Multi-way valve and excavator

A multi-way valve and oil circuit technology, applied in the field of hydraulic valves, can solve problems such as high cost, limited flow control accuracy, and complex structure, and achieve the effects of simplified structure, reasonable flow rate, and good speed regulation characteristics

Pending Publication Date: 2022-01-07
CHANGDE ZHONGLIAN ZHONGKE HYDRAULIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since most of the existing small excavators are post-valve compensation load-sensing multi-way valves, the flow control accuracy is limited; moreover, each working joint of the existing load-sensing multi-way valves needs to be separately installed with a compensation valve, so that its The structure is more complicated and the cost is higher

Method used

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  • Multi-way valve and excavator
  • Multi-way valve and excavator
  • Multi-way valve and excavator

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Embodiment Construction

[0051] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0052] In the description of the present invention, it should first be explained that terms such as "installation", "installation" and "connection" should be understood in a broad sense unless otherwise clearly specified and limited, for example, it can be a fixed connection or a A detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediary, or an internal communication between two elements or an interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

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Abstract

The invention relates to a hydraulic valve, and discloses a multi-way valve and an excavator. The multi-way valve comprises a first link (1), a plurality of working links arranged in sequence, a pilot oil way (100), an oil inlet way (101) for communicating the first link (1) with the working links, and an oil return way (102) for communicating the first link (1) with the working links, wherein each working link comprises a main valve core; the control end of each main valve core is provided with a proportional control valve connected with the pilot oil way (100); and priority oil channels are arranged in the main valve cores of part of the working links so that the flow distributed by the working links and the working links arranged in front of the working links can be increased. The multi-way valve has high flow distribution precision, a compensation valve does not need to be arranged, and the structure is simple.

Description

technical field [0001] The invention relates to a hydraulic valve, in particular to a multi-way valve. Furthermore, it also relates to an excavator. Background technique [0002] Small excavators are a typical multi-actuator system, which is characterized by multiple actuators acting in parallel and frequent load changes. Compared with large excavators, its application scenarios are more variable, which requires its hydraulic system must have better The flow distribution characteristics are used to improve the maneuverability of the main engine. Therefore, load-sensitive multi-way valves are currently used in most small excavator hydraulic systems. [0003] The load-sensing multi-way valve is mainly composed of head and tail joints and various working joints. The oil circuits of each working joint are connected in parallel to independently realize the actions of various actuators of the excavator, such as boom, bulldozer, stick, bucket, and rotary , walk left, walk right, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F3/36E02F3/38E02F3/42E02F3/28
CPCE02F3/36E02F3/38E02F3/425E02F3/28
Inventor 周启迪蒋淋罗炎热
Owner CHANGDE ZHONGLIAN ZHONGKE HYDRAULIC
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