Wide-range pressure regulation valve

Abstract

The invention discloses a wide-range pressure regulation valve. The invention mainly aims to provide the pressure regulation valve which is used on a screw pump performance testing table and is used in testing of a screw pump. The wide-range pressure regulation valve is characterized in that a valve body, a valve core, a valve plug, a valve deck and an execution mechanism are coaxially arranged; amedium inlet and a medium outlet which are provided with threads are formed in the valve body; the medium inlet communicates with the medium outlet through an L-shaped liquid passage; an inlet and anoutlet of a diversion valve separately communicate with the medium inlet and the medium outlet; the valve core is arranged vertical to the L-shaped liquid passage; a central cavity is formed in the valve core; an irregular liquid outlet is formed in the outer wall of the cavity; the valve plug is located in the central cavity; the valve plug can move vertically so that the irregular liquid outletis completely closed or completely opened; the irregular liquid outlet consists of two right trapezoids; the vertical length of the irregular liquid outlet is at least half of the height of the valvecore; the irregular liquid outlet faces to the medium outlet in the valve body; a valve plug bottom small hole and a valve plug side surface small hole are formed in the bottom of the valve plug.

Description

technical field [0001] The invention relates to a large-range pressure regulating valve used for testing screw pumps on a screw pump performance test bench. Background technique [0002] At this stage, the screw pumps used in oil production in my country have reached thousands of meters underground. In actual production, it is necessary to use the screw pump performance test bench to test the performance of the screw pump. During the test, it is necessary to install a pressure regulating valve at the outlet of the screw pump for pressure simulation. However, the technical problems encountered at present are: the pressure adjustment range and flow adjustment range that the existing pressure regulating valve can meet are relatively small, and the relationship between the stroke and pressure of the pressure regulating valve is not linear. The range of change with the stroke is very large. In the case of a large opening, the change of the pressure with the stroke is very small,...

AI Technical Summary

Problems solved by technology

However, the technical problems encountered at present are: the pressure adjustment range and flow adjustment range that the existing pressure regulating valve can meet are relatively small, and the relationship between the stroke and pressure of the pressure regulating valve is not linear. The range of change with the stroke is very large. In the case of a large opening, the change of the pressure with the stroke is very small, and it is difficult to adjust the pressure that needs to be adjusted.

Images