N2 / SF6 mixed gas-based space high-power microwave insulation lifting device and method

Abstract

The invention provides a space high-power microwave insulation lifting device and method based on N2 / SF6 mixed gas, the device comprises an N2 gas cylinder, an SF6 gas cylinder and two vacuum bins, the gas cylinder and the vacuum bins are communicated with to-be-protected equipment through a gas path, the gas path is provided with a valve and a pressure detection device, and the pressure detection device is connected with the N2 gas cylinder and the SF6 gas cylinder. And a multi-stage pressure reducing device is arranged on a gas path between the gas cylinder and the to-be-protected equipment. By utilizing the strong electronegativity of the inert gas, the method has the characteristics of reliability, safety and easiness in implementation; through the specific valve and pressure reduction design, according to different application scenes of the space, multiple schemes can be provided to improve the insulation performance of the space microwave transmission device in a targeted and comprehensive manner, and the reliability and safety of space equipment are improved.

Description

Technical Field

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

[0002] With the advancement of space microwave transmission technology and its wide application in related fields, the design and simulation level of traditional microwave devices, equipment, and systems have also made great progress, and the power demand for microwave devices has also increased. For microwave devices, as their power levels continue to increase, if the insulation performance is poor, it will lead to insufficient microwave link power capacity, which will in turn affect the performance of the equipment. Therefore, the insulation performance index design of its microwave transmission link (such as waveguides, isolators and other passive devices) has become a key focus. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a space high-power microwave insulation improvement device based on N2 / SF6 mixed gas, so as to solve the technical problem in the prior art 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 to achieve the above problems:

[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 connecting point of the main gas pipeline, the first branch gas pipeline and the second branch gas pipeline.

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

[0009] A fourth solenoid valve is arranged on the gas outlet end of the SF6 gas cylinder; a fifth solenoid valve and a sixth solenoid valve are arranged 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; and 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 improvement 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 air charging interface and a second air charging interface, the first air charging interface is connected to the first branch gas pipeline, and the second air charging 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 a N2 / SF6 mixed gas, characterized in that the method adopts a space high-power microwave insulation improving device based on a N2 / SF6 mixed gas as described in any one of claims 1 to 7; 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 includes a process for a low-orbit high-power space microwave transmission device or a material surface of a high-power space microwave transmission device in an emergency condition due to temperature rise or severe ignition and gas release, including the following steps:

[0021] Step 1: Open the second solenoid valve and the fourth solenoid valve, and the first temperature control device and the second temperature control device work. The temperature rises to release the residual adsorbed gas on the surface of the material, 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 fourth solenoid valve, and then open the first solenoid valve, the third solenoid valve, the fifth solenoid valve and the sixth 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 delivery pipeline and the SF6 gas delivery pipeline respectively. When the N2 and SF6 mixed gas flows through the multi-stage pressure reducing device, it 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 work of 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 gas pressure of the N2 and SF6 mixed gas is insufficient, the gas needs to be replenished immediately.

[0025] Specifically, the method includes a process for coping with the working conditions of high-orbit high-power space microwave transmission equipment without sudden outgassing, including the following steps:

[0026] 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 and the fourth 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 to 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 adopts 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 under normal pressure. By filling the gas in space microwave transmission devices (such as waveguides and isolators), 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 devices of high-power space microwave transmission equipment; by mixing nitrogen, while ensuring the 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) For low-orbit high-power space microwave transmission equipment (low vacuum degree) or high-power space microwave transmission equipment with sudden material outgassing, the present invention can open the gas cylinder valve to quickly release the mixed gas to improve the insulation performance of the equipment to be protected; for high-orbit high-power space microwave transmission equipment without sudden outgassing (high vacuum degree), the gas cylinder valve can be closed, and the valve connected to the high vacuum environment of the space can be opened to improve the reliability of the equipment by using the high vacuum environment of the space itself. The present invention can meet both low-orbit (low vacuum degree) and high-orbit (high vacuum degree) working conditions through the above-mentioned valve working sequence design, and has high universality.

[0032] (III) The present invention utilizes the strong electronegativity of inert gas and is reliable, safe and easy to implement. Through specific valves and pressure reduction design, it can provide a variety of solutions to improve the insulation performance of space microwave transmission devices in a targeted and comprehensive manner 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 device 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 index 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 delivery pipeline, 4-main gas delivery pipeline, 5-first vacuum chamber, 6-SF6 gas delivery pipeline, 7-second vacuum chamber, 8-first branch gas delivery pipeline, 9-second branch gas delivery 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 in conjunction with 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 pressure reducing device 11 adopts a conventional multi-stage pressure reducing 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 corresponding to low vacuum and high-orbit corresponding to high vacuum. The lifting device designed in the present invention uses a mixed gas cylinder as the main body, utilizes the strong electronegativity of the mixed gas, and uses special designs of valves, pipelines, and remote control and telemetry to greatly improve the insulation performance of on-orbit high-power microwave transmission link equipment, providing a new protection solution for microwave transmission equipment with growing power demand.

[0044] Specifically, the high-pressure compressed sulfur hexafluoride gas is reduced to a normal operating pressure of 0.3MPa through a high-precision multi-stage pressure reducing device. The front end of the pressure reducing device is equipped with a three-way electromagnetic valve. The three-way electromagnetic valve can meet the needs of different application scenarios in space through a certain timing design, and provide a variety of switching schemes. For low vacuum degree of low-orbit equipment or serious material outgassing of high-power space microwave transmission equipment, the gas cylinder valve can be opened to quickly release N2 / SF6 mixed gas to increase the insulation power capacity of the equipment to be protected; for high-orbit equipment and no outgassing, the gas cylinder valve can be closed and the valve connected to the high vacuum environment of space can be opened. The high vacuum environment of space itself and the titanium pump treatment can be used to improve the reliability of the equipment and comprehensively improve the insulation performance of the space microwave transmission device. Leave a passage between the entire system and the space vacuum environment. At the same time, three sets of pressure sensors are configured to monitor the pressure at key positions. The temperature control system can adjust the temperature of the system to meet the temperature requirements of the space use environment. The titanium pump can evacuate the interior of the high-power 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 changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0046] Embodiment 1:

[0047] The present embodiment provides a space high-power microwave insulation lifting 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 for improving power capacity. The SF6 insulating gas itself has a strong electronegativity. By being carried into the space environment through the gas cylinders, the secondary electron multiplication process of the space high-power microwave transmission device can be suppressed, 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 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 passages 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 transmission pipeline 3; an SF6 pressure detection device 13 is provided on the SF6 gas transmission pipeline 6; and a terminal pressure detection device 14 is provided on the second branch gas transmission 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 scheme 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 gas compressed gas in the gas cylinder until the gas pressure meets the pressure required by the high-power microwave insulation equipment to be protected; since the discharge Baschen curve of the N2 / SF6 mixed gas has certain particularities, the high pressure inside the gas cylinder is converted into the pressure required by the equipment to be protected through the coordinated use of the above-mentioned valve, the multi-stage pressure reducing device 11 and the pressure monitoring device. Too high or too low will make the protection 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 degree to avoid ignition inside 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 degree in the pipeline. The vacuum monitoring device 22 is used in conjunction with the titanium pump 21 to monitor the vacuum degree inside the high-power space microwave transmission equipment to be protected in real time. When the vacuum degree is lower than the use requirement, 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, and the second temperature control device 24 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 perform temperature control on 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 device 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] Embodiment 2:

[0061] This embodiment provides a method for improving the insulation of a space high-power microwave based on a N2 / SF6 mixed gas, and the method adopts the space high-power microwave insulation improvement device based on a N2 / SF6 mixed gas in Example 1. The method is used to deal with sudden working conditions, i.e., low vacuum conditions, caused by temperature rise or severe ignition and gas release on the material surface of a low-orbit high-power space microwave transmission device or a high-power space microwave transmission device, and the working sequence is as follows:

[0062] Step 1, open the second solenoid valve 16 and the fourth solenoid valve 18, the first temperature control device 23 and the second temperature control device 24 work, the temperature rises to make the material 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 fourth solenoid valve 18, and then open the first solenoid valve 15, the third solenoid valve 17, the fifth solenoid valve 19 and the sixth solenoid valve 20, the N2 gas cylinder 1 and the SF6 gas cylinder 2 N2 and SF6 gases are released, and 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 drops to 0.3Mpa (gauge pressure).

[0064] In this embodiment, in the N2 and SF6 mixed gas, the volume ratio of N2 and SF6 gas ranges from 1:3 to 1:10. The specific ratio is determined by 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, SF6 is selected to have a higher proportion, otherwise N2 is selected to have a higher proportion.

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

[0066] Step four: 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 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] Embodiment 3:

[0069] This embodiment provides a method for improving the insulation of a space high-power microwave based on a N2 / SF6 mixed gas, which adopts the space high-power microwave insulation improvement device based on a N2 / SF6 mixed gas in Example 1. This method is used to cope with high-orbit high-power space microwave transmission equipment and the working conditions without sudden gas release, that is, high vacuum conditions, and is specifically as follows:

[0070] Step 1: The first temperature control device 23 and the second temperature control device 24 work, the temperature rises to make the material release the residual adsorbed gas on the surface, and the second solenoid valve 16 and the fourth solenoid valve 18 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 of a space high-power microwave based on a N2 / SF6 mixed gas, which adopts the space high-power microwave insulation improvement device based on a N2 / SF6 mixed gas of Example 1. This method is basically the same as Example 2, except that: in this comparative example, in the N2 and SF6 mixed gas, the volume ratio of N2 and SF6 gas is less than 1:10, specifically 1:12 to 20.

[0075] In this comparative example, after the equipment 10 to be protected 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 of a space high-power microwave based on a N2 / SF6 mixed gas, which adopts the space high-power microwave insulation improvement device based on a N2 / SF6 mixed gas of Example 1. This method is basically the same as Example 2, except that: in this comparative example, in the N2 and SF6 mixed gas, the volume ratio of N2 and SF6 gas is higher than 3:1, specifically 4 to 10:1.

[0078] In this comparative example, after the equipment 10 to be protected 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 wider temperature use 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 space high-power microwave insulation improvement device based on N2 / SF6 mixed gas, comprising an N2 gas cylinder (1) and an SF6 gas cylinder (2); 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 connecting point of 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 comprises a first temperature control device (23), the first temperature control device (23) is connected to the equipment to be protected (10); the first temperature control device (23) is connected to the first branch gas pipeline (8); The spatial high-power microwave insulation improvement device based on N2 / SF6 mixed gas also includes 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).

2. The space high-power microwave insulation improvement device based on N2 / SF6 mixed gas according to claim 1 is 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).

3. The space high-power microwave insulation improvement device based on N2 / SF6 mixed gas according to claim 1 is 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).

4. The space high-power microwave insulation improvement device based on N2 / SF6 mixed gas according to claim 1 is characterized in that: The second branch gas transmission pipeline (9) is provided with a terminal pressure detection device (14).

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

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

7. The space high-power microwave insulation improvement device based on N2 / SF6 mixed gas according to claim 1 is 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).

8. A method for improving the insulation of space high-power microwaves based on N2 / SF6 mixed gas, characterized in that: The method adopts a spatial high-power microwave insulation improvement device based on N2 / SF6 mixed gas as described in any one of claims 1 to 7; 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).

9. The method for improving the insulation of a space high-power microwave based on N2 / SF6 mixed gas according to claim 8, characterized in that: The method includes a process for a low-orbit high-power space microwave transmission device or a material surface of a high-power space microwave transmission device that is subjected to sudden operating conditions due to temperature rise or severe ignition and gas release, specifically including the following steps: Step 1: Open the second solenoid valve (16) and the fourth solenoid valve (18), and the first temperature control device (23) and the second temperature control device (24) are operated, and the temperature rises so that the material releases 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); Step 2: close the second solenoid valve (16) and the fourth solenoid valve (18), then open the first solenoid valve (15), the third solenoid valve (17), the fifth solenoid valve (19) and the sixth solenoid valve (20), and release the N2 and SF6 gases in the N2 gas cylinder (1) and the SF6 gas cylinder (2). 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. After the N2 and SF6 mixed gas flows through the multi-stage pressure reducing device (11), the pressure drops to 0.3 MPa. Step 3, keeping 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 mixed insulating gas and with a constant pressure 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 maintained continuously. When the pressure of the N2 and SF6 mixed gas is insufficient, the gas needs to be replenished immediately.

10. The method for improving the insulation of a space high-power microwave based on N2 / SF6 mixed gas according to claim 8, characterized in that: The method includes a process for coping with the working conditions of high-orbit high-power space microwave transmission equipment without sudden 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 so that the material releases the residual adsorbed gas on the surface, and the second solenoid valve (16) and the fourth solenoid valve (18) 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.

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