Shiploader for bagged goods
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:
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.
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.
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.
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.
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.
— Operation with lock: Selection switch “Transportvergrendeling” (transport locked) is on “MET” (with). All conveyor belts are electrically interlocked and operate automatically.
— 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.
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
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°
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
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
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