Hydraulic operated interlock control system

Abstract

The invention discloses a hydraulic operated interlock control system. The system comprises a main control valve, a manned winch control handle, a cargo-loading winch control handle, a three-position eight-way reversing valve and two-position three-way limit valves, wherein the main control valve is used for controlling the manned winch control handle and the cargo-loading winch control handle; the manned winch control handle is used for controlling lifting movements of a manned winch; the cargo-loading winch control handle is used for controlling lifting movements of a cargo-loading winch; a set of control oil ways are in parallel connection with lifting main oil ways of the manned winch and the cargo-loading winch, two oil inlets of the three-position eight-way reversing valve are linked with the control oil ways of the manned winch and the cargo-loading winch respectively, the three-position eight-way reversing valve is provided with eight oil ports including four inlets and four outlets, four oil ports are used for controlling the manned winch, and the other four ports are used for controlling the cargo-loading winch; the two-position three-way limit valves are linked with two oil outlets of the three-position eight-way reversing valve. The hydraulic operated interlock control system is simple and reliable in structure and low in cost, the full hydraulic interlock control system is adopted to substitute for an original electric interlock system, and the hydraulic operated interlock control system effectively achieves interlocking of the manned winch and the cargo-loading winch and has good economic and social benefits.

Description

technical field [0001] The invention relates to a hydraulic operation interlocking system, which is especially suitable for occasions where two hydraulic operation actions are required to be completely interlocked and cannot be operated simultaneously in an explosion-proof environment. Background technique [0002] The HDC15T30M hydraulic slewing crane designed and manufactured by our factory mainly has two functions: it can carry goods and people. According to the DNV Classification Society regulations: When the crane is working, cargo and people cannot be carried at the same time, and there must be an interlock safety protection device on the control. The crane is equipped with two winches for carrying people and carrying goods. Two hydraulic operating handles are used to control the lifting respectively, and the two actions are completely independent. Our initial interlocking scheme is to install four explosion-proof electromagnetic reversing valves on four pipes of two ...

AI Technical Summary

Problems solved by technology

However, in the procurement inquiry stage, the explosion-proof solenoid valves are mostly imported from Europe and the United States, and the price is expensive, which has completely exceeded the cost budget of the product, and there is another problem with the use of electrical interlocks: when the crane is working, there are always two solenoid valves in the Long-term power-on state, it is easy to damage, and the maintenance cost is also high

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