Detection and quality standard of bridge erecting machine
The bridge erecting machine is a device for placing a prefabricated beam on a prefabricated pier. Bridge crane is a crane, because its main function is to lift the beam, and then transported to the location and put down. But it is very different from the general sense of the crane. The requirements of the harsh conditions, and the existence of the beam on the line, or called the longitudinal shift. Bridge machine is divided into the erection of highway bridges, conventional railway bridge, passenger dedicated railway bridge, etc..
Single girder bridge erecting machineThe utility model is characterized in that the hanging arm of the bridge is a box girder, and the front suspension is extended. The machine can be unloaded in the state of their own into the bridge, and then the front column straight, supported in front of the pier. When the beam (or the whole beam) moves along the boom, the boom is close to the beam. Bridge, the machine can automatically enter the bridge in the unloaded state, must first be the beam gantry crane with special transfer from the railway flat car special beam car, then the car rear end beam and the bridging machine for erecting machine in position, driving the jib crane will be two the beam lift along the arm forward, arrive at the bridge site off the beam. In order to adapt to the curved bridge, the boom of the machine can swing a little in the horizontal plane. The method of beam in place is the same as that of the double cantilever bridge erecting machine (beam or track). The machine has the advantages of: cancel the balance weight, no need to push the top of the locomotive, feeding beam does not need the bridge line, the degree of mechanization, safety performance has improved. The 130 - ton victory type bridging machine.
Double cantilever girder erecting machineBridge construction machinery, the use of the Soviet Union earlier. In 1948 the introduction of the front and rear arm with steel beam, lifting weight of 45 tons and 80 tons of two kinds. In 50s, the two arms to the framework, lifting to 130 tons.
This type of bridge machine can not be self, need to push the locomotive. The forearm is used for hanging beam, and the rear arm is balanced, and the front and rear arms can not swing in the horizontal plane. When the bridge is built, it is often necessary to use a special 80 ton Xiaoping car to transport the beam to the hanging arm of the bridging machine, which is called "feed beam". Bridge crane will lift the beam, the axle load increases, and the bridge of the new embankment is relatively soft, therefore, the bridge crane crane beam must take reinforcement measures, such as the use of heavy car road, add sleeper, etc..