Categories | Launcher Crane |
---|---|
Brand Name: | Dowellcrane |
Model Number: | JQJ Beam Launcher Girder Crane |
Certification: | ISO CE BV CCC GOST SGS |
Place of Origin: | China (Mainland) |
MOQ: | 1 Set |
Payment Terms: | L/C, T/T |
Supply Ability: | 5000 Sets per Year |
Delivery Time: | 60days |
Packaging Details: | Electric and other parts are packed by high quality plywood crates, Main girder packaged by plastic film and woven plastic cloth |
Max lifting height: | 10M |
Lifting speed: | 0-1m/min |
crane travel speed: | 5m/min |
Condition: | New |
Span: | 20-50m, 20-50M |
trolley cross travel speed: | 4.5m/min |
Company Info. |
Henan Dowell Crane Co., Ltd. |
View Contact Details |
Product List |
Highway Precast Bridge Beam Launcher Girder Erection Crane 200 Ton
Product Description
Highway Precast Bridge Beam Launcher Girder Erection Crane 200 Ton is a professional construction machinery with excellent performance, easy operation and safety structure. The main girder of erection crane is designed with a four sides truss structure, and is welded using structural steel and steel plates to provide a lightweight and strong wind resistance.
Construction Plan
Highway Precast Bridge Beam Launcher Girder Erection Crane 200 Ton
is suitable for the installation and erection of precast concrete
beams, and has wide adaptability to inclined bridges and curved
bridges. Its characteristics are:
(1) Highway Precast Bridge Beam Launcher Girder Erection Crane 200
Ton uses the central supporting wheel set and the rear drive to
support the main beam through hole. The rear drive and the
beam-carrying car go on the same track and are synchronized in
three directions. The gauge can be adjusted arbitrarily according
to the bridge width. It is crushed, so it is safer and more
reliable. There is no need to lay any auxiliary track, thereby
reducing the track laying time and labor intensity, and improving
the via efficiency of the bridge erecting machine.
(2) Highway Precast Bridge Beam Launcher Girder Erection Crane 200
Ton relies on itself and the suspended concrete beam to balance the
vias. The bridge crane can make holes in any part of the bridge
width. After passing through the hole, the front traverse beam
track can be hoisted once by the preceding crane. The front oil
cylinder is used as the auxiliary leg to adjust the height, which
reduces the manual transportation time and labor intensity.
(3) The front support point of Highway Precast Bridge Beam Launcher
Girder Erection machine's via is the middle beam and the traverse
wheel group. During the bridge machine's via, the front fulcrum
wheel box can be used to adjust the bridge's main beam at any time
during the traverse along the traverse track. Hole direction, can
meet the requirements of vias on curved bridges with very small
radius
(4) By adjusting the short sections of the front and rear support
pipes, it can be adapted to the erection of bridges with slopes
below 5%.
(5) Increased driving force when going uphill due to the addition
of the rear support and its wheels, and
The braking force when going downhill makes the bridge safer to
use.
(6) The width of the front frame and the rear upper and lower beams
can be adjusted, and the width of the frame beam is not changed, so
it is suitable for inclined bridges of 45 degrees and below.
1) The bridge captain must be staffed by more than three years of
work experience, trained to obtain a certificate, and holding a
crane industry certificate. The bridging captain is the first
person responsible for the safety of the bridging team.
2) The safety officer must be a person who has three years of work
experience, understands construction technology, and has a strong
sense of responsibility. The safety officer is fully responsible
for the safety of the team's construction.
3) The beam leader and lifting leader are staffed by a person who
understands technology and has a strong sense of responsibility.
Take the first responsibility for safe production in this class.
4) The above personnel, electricians, cranes, and welders must be
trained and certified to work.
The main structure of the Highway Precast Bridge Beam Launcher
Girder Erection Crane 200 Ton consists of the main beam, the upper
beam and the front frame, the hoisting crane, the supporting
traverse wheel set and the track system, the supporting wheel
mechanism, the front hydraulic jacking mechanism, the rear drive
device, the beam transport flat car, and the electrical system etc
composition.
1) Main beam: adopt "A" cross section, the pin connection is
assembled according to the number. 2) Hoisting cranes: There are a
total of two cranes. The hoisting mechanism is composed of a hoist,
a pulley set and a spreader. Lifting the concrete beam completes
the vertical and horizontal operation of the concrete beam and
controls the installation of the concrete beam in place.
3) Front and rear supporting traverse wheel sets and track system:
Use the supporting lateral moving wheel sets to adjust the
direction of the bridge machine's hole to meet the requirements of
curved bridges.
4) Supporting wheel mechanism: A mechanism that realizes the
longitudinal movement of the bridge girder.
5) Rear drive device: It acts as a rear support and also plays a
role of rear drive to drive the bridge via.
6) Girder transport: equipped with two girder transporters, the
driving speed is controlled by frequency conversion to ensure that
the girder transporters and bridge crane are synchronized;
7) Electrical system: the source of the power of each mechanism,
through various corresponding protections, the main circuit and the
control circuit can operate safely.
1: According to the actual weight of the Highway Precast Bridge
Beam Launcher Girder Erection Crane, each section is 12 meters
long, weighs about 9 tons, the center weight is 11 tons, and the
crane weighs 8 tons. After the 25-ton car hanger is used to
assemble the center bracket, the rear support is assembled The two
main beams are assembled together with a 25-ton automobile hoist,
weighing about 18 tons. The two-ton automobile hoist is used to
suspend and support the main beam of the main beam hoisting device,
and then assembled with a single beam. Just hang it. The center
distance of the main beam is determined according to the maximum
width of the concrete beam. The center distance of the main beam
can be adjusted according to the width of the beam. The center
distance of the main beam is generally adjusted to the maximum to
ensure the stability of the bridge frame beam and the retreat. The
length of the supporting wheel set, the overhead frame, the rear
upper beam, the front frame, and the tie rods are guaranteed to be
the same. The track gauge of the rear drive should be consistent
with the track gauge of the flat beam for transportation. It can be
adjusted between 3m and 4m as needed; according to the actual
situation on the site, it should be adjusted as wide as possible to
facilitate the stability of the Highway Precast Bridge Beam
Launcher Girder Erection Crane.
2: install the middle support traverse track and the middle beam
and the middle support wheel box on the roadbed or bridge deck.
3: Install the main beam of the last section of the Highway Precast
Bridge Beam Launcher Girder Erection Crane on the reverse
supporting wheel set.
4: laying the track and installing the rear driving device and the
riser, the rear oil cylinder, and the rear upper beam. The long
main beam is connected section by section. After each section is
activated, the driving device advances the main beam backward.
5: Install the front traverse track, the front support wheel set
and the front cross leg lower beam on the bearing or cover beam of
the first hole. Install the front frame on the main beam.
6: Install front legs and front hydraulic lifting support devices
on the main beam. If the front leg is installed on the subgrade,
the riser should have the short section removed.
7: Install the Highway Precast Bridge Beam Launcher Girder Erection
Crane , beam flat car and electrical appliances;
8: Refueling, commissioning and via preparation.
Step 1: Via preparation. Drive the beam-carrying flat car equipped
with concrete beams to the rear of the bridge crane for
counterweight, and test run the whole machine;
Step 2: Use the oil cylinder to raise the front and rear
outriggers, use the front crane to move the middle support reverse
supporting wheel group to the abutment, adjust the front and rear
height of the main beam, and use the 3T hand hoist to retract the
front outriggers. The twine twisted forward and pulled up.
Step 3: Drive the beam-carrying flat car equipped with concrete
beams to the rear of the bridge erecting machine for counterweight,
and the crane after the bridge-carrying machine pulls the
front-carrying flat car equipped with concrete beams.
Step 4: After driving, the driving device and anti-roller device
make the bridge pass through the hole longitudinally.
Step 5: Use the horizontal moving wheel set under the middle
support to adjust the centering of the bridge hole through the
bridge to meet the requirements of the curved bridge.
Step 6: The bridging machine has holes in place;
Step 7: Four front hydraulic cylinders are rotated downwards and
supported on the cover beam as auxiliary front legs.
Step 8: Use the front crane to hoist the front traverse rail
through the hole once and place it under the front walking wheel
box. The timber supports the front traverse track, pay attention to
make the front traverse track straight;
Step 9: After the Highway Precast Bridge Beam Launcher Girder
Erection Crane is adjusted, the middle beam and the main beam are
tightened back and forth with four hand hoists.
Step 10: Test run the traverse mechanism, check whether the front
and middle traverse tracks are parallel, and prepare the girders.
After the longitudinal operation of the bridge erecting machine is
in place, a comprehensive safety inspection must be carried out to
check whether the bolts and pins are firmly connected, whether the
electrical wiring is correct, whether the wires are damaged and
squeezed, whether the hydraulic system is normal, and whether the
track joints are smooth. Whether the position switch is reliable,
the braking torque is appropriate, and the span and gauge are
correct. At the same time, clean up the debris on both sides of the
traverse track, and then test the bridge machine twice on the
traverse track. After all is normal, the concrete beam can be
hoisted.
1) The concrete beam to be installed is transported to the main
beam at the rear of the bridge crane by a beam-carrying trolley.
The rear oil cylinder is propped up and stringed up with the riser
pin. Then the crane is used to lift the crane. After lifting the
beam, the main lifting braking torque must be adjusted. The crane
and the rear beam trolley run synchronously until the rear crane
crane lifts the beam. Both cranes run at a speed of 3.08m / min,
advance into place, and then After the support is stowed, the whole
machine is horizontally installed in place. If the side beam is
erected, the cart must be moved to the maximum position for two
days before the whole machine is moved to the landing beam. , And
then the whole machine traverses to the falling beam. After the
concrete beam is dropped, the new frame beam and the previous span
beam should be welded firmly at the end with not less than two
threaded steel bars of ≥φ20, if it is a T beam When it is in place,
it is necessary to add strong temporary support at both ends. In
addition to the temporary support after the second beam is in
place, the steel bars at the two ends of the diaphragm beam are
quickly welded to enhance the stability.
2) The installation sequence of concrete beams: firstly, the side
beams on both sides, the middle beams, and finally the middle are
closed.
3) Erection of the first span beam:
When the first span of the bridge is set, the middle beam and the
traverse track are generally on the abutment. At this time, the
lower soil must be compacted to prevent the bridge crane from
sinking during the beam erection process, which may cause an
accident. (The erection of the first span beam, the bridge erector
is not familiar with everything at the beginning, do not pursue the
speed of the bridge, safety first).
4) Erection of the last span beam: The opposite side of the last
span bridge is the abutment. The front legs of the bridge erecting
machine must run on the abutment, so the height of the outriggers
must be reduced.
5) Working requirements of bridge crane:
① Before each longitudinal movement of the bridge erecting machine,
each hole requires that all the steel beams of the diaphragm beam
are completely welded and the concrete at both ends of the
diaphragm beam and the middle has been cast to the strength
required by the design. It can only be moved longitudinally with
the consent of the supervisor.
② T-beams should be provided with temporary supports at both ends
when they are in place. The main function is to keep the beam
vertical and stable and prevent overturning displacement.
1. The squad leader and the workers of the main types of work must
be trained to get on the job. Persons entering the scene must wear
hard hats and must wear safety belts for aerial work;
2. It is strictly forbidden to pass through the machine at night,
and crew members are strictly prohibited from working under the
influence of alcohol.
3. The front and middle traverse tracks must be laid horizontally,
and the two tracks must be parallel. The personnel must be in
place, the division of labor must be clear, the responsibilities
must be clear, pay attention to observation, focus on the energy,
the vias must be in place once, and there should be as few stops as
possible. The signal can be walkie-talkie or other methods but must
be reliable. After the vertical movement of the bridge crane is
completed, the center support It must be fastened with the hoist in
both directions forward and backward with the main beam;
4. In the working state of the bridge erecting machine, two rails
must be installed on the rails. It is strictly forbidden to operate
above the fifth wind, and the cable erecting machine is used to
stabilize the bridge erecting machine. When the bridge erecting
machine stops working, the wheel of the traverse wheel box must be
plugged with wooden wedges. And cut off the power, anchor with
anchor rope;
5. When the bridge erecting machine starts working every day,
safety inspection must be carried out, and the operation order can
be issued only when there are no hidden dangers. A comprehensive
inspection must be performed for each erected hole, and the
experience and lessons can be summed up in time to allow each
member to take a step forward from it. Stop working when you find a
problem, and continue to work after timely processing;
6. It is strictly forbidden to carry out the lifting operation of
the crane and walking with the beam;
7. Highway Precast Bridge Beam Launcher Girder Erection Crane
operation must clearly define the division of labor, unified
command, full-time commander, full-time operator, full-time
electrician and full-time safety inspector.
8. It is necessary to operate according to the instruction manual
of this machine and use the bridging machine.
On-site Installation