a relief valve

Abstract

The invention relates to a decompression valve comprising a valve body. An oil inlet channel, a decompression channel and valve seats arranged between the oil inlet channel and the decompression channel are arranged on the valve body. A conical valve element is movably assembled in the valve body and corresponds to the valve seat. The valve body is further provided with a drive mechanism, wherein the drive mechanism is used for driving the conical valve element to move so as to enable the conical valve element to cooperate with the valve seat in the moving process to form different valve port opening degrees. The oil inlet channel is provided with an unblocking-blocking valve element used for controlling the oil inlet channel to be unblocked or blocked. When movement of the conical valve element needs to be utilized so as to adjust the decompression grade, the unblocking-blocking valve element is used for blocking the oil inlet channel firstly, a short-time or instant static environment can be formed, the impact, exerted by pressure oil, borne by the conical valve element in the adjustment process is effectively reduced, corresponding decompression adjustment is convenient to achieve, and the decompression adjustment precision and adjustment efficiency can be effectively guaranteed.

Description

technical field [0001] The present invention relates to a pressure relief valve. Background technique [0002] Synthetic equipment for synthetic diamond in my country is a six-sided top press. The pressure of the hydraulic press is as high as 100MPa, and a set of ultra-high pressure hydraulic system is correspondingly equipped. The main function of the ultra-high pressure hydraulic system is to provide high-pressure hydraulic oil during the pressing process of the hydraulic press, and to maintain the pressure during the diamond synthesis process. After the synthesis, the hydraulic system needs to unload the pressure to about 6MPa, and thus complete a work cycle. [0003] During the unloading process of the hydraulic system, the pressure relief speed and pressure relief control accuracy are crucial to the synthesis of diamonds. Improper pressure relief control will cause serious consequences, such as blasting, cracking hammers, and affecting the production and stability of sy...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a pressure relief valve to solve the technical problem in the prior art that the pressure of the liquid medium directly acts on the control valve stem, resulting in relatively large resistance to pressure relief and precise adjustment under high pressure conditions.

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