Wire cable for aerospace and mechanical property detection device thereof

Abstract

The invention relates to the technical field of cables, in particular to an aerospace electric wire and cable and a mechanical property detection device thereof, and the cable comprises a cable core, and an insulating layer, a shielding layer, an inner sheath, a flame-retardant layer, an outer sheath and a wear-resistant protection layer which are sequentially coated outside the cable core from inside to outside. The detection device comprises a test board, a test mechanism arranged on the test board and two clamping mechanisms located on the left side and the right side of the test mechanism, and a reciprocating driving mechanism connected with the two clamping mechanisms is arranged at the bottom of the test board. The wear resistance of the cable is greatly improved, and the internal structure of the cable can be effectively protected; according to the testing device disclosed by the invention, the plurality of testing rings which are sequentially distributed and have collinear central axes are arranged, and the friction surfaces for simulating different friction environments are correspondingly arranged on the inner ring wall of each testing ring, so that the testing requirements of different testing environments can be met, and the application range is greatly expanded.

Description

Technical Field

[0001] The present invention relates to the field of cable technology, in particular to an aerospace electric wire and cable and a mechanical property detection device thereof. Background Art

[0002] my country's aerospace industry is booming, and wires and cables have a special and important position in aerospace products. At the same time, aerospace wires and cables are restricted by their use conditions and environment, and the performance requirements of the materials used are getting higher and higher. Among them, its wear resistance is particularly important. If the wear resistance does not meet the requirements, it is very easy to cause damage to the cable, expose its internal structure, and even cause casualties or property losses. Therefore, it is necessary to improve the wear resistance of wires and cables; in addition, after the wires and cables are manufactured, their mechanical properties need to be tested to ensure that the wires and cables leaving the factory meet the performance requirements. Most of the existing wire and cable performance testing devices or equipment have many limitations or inconveniences: such as single test, unreasonable design of the clamping mechanism used for testing, excessive clamping force is easy to break the cable, and too small clamping force is easy to fall off the cable, affecting the test. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes an aerospace wire and cable and a mechanical property detection device thereof.

[0004] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0005] A wire and cable for aerospace use comprises: a cable core, an insulating layer, a shielding layer, an inner sheath, a flame retardant layer, an outer sheath, and a wear-resistant protective layer which are sequentially coated on the outside of the cable core from the inside to the outside.

[0006] A mechanical property detection device for aerospace wires and cables, used for testing the above-mentioned aerospace wires and cables, comprises a test bench, a test mechanism arranged on the test bench, and two groups of clamping mechanisms located on the left and right sides of the test mechanism, wherein the test mechanism comprises a vertical plate arranged on the test bench, and a plurality of test rings arranged side by side on the front side plate surface of the vertical plate, the two groups of clamping mechanisms each comprise a bottom plate, a first clamping assembly and a second clamping assembly arranged on the bottom plate, the first clamping assembly being close to the test mechanism, the bottom plate sliding along the left and right directions, and a reciprocating drive mechanism connected to two bottom plates in the two groups of clamping mechanisms being arranged at the bottom of the test bench.

[0007] The beneficial effects of the present invention are:

[0008] The present invention provides an aerospace wire and cable, which greatly improves its wear resistance and can effectively protect the internal structure of the cable; provides an aerospace wire and cable mechanical property detection device, by setting a plurality of test rings distributed in sequence and with colinear central axes, and each test ring has a corresponding friction surface simulating different friction environments on its inner ring wall, thereby meeting the test requirements of different test environments and greatly improving the scope of application; by setting a first clamping component and a second clamping component, it can ensure that the cable does not fall off and will not be clamped and broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0010] Figure 1 It is a schematic diagram of the cross-sectional structure of wires and cables;

[0011] Figure 2 It is the overall structural diagram of the test device;

[0012] Figure 3 It is a schematic diagram of the main cross-sectional structure of the test device;

[0013] Figure 4 It is a schematic diagram of the structure of the clamping mechanism on the test device.

[0014] In the figure: 1. cable core; 2. insulation layer; 3. shielding layer; 4. inner sheath; 5. flame retardant layer; 6. outer sheath; 7. wear-resistant protective layer; 8. test bench; 9. vertical plate; 10. test ring; 11. bottom plate; 12. friction surface; 13. lower guide cable roller; 14. upper guide cable roller; 15. fixing frame; 16. pressing guide rod; 17. pressing seat; 18. fixing card slot; 19. fixing card block; 20. lower clamping seat; 21. upper clamping seat; 22. clamping threaded rod; 23. clamping nut; 24. cam; 25. driving motor; 26. action plate; 27. connecting frame; 28. mounting plate; 29. ​​spring; 30. guide slide groove. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1As shown, an aerospace wire and cable mainly consists of a cable core 1, an insulating layer 2, a shielding layer 3, an inner sheath 4, a flame retardant layer 5, an outer sheath 6, and a wear-resistant protective layer 7. The insulating layer 2 is coated on the outside of the cable core 1 to play an insulating role; the shielding layer 3 is coated on the outside of the insulating layer 2, and in this embodiment, it is a metal mesh woven from copper and aluminum to play a role in shielding external interference signals; the inner sheath 4 is coated on the outside of the shielding layer 3; the inner sheath 4 and the outer sheath 6 together protect the internal structure of the cable; the flame retardant layer 5 is located between the inner sheath 4 and the outer sheath 6 to play a flame retardant role; the wear-resistant protective layer 7 is coated on the outside of the outer sheath 6.

[0017] like Figures 2 to 4 As shown, a mechanical property detection device for aerospace wires and cables is used for testing the above-mentioned aerospace wires and cables, including a test bench 8, a test mechanism arranged on the test bench 8, and two groups of clamping mechanisms located on the left and right sides of the test mechanism, wherein the test mechanism is arranged in the middle position of the test bench 8. Specifically, the test mechanism includes a vertical plate 9 arranged on the test bench 8, and a plurality of test rings 10 arranged side by side on the front side plate surface of the vertical plate 9. In the present embodiment, three test rings 10 are arranged, and the three test rings 10 are distributed in sequence along the left and right directions, and the central axes are collinear; the two groups of clamping mechanisms each include a bottom plate 11, a first clamping assembly and a second clamping assembly arranged on the bottom plate 11, the first clamping assembly is close to the test mechanism, and the bottom plate 11 slides along the left and right directions. A reciprocating drive mechanism connected to two bottom plates 11 in the two groups of clamping mechanisms is arranged at the bottom of the test bench 8.

[0018] As a further improvement of this embodiment, friction surfaces 12 for simulating different friction environments are correspondingly arranged on the inner ring walls of the three test rings 10. Through the above structural design, the test requirements of different test environments can be met, greatly improving the scope of application.

[0019] As a further improvement of this embodiment, the first clamping assembly includes a lower guide cable roller 13 and an upper guide cable roller 14 which are distributed side by side and staggered up and down, the upper roller surface of the lower guide cable roller 13 and the inner ring bottom wall of the test ring 10 are at the same horizontal height, the lower guide cable roller 13 is installed on the base plate 11 through a fixing frame 15, and the base plate 11 is provided with two pressing guide rods 16 distributed front and back, and a pressing seat 17 is slidably installed on the two pressing guide rods 16, the upper guide cable roller 14 is connected to the pressing seat 17, and the lower roller surface of the upper guide cable roller 14 and the inner ring top wall of the test ring 10 are at the same horizontal height.

[0020] Furthermore, a plurality of fixed card slots 18 are evenly distributed along the vertical direction on the front rod wall of the front pressing guide rod 16 and the rear rod wall of the rear pressing guide rod 16. Fixed card blocks 19 that can cooperate with the fixed card slots 18 are rotatably installed on the front and rear sides of the pressing seat 17, and the fixed card blocks 19 are L-shaped structures. In this embodiment, eleven fixed card slots 18 are provided on each pressing guide rod 16, and the eleven fixed card slots 18 are evenly distributed. Through the above structure, the upper guide cable roller 14 is pressed downward to make the cable bend downward around the lower guide cable roller 13. After the upper guide cable roller 14 is pressed down to the right position, the fixed card block 19 is turned over, and the card end of the fixed card block 19 is inserted into the fixed card slot 18.

[0021] As a further improvement of this embodiment, the second clamping assembly includes a lower clamping seat 20 arranged on the base plate 11, an upper clamping seat 21 located above the lower clamping seat 20, and two clamping threaded rods 22 located on the front and rear sides of the upper clamping seat 21. The front and rear sides of the upper clamping seat 21 are correspondingly slid on the two clamping threaded rods 22, and two clamping nuts 23 are correspondingly arranged on the two clamping threaded rods 22. The two clamping nuts 23 are in contact with the upper end surfaces on the front and rear sides of the upper clamping seat 21.

[0022] As a further improvement of this embodiment, the reciprocating drive mechanism includes a cam 24 arranged in the test bench 8, a drive motor 25 arranged outside the test bench 8 and connected to the cam 24, two action plates 26 located on the left and right sides of the cam 24 and abutting against the cam 24, and two connecting frames 27 are connected between the two action plates 26 and the two bottom plates 11 in the two groups of clamping mechanisms. A mounting plate 28 is arranged at the middle position of the inner top of the test bench 8, and the mounting plates 28 are distributed along the front and back, and springs 29 are connected between the left and right side plate surfaces of the mounting plate 28 and the upper ends of the two action plates 26. Two guide slots 30 are provided on the left and right sides of the test bench 8, and the two connecting frames 27 are correspondingly slidably mounted in the two guide slots 30.

[0023] Working principle and use process of the test device in the present invention:

[0024] Before the test, one end of a section of wire and cable to be tested is passed through three test rings 10 in sequence, and then both ends are clamped by the clamping mechanism respectively; the clamping process is as follows: the wire and cable to be tested passes through the lower guide cable roller 13 and then moves downward and passes through the lower clamping seat 20 and the upper clamping seat 21, and then the pressing seat 17 is pressed downward to make the upper guide cable roller 14 contact the wire and cable to be tested, and then the fixed card block 19 is flipped to make it fit into the fixed card slot 18, and then the upper clamping seat 21 is pressed down and the clamping nut 23 is screwed to make the upper clamping seat 21 properly clamp the wire and cable to be tested.

[0025] During the test, the drive motor 25 is started to drive the cam 24 to rotate unidirectionally at a constant speed. In conjunction with the spring 29, the connecting frame 27 drives the two sets of clamping mechanisms to slide back and forth synchronously, so that the wires and cables to be tested are rubbed back and forth in the test ring 10 to simulate the state during use. After the number of tests reaches the requirement, the wires and cables are removed to observe whether the wires and cables meet the requirements.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An aerospace wire and cable, characterized in that: include: A cable core (1), an insulating layer (2) covering the outside of the cable core (1) in sequence from the inside to the outside, a shielding layer (3), an inner sheath (4), a flame retardant layer (5), an outer sheath (6), and a wear-resistant protective layer (7).

2. A mechanical property testing device for aerospace wires and cables, characterized in that: A test device for testing aerospace wires and cables as claimed in claim 1, comprising a test bench (8), a test mechanism arranged on the test bench (8), and two groups of clamping mechanisms located on the left and right sides of the test mechanism, wherein the test mechanism comprises a vertical plate (9) arranged on the test bench (8), and a plurality of test rings (10) arranged side by side on the front side of the vertical plate (9), and the two groups of clamping mechanisms each comprise a bottom plate (11), a first clamping assembly and a second clamping assembly arranged on the bottom plate (11), the first clamping assembly being close to the test mechanism, and the bottom plate (11) sliding in the left and right directions, and a reciprocating drive mechanism connected to two bottom plates (11) in the two groups of clamping mechanisms is arranged at the bottom of the test bench (8).

3. The mechanical property testing device for aerospace wires and cables according to claim 2, characterized in that: A plurality of test rings (10) are distributed in sequence along the left-right direction, and their central axes are collinear.

4. The mechanical property testing device for aerospace wires and cables according to claim 2, characterized in that: Friction surfaces (12) for simulating different friction environments are correspondingly arranged on the inner ring walls of a plurality of test rings (10).

5. The mechanical property testing device for aerospace wires and cables according to claim 2, characterized in that: The first clamping assembly comprises a lower cable guide roller (13) and an upper cable guide roller (14) which are arranged side by side and staggered up and down, the lower cable guide roller (13) being mounted on the base plate (11) via a fixing frame (15), the base plate (11) being provided with two pressing guide rods (16) which are arranged front and back, a pressing seat (17) being slidably mounted on the two pressing guide rods (16), and the upper cable guide roller (14) being connected to the pressing seat (17).

6. The mechanical property testing device for aerospace wires and cables according to claim 5, characterized in that: A plurality of fixed slots (18) are equidistantly distributed along the vertical direction on the front rod wall of the front pressing guide rod (16) and on the rear rod wall of the rear pressing guide rod (16). Fixed blocks (19) that can cooperate with the fixed slots (18) are rotatably mounted on the front and rear side edges of the pressing seat (17).

7. The mechanical property testing device for aerospace wires and cables according to claim 2, characterized in that: The second clamping assembly comprises a lower clamping seat (20) arranged on the base plate (11), an upper clamping seat (21) located above the lower clamping seat (20), and two clamping threaded rods (22) located on the front and rear sides of the upper clamping seat (21), the front and rear sides of the upper clamping seat (21) are correspondingly slidably mounted on the two clamping threaded rods (22), and two clamping nuts (23) are correspondingly arranged on the two clamping threaded rods (22), and the two clamping nuts (23) are in contact with the upper end surfaces of the front and rear sides of the upper clamping seat (21).

8. The mechanical property testing device for aerospace wires and cables according to claim 2, characterized in that: The reciprocating drive mechanism comprises a cam (24) arranged inside the test bench (8), a drive motor (25) arranged outside the test bench (8) and connected to the cam (24), two action plates (26) located on the left and right sides of the cam (24) and abutting against the cam (24), and two connecting frames (27) connected between the two action plates (26) and the two bottom plates (11) in the two sets of clamping mechanisms.

9. The mechanical property testing device for aerospace wires and cables according to claim 8, characterized in that: A mounting plate (28) is provided at the middle position of the inner top of the test bench (8), and the mounting plates (28) are distributed along the front and rear. Springs (29) are connected between the left and right side surfaces of the mounting plates (28) and the upper ends of the two action plates (26).

10. The mechanical property testing device for aerospace wires and cables according to claim 8, characterized in that: Two guide slots (30) are provided on the left and right sides of the test bench (8), and the two connecting frames (27) are correspondingly slidably mounted in the two guide slots (30).

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