Bending-resistant flexible cable

Abstract

The invention discloses an anti-bending flexible cable, which comprises an outer protection assembly and a plurality of cables, and the plurality of cables are arranged in the outer protection assembly. The cable comprises a plurality of cable cores, and a wear-resistant layer, an anti-corrosion layer, a flame-retardant layer, a shielding layer and a filling layer which are arranged in sequence; the plurality of cable cores are arranged in the filling layer; the cable further comprises a toughening support, the toughening support is arranged in the filling layer, the toughening support comprises a toughening outer pipe and a toughening inner pipe, and the toughening inner pipe is arranged in the toughening outer pipe. By arranging the toughening bracket, the bending resistance of the whole cable can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and particularly relates to a bend-resistant flexible cable. Background Art

[0002] With the rapid growth of China's national economy, especially the acceleration of the construction and renovation of rural and urban power grids and the booming development of the real estate industry in various regions, China's power industry has developed rapidly, thus promoting the electrical industry supporting the power industry, especially the development of the wire and cable industry. The variety development of wire and cables shows a diversified trend. Wire and cables have developed from simple power transmission to multi-functionalization, that is, some new characteristics have been added according to different uses, such as: flame-retardant cables, fire-resistant cables, low-halogen and low-smoke cables, halogen-free and low-smoke cables, etc.

[0003] Currently, most cables are erected in the air or installed underground or underwater for telecommunications or power transmission. When installing cables, they are generally installed in the foundation. When the foundation environment changes, it may cause pulling on the cable, making the cable possibly bend due to the force. Repeated bending of the cable may cause damage to the cable, not only causing the power supply equipment to fail to work properly, but also seriously affecting the service life of the cable and increasing the use cost to a certain extent. Summary of the Invention

[0004] The problem to be solved by the present invention is: to provide a bend-resistant flexible cable, which can effectively improve the overall bend-resistant performance of the cable by setting a toughening bracket.

[0005] The technical solution provided by the present invention to solve the above problems is: a bend-resistant flexible cable, including an outer protection component and a plurality of cables. The plurality of cables are arranged inside the outer protection component; each cable includes a plurality of cable cores and a wear-resistant layer, an anti-corrosion layer, a flame-retardant layer, a shielding layer, and a filling layer arranged in sequence;

[0006] The plurality of cable cores are arranged inside the filling layer;

[0007] Each cable further includes a toughening bracket, the toughening bracket is arranged inside the filling layer, the toughening bracket includes a toughening outer tube and a toughening inner tube, and the toughening inner tube is arranged inside the toughening outer tube.

[0008] Preferably, the toughening bracket further includes a plurality of connecting rods. One end of each connecting rod is connected to the inner wall of the toughening outer tube, and the other end is connected to the outer wall of the toughening inner tube.

[0009] Preferably, the toughening inner tube and the toughening outer tube are made of rubber material.

[0010] Preferably, the connecting rods are made of rubber material.

[0011] Preferably, the material of the anti-corrosion layer is polyurethane paint material.

[0012] Preferably, the material of the shielding layer is tinned copper wire material.

[0013] Preferably, the outer protection component includes an outer protective sleeve, an inner protection framework, a heat dissipation ring and a plurality of heat conduction columns. The inner protection framework is arranged inside the outer protective sleeve, and a plurality of the cables are arranged inside the inner protection framework. The inner protection framework is made of a metal material. The heat dissipation ring is sleeved on the outer protective sleeve. A plurality of mounting holes for the heat conduction columns to pass through are arranged on the outer protective sleeve. One end of the heat conduction column is connected to the inner protection framework, and the other end is connected to the heat dissipation ring.

[0014] Preferably, the inner protection framework includes a connection mechanism and a plurality of framework segments, and the plurality of framework segments are connected through the connection mechanism.

[0015] Preferably, the connection mechanism includes a connecting iron chain and two fixing rings. The two fixing rings are respectively arranged at the connection positions of adjacent two framework segments. The connecting iron chain is used to connect the two fixing rings. One end of the framework segment is provided with a frustum-shaped groove, and the other end is provided with a frustum-shaped protrusion adapted to the shape of the groove.

[0016] Preferably, the connection mechanism further includes a spring and a fixing block. One end of the framework segment is provided with a movable hole for installing the fixing block and a through hole for cooperating with the connecting iron chain. One of the two fixing rings is arranged on the movable block. One end of the spring is connected to the movable block, and the other end is connected to the bottom of the movable hole. A corrugated section is arranged at a position on the outer protective sleeve corresponding to the connection position of adjacent two framework segments. The corrugated section is in a contracted state under normal conditions and can be unfolded when stressed.

[0017] Compared with the prior art, the advantages of the present invention are as follows: by arranging the toughening bracket, the overall anti-bending performance of the cable can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0019] Figure 1 is a schematic diagram of the cable of the present invention;

[0020] Figure 2 is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 3 is a partial cross-sectional view of the present invention;

[0022] Figure 4 Yes Figure 3 It is an enlarged schematic view of part A in the figure.

[0023] Reference numerals in the drawings: 1, wear-resistant layer; 2, anti-corrosion layer; 3, flame-retardant layer; 4, shielding layer; 5, cable core; 6, filling layer; 7, toughened outer tube; 8, connecting rod; 9, toughened inner tube; 10, heat dissipation ring; 11, outer protective sleeve; 12, skeleton section; 13, cable; 14, corrugated section; 15, groove; 16, protruding platform; 17, connecting ring; 18, connecting iron chain; 19, fixing block; 20, spring; 21, moving hole. Detailed implementation mode

[0024] The following will, in conjunction with the drawings and embodiments, elaborate in detail on the implementation mode of the present invention, so as to fully understand how the present invention uses technical means to solve technical problems and achieve the realization process of technical effects and implement it accordingly.

[0025] In the description of the present invention, it should be noted that for orientation terms, if there are terms such as "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and position relationships indicated are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

[0026] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, if there are terms such as "assembly", "connection", "coupling", these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or connected through an intermediate medium, and can be internally connected and communicated between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0029] It should also be understood that the terms used in the description of the embodiments of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the description of the embodiments of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0030] Specific embodiments of the present invention are shown in the drawings. An anti-bending flexible cable includes an outer protection component and a plurality of cables 13, and the plurality of cables 13 are arranged inside the outer protection component; the cable 13 includes a plurality of cable cores 5 and a wear-resistant layer 1, an anti-corrosion layer 2, a flame-retardant layer 3, a shielding layer 4, and a filling layer 6 arranged in sequence;

[0031] The plurality of cable cores 5 are arranged inside the filling layer 6;

[0032] The cable 13 further includes a toughening bracket, the toughening bracket is arranged inside the filling layer 6, the toughening bracket includes a toughening outer tube 7 and a toughening inner tube 9, and the toughening inner tube 9 is arranged inside the toughening outer tube 7. In the above solution, by arranging the toughening bracket, the overall anti-bending performance of the cable can be effectively improved.

[0033] In this embodiment, specifically, the specific connection method between the toughening outer tube and the toughening inner tube is: the toughening bracket further includes a plurality of connecting rods 8, one end of each of the plurality of connecting rods 8 is connected to the inner wall of the toughening outer tube 7, and the other end is connected to the outer wall of the toughening inner tube 9. Further, the toughening inner tube 9 and the toughening outer tube 7 are made of rubber material. And, the connecting rod 8 is made of rubber material.

[0034] In this embodiment, the material of the anti-corrosion layer 2 is polyurethane paint material. And, the material of the shielding layer 4 is tinned copper wire material.

[0035] As is known to those skilled in the art, directly buried cables need to have better shear resistance and extrusion resistance. Therefore, as another embodiment of the present invention, the outer protection component includes an outer protection sleeve 11, an inner protection skeleton, a heat dissipation ring 10, and a plurality of heat conduction columns. The inner protection skeleton is arranged inside the outer protection sleeve 11, and a plurality of the cables 13 are arranged inside the inner protection skeleton. The inner protection skeleton is made of a metal material. The heat dissipation ring 10 is sleeved on the outer protection sleeve 11. A plurality of mounting holes for the heat conduction columns to pass through are arranged on the outer protection sleeve 11. One end of the heat conduction column is connected to the inner protection skeleton, and the other end is connected to the heat dissipation ring 10. Specifically, the inner protection skeleton includes a connection mechanism and a plurality of skeleton segments 12, and the plurality of skeleton segments 12 are connected by the connection mechanism.

[0036] In this embodiment, the connection mechanism includes a connection iron chain 18 and two fixing rings. The two fixing rings are respectively arranged at the connection of two adjacent skeleton segments 12. The connection iron chain 18 is used to connect the two fixing rings. One end of the skeleton segment 12 is provided with a frustum-shaped groove 15, and the other end is provided with a frustum-shaped protrusion 16 that is adapted to the shape of the groove 15. Among them, through the cooperation of the protrusion and the groove, the bending function of two adjacent skeleton segments can be realized, and at the same time, the connection of two adjacent skeleton segments can be well protected to prevent the connection from being damaged when being sheared.

[0037] Furthermore, the connection mechanism further includes a spring 20 and a fixing block 19. One end of the skeleton segment 12 is provided with a movable hole 21 for installing the fixing block 19 and a through hole for cooperating with the connection iron chain 18. One of the two fixing rings is arranged on the movable block. One end of the spring 20 is connected to the movable block, and the other end is connected to the bottom of the movable hole 21. A wrinkled section 14 is arranged at a position on the outer protection sleeve 11 corresponding to the connection of two adjacent skeleton segments 12. The wrinkled section 14 is in a contracted state under normal conditions and can be unfolded when being stressed. When the cable as a whole is subjected to an axial tensile force, the springs of the connection mechanism inside two adjacent skeleton segments are stretched, and at the same time, the corresponding wrinkled section is unfolded, effectively offsetting the tensile force and ensuring that the cables inside the skeleton segments are not affected.

[0038] In the above solution, the inner protection skeleton is formed by connecting multiple skeleton segments. The multiple skeleton segments are connected by a connecting mechanism, and the multiple skeleton segments can be bent at a certain angle, enabling the inner protection skeleton to be bent, better adapting to the laying route and improving the adaptability. Moreover, the skeleton segments are made of metal materials and are rod-shaped, capable of having very good shear resistance. Additionally, the skeleton segments made of metal materials have good heat conduction performance, and the heat generated by the cable passes through the skeleton segments made of metal materials. At the same time, when the inner protection skeleton is subjected to tensile force, the distance between the multiple skeleton segments can be adjusted to offset the tensile force, better protecting the branch cables inside the inner protection skeleton.

[0039] The above is only an illustration of the best embodiment of the present invention, but it should not be construed as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure allows for changes. All changes made within the scope of the protection of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. A bending-resistant flexible cable, comprising an outer protective component and a plurality of cables (13), wherein the plurality of cables (13) are arranged in the outer protective component; characterized in that: The cable (13) comprises a plurality of cable cores (5) and a wear-resistant layer (1), an anti-corrosion layer (2), a flame-retardant layer (3), a shielding layer (4), and a filling layer (6) which are arranged in sequence; A plurality of cable cores (5) are arranged in the filling layer (6); The cable (13) further comprises a toughening support, wherein the toughening support is arranged in the filling layer (6), and the toughening support comprises a toughening outer tube (7) and a toughening inner tube (9), wherein the toughening inner tube (9) is arranged inside the toughening outer tube (7).

2. The anti-bending flexible cable according to claim 1, characterized in that: The toughening bracket further comprises a plurality of connecting rods (8), one end of each of the connecting rods (8) being connected to the inner wall of the toughening outer tube (7) and the other end being connected to the outer wall of the toughening inner tube (9).

3. The anti-bending flexible cable according to claim 1, characterized in that: The toughened inner tube (9) and the toughened outer tube (7) are made of rubber material.

4. The anti-bending flexible cable according to claim 2, characterized in that: The connecting rod (8) is made of rubber material.

5. The anti-bending flexible cable according to claim 1, characterized in that: The material of the anti-corrosion layer (2) is polyurethane paint material.

6. The anti-bending flexible cable according to claim 1, characterized in that: The shielding layer (4) is made of tinned copper wire material.

7. The anti-bending flexible cable according to claim 1, characterized in that: The outer protective component comprises an outer protective sleeve (11), an inner protective frame, a heat dissipation ring (10) and a plurality of heat-conducting columns. The inner protective frame is arranged inside the outer protective sleeve (11), and a plurality of cables (13) are arranged inside the inner protective frame. The inner protective frame is made of metal material. The heat dissipation ring (10) is sleeved on the outer protective sleeve (11). The outer protective sleeve (11) is provided with a plurality of mounting holes for the heat-conducting columns to pass through. One end of the heat-conducting column is connected to the inner protective frame, and the other end is connected to the heat dissipation ring (10).

8. The anti-bending flexible cable according to claim 7, characterized in that: The inner protective frame comprises a connecting mechanism and a plurality of frame segments (12), and the plurality of frame segments (12) are connected via the connecting mechanism.

9. The anti-bending flexible cable according to claim 8, characterized in that: The connection mechanism comprises a connecting iron chain (18) and two fixing rings, the two fixing rings being respectively arranged at the connection positions of two adjacent frame segments (12), the connecting iron chain (18) being used to connect the two fixing rings, one end of the frame segment (12) being provided with a truncated cone-shaped groove (15), and the other end being provided with a truncated cone-shaped protruding platform (16) matching the shape of the groove (15).

10. The anti-bending flexible cable according to claim 9, characterized in that: The connecting mechanism further comprises a spring (20) and a fixed block (19); one end of the frame segment (12) is provided with a movable hole (21) for installing the fixed block (19) and a through hole matched with the connecting iron chain (18); one of the two fixed rings is provided on the movable block; one end of the spring (20) is connected to the movable block, and the other end is connected to the bottom of the movable hole (21); a pleated segment (14) is provided on the outer protective sleeve (11) at a position corresponding to the connection position of two adjacent frame segments (12); the pleated segment (14) is in a contracted state under normal conditions, and can be expanded when subjected to force.

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