Space high-power microwave insulation improvement device and method based on N2 / SF6 mixed gas

Abstract

The present invention provides a device and method for improving the insulation performance of high-power microwaves in space using an N2 / SF6 mixed gas mixture. The device comprises an N2 gas cylinder, an SF6 gas cylinder, and two vacuum chambers. The gas cylinders and vacuum chambers are connected to the equipment to be protected via a gas path equipped with valves and pressure detection devices. A multi-stage pressure reduction device is also provided on the gas path between the gas cylinders and the equipment to be protected. This device utilizes the strong electronegativity of inert gases, making it reliable, safe, and easy to implement. Through specific valves and pressure reduction designs, it can provide multiple solutions for targeted and comprehensive improvements to the insulation performance of space microwave transmission devices, tailored to different space application scenarios, thereby enhancing the reliability and safety of space equipment.

Description

Technical Field

[0001] The present invention belongs to the field of space microwave transmission technology, relates to auxiliary equipment of space microwave transmission equipment, and specifically relates to a space high-power microwave insulation improvement device and method based on N2 / SF6 mixed gas. Background Art

[0002] With advances in space microwave transmission technology and its widespread application in related fields, the design and simulation of traditional microwave components, devices, and systems have also made significant progress, leading to an increasing demand for microwave device power. For microwave devices, as power levels continue to increase, poor insulation performance can lead to insufficient microwave link power capacity, further impacting device performance. Therefore, the design of insulation performance indicators for microwave transmission links (such as passive components like waveguides and isolators) has become a key focus. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a space high-power microwave insulation improvement device based on N2 / SF6 mixed gas to solve the technical problem in the existing technology that as the transmission power of space microwave equipment gradually increases, the microwave link power capacity of high-power space microwave equipment is insufficient due to the lack of good insulation protection devices.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A space high-power microwave insulation lifting device based on N2 / SF6 mixed gas comprises an N2 gas cylinder and an SF6 gas cylinder.

[0006] The gas outlet end of the N2 gas cylinder is connected to the gas inlet end of the N2 gas delivery pipeline, the first gas outlet end of the N2 gas delivery pipeline is connected to the gas inlet end of the main gas delivery pipeline, and the second gas outlet end of the N2 gas delivery pipeline is connected to the first vacuum chamber; the gas outlet end of the SF6 gas cylinder is connected to the gas inlet end of the SF6 gas delivery pipeline, the first gas outlet end of the SF6 gas delivery pipeline is connected to the gas inlet end of the main gas delivery pipeline, and the second gas outlet end of the SF6 gas delivery pipeline is connected to the second vacuum chamber; the gas outlet end of the main gas pipeline is connected to the gas inlet ends of the first branch gas pipeline and the second branch gas pipeline, and the gas outlet ends of the first branch gas pipeline and the second branch gas pipeline are connected to the equipment to be protected.

[0007] A multi-stage pressure reducing device is provided at the connection point of the main gas pipeline, the first branch gas pipeline and the second branch gas pipeline.

[0008] A first solenoid valve is provided on the gas outlet end of the N2 gas cylinder; a second solenoid valve and a third solenoid valve are provided on the N2 gas delivery pipeline.

[0009] A fourth solenoid valve is provided on the gas outlet end of the SF6 gas cylinder; a fifth solenoid valve and a sixth solenoid valve are provided on the SF6 gas delivery pipeline.

[0010] The spatial high-power microwave insulation improving device based on N2 / SF6 mixed gas also includes a first temperature control device, which is connected to the equipment to be protected; the first temperature control device is connected to the first branch gas pipeline.

[0011] The spatial high-power microwave insulation improving device based on N2 / SF6 mixed gas also includes a second temperature control device, which is connected to both the N2 gas cylinder and the SF6 gas cylinder.

[0012] The present invention also has the following technical features:

[0013] The N2 gas delivery pipeline is provided with an N2 pressure detection device; the second solenoid valve is located between the first vacuum chamber and the N2 pressure detection device; the third solenoid valve is located between the multi-stage pressure reducing device and the N2 pressure detection device.

[0014] The SF6 gas delivery pipeline is provided with an SF6 pressure detection device; the fifth solenoid valve is located between the second vacuum chamber and the SF6 pressure detection device; the sixth solenoid valve is located between the multi-stage pressure reducing device and the SF6 pressure detection device.

[0015] The second branch gas pipeline is provided with a terminal pressure detection device.

[0016] The spatial high-power microwave insulation improving device based on N2 / SF6 mixed gas also includes a titanium pump, which is connected to the gas outlet end of the equipment to be protected.

[0017] The spatial high-power microwave insulation improving device based on N2 / SF6 mixed gas also includes a vacuum monitoring device, which is connected to the equipment to be protected.

[0018] The equipment to be protected is provided with a first inflation interface and a second inflation interface. The first inflation interface is connected to the first branch gas pipeline, and the second inflation interface is connected to the second branch gas pipeline.

[0019] The present invention also protects a method for improving the insulation of a space high-power microwave based on an N2 / SF6 mixed gas. The method adopts the above-mentioned space high-power microwave insulation improving device based on an N2 / SF6 mixed gas. The method uses a mixed gas composed of N2 gas and SF6 gas to protect the equipment to be protected. In the mixed gas, the volume ratio of N2 gas to SF6 gas is (1:3) to (1:10).

[0020] Specifically, the method is used for sudden working conditions in which severe outgassing occurs due to temperature rise or ignition on the surface of a material of a low-orbit high-power space microwave transmission device, and includes the following steps:

[0021] Step 1: Open the second solenoid valve, the third solenoid valve, the fifth solenoid valve and the sixth solenoid valve, and the first temperature control device and the second temperature control device work. The temperature rises, causing the material to release the residual adsorbed gas on the surface, and the excess gas is discharged into the first vacuum chamber and the second vacuum chamber.

[0022] Step 2: Close the second solenoid valve and the fifth solenoid valve, and then open the first solenoid valve and the fourth solenoid valve. The N2 and SF6 gases in the N2 gas cylinder and the SF6 gas cylinder are released, and the N2 and SF6 gases flow to the main gas pipeline through the N2 gas transmission pipeline and the SF6 gas transmission pipeline respectively. When the N2 and SF6 mixed gas flows through the multi-stage pressure reducing device, the pressure drops to 0.3MPa.

[0023] Step three: Keep the N2 gas transmission pipeline, SF6 gas transmission pipeline, main gas transmission pipeline, first branch gas transmission pipeline and second branch gas transmission pipeline evenly filled with mixed insulating gas and the pressure unchanged until the equipment to be protected is completed.

[0024] Step 4: During the operation of the equipment to be protected and after the test, the pressure in the N2 gas transmission pipeline, SF6 gas transmission pipeline, main gas transmission pipeline, first branch gas transmission pipeline and second branch gas transmission pipeline needs to be maintained continuously. When the pressure of the N2 and SF6 mixed gas is insufficient, the gas needs to be replenished immediately.

[0025] Specifically, the method is used to deal with sudden operating conditions of high-orbit high-power space microwave transmission equipment without severe outgassing, and includes the following steps:

[0026] In step 1, the first temperature control device and the second temperature control device are operated, the temperature rises to cause the material to release the residual adsorbed gas on the surface, and the second solenoid valve, the third solenoid valve, the fifth solenoid valve and the sixth solenoid valve are opened to discharge the excess gas into the first vacuum chamber and the second vacuum chamber.

[0027] Step 2: Turn on the vacuum monitoring device and monitor the vacuum degree of the N2 gas pipeline, the main gas pipeline, the SF6 gas pipeline, the first branch gas pipeline and the second branch gas pipeline in real time to ensure that the vacuum degree is always less than or equal to 10 -8 Pa level until the equipment to be protected finishes working.

[0028] Step 3: When the vacuum degree is detected to be lower than the use requirement, vacuum is quickly evacuated until the vacuum degree is less than or equal to 1×10 -8 Pa.

[0029] Compared with the prior art, the present invention has the following technical effects:

[0030] (I) The present invention mainly uses sulfur hexafluoride mixed insulating gas. Since SF6 can effectively suppress electron multiplication, it has high insulation performance. At the same pressure and temperature, its insulation capacity is 2.5 to 3 times that of air, and its arc extinguishing capacity is 100 times that of air. Three atmospheres of pressure can be the same as insulating oil at normal pressure. By filling space microwave transmission devices (such as waveguides and isolators) with this gas, the power capacity of the microwave link of high-power space microwave transmission equipment can be effectively improved, thereby achieving the purpose of suppressing discharge and effectively ensuring the safety and reliability of the components of high-power space microwave transmission equipment. By mixing nitrogen, while ensuring insulation performance, the problem of sulfur hexafluoride liquefaction temperature can also be effectively improved, so that the device of the present invention can better adapt to the high and low temperature differences in the space environment.

[0031] (II) This invention addresses the sudden operating conditions of low-orbit, high-power space microwave transmission equipment (low vacuum) or high-power space microwave transmission equipment experiencing severe material outgassing. By opening the gas cylinder valve, the mixed gas can be rapidly released to improve the insulation performance of the protected equipment. For high-orbit, high-power space microwave transmission equipment operating in conditions without sudden outgassing (high vacuum), the gas cylinder valve can be closed and a valve connecting to the high vacuum environment of space can be opened, utilizing the inherent high vacuum of space to improve equipment reliability. This invention, through the aforementioned valve operation sequence design, can meet both low-orbit (low vacuum) and high-orbit (high vacuum) operating conditions, demonstrating high universality.

[0032] (III) The present invention utilizes the strong electronegativity of inert gases and is reliable, safe, and easy to implement. Through specific valves and pressure reduction designs, it can provide multiple solutions to specifically and comprehensively improve the insulation performance of space microwave transmission devices according to different space application scenarios, thereby improving the reliability and safety of space equipment.

[0033] (IV) The device of the present invention only needs to reserve a specific interface for the equipment to be protected, and does not require any modification to the system itself, so the impact can be reduced to a minimum. Therefore, the device has almost no impact on the original performance indicators of the microwave link of the high-power space microwave transmission equipment, and can also be applied to various types of equipment, with a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of a space high-power microwave insulation enhancement device based on N2 / SF6 mixed gas.

[0035] The meanings of the numbers in the figure are: 1-N2 gas cylinder, 2-SF6 gas cylinder, 3-N2 gas transmission pipeline, 4-main gas transmission pipeline, 5-first vacuum chamber, 6-SF6 gas transmission pipeline, 7-second vacuum chamber, 8-first branch gas transmission pipeline, 9-second branch gas transmission pipeline, 10-equipment to be protected, 11-multi-stage pressure reducing device, 12-N2 pressure detection device, 13-SF6 pressure detection device, 14-terminal pressure detection device, 15-first solenoid valve, 16-second solenoid valve, 17-third solenoid valve, 18-fourth solenoid valve, 19-fifth solenoid valve, 20-sixth solenoid valve, 21-titanium pump, 22-vacuum monitoring device, 23-first temperature control device, 24-second temperature control device, 25-first charging interface, 26-second charging interface.

[0036] The specific contents of the present invention are further explained in detail below with reference to the embodiments. DETAILED DESCRIPTION

[0037] It should be noted that all components used in the present invention are components known in the art unless otherwise specified. For example:

[0038] The multi-stage decompression device 11 adopts a conventional multi-stage decompression device known in the prior art.

[0039] The vacuum monitoring device 22 adopts a conventional vacuum monitoring device known in the prior art.

[0040] The first solenoid valve 15 , the second solenoid valve 16 , the third solenoid valve 17 , the fourth solenoid valve 18 , the fifth solenoid valve 19 and the sixth solenoid valve 20 are conventional three-way solenoid valves known in the prior art.

[0041] The first temperature control device 23 and the second temperature control device 24 are conventional temperature control devices known in the prior art.

[0042] The technical ideas of the present invention are as follows:

[0043] Space microwave transmission devices may be used in low-orbit environments with low vacuum levels and high-orbit environments with high vacuum levels. The lifting device designed in this invention uses a mixed gas cylinder as the main body. By utilizing the strong electronegativity of the mixed gas and through special designs of valves, pipelines, and remote control and telemetry, it greatly improves the insulation performance of on-orbit high-power microwave transmission link equipment, providing a new protection solution for microwave transmission equipment with growing power demands.

[0044] Specifically, a high-precision, multi-stage pressure-reducing device reduces the high-pressure, compressed sulfur hexafluoride gas to a normal operating pressure of 0.3 MPa. A three-way solenoid valve is installed at the front end of the pressure-reducing device. This valve, with a timed design, can meet the requirements of different space application scenarios and provide multiple switching options. For low-orbit equipment with low vacuum levels or severe outgassing of materials in high-power space microwave transmission equipment, the gas cylinder valve can be opened to quickly release the N2 / SF6 mixture to increase the insulation power capacity of the protected equipment. For high-orbit equipment with no outgassing, the gas cylinder valve can be closed and the valve connecting to the high vacuum environment in space can be opened. This utilizes the inherent high vacuum environment of space and the titanium pump treatment to enhance equipment reliability and comprehensively improve the insulation performance of the space microwave transmission equipment. The entire system maintains a connection to the space vacuum environment. Three pressure sensors monitor pressure at key locations. A temperature control system adjusts the system temperature to meet the ambient temperature requirements of space use. The titanium pump evacuates the internal space microwave transmission equipment.

[0045] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0046] Example 1:

[0047] This embodiment provides a space high-power microwave insulation improving device based on N2 / SF6 mixed gas, including an N2 gas cylinder 1 and an SF6 gas cylinder 2; the gas outlet end of the N2 gas cylinder 1 is connected to the gas inlet end of the N2 gas delivery pipeline 3, the first gas outlet end of the N2 gas delivery pipeline 3 is connected to the gas inlet end of the main gas delivery pipeline 4, and the second gas outlet end of the N2 gas delivery pipeline 3 is connected to the first vacuum chamber 5; the gas outlet end of the SF6 gas cylinder 2 is connected to the gas inlet end of the SF6 gas delivery pipeline 6, and the SF6 gas The first gas outlet end of the delivery pipeline 6 is connected to the gas inlet end of the main gas pipeline 4, and the second gas outlet end of the SF6 gas delivery pipeline 6 is connected to the second vacuum chamber 7; the gas outlet end of the main gas pipeline 4 is connected to the gas inlet ends of the first branch gas pipeline 8 and the second branch gas pipeline 9, and the gas outlet ends of the first branch gas pipeline 8 and the second branch gas pipeline 9 are connected to the equipment to be protected 10; a multi-stage pressure reducing device 11 is provided at the connecting point of the main gas pipeline 4, the first branch gas pipeline 8 and the second branch gas pipeline 9.

[0048] In this embodiment, the N2 gas cylinder 1 and the SF6 gas cylinder 2 are used to provide high-strength, electronegative insulating gas to improve power capacity. The SF6 insulating gas itself has a strong electronegativity. By being carried into the space environment through the gas cylinders, it can suppress the secondary electron multiplication process of the space high-power microwave transmission device, thereby effectively suppressing the occurrence of discharge and improving the reliability and safety of the equipment. The configured N2 gas cylinder 1 can effectively reduce the liquefaction temperature of the gas by mixing with SF6, and can better adapt to the needs of high and low temperature working conditions in the space environment.

[0049] In this embodiment, the first solenoid valve 15 , the second solenoid valve 16 , the third solenoid valve 17 , the fourth solenoid valve 18 , the fifth solenoid valve 19 and the sixth solenoid valve 20 are used to switch different paths and process the impurity gas at the same time.

[0050] As a specific solution of this embodiment, an N2 pressure detection device 12 is provided on the N2 gas delivery pipeline 3; an SF6 pressure detection device 13 is provided on the SF6 gas delivery pipeline 6; and an end pressure detection device 14 is provided on the second branch gas delivery pipeline 9.

[0051] As a specific solution of this embodiment, a first solenoid valve 15 is provided on the gas outlet end of the N2 gas cylinder 1; a second solenoid valve 16 and a third solenoid valve 17 are provided on the N2 gas delivery pipeline 3, the second solenoid valve 16 is located between the first vacuum chamber 5 and the N2 pressure detection device 12, and the third solenoid valve 17 is located between the multi-stage pressure reducing device 11 and the N2 pressure detection device 12;

[0052] As a specific solution of this embodiment, a fourth solenoid valve 18 is provided on the gas outlet end of the SF6 gas cylinder 2; a fifth solenoid valve 19 and a sixth solenoid valve 20 are provided on the SF6 gas delivery pipeline 6, the fifth solenoid valve 19 is located between the second vacuum chamber 7 and the SF6 pressure detection device 13, and the sixth solenoid valve 20 is located between the multi-stage pressure reducing device 11 and the SF6 pressure detection device 13.

[0053] In this embodiment, the N2 pressure detection device 12, the SF6 pressure detection device 13 and the terminal pressure detection device 14 are used to monitor the pressure values ​​in the pipeline and at the outlet of the gas cylinder; the multi-stage pressure reducing device 11 gradually reduces the pressure of the high-pressure compressed gas in the gas cylinder until the gas pressure meets the pressure required by the high-power microwave insulation equipment to be protected; due to the particularity of the Baschen curve of the discharge of the N2 / SF6 mixed gas, the above-mentioned valve, the multi-stage pressure reducing device 11 and the pressure monitoring device are used in combination to convert the high pressure inside the gas cylinder into the pressure required by the equipment to be protected. Too high or too low a pressure will make the protective effect of the N2 / SF6 mixed gas ineffective.

[0054] As a specific solution of this embodiment, the device further includes a titanium pump 21, which is connected to the gas outlet of the device to be protected 10. In this embodiment, the titanium pump 21 is used to evacuate a small amount of adsorbed gas, and can quickly evacuate the local low-pressure environment instantly released by the high-power space microwave transmission equipment to a certain vacuum level to prevent internal sparks in the microwave equipment.

[0055] As a specific solution of this embodiment, the device also includes a vacuum monitoring device 22, which is connected to the equipment to be protected 10. In this embodiment, the vacuum monitoring device 22 is used to monitor the vacuum level within the pipeline. The vacuum monitoring device 22 is used in conjunction with the titanium pump 21 to monitor the vacuum level inside the high-power space microwave transmission equipment to be protected in real time. When the vacuum level is lower than the required level, the titanium pump 21 is turned on.

[0056] As a specific solution of this embodiment, the device further includes a first temperature control device 23 , which is connected to the equipment to be protected 10 ; the first temperature control device 23 is connected to the first branch gas pipeline 8 .

[0057] As a specific solution of this embodiment, the device further includes a second temperature control device 24, which is connected to both the N2 gas cylinder 1 and the SF6 gas cylinder 2.

[0058] In this embodiment, the first temperature control device 23 and the second temperature control device 24 are used to control the temperature of the gas cylinder and the filling pipeline; on the one hand, the first temperature control device 23 and the second temperature control device 24 can maintain a certain temperature of the gas cylinder of the mixed gas, improve its stability, and avoid liquefaction under the low temperature of the space environment; on the other hand, the equipment to be protected can be baked at a certain temperature, so that the gas on the surface of the material can be quickly decomposed and attached, thereby improving the reliability of high-power space microwave transmission equipment.

[0059] As a specific solution of this embodiment, a first inflation interface 25 and a second inflation interface 26 are provided on the protected equipment 10. The first inflation interface 25 is connected to the first branch gas pipeline 8, and the second inflation interface 26 is connected to the second branch gas pipeline 9.

[0060] Example 2:

[0061] This embodiment provides a method for improving the insulation performance of high-power microwave space equipment based on a N2 / SF6 mixed gas mixture. This method utilizes the high-power microwave space insulation improvement device based on a N2 / SF6 mixed gas mixture described in Example 1. This method is used to address sudden operating conditions, i.e., low vacuum conditions, where the material surface of low-orbit high-power microwave transmission equipment may experience severe outgassing due to temperature rise or ignition. The operating sequence is as follows:

[0062] Step 1: Open the second solenoid valve 16, the third solenoid valve 17, the fifth solenoid valve 19 and the sixth solenoid valve 20, and the first temperature control device 23 and the second temperature control device 24 work. The temperature rises, causing the material to release the residual adsorbed gas on the surface, and the excess gas is discharged into the first vacuum chamber 5 and the second vacuum chamber 7.

[0063] Step 2: Close the second solenoid valve 16 and the fifth solenoid valve 19, and then open the first solenoid valve 15 and the fourth solenoid valve 18. The N2 and SF6 gases in the N2 gas cylinder 1 and the SF6 gas cylinder 2 are released, and the N2 and SF6 gases flow to the main gas pipeline 4 through the N2 gas transmission pipeline 3 and the SF6 gas transmission pipeline 6 respectively. When the N2 and SF6 mixed gas flows through the multi-stage pressure reducing device 11, the pressure drops to 0.3 MPa (gauge pressure).

[0064] In this embodiment, the volume ratio of N2 to SF6 in the N2 / SF6 mixture ranges from 1:3 to 1:10. The specific ratio depends on the ambient temperature of the space and the insulation improvement requirements of the protective equipment. When the temperature is high and the insulation improvement requirements are high, a higher SF6 ratio is selected; otherwise, a higher N2 ratio is selected.

[0065] Step three: Keep the N2 gas delivery pipeline 3, SF6 gas delivery pipeline 6, main gas delivery pipeline 4, first branch gas delivery pipeline 8 and second branch gas delivery pipeline 9 evenly filled with mixed insulating gas and the pressure unchanged until the equipment to be protected 10 finishes working.

[0066] Step 4: During the operation of the equipment to be protected 10 and after the test, the pressure in the N2 gas delivery pipeline 3, the SF6 gas delivery pipeline 6, the main gas delivery pipeline 4, the first branch gas delivery pipeline 8 and the second branch gas delivery pipeline 9 needs to be maintained continuously. When the pressure of the N2 and SF6 mixed gas is lower than a specific value, the gas needs to be replenished immediately.

[0067] In this embodiment, the equipment to be protected 10 is in a good electrical insulation performance state throughout the entire process. When used in a space environment, the peak power capacity of the product can be increased by three orders of magnitude.

[0068] Example 3:

[0069] This embodiment provides a method for improving the insulation performance of high-power microwave space equipment based on N2 / SF6 mixed gas. This method uses the high-power microwave space equipment based on N2 / SF6 mixed gas insulation performance improvement device of Example 1. This method is used to deal with sudden operating conditions of high-orbit high-power microwave space transmission equipment without severe outgassing, i.e., high vacuum conditions. The specific details are as follows:

[0070] In step 1, the first temperature control device 23 and the second temperature control device 24 work, the temperature rises, causing the material to release the residual adsorbed gas on the surface, and the second solenoid valve 16, the third solenoid valve 17, the fifth solenoid valve 19 and the sixth solenoid valve 20 are opened to discharge the excess gas into the first vacuum chamber 5 and the second vacuum chamber 7.

[0071] Step 2: Turn on the vacuum monitoring device 22 to monitor the vacuum degree of the N2 gas pipeline 3, the main gas pipeline 4, the SF6 gas pipeline 6, the first branch gas pipeline 8 and the second branch gas pipeline 9 in real time to ensure that the vacuum degree is always less than or equal to 10 -8 Pa level until the equipment to be protected finishes working.

[0072] Step 3: When the vacuum monitoring device 22 detects that the vacuum degree is lower than the use requirement, the titanium pump 21 is quickly turned on to evacuate the vacuum until the vacuum degree reaches 10 -8 Pa level.

[0073] Comparative Example 1:

[0074] This comparative example provides a method for improving the insulation performance of a high-power microwave space device using a N2 / SF6 mixed gas mixture. This method utilizes the high-power microwave space device using a N2 / SF6 mixed gas mixture as described in Example 1. This method is substantially the same as that described in Example 2, except that in this comparative example, the volume ratio of the N2 to SF6 gas mixture is less than 1:10, specifically, 1:12 to 20.

[0075] In this comparative example, after the device to be protected 10 is used in conjunction with the mixed gas protection device, the electrical performance is not significantly improved.

[0076] Comparative Example 2:

[0077] This comparative example provides a method for improving the insulation performance of a high-power microwave space device using a N2 / SF6 mixed gas mixture. This method utilizes the high-power microwave space device using a N2 / SF6 mixed gas mixture as described in Example 1. This method is substantially the same as that described in Example 2, except that in this comparative example, the volume ratio of the N2 to SF6 gas mixture is greater than 3:1, specifically, 4:1 to 10:1.

[0078] In this comparative example, after the device to be protected 10 is used in conjunction with the mixed gas protection device, the electrical performance is not significantly improved.

[0079] It can be seen from the above-mentioned Example 2 and Comparative Examples 1 and 2 that the present invention adopts a special ratio of N2 / SF6 mixed gas (that is, when the volume ratio of N2 and SF6 gas is in the range of 1:3 to 1:10), which can effectively improve the reliability and safety of the equipment. At the same time, the wide temperature operating range of N2 can effectively reduce the liquefaction temperature of the gas, thereby enabling the equipment to better adapt to the needs of high and low temperature working conditions in the space environment.

Claims

1. A method for improving the insulation of a space high-power microwave based on N2 / SF6 mixed gas, the method using a space high-power microwave insulation improving device based on N2 / SF6 mixed gas; the space high-power microwave insulation improving device based on N2 / SF6 mixed gas comprises an N2 gas cylinder (1) and an SF6 gas cylinder (2); and is characterized in that: The gas outlet end of the N2 gas cylinder (1) is connected to the gas inlet end of the N2 gas delivery pipeline (3), the first gas outlet end of the N2 gas delivery pipeline (3) is connected to the gas inlet end of the main gas delivery pipeline (4), and the second gas outlet end of the N2 gas delivery pipeline (3) is connected to the first vacuum chamber (5); the gas outlet end of the SF6 gas cylinder (2) is connected to the gas inlet end of the SF6 gas delivery pipeline (6), the first gas outlet end of the SF6 gas delivery pipeline (6) is connected to the gas inlet end of the main gas delivery pipeline (4), and the second gas outlet end of the SF6 gas delivery pipeline (6) is connected to the second vacuum chamber (7); the gas outlet end of the main gas delivery pipeline (4) is connected to the gas inlet ends of the first branch gas delivery pipeline (8) and the second branch gas delivery pipeline (9), and the gas outlet ends of the first branch gas delivery pipeline (8) and the second branch gas delivery pipeline (9) are connected to the equipment to be protected (10); A multi-stage pressure reducing device (11) is provided at the connection point between the main gas pipeline (4), the first branch gas pipeline (8), and the second branch gas pipeline (9); A first solenoid valve (15) is provided on the gas outlet end of the N2 gas cylinder (1); a second solenoid valve (16) and a third solenoid valve (17) are provided on the N2 gas delivery pipeline (3); A fourth solenoid valve (18) is provided on the gas outlet end of the SF6 gas cylinder (2); a fifth solenoid valve (19) and a sixth solenoid valve (20) are provided on the SF6 gas delivery pipeline (6); The spatial high-power microwave insulation improvement device based on N2 / SF6 mixed gas further includes a first temperature control device (23), the first temperature control device (23) being connected to the equipment to be protected (10); the first temperature control device (23) being connected to the first branch gas pipeline (8); The spatial high-power microwave insulation improving device based on N2 / SF6 mixed gas further comprises a second temperature control device (24), and the second temperature control device (24) is connected to both the N2 gas cylinder (1) and the SF6 gas cylinder (2); The method uses a mixed gas composed of N2 gas and SF6 gas to protect the equipment to be protected (10); in the mixed gas, the volume ratio of N2 gas to SF6 gas is (1:3) to (1:10); The method is used for sudden working conditions in which severe outgassing occurs due to temperature rise or ignition on the surface of a material of a low-orbit high-power space microwave transmission device. The method specifically comprises the following steps: Step 1: Open the second solenoid valve (16), the third solenoid valve (17), the fifth solenoid valve (19) and the sixth solenoid valve (20), and operate the first temperature control device (23) and the second temperature control device (24). The temperature rises, causing the material to release residual adsorbed gas on the surface, and the excess gas is discharged into the first vacuum chamber (5) and the second vacuum chamber (7); Step 2: close the second solenoid valve (16) and the fifth solenoid valve (19), then open the first solenoid valve (15) and the fourth solenoid valve (18), and the N2 and SF6 gases in the N2 gas cylinder (1) and the SF6 gas cylinder (2) are released. The N2 and SF6 gases flow to the main gas pipeline (4) through the N2 gas delivery pipeline (3) and the SF6 gas delivery pipeline (6), respectively. When the N2 and SF6 mixed gas flows through the multi-stage pressure reducing device (11), the pressure is reduced to 0.3 MPa. Step 3: Keep the N2 gas transmission pipeline (3), the SF6 gas transmission pipeline (6), the main gas transmission pipeline (4), the first branch gas transmission pipeline (8) and the second branch gas transmission pipeline (9) uniformly filled with the mixed insulating gas and the pressure constant until the work of the equipment to be protected (10) is completed; Step 4: During the operation of the equipment to be protected (10) and after the test, the pressure in the N2 gas transmission pipeline (3), the SF6 gas transmission pipeline (6), the main gas transmission pipeline (4), the first branch gas transmission pipeline (8) and the second branch gas transmission pipeline (9) needs to be continuously maintained. When the pressure of the N2 and SF6 mixed gas is insufficient, the gas needs to be replenished immediately.

2. A method for improving the insulation of a space high-power microwave based on N2 / SF6 mixed gas, the method using a space high-power microwave insulation improving device based on N2 / SF6 mixed gas; the space high-power microwave insulation improving device based on N2 / SF6 mixed gas comprises an N2 gas cylinder (1) and an SF6 gas cylinder (2); and is characterized in that: The gas outlet end of the N2 gas cylinder (1) is connected to the gas inlet end of the N2 gas delivery pipeline (3), the first gas outlet end of the N2 gas delivery pipeline (3) is connected to the gas inlet end of the main gas delivery pipeline (4), and the second gas outlet end of the N2 gas delivery pipeline (3) is connected to the first vacuum chamber (5); the gas outlet end of the SF6 gas cylinder (2) is connected to the gas inlet end of the SF6 gas delivery pipeline (6), the first gas outlet end of the SF6 gas delivery pipeline (6) is connected to the gas inlet end of the main gas delivery pipeline (4), and the second gas outlet end of the SF6 gas delivery pipeline (6) is connected to the second vacuum chamber (7); the gas outlet end of the main gas delivery pipeline (4) is connected to the gas inlet ends of the first branch gas delivery pipeline (8) and the second branch gas delivery pipeline (9), and the gas outlet ends of the first branch gas delivery pipeline (8) and the second branch gas delivery pipeline (9) are connected to the equipment to be protected (10); A multi-stage pressure reducing device (11) is provided at the connection point between the main gas pipeline (4), the first branch gas pipeline (8), and the second branch gas pipeline (9); A first solenoid valve (15) is provided on the gas outlet end of the N2 gas cylinder (1); a second solenoid valve (16) and a third solenoid valve (17) are provided on the N2 gas delivery pipeline (3); A fourth solenoid valve (18) is provided on the gas outlet end of the SF6 gas cylinder (2); a fifth solenoid valve (19) and a sixth solenoid valve (20) are provided on the SF6 gas delivery pipeline (6); The spatial high-power microwave insulation improvement device based on N2 / SF6 mixed gas further includes a first temperature control device (23), the first temperature control device (23) being connected to the equipment to be protected (10); the first temperature control device (23) being connected to the first branch gas pipeline (8); The spatial high-power microwave insulation improving device based on N2 / SF6 mixed gas further comprises a second temperature control device (24), and the second temperature control device (24) is connected to both the N2 gas cylinder (1) and the SF6 gas cylinder (2); The method uses a mixed gas composed of N2 gas and SF6 gas to protect the equipment to be protected (10); in the mixed gas, the volume ratio of N2 gas to SF6 gas is (1:3) to (1:10); This method is used to deal with sudden operating conditions of high-orbit high-power space microwave transmission equipment without severe outgassing, and specifically includes the following steps: Step 1: The first temperature control device (23) and the second temperature control device (24) are operated, the temperature rises to cause the material to release the residual adsorbed gas on the surface, and the second solenoid valve (16), the third solenoid valve (17), the fifth solenoid valve (19) and the sixth solenoid valve (20) are opened to discharge the excess gas into the first vacuum chamber (5) and the second vacuum chamber (7); Step 2: Turn on the vacuum monitoring device (22) to monitor the vacuum degree of the N2 gas transmission pipeline (3), the main gas transmission pipeline (4), the SF6 gas transmission pipeline (6), the first branch gas transmission pipeline (8) and the second branch gas transmission pipeline (9) in real time to ensure that the vacuum degree is always less than or equal to 10 -8 Pa level, until the equipment to be protected finishes working; Step 3: When the vacuum degree is detected to be lower than the use requirement, vacuum is quickly evacuated until the vacuum degree is less than or equal to 1×10 -8 Pa.

3. The method for improving the insulation performance of a space high-power microwave based on N2 / SF6 mixed gas according to claim 1 or 2, characterized in that: The N2 gas delivery pipeline (3) is provided with an N2 pressure detection device (12); the second solenoid valve (16) is located between the first vacuum chamber (5) and the N2 pressure detection device (12); and the third solenoid valve (17) is located between the multi-stage pressure reducing device (11) and the N2 pressure detection device (12).

4. The method for improving the insulation performance of a space high-power microwave based on N2 / SF6 mixed gas according to claim 1 or 2, characterized in that: The SF6 gas delivery pipeline (6) is provided with an SF6 pressure detection device (13); the fifth solenoid valve (19) is located between the second vacuum chamber (7) and the SF6 pressure detection device (13); and the sixth solenoid valve (20) is located between the multi-stage pressure reducing device (11) and the SF6 pressure detection device (13).

5. The method for improving the insulation performance of a space high-power microwave based on N2 / SF6 mixed gas according to claim 1 or 2, characterized in that: The second branch gas transmission pipeline (9) is provided with a terminal pressure detection device (14).

6. The method for improving the insulation performance of a space high-power microwave based on N2 / SF6 mixed gas according to claim 1 or 2, characterized in that: It also includes a titanium pump (21), which is connected to the air outlet of the equipment to be protected (10).

7. The method for improving the insulation performance of a space high-power microwave based on N2 / SF6 mixed gas according to claim 1 or 2, characterized in that: It also includes a vacuum monitoring device (22), which is connected to the equipment to be protected (10).

8. The method for improving the insulation performance of a space high-power microwave based on N2 / SF6 mixed gas according to claim 1 or 2, characterized in that: The device to be protected (10) is provided with a first inflation interface (25) and a second inflation interface (26), the first inflation interface (25) is connected to the first branch gas pipeline (8), and the second inflation interface (26) is connected to the second branch gas pipeline (9).

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