Variable-diameter throttling orifice plate

Abstract

In order to solve the technical problem that in the prior art, time and labor are consumed due to the fact that in the process of accurately designing a throttling orifice plate, the throttling orifice plate needs to be disassembled for multiple times and reprocessed and installed, the embodiment of the invention provides a variable-diameter throttling orifice plate. The variable-diameter throttling orifice plate comprises a mounting plate, a plurality of hole diameter adjusting plates and a transmission mechanism; the mounting plate is used for being rotatably provided with a plurality of hole diameter adjusting plates; second forming surfaces of all the hole diameter adjusting plates jointly form a circular throttling hole; and the transmission mechanism is in transmission connection with each hole diameter adjusting plate and is used for synchronously changing the rotation angle of each hole diameter adjusting plate so as to change the diameter of the throttling hole. According to the embodiment of the invention, the diameter of the throttling hole defined by the second forming surfaces of all the hole diameter adjusting plates is adjusted by adjusting the rotation angles of the hole diameter adjusting plates, so that the change of the hole diameter of the throttling hole of the throttling hole plate is realized, the situation that the throttling hole plate is repeatedly disassembled and reprocessed and installed in the design process is avoided, and the test efficiency is improved.

Description

technical field [0001] The invention relates to a variable-diameter throttling orifice. Background technique [0002] The orifice plate is a common resistance member in the pipeline system for conveying fluid, and it is widely used because of its simple structure and great role in the system. When water flows through the throttling orifice, a throttling shrinkage surface will be formed behind the orifice due to the characteristics of the orifice structure. The velocity of the fluid at the constriction is the highest, but the pressure is the lowest. Once the pressure at the shrinking surface is lower than the saturated vapor pressure of water, the water will vaporize and generate a large number of bubbles. When the bubbles move to the high-pressure area downstream of the orifice plate, the pressure of the bubbles will be greater than the vaporization pressure, and the bubbles will collapse. . [0003] The time for bubble collapse is very short, only a few hundredths of a s...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the technical problem existing in the prior art that in the process of accurately designing the throttle orifice, it is time-consuming and laborious to dismantle and reprocess and install the throttle orifice multiple times, the embodiment of the present invention provides a variable-diameter throttle orifice

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