Technical description to the offer

Portal crane with a lifting capacity of 16/32 tons x 33/21 m,

with a gantry gauge of 10.5 m,

designed for mixed operation

with hook and grab

Gantry crane capacity 16/32 t x 33/21 m

General information about the portal crane

The proposed portal crane in its technical design corresponds to the results of the latest technical developments of GANZ specialists and covers all the latest technical solutions that have been achieved at GANZ on the basis of many years of experience in the construction of portal cranes and which have largely justified themselves in crane building practice. Since the gantry crane by its design is a rather complex lifting and transport machine, both mechanically and electrically, it is therefore of particular importance that the choice of equipment components used in the construction of the gantry crane is also based on relevant references.

Portal crane components are designed in accordance with the current FEM regulations, and the manufacturing of its components and the materials used for the construction of the crane comply with the current EURO and ISO standards and standards. As a result, the gantry crane complies with international regulations in every respect, irrespective of where it is installed and mounted.

The gantry crane, thanks to the selected speeds of its mechanisms, in comparison with the order of its main technical data, is ready to achieve high performance in reloading goods. The portal crane, thanks to the modern non-contact adjustable drives used in its electrical equipment control system for all crane mechanisms, works in the absence of shock loads that usually occur in such lifting and transport devices.

Power supply system and return of excess electricity to the network (recovery system) allows for internal power transfer, which means that the system's braking energy is converted to electric drives, so much less power needs to be taken from the mains.

Thanks to all this, the service life of the portal crane is significantly increased, the degree of wear of individual elements of the crane is minimized, since mechanical braking of individual crane mechanisms is practically eliminated. This kind of design of the portal crane allows it to be operated very economically, it also provides the possibility of convenient operation and maintenance, while achieving high performance in reloading goods.

The ground runway of the gantry crane consists of conventional railway rails, according to the chosen gauge of the gantry.

The supply of electric current to the portal crane is carried out, as usually advisable, from the coastal power supply column through the supply cable of the crane with a length of 50 meters, through a cable drum equipped with a counterweight device, which corresponds to the possibility of removing the crane movement mechanism by a total of 100 meters (or 50 m to each side).

Technical data of gantry crane

Geometrical dimensions and its technical data, in accordance with the design solutions of the technical design of the crane, are contained in the drawing for proposal

Drawing No. DAj-807-1 46 0

The gearbox used in the lifting mechanism of the portal crane has the ability to switch speed, due to which it is able to operate in two modes of operation, with a mode of 16 tons up to an overhang of 33 m, and in a load capacity of 32 tons up to an overhang of 21 m, of course, at the last value of the load capacity lifting speed will be halved.

This gantry crane is designed for mixed duty operation, i.e. it is designed for both hook and grab operation.

The operating mode with a load capacity of 32 tons refers only to the hook operation mode, while it is also possible to reload container cranes suspended on a hook on a special frame for reloading containers, reloading is allowed only within the specified load capacity.

In the mode of operation with a grab, it is possible to operate a crane using grabs of various sizes and capacities, depending on whether bulk and bulk cargo is handled with what volumetric weight during crane operation. (For example: when handling gravel, the volume of the grapple is approx. 6 m3, when handling coal – 8.5 m3, when handling grain – 10 m3).

Main technical data of electric gantry crane:

Lifting capacity 16 t for outreaches from 9 to 33 m

32 t for departures from 9 to 21 m

Lifting height in hook mode 24 m above the level of the rail head

in clamshell mode 22 m above the level of the rail head

Lowering depth 15 m below the level of the rail head

Portal gauge 10.5 m

Crane supply voltage 3x400 V, 50 Hz, + 0 wire or

grounding

Data for individual crane mechanisms

Lift mechanism 2x100 kW, 60/30 m/min, adjustable

from 0 to nominal value,

Luffing mechanism 28 kW, 50 m/min, adjustable from

Swing mechanism 2x31 kW, 1.5/min, adjustable from

zero to nominal value

Movement mechanism 4x10 kW, 26 m/min, adjustable from

zero to nominal value

Structural weight of portal crane 250 tons

The weight of the used counterweights is 42 tons

Gantry crane total weight 192 tons

Crane metal structure

The load-bearing metal structure of the gantry crane is mainly designed and built from box-shaped (closed) welded structure elements, using rolled steel with good weldability, with a tensile strength of 38 kP/mm2. The design of the portal crane allows the passage under the portal in accordance with the gauge of the portal for two railway cars, taking into account the clearance of the train buildings. From the upper plane of the portal rises the so-called non-rotating crane column located in the middle. At the head of the column there is a thrust bearing ring, through which all loads are transferred from the rotary part of the crane and from the load suspended on the hook. The so-called rotary column of the portal crane has a similar design, on the rotary part of the crane there is a so-called electrical unit, which includes the engine room of the crane and electrical equipment.

The crane control cabin adjoins the electrical unit, the crane hauling system and the mechanism for changing the crane outreach are located in the upper part of the crane column.

The connections of the metal structure nodes required at the site of the crane installation are carried out by bolted connections. In the part of the supporting structure, high-strength bolted joints are used to connect the nodes of the metal structure, with appropriate preparation of the connecting surfaces before connecting the nodes (achieving the required surface roughness). In addition, part of the components of the metal structure of the crane, primarily at the boom device of the crane, is connected by pin connections.

The design of the crane boom device is also a box-shaped structure, in its design it is an articulated three-link (articulated strut). The metal structures of the crane include ladders, platforms and ladders used for the purpose of convenience in the care and maintenance of portal crane units, in the design of which the norms and standards "EN" (European standards) were also largely taken into account, in accordance with which the ladders, platforms and stairs for passage are equipped with gratings for passage in non-slip design, the design of the gratings also allows the possibility of removing precipitation and cleaning from dust.

The entire metal structure of the crane is provided with appropriate corrosion protection and coated with corrosion-resistant paint, which also complies with the current norms and standards "EN" (European norms), in accordance with the operating conditions of the portal crane components in the open air. Corrosion protection of assemblies includes preliminary preparation of the surfaces of the finished metal structure by shot blasting and subsequent application of an immediate layer of primer paint based on zinc dust, application of an intermediate layer of epoxy-based paint and application of two layers of opaque, final paint. In total, layers of paints only 220-240 microns thick are applied to the elements of the metal structure of the crane.

Crane mechanical equipment

The mechanical equipment of the gantry crane is designed and manufactured in accordance with the operating conditions and on the basis of the loads that arise during the operation of the individual mechanisms of the gantry crane, and the mechanical equipment, of course, satisfies the current FEM regulations regarding the safety factors of the equipment.

The crane lifting mechanism is located in the crane engine room. A separate disc brake is also installed between the drive motor of the mechanism and the gearbox, which is designed to provide further safety when stopping the movement of the lifting mechanism. Rope blocks of the lifting mechanism are also equipped with a device to prevent the rope from jumping out of the block stream, which is also considered as an additional safety device for the lifting mechanism. IN

As a further protection of the lifting mechanism, an electrical signal is taken from the limit switch of the rope drum of the lifting mechanism (the so-called "End Coder"), which ensures that the movement of the load is stopped during the operation of the lifting mechanism when the end position is reached (a limit switch equipped with a drive device is used).

The gantry crane slewing mechanism is located and can be serviced from a platform adjacent to the fixed column at the level of the thrust bearing rim, and is equipped with a drive motor built-in with a brake. The thrust bearing toothed rim is driven in two places diagonally by a planetary gear mounted on the shaft of a gearbox built together with a drive motor. This is an open transmission, allowing for easy access and control of the node, the design, of course, also provides for the possibility of setting (adjusting) the node.

The crane luffing mechanism is located in a separate small engine room, located in the upper part of the column, the drive of this unit is also carried out from a gearbox connected to a drive motor built-in with a brake. The luffing mechanism itself is a rack and pinion, which is usually a good, proven technical solution for GANZ portal cranes.

Travel mechanisms are placed under the four legs of the crane portal and there is one drive mechanism under each leg of the portal. The box-shaped structure of the crane bogies is connected to the gantry legs through a balancing device, thereby ensuring the possibility of transferring the load from the gantry legs and its uniform distribution over the crane gantry wheels. The drive of this mechanism is also carried out from a gearbox connected to a drive motor built with a brake. The crane trolleys are equipped with electric rail anti-theft grippers, which are also crane safety devices, since they prevent the crane from moving when it is not in working condition.

Description of the electrical equipment of the crane

All gantry crane drive motors are heavy duty three-phase asynchronous squirrel-cage crane motors.

The gantry crane drive mechanism is an adjustable AC drive using frequency converters. The frequency converter converts the three-phase supply current into a rectified DC voltage, achieved by applying pulse-frequency modulation, and converts it into a three-phase voltage with adjustable voltage and frequency to power electric motors. In the case of a continuous main signal received from a remote sensor with a potentiometer built into the controller, the output signal of the frequency converter and with it the rotational speed of the electric motor connected to it can practically be set and adjusted (adjusted) steplessly, practically between zero and nominal values.

The crane uses types of frequency regulation on the system both in closed and open circuits. In the mechanism of lifting, grab, turning and changing the reach of the crane, thanks to the feedback provided by the installed pulse sensor, frequency regulation is carried out regardless of the load. In the drive of the crane movement mechanism, using the own regulation of the frequency converter, regulation is carried out in an open loop.

If it is possible to regulate the rotational speed without losses, the start-up and braking of the entire system of crane mechanisms is carried out without the occurrence of current and mechanical shocks and shocks, which increases the entire service life of the crane and its mechanisms, data on acceleration and deceleration, maximum current loads can be programmed to values optimal limits.

The frequency-controlled crane drives use the so-called inverter control system, i.e. all crane drives are controlled via a common module for input and output of energy back to the network.

The input of the input and output module back into the network, which consists of two high-power frequency converters, receives a three-phase supply voltage through the corresponding protection and switching devices through the choke, which is rectified by the device and the energy of the so-called intermediate circuit is absorbed and stored by high-power capacitors.

The rectified DC voltage, which appears on the so-called intermediate circuit, is fed to the inverter inputs of the individual crane drive units. Inverter devices related to a particular crane mechanism interrupt this DC voltage, and convert it for drive motors into AC voltage with amplitude and frequency, in accordance with the main signal.

Through the DC buses connecting the drive devices to each other, an internal energy exchange is also possible, thus, with the coordinated operation of the electric drive devices, for example, the drive in the generator mode is able to feed the electric drive devices without removing additional voltage from the network. The surplus of electrical energy, released during the braking of mechanisms, can be diverted back to the supply network through a common module for input and output of energy into the network. Semiconductor devices of drive mechanisms are powerful devices, resistant to mechanical loads, equipped with their own housing devices of industrial design, and in accordance with the latest state of the art.

The gantry crane uses frequency converters from "CONTROL TECHNIQUES UNIDRIVE", or frequency converters of a similar technical level, which, in order to achieve the required power levels, can work together and in parallel with balanced currents.

The control system of the power supply module and the return of energy to the network - through an adjacent 3 kHz filter - provides a sinusoidal shape and a Watt character of the current received from the network or given to the network. This solution also makes it possible to achieve a braking torque greater than the acceleration torque. From the point of view of the supply network, this solution is ideal. Particularly advantageous in the application of this system is the absence of critical braking resistances.

Programming and control of frequency converters is carried out through electronic devices installed in the electrical system of the crane. The special settings required for individual crane actuators in accordance with the requirements of a particular actuator are set and configured at the factory by the equipment supplier, so it is no longer necessary to change these settings during operation of the crane. The complex logical control system of the crane is processed by a programmable electronic logic control system (PLC), which contains in its system, in addition to analog signals of controllers, digital signals for monitoring the parameters of blocking and limitation of extreme positions, etc., and the PLC system issues control commands in accordance with logical connections programmed into her memory. The PLC system consists of analog and digital input and output modules mounted on a central unit, a power supply module, and switching relays. The input-output cards of the PLC system have their own LED indicators for troubleshooting the system.

The system uses reliable compact devices from Moeller's series PS series or compact devices of a similar technical level, in accordance with the principles of a decentralized automation system.

Thanks to such a system, with sufficient complexity of the system, simplicity in their maintenance and care is ensured, the costs of diagnosing devices are minimized. Such a construction of the system implies the possibility of communication of the installed elements of the system using a high-power connection, which in

system in use is carried out by means of the BUS communication system.

Compact controllers used as "MASTER" are supplemented as "SLAVE" by external modules and local add-ons.

To indicate these operating modes and indicate possible system errors, a touch indicator device and an operator panel have been developed specifically for this PLC system, which are installed on a crane, mounted on a console attached to the right control panel, thereby providing convenient system maintenance.

The crane control cabin is attached to the swing frame in such a way as to provide the crane operator with an excellent view of the area served by the crane when performing lifting operations. The control cabin has glazing all around, as well as in its lower part and partly on the cabin roof, which also improves visibility for the crane operator.

In the crane control cabin there is a control panel, built-in together with the crane operator's seat, on the control panel the control devices are placed, based on the conditions of their convenient maintenance and good visibility. The console also houses the operator panel and PLC system devices. The control of individual crane mechanisms is carried out by a joystick type handle, the control of individual crane movements (direction and speed of movement) is carried out depending on the installation of the handle in a position at different angles.

When the control handle is set to the zero position, electrical braking always occurs and the brake installed in the engine performs the function of braking and fixing the mechanism. In accordance with the above, the control of the portal crane does not cause physical stress for the attendant (crane operator), at the same time, with convenient maintenance and control of individual crane mechanisms, it provides the ability to quickly and easily perform lifting operations.

The power supply of the portal crane and its connection to the coastal power supply system requires the presence of a coastal power supply column.

Required crane supply voltage: 3x400 V, 50 Hz, + neutral wire

Current according to electric power: 630 A, power supply current

A single-row cable drum is placed on the crane portal, the required cable tension and end positions are provided by the design of the cable drum counterweight. The single-row cable reel itself allows the cable to be wound on the reel in an orderly manner. Through the current collector of the cable drum, the power supply voltage of the crane enters the electrical sectional cabinet located on the portal, from where the voltage is transmitted through a rotating ring current collector to power the crane.

The crane has a lighting system, the network of the lighting system through double-wound transformers is connected to the crane power supply system.

Crane lighting voltage: 220V, 50Hz

The crane lighting system is designed in such a way and the devices are arranged in such a way as to provide good illumination of electrical equipment, mechanical equipment in the engine rooms and on the crane, and also provide convenient conditions for the passage of the crane by external lighting equipment, in addition, powerful spotlights are used on the crane to illuminate the person served by the crane territory.

The cables used to connect the electrical equipment of the crane, laid in a fixed position, are made in plastic insulation, and in conditions where a flexible transition is required, flexible cables with rubber insulation are laid. For laying cables, a system of open cable routes made of galvanized material is used. The cables used on the crane are designed for 1000 volt insulation, except for the special cables used. Screened cables are used at the prescribed locations for frequency control devices. The same cables are used for the elements of perception and sensitivity (pulse sensors, force-measuring cells).

Crane safety system

Load Limiting and Load Sensing System

To limit the overload of the lifting mechanism on the crane, an electronic load limiter device is used. The lifting function serves to inform the crane operator about the process parameters of the lifting operation.

The OGP device consists of the following main units:

force measuring element

Instrumentation amplifier

Central signal processing unit

Display device

The role of the central data processing unit and display device is performed by the PLC system and the operator panel.

On the operator panel, the personnel serving the crane (crane operator) can continuously control the value of the load lifted by the crane.

The load cells are placed in such a way that the forces acting on them are always proportional to the loads that occur in the crane ropes.

The load limiter also activates the optical and acoustic (sound) indication system.

To evaluate the measurement results of the load limiter, the system is equipped with two comparator outputs (comparison devices), the indication level of which can be separately adjusted.

The first level is equipped with a programmable response time setting system to eliminate unwanted responses due to sway.

In case of reaching an overload, the control system of the OGP disables all movements of the crane mechanisms, except for the possibility of lowering the load to the ground.

To measure the wind pressure, the crane is equipped with an electronic anemometer equipped with a vane device for sensing wind pressure, with the ability to adjust to issue an alert and command signal of two levels. On the indicator device of the device, the actual value of the wind pressure can be controlled.

In the interests of safe operation of the portal crane, the following safety and alarm devices are used on it.

Mechanical protection

Electric rail anti-theft device

Limiter against rope jumping out of rope sheaves

Crane electrical protection devices

Touch protection system

Overcurrent protection system

Short circuit protection

Zero voltage protection

Internal lightning protection

Crane overload protection

Zero position protection for controllers

Emergency switches

Protection against start-up in the closed state of rail anti-theft grippers

(movement mechanism, portal)

Limit switches

Limit switches for the upper and lower limit positions of the load

The end positions of the largest and smallest reach of the boom

Collision limiter for two cranes traveling on the same crane runway

Measuring devices used on the crane

Voltmeter

Ammeters

Anemometer for measuring wind pressure

Load meter (load limiter)

Crane alarms

Sound and light alarm when moving the crane

signal horn

signal siren

Display device (display) and operator panel on the crane control panel (for the purpose of the function of checking modes and operating parameters, indicating errors and system malfunctions).

The gantry crane has the form of a special crane, the swivel platform of which is mounted on a high pedestal, and the movement mechanism itself moves along rails. Such devices are often used in shipyards, as well as in ports and ship docks. The basic principle of operation of cranes is to capture and move large-scale cargo. The gantry crane itself consists of legs, as well as a head. The crane in the port is capable of lifting and moving large-scale cargo weighing from 5 to 300 tons.

Portal crane device

The gantry crane has a base with a driving mechanism that can rotate around its axis. Since this type of lift is capable of performing various functions, namely the movement of various types of goods, it can be equipped with various types of grips, such as a hook or a clamshell grip. Depending on their location and functions, cranes can be construction and assembly. This kind of equipment has a lot of positive characteristics, and is also easy to move from place to place.

Types of portal cranes

Portal crane is of several types and varieties, each of them has its purposeful purpose.

The dock crane, in comparison with similar models of cranes, has a rather low lifting capacity, which in many respects does not correspond to its intended purpose. This crane is anti-tilt and has anti-angle grips.

The transfer crane is capable of lifting more weight than the previous one, namely about 30 tons. In some cases, such a lift can be equipped with a special magnet (for lifting metal parts), as well as a hook or grab (for moving bulk cargo). On such a crane, in most cases, there is a winch or several to insure the transported cargo.

The assembly crane is used in ports, as well as in ship repair or shipbuilding enterprises. Outwardly, such a crane is almost identical to the previous one, only it is capable of lifting loads, the mass of which can reach 160 tons, several winches are also used for insurance.

Characteristics of cranes

The crane located in the port, as a rule, has several working mechanisms. The mobile mechanism of the crane is the installation function, and all the others are working mechanisms. Depending on the installation location, cranes are divided into various types according to their application, they can perform both the function of overloading and the function of supporting and capturing large-scale cargo. The mobile mechanism is a set of carts, which, in turn, can be driven and non-driven types. The cranes used in the port are very light and economical, they are also able to withstand the lowest possible temperatures, namely up to -45 degrees. Regardless of their intended purpose and name, such cranes are often used in the oil and gas industry, as well as in the forestry and coal industries. The outreach of the gantry crane can be up to 40 meters.

The characteristics of portal cranes are reflected in the direct name of this crane. For example, the portal crane "Ganz 5/6-30-0.5" has the following characteristics:

• hook capacity, depending on the reach, smoothly changes from 5 to 6 tons;
• maximum reach - 30 m;
• portal gauge 0.5 m.

It would be advisable to use this lift in construction and agriculture, since its carrying capacity is not so large.

Types of gantry cranes

Depending on the conditions of use, cranes are divided into two types - these are floating and coastal. Floating cranes are used directly on the water and are the same vessel, only with a lifting mechanism. Portal cranes, the technical characteristics of which involve the elimination of breakdowns and accidents that occurred in the water area, as well as near land, are floating.

Shore cranes include all those located on land, regardless of whether they are located in a port, dock or shipyard. Such cranes are used to lift all types of cargo, reaching a weight of 300 tons.

Manual gantry crane KR2 or a removable rail hoist is the optimal solution for lifting and moving goods along the railway track. Gantry crane KR2 is a compact and reliable lifting mechanism that allows you to hook rails and move them along the railway track. The latest modification of the traveling crane KR2 is designedfor moving all types of railsduring travel work.

JSC Kubanzheldormash has been producing track tools and various small-scale mechanization equipment for 30 years, which not only drastically reduce the cost of track maintenance, but also greatly facilitate the work of track workers. Our portal manual crane has come a long way and has undergone many design changes - KR, KR-1, KR-1M, KR-2, KR-2M, KR-2, KR2 each new model was more perfect, safer and more convenient for work, more powerful and took into account the opinion of many operating workers from all over the country. The removable manual gantry crane KR2 today is an indispensable hoisting mechanism for the current maintenance of the track at Russian Railways and all subsidiaries (directors, branches, divisions). Reliable and inexpensive rail hoist KR2 is designed for replacement and transportation of volumetrically hardened and non-hardened rails of all types, including the most used R50, R65, R75. We produce gantry cranes of the KR series for both the 1520 mm railway gauge and the "narrow" European gauge 1435.

Railway workers use the KR2 rail hoist when replacing worn rails with new ones; mobile, equipped with electrically insulating wheels, manual cranes KR2 allowdo not violate the light signaling of semaphores, auto-blocking signals during work, quickly move the rails along the railway track, facilitating the work of the railway workers, saving money and time.

Small rail-mounted cranes KR are mainly used for small local track repair, which consists in replacing one or two rails. In addition to the portal crane, a large number of mechanized track tools are used in such works, and manual cranes are used only to support the general front of track work “in the window”. During the construction of a new railway track or during the overhaul of old railway lines, workers of steel lines use heavy self-propelled track machines, railway cranes on their own, which are characterized by high productivity and, accordingly, high costs. That is why cost-effective in local repairs, gantry cranes KR2 for rails of all types will always be an integral part of the track crews in the maintenance and current repair of the railway track.

Scope of manual gantry crane KR2

Gantry crane KR2 is designed for lifting and moving rails along the railway track with a width of 1520 mm during the current maintenance, repair of the track and replacement of rails. It is designed for changing and transporting rails of the P50, P65, P75 type. As a standard, a gantry crane is operated by two workers during track work.

With a rail length of up to 12.5 meters, as a rule, one gantry crane is enough; if it is necessary to replace a rail over 12.5 meters, it is recommended to use 2 manual cranes. Practice shows that the working load-lifting set consists of two KR2 cranes, which provides an efficient and inexpensive way to conduct track work without the involvement of heavy track equipment. Thus, the use of portal cranes KP2 allows railway workers to significantly reduce the cost of local track repair.

To the venue work on the repair of the track, the manual gantry crane is delivered by automobile flying cars, or railcars, railcars or track machines. In the place of local work on the current maintenance of the track, the cranes easily move along the rails. When self-transporting a traveling crane of the KR series, it is necessary to escort signalmen.

Design features of the manual gantry crane KR2

The KR2 mobile rail hoist consists of a powerful metal frame and a lifting mechanism.On the upper beam of the frame located above the rails,the carriage moves, which is a lifting mechanism with a chain and reducer . At the end of the chain there is a rail clamp, the so-called "pincers", which cling to the rail and hold it firmly. Via gearbox the rail rises to the desired height,to move the rail inside the frame, a transverse movement handle is installed and further rail transported to the required distance.

The main features of the Kuban traveling gantry crane are a gearbox removed from the working (lifting) area and a braking device that securely fixes the movement of the carriage andretractable heel allowing work outside the track. All this allows to exclude accidents and falling loads. It is also important that in the production of gantry traveling cranes for changing rails of the KR series, we use electrical insulation of the wheels from the crane frame, this eliminates any possibility of interference with the automatic blocking signals of the railway track.

Advantages of the manual gantry crane KR2 manufactured by Kubanzheldormash JSC:

Strong and reliable frame

Stable operation at temperatures from -40 to +50 degrees Celsius

Maximum safety at work

Ease of use

Retractable additional support

Low prices from the manufacturer

• Always in stock

Specifications of manual gantry crane KR2

1 - frame; 2 - wheel; 3 - carriage; 4 - capture; 5 - reducer; 6 - handle for moving the carriage; 7 - brake device of the mechanism for moving the carriage; 8 – retractable additional support; 9 - support lock; 10 - folding handle for carrying the crane; 11 – drive chain of the carriage movement mechanism; 12 – mechanism for tensioning the drive chain; 13 – lamellar cargo chain; 14 - ratchet mechanism with friction brake; 15 - handle for raising and lowering the rail.

Why is it necessary to buy gantry cranes for track work in Armavir?

For several decades, we have been producing portable and reliable cranes for railway workers, which have passed the test of time in the Ministry of Railways and Russian Railways. We invested heavily in the technical update of the crane design, made many changes, taking into account the wishes and comments of the railway workers. Unfortunately, there are many copies or “analogues” of our design on the market today, but when accidents or serious breakdowns occur, for some reason everyone turns to us, because nameplates and stickers fly off, and the idea that manual cranes for rails makes The "Kuban" of all railwaymen sits deep.

Choose wisely the Russian manufacturer of the KR2 manual crane, because rail hoists should serve for a long time and with high quality without breakdowns and complaints.

Mobile rail lifts from Kubanzheldormash JSC are:

• Always in stock at the factory
• Impeccable quality and durability of the frame and all mechanisms
• The best low prices for cranes and rail hoists of the KR series
• Technological and production capabilities allow to produce up to 600 cranes per month
• 100% warranty and post-warranty service
• Delivery of spare parts to any point of the Customs Union within 5 working days
• Russian manufacturer of portal gantry cranes, support the domestic manufacturer!

If you decide to buy or order KP2 manual gantry cranes, all you need to do is contact the marketing department.

A gantry crane is a complex hoisting and transport machine, the design complexity of which is determined by the complexity of technological operations and increased requirements for the accuracy of execution and operation of the crane.

Figure 3.1 - Portal crane. General form.

1-way trolley;

3-support rotary device;

4-fixed counterweight;

5-cabin management;

6-cabin for mechanisms;

7-mechanism for changing departure;

8-movable counterweight;

10-hard guy;

12-shift working equipment;

3.2 Classification of portal cranes according to their purpose

According to their functional purpose, portal cranes are divided into: reloading, assembly, construction, shipbuilding (Fig. 3.2)

Figure 3.2 - Block diagram of the classification of portal cranes

3.3 Portal cranes

Port cranes. The lifting capacity of cranes used in ports for loading bulk cargo ranges from 1.5 to 20 tons. With a carrying capacity of more than 3 tons, they are usually supplied with interchangeable equipment - grabs for handling bulk cargo and hooks for handling piece cargo. For cranes with a lifting capacity of up to 3 tons, inclusive, the use of grabs is very limited, they are mainly used to supply coastal and river ships with coal. Therefore, in order to simplify the lifting mechanism, such cranes are usually made only with hooks. For specialized sea berths with large amounts of bulk cargo, it is advisable to use grab cranes with a lifting capacity of up to 25 tons.

Port cranes usually have a constant lifting capacity on all outreaches. Depending on the width of cordon warehouses and serviced vessels, port cranes have a maximum reach of 15 to 40 m (and 30 m is usually 25). The minimum overhang is taken from design considerations. In order to serve the largest area from one crane installation, one should strive to have this overhang as short as possible. The gauge of the portal (the distance between the axes of the crane rails depends on the number of railway tracks blocked by the portal. Usually, the portals are made single-track, three-track, double-track and. In some cases, the portals are replaced by L-shaped semi-portals, in which the horizontal frame of the metal structure on one side rests directly on the undercarriages, rolling on crane rails laid on the supporting structures of cordon warehouses (Fig. 3.3) or on special flyovers.

Figure 3.3 - Semi-portal crane

at different levels (Fig. 3.4). This makes it possible to bring the axis of rotation of the crane closer to the ship being unloaded, without resorting to the construction of expensive massive embankment walls. With large fluctuations in the water level in the river during floods, the undercarriages running along the lower rail and part of the metal structure of the semi-portal often work under water.

The turning part of the crane on a single-track portal is installed in the middle of its span; on a double-track portal, it sometimes shifts to one of the crane rails, depending on the operating conditions of the crane. The rotary part of the crane on a three-way portal is sometimes movable, which increases the serviced area, but complicates the design of the crane.

Due to the high cost of the construction of crane runways and embankments, the pressure on the running wheels of cranes is usually limited to 20-30 tons. Depending on this pressure, the number of running wheels is determined.

Figure 3.4 - Portal crane on a semi-gantry of a special design

Possibilities of using gantry cranes for a wide range of operations:

▬ transshipment of piece cargo with the help of a cargo hook;

▬ work with heavy loads;

▬ bulk cargo handling with a grab;

▬ work with a magnet;

▬ handling of scrap metal using a rectangular grab;

▬ handling of containers using a spreader.

Cranes with a bunker (cranes of the "kangaroo" type) on the portal (Fig. 5) are used to unload bulk cargo from ships with a stable cargo flow.

Rotation is eliminated from the crane's duty cycle, thereby increasing productivity. The movement of the grab from the hold to the bunker and back is provided only by the mechanisms for lifting and changing the departure. From the grab

Figure 3.5 - Portal cranes with a bunker (kangaroo type)

the cargo is poured into the bunker and delivered to the warehouse by conveyors, one or two of which are mounted on a crane. The dimensions of the bunker in plan, taking into account the rocking of the grab on the ropes, are significant. To reduce swinging, the length of the suspension should be as short as possible. When moving the crane along the vessel, the bunker should not protrude towards the shore rail beyond the size of the portal. In the crane of the plant PTO them. S. M. Kirov (Fig. 3.5, a) the bunker is made swivel. When unloading cargo from the ship, the hopper is installed horizontally, and when the crane moves along the pier - vertically; at the same time, the bunker does not touch the ship's superstructures. In the Kampnagel crane, for the same reasons, the bunker is made mobile (Fig. 5, b). This allows you to reduce the length of the movement of the grab and the weight of the boom system.

A gantry crane is a complex hoisting and transport machine, the design complexity of which is determined by the complexity of technological operations and increased requirements for the accuracy of execution and operation of the crane.

Figure 3.1 - Portal crane. General form.

1-way trolley;

3-support rotary device;

4-fixed counterweight;

5-cabin management;

6-cabin for mechanisms;

7-mechanism for changing departure;

8-movable counterweight;

10-hard guy;

12-shift working equipment;

3.2 Classification of portal cranes according to their purpose

According to their functional purpose, portal cranes are divided into: reloading, assembly, construction, shipbuilding (Fig. 3.2)

Figure 3.2 - Block diagram of the classification of portal cranes

3.3 Portal cranes

Port cranes. The lifting capacity of cranes used in ports for loading bulk cargo ranges from 1.5 to 20 tons. With a carrying capacity of more than 3 tons, they are usually supplied with interchangeable equipment - grabs for handling bulk cargo and hooks for handling piece cargo. For cranes with a lifting capacity of up to 3 tons, inclusive, the use of grabs is very limited, they are mainly used to supply coastal and river ships with coal. Therefore, in order to simplify the lifting mechanism, such cranes are usually made only with hooks. For specialized sea berths with large amounts of bulk cargo, it is advisable to use grab cranes with a lifting capacity of up to 25 tons.

Port cranes usually have a constant lifting capacity on all outreaches. Depending on the width of cordon warehouses and serviced vessels, port cranes have a maximum reach of 15 to 40 m (and 30 m is usually 25). The minimum overhang is taken from design considerations. In order to serve the largest area from one crane installation, one should strive to have this overhang as short as possible. The gauge of the portal (the distance between the axes of the crane rails depends on the number of railway tracks blocked by the portal. Usually, the portals are made single-track, three-track, double-track and. In some cases, the portals are replaced by L-shaped semi-portals, in which the horizontal frame of the metal structure on one side rests directly on the undercarriages, rolling on crane rails laid on the supporting structures of cordon warehouses (Fig. 3.3) or on special flyovers.

Figure 3.3 - Semi-portal crane

at different levels (Fig. 3.4). This makes it possible to bring the axis of rotation of the crane closer to the ship being unloaded, without resorting to the construction of expensive massive embankment walls. With large fluctuations in the water level in the river during floods, the undercarriages running along the lower rail and part of the metal structure of the semi-portal often work under water.

The turning part of the crane on a single-track portal is installed in the middle of its span; on a double-track portal, it sometimes shifts to one of the crane rails, depending on the operating conditions of the crane. The rotary part of the crane on a three-way portal is sometimes movable, which increases the serviced area, but complicates the design of the crane.

Due to the high cost of the construction of crane runways and embankments, the pressure on the running wheels of cranes is usually limited to 20-30 tons. Depending on this pressure, the number of running wheels is determined.

Figure 3.4 - Portal crane on a semi-gantry of a special design

Possibilities of using gantry cranes for a wide range of operations:

▬ transshipment of piece cargo with the help of a cargo hook;

▬ work with heavy loads;

▬ bulk cargo handling with a grab;

▬ work with a magnet;

▬ handling of scrap metal using a rectangular grab;

▬ handling of containers using a spreader.

Cranes with a bunker (cranes of the "kangaroo" type) on the portal (Fig. 5) are used to unload bulk cargo from ships with a stable cargo flow.

Rotation is eliminated from the crane's duty cycle, thereby increasing productivity. The movement of the grab from the hold to the bunker and back is provided only by the mechanisms for lifting and changing the departure. From the grab

Figure 3.5 - Portal cranes with a bunker (kangaroo type)

the cargo is poured into the bunker and delivered to the warehouse by conveyors, one or two of which are mounted on a crane. The dimensions of the bunker in plan, taking into account the rocking of the grab on the ropes, are significant. To reduce swinging, the length of the suspension should be as short as possible. When moving the crane along the vessel, the bunker should not protrude towards the shore rail beyond the size of the portal. In the crane of the plant PTO them. S. M. Kirov (Fig. 3.5, a) the bunker is made swivel. When unloading cargo from the ship, the hopper is installed horizontally, and when the crane moves along the pier - vertically; at the same time, the bunker does not touch the ship's superstructures. In the Kampnagel crane, for the same reasons, the bunker is made mobile (Fig. 5, b). This allows you to reduce the length of the movement of the grab and the weight of the boom system.