Novel hydraulic oil channel integrated valve for loader

Abstract

The invention discloses a novel hydraulic oil channel integrated valve for a loader, which comprises logic valves (2), a shuttle valve (9), throttle valves (10) and hydraulic check valves (3). The output ends of the logic valves (2) are respectively connected with a large cavity end A1 (8) of a rotating bucket cylinder and a large cavity end A2 (1) of a lifting cylinder. The input ends of the logic valves are both connected with the end of an oil pump by the throttle valves, the shuttle valve (9) is connected between the output ends of the two logic valves, and the input ends of the logic valves are respectively connected with a small cavity end B1 (5) of the rotating bucket cylinder and a small cavity end B2 (4) of the lifting cylinder through the hydraulic check valves. The bucket of a loader can finish spading and loading work by one oil pump through the integrated valve. The problem that two oil pumps need to be used in the multiway valves of an original loader to converting flow or a large-capacity pump is needed for finishing spading and loading work is solved. The number of oil pumps is reduced, load flow during the spading is reduced, and power consumed by an engine is accordingly reduced. The integrated valve can meet the requirement of the spading work of the loader for spading force and reduce power consumed by the engine. Meanwhile, as the bucket can make complicated motion, the filled degree of the bucket is improved, the loading time is shortened, and the production efficiency is accordingly improved.

Description

Technical field [0001] The invention relates to a hydraulic oil circuit of construction machinery, and in particular to a control valve in the hydraulic oil circuit of a loader. Background technique [0002] Loaders are construction machinery widely used in construction projects such as highways, railways, construction, hydropower, ports, and mines, and are one of the indispensable important equipment in engineering construction and other industries. The main purpose of the loader is to shovel bulk materials such as soil, sand, lime and coal. It can also do light shoveling operations on ore and hard soil, which can save a lot of manpower, greatly reduce labor intensity, and improve work efficiency. The working process of the loader mainly includes shoveling and lifting, in which the load is the largest when shoveling, and the engine power is consumed the most. In the existing loaders, the multi-way valve is an important hydraulic control element. At present, most of China's 5T-c...

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Problems solved by technology

[0003] Aiming at the above-mentioned problem in the prior art that the loader controlled by the multi-way valve consumes a large amount of engine power during shoveling, the present invention provides a method that not only enables the loader to meet the maximum load pressure during shoveling, but also reduces the engine power. , a hydraulic oil circuit integrated valve that reduces energy consumption

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