Combination valve with speed governing, reversing and overflow functions

Abstract

The invention discloses a combination valve with the speed governing, reversing and overflow functions, and relates to the technical field of combination valves. The combination valve with the speed governing, reversing and overflow functions comprises a pressure reducing valve, a throttle valve, a safety valve, a manual reversing valve and a main valve body, wherein hydraulic oil enters the pressure reducing valve through an oil inlet in the main valve body, a speed governing valve with the throttle governing function is formed by the pressure reducing valve and the throttle valve, the oil outlet of the throttle valve is connected with the oil inlet of the manual reversing valve, and the manual reversing valve is connected with an outside executive component. When the pressure of the executive component is overhigh, the safety valve is opened to unload, and the direction of oil inlet and outlet of the executive component can be changed by changing the oil feed position of the manual reversing valve; because the structure of the main valve body is designed, and the pressure reducing valve, the throttle valve and the safety valve are each of a valve element and valve sleeve type structure, manufacturing and installation are convenient; and the special structural design that a sliding rod, a throttle valve end cover and an adjusting handle are arranged from inside to outside is adopted, oil is prevented from leaking, and therefore, the combination valve with the speed governing, reversing and overflow functions has the advantages of being capable of preventing leakage, simple in oil-way structure, compact in structure, safe, reliable, convenient to manufacture and the like.

Description

technical field [0001] The invention relates to the technical field of combined valves, in particular to a combined valve with functions of speed regulation, direction change and relief. Background technique [0002] As the control element in the hydraulic system, the hydraulic valve has the function of controlling the flow direction, pressure and flow, and is widely used in various engineering fields such as machine tool industry, metallurgical industry, and construction machinery. [0003] A certain hydraulic system needs to realize the functions of speed regulation, reversing, and overflow, and the hydraulic oil pipe can be connected in a certain way to the pressure reducing valve, throttle valve, safety valve, and reversing valve to realize the above functions. However, for small mechanical systems, the space left for the hydraulic system is very small, and the scheme of connecting the pressure reducing valve, throttle valve, safety valve, and reversing valve with oil pi...

AI Technical Summary

Problems solved by technology

However, for small mechanical systems, the space left for the hydraulic system is very small, and the scheme of connecting the pressure reducing valve, throttle valve, safety valve, and reversing valve with oil pipes in a certain way takes up a lot of space, which is not suitable for some small mechanical systems Not applicable

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