Durable cable for an elevator

Abstract

This utility model relates to a durable cable for elevators, comprising, from the inside out, a core wire assembly, a shielding layer, and a water-blocking protective layer. An anti-biting layer is provided between the shielding layer and the water-blocking protective layer. At least one tensile reinforcement is provided within the anti-biting layer on both the front and rear sides of the core wire assembly. The core wire assembly consists of eight cable cores twisted in pairs to form four pairs of twisted insulated cores. An insulation layer is provided on the outside of each pair of twisted insulated cores, and an expanded foamed PP yarn buffer strip is provided on the outside of the insulation layer. This utility model resists high-frequency friction and biological biting through the anti-biting layer, and provides basic tensile strength through multiple tensile reinforcements. The composite reinforced structure formed by these two elements significantly improves tensile strength. This utility model improves bending resistance through a dual-stage foamed PP buffer structure, enhances high-frequency shielding through the shielding layer, and improves waterproof performance through the water-blocking protective layer, making it suitable for various operating scenarios.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator cables, and in particular to a durable cable for elevators. Background Technology

[0002] Elevator traveling cables are specialized cables used in elevator operation. There are elevator traveling cables for video surveillance and elevator traveling cables for digital networks. Elevators are essential transportation devices in high-rise buildings, and they move up and down frequently. The cables that provide power to the elevators also move up and down with them. Moreover, with the development of technology and the needs of people's work and life, communication and monitoring activities are also required inside elevators.

[0003] A search revealed Chinese Patent Publication No. CN220020684U, which discloses a flat elevator cable, comprising an outer sheath, several cable layers, and several reinforcing core layers, all located within the outer sheath; reinforcing core layers are provided within the outer sheath on both the left and right sides of the cable layers; the outer sheath, from the outside to the inside, includes a resistance layer and an elastic layer, and the resistance layer, from the outside to the inside, includes a wear-resistant layer and a heat-insulating layer; the cable layer, from the outside to the inside, includes a shielding layer, an insulation layer, a fireproof layer, and the cable itself.

[0004] Existing elevator cables only use steel wire sheaths and steel wire bundles for the core layer, which have limited tensile strength and insufficient structural strength and durability; moreover, their functions are relatively simple and their adaptability to different scenarios is limited.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a durable cable for elevators, making it more valuable for industrial applications. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a durable cable for elevators.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A durable cable for elevators comprises, from the inside out, a core wire assembly, a shielding layer, and a water-blocking protective layer;

[0009] An anti-biting layer is provided between the shielding layer and the water-blocking protective layer, and at least one tensile skeleton is provided in the anti-biting layer on both the front and rear sides of the core wire assembly.

[0010] The core wire assembly consists of eight cable core wires twisted in pairs to form four pairs of twisted insulated wire cores. An insulation layer is provided on the outside of each pair of twisted insulated wire cores, and an expanded foamed PP yarn buffer strip is provided on the outside of the insulation layer.

[0011] The shielding layer consists of an inner shielding layer, an outer shielding layer, and a spiral winding layer of copper foil wire from the inside out.

[0012] The water-blocking protective layer consists of an inner water-blocking layer, a middle sealing layer, and an outer isolation layer, from the inside out.

[0013] As a further improvement of this utility model, an expanded foamed PP yarn filling column is provided at the center of the four pairs of twisted insulated wire cores.

[0014] As a further improvement of this utility model, the insulation layer is a foamed polyethylene layer.

[0015] As a further improvement of this utility model, the inner shielding layer is an aluminum-plastic composite foil layer, and the outer shielding layer is a tin-plated copper wire shielding layer.

[0016] As a further improvement of this utility model, the anti-biting layer is a Kevlar woven layer.

[0017] As a further improvement of this utility model, the inner water-blocking layer is formed by longitudinal wrapping of water-blocking tape, the middle sealing layer is a halogen-free inner sheath, and the outer isolation layer is a polyether-type polyurethane sheath.

[0018] As a further improvement of this utility model, the tensile skeleton is made of galvanized steel wire reinforcing ribs.

[0019] As a further improvement of this utility model, the cable is formed into a flat structure by a pressure roller.

[0020] By means of the above solution, this utility model has at least the following advantages:

[0021] This invention uses an anti-biting layer to resist high-frequency friction and biological gnawing, and multiple tensile skeletons to provide basic tensile strength. The composite reinforced structure formed by the two significantly improves the tensile performance.

[0022] This invention improves bending resistance through a two-stage foamed PP buffer structure, enhances high-frequency shielding through a shielding layer, and improves waterproof performance through a water-blocking protective layer, making it suitable for various operating scenarios.

[0023] The water-blocking protective layer of this invention forms a triple water-blocking structure through an inner water-blocking layer, a middle sealing layer, and an outer isolation layer, thereby improving environmental tolerance.

[0024] The shielding layer of this invention forms a triple shielding structure through an inner shielding layer, an outer shielding layer, and a copper foil spiral winding layer, which optimizes high-frequency signals and enhances transmission stability.

[0025] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the following are the preferred embodiments of this utility model and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural schematic diagram of a durable cable for elevators according to this utility model;

[0028] Figure 2 yes Figure 1 A schematic diagram of the core wire assembly;

[0029] Figure 3 yes Figure 1 Schematic diagram of the middle shielding layer;

[0030] Figure 4 yes Figure 1 A schematic diagram of the structure of the water-blocking protective layer.

[0031] The meanings of the labels in the figures are as follows.

[0032] Core wire assembly 1, shielding layer 2, anti-eating layer 3, water-blocking protective layer 4, tensile skeleton 5;

[0033] 11. Cable core wire; 12. Insulation layer; 13. Expanded foamed PP yarn buffer strip; 14. Expanded foamed PP yarn filling column;

[0034] Inner shielding layer 21, outer shielding layer 22, copper foil spiral winding layer 23;

[0035] Inner water-blocking layer 41, middle sealing layer 42, outer isolation layer 43. Detailed Implementation

[0036] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] The first embodiment of this utility model:

[0039] like Figure 1 The elevator durable cable of this embodiment includes, from the inside out, a core wire assembly 1, a shielding layer 2, an anti-biting layer 3 and a water-blocking protective layer 4, and at least one tensile skeleton 5 is provided in the anti-biting layer 3 on both the front and rear sides of the core wire assembly 1.

[0040] like Figure 2 The core wire assembly 1 serves as a signal transmission unit and includes a cable core wire 11, an insulation layer 12, an expanded foamed PP yarn buffer strip 13, and an expanded foamed PP yarn filling column 14.

[0041] The cable consists of eight core wires 11 twisted in pairs to form four pairs of twisted insulated wire cores. An insulation layer 12 is provided on the outside of each pair of twisted insulated wire cores. The insulation layer 12 is made of foamed polyethylene material (dielectric coefficient ≤2.2), which improves the high-frequency signal transmission rate (supports 10 Gigabit Ethernet).

[0042] An expansion foamed PP yarn buffer strip 13 is provided on the outside of the insulation layer 12 to resist bending. The bending stress is dispersed by the elastic deformation of the foam particles. It has been tested that it can withstand 10 million 180° bends without breaking.

[0043] A central support structure of expanded foamed PP yarn filling column 14 is set at the center of the four pairs of twisted insulated wire cores to improve the internal structure compactness and buffer the lateral impact force during the movement of the cable chain.

[0044] like Figure 3 The shielding layer 2 consists of an inner shielding layer 21, an outer shielding layer 22, and a copper foil spiral winding layer 23, from the inside out.

[0045] The inner shielding layer 21 is an aluminum-plastic composite foil layer. Four pairs of twisted insulated wire cores are bundled together and then wrapped with an aluminum-plastic composite foil layer (thickness ≥12μm). The longitudinal wrapping process is adopted, and the shielding rate is ≥95%, which isolates crosstalk between wires.

[0046] The outer shield 22 is a tin-plated copper wire shielding layer, and the aluminum-plastic composite foil layer is woven with a tin-plated copper wire shielding layer (weaving density ≥90%). At the same time, a copper foil spiral winding layer 23 is superimposed to form a triple shielding structure with attenuation ≤32.8dB / 100m in the high frequency band (250MHz).

[0047] Strengthen structural design:

[0048] Tensile reinforcement 5: Galvanized steel wire reinforcing ribs (diameter 0.8-1.2mm) are arranged parallel outside the shielding layer 2, evenly distributed along the length of the cable (spacing 10-15mm), using a flat cable reinforcement design, with a tensile strength ≥500N.

[0049] Anti-biting layer 3: The outer side of the reinforcing rib (tensile skeleton 5) is wrapped with Kevlar filament braid, with a basis weight ≥200g / m², to resist biological biting and mechanical friction.

[0050] Water-blocking protective structure design:

[0051] like Figure 4 The water-blocking protective layer 4 consists of an inner water-blocking layer 41, a middle sealing layer 42, and an outer isolation layer 43, from the inside out.

[0052] The inner water-blocking layer 41 is formed by longitudinal wrapping of water-blocking tape. The Kevlar woven layer contains longitudinally wrapped water-blocking tape that expands when exposed to water, with a water absorption rate of ≥150%.

[0053] The middle sealing layer 42 is a halogen-free inner sheath, and the water-blocking strip is an extruded halogen-free inner sheath with a thickness of ≥0.5mm to prevent water penetration.

[0054] The outer isolation layer 43 is a polyether-type polyurethane sheath, which is resistant to salt spray corrosion (no degradation after 500 hours).

[0055] This embodiment breaks through the limitations of a single scenario and achieves a comprehensive upgrade in terms of durability, environmental adaptability, and signal stability, making it more in line with the modern industrial demand for "multifunctional and highly reliable" cables.

[0056] The second embodiment of this utility model:

[0057] The manufacturing process of a durable cable for elevators in the first embodiment above:

[0058] 1. Core wire preparation: Twist eight Category 7 conductors, i.e. cable core wires (diameter 0.5mm), in pairs (pitch 10-15mm), and wrap them with 0.05mm thick expanded foam PP yarn buffer tape to form four pairs of twisted units.

[0059] 2. Clustered shielding: Four pairs of twisted units surround the central expanded foamed PP yarn filling column, which is then sequentially covered with aluminum-plastic composite foil (overlap rate ≥15%), tin-plated copper wire braided layer (coverage rate ≥90%), and copper foil wire spiral winding layer (pitch 8-12mm).

[0060] 3. Reinforcement and water resistance: Three galvanized steel wires (spaced 20mm apart) are laid parallel outside the shielding layer, wrapped with Kevlar braided layer, longitudinally wrapped with water-swellable water-resistant tape, and extruded with a 0.8mm thick halogen-free inner sheath.

[0061] 4. Outer sheath molding: The outer sheath is extruded using polyether-type polyurethane material, with a thickness controlled at 1.2-1.5mm and a surface roughness Ra≤1.6μm.

[0062] In addition, the cable is formed into a flat structure by pressure rollers. The flat structure design (width 20-30mm) is combined with reinforcing ribs to resist vertical tension, making it suitable for high-speed elevators.

[0063] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0064] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A durable cable for elevators, comprising, from the inside out, a core wire assembly (1), a shielding layer (2) and a water-blocking protective layer (4); Its features are: An anti-biting layer (3) is provided between the shielding layer (2) and the water-blocking protective layer (4), and at least one tensile skeleton (5) is provided in the anti-biting layer (3) on both the front and rear sides of the core wire assembly (1). The core wire assembly (1) consists of eight cable core wires (11) twisted in pairs to form four pairs of twisted insulated core wires. An insulation layer (12) is provided on the outside of each pair of twisted insulated core wires, and an expansion foamed PP yarn buffer strip (13) is provided on the outside of the insulation layer (12). The shielding layer (2) consists of an inner shielding layer (21), an outer shielding layer (22), and a copper foil spiral winding layer (23) from the inside to the outside. The water-blocking protective layer (4) consists of an inner water-blocking layer (41), a middle sealing layer (42), and an outer isolation layer (43) from the inside to the outside.

2. The durable cable for elevators as described in claim 1, characterized in that, An expanded foamed PP yarn filling column (14) is provided at the center of the four pairs of twisted insulated wire cores.

3. The durable cable for elevators as described in claim 1, characterized in that, The insulating layer (12) is a foamed polyethylene layer.

4. The durable cable for elevators as described in claim 1, characterized in that, The inner shielding layer (21) is an aluminum-plastic composite foil layer, and the outer shielding layer (22) is a tin-plated copper wire shielding layer.

5. The durable cable for elevators as described in claim 1, characterized in that, The anti-biting layer (3) is a Kevlar woven layer.

6. The durable cable for elevators as described in claim 1, characterized in that, The inner water-blocking layer (41) is formed by longitudinal wrapping of water-blocking tape, the middle sealing layer (42) is a halogen-free inner sheath, and the outer isolation layer (43) is a polyether-type polyurethane sheath.

7. The durable cable for elevators as described in claim 1, characterized in that, The tensile skeleton (5) is a galvanized steel wire reinforcing bar.

8. The durable cable for elevators as described in claim 1, characterized in that, The cable is formed into a flat structure by a pressure roller.

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