Underwater hydraulic impacting shovel
A hydraulic impact and hydraulic cylinder technology, which is applied in the field of impact shovels, can solve the problems of increased friction of the sealing structure, a large impact on impact efficiency, and the sealing cannot meet the requirements, etc., to achieve the effect of increasing impact force, improving efficiency, and convenient replacement
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[0029] The invention discloses an underwater hydraulic impact shovel, such as figure 1 Shown is a schematic diagram of its working principle. In the figure, the hydraulic cylinder 1 is divided into a variable pressure chamber 11 and a normal high pressure chamber 12 by the piston 21 of the piston rod 2. In addition, a high pressure nitrogen chamber 13 is arranged at the rear of the hydraulic cylinder, and the piston rod 2 is divided into a front rod 22 and a rear bar 23. In the figure, the oil distributing valve 3 includes four ports A, B, C, and D, and a cone spool 31 and a spool 32 of the oil distributing valve are also arranged inside it. In addition, a through hole is also arranged in the spool 32. 33.
[0030] Such as figure 1 In the state shown, the high-pressure oil from the oil pump enters the oil distribution valve 3 through the D port, and then enters the left chamber 34 of the valve core through the through hole 33 of the valve core. The spring 35 pushes the spo...
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