TO Category:
Device tower cranes
Schemes and technical characteristics of tower cranes
tower crane KB-303 (KBK -100.1) is made on the basis of the nodes of the main model of this class - the Crane KB-100.1. The crane is full-revolving self-propelled, with a tubular swivel (unloaded) tower, beam boom. It is equipped with booms 20 and 25 m long and works when they are installed in a horizontal or inclined position. In the latter case, the carriage can move when the boom is tilted up to 12°30'. If the inclination of the carriage is greater, then it is fixed motionless at the end of the boom, and the crane works as with a conventional shunting boom.
The ladder for lifting the crane operator into the cab is placed inside the tower, and the cab itself is attached to the brackets in its upper part.
On the root part of the boom, which has a triangular section, a winch for the movement of the cargo carriage is installed, the ropes of the boom berth and limit switches for limiting the boom reach and carriage travel are also attached there. The counterweight of the crane consists of ten reinforced concrete slabs laid at the bottom on the rotary part of the crane.
The crane uses unified mechanisms: boom winch L-450-Sh, cargo winch - L-3.2-I, turning mechanism, four two-wheeled undercarriages and a cabin.
The crane is mounted and dismantled using its own mechanisms and truck cranes with a lifting capacity of at least 7 tons (AK-75, KS-3561, KS-3562). The crane can be transported between objects in assembled form on a trailer for MAZ-210 vehicles on a rolling cart.
Rice. 1. Crane KB-303 (KBK -100.1):
B - drum of the winch for the movement of the cargo carriage
Rice. 2. Altitude characteristics of the crane KB-303 (KBK -100.1):
1 - for an arrow 20 m long; 2 - the same, 25 m
The tower crane KB-306 (S-981) is designed for the construction of facilities up to 50 m high. is (Fig. 3) full-revolving self-propelled machine equipped with a multi-motor electric drive powered by the mains alternating current voltage 220/380 V. The load moment limiter of the crane allows you to get two cargo characteristics(Fig. 4). The transition from one to another is made by changing the multiplicity of the reeving of the cargo chain hoist.
Rice. 3. Crane KB-306 (S-981)
Rice. 4. Load-altitude characteristics of the crane KB-303:
1 - carrying capacity with a double reeving of a cargo chain hoist; 2 - the same, with a quadruple reeving of a cargo chain hoist (a load weighing more than 5 tons is lifted only with this reeving); 3 - lifting height of the hook during the main assembly; 4 - the same; when assembling I (two sections and -25 m boom); 5 - the same, during assembly II (three sections and a 20 m boom); 5 - the same, during assembly-III (two sections and a 20 m boom); 7 - the same, during assembly IV (three sections and a 15 m boom); 8 - the same, when assembling V (two sections and 15 m boom)
Table 1
Technical specifications tower crane KB-303 
The design of the crane allows you to get five additional assemblies, differing in the height of the tower and the length of the boom.
The crane consists of a running frame, a turntable, a tower, a boom, a hook suspension, chain hoists, a counterweight and ballast, a boom support, unified mechanisms, safety devices and electrical equipment. The boom and tower of a rectangular lattice structure are welded from corners. Sections are joined by hinged bolts. The counterweight and the ballast placed in the center consist of reinforced concrete slabs manufactured by the customer according to the drawings attached to the crane. The unified mechanisms and assemblies include a boom winch of the L-450-111 type, a cargo winch of the L-500-1 type, a turn Z-P-P, a ball turntable, four two-wheeled undercarriages (including two driving ones) and a driver's cab.
Rice. 6. Load characteristics of the S-981B crane:
a - with a horizontal boom; b - with a shunting boom and a fixed cargo carriage; 1 - with double reeving of the cargo rope; 2 - the same, quadruple
Install limiters on the crane: load moment type OGP -1, hook lifting height, rotation and movement of the crane, extreme provisions arrows, as well as a departure indicator, an anemometer of the M-95 type and a lightning rod.
The crane is transported by railway or on a rolling cart on a trailer to the KrAZ-221 tractor.
The S-981B tower rail crane (Fig. 5; 6; Table 3) is a modification of the KB-306 crane, in contrast to which it has a beam boom with a cargo carriage. The load moment limiter allows you to get two load characteristics. Their switching is carried out by changing the ratio of the reeving of the cargo chain hoist. The lifting capacity of the crane can be changed by attaching the carriage and working as with a shunting boom. The arrow is made of corners and has a triangular section. A cargo carriage moves along its lower belts.
Table 2.
Technical characteristics of the tower crane KB-306 (S-981) 
The rail-mounted tower crane KB-401 (KB-1602) is designed for mechanization of the construction of objects up to 60 m high and is a fully revolving self-propelled model (Fig. 7; 8; Table 4) equipped with a shunting boom without a carriage. The hauling rope reeving system is designed in such a way that the hook movement trajectory of this crane remains close to the horizontal when the outreach changes. The crane tower is grown from below in separate sections as the structure is erected. Tower and boom of the crane are lattice, rectangular section made of hot-rolled and cold-drawn pipes.
Unified mechanisms and units include boom winch type L-500 and cargo type L-600, crane slewing mechanism, slewing ring No. 7, four two-wheeled undercarriages and driver's cab.
In the northern version, all cable products and Rubber products. The driver's cab is thermally insulated, heaters are installed in it. The technical characteristics of the crane in the HL version do not differ from the characteristics of the main modification, with the exception of the value greatest height crane lifting (40.5 - 55 m).
Cranes of the same power, but having a more convenient beam boom with a cargo carriage, include the KB-403 (KBk-160.2) tower self-propelled, full-revolving rail crane, shown in fig. 9; 10 and tab. 5. The crane has different loading characteristics, various loading characteristics depending on the number of intermediate sections of the tower, the length of the boom and the angle of inclination of the boom to the horizon when working with a fixed cargo carriage. The crane tower is lattice, rectangular section.
Rice. 7. Crane KB-401 (KB-160.2)
Rice. Fig. 8. Altitude characteristics of the KB-401 crane with different numbers of intermediate sections of the tower and height from the rail head to the boom suspension hinge
Table 3
Technical characteristics of the tower crane S-981B
Table 4
Technical characteristics of the tower crane KB-401 (KB-160.2)
Rice. 9. Crane KBK -160.2 (KB-403) and the layout of the winches:
1 - cargo winch; 2 - trolley winch
Rice. 10. Cargo characteristics:
1 - 1=20 m; Yao=21.2, 26.8 and 32.4 m; 2 - 1=20 m, R0=38 and 43.6 m; 3 - 1=25 m, R0=21.2 and 26.8 m; 4-1=25 m, Yo=38 m; 5 - 1=25 m, R0=43.6 m; 6 - L \u003d 30 m, Yao \u003d 21.2; 26.8 and 32.4 m; 7 -L=30 m, Yao=38 and 43.6 m. h - hook reach; But - the height from the rail head to the boom suspension hinge
Table 5
Technical characteristics of the tower crane KB-403 (KBK-160.2) 
The boom is made in the form of a four-section truss with a triangular section. The lower belt, along which the cargo carriage moves, is made of an angled profile. If necessary, the boom can be converted from a beam to a shunting boom 20 and 25 m long, installed at an angle of 35 and 50 ° to the horizontal. In this case, the cargo carriage is fixed to the head section of the boom.
Boom winch L-500 type, cargo winch L-600 type, crane slewing mechanism, slewing ring No. 7, four two-wheeled undercarriages, driver's cab are unified units and mechanisms.
Rice. 11. Crane KB-674
The crane is transported by rail in separate units that fit into the dimensions of the loading outline, or in assembled form by highways on two special rolling carts on a trailer to the KrAZ-221 tractor.
For the construction of high supports and the installation of various building elements weighing up to 25 tons at a height of up to 70 m, it is recommended to use unified tower cranes KB-674 (Fig. 11) - self-propelled, fully revolving on rails, with a running frame, a fixed tower and a beam boom with a cargo carriage. The design scheme made it possible to master a unified range of tower cranes from KB-674-1 to KB-674-5 on the basis of the main model KB-674 (Table 6).
The fixed tower of the crane lattice lattice of square section consists of separate sections. With the help of a special lift, people are lifted to a height of 74 m in 2.5 minutes. Its design is made using components and parts of mass-produced elevators.
Arrow of the crane of triangular section. Moves along its lower belts cargo trolley. The crane has two electric drives with thyristor converters - a cargo winch and a turning mechanism.
Table 6
Technical characteristics of the unified series of tower cranes KB-674 
Tower crane KB-474 is designed for mechanization of construction and installation works in the construction of residential, civil and industrial buildings and structures with an increased number of storeys with a mass of mounted elements up to 8 tons.
Crane KB-474 is a construction stationary hook-on electric crane with a fixed tower and a full-rotation beam boom, equipped with a cargo trolley.
The height of the free-standing crane is 42.4 m. With an increase in height, the crane is attached to the building with special connections. The installation of the crane is carried out by the extension method using a hydraulic mounting device.
Versions of the tower crane kb-474
Technical specifications
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Parameter name |
Versions of the crane KB-474 |
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1. Maximum load moment | |||||
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2. Load capacity: | |||||
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Maximum with 4-fold reeving and lifting height up to 162.4 m | |||||
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Maximum with 2-fold reeving and lifting height over 162.4 m | |||||
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At maximum takeoff | |||||
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Maximum | |||||
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At maximum load capacity 8 t | |||||
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With a maximum load capacity of 4 t | |||||
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Minimum | |||||
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4. Lifting height: | |||||
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Maximum with 2-fold reeving of a cargo rope | |||||
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Maximum with 4-fold reeving of a cargo rope | |||||
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free standing crane | |||||
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5. Execution according to GOST 15150-69 | |||||
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6. Wind area according to GOST 1451-77 | |||||
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7. Permissible speed wind: | |||||
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For the operating state, corresponding to the threshold of the anemometer | |||||
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For non-operating state at a height of 10 m | |||||
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8. Angle of rotation, not less than | |||||
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9. Environment in which the crane can be operated: | |||||
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Temperature | |||||
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seismicity |
6 inclusive |
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Explosiveness |
explosion-proof |
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fire hazard |
fireproof |
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10. Crane speed | |||||
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11. Classification group (mode) according to ISO 4301/1: | |||||
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mechanisms | |||||
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12. Weight: | |||||
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constructive | |||||
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counterweight plates | |||||
Source of information: JSC "Rzhevsky Crane Plant"
http://www.rkz-rzhev.ru
Tower cranes. OJSC "Rzhev Crane Building Plant"
Date entered in the database: 04.08.2006
Relevance: Actual
Trademark: Rzhev Crane Building Plant, OJSC
Documentation
Arbitrage practice
Consultations
Used in the construction of 16-storey buildings for various purposes, the KB-408 tower crane has gained popularity due to its ease of operation and well-thought-out safety.
What device does this model of lifting equipment have? What are its main features and specifications? How is the KB-408 tower crane operated? How much does a new and used model of this equipment cost? We will consider these and other questions in the article.
Device
This model is included in the V category of cranes, its design coincides with similar models of this group.
The lift mechanism is arranged section by section by means of iron profiles welded in the form of a lattice. To change the overhang: increase or decrease it, move the carriage.
The design of the KB-408 forklift consists of:
- rotary single-row device, platform;
- portal;
- telescopic turret rotating 180 degrees;
- operator cabins;
- beam type booms with trolley cargo destination, with the help of it, lifting the load is possible in both directions: up and down;
- running frame;
- additional details.
Rotary: single row device, platform
The portal is installed on top of the platform, where there are also 2 types of winches:
- rifle,
- cargo.
At the rear of the platform, a counterweight is mounted in the form of 10 reinforced concrete blocks., thanks to them the rotary mechanism does not sway during transfer.
Braces and racks are mounted in trussed elements.
The platform has a base, attached to the running gear by means of a turntable.
Recently happened design changes in KB-408, with regard to the structure of the rotary device, outwardly it looks like a circle with a diameter of 2500 mm.
Additional parts - support hinge, working struts and other elements.
Portal
The portal is arranged in the form of a tetrahedron. On both sides it is open to the movement of parts of the tower. It rests on a trussed element, telescopic struts. Created from 2 trihedrons. Between them, fastening occurs with the help of beams having the shape of a box.
It is through the portal that the process of increasing the height, a stable position in the space of the tower is possible.
It has a roller mechanism arranged in two rows and four lock elements, able to keep the tower from falling during the installation of the crane.
Tower
The design of the tower is similar to that of the K-160. Represents:
- headroom,
- inventory, head sections,
- spacers.
headroom
Element of the tower, arranged like a lattice of metal. It has racks, stairs, platforms.
At the very top of the head, a boom bracing, a cargo rope are attached. There is a device for removing lightning, an anemometer.
head section
Blocks of two ropes are attached to it for moving carts and goods. Installed at the top signal fire, at the bottom - buffer stops for trolleys.
control cabin
The device is held on special mounts at the top of the tower. It is a cabin for cranes operating at a height of no more than 20 meters. Compared to its predecessor, K-160 has improved technical devices, heating panels.
girder boom
Individual structural elements are welded and interlocked by means of flange parts. The elements themselves are made of metal. On them there is a movement of the cart moving the load. With the help of the latter, the boom departure is changed.
Running frame
On a structure with dimensions of 7.5 x 7.5 meters (four-ring frame) there are rotating weather vanes on which the carts are held. A knife switch is held on the undercarriage of the crane.
Weathercocks have two states:
- transport;
- working.
Crane trolleys - 4. A couple of them use an electric drive, the rest do not.
Rails for KB-408 can be used in two types:
- rounded;
- straight.
The features of these mechanisms are in the position of the main control carts. On a straight rail type - everything is on the same axis. On rounded - outside the center of the rounding.
Additional details
As additional parts, KB-408 has various elements: a brace, a hook part and a mounting device and other fasteners:
cargo winch has in its device a drum mechanism, brakes, gearbox, engine. They stay on the platform. Fastening to the latter occurs with four screws. Purpose of the winch - vertical movement cargo.
trolley winch, constituent elements the same. Motor with two speeds, provide precise targeting of the load over the installation site.
Telescopic strut constructed from pipes of different diameters, nested one inside the other. They provide balance and hold the tower when installed on the platform.
Crane strut in the form of a triangle, attached to the top of the tower. Assists in setting up the tower and deflecting the bail line away from the tower. On the spacer there are 4 axle blocks, a quickdraw, a rope part for moving loads, a device for mounting a load sensor.
The crane is transported in a disassembled state, it is mounted on site using the available mounting devices.
The movement of the crane is carried out by means of a rail mechanism. KB-408 have counterweights to the tower, located under the latter.
In order to increase maximum height lift up to 77 meters, the boom is tilted at an angle of 30 degrees. The boom reach to the maximum in this case will be only 50 meters, the load capacity, however, in this case is only one and a half tons.
For maintenance of KB-408 there is a platform fixed to the base of the boom.
Specifications
| Load moment, max, t | 1800 |
| Carrying capacity, max reach, tons | 6,3 |
| Carrying capacity, max t | 10 |
| Load capacity, for each boom section, t | 3 |
| Length (horizontal boom), max/min, m | 32/4,5 |
| Length (overhead boom), max/min, m | 26,6/4,2 |
| Height (horiz. boom), max, m | 54 |
| Height (overhead boom), max, m | 72,7 |
| Length (moving down), m | 5 |
| Speed (load lifting), max height, m/min. | 30 |
| Speed (load down), m/min. | 4,8 |
| Trolley speed (with load), m/min. | 30 |
| V crane, m/min. | 12,8 |
| Rotation, m/min. | 0,65 |
| Base length, m | 7,5 |
| Track length, m | 7,5 |
| Curve radius, min | 12 |
| Power, kWt | 77,6 |
| Power of a cargo winch with a horizontal boom, kW | 55 |
| Power of a cargo winch with an inclined boom, kW | 30 |
| Rotary device power, kW | 7 |
| Power of the device that moves the crane along the rails, kW | 11 |
| Boom winch power, kW | 15 |
| Structural mass | 54,8 |
| Weight of counterweight | 40,4 |
| total weight | 95,2 |
How to manage
The design of the beam boom allows you to more smoothly direct the load to the installation site.
The tower crane is controlled by special software and hardware located in the cockpit, in particular, controllers and radio-controlled consoles.
Switching landing and lifting speed is done by means of a single switch.
This crane is distinguished by thirteen versions, only the boom outreach values (20, 30, 35), respectively, the load capacity and the lifting and lowering values differ.
The beam boom is mounted at an angle, such as 43 degrees and 30 degrees.
The crane has:
- control mechanism self-diagnosis system,
- remote control via GPRS,
- touch control,
- frequency control of motors.
The cabin air conditioning system is also sold separately.
Additions in the equipment of the crane:
- Heating in the cab. The crane can work successfully both at +40℃ and -40℃. Since its purpose is for the IV zone. Accordingly, it has a well-heated operator's cabin.
- load cell. The lifting mechanism is equipped with a load control sensor, thanks to which the main components of the system are monitored.
- Control of the movement of cargo elements. Thanks to special device(frequency) movement of concrete slabs and other loads occurs smoothly and without interference.
- Cabin temperature control. Thanks to modern electronic stuffing cabin is temperature controlled.
- Safety system in case of rope break, (shock absorber, coupler). Works and holds the boom when the rope breaks.
Cost of new and used equipment
In Russia, you can buy a new KB-408 crane at a price of at least 7–10 million rubles. from the manufacturer of the Nyazepetrovsky Crane Plant. Complete with a crane can also be supplied girder boom 40-50 m long.
At the request of the buyer, the seller company can equip the cabin modern system conditioning, which undoubtedly plays in favor of this model of technology.
Equipment from 2005 can be found at a cost of 4.5 million rubles. Newer forklifts will cost more. It is also widely practiced to rent tower cranes from 800 rubles. at one o'clock.
Thus, the KB-408 model among its counterparts is in the forefront in terms of technical equipment and carrying capacity. It has a relatively inexpensive price on the market, has a lot of positive feedback among contractors. If the choice is about high-quality lifting equipment, then, definitely, you should take a closer look at the KB-408 tower crane.
You can watch a video of the operation of the KB-408 tower lifting and cargo mechanism here:
The tower crane KB-309KhL has been mass-produced since 1984 at the Ukhta Mechanical Plant of the Minstroydormash.
Crane KB-309KhL is designed for mechanization of construction and installation works in the construction of residential and office buildings at an ambient temperature of -60 to +40°C.
For work in regions with a cold climate, the metal structures on the crane are made of low-alloy steels; electric cabinets and electrical equipment are equipped with electric heaters so that they function normally when low temperatures. The driver's cab is lined with sheet steel on the outside, and chipboard on the inside. The cavities between the facings are filled with fire-resistant heat-insulating materials. Heating panels "Sloterm" are mounted under the floor and on the walls of the cabin.
The heating system and supply and exhaust ventilation provide air heating in the cabin up to +15°C for 30 min at an outside air temperature of -50°C at the beginning of the working day. The windows are equipped with power-driven wipers, devices for heating and blowing glass, and sun visors. The cab is equipped with a comfortable sprung soft driver's seat, adjustable in height.
The KB-309HL crane is unified with the KB-100.0A-1C crane, but differs from it in a higher lifting capacity, load moment and working speeds of the load, since up to 30 kW the power of the electric motor of the cargo winch has been increased. The reliability of the crane slewing mechanism is increased due to the unified U 351.42R slewing mechanism with a special brake.
Technical characteristics of the tower crane KB-309HL
| load moment, t m | 125 |
| load capacity, T | 5 - 8 |
| departure, m | 25 - 15,6 |
| Height, m | 22 - 37 |
| engine power, kW | 58,1 |
| speeds, m/min: | |
| rise | 10 |
| lowering smooth | 3 |
| crane movement | 29,7 |
| crane rotation, rpm | 0,75 |
| Mass total, T | 70,6 |
| constructive weight, T | 30,6 |
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Upgraded tower crane KB-100.3A (technical specifications)
description and specifications |
In 1982, the Leningrad Association "Lenstroymash" and the Rustavi Crane Building Plant developed technical documentation for the modernized KB-100.3A tower crane, replacing the KB-100.3 and KB-100.1A tower cranes. The modernization was carried out in order to increase performance indicators crane and, first of all, productivity by increasing the speed of lifting the load and lowering the idle hook, as well as in order to reduce the complexity of manufacturing the crane.
The modernized tower crane KB-100.3A is designed for mechanization of construction in the construction of residential, administrative and industrial buildings up to 9 floors high with lifting building elements weighing up to 8 T. The crane is designed for easy mode work in I - V wind regions at an ambient temperature of +40 to -40°C.
The new modernized tower crane KB-100.3A has two versions: KB-100.3A-1 (basic version) with a tower for nine-story construction and KB-100.3A-2 with a shortened tower (without insert) for five-story construction.
Pilot samples of tower cranes of two versions, manufactured by the Rustavi Crane Building Plant, have successfully passed acceptance tests and are recommended for mass production.
Upgraded tower crane KB-100.3A ( see picture) consists of a running frame 6
with weather vanes and undercarriages; turntable 7
with cargo and boom winches placed on it, turning mechanism, two electrical control cabinets and a counterweight; towers 8
with spacer, struts, blocks and mounting rack; arrows 10
with pulleys and hook lifting height limiter, braces 11
booms, driver's cabs 9
, top 1
and lower 2
clips, hook suspension 12
, electrical equipment 3
, counterweight 4
and ballast 5
.
Technical characteristics of the tower crane KB-100.3A
| KB-100.3A-1 | KB-100.3A-2 | |
| The largest load moment, t m | 100 | 125 |
| departure, m: | ||
| largest | 25 | 25 |
| at load capacity | 12,5 | 15,6 |
| load capacity, T: | ||
| at longest reach | 4 | 5 |
| greatest | 8 | 8 |
| Hook lifting height at maximum reach, m | 33 | 24 |
| The depth of lowering the load below the rail head, m | 5 | 5 |
| speeds, m/min: | ||
| lifting the largest load with a two-fold / four-fold rope reeving | 30 / 15 | 30 / 15 |
| . lifting loads weighing up to 2 T with double rope reeving | 45 | 45 |
| . lifting loads weighing up to 4 T with fourfold rope reeving | 22,5 | 22,5 |
| . smooth landing of the largest load with double / quadruple rope reeving | 5 / 2,5 | 5 / 2,5 |
| . departure changes | 15 | 15 |
| . crane movement | 28 | 28 |
| Rotation frequency, rpm | 0,7 | 0,7 |
| Track X base, mm | 4.5 x 4.5 | 4.5 x 4.5 |
| back gauge, m | 3,6 | 3,6 |
| Crane rail type | P50 | P50 |
| 175 | 175 | |
| Installed power of electric motors, kW | 78,3 | 78,3 |
| constructive weight, T | 34 | 31,7 |
| Weight total with counterweight and ballast, T | 87,4 | 85,1 |
Running frame consists of an annular frame with lugs, four diagonal weather vanes, four rigid rods and four undercarriages, two of which are leading and two driven.
ring frame
box-section, its upper and lower belts are made together with lugs reinforced with overlays. The inner shell of the annular frame is made of pipes measuring 1220 X 8 mm. On the side surface of the outer shell, brackets are provided for installing central ballast plates.
weather vane are welded beams of box-shaped variable section. The lower chords of each vane are equipped with two longitudinal ribs, which increase the resource of the vane and its reliability under operating conditions.
Turntable is a flat frame with a truss superstructure. Crane mechanisms are placed on the turntable: cargo twin-engine and boom winches, U3515-42P turning mechanism. Electrical control cabinets are installed on the sides, counterweight plates are on the tail booms. In front of the platform there are two brackets for mounting the crane tower. The turntable is connected to the running frame by means of a single-row roller slewing ring.
flat frame
consists of an annular box-section beam, a cantilever part made of two box-section longitudinal tail beams interconnected by a transverse beam of the same section.
cargo winch
- twin-engine, while the auxiliary engine is two-speed. The electric motors are connected in series with each other by a coupling. A brake is installed between the main and auxiliary motors. At the free end auxiliary engine installed brake machine, reliably providing a smooth landing of goods at speeds up to 5 m/min with double reeving and up to 2.5 m/min with a fourfold reeving of a cargo rope.
To lift the crane boom during installation, a unified boom winch L-450P is installed on the turntable.
Complete tower for the crane of the basic execution consists of the top and average sections, the basis, struts and struts. The sections are interconnected by flanges and butt bolts.
On the top section
blocks for a cargo rope and a jib guy were installed. Inside the upper section there is a ladder for climbing into the driver's cab and access to the upper blocks for their maintenance. In the middle of the upper section, a hinge frame is welded in, which has lugs for attaching the boom and turret struts.
middle section
the tower is made of pipe; stairs are installed inside it.
tower base
it is also made of a pipe resting on a two-legged portal, which is pivotally attached to the brackets of the turntable. There is a ladder inside the base. Pins are provided in the upper part of the base, to which the struts of the tower are attached.
Spacer
The tower consists of a welded frame made of pipes, two outlet blocks for cargo ropes and four head blocks, two of which are used to pass the boom guy rope, and two - to pass the boom chain hoist rope. The axis of one of the outgoing cargo blocks is fixed on a swivel bracket, which allows you to create a load on the force sensor of the cargo rope limiter.
Folding struts are used to hold the tower in a vertical position and to connect the turntable to the tower when transporting the crane on a rolling cart.
Folding strut
consists of upper and lower beams. The head part of the upper beam is made in the form of an earring, which is put on the pins of the base of the tower together with an eccentric bushing, which provides compensation for inaccuracies in the manufacture of the tower and turntable. The lower beam is also equipped with an eccentric sleeve, which provides adjustment of the length of the lower brace.
short tower consists of top section, base, struts and struts.
Arrow trihedral lattice structure, three-section (base, middle and head sections); belts and braces are made of pipes.
Joints of sections are flanged, connected with special bolts. The sections are equipped with hinges that ensure the folding of the boom during transportation into a double or triple package, depending on the version of the crane.
On the head of the spray are installed a transfer and cargo blocks. A mounting strut is provided at the base of the boom.
To control the electric drives in the modernized tower crane, a complete device KVK-5 was used, which makes it possible to increase the speed of lifting and lowering the idle hook and loads weighing up to 3 T, use more reliable brakes in lifting and departure mechanisms direct current MP-301 type, which are powered by a control circuit rectifier.
The scheme of the complete device provides for the possibility of testing devices without turning on the power unit using a switch, which, even in the "Test" mode, does not allow the line contactor to turn off and brake mechanisms lift and change of departure.
The crane mechanisms are controlled from panels installed in the driver's cab, and when mounting the crane, using a remote push-button mounting panel. The driver's cab is equipped with air conditioning.
Transportation of the crane of the main execution is carried out by two road trains, the second (shortened) execution - by one.
To assemble the tower, install counterweight plates and central ballast, use the K-162 truck crane or any other load capacity of 10 T(truck crane K-162 - with a lifting capacity of 16 tons, approx. site author).
Installation of a crane from transport position into the working one is carried out by turning the tower with the help of a cargo winch, on the drum of which the rope of the boom chain hoist is fixed.
The transfer of the boom from the transport position to the working position is carried out with the help of an auxiliary truck crane and a boom winch, on the drum of which the second end of the cargo chain hoist rope is fixed.
The crane is equipped with load capacity limiters, hook lifting height limiters, boom outreach, rotation and movement limiters, an anemometer and a lightning rod.
By technical level the modernized tower crane KB-100.3A corresponds to the best domestic and foreign models.
Tower cranes KB-403 are out of production, and therefore we are ready to offer you more modern and improved models.
Tower cranes KB 403, produced on the basis of the Nyazepetrovsky Crane Plant, are used in industrial and civil construction for the construction of high-rise buildings. In total, three plants are engaged in the production and assembly of KB 403 in Russia (Nyazepetrovsky, Polish and Moscow "Stroymash" and Podolsky "Stroitekhnika").
To date, not a single major construction takes place without the use of this model of cranes.
Tower crane KB 403: features and specifications
Depending on the modification, the design of the KB 403 tower crane allows lifting loads of various weights to a height of 16 or 17 floors. The convenient device of the crane makes it possible both to assemble the mechanism at the facility and at the factory with further transportation and installation using a truck crane.
The KB tower crane has a number of operational features and technical advantages:
The tower crane KB 403 has the ability to perform any manipulations with lifting cargo to a height. This frees the construction company from the need to purchase and bring additional working equipment to the site;
The crane tower has a lattice structure, which provides structures additional stability, strength and reliability when lifting weights;
The crane trolley moves along the entire length of the boom, both in a horizontal and vertical position. This eliminates the need to move the structure around the construction site, saving time and money spent on the construction of the building;
The tower crane KB 403 is made of durable materials that are not prone to premature rusting, destruction and deformation under the influence of moisture, dampness, temperature extremes and gravity;
The system is controlled both from the tower crane cab and from the construction site;
The tower crane KB 403 is assembled and prepared for work in a short time (several hours from the moment the crane is delivered is enough to put it into operation);
For ergonomics and ease of use, the crane cabin is equipped with additional equipment providing operator comfort.
Our cranes operate throughout Russia, sent to the CIS countries - Armenia, Kazakhstan, Belarus, Turkmenistan and Tajikistan. As a leading manufacturer construction equipment V Eastern Europe, Giraffe supplies the legendary tower cranes of the KB 403 series.
The tower crane KB 403 "Giraffe" is quality, reliability and performance, time-tested and proven by deeds.
