Anti-interference weak current cable

Abstract

The utility model relates to the technical field of power cables, and discloses an anti-interference weak current cable, which solves the technical problem of how to reduce differential mode interference at present, and comprises a cable core, an inner wrapping insulating layer, an anti-interference braid layer, a waterproof layer and an outer wrapping layer which are distributed from inside to outside, a plurality of containing cavities are formed in the partition support in the circumferential direction, the core wires are evenly distributed in the containing cavities, an annular sliding groove is formed in the inner wall of the inner wrapping insulating layer, the outer end of the partition support is inserted into the annular sliding groove, and the partition support can rotate and move front and back in the annular sliding groove so that the parallelism and the distance between the core wires can be adjusted. According to the technical scheme, firstly, the core wires are isolated by using the separation bracket, and then the distance and the angle between the core wires in the accommodating cavity are adjusted by using the rotation or the front-back movement of the separation bracket in the inner wrapping insulating layer, so that the differential mode interference is reduced and the degree of the differential mode interference is kept equal; and later compensation of transmission signals is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, and more specifically, to an anti-interference weak-current cable. Background Art

[0002] Weak current cables refer to cables used for security communications, electrical equipment and related weak current transmission purposes. There is no strict boundary between "wires" and "cables". Usually, products with a small number of cores, small product diameter and simple structure are called wires, those without insulation are called bare wires, and others are called cables; those with larger conductor cross-sectional areas are called large wires, those with smaller conductor cross-sectional areas are called small wires, and insulated wires are also called cloth wires.

[0003] When using weak current cables for transmission, some special environments have obvious electromagnetic interference, and special treatment is required on the cable material or structure to reduce the damage to information transmission. Among the many reasons for the complexity of electromagnetic interference, interference usually exists in two different modes. That is, common mode mode and differential mode mode. Among them, common mode interference refers to the interference between the line and the earth, which is the interference between the current-carrying conductor and the earth. Differential mode interference is the interference between lines. For power lines, differential mode interference specifically refers to the interference between the phase line and the neutral line; for three-phase circuits, differential mode interference also refers to the interference between phase lines. This is the potential difference between current-carrying conductors.

[0004] The utility model aims to reduce differential mode interference and proposes a new technical solution for a weak point cable structure. Utility Model Content

[0005] In response to the technical problem of how to reduce differential mode interference raised in the background technology, the utility model first uses a separation bracket to isolate the core wires, and then uses the separation bracket to rotate or move back and forth inside the inner insulating layer to adjust the distance and angle between the core wires in the accommodating cavity, thereby reducing the differential mode interference while keeping the degree of differential mode interference as equal as possible, which is easy to compensate for the transmission signal later.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An anti-interference weak-current cable comprises a cable core, an inner insulating layer, an anti-interference braided layer, a water-blocking layer and an outer sheath distributed from inside to outside, the cable core comprises a partition bracket and a core wire, the partition bracket is formed by splicing a plurality of monomers with the same structure, the partition bracket is formed with a plurality of accommodating cavities along the circumferential direction, the core wires are evenly distributed in the accommodating cavities, an annular groove is provided on the inner wall of the inner insulating layer, the outer end of the partition bracket is inserted into the annular groove, and the partition bracket can rotate and move forward and backward in the annular groove to adjust the parallelism and spacing between the core wires.

[0008] Through the above technical solution: the utility model first uses a separation bracket to isolate the core wires, and then uses the separation bracket to rotate or move back and forth inside the inner insulation layer to adjust the distance and angle between the core wires in the accommodating cavity, thereby reducing the differential mode interference while keeping the degree of differential mode interference as equal as possible, which is easy to compensate for the transmission signal later. Among them, the reason for adjusting the distance and angle between the core wires in the accommodating cavity is that after the cable has been used for a period of time, the cable may bend or twist due to external reasons, causing the distance and angle between the internal core wires to change, resulting in different degrees of differential mode interference, and thus making it difficult to perform subsequent compensation processing.

[0009] The utility model further has the advantage that: the accommodating cavity is filled with a cable core filling layer.

[0010] The utility model further has the advantage that: the accommodating cavity is formed by partitions on the partition bracket.

[0011] The utility model further provides that: the anti-interference braided layer is used to play a shielding role.

[0012] The utility model further has the structure of the water-blocking layer comprising an outer shell, oil injection holes are provided at both ends of the outer shell, and a water-blocking oil film is provided inside the outer shell through the oil injection holes.

[0013] Through the above technical solution: Since the cost of using a metal waterproof layer is relatively high and the use of a metal waterproof layer greatly increases the weight of the entire cable, the utility model uses an oily barrier layer to achieve the waterproof purpose.

[0014] The utility model further has the following advantages: the thickness of the water-blocking oil film is 1 mm-10 mm.

[0015] The utility model further has the following advantages: the outer surface of the water-blocking layer is provided with protrusions, the inner surface of the outer cladding layer is provided with grooves, and when the water-blocking layer and the outer cladding layer are bonded, the protrusions and the grooves are matched and connected.

[0016] In summary, the utility model has the following beneficial effects:

[0017] (1) The utility model first uses a separation bracket to isolate the core wires, and then uses the separation bracket to rotate or move forward and backward inside the inner insulation layer to adjust the distance and angle between the core wires in the accommodating cavity, thereby reducing the differential mode interference while keeping the degree of differential mode interference as equal as possible, which is easy to compensate for the transmission signal later;

[0018] (2) The utility model utilizes an oily barrier layer to achieve the purpose of waterproofing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the weak current cable of the utility model.

[0020] Figure numerals: 1, cable core; 1-1, partition bracket; 1-2, core wire; 1-3, accommodating cavity; 1-4, cable core filling layer; 1-5, partition; 2, inner insulation layer; 2-1, annular slide groove; 3, anti-interference braided layer; 4, water-blocking layer; 4-1, outer shell; 4-2, oil filling hole; 4-3, water-blocking oil film; 5, outer shell. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation methods of the present invention are not limited thereto.

[0022] An anti-interference weak current cable, such as Figure 1 As shown, its internal structure includes a cable core 1, an inner insulating layer 2, an anti-interference braided layer 3, a water-blocking layer 4 and an outer sheath 5 which are distributed from inside to outside.

[0023] Reference Figure 1 As shown, the cable core 1 includes a partition bracket 1-1 and a core wire 1-2. The partition bracket 1-1 is formed by splicing multiple monomers with the same structure, that is, the partition bracket 1-1 is not directly arranged inside the cable core 1 at one end, but is composed of multiple monomers with a certain distance between each other. The advantage of this arrangement is that the angle and position of a single partition bracket 1-1 can be adjusted, thereby adjusting the coaxiality of the core wire 1-2 installed inside the partition bracket 1-1.

[0024] In order to realize the installation of the core wire 1-2 by the partition bracket 1-1, the technical solution of the utility model still adopts a similar solution of the prior art, that is, the partition bracket 1-1 is formed with a plurality of accommodating cavities 1-3 along the circumferential direction, the core wire 1-2 is evenly distributed in the accommodating cavities 1-3, and the accommodating cavities 1-3 are formed by the partitions 1-5 on the partition bracket 1-1. The difference is that an annular groove 2-1 is opened on the inner wall of the inner insulating layer 2, and the outer end of the partition bracket 1-1 is inserted into the annular groove 2-1. The partition bracket 1-1 can rotate and move forward and backward in the annular groove 2-1 to adjust the parallelism and spacing between the core wires 1-2 and the core wires 1-2. Therefore, the distance and angle between the core wires 1-2 in the accommodating cavity can be adjusted by rotating or moving forward and backward inside the inner insulating layer 2, so as to reduce the differential mode interference and keep the degree of differential mode interference as equal as possible, which is easy to compensate for the transmission signal later.

[0025] At the same time, the accommodating cavity 1-3 is also filled with a cable core filling layer 1-4, and the cable core filling layer 1-4 is a material with a certain fluidity, so as to facilitate the adjustment of the partition bracket 1-1.

[0026] In addition, in order to ensure the conventional anti-interference performance and waterproof performance of the cable. The anti-interference braided layer 3 in the technical solution of the utility model is used to play a shielding role. The structure of the water-blocking layer 4 includes an outer shell 4-1, and oil injection holes 4-2 are opened at both ends of the outer shell 4-1. A water-blocking oil film 4-3 is arranged inside the outer shell 4-1 through the oil injection holes 4-2. The thickness of the water-blocking oil film 4-3 is 1mm-10mm.

[0027] In order to achieve a firm connection between the water blocking layer 4 and the outer cladding 5, a protrusion is provided on the outer surface of the water blocking layer 4 and a groove is provided on the inner surface of the outer cladding 5. When the water blocking layer 4 and the outer cladding 5 are bonded, the protrusion and the groove are matched and connected.

[0028] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An anti-interference weak current cable, characterized in that: The invention comprises a cable core (1), an inner insulating layer (2), an anti-interference braided layer (3), a water-blocking layer (4) and an outer layer (5) which are arranged from inside to outside. The cable core (1) comprises a partition bracket (1-1) and a core wire (1-2). The partition bracket (1-1) is formed by splicing a plurality of monomers with the same structure. The partition bracket (1-1) is provided with a plurality of accommodating cavities (1-3) along the circumferential direction. The core wire (1-2) is evenly distributed in the accommodating cavities (1-3). The inner wall of the inner insulating layer (2) is provided with an annular groove (2-1). The outer end of the partition bracket (1-1) is inserted into the annular groove (2-1). The partition bracket (1-1) can rotate and move forward and backward in the annular groove (2-1) to adjust the parallelism and spacing between the core wires (1-2).

2. The anti-interference weak-current cable according to claim 1, characterized in that: The accommodating cavity (1-3) is filled with a cable core filling layer (1-4).

3. The anti-interference weak-current cable according to claim 1, characterized in that: The accommodating chamber (1-3) is formed by partitioning the partition plates (1-5) on the partition bracket (1-1).

4. The anti-interference weak-current cable according to claim 1, characterized in that: The anti-interference braided layer (3) is used to play a shielding role.

5. The anti-interference weak-current cable according to claim 1, characterized in that: The structure of the water-blocking layer (4) comprises an outer shell (4-1), oil injection holes (4-2) are provided at both ends of the outer shell (4-1), and a water-blocking oil film (4-3) is provided inside the outer shell (4-1) through the oil injection holes (4-2).

6. The anti-interference weak-current cable according to claim 5, characterized in that: The thickness of the water-blocking oil film (4-3) is 1 mm to 10 mm.

7. The anti-interference weak-current cable according to claim 1, characterized in that: The outer surface of the water-blocking layer (4) is provided with a protrusion, and the inner surface of the outer cladding layer (5) is provided with a groove. When the water-blocking layer (4) and the outer cladding layer (5) are bonded together, the protrusion and the groove are matched and connected.

Images