Safety Devices; Load Moment Indicator; Three-Color Load Alarm Light; Winch Brake - SANY SCC 2600A Manual

SANY CRAWLER CRANE
SCC2600A

Safety Devices

1） Load moment Indicator
The SCC2600A-type load moment indicator is a
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overload protection system specially designed for
the Sany SCC series boom crawler crane, with the
performance structure parameters of all Sany series
crawler cranes stored directly in it, such as load curve,
boom weight, center of gravity and other geometric
parameters. The moment calculation adopts the
targeted optimized model with tailor-made advantage,
integrating Sany' s technology accumulated over
years in the area of crawler crane. It ensures lifting
s afet y, ma x imize s t he ut iliz at i o n ef f ic i ency by
avoiding technology disjunction and after-sale service
difficulties caused by different manufacturers of the
crane and LMI, so as to enhance quality of the whole
machine.
As an independent safety control system completely
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controlled by a computer, the load moment limiter can
automatically detect the load weight, working radius
and lifting boom angle, and compare them with the
rated load capacity and actual load, rated working
radius and rated boom angle. Under normal operating
condition, it can intelligently judge and automatically
cut off the crane moving towards danger direction, It is
also equipped with black box to record the overloading
information.
Its main components include display, controller, angle
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sensor and force sensor.
2） Three-color Load Alarm Light
Its corresponding moment limiter display can show the
load progress bar state, reflecting the safety status of
lifting load.
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3） Main and Auxiliary Hoisting Limiter
When the lifting hook is raised to the height limit, it can
send produce the alarm message and while cut off the
lifting action of hook.
4） Lowering Limiter of Main and Auxiliary
Winch
When the wire rope releases to the last three loops, it
can send produce the alarm message, so the electrical
control system can automatically cut off the lowering
action.
5） Switch between Assembly/Operation
Mode
In assembly mode, over hoisting limiter, boom angle
limiter and load moment indicator will be bypassed for the
assembly of the crane. In operation mode, all safety limit
devices will function.
6） Lifting Boom Limit Detection Device
Under dif ferent operating c onditions, through the
detection of the limit switch and the boom angle signal of
force limiter system, the crane boom or jib can operate
within the safety angle.
7） Lifting Boom Back-stop Device
The boom adopts the cylinder back-stop structure,
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with the larger compression and amount, the greater
back-stop force. The maximum output force of back-
stop cylinder is 38t.
There is a pair of mechanical back-stop device on the
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rear mast of luffing jib, to prevent the mast overturn roll
backward and to tension the rear mast pendant bar.
If the angle between jib and boom is too small, the
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cylinder back-stop device can prevent it overturn roll
backward, with the maxim output force of back-stop
cylinder of 50t.
8） Winch Brake
All winch brakes adopt the spring-loaded normally closed
disc brakes, which are characterized by the larger braking
force, free maintenance, safe and reliable operation and
long service life.
9） Monitoring System
With the high-definition camera adopted, the operator in
the cab can monitor the real-time states of luffing drum,
lifting winch drum and vehicle rear through the monitor.
10） Self-diagnosis System
It can automatically give the fault alarm message, and
check the work powered state of electrical circuit, to
quickly eliminate the electrical fault.
11） Phraos
It is mounted on the top of boom, to give the boom
altitude lighting, so the boom lowering at night is not
needed.
12） Anemometer
It is installed at the top of boom, to measure the wind
speed in real time, and to transfer the data to the monitor
display in the cab.
13） Level Gauge
The bubble level gauge is adopted as the validation basis
and the electrical level indicator is adopted to give the
high-precision display in real time, showing the crane
tilting angle and informing the crane safety working
ground environment.
14） Hook Latch Device
There are baffle on the hook to prevent the wire rope fall
off.
15） Operating Alarm
Before any operation, press the horn to give an alarm,
informing the crane will start work operation done now
and other staff to pay attention to danger.
16） Traveling or Swing Alarm Message
In traveling or slewing operation, the working alarm lamps
flashes, accompanied by a buzzer sound.
17） Function Lock
If the operator leaves the seat or the function locking
handle is not at the proper position, all other functional
control handles will not be working so as to are invalid,
thus effectively avoiding misuse.
18） Automatic Reverse Traveling
No matter what the relative position of superstructure
and chassis is pulled forwarded, the vehicle will travel
for ward; if pulled backwards, the vehicle will travel
backward.
19） Monitor Display
The high-precision true color display with that is the
vehicle electrical man-machine dialogue display terminal
can show the working state and real-time parameters of
engine system, hydraulic system and electrical system.
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