CN215730920U - Cable with improved insulation - Google Patents
Cable with improved insulation Download PDFInfo
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- CN215730920U CN215730920U CN202122133924.7U CN202122133924U CN215730920U CN 215730920 U CN215730920 U CN 215730920U CN 202122133924 U CN202122133924 U CN 202122133924U CN 215730920 U CN215730920 U CN 215730920U
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Abstract
The utility model belongs to the technical field of cables and discloses a cable. The cable comprises a first sheath, an inner core and a second sheath, wherein the inner core comprises at least two core wires and a support framework, an insulating layer is wrapped outside each core wire, the support framework uniformly divides an inner cavity of the first sheath into a plurality of areas, the core wires are uniformly distributed in each area, and the support framework and the insulating layer are both made of high-density polyethylene; the first sheath is sleeved on the outer side of the inner core and is made of polyester rubber; the second sheath is sleeved on the outer side of the first sheath, and the second sheath is made of thermoplastic polyurethane elastomer rubber. The cable provided by the utility model is light in weight, and when the cable is suitable for free-drooping type suspension installation, the root of the cable is not easy to excessively bend, so that skin wrinkling is reduced; when the cable is connected with the motor, the sheath of the cable cannot be abraded due to the contact with the motor when the motor vibrates; when the cable is pulled downwards, the root of the cable is not easy to deform.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a cable.
Background
The power cable is a cable with a large wire diameter, thick phase insulation and metal armor protection on the outer side, and is generally a three-core or four-core cable. Power cables are commonly used in power supply systems as the backbone of three-phase industrial or single-phase domestic power supplies.
During the use process of the power cable for the servo motor, the power cable is often required to be mounted in a free-drooping type suspension mode. Due to the effect of the dead weight of the cable, the root of the cable connected to the motor may sag excessively, thereby causing the following problems: on one hand, at the root part where the cable is connected with the motor, the bending radius of the cable is too small, and the outer skin of the bent inner side of the cable is easy to wrinkle; secondly, when the motor vibrates, the cable is tightly contacted with the shell of the motor, so that the outer skin of the cable is abraded or broken, and the safety of operators is damaged; moreover, when the cable is pulled downward, the root of the connection between the cable and the motor is easily flattened, and the internal structure is damaged.
In the prior art, a tail clamp which plays a supporting role and prevents the cable from sagging is often sleeved at the sagging root part of the cable. The tail presss from both sides needs extra manufacturing procedure to make, has reduced the machining efficiency of pencil, has improved the processing cost to, the length of cable that hangs down is longer, when the cable dead weight is heavier, the tail presss from both sides and can't play fine supporting role almost, can't avoid the cable to become flat and cable inner structure to change.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a cable, which is used for solving the problems that the cable is easy to deform and the cable sheath is easy to wear due to dead weight in the using process.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an electrical cable, comprising:
the first sheath is made of polyester rubber;
the first sheath is sleeved on the outer side of the inner core, the inner core comprises at least two core wires and a support framework, an insulating layer is wrapped outside each core wire, the support framework uniformly divides the inner cavity of the first sheath into a plurality of areas, the core wires are uniformly distributed in each area, and the support framework and the insulating layer are both made of high-density polyethylene;
the second sheath is sleeved on the outer side of the first sheath and is made of thermoplastic polyurethane elastomer rubber.
Optionally, the support frame includes a plurality of separation ribs arranged around a central axis of the first sheath at intervals, each separation rib extends along a radial direction of the first sheath, and a region is formed between adjacent separation ribs.
Optionally, the support frame further comprises a central shaft portion, the separating rib portions are arranged along the circumferential direction of the central shaft portion at uniform intervals, each separating rib portion is far away from one end of the first sheath and connected with the central shaft portion, and the central shaft portion is a hollow shaft.
Optionally, a reinforcement is provided within the cavity of the central shaft portion.
Optionally, a gap is left between the end of the spacer rib and the first sheath.
Optionally, a core wire is arranged in each region, and the outer wall of the insulating layer, the first sheath and two adjacent separating ribs are arranged in a tangent manner; or
Each area is internally provided with a plurality of core wires, and in the same area, two adjacent insulating layers are arranged in a tangent mode, and the insulating layers positioned on the outer sides are tangent to the separating rib parts or the first sheaths.
Optionally, a plurality of hollow cavities are arranged in the second sheath at intervals along the circumferential direction.
Optionally, a woven layer is disposed between the first sheath and the second sheath.
Optionally, the braided layer is made of a tinned copper wire.
Optionally, the insulating layer, the first jacket and/or the second jacket are formed by extrusion.
The utility model has the beneficial effects that: according to the cable provided by the utility model, the insulating layer made of high-density polyethylene is arranged outside the core wire, the density of the high-density polyethylene is low, the wall thickness of the insulating layer can be effectively reduced, the volume of the core wire is reduced, and the weight of the insulating layer is reduced; the first sheath is arranged on the outer side of the inner core and made of polyester rubber, the polyester rubber has high strength, high hardness and high resilience, and can resist strong deformation, so that the section of the inner core is kept circular, the density of the polyester rubber is low, and the weight of the first sheath is reduced; the inner core is provided with the support framework, the support framework uniformly divides the inner cavity of the first sheath into a plurality of areas, the core wires are uniformly distributed in each area, and the support framework is made of high-density polyethylene which is high in hardness and not easy to deform, so that the cable can be effectively prevented from deforming or dislocating in the use process; the second sheath is sleeved on the outer side of the first sheath, the second sheath is made of thermoplastic polyurethane elastomer rubber, and the thermoplastic polyurethane elastomer rubber has high wear resistance and low density, so that the wear resistance of the second sheath is improved, and the weight of the second sheath is also reduced. The cable provided by the utility model is light in weight, and when the cable is suitable for free-drooping type suspension installation, the root of the cable is not easy to excessively bend, so that skin wrinkling is reduced; when the cable is connected with the motor, the sheath of the cable cannot be abraded due to the contact with the motor when the motor vibrates; when the cable is pulled downwards, the root of the cable is not easy to deform.
Drawings
Fig. 1 is a schematic structural diagram of a cable according to a first embodiment of the present invention (four spacer ribs);
fig. 2 is a schematic structural diagram of a cable according to the first embodiment of the present invention (six separating ribs).
In the figure:
1. a first sheath; 2. an inner core; 21. a core wire; 22. a support framework; 23. an insulating layer; 3. a second sheath; 4. and (4) weaving the layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
The embodiment provides a cable, as shown in fig. 1 and 2, the cable includes a first sheath 1, an inner core 2 and a second sheath 3, the inner core 2 includes at least two core wires 21 and a supporting framework 22, an insulating layer 23 wraps the outside of each core wire 21, the supporting framework 22 uniformly divides the inner cavity of the first sheath 1 into a plurality of regions, the core wires 21 are uniformly distributed in each region, and the supporting framework 22 and the insulating layer 23 are both made of high-density polyethylene; the first sheath 1 is sleeved outside the inner core 2, and the first sheath 1 is made of polyester rubber; the second sheath 3 is sleeved outside the first sheath 1, and the second sheath 3 is made of thermoplastic polyurethane elastomer rubber.
In the cable provided by the utility model, the insulating layer 23 made of high-density polyethylene is arranged outside the core wire 21, in the prior art, the insulating material mostly adopts polyvinyl chloride, and the density of the polyvinyl chloride is 1.45g/cm3And the density of the high density polyethylene is 0.92g/cm3The high-density polyethylene has low density, so that the wall thickness of the insulating layer 23 can be effectively reduced, the volume of the core wire 21 is reduced, and the weight of the insulating layer 23 is reduced; through setting up support frame 22 at inner core 2, support frame 22 evenly separates the inner chamber of first sheath 1 for a plurality of regions, and heart yearn 21 distributes in each region evenly, and support frame 22's material is high density polyethylene, and high density polyethylene hardness is high, and non-deformable, can prevent effectively that the cable from warping or misplacing in the use.
Secondly, a first sheath 1 is arranged on the outer side of the inner core 2, the material of the first sheath 1 is polyester rubber, and the density of the polyester rubber is 1.2g/cm3The density of the first sheath 1 is lower than that of common polyvinyl chloride in the prior art, so that the weight of the first sheath 1 is reduced, and meanwhile, the polyester rubber has high strength, high hardness and high resilience, can resist stronger deformation and enables the section of the inner core 2 to keep a round shape; the second sheath 3 is sleeved outside the first sheath 1, the second sheath 3 is made of thermoplastic polyurethane elastomer rubber, and the thermoplastic polyurethane elastomer rubber has high wear resistance and low density, so that the wear resistance of the second sheath 3 is improved, and the weight of the second sheath 3 is reduced.
The cable provided by the utility model is light in weight, and when the cable is suitable for free-drooping type suspension installation, the root of the cable is not easy to excessively bend, so that skin wrinkling is reduced; when the cable is connected with the motor, the sheath of the cable cannot be abraded due to the contact with the motor when the motor vibrates; when the cable is pulled downwards, the root of the cable is not easy to deform.
Optionally, the supporting framework 22 includes a plurality of separating ribs arranged at intervals around the central axis of the first sheath 1, and each separating rib extends along the radial direction of the first sheath 1, and an area is formed between adjacent separating ribs. The separating rib part extends along the radial direction of the first sheath 1 to separate the inner cavity of the first sheath 1 into a plurality of areas, so that the core wires 21 are distributed in each area, and the dislocation of the core wires 21 is avoided.
As shown in fig. 1, preferably, the ends of all the partition ribs away from the first sheath 1 meet at the central axis of the first sheath 1, so as to simplify the processing of the support frame 22. Optionally, the support framework 22 comprises four separation ribs, the four separation ribs forming a cross. In the process of twisting the core wire 21, the four separating rib parts can evenly fasten the core wire 21 in four sectors, so that the core wire 21 is prevented from deforming and dislocating, and the cross-shaped structure is simple and easy to process.
In another embodiment, as shown in FIG. 2, the support armature 22 may include six spacer ribs. When the diameter of the core wire 21 is small, or the number of the core wires 21 in each region is small, the number of the sectors may be set to 6 to make the twisting of the core wires 21 tighter, more effectively preventing the deformation and misalignment of the core wires 21. In other embodiments, one skilled in the art can set the number of the separating ribs according to the specific situation. And it is understood that the number of the partition ribs may be adaptively set according to the size and the number of the core wires 21, which is not limited by the present invention.
In the cable preparation process, when each area is provided with one core wire 21, the outer wall of the insulating layer 23 and the first sheath 1 are tangent to two adjacent separating ribs. The outer wall of the insulating layer 23, the supporting framework 22 and the supporting framework 22 are arranged in a tangent mode, so that the insulating layer 23 is tightly attached to the first sheath 1 and the supporting framework 22, the core wire 21 is gathered towards the center of the supporting framework 22, and the core wire 21 is prevented from deforming. When a plurality of core wires 21 are arranged in each region of the inner cavity of the first sheath 1, two adjacent insulating layers 23 are arranged in a tangent mode in the same region, and the insulating layer 23 of the core wire 21 at the outermost side is tangent to the first sheath 1 or the supporting framework 22. The arrangement is such that the plurality of core wires 21 in each region are sufficiently gathered toward the center of the supporting frame 22, so that the core wires 21 are twisted more tightly and prevented from being deformed.
Further, a gap is left between the end of the separating rib and the first sheath 1 to prevent the first sheath 1 from protruding due to the excessively long separating rib when the first sheath 1 is sleeved on the insulating layer 23.
Optionally, an insulating sealing paste is filled between the first sheath 1 and the core wire 21 and the supporting skeleton 22. The insulating sealing paste can prevent moisture or dust from entering the cable, so that the safety of the cable is ensured, and the reliability of the cable is improved.
In order to further reduce the overall weight of the cable, optionally, a plurality of hollow cavities are arranged in the second sheath 3 at intervals along the circumferential direction. The hollow cavity can not only reduce the weight of the cable, but also reduce the interference of the external temperature to the inside of the cable, and the hollow cavity can be uniformly arranged along the circumferential direction of the second sheath 3.
Further, the insulating layer 23, the first sheath 1 and/or the second sheath 3 are formed by extrusion. The extrusion molding process is simple and the cost is low. Optionally, a braided layer 4 is provided between the first sheath 1 and the second sheath 3. By providing the braid 4 between the first sheath 1 and the second sheath 3, the braid 4 can effectively shield the external electromagnetic signal. Specifically, the material of weaving layer 4 is the tinned copper wire. The tinned copper wire can effectively protect the core wire 21 from external electromagnetic interference and eliminate induced electricity on the surface of the cable.
Alternatively, the material of the core wire 21 is copper. The copper has high strength and good ductility, and the copper core resists fatigue, is not easy to break after being repeatedly bent, and is convenient to wire.
The production process of the cable of the embodiment comprises the following steps: manufacturing a core wire 21 and a supporting framework 22; extruding an insulating layer 23 outside the core wire 21; the core wires 21 coated with the insulating layer 23 on the outer side are respectively and uniformly arranged in the areas formed by the supporting frameworks 22; stranding the core wire 21 and the supporting framework 22 into the inner core 2; extruding a first sheath 1 outside the inner core 2; a braided layer 4 is arranged on the outer side of the first sheath 1; a second sheath 3 is extruded outside the woven layer 4.
Example two
The present embodiment provides a cable, and the basic structure of the cable provided by the present embodiment is the same as that of the first embodiment, and only a part of the structure is different. The present embodiment will be described only with respect to a structure different from the first embodiment.
In this embodiment, the supporting framework 22 further includes a central shaft portion, the separating ribs are disposed along the circumferential direction of the central shaft portion at uniform intervals, one end of each separating rib, which is far away from the first sheath 1, is connected to the central shaft portion, and the central shaft portion is a hollow shaft, i.e., a cavity is disposed in the central shaft portion along the direction of the central axis.
Preferably, a reinforcing member is provided in the cavity of the central shaft portion, and the deformation resistance of the supporting frame 22 can be effectively improved by providing the reinforcing member in the supporting frame 22. Illustratively, the reinforcement may be aramid cords, nylon cords, or fiberglass reinforced plastic. In other embodiments, the material of the reinforcing member can be set by those skilled in the art according to specific situations.
In other embodiments, the core wire 21 may be inserted into the cavity of the central shaft portion to improve the space utilization rate inside the first sheath 1.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A cable, comprising:
the protective sleeve comprises a first protective sleeve (1), wherein the first protective sleeve (1) is made of polyester rubber;
the inner core (2) is sleeved on the outer side of the inner core (2), the inner core (2) comprises at least two core wires (21) and a supporting framework (22), an insulating layer (23) wraps the core wires (21), the supporting framework (22) uniformly divides the inner cavity of the first sheath (1) into a plurality of areas, the core wires (21) are uniformly distributed in the areas, and the supporting framework (22) and the insulating layer (23) are both made of high-density polyethylene;
the second sheath (3) is sleeved on the outer side of the first sheath (1), and the second sheath (3) is made of thermoplastic polyurethane elastomer rubber.
2. A cable according to claim 1, wherein the supporting skeleton (22) comprises a plurality of separating ribs arranged at intervals around the central axis of the first sheath (1), and each of the separating ribs extends in a radial direction of the first sheath (1), and a region is formed between adjacent separating ribs.
3. The cable according to claim 2, wherein the supporting framework (22) further comprises a central shaft portion, the separating ribs are uniformly spaced along the circumference of the central shaft portion, one end of each separating rib, which is far away from the first sheath (1), is connected with the central shaft portion, and the central shaft portion is a hollow shaft.
4. A cable according to claim 3 wherein a strength member is provided within the cavity of the central shaft portion.
5. A cable according to claim 2, characterized in that a gap is left between the end of the separating rib and the first sheath (1).
6. A cable according to any one of claims 2 to 5, wherein a said core (21) is provided in each said region, the outer wall of said insulating layer (23) being tangential to said first sheath (1) and to two adjacent said separating ribs; or
Each area is internally provided with a plurality of core wires (21), every two adjacent insulating layers (23) are arranged in a tangent mode in the same area, and the insulating layers (23) positioned on the outer sides are tangent to the separating ribs or the first sheaths (1).
7. A cable according to any of claims 1 to 5, wherein a plurality of hollow cavities are provided at circumferentially spaced intervals within the second sheath (3).
8. A cable according to any one of claims 1 to 5, characterized in that a braid (4) is provided between the first (1) and second (3) sheaths.
9. A cable according to claim 8, characterized in that the material of the braid (4) is tin-plated copper wire.
10. A cable according to any of claims 1 to 5, characterized in that the insulating layer (23), the first sheath (1) and/or the second sheath (3) are shaped by extrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122133924.7U CN215730920U (en) | 2021-09-06 | 2021-09-06 | Cable with improved insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122133924.7U CN215730920U (en) | 2021-09-06 | 2021-09-06 | Cable with improved insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215730920U true CN215730920U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122133924.7U Active CN215730920U (en) | 2021-09-06 | 2021-09-06 | Cable with improved insulation |
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| Country | Link |
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| CN (1) | CN215730920U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116825422A (en) * | 2023-03-18 | 2023-09-29 | 三元科技（深圳）有限公司 | Miniature transmission cable for intravascular operation |
-
2021
- 2021-09-06 CN CN202122133924.7U patent/CN215730920U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116825422A (en) * | 2023-03-18 | 2023-09-29 | 三元科技（深圳）有限公司 | Miniature transmission cable for intravascular operation |
| CN116825422B (en) * | 2023-03-18 | 2024-05-24 | 三元科技（深圳）有限公司 | Miniature transmission cable for intravascular operation |
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