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The bridge election crane is making the prefabricated beam placed on the prefabricated piers. The bridge erection crane machine belongs to the crane category, because its main function is to lift the beam, and then transported to the position and then put down.In the road, rail orbit, for the whole span of erection of small cross-beam bridge construction. Because of its high efficiency of the bridge erection, in the Chinese railway bridge standard design, and more to consider it as a design principle. Its body is large, beyond the rail transport boundaries, to be disintegrated transport, arrived at the site, and then assembled to use.
China has three kinds of standing bridge erection machine, used for the erection of reinforced or prestressed concrete beams:
I.Single girder erecting machine
One of the bridge construction machinery, the boom is a box beam, forward extension, in front of it has a folding column (composed of the left and right feet). The machine can be carried in the no-load state into the bridge, and then the front column straight, supported in the front pier. When the frame (or the whole beam) moves along the boom, the boom is close to the simply supported beam. Bridge, the aircraft can be carried in the no-load state of the bridge, you must first use the special beam gantry crane from the railway flatbed car to the special transport beam vehicles, and then the beam machine and the bridge machine End of the bit, with the bridge in the bridge crane on the two hanging beam car will be lifted beam, along the arm before the line, arrived at the bridge beam. In order to adapt to the curve of the bridge, the machine's arm can be a small amount of swing in the horizontal plane. The beam-in-position method is the same as the double cantilever bridge machine (moving beam or dialing). The advantages of the machine is: to cancel the balance weight, no longer need to push the locomotive, the beam does not need to bridge the fork, the degree of mechanization, safety performance has improved. Lifting the 130 tons of victory-type bridge machine that is the case.link:http://www.chinacranemanufacturer.com/gantry-crane/double-girder-gantry-crane/jqjh-60t-80t-100t-150t-bridge-election-crane.html