Extruded low voltage power cable with abrasion resistant jacket

Abstract

The utility model relates to power cable technical field discloses especially a kind of extruded insulation low-voltage power cable of wear-resistant sheath, including power cable body, the inside of power cable body includes inner protective skin and cable body, the second pressure resistance layer is fixedly wrapped outside power cable body, the third insulating layer is fixedly wrapped outside second pressure resistance layer, the outer wear-resistant layer is fixedly wrapped outside third insulating layer, the inside of second pressure resistance layer is equipped with inner buffer groove, the inside of cable body is wrapped with inner support frame, and multiple rows of outer wear-resistant strips can protect outer wear-resistant layer, reduce the degree of wear of outer wear-resistant layer, and outer wear-resistant strip is trapezoidal, so when outer wear-resistant strip is worn, gradually difficult to wear phenomenon appears, so the wear resistance of power cable body can be delayed, and trapezoidal outer wear-resistant strip does not affect the moving ability of power cable body when underground direct-buried.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, and in particular to a wear-resistant sheathed extruded insulated low-voltage power cable. Background Technology

[0002] In the application scenario of direct underground burial of power cables, traditional power cables face a series of severe challenges, which seriously affect the service life, performance stability and reliability of power transmission.

[0003] Wear resistance issues

[0004] Wear and tear shortens lifespan: During direct burial underground, traditional power cables are easily damaged by friction from soil, rocks, and other external objects. Severe wear exposes the internal structure, increasing the risk of cable failure and significantly shortening its lifespan. Frequent cable replacements are not only costly but also disrupt the continuity of power supply.

[0005] Abrasion-resistant design flaws: Traditional cables often have simple abrasion-resistant structures and lack effective abrasion protection measures. Even with some abrasion-resistant layer designs, they cannot withstand friction under long-term, complex environments, resulting in limited abrasion resistance and making it difficult to meet the requirements for long-term stable operation of underground direct-buried cables.

[0006] Environmental adaptability issues

[0007] Insufficient temperature insulation: The underground environment experiences complex temperature variations, and traditional power cables lack effective temperature insulation structures. External temperature changes can easily be conducted to the cable body, affecting its internal electrical performance. For example, extreme low temperatures may make the internal materials of the cable brittle, reducing its flexibility and mechanical strength; high temperatures may accelerate the aging of the internal insulation materials, leading to a decline in insulation performance and causing safety hazards.

[0008] Poor insulation layer stability: The insulation layer of traditional cables is prone to rotation or displacement during actual use, failing to maintain its insulating effect continuously and effectively. This makes the cable body more susceptible to external environmental factors, reducing its adaptability to complex underground environments.

[0009] Pressure resistance issues

[0010] Weak compressive strength: Underground direct-buried cables need to withstand pressure from the soil above, and traditional cables lack sufficient compressive strength. When subjected to significant downward pressure, the cable body inside is prone to deformation, which in turn affects its electrical performance. For example, conductor deformation may lead to increased resistance and reduced power transmission efficiency; insulation deformation may cause insulation breakdown and other faults.

[0011] Lack of buffering and support structures: Traditional cables often lack effective buffering and support structures in their pressure resistance design. When subjected to external pressure, they cannot disperse and absorb the pressure in a timely manner, causing the pressure to concentrate on the cable body and increasing the risk of cable damage. Utility Model Content

[0012] (a) Technical problems to be solved

[0013] To address the shortcomings of existing technologies, this utility model provides a wear-resistant sheathed extruded insulated low-voltage power cable, which solves the technical problem that existing power cables have significant deficiencies in terms of wear resistance, environmental adaptability, and pressure resistance in underground direct burial applications, and cannot meet the technical requirements of modern power transmission for safe, stable, and long-life cables.

[0014] (II) Technical Solution

[0015] To achieve the above objectives, this utility model provides the following technical solution:

[0016] A wear-resistant extruded insulated low-voltage power cable includes a power cable body, which includes an inner protective sheath and a cable body. A second pressure-resistant layer is fixedly wrapped around the power cable body. A third insulating layer is fixedly wrapped around the second pressure-resistant layer. An outer wear-resistant layer is fixedly wrapped around the third insulating layer. An inner buffer groove is formed inside the second pressure-resistant layer. An inner support frame is wrapped inside the cable body.

[0017] Preferably, several rubber support columns are fixedly installed inside the inner buffer groove, and the several rubber support columns are arranged in equal rows inside the inner buffer groove. Several rows of first clips are fixed to the outer wall of the second pressure-resistant layer, and several rows of second clips are fixed to the inner wall of the outer wear-resistant layer. The inner and outer walls of the third isolation layer are both in contact with several first clips and second clips.

[0018] Preferably, the outer wall of the outer wear-resistant layer is fixed with several rows of outer wear-resistant strips, each of which has a trapezoidal cross-sectional shape and is wider in contact with the outer wear-resistant layer and narrower in the part away from the outer wear-resistant layer.

[0019] (III) Beneficial Effects

[0020] First, the multiple rows of outer wear-resistant strips outside the outer wear-resistant layer will be in contact with the outside environment first. The multiple rows of outer wear-resistant strips will protect the outer wear-resistant layer and reduce the degree of wear on the outer wear-resistant layer. Moreover, the outer wear-resistant strips are trapezoidal, so when the outer wear-resistant strips are worn, they will gradually become less wear-resistant. Therefore, they can delay the wear resistance of the power cable body. At the same time, the trapezoidal outer wear-resistant strips will not affect the mobility of the power cable body when it is directly buried underground.

[0021] Second, the third insulating layer can effectively separate and reduce the impact of external cold and warmth on the cable body. The first and second retaining strips between the second pressure-resistant layer and the outer wear-resistant layer can effectively reduce the probability of the third insulating layer rotating, further improving the service life of the power cable body. The inner buffer groove is provided in the second pressure-resistant layer, which can increase the downward pressure on the power cable body when directly buried. Moreover, the multiple rubber support columns in the inner buffer groove can effectively improve the support of the second pressure-resistant layer and prevent the internal cable body from deforming due to external pressure, further improving the service life of the power cable body when directly buried. Attached Figure Description

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0023] Figure 1 This is a structural diagram of the power cable body of this utility model;

[0024] Figure 2 This is a structural diagram of the inner protective skin of this utility model;

[0025] Figure 3 This is a structural diagram of the second pressure-resistant layer of this utility model;

[0026] Figure 4 This is a structural diagram of the third insulating layer of this utility model;

[0027] Figure 5 This is a structural diagram of the outer wear-resistant layer of this utility model.

[0028] Legend: 1. Power cable body; 11. Inner protective sheath; 12. Second pressure-resistant layer; 13. Third insulation layer; 14. Outer wear-resistant layer; 15. Inner buffer groove; 16. Rubber support column; 17. First clamping strip; 18. Second clamping strip; 19. Outer wear-resistant strip; 2. Cable body; 21. Inner support frame. Detailed Implementation

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the overall concept of the technical solution in this application embodiment is as follows:

[0030] To address the problems existing in the prior art, this utility model provides an extruded insulated low-voltage power cable with a wear-resistant sheath, comprising a power cable body 1, an inner protective sheath 11 and a cable body 2 inside the power cable body 1, a second pressure-resistant layer 12 fixedly wrapped around the power cable body 1, a third insulating layer 13 fixedly wrapped around the second pressure-resistant layer 12, an outer wear-resistant layer 14 fixedly wrapped around the third insulating layer 13, an inner buffer groove 15 is formed inside the second pressure-resistant layer 12, and an inner support frame 21 is wrapped inside the cable body 2.

[0031] Several rubber support columns 16 are fixedly installed inside the inner buffer groove 15, and the rubber support columns 16 are arranged in equal rows within the inner buffer groove 15. Several rows of first retaining strips 17 are fixed to the outer wall of the second pressure-resistant layer 12, and several rows of second retaining strips 18 are fixed to the inner wall of the outer wear-resistant layer 14. The third insulating layer 13 can effectively play a separating role, reducing the impact of external cold and heat on the cable body 2. The first retaining strips 17 and second retaining strips 18 between the second pressure-resistant layer 12 and the outer wear-resistant layer 14 can effectively reduce the impact of the third insulating layer. The probability of rotation of the third insulating layer 13 is reduced, which further improves the service life of the power cable body 1. The second pressure-resistant layer 12 has an inner buffer groove 15, which can improve the downward pressure on the power cable body 1 when it is directly buried. The inner and outer walls of the third insulating layer 13 are in contact with several first clips 17 and second clips 18. Several rows of outer wear-resistant strips 19 are fixed on the outer wall of the outer wear-resistant layer 14. The cross-sectional shape of each outer wear-resistant strip 19 is trapezoidal, and the part in contact with the outer wear-resistant layer 14 is wider and the part away from the outer wear-resistant layer 14 is narrower.

[0032] Working principle:

[0033] In the first step, when the power cable body 1 is used for direct underground burial, the multiple rows of outer wear-resistant strips 19 outside the outer wear-resistant layer 14 will preferentially come into contact with the outside environment. The multiple rows of outer wear-resistant strips 19 will protect the outer wear-resistant layer 14 and reduce the degree of wear on the outer wear-resistant layer 14. Moreover, the outer wear-resistant strips 19 are trapezoidal, so when the outer wear-resistant strips 19 are worn, they will gradually become less wear-resistant. Therefore, the wear resistance of the power cable body 1 can be delayed. At the same time, the trapezoidal outer wear-resistant strips 19 will not affect the mobility of the power cable body 1 when it is directly buried underground.

[0034] In the second step, when the power cable body 1 is directly buried for a long period of time, a third insulating layer 13 is used to separate the outer wear-resistant layer 14 and the second pressure-resistant layer 12. The third insulating layer 13 can effectively play a separating role and reduce the impact of external cold and heat on the cable body 2. The first locking strip 17 and the second locking strip 18 between the second pressure-resistant layer 12 and the outer wear-resistant layer 14 can effectively reduce the probability of the third insulating layer 13 rotating, further improving the service life of the power cable body 1. An inner buffer groove 15 is provided in the second pressure-resistant layer 12, which can increase the downward pressure on the power cable body 1 when directly buried. The multiple rubber support columns 16 in the inner buffer groove 15 can effectively improve the support of the second pressure-resistant layer 12 and prevent the internal cable body 2 from deforming due to external pressure, further improving the service life of the power cable body 1 when directly buried.

[0035] Power cable body 1: The core structure of the entire wear-resistant sheathed extruded insulated low-voltage power cable is the basic carrier for realizing the power transmission function. It integrates key components such as the inner protective sheath and the cable body, and is wrapped with protective structures such as the second pressure-resistant layer, the third insulation layer, and the outer wear-resistant layer. It undertakes the dual functions of power transmission and resisting the influence of the external environment.

[0036] Inner protective sheath 11: Located inside the power cable body 1, it is a protective structure wrapped around the outside of the cable body 2. Its main function is to directly protect the cable body 2, preventing damage such as friction and slight compression inside the cable. At the same time, it can also isolate moisture and impurities inside the cable to a certain extent, providing a relatively stable internal environment for the cable body 2.

[0037] The second pressure-resistant layer 12 is a structure that is fixedly wrapped around the outside of the power cable body 1. Its core function is to withstand external pressure and improve the overall pressure resistance of the cable. Especially in the case of direct burial of the cable, it can effectively resist the downward pressure brought by the external environment such as soil. The internal buffer groove can further enhance the buffering and pressure reduction effect, and the first retaining strip on the outer wall can also help fix the third insulation layer and prevent it from rotating.

[0038] The third insulating layer 13 is an insulating structure sandwiched between the second pressure-resistant layer 12 and the outer wear-resistant layer 14. Its main function is to block the influence of external cold and hot temperatures on the internal cable body 2 and maintain the temperature stability of the working environment of the cable body 2. At the same time, its inner and outer walls are in contact with the first and second clamping strips, and under the action of the clamping strips, it can prevent itself from rotating, ensuring the stability of the overall cable structure.

[0039] Outer abrasion-resistant layer 14: This is the outermost protective structure of the cable, its core function being to resist external abrasion and protect the internal structures of the cable from damage. Especially during direct burial of the cable, it can directly contact soil, sand, and gravel, reducing frictional damage to the cable. The second retaining strip on its inner wall can work with the first retaining strip to fix the third insulating layer, while the outer abrasion-resistant strip on the outer wall further enhances the abrasion resistance.

[0040] Inner buffer groove 15: A groove-shaped structure opened inside the second pressure-resistant layer 12. Its main function is to buffer external pressure. When the cable is directly buried and subjected to downward pressure, the inner buffer groove can disperse the pressure through its own structural characteristics, reduce the impact of pressure on the internal cable body 2, and at the same time provide installation space for the rubber support column.

[0041] Rubber support column 16: A support component fixedly installed inside the inner buffer groove 15, made of rubber, possessing a certain degree of elasticity and support. Its main function is to support the structure of the second pressure-resistant layer 12, enhance its pressure resistance, prevent deformation of the second pressure-resistant layer due to excessive external pressure, and thus protect the internal cable body 2 from deformation. Several rubber support columns arranged side by side can achieve uniform support and improve the buffering and pressure reduction effect.

[0042] First clamping strip 17: A strip-shaped structure fixed to the outer wall of the second pressure-resistant layer 12. It is usually arranged in several rows. Its main function is to fit against the inner wall of the third insulation layer 13 and work with the second clamping strip to restrict the rotation of the third insulation layer, so as to ensure that the third insulation layer is always in a stable position during the use of the cable and avoid the cable's insulation effect and overall structural stability being affected by the rotation of the third insulation layer.

[0043] Second clip 18: A strip structure fixed to the inner wall of the outer wear-resistant layer 14, also arranged in several rows, corresponding to the first clip 17. Its main function is to fit against the outer wall of the third insulating layer 13 and work together with the first clip to further restrict the rotation of the third insulating layer, enhance the connection stability between the third insulating layer and the second pressure-resistant layer and the outer wear-resistant layer, and ensure the reliability of the overall cable structure.

[0044] Outer abrasion strip 19: A strip-shaped abrasion-resistant component fixed to the outer wall of the outer abrasion-resistant layer 14, arranged in several rows, with a trapezoidal cross-section, and a wider portion in contact with the outer abrasion-resistant layer and a narrower portion away from it. Its core function is to enhance the abrasion resistance of the outer abrasion-resistant layer. When the cable is directly buried and in contact with the outside environment, the outer abrasion strip wears out first. The trapezoidal structure ensures that as the wear increases during the abrasion process, the remaining portion can still maintain a good abrasion resistance, delaying the decline in the overall abrasion resistance of the cable. At the same time, the trapezoidal structure does not affect the movement operation of the cable during direct burial.

[0045] Cable body 2: Located inside the power cable body 1, it is the core component for power transmission. It contains key structures such as conductive core wires and is responsible for transmitting power from one end to the other. It is wrapped with an inner protective sheath and has an internal support frame. While ensuring the power transmission function, the internal support frame also maintains its own structural stability and prevents deformation caused by external forces from affecting transmission performance.

[0046] Inner support frame 21: A support structure set inside the cable body 2. Its main function is to support the internal structure of the cable body 2, ensure that the conductive core wires and other components inside the cable body maintain a stable relative position, and avoid displacement or deformation of internal components due to external forces such as cable bending and squeezing, thereby ensuring the stability and reliability of power transmission of the cable body 2.

[0047] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A wear-resistant sheathed extruded insulated low-voltage power cable, comprising a power cable body (1), characterized in that, The power cable body (1) includes an inner protective sheath (11) and a cable body (2). The power cable body (1) is fixedly wrapped with a second pressure-resistant layer (12). The second pressure-resistant layer (12) is fixedly wrapped with a third insulation layer (13). The third insulation layer (13) is fixedly wrapped with an outer wear-resistant layer (14). An inner buffer groove (15) is provided inside the second pressure-resistant layer (12). The cable body (2) is wrapped with an inner support frame (21).

2. The wear-resistant sheathed extruded insulated low-voltage power cable as described in claim 1, characterized in that, Several rubber support columns (16) are fixedly installed inside the inner buffer groove (15), and the rubber support columns (16) are arranged in equal rows inside the inner buffer groove (15).

3. The wear-resistant sheathed extruded insulated low-voltage power cable as described in claim 1, characterized in that, The outer wall of the second pressure-resistant layer (12) is fixed with several rows of first clips (17).

4. The wear-resistant sheathed extruded insulated low-voltage power cable as described in claim 3, characterized in that, The inner wall of the outer wear-resistant layer (14) is fixed with several rows of second clips (18), and the inner and outer walls of the third insulating layer (13) are in contact with several first clips (17) and second clips (18).

5. The wear-resistant sheathed extruded insulated low-voltage power cable as described in claim 1, characterized in that, The outer wear-resistant layer (14) has several rows of outer wear-resistant strips (19) fixed on its outer side wall.

6. The wear-resistant sheathed extruded insulated low-voltage power cable as described in claim 5, characterized in that, Each outer wear-resistant strip (19) has a trapezoidal cross-sectional shape, and the part that is in contact with the outer wear-resistant layer (14) is wider, while the part that is away from the outer wear-resistant layer (14) is narrower.

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