High temperature drag chain cable

Abstract

The utility model discloses a high temperature towed chain cable, including from inside to outside central filling strip, core line and sheath layer, the core line is equipped with several and surrounds the central filling strip setting, the core line includes conductor and the insulating layer of cladding in conductor, the sheath layer includes braided layer and coating layer, the braided layer adopts glass fiber material and is knitted into, and the braided density is greater than 90%, the coating layer is the adhesive layer of thickness 0.15 0.02mm. The utility model discloses a high temperature towed chain cable can be towed chain under 200 DEG C to 250 DEG C high temperature, and the sheath is not easy to crack, and the towed chain life reaches 5 million times or more.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology and relates to a high-temperature drag chain cable. Background Technology

[0002] Due to market demand, some cables are used in cable chain operations at temperatures up to 200°C. High-temperature industrial environments are frequently encountered in production, such as in the smelting, ironmaking, and steelmaking industries; casting and forging in the machinery industry; machining workshops; ceramics, glass, and brick manufacturing; various engineering projects; and ship boiler rooms. In these high-temperature environments, cables require resistance to acids and alkalis, oils, chemicals, microorganisms, and ultraviolet radiation, as well as good mobility. Generally, plastic is used for the sheath material, but most plastic materials cannot reach the rated temperature of 250°C. While fluoropolymer materials are acceptable as core wires, using them as sheaths would make the cable too rigid, increasing the bending radius. A small bending radius poses a risk of cracking in high-temperature environments.

[0003] Therefore, there is currently a product gap in the market for drag chain cables that can operate at high temperatures of 200℃ to 250℃ while maintaining flexibility and a small bending radius. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a high-temperature drag chain cable to solve the problems of existing cables that cannot operate at high temperatures of 200℃ to 250℃, and that have large bending radii, high sheath hardness, and are prone to cracking.

[0005] Technical solution: This utility model discloses a high-temperature drag chain cable, comprising a central filler strip, core wires, and a sheath layer from the inside out. The core wires are arranged in a plurality of strands around the central filler strip. Each core wire includes a conductor and an insulation layer covering the conductor. The sheath layer includes a braided layer and a coating layer. The braided layer is made of glass fiber material with a braiding density greater than 90%. The coating layer is an adhesive layer with a thickness of 0.15±0.02mm.

[0006] Furthermore, the central filler strip is made of glass fiber material.

[0007] Furthermore, the insulating layer is made of polytetrafluoroethylene (PTFE).

[0008] Furthermore, the conductor is a Category 6+ nickel-plated copper conductor.

[0009] Furthermore, the conductor is composed of 7 strands of 28 conductor monofilaments that are bundled together in the S direction and then untwisted and re-twisted in the S direction.

[0010] Furthermore, the diameter of the conductor monofilament is 0.10±0.02mm.

[0011] Furthermore, the stranding pitch is 10 times the stranding outer diameter, and the stranding direction is consistent with the stranding direction of the conductor.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. The high temperature drag chain cable of the present invention can be dragged at a high temperature of 200℃ to 250℃, and the life reaches more than 5 million cycles when the drag chain speed is less than 1 m / s and the drag chain stroke is less than 3 meters.

[0013] 2. The sheath layer is made of fiberglass braided material and coated with an adhesive layer. Fiberglass itself is a high-temperature resistant material, which can protect the core wire and make the cable more flexible. The coating layer on the outside of the braided layer can fix the braided layer while resisting high temperature and prevent the fiberglass braided layer from loosening during movement.

[0014] 3. This utility model can effectively improve the wear resistance and mechanical properties of the cable, reduce friction with other sheaths in the tank chain, and reduce the probability of cable bending deformation and breakage.

[0015] 4. Reasonable selection of cabling pitch and cabling direction ensures stress balance between core wires and high mechanical strength and fatigue resistance, which can meet the requirements of drag chain equipment to complete medium-speed long-distance moving operations, providing a basic guarantee for industrial production efficiency and work safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0018] like Figure 1 As shown, the high-temperature drag chain cable of this embodiment includes a central filler strip 3, core wires, and a sheath layer from the inside out. Several core wires are arranged around the central filler strip 3. Each core wire includes a conductor 1 and an insulation layer 2 covering the conductor. The sheath layer includes a braided layer 4 and a coating layer 5. The braided layer 4 is made of glass fiber material and the braiding density is greater than 90%. The coating layer 5 is an adhesive layer with a thickness of 0.15±0.02mm. Specifically, a resin adhesive that can withstand temperatures above 250℃ can be selected from the prior art.

[0019] In one embodiment, conductor 1 is an IEC 60228 Category 6+ nickel-plated copper conductor, 1.5mm thick. 2The conductor structure is 196 / 0.10, with a single wire diameter of 0.10mm. First, 7 strands with 28 S-direction strands are bundled together. Finally, the remaining 7 strands are re-stranded in a regular structure. The cabling machine used for re-stranding is equipped with a de-twisting device to eliminate stress generated during re-stranding, making the wire more rounded and flexible, giving conductor 1 excellent bending and torsional resistance. The conductor re-stranding method is as follows: the outer diameter of the 7 strands is approximately 18-20 times that of the stranded outer diameter, and the outer diameter of the re-stranded outer diameter is approximately 12-14 times. Furthermore, the re-stranding is regular, with both the 7 strands and the re-stranded strands twisted in an S-direction, improving the flexibility of conductor 1 while reducing the cable's bending radius.

[0020] In one embodiment, the insulating layer 2 is made of polytetrafluoroethylene (PTFE). The insulating PTFE is first prepared by mixing different materials, with different formulations for different colors. One such formulation is as follows: 500g PTFE + 100g gasoline + 1.2g color powder. The raw materials are sieved, lubricant is prepared, the mixture is mixed, aged, pre-formed, extruded, evaporated, sintered, and the finished product is obtained.

[0021] In one embodiment, the cable assembly process is as follows: During cabling, glass fiber material is added to the center to form a central filler strip 3. Because glass fiber has excellent properties such as good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength, it can make the cable structure more rounded and effectively reduce the friction between core wires during bending, preventing damage to the core wires. It also does not become brittle at high temperatures. The cable assembly uses a cage stranding design, which not only considers improving bending performance but also suppresses the phenomenon of wires twisting together when used in equipment. The cable products abandon the non-untwisting method used in general wires and adopt a special-function cage stranding machine, reducing the burden on the conductor. In addition, a reasonable cable stranding pitch (10 times the outer diameter of the stranding) and the stranding direction are in the same direction as the conductor 1. Before stranding, it is confirmed that the tension of the coil is uniform to prevent excessive or insufficient tension.

[0022] In one embodiment, the braided layer 4 is made of wave fiber material with a braiding density greater than 90%, which isolates the core wire from the sheath. During movement, the friction between the core wire and the sheath is isolated, improving the wear resistance and strength of the core wire and protecting the core wire.

[0023] In one embodiment, the fiberglass braided layer 4 is prone to loosening during movement, so a coating layer 5 is provided outside the braided layer 4. The specific preparation method is to coat the braided layer 4 with high-temperature adhesive, and to perform 2-3 coatings to ensure that the thickness of the high-temperature adhesive reaches about 0.15mm. The preparation steps are: coating, baking, evaporation, and finished product.

Claims

1. A high-temperature drag chain cable, comprising a central filler strip, core wires, and a sheath layer from the inside out, wherein a plurality of core wires are arranged around the central filler strip, and each core wire includes a conductor and an insulation layer covering the conductor, characterized in that, The sheath layer includes a braided layer and a coating layer. The braided layer is made of fiberglass material with a braiding density greater than 90%. The coating layer is an adhesive layer with a thickness of 0.15±0.02mm.

2. The high-temperature drag chain cable according to claim 1, characterized in that, The central filler strip is made of fiberglass.

3. The high-temperature drag chain cable according to claim 1, characterized in that, The insulating layer is made of polytetrafluoroethylene.

4. The high-temperature drag chain cable according to claim 1, characterized in that, The conductor is a Category 6+ nickel-plated copper conductor.

5. The high-temperature drag chain cable according to claim 4, characterized in that, The conductor is composed of 7 strands of 28 conductor monofilaments that are bundled together in the S direction and then untwisted and re-twisted in the S direction.

6. The high-temperature drag chain cable according to claim 5, characterized in that, The diameter of the conductor filament is 0.10±0.02mm.

7. The high-temperature drag chain cable according to claim 1, characterized in that, The stranding pitch is 10 times the outer diameter of the strand, and the stranding direction is consistent with the stranding direction of the conductor.

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