Protection structure and snow accumulation prevention compact cable
By incorporating a protective structure consisting of tensile components, a buffer layer, an insulation layer, and resistance wires on the cable, combined with the compact design of the Litz aluminum conductor, the mechanical damage and high-frequency current loss caused by snow and ice accumulation in cold environments in traditional stranded wires are solved, thereby improving the reliability and energy efficiency of the cable.
Patent Information
- Application Number
- CN202423129328.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Traditional steel-cored aluminum stranded wire is prone to snow and ice accumulation in cold and snowy winter environments, which can lead to increased conductor sag, increased mechanical stress, and potential breakage. In addition, the concentrated current under high-frequency current can lead to increased energy loss.
It employs a protective structure consisting of tensile components, a separator, an insulation layer, a resistance wire, and a sheath. The resistance wire generates heat when energized to melt snow and ice. Combined with the compact design of the Litz aluminum conductor, it ensures uniform current distribution to reduce losses.
It effectively reduces the risk of mechanical damage to cables caused by snow and ice, improves the reliability of power supply, and reduces energy loss under high-frequency current.
Smart Images
Figure CN223612118U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to cable protection technical field, especially a protection structure and prevent compact cable of snow accumulation. BACKGROUND
[0002] In cold regions or environments with heavy snow in winter, traditional steel-cored aluminum stranded wire is prone to accumulate a large amount of snow. The accumulated snow not only increases the weight of the wire but also may cause the wire sag to increase, even exceeding the designed safety range. This increases the risk of collision between the wire and the ground or other objects, affecting the safety of power transmission. During the melting and refreezing process of the snow, ice may be formed. The weight and irregular shape of the ice may cause greater mechanical stress on the wire, further exacerbating the risk of damage to the wire. Although the steel core in the steel-cored aluminum stranded wire provides a certain tensile strength, in some special situations, such as crossing a long distance or bearing a large tension, the traditional steel-cored aluminum stranded wire may not meet the higher tensile requirements. This may cause the wire to break under extreme conditions, affecting the reliability of power supply. Under high-frequency current, the current of the traditional stranded wire will concentrate on the surface of the conductor, causing the current density in the center to decrease, the resistance to increase, and the energy loss to increase. SUMMARY
[0003] This section aims to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification, and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the present utility model.
[0004] In view of the above or existing problems in the prior art, the present utility model is proposed.
[0005] Therefore, the purpose of the present utility model is to provide a protection structure, which aims to solve the problems caused by the weight of snow and ice in the process of laying and using traditional stranded wire in cold and snowy environments.
[0006] To solve the above technical problems, the present utility model provides the following technical solutions: a protection structure, comprising a tensile member, an isolation layer arranged on the outer wall of the tensile member, an insulation layer arranged on the outer wall of the isolation layer, a resistance wire arranged on the outer wall of the insulation layer, and a first sheath arranged on the outer wall of the resistance wire.
[0007] As a preferred scheme of the protection structure of the present utility model, there is a first space between the isolation layer and the insulation layer.
[0008] As a preferred scheme of the protection structure of the present utility model, a water-blocking layer is arranged between the insulation layer and the resistance wire.
[0009] As a preferred scheme of the protective structure, the water-blocking layer and the resistance wire are provided with a heat insulation layer.
[0010] As a preferred scheme of the protective structure, the tensile member is made of a plurality of steel wires.
[0011] As a preferred scheme of the protective structure, the inner wall of the insulating layer is provided with a semi-conductive belt.
[0012] As a preferred scheme of the protective structure, the resistance wire is spirally arranged on the outer wall of the heat insulation layer.
[0013] As a preferred scheme of the protective structure, the resistance wire is directly connected with an external power supply.
[0014] The protective structure has the beneficial effect that the heat generated by the resistance wire can melt the accumulated snow and ice on the surface of the cable, thereby reducing the weight of the cable and greatly reducing the risk of cable breakage caused by accumulated snow or ice.
[0015] Another object of the present application is to provide a compact cable for preventing snow accumulation, which aims to solve the problem that in the traditional stranded wire, the current will concentrate on the surface of the conductor under high-frequency current, resulting in a decrease in current density in the center part, an increase in resistance, and an increase in energy loss.
[0016] To solve the above technical problems, the present application further provides the following technical scheme: a compact cable for preventing snow accumulation, comprising a protective structure, and a first conductor arranged in the first space.
[0017] As a preferred scheme of the compact cable for preventing snow accumulation, the first conductor is made of a plurality of conductors, the cross section of each single conductor in the first conductor is trapezoidal, and the first conductor is a Litz aluminum conductor.
[0018] The compact cable for preventing snow accumulation has the beneficial effect of increasing the effective conduction area of the current, thereby reducing the loss caused by the skin effect. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings. Among them:
[0020] Fig. 1The utility model discloses a protection structure and the cross section schematic drawing of compact cable of preventing snow accumulation in the utility model.
[0021] Fig. 2 The utility model discloses a protection structure and the three -dimensional schematic drawing of compact cable of preventing snow accumulation in the utility model. DETAILED DESCRIPTION
[0022] In order to make the above -mentioned purpose, feature and advantage of the utility model more apparent and easy to understand, the specific implementation of the utility model is explained in detail below with the drawings of the specification.
[0023] In the following description, a plurality of specific details are set forth in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from the description, and those skilled in the art can make similar generalization without departing from the connotation of the utility model, therefore the utility model is not limited by the following disclosed specific embodiments.
[0024] Secondly, the "one embodiment" or "embodiment" referred to here means that the specific features, structures or characteristics can be included in at least one implementation of the utility model. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, and is not an embodiment that is independent or selectively excluded from other embodiments.
[0025] Embodiment 1
[0026] Reference Figs. 1-2 For the first embodiment of the utility model, the embodiment provides a protection structure 100, including the tensile member 101, the isolation layer 102 of setting in the outer wall of the tensile member 101, the insulating layer 103 of setting in the outer wall of the isolation layer 102, the resistance wire 104 of setting in the outer wall of the insulating layer 103, the first sheath 105 of setting in the outer wall of the resistance wire 104.
[0027] Among them, the tensile member 101 bears the axial tension of cable, protects the conductor in the cable, and the tensile member 101 is made of galvanized twisted steel wire surface, and the lubricating grease is added when the steel wire is twisted, which reduces the friction between the steel wires and protects the steel wire from rusting, prolongs the service life of the tensile member 101, the material of the isolation layer 102 is PVC, the isolation layer 102 prevents the tensile member 101 and the conductor in the cable from contacting each other and causing electrochemical corrosion, the material of the insulating layer 103 is cross-linked polyethylene insulating material, the resistance wire 104 is the resistance wire 104 that will heat after electrification, when the resistance wire 104 needs to heat, directly let the resistance wire 104 external power supply heat, the first sheath 105 adopts weather-resistant cross-linked polyethylene overhead insulation material, which can be suitable for various severe weather protection of internal elements of cable.
[0028] In use, the tensile member 101 bears the axial tension of the cable to protect the cable conductor, the isolation layer 102 prevents the tensile member 101 from contacting the cable conductor to cause electrochemical corrosion, and the insulating layer 103 protects the conductor from being affected by the current transmission; when the cable is covered with ice and snow or wrapped with rime, the outer wall of the first sheath 105 is actually covered with ice and snow or wrapped with rime, the resistance wire 104 is connected to a power supply to generate heat, and the heat generated by the resistance wire 104 after being electrified melts the ice and snow to reduce the weight of the cable; when the weight of the cable becomes lighter, the influence of the extreme environment on the cable is reduced, and the cable is not prone to breakage, thereby improving the reliability of power supply.
[0029] In summary, the resistance wire 104 generates heat after being electrified to melt the accumulated snow and rime attached to the outer wall of the first sheath 105, thereby reducing the weight of the cable and greatly reducing the risk of cable breakage caused by accumulated snow or rime.
[0030] Embodiment 2
[0031] With reference to Figs. 1-2 For the second embodiment of the utility model, there is a first space 102a between the isolation layer 102 and the insulating layer 103.
[0032] The first space 102a is used to accommodate the cable conductor.
[0033] Further, the insulating layer 103 is provided with a water-blocking layer 106 between the resistance wire 104.
[0034] The water-blocking layer 106 is made of TPEE thermoplastic polyester elastomer material, which can prevent external moisture from entering the cable, prevent external moisture from damaging the cable conductor and the internal tensile member 101, and increase the service life of the cable.
[0035] Further, the water-blocking layer 106 is provided with a heat insulation layer 107 between the resistance wire 104.
[0036] The heat insulation layer 107 is made of neoprene, which protects the internal insulating layer 103 and water-blocking layer 106 from being burned by the heat generated by the resistance wire 104 when electrified, and further protects the internal structure of the cable.
[0037] Further, the tensile member 101 is made of a plurality of steel wires twisted together.
[0038] The tensile member 101 is made of a plurality of galvanized steel wires twisted together, and the lubricating grease is added when the steel wires are twisted to reduce the friction between the steel wires and also to prevent the steel wires from rusting, thereby improving the tensile strength and prolonging the service life.
[0039] Further, the inner wall of the insulation layer 103 is provided with a semi-conductive band 108.
[0040] The semi-conductive band 108 can make the electric field distribution inside the cable more uniform, reduce the concentration of electric charge, realize the gradual transition of the electric field inside and outside the cable head, and thus prevent the generation of partial discharge and breakdown.
[0041] Further, the electric resistance wire 104 is spirally arranged on the outer wall of the heat insulation layer 107.
[0042] The electric resistance wire 104 is spirally wound on the outer wall surface of the heat insulation layer 107, and when the electric resistance wire 104 is wound on the outer wall of the heat insulation layer 107, uniform heat dissipation can be realized, and the electric resistance wire 104 is prevented from being too concentrated to cause excessive heat in the region and burn through the heat insulation layer 107 and the first sheath 105.
[0043] Further, the electric resistance wire 104 is directly connected to a power supply.
[0044] The electric resistance wire 104 is used to heat and melt ice and snow after being powered by directly connecting to the power supply.
[0045] In use, the tensile member 101 bears the axial tension of the cable to protect the cable conductor, the isolation layer 102 prevents the tensile member 101 from contacting the cable conductor to cause electrochemical corrosion, the insulation layer 103 protects the current transmission of the conductor from being affected, the semi-conductive band 108 prevents the generation of partial discharge and breakdown, the water-blocking layer 106 prevents water from entering the inside to damage the cable conductor and the tensile member 101, and the heat insulation layer 107 protects the internal structure from being damaged due to the excessive heating temperature of the electric resistance wire 104; when the cable is covered with ice and snow or wrapped with sleet, the outer wall of the first sheath 105 is actually covered with ice and snow or wrapped with sleet, the electric resistance wire 104 is connected to the power supply to generate heat, and the heat generated by the electric resistance wire 104 after being powered can melt the ice and snow to reduce the weight of the cable, so that the influence of the extreme environment on the cable is reduced and the cable is not easy to break, the reliability of power supply is improved, and the first sheath 105 protects the internal electric resistance wire 104 and the cable conductor from being damaged due to the extreme environment.
[0046] In summary, under the action of the water-blocking layer 106 and the heat insulation layer 107, the external environment is difficult to affect the cable conductor, and the heat generated by the electric resistance wire 104 after being powered can melt the accumulated snow and sleet attached to the outer wall of the first sheath 105, so that the risk of cable breakage caused by accumulated snow or sleet is greatly reduced.
[0047] Embodiment 3
[0048] Reference Figs. 1-2 For the third embodiment of the utility model, the embodiment further provides a compact cable 200 for preventing snow accumulation.
[0049] The first conductor 201 is a conductor inside the cable for transmitting power.
[0050] Further, the first conductor 201 is made of a plurality of conductors twisted together, and a cross section of each of the conductors is trapezoidal. The first conductor 201 is a litz aluminum conductor.
[0051] The cross section of each of the conductors constituting the first conductor 201 is trapezoidal, and the first conductor 201 is made of a plurality of conductors independently insulated and having a trapezoidal cross section. When the conductors are independently insulated, the skin effect of the cable in use can be reduced. It should be noted that the first conductor 201 has a multi-layer structure, each layer is twisted by a plurality of conductors, and the twisting directions of adjacent two layers are opposite to each other so as to offset the torque generated when the wires are twisted. The structure of the whole cable is more compact by tightly pressing the conductors.
[0052] In use, the first space 102a between the isolation layer 102 and the insulation layer 103 is provided with the first conductor 201. The multi-layer adjacent reverse twisting of the first conductor 201 makes the internal structure of the cable more compact. The design of the independent insulation between the conductors makes the current more evenly distributed on each conductor, increases the effective conduction area of the current, and reduces the loss caused by the skin effect. The tensile member 101 bears the axial tension of the cable to protect the first conductor 201. The isolation layer 102 prevents the tensile member 101 from contacting the cable conductor to cause electrochemical corrosion. The insulation layer 103 protects the current transmission of the conductor from being affected. The semi-conductive tape 108 prevents partial discharge and breakdown. The water-blocking layer 106 prevents water from entering the inside to damage the cable conductor and the tensile member 101. The heat insulation layer 107 protects the internal structure from being damaged due to the overheating temperature of the resistance wire 104. When the cable is covered with ice and snow or wrapped with ice, the actual outer wall of the first sheath 105 is covered with ice and snow or wrapped with ice. The resistance wire 104 connected to the power supply generates heat. The heat generated after the resistance wire 104 is powered on melts the ice and snow, reducing the weight of the cable. When the weight of the cable becomes lighter, the influence of the extreme environment on the cable is reduced, and the cable is not easy to break, improving the reliability of power supply. The first sheath 105 protects the internal resistance wire 104 and the cable conductor from being damaged due to the extreme environment.
[0053] In summary, under the action of the water-blocking layer 106 and the heat insulation layer 107, the external environment is difficult to affect the first conductor 201. The first conductor 201 is made of a plurality of independently insulated conductors, so that the current can be evenly distributed on each conductor, increasing the effective conduction area of the current and reducing the loss caused by the skin effect. The resistance wire 104 generates heat when powered on to melt the accumulated snow and ice attached to the outer wall of the first sheath 105, reducing the weight of the cable and greatly reducing the risk of cable breakage caused by accumulated snow or ice.
[0054] It is important to note that the construction and arrangements of the application shown in the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications can be made to the embodiments without departing from the novel teachings and advantages of the subject matter described herein (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.). For example, the elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be modified or changed. Accordingly, all such modifications are intended to be included within the scope of the present inventive subject matter. The order or sequence of any process or method steps can be varied or re-sequenced without departing from the subject matter described herein. Any "device" or "structure" as used herein is intended to encompass a structure which performs the recited function, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventive subject matter. Accordingly, the present inventive subject matter is not limited to particular embodiments described, but extends to any inventive subject matter within the scope of the claims.
[0055] Also, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation can not be described (i.e., those unrelated to the best mode of practicing the present inventive subject matter, or those unrelated to enabling the claimed application).
[0056] It should be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts might be complex and time-consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill in the art having the benefit of this disclosure.
[0057] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the technical solutions of the present application, and all should be included in the scope of the claims of the present application.
Claims
1. A protective structure (100) characterized in that: The anti-pulling piece (101) is provided with an isolation layer (102) on the outer wall, an insulation layer (103) on the outer wall of the isolation layer (102), a resistance wire (104) on the outer wall of the insulation layer (103), and a first sheath (105) on the outer wall of the resistance wire (104).
2. The protective structure of claim 1, wherein: The isolation layer (102) and the insulation layer (103) are provided with a first space (102a).
3. The protective structure of claim 2, wherein: The insulation layer (103) and the resistance wire (104) are provided with a water-blocking layer (106).
4. The protective structure of claim 3, wherein: The water-blocking layer (106) and the resistance wire (104) are provided with a heat-insulating layer (107).
5. The protective structure of claim 4, wherein: The anti-pulling piece (101) is made of a plurality of steel wires.
6. The protective structure of claim 5, wherein: The inner wall of the insulation layer (103) is provided with a semi-conductive belt (108).
7. The protective structure of claim 6, wherein: The resistance wire (104) is spirally arranged on the outer wall of the heat-insulating layer (107).
8. The protective structure of claim 7, wherein: The resistance wire (104) is directly connected with a power supply.
9. A compact cable (200) for preventing snow accumulation, characterized by: The protection structure of any one of claims 1-8 is provided with a first conductor (201) in the first space (102a).
10. The compact cable of claim 9, wherein: The first conductor (201) is made of a plurality of conductors, and the cross section of each conductor is trapezoidal. The first conductor (201) is a litz aluminum conductor.