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A Structure and Method for Realizing Pressure Oscillation Regulation of Low Temperature Piping System

A pipeline system and low-temperature technology, which is applied in the direction of pipe components, pipes/pipe joints/fittings, mechanical equipment, etc., can solve the problems of liquid level and pressure measurement interference, increase heat loss and harmfulness of low-temperature pipeline systems, and achieve control speed Fast, suppressed adverse pressure oscillations, easy to achieve results

Active Publication Date: 2021-04-27
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Taconis oscillations in low temperature systems are mostly harmful. On the one hand, Taconis oscillations will greatly increase the heat leakage loss in low temperature piping systems; on the other hand, Taconis oscillations will interfere with processes such as liquid level and pressure measurement in low temperature environments

Method used

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  • A Structure and Method for Realizing Pressure Oscillation Regulation of Low Temperature Piping System
  • A Structure and Method for Realizing Pressure Oscillation Regulation of Low Temperature Piping System
  • A Structure and Method for Realizing Pressure Oscillation Regulation of Low Temperature Piping System

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Embodiment

[0041] Open the oscillation control module 3, measure and record the average pressure and pressure oscillation in the low-temperature pipeline 2 system; after using different modes of control elements, the control results of the pressure oscillation in the low-temperature pipeline system are as follows: Figure 4 , where the dotted line is the steady state of zero oscillation. The high and low temperature temperature ratio of the low temperature pipeline is 66.7, the inner diameter of the pipeline is 2.85m, the length of the pipeline is 1m, and the temperature gradient is located in the middle of the low temperature pipeline. Choose a different inner diameter ratio (r / r 0 =0.18,0.35,0.53,0.70,0.88,1.23,1.40,1.75,2.11,2.46,2.81,3.16,3.51), the r / r of expansion regulatory element 3.1 0 >1, r / r of shrinkage control element 3.2 0 Figure 5 a) is the pressure ratio diagram under different inner diameter conditions when the position of the regulating element is x=0m, Figure 5 b)-...

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Abstract

A structure and method for realizing pressure oscillation regulation of a low-temperature pipeline system, comprising a low-temperature liquid storage tank with a built-in low-temperature liquid, and a low-temperature pipeline with an open end connected to the low-temperature liquid storage tank and the other end being closed in the low-temperature liquid storage tank. The internal pressure oscillation adjustment module of the adjustment system is installed on the pipeline. The low-temperature pipeline is located in a normal temperature environment. The low-temperature pipeline and the open end of the low-temperature liquid storage tank together form a temperature gradient distribution along the tube axis, thereby inducing pressure oscillation inside the system. . Since the present invention is provided with a low-temperature pipeline whose open end is connected to the low-temperature liquid storage tank and the other end is closed in the low-temperature liquid storage tank, the internal pressure oscillation control module of the adjustment system is installed on the low-temperature pipeline, and by adjusting the position of the oscillation control module, on the one hand The invention can effectively restrain the unfavorable pressure oscillation in the low-temperature pipeline system. On the other hand, it has a simple structure, is easy to implement, can meet the requirements of different control effects, and has fast control speed and reliable performance.

Description

technical field [0001] The invention relates to a pipeline pressure regulation structure and method, in particular to a structure and method for realizing pressure oscillation regulation of a low-temperature pipeline system. Background technique [0002] The Taconis oscillator system is the simplest thermal-acoustic oscillator, which consists of a cryogenic liquid tank and a cryogenic piping system. When the open section of the semi-closed piping system is in a low temperature environment and the closed section maintains the ambient temperature, a temperature distribution between the hot and cold ends is formed, and oscillations may occur in the pipe. The driving force for Taconis oscillations is provided by the temperature gradient in the direction of the wall. Taconis oscillations widely exist in cryogenic engineering measurements and cryogenic liquid storage systems. Taconis oscillations in low temperature systems are mostly harmful. On the one hand, Taconis oscillation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L55/045
CPCF16L55/045
Inventor 胡露露陈慧亓新刘迎文
Owner XI AN JIAOTONG UNIV
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