Marine telescopic crane

[0009] Such as figure 1 , figure 2 As shown, the present invention includes a base 1 fixed on the deck. A tower 3 is installed on the base 1 through a slewing support 2. A basic arm 4 is hinged on the top side of the tower 3, and a hydraulic winch is installed on the upper end of the basic arm 4 5. A telescopic arm 6 is installed in the basic arm 4, a pulley device 7 is installed at the end of the telescopic arm 6, one end of the wire rope 8 is connected to the hydraulic winch 5, and the other end of the wire rope 8 passes through the pulley device 7 to connect the hook 9. The lower side of the tower body 3 is provided with a first fixing member 10, the bottom of the basic arm 4 is provided with a second fixing member 11, and a luffing cylinder 12 is installed between the first fixing member 10 and the second fixing member 11. The telescopic boom 6 can be used for lifting conditions with different working radii. After the operation is completed, the telescopic boom 6 is retracted into the basic boom 4, which not only optimizes the crane's shape and structure, but also occupies a smaller deck, enabling multiple engineering operations The pulley device 7 includes a pulley 13, a wire rope 8 is wound in the pulley groove 14 of the pulley 13, the baffle 15 is fixed between the brackets 16 on both sides of the pulley 13, and the inner surface of the baffle 15 is provided with ribs 17, which can improve the baffle 15 There is a fixed plate 18 between the pulley 13 and the brackets 16 on both sides. One end of the fixed plate 18 passes through the rib 17 and is fixed to the baffle 15, and the other end of the fixed plate 18 is connected to the tail of the pulley 13, then the pulley 13 is fixed A cavity is formed between the plate 18 and the rib 17 in which the wire rope 8 can swing. The thickness of the gap between the fixed plate 18 and the pulley 13 on both sides is smaller than the diameter thickness of the wire rope 8, which avoids the problem of the wire rope 8 running out of groove and falling out of groove. ; The rib 17 is coated with grease to prevent abrasion of the wire rope and play a better lubricating effect.