A gas barrier testing system and method for flexible reflective surface

Abstract

The present invention relates to a gas barrier property testing system for a flexible reflective surface, comprising a fixed tool, a vacuum pump and a pressure gauge, wherein the fixed tool is a cavity with one side open, which is divided into a base and a side portion; the bottom of the side is fixed to the base and sealed with the base, the side and the base form a cavity open on the top, the shape of the upper edge of the side is the same as the shape of the outer edge of the flexible reflective surface, the circumference of the upper edge of the side is smaller than the circumference of the outer edge of the flexible reflective surface, and the height of the side is greater than the chord length of the flexible reflective surface after being subjected to pressure; an air extraction port and a pressure measuring port are provided on the side; the vacuum pump and the pressure gauge are respectively connected to the air extraction port and the pressure measuring port on the fixed tool through an air pipe. The present invention can realize the gas barrier property test and gas barrier performance evaluation of the flexible reflective surface.

Description

Technical Field

[0001] The invention belongs to the field of communication antennas, and in particular relates to a gas barrier testing system and a testing method for a flexible reflective surface. Background Art

[0002] The flexible reflective surface is generally a curved surface, which is installed in the inflatable bladder, and the inflatable bladder is divided into two upper and lower cavities. When working, the surface accuracy is maintained by a certain pressure difference between the upper and lower cavities. After the flexible reflective surface is processed, it needs to be tested for gas barrier properties before being spliced ​​with the inflatable bladder. At present, the gas barrier properties of materials are tested with gas barrier testers, but they can only test the gas barrier properties of small-sized materials, and the general test size is ≤Φ97mm. At present, there is no system and test method that can be used for gas barrier properties testing of large-sized flexible reflective surfaces. Summary of the invention

[0003] The main purpose of the present invention is to provide a gas barrier property testing system for a flexible reflecting surface, so as to solve the problem that the gas barrier property of the flexible reflecting surface cannot be tested before installation.

[0004] In order to solve the existing technical problems, the technical solution adopted by the present invention is: a gas barrier testing system for a flexible reflective surface, including a fixed tool, a vacuum pump and a pressure gauge, the fixed tool is a circular cavity with one side open, divided into a base and a side part; the bottom of the side is fixed on the base and sealed with the base, the side and the base form a cavity open on the top, the shape of the upper edge of the side is the same as the shape of the outer edge of the flexible reflective surface, the circumference of the upper edge of the side is slightly smaller than the circumference of the outer edge of the flexible reflective surface, and the height of the side is greater than the chord length of the flexible reflective surface after being subjected to pressure; an air suction port and a pressure measuring port are provided on the side; the vacuum pump and the pressure gauge are respectively connected to the air suction port and the pressure measuring port on the fixed tool through air pipes.

[0005] In order to ensure good sealing, the upper edge of the side of the fixing tool is a sloped surface sloping toward the cavity.

[0006] For the convenience of testing, in particular, pipeline switches may be provided between the vacuum pump and the air extraction port and between the pressure gauge and the pressure measuring port, respectively, according to the present invention.

[0007] The test method of the gas barrier test system comprises the following steps:

[0008] Put the flexible reflective surface on the fixed tooling;

[0009] Use sealing material to seal the connection between the flexible reflective surface and the fixed tooling;

[0010] Connect the pressure measuring pipeline and the air extraction pipeline;

[0011] Start the vacuum pump to create a vacuum;

[0012] Record the pressure value at regular intervals.

[0013] The gas barrier property testing system of the flexible reflective surface of the present invention comprises a fixed tool, a sealing material, a vacuum pump, an air pipe, a pressure gauge, a pipeline switch and a pipeline joint. When testing the gas barrier property of the flexible reflective surface, the reflective surface is firstly put on the fixed tool; then the connection between the flexible reflective surface and the fixed tool is sealed with the sealing material to form a sealed cavity between the flexible reflective surface and the fixed tool; then the exhaust pipeline is connected; after the vacuum pump is started to evacuate to a certain pressure value, the pressure value is recorded at regular intervals, and whether the gas barrier property of the flexible reflective surface meets the use requirements can be evaluated based on the pressure change value within a certain period of time.

[0014] Beneficial effects of the present invention: The present invention provides a flexible reflective surface gas barrier testing system and testing method, which can realize flexible reflective surface gas barrier testing and gas barrier performance evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of flexible reflective surface;

[0016] Figure 2 Schematic diagram of fixed tooling;

[0017] Figure 3 Schematic diagram of the gas barrier testing system and method for flexible reflective surface.

[0018] The reference numerals in the figure are: 1 is a flexible reflecting surface, 2 is a fixing tool, 3 is a sealing material, 4 is a vacuum pump, 5 is a pressure gauge, 6 is an air pipe, 7 is a pipe joint, 8 is a pipe switch, 2001 is a base, 2002 is a side, 2003 is an air extraction port and 2004 is a pressure measuring port. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0020] A flexible reflective surface gas barrier testing system and testing method of the present invention comprises a fixing tool 2, a sealing material 3, a vacuum pump 4, a pressure gauge 5, an air pipe 6, a pipeline joint 7, and a pipeline switch 8.

[0021] During the test, first put the Φ1.8m reflecting surface 1 on the fixed tooling 2; then use the sealing material 3 to seal the connection between the flexible reflecting surface 1 and the fixed tooling 2, so that a sealed cavity is formed between the flexible reflecting surface 1 and the fixed tooling 2; connect the vacuum pump 4, pressure gauge 5, air pipe 6, pipeline joint 7, pipeline switch 8, turn off the pressure gauge pipeline switch, turn on the vacuum pipeline switch, vacuumize until the flexible reflecting surface is fully unfolded, stop vacuuming, turn off the vacuum pipeline switch, turn on the pressure gauge pipeline switch, and record the pressure value; then record the pressure value every certain period of time.

[0022] Before testing, the air tightness test of the exhaust pipeline should be carried out. The air tightness test method is: start the vacuum pump, evacuate to a certain pressure, use a brush to brush bubble water or soapy water to the joints to see if there are bubbles. If there are bubbles, it is necessary to reconnect the pipeline or replace the air pipe, pipeline joint or pipeline switch; if there are no bubbles, it means that the pipeline is not leaking.

[0023] The sources of the main hardware of the present invention are as follows: the design and processing manufacturer of the fixed tooling is the 46th Institute of the Sixth Academy of China Aerospace Science and Industry Corporation; the vacuum pump manufacturer is Linhai Tan's Vacuum Equipment Co., Ltd.; and the vacuum gauge manufacturer is Shenyang Pressure Measuring Instrument Factory.

[0024] The test results obtained by the present invention are shown in Table 1.

[0025] Table 1 Pressure test data

[0026] time Pressure (Pa) 13：15 598.7 13：25 572.4 13：35 566.3 13：45 559.5 13：55 558.0 14：05 552.2 14：15 533.6

Claims

1. A gas barrier property testing system for a flexible reflective surface, comprising a fixing device (2), a vacuum pump (4) and a pressure gauge (5), characterized in that: The fixed tooling (2) is a cavity with one side open, which is divided into a base and a side portion; the bottom of the side portion is fixed to the base and sealed with the base, the side portion and the base form a circular cavity with an open top, the shape of the upper edge of the side portion is the same as the shape of the outer edge of the flexible reflecting surface (1), the upper edge of the side of the fixed tooling is a sloped surface sloping toward the cavity, the circumference of the upper edge of the side portion is smaller than the circumference of the outer edge of the flexible reflecting surface (1), and the height of the side portion is greater than the chord length of the flexible reflecting surface (1) after being subjected to pressure; an air extraction port and a pressure measuring port are provided on the side portion; The pressure gauge (5) of the vacuum pump (4) is respectively connected to the air extraction port and the pressure measuring port on the fixed tooling (2) through an air pipe (6); a pipeline switch (8) is provided between the pressure gauge (5) and the pressure measuring port, and a pipeline joint (7) is provided between the pressure gauge (5) and the pipeline switch (8).

2. The gas barrier testing system according to claim 1, characterized in that: A pipeline switch (8) is provided between the vacuum pump (4) and the air extraction port.

3. The testing method of the gas barrier testing system according to claim 1 or 2, wherein the testing process is as follows: Putting the flexible reflective surface (1) on the fixed tooling (2); The connection between the flexible reflective surface (1) and the fixed tooling (2) is sealed with a sealing material (3); Connect the pressure measuring pipeline and the air extraction pipeline; Start the vacuum pump (4) to create a vacuum; Record the pressure value at regular intervals.

4. The testing method according to claim 3, characterized in that: The test also includes an air tightness test of the exhaust pipeline. The air tightness test process is to start the vacuum pump, evacuate to a certain pressure, and use a brush to brush bubbling water or soapy water to the joints to see if there are bubbles. If there are bubbles, it is necessary to reconnect the pipeline or replace the air pipe, pipeline joint or pipeline switch; if no bubbles are generated, it means that the pipeline is not leaking.

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