High and low temperature resistant signal cable

Abstract

This application discloses a high and low temperature resistant signal cable, relating to the field of cable technology. It includes a conductor, and the outer wall of the conductor is provided with an active heat dissipation and anti-bending mechanism. This application utilizes thermally conductive silicone grease to introduce the heat of the conductor into a phase change material through metal fiber bundles. Thus, the latent heat of the phase change material is stored in the phase change material during the process of solid-to-liquid transformation. Based on the fluidity of the liquid phase change material, the heat in the high-temperature area is transferred to the low-temperature area. Therefore, compared with the active heat absorption of heat dissipation materials, it has a better ability to store heat and reduce the heat of the conductor, thereby managing the heat generated by the conductor in a regional manner and avoiding excessive local heat.

Description

Technical Field

[0001] This application relates to the field of cable technology, and in particular to a high and low temperature resistant signal cable. Background Technology

[0002] Signal cables are cables specifically designed for transmitting electrical signals (non-electrical signals). The core requirements are fidelity and interference resistance.

[0003] Currently, as disclosed in publication number CN222168014U, a high and low temperature resistant signal cable includes an outer sheath and a signal cable; the outer sheath is a silicone layer; the signal cable is provided with a first conductor, a first insulation layer, a first shielding layer, a second shielding layer, and an isolation layer from the inside out; the first insulation layer is an FEP plastic layer; and the isolation layer is a Mylar plastic layer.

[0004] However, the silicone / FEP insulation layer used in this signal cable can only withstand 200℃, and it lacks active heat dissipation and a structure to disperse and transfer heat. As a result, when the internal temperature of the cable rises, the heat distribution is uneven, causing some areas to concentrate heat and continue to rise. When the temperature exceeds 250℃, the insulation layer used in this cable will carbonize and be broken down by the heat, resulting in heat imbalance and cable damage. Utility Model Content

[0005] To address the issue of thermal management failure, this application provides a high and low temperature resistant signal cable.

[0006] The high and low temperature resistant signal cable provided in this application adopts the following technical solution:

[0007] A high and low temperature resistant signal cable includes a conductor, and the outer wall of the conductor is provided with an active heat dissipation and anti-bending mechanism;

[0008] The active heat dissipation and anti-bending mechanism includes an annular skeleton disposed on the outer wall of the conductor. The outer wall of the annular skeleton is provided with a capillary tube for storing phase change material. The inner wall of the phase change material is fixedly provided with a metal fiber bundle. The outer wall of the conductor is provided with thermally conductive silicone grease.

[0009] By adopting the above technical solution, the heat is actively absorbed and stored as latent heat and balanced when the conductor is heated by the heat shrinking and fastening of the ring skeleton and the heat conduction of the metal fiber bundle. When the conductor is at low temperature, the phase change material solidifies to protect the heat and prevent the temperature from dropping further.

[0010] Preferably, the active heat dissipation and anti-bending mechanism further includes an etched groove on the outer wall of the capillary, and the annular skeleton is fitted onto the outer wall of the conductor and maintains a distance from the conductor.

[0011] By adopting the above technical solution, the ring skeleton shrinks due to heating and thus loops around the outer wall of the conductor, thereby fixing the conductor and driving the capillary guide to approach the outer wall of the conductor.

[0012] Preferably, the capillary is fixedly connected to the side of the annular skeleton away from the conductor, and a metal fiber bundle is fixedly passed through the sidewall of the capillary. The two ends of the metal fiber bundle extend 1 mm out of the capillary and pierce the conductor's twisted seam.

[0013] By adopting the above technical solution, the annular skeleton sidewall groove limits the capillary, thereby constraining the movement of the capillary.

[0014] Preferably, the metal fiber bundle is fixedly connected to the thermally conductive silicone grease, and the outer wall of the annular skeleton is fitted with an insulating layer.

[0015] By adopting the above technical solution, the insulation layer is fixed to the outer wall of the capillary through the etched grooves on the inner wall, thereby reducing the cable diameter while improving the insulation effect.

[0016] Preferably, the inner wall of the insulating layer is provided with an etched groove, and a conductive copper strip is fixedly connected to the outer wall of the insulating layer.

[0017] By adopting the above technical solution, the insulating layer prevents the conductive copper strip from affecting the heat absorption of the capillary during electromagnetic flow.

[0018] Preferably, the outer wall of the conductive copper strip is fitted with a woven copper mesh, and the outer wall of the woven copper mesh is fitted with a sheath layer.

[0019] By adopting the above technical solution, the woven copper mesh and the sheath layer together form a shielding layer, thereby shielding against external interference.

[0020] Preferably, the inner wall of the sheath layer is provided with an annular corrugated groove, and the thermally conductive silicone grease is filled in the gaps of the conductor sidewall.

[0021] By adopting the above technical solution, heat is transferred by conducting the heat generated by the conductor to the metal fiber bundle through thermal grease.

[0022] Preferably, an adhesive is fixedly connected to the inner wall of the insulating layer, and conductive glue is fixedly connected between the conductive copper strip and the woven copper mesh.

[0023] By adopting the above technical solution, the connection between the woven copper mesh and the conductive copper strip is strengthened by conductive adhesive, thereby enhancing the stability of the machinery.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By using thermally conductive silicone grease to transfer the heat of the conductor into the phase change material through metal fiber bundles, the latent heat of the phase change material is stored in the phase change material during the solid-to-liquid transition process. The heat in the high-temperature zone is then transferred to the low-temperature zone based on the fluidity of the liquid phase change material. Compared with the active heat absorption of heat dissipation materials, this method has a better ability to store heat and reduce the heat of the conductor, thereby managing the heat generated by the conductor in different areas and avoiding excessive local heat.

[0026] 2. By using a combination of a ring skeleton and capillary tubes, the radius of the cable is reduced, and it has better bending resistance and protection compared to the multi-layer isolation of Mylar and braided layers. For example, when used in the joints of robotic arms, it will have a longer service life and performance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this application;

[0028] Figure 2 This is a schematic diagram showing the splitting of the sheath layer in this application;

[0029] Figure 3 This is a schematic diagram showing the disassembly of the braided copper mesh in this application;

[0030] Figure 4 This is a schematic diagram showing the disassembly of the conductive copper strip in this application;

[0031] Figure 5 This is a schematic diagram showing the separation of the insulating layer in this application;

[0032] Figure 6 This is a partial schematic diagram of the capillary section of this application;

[0033] Figure 7 This is a side cross-sectional view of the metal fiber bundle in this application;

[0034] Figure 8 This is a cross-sectional schematic diagram of this application;

[0035] Figure 9 For the purposes of this application Figure 8 A magnified view of a portion of point A in the middle.

[0036] Figure label:

[0037] 1. Conductor;

[0038] 2. Active heat dissipation and bending resistance mechanism; 21. Ring frame; 22. Capillary tube; 23. Etched groove one; 24. Phase change material; 25. Metal fiber bundle; 26. Insulation layer;

[0039] 27. Etched trench II; 28. Conductive copper strip; 29. ​​Braided copper mesh; 210. Sheath layer; 211. Annular corrugated groove; 212. Thermal grease; 213. Adhesive; 214. Conductive adhesive. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail.

[0041] This application discloses a high and low temperature resistant signal cable.

[0042] Reference Figures 1-5 A high and low temperature resistant signal cable includes a conductor 1, which is made of multiple strands of annealed copper wire spirally twisted together and nickel-plated on the surface to resist oxidation, reduce contact resistance, and improve transmission efficiency. An active heat dissipation and anti-bending mechanism 2 is provided on the outer wall of the conductor 1. The active heat dissipation and anti-bending mechanism 2 also includes an etched groove 23 formed on the outer wall of a capillary tube 22. The diameter of an annular frame 21 is larger than the outer diameter of the conductor 1, and slots are formed on the side wall of the annular frame 21. The diameter of the slots is equal to the radius of the capillary tube 22 + ... The diameter of the ring skeleton 21 is 0.1 mm, which facilitates the interference fit between the ring skeleton 21 and the capillary tube 22, thereby fixing the ring skeleton 21 and the capillary tube 22. The phase change material 24 is filled inside the etched groove 23. The phase change material 24 is made of paraffin / metal alloy material, which has good heat capacity and phase change characteristics. The metal fiber bundle 25 is inserted into the inner wall of the phase change material 24. The inner wall of the etched groove 23 is welded to the metal fiber bundle 25. The metal fiber bundle 25 is fixedly inserted through the side wall of the etched groove 23 and extends 1 mm from the tube end into the thermally conductive silicone grease 212 of the conductor 1, which facilitates heat transfer. The inner wall of the insulating layer 26 is attached to the outer wall of the ring skeleton 21. The insulating layer 26 is made of ceramicized silicone rubber, which has a temperature resistance of 300℃.

[0043] First, the workers welded and fixed the metal fiber bundle 25 to the etched trench 23. Then, they filled the etched trench 23 with phase change material 24. Next, they fixed the etched trench 23 to the annular skeleton 21. Then, they fitted the annular skeleton 21 onto the outer wall of the conductor 1. Then, they filled the gaps in the conductor 1 with thermal grease 212, making the thermal grease 212 contact the surface of the etched trench 23. Then, they heated the annular skeleton 21, which contracted due to the heat and thus adhered to the surface of the conductor 1, thereby completing the internal structural connection.

[0044] Reference Figures 6-9The second etched groove 27 is non-penetratingly formed on the inner wall of the insulating layer 26. The second etched groove 27 adopts a cross-shaped grid pattern, which makes the connection more stable. By applying adhesive 213 to the inner wall of the insulating layer 26, the second etched groove 27 is bonded to the phase change material 24, thereby fixing the insulating layer 26 and the first etched groove 23. The outer wall of the insulating layer 26 is bonded to the outer wall of the conductive copper strip 28 by heating and pressing with hot melt adhesive. The woven copper mesh 29 is sleeved on the outer wall of the conductive copper strip 28. The ends of the braided copper mesh 29 are welded to the conductive copper strip 28. The entire braided copper mesh 29 is bonded to the outer wall of the insulating layer 26 by applying conductive adhesive 214. The conductive adhesive 214 is made of epoxy resin. The sheath layer 210 is fitted onto the outer wall of the braided copper mesh 29. The sheath layer 210 is made of rubber. Annular corrugated grooves 211 are equidistantly opened on the inner wall of the sheath layer 210 to increase the heat dissipation area. Thermal grease 212 is filled into the micro-air gaps on the side wall of the conductor 1 and directly contacts the etched groove 23 to improve the thermal conductivity.

[0045] When conductor 1 becomes too hot, the heat generated by conductor 1 will be transferred to the metal fiber bundle 25 through the thermal grease 212. The metal fiber bundle 25 will then transfer the heat to the phase change material 24. When heated, the phase change material 24 will change from a solid to a liquid state, thereby absorbing the heat and transferring the heat from the high-heat area to the low-heat area through the flow of the phase change material 24. By adjusting the proportion and type of phase change material 24, it is ensured that the signal cable can effectively conduct heat to the low-temperature area when overheating, avoiding local overheating and ensuring that the temperature of conductor 1 is controlled within a safe range. When the temperature is below 60°C, the phase change material 24 will solidify and expand to compensate for the shrinkage stress of the insulation layer 26 and prevent the insulation layer 26 from cracking when the temperature is below 60°C. This completes the high and low temperature protection and manages and regulates the internal heat. This signal cable is suitable for a variety of extreme working environments, can withstand temperature changes from -60°C to 300°C, and provides efficient thermal management. It is suitable for high-tech mechanical equipment fields that require strict temperature control of cables.

[0046] The implementation principle of the high and low temperature resistant signal cable in this application embodiment is as follows:

[0047] Workers weld and fix the metal fiber bundle 25 to the etched groove 23, fill the etched groove 23 with phase change material 24, fix the etched groove 23 to the annular skeleton 21, and then put the annular skeleton 21 on the outer wall of the conductor 1. Fill the gap of the conductor 1 with thermally conductive silicone grease 212 so that it contacts the surface of the etched groove 23. Heat the annular skeleton 21 to make it shrink and fit the conductor 1 to complete the internal connection. When the conductor 1 is overheated, the heat is transferred to the metal fiber bundle 25 through the thermally conductive silicone grease 212, and then to the phase change material 24. The phase change material 24 melts and flows when heated, transferring heat. When the temperature is above 60°C, it absorbs heat and cools down. When the temperature is below 60°C, it solidifies and expands, protecting the insulation layer 26 from cracking, thus realizing temperature control and high and low temperature protection.

[0048] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high and low temperature resistant signal cable, characterized in that: Includes a conductor (1), and the outer wall of the conductor (1) is provided with an active heat dissipation and anti-bending mechanism (2); The active heat dissipation and anti-bending mechanism (2) includes an annular skeleton (21) disposed on the outer wall of the conductor (1), the outer wall of the annular skeleton (21) is provided with a capillary tube (22) for storing phase change material (24), the inner wall of the phase change material (24) is fixedly provided with a metal fiber bundle (25), and the outer wall of the conductor (1) is provided with thermal grease (212).

2. The high and low temperature resistant signal cable according to claim 1, characterized in that: The active heat dissipation and anti-bending mechanism (2) also includes an etched groove (23) on the outer wall of the capillary (22), and the annular skeleton (21) is fitted on the outer wall of the conductor (1) and maintains a distance from the conductor (1).

3. The high and low temperature resistant signal cable according to claim 2, characterized in that: The capillary (22) is fixedly connected to the side of the annular skeleton (21) away from the conductor (1). A metal fiber bundle (25) is fixedly passed through the side wall of the capillary (22). The two ends of the metal fiber bundle (25) extend 1 mm out of the capillary and pierce the slit of the conductor (1).

4. The high and low temperature resistant signal cable according to claim 3, characterized in that: The metal fiber bundle (25) is fixedly connected to the thermal grease (212), and the outer wall of the annular skeleton (21) is covered with an insulating layer (26).

5. A high and low temperature resistant signal cable according to claim 4, characterized in that: The inner wall of the insulating layer (26) is provided with an etched groove (27), and the outer wall of the insulating layer (26) is fixedly connected with a conductive copper strip (28).

6. The high and low temperature resistant signal cable according to claim 5, characterized in that: The outer wall of the conductive copper strip (28) is covered with a woven copper mesh (29), and the outer wall of the woven copper mesh (29) is covered with a sheath layer (210).

7. A high and low temperature resistant signal cable according to claim 6, characterized in that: The inner wall of the sheath layer (210) is provided with an annular corrugated groove (211), and the thermal grease (212) is filled in the gap of the side wall of the conductor (1).

8. A high and low temperature resistant signal cable according to claim 7, characterized in that: An adhesive (213) is fixedly connected to the inner wall of the insulating layer (26), and a conductive adhesive (214) is fixedly connected between the conductive copper strip (28) and the woven copper mesh (29).

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