zxc ® 28-Oct-2012 15:04

Marine Cargo Crane GPS 250-0818


Year: 2007
Language: english
Author: Norlift
Genre: GENERAL PURPOSE CARGO CRANE TECHNICAL SPECIFICATIONS
Publisher: Norlift
Format: PDF
Quality: OCR with errors
Number of pages: 41
Description: The crane is controlled remotely from a portable control box permanently hooked up to the crane slewing column.
All motions have stepless speed control from 0 to max.
In addition to the remote control, the crane may be controlled from a service platform on the crane by levers directly on the operational valve.
Stop/start of pump motor is done from push button box on the crane pedestal.
When the portable controlbox is not in use, it will be stored in a stainless steel cabinet on the platform.
This gives an excellent control of the crane as well as it allows the driver to be situated at the right place for best survey of the cargo at any time.
301 CHECK LIST BEFORE START-UP
1) Check oil level.
2) Check that control levers / joysticks are in neutral
3) Check wire rope.
302 START-UP
1) When starting up at low temperature, less than + 10°C, the oil temperature should be lifted up to + 10°C before crane is used.
2) If crane have special aggregate for heating the hydraulic oil, this aggregate must be switched on and run for a time to lift oil temp up to min. 0°C before main pump is started.
3) Cranes not having special heating aggregate should be started and run on idling condition until temperature is lifted to +10°C.
303 CRANE OPERATION
1) Check that hoist wire run correctly through the wire sheaves.
2) check functions of limit switches.
3) Move handles and joysticks gently.
4) Follow instructions on the crane or in the crane cabin.
304 CRANE PARKING
1) Park the crane with the jib in the jib support.
2) Secure hook block and tight wire. Do not overtight!!
3) Stop pump motor.
4) Check that motor still stand heat is on.
Norlift EMERGENCY 305

More...

This crane has been designed for emergency operation in case of loss of power.
Ref.: Hydraulic diagram, see section 10.
Lowering of winch
1) Connect hand pump’s suction line (1/2" hose) to pos.no: 409 (tank suction line) and pressure line (3/8" hose) to pos.no: 408 on winch lowering line.
2) If possible open bypass valve pos. no: 107 on winch.
3) Grab the winch operating lever and keep that in position for lower.
Eventually use a small rope to keep it positioned.
4) Rise the pressure with hand pump and load will start lowering.
Lowering speed will be higher and more suitable if the bypass valve (pos.no: 107) is opened.
Lowering will stop a few seconds after the hand pump is stopped.
If the lever for winch is set back to neutral position will the lowering stop immediately.
Lowering of jib
1) Open valve pos.no: 204 by turning adjustment screw AC until cylinder starts moving.
Open carefully and stand by with the tool ready to close the valve if the lowering speed has tendency to increase. (Speed increase is most actualy if the jib is lowered from a relatively high position.)
NOTE: Count no. of revolutions for resetting valve to original position.
Slewing
1) Connect hand pump to 409 (tank suction line) and 408 on slew, brake line, (See diagram).
2) Open valve 302.
3) Rise pressure from hand pump to release brake on slewing gears.
4) Pull jib into position by rope from the jib head.
Ref. HYDRAULIC CIRCUIT A1-6392-2
The hydraulic system is of the open loop type using a fixed volume pump submerged in the hydraulic oil tank. The main pump is driven by a electric motor located in crane pedestal.
The oil flows through the main dir. valve, filter and back to tank.
Oil flow can be directed to the different motions by pulling the manoeuvring handles.
Two functions may be operated at the same time, but then the max. speeds will be reduced.
The winch motor is equipped with a load control / pipe rupture valve securing that the load will not drop even in case of hose break. The winch is equipped with hydraulic limit switch valves making the hook stop automatically in top and bottom position.
The jib cylinder is secured by the load control / pipe rupture valve.
The slewing function is secured for travelling at list by double set of load control / pipe rupture valve.

CRANE TECHNICAL SPECIFICATIONS CONTENTS

ELECTRO HYDRAULIC
DRIVE SYSTEM
DESIGN RULES
DESIGN TEMP
MAIN DATA
MAX LIFTING CAPACITY
MAX OUTREACH
MIN OUTREACH
HOOK TRAVEL
HOOK SPEED
Empty hook
Fully loaded hook
SLEWING SECTOR
SLEWING SPEED
LUFFING TIME (AVERAGE UP/DOWN) LIST/TRIM
ELECTRIC DATA:
SHIP POWER SUPPLY
AMBIENT TEMP. -10°C TO +45°C HIGH HUMIDITY CONDITIONS
Harbour Open sea
SHIP CONTROL SUPPLY
MOTOR RATING
Enclosure
Insulation class
Type starter
Starting current

2. SAFETY / 3. MACHINERY / 4. POWER PACK / 5. ELECTRIC SYSTEM / 6. STEEL / 7. SURFACE TREATMENT / 9. FEATURES

2. SAFETY SYSTEMS
Load Limiting system
The main hydraulic circuit is protected from overpressure by a relief valve.
In addition each hydraulic circuit is equipped with a relief valve, set to value corresponding to the crane capacity.
Hook stop
The hook movement will be automatically stopped in top and bottom position by hydraulic operated limit-switches.
Luffing stop
The luffing cylinder is designed for safe buffering in the extreme positions.
Fail Safe Brakes
Both winch motor and slewing motor are provided with oversized fail safe brakes.
The brakes are spring operated and pressure released.
Load holding valves
Winch motor, hydraulic cylinder and slewing motor are all provided with load holding valves which will freeze the movement in case of hose rupture or other failure causing pressure drop.
3. MACHINERY
Slewing machinery
Consist of a ball or roller bearing slewing ring seated on machined surfaces.
Slewing ring bolts and nuts are made from special alloy steel and tightened up to an exact tension, the slewing rings are all provided with internal gearing.
Slewing motor, brake and gear are built together to one complete unit.
Luffing cylinder
The jib luffing cylinder is designed for marine use with spherical bronze bearings at both ends.
Hoisting machinery consist of:
Grooved drum with roller bearings and brackets. Winch gear built into the drum with brake and hydraulic motor.
Flange mounted load holding valve.
Flange mounted hydraulic hook stop.
All wire sheaves are provided with double roller bearings on steel axles.
All bearings have grease nipple lubrication.
4. HYDRAULIC POWER PACK
Hydraulic Power Pack consist of an electric motor mounted vertically in the center of the pedestal, driving the hydraulic pumps located in the crane house.
The hydraulic oil circuit include a full flow return filter with changeable filter insert.
Oil cooler
The crane is designed for continuos use in hot climate and provided with an oil cooler to keep the
hydraulic oil temperature within acceptable limits.
Hydraulic pipes and hoses
All external mounted pipes are of stainless steel type.
Hydraulic fittings are of the flared type (J.I.C.37°).
Hydraulic hoses are made from rubber types with special good resistance against sea environment. All hose assemblies are tested with 50% overpressure before they are mounted on the cranes.
Hydraulic pumps are designed for continuos operation at 280 bar.
Max pump pressure in our system during normal operation is approx. 250 bar.
5. ELECTRIC SYSTEM
Pump motor
The electric pump motor is of marine type.
Type of enclosure IP44. Class of insulation "F".
Ratings are given based on 45°C ambient temperature and 70° temperature raise.
Motor will be provided with anti-condensation heater for 220V.
Duty: S6 - 40% ED.
Motors will be protected by thermic relays.
Star/delta Electric Starter
A Star/delta starter in IP 44, enclosure will be supplied as a loose item for mounting in deck housing.
The starter will as standard include following features:
Transformer for control voltage.
"Heater on" lamp (blue).
6. STEEL STRUCTURE
All structural steel used in our cranes will be supplied with certificate 3.1.b. according to DIN standard.
The quality is selected in accordance with classification societies requirements, to obtain necessary ductility for the lower temperature design limit.
All important welds are carried out in accordance with welding procedures and NDT check before painting.
7. SURFACE TREATMENT
Exterior
Abrasive blast clean of all surfaces to SA 2,5, SIS 055900 .
Primer:
Zinc rich epoxy, two pack.
Dry film thickness 30-40 microns.
Intermediate coat:
Two pack mastic mio.
Dry film thickness 125 microns.
Final coat:
Epoxy finish.
Dry film thickness 50 microns.
Ladders and platforms:
Will be supplied hot dip galvanized and painted.
Interior Crane house
Abrasive blast and clean of all surfaces to SA 2,5, SIS 055900.
When the crane house is utilized as a tank for the hydraulic oil, it will be primed with two pack zinc rich epoxy primer, 30-49my.
Interior in pedestal
Abrasive blast clean of all surfaces to SA 2,5, SIS 055900.
Primer:
Zinc rich epoxy primer two pack.
Dry film thickness 30-40 microns.
Intermediate coat:
Two pack mastic mio.
Dry film thickness 75 microns.
Final coat:
Epoxy finish (white).
Dry film thickness 40 microns.
9. SPECIAL FEATURES
Offshore and union purchase use.
This crane is specially designed and equipped with features to ensure an efficient and safe handling of cargo in open sea condition, either used as single crane or in union purchase.
When operating in offshore condition, to have 1 part reeving is important. This ensures a safe cargo handling with less chances for personnel or material damages.
This crane has in addition a high speed motor with autovariable hoisting speed which is also required to ensure the above.
This element is also required by any significant world wide authority for allowing the crane to operate in open sea condition.
When operating in union purchase the triangular lifting pad is to be used. The light hook in addition to the drivers control which is portable ensures a perfect operation together with any kind oflifting rig.
REV ALTERATIONDATE / SIGN
Rating: 4.5 / 5 (Votes: 11)
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