A stainless steel sheathed optical cable

Abstract

The utility model discloses a stainless steel sheathed optical cable, which relates to the technical field of optical cables. According to the different number of optical fibers in the optical cable, it includes a central bundle tube type stainless steel tube optical unit fire-resistant optical cable structure and a layer-twisted stainless steel tube optical unit fire-resistant optical cable structure, wherein both optical cable structures include optical fibers, stainless steel tubes, inner sheath layers, reinforcements, armor layers, and outer sheath layers, and the stainless steel tubes in both optical cable structures are wrapped around the outside of the optical fibers. The optical cable, by adding an additional stainless steel tube wrapped around the outside of the optical fiber on the basis of the structure of the existing optical cable, can effectively reduce the probability of damage and breakage of the internal optical fiber due to pulling the optical cable hard during wiring, and the optical fiber is not easily burned when encountering a fire, which greatly improves the performance of the optical cable in resisting external adverse factors.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cables, in particular to a stainless steel sheathed optical cable. Background Art

[0002] With the current existing technology, optical fiber cables are coated by injection molding. Although such products are relatively simple to make and have relatively low costs, there is a concern that such products may be pulled hard during wiring, so the wire core inside may be damaged or broken. In addition, these cables are easily burned in the event of a fire. In order to solve the current technical problems, a stainless steel sheathed optical cable is proposed. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a stainless steel sheathed optical cable, which solves the problems raised by the above-mentioned background technology.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a stainless steel sheathed optical cable, including a central bundle tube type stainless steel tube optical unit fire-resistant optical cable structure and a layer-twisted stainless steel tube optical unit fire-resistant optical cable structure, according to the different numbers of optical fibers in the optical cable, wherein both optical cable structures include optical fibers, stainless steel tubes, inner sheath layers, reinforcements, armor layers and outer sheath layers, and the stainless steel tubes in both optical cable structures are wrapped around the outside of the optical fibers.

[0005] Furthermore, the optical fiber includes an optical fiber core arranged in the middle and a grease layer wrapped around the outside of the optical fiber core, and the stainless steel tube is wrapped around the outside of the grease layer.

[0006] Furthermore, in the central bundle-tube stainless steel tube optical unit fire-resistant optical cable structure, the optical fiber is located at the center of the optical cable structure, and with this as the center, a stainless steel tube, an inner sheath layer, an armor layer, and an outer sheath layer are arranged outward in sequence, and the reinforcement is symmetrically arranged in the inner sheath layer.

[0007] Furthermore, in the layer-twisted stainless steel tube optical unit fire-resistant optical cable structure, the reinforcement member is located at the center of the optical cable structure, and with this as the center, the coating layer, optical fiber, inner sheath layer, armor layer, and outer sheath layer are sequentially arranged outward.

[0008] Furthermore, in the two optical cable structures, it is possible to selectively set the tape layer or not. If the tape layer is set in both optical cable structures, in the central bundle tube type stainless steel tube optical unit fire-resistant optical cable structure, the tape layer is set between the inner sheath layer and the armor layer, and in the layer-twisted stainless steel tube optical unit fire-resistant optical cable structure, the tape layer is set between the stainless steel tube and the inner sheath layer.

[0009] Furthermore, a mark is provided on the surface of the stainless steel tube, the mark is a laser printed serial number or sprayed with different colors, and the stainless steel tube is made of 304 stainless steel.

[0010] The utility model provides a stainless steel sheathed optical cable. Compared with the prior art, it has the following beneficial effects:

[0011] This optical cable, by adding an additional stainless steel tube wrapped around the outside of the optical fiber on the basis of the existing optical cable structure, can effectively reduce the probability of damage and breakage of the internal optical fiber due to forceful pulling of the optical cable during wiring. In addition, in the event of a fire, the optical fiber is not easily burned, which greatly improves the performance of the optical cable in resisting adverse external factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of the central bundle tube type stainless steel tube optical unit fire-resistant optical cable of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the utility model of a layer-twisted stainless steel tube optical unit fire-resistant optical cable.

[0014] In the figure: 1. optical fiber; 2. stainless steel tube; 3. inner sheath layer; 4. reinforcement; 5. coating layer; 6. tape layer; 7. armor layer; 8. outer sheath layer. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0016] See also Figure 1 The utility model provides a technical solution: a stainless steel sheathed optical cable. When the number of built-in optical fibers 1 is single, a central bundle tube type stainless steel tube optical unit fire-resistant optical cable can be selected. The structure of this type of optical cable is, from inside to outside, optical fiber 1, grease layer, stainless steel tube 2, inner sheath layer 3, armor layer 7 and outer sheath layer 8, wherein a reinforcement member 4 is also arranged in the inner sheath layer 3. In addition, according to actual needs, an additional tape layer 6 may be arranged between the inner sheath layer 3 and the armor layer 7, or the tape layer 6 may not be arranged. Example

[0017] See also Figure 2The utility model provides a technical solution: a stainless steel sheathed optical cable. When the number of built-in optical fibers 1 is large, a layer-twisted stainless steel tube optical unit fire-resistant optical cable can be selected. The optical cable of this type is structurally composed of a reinforcement member 4, a coating layer 5, a plurality of optical fibers 1 twisted together and externally wrapped with a stainless steel tube 2, an inner sheath layer 3, an armor layer 7, and an outer sheath layer 8 from the inside to the outside. In addition, according to actual needs, an additional tape layer 6 may be provided between the plurality of optical fibers 1 twisted together and externally wrapped with a stainless steel tube 2 and the inner sheath layer 3, or the tape layer 6 may not be provided.

[0018] In addition, it should be noted that in Examples 1 and 2, the stainless steel tube 2 used has the following characteristics:

[0019] 1. Stainless steel tube light units are made of stainless tube materials, while traditional loose tube light units are made of materials such as PBT, PET or PP. In comparison, stainless steel tube light units have the characteristics of high mechanical strength, corrosion resistance and strong resistance to lateral pressure, and are suitable for corrosive application scenarios and application scenarios with high requirements for lateral pressure resistance.

[0020] 2. The stainless steel tube adopts a loose tube structure, and the size is designable. The size can be designed according to the number of optical fiber cores;

[0021] 3. The stainless steel tube light unit adopts surface laser printing serial number or spraying different colors, which can be distinguished when there are many stainless steel tube light units;

[0022] 4. The stainless steel tube optical unit adopts a layer-twisted structure to increase the number of optical cable cores to meet customers' needs for large core counts. However, for optical cables with small core counts, a central tube structure can be used, which can not only meet fire-resistant application scenarios, but also reduce production costs and improve product competitiveness;

[0023] 5. The stainless steel tube optical unit itself has excellent tensile and lateral pressure resistance and large modulus. The optical cable has good mechanical properties and environmental resistance. Compared with PBT or PP loose tube optical cables, this optical cable structure can save aramid yarn or glass yarn armor reinforcement materials, save manufacturing costs, and enhance the market competitiveness of products;

[0024] 6. The stainless steel tube is made of 304 type material with high melting point. This optical cable is particularly suitable for fire-resistant applications and has been certified by a third-party testing agency. The product has passed multiple fire-resistant standard tests BS 6387:2013, IEC 60331:1999, BS 3434-2:2003+A2:2009, BS EN 50200:2015, especially the CWZ grade of the BS 6387:2013 standard with the highest fire resistance rating. C means the burning temperature is 950±40℃ and the burning time is 180min; W means burning for 15min. After 15 minutes of flame application, turn on the water supply of the sprinkler and spray water on the burning area of ​​the cable sample. Continue to spray water for 15 minutes while continuing the flame unless the application of water extinguishes the flame; Z means the burning temperature is 950±40℃, 1 time / 30s, and the whole process is 15min;

[0025] 7. The design of the stainless steel tube optical unit can effectively prevent the biting of rodents. The optical cable has good rodent-proof performance and is suitable for application scenarios with rodent-proof requirements;

[0026] In addition, the inner sheath layer 3 and the outer sheath layer 8 of the optical cable can be made of various materials such as polyethylene, low-smoke halogen-free flame-retardant polyolefin, etc. according to different application scenarios. For example, the low-smoke halogen-free flame-retardant polyolefin sheath material can meet the application scenarios such as flame retardancy and fire resistance; the polyethylene sheath can meet the application scenarios such as corrosiveness, high humidity, and high environmental stress resistance.

Claims

1. A stainless steel sheathed optical cable, characterized in that: Depending on the number of optical fibers in the optical cable, the optical cable comprises a central bundle tube type stainless steel tube optical unit fire-resistant optical cable structure and a layer-twisted stainless steel tube optical unit fire-resistant optical cable structure, wherein both optical cable structures comprise an optical fiber (1), a stainless steel tube (2), an inner sheath layer (3), a reinforcement member (4), an armor layer (7) and an outer sheath layer (8), and the stainless steel tube (2) in both optical cable structures is wrapped around the outside of the optical fiber (1).

2. A stainless steel sheathed optical cable according to claim 1, characterized in that: The optical fiber (1) comprises an optical fiber core arranged in the middle and an oil layer wrapped around the outside of the optical fiber core, and the stainless steel tube (2) is wrapped around the outside of the oil layer.

3. The stainless steel sheathed optical cable according to claim 1, characterized in that: In the central bundle tube type stainless steel tube optical unit fire-resistant optical cable structure, the optical fiber (1) is located at the center of the optical cable structure, and with this as the center, a stainless steel tube (2), an inner sheath layer (3), an armor layer (7), and an outer sheath layer (8) are arranged outward in sequence, and the reinforcement member (4) is symmetrically arranged in the inner sheath layer (3).

4. The stainless steel sheathed optical cable according to claim 1, characterized in that: In the stranded stainless steel tube optical unit fire-resistant optical cable structure, the reinforcement member (4) is located at the center of the optical cable structure, and with this as the center, a coating layer (5), an optical fiber (1), an inner sheath layer (3), an armor layer (7), and an outer sheath layer (8) are sequentially arranged outward.

5. The stainless steel sheathed optical cable according to claim 1, characterized in that: In the two optical cable structures, it is possible to selectively provide a tape layer (6) or not. If the tape layer (6) is provided in both optical cable structures, in the central bundle tube type stainless steel tube optical unit fire-resistant optical cable structure, the tape layer (6) is provided between the inner sheath layer (3) and the armor layer (7), and in the layer-twisted stainless steel tube optical unit fire-resistant optical cable structure, the tape layer (6) is provided between the stainless steel tube (2) and the inner sheath layer (3).

6. The stainless steel sheathed optical cable according to claim 1, characterized in that: The surface of the stainless steel tube (2) is provided with a mark, the mark being a laser printed serial number or sprayed with different colors, and the stainless steel tube (2) is made of 304 stainless steel.

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