Ladder arc type insulation composite cable

Abstract

The utility model discloses a ladder arc type insulation composite cable, comprising a cable core and a sheath which are successively arranged from inside to outside, the cable core comprises a first main wire core with a circular cross section, a second main wire core with a ladder arc cross section, an auxiliary wire core and a function unit, the first main wire core is arranged at the center of the cable core, and the second main wire core is arranged at the center of the cable core. The cross sections of the second main wire core, the auxiliary wire core and the functional unit are equal and are adjacently arranged in the circumferential direction of the first main wire core. According to the utility model, the cross sections of the other wire cores surrounding the main wire core are all optimized into ladder arcs from traditional circles, so that the wire cores are naturally spliced into an annular structure, the main wire core in the center is wrapped, the outer ring is more round, various wire cores are fully spaced, the problems of interference and the like are avoided, and the comprehensive cable is enabled to give full play to the use performance, and the service life of the comprehensive cable is prolonged. And the safety and the practicability are improved.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a trapezoidal arc-shaped insulated composite cable. Background Technology

[0002] With the steady and rapid pace of economic development and continuous optimization of the economic structure, the momentum of high-quality development of various projects and equipment is becoming increasingly evident. As society develops towards intelligence and diversification, the usage and requirements for cables are also increasing. Especially in situations requiring integrated cables, the conventional use of separate power, control, and instrument cables leads to problems such as tangling and low space utilization. Therefore, integrated cables are being considered for single-use, safe, and convenient applications.

[0003] Composite cables, also known as multi-functional cables or hybrid cables, are designs that integrate multiple different types of conductors into a single cable. These cables can simultaneously transmit multiple information such as power, data signals, and control signals, making them suitable for applications requiring multiple types of connections simultaneously. The design purpose of composite cables is to reduce wiring space, simplify the installation process, and improve system reliability and maintainability. Currently, in the cable technology field, insulated cores are mostly produced using a circular extrusion method. During the cabling process of multi-core cables, a filling method is used to make the cable round. However, because composite cables contain many cores with different cross-sectional areas, the roundness after cabling is poor. After filling, the distribution of the cores is uneven, which can easily cause interference. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a trapezoidal arc-shaped insulated composite cable. This cable ensures complete roundness after cabling, and that the various cores are sufficiently spaced to avoid interference and other problems. As a result, the composite cable can fully perform its function and improve its safety and practicality.

[0005] The technical solution to achieve the purpose of this utility model is:

[0006] A trapezoidal arc-shaped insulated composite cable includes a cable core and a sheath arranged sequentially from the inside to the outside. The cable core includes a first main conductor with a circular cross-section, a second main conductor with a trapezoidal arc cross-section, an auxiliary conductor, and a functional unit. The first main conductor is located at the center of the cable core. The second main conductor, the auxiliary conductor, and the functional unit have equal cross-sections and are arranged adjacent to each other along the circumference of the first main conductor.

[0007] Furthermore, the conductors of the first main conductor, the second main conductor, and the auxiliary conductor are all formed by twisting and re-twisting multiple annealed bare copper wire bundles. The conductors are sequentially surrounded by a wrapping layer and insulation, and the insulation forms conductors with different cross-sectional shapes.

[0008] Furthermore, the wrapping layer is a polyester nonwoven fabric with an overlap rate of not less than 10%.

[0009] Furthermore, the functional unit is one or more combinations of an optical cable unit, a control unit, and an instrument line unit.

[0010] Furthermore, the optical cable unit includes an optical fiber unit and a high-temperature resistant sheath with a trapezoidal cross-section that wraps around the optical fiber unit. The optical fiber unit includes a reinforcing layer and multiple stranded optical units within the reinforcing layer. The optical unit includes an optical fiber and a high-temperature resistant loose tube sleeved outside the optical fiber.

[0011] Furthermore, the reinforcing layer is a braided reinforcing layer made of aramid fibers.

[0012] Furthermore, the control unit includes multiple control insulated wire cores arranged in a regular pattern and a wrapping tape wrapped around the control insulated wire cores, with a chlorinated polyethylene rubber sheath with a trapezoidal cross-section pressed onto the wrapping tape.

[0013] Furthermore, the instrument wire unit includes a braided shielding layer and multiple stranded instrument insulating wire cores disposed within the braided shielding layer, and a chlorinated polyethylene rubber sheath with a trapezoidal cross-section is extruded outside the braided shielding layer.

[0014] Furthermore, the sheath is provided with a woven layer, and the woven layer is coated with an asphalt layer.

[0015] Furthermore, the sheath is made of chlorinated polyethylene rubber material.

[0016] Furthermore, the braided layer is an aramid fiber braided reinforcement layer, thereby ensuring that the cable has strong overall tensile strength during use.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects:

[0018] (1) This utility model optimizes the cross-section of the remaining cores surrounding the main core from a traditional circle to a trapezoidal arc shape, thereby naturally forming a ring structure. This wraps around the main core in the center, making the outer ring more rounded, and the various cores are sufficiently spaced to avoid interference and other problems. This allows the composite cable to fully perform its function and improve its safety and practicality.

[0019] (2) Both the main core and the auxiliary core of this utility model are made of annealed bare copper wire bundles twisted and re-stretched to form conductors, which improves the conductivity while ensuring a small degree of bending of the cable.

[0020] (3) This utility model uses polyester non-woven fabric as the wrapping layer, which has good mechanical strength and wear resistance, can effectively protect the internal structure of the wire core from external physical damage, and improves the electrical safety of the entire wire core to a certain extent.

[0021] (4) This utility model provides a combination of multiple functional units to meet different usage needs.

[0022] (5) By setting a braided layer and an asphalt layer outside the braided layer, this utility model ensures corrosion resistance and wear resistance during use, and guarantees the continuity and safety of cable power supply. Attached Figure Description

[0023] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] The labels in the attached diagram are:

[0026] 1. Sheath; 2. First main core; 3. Second main core; 4. Auxiliary core; 5. Optical cable unit; 5. Optical fiber unit; 5-1. High temperature resistant sheath; 5-2. Control unit; 6. Instrument line unit; 7. Braided shielding layer; 7-1. Braided layer; 8. Asphalt layer; 9. Detailed Implementation

[0027] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0028] (Example 1)

[0029] like Figure 1 The trapezoidal arc-shaped insulated composite cable shown includes a cable core and a sheath 1 arranged sequentially from the inside out. The cable core includes a first main conductor 2 with a circular cross-section, a second main conductor 3 with a trapezoidal arc cross-section, auxiliary conductors 4, and functional units. The first main conductor 2 is located at the center of the cable core. The second main conductor 3, auxiliary conductors 4, and functional units have equal cross-sections and are arranged adjacent to each other circumferentially along the first main conductor 2. By optimizing the traditional circular cross-section conductors into trapezoidal arc cross-section conductors, a natural ring structure is formed, which wraps around the central main conductor while making the outer ring more rounded. Furthermore, the various conductors are sufficiently spaced to avoid interference and other problems, thus allowing the composite cable to fully utilize its performance and improve safety and practicality.

[0030] Specifically, the first main core 2 is provided with one wire, the second main core 3 and the auxiliary core 4 are each provided with two wires, and the functional unit is one or more combinations of optical cable unit, control unit and instrument line unit. In this embodiment, there are four functional units, namely one optical cable unit 5, one control unit 6 and two instrument line units 7.

[0031] The conductors of the first main core 2, the second main core 3, and the auxiliary core 4 are all made of multiple annealed bare copper wire bundles twisted together, meeting the resistance requirements of Class 6 conductors in the standard, thus improving conductivity while ensuring minimal cable bending. The conductors are successively covered with a wrapping layer and insulation. The wrapping layer is a layer of polyester non-woven fabric with an overlap rate of not less than 10%, possessing good mechanical strength and abrasion resistance, effectively protecting the internal structure of the core from external physical damage, and improving the overall electrical safety of the core to a certain extent. The first main core 2 has a circular insulation structure, while the second main core 3 and the auxiliary core 4 have a trapezoidal arc-shaped insulation structure. The insulation is preferably 125℃ EPDM rubber insulation, which has excellent heat resistance and electrical insulation properties, is anti-aging, and has good flexibility. The insulation allows for the formation of cores with different cross-sectional shapes, simplifying the manufacturing process.

[0032] The optical cable unit 5 includes an optical fiber unit 5-1 and a high-temperature resistant sheath 5-2 with a trapezoidal cross-section that wraps around the optical fiber unit 5-1. The optical fiber unit 5-1 includes a reinforcing layer and four bundled optical units located within the reinforcing layer. The reinforcing layer is a braided reinforcing layer made of aramid fibers. Each optical unit includes an optical fiber and a high-temperature resistant loose tube sleeved outside the optical fiber.

[0033] The control unit 6 includes control insulated wire cores arranged in a 1+6 regular pattern and a wrapping tape wrapped around the control insulated wire cores. The control insulated wire cores are cabled with a pitch ratio of 12 to 14. A chlorinated polyethylene rubber sheath with a trapezoidal cross section is extruded outside the wrapping tape.

[0034] The instrument line unit 7 includes a braided shielding layer 7-1 and three twisted instrument insulating wire cores disposed within the braided shielding layer. A chlorinated polyethylene rubber sheath with a trapezoidal cross-section is extruded outside the braided shielding layer.

[0035] The conductors of the control and instrumentation units are all made of annealed bare copper wire with excellent conductivity and are processed by stranding. The conductor resistance meets the requirements of Class 5 conductors in the standard, ensuring that the small core conductors have sufficient tensile strength and bending flexibility during use.

[0036] Sheath 1 is made of chlorinated polyethylene rubber material and is extruded. Considering the roundness of the cable core, the nominal thickness of the sheath is (0.035*D+1)mm, where D is the assumed diameter of the cable before extrusion. Under the premise of ensuring performance, the cost of the sheath can be effectively optimized. The sheath is provided with a braided layer 8, which is a braided reinforcement layer of aramid fiber with a braiding density of not less than 50%, thereby ensuring that the overall tensile strength of the cable is strong during use. The braided layer is coated with an asphalt layer 9 to ensure corrosion resistance and wear resistance during use, and to ensure the continuity and safety of the cable power supply.

[0037] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A trapezoidal arc-shaped insulated composite cable, characterized in that: The cable core and sheath are arranged sequentially from the inside out. The cable core includes a first main core with a circular cross-section, a second main core with a trapezoidal cross-section, an auxiliary core, and a functional unit. The first main core is located at the center of the cable core. The second main core, the auxiliary core, and the functional unit have equal cross-sections and are arranged adjacent to each other along the circumference of the first main core.

2. The trapezoidal arc-shaped insulated composite cable according to claim 1, characterized in that: The conductors of the first main conductor, the second main conductor, and the auxiliary conductor are all made of multiple annealed bare copper wire bundles twisted together. The conductors are wrapped with a layer and insulation in sequence, and the insulation forms conductors with different cross-sectional shapes.

3. The trapezoidal arc-shaped insulated composite cable according to claim 2, characterized in that: The wrapping layer is a layer of polyester nonwoven fabric with an overlap rate of not less than 10%.

4. The trapezoidal arc-shaped insulated composite cable according to claim 1, characterized in that: The functional unit is one or more combinations of optical cable unit, control unit, and instrument line unit.

5. A trapezoidal arc-shaped insulated composite cable according to claim 4, characterized in that: The optical cable unit includes an optical fiber unit and a high-temperature resistant sheath with a trapezoidal cross-section that wraps around the optical fiber unit. The optical fiber unit includes a reinforcing layer and multiple stranded optical units within the reinforcing layer. The optical unit includes an optical fiber and a high-temperature resistant loose tube sleeved outside the optical fiber.

6. A trapezoidal arc-shaped insulated composite cable according to claim 4, characterized in that: The control unit includes multiple control insulated wire cores arranged in a regular pattern and a wrapping tape wrapped around the control insulated wire cores. The wrapping tape is covered with a chlorinated polyethylene rubber sheath with a trapezoidal cross-section.

7. The trapezoidal arc-shaped insulated composite cable according to claim 4, characterized in that: The instrument wire unit includes a braided shielding layer and multiple stranded instrument insulating wire cores disposed within the braided shielding layer. The braided shielding layer is covered with a chlorinated polyethylene rubber sheath with a trapezoidal cross-section.

8. The trapezoidal arc-shaped insulated composite cable according to claim 1, characterized in that: The sheath has a woven layer on the outside, and the woven layer is coated with an asphalt layer.

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