Tower crane. Tower Crane Commissioning and Dismantling

tower crane KB-474 is designed for mechanization of construction and installation works during 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

Parameter name		Versions of the crane KB-474
1. Maximum load moment
2. Load capacity:
Maximum with 4-fold reeving and lifting height up to 162.4 m
Maximum with 2-fold reeving and lifting height over 162.4 m
At maximum takeoff
Maximum
With a maximum load capacity of 8 t
With a maximum load capacity of 4 t
Minimum
4. Lifting height:
Maximum with 2-fold reeving of a cargo rope
Maximum with 4-fold reeving of a cargo rope
free standing crane
5. Execution according to GOST 15150-69
6. Wind area according to GOST 1451-77
7. Permissible speed wind:
For the operating state, corresponding to the threshold of the anemometer
For non-operating state at a height of 10 m
8. Angle of rotation, not less than
9. The environment in which the crane can operate:
Temperature
seismicity		6 inclusive
Explosiveness		explosion-proof
fire hazard		fireproof
10. Crane speed
11. Classification group (mode) according to ISO 4301/1:
mechanisms
12. Weight:
constructive
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

Tower KB-403 - self-mounting mobile mechanism.

The slewing crane has electrical control and a rail course with a beam boom equipped with a cargo trolley.

How base model, and its subsequent modifications ("A", "B") were produced on several Russian factories(Nyazepetrovsky, Podolsky, Karacharovsky, Moscow "PO Stroymash", etc.)

Cranes in Russia began to be produced at the end of the 19th century, but the production was of a single nature.

After the Great Patriotic War USSR factories began to produce up to 4,000 tower cranes annually, but they were all of different types, which hindered the development of crane building.

IN post-war years was launched first series cranes BKSM.

The construction was brick, so the devices were used for the most part for reloading and supplying materials upstairs.

In the second half of the 20th century, large-block, frame construction began to develop rapidly in the country, and in 1960 a series of KB — TO wounds B towered. The series was designed for 8 models, not counting modifications.

Scope of application

Using KB-403 (alternative designation Kbk-160.2) All mounting And construction work became mechanized.

Also KB-403 use on grain elevators And industrial enterprises, factories And power plants.

Lifting height of heavyweights up to 8 tons = 57.5 m. The crane performs all vertical and horizontal movements on the jobsite building structures and materials to the right place.

Transportation

Installation - using a truck crane (one or two).

Move KB-403 from one work site to another in the assembled form.

For transportation by road, the approval of the traffic police is required.

Differences KB-403

KB-403 — the first digit after the letter abbreviation of the model name is the number of the size group (4) according to the load moment, the next 2 digits (03) - from 01 to 69 - indicate the rotary type of the tower.

A feature of the technical characteristics of cranes of the KB-403 type is a beam boom of a cargo trolley and a trolley winch.

The boom is a three-sided truss, in which the upper belt and braces are welded from pipes, and the lower driving belts are made from corners.

The boom is sectional, the maximum reach varies from 20 to 30 m.

Device KB-403

• Tower— lattice rotary, has adjustable height. It consists of retractable sections, the head section is collapsible.
• The KB-403 tower is grown from below.
• Arrow- lattice single-suspension beam sectional, is a trihedral truss, along which the trolley moves.
• Freight cart fixed with hinges and cables, designed for transportation of materials, parts.
• Swivel platform is a flat device on which the portal is mounted. Top front - lugs of the support hinge. On the side are cabinets with controllers and starters. Behind the transverse beam, rods are welded to which the boom block is attached. Ballast plates weighing 30 tons are laid on the transverse beams.

The main crane devices are placed on the platform: the turning mechanism, winches (cargo and boom). On both sides, 2 counterweight blocks are fixed with steel studs.

The support for the turntable is the running frame, they are connected with the help of the OPU. The rotary mechanism on KB-403 is a roller circle (in 1 row), diameter = 2.5 m.

• Portal mounted on a turntable, open at the top and bottom for the passage of tower sections.
• Rope system equipped with pulleys.
• The mechanism can be controlled from the cab and from the ground.

Tower crane KB 403 - specifications

• lifting capacity depends on the height of the tower, the length of the boom and the wind load of the construction area. The KB-403 series is intended for wind load of I-IV degree;
• temperature range ±40ºС;
• boom outreach (min/max) = 5.6/30m;
• section base = 1.8 m, tower sections - up to 5 pieces;
• the crane is equipped with a multi-engine electric drive alternating current;
• maximum load moment = 120tm;
• crane travel speed=18m/min;
• full trolley speed=30m/min;
• boom outreach at max. lifting capacity=16.5m;
• ascent/descent speed=30/45m/min.

Site installation

Mounting begins with the assembly of crane rails. R43/P50 rails are used.

After mounting the undercarriage, the tower is brought to a vertical position, using a medium-duty crane for this work.

The assembly ends with hanging the boom, extending the tower and setting up all the nodes.

Modifications: KB-403A, KB-403B - the main differences

Crane KB-403B differs from KB-403A:

• increased boom before departure (in KB-403B=30m, in KB-403A=25m);
• greater by 0.5 t gross weight with counterweights (“A” = 80t, “B” = 80.5t).

Tower crane KB 403A - specifications

KB-403A is different from basic models KB-403 increased lifting speed, high load moment (120 tm), increased bogie speed and improved crane cab.

KB-403A - specifications :

• load capacity = 8t ;
• load moment = 120tm;
• maximum boom length = 26.3m;
• lifting height with raised boom = 52m (with horizontal boom = 42m);
• load lowering depth = 3m;
• total weight = 80t (counterweight = 30t);
• the only girder jib crane that cannot move a load cart along the slant jib;
• to increase the lifting speed, a U59 cargo winch is used frame structure with 2 engines: main and additional, which are located on one side of the gearbox.

Specifications KB-403B

KB-403B It has 4 option performance(each with its own specifications).

The mechanism is intended for construction miscellaneous type buildings height before 17 floors.

KB-403 B — technical characteristics:

• load capacity = 8t ;
• 4 versions with load moments from 120 to 132tm;
• lifting height with raised boom = 54.7m (with horizontal boom = 41m);
• load lowering depth = 5m;
• maximum boom length = 30m;
• total weight = 80.5t (counterweight = 30t).

TO category:

Construction of tower cranes

Schemes and technical characteristics of tower cranes

The tower crane KB-303 (KBK-100.1) is made on the basis of the units 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 an AC voltage of 220/380 V. The load moment limiter of the crane allows you to receive 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 characteristics of the 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. A cargo trolley moves along its lower belts. 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

KB-403 - self-erecting tower crane with electric control. The crane moves on a rail track. Structurally, the crane consists of: a slewing platform and a slewing mechanism, a running frame with swivel weathercocks, a portal, a tower section, a tower, control cabins, block boom and hook clip.

Who manufactures the KB-403 crane? Tower cranes KB-403 (further modifications of these cranes KB-403A, KB-403B) were produced at the Nyazepetrovsk Plant Construction Machinery, Nyazepetrovsk (now the Foundry and Mechanical Plant). Other manufacturers are the plant of the Moscow "PO Stroymash", the Karacharovsky mechanical plant, the Podolsk plant "Stroitekhnika", etc.

The KB-403A crane is a modification of the KB-403 crane. Designed for the construction of residential, industrial and administrative buildings and structures up to 16 floors high with a temperature environment-40 °C to +40 °C. KB-403A is different high speed lifting and moving the cargo trolley, improved cargo moment, control cabin design and improved heating. The lifting capacity of the crane is 8 tons. KB-403A cranes were manufactured by the Moscow plant of the Moscow PO Stroymash. Crane KB-403B. Designed for the construction of residential, industrial and administrative buildings and structures up to 17 floors high with an ambient temperature of -40 °C to +40 °C. It has 4 versions (each with its own load-altitude characteristics). Crane lifting capacity 8 t.

Technical characteristics of the crane KB-403

Parameter	Unit measurements	Value
Control - electrical, input voltage	IN	380
Motor power	kW	116-120
Swing power	kW	5
Height in free position	m	37,9-54,7
Width (track)	m	6
Section base	m	1,8
Number of tower sections	PC	up to 5
Turning part, radius	m	3,8
Total weight of the structure	T	76,6-80,5
Weight of counterweight	T	30
Maximum lifting capacity (with minimum boom shot)	T	8
Lifting capacity at max. boom reach	T	3
Maximum lifting height	m	54,7
Maximum boom reach	m	30
Load moment (maximum)	t*m	120
Departure of an arrow (minimum/maximum)	m	5,6/30
Boom reach at max. lifting	m	16,5
Maximum movement speed	m/min	18
Cart full speed	m/min	30
maximum lifting speed of the hook block	m/min	55
Smooth landing	m/min	5
Rotation frequency	rpm	kN	270

Comparative technical characteristics of KB-403A, KB-403B, KB-403B.4

Options	KB-403A	KB-403B	KB-403B.4
Structural weight, t	50	50,5	46,6
Total weight, t	80	80,5
Track, m	6	6
Load moment, t*m	132	120	132
Maximum carrying capacity, t	8	8	8
Lifting capacity at full outreach, t	4,5	3	3
Boom reach maximum, m	25	30	30
Boom reach with max. load, m	16,5	15	16,5
Lifting height at full reach, m 41	41	41	24,2
Maximum lift, m	52	54,7	37,9
Landing speed, m/min	4,8	5	5
Lifting speed max. load, m/min	40	40	40
Maximum lifting speed, m/min	58	55	55
The highest speed of the chassis	18	18	18
The speed of the filled trolley	23	30	30
Rotation frequency, rpm	0,6	0,65	0,65
Possible degree of wind gust	IV	III	VII

Comparative technical characteristics of KB-403B, KB-403B.1, KB-403B.2, KB-403B.3

Versions	KB-403B	KB-403B.1	KB-403B.2	KB-403B.3
Maximum load moment, tm	120		132
Carrying capacity, t
maximum	8
at maximum horizontal boom reach	3		3,5
at the maximum reach of the inclined boom at an angle of 30°	3,7		4,3
Departure, m
maximum horizontal boom	30
maximum inclined boom	26,3
at maximum load capacity	15		16,5
minimum	5,6
Maximum lifting height, m
boom horizontal / number of sections	41/6	35,4/5	29,8/4	24,2/3
inclined arrows	54,7	49,1	43,5	37,9
Maximum lowering depth, m	5
Rotation angle, degrees	1080
Speed, m/min
lifting (lowering) of cargo up to 8 t	40
lifting (lowering) hook suspension	55
smooth landing of cargo up to 8 t	5
cargo trolley with a load of up to 8 tons	30
crane movement	18
Rotation frequency, rpm	0,65
Power electric motor, kW
main cargo winch	55
auxiliary cargo winch	30/1,6
boom winch	15
trolley winch	5
turning mechanism	5
crane traveling mechanism	5.5 x 2 = 11
Total power of electric motors	121
Geometric parameters, m
track X base	6 x 6
tail clearance	3,8
Weight, t
constructive	50,5	49,2	47,9	46,6
counterweights	30 (+/-0,3)
270
Seismicity, points	1-6 according to SNiP II-7-81
wind region	III	V	VI	VII

dimensions, drawing of the crane KB-403

How is the tower crane KB-403 arranged?
- The use of metal pipes in the form of a lattice structure makes the structure of the tower and boom lighter, which gives the structure greater accuracy when moving and free visual control of the actions performed.
- With the help of a cargo trolley, movably fixed on the boom, both vertical and horizontal movement of building parts and materials is carried out.
- The turntable of the KB-403 tower is made in the form of a roller circle with a diameter of 2500 mm.
- The turret is unified in design with some units of the KB-160 crane, with the exception of the design and equipment of the turret head. It differs in the length of the chain hoist ropes and the maximum possible number of installed inventory sections, as well as the design of the head section of the tower has been changed - now it has become collapsible.
- The cabin of KB-403 differs from the cabin of the base model in a more advanced design, adapted for convenient viewing at a higher crane height, and also differs in internal filling and equipment - improved insulation and heating panels. Additionally, it can be equipped with air conditioning.
- girder boom also has a sectional design.
- The crane can be equipped with a safety device with a coordinate type protection system.
- The crane can be controlled both from the cab and remotely. How to dismantle (disassemble) and assemble (assembly) the KB-403 crane?
For the installation of KB-403, our own tower crane mechanisms and truck cranes are used.
- Laying railroad tracks. Rail tracks with sleepers of the required length are laid on a pre-prepared site, and traffic limiters are installed along the edges of the rails.
- Installing the turntable and running frame on rail track. Installation is carried out by two truck cranes, one of which sets the platform (on the running frame, the transport position locks are removed from the swivel supports). The second truck crane, in turn, under the fastenings of the rotary supports, support carts are installed on the rail tracks. Carts are fixed in working position. Then side counterweight plates are installed on the sides of the turntable.
- Installation of a portal with a tower. The fastenings of the trussed truss of the turntable are docked with the fastenings of the crane portal. Fasten with hinged bolts. Next, a control cabin is mounted on the tower and struts with blocks are placed on the tower. Then, in turn, the main counterweight plates are placed on the turntable. A clip is attached to the fastening rods of the lower clip of the boom pulley block. The crane ropes are reeved and the electrical equipment is adjusted.
- Lifting the crane and assembling the boom. The crane is lifted by its own mechanisms. Installation of working struts to hold in a vertical position. The boom is assembled using a truck crane. After the boom is assembled, the crane hook frame is installed and the boom ropes are reeved (boom bracing, cargo rope). If necessary, the crane is built up with additional (inventory) sections of the tower.

When dismantling the cranes, all the above actions are carried out in reverse order, in accordance with the installation instructions and the Safety Regulations. Dismantling is carried out using truck cranes and own mechanisms. Installation, dismantling, extension, and extraction of crane sections is prohibited with a raised boom. So you bought or rented a KB-403 crane. How to transport it?
On the running frame of the crane, the slewing weathercocks are fixed in the transport position. The boom is completely removed from the crane together with the cargo trolley and loaded separately from the rest of the crane (tower, head section, portal) onto transport. Take off cargo trolley from the boom during transportation is not necessary. Each element of the crane is transported in parts (a turntable with a support frame, a control cabin, inventory sections of the tower, an boom with a cargo trolley, ballast plates, support trolleys). For transportation on highways, rolling carts and / or a truck tractor are used as transport.
To transport a crane, it is necessary to coordinate with the traffic police (issuing a travel permit, obtaining an escort car - in accordance with the Rules of the Road).

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 smoothly	3
crane movement	29,7
crane rotation, rpm	0,75
Mass total, T	70,6
constructive weight, T	30,6

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:
greatest	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.