A compression-resistant flame-retardant flexible composite cable

Abstract

The present invention discloses a pressure-resistant flame-retardant flexible composite cable, including an outer skin and a core group located on the axis of the outer skin, and a flame-retardant insulating layer is filled between the two. The cable also includes a deformation mechanism, which cooperates with the flexible bending of the cable through its own folding or elastic deformation, and the deformation mechanism includes a buffer mechanism, wherein the buffer mechanism relieves the impact force on the cable by squeezing and deforming the outer skin toward the deformation mechanism. The pressure-resistant flame-retardant flexible composite cable is innovatively designed to improve the pressure resistance performance around the external insulation layer, and by improving the overall external form of the cable, using grooves and cooperating with the design of the buffer mechanism, it can meet the requirements of the cable's pressure resistance and flexible bendability in special environments as much as possible, and can also use the above improvements to assist in improving the cable's own cooling effect.

Description

Technical Field

[0001] The present invention relates to the field of cable technology, in particular to a flexible flame-retardant cable used in the smart grid industry, specifically to a compression-resistant flame-retardant flexible composite cable. Background Art

[0002] As a basic core equipment for carrying power transmission, the cable needs to have good flame retardant properties on the basis of ensuring transmission efficiency. At the same time, in order to cope with special use conditions, it should also be able to be flexibly bent within a certain range and have a certain pressure resistance effect. For example, in the prior art, there is a pressure-resistant flexible cable with announcement number CN108198654B, which integrates an electric input unit and an electric feedback unit. Only a single cable is needed to achieve electrical interaction, and it is beneficial to the bending part to interlace the two electric input units, avoiding the larger electric coupling effect when it is completely straight. The use of the electric coupling shielding layer can further prevent the occurrence of internal or external electric coupling, and even if the feedback signal is small, the feedback signal can be transmitted relatively well. In addition, when pressure is applied to the curved part, the curved part can use an elastic body to resist tension to prevent damage to the internal feedback line. At the same time, when the straight part is under pressure, the straight part is prevented from being pressed into the cable due to the pulling force of the curved part.

[0003] Or the prior art has a publication number of CN106558357B, which is a pressure-resistant flexible cable, comprising an electric transmission unit, an optical transmission unit, a support, two elastic bodies, and a multi-layer protective layer coated on the electric transmission unit, the optical transmission unit, the support, and the elastic body, wherein the cross-section of the multi-layer protective layer is an ellipse, the support extends along the short axis of the ellipse and supports the two elastic bodies, the two elastic bodies are symmetrically distributed about the long axis of the ellipse, and contact the multi-layer protective layer, the electric transmission unit and the optical transmission unit are respectively arranged on both sides of the support, and are symmetrically distributed along the long axis of the ellipse, the electric transmission unit and the optical transmission unit do not contact the multi-layer protective layer and the support, and wherein the elastic modulus of the elastomer is less than the elastic modulus of the support;

[0004] The above-mentioned existing technologies are very good in improving the compressive resistance or the flexible bending effect, and some technologies are suitable for use in actual production. However, there are still certain shortcomings. After improving one of the compressive resistance or the flexible bending ability, the other standard will be affected accordingly. There are great limitations, so it is necessary to improve the design again. Summary of the invention

[0005] The purpose of the present invention is to provide a pressure-resistant flame-retardant flexible composite cable to solve the problem that the existing technologies in the above-mentioned background technology are very excellent in improving the pressure resistance or improving the flexible bending effect, and some technologies are suitable for use in actual production, but there are still certain shortcomings. After improving one of the standards of pressure resistance or flexible bending ability, the other standard will be affected accordingly, and the limitations are relatively large, so it is necessary to improve the design again.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: comprising an outer sheath and a wire core group located on the axis of the outer sheath, and a flame-retardant insulation layer is filled between the two, the cable also includes a deformation mechanism, which cooperates with the flexible bending of the cable through its own folding or elastic deformation, and at the same time, the deformation mechanism includes a buffer mechanism, wherein the buffer mechanism alleviates the impact force on the cable by squeezing and deforming the outer sheath toward the deformation mechanism.

[0007] As a further feature, the buffer mechanism comprises grooves formed on the outer skin and the flame-retardant insulating layer, wherein the grooves are distributed in an annular shape and the cross-section of the bottom wall of the grooves is an arc-shaped structure.

[0008] As a further feature, the buffer mechanism includes a planar portion located at the top end of the groove side wall, and the planar portion is also formed on the outer skin.

[0009] As a further feature, a U-shaped structure is formed on the same cross section as the groove.

[0010] As a further feature, the buffer mechanism includes a deformation groove located at the side of the groove, and the cross-section of the deformation groove is a trapezoidal structure.

[0011] Furthermore, the buffer mechanism also includes a channel distributed parallel to the axis of the cable body, wherein the channel runs through the buffer mechanism and the two ends of the channel are respectively connected to the two grooves.

[0012] As a further feature, the opening of the groove is covered with an elastic layer, wherein the side of the elastic layer is sealed and connected to the surface of the outer skin.

[0013] As a further feature, a memory alloy wire is disposed on the lower surface of the elastic layer.

[0014] As a further feature, the cable also includes a heat-conducting mechanism, wherein the heat-conducting mechanism is installed through the outer skin and the bottom is installed in the insulating layer without penetrating.

[0015] Furthermore, the heat conducting mechanism conducts the heat near the wire core group to the groove and the outside of the outer skin through non-contact heat exchange.

[0016] As a further feature, the heat conduction mechanism includes a fixed part and a movable part made of metal material.

[0017] As a further feature, the fixed portion is installed in the flame-retardant insulating layer and its top end extends into the inside of the groove, while the movable portion is slidably installed inside the fixed portion.

[0018] As a further feature, the movable portion is a cylindrical structure with an opening at the top, and the opening at the top of the movable portion passes through the elastic layer and is in communication with the outside.

[0019] As a further feature, an irregularly shaped air hole is provided at the bottom end of the movable portion.

[0020] The beneficial effects of the present invention are: an innovative design focusing on improving the compressive performance is carried out around the external insulating layer, and by improving the overall external form of the cable, the requirements of the compressive resistance and flexible bendability of the cable in special environments can be met as much as possible, and the above improvements can also be used to assist in improving the cooling effect of the cable itself, as shown in the following content.

[0021] 1. The structural design of the groove can utilize the annular multi-section concave area formed on the cable to form a number of deformation nodes that can cooperate with the bending of the cable, thereby ensuring its flexibility. At the same time, the buffer mechanism formed by the plane part or the deformation groove can improve the overall force unloading and compression resistance of the cable by guiding the deformation direction of the outer skin;

[0022] Furthermore, the structural design of the channel, on the one hand, can utilize the honeycomb-like multi-cavity structure formed inside the cable skin to achieve a better force unloading and buffering effect; on the other hand, it can utilize the structural design of the elastic layer that can deform according to temperature and the deformation pressure change guidance to achieve the guided flow of external air or refrigerant medium, thereby achieving a better auxiliary cooling effect and being more energy-saving and environmentally friendly.

[0023] 2. The structural design of the fixed part and the movable part, on the one hand, can utilize their synchronous movement in the process of following the deformation of the elastic layer to increase the contact area between the heat conduction mechanism and the air or cold medium in the groove; on the other hand, it can utilize the fanning effect generated by the movement of the special-shaped hole structure at the bottom of the movable part to promote the air flow rate inside the fixed part, and enhance the ventilation effect between the fixed part and the outside through the movable part with the same hollow structure, thereby better improving the overall cooling effect of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0025] Figure 2 It is a schematic diagram of the planar structure of the present invention;

[0026] Figure 3This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0027] Figure 4 This is a schematic diagram of the deformation groove distribution structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the cross-sectional distribution structure of the deformation groove of the present invention;

[0029] Figure 6 This is a schematic diagram of the channel distribution structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the elastic layer structure of Embodiment 3 of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the elastic layer after expansion of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of a cross-section of a fourth embodiment of the elastic layer of the present invention;

[0033] Fig.10 This is a structural diagram of Embodiment 4 of the present invention;

[0034] Fig.11 This is a schematic diagram of the fixed part distribution structure of the present invention;

[0035] Fig.12 It is a schematic diagram of the cross-sectional structure of the active part of the present invention.

[0036] In the figure: 1, outer skin; 2, wire core group; 3, flame retardant insulation layer; 4, groove; 5, plane part; 6, deformation groove; 7, channel; 8, elastic layer; 9, air hole; 10, fixed part; 11, movable part. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-Figure 12 , the present invention provides the following technical solutions:

[0039] Embodiment 1: In this embodiment, in order to solve the problem that the cable has poor flexibility and is prone to breakage and fine lines after repeated bending in the prior art, a Figure 1-Figure 2The scheme shown includes an outer sheath 1 and a wire core group 2 located on the axis of the outer sheath 1, and a flame-retardant insulating layer 3 is filled between the two. The cable also includes a deformation mechanism, which cooperates with the flexible bending of the cable through its own folding or elastic deformation. At the same time, the deformation mechanism includes a buffer mechanism, wherein the buffer mechanism relieves the impact force on the cable by squeezing and deforming the outer sheath 1 toward the deformation mechanism. The buffer mechanism includes a groove 4 formed on the outer sheath 1 and the flame-retardant insulating layer 3, wherein the groove 4 is annularly distributed, and the bottom wall cross-section of the groove 4 is an arc-shaped structure. The buffer mechanism includes a planar portion 5 located at the top of the side wall of the groove 4, and the planar portion 5 is also formed on the outer sheath 1 and is aligned with the groove 4 forms a U-shaped structure on the same cross section. When the cable is in a bent state, how the internal core group 2 resists the tensile fracture caused by bending is not discussed for the time being. During the bending process of the cable as a whole, the arc-shaped area of ​​the bottom wall of the groove 4 will expand and deform around the center of the bottom wall through its two wing areas to cooperate with the smooth deformation of the bending part of the cable itself. At the same time, since the plane part 5 is set on the side of the groove 4, when the outer surface of the outer skin 1 is squeezed by force, the plane part 5 will serve as a force-bearing area to guide the deformation direction of the outer skin 1 to effectively reduce the impact of the impact force on the internal core group 2. At the same time, the plane part 5 can be set to an inclined distribution state, so as to achieve a better buffering and protection effect.

[0040] Embodiment 2: This embodiment discloses another solution, the difference of which is mainly reflected in the difference of the buffer mechanism. Figure 3-5 As shown, the buffer mechanism includes a deformation groove 6 located on the side of the groove 4, and the cross-section of the deformation groove 6 is a trapezoidal structure. The buffer mechanism also includes a channel 7 distributed parallel to the axis of the cable body, wherein the channel 7 runs through the buffer mechanism and is connected to the two grooves 4 at both ends. Compared with the planar buffer mechanism in Example 1, the buffer mechanism in this embodiment is composed of a plurality of groups of trapezoidal deformation grooves 6 with a planar structure, which has more dimensions of the outer skin 1 deformation guide direction, and has a better buffering effect. At the same time, on the basis of this scheme, a channel 7 structure is added after the cable outer skin 1 is formed, which is formed by secondary processing with a puncture device or other means. A number of channels 7 distributed at equal angles make the outer skin 1 form a honeycomb cylindrical elastic structure, so the buffering effect is also better, which significantly improves the compressive performance of the cable.

[0041] Embodiment 3: The solution disclosed in this embodiment is further disclosed on the basis of the above embodiment, and the effect to be achieved is to use the former several pressure-resistant structures to achieve a better air circulation effect, thereby assisting the cable itself in cooling down. Specifically, Figure 7 and Figure 8As shown, the opening of the groove 4 is covered with an elastic layer 8, wherein the side of the elastic layer 8 is sealed and connected to the surface of the outer skin 1, and the lower surface of the elastic layer 8 is also fitted with a memory alloy wire. In this case, the channel 7 at the end of the cable can be set to an open state. The specific setting method is to cut off the elastic layer 8 at the end of the cable, or when the elastic layer 8 is a post-installed structure, the elastic layer 8 is not installed at the end position, so that the channel 7 at the end is connected with the outside or the cold medium container. When a certain section of the cable has a large temperature change, the memory alloy wire that is deformed by heating or cooling will guide the elastic layer 8 to deform at the same time. The elastic layer 8 in the normal state is close to but not fitted with the groove 4. The elastic layer 8 in the heated state moves in the direction away from the groove 4. Therefore, the negative pressure effect generated will guide the air or cold medium elsewhere to flow into the groove 4 of the corresponding section, and the elastic layer 8 returns to the initial position after the temperature drops, thereby achieving the purpose of auxiliary cooling of the cable itself by using the buffer and deformation mechanism.

[0042] Embodiment 4: The solution disclosed in this embodiment is mainly to further improve the cooling effect, and its main means are as follows: Figure 9-12 As shown, the cable also includes a heat-conducting mechanism, wherein the heat-conducting mechanism is installed through the outer skin 1 and the bottom is installed in the insulating layer 3 without penetrating. The heat-conducting mechanism conducts the heat near the core group 2 to the groove 4 and the outside of the outer skin 1 through non-contact heat exchange. The heat-conducting mechanism includes a fixed part 10 and a movable part 11 made of a metal material, wherein the fixed part 10 is installed in the flame-retardant insulating layer 3 and the top extends to the inside of the groove 4, and the movable part 11 is slidably installed in the inside of the fixed part 10. The movable part 11 is a cylindrical structure with an open top, and the top opening of the movable part 11 passes through the elastic layer 8 and is connected to the outside. The movable part 11 is connected, and an irregular-shaped air hole 9 is provided at the bottom end of the movable part 11. When the elastic layer 8 is deformed, the movable part 11 will be guided to move synchronously in the fixed part 10. Therefore, the flowing refrigerant or air will fully contact and exchange heat with the movable part 11 and the heat-conducting mechanism as a whole, so as to indirectly reduce the core temperature of the wire core group 2. At the same time, in the process of repeated movement of the movable part 11, the irregular-shaped air hole 9 at its bottom will accelerate the heat exchange between the fixed part 10 and the external air, thereby further improving the overall heat exchange and cooling effect of the cable, thereby ensuring the continuous working performance of the cable.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure-resistant flame-retardant flexible composite cable, comprising an outer sheath (1) and a wire core group (2) located on the axis of the outer sheath (1), and a flame-retardant insulating layer (3) is filled between the two, characterized in that: The cable also includes a deformation mechanism, which cooperates with the flexible bending of the cable through its own folding or elastic deformation, and the deformation mechanism also includes a buffer mechanism, wherein the buffer mechanism relieves the impact force on the cable by squeezing and deforming the outer skin (1) toward the deformation mechanism; The buffer mechanism comprises a groove (4) formed on the outer skin (1) and the flame-retardant insulating layer (3); The buffer mechanism also includes a channel (7) distributed parallel to the axis of the cable body, wherein the channel (7) passes through the buffer mechanism and has two ends respectively connected to the two grooves (4); The opening of the groove (4) is covered with an elastic layer (8), wherein the side of the elastic layer (8) is sealed and connected to the surface of the outer skin (1), and the lower surface of the elastic layer (8) is also fitted with a memory alloy wire.

2. The compression-resistant flame-retardant flexible composite cable according to claim 1, characterized in that: The groove (4) is distributed in an annular shape, and the cross section of the bottom wall of the groove (4) is an arc-shaped structure.

3. The compression-resistant flame-retardant flexible composite cable according to claim 2, characterized in that: The buffer mechanism comprises a plane portion (5) located at the top end of the side wall of the groove (4); the plane portion (5) is also formed on the outer skin (1) to form a U-shaped structure on the same cross section as the groove (4).

4. The compression-resistant flame-retardant flexible composite cable according to claim 2, characterized in that: The buffer mechanism comprises a deformation groove (6) located on the side of the groove (4); the cross section of the deformation groove (6) is a trapezoidal structure.

5. The compression-resistant flame-retardant flexible composite cable according to claim 4, characterized in that: The cable also includes a heat-conducting mechanism, wherein the heat-conducting mechanism is installed through the outer skin (1) and installed in the insulating layer (3) at the bottom without penetrating the outer skin. The heat-conducting mechanism conducts heat near the wire core group (2) to the groove (4) and the outside of the outer skin (1) through non-contact heat exchange.

6. The compression-resistant flame-retardant flexible composite cable according to claim 5, characterized in that: The heat conduction mechanism comprises a fixed part (10) and a movable part (11) made of metal material, wherein the fixed part (10) is installed in the flame-retardant insulating layer (3) and the top end extends into the inside of the groove (4), while the movable part (11) is slidably installed inside the fixed part (10).

7. The compression-resistant flame-retardant flexible composite cable according to claim 6, characterized in that: The movable part (11) is a cylindrical structure with an opening at the top. The top opening of the movable part (11) passes through the elastic layer (8) and communicates with the outside. Meanwhile, an irregularly shaped air hole (9) is provided at the bottom end of the movable part (11).

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