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.
What are wind resistance measures for HZQ59/80 bridge launching girder machine?
Wind resistance measures for HZQ59/80 bridge launching girder machine
Safe wind resistance is also an important daily job as operating the HZQ59/80 bridge launching girder machine, professionals to monitor and check is necessary.
launching girder machine on the bridge piers
What Do You Know about HZQ59/80 Segmental Assembly Bridge Girder Launcher?
(1) Overview
According to field working condition in Singapore, combined with ZZHZ successful design experience of bridge girder launcher, HZQ59/80 segmental assembly bridge girder launcher is designed as honeycomb type double girder machine, which features as below:
delivery site
What is the structure and working principle of HZQ900t bridge girder launcher?
900t bridge girder launcher
HZQ900t bridge girder launcher is designed according to actual working conditions such as multi-girder types for special passenger line, large lifting capacity, high construction precision and better adaptability of curved bridge and skewed bridge construction.
HZQ900 type bridge girder launcher is mainly made up of main girder and front, rear cross girder; front lifting trolley, rear lifting trolley, rear part winch system; front leg; rear leg and rear leg bogie; auxiliary leg and bogie; guide beam; cantilever beam and auxiliary trolley; control cabin and electrical control system; hydraulic system and power system, safety protection device and other parts
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
What Should You Know about ZZHZ Service?
ZZHZ logo
1. How about the payment terms?
Pay 50% of the total price by T/T after signing the contract, another 50% will be paid by irrevocable L/C at sight
2. How about the time arrangement?
We will set HZQ50/150 launching gantry as an example, it will be shipped to Chittagong, Bangladesh from Zhengzhou, China
- After signing the contract, we will arrange to produce products. Usually the period of production is about 60 days
- Then arrange shipment in Tianjin Port, China, it will takes 15 days
- From delivering goods to receiving goods, it may takes 40 days bulk loads transportation
- Installation and commissioning period: about 30days
Kindly notice: The whole process may takes about 5 months (150 days), please make an early preparation to meet the requirement of time limit for a project
3. Quality assurance
a. We promise to provide a brand-new product in accordance with all technical qualification described in the materials
b. We are responsible for safety accident of the product caused by product design and manufacturing
4. After-sale service commitment
Our quality policy: careful manufacturing, quality first, customer supreme and sustainable development
- We will guide you to install and commission the products produced by our company
- We will send two technicians to buyer’s worksite to train their stuff if needed, but the buyer should be responsible for their food and accommodation, salary and round trip tickets
- 1 year quality warranty, lifetime maintenance service
- We will provide a list for wearing parts and prepare them for the buyer if needed.
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:
How Does HZQ50-150 Bridge Girder Launcher work?
(1) The use of the bridge girder launcher
The bridge girder launcher 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.
HZQ50-150 Highway Bridge Girder Launcher for Bangladesh Project
(1). General Overview
HZQ50/150 walking type bridge girder launcher is a new type bridge construction crane developed by ZZHZ to meet the market demand, according to practical working condition in Bangladesh combining successful experience of ZZHZ and other companies, main features of the bridge girder launcher are as follows:
1. Unique honeycomb girder is firstly made by ZZHZ, featuring light self-weight, large load and high wind resistance;
2. New type and reasonable structure, the bridge girder launcher takes construction characteristics of modern bridges into account, use CAXA to design the model, so it has a more extensive adaptability;
3. The bridge girder launcher uses ANSYS finite element software to optimize the structure, making the bridge girder launcher has a light weight and high stiffness;
4. Middle support legs do not move on the bridge deck, it is unnecessary to lay longitudinal sliding rails, which reduces the pressure on the bridge deck as well as saves construction cost, thus the bridge girder launcher has a larger adaptability to the box type precast girder.
5. The bridge girder launcher uses support legs to move forward by itself, so it can better adapt to longitudinal and lateral slope in the actual working condition as well as make the bridge deck bear safer and more reasonable force;
6. Front support legs and middle support legs can be adjusted at random, core plate has adjustable angle, which make the bridge girder launcher better adapt to construct curved bridge and skew bridge; as constructing the skew bridge, the position of front support legs and middle support legs can be changed according to the angle of skew bridge, the machine can construct skew bridge with angle below 45°.
7. Adding transverse moving trolley as the lifting trolley, the complete machine can move transversely to the right place with boundary beam, safe, reliable, simple and fast;
8. Main girder and main connection structures of the complete machine adopt mature pin connection structure, stable, reliable as well as fast assembly and disassembly (striking a pin only needs several minutes).
pins for HZQ50-150 bridge girder launcher
(2). Technical regulation and design standard
1) Road bridge reinforced concrete and prestressed concrete structure design codes TB1002.3
2) Crane design standard GB3811
3) Crane test standards and procedures GB5905
4) Hoisting machinery safety codes GB6067
5）Design code for steel structure GB50017
6) Technical safety standards for special equipments TSG Q7002、Q0002
7) General assembly technology requirements JB/ZQ400.9
8) General technology requirements on weld assembly JB/ZQ400.3
9) Fasteners mechanical properties GB3098
10) Low-voltage apparatus basic standard GB1497
11) General technical specification for hydraulic system GB/T3766
(3). Main technical parameters
Model HZQ50/150
Span 50m
Rated lifting capacity 150t
Applicable gradient Longitudinal gradient ≤±3%
Lateral gradient ≤±4%
Skew bridge angle 0-45
The launcher longitudinal moving speed 4.6m/min
The launcher transverse moving speed 3.31m/min
Trolley longitudinal moving speed 4.6m/min
Trolley transverse moving speed 1.6m/min
Lifting speed 0.8m/min
Moving way walking type
Centre distance between two main girders 5m
Allowable wind force at working ≤6
Power about 90kw
Total weight about 180t
(4) Main structures and functions
HZQ50/150 walking type bridge girder launcher is mainly made up of main girder, front support leg, lifting trolley, middle support leg, rear bracket, rear support leg, electrical system and hydraulic system, all parts constitute a complete bearing structure system
1. Main girder
Main girder and launching nose assembly is made up of load-bearing main girder, front connection frame and rear connection frame, total weight about 90t
2. Front support leg
HZQ50-150 bridge girder launcher transportation
Front support leg is made up of bracket, inner sleeve, outer sleeve, connection beam, transverse moving gear box, transverse sliding rail, inclined strut, fixing device, rail clamping device, hydraulic cylinder and pins, total weight about 10t
Front support leg is important support of front part of the bridge girder launcher. Realize lifting and lowering the support leg by hydraulic cylinder and inner, outer sleeves; realize the complete machine moving transversely along the rail by transverse moving gearbox and transverse sliding rail; adjust angle to construct curved bridge and skew bridge easily by inner sleeve and connection beam; inclined strut make the right support leg and left support leg be connected as a whole.
3. Lifting trolley
Lifting trolley is made up of longitudinal moving gear box, transverse sliding girder and rail, transverse moving trolley, winch, movable and fixed pulley block and suspended beam, total weight about 13.5t
Lifting trolley is lifting mechanism, bottom longitudinal moving mechanism makes lifting trolley move forward along the rail on the main longitudinal girder; upper transverse moving mechanism makes lifting trolley move transversely along transverse sliding girder and rail; winch lifts and lowers the precast girder; above three parts and trolley steel structure is a whole part to finish lifting, moving, dropping, installing precast girders and other work, as well as to lift small articles to front abutment.
HZQ50-150-3-00 Lifting trolley
4. Middle support leg
Middle support leg is made up of hanging institution, roller institution, core plate, round girder, driving gearbox, driven gearbox, fixing device, transverse sliding rail and pins, total weight about 14.5t.
Middle support leg is important support of rear part of the bridge girder launcher. Realize the middle support leg moving forward by hanging institution; drive the main girder to move forward smoothly by roller institution; make the complete machine move transversely along the rail by transverse moving gearbox and transverse sliding rail; use core plate to adjust angle to construct skew bridge and curved bridge easily; round girder connects left support leg and right support leg
5. Rear bracket
Rear bracket is made up of hanging institution, roller institution, inner sleeve, outer sleeve, hydraulic cylinder and pins, total weight about 4t
Rear bracket is the support at rear part to make the main girder move forward as crossing piers. Move forwards along the bottom chord of the main girder by hanging institution; drive the main girder to move forward smoothly by roller institution; adjust the height of rear bracket by inner, outer sleeves and hydraulic cylinder to better adapt to cross piers as facing slope bridge.
HZQ50-150-0 General assembly sketch map
6. Rear support leg
Rear support is made up of connection seat, inner sleeve, outer sleeve and pins, total weight about 1.5t
Rear support leg is an auxiliary support to carry the middle support leg and rear bracket, realize jacking and lowering the main longitudinal girder by cooperating with inner, outer sleeves.
7. Accessories
Accessories are made up of main girder accessories, front support leg accessories, lifting trolley accessories, middle support leg accessories, rear bracket accessories and other accessories, total weight about 5t
Most accessories are some auxiliary platforms and facilities in order to facilitate the construction, be convenient for supplying power for support legs and lifting trolleys, be convenient for operating.
8. Electrical system
Electrical system is made up of distribution box, circuit, motor, over-travel limit switches, alarming system and lightning system, power about 90kw,
9. Hydraulic system
Hydraulic system is made up of hydraulic station, cylinder, oil-way and other parts, front auxiliary support leg, front support leg and rear support leg are equipped with a hydraulic system respectively, independent control to ensure normal work of support legs.
LD type electric single girder overhead crane
1）Purpose and structure
LD electric single girder overhead crane (the following says crane) is a kind of light lifting equipment, used with CD1、MD1 and other electric hoists, lifting capacity 1-20t, span 7.5-22.5m, working environment -25℃~+40℃, humidity ≤84％. It works under the environment without fire, explosion and corrosive matters and it is prohibited to lift liquid metal, and toxic, flammable and explosive objects. Work duty: intermediate work system（JC25%）
The product is a crane with general purpose, suitable for machinery fabrication, assembly, warehouse and other places. Features of its structures are as follows:
