Stationary jib cranes for bridge construction

With the needs of economic construction, the construction of roads and bridges has entered a new period of rapid development, followed by the vigorous development of new technologies and new equipment, among which the more typical ones are the fixed-type bridges specially developed for segment-assembled bridges. The cantilever crane, with its superior performance, has become an indispensable key equipment in the construction of highways and bridges.

Since the beam body of the segment-assembled bridge is composed of multiple segments, it is very important whether the installation position and posture of each segment are accurate during the erection process. The trolley on the crane and the vertical trolley at the bottom of the gantry can only realize the adjustment of the segment position, but the adjustment of the attitude cannot be realized. Therefore, it is necessary to develop a spreader to realize this function.

The fixed cantilever crane mainly solves the technical problems existing in the above-mentioned prior art, and provides a fixed cantilever crane. By changing the structure of the spreader into two parts hinged together, a hydraulic cylinder is installed between the two parts. , so that the spreader can adjust the attitude of the beam section in the air, which solves the problem that the ordinary spreader cannot complete the attitude adjustment of the beam section, thus ensuring the installation accuracy of the beam section, and greatly reducing the time used for the beam section adjustment. Improved work efficiency.

The above-mentioned technical problems of the fixed cantilever crane are mainly solved by the following technical solutions: a fixed cantilever crane includes a spreader, a hoisting trolley and a longitudinal beam, and the spreader is composed of a boom and a suspender arranged on the boom. It is composed of V-shaped movable parts, the V-shaped movable parts are connected to the upper hydraulic cylinder, the upper hydraulic cylinder is connected to the upper beam, and the upper beam is adjusted by the expansion and contraction of the upper hydraulic cylinder to adjust the angle in the left and right directions; the upper beam and the frame Structural connection, the upper beam is provided with a lower beam in the middle of the frame structure just above the frame structure, the lower beam is connected with the lower hydraulic cylinder, and the frame structure adjusts the angle in the front and rear directions through the expansion and contraction of the lower hydraulic cylinder, Such a technical solution solves the problem that the ordinary spreader cannot complete the attitude adjustment of the beam section, thereby ensuring the installation accuracy of the beam section, greatly reducing the time used for the beam section adjustment, and improving the work efficiency.

Features of stationary jib crane

The spreader can walk on the longitudinal beam, so that both ends can be lifted.

The spreader of the fixed cantilever crane can be disengaged from the lifting device of the cantilever crane, so that the bridge components can be anchored in the designated position for a long time to meet the requirements of the construction process.

The hydraulic cylinder on the spreader is connected with the V-shaped movable part at an angle of 45 degrees, and the other end is connected with the upper beam

The lower hydraulic cylinder of the spreader is connected with the lower beam at an angle of 45 degrees, and the other end is connected with the upper beam.

The beneficial effect of the fixed cantilever crane: by changing the structure of the spreader into two parts hinged together, and installing a hydraulic cylinder between the two parts, the spreader can adjust the attitude of the beam section in the air It solves the problem that the ordinary spreader cannot complete the attitude adjustment of the beam section, thus ensuring the installation accuracy of the beam section, greatly reducing the time used for the beam section adjustment, and improving the work efficiency. Therefore, the utility model has the characteristics of simple structure and reasonable design.

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