Integral type multichannel reversing valve

Abstract

The invention relates to an integral type multichannel reversing valve, which comprises a control handle, a valve body, an end cover and a front cover, wherein the handle is connected to the upper end of a control lever, and a pin shaft is connected to the lower end of the control lever by threads; a clamp nut is arranged on the upper part of the pin shaft, and the lower part of the pin shaft is connected with the end cover by a pin; a valve rod is arranged inside the valve body, and a choke plug hole is formed outside the valve body; both ends of the valve body are respectively in threaded connection with the end cover and the front cover; and a spring, a stroke gasket and a check ring are arranged in the end cover. The integral type multichannel reversing valve has the advantages that: an oil inlet valve body, a reversing valve body and an oil return valve body are integrated; due to the adoption of an integral casting process, the quality is small, the appearance is simple, and a complex runner does not influence the pressure loss of liquid due to the smooth transition of an inner cavity; the pressure loss of oil is better controlled, the time of passing through the valve body by the hydraulic oil is shortened, and the purity of the hydraulic oil is ensured; and castings are good in compactness and high in bearing pressure, and leakage among sheets of a sheet valve does not occur.

Description

technical field [0001] The invention relates to an integral multi-way reversing valve. Background technique [0002] At present, the multi-way reversing valves on the market are widely used in hydraulic systems such as construction machinery, mining metallurgical machinery, crane transportation machinery and light industrial machinery as direction control devices due to their strong versatility and high operating pressure. Multi-way reversing valves are divided into machined flow channels and casting flow channels in terms of flow channels, and divided into chip valves and integral valves in terms of integrity, and chip valves often suffer from large pressure losses during use. , The oil temperature rises rapidly, leakage occurs between the sheets due to poor sealing, and the leakage will inevitably cause problems such as oil pollution. Among domestic manufacturers, there is no integral casting flow channel reversing valve. The overall multi-way reversing valve is imported ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an integral multi-way reversing valve to overcome the large pressure loss, rapid oil temperature rise, and leakage between the plates during the use of the existing plate-type multi-way reversing valve. The problem of large amount and easy contamination of oil

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