High-temperature anti-condensation water vapor rapid transmission system and method for vacuum test section

Abstract

The invention relates to the technical field of vacuum test equipment, in particular to a high-temperature anti-condensation water vapor rapid transmission system and method for a vacuum test section. The system comprises a water vapor generator, a conveying pipeline and a vacuum test section, and the conveying pipeline is connected with an outlet of the water vapor generator and an inlet of the vacuum test section and used for conveying high-temperature water vapor converted by the water vapor generator to the vacuum test section; the outer side of the conveying pipeline is sleeved with an active heat preservation unit, and the active heat preservation unit is used for conducting heating and heat preservation on water vapor flowing through the interior of the conveying pipeline. The active heat preservation unit is electrically connected with the control system; an anti-vibration assembly is arranged on the conveying pipeline and used for isolating and attenuating external mechanical vibration. An efficient heat preservation structure is adopted, energy loss in the conveying process can be remarkably reduced, and it is ensured that water vapor is kept at the stable temperature in the conveying process; and the reliability of the system is further improved through the anti-vibration design.

Description

Technical Field

[0001] This invention relates to the field of vacuum testing equipment technology, and in particular to a high-temperature anti-condensation water vapor rapid transmission system and method for vacuum testing sections. Background Technology

[0002] In vacuum testing in aerospace, materials science, and energy engineering, rapid transport of high-temperature steam is crucial. For example, wind tunnel tests require simulating high heat flux environments, high-temperature performance testing of materials necessitates precise control of steam temperature and pressure, and thermodynamic experiments in a vacuum environment depend on the stability of the steam. However, traditional steam transport systems face multiple challenges in vacuum test sections: First, the extremely low pressure in a vacuum environment (typically less than 100 Pa) significantly reduces the critical condensation temperature of steam. If temperature control is insufficient during transport, steam can easily condense into liquid within the pipes, causing heat loss, pipe blockage, and even equipment corrosion. Second, the rapid start-up of high-temperature steam (e.g., reaching pressures above 0.2 MPa within less than 1 second) places extremely high demands on the system's response speed and heat retention capacity. Existing steam transport systems often employ static insulation layers or intermittent heating devices, which are ill-suited to handle dynamic heat load changes in vacuum test sections. Finally, mechanical vibrations between the steam generator and the test section (such as equipment start-up impacts and external environmental interference) can easily be transmitted through rigid pipes, causing pipe stress concentration, sealing failure, or test data distortion. The main pipeline is prone to local deformation because the thermal expansion stress is not absorbed.

[0003] The aforementioned problems severely restrict the accuracy and efficiency of vacuum testing, and there is an urgent need for a steam transfer system that combines rapid response, anti-condensation, and vibration resistance. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems and provide a high-temperature anti-condensation water vapor rapid transmission system for vacuum test sections, which provides higher precision and more stable support for vacuum tests.

[0005] This specification provides one or more embodiments of a high-temperature anti-condensing water vapor rapid transmission system for a vacuum test section, including a water vapor generator, a conveying pipeline and a vacuum test section, wherein a spacecraft model is provided inside the vacuum test section; The delivery pipeline includes a first delivery pipeline and a second delivery pipeline connected in sequence. The first delivery pipeline is connected at both ends to the outlet of the steam generator and the inlet of the vacuum test section, and is used to deliver the high-temperature steam converted by the steam generator to the vacuum test section. The second delivery pipeline is connected to the jet inlet of the aircraft model and is used to deliver the high-temperature steam to the aircraft model. Each of the conveying pipes is fitted with an active insulation unit, which is used to heat and keep the water vapor flowing inside the conveying pipes warm; the active insulation unit is electrically connected to the control system. The second conveying pipeline is equipped with anti-vibration components to isolate and attenuate external mechanical vibrations.

[0006] Preferably, the vibration-resistant component includes several pipe supports, which connect the outer wall of the conveying pipe to the external foundation.

[0007] Preferably, the pipe support is an elastic hanger or a damping support.

[0008] Preferably, a high-temperature resistant silicone layer or rubber layer is provided between the pipe support and the outer wall of the conveying pipe.

[0009] Preferably, the vibration-damping component includes a plurality of flexible connecting pipes connected in series in the conveying pipeline.

[0010] Preferably, the conveying pipe is provided with at least one U-shaped or Ω-shaped expansion bend, and the active heat preservation unit is provided on the outside of the expansion bend.

[0011] Preferably, the active heat preservation unit is a heating sleeve fitted onto the outer wall of the conveying pipeline, and the heating sleeve adopts a flexible electric heating film.

[0012] Preferably, a vibration isolation base is fixedly connected to the bottom of the steam generator, and the vibration isolation base is made of damping material.

[0013] Preferably, the conveying pipeline is equipped with several sets of temperature and pressure monitoring components for monitoring steam temperature and pressure, and the temperature and pressure monitoring components are electrically connected to the control system.

[0014] This invention also provides a method for rapid high-temperature anti-condensation water vapor transport in a vacuum test section, comprising the following steps according to the above system: S1. Start the steam generator, which generates high-temperature steam after receiving a trigger signal; S2. The first conveying pipe delivers high-temperature water vapor to the vacuum test section; the second conveying pipe delivers high-temperature water vapor to the aircraft model, and the aircraft model ejects water vapor; During the conveying process, the active heat preservation unit heats and preserves the steam in the conveying pipeline to maintain the steam temperature above the critical condensation temperature; the vibration-resistant component isolates and attenuates external mechanical vibrations. S3. Monitor the steam temperature and pressure in the conveying pipeline in real time. If the temperature is detected to be lower than the set threshold, the control system sends a signal to adjust the heating power of the active heat preservation unit. If the pressure fluctuation is detected to exceed the preset range, the control system sends a prompt signal.

[0015] The embodiments of this invention enable rapid transport of high-temperature water vapor under vacuum conditions. The use of a highly efficient insulation structure significantly reduces energy loss during transport, ensuring the water vapor maintains a stable temperature and avoiding experimental errors or equipment damage caused by condensation. Furthermore, the vibration-resistant design further enhances system reliability, effectively isolating and attenuating mechanical vibrations, while expansion bends absorb thermal expansion and vibration stress.

[0016] This invention not only improves transmission efficiency but also significantly reduces energy loss and equipment failure rate, providing higher precision and more stable support for vacuum testing. It also enhances the stability and durability of the system, especially in high temperature, high pressure and complex vibration environments, ensuring the long-term reliable operation of the transmission pipeline and reducing equipment failure or maintenance costs caused by vibration.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of a high-temperature anti-condensation water vapor rapid transmission system for a vacuum test section, provided for one or more embodiments of this specification; Figure 2 This is a schematic flowchart illustrating a method for rapid transmission of high-temperature anti-condensation water vapor in a vacuum test section, provided for one or more embodiments of this specification.

[0020] Explanation of reference numerals in the attached figures: 1-Steam generator, 2-Vibration isolation base, 3-Conveying pipe, 301-First conveying pipe, 302-Second conveying pipe, 4-Flexible connecting pipe, 5-Elastic hanger, 6-Expansion bend, 7-Active insulation unit, 8-Flange, 9-Vacuum test section, 10-Temperature and pressure monitoring components, 1001-Temperature sensor, 1002-Pressure sensor, 11-Aircraft model. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0022] System Implementation Examples According to embodiments of the present invention, a high-temperature anti-condensation water vapor rapid transport system for a vacuum test section is provided. Figure 1 This is a structural schematic diagram of an embodiment of the present invention, as shown below. Figure 1 As shown, the system specifically includes a steam generator 1, a delivery pipeline 3, and a vacuum test section 9, within which a flight model 11 is installed. The steam generator 1 can receive a trigger signal and start within less than one second, generating high-temperature steam with a pressure greater than 0.2 MPa. This significantly improves the system's response speed and transmission efficiency, especially in scenarios requiring rapid vacuum testing, greatly shortening test preparation time. The steam generator 1 can rapidly generate high-temperature steam using methods such as electric heating or combustion, adapting to the needs of different testing scenarios.

[0023] A vibration isolation base 2 is fixedly connected to the bottom of the steam generator 1. The vibration isolation base 2 is made of damping material and is used to isolate and attenuate mechanical vibrations from the steam generator 1 and the external environment. Vibration isolators can be installed in the vibration isolation base 2, arranged symmetrically. The vibration isolation base 2 can prevent the vibration of the steam generator 1 during operation from being transmitted to the delivery pipe 3 and the vacuum test section 9, preventing the failure of the seal at the pipe connection or damage to the precision components of the test section.

[0024] Active insulation units 7 are installed on the outer side of the conveying pipe 3. These units heat and insulate the water vapor flowing inside the pipe 3, effectively preventing condensation during transport. The water vapor generator 1 and the active insulation unit 7 are electrically connected to a control system, which can be a PLC controller. The active insulation unit 7 is a heating sleeve fitted onto the outer wall of the conveying pipe 3, and the sleeve uses a flexible electric heating film. The flexible electric heating film is tightly attached to the outer wall of the conveying pipe 3 with a high-temperature resistant adhesive and deforms along with the pipe 3 to resist vibration and ensure uniform heating.

[0025] The conveying pipeline 3 includes a first conveying pipeline 301 and a second conveying pipeline 302 connected in sequence. The first conveying pipeline 301 is connected at both ends to the outlet of the steam generator 1 and the inlet of the vacuum test section 9, and is used to convey the high-temperature steam converted by the steam generator 1 to the vacuum test section 9. During the high-temperature steam conveying process, efficient heat preservation and anti-condensation, vibration isolation and thermal stress compensation are achieved to ensure stable steam parameters and safe and reliable conveying process. The first conveying pipeline 301 and the inlet of the vacuum test section 9 are connected by flanges 8, and metal spiral wound gaskets are installed between the flanges 8 to ensure its sealing.

[0026] The second delivery pipe 302 connects to the jet inlet of the aircraft model 11 and is used to deliver high-temperature water vapor to the aircraft model 11. The second delivery pipe 302 is equipped with vibration-damping components to isolate and attenuate external mechanical vibrations. The first delivery pipe 301 can also be equipped with vibration-damping components as needed. The vibration-damping components include several pipe supports that connect the delivery pipe 3 to the external foundation.

[0027] The pipe supports utilize elastic hangers 5 or damping support seats. These supports connect the conveying pipe 3 to the external foundation, dissipating vibration energy while simultaneously securing the conveying pipe 3. Corresponding pipe supports on the first conveying pipe 301 connect the outer wall of the first conveying pipe 301 to the external foundation, while pipe supports on the second conveying pipe 302 connect the outer wall of the second conveying pipe 302 to the inner wall of the vacuum test section 9, thus securing the second conveying pipe 302 and effectively dissipating vibrations generated in the vacuum test section 9 during the experiment.

[0028] The flexible hanger 5 is a commonly used pipe fixing structure, and its structure will not be described in detail here. A high-temperature resistant silicone or rubber layer is provided between the pipe support and the outer wall of the conveying pipe 3, which can further dampen vibration and avoid wear caused by direct friction between the pipe support and the conveying pipe 3.

[0029] The vibration-damping assembly also includes several flexible connecting pipes 4, which are connected in series in the conveying pipeline 3. The flexible connecting pipes 4 can be made of metal corrugated pipes, which can absorb vibration and compensate for thermal displacement; The conveying pipeline 3 is equipped with at least one U-shaped or Ω-shaped expansion bend 6 to absorb the stress generated by thermal expansion and vibration in the conveying pipeline 3. An active heat preservation unit 7 is provided on the outside of the expansion bend 6. The flexible electric heating film of deformable parts such as the expansion bend 6 and the flexible connecting pipe 4 adopts a segmented design and reserves expansion and contraction allowance to avoid pulling the flexible electric heating film when the pipeline deforms.

[0030] The minimum pressure in vacuum test section 9 is less than 100 Pa to meet the testing requirements under vacuum conditions. Several sets of temperature and pressure monitoring components 10 are installed on the conveying pipeline 3. Each set includes a temperature sensor 1001 and a pressure sensor 1002 for monitoring steam temperature and pressure. The temperature sensor 1001 and pressure sensor 1002 are electrically connected to the control system. The temperature sensor 1001 and pressure sensor 1002, in conjunction with the control system, can monitor steam temperature, pressure, and other parameters in real time, and automatically activate the heating power adjustment or enhanced damping mechanism of the active insulation unit 7 when an abnormality is detected. Preferably, at least three sets of temperature and pressure monitoring components 10 are installed, respectively near the inlet of vacuum test section 9, in the middle section of the second conveying pipeline 302, and near the inlet of the aircraft model 11, to monitor the steam state throughout the conveying process, facilitating the analysis of the conveying effect. This function further improves the system's intelligence and safety compared to existing technologies, ensuring that the steam state in the conveying pipeline 3 is always within the optimal range, while also extending the service life of the equipment.

[0031] Method Implementation Examples A method for rapid high-temperature anti-condensation water vapor transport in vacuum test section 9, based on the above-mentioned system, such as Figure 2 As shown, it includes the following steps: S1. Start steam generator 1. After receiving the trigger signal, steam generator 1 generates high-temperature steam. After receiving the trigger signal, steam generator 1 generates high-temperature steam with a pressure greater than 0.2 MPa within less than 1 second; S2. The first conveying pipe 301 conveys high-temperature water vapor to the vacuum test section 9; the second conveying pipe 302 conveys high-temperature water vapor to the aircraft model 11, and the aircraft model 11 sprays water vapor during the experiment; During the transportation process, the active heat preservation unit 7 heats and preserves the steam in the transportation pipeline 3 to maintain the steam temperature above the critical condensation temperature; the anti-vibration component isolates and attenuates external mechanical vibrations; S3. Temperature and pressure monitoring component 10 monitors the steam temperature and pressure in the conveying pipeline 3 in real time. If the temperature is detected to be lower than the set threshold, the control system sends a signal to adjust the heating power of the active heat preservation unit 7. If the pressure fluctuation is detected to exceed the preset range, the control system sends a prompt signal to trigger the damping enhancement mechanism of the anti-vibration component and the vibration isolation base 2. When the system is shut down, steam venting and pipeline cooling procedures are executed, while the active insulation unit 7 and vibration-resistant components are checked and maintained.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-temperature anti-condensation water vapor rapid transmission system for a vacuum test section, characterized in that, It includes a steam generator, a delivery pipeline, and a vacuum test section, wherein the vacuum test section contains a model of an aircraft; The delivery pipeline includes a first delivery pipeline and a second delivery pipeline connected in sequence. The first delivery pipeline is connected at both ends to the outlet of the steam generator and the inlet of the vacuum test section, and is used to deliver the high-temperature steam converted by the steam generator to the vacuum test section. The second delivery pipeline is connected to the jet inlet of the aircraft model and is used to deliver the high-temperature steam to the aircraft model. Each of the conveying pipes is fitted with an active insulation unit, which is used to heat and keep the water vapor flowing inside the conveying pipes warm; the active insulation unit is electrically connected to the control system. The conveying pipeline is equipped with vibration-damping components to isolate and attenuate external mechanical vibrations.

2. The high-temperature anti-condensation water vapor rapid transmission system for a vacuum test section according to claim 1, characterized in that, The vibration-resistant component includes several pipe supports, which connect the outer wall of the conveying pipe to the external foundation.

3. The high-temperature anti-condensation water vapor rapid transmission system for vacuum test sections according to claim 2, characterized in that, The pipe support is provided by an elastic hanger or a damping support.

4. The high-temperature anti-condensation water vapor rapid transmission system for a vacuum test section according to claim 2, characterized in that, A high-temperature resistant silicone or rubber layer is provided between the pipe support and the outer wall of the conveying pipe.

5. The high-temperature anti-condensation water vapor rapid transmission system for a vacuum test section according to claim 1, characterized in that, The vibration-damping component includes several flexible connecting pipes connected in series in the conveying pipeline.

6. The high-temperature anti-condensation water vapor rapid transmission system for a vacuum test section according to claim 1, characterized in that, The conveying pipeline is provided with at least one U-shaped or Ω-shaped expansion bend, and the active heat preservation unit is provided on the outside of the expansion bend.

7. The high-temperature anti-condensation water vapor rapid transmission system for a vacuum test section according to claim 1, characterized in that, The active heat preservation unit is a heating sleeve fitted on the outer wall of the conveying pipeline, and the heating sleeve adopts a flexible electric heating film.

8. The high-temperature anti-condensation water vapor rapid transmission system for a vacuum test section according to claim 1, characterized in that, The bottom of the steam generator is fixedly connected to a vibration isolation base, which is made of damping material.

9. The high-temperature anti-condensation water vapor rapid transmission system for a vacuum test section according to claim 1, characterized in that, The conveying pipeline is equipped with several sets of temperature and pressure monitoring components for monitoring steam temperature and pressure. The temperature and pressure monitoring components are electrically connected to the control system.

10. A method for rapid transport of high-temperature anti-condensation water vapor in a vacuum test section, characterized in that, The system according to any one of claims 1-9 includes the following steps: S1. Start the steam generator, which generates high-temperature steam after receiving a trigger signal; S2. The first conveying pipe delivers high-temperature water vapor to the vacuum test section; the second conveying pipe delivers high-temperature water vapor to the aircraft model, and the aircraft model ejects water vapor; During the conveying process, the active heat preservation unit heats and preserves the steam in the conveying pipeline to maintain the steam temperature above the critical condensation temperature; the vibration-resistant component isolates and attenuates external mechanical vibrations. S3. Monitor the steam temperature and pressure in the conveying pipeline in real time. If the temperature is detected to be lower than the set threshold, the control system sends a signal to adjust the heating power of the active heat preservation unit. If the pressure fluctuation is detected to exceed the preset range, the control system sends a prompt signal.

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