Flexible tensile elevator trailing cable

Abstract

The utility model relates to a kind of flexible tensile type elevator along cable, including sheath unit, video communication cable unit, wire core unit and steel core stranding unit, wire core unit is installed in the sheath unit of video communication cable unit left and right sides;Sheath unit from outside to inside includes outer sheath layer and inner sheath layer in proper order, and several same interval interval grooves are evenly provided on the outside of outer sheath layer along its longitudinal direction, and interval groove is along transverse distribution.The utility model is adapted to each other by the mutual adaptation of steel core stranding unit and aramid yarn reinforcing layer, and tensile strength is improved compared with traditional steel wire structure, and the demand of frequent start-stop of high-speed elevator is adapted.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator traveling cables, and in particular to a flexible tensile-resistant elevator traveling cable. 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. CN220020683U, which discloses an elevator traveling cable, including a sheath unit, a video communication cable unit, a steel core stranded unit, and a wire core unit; steel core stranded units are provided inside the video communication cable unit between adjacent video communication cable units and wire core units, and inside the video communication cable unit outside the wire core unit; the video communication cable unit includes, from the outside to the inside, a first insulation layer, a first shielding layer, and a video communication cable; the wire core unit includes, from the outside to the inside, a second shielding layer, a second insulation layer, and several wire cores.

[0004] Existing elevator traveling cables have insufficient tensile and bending resistance. Traditional steel wire load-bearing structures are prone to fatigue fracture when frequently bent, affecting their service life.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a flexible tensile-resistant elevator traveling cable, which would have greater industrial application value. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a flexible tensile-resistant elevator traveling cable.

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

[0008] A flexible tensile-resistant elevator traveling cable includes a sheath unit, a video communication cable unit, a core unit, and a steel core stranded unit. Core units are installed in the sheath units on both the left and right sides of the video communication cable unit.

[0009] The sheath unit consists of an outer sheath layer and an inner sheath layer from the outside to the inside. Several equally spaced slots are evenly distributed on the outer side of the outer sheath layer along its longitudinal direction, and the slots are distributed along the transverse direction.

[0010] The outer sheath layer consists of a polyvinyl chloride layer and a rubber layer from the outside to the inside;

[0011] The inner sheath layer consists of a TPU layer and an aramid yarn reinforcement layer from the outside to the inside;

[0012] The video communication cable unit includes a filler post located at the inner center, several soft copper wire conductors evenly distributed along the circumference outside the filler post, and a cable sheath layer installed outside the soft copper wire conductors.

[0013] As a further improvement of this utility model, steel core stranded units are installed in the sheath unit between adjacent video communication cable units and core units, as well as in the sheath unit outside the core unit.

[0014] As a further improvement of this utility model, the steel core stranded unit is composed of multiple strands of stranded steel wire.

[0015] As a further improvement of this utility model, the aramid yarn reinforcing layer includes, from the outside to the inside, a first aramid yarn layer, a second aramid yarn layer and a third aramid yarn layer. The first aramid yarn layer and the third aramid yarn layer have the same winding direction and are opposite to the winding direction of the second aramid yarn layer.

[0016] As a further improvement of this utility model, the cable sheath layer includes, from the inside out, a metal shielding layer, an insulation layer, and a fireproof sleeve.

[0017] As a further improvement of this utility model, the metal shielding layer is an aluminum foil layer, the insulation layer is a PE layer, and the fireproof sleeve is a ceramicized silicone rubber layer.

[0018] As a further improvement of this utility model, the width of the partition groove is 10~15mm and the depth of the partition groove is 5~8mm.

[0019] As a further improvement of this utility model, the core unit is made of flexible 5-type bare copper wire twisted together, with a pitch ratio of 10~14.

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

[0021] This invention improves tensile strength compared to traditional steel wire structures by matching the steel core stranded unit with the aramid yarn reinforcement layer, thus meeting the needs of frequent start-stop operations in high-speed elevators.

[0022] This invention reduces the minimum bending radius of the cable by creating several interval slots on the outer sheath layer. Combined with the flexible conductor and sheath unit, it significantly reduces the risk of bending fatigue fracture.

[0023] This utility model, through a sheath unit composed of an outer sheath layer and an inner sheath layer, can adapt to working environments with temperatures ranging from -30℃ to 80℃. It does not harden at low temperatures or soften at high temperatures, making it suitable for regions with large temperature differences between the north and south.

[0024] 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

[0025] 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.

[0026] Figure 1 This is a structural schematic diagram of a flexible tensile-resistant elevator traveling cable according to this utility model;

[0027] Figure 2 yes Figure 1 A partial structural diagram of the inner and outer sheath layers;

[0028] Figure 3 yes Figure 1 Schematic diagram of the internal structure of the inner and outer sheath layers;

[0029] Figure 4 yes Figure 1 Schematic diagram of the internal structure of the inner sheath layer;

[0030] Figure 5 yes Figure 4 Schematic diagram of the internal structure of the aramid yarn reinforcement layer;

[0031] Figure 6 yes Figure 1 Internal structure diagram of a mid-range video communication cable unit;

[0032] Figure 7 yes Figure 6 A schematic diagram of the internal structure of the cable sheath layer.

[0033] The meanings of the labels in the figures are as follows.

[0034] Outer sheath layer 1, inner sheath layer 2, video communication cable unit 3, wire core unit 4, steel core stranded unit 5, spacer groove 6;

[0035] Polyvinyl chloride layer 11, rubber layer 12;

[0036] TPU layer 21, aramid yarn reinforcement layer 22;

[0037] First aramid yarn layer 221, second aramid yarn layer 222, third aramid yarn layer 223;

[0038] Cable sheath layer 31, soft copper wire conductor 32, filler post 33;

[0039] Metal shielding layer 311, insulation layer 312, fireproof sleeve 313. Detailed Implementation

[0040] The specific embodiments of this utility model will be further described in 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 the scope of this utility model.

[0041] 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.

[0042] The first embodiment of this utility model:

[0043] like Figure 1 As shown in the figure, a flexible tensile-resistant elevator traveling cable of this embodiment mainly includes a sheath unit, a video communication cable unit 3, a wire core unit 4, and a steel core stranded unit 5.

[0044] Among them, the video communication cable unit 3 is located in the middle of the transverse direction inside the sheath unit. The core unit 4 is installed in the sheath unit on both the left and right sides of the video communication cable unit 3. The steel core stranded unit 5 is installed in the sheath unit between the adjacent video communication cable unit 3 and the core unit 4, as well as in the sheath unit outside the core unit 4.

[0045] The sheath unit consists of an outer sheath layer 1 and an inner sheath layer 2 from the outside to the inside.

[0046] like Figure 2 On the outer side of the outer sheath layer 1, a number of equally spaced interval grooves 6 are uniformly opened along its longitudinal direction, and the interval grooves 6 are distributed along the transverse direction.

[0047] The width of the spacer 6 is 10mm and the depth of the spacer 6 is 5mm.

[0048] The slot 6 provides a bending buffer space, reducing the minimum bending radius of the cable by 20% and preventing the outer sheath layer 1 from breaking due to fatigue from repeated bending.

[0049] like Figure 3 The outer sheath layer 1 consists of a polyvinyl chloride layer 11 and a rubber layer 12 from the outside to the inside.

[0050] The aforementioned polyvinyl chloride layer 11 and rubber layer 12 are composite (with the same thickness). The polyvinyl chloride layer 11 provides structural strength, while the rubber layer 12 imparts low-temperature flexibility, ensuring that the cable does not harden in an environment with a temperature of -30°C and that its bending performance is stable.

[0051] like Figure 4 and Figure 5 The inner sheath layer 2 consists of a TPU layer 21 and an aramid yarn reinforcement layer 22 from the outside to the inside.

[0052] Among them, TPU layer 21 is made of low-smoke halogen-free flame-retardant TPU material, which has flame-retardant and corrosion-resistant properties and meets fire safety standards.

[0053] The wear resistance and structural stability are improved by wrapping the inner video communication cable unit 3, core unit 4, and steel core stranded unit 5 with aramid yarn reinforcement layer 22.

[0054] Specifically, the aramid yarn reinforcing layer 22 includes, from the outside to the inside, a first aramid yarn layer 221, a second aramid yarn layer 222, and a third aramid yarn layer 223. The first aramid yarn layer 221 and the third aramid yarn layer 223 are wound in the same direction and are opposite to the winding direction of the second aramid yarn layer 222.

[0055] By designing the winding direction of the first aramid yarn layer 221, the second aramid yarn layer 222, and the third aramid yarn layer 223, the second aramid yarn layer 222 can form a mesh-like structure with the first aramid yarn layer 221 and the third aramid yarn layer 223, which can enhance strength and make it more wear-resistant.

[0056] like Figure 6 and Figure 7 The video communication cable unit 3 mainly includes a cable sheath layer 31, a soft copper wire conductor 32, and a filler post 33.

[0057] The filler post 33 is located at the center of the inner side. Several soft copper wire conductors 32 are evenly distributed along the circumference on the outer side of the filler post 33. The steel core stranded unit 5 is composed of multiple stranded steel wires. A cable sheath layer 31 is installed on the outer side of the soft copper wire conductors 32.

[0058] The cable sheath layer 31 includes, from the inside out, a metal shielding layer 311, an insulation layer 312, and a fireproof sleeve 313.

[0059] The outer metal shielding layer 311 (high-density metal wire woven mesh or aluminum foil layer, coverage density ≥95%) effectively suppresses electromagnetic interference; the middle insulation layer 312 (PE layer) is insulated; and the outer fireproof sleeve (ceramized silicone rubber layer) enhances fire safety.

[0060] The low-smoke, halogen-free flame-retardant TPU layer 21, fireproof sleeve 313, and metal shielding layer 311 meet the GB / T19666-2005 flame-retardant standard while ensuring stable signal transmission.

[0061] In addition, the core unit 4 is made of flexible Category 5 bare copper wire twisted together, with a pitch ratio of 10 to 14, which improves the overall flexibility.

[0062] The second embodiment of this utility model:

[0063] A brief description of the manufacturing process of a flexible tensile-resistant elevator traveling cable in this embodiment:

[0064] Conductor preparation: The conductor of core unit 4 is made of soft Category 5 bare copper wire with a diameter of 0.15mm and a pitch ratio of 12. The conductor of video communication cable unit 3 (i.e. soft copper wire conductor 32) is made of 7 strands of soft copper wire with an outer diameter of 2.0mm.

[0065] Shielding and insulation: The soft copper wire conductor 32 is wrapped with a metal shielding layer 311 (coverage density 95%), an insulation layer 312 (thickness 0.3mm) and a fireproof sleeve 313 (ceramized silicone rubber material).

[0066] Tensile structure assembly: The steel core stranded unit 5 on the center side (each group of 5 strands of galvanized steel wire with a diameter of Φ1.0mm stranded) and the steel core stranded unit 5 on the outer side (each group of 3 strands of galvanized steel wire with a diameter of Φ1.0mm stranded) are arranged in parallel with the video communication cable unit 3 and the core unit 4. The outer layer is a three-layer aramid yarn reinforced layer 22 (the first aramid yarn layer 221 and the third aramid yarn layer 223 are wound clockwise, and the second aramid yarn layer 222 is wound counterclockwise).

[0067] Sheath molding: TPU layer 21 (1.5mm thick) is prepared by co-extrusion process. Equidistant grooves (i.e., spacer grooves 6) are pressed out on the outer surface by a mold. Finally, extruded polyvinyl chloride layer 11 (0.8mm thick) and rubber layer 12 (0.8mm thick) are combined to form outer sheath layer 1.

[0068] 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.

[0069] 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.

[0070] 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 flexible tensile-resistant elevator traveling cable, comprising a sheath unit, a video communication cable unit (3), a core unit (4) and a steel core stranded unit (5), wherein the core unit (4) is installed in the sheath unit on both the left and right sides of the video communication cable unit (3). Its features are: The sheath unit includes an outer sheath layer (1) and an inner sheath layer (2) from the outside to the inside. Several spacer slots (6) with the same spacing are evenly opened on the outer side of the outer sheath layer (1) along its longitudinal direction, and the spacer slots (6) are distributed along the transverse direction. The outer sheath layer (1) consists of a polyvinyl chloride layer (11) and a rubber layer (12) from the outside to the inside. The inner sheath layer (2) includes a TPU layer (21) and an aramid yarn reinforcement layer (22) from the outside to the inside. The video communication cable unit (3) includes a filling post (33) located at the inner center, and a number of soft copper wire conductors (32) are evenly distributed along the circumferential direction on the outside of the filling post (33). A cable sheath layer (31) is installed on the outside of the soft copper wire conductors (32).

2. The flexible tensile-resistant elevator traveling cable as described in claim 1, characterized in that, Steel core stranded units (5) are installed in the sheath unit between adjacent video communication cable units (3) and core units (4) as well as in the sheath unit outside the core unit (4).

3. The flexible tensile-resistant elevator traveling cable as described in claim 2, characterized in that, The steel core stranded unit (5) is composed of multiple strands of stranded steel wire.

4. The flexible tensile-resistant elevator traveling cable as described in claim 1, characterized in that, The aramid yarn reinforcement layer (22) includes, from the outside to the inside, a first aramid yarn layer (221), a second aramid yarn layer (222) and a third aramid yarn layer (223). The first aramid yarn layer (221) and the third aramid yarn layer (223) have the same winding direction and are opposite to the winding direction of the second aramid yarn layer (222).

5. The flexible tensile-resistant elevator traveling cable as described in claim 1, characterized in that, The cable sheath layer (31) includes, from the inside out, a metal shielding layer (311), an insulation layer (312), and a fireproof sleeve (313).

6. The flexible tensile-resistant elevator traveling cable as described in claim 5, characterized in that, The metal shielding layer (311) is an aluminum foil layer, the insulating layer (312) is a PE layer, and the fireproof sleeve (313) is a ceramicized silicone rubber layer.

7. The flexible tensile-resistant elevator traveling cable as described in claim 1, characterized in that, The width of the spacer groove (6) is 10~15mm, and the depth of the spacer groove (6) is 5~8mm.

8. The flexible tensile-resistant elevator traveling cable as described in claim 1, characterized in that, The core unit (4) is made of flexible soft Class 5 bare copper wire twisted together, with a pitch ratio of 10~14.

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