Ultra-high pressure automatic pressure relief device

Abstract

The invention discloses an ultrahigh-pressure fully-automatic pressure relief device. The ultrahigh-pressure fully-automatic pressure relief device comprises a main body and a step motor positioned at the right side of the main body, wherein the main body comprises a pressure relief cavity which is through in two sides; the pressure relief cavity comprises a sealing cavity at the left side, a regulating cavity on the middle and a threaded cavity at the right side, wherein a screw plug I at the left side and a valve seat at the right side are arranged in the sealing cavity; an ejector pin which is thin in left portion and thick in right portion is arranged in the regulating cavity; the left end of the ejector pin is equipped with a tip which extends into a valve hole; the threaded cavity is internally matched with a screw; the left end of the screw is bumped, and abuts against the right end of the ejector pin; the right end of the screw is equipped with a shaft hole with a key slot; the shaft hole is in clearance fit with a motor shaft of the step motor through a flat key; the lower end of the main body is equipped with an oil inlet which is fixedly equipped with an oil inlet nozzle; and the oil inlet communicates with a first oil inlet hole path. According to the ultrahigh-pressure fully-automatic pressure relief device disclosed by the invention, the step motor is adopted to drive the screw to regulate movement of the ejector pin, so that the tip is regulated to extend into the valve opening by certain length, and therefore, linear pressure relief is realized, linear changes of system pressure are realized, and a production process curve is met.

Description

technical field [0001] The invention relates to the technical field of automatic adjustment and pressure relief of a hydraulic system, in particular to an ultra-high pressure full-automatic pressure relief device. Background technique [0002] The pressure required by the ultra-high pressure hydraulic system of the existing six-sided top press is generally between 80 and 120 MPa when synthesizing superhard materials. When synthesizing superhard materials, a linearly changing and stable system pressure is required; China with application number 201410635210.8 The patent discloses a gap-type ultra-high pressure pressure relief valve. The pressure relief speed of the pressure relief valve changes in jumps, and the linear change of the system pressure cannot be realized; the Chinese patent application number 201610666876.9 discloses a stepless variable ultra-high pressure pressure relief valve. Servo pressure relief valve, the pressure relief valve uses a servo motor to basicall...

AI Technical Summary

Problems solved by technology

[0002] The pressure required by the ultra-high pressure hydraulic system of the existing six-sided top press is generally between 80 and 120 MPa when synthesizing superhard materials. When synthesizing superhard materials, a linearly changing and stable system pressure is required; China with application number 201410635210.8 The patent discloses a gap-type ultra-high pressure pressure relief valve. The pressure relief speed of the pressure relief valve changes in jumps, and the linear change of the system pressure cannot be realized; the Chinese patent application number 201610666876.9 discloses a stepless variable ultra-high pressure pressure relief valve. Servo pressure relief valve, the pressure relief valve uses a servo motor to provide a stable system pressure, but the distance between the screw and the valve stem is not easy to control, resulting in low pressure relief accuracy

Images