Metallic shielded water-blocking cable
Patent Information
- Application Number
- CN202522219014.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-10-21
AI Technical Summary
[0003]但铜丝疏绕相邻的铜丝之间会存在间隙，在铜丝疏绕的外层再包覆阻水带时或者在电缆的敷设或者使用过程中发现弯曲时，铜丝疏绕中的铜丝就存在偏移的可能性，从而影响铜丝疏绕的松紧度，不利于电缆的成型质量
[0014]作为本实用新型的一种改进，同一圈阻水带中相邻的两根所述铜丝之间的距离大于四倍铜丝的线径，通过所述改进，因为相邻两圈的阻水带通过扣合束进行扣合，而扣合束内设有铜丝，故而相扣合的扣合束区域铜丝较为密集，为保证铜丝在电缆中的疏绕特性，则需要保证同一圈阻水带上铜丝之间的间距。
Smart Images
Figure CN224745508U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cables, specifically to a metal-shielded water-blocking cable. Background Technology
[0002] Traditional metal shielding layers include those using loosely wound copper wires. Loosely wound copper wires can ensure the isolation of the core wire from the external electromagnetic field, while reducing the current transmission length compared to copper strip metal shielding layers, thereby reducing the heat generation of the metal shielding layer.
[0003] However, gaps may exist between adjacent copper wires in the copper wire slack winding. When water-blocking tape is wrapped around the outer layer of the copper wire slack winding, or when bending is found during the laying or use of the cable, the copper wires in the copper wire slack winding may shift, thus affecting the tightness of the copper wire slack winding and being detrimental to the forming quality of the cable. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to provide a metal-shielded water-blocking cable that improves the wrapping stability of loosely wound copper wires and ensures the tightness of the wrapping.
[0005] The technical solution adopted by this utility model to solve the above problems is as follows: a metal shielded water-blocking cable, including a body, the body including a core wire, the core wire being wrapped with a water-blocking strip in layers, and the water-blocking strip containing multiple copper wires arranged along the length direction of the water-blocking strip, the multiple copper wires being arranged in a uniformly spaced array along the width direction of the water-blocking strip.
[0006] Compared with existing technologies, the advantages of this invention are as follows: A composite tape is formed by integrating the water-blocking tape and copper wire into a single design. The copper wire is then unwound by wrapping the composite tape. Because the composite tape provides greater stability after wrapping, and the overlapping wrapping between the composite tapes prevents tape misalignment, the stability of the copper wire unwound is ensured, preventing changes in wire tightness due to cable bending. Simultaneously, multiple copper wires are wrapped synchronously in one loop of the water-blocking tape, reducing the number of wrapping turns and improving wrapping efficiency. Furthermore, because the copper wire is protected by the water-blocking tape, it is less prone to breakage, allowing for the use of finer diameter wires for unwound winding, thus reducing costs and providing better advantages in medium and low voltage cables.
[0007] As an improvement of this utility model, the water-blocking tape is provided with at least two protruding fastening bundles. One of the fastening bundles fastens with another fastening bundle of the previous loop of water-blocking tape, and the other fastening bundle fastens with a fastening bundle of the next loop of water-blocking tape. Through this improvement, the interlocking of the fastening bundles on the water-blocking tape can better achieve the layering rate during the wrapping process of the water-blocking tape, ensure the stability of the layering, and also avoid the offset between the water-blocking tapes, making the spacing between the copper wires more stable and ensuring the forming quality of the cable.
[0008] As an improvement of this utility model, the number of copper wires is equal to the number of fastening bundles, and each copper wire is located on the axis of the fastening bundle. With this improvement, the position of the copper wire can be determined by the position of the fastening bundle. At the same time, if the water-blocking tape maintains the flatness of the surface, the thickness of the area used to cover the copper wire will be too thin, which will easily affect the water-blocking performance of the water-blocking tape, or the overall thickness of the water-blocking tape will be too thick, resulting in an increase in the cost of the water-blocking tape.
[0009] As an improvement of this utility model, the fastening bundle includes a side fastening bundle, which is disposed on both sides in the width direction of the water-blocking tape. Through this improvement, the layering of the water-blocking tape during the wrapping process is ensured, thereby avoiding the occurrence of wrapping gaps in the water-blocking tape and affecting the wrapping water-blocking performance of the water-blocking tape.
[0010] As an improvement of this utility model, the number of the fastening bundles is even, and the fastening bundles also include middle fastening bundles disposed on both sides of the center line of the water-blocking strip.
[0011] As an improvement of this utility model, the middle side fastening bundle near the previous water-blocking strip is fastened to the side fastening bundle located at the end of the previous water-blocking strip, and the middle side fastening bundle near the next water-blocking strip is fastened to the side fastening bundle located at the beginning of the next water-blocking strip. Through the above improvement, the water-blocking strip is wrapped around, ensuring that the two adjacent water-blocking strips are stacked, thereby ensuring the water-blocking effect.
[0012] As an improvement of this utility model, the number of the fastening bundles is odd, and the fastening bundles also include a central fastening bundle disposed on the center line of the water-blocking belt and middle side fastening bundles disposed on both sides of the central fastening bundle.
[0013] As an improvement of this utility model, the middle side fastening bundle near the previous water-blocking strip is fastened to the side fastening bundle located at the end of the previous water-blocking strip, and the middle side fastening bundle near the next water-blocking strip is fastened to the side fastening bundle located at the beginning of the next water-blocking strip. Through the above improvement, the water-blocking strip is wrapped around, ensuring that the two adjacent water-blocking strips are stacked, thereby ensuring the water-blocking effect.
[0014] As an improvement of this utility model, the distance between two adjacent copper wires in the same loop of water-blocking tape is greater than four times the diameter of the copper wire. Through this improvement, since the two adjacent loops of water-blocking tape are fastened by a fastening bundle, and the fastening bundle contains copper wires, the copper wires in the fastening bundle area are relatively dense. In order to ensure the loose winding characteristics of the copper wires in the cable, it is necessary to ensure the spacing between the copper wires in the same loop of water-blocking tape. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this utility model.
[0016] Figure 2 This is a schematic diagram of the stacked structure of the water-blocking tape in Embodiment 1 of this utility model.
[0017] Figure 3 This is a schematic diagram of the stacked structure of the water-blocking tape in Embodiment 2 of this utility model.
[0018] The diagram shows: 1. Core wire, 2. Water-blocking tape, 2.1. Copper wire, 2.2. Fastening bundle, 2.2.1. Side fastening bundle, 2.2.2. Middle side fastening bundle, 2.2.3. Center fastening bundle. Detailed Implementation
[0019] The embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0020] Example 1: like Figures 1-2 As shown, a metal-shielded water-blocking cable includes a body, which includes a core wire 1. A water-blocking strip 2 is wrapped around the outer layer of the core wire 1. Four copper wires 2.1 are arranged along the length of the water-blocking strip 2 and are evenly spaced along the width of the water-blocking strip 2. The distance between two adjacent copper wires 2.1 in the same loop of the water-blocking strip 2 is greater than four times the diameter of the copper wire 2.1. Four protruding fastening bundles 2.2 are provided on the water-blocking strip 2, and each copper wire 2.1 is located on the axis of the fastening bundle 2.2. The fastening bundle 2.2 includes a side fastening bundle 2.2.1, which is located on both sides of the water-blocking strip 2 in the width direction. The fastening bundle 2.2 also includes a middle side fastening bundle 2.2.2 located on both sides of the center line of the water-blocking strip 2. The middle side fastening bundle 2.2.2 near the previous loop of the water-blocking strip 2 is fastened to the side fastening bundle 2.2.1 located at the end of the previous loop of the water-blocking strip 2. The middle side fastening bundle 2.2.2 near the next loop of the water-blocking strip 2 is fastened to the side fastening bundle 2.2.1 located at the beginning of the next loop of the water-blocking strip 2.
[0021] During the wrapping process of the water-blocking tape 2, the stacking rate of the water-blocking tape 2 is above 33% and less than 50%, and the proportion of the double-layer area of a single loop of the water-blocking tape 2 is above 66%. This ensures the stacking width of the water-blocking tape 2, ensures the water-blocking capacity of the water-blocking tape 2, and avoids the situation of stacking three loops of the water-blocking tape 2. It also avoids the situation of excessive height difference of the water-blocking tape 2 during the stacking process, thereby ensuring the wrapping quality of the water-blocking tape 2.
[0022] Example 2: like Figure 3 As shown, a metal-shielded water-blocking cable includes a body, which includes a core wire 1. A water-blocking strip 2 is wrapped around the core wire 1 in multiple layers. Five copper wires 2.1 are arranged along the length of the water-blocking strip 2 and are evenly spaced along the width of the water-blocking strip 2. The distance between two adjacent copper wires 2.1 in the same loop of the water-blocking strip 2 is greater than four times the diameter of the copper wire 2.1. Five protruding fastening bundles 2.2 are provided on the water-blocking strip 2, and each copper wire 2.1 is located on the axis of the fastening bundle 2.2. The fastening bundle 2.2 includes side... Side fastening bundle 2.2.1, the side fastening bundle 2.2.1 is provided on both sides of the water-blocking strip 2 in the width direction. The fastening bundle 2.2 also includes a center fastening bundle 2.2.3 provided on the center line of the water-blocking strip 2 and middle side fastening bundles 2.2.2 provided on both sides of the center fastening bundle 2.2.3. The middle side fastening bundle 2.2.2 near the previous loop of the water-blocking strip 2 is fastened with the side fastening bundle 2.2.1 provided at the end of the previous loop of the water-blocking strip 2. The middle side fastening bundle 2.2.2 near the next loop of the water-blocking strip 2 is fastened with the side fastening bundle 2.2.1 provided at the beginning of the next loop of the water-blocking strip 2.
[0023] During the wrapping process of the water-blocking tape 2, it was not fastened and layered using the central fastening bundle 2.2.3. This ensured that the layering rate of the water-blocking tape 2 was above 25% and below 50%, and the double-layer area of a single loop of the water-blocking tape 2 accounted for more than 50%. This guaranteed the layering width of the water-blocking tape 2, ensuring its sufficient water-blocking ability, while avoiding the occurrence of three loops of the water-blocking tape 2. This also prevented excessive height differences in the water-blocking tape 2 during the layering process, thus ensuring the wrapping quality of the water-blocking tape 2. Figure 3 In the calculation of the overlapping area of the upper fastening bundle 2.2 and the tilting deformation of the area of the central fastening bundle 2.2.3 during the overlapping and wrapping process, the proportion of the double-layer area of a single loop of water-blocking tape 2 can be more than 60%. If the central fastening bundle 2.2.3 is used for fastening, a three-layer overlapping area will appear, and the proportion of the three-layer overlapping is relatively low, around 10%. As a result, when the aluminum sleeve of the outer layer of water-blocking tape 2 is formed, the flatness of the abutting area inside the aluminum sleeve is obviously poor, with a large gap. When the aluminum sleeve is under pressure, it is easy to deform, thus affecting the forming quality of the aluminum sleeve. In addition, the three-layer overlapping design will also increase the usage cost of water-blocking tape 2.
[0024] The water-blocking tape 2 and copper wire 2.1 are integrated into a composite tape, and the copper wire 2.1 is loosely wound by wrapping the composite tape. Because the composite tape has stronger stability after wrapping, and the overlapping wrapping of the composite tape and the interlocking of the buckling bundle 2.2 can prevent the composite tape from shifting, thus ensuring the stability of the loose winding of copper wire 2.1 and preventing changes in the tightness of the loose winding of copper wire 2.1 due to cable bending. At the same time, multiple copper wires 2.1 are wrapped synchronously in one turn of the water-blocking tape 2, thereby reducing the number of wrapping turns of copper wire 2.1 and improving the wrapping efficiency of copper wire 2.1. Furthermore, because the copper wire 2.1 is protected by the water-blocking tape 2, it is not easy to break. Therefore, copper wire 2.1 can be used with a smaller diameter for loose winding, thereby reducing the cost of loose winding of copper wire 2.1 and giving it better advantages in medium and low voltage cables.
[0025] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.
Claims
1. A metal-shielded water-blocking cable, comprising a body, characterized in that: The main body includes a core wire (1), and the outer layer of the core wire (1) is wrapped with a water-blocking strip (2). The water-blocking strip (2) contains multiple copper wires (2.1) arranged along the length direction of the water-blocking strip (2), and the multiple copper wires (2.1) are arranged in a uniformly spaced array along the width direction of the water-blocking strip (2).
2. The metal-shielded water-blocking cable according to claim 1, characterized in that: The water-blocking strip (2) is provided with at least two protruding fastening bundles (2.2), one of the fastening bundles (2.2) is fastened to another fastening bundle (2.2) of the previous water-blocking strip (2), and the other fastening bundle (2.2) is fastened to one fastening bundle (2.2) of the next water-blocking strip (2).
3. The metal-shielded water-blocking cable according to claim 2, characterized in that: The number of copper wires (2.1) is equal to the number of fastening bundles (2.2), and each copper wire (2.1) is located on the axis of the fastening bundle (2.2).
4. The metal-shielded water-blocking cable according to claim 3, characterized in that: The fastening bundle (2.2) includes a side fastening bundle (2.2.1), which is located on both sides of the water-blocking strip (2) in the width direction.
5. The metal-shielded water-blocking cable according to claim 4, characterized in that: The number of the fastening bundles (2.2) is even, and the fastening bundles (2.2) also include the middle fastening bundles (2.2.2) located on both sides of the center line of the water-blocking strip (2).
6. The metal-shielded water-blocking cable according to claim 5, characterized in that: The middle side fastening bundle (2.2.2) near the previous water-blocking strip (2) and the side fastening bundle at the end of the previous water-blocking strip (2) ( 2.2.1) Fastening: The middle fastening bundle (2.2.2) in the water-blocking strip (2) of the next loop fastening strip (2) fastens with the side fastening bundle (2.2.1) at the starting end in the water-blocking strip (2) of the next loop.
7. The metal-shielded water-blocking cable according to claim 4, characterized in that: The number of the fastening bundles (2.2) is odd. The fastening bundles (2.2) also include a central fastening bundle (2.2.3) located on the center line of the water-blocking strip (2) and a middle side fastening bundle (2.2.2) located on both sides of the central fastening bundle (2.2.3).
8. The metal-shielded water-blocking cable according to claim 7, characterized in that: The middle side fastening bundle (2.2.2) near the previous water-blocking strip (2) and the side fastening bundle at the end of the previous water-blocking strip (2) ( 2.2.1) Fastening: The middle fastening bundle (2.2.2) in the water-blocking strip (2) of the next loop fastening strip (2) fastens with the side fastening bundle (2.2.1) at the starting end in the water-blocking strip (2) of the next loop.
9. The metal-shielded water-blocking cable according to claim 4, characterized in that: The distance between two adjacent copper wires (2.1) in the same water-blocking strip (2) is greater than four times the diameter of the copper wire (2.1).