The Operating Precautions of the Bridge-erecting Crane（Ⅲ）

According to the different working conditions of the front, middle and the back triggers as well as the jack, the setting value of the overflow valve is determined usually as 16MPa with the max value not more than 20MPa.

If the temperature of the oil is over 70℃, the machine should be stopped to be cooled; Similarly, if the temperature is less than 0℃, the hydraulic oil of low-temperature should be used.

If any failure of each component or circuit line occurs, the machine should be stopped instantly. And only the professional technician can inspect and maintain the machine, and the operator is not allowed to disassemble the machine.

The stop iron should be placed on the longitudinal or traverse rail of the bridge-erecting crane to ensure the safety of the displacement of the bridge-erecting crane.

Before the bridge-erecting crane begins to work, the height of the front and back trigger should be adjusted to make the longitudinal slope of the main girder of the whole machine not more than 1.5%.

The slop of the machine longitudinal traveling rail is less than 3%; If not, some adjustments should be made to meet the requirements.
If the machine is down the slope, when the longitudinal rail is more than 3%, the machine must be protected by the hoist to avoid the slip of the it.

When the machine travels longitudinal and the girder transport is running, the two sides of them should be supervised by staff in case that if the speed is lost control, the power should be cut off immediately and the stop iron should be used to stop the machine forcedly.

The Operating Precautions of the Bridge-erecting Crane(Ⅱ)

Since the bridge-erecting crane belongs to the large special equipment of bridge girder erection. The division of labor of the bridge-erecting crane must be clear and under common direction. And the professional operator, electrician and safety inspector. The strict constructing organization and measures must be ready to ensure the safety of construction. The staffs are as follows:

One commander: it must be familiar with the basic requirements of the bridge structure and the lifting work. It should be familiar with the commanding signal,bridge structure, assembly procedures, operating method as well as the requirements of the operating Instruction, with organizational capacity and casino strong sense of responsibility.

One electrician: it understand the circuit diagram of the bridge-erecting crane and can connect the lines according the circuit diagram. Also, it can deal with problems quickly and be skilled and quick to response with strong sense of responsibility.

One hydraulic fitter:it should be familiar with the basic knowledge and the skill of operating and maintenance. Additionally, it can remedy the trouble and operate correctly.

Three lifting worker: it should online casino be equipped with a few years’ working experiences as a lifting worker and familiar with the operating and safety regulars with strong sense of responsibility and certain knowledge of mechanics.

Three backmen: it should be equipped with certain knowledge and a healthy body, hardworking and patient.

When the cantilever move longitudinally, the two trolleys must withdraw with the front and back trolley returning to the back trigger.

When the middle trigger supports the girder to the height, the back trolley must return to the back trigger.

When the front and back trigger supports the girder to the height, the two trolleys must be near the middle trigger.

The Operating Precautions of the Bridge-erecting Crane(Ⅰ)

        Before the bridge-erecting crane walks longitudinally, the weld of the insulating steel of cross beam should be finished and the concrete should be placed in the insulating steel of cross beam. With all of those things meeting the design requirements, the bridge-erecting crane is allowed to walk longitudinally.

Before each girder is in place, the temporary support should be in both ends to make the large girder keep vertical and stable to avoid overturn and displacement. After the second girder is ready, the reinforcing steel of the two ends of the insulating steel of cross beam should be immediately welded except the temporary support to strengthen the stability.

The height of the top surface of the walking longitudinal rail of the bridge-erecting crane should be the same to keep stable. The transvrsal walking rails of the front, middle and casino online back triggers should be paralleled and the certain distances among them should be kept.

Only with everything ready, the bridge-erecting crane is allowed to walk longitudinally, which is asked to be finished in one time without stop in the middle way.

When there are the upper and lower longitudinal slopes, the preventing slipping measures should be taken when the bridge-erecting crane displaces longitudinally.

The bridge-erecting crane must lift objects to go on a run test after its’ assembly is finished. Alternatively, it can go on a run test with the concrete girder, after which the bridge-erecting crane can be in place and begin the assembly.

When the bridge-erecting crane is being assembled, the overall comprehensive safety inspection must be made with one hole finished. If any problem is found, the bridge-erecting crane must stop operating and can continue its operation with the problem addressed. It is not allowed to operate with the abnormal machine and electrical.

The bridge-erecting crane is not allowed to operate with overload and lift objects aslant.

The bridge-erecting crane is not allowed to operate with the wind level more than 6; its lifting trolley and itself must be fixed firmly with rigging; when it stops operating, the power should be cut off to prevent accidents from happening.

When the bridge-erecting crane finds its longitudinal place, the size of which must be strictly controlled to ensure that the concrete precast beam can be placed safely.

The Explanation of The Walking Type Bridge Girder Launcher

Based on the actual construction requirement,the experience of our company and the advantages of other companies, the walking type bridge girder launcher is one kind of carefully designed and developed launching gantry, catering to the needs of the market.

The walking type bridge girder launcher consists of the main guiding girder, the front guiding girder, the auxiliary ejector rod(the front and middle one), the front, middle and back trigger, the horizontal guiding girder, the longitudinal trolley, the lifting trolley, the sliding rail, hydraulic systems, electrical control etc. They will be introduced one by one in the following:
The main guiding girder: it employs the castellated beam structure, bearing the whole weight of prefabricated beam; the lifting weight walks on the main guiding beam and under it are the sliding rails of the front and middle trigger.
The front guiding girder: it also uses the castellated beam structure with the effect of guiding the bridge girder launcher when it passes through the holes.

The longitudinal trolley: connected with the front and middle trigger, it can make the guiding girder walk longitudinally with the guiding girder in it.
The lifting trolley: the front and back lifting trolleys are equipped with the low-speed hoist, walking on the horizontal guiding girder to make the guiding girder walk horizontally.

The auxiliary push rod(the front and middle one): used as the operation of going through the hole, helping the front trigger and the middle trigger walk longitudinally and adjusting the main girder, bearing part of the weight.

The Flying Planes Display The Beauty of Air Show in Shangjie

Shangjie Airport of Zhengzhou ushered the general air show hosted by Reignwood aviation group on Sept. 12, 2014. As the domestic general aviation base, Shangjie Airport witnessed a grand meeting.

The green water in the beautiful Dongguo Lake near the Shangjie Airport attracted people’s attention. And the people came and went the way of pedestrians, an endless stream.

The small planes coming from various big airline companies stood in the Shangjie Airport.

The pilots from each country did the toughest stunts during the meeting and witnessed by the audience all over the worldwide. Each of them tried its best to perfect the performance,making the plane do all kinds of difficult moves like 180 degree rotation flying, which thrilled the audience. In addition, the two planes cooperated with each other, leaving lots of beautiful arc in the air.

Three large inflatable balloons rose in the one side of the meeting place, written with “One World, One Dream”, which became the nice expectation of take-off of citizens in Shangjie.

The meeting ushered the featured aircraft in order from British,

The general air show displayed the powerful economy of China, gave Shangjie District the development opportunity, opened our horizon and paved the way for industrial development of Shangjie District.

1. Application range of Girder Transporter

HZY900 girder transporter is suitable for transporting and installing whole concrete girder in high speed railway construction. Girder transporter can carry concrete box girder from precast yard to the worksite by way of pavement, railway roadbed, bridge and culvert, cooperating with the bridge girder launcher to finish installing girders. The girder transporter can carry the bridge girder launcher to another worksite in short distance, and also carry it to pass the passenger special double line tunnel.

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2. Main features and advantages of Girder Transporter

The girder transporter is designed and manufactured by ZZHZ, its main features and advantages:
● Hydraulic drive, hydraulic suspension bridge, hydraulic independent steering , the rise, fall and leveling of hydraulic frame. Use industrial computer to control driving, rise, fall, turning and leveling, as well as realize various operation modes such as direct movement, oblique movement and turning. The complete vehicle is very flexible, can realize no gliding driving or less gliding driving in smaller space.
● Use high quality interchangeable parts and standard parts as designing the transporter, choose famous brands parts at home and abroad as main accessories to improve reliability. Combination property and engineering level of the complete machine achieve international advanced level.
● When the transporter feeds girders cooperating with the bridge girder launcher, fixed three points support is turned to indeterminate many-points, which greatly improve the reliability of support and reduce bending moment of main girder of transporter frame.
● As for safety: the transporter is equipped with monitoring alarm, emergency braking device, limitation inhibiting device, overload protection device, work environment wind force measurement device and so on.
● Set up double driving rooms with same configuration at two ends of the transporter, can realize two-way walk. In the driving room, you can watch rich display information to fully understand and control the condition.

3. Main technical parameters of Girder Transporter

The walking type bridge girder launcher does not need pave the longitudinal rails. It not only can reduce the stress of bridge, but also can save the cost of construction. And it has a wide adaptability for the box girder.

The main girder and main connecting structures adopt the mature pin connecting mechanism, it is very firm and reliable, and the assembly and disassembly are rapid and convenient.

In order to make the bridge girder launcher can adapt the longitudinal slope and transverse slope, the machine adopts legs which can move forward by it. And the force which the bridge bears should be reasonable and safe;
Front and middle legs can be adjusted randomly and core plate with adjustable angle which can adapt the erection of curved bridge and Slope Bridge. According to angle of Slope Bridge, the user can adjust the front and middle legs when Slope Bridge is erected. Therefore, it can be used for 45°and less than 45° any angle slope bridge.

Transverse trolley is added to the lifting trolley, the whole machine traverses with boundary beam which resolve the problem of installation of boundary beam.

Main technical parameters of Walking type bridge girder launcher：

Product Model

HZQ30/120 HZQ40/160 HZQ50/200
Span（m） 30 40 50
Rated Lifting Capacity（T） 120 160 200
Crane Longitudinal Moving Speed
（m/min） 4.6 4.6 4.0
Crane Transverse Moving Speed
（m/min） 4.6 3.31 2.87
Trolley Longitudinal Moving Speed
（m/min） 4.6 4.6 1
Trolley Transverse Moving Speed
（m/min） 1.7 1.4 1.8
Rated Power（KW） 85 95 140
Self Weight（T） 115 165 225

Walking Type Bridge Girder Launcher (Ⅰ)

1. Instruction

Based on the actual construction requirement,the experience of our company and the advantages of other companies, the walking type bridge girder launcher is one kind of carefully designed and developed launching gantry,catering to the needs of the market.

2、Characteristics
First, the special honeycomb girder firstly developed by our company is the patent product, featuring light weight, big lifting capacity and strong ability to resist the wind etc.

Second, with creative form and reasonable structure, the design of the walking type bridge girder launcher takes the features of the modern bridge construction into consideration, adopting the design of CAXA, which makes the walking type bridge girder launcher more applicable.

Third, the walking type bridge girder launcher employs the ANSYS to optimize the whole structure, giving rise to a light weight and high strength.

Fourth, the walking type bridge girder launcher moves from one pier to another pier by itself balance with front guiding girder, and does not need to add counterweight to meet the longitudinal stability, which is reliable and safe.

In accordance with the features of the prestressed concrete beam of the peach blossom valley of the Yellow River Bridge, HZP series segment assembled bridge girder launcher is the special equipment of box-girder structure for segment erection produced by our company and China Railway Bridge Bureau Group. The structure of the HZP series segment assembled bridge girder launcher is simple and convenient to use, which can greatly improve the efficiency of the construction.
Features:
First, the main girder of the HZP series segment assembled bridge girder launcher employs the box-girder structure, featuring high strength and small deflection.
Second, the design is reasonable and the main structure adopts the theory of symmetric design.
Third, the bridge girder launcher can conduct the construction bidirectionally, which can feed the girder under bridge and at the rear part of the bridge.
Fourth, the structure of the bridge girder launcher is simple and convenient to use.
The launching gantry produced by our company is developed based on the customer’s requirement. An example of specific model is as follows:

Main Technical Parameters
Item/Data/Type HZP1600
Span 50m、51m
Lifting height of the trolley 56m
Rated lifting capacity 140t
Max hanging weight 1600t
Max working slope 20‰
Max working transverse slope 20‰
Min curved radius 5500m
Traveling speed 0—1m/min
Speed of erection of girder 10(day/span)
Total power 180KW

Rated lifting capacity: 550t
Fitted shapes of girder: 32m, 24m and 20m single line or double lines, and girder box with changing spans
The lifting speed of the trolley: 0-0.5m/min
Lifting height: 6.6m
Horizontal fine-turning speed: 0-0.1m/min; horizontal fine-turning speed: ±200mm
Moving speed of the trolley: 0-3m/min(with heavy load) and 0-5m/min(without load)
Lifting and packing method: lifting objects with four points and three of them balancing the machine
Min radius of curved bridge: Rmin≥2000m
Operating method: operating in the operating room in the way of remote operation
20‰ for longitudinal slope and 4‰ for transverse slope
Temperature applicable for the operation: -20℃~50℃
Applicable wind level: level 6 for the operating state and level 11 for the non-operating state
The technical parameters of the auxiliary trolley, the moving method of the nose girder and the lifting capacity of the auxiliary trolley: 50t; moving speed of the auxiliary trolley: 0-3m/min; moving method of the nose girder: the front trolley lifting girder, auxiliary leg and trolley help one another to operate
Operating efficiency:
Out dimension: the main machine with the length of 75.2m, the width of 11.56m and the height of 11.61m; nose girder with the length of 36.25m, the width of 1.212m and the height of 2.4m; the whole machine with the length of 88.8m, the width of 11.56m and the height of 11.265m
Power: 220KW; Max power of the single operation: 140kw
Rated power of the electric generator: 220kw
Total weight: 380t