How to operate HZQ59/80 bridge girder launching gantry?
Installation in the factory
HZQ59/80 bridge girder launching gantry is of non-standard equipment in worksite, some temporary works should be done in worksite in service process, which is important. Pier cap fixed block and lateral moving plan satisfy demands of the first site. In the later use, construction companies should make corresponding pier cap fixed block and lateral moving plans according to practical situation of bridge and pier caps. It demands the pier cap fixers must be stable and reliable, and piers plan can meet the demand of crossing piers for the bridge girder launcher.
900t bridge girder launching gantry for high-speed railway
(1) Brief introduction
900t bridge girder launching gantry
Scope of application and purpose
- can bridge full span box-type prestressed concrete girder for double track special railway passenger line with straight line, curve line(radius >2500m),longitudinal gradient 20‰,32m,24m,20m equal span or changing span
- erect bridge girder at the beginning and at the end
- cross one pier to another pier by automatic shifting
- two ways to shift between bridges: carried by girder transporter and automatic transfer
How to Install and Dismantle HZQ50-150 Bridge Girder Launching Gantry
(1) Installation and test run
Launching gantry in the worksite
The bridge girder launcher is of heavy bridge construction equipment, to ensure its normal work, it is necessary to operate the machine in accordance with operation instruction manual and current related rules.
● Install the bridge girder launcher
A. Personnel and equipment
a. personnel: 8-10
As a large-sized special equipment for constructing a bridge, only with clear, definite division of labor and uniform command, only with full-time operator, full-time electrician, full-time safety inspector, the bridge girder launcher can work normally. To ensure construction safety, there must have strict construction organization and measures. The basic personnel conditions are as follows:
What’s the composition of the launching crane ?
Launching Gantry
Bridge girder launcher is made up of main girder, lifting trolley, front auxiliary legs, front legs, middle legs, rear legs, middle auxiliary legs ,rear bracket,electrical system and hydraulic system etc.
What are the advantages of bridge girder launcher for highway?
ZQ32/165T bridge girder launcher(zzhz.com) is designed for highway and railway. According to the situation of present railway with less sub grade, more bridges and tunnels which connected too closely, our company learn from advantages of other launchers at home and abroad and close the gap, after amend the drawings many times, ZZHZ(zzhz.com)designs and makes this new box-girder bridge launcher(double girder).
a. Low height, narrow width, light weight and compact structure. The whole set can pass through the tunnel; what’s more, it can feed girder and erect girder in tunnel.
b. The weight of the maximal part is no more than 6.6t and the length is no more than 10m which can meet the vehicle transportation rules.
c. To meet the requirement of the limit of present railway, it can work under the condition of multiple tracks.
d. The symmetrical design of main girder, and to reserve the hole of bolts to erect girder bidirectional and shift span for erecting
e. Auxiliary trolley and upside-down charging gantry are added, and it has quite complete function which can lay track. It can erect the girder of highway after modification.
f. It can move a long distance on the rail with self- power
g. Compact structure, easy to install and maintain for users. It only needs to disassemble partially when transfer site by train, the upside-down charging gantry can fold and pack by itself without a hoisting machine.
Bridge Girder Launcher
How to Make the Trial run of Bridge Girder Launcher?
Launching Gantry
Checking the connection parts is firm or not.
Checking the electrical connection is correct or not.
Checking the hydraulic system
Checking mechanisms and parts
Checking the lubrication of rotating parts
Checking the fuel level and try to run the hydraulic system
pour the # 32 hydraulic oil into the fuel tank from oil filling port( old #20)
What are safety guarantee measures of bridge girder launcer?
Launching Gantry
ZZHZ has very rich experience of producing bridge girder launcher, therefore, it can give ussome advice about the safety guarantee measures:
4. Safety measures for longitudinally moving girder
Thoroughly check bridge construction machine and rail before longitudinally moving girder. If there is a problem, solves it at once. Observe stress condition of rail and sleepers during process of longitudinally moving girder, promptly deal with it if there is a trouble.
What’s the fabrication process of bridge girder launcher?
a. the bridge girder launcher mainly uses Q235B steels: the butt welds of cover board and web board, the outer lead weld of cover board and web board adopts Lincoln weld, other welds use CO2 gas shielded welding; welding material: welding rod of Lincoln weld H08A, and HJ431; welding rod of CO2 gas shielded welding: ER50-6; the electrode of tack welding uses J422 when the machine is assembled. The 100% ultrasonic inspection should be done for butt welding, the acceptance standard is GB11345-89, and the grade of welding quality is I grade; the welds between cover board and web board adopt melt thru weld, the 100% ultrasonic inspection is done after welded, and I grade is qualified. All of T joints do X-ray detection, the acceptance standard is GB3323-87, and the grade of welding quality is II grade.
b, sand-blasting should be done after the welding is finished, and the derusting grade is Sa2.5; the casting wheel need to do annealing treatment; the NC cutting machine is demanded to cut the steel plate which thickness exceeds 10mm; CNC boring machine is used to process the wheel holes of traveling wheels; the press is used to install the bearing.
c. The paint should be the special paint for engineering machinery, the first layer of outer surface is epoxy zinc-rich primer, the middle layer is epoxy cloud iron paint, and the last two layers is polyurethane paint. The total thickness of paint shouldn’t less than 125μm, and the deviation of right and left is 5μm.
Bridge Girder Launcher
what are the operating requirements of bridge girder launcher?
Launching Gantry
（1）Adjusting the height of transverse rails of front legs and middle legs when erecting girder or moving from one pier to keep main girder’s longitudinal slope≤0.5%，transverse slope≤0.5%.
（2）there should be a commander who directs the order at the present site, and the front legs must be firm, and someone who checks it specially.
（3）perfect checking mechanism should be established. Before construction, construction and after construction of per span of the bridge girder launcher should be checked, finding the questions and deal with them timely to make sure the construction can be done safely.
What’s the features of walking type bridge girder launcher?
Bridge Girder Launcher
1、Application range and use of bridge girder launcher:
It is mainly used for lifting of concrete girder in bridge construction of general railway and highway.
