Central tube type compression resistant waterproof cable

Abstract

The utility model discloses a kind of central tube type compression-proof waterproof cable, including outer sheath, phosphating steel wire wrapping layer, water-blocking layer, thimble and light beam, the inner side of outer sheath is provided with thimble, and thimble inside is inserted with optical fiber bundle;In the utility model, longitudinal tension support is provided by phosphating steel wire wrapping layer, while dispersing external radial pressure, reducing the risk of optical cable pressure deformation, water-blocking layer of rubber water-blocking belt type, material elasticity can be used to absorb impact energy, further resist extrusion and bending stress, by the water-blocking layer of fiber paste filled in thimble, thimble outer surface winding installation, and water-blocking ring of water-blocking layer outer surface is evenly spacedly sleeved, multiple waterproof structure is formed, water-swelling rubber embedded in water-blocking ring outer ring can rapidly block water seepage path, realize cable longitudinal and radial waterproof, compared with prior art, give consideration to the advantage of waterproof and compression-proof, significantly improve the compression and waterproof performance of cable.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a central tube type pressure-resistant and waterproof cable. Background Technology

[0002] Center-tube cable, also known as optical fiber composite overhead ground wire cable (OPGW), is a type of optical cable in which optical fibers are placed inside the ground wire of an overhead high-voltage transmission line to form an optical fiber communication network on the transmission line. This structure combines the functions of a ground wire and communication, and is mainly used in communication lines of 110kV, 220kV, 500kV, 750kV and newly built overhead high-voltage transmission systems. It can also be used to replace the existing ground wires of old overhead high-voltage transmission systems, add optical communication lines, conduct short-circuit currents and provide lightning protection.

[0003] Existing technologies, such as Chinese Patent No. CN204086633U, propose a non-metallic central tube cable, comprising an optical fiber bundle, fiber grease, a PBT loose tube, a non-metallic reinforcing rod, and an outer sheath. The optical fiber bundle is disposed inside the PBT loose tube, the outer sheath is sleeved on the outer wall of the PBT loose tube, and the non-metallic reinforcing rod is disposed between the outer sheath and the PBT loose tube. The optical fiber bundle includes one or more optical fibers, and the PBT loose tube is filled with fiber grease. This type of cable has a simple and compact structure, a significantly reduced bending outer diameter, and is lightweight, thereby reducing the overall cost of the cable.

[0004] However, the cable's pressure resistance and waterproofing are still not high enough. It still cannot solve the problems of the internal wires rubbing against each other when the cable is squeezed, eventually leading to a short circuit and burning out electrical appliances, as well as the problem of water entering and damaging the optical fiber bundle due to incomplete waterproofing.

[0005] To address this issue, a central tube-type pressure-resistant and waterproof cable is proposed, which possesses the advantages of pressure resistance and waterproofing, thereby solving the problems mentioned in the background technology. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a central tube type pressure-resistant and waterproof cable.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a central tube type pressure-resistant and waterproof cable, comprising an outer sheath, a phosphated steel wire wrapping layer, a water-blocking layer, a loose tube, and a fiber bundle. The loose tube is provided inside the outer sheath, and the fiber bundle is inserted inside the loose tube. The gap between the loose tube and the fiber bundle is filled with fiber grease, and the outer surface of the loose tube is wrapped with a water-blocking layer. Several water-blocking rings are evenly spaced on the outer surface of the water-blocking layer, and the phosphated steel wire wrapping layer is wrapped around the outside of the several water-blocking rings. Water-swellable rubber is embedded in the outer ring of each water-blocking ring. The phosphated steel wire wrapping layer is in contact with the inner side of the outer sheath, and the outer sheath is extruded on the outer surface of the phosphated steel wire wrapping layer.

[0008] As a further description of the above technical solution: the water-blocking ring is composed of a left half ring and a right half ring, and the outer rings of both the left half ring and the right half ring have arc-shaped grooves corresponding to the water-swellable rubber. The end face of the left half ring is integrally formed with a locking block, and the end face of the right half ring has a locking groove corresponding to the locking block. The locking block and the locking groove are engaged with each other.

[0009] As a further description of the above technical solution: the material of the water-blocking layer is a rubber water-blocking tape, and the thickness of the water-blocking layer of the rubber water-blocking tape material is 0.5mm-2.0mm.

[0010] As a further description of the above technical solution: one end of the card block is provided with an arc-shaped protrusion, and the inner side of the card slot is provided with a connecting groove with a sloping surface corresponding to the arc-shaped protrusion.

[0011] As a further description of the above technical solution: the outer sheath is made of HDPE or polyethylene, and the outer surface of the loose tube is wrapped with a foam plastic pressure-resistant layer.

[0012] As a further description of the above technical solution: the material of the water-blocking ring is polyethylene or silicone, and CFR-1633 flame-retardant cotton is filled between two adjacent water-blocking rings.

[0013] This utility model has the following beneficial effects:

[0014] In this invention, the phosphated steel wire wrapping layer provides longitudinal tension support while dispersing external radial pressure, reducing the risk of optical cable deformation under pressure. The rubber water-blocking tape type water-blocking layer can absorb impact energy using material elasticity, further resisting compression and bending stress. The fiber paste filled inside the loose tube, the water-blocking layer wrapped around the outer surface of the loose tube, and the water-blocking rings evenly spaced on the outer surface of the water-blocking layer form a multi-layer waterproof structure. The water-swellable rubber embedded in the outer ring of the water-blocking ring can quickly seal the seepage path, achieving longitudinal and radial waterproofing of the cable. Compared with the prior art, it combines the advantages of waterproofing and pressure resistance, significantly improving the cable's pressure resistance and waterproofing performance. Attached Figure Description

[0015] Figure 1 This is a longitudinal cross-sectional structural diagram of a central tube type pressure-resistant and waterproof cable according to the present invention;

[0016] Figure 2 This is a three-dimensional view of a central tube type pressure-resistant and waterproof cable according to the present invention;

[0017] Figure 3 This is a cross-sectional view of the water-blocking ring;

[0018] Figure 4 This is a 3D diagram of the water-blocking ring.

[0019] Legend:

[0020] 1. Outer sheath; 2. Phosphated steel wire wrapping layer; 3. Water-blocking layer; 4. Loose tube; 5. Fiber bundle; 6. Fiber grease; 7. Water-blocking ring; 8. Left half ring; 9. Right half ring; 10. Water-swellable rubber; 11. Locking block; 12. Locking groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] According to an embodiment of the present invention, a central tube type pressure-resistant and waterproof cable is provided.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, a central tube type pressure-resistant and waterproof cable according to an embodiment of the present invention includes an outer sheath 1, a phosphated steel wire wrapping layer 2, a water-blocking layer 3, a loose tube 4, and a fiber bundle. The loose tube 4 is provided inside the outer sheath 1, and an optical fiber bundle 5 is inserted inside the loose tube 4. Fiber grease 6 fills the gap between the loose tube 4 and the optical fiber bundle 5. A water-blocking layer 3 is wound around the outer surface of the loose tube 4. A plurality of water-blocking rings 7 are evenly spaced and installed on the outer surface of the water-blocking layer 3. The fiber is wrapped with a phosphated steel wire wrapping layer 2, and each water-blocking ring 7 has a water-swellable rubber 10 embedded in its outer ring. The phosphated steel wire wrapping layer 2 is in contact with the inner side of the outer sheath 1, and the outer sheath 1 is extruded on the outer surface of the phosphated steel wire wrapping layer 2. The fiber paste 6 plays a role in protecting, reducing reflection loss, compensating for misalignment, and protecting the fiber core surface during the fiber connection process. It is an important material to ensure the stability of fiber connection quality and the reliability of signal transmission, so as to ensure the best connection performance and effect.

[0024] In one embodiment, the water-blocking ring 7 is composed of a left half-ring 8 and a right half-ring 9. The outer rings of both the left half-ring 8 and the right half-ring 9 have arc-shaped grooves corresponding to the water-swellable rubber 10. The end face of the left half-ring 8 is integrally formed with a locking block 11, and the end face of the right half-ring 9 is provided with a locking groove 12 corresponding to the locking block 11. The locking block 11 and the locking groove 12 are engaged with each other. With this structure, it is easy to assemble the water-blocking ring 7 while the water-blocking layer 3 is wound and installed.

[0025] In one embodiment, the material of the water-blocking layer 3 is a rubber water-blocking tape, and the thickness of the water-blocking layer 3 made of rubber water-blocking tape is 0.5mm-2.0mm. With this structure, the water-blocking layer 3 can absorb impact energy by utilizing the elasticity of the material while satisfying waterproofing, and further resist compression and bending stress.

[0026] In one embodiment, one end of the card block 11 is provided with an arc-shaped protrusion, and the inner side of the card slot 12 is provided with a connecting groove with a sloping surface corresponding to the arc-shaped protrusion. With this structure, it is easy to engage the card block 11 and the card slot 12.

[0027] In one embodiment, the outer sheath 1 is made of HDPE or polyethylene, and the outer surface of the loose sleeve 4 is wrapped with a foam plastic pressure-resistant layer. With this structure, the outer sheath 1 made of HDPE or polyethylene forms a radial waterproof barrier. The foam plastic pressure-resistant layer can buffer external pressure and reduce deformation caused by its own weight.

[0028] In one embodiment, the water-blocking ring 7 is made of polyethylene or silicone, and CFR-1633 flame-retardant cotton is filled between two adjacent water-blocking rings 7. This structure allows the water-blocking ring 7 to have both waterproof and flame-retardant effects.

[0029] Working principle:

[0030] In use, the phosphated steel wire wrapping layer 2 provides longitudinal tension support and disperses external radial pressure, reducing the risk of optical cable deformation under pressure. The rubber water-blocking tape type water-blocking layer 3 can absorb impact energy using material elasticity, further resisting compression and bending stress. The fiber paste 6 filled inside the loose tube 4, the water-blocking layer 3 wrapped around the outer surface of the loose tube 4, and the water-blocking rings 7 evenly spaced on the outer surface of the water-blocking layer 3 form a multi-layer waterproof structure. The fiber paste 6 can prevent water from spreading along the length of the optical beam. The water-blocking layer 3 and the water-blocking rings 7 prevent water from penetrating into the loose tube 4. The water-swellable rubber 10 embedded in the outer ring of the water-blocking rings 7 can quickly seal the seepage path, achieving longitudinal and radial waterproofing of the cable and significantly improving the cable's compressive and waterproof performance.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A central tube type pressure-resistant and waterproof cable, comprising an outer sheath (1), a phosphated steel wire wrapping layer (2), a water-blocking layer (3), a loose tube (4), and a light beam, characterized in that: The outer sheath (1) is provided with a loose tube (4) inside, and an optical fiber bundle (5) is inserted inside the loose tube (4). The gap between the loose tube (4) and the optical fiber bundle (5) is filled with fiber grease (6). A water-blocking layer (3) is wrapped around the outer surface of the loose tube (4). Several water-blocking rings (7) are evenly spaced on the outer surface of the water-blocking layer (3). A phosphated steel wire wrapping layer (2) is wrapped around the outside of the several water-blocking rings (7). A water-swellable rubber (10) is embedded in the outer ring of each water-blocking ring (7). The phosphated steel wire wrapping layer (2) is in contact with the inner side of the outer sheath (1), and the outer sheath (1) is extruded on the outer surface of the phosphated steel wire wrapping layer (2).

2. The central tube type pressure-resistant and waterproof cable according to claim 1, characterized in that: The water-blocking ring (7) is composed of a left half ring (8) and a right half ring (9). The outer rings of the left half ring (8) and the right half ring (9) are provided with arc-shaped grooves corresponding to the water-swellable rubber (10). The end face of the left half ring (8) is integrally formed with a locking block (11), and the end face of the right half ring (9) is provided with a locking groove (12) corresponding to the locking block (11). The locking block (11) and the locking groove (12) are engaged with each other.

3. The central tube type pressure-resistant and waterproof cable according to claim 1, characterized in that: The material of the water-blocking layer (3) is rubber water-blocking tape, and the thickness of the water-blocking layer (3) made of rubber water-blocking tape is 0.5mm-2.0mm.

4. The central tube type pressure-resistant and waterproof cable according to claim 2, characterized in that: One end of the card block (11) is provided with an arc-shaped protrusion, and the inner side of the card slot (12) is provided with a connecting groove with a sloping surface corresponding to the arc-shaped protrusion.

5. The central tube type pressure-resistant and waterproof cable according to claim 1, characterized in that: The outer sheath (1) is made of HDPE or polyethylene, and the outer surface of the loose sleeve (4) is wrapped with a foam plastic anti-compression layer.

6. The central tube type pressure-resistant and waterproof cable according to claim 1, characterized in that: The water-blocking ring (7) is made of polyethylene or silicone, and CFR-1633 flame-retardant cotton is filled between two adjacent water-blocking rings (7).

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