Schwing 30100750, Руководство по эксплуатации

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Operation
All SP Rock Valve Models
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Operation Manual -
75
• Check the load bearing capacity of any slings,
cables or other lifting devices that will be used
to lift the machine. Never exceed the rated
working capacity of the lifting device.
• No one is allowed to walk, stand, or work
under suspended loads. Keep the area free of
personnel.
Unit Set-Up
Selecting the proper set up location on the
job site.
Sometimes, the person in charge of the pour will have a
spot ready for you. If he is experienced, he will pick an
appropriate spot that will allow a safe and efficient
pour. Other times, the person in charge will only tell
you what is to be poured, and it will be up to you to
select the set-up location. In still other cases, the
person in charge will have picked a totally
inappropriate spot for you. In these cases, your ability
to be an effective diplomat may dictate how the day is
going to go for you. If it is not already so, you will have
to make the location safe and efficient on your own. In
all cases, the set-up point MUST allow at least one
ready-mix truck to get safely to and from your hopper
and if you are pumping in an area where exhaust fumes
may linger or be confined, proper ventilation must be
assured.
In addition to the above mentioned requirements , it is
desirable that the set-up point also have these features:
• Able to handle the safe arrival and departure of
2 or more ready-mix trucks. This means
obeying the 1 to 1 rule by staying at least one
foot back from excavations or cliffs for every
one foot of distance to the base edge.
• Out of the way of major traffic flow patterns
for the job site. If no one can move on the site
because of your setup position, you will have
to move anyway...you might as well plan for it
at the start.
• If your unit has hydraulic stabilizers, jack them
down only until they feel the weight of the
unit. Always leave the tires in contact with the
ground.
• The area to be utilized must be as level as
possible.
• If the workplace has inadequate lighting, don’t
begin the pour until proper lighting is provided
Laying out the pipeline
We will not cover the do’s and don’ts of pipeline layout
in this manual. If you don’t know how to correctly lay
out a pipeline, read and understand the chapters on
concrete pipeline in one of the books about pumping
concrete. Several of these books are listed under the
heading “Additional Reading Material”, found on page
7-42 in the Appendix section of this manual. We will,
however, cover of few specific points that are common
to pumping jobs in North America.
Start at the point of discharge and work your way back
to the pump. In the majority of cases, you will need
rubber hose at the point of discharge, and usually the
placing crew will prefer 3" or 4" rubber hose to 5".
This means that you will need a reducer at the
discharge end.
If you will have to reduce to smaller diameter pipe or
hose for the placing crew, always make the long part of
the run with the larger diameter, and reduce as close as
possible to the point of discharge. There is one instance
where it may be desirable to run the entire distance
with the smaller size, and that is if you will be pumping
very, very slowly on a hot day. In that case, the
concrete may start to set before it reaches the point of
discharge, and it will resist the change of size that is
required inside of a reducer. If you suspect that you
may have a job like this booked, call the Schwing
Service Department for advice before you set up the
job.
Use as few hoses as possible. Hoses have more
resistance to flow than pipe does, therefore it will take
higher pressure to push through hoses than pipe.
Use the largest diameter hose that the crew will let you
use. The diameter of the hose directly affects the
largest size stone that you will be able to pump. If you
will be pumping stone larger than 1", you will not be
able to use 3" or smaller hose. To attempt to do so will
result in blockages.
Do not use hose for changing pipeline direction. Pipe
elbows are available with many different degrees of
bend, and they will require less pumping pressure than
hose.
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