Hydraulic multi-channel valve for agricultural machine

Abstract

The invention discloses a hydraulic multi-channel valve for an agricultural machine. The hydraulic multi-channel valve comprises a valve body, a valve stem, a rear bonnet and a support. A valve cavity is arranged in the valve body, the valve stem is inserted into the valve cavity, the right end of the valve stem extends out of the valve body, and the support sleeves the valve stem and is positioned on the right end surface of the valve body; the rear bonnet is positioned at the left end of the valve body; a working oil port A and a hydraulic lock cavity are arranged on the valve body; the hydraulic lock cavity is connected with the valve cavity by a second oil duct. A hydraulic lock is arranged on the hydraulic lock cavity; the hydraulic lock comprises a check valve element, a check valve sleeve, a spring, a screw plug and a steel ball; an arc-shaped groove which is bent towards the axis of the valve stem is formed in the valve stem. The hydraulic multi-channel valve for the agricultural machine has the advantages that oil leakage risks can be reduced, the work reliability of the valve can be improved, forward locking and floating can be effectively combined with each other, oil leakage and dust can be prevented, and the like.

Description

technical field [0001] The invention relates to a multi-way valve, in particular to a hydraulic multi-way valve for agricultural machinery. Background technique [0002] Harvesting is a highly seasonal, labor-intensive and labor-intensive link in the agricultural production process. In production practice, harvesting is often closely linked with the sowing of the next crop. Farmers often use "rushing to harvest and rush to plant" as a metaphor for the urgency of work, and associate it with a bumper harvest. With the development of the national economy, especially the rural economy and agricultural productivity, farmers are increasingly calling for the mechanization of rice and wheat harvesting, and the role and significance of harvesting mechanization are being recognized by more and more people. In the harvesting machinery industry, hydraulic technology has been more and more widely used, and the application proportion of hydraulic transmission devices is increasing. Hydr...

AI Technical Summary

Problems solved by technology

[0004] At present, the existing multi-way valves for agricultural machinery, such as Figure 5 As shown, there is no hydraulic lock on the A port, and there is no arc groove on the valve stem, so there will be problems such as reversing sticking and premature wear of the valve hole during use.

In addition, the end of the valve stem is sealed with an O-ring, which is difficult to process and prone to oil leakage.

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