The bridge of the overhead crane runs longitudinally along the track laid on the elevated on both sides, and the lifting trolley runs horizontally along the track laid on the bridge, forming a rectangular working range, which can make full use of the space under the bridge to lift materials without being hindered by ground equipment.

Third, the application is different.

1. Beam crane: used for lifting goods in factories, warehouses, material yards and other different occasions, and it is forbidden to use it in flammable, explosive and corrosive media environments.

2. Overhead crane: This kind of crane is widely used in indoor and outdoor warehouses, workshops, wharves and open-air storage yards.

Single girder overhead cranes are used in machining, textile molds, aerospace ships, foundry steel, coal, machinery manufacturing, equipment Lachi factories, petrochemical and other workshops, warehouses, and material yards to lift goods on different occasions.

It can be used with electromagnetic chucks, grabs, and spreaders for non-standard processing, and the electric single girder overhead crane has strong general performance.

The difference between the two:

1. Girder cranes mainly include single girder overhead cranes and double girder overhead cranes, and the main beams of the single girder overhead crane bridge are mostly made of I-shaped steel or a combined section of steel type and steel plate. The hoisting trolley is often assembled by chain hoist, electric hoist or hoist as a hoist mechanism.

2. There are two kinds of bridge support type and suspension type. The former bridge runs along the crane track on the car girder; The bridge of the latter runs along a crane track suspended under the truss of the factory building. There are two types of single girder overhead cranes: manual and electric.

3. The working speed of each mechanism of the manual single girder overhead crane is low, and the lifting capacity is also small, but its own quality is small, which is convenient for organizing production and low cost. The manual single girder overhead crane adopts a manual monorail trolley as the running trolley, a chain block as the lifting mechanism, and the bridge frame is composed of a main beam and an end beam. The main beam is generally made of single I-beam.

The working speed and productivity of the electric single girder overhead crane are higher than those of the manual one, and the lifting capacity is also larger. The electric single girder overhead crane is composed of a bridge frame, a cart running mechanism, an electric hoist and electrical equipment.

Hello, happy to answer for you :

The first is generally a suspension or single beam that needs to be supported by the plant, and the bridge type is generally double girder (or multi-beam) and does not need to be supported by the plant.

So beam cranes are not the same thing as overhead cranes!

Beam crane is a more common name in the past, mainly referring to: electric single girder crane and electric suspension crane, single girder crane with suspension electric hoist as the main lifting mechanism; Overhead cranes mainly refer to: general overhead cranes, single girder overhead cranes (only seen), single girder, double girder, and multi-girder cranes with running trolley and lifting mechanism.

There is no beam crane, only overhead crane and gantry crane, simply put, the bridge type is the track on the fixed legs, the gantry crane is the track on the ground, the legs move with the main beam, it looks like a door.

There is no difference, but the name is different, generally single beam or small tonnage is called beam type, double beam or large tonnage is called bridge type, and the official is called overhead crane.

Overhead cranes, also known as overhead crane positioning, usually use a scale precise positioning system and APON wireless positioning rangefinder to accurately detect and automatically control the position to achieve intelligent reservoir management and other functions.

Single girder overhead cranes are widely used in workshops, factories, warehouses, material yards and other different occasions to lift goods, and it is forbidden to use them in flammable, explosive, corrosive media environments. The single girder overhead crane for the workshop is equipped with two operation forms: ground and control room. There are two kinds of open and closed types in the operation room, which can be installed on the left or right side according to the actual situation, and there are two kinds of side and section in the entry direction to meet the needs of users in various situations.

LD type electric single girder overhead crane produced in China. It is composed of a bridge, a trolley, a trolley running mechanism, and electrical equipment. The bridge is made up of a main beam and two end beams connected by bolts.

The main beam is an N-shaped steel bent into a steel plate, and a king-shaped beam welded with an I-beam group. The end beam is also an N-shaped steel bent into a steel plate, and then assembled and welded into a closed beam. The operation of the cart is achieved by two conical rotor motors, which drive the active wheels on both sides through the gear reducer.

The trolley is CD1 type or MD1 type electric hoist. There are two ways to operate the crane, one is to operate with a button box on the ground, and the other is to operate in the driver's cab. The main power supply of the crane is introduced by the angle steel or round steel conductor line on the side of the plant, and the electric hoist is powered by a flexible cable.

The main performance parameters of LD type electric single girder overhead crane are as follows: rated lifting capacity of 1-10t, span of 6-, lifting speed m min (slow speed, lifting height 6-30m, trolley running speed 30-75m min, trolley (electric hoist) running speed 20-30m min, the main advantages of this crane are simple bowls, light weight, low price; Bolted connection is used between the main and end beams, which is convenient for disassembly, storage and transportation; It is convenient to replenish spare parts, the building height is low, and the wheel pressure is small; It has good manufacturability and is suitable for automatic electric welding and assembly line processing. The disadvantage is that the lifting capacity is not large.

LD type electric single girder overhead crane is designed and manufactured according to intermediate work type, which is a general purpose crane, which is mostly used in machinery manufacturing, assembly workshops and warehouses and other fields. If the heavy task workshop, warehouse and small metallurgical foundry are urgently needed, this crane can also be selected by reducing the rated load by 30%.

The LD type electric single girder overhead crane is equipped with a replaceable electric grab, which forms the LL1 type electric single girder grab overhead crane, which can improve the productivity of the hook crane when it is engaged in bulk material work.

The use and parameters of the single girder overhead crane Henan Weihua Heavy Machinery SDQ-3 manual single girder overhead crane is suitable for maintenance equipment and hoisting spreader items in warehouses, workshops, power stations and other places without power supply. It can be used with manual monorail trolleys and chain hoists.

The chain hoist can be used with a variety of manual monorail cranes to form a manual lifting and transportation trolley, which is suitable for monorail overhead transportation, manual single girder overhead cranes and cantilever cranes.

Structure: HS series chain hoist adopts symmetrical arrangement of two-stage spur gear transmission.

It is suitable for the lifting and handling of objects below 20t in the workshop, and the general lifting capacity is tons, 1 ton, 2 tons, 3 tons, 5 tons, 10 tons, 16 tons, 20 tons, and the span is meters.

Bridge, running mechanism, load trolley.

First, the structure. The overhead crane is composed of several parts, such as a bridge frame, a trolley equipped with a lifting mechanism, a trolley running mechanism and a control room.

1. The bridge is the basic component of the overhead crane, which is composed of several parts such as the main beam and the end beam. That is, the cart.

The main beam span frame is above the workshop, and its two ends are connected with end beams, and the outside of the main beam is equipped with a walking platform and is provided with a safety railing.

The bridge frame is equipped with a trolley moving mechanism, an electrical box, a lifting mechanism, a trolley running track and an auxiliary slip frame.

One end of the bridge is equipped with a cab, and the other end is equipped with a main slip line that introduces power.

2. The trolley moving mechanism is composed of several parts, such as the driving motor, brake, transmission shaft, reducer and wheel.

There are two types of drives: centralized drive and separate drive. At present, the bridge crane produced in China.

Most of the machines are driven separately, which has the advantages of light weight, convenient installation and maintenance. The whole crane moves back and forth along the length of the workshop under the drive of the trolley moving mechanism. The trolley running mechanism is composed of a trolley frame, a trolley moving mechanism and a lifting mechanism.

3. The trolley frame is welded by steel plate, and it is equipped with a trolley moving mechanism, a lifting mechanism, a railing and a lifting limit switch.

The trolley can move left and right along the track on the main beam of the bridge. Buffers and limit switches are installed at both ends of the direction of movement of the trolley.

The trolley moving mechanism is composed of an electric motor, a reducer, a reel, a brake, etc. After deceleration, the motor drives the driving wheel to make the trolley move.

The lifting mechanism is composed of an electric motor, a reducer, a reel, a brake, etc., the lifting motor is connected with the reducer through the brake wheel and the coupling, and the output shaft of the reducer is connected with the lifting reel.

4. The control room is a pod for controlling the crane, also known as the cab. In the control room, there are large and small trolley moving mechanism control devices, lifting mechanism control devices and crane protection devices. The control chamber is generally fixed at one end of the main beam, and there are a few that are installed under the trolley and move with the trolley.

There is a hatch leading to the platform above the control room, which is used by personnel to get up and down when overhauling the mechanical and electrical equipment of the cart and the trolley.

5. Trolley conductive device (auxiliary sliding line).

6. The main power supply conductive device of the crane (main slip line).

7. AC magnetic control box, resistance box.

8. a track.