Inflation pipe joint for eliminating stray light

Abstract

The invention belongs to the technical field of spaceflight, and discloses a stray light eliminating inflation pipe connector which comprises an inflation pipe connector, a matting pipe, matting coatings and a mounting flange, the matting pipe is composed of a plurality of sets of bent sections, the inner wall of the inflation pipe connector, the inner wall, the outer wall and the end of the matting pipe are subjected to black treatment through the matting coatings, and the matting coatings are high-absorption coatings; according to the device, most of light entering the optical instrument from the inlet of the inflation tube is absorbed after being reflected for multiple times on the tube wall through a pipeline folding method; by means of a pipeline folding method, most of light entering the optical instrument from the inlet of the inflation pipe is absorbed after being reflected for multiple times when passing through the pipe wall, and the problem that stray light is introduced in a non-working state due to the fact that stray light pollution is not considered for an inflation pipe connector of an existing optical instrument is solved.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and particularly to a gas-filled tube joint for eliminating stray light. Background Art

[0002] Optical payloads are extremely sensitive to the space environment, and contamination such as dust and water vapor may cause a decline in their performance or even failure. To prevent contamination of optical mirrors or other sensitive components by dust, water vapor, etc. in the air before launch, nitrogen protection measures are usually adopted before launch, that is, the interior of the payload is filled with dry nitrogen to form an isolation protection layer.

[0003] Generally, a few hours before launch, according to the launch preparation process, the nitrogen protection tube is removed, and a part of the gas-filled tube joint connector remains on the optical payload. However, these joints connect the interior and exterior of the payload and are prone to being irradiated by sunlight, reflected light from the ground, or the satellite surface during orbit, becoming a source of stray light and directly affecting the optical performance of the payload. Therefore, there is an urgent need for a gas-filled tube joint for eliminating stray light to solve such problems. Summary of the Invention

[0004] The present invention aims to provide a gas-filled tube joint for eliminating stray light to solve the problem that the gas-filled tube joints of existing optical instruments lack consideration for stray light contamination and introduce stray light in the non-working state.

[0005] To achieve the above object, the present invention provides the following technical solution:

[0006] The basic technical solution provided by the present invention is: a gas-filled tube joint for eliminating stray light, including a gas-filled tube interface, a light extinction tube, a light extinction coating, and a mounting flange; the inner wall of the gas-filled tube interface, the inner and outer walls of the light extinction tube and its ends are all blackened by the light extinction coating; the light extinction tube is composed of several groups of bent segments.

[0007] Principle of the basic technical solution: Place the light extinction tube inside the instrument, place the gas-filled tube interface outside the instrument, and fixedly connect this device to the optical instrument through the mounting flange. This gas-filled tube joint is a pipeline structure with openings at both ends, and gas flows between the gas-filled tube interface and the light extinction tube; stray light is absorbed by the black coating after multiple reflections when passing through the bent part.

[0008] Advantageous effects of the basic technical solution: Stray light enters the joint through the gas-filled tube interface, and most of the light entering the interior of the optical instrument from the gas-filled tube inlet is eliminated through multiple reflections and absorption of the stray light by the bent part. Through the black coating treatment, the absorption rate of the tube wall to stray light is improved, further enhancing the effect of the gas-filled tube joint in eliminating stray light, and solving the problem that the gas-filled tube joints of existing optical instruments lack consideration for stray light contamination and introduce stray light in the non-working state.

[0009] Preferably, the bending angle of the bent section is 50 degrees to 70 degrees.

[0010] Preferably, the bending angle of the bent section is 60 degrees.

[0011] With the above settings, a reasonable angle setting is beneficial to improving the reliability of reflecting stray light.

[0012] Preferably, the extinction coating is a high-absorption coating.

[0013] With the above settings, the high-absorption coating is beneficial to absorbing stray light. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a gas charging pipe joint for eliminating stray light according to the present invention;

[0015] Figure 2 Figure 1 A sectional view taken along line A-A in

[0016] 1. Gas charging pipe interface; 2. Extinction tube; 3. Extinction coating; 4. Mounting flange. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will be further described in detail below in conjunction with the drawings and embodiments:

[0018] As Figures 1 to 2 shown, a gas charging pipe joint for eliminating stray light includes a gas charging pipe interface, an extinction tube, an extinction coating, and a mounting flange; the inner wall of the gas charging pipe interface, the inner and outer walls of the extinction tube and its ends are all blackened by the extinction coating, and the extinction coating is a high-absorption coating; the extinction tube is composed of several groups of bent sections, and the bending angle of the bent section is 60 degrees.

[0019] The specific implementation process is as follows:

[0020] When using the present invention, place the extinction tube 2 inside the optical instrument, place the gas charging pipe interface 1 outside the optical instrument, and fixedly connect the device to the optical instrument through the mounting flange 4 to improve the stability of the device. After connecting the gas charging pipe interface 1 to the nitrogen protection tube, nitrogen can be filled into the optical instrument; when the nitrogen protection tube is removed, stray light will enter the device through the gas charging pipe interface 1. The stray light is reflected multiple times by the bent part of the extinction tube 2 and absorbed multiple times by the coating and then eliminated, preventing it from entering the optical instrument.

[0021] The above are only embodiments of the present invention, and common general technical solutions or characteristics in the solutions are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solutions of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. An inflatable pipe joint for eliminating stray light, characterized in that: It comprises an air pipe interface (1), a matte pipe (2), a matte coating (3) and a mounting flange (4); the inner wall of the air pipe interface (1), the inner and outer walls of the matte pipe (2) and the end thereof are all treated with black through the matte coating (3); the matte pipe (2) is composed of a plurality of groups of bent sections.

2. The stray light eliminating inflatable pipe joint according to claim 1, characterized in that: The bending angle of the bending section is 50 degrees to 70 degrees.

3. The stray light eliminating inflatable pipe joint according to claim 2, characterized in that: The bending angle of the bending section is 60 degrees.

4. The stray light eliminating inflatable pipe joint according to claim 1, characterized in that: The matte coating (3) is a high absorption coating.

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