A new type of lead-in sheathed cable

Abstract

The utility model provides a novel lead -in rubber -covered wire optical cable, including the outer periphery protection layer, the outer periphery protection layer inside both sides are provided with the outer periphery reinforcing element, the middle position of outer periphery protection layer is equipped with the through slot, just the inside of through slot is provided with the optical fiber sheath, the inside symmetry of optical fiber sheath is provided with transmission optical fiber, the traction slot on the outer protection layer is convenient for the traction rope to carry out the joint fixing, improves the connecting strength between both when carrying out the wall internal pipeline threading, compared with the traditional traction rope through the adhesive tape and the outer protection layer fixed, has the stable firm advantage, and the traction slot one side traction mouth is convenient for the traction rope to carry out the adhesion, reduces the space of traction rope and outer protection layer when passing through the wall internal pipeline, this design has reduced the resistance when the outer protection layer pipe -through greatly.

Description

Technical Field

[0001] This utility model is a novel introduction of drop optical cable, belonging to the field of optical communication technology. Background Technology

[0002] With the rapid development of fiber optic communication technology, Fiber to the Home (FTTH) has become the mainstream broadband access method. Drop cables, as a key component connecting user terminals and the optical distribution network, directly affect communication quality and operational safety. Existing optical cables suffer from insufficient mechanical strength, and traditionally, optical fibers are typically secured with tape when attached to the cable by the cable pulling machine, posing a risk of detachment. Therefore, a new type of optical cable with optimized structure and superior performance is urgently needed to address these issues. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of drop cable to solve the problems mentioned in the background art, such as insufficient mechanical strength of existing optical cables and the fact that traditional optical fibers are usually fixed with tape when fixed to the traction rope of the tube pulling machine, which makes them easy to fall off.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a novel drop cable includes an outer protective layer, outer reinforcing elements are provided on both sides inside the outer protective layer, a through slot is provided in the middle of the outer protective layer, and an optical fiber sheath is provided inside the through slot, and transmission optical fibers are symmetrically arranged inside the optical fiber sheath.

[0005] Furthermore, the outer protective layer is a strip structure with chamfered corners on both sides of the cross section, and the outer protective layer is made of black polyethylene material.

[0006] Furthermore, the peripheral reinforcing element is a rod-shaped structure made of glass-reinforced plastic, and the diameter of the peripheral reinforcing element is 2mm.

[0007] Furthermore, the optical fiber sheath has notches on both sides, the notches being slot structures with an isosceles triangular cross-section, and the notches are arranged linearly along the central axis of the optical fiber sheath.

[0008] Furthermore, the outer surface of the outer protective layer is provided with a traction groove, which is a ring groove hole structure with a semi-circular cross-section.

[0009] Furthermore, a traction port is provided at the edge of the traction groove, and the traction port is set parallel to the central axis of the traction groove.

[0010] The beneficial effects of this utility model are: the peripheral reinforcement elements are distributed on both sides of the transmission optical fiber, and the peripheral reinforcement elements provide the peripheral protective layer with good tensile strength and lateral pressure resistance. The fiber optic sheath is made of halogen-free flame-retardant polymer material, which gives it good flame retardancy. In addition, the material of the fiber optic sheath meets the low-smoke halogen-free standard, and this design makes it meet the requirements of environmental protection and safety. The notches provided on the fiber optic sheath give it good bending resistance and provide deformation space after bending, preventing the fiber optic sheath from deforming and cracking under external force. The traction groove on the outer protective layer facilitates the clamping and fixing of the traction rope, improving the connection strength between the two when threading pipes inside the wall. Compared with the traditional method of fixing the traction rope to the outer protective layer with tape, it has the advantage of stability and firmness. The traction port located on one side of the traction groove facilitates the fitting of the traction rope, reducing the space between the traction rope and the outer protective layer when the pipe passes through the wall. This design significantly reduces the resistance of the outer protective layer when threading pipes. Attached Figure Description

[0011] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of a novel drop fiber optic cable according to the present invention; Figure 2 This is a cross-sectional view of a novel drop fiber optic cable according to the present invention. Figure 3 This is a schematic diagram showing the distribution of the traction groove in a novel drop optical cable according to this utility model; In the diagram: 1-outer protective layer, 2-outer reinforcing element, 3-fiber sheath, 4-transmission fiber, 5-notch, 6-traction groove, 7-traction port. Detailed Implementation

[0012] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0013] Please see Figure 1 and Figure 2This utility model provides a technical solution: a novel drop fiber optic cable, including an outer protective layer 1. The outer protective layer 1 is a strip structure with chamfered corners on both sides of the cross section. This design has a larger surface area than traditional fiber optic cables, which increases the contact area with concrete when it is buried in the wall, thus facilitating installation. The outer protective layer 1 is made of black polyethylene material, which has good weather resistance, UV resistance, and moisture resistance. The outer protective layer 1 has outer reinforcing elements 2 on both sides inside. The outer reinforcing elements 2 are rod-shaped structures made of glass-reinforced plastic with a diameter of 2mm. The outer reinforcing elements 2 provide the outer protective layer 1 with good tensile and lateral pressure resistance. A through-slot is opened in the middle of the outer protective layer 1, and an optical fiber sheath 3 is set inside the through-slot. Transmission optical fibers 4 are symmetrically arranged inside the optical fiber sheath 3. The transmission optical fibers 4 conform to the ITU-T G.652 / G.657.A1 standard.

[0014] The optical fiber sheath 3 has notches 5 on both sides. The notches 5 are slot structures with an isosceles triangular cross section, and the notches 5 are arranged linearly along the central axis of the optical fiber sheath 3. The notches 5 give the optical fiber sheath 3 good bending resistance and can provide deformation space after the optical fiber sheath 3 bends, preventing the optical fiber sheath 3 from deforming and cracking after being subjected to external force.

[0015] Please see Figure 3 The outer surface of the outer protective layer is provided with a traction groove 6, which is a semi-circular annular groove structure. The traction groove 6 on the outer protective layer facilitates the clamping and fixing of the traction rope, improving the connection strength between the two when threading pipes inside the wall. Compared with the traditional method of fixing the traction rope to the outer protective layer with tape, it has the advantages of stability and firmness. A traction port 7 is provided at the edge of the traction groove 6. The traction port 7 is set parallel to the central axis of the traction groove 6. The traction port 7 facilitates the traction rope to fit together, reducing the space between the traction rope and the outer protective layer when the pipe passes through the wall. This design greatly reduces the resistance of the outer protective layer when passing through the pipe.

[0016] Detailed Implementation: During pipe threading, the pipe threading machine first passes the traction rope through the pipe and ties it to the traction groove 6. Then, the edge of the traction rope is secured to the traction port 7. Next, the traction rope is retrieved by the pipe threading machine. At this time, the outer protective layer enters the interior of the pipe under the action of the pipe threading machine. Because the traction rope is secured to the traction groove 6, the design of the traction groove 6 improves the connection strength between the two. The traction port 7 facilitates the traction rope's fit and reduces the space between the traction rope and the outer protective layer when the pipe passes through the wall. This design significantly reduces the resistance of the outer protective layer during pipe threading. The outer reinforcing element 2 is distributed in the transmission... On both sides of the optical fiber 4, the outer peripheral reinforcement element 2 provides the outer peripheral protective layer 1 with good tensile strength and lateral pressure resistance. The optical fiber sheath 3 is made of halogen-free flame-retardant polymer material, which gives it good flame retardancy. The material of the optical fiber sheath 3 meets the low smoke and halogen-free standard, thus meeting the requirements of environmental protection and safety, ensuring that no toxic gases are released in the event of a fire. The notch 5 set on the optical fiber sheath 3 increases its deformation range when the optical fiber sheath 3 bends, giving the optical fiber sheath 3 good bending resistance. After the optical fiber sheath 3 bends, it can provide deformation space to prevent the optical fiber sheath 3 from deforming and cracking after being subjected to external force.

[0017] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel drop fiber optic cable, comprising an outer protective layer (1), characterized in that: The outer peripheral protective layer (1) has an outer peripheral reinforcing element (2) on both sides inside. The outer peripheral protective layer (1) has a through slot in the middle and an optical fiber sheath (3) inside the through slot. The optical fiber sheath (3) has transmission optical fibers (4) symmetrically arranged inside. The outer surface of the outer peripheral protective layer (1) has a traction groove (6). The traction groove (6) is a ring groove hole structure with a semi-circular cross section. The edge of the traction groove (6) has a traction port (7). The traction port (7) is set parallel to the central axis of the traction groove (6).

2. The novel drop fiber optic cable according to claim 1, characterized in that: The outer protective layer (1) is a strip structure with chamfered corners on both sides of the cross section, and the outer protective layer (1) is made of black polyethylene material.

3. A novel drop fiber optic cable according to claim 2, characterized in that: The peripheral reinforcing element (2) is a rod-shaped structure made of glass-reinforced plastic, and the diameter of the peripheral reinforcing element (2) is 2 mm.

4. A novel drop fiber optic cable according to claim 3, characterized in that: The optical fiber sheath (3) has notches (5) on both sides. The notches (5) are slot structures with an isosceles triangle cross section, and the notches (5) are arranged linearly along the central axis of the optical fiber sheath (3).

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