Low-smoke halogen-free flame-retardant twisted-pair special cable

Abstract

The utility model discloses a low-smoke halogen-free flame-retardant twisted-pair special cable, which comprises two groups of cables, an auxiliary fixing frame is arranged between the two groups of cables, and close sides of the two groups of cables extend into the auxiliary fixing frame and are connected through an adhesive tape. Auxiliary clamping assemblies matched with the two sets of cables are arranged on the two sides of the auxiliary fixing frame respectively, each cable comprises an insulating layer, a plurality of cable cores which are evenly distributed are arranged in the insulating layer, and a buffer layer is arranged on the outer wall of the insulating layer in a sleeving mode. The cable butt joint device has the beneficial effects that two groups of cables can be fixed during butt joint by arranging the auxiliary fixing frame and the auxiliary clamping assembly, adhesive tape is prevented from being torn, the connection stability is improved, and the auxiliary clamping assembly extrudes an elastic sheet through cooperation of an adjusting nut and a sliding pressing sleeve, so that operation is simple, and use is convenient; and the buffer layer is arranged to prevent the cable from being extruded to cause damage to the internal cable core, so that the safety is further improved.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a low-smoke, halogen-free, flame-retardant twisted-pair special cable. Background Technology

[0002] Specialty cables are resistant to high temperatures, acids and alkalis, and termites, and are used in applications such as ships, airplanes, and nuclear power plants. In terms of classification, they do not belong to the same category as power, control, and computer cables; that is, the aforementioned cables also include specialty cables. Generally, specialty cables require the establishment of internal control standards. Specialty cables are a series of products with unique properties and special structures. Compared to the widely available ordinary wires and cables, they are characterized by higher technical content, stricter usage conditions, smaller batch sizes, and higher added value. They often employ new materials, new structures, new processes, and new design calculations.

[0003] During the installation and splicing of existing cables, two sets of cables are mainly connected together by tape. However, the tape at the connection point is prone to tearing and falling off during the pulling of the cables, resulting in an unreliable cable splice connection.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0005] In view of the problems in the related technologies, this utility model proposes a low-smoke halogen-free flame-retardant twisted-pair special cable to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A low-smoke halogen-free flame-retardant twisted-pair special cable includes two sets of cables, with an auxiliary fixing frame between the two sets of cables. The adjacent sides of the two sets of cables extend into the auxiliary fixing frame and are connected by tape. Each side of the auxiliary fixing frame is provided with an auxiliary clamping assembly that matches the two sets of cables. The cable includes an insulation layer with a plurality of evenly distributed cable cores. A buffer layer is fitted on the outer wall of the insulation layer, a flame-retardant layer is fitted on the outer wall of the buffer layer, a waterproof layer is fitted on the outer wall of the flame-retardant layer, and a low-smoke halogen-free layer is fitted on the outer wall of the waterproof layer.

[0008] Preferably, the insulating layer is made of polyvinyl chloride.

[0009] Preferably, the flame-retardant layer is made of glass fiber.

[0010] Preferably, the auxiliary clamping assembly includes a fixing sleeve on both sides of the auxiliary fixing frame that matches the cable, an adjusting sleeve on the side of the fixing sleeve away from the auxiliary fixing frame, an adjusting nut on the outer wall of the adjusting sleeve, a sliding pressure sleeve on the outer wall of the fixing sleeve, the sliding pressure sleeve being fixedly connected to the adjusting nut, the fixing sleeve having a plurality of mounting holes arranged in a circumferential array, an elastic piece in each mounting hole, and a pressure block on one side of the elastic piece that abuts against the cable.

[0011] Preferably, the outer wall of the adjusting sleeve has a threaded groove that matches the adjusting nut.

[0012] Preferably, the pressure block is provided with an anti-slip pad on the side near the cable.

[0013] The beneficial effects of this utility model are as follows: by setting an auxiliary fixing frame and an auxiliary clamping assembly, the two sets of cables can be fixed when they are connected, preventing the tape from tearing and improving the connection stability. In addition, the auxiliary clamping assembly is simple and convenient to use because it cooperates with the sliding pressure sleeve to squeeze the elastic sheet through the adjusting nut. By setting a buffer layer, the cable core can be prevented from being squeezed and damaged, further improving its safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a low-smoke, halogen-free, flame-retardant twisted-pair special cable according to an embodiment of the present utility model;

[0016] Figure 2 This is a front view of a low-smoke, halogen-free, flame-retardant twisted-pair special cable according to an embodiment of the present utility model;

[0017] Figure 3 This is a top sectional view of an auxiliary fixing frame in a low-smoke, halogen-free, flame-retardant twisted-pair special cable according to an embodiment of the present utility model.

[0018] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle;

[0019] Figure 5 This is a schematic diagram of the cable structure in a low-smoke, halogen-free, flame-retardant twisted-pair special cable according to an embodiment of the present utility model.

[0020] In the picture:

[0021] 1. Auxiliary fixing bracket; 2. Cable; 3. Adhesive tape; 4. Insulation layer; 5. Cable core; 6. Buffer layer; 7. Flame retardant layer; 8. Waterproof layer; 9. Low smoke halogen-free layer; 10. Fixing sleeve; 11. Adjusting sleeve; 12. Adjusting nut; 13. Sliding pressure sleeve; 14. Mounting hole; 15. Elastic sheet; 16. Pressure block; 17. Threaded groove. Detailed Implementation

[0022] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0023] According to an embodiment of the present invention, a low-smoke, halogen-free, flame-retardant twisted-pair special cable is provided. Example

[0024] like Figure 1-5 As shown, the low-smoke halogen-free flame-retardant twisted-pair special cable according to an embodiment of the present invention includes two sets of cables 2, with an auxiliary fixing frame 1 between the two sets of cables. The two sets of cables 2 extend to the auxiliary fixing frame 1 on their adjacent sides and are connected by tape 3. The auxiliary fixing frame 1 has auxiliary clamping components on both sides that match the two sets of cables 2 respectively. The cable 2 includes an insulation layer 4, with a plurality of evenly distributed cable cores 5 in the insulation layer 4. A buffer layer 6 is sleeved on the outer wall of the insulation layer 4, a flame-retardant layer 7 is sleeved on the outer wall of the buffer layer 6, a waterproof layer 8 is sleeved on the outer wall of the flame-retardant layer 7, and a low-smoke halogen-free layer 9 is sleeved on the outer wall of the waterproof layer 8. Example

[0025] like Figure 1-5As shown, the system includes two sets of cables 2, with an auxiliary fixing bracket 1 between them. The adjacent sides of both sets of cables 2 extend into the auxiliary fixing bracket 1 and are connected by tape 3. The auxiliary fixing bracket 1 has auxiliary clamping assemblies on both sides that match the two sets of cables 2. Each cable 2 includes an insulation layer 4, within which several evenly distributed cable cores 5 are arranged. A buffer layer 6 is fitted over the outer wall of the insulation layer 4, followed by a flame-retardant layer 7, a waterproof layer 8, and a low-smoke halogen-free layer 9. The insulation layer 4 is made of polyvinyl chloride (PVC). The flame-retardant layer 7 is made of fiberglass. The auxiliary clamping assembly includes fixing sleeves 10 on both sides of the auxiliary fixing frame 1 that match the cable 2. An adjusting sleeve 11 is provided on the side of the fixing sleeve 10 away from the auxiliary fixing frame 1. An adjusting nut 12 is fitted onto the outer wall of the adjusting sleeve 11. A sliding pressure sleeve 13 is fitted onto the outer wall of the fixing sleeve 10, and the sliding pressure sleeve 13 is fixedly connected to the adjusting nut 12. The fixing sleeve 10 has a plurality of mounting holes 14 arranged in a circumferential array. An elastic piece 15 is provided in each mounting hole 14, and a pressure block 16 that abuts against the cable 2 is provided on one side of the elastic piece 15. A threaded groove 17 matching the adjusting nut 12 is provided on the outer wall of the adjusting sleeve 11.

[0026] In practical applications, when connecting two sets of cables 2, first, one end of one set of cables 2 is inserted into the auxiliary fixing bracket 1 through the adjusting sleeve 11 and the fixing sleeve 10 respectively. Then, the adjusting nut 12 is rotated. The adjusting nut 12 is threadedly connected to the adjusting sleeve 11. When the adjusting nut 12 rotates, it will drive the sliding pressure sleeve 13 to move closer to the fixing sleeve 10 until the sliding pressure sleeve 13 covers the fixing sleeve 10. During this process, the sliding pressure sleeve 13 will squeeze the elastic sheet 15. The elastic sheet 15 being squeezed will drive the pressure block 16 to squeeze the outer wall of the cable 2 and limit its position. Then, another set of cables 2 is inserted into the auxiliary fixing frame 1 from the other side of the auxiliary fixing frame 1, as described above. After the two sets of cables 2 are fixed, the structures of the two sets of cables 2 are connected by tape 3. By setting the auxiliary fixing frame and auxiliary clamping assembly, the two sets of cables can be fixed when they are connected, preventing the tape from tearing and improving the connection stability. The auxiliary clamping assembly is simple and convenient to use because it cooperates with the sliding pressure sleeve to squeeze the elastic sheet. By setting the buffer layer, the internal core of the cable can be prevented from being damaged by the compression, further improving its safety.

[0027] In summary, by means of the above-mentioned technical solution of this utility model, the auxiliary fixing frame and auxiliary clamping assembly can be used to fix the two sets of cables when they are connected, preventing the tape from tearing and improving the connection stability. Furthermore, the auxiliary clamping assembly is simple and convenient to use because it cooperates with the sliding pressure sleeve to squeeze the elastic sheet. The buffer layer can prevent the cable from being squeezed and causing damage to the internal cable core, further improving its safety.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-smoke, halogen-free, flame-retardant twisted-pair special cable, characterized in that, The device includes two sets of cables (2), with an auxiliary fixing frame (1) between the two sets of cables (2). The two sets of cables (2) extend into the auxiliary fixing frame (1) on their adjacent sides and are connected by tape (3). The auxiliary fixing frame (1) has auxiliary clamping components on both sides that match the two sets of cables (2). The cable (2) includes an insulation layer (4), which contains several evenly distributed cable cores (5). The outer wall of the insulation layer (4) is fitted with a buffer layer (6), the outer wall of the buffer layer (6) is fitted with a flame-retardant layer (7), the outer wall of the flame-retardant layer (7) is fitted with a waterproof layer (8), and the outer wall of the waterproof layer (8) is fitted with a low-smoke halogen-free layer (9).

2. The low-smoke halogen-free flame-retardant twisted-pair special cable according to claim 1, characterized in that, The insulating layer (4) is made of polyvinyl chloride.

3. The low-smoke halogen-free flame-retardant twisted-pair special cable according to claim 1, characterized in that, The flame-retardant layer (7) is made of glass fiber.

4. The low-smoke halogen-free flame-retardant twisted-pair special cable according to claim 1, characterized in that, The auxiliary clamping assembly includes a fixing sleeve (10) on both sides of the auxiliary fixing frame (1) that matches the cable (2). An adjusting sleeve (11) is provided on the side of the fixing sleeve (10) away from the auxiliary fixing frame (1). An adjusting nut (12) is fitted on the outer wall of the adjusting sleeve (11). A sliding pressure sleeve (13) is fitted on the outer wall of the fixing sleeve (10). The sliding pressure sleeve (13) is fixedly connected to the adjusting nut (12). The fixing sleeve (10) has a plurality of mounting holes (14) arranged in a circumferential array. An elastic piece (15) is provided in the mounting hole (14). A pressure block (16) that abuts against the cable (2) is provided on one side of the elastic piece (15).

5. A low-smoke, halogen-free, flame-retardant twisted-pair special cable according to claim 4, characterized in that, The outer wall of the adjusting sleeve (11) is provided with a threaded groove (17) that matches the adjusting nut (12).

6. A low-smoke, halogen-free, flame-retardant twisted-pair special cable according to claim 4, characterized in that, The pressure block (16) is provided with an anti-slip pad on the side near the cable (2).

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