CN217767868U - Rubber jacketed flexible cable for tower crane - Google Patents
Rubber jacketed flexible cable for tower crane Download PDFInfo
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- CN217767868U CN217767868U CN202221277276.0U CN202221277276U CN217767868U CN 217767868 U CN217767868 U CN 217767868U CN 202221277276 U CN202221277276 U CN 202221277276U CN 217767868 U CN217767868 U CN 217767868U
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Abstract
A rubber jacketed flexible cable for a tower crane is structurally characterized in that a cable core is formed by stranding a plurality of wire cores, and an outer sheath is coated outside the cable core; the outer sheath is made of rubber sheath material; the wire core comprises a power wire core and a neutral wire core; the power wire core and the neutral wire core are both formed by wrapping insulating layers outside copper conductors, and the power wire core and the neutral wire core are characterized by also comprising a ground wire core, wherein the ground wire core is formed by wrapping insulating layers outside the copper conductors; the insulating layers of the power wire core, the ground wire core and the neutral wire core are all made of ethylene propylene rubber insulating materials; gaps are reserved among the power wire cores; the ground wire core and the neutral wire core are distributed on the opposite sides of the power wire core, and the ground wire core and the neutral wire core are respectively attached to the adjacent power wire cores; the gaps among the power wire cores are filled with rubber sheathing materials, and the gaps between the ground wire cores and the neutral wire cores adjacent to the power wire cores are filled with the rubber sheathing materials; for the copper conductors in the power wire core, the power wire core and the ground wire core, the copper conductor is a conductor formed by the 5 th soft copper, and the copper conductor is formed by bundling and twisting soft round copper wires.
Description
Technical Field
The utility model relates to a tower machine is with rubber cover flexible cable belongs to cable technical field.
Background
The tower crane is the most common hoisting equipment on the construction site and is also indispensable equipment. The special cable for the tower crane is generally used for transmitting three-phase alternating current. The grounding of field electrical devices is generally a device end in the field with a buried ground wire. Because the environment of the construction site is complex, the buried ground wires of all the devices are easily influenced by the change of the site geological environment, and poor grounding is caused. In order to make the grounding of each power utilization point of the on-site tower crane equipment consistent, a special grounding wire is mostly adopted and connected with the grounding of each power utilization point. This entails the problem that additional cabling is required.
Meanwhile, the cable special for the tower crane needs to be frequently bent, and a rubber sleeve cable can be adopted to ensure the flexibility of the cable. The disadvantages of this type of cable are mainly: because the conductor is tightly wrapped, frequent bending easily causes fatigue of conductor materials, and the service life is influenced. Meanwhile, the tower crane cable is required to have better cold resistance, wear resistance and oil resistance in the use environment.
Disclosure of Invention
The utility model aims at solving the above technical problem, provide a tower machine rubber cover flexible cable, its power supply needs that not only need satisfy the tower machine still need have characteristics such as cold-resistant, wear-resisting, resistant oily, tensile, soft, good bending property, ensure the electrical safety in the use.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
the rubber jacketed flexible cable for the tower crane can meet the use requirement of the range of 21.0 mm-50.0 mm of outer diameter.
A tower machine rubber jacketed flexible cable, its structure is:
a cable core is formed by twisting a plurality of wire cores, and an outer sheath is coated outside the cable core; the pitch-diameter ratio of the cable core twisting is not more than 12 times; the outer sheath is made of rubber sheath material;
the wire cores are divided into a power wire core, a ground wire core and a neutral wire core;
the power wire core is formed by wrapping an insulating layer outside a copper conductor, the thickness of the insulating layer is 1.2-1.6 mm, and the sectional area of the copper conductor is 10-70 mm 2 ；
The ground wire core is formed by wrapping an insulating layer outside a copper conductor, the thickness of the insulating layer is 1.0-1.6 mm, and the sectional area of the copper conductor is 6-50 mm 2 ；
The neutral wire core is formed by wrapping an insulating layer outside a copper conductor, the thickness of the insulating layer is 1.0-1.6 mm, and the sectional area of the copper conductor is 6-50 mm 2 ；
The insulating layers of the power wire core, the ground wire core and the neutral wire core are all made of ethylene propylene rubber insulating materials;
gaps are reserved among the power wire cores; the ground wire core and the neutral wire core are distributed on the opposite sides of the power wire core, and the ground wire core and the neutral wire core are respectively attached to the adjacent power wire cores; the gaps among the power wire cores are filled with rubber sheathing materials, and the gaps between the ground wire cores and the neutral wire cores adjacent to the power wire cores are filled with the rubber sheathing materials;
for the copper conductors in the power wire core, the power wire core and the ground wire core, the copper conductor is a conductor formed by the 5 th soft copper, the copper conductor is formed by bundling and twisting soft round copper wires, the bundling pitch diameter ratio of the soft round copper wires is 25-30 times, and the twisting pitch diameter ratio is 10-20 times; the wire diameter of the soft round copper wire is 0.4-0.5 mm;
the distance from the outer wall of the outer sheath to the outer wall of the power wire core, the outer wall of the power wire core or the outer wall of the ground wire core is not less than 3.0mm and not more than 5.0mm.
This cable makes the cable still have equipment ground connection function through adding the earth core. Due to the addition of the ground wire core, the flexibility of the cable is negatively affected. In this regard, the present cable employs a specific flexible conductor structure that is primarily optimized for flexibility. Meanwhile, gaps are formed among the power wire cores with the largest outer diameter and the largest number, and the gaps are filled with softer rubber sheath materials. If the power wire cores are bonded with each other, under the stranded structure, the friction force between the power wire cores hinders relative displacement caused by bending. The tensile property of the cable can be improved by introducing the ground wire core.
Further: the soft copper round wire is a bare copper soft round wire or a tin-plated copper soft round wire.
Further: the power wire core is 10mm in sectional area 2 The copper conductor, there is the isolating layer between copper conductor and insulating layer; the isolation layer is formed by wrapping reinforced non-woven fabrics outside the conductor, and the width of a covering of the wrapping is not less than 5mm.
Preferably, the pitch diameter ratio of the cable core twisting is not more than 10 times.
This structure cable:
from a functional perspective: the isolation layer can be large (10 mm) 2 Above) the stranded conductor is more tightly combined, reducing deformation; the insulating layer has the soft characteristic of ethylene propylene rubber insulating material; the outer sheath layer is an outer sheath formed by extruding and vulcanizing high-wear-resistant rubber.
The twisted pitch-diameter ratio of the cable core is not more than 10 times, so that the cable has better flexibility.
The outer sheath is directly extruded outside the cable core, and the cable core is adhered to the outer sheath, so that the service life of the cable can be effectively prolonged.
In terms of mechanical properties: the conductor material and the structural characteristics of the cable improve the flexibility of the cable.
From the viewpoint of production applicability: the cable structure has good producibility, and the production line can finish high-quality production of cable products without special modification.
The beneficial effects of the technical scheme are as follows:
in order to meet the special application environment of the tower crane cable in various frequent bending and moving uses, the cable is required to meet the requirements of excellent electrical performance, bending resistance and the like. In order to meet these requirements, the conductor structure, the insulation structure, the sheath structure, and the like of the cable need to be specifically designed.
The cable adopts a category 5 soft copper conductor, the monofilament breaking elongation range of the soft copper round wire can reach 20-30%, the conductor is ensured to have good flexibility and certain extensibility, and the conductor is easy to bend in the bending moving process, has small bending stress, does not deform or loosen after being laid and the like;
the ethylene propylene rubber is used as an insulating material, and a mature rubber extruding continuous vulcanization process can be adopted to prepare the insulating layer. Because the ethylene propylene rubber has excellent electrical property, oil resistance, high and low temperature resistance, the insulating material strengthened by mechanical property has better tensile strength and elongation at break, and meets the special use requirement of repeated bending when used as insulation.
The wire core groups are twisted together to form a cable, the diameter ratio of the formed cable joints is not more than 12, and the pitches are uniform;
the cable core is better adhered to the sheath, so that the service life of the cable is prolonged;
the high-strength rubber sheath material is used as a sheath material, can be produced by a high-pressure steam vulcanization continuous production process, and enables the cable sheath to have excellent tightness under the condition of meeting the requirement of high tensile strength.
The tower crane rubber sleeve cable not only provides power output, but also has the characteristics of cold resistance, wear resistance, oil resistance, softness, good bending performance and the like. And can be widely applied to equipment such as large-scale tower cranes, traveling cranes, outdoor elevators for buildings and the like.
Drawings
Fig. 1 is a schematic view of a radial cross-sectional structure of the cable of this example.
In the figure: 1. the cable comprises a copper conductor, 2 parts of an isolation layer, 3 parts of an insulation layer, 4 parts of an outer sheath, 5 parts of a power wire core, 6 parts of a neutral wire core, 7 parts of a ground wire core.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, a rubber jacketed flexible cable for a tower crane has the structure: a cable core is formed by twisting a plurality of wire cores, and an outer sheath 4 is coated outside the cable core; the outer sheath is made of rubber sheath material; the wire core comprises a power wire core 5 and a neutral wire core 6; the power wire core and the neutral wire core are both formed by wrapping an insulating layer 3 outside a copper conductor 1. The wire core further comprises a ground wire core 7, and the ground wire core is formed by wrapping an insulating layer outside a copper conductor. In this example, the power core has three, neutral core and ground core have one respectively. The three power wire cores are uniformly distributed about the axis of the cable; the both sides of neutral sinle silk and earth core are laminated with a power sinle silk respectively, make the mechanical properties of cable comparatively even.
The pitch-diameter ratio of the cable core twisting is not more than 12 times;
in the power wire core 5, the thickness of the insulating layer is 1.2-1.6 mm, and the sectional area of the copper conductor is 10-70 mm 2 ；
In the neutral wire core 6, the thickness of the insulating layer is 1.0-1.6 mm, and the sectional area of the copper conductor is 6-50 mm 2 ；
In the ground wire core 7, the thickness of the insulating layer is 1.0-1.6 mm, and the sectional area of the copper conductor is 6-50 mm 2 ；
The insulating layers of the power wire core, the ground wire core and the neutral wire core are all made of ethylene propylene rubber insulating materials;
gaps are reserved among the power wire cores; the ground wire core and the neutral wire core are distributed on the opposite sides of the power wire core, and the ground wire core and the neutral wire core are respectively attached to the adjacent power wire cores; the gaps among the power wire cores are filled with rubber sheathing materials, and the gaps between the ground wire cores and the neutral wire cores adjacent to the power wire cores are filled with the rubber sheathing materials;
for the copper conductors in the power wire core, the power wire core and the ground wire core, the copper conductor is a conductor formed by the 5 th soft copper, the copper conductor is formed by bundling and twisting soft round copper wires, the bundling pitch diameter ratio of the soft round copper wires is 25-30 times, and the twisting pitch diameter ratio is 10-20 times; the wire diameter of the soft round copper wire is 0.4-0.5 mm;
the distance from the outer wall of the outer sheath to the outer wall of the power wire core, the outer wall of the power wire core or the outer wall of the ground wire core is not less than 3.0mm and not more than 5.0mm.
The soft copper round wire is a bare copper soft round wire or a tin-plated copper soft round wire.
The power wire core 5 is 10mm in sectional area 2 The above copper conductor, there is isolating layer 2 between copper conductor and insulating layer; the isolation layer is formed by wrapping reinforced non-woven fabrics outside the conductor, and the width of a covering of the wrapping is not less than 5mm.
More preferably, the pitch diameter ratio of the cable core twist is not more than 10 times (the pitch diameter ratio of the cable core twist in this example is 9 times).
The cable specification of this example is 450/750V 3 + 16+2 + 6, the outer diameter of this type of cable is 23.3-29.5 mm, and the rated voltage of this type of cable is 450/750V. The cross section area of the conductor of the three power wire cores in the cable is 16mm 2 The conductor cross-sectional areas of the ground core and the neutral core are respectively 6mm 2 。
In this example, the insulating layer 3 is an insulating layer formed by ethylene propylene rubber insulating material through rubber extrusion continuous vulcanization crosslinking process; the outer sheath 4 is a sheath layer formed by extruding high-wear-resistant rubber sheath materials, vulcanizing and crosslinking.
In the copper conductor, the bunching strand pitch diameter ratio: 25-30 times; the soft round copper wires are divided into a plurality of layers from inside to outside during stranding, and the soft round copper wires in each layer are increased layer by layer; the stranding pitch diameter ratio of the soft round copper wire of the inner layer is as follows: 15-20 times, and the ratio of the stranding pitch to the diameter of the soft round copper wire at the outer layer is as follows: 10 to 12 times. In this example, the nominal filament diameter of the soft round copper wire is 0.4mm.
In the isolation layer, adopt around package strenghthened type non-woven fabrics structure, the thickness range of strenghthened type non-woven fabrics can be 0.10 +/-0.02 mm ~ 0.2 +/-0.02 mm. The thickness of the reinforced non-woven fabric of this example is 0.1mm, and the lap width of the lap is 5 to 10mm.
The thickness of the insulating layer is 1.0mm to 1.6mm. The thickness of the insulating layer of the neutral wire core and the ground wire core is smaller than that of the insulating layer of the power wire core.
The type/mark of the ethylene propylene rubber insulating material is IE4, and the thickness of the insulating layer of the power wire core is 1.2mm. The model/brand of sheath material is SE3 or SE4, and the distance of the outer wall of oversheath apart from power sinle silk, power sinle silk or earth core outer wall is 3.6mm.
In this example
The conductor is the conductor that constitutes by 5 kinds of soft copper, and the conductor comprises soft round copper wire bundle hank, compares normal transposition structure, and the bundle structure has not only increased the compliance of cable, still improves the reliability of circuit intercommunication. The bundle is a stranded wire formed by stranding a plurality of single wires together according to the same stranded wire without a stranding rule, and the positions of the single wires are not fixed, so that the shape of the bundle is difficult to keep round. In order to maintain the roundness of the cable conductor, the cross-sectional area is 10mm 2 The conductor is specially designed with reinforced non-woven fabric wrapped conductor.
The type/brand of the ethylene-propylene insulating material of the insulating layer is IE4.
The type/brand of the sheath material of the outer sheath layer is SE3 or SE4.
The cables of this example were tested as required in table 1 and were all qualified.
The detection shows that: under the same conditions, the cable has better wear resistance, oil resistance, softness and good bending performance, and meets the use requirements of various tower cranes.
TABLE 1
TABLE 2
TABLE 3
| Serial number | Name of | Test requirements | |
| 1 | Conductor DC resistance test | Meets the regulation of 5-class copper conductor in GB/ |
|
| 2 | Finished cable voltage test | 450/750V:2500V power frequency withstand voltage, without insulation breakdown |
Claims (9)
1. A tower machine rubber jacketed flexible cable, the structure is: a cable core is formed by twisting a plurality of wire cores, and an outer sheath is coated outside the cable core; the outer sheath is made of rubber sheath material; the wire core comprises a power wire core and a neutral wire core; the power wire core and the neutral wire core are formed by wrapping insulating layers outside copper conductors, and the power wire core and the neutral wire core are characterized by also comprising a ground wire core, wherein the ground wire core is formed by wrapping the insulating layers outside the copper conductors;
the pitch diameter ratio of the twisting of the cable core is not more than 12 times;
power plantIn the wire core, the thickness of the insulating layer is 1.2-1.6 mm, and the sectional area of the copper conductor is 10-70 mm 2 ；
In the neutral wire core, the thickness of the insulating layer is 1.0-1.6 mm, and the sectional area of the copper conductor is 6-50 mm 2 ；
In the ground wire core, the thickness of the insulating layer is 1.0-1.6 mm, and the sectional area of the copper conductor is 6-50 mm 2 ；
The insulating layers of the power wire core, the ground wire core and the neutral wire core are all made of ethylene propylene rubber insulating materials;
gaps are reserved among the power wire cores; the ground wire core and the neutral wire core are distributed on the opposite sides of the power wire core, and the ground wire core and the neutral wire core are respectively attached to the adjacent power wire cores; the gaps among the power wire cores are filled with rubber sheathing materials, and the gaps between the ground wire cores and the neutral wire cores adjacent to the power wire cores are filled with the rubber sheathing materials;
for the copper conductors in the power wire core, the power wire core and the ground wire core, the copper conductor is a conductor formed by the No. 5 soft copper, the copper conductor is formed by bundling and stranding soft round copper wires, the bundling pitch diameter ratio of the soft round copper wires is 25-30 times, and the stranding pitch diameter ratio is 10-20 times; the wire diameter of the soft round copper wire is 0.4-0.5 mm;
the distance from the outer wall of the outer sheath to the outer wall of the power wire core, the outer wall of the power wire core or the outer wall of the ground wire core is not less than 1.5mm and not more than 5.5mm.
2. The rubber jacketed flexible cable for tower crane according to claim 1, wherein the flexible copper round wire is a bare copper round wire or a tinned copper round wire.
3. The rubber jacketed flexible cable for tower crane of claim 1, wherein the power wire core has a cross-sectional area of 10mm 2 The copper conductor, there is the isolating layer between copper conductor and insulating layer; the isolation layer is formed by wrapping reinforced non-woven fabrics outside the conductor, and the width of a covering cover of the wrapping is not less than 5mm.
4. The rubber jacketed flexible cable for the tower crane according to claim 3, wherein the thickness range of the reinforced non-woven fabric lapping is 0.10 +/-0.02 mm-0.2 +/-0.02 mm.
5. The rubber jacketed flexible cable for the tower crane according to claim 1, wherein the distance from the outer wall of the outer sheath to the outer wall of the power wire core, the power wire core or the ground wire core is not less than 3.0mm and not more than 5.0mm.
6. The rubber jacketed flexible cable for the tower crane according to claim 1, wherein the pitch diameter ratio of the stranding of the cable core is not more than 10 times.
7. The rubber jacketed flexible cable for the tower crane according to claim 1, wherein the outer diameter of the cable is 21.0 mm-50.0 mm.
8. The rubber jacketed flexible cable for the tower crane according to claim 3, wherein the power wire cores are three, and the neutral wire cores and the ground wire cores are respectively provided with one; the three power wire cores are uniformly distributed about the axis of the cable; the two sides of the neutral wire core and the ground wire core are respectively attached to one power wire core.
9. The rubber jacketed flexible cable for the tower crane according to claim 8, characterized in that the outer diameter of the cable is 23.3-29.5 mm;
the pitch diameter ratio of the bundled stranded wires is 25-30 times, the soft round copper wires are divided into a plurality of layers from inside to outside during stranding, and the soft round copper wires in each layer are increased layer by layer; the stranding pitch diameter ratio of the soft round copper wire of the inner layer is as follows: 15-20 times, and the ratio of the stranding pitch to the diameter of the soft round copper wire at the outer layer is as follows: 10 to 12 times;
the nominal diameter of the monofilament of the soft round copper wire is 0.4mm;
the thickness of the reinforced non-woven fabric is 0.1mm, and the width of a lap cover of the lapping package is 5-10 mm;
in the power wire core, the thickness of the insulating layer is 1.2mm;
the distance between the outer wall of the outer sheath and the outer wall of the power wire core, the power wire core or the ground wire core is 3.6mm;
when the soft round copper wires are twisted, the soft round copper wires are divided into a plurality of layers from inside to outside, and the soft round copper wires in each layer are increased layer by layer; the stranding pitch diameter ratio of the soft round copper wire of the inner layer is as follows: 15-20 times, and the ratio of the twisted pitch diameter of the soft round copper wire on the outer layer is as follows: 10 to 12 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221277276.0U CN217767868U (en) | 2022-05-26 | 2022-05-26 | Rubber jacketed flexible cable for tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221277276.0U CN217767868U (en) | 2022-05-26 | 2022-05-26 | Rubber jacketed flexible cable for tower crane |
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| Publication Number | Publication Date |
|---|---|
| CN217767868U true CN217767868U (en) | 2022-11-08 |
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| CN202221277276.0U Active CN217767868U (en) | 2022-05-26 | 2022-05-26 | Rubber jacketed flexible cable for tower crane |
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| CN (1) | CN217767868U (en) |
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- 2022-05-26 CN CN202221277276.0U patent/CN217767868U/en active Active
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