CN113899520A - Carbon dioxide component control system and method for Mars wind tunnel - Google Patents

Carbon dioxide component control system and method for Mars wind tunnel Download PDF

Info

Publication number
CN113899520A
CN113899520A CN202111066769.XA CN202111066769A CN113899520A CN 113899520 A CN113899520 A CN 113899520A CN 202111066769 A CN202111066769 A CN 202111066769A CN 113899520 A CN113899520 A CN 113899520A
Authority
CN
China
Prior art keywords
carbon dioxide
mars
air
cabin
pilot valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111066769.XA
Other languages
Chinese (zh)
Other versions
CN113899520B (en
Inventor
周文
熊威
王云祥
秦望舒
王振果
刘海丰
张国友
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AVIC Aerodynamics Research Institute
Original Assignee
AVIC Aerodynamics Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AVIC Aerodynamics Research Institute filed Critical AVIC Aerodynamics Research Institute
Priority to CN202111066769.XA priority Critical patent/CN113899520B/en
Publication of CN113899520A publication Critical patent/CN113899520A/en
Application granted granted Critical
Publication of CN113899520B publication Critical patent/CN113899520B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • G01M9/02—Wind tunnels
    • G01M9/04—Details
    • 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
    • G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a carbon dioxide component control system of a Mars wind tunnel and a control method thereof, wherein the control system comprises CO2Concentration measurement system, CO2Gas source system, vacuum pumping system and absolute pressure sensor, CO2Concentration measurement system, vacuum pumping system and CO2The gas source system and the absolute pressure sensor are respectively communicated with the Mars cabin, and CO is2The air source system provides stable CO for the Mars wind tunnel2Power gas source, CO2The concentration measuring system comprises a carbon dioxide measuring flange, a gas return end, a sampling end pneumatic pilot valve, an air pump, a flowmeter and a carbon dioxide sensor. The control method detects the gas pressure in the Mars cabin through the absolute pressure sensor, further controls the working time sequence of the vacuum pumping system and the measuring system, can effectively realize that the concentration of carbon dioxide in the Mars cabin meets the test requirement during the test, and cannot be subjected to vacuum low-pressure, low-temperature and sand-dust testsInfluence. The invention has simple structure and convenient maintenance.

Description

Carbon dioxide component control system and method for Mars wind tunnel
Technical Field
The invention belongs to the technical field of simulation of a Mars test chamber, and particularly relates to a carbon dioxide component control system of a Mars wind tunnel and a control method thereof.
Background
The experimental chamber is used for simulating the pressure, gas composition, temperature and the like on the surface of a mars gauge. The atmosphere surrounding the spark is very thin, and the main component of the surrounding atmosphere is carbon dioxide (CO)2About 95.3% of the total), the atmosphere in the test chamber is generally maintained at an absolute pressure of up to 100Pa (about 0.1% of the standard atmospheric pressure), and the chamber is filled with CO necessary to simulate the Mars atmosphere during the test2Gas, CO2Gas concentrations of 97% are typically required to effectively simulate gas composition.
To make CO in the test process2The gas concentration of (A) is required, and CO is required to be used2Concentration sensor to measure CO2But low pressure, low temperature and dust will be on CO during the test2Concentration sensor with adverse effect, using conventional CO2Measurement sensor or measurement method, not only can not obtain accurate CO2Concentration value, even of CO2Failure of the concentration sensor probe characteristics, resulting in internal probe blockage and damage to CO2A concentration sensor.
Disclosure of Invention
Therefore, based on the defects, the invention provides the carbon dioxide component control system of the Mars wind tunnel, which can solve the problems of CO in the Mars wind tunnel under the low air pressure, low temperature and sand dust environment2The problem of component implementation.
In order to solve the technical problems, the invention adopts the technical scheme that: carbon dioxide of Mars wind tunnelComposition control system comprising CO2Concentration measurement system, CO2Gas source system, vacuum pumping system and absolute pressure sensor, wherein the CO is2Concentration measurement system, vacuum pumping system and CO2The gas source system and the absolute pressure sensor are respectively communicated with the Mars cabin, and the CO is2The air source system provides stable CO for the Mars wind tunnel in the Mars cabin2A power gas source; the CO is2The concentration measurement system comprises a carbon dioxide measurement flange, a sampling end pneumatic pilot valve, an air suction pump, a flowmeter, a carbon dioxide sensor and a return air end pneumatic pilot valve, wherein the carbon dioxide measurement flange is positioned on the outer wall of a mars cabin and is fixedly connected with the outer wall, a sampling air inlet pipe and a sampling return air pipe are arranged on the carbon dioxide measurement flange and are respectively communicated with the mars cabin, the sampling air inlet pipe is connected with the sampling end pneumatic pilot valve, the sampling end pneumatic pilot valve is connected with the air suction pump, the air suction pump is connected with the flowmeter, the flowmeter is connected with the carbon dioxide sensor, the carbon dioxide sensor is connected with the return air end pneumatic pilot valve, and the return air end pneumatic pilot valve is connected with the sampling return air pipe.
Further, the CO2 air source system comprises a carbon dioxide air inlet flange, a carbon dioxide air inlet pipeline and a carbon dioxide air source device, wherein the carbon dioxide air inlet flange is positioned on the outer wall of the Mars cabin and is fixedly connected with the Mars cabin, one end of the carbon dioxide air inlet pipeline is communicated with an ejector of the Mars wind tunnel through the carbon dioxide air inlet flange, and the other end of the carbon dioxide air inlet pipeline is communicated with the carbon dioxide air source device.
Furthermore, vacuum pumping system includes the flange of bleeding, vacuum pumping pipeline and evacuating device, the flange of bleeding be located the outer wall in mars cabin and rather than fixed connection, the flange of bleeding is passed through to the one end of vacuum pumping pipeline and is linked together in mars cabin, the other one end and the evacuating device intercommunication of vacuum pumping pipeline.
The invention also aims to provide a carbon dioxide component control method of a Mars wind tunnel through the carbon dioxide component control system, which comprises the following steps:
first step, CO is turned off2Concentration measurement system and CO2Air source systemStarting a vacuum pumping system, monitoring an absolute pressure sensor in a Mars cabin, and pumping to vacuum;
second, the vacuum-pumping system is closed, and CO is turned on2Gas source system for supplying gaseous CO2Injecting into Mars cabin, monitoring absolute pressure sensor, and closing CO when pressure in the cabin reaches standard atmospheric pressure2An air supply system;
third step, opening CO2Concentration measurement system: firstly opening a sampling end pneumatic pilot valve and a gas return end pneumatic pilot valve, then starting an air pump, and measuring the stable CO by a carbon dioxide sensor2Concentration value of (A), CO2After the concentration measurement is finished, the air pump is firstly closed, then the sampling end pneumatic pilot valve and the air return end pneumatic pilot valve are closed, and CO is finished2The concentration of (2);
step four, if CO2Repeating the first to third steps if the concentration of (C) does not meet the test requirement;
step five, CO meeting the test requirements2After the concentration, a vacuumizing system is started, an absolute pressure sensor on the Mars cabin is monitored, and the absolute pressure required by the test is pumped.
The invention has the advantages that: the method for realizing the carbon dioxide component in the invention is simple, and the CO used by the method2The concentration sensor is a conventional sensor, does not need special protection, and detects the gas pressure in the Mars cabin through an absolute pressure sensor so as to control the vacuum-pumping system and CO2The working time sequence of the concentration measurement system can effectively meet the test requirement of the concentration of carbon dioxide in the Mars cabin during the test and can not be influenced by vacuum low-pressure, low-temperature and sand dust tests. In addition, a sampling measurement air pipe and an air return pipe are arranged, so that the problem of emission of carbon dioxide is avoided, and the stability during measurement is further improved. The invention has simple structure, convenient maintenance and obvious effect and is suitable for popularization and use.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and the drawings in the following description are only some embodiments of the present invention, and other corresponding examples can be actually evolved.
FIG. 1 is a schematic block diagram of a carbon dioxide composition control system for a Mars wind tunnel.
In the figure: 1. the Mars cabin, 2, the Mars wind tunnel, 3, carbon dioxide measure the flange, 4, the sampling intake pipe, 5, the pneumatic pilot valve of sampling end, 6, the aspiration pump, 7, the flowmeter, 8, the carbon dioxide sensor, 9, the pneumatic pilot valve of return air end, 10, the flange of bleeding, 11, vacuum air bleed pipeline, 12, evacuating device, 13, the carbon dioxide air intake flange, 14, the carbon dioxide air supply unit, 15, the carbon dioxide air intake pipeline, 16, the ejector, 17, the absolute pressure sensor, 18, the sampling return air pipe.
Detailed Description
The invention is explained in detail below with reference to the drawings and examples. So that the advantages and features of the invention may be more readily understood by those skilled in the art, and the scope of the invention may be more clearly and clearly defined. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to FIG. 1, a carbon dioxide composition control system for a Mars wind tunnel includes CO2Concentration measurement system, CO2Air supply system, vacuum pumping system and absolute pressure sensor, its characterized in that: said CO2Concentration measurement system, vacuum pumping system and CO2The gas source system and the absolute pressure sensor are respectively communicated with the Mars cabin, and the CO is2The air source system provides stable CO for the Mars wind tunnel in the Mars cabin2A power gas source;
the CO is2The concentration measurement system comprises a carbon dioxide measurement flange 3, a sampling end pneumatic pilot valve 5, an air pump 6, a flowmeter 7, a carbon dioxide sensor 8 and a gas return end pneumatic pilot valve 9, wherein the carbon dioxide measurement flange is positioned on the outer wall of the Mars cabin and fixedly connected with the outer wall, a sampling air inlet pipe 4 and a sampling gas return pipe 18 are arranged on the carbon dioxide measurement flange 3 and are respectively communicated with the inside of the Mars cabin 1, and the sampling air inlet pipe 4 and the sampling end gasThe pneumatic pilot valve 5 is connected, and sampling end pneumatic pilot valve 5 is connected with aspiration pump 6, and aspiration pump 6 is connected with flowmeter 7, and flowmeter 7 is connected with carbon dioxide sensor 8, and carbon dioxide sensor 8 is connected with return-air end pneumatic pilot valve 9, and return-air end pneumatic pilot valve 9 is connected with sampling muffler 18. When in measurement, the sampling end pneumatic pilot valve 5 and the air return end pneumatic pilot valve 9 are opened, the gas in the Mars cabin 1 is pumped out through the air pump 6, the flow meter 7 on the measuring gas pipe 4 can detect the gas flow, and the carbon dioxide sensor 8 can measure the CO after sampling2The gas concentration.
The CO2 air source system comprises a carbon dioxide air inlet flange 13, a carbon dioxide air inlet pipeline 15 and a carbon dioxide air source 14 device, wherein the carbon dioxide air inlet flange 13 is positioned on the outer wall of the Mars cabin 1 and is fixedly connected with the outer wall, one end of the carbon dioxide air inlet pipeline 15 is communicated with an ejector 16 of a Mars wind tunnel through the carbon dioxide air inlet flange 13, the other end of the carbon dioxide air inlet pipeline 15 is communicated with the carbon dioxide air source device 14, and gaseous CO is obtained2Injected into the Mars wind tunnel 2, not only can inject pure CO into the Mars cabin 12And the gas can also provide a stable power gas source for the Mars wind tunnel 2 during the test.
The carbon dioxide component control method of the Mars wind tunnel is provided by the carbon dioxide component control system, and comprises the following steps:
first step, CO is turned off2The concentration measuring system (namely closing the sampling end pneumatic pilot valve 5, the air pump 6 and the air return end pneumatic pilot valve 9) closes the CO2And the air source system starts the vacuumizing system, monitors the absolute pressure sensor 17 on the Mars cabin, and the lowest absolute pressure which can be reached by vacuumizing the Mars cabin in the embodiment is 100 Pa.
Second, the vacuum-pumping system is closed, and CO is turned on2Gas source system for supplying gaseous CO2Injecting into Mars cabin 1, monitoring absolute pressure sensor 17, and closing CO when pressure in the cabin reaches standard atmospheric pressure2And (3) an air source system.
Third step, opening CO2The concentration measuring system, namely, the sampling end pneumatic pilot valve 5 and the air return end pneumatic pilot valve 9 are firstly opened, the air pump 6 is then started, and carbon dioxide is used for sensingCO measurement by means of a device 82Concentration value of (2), concentration value (usually, value of stable data in continuous 5 s) of measured data, CO2After the concentration measurement is finished, the air pump 6 is firstly closed, then the sampling end pneumatic pilot valve 5 and the air return end pneumatic pilot valve 9 are closed, and CO is finished2The concentration of (2).
Step four, if CO2Does not meet the requirements of the test (usually 97%), and the first to third steps are repeated.
Step five, CO meeting the test requirements2After the concentration, the vacuum pumping system is started, the absolute pressure sensor 17 on the Mars cabin 1 is monitored, and the absolute pressure required by the test is pumped.
Example 2
The pressure of the Mars cabin during the test is set to be 500Pa, and CO is set2The concentration of (A) is not less than 97%. After the door of the Mars cabin 1 is closed, the sampling end pneumatic pilot valve 5 and the air return end pneumatic pilot valve 9 are closed, and the CO is closed2And the air source system starts the vacuum pumping system until the absolute pressure sensor 17 on the Mars cabin is detected to be 100Pa (the lowest pressure value which can be reached by the Mars cabin in the embodiment), and closes the valve on the vacuum pumping pipeline 11. Opening of CO2Gas source system for supplying gaseous CO2Injecting into the Mars cabin 1 until the absolute pressure sensor 17 is monitored at 100kPa (about normal atmospheric pressure), and turning off the CO2Gas source system and CO is turned on2A sampling end pneumatic pilot valve 5 and a return end pneumatic pilot valve 9 of the measuring system are started, the air pump 6 is started again, and the carbon dioxide sensor 8 is used for measuring CO2When the values of (2) are stable, the measurement is continued for 5s and the average value (in this case, the concentration of carbon dioxide is about 90% to 92%) is calculated. The above procedure was repeated for a second time with CO measurements at Mars chamber pressure of 100kPa2Concentration value of 98%, CO satisfying test2The concentration requirement. And finally, starting a vacuum-pumping system, simulating the pressure in the Mars cabin until the absolute pressure is 500Pa, wherein the pressure required for completing the test is 500Pa and CO2The concentration of (A) is not less than 97%.
In conclusion, the implementation method and the control system for the carbon dioxide component of the Mars wind tunnel have the advantages of simple principle, simple and flexible structure, low cost and convenient maintenance, are successfully used for the wind tunnel device of the Mars dust cabin, and have strong popularization.

Claims (4)

1. A carbon dioxide composition control system for a Mars wind tunnel comprises CO2Concentration measurement system, CO2Air supply system, vacuum pumping system and absolute pressure sensor, its characterized in that: said CO2Concentration measurement system, vacuum pumping system and CO2The gas source system and the absolute pressure sensor are respectively communicated with the Mars cabin, and the CO is2The air source system provides stable CO for the Mars wind tunnel in the Mars cabin2A power gas source;
the CO is2The concentration measurement system comprises a carbon dioxide measurement flange, a sampling end pneumatic pilot valve, an air suction pump, a flowmeter, a carbon dioxide sensor and a return air end pneumatic pilot valve, wherein the carbon dioxide measurement flange is positioned on the outer wall of a mars cabin and is fixedly connected with the outer wall, a sampling air inlet pipe and a sampling return air pipe are arranged on the carbon dioxide measurement flange and are respectively communicated with the inside of the mars cabin, the sampling air inlet pipe is connected with the sampling end pneumatic pilot valve, the sampling end pneumatic pilot valve is connected with the air suction pump, the air suction pump is connected with the flowmeter, the flowmeter is connected with the carbon dioxide sensor, the carbon dioxide sensor is connected with the return air end pneumatic pilot valve, and the return air end pneumatic pilot valve is connected with the sampling return air pipe.
2. The system for controlling carbon dioxide composition in a Mars wind tunnel according to claim 1, wherein: the CO2 air source system comprises a carbon dioxide air inlet flange, a carbon dioxide air inlet pipeline and a carbon dioxide air source device, wherein the carbon dioxide air inlet flange is positioned on the outer wall of the Mars cabin and is fixedly connected with the Mars cabin, one end of the carbon dioxide air inlet pipeline is communicated with an ejector of the Mars wind tunnel through the carbon dioxide air inlet flange, and the other end of the carbon dioxide air inlet pipeline is communicated with the carbon dioxide air source device.
3. The system for controlling carbon dioxide composition in a Mars wind tunnel according to claim 1, wherein: the vacuumizing system comprises an air exhaust flange, a vacuum air exhaust pipeline and a vacuumizing device, the air exhaust flange is located on the outer wall of the Mars cabin and is fixedly connected with the Mars cabin, one end of the vacuum air exhaust pipeline is communicated with the Mars cabin through the air exhaust flange, and the other end of the vacuum air exhaust pipeline is communicated with the vacuumizing device.
4. A method for controlling carbon dioxide components in a Mars wind tunnel obtained by a carbon dioxide components control system of a Mars wind tunnel according to any one of claims 1 to 3, characterized by comprising the following steps:
first step, CO is turned off2Concentration measurement system and CO2The air source system is used for starting the vacuumizing system, monitoring an absolute pressure sensor in the Mars cabin and vacuumizing;
second, the vacuum-pumping system is closed, and CO is turned on2Gas source system for supplying gaseous CO2Injecting into Mars cabin, monitoring absolute pressure sensor, and closing CO when pressure in the cabin reaches standard atmospheric pressure2An air supply system;
third step, opening CO2Concentration measurement system: firstly opening a sampling end pneumatic pilot valve and a gas return end pneumatic pilot valve, then starting an air pump, and measuring the stable CO by a carbon dioxide sensor2Concentration value of (A), CO2After the concentration measurement is finished, the air pump is firstly closed, then the sampling end pneumatic pilot valve and the air return end pneumatic pilot valve are closed, and CO is finished2The concentration of (2);
step four, if CO2Repeating the first to third steps if the concentration of (C) does not meet the test requirement;
step five, CO meeting the test requirements2After the concentration, a vacuumizing system is started, an absolute pressure sensor on the Mars cabin is monitored, and the absolute pressure required by the test is pumped.
CN202111066769.XA 2021-09-13 2021-09-13 Carbon dioxide component control system of Mars wind tunnel and control method thereof Active CN113899520B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111066769.XA CN113899520B (en) 2021-09-13 2021-09-13 Carbon dioxide component control system of Mars wind tunnel and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111066769.XA CN113899520B (en) 2021-09-13 2021-09-13 Carbon dioxide component control system of Mars wind tunnel and control method thereof

Publications (2)

Publication Number Publication Date
CN113899520A true CN113899520A (en) 2022-01-07
CN113899520B CN113899520B (en) 2023-04-07

Family

ID=79027808

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111066769.XA Active CN113899520B (en) 2021-09-13 2021-09-13 Carbon dioxide component control system of Mars wind tunnel and control method thereof

Country Status (1)

Country Link
CN (1) CN113899520B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002104811A (en) * 2000-06-30 2002-04-10 Mitsubishi Heavy Ind Ltd Reduction apparatus of carbon dioxide
US7414726B1 (en) * 2007-10-31 2008-08-19 Bambeck Robert J Gas analyzer systems and methods
CN208921617U (en) * 2018-07-11 2019-05-31 中国海洋大学 It is molten in a kind of water based on TDLAS to deposit CO2Portable detection device
CN111579193A (en) * 2020-04-20 2020-08-25 哈尔滨工业大学 Mars dust storm environment simulation device
CN111579261A (en) * 2020-04-22 2020-08-25 中国科学院西安光学精密机械研究所 Mars surface gas composition simulation device and method
US20210146300A1 (en) * 2019-11-14 2021-05-20 Zayed University System for carbon sequestration, stabilization of active alkaline solid waste, and a phenomenological approach to calculate carbonation effectiveness

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002104811A (en) * 2000-06-30 2002-04-10 Mitsubishi Heavy Ind Ltd Reduction apparatus of carbon dioxide
US7414726B1 (en) * 2007-10-31 2008-08-19 Bambeck Robert J Gas analyzer systems and methods
CN208921617U (en) * 2018-07-11 2019-05-31 中国海洋大学 It is molten in a kind of water based on TDLAS to deposit CO2Portable detection device
US20210146300A1 (en) * 2019-11-14 2021-05-20 Zayed University System for carbon sequestration, stabilization of active alkaline solid waste, and a phenomenological approach to calculate carbonation effectiveness
CN111579193A (en) * 2020-04-20 2020-08-25 哈尔滨工业大学 Mars dust storm environment simulation device
CN111579261A (en) * 2020-04-22 2020-08-25 中国科学院西安光学精密机械研究所 Mars surface gas composition simulation device and method

Also Published As

Publication number Publication date
CN113899520B (en) 2023-04-07

Similar Documents

Publication Publication Date Title
CN107340101B (en) Gas micro-leakage detection device and method for sealing device
CN101592547A (en) The method of anesthesia machine system Leak Detection
CN105675224B (en) The detection method of encapsulating package sealing propertytest system
CN103759904B (en) System for detecting sealing performance
CN109029619B (en) Volume measuring device based on dynamic differential pressure attenuation
CN108871695B (en) Leakage detection device used before lithium battery liquid injection
US11583822B2 (en) Intermediate gas concentration-regulating piston pressure device for high-temperature autoclave and gas distribution method
CN108758325B (en) Vacuumizing degassing process
CN113899520B (en) Carbon dioxide component control system of Mars wind tunnel and control method thereof
CN207163679U (en) A kind of air-tightness detection device for clutch master cylinder
CN219348095U (en) Helium mass spectrum leak hunting device
CN103048100A (en) Full-automatic detection equipment for valve tightness of automobile engine cylinder head
CN106500977B (en) Turbocharger detection test method
CN115452257A (en) Method for evaluating actual running mileage life of side window of railway vehicle
CN114062225A (en) Low-permeability coal seam acidification permeability-increasing loaded coal body gas seepage multi-field coupling experiment system and experiment method
CN206847871U (en) A kind of device for the leak detection of high-pressure oil pipe high pressure
CN220437687U (en) Equipment for detecting air tightness
CN107741449B (en) testing device for martensite volume fraction in austenitic stainless steel
CN111458425A (en) VOC gas component analysis experimental device in oil tank of oil tanker and use method thereof
CN106124134A (en) Optical window assembly device for detecting leak rate and detection method
CN110243444A (en) Negative pressure source device, detecting gas meter air-channel system and calibration method
CN114459767B (en) Rocket engine low-temperature supply system characteristic simulation method
CN212621440U (en) High-temperature valve closed type detection test device based on gas heating system
CN219550283U (en) Gas pipeline leak hunting device
CN219736801U (en) Valve testing device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant