General
The
shiploader for bagged goods is a mobile installation on
the quay with telescopic boom. The basic boom has a head
lattice construction that contains the supporting rollers,
the lantern gear drive and the cable pulleys of the suspension
of the boom.
The telescopic part of the boom carries on the front the
complete spiral chute and the hydraulic cylinder for keeping
the chute in upright position.
With this loading installation, the entire ship's hold can
be covered without the need to shift the ship during loading.
The loading process is done by moving the entire installation
along the quay, by the telescopic movement and hoisting
of the boom, by the telescopic movement of the spiral chute
and by swinging of the loading head.
Inside
the installation, the transport takes place in the following
matter:The bags arriving on the longitudinal quay conveyor
belt are taken up by a bag receiving cart, turned 90°
by the round conveyor belt and via a supply conveyor belt
transferred to the conveyor belt of the boom. Because the
boom is telescopic, this conveyor belt inside the boom is
split in 2 parts. The first part is inside the basic boom
and the second part inside the telescopic boom. The telescopic
distance is 12.5 m / 41 ft.
The bags are conveyed to the spiral chute on both conveyor
belts of the boom. Here, they are either buffered or they
continue directly to the turntable. From here, they are
transferred to the loading head. The loading head consists
of a double telescopic roller conveyor with a detachable
conveyor belt.
The
shiploader is made up of the following units:
-
Steel
structure
Gantries in a strong frame structure with fixed supports
at the water and land sides. A tower comprising two frame
uprights, main girder with built-in roller and 2 main
ties.
Machine room with hoisting drum. The telescopic boom consists
of the fully closed basic boom and telescopic boom. At
the end of the basic boom, the cable pulleys for the hoisting
cable are mounted.
-
Machine
installations
Gantry trolley at the gantry supports at respectively
the water and land sides. 50% of the running wheels are
driven off synchronously switched flanged motors with
conical gear equipped with collector rings, eddy-current
brakes and disc brakes.
The hoisting gear consists of the hoisting drum assembly
with collector ring motors and eddy-current brakes, flanged
reduction gear, band brake and external drum brake. The
cable routing is according to DIN15020, cable routing
group 1Am, carried out with galvanized crosslay cables.
Telescopic installation with rack and pinion drive, reduction
gear motor with conical gear transmission with collector
rings, eddy-current brake and disc brake.
Control cabin at the upper part of the gantry. The entire
installation is operated from the control panel that is
located here.
-
Transport
installation
Bag receiving cart with round conveyor belt. Ascending
supply conveyor belt to the shiploader. Conveyor belt
of the boom in telescopic execution. Axle base ranging
from 17.5 to 30 m (57.5 to 98.5 ft)
Conveyor belt width 800 mm (31.5"). Flat belt with
U-shaped carriers. Driven off gearbox motors with brake
and chain transmission.
-
Loading
installation
Telescopic spiral chute comprising platform, stainless
steel chute, protection cage, rain cover, hydraulic cylinder,
hydraulic pumping unit and chute which is telescopic over
3m (9.8 ft). Loading head assembly with loading case,
telescopic roller conveyors n° 1 and n° 2, loading
turntable, bag chute and detachable conveyor belt.
-
Electrical
installation
Main switchboard with all main and auxiliary protection
devices, fuses and accessories. Control panel with all
required switchgear for incorporating in the main switchboard.
Arrangement in the machine room. Control panel with all
controls. Arrangement in the control cabin. Main power
supply via a power supply channel that is inside the quay
and the main power cable drum.
Control power supply via the control cable and the control
power cable. Switchboard with all switchgear for mounting
to the loading case. Portable control panel with flexible
power supply line and plug contact, approx. 7 m (23 ft)
long. Main and safety switch at the staircase on the gantry.
Anemometer and warning light for air traffix mounted on
the top of the tower.
Operating
Principle
The shiploader is first switched on at the staircase of
the gantry by switching on the main switch that is there.
Next, the main switch in the machine room must be switched
on. Control of the entire installation is done from the
control panel inside the control cabin for the high speeds
and from the portable control panel in the ship's hold for
the low speeds.
—
Operation with lock: Selection switch "Transportvergrendeling"
(transport locked) is on "MET" (with). All conveyor
belts are electrically interlocked and operate automatically.
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— Operation without lock: Selection switch "Transportvergendeling"
(transport locked) is on "ZONDER" (without). Each
conveyor belt can be started and stopped individually.
— Control from emergency stop: By operating one of these
switches, the control is switched off. All drives are stopped
immediately. When after this interruption of the work process
the control is switched on again, one can proceed automatically.
The audible signal for starting of the conveyor is sounded
as as warning.
Technical
Data
Product:
fertilizer, urea, cereals
Bulk
density: 1.2 - 0.6 ton/m3
Grain size: 0 - 3 mm
Bag dimension: max. 900x500x160 mm (35"x19.6"x6.29")
Bag weight: 50 kg / 110 lbs
Type of bag: paper, synthetic material
Top capacity with 50 kg / 110 lbs bags: 2.400 bag/hr
Ship size: max. 30.000 DWT
Main
dimensions of the shiploader
Type
of loader: SFT 30,0/13,0 u. 3,0/8,0
Span of gantry: 8.52 m
Travel distance of the quay: 200 m
Rail section water side: A75 DIN 536
------------------land side:
min. A100 special section with 220 mm
------------------wide head
Clearance below the gantry: approx. 8.5 m
Wheel diameter: 500 mm
Wheel pressure: water side max. 280 kN
-------------------------land
side max. 410 kN
Number of wheels per support - water side: 6 off
Number of wheels per support - land side: 4 off
Wheel base - waterside: 1.0 m
------------------- -land
side: 1.0 m
Distance between supports - waterside: 10 m
---------------------------------- -------land
side: 10 m
Overall width across buffer - waterside: approx.
16.4 m
----------------------------------
--- -- land side: approx. 14.3 m
Neutral position of boom upwards: +64°
Operating range of boom - upwards: +20°
--------------------------------downwards:
-15°
Boom
length: max.
31.5 m
Telescopic movement of the boom: 12.5 m
Spiral chute length: max. 16 m
Telescopic movement of the chute: 3 m
Operating range of loading head: min. 2.4 m
-----------------------------------------------max.
8.1 m
Operating speeds and motor power
Gantry
trolley: 5.0 + 20.0 m/min., 8 x 4.5 kW,25% ED
Telescopic movement of the boom: 1.0 + 5.0 m/min.
---------------------------------------------------2
x 22 kW, 25% ED
Hoisting gear of boom
Hoisting speed when boom is in horizontal position:
1.0 + 5.0 m/min. - 71 kW, 25% ED
Hoisting time of the boom: approx. 8.0 min.
Telescopic movement of spiral chute: 2.2 + 3.3 m/min.
(hydraulic pump):-------------------
--------- 15.0 kW
Bag
transport, transfer speeds and motor power
Bag
receiving roller conveyor:
1.5 m/sec., 2.2 kW
Round conveyor belt: 1.31 m/sec., 2.2 kW
Supply conveyor belt: 1.20 m/sec., 2.2 kW
Boom conveyor belt: 1.31 m/sec., 7.5 kW
Conveyor belt telescopic boom: 1.11 m/sec., 7.5 kW
Turntable loading head: 0.37 + 0.75 m/sec., 1.5/2.2
kW
Telescopic roller conveyor n° 1: 0.75 m/sec.,
2.2 kW
Telescopic roller conveyor n° 2: 0.75 m/sec.,
2.2 kW
Deployment telescopic roller conveyor (in the middle +
far end): 0.30 m/sec., 2 x 1.5 kW
Swinging arc of telescopic roller conveyor: 0.60
+ 1.20 m/sec., 0.22/0.40 kW
Detachable conveyor: 1.05 m/sec., 1.5 kW
Electrical
data
3-phase
current: 3 phases, 50 Hz
Main voltage: 3-ph 3 x 380 V + PE
Control voltage: 220 VAC, 50 Hz
Control voltage inside ship: 42 VAC, 50 Hz
Lighting: 220 VAC, 50 Hz
Installed power: 182 kW
Absorbed current in operation: 133 Amp
Protection: 250 Amp
Wind
load
Steel
structural elements according to FEM
Wind force when in operation = 245 N/m2 = 20
m/sec wind speed
Wind force when out of operation = 785/1085 N/m2
= 42 m/sec wind speed
Main
drives (rated power)
Wind force when in operation = 117 N/m2 = 14 m/sec
wind speed B7
Beaufort 8 : 17.2 - 20.7
Beaufort 9 : 20.8 - 24.4
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