Wave compensation cylinder with in-built check valve

Abstract

The invention discloses a wave compensation cylinder with an in-built check valve. The wave compensation cylinder comprises an end cover, a cylinder barrel and a cylinder bottom; the cylinder bottom is provided with a hydraulic oil cavity and a buffer sleeve; a rod-free cavity is formed in the cylinder barrel; two oil channels are formed outside the circumference of the buffer sleeve; each oil channel is divided into a narrow oil channel which is communicated with the hydraulic oil cavity and a wide oil channel communicated with the rod-free cavity; and the check valve which can assist in starting the cylinder is arranged in the wide oil channel. The check valve consists of a steel ball and a spring which are arranged at the bottom of the wide oil channel sequentially, and a nut which is in thread fit with the wide oil channel; one end of the spring is pressed against the nut, and the other end of the spring is pressed against the steel ball; the diameter of the steel ball is larger than the inner diameter of the narrow oil channel; and a through hole is formed in the middle of the nut. In the wave compensation cylinder with the in-built check valve, a way valve is adopted, the occupied space is small, and when placed in the cylinder, the way valve can be prevented from being exposed, and hardly rusts.

Description

technical field [0001] The invention relates to a wave compensating oil cylinder with a built-in check valve, especially one for 15000m 3 Heave compensating cylinders with built-in check valves for trailing suction dredgers. Background technique [0002] The wave compensation oil cylinder system can not only compensate the influence of wave height on the dredging efficiency, but also adjust the ground pressure of the rake head. For fine sand or loamy soil, lower the oil pressure to press the rake head into the mud surface. Adjusting the oil pressure will cause the heave compensation cylinder to generate a greater impact force when it falls back, so the heave compensation cylinder must be equipped with a buffer device, which can avoid the impact force on the bottom of the cylinder. However, after installing the buffer device, it is difficult to start the oil cylinder, and there will be vibration. In order to solve this problem, a check valve is generally added at the botto...

AI Technical Summary

Problems solved by technology

However, after installing the buffer device, it is difficult to start the cylinder, and there will be vibration

In order to solve this problem, a check valve is generally added at the bottom of the cylinder, but most of the existing check valves are external, occupying a relatively large space, and are easily corroded due to the heavy humidity at sea

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