260T Truss Type Concrete Highway Bridge Girder Launching Erection Gantry Crane

Product Description

260T Truss Type Concrete Highway Bridge Girder Launching Erection Gantry Crane description. The author applies to highway, railway bridges to the construction site of bridge construction, its main function is to mention prefabricated good beam slice and delivered on prefabricated good piers.it and general meaning cranes have very big different, high safety requirements.

Girder inspection

The main beam is the main source of force for the bridge crane. The main beam of the bridge crane is usually welded from steel plates. The main beam is the main bearing component of the bridge crane. In addition to the steel material requirements that meet the design requirements of the bridging machine, the welding quality of the steel plate butt welds must meet the design standards. This requires non-destructive testing of the main beam of the electric single-girder bridge crane to meet the requirements. Today we will discuss the inspection rules for bridge girder.
Before welding rail bridge joints, carefully clean the grooves and nearby oil and rust until a metallic luster is revealed. Welding consumables are matched to basic electrodes according to the same strength standards.
The welding process of the butt welding of the main beam is complicated and prone to defects such as incomplete penetration, inclusions, pores, hot cracks and cold cracks. In particular, thermal stresses from butt welds can endanger the connection to the weld. Microscopic defects at the base metal edges, such as diffused inclusions, uneven intergranular structures, etc. These micro-defects will expand under the effect of welding heat, resulting in strong thermal stress at the joint between the weld and the base metal. When the stress reaches a stress that the material itself cannot withstand, macro cracks or delayed cracks will appear on the steel plate and the weld. Therefore, non-destructive testing of bridge girder is one of the important links to ensure the quality and security of the girder.
After the non-destructive testing of the welding quality of the butt weld of the steel plate of the electric bridge machine, the problems caused by welding can be completely avoided, and the operator can operate it very carefully.

Bridge Girder Launching Erection Gantry Crane Brake

Due to its heavy weight, Bridge Girder Launching Erection Gantry Crane can only know that it has a large inertia once it is running. According to the safety operation specifications of bridge cranes, sudden braking is prohibited during operation. From a security point of view, it is very scientific, because if the brakes are applied immediately, the entire bridge machine will generate large torque due to strong inertia, which is very fatal to the transmission system. In severe cases, twisting the drive shaft can even cause the entire machine to deform.
Sudden reverse braking may also cause a violent impact on the gear coupling system, an accident, and adversely affect the motor. Therefore, the use of double-girder cranes is required to be professional operators. Every time they are used, they should be carefully checked and security placed in an early position. If you find that some places do not meet security requirements, you must not force yourself to work. The manufacturer performs maintenance to ensure safe use.
The welding process of the butt welding of the main beam is complicated and prone to defects such as incomplete penetration, inclusions, pores, hot cracks and cold cracks. In particular, thermal stresses from butt welds can endanger the connection to the weld. Microscopic defects at the base metal edges, such as diffused inclusions, uneven intergranular structures, etc. These micro-defects will expand under the effect of welding heat, resulting in strong thermal stress at the joint between the weld and the base metal. When the stress reaches a stress that the material itself cannot withstand, macro cracks or delayed cracks will appear on the steel plate and the weld. Therefore, the nondestructive inspection of the crane main beam is one of the important links to ensure the quality and security of the main beam.
Double girder bridge crane can only be used for transporting heavy goods, no people carried or flammable and explosive dangerous goods.

On-site Installation

Dowell Crane Co., Ltd is a China-leading company in crane manufacture and crane trading business. We serve a broad range of customers from all over the world, providing a complete set of advanced lifting projects, including Gantry crane, Bridge crane, Portal crane,
Beam launcher, Electric winch, Lifting platform and so on. Dowell crane is sticking to the global optimal procurement of raw materials and parts to make innovations in technical details of electric control and mechanical transmission,etc.We continue the wide and deep cooperation with the well-known transnational enterprises such as Simens and Sew in Germany, Schneider in France and ABB in Switzerland, etc.

Company Strength

Dowell Crane Co., Ltd is a China-leading group of crane businesses which was founded in 1955, Only one company has 60years manufacture experience. And serving a broad range of customers all over the world to provide a complete set of advanced lifting project, including Gantry crane, Bridge crane, Jib crane, Accessory. Our clients include manufacturing and process industries, shipyards, ports and so on. Regardless of your lifting needs, dowellcrane Machinery Group is committed to providing you with lifting equipment and services that increase the effectiveness and value of your business.

a). Dowell Crane Co., Ltd have already obtained the CCC,CE,BV,SGS,ISO OHSAS certification's and have won over 60 honors.

b). China's leading mechanical research and design institute and famous university provides advanced technical support for us.

c). Serviced for more than 5000 companies, and the products popular in more than 40 countries.

d). Through decades of unremitting efforts, now, Dowell Crane Co., Ltd covers an area of 180,000 square meters and over 380 sets of advanced equipments. Management staff reach to 860, and our worker have more than 10000.

Packing & Delivery terms:

1. Hoist and electric parts will be packed by plywood crate, for avoiding the demage from goods crash and impact during the delivery.

2. Girders and other main parts will be packed by plastic woven cloth, for preventing rust from soppy condition during the transportation.

3. Only the best transport solution will be taken for saving your cost uttermost on finance, security and time.