Wire harness perforation structure and waterproof detection tool thereof

Abstract

The utility model relates to the technical field of aviation assembly electronic products, and discloses a wire harness perforation structure and a waterproof detection tool thereof, a wire passing hole is arranged on a mounting plate, a wire harness is arranged between a raining cavity and a non-raining cavity in a penetrating manner through the wire passing hole, and an encapsulation area is arranged at the wire passing hole. And the gap between the wire passing hole and the wire harness is sealed by using the sealant, so that the signal transmission of the aviation airborne computer electronic product is realized, and the waterproof isolation requirement between the raining cavity and the non-raining cavity is met. Besides, the mounting plate is fixed at the opening position of the box body, the opening of the box body is covered, the wire harness at one end of the mounting plate extends into the inner cavity of the box body from the opening, and a rain test filled with sealant is examined by adjusting dripping water of the scattering pipe, so that a basis is provided for waterproof design of a wire harness perforation structure.

Description

Technical Field

[0001] This utility model relates to the field of aviation component electronic product technology, and discloses a wire harness perforation structure and its waterproof testing fixture. Background Technology

[0002] As the requirements for rain protection of airborne computer electronic products become increasingly stringent, some computers also require waterproof isolation of cable passages between different cavities (rain-proof cavities and non-rain-proof cavities). In traditional projects, the cable passage design uses a large hole to pass all cables through, resulting in poor sealing of the cable passage, especially between cable bundles, thus failing to meet waterproof requirements. Utility Model Content

[0003] The purpose of this invention is to provide a wire harness perforation structure and its waterproof testing fixture, enabling signal transmission in airborne computer electronic products while meeting the waterproof isolation requirements between rain-exposed and non-rain-exposed chambers. Furthermore, by adjusting the dripping water from the distribution pipe to conduct rain tests on sealant-filled components, this provides a basis for the waterproof design of the wire harness perforation structure.

[0004] To achieve the above-mentioned technical effects, the technical solution adopted by this utility model is as follows:

[0005] A wire harness perforation structure, comprising:

[0006] Mounting plate, which is disposed between the rain-exposed chamber and the non-rain-exposed chamber of the airborne computer electronic product;

[0007] The potting area is a raised ring or groove provided on the mounting plate, used to form an area for receiving sealant;

[0008] A wire passage hole is provided on the mounting plate and located within the potting area. The wire passage hole is used to provide a channel for the wire harness to pass through.

[0009] Furthermore, the wire harness threaded between the rain-soaking chamber and the non-rain-soaking chamber is multi-stranded, and the number of wire holes corresponds one-to-one with the number of wire harnesses.

[0010] Furthermore, each of the wire-passing holes is a stepped hole, and the stepped edge of the wire-passing hole is located within the potting area.

[0011] To achieve the above-mentioned technical effects, the present invention also provides a waterproof testing fixture for a wire harness perforated structure, used to test the waterproof performance of the wire harness perforated structure, including:

[0012] The box body includes a bottom surface and side surfaces, and the top surface of the box body has an opening; the mounting plate is disposed on the top surface of the box body and covers the opening;

[0013] The dispensing pipe is located directly above the box body, and its inlet end is connected to the water supply device for dripping water droplets directly below the dispensing pipe.

[0014] Furthermore, the sides of the box are made of transparent material, and the sides of the box are marked with graduations.

[0015] Furthermore, the mounting plate is sealed to the opening edge of the box body.

[0016] Furthermore, the side wall of the box is provided with two air nozzles through which air can flow, one of which is equipped with a flow regulating valve; the other air nozzle is connected to the air extraction mechanism for supplying or extracting air into the inner cavity of the box.

[0017] Furthermore, it also includes a pressure gauge, the pressure sensing end of which is located inside the cavity of the box.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model provides a wire-passing hole on the mounting plate, through which the wire harness passes between the rain-proof chamber and the non-rain-proof chamber. A potting area is provided at the wire-passing hole, and sealant is used to seal the gap between the wire-passing hole and the wire harness. This enables signal transmission of airborne computer electronic products while meeting the waterproof isolation requirements between the rain-proof chamber and the non-rain-proof chamber.

[0020] 2. By fixing the mounting plate to the opening of the box and covering the opening, the wire harness at one end of the mounting plate extends into the inner cavity of the box through the opening. The rain test is conducted on the sealed material by adjusting the dripping water of the dispensing pipe, which provides a basis for the waterproof design of the wire harness perforation structure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the wire harness perforation structure in the embodiment;

[0022] Figure 2 This is a schematic diagram of the wire harness perforation structure and its waterproof testing fixture in the embodiment;

[0023] The components include: 1. Mounting plate; 2. Potting area; 3. Sealant; 4. Wiring hole; 5. Wiring harness; 6. Box; 7. Dispensing pipe; 8. Air nozzle; 9. Flow regulating valve; 10. Air extraction and release mechanism; 11. Pressure gauge. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0025] Example

[0026] See Figures 1-2 A wire harness perforation structure, comprising:

[0027] Mounting plate 1 is disposed between the rain-exposed chamber and the non-rain-exposed chamber of the airborne computer electronic product;

[0028] Encapsulation area 2, which is a raised ring or groove provided on the mounting plate 1, is used to form an area for accommodating sealant 3;

[0029] The wire passage hole 4 is formed on the mounting plate 1 and is located within the potting area 2. The wire passage hole 4 is used to provide a channel for the wire harness 5 to pass through.

[0030] In this embodiment, the wire harness 5 passes through the wire hole 4 on the mounting plate 1 between the rain-proof chamber and the non-rain-proof chamber, and a potting area 2 is set at the wire hole 4. The gap between the wire hole 4 and the wire harness 5 is sealed by the sealant 3, so as to realize the signal transmission of the airborne computer electronic product and meet the waterproof isolation requirements between the rain-proof chamber and the non-rain-proof chamber.

[0031] It should be noted that, in this embodiment, the potting area 2 can be a potting groove that is recessed into the mounting plate 1, or it can be a potting ring that protrudes from the surface of the mounting plate 1, as long as the potting area 2 that accommodates the sealant 3 is formed.

[0032] In this embodiment, the wire harness 5 passing between the rain-exposed chamber and the non-rain-exposed chamber is multi-stranded, and the number of wire passage holes 4 corresponds one-to-one with the number of wire harnesses 5. By designing one wire passage hole 4 for each wire harness 5 and fully filling the potting area 2 with sealant 3, the wire passage hole 4 is sealed, avoiding the problem that the gaps between the wire harnesses 5 cannot be filled by the sealant 3 when multiple wire harnesses 5 are passed through the same wire passage hole 4, thereby further improving the waterproofing requirements.

[0033] In this embodiment, each wire hole 4 is a stepped hole, and the stepped edge of the wire hole 4 is located within the potting area 2. By setting each wire hole 4 in the potting area 2 as a stepped hole, the contact area between the sealant 3 and the potting area 2 and the contact area between the sealant 3 and the wire harness 5 are increased, ensuring the adhesive performance of the sealant 3 and preventing the problem of detachment.

[0034] Based on the same inventive concept, this embodiment also provides a waterproof testing fixture for wire harness perforation structures, used to test the waterproof performance of the wire harness perforation structure, including:

[0035] Box 6, which includes a bottom surface and a side surface, and an opening is provided on the top surface of the box 6; the mounting plate 1 is disposed on the top surface of the box 6 and covers the opening;

[0036] Dispensing pipe 7 is located directly above the box body 6. The inlet end of the dispensing pipe 7 is connected to the water supply device and is used to drip water droplets directly below the dispensing pipe 7.

[0037] In this embodiment, by fixing the mounting plate 1 at the opening of the box 6 and covering the opening of the box 6, the wire harness 5 at one end of the mounting plate 1 extends into the inner cavity of the box through the opening. The rain test of the sealant 3 is evaluated by adjusting the dripping water of the dispensing pipe 7, which provides a basis for the waterproof design of the wire harness 5 perforated structure.

[0038] In this embodiment, the side of the box 6 is made of transparent material, and the side of the box 6 is provided with scales to quantify the amount of water seepage in the rain test.

[0039] In this embodiment, the mounting plate 1 is sealed to the edge of the opening of the box 6, which can avoid the problem of water flowing into the inner cavity of the box 6 from the gap between the mounting plate 1 and the opening during the rain test, and ensure the accuracy of the test data.

[0040] In this embodiment, two air nozzles 8 are provided on the side wall of the housing 6 to allow airflow. One air nozzle 8 is equipped with a flow regulating valve 9; the other air nozzle 8 is connected to the air extraction / release mechanism 10 for supplying or extracting air into the cavity of the housing 6. Based on the pressure difference between the rain-exposed and non-rain-exposed chambers during actual use, the air extraction / release mechanism 10 extracts or releases air from the cavity of the housing 6. The flow regulating valve 9 is adjusted to regulate the air intake or exhaust volume of the air nozzle 8, creating an environment within the cavity of the housing 6 with a pressure difference comparable to that in actual use. This allows for testing to obtain the waterproof performance of the wire harness 5 perforated structure under conditions close to actual use. To ensure that water does not enter the air nozzle 8 during testing, both air nozzles 8 in this embodiment are located on the upper side wall of the housing 6.

[0041] The waterproof testing fixture in this embodiment also includes a pressure gauge 11. The pressure sensing end of the pressure gauge 11 is located in the inner cavity of the box 6. The pressure gauge 11 can more accurately obtain the pressure in the inner cavity of the box 6 during the test, ensuring that it matches the pressure of the actual use environment, so as to further ensure the accuracy of the test data.

[0042] In this embodiment, the rain test can be conducted according to the GJB150.8A-2009 standard, and the test requirements are as follows:

[0043] Experimental procedure – dripping water

[0044] —Drip rate: 280L / (m 2 ·h);

[0045] —Drip velocity: The drip height should ensure that the final velocity of the water droplets is 9m / s;

[0046] —Raindrop size: Using the 7-stage spray tube, small raindrops are enlarged to the maximum extent;

[0047] —Temperature: The temperature of the specimen should be at least 10°C higher than the water temperature before the test;

[0048] —Specimen condition: The orientation of specimen 1 on mounting plate should ensure that all upper surfaces are simultaneously subjected to water droplets; for specimens with instruments with glass covers, they should be tilted at a 45° angle;

[0049] —The duration of water drip exposure for specimen 1 on mounting plate was 15 minutes.

[0050] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wire harness perforation structure, characterized in that, include: Mounting plate (1), the mounting plate (1) is disposed between the rain-exposed cavity and the non-rain-exposed cavity of the airborne computer electronic product; The potting area (2) is a raised ring or groove provided on the mounting plate (1) for forming an area to accommodate sealant (3); A wire passage hole (4) is provided on the mounting plate (1) and located within the potting area (2). The wire passage hole (4) is used to provide a channel for the wire harness (5) to pass through.

2. The wire harness perforation structure according to claim 1, characterized in that, The wire harness (5) threaded between the rain-soaking chamber and the non-rain-soaking chamber is multi-stranded, and the number of wire holes (4) corresponds one-to-one with the number of wire harnesses (5).

3. The wire harness perforation structure according to claim 2, characterized in that, Each of the wire holes (4) is a stepped hole, and the stepped edge of the wire hole (4) is located within the potting area (2).

4. A waterproof testing fixture for a wire harness perforated structure, used to test the waterproof performance of the wire harness perforated structure according to any one of claims 1-3, characterized in that, include: Box body (6), the box body (6) includes a bottom surface and a side surface, and the top surface of the box body (6) is provided with an opening; the mounting plate (1) is disposed on the top surface of the box body (6), and the mounting plate (1) covers the opening; The dispensing pipe (7) is located directly above the box body (6). The inlet end of the dispensing pipe (7) is connected to the water supply device and is used to drip water droplets directly below the dispensing pipe (7).

5. The waterproof testing fixture according to claim 4, characterized in that, The side of the box (6) is made of transparent material, and the side of the box (6) is provided with scale.

6. The waterproof testing fixture according to claim 4, characterized in that, The mounting plate (1) is sealed to the opening edge of the box body (6).

7. The waterproof testing fixture according to claim 6, characterized in that, The side wall of the box (6) is provided with two air nozzles (8) through which air can flow. One of the air nozzles (8) is provided with a flow regulating valve (9). The other air nozzle (8) is connected to the air extraction mechanism (10) and is used to supply or extract air to the inner cavity of the box (6). Both air nozzles (8) are located on the corresponding side wall position in the upper part of the box (6).

8. The waterproof testing fixture according to claim 7, characterized in that, It also includes a pressure gauge (11), the pressure sensing end of which is located in the inner cavity of the box (6).

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