Drag chain cable for dust-free workshop
By adopting a multi-layer structural design in the drag chain cable, including a nylon wire braided layer and a sheath layer of specific materials, the problems of dust peeling and core wire friction damage caused by wear of traditional drag chain cables are solved, and the cable life is achieved significant extension and dust-free environment maintenance.
Patent Information
- Application Number
- CN202421283462.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-06
AI Technical Summary
During long-term use of traditional drag chain cables, wear of the sheath material will cause dust to fall off, affecting the dust-free environment. At the same time, the friction between the core wire and the sheath will cause damage to the core wire, shortening the cable life.
Adopt a structural design from the inside to the outside, including a central filler strip, core wire, first nylon wire braided layer, sheath layer and second nylon wire braided layer. The sheath layer is protected by the second nylon wire braided layer to prevent powder loss , and the friction between the core wire and the sheath layer is isolated by the first nylon wire braided layer.
Effectively prevent dust from falling off caused by friction between the sheath layer and external items, protect the core wire from friction damage, significantly extend the life of the cable to more than 5 million times, and maintain the dust-free environment of the workshop.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cables and relates to a tow chain cable. Background Art
[0002] With the continuous improvement of the level of modern industrial automation, the manufacturing process of electronic products has become more and more sophisticated. In addition, the medical industry has strict requirements for a sterile and dust-free environment. Ensuring high standards of cleanliness in the production process has become the key. In this context, cables, especially drag chain cables used in automation equipment, not only need to have a long life to cope with frequent mechanical movements, but also must ensure that no dust is generated during use, so as not to affect the dust-free environment of the workshop.
[0003] Traditional industrial drag chain cable sheath materials, such as polyvinyl chloride (PVC), thermoplastic polyurethane (TPU) and thermoplastic elastomer (TPE), although excellent in durability and flexibility, will fall off in the form of dust or tiny particles due to surface wear under long-term dragging and bending operations. Once these tiny substances are suspended in the air, they will inevitably lead to a decline in the dust-free index in the workshop. In addition, in order to improve the bending performance of the drag chain cable, the sheath is often used to directly protect the core wire, which causes friction between the core wire insulation and the sheath, damaging the core wire and causing the life of the drag chain to decrease. Utility Model Content
[0004] In view of the defects of the prior art, the task of the utility model is to provide a drag chain cable for a dust-free workshop to solve the problems of sheath friction dust and short cable life.
[0005] Technical solution: The utility model is a drag chain cable for a dust-free workshop, comprising a central filling strip, a core wire, a first nylon braided layer, a sheath layer and a second nylon braided layer from the inside to the outside, wherein the core wire is provided with a plurality of strips and arranged around the central filling strip, wherein the core wire comprises a conductor and an insulating layer coated on the conductor, and the conductor is formed by S-twisting of conductor single wires and then S-back-twisting and re-twisting.
[0006] Furthermore, the twisting pitch during the S-direction bundle twisting is 25 to 30 times of the twisting outer diameter, and the twisting pitch during the S-direction back-twisting and re-twisting is 14 to 16 times of the twisting outer diameter.
[0007] Furthermore, the conductor monofilament is a Category 6 conductor soft copper wire with a diameter of 0.10±0.02 mm.
[0008] Furthermore, the core wires are twisted in groups, the twisting direction of the core wires is in the Z direction, and the twisting pitch of the core wires is 10 to 12 times the twisting outer diameter.
[0009] Furthermore, the central filling strip is a nylon wire twisted into multiple strands.
[0010] Furthermore, the braiding density of the first nylon braided layer is greater than 80%.
[0011] Furthermore, the braiding density of the second nylon braided layer is greater than 90%, and the single nylon wire diameter is not less than 0.3 mm.
[0012] Furthermore, the material of the insulating layer is TPEE, and the material of the sheath layer is TPU.
[0013] The advantages of the utility model compared with the prior art are:
[0014] The second nylon braided layer protects the sheath layer to prevent the sheath layer from rubbing against other external parts and causing powder to fall off. The first nylon braided layer isolates the core wire from the sheath layer, which isolates the friction between the core wire and the sheath during movement, protecting the core wire from friction damage. At the same time, the core wire is arranged around the central filling strip to expand the core wire, which can enhance the bending and torsion resistance of the cable, and the cable drag chain life reaches more than 5 million times. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0016] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.
[0017] like Figure 1 As shown, the embodiment of the utility model relates to a drag chain cable for a dust-free workshop, comprising a central filling strip 1, a core wire 2, a first nylon braided layer 3, a sheath layer 4 and a second nylon braided layer 5 from the inside to the outside, wherein the core wire 2 is composed of a conductor 2a and an insulating layer 2b coated on the conductor 2a, and the conductor 2a is formed by first S-direction bundle twisting of a conductor monofilament made of Category 6 conductor soft copper wire and then S-direction back-twisting and re-twisting. Six core wires 2 are provided and arranged around the central filling strip 1. The first nylon braided layer 3 isolates the core wire 2 from the sheath layer 4, and the second nylon braided layer 5 is wrapped outside the sheath layer 4 to reduce friction.
[0018] The following is an explanation of the structure of a specific drag chain cable for a dust-free workshop.
[0019] The central filling strip 1 is made of nylon wire and is twisted into multiple strands for filling. The central filling strip 1 is located in the center, and the core wire 2 is arranged around it and stretched, which can enhance the bending resistance and torsion resistance of the cable.
[0020] The conductor 2a of the core wire 2 is made of soft copper wire of Category 6 conductor, and the diameter of the conductor single wire is 0.10mm. The conductor single wire is first twisted into 7 strands of 28 strands in the S direction. The twisting pitch during the S direction twisting is 25 to 30 times the twisting outer diameter, and then the 7 strands are back-twisted and re-twisted in the S direction. A cabling machine with a back-twisting device is used during the re-twisting to eliminate the stress generated during the re-twisting, making the wire more round and soft, and making the conductor 2a have excellent bending and torsion resistance. The twisting pitch during the S direction back-twisting and re-twisting is 14 to 16 times the twisting outer diameter. The conductor 2a has good flexibility and can reduce the bending radius of the cable.
[0021] The material of the insulation layer 2b of the core wire 2 is high-strength and wear-resistant TPEE, and its specific parameters are suitable fixed working temperature of -40~105℃, mobile working temperature of -20~90℃, and volume resistivity of ≥1.0×10 16 , tensile strength ≥ 25MPa, elongation at break ≥ 500%. The thickness of the insulation layer 2b is set according to the voltage, and thin-wall insulation is used as much as possible to minimize the outer diameter of the cable.
[0022] The core wires 2 are twisted in groups when being cabled, and the twisting direction of each group of core wires 2 is in the Z direction, so that the internal stress of each group of core wires 2 offsets each other to maintain the balance of force. The twisting cage twisting machine is used for twisting, which reduces the stress between the core wires 2 and the burden on the conductor. When being cabled, the twisting pitch of the core wire 2 is 10 to 12 times the twisting outer diameter.
[0023] The braiding density of the first nylon braided layer 3 between the core wire 2 and the sheath layer 4 is greater than 80%, which plays a role in protecting the core wire. The material selected for the sheath layer 4 is a lubricating TPU sheath, with a suitable fixed working temperature of -40 to 85°C and a mobile working temperature of -20 to 80°C. The tensile strength is ≥20MPa, the elongation at break is ≥300%, and the material hardness is 82A, which ensures the flexibility of the cable. The braiding density of the second nylon braided layer 5 outside the sheath layer 4 is greater than 90%, and the single wire diameter of the nylon wire is not less than 0.3mm. After 5 million times of drag chain, the nylon wire is guaranteed to rub against other objects continuously, thereby protecting the sheath layer 4 from friction and powdering. It can meet the requirements of the drag chain equipment to complete medium-speed and long-distance mobile operations, providing a basic guarantee for industrial production efficiency and work safety.
Claims
1. A drag chain cable for a dust-free workshop, characterized in that: It includes a central filling strip, a core wire, a first nylon wire braided layer, a sheath layer and a second nylon wire braided layer from the inside to the outside. The core wire is provided with a plurality of strips and is arranged around the central filling strip. The core wire includes a conductor and an insulating layer covering the conductor. The conductor is made by S-direction bundle twisting of conductor single wires and then S-direction back-twisting and re-twisting.
2. The drag chain cable for a clean room according to claim 1, characterized in that: The twisting pitch during the S-direction bundle twisting is 25 to 30 times of the twisting outer diameter, and the twisting pitch during the S-direction back-twisting and re-twisting is 14 to 16 times of the twisting outer diameter.
3. The drag chain cable for a clean room according to claim 1, characterized in that: The conductor monofilament is a Category 6 conductor soft copper wire with a diameter of 0.10±0.02mm.
4. The drag chain cable for a clean room according to claim 1, characterized in that: The core wires are twisted in groups, the twisting direction of the core wires is in the Z direction, and the twisting pitch of the core wires is 10 to 12 times the twisting outer diameter.
5. The drag chain cable for a clean room according to claim 1, characterized in that: The central filling strip is a nylon wire twisted into multiple strands.
6. The drag chain cable for a clean room according to claim 1, characterized in that: The braiding density of the first nylon braided layer is greater than 80%.
7. The drag chain cable for a clean room according to claim 1, characterized in that: The braiding density of the second nylon braided layer is greater than 90%, and the single nylon wire diameter is not less than 0.3 mm.
8. The drag chain cable for a clean room according to claim 1, characterized in that: The material of the insulating layer is TPEE, and the material of the sheath layer is TPU.