DUPLEX OIL CYLINDER, CROSSBEAM OPENING AND CLOSING DEVICE, CROSSBEAM OPENING AND CLOSING METHOD, AND CROSSBEAM OPENING AND CLOSING CONTROL SYSTEM

The present invention belongs to the field of mechanical apparatuses, and provides a duplex oil cylinder, a crossbeam opening and closing device, a crossbeam opening and closing method, and a crossbeam opening and closing control system. The duplex oil cylinder (100) comprises a first oil cylinder (10), a second oil cylinder (20), and a connecting pipe (30). The first oil cylinder is provided with a first rod cavity (14) and a first rodless cavity (15) which are isolated from each other; the first oil cylinder is provided with a first liquid inlet (16) and a first liquid outlet (17); the first liquid inlet is communicated with the first rod cavity; and the first liquid outlet is communicated with the first rodless cavity. The second oil cylinder is provided with a second rod cavity (21) and a second rodless cavity (22) which are isolated from each other; the second oil cylinder is provided with a second liquid inlet (23) and a second liquid outlet (24); the second liquid inlet is communicated with the second