Integral multi-way reversing valve

Abstract

The invention relates to an integral multi-way reversing valve. The valve comprises an operating handle, a valve body, an end cover and a front cover, wherein the upper end of an operating rod is connected with the handle, and the lower end of the operating rod is in threaded connection with a pin shaft; the upper part of the pin shaft is provided with a fastening nut, and the lower part of the pin shaft is connected with the end cover through a pin; a valve rod is arranged in the valve body; a plug hole is formed outside the valve body; the two ends of the valve body are in threaded connection with the end cover and the front cover respectively; and a spring, a stroke gasket and a check ring are arranged in the end cover. The valve has the advantages that: an oil inlet valve body, a reversing valve body and an oil return valve body are integrated, and an integral casting process is adopted, so that the valve has light weight and simple appearance, a complicated flow channel does not influence the pressure loss of liquid due to the smooth transition of an inner cavity, the loss of oil liquid pressure is better controlled, time for hydraulic oil to flow through the valve body is shortened, the purity of the hydraulic oil is ensured, a casting has high compactness and bearing pressure, and the problem of leakage among plates of a plate valve is solved.

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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