Double-spring direct-acting overload valve

Abstract

The double-spring direct-acting overload valve comprises a valve body, the outer side wall of the valve body is sleeved with a flow gathering box in a sealed mode, a power generation and energy storage unit is installed on the bottom wall of the flow gathering box, the valve body comprises an upper valve column and a lower valve column which are the same in diameter, and an outer protruding block is arranged in the middle of the lower end of the upper valve column; an upper valve sliding groove extending into the upper valve column is formed in the bottom wall of the outer protruding block of the upper valve column, an outer overflow groove is formed in the top end of the lower valve column, and a lower valve sliding groove is formed in the groove bottom of the outer overflow groove. Double springs are matched with the valve element and the core column to achieve double-element two-stage pressure relief overload protection, the valve body and the valve element are separated, the pressure relief cross section area is increased, the pressure relief speed is higher, kinetic energy of pressure relief fluid is used for generating power for an alarm to give an alarm in the two-stage protection process, safety is higher, an external power source is not needed, and cost is reduced. Installation and use are more convenient.

Description

technical field [0001] The invention relates to the technical field of hydraulic relief valves, in particular to a double-spring direct-acting overload valve. Background technique [0002] Existing overload valves usually have a single-spring porous structure, that is, when the pressure exceeds a certain value, the pressure fluid pushes the valve core and compresses the spring, so that the valve core opens the pressure relief hole, and the pressure fluid can be discharged from the pressure relief hole. Due to the small flow cross-sectional area of ​​the pressure relief fluid in this kind of porous overload valve, the pressure relief speed is slow, and the set limit value of the pressure relief is kept constant by the pressure relief hole, so when the pressure growth exceeds the pressure relief speed of the pressure relief hole, Overload valves cannot provide effective protection. Contents of the invention [0003] The purpose of the present invention is to solve the probl...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the prior art that the pressure relief speed is slow due to the small pressure relief cross-sectional area and the maximum pressure relief speed is limited so that effective protection cannot be provided when the limit is exceeded, and the proposed double spring direct-acting overload valve

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