WO2025138474A1 - 低温绝热模块气密性及内部气体流动性测试装置 - Google Patents

低温绝热模块气密性及内部气体流动性测试装置 Download PDF

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Publication number
WO2025138474A1
WO2025138474A1 PCT/CN2024/084335 CN2024084335W WO2025138474A1 WO 2025138474 A1 WO2025138474 A1 WO 2025138474A1 CN 2024084335 W CN2024084335 W CN 2024084335W WO 2025138474 A1 WO2025138474 A1 WO 2025138474A1
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Prior art keywords
pressure
valve
outlet
inlet
inner space
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PCT/CN2024/084335
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English (en)
French (fr)
Inventor
杨光
宋炜
罗威
吴静怡
李晓慈
蔡爱峰
李春煜
余猛
刘丽霞
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Hudong Zhonghua Shipbuilding Group Co Ltd
Shanghai Jiao Tong University
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Hudong Zhonghua Shipbuilding Group Co Ltd
Shanghai Jiao Tong University
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Priority to US19/024,228 priority Critical patent/US20250216286A1/en
Publication of WO2025138474A1 publication Critical patent/WO2025138474A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
    • G01M9/06—Measuring arrangements specially adapted for aerodynamic testing

Definitions

  • the invention relates to the technical field of low-temperature thermal insulation module testing, and in particular to a device for testing the air tightness and internal gas fluidity of a low-temperature thermal insulation module.
  • cryogenic working fluids such as liquefied natural gas, liquid oxygen, liquid nitrogen, liquid hydrogen, liquid helium, etc.
  • the performance test of the cryogenic containment system is the basis for the verification of key technologies and core systems.
  • Related technical research, research and development, prototype manufacturing, and verification all require the support of the cryogenic containment system performance test system.
  • the sealing performance in a low-temperature environment is an important technical indicator of the insulation module and an important guarantee for the safety performance of the cryogenic containment system during operation.
  • the internal space of the insulation module needs to have good gas flow performance in specific areas and directions, so that it can ensure good replacement capabilities for non-inert gases such as water vapor and oxygen.
  • the main purpose of the low-temperature insulation module airtightness and internal gas flow test device is to carry out tightness inspection and adaptability research of the insulation module in a low-temperature environment and test and study the gas flow performance of the internal space, and to examine the change law of the dew point temperature and structural water content of the internal space during inert gas replacement, to provide guidance for the structural design, processing and installation technology of the insulation module, to improve the reliability of independent research and development results, and to provide a technical basis for practical applications such as large storage tanks and liquefied natural gas ships.
  • the system tightness test of the enclosure system insulation module and the gas flow performance test of the internal space include -196°C low temperature conditions
  • the system tightness test of the enclosure system insulation module and the gas flow performance test of the internal space include multiple test targets and multiple test conditions combination;
  • the insulation modules of the enclosure system have many specifications and sizes, and the interface positions vary.
  • the present invention provides a device for testing the air tightness and internal gas fluidity of a low-temperature insulation module, comprising an air intake/liquid intake module, an exhaust/liquid discharge module, and an insulation module
  • the air intake/liquid intake module comprising an inner space liquid nitrogen inlet valve, an outer space liquid nitrogen inlet valve, a low-pressure pressure control module, an inner space high-pressure pressure control module, an outer space high-pressure pressure control module, a buffer tank, a pressure reducing valve, and a filter connected by pipelines
  • the exhaust/liquid discharge module comprising a liquid nitrogen/nitrogen discharge valve, an inner space exhaust valve, and an outer space exhaust valve connected by pipelines
  • the outlets of the inner space liquid nitrogen inlet valve, the low-pressure pressure control module, and the inner space high-pressure pressure control module are connected in parallel to the inlet of the inner space of the insulation module, the outer space high-pressure pressure control module, the The outlet of the outer space liquid nitrogen inlet valve is connected in parallel and connected to the inlet of the outer
  • the exhaust/liquid discharge module also includes a negative pressure exhaust valve, and the outlets of the inner space exhaust valve and the outer space exhaust valve are connected in parallel through the pipeline, and are connected to the negative pressure exhaust interface through the negative pressure exhaust valve.
  • the low-pressure pressure control module includes a low-pressure pressure controller outlet valve, a low-pressure pressure controller inlet valve, and a low-pressure pressure controller connected through the pipeline, the outlet of the low-pressure pressure controller outlet valve serves as the outlet of the low-pressure pressure control module, the low-pressure pressure controller outlet valve is connected to the outlet of the low-pressure pressure controller inlet valve via the low-pressure pressure controller, and the inlet of the low-pressure pressure controller inlet valve serves as the inlet of the low-pressure pressure control module.
  • the inner space high-pressure pressure control module includes an inner space high-pressure pressure controller outlet valve, an inner space high-pressure pressure controller inlet valve, and an inner space high-pressure pressure controller connected through the pipeline, the outlet of the inner space high-pressure pressure controller outlet valve serves as the outlet of the inner space high-pressure pressure control module, the inner space high-pressure pressure controller outlet valve is connected to the outlet of the inner space high-pressure pressure controller inlet valve via the inner space high-pressure pressure controller, and the inlet of the inner space high-pressure pressure controller inlet valve serves as the inlet of the inner space high-pressure pressure control module.
  • the outer space high-pressure pressure control module includes an outer space high-pressure pressure controller outlet valve, an outer space high-pressure pressure controller inlet valve, and an outer space high-pressure pressure controller connected through the pipeline, the outlet of the outer space high-pressure pressure controller outlet valve serves as the outlet of the outer space high-pressure pressure control module, the outer space high-pressure pressure controller outlet valve is connected to the outlet of the outer space high-pressure pressure controller inlet valve via the outer space high-pressure pressure controller, and the inlet of the outer space high-pressure pressure controller inlet valve serves as the inlet of the outer space high-pressure pressure control module.
  • the inner space outlet of the insulation module is connected to the inlet of the inner space exhaust valve via a third pipe and an inner space outlet metal hose
  • the outer space outlet of the insulation module is connected to the inlet of the outer space exhaust valve via a fourth pipe and an outer space outlet metal hose.
  • outlet of the inner space exhaust valve is connected to one end of a fifth pipeline
  • outlet of the outer space exhaust valve is connected to one end of a sixth pipeline
  • the other end of the fifth pipeline and the other end of the sixth pipeline are connected in parallel.
  • first pipeline is provided with an inner space inlet pressure sensor and an inner space inlet temperature sensor
  • second pipeline is provided with an outer space inlet pressure sensor and an outer space inlet temperature sensor
  • first pipeline is provided with an inner space inlet safety valve
  • second pipeline is provided with an outer space inlet safety valve
  • the third pipeline is provided with an inner space outlet safety valve
  • the fourth pipeline is provided with an outer space outlet safety valve
  • the fifth pipeline is provided with an inner space outlet temperature sensor, an inner space outlet oxygen content sensor, and an inner space outlet dew point thermometer
  • the sixth pipeline is provided with an outer space outlet temperature sensor, an outer space outlet oxygen content sensor, and an outer space outlet dew point thermometer.
  • the negative pressure exhaust valve, the liquid nitrogen/nitrogen gas discharge valve, the inner space exhaust valve, the outer space exhaust valve, the inner space liquid nitrogen inlet valve, the low pressure pressure controller outlet valve, the inner space high pressure pressure controller outlet valve, the outer space high pressure pressure controller outlet valve, and the outer space liquid nitrogen inlet valve are low temperature valves with an operating temperature of -196°C.
  • the inner space exhaust valve, the outer space exhaust valve, the inner space liquid nitrogen inlet valve, the low-pressure pressure controller outlet valve, the inner space high-pressure pressure controller outlet valve, the outer space high-pressure pressure controller outlet valve, and the outer space liquid nitrogen inlet valve are pneumatic valves.
  • the negative pressure exhaust valve, the liquid nitrogen/nitrogen gas exhaust valve, the low-pressure pressure controller air intake valve, the inner space high-pressure pressure controller air intake valve, and the outer space high-pressure pressure controller air intake valve are solenoid valves.
  • the negative pressure exhaust valve, the liquid nitrogen/nitrogen gas discharge valve, the inner space exhaust valve, the outer space exhaust valve, the inner space liquid nitrogen inlet valve, the low pressure pressure controller outlet valve, the low pressure pressure controller inlet valve, the inner space high pressure pressure controller outlet valve, the inner space high pressure pressure controller inlet valve, the outer space high pressure pressure controller outlet valve, the outer space high pressure pressure controller inlet valve, and the outer space liquid nitrogen inlet valve are fixed to the pipeline by welding.
  • the low-pressure pressure controller, the inner-space high-pressure pressure controller, the outer-space high-pressure pressure controller and the pipeline are fixed via a vacuum coupling radius (VCR) sealing interface.
  • VCR vacuum coupling radius
  • the inner space outlet oxygen content sensor, the inner space outlet dew point thermometer, the outer space outlet oxygen content sensor, the outer space outlet dew point thermometer and the pipeline are fixed via a vacuum connection radial sealing interface.
  • the inner space inlet pressure sensor, the inner space inlet temperature sensor, the outer space inlet pressure sensor and the outer space inlet temperature sensor are fixed to the pipeline by threaded connection.
  • first pipeline, the second pipeline, the third pipeline, and the fourth pipeline are stainless steel pipes.
  • the inner space inlet metal hose, the outer space inlet metal hose, the inner space outlet metal hose, and the outer space outlet metal hose are fixed to the insulation module through a vacuum connection radial sealing interface, and the inner space inlet metal hose, the outer space inlet metal hose, the inner space outlet metal hose, and the outer space outlet metal hose are fixed to the first pipe, the second pipe, the third pipe, and the fourth pipe by welding.
  • the inner space and the outer space are continuous channels with boundaries sealed by seams of thermal insulation modules.
  • the present invention mainly has the following advantages:
  • valves and pressure controllers Use the combination of valves and pressure controllers in parallel.
  • valve By using the valve to control the flow direction of the fluid, different test objectives can be carried out synchronously or in parallel based on the test type and process.
  • the same test system can be used to carry out different test contents, improve test efficiency, and reduce test costs.
  • the type of metal hose and vacuum connection radial sealing interface is the main connection method of the low-temperature insulation module airtightness and internal gas flow test device.
  • the space compensation characteristics of the metal hose are used to achieve compatibility with different enclosure system insulation module specifications and interface positions.
  • the detachability of the VCR sealing interface is used to achieve the replaceability of the internal components of the device.
  • the airtightness and internal space gas flow performance tests of low-temperature enclosure system insulation modules of different sizes can be realized, and the replacement of low-temperature enclosure system insulation module specimens is convenient and the disassembly and assembly are efficient.
  • FIG1 is a system composition diagram of an embodiment of the present invention.
  • FIG2 is a schematic structural diagram of an exhaust/drain module according to an embodiment of the present invention.
  • FIG3 is a schematic structural diagram of an air intake/liquid intake module according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a thermal insulation module according to an embodiment of the present invention.
  • This embodiment provides a system that can be used to test the air tightness of a cryogenic enclosure system and the gas flow performance of the internal space.
  • Negative pressure exhaust valve 2 liquid nitrogen/nitrogen gas discharge valve 3, inner space exhaust valve 4, outer space exhaust valve 5, inner space liquid nitrogen inlet valve 6, low pressure pressure controller outlet valve 7, low pressure pressure controller inlet valve 8, inner space high pressure pressure controller outlet valve 9, inner space high pressure pressure controller inlet valve 10, outer space high pressure pressure controller outlet valve 11, outer space high pressure pressure controller inlet valve 12, outer space liquid nitrogen inlet valve 13, pressure reducing valve 14, inner space outlet pressure sensor 15, outer space outlet pressure sensor 16, inner space outlet pressure sensor 17, outer space outlet pressure sensor 18, inner space outlet pressure sensor 19, inner space outlet pressure sensor 20, outer space outlet pressure sensor 21, outer space outlet pressure sensor 22, inner space outlet pressure sensor 23, outer space outlet pressure sensor 24, inner space outlet pressure sensor 25, outer space outlet pressure sensor 26, inner space outlet pressure sensor 27, inner space outlet pressure sensor 28, inner space outlet pressure sensor 29, inner space outlet pressure sensor 30, outer space outlet pressure sensor 31, outer space outlet pressure sensor 32, inner space outlet pressure sensor 33, outer space outlet pressure sensor 34, inner space outlet pressure sensor 35, outer space outlet pressure sensor 36, inner space outlet pressure sensor 37, inner space outlet pressure sensor 38, inner space outlet pressure
  • the low pressure controller outlet valve 7, the low pressure controller 27, and the low pressure controller inlet valve 8 are connected in series in sequence to form a low pressure control module;
  • the inner space high pressure controller outlet valve 9, the inner space high pressure controller 28, and the inner space high pressure controller inlet valve 10 are connected in series in sequence to form an inner space high pressure control module;
  • the outer space high pressure controller outlet valve 11, the outer space high pressure controller 29, and the outer space high pressure controller inlet valve 12 are connected in series in sequence to form an outer space high pressure control module.
  • the inner space liquid nitrogen inlet valve 6, the outer space liquid nitrogen inlet valve 13, the low pressure pressure control module, the inner space high pressure pressure control module, the outer space high pressure pressure control module, the buffer tank 34, the pressure reducing valve 14, and the filter 35 constitute the air intake/liquid intake module 200
  • the negative pressure exhaust valve 2 the liquid nitrogen/nitrogen gas discharge valve 3, the inner space exhaust valve 4, and the outer space exhaust valve 5 constitute the exhaust/liquid discharge module 100.
  • the outlet of the air intake/liquid intake module 200 is connected to the inlet of the insulation module 1
  • the inlet of the exhaust/liquid discharge module 100 is connected to the outlet of the insulation module 1.
  • the outlets of the low-pressure pressure controller outlet valve 7, the inner space liquid nitrogen inlet valve 6, and the inner space high-pressure pressure controller outlet valve 9 are connected in parallel and connected to the first pipeline 40, the first pipeline 40 is connected to the inlet of the inner space 46 through the inner space inlet metal hose 38, and the outlets of the outer space high-pressure pressure controller outlet valve 11 and the outer space liquid nitrogen inlet valve 13 are connected in parallel and connected to the inlet of the outer space 47.
  • the outlet of the inner space 46 is connected to one end of the inner space outlet metal hose 36, and the other end of the inner space outlet metal hose 36 is connected to the inlet of the inner space exhaust valve 4 through the third pipeline 42.
  • the outlet of the inner space exhaust valve 4 is connected to the negative pressure exhaust valve 2 and the liquid nitrogen/nitrogen gas discharge valve 3 through the fifth pipeline 44.
  • the outlet of the outer space 47 is connected to one end of the outer space outlet metal hose 37, and the other end of the outer space outlet metal hose 37 is connected to the inlet of the outer space exhaust valve 5 through the fourth pipe 43, and the outlet of the outer space exhaust valve 5 is connected to the negative pressure exhaust valve 2 and the liquid nitrogen/nitrogen exhaust valve 3 through the sixth pipe 45.
  • All valves and pipelines are fixed by welding, all pressure controllers, all dew point thermometers, all oxygen content sensors and pipelines are fixed by VCR sealing interfaces, all pressure sensors, temperature sensors and pipelines are fixed by threaded connections, all metal hoses and insulation modules are fixed by VCR sealing interfaces, and all metal hoses and pipelines are fixed by welding.
  • Negative pressure exhaust valve 2 liquid nitrogen/nitrogen gas discharge valve 3, inner space exhaust valve 4, outer space exhaust valve 5, inner space liquid nitrogen inlet valve 6, low pressure pressure controller outlet valve 7, inner space high pressure pressure controller outlet valve 9, outer space high pressure pressure controller outlet valve 11, outer space liquid nitrogen inlet valve 13 are low temperature valves with an operating temperature of -196°C.
  • Inner space exhaust valve 4 outer space exhaust valve 5, inner space liquid nitrogen inlet valve 6, low pressure pressure controller outlet valve 7, inner space high pressure pressure controller outlet valve 9, outer space high pressure pressure controller outlet valve 11, outer space liquid nitrogen inlet valve 13 are pneumatic valves, negative pressure exhaust valve 2, liquid nitrogen/nitrogen discharge valve 3, low pressure pressure controller inlet valve 8, inner space high pressure pressure controller inlet valve 10, outer space high pressure pressure controller inlet valve 12 For the solenoid valve.
  • the low-pressure pressure controller outlet valve 7 and the low-pressure pressure controller inlet valve 8 are opened, the inner space exhaust valve 4, the inner space liquid nitrogen inlet valve 6, and the outer space liquid nitrogen inlet valve 13 are closed, and the nitrogen passes through the filter 35 and is reduced in pressure by the pressure reducing valve 14, then enters the buffer tank 34 to stabilize the gas flow, and then enters the inner space of the insulation module 1 after precise pressure control by the low-pressure pressure controller 27.
  • the pressure change in the system is monitored by the inner space outlet pressure sensor 15 and the inner space inlet pressure sensor 17. Subsequently, the value of the low-pressure pressure controller 27 is adjusted to change the system pressure, and multiple value repeated tests are carried out to obtain the low-temperature tightness test results of the insulation module of the low-temperature enclosure system.
  • the nitrogen pressure entering the system is initially reduced by adjusting the pressure reducing valve 14, and stabilized by the buffer tank 34, and then the inner space high pressure pressure controller 28 is set to accurately control the pressure, so that constant pressure nitrogen enters the inner space inside the insulation module 1.
  • the nitrogen pressure entering the system is initially reduced and stabilized by the buffer tank 34, and then the outer space high-pressure pressure controller 29 is set to accurately control the pressure so that constant pressure nitrogen enters the outer space inside the insulation module 1.
  • the outer space outlet oxygen content sensor 24 and the outer space outlet dew point thermometer 26 are monitored to evaluate the change in structural water content during the gas flow process in the outer space inside the insulation module 1. Subsequently, the setting value of the outer space high-pressure pressure controller 29 is adjusted to change the system pressure, and the nitrogen remaining in the system is extracted by opening the negative pressure exhaust valve 2. Multiple value repeated tests are carried out to obtain the test results of the outer space gas flow performance inside the low-temperature enclosure system.
  • the inner space exhaust valve 4 By opening the liquid nitrogen/nitrogen discharge valve 3, the inner space exhaust valve 4, the outer space exhaust valve 5, the inner space high-pressure pressure controller outlet valve 9, the inner space high-pressure pressure controller inlet valve 10, the outer space high-pressure pressure controller outlet valve 11, and the outer space high-pressure pressure controller inlet valve 12, closing the negative pressure exhaust valve 2, the inner space liquid nitrogen inlet valve 6, the low pressure pressure controller outlet valve 7, and the outer space liquid nitrogen inlet valve 13, and by adjusting the pressure reducing valve 14, the nitrogen pressure entering the system is initially reduced and is carried out through the buffer tank 34.
  • the inner space high pressure pressure controller 28 and the outer space high pressure pressure controller 29 for precise pressure control, so that constant pressure nitrogen enters the inner space inside the insulation module and the outer space inside the insulation module, and at the same time, monitor the values of the inner space outlet oxygen content sensor 23, the inner space outlet dew point thermometer 25, the outer space outlet oxygen content sensor 24, and the outer space outlet dew point thermometer 26 to evaluate the changes in the structural water content of the gas flow process in the inner space inside the insulation module 1 and the outer space inside the insulation module 1.

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  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

一种低温绝热模块气密性及内部气体流动性测试装置，包括进气/进液模块（200）、排气/排液模块（100）、绝热模块（1），进气/进液模块（200）包括通过管道连接的内层空间液氮进液阀（6）、外层空间液氮进液阀（13）、低压压力控制模块、内层空间高压压力控制模块、外层空间高压压力控制模块、缓冲罐（34）、减压阀（14）、过滤器（35），排气/排液模块（100）包括通过管道连接的液氮/氮气排放阀（3）、内层空间排气阀（4）、外层空间排气阀（5），进气/进液模块（200）的出口连接至绝热模块（1）进口，排气/排液模块（100）的进口连接至绝热模块（1）的出口。装置可实现绝热模块（1）在低温工况与常温工况下的密性检验及适应性研究、内部空间气体流动性能测试和研究。

Description

低温绝热模块气密性及内部气体流动性测试装置 技术领域
本发明涉及低温绝热模块测试技术领域，尤其涉及一种低温绝热模块气密性及内部气体流动性测试装置。
背景技术
低温工质(如液化天然气、液氧、液氮、液氢、液氦等)储运系统和装备的创新发展离不开对绝热材料性能测试、绝热结构设计、低温性能测试等各种低温技术的持续研究和创新改进，低温围护系统性能测试是关键技术和核心系统验证的基础，相关技术攻关、研发、样机制造以及验证均需要有低温围护系统性能测试系统进行支撑。在低温环境下的密封性能是绝热模块的重要技术指标，是低温围护系统在运营过程中安全性能的重要保障，同时，绝热模块内部空间在特定区域和方向上需要有良好的气体流动性能，使之能够保证对水蒸气、氧气等非惰性气体良好置换能力。低温绝热模块气密性及内部气体流动性测试装置的主要目的在于开展绝热模块在低温环境下密性检验及适应性研究与内部空间气体流动性能测试和研究，考察在惰气置换时内部空间露点温度和结构含水量的变化规律，为绝热模块的结构设计及加工与安装工艺提供指导，提高自主研制成果的可靠性，为大型储罐、液化天然气船等实际应用提供技术基础。
经检索，目前尚未发现已公开的用于低温绝热模块气密性及内部空间气体流动性能测试的系统或类似测试系统。因此，对于低温工况与常温工况下的低温围护系统绝热模块系统密性及内部空间气体流动性能的测试技术还缺乏。为提高低温围护系统密性及内部空间气体流动性能测试水平及测试结果的可靠性、拓展多工况测试能力、提升测试效率、降低测试成本，对适用于低温绝热模块气密性及内部空间气体流动性测试装置研制能力提出了更高要求。
因此，本领域的技术人员致力于开发一种适用于低温绝热模块气密性及内部空间气体流动性测试装置，可满足于低温绝热模块在低温工况与常温工况下开展密性检验及适应性研究与内部空间气体流动性能测试和研究。
发明内容
有鉴于现有技术的上述缺陷，本发明所要解决的技术问题是：
1、对于低温工况与常温工况下的低温围护系统绝热模块系统密性及内部空间气体流动性能的测试技术还缺乏；
2、低温工况与常温工况下的低温围护系统绝热模块系统密性及内部空间气体流动性能测试需要多压力梯度、独立压力控制；
3、围护系统绝热模块系统密性及内部空间气体流动性能测试包含-196℃低温工况；
4、围护系统绝热模块系统密性及内部空间气体流动性能测试包含多试验目标、多试验工况组合方式；
5、围护系统绝热模块规格尺寸种类较多，接口位置各异。
为实现上述目的，本发明提供了一种低温绝热模块气密性及内部气体流动性测试装置，包括进气/进液模块、排气/排液模块、绝热模块，所述进气/进液模块包括通过管道连接的内层空间液氮进液阀、外层空间液氮进液阀、低压压力控制模块、内层空间高压压力控制模块、外层空间高压压力控制模块、缓冲罐、减压阀、过滤器，所述排气/排液模块包括通过管道连接的液氮/氮气排放阀、内层空间排气阀、外层空间排气阀，所述内层空间液氮进液阀、所述低压压力控制模块、所述内层空间高压压力控制模块的出口并联并连接至绝热模块的内层空间的进口，所述外层空间高压压力控制模块、所述外层空间液氮进液阀的出口并联并连接至所述绝热模块的外层空间的进口；所述低压压力控制模块、所述内层空间高压压力控制模块、所述外层空间高压压力控制模块的进口并联连接，并依次连接所述缓冲罐、所述减压阀、所述过滤器后连接氮气流入接口；所述内层空间液氮进液阀、所述外层空间液氮进液阀的进口分别连接液氮流入接口，所述绝热模块的所述内层空间出口连接至所述内层空间排气阀的进口，所述绝热模块的所述外层空间出口连接至所述外层空间排气阀的进口，所述内层空间排气阀、所述外层空间排气阀的出口并联连接，并经所述液氮/氮气排放阀连接液氮/氮气排放接口。
进一步地，所述排气/排液模块还包括负压抽气阀，所述内层空间排气阀、所述外层空间排气阀的出口通过所述管道并联连接，并经所述负压抽气阀连接负压抽气接口。
进一步地，所述低压压力控制模块包括通过所述管道连接的低压压力控制器出气阀、低压压力控制器进气阀、低压压力控制器，所述低压压力控制器出气阀的出口作为所述低压压力控制模块的所述出口，所述低压压力控制器出气阀经所述低压压力控制器连接至所述低压压力控制器进气阀的出口，所述低压压力控制器进气阀的进口作为所述低压压力控制模块的所述进口。
进一步地，所述内层空间高压压力控制模块包括通过所述管道连接的内层空间高压压力控制器出气阀、内层空间高压压力控制器进气阀、内层空间高压压力控制器，所述内层空间高压压力控制器出气阀的出口作为所述内层空间高压压力控制模块的所述出口，所述内层空间高压压力控制器出气阀经所述内层空间高压压力控制器连接至所述内层空间高压压力控制器进气阀的出口，所述内层空间高压压力控制器进气阀的进口作为所述内层空间高压压力控制模块的所述进口。
进一步地，所述外层空间高压压力控制模块包括通过所述管道连接的外层空间高压压力控制器出气阀、外层空间高压压力控制器进气阀、外层空间高压压力控制器，所述外层空间高压压力控制器出气阀的出口作为所述外层空间高压压力控制模块的所述出口，所述外层空间高压压力控制器出气阀经所述外层空间高压压力控制器连接至所述外层空间高压压力控制器进气阀的出口，所述外层空间高压压力控制器进气阀的进口作为所述外层空间高压压力控制模块的所述进口。
进一步地，所述内层空间液氮进液阀、所述低压压力控制模块、所述内层空间高压压力控制模块的出口并联，经第一管道、内层空间进口金属软管连接至所述绝热模块的所述内层空间的所述进口；所述外层空间高压压力控制模块、所述外层空间液氮进液阀的出口并联，经第二管道、外层空间进口金属软管连接至所述绝热模块的所述外层空间的所述进口。
进一步地，所述绝热模块的所述内层空间出口经第三管道、内层空间出口金属软管连接至所述内层空间排气阀的所述进口，所述绝热模块的所述外层空间出口经第四管道、外层空间出口金属软管连接至所述外层空间排气阀的所述进口。
进一步地，所述内层空间排气阀的所述出口连接至第五管道的一端，所述外层空间排气阀的出口连接至第六管道的一端，所述第五管道的另一端和所述第六管道的另一端并联连接。
进一步地，所述第一管道上设置有内层空间进口压力传感器和内层空间进口温度传感器；所述第二管道上设置有外层空间进口压力传感器和外层空间进口温度传感器。
进一步地，所述第一管道上还设置有内层空间进口安全阀，所述第二管道上还设置有外层空间进口安全阀。
进一步地，所述第三管道上设置有内层空间出口安全阀，所述第四管道上设置有外层空间出口安全阀。
进一步地，所述第五管道上设置有内层空间出口温度传感器、内层空间出口氧含量传感器、内层空间出口露点温度计，所述第六管道上设置有外层空间出口温度传感器、外层空间出口氧含量传感器、外层空间出口露点温度计。
进一步地，所述负压抽气阀、所述液氮/氮气排放阀、所述内层空间排气阀、所述外层空间排气阀、所述内层空间液氮进液阀、所述低压压力控制器出气阀、所述内层空间高压压力控制器出气阀、所述外层空间高压压力控制器出气阀、所述外层空间液氮进液阀为低温阀门，工作温度为-196℃。
进一步地，所述内层空间排气阀、所述外层空间排气阀、所述内层空间液氮进液阀、所述低压压力控制器出气阀、所述内层空间高压压力控制器出气阀、所述外层空间高压压力控制器出气阀、所述外层空间液氮进液阀为气动阀。
进一步地，所述负压抽气阀、所述液氮/氮气排放阀、所述低压压力控制器进气阀、所述内层空间高压压力控制器进气阀、外层空间高压压力控制器进气阀为电磁阀。
进一步地，所述负压抽气阀、所述液氮/氮气排放阀、所述内层空间排气阀、所述外层空间排气阀、所述内层空间液氮进液阀、所述低压压力控制器出气阀、所述低压压力控制器进气阀、所述内层空间高压压力控制器出气阀、所述内层空间高压压力控制器进气阀、所述外层空间高压压力控制器出气阀、外层空间高压压力控制器进气阀、所述外层空间液氮进液阀与所述管道通过焊接固定。
进一步地，所述低压压力控制器、所述内层空间高压压力控制器、外层空间高压压力控制器与所述管道通过真空连接径向(vacuum coupling radius,VCR)密封接口固定。
进一步地，所述内层空间出口氧含量传感器、所述内层空间出口露点温度计、所述外层空间出口氧含量传感器、所述外层空间出口露点温度计与所述管道通过真空连接径向密封接口固定。
进一步地，所述内层空间进口压力传感器、所述内层空间进口温度传感器、所述外层空间进口压力传感器和所述外层空间进口温度传感器与所述管道通过螺纹连接固定。
进一步地，所述第一管道、所述第二管道、所述第三管道、所述第四管道为不锈钢管。
进一步地，所述内层空间进口金属软管、所述外层空间进口金属软管、内层空间出口金属软管、所述外层空间出口金属软管与所述绝热模块通过真空连接径向密封接口固定，所述内层空间进口金属软管、所述外层空间进口金属软管、内层空间出口金属软管、所述外层空间出口金属软管与所述第一管道、所述第二管道、所述第三管道、所述第四管道通过焊接固定。
进一步地，所述内层空间与所述外层空间为由绝热模块接缝所围成的边界密封的连续通道。
与现有技术相比，本发明主要具有以下优点：
(1)完成低温工况(液氮温区)与常温工况(室温温区)下密性及内部空间气体流动性能的测试技术的建立。低温流体输送过程控制原理，实现不同流程及测试工况下的低温围护系统绝热模块系统密性及内部空间气体流动性能测试。填补了低温工况(液氮温区)与常温工况(室温温区)下的低温围护系统绝热模块系统密性及内部空间气体流动性能的测试技术空白。
(2)引入分级精确压力控制技术，通过减压阀与三组压力控制器串联压力控制。减压阀与高精度压力控制器串联，一级减压后精确压力控制，并独立控制低温与常温流体输入压力。可实现低温围护系统绝热模块内层空间与外层空间的独立精确压力控制。
(3)引入液氮输入及流程控制技术。-196℃液氮直接流入围护系统绝热模块内部，通过自身潜热对围护系统绝热模块进行换热降温。可实现低温围护系统绝热模块预冷， 从而完成低温围护系统绝热模块低温状态下密性测试。
(4)采用阀门与压力控制器组合并联的方式。利用阀门对流体流向的控制，以试验种类与流程为依据，实现不同试验目标的同步或并行开展。可实现同一试验系统装置开展不同试验内容的目的，提高了试验效率，降低了试验成本。
(5)采用金属软管与真空连接径向密封接口的型式为低温绝热模块气密性及内部气体流动性测试装置主要连接方式。利用金属软管的空间补偿特性，实现不同围护系统绝热模块规格及接口位置的兼容。利用VCR密封接口的可拆性，实现装置内部部件的可更换。可实现不同尺寸规格的低温围护系统绝热模块密性及内部空间气体流动性能测试，更换低温围护系统绝热模块试件便捷，拆装高效。
以下将结合附图对本发明的构思、具体结构及产生的技术效果作进一步说明，以充分地了解本发明的目的、特征和效果。
附图说明
图1是本发明的一个实施例的系统组成图；
图2是本发明的一个实施例的排气/排液模块的结构示意图；
图3是本发明的一个实施例的进气/进液模块的结构示意图；
图4是本发明的一个实施例的绝热模块的结构示意图。
具体实施方式
以下参考说明书附图介绍本发明的优选实施例，使本发明更加清楚和便于理解。本发明可以通过许多不同形式的实施例来得以体现，本发明的保护范围并非仅限于文中提到的实施例。
在附图中，结构相同的部件以相同数字标号表示，各处结构或功能相似的组件以相似数字标号表示。
本实施例提供一种可应用于低温围护系统气密性及内部空间气体流动性能测试系统。
负压抽气阀2、液氮/氮气排放阀3、内层空间排气阀4、外层空间排气阀5、内层空间液氮进液阀6、低压压力控制器出气阀7、低压压力控制器进气阀8、内层空间高压压力控制器出气阀9、内层空间高压压力控制器进气阀10、外层空间高压压力控制器出气阀11、外层空间高压压力控制器进气阀12、外层空间液氮进液阀13、减压阀14、内层空间出口压力传感器15、外层空间出口压力传感器16、内层空间进口压力传感器17、外层空间进口压力传感器18、内层空间出口温度传感器19、外层空间出口温度传感器20、内层空间进口温度传感器21、外层空间进口温度传感器22、内层空间出口氧含量传感器23、外层空间出口氧含量传感器24、内层空间出口露点温度计25、外层空间出口露点温度计26、低压压力控制器27、内层空间高压压力控制器28、 外层空间高压压力控制器29、内层空间出口安全阀30、外层空间出口安全阀31、内层空间进口安全阀32、外层空间进口安全阀33、缓冲罐34、过滤器35分别按图1至图4所示通过管道连接，再通过内层空间出口金属软管36、外层空间出口金属软管37、内层空间进口金属软管38、外层空间进口金属软管39与绝热模块1连接。具体地，低压压力控制器出气阀7、低压压力控制器27、低压压力控制器进气阀8依次串联连接构成低压压力控制模块；内层空间高压压力控制器出气阀9、内层空间高压压力控制器28、内层空间高压压力控制器进气阀10依次串联连接构成内层空间高压压力控制模块；外层空间高压压力控制器出气阀11、外层空间高压压力控制器29、外层空间高压压力控制器进气阀12依次串联连接构成外层空间高压压力控制模块。内层空间液氮进液阀6、外层空间液氮进液阀13、低压压力控制模块、内层空间高压压力控制模块、外层空间高压压力控制模块、缓冲罐34、减压阀14、过滤器35构成进气/进液模块200，负压抽气阀2、液氮/氮气排放阀3、内层空间排气阀4、外层空间排气阀5构成排气/排液模块100。进气/进液模块200的出口连接至绝热模块1进口，排气/排液模块100的进口连接至绝热模块1的出口。
低压压力控制器出气阀7、内层空间液氮进液阀6、内层空间高压压力控制器出气阀9的出口并联并连接至第一管道40，第一管道40通过内层空间进口金属软管38连接至内层空间46的进口，外层空间高压压力控制器出气阀11和外层空间液氮进液阀13的出口并联并连接至外层空间47的进口。内层空间46的出口连接内层空间出口金属软管36的一端，内层空间出口金属软管36的另一端连接通过第三管道42连接至内层空间排气阀4的进口。内层空间排气阀4的出口通过第五管道44连接至负压抽气阀2和液氮/氮气排放阀3。外层空间47的出口连接外层空间出口金属软管37的一端，外层空间出口金属软管37的另一端通过第四管道43连接至外层空间排气阀5的进口，外层空间排气阀5的出口通过第六管道45连接至负压抽气阀2和液氮/氮气排放阀3。
所有阀门与管道通过焊接固定，所有压力控制器、所有露点温度计、所有氧含量传感器与管道通过VCR密封接口固定，所有压力传感器、温度传感器与管道通过螺纹连接固定，所有金属软管与绝热模块通过VCR密封接口固定，所有金属软管与管道通过焊接固定。
负压抽气阀2、液氮/氮气排放阀3、内层空间排气阀4、外层空间排气阀5、内层空间液氮进液阀6、低压压力控制器出气阀7、内层空间高压压力控制器出气阀9、外层空间高压压力控制器出气阀11、外层空间液氮进液阀13为低温阀门，工作温度为-196℃。
内层空间排气阀4、外层空间排气阀5、内层空间液氮进液阀6、低压压力控制器出气阀7、内层空间高压压力控制器出气阀9、外层空间高压压力控制器出气阀11、外层空间液氮进液阀13为气动阀，负压抽气阀2、液氮/氮气排放阀3、低压压力控制器进气阀8、内层空间高压压力控制器进气阀10、外层空间高压压力控制器进气阀12 为电磁阀。
本实施例至少能实现五种工作过程：
a.低温围护系统绝热模块常温(室温温区)密性测试模式：
通过开启低压压力控制器出气阀7、低压压力控制器进气阀8，关闭内层空间排气阀4，氮气通过过滤器35后由减压阀14一级减压，随后进入缓冲罐34稳定气流，再通过低压压力控制器27精确压力控制后，进入绝热模块1内层空间，压力稳定后通过内层空间出口压力传感器15、内层空间进口压力传感器17监测系统压力变化情况。随后，调节低压压力控制器27数值，改变系统压力，开展多数值重复试验，得到低温围护系统绝热模块常温密性试验结果。
b.低温围护系统绝热模块预冷模式：
通过开启内层空间液氮进液阀6、外层空间液氮进液阀13、内层空间排气阀4、外层空间排气阀5、液氮/氮气排放阀3，关闭低压压力控制器出气阀7、内层空间高压压力控制器出气阀9、外层空间高压压力控制器出气阀11、负压抽气阀2，通过调节内层空间液氮进液阀6、外层空间液氮进液阀13开度，缓慢向绝热模块1通入液氮，监测内层空间出口温度传感器19、外层空间出口温度传感器20、内层空间进口温度传感器21、外层空间进口温度传感器22读数，当内层空间出口温度传感器19、外层空间出口温度传感器20所示温度达到液氮温区，即可认为围护系统绝热模块预冷完成。
c.低温围护系统绝热模块低温(液氮温区)密性测试模式：
当绝热模块1预冷完成后，通过开启低压压力控制器出气阀7、低压压力控制器进气阀8，关闭内层空间排气阀4、内层空间液氮进液阀6、外层空间液氮进液阀13，氮气通过过滤器35后由减压阀14一级减压，随后进入缓冲罐34稳定气流，再通过低压压力控制器27精确压力控制后，进入绝热模块1内层空间，压力稳定后通过内层空间出口压力传感器15、内层空间进口压力传感器17监测系统内压力变化情况。随后，调节低压压力控制器27数值，改变系统压力，开展多数值重复试验，得到低温围护系统绝热模块低温密性试验结果。
d.低温围护系统绝热模块内部内层空间气体流动性能测试模式：
通过开启液氮/氮气排放阀3、内层空间排气阀4、内层空间高压压力控制器出气阀9、内层空间高压压力控制器进气阀10，关闭低压压力控制器出气阀7、外层空间排气阀5、负压抽气阀2、内层空间液氮进液阀6、外层空间液氮进液阀13、外层空间高压压力控制器出气阀11，通过调节减压阀14，将进入系统的氮气压力初级降低，并通过缓冲罐34进行稳定，随后通过设定内层空间高压压力控制器28精确压力控制，使恒压氮气进入绝热模块1内部内层空间，同时，监测内层空间出口氧含量传感器23、内层空间出口露点温度计25数值，评估绝热模块1内部内层空间气体流动过程结构含水量变化情况。随后，调节内层空间高压压力控制器28设定数值，改变系统压力，并通过开启负压抽气阀2将残留在系统内部的氮气抽出，开展多数值重复试验，得到低 温围护系统内部内层空间气体流动性能测试结果。
e.低温围护系统绝热模块内部外层空间气体流动性能测试模式：
通过开启外层空间排气阀5、液氮/氮气排放阀3、外层空间高压压力控制器出气阀11、外层空间高压压力控制器进气阀12，关闭内层空间排气阀4、负压抽气阀2、内层空间液氮进液阀6、低压压力控制器出气阀7、内层空间高压压力控制器出气阀9、外层空间液氮进液阀13，通过调节减压阀14，将进入系统的氮气压力初级降低，并通过缓冲罐34进行稳定，随后通过设定外层空间高压压力控制器29精确压力控制，使恒压氮气进入绝热模块1内部外层空间，同时，监测外层空间出口氧含量传感器24、外层空间出口露点温度计26数值，评估绝热模块1内部外层空间气体流动过程结构含水量变化情况。随后，调节外层空间高压压力控制器29设定数值，改变系统压力，并通过开启负压抽气阀2将残留在系统内部的氮气抽出，开展多数值重复试验，得到低温围护系统内部外层空间气体流动性能测试结果。
f.低温围护系统的绝热模块内部内层空间与绝热模块内部外层空间之间气体流动性能并联测试模式：
通过开启液氮/氮气排放阀3、内层空间排气阀4、外层空间排气阀5、内层空间高压压力控制器出气阀9、内层空间高压压力控制器进气阀10、外层空间高压压力控制器出气阀11、外层空间高压压力控制器进气阀12，关闭负压抽气阀2、内层空间液氮进液阀6、低压压力控制器出气阀7、外层空间液氮进液阀13，通过调节减压阀14，将进入系统的氮气压力初级降低，并通过缓冲罐34进行稳定，随后通过设定内层空间高压压力控制器28、外层空间高压压力控制器29精确压力控制，使恒压氮气进入绝热模块内部内层空间与绝热模块内部外层空间，同时，监测内层空间出口氧含量传感器23、内层空间出口露点温度计25、外层空间出口氧含量传感器24、外层空间出口露点温度计26数值，评估绝热模块1内部内层空间与绝热模块1内部外层空间气体流动过程结构含水量变化情况。随后，调节内层空间高压压力控制器28、外层空间高压压力控制器29设定数值，改变系统压力，并通过开启负压抽气阀2将残留在系统内部的氮气抽出，开展多数值重复试验，得到低温围护系统绝热模块内部内层空间与绝热模块内部外层空间气体流动性能测试结果。
以上详细描述了本发明的具体实施例。应当理解，本领域的普通技术人员无需创造性劳动就可以根据本发明的构思作出诸多修改和变化。因此，凡本技术领域中技术人员依本发明的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案，皆应在由权利要求书所确定的保护范围内。

Claims (20)

  1. 一种低温绝热模块气密性及内部气体流动性测试装置，包括进气/进液模块、排气/排液模块、绝热模块，所述进气/进液模块包括通过管道连接的内层空间液氮进液阀、外层空间液氮进液阀、低压压力控制模块、内层空间高压压力控制模块、外层空间高压压力控制模块、缓冲罐、减压阀、过滤器，所述排气/排液模块包括通过管道连接的液氮/氮气排放阀、内层空间排气阀、外层空间排气阀，所述内层空间液氮进液阀、所述低压压力控制模块、所述内层空间高压压力控制模块的出口并联并连接至绝热模块的内层空间的进口，所述外层空间高压压力控制模块、所述外层空间液氮进液阀的出口并联并连接至所述绝热模块的外层空间的进口；所述低压压力控制模块、所述内层空间高压压力控制模块、所述外层空间高压压力控制模块的进口并联连接，并依次连接所述缓冲罐、所述减压阀、所述过滤器后连接氮气流入接口；所述内层空间液氮进液阀、所述外层空间液氮进液阀的进口分别连接液氮流入接口，所述绝热模块的所述内层空间出口连接至所述内层空间排气阀的进口，所述绝热模块的所述外层空间出口连接至所述外层空间排气阀的进口，所述内层空间排气阀、所述外层空间排气阀的出口并联连接，并经所述液氮/氮气排放阀连接液氮/氮气排放接口。
  2. 如权利要求1所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述排气/排液模块还包括负压抽气阀，所述内层空间排气阀、所述外层空间排气阀的出口通过所述管道并联连接，并经所述负压抽气阀连接负压抽气接口。
  3. 如权利要求2所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述低压压力控制模块包括通过所述管道连接的低压压力控制器出气阀、低压压力控制器进气阀、低压压力控制器，所述低压压力控制器出气阀的出口作为所述低压压力控制模块的所述出口，所述低压压力控制器出气阀经所述低压压力控制器连接至所述低压压力控制器进气阀的出口，所述低压压力控制器进气阀的进口作为所述低压压力控制模块的所述进口。
  4. 如权利要求3所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述内层空间高压压力控制模块包括通过所述管道连接的内层空间高压压力控制器出气阀、内层空间高压压力控制器进气阀、内层空间高压压力控制器，所述内层空间高压压力控制器出气阀的出口作为所述内层空间高压压力控制模块的所述出口，所述内层空间高压压力控制器出气阀经所述内层空间高压压力控制器连接至所述内层空间高压压力控制器进气阀的出口，所述内层空间高压压力控制器进气阀的进口作为所述内层空间高压压力控制模块的所述进口。
  5. 如权利要求4所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述外层空间高压压力控制模块包括通过所述管道连接的外层空间高压压力控制器出 气阀、外层空间高压压力控制器进气阀、外层空间高压压力控制器，所述外层空间高压压力控制器出气阀的出口作为所述外层空间高压压力控制模块的所述出口，所述外层空间高压压力控制器出气阀经所述外层空间高压压力控制器连接至所述外层空间高压压力控制器进气阀的出口，所述外层空间高压压力控制器进气阀的进口作为所述外层空间高压压力控制模块的所述进口。
  6. 如权利要求1所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述内层空间液氮进液阀、所述低压压力控制模块、所述内层空间高压压力控制模块的出口并联，经第一管道、内层空间进口金属软管连接至所述绝热模块的所述内层空间的所述进口；所述外层空间高压压力控制模块、所述外层空间液氮进液阀的出口并联，经第二管道、外层空间进口金属软管连接至所述绝热模块的所述外层空间的所述进口。
  7. 如权利要求6所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述绝热模块的所述内层空间出口经第三管道、内层空间出口金属软管连接至所述内层空间排气阀的所述进口，所述绝热模块的所述外层空间出口经第四管道、外层空间出口金属软管连接至所述外层空间排气阀的所述进口。
  8. 如权利要求1所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述内层空间排气阀的所述出口连接至第五管道的一端，所述外层空间排气阀的出口连接至第六管道的一端，所述第五管道的另一端和所述第六管道的另一端并联连接。
  9. 如权利要求6所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述第一管道上设置有内层空间进口压力传感器和内层空间进口温度传感器；所述第二管道上设置有外层空间进口压力传感器和外层空间进口温度传感器。
  10. 如权利要求9所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述第一管道上还设置有内层空间进口安全阀，所述第二管道上还设置有外层空间进口安全阀。
  11. 如权利要求7所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述第三管道上设置有内层空间出口安全阀，所述第四管道上设置有外层空间出口安全阀。
  12. 如权利要求8所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述第五管道上设置有内层空间出口温度传感器、内层空间出口氧含量传感器、内层空间出口露点温度计，所述第六管道上设置有外层空间出口温度传感器、外层空间出口氧含量传感器、外层空间出口露点温度计。
  13. 如权利要求5所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述负压抽气阀、所述液氮/氮气排放阀、所述内层空间排气阀、所述外层空间排气阀、所述内层空间液氮进液阀、所述低压压力控制器出气阀、所述内层空间高压压力控制器出气阀、所述外层空间高压压力控制器出气阀、所述外层空间液氮进液阀为低温阀 门，工作温度为-196℃。
  14. 如权利要求5所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述内层空间排气阀、所述外层空间排气阀、所述内层空间液氮进液阀、所述低压压力控制器出气阀、所述内层空间高压压力控制器出气阀、所述外层空间高压压力控制器出气阀、所述外层空间液氮进液阀为气动阀。
  15. 如权利要求5所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述负压抽气阀、所述液氮/氮气排放阀、所述低压压力控制器进气阀、所述内层空间高压压力控制器进气阀、外层空间高压压力控制器进气阀为电磁阀。
  16. 如权利要求5所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述负压抽气阀、所述液氮/氮气排放阀、所述内层空间排气阀、所述外层空间排气阀、所述内层空间液氮进液阀、所述低压压力控制器出气阀、所述低压压力控制器进气阀、所述内层空间高压压力控制器出气阀、所述内层空间高压压力控制器进气阀、所述外层空间高压压力控制器出气阀、外层空间高压压力控制器进气阀、所述外层空间液氮进液阀与所述管道通过焊接固定。
  17. 如权利要求5所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述低压压力控制器、所述内层空间高压压力控制器、外层空间高压压力控制器与所述管道通过真空连接径向密封接口固定。
  18. 如权利要求12所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述内层空间出口氧含量传感器、所述内层空间出口露点温度计、所述外层空间出口氧含量传感器、所述外层空间出口露点温度计与所述管道通过真空连接径向密封接口固定。
  19. 如权利要求9所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述内层空间进口压力传感器、所述内层空间进口温度传感器、所述外层空间进口压力传感器和所述外层空间进口温度传感器与所述管道通过螺纹连接固定。
  20. 如权利要求7所述的低温绝热模块气密性及内部气体流动性测试装置，其中，所述内层空间进口金属软管、所述外层空间进口金属软管、内层空间出口金属软管、所述外层空间出口金属软管与所述绝热模块通过真空连接径向密封接口固定，所述内层空间进口金属软管、所述外层空间进口金属软管、内层空间出口金属软管、所述外层空间出口金属软管与所述第一管道、所述第二管道、所述第三管道、所述第四管道通过焊接固定。
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