Dry-type tight-buffered circular optical cable

Abstract

The utility model belongs to the technical field of optical cables, and particularly discloses a dry type tight tube circular optical cable, which comprises an optical fiber and a tight tube, the tight tube is wrapped outside the optical fiber, water blocking yarn is wrapped outside the tight tube, a PBT (polybutylene terephthalate) sleeve is wrapped outside the water blocking yarn, a blended layer is wrapped outside the PBT sleeve, a shielding layer is wrapped outside the blended layer, and the shielding layer is wrapped outside the shielding layer. And the outer side of the shielding layer is wrapped with a rubber sleeve. According to the dry type tight tube circular optical cable, the tight tube wraps the outer side of the optical fiber, the circular optical cable adopts the blending layer composed of the aramid fiber and the glass fiber yarn as the reinforcing piece, the aramid fiber has excellent mechanical and physical properties and chemical properties and is light in weight, good in insulating property, high in elasticity modulus and high in strength, the aramid fiber evenly wraps the periphery of the optical fiber, and therefore the optical fiber is not prone to falling off. Compared with a common butterfly cable, the optical cable can bear higher tensile force, the tensile performance of the optical cable can be enhanced, and the problem that the structural strength of the optical cable is poor is solved.

Description

Technical Field

[0001] This utility model relates to the field of optical cable technology, specifically a dry-type tight-buffered circular optical cable. Background Technology

[0002] The interior of an optical cable consists of multiple optical fibers that serve as the transmission medium for communication. To prevent damage to the optical cable, it is mostly wrapped in a rubber sheath and tube. Since it is not made of precious metals, it has no recycling value. In addition, to prevent the optical cable from getting wet, it is also filled with an insulation layer, a waterproof layer, and various fiber materials.

[0003] However, the internal structure of such optical cables in the past was simple, and the connection strength between the layers was lacking. This made them prone to separation during the bending and laying of the optical cables. Their tensile strength was poor, and they required multiple processing and manufacturing processes, which did not improve production efficiency.

[0004] Now, a novel dry-type tight-buffered circular optical cable is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a dry-type tight-buffered circular optical cable to solve the problem of poor structural strength of optical cables mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dry-type tight-buffered circular optical cable, comprising an optical fiber and a tight-buffered sleeve, wherein the outer side of the optical fiber is wrapped with the tight-buffered sleeve, and the outer side of the tight-buffered sleeve is wrapped with water-blocking yarn, the outer side of the water-blocking yarn is wrapped with a PBT sheath, and the outer side of the PBT sheath is wrapped with a blended layer, the outer side of the blended layer is wrapped with a shielding layer, and the outer side of the shielding layer is wrapped with a rubber sheath, the outer side of the rubber sheath is wrapped with a thick rubber sheath, and the surface of the thick rubber sheath is wrapped with an outer sheath, wherein a hidden groove is provided at the lower right corner between the blended layer and the shielding layer, and a tear cord is fixedly connected in the hidden groove.

[0007] Preferably, the optical fiber, tight sleeve, water-blocking yarn, PBT sleeve, and blended layer are arranged in concentric circles, and the blended layer is composed of eleven strands of aramid yarn and six strands of water-blocking glass fiber yarn.

[0008] Preferably, the tear cord can separate the shielding layer, the rubber sleeve, the thick rubber sleeve, and the outer sheath.

[0009] Preferably, a cylindrical groove is provided between the front and rear sides inside the rubber sleeve, and the cylindrical groove is filled with magnesium oxide powder. A slot is provided around the outer surface of the rubber sleeve, and a locking block is fixed around the inner wall of the thick rubber sleeve.

[0010] Preferably, the card block is embedded in the card slot, and the shape of the thick rubber sleeve matches the card slot.

[0011] Preferably, the cylindrical grooves are arranged at equal intervals in the rubber sleeve, and the slots are disposed between adjacent cylindrical grooves.

[0012] Preferably, a connecting strip is fixed at the bottom center of the thick rubber sleeve, and two segments are fixed on both sides of the connecting strip. A layer of adhesive is provided at the bottom of the segments, and release paper is pasted on the surface of the adhesive layer. An adhesive layer is provided between the thick rubber sleeve and the outer sheath, and grooves are provided on both sides between the adhesive layer and the outer sheath. The surface of the outer sheath is distributed with raised particles.

[0013] Preferably, the segmented piece is embedded in the groove, and the segmented piece can be bent to a horizontal position.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the dry-type tight-buffered circular optical cable not only improves the structural strength of the optical cable and enhances its waterproof and fireproof capabilities, but also facilitates assembly and fixing;

[0015] (1) By wrapping the outer side of the optical fiber with a tight sheath, this circular optical cable uses a blended layer composed of aramid fiber and glass fiber yarn as a reinforcing element. Aramid fiber possesses excellent mechanical, physical, and chemical properties, is lightweight, has good insulation performance, high elastic modulus, and high strength. The aramid fiber is evenly wrapped around the optical fiber, allowing it to withstand higher tensile forces compared to ordinary butterfly cables, thus enhancing the tensile strength of the optical cable. This product directly coats single-mode or multimode optical fibers with a high-bonding-strength tight sheath material to form the optical fiber. A tear rope is added between the reinforcing element and the outer sheath, and a PVC outer sheath or LSZH sheath is extruded onto the surface of the optical cable. Technically, precise process control can fully meet production requirements, and the first-pass yield rate can reach over 99%.

[0016] Indoor cabling at the user end is a relatively complex process with many factors to consider. It is necessary to ensure the safety of the line while also taking into account the convenience of construction. Circular drop cables and butterfly drop cables have significant differences in structure and manufacturing process, mainly in the shape, form, placement of reinforcing components, and production process. Circular drop cables have a tight-buffered fiber with a loose structure between the fiber and the tight-buffer. The reinforcing components are loose glass fiber yarn, evenly placed around the optical unit. Therefore, circular cables can be designed to have higher tensile strength to overcome the defects of butterfly cables.

[0017] (2) By filling the cylindrical groove with magnesium oxide powder, the cylindrical groove inside the rubber sleeve is filled with magnesium oxide powder, which is evenly distributed around the inside of the rubber sleeve to support the entire structure and also prevents the magnesium oxide powder from being ejected when it breaks to retard and extinguish the fire. The thick rubber sleeve and the rubber sleeve are connected by the clip and the slot, which can prevent the external materials from separating. It works with the glass fiber yarn in the blended layer and each rubber material to make it waterproof and flame retardant.

[0018] (3) By distributing protrusions on the surface of the outer sheath, the evenly distributed protrusions can increase the friction and fit between the outer sheath of the optical cable and the surrounding components during installation. Tear off the segment pieces from the clips on both sides and remove the release paper pasted on the surface. Concave the exposed adhesive layer segment pieces into horizontal or different states for pasting, so as to avoid the optical cable shaking during assembly. When not in use, the segment pieces can be left to adhere to the outside of the adhesive layer. Attached Figure Description

[0019] Figure 1 This is a frontal cross-sectional view of the present invention.

[0020] Figure 2 This is a side view of the structure of this utility model;

[0021] Figure 3 For the present utility model Figure 1 Enlarged cross-sectional view of a portion of point A in the middle section;

[0022] Figure 4 This is a front view cross-sectional structural diagram of the outer sheath of this utility model.

[0023] In the diagram: 1. Optical fiber; 2. Tight sleeve; 3. Water-blocking yarn; 4. PBT sleeve; 5. Blended layer; 6. Shielding layer; 7. Rubber sleeve; 8. Magnesium oxide powder; 9. Cylindrical groove; 10. Locking block; 11. Adhesive layer; 12. Split piece; 13. Release paper; 14. Connecting strip; 15. Thick rubber sleeve; 16. Adhesive layer; 17. Groove; 18. Protrusion; 19. Outer sheath; 20. Hidden groove; 21. Tear cord; 22. Locking slot. Detailed Implementation

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1: Please refer to Figure 1-4A dry-type tight-buffered circular optical cable includes an optical fiber 1 and a tight-buffer 2. The outer side of the optical fiber 1 is wrapped with the tight-buffer 2, and the outer side of the tight-buffer 2 is wrapped with water-blocking yarn 3. The outer side of the water-blocking yarn 3 is wrapped with a PBT sleeve 4, and the outer side of the PBT sleeve 4 is wrapped with a blended layer 5. The outer side of the blended layer 5 is wrapped with a shielding layer 6, and the outer side of the shielding layer 6 is wrapped with a rubber sleeve 7. The outer side of the rubber sleeve 7 is wrapped with a thick rubber sleeve 15, and the surface of the thick rubber sleeve 15 is wrapped with an outer sheath 19. A hidden groove 20 is provided at the lower right corner between the blended layer 5 and the shielding layer 6, and a tear rope 21 is fixedly connected in the hidden groove 20.

[0026] The optical fiber 1, tight sleeve 2, water-blocking yarn 3, PBT sleeve 4 and blended layer 5 are arranged in concentric circles. The blended layer 5 is composed of eleven strands of aramid yarn and six strands of water-blocking glass fiber yarn. The tear rope 21 can separate the shielding layer 6, rubber sleeve 7, thick rubber sleeve 15 and outer sheath 19.

[0027] Specifically, such as Figure 1 and Figure 3 As shown, this circular optical cable uses a blended layer 5 composed of aramid fiber and glass fiber yarn as a reinforcing element. Aramid fiber possesses superior mechanical, physical, and chemical properties, is lightweight, has excellent insulation performance, high elastic modulus, and high strength. The aramid fiber is uniformly wrapped around the optical fiber 1, allowing it to withstand higher tensile forces compared to ordinary butterfly cables, thus enhancing the cable's tensile strength. This product uses a high-bonding-strength tight-buffered material 2 directly covering the single-mode or multimode optical fiber 1 to form the optical fiber 1. A tear cord 21 is added between the reinforcing element and the outer sheath 19, and a PVC outer sheath 19 or LSZH sheath is extruded onto the cable surface. Technically, precise process control can fully meet production requirements, achieving a first-pass yield rate of over 99%.

[0028] Indoor cabling at the user end is a relatively complex process, involving many factors. It is necessary to ensure the safety of the line while also taking into account the convenience of construction. Circular drop cables and butterfly drop cables have significant differences in structure and manufacturing process, mainly in the cable shape, form, placement of reinforcing components, and production process. In a circular drop cable, the optical fiber 1 is fitted with a tight sleeve 2, and the structure between the optical fiber 1 and the tight sleeve 2 is loose. The reinforcing components are loose glass fiber yarn, evenly placed around the optical unit. Therefore, circular cables can be designed to have higher tensile strength to overcome the defects of butterfly cables.

[0029] Example 2: A cylindrical groove 9 is provided between the front and back of the inside of the rubber sleeve 7, and the cylindrical groove 9 is filled with magnesium oxide powder 8. A slot 22 is provided around the outer surface of the rubber sleeve 7, and a locking block 10 is fixed around the inner wall of the thick rubber sleeve 15.

[0030] The card block 10 is embedded in the card slot 22, the shape of the thick rubber sleeve 15 matches the card slot 22, the cylindrical grooves 9 are arranged at equal intervals in the rubber sleeve 7, and the card slot 22 is set between adjacent cylindrical grooves 9.

[0031] Specifically, such as Figure 1 and Figure 3 As shown, the cylindrical groove 9 inside the rubber sleeve 7 is filled with magnesium oxide powder 8, which is evenly distributed around the inside of the rubber sleeve 7 to support the entire structure and also prevent the magnesium oxide powder 8 from being ejected in the event of a breakage, thus preventing it from retardant and extinguishing the fire. The thick rubber sleeve 15 and the rubber sleeve 7 are connected by the locking block 10 and the locking groove 22 to prevent external materials from separating.

[0032] Example 3: A connecting strip 14 is fixed at the bottom center of the thick rubber sleeve 15, and a split piece 12 is fixed on both sides of the connecting strip 14. A layer of adhesive 16 is provided at the bottom of the split piece 12, and release paper 13 is pasted on the surface of the adhesive layer 16. An adhesive layer 11 is provided between the thick rubber sleeve 15 and the outer sheath 19, and grooves 17 are provided on both sides between the adhesive layer 11 and the outer sheath 19. Protrusions 18 are distributed on the surface of the outer sheath 19. The split piece 12 is embedded in the groove 17 and can be bent to a horizontal state.

[0033] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the evenly distributed protrusions 18 can increase the friction and fit between the outer sheath 19 on the surface of the optical cable and the surrounding components during installation. The segmented pieces 12 are torn off from the clips 10 on both sides and the release paper 13 on the surface is removed. The segmented pieces 12 with exposed adhesive layer 16 are recessed into a horizontal or different state for pasting, so as to prevent the optical cable from shaking during assembly.

[0034] Working Principle: In use, this circular optical cable first employs a blended layer 5 composed of aramid fiber and glass fiber yarn as a reinforcing element. Aramid fiber possesses superior mechanical, physical, and chemical properties, is lightweight, has excellent insulation, high elastic modulus, and high strength. The aramid fiber is evenly wrapped around the optical fiber 1, allowing it to withstand higher tensile forces compared to ordinary butterfly cables, thus enhancing the cable's tensile strength. This product directly coats the single-mode or multi-mode optical fiber 1 with a high-bonding-strength tight-fitting sheath 2 to form the optical fiber 1. A tear rope 21 is added between the reinforcing element and the outer sheath 19, and a PVC outer sheath 19 or LSZH sheath is extruded onto the cable surface. Technically, precise process control fully meets production requirements, achieving a first-pass yield rate of over 99%. Indoor cabling at the user end is a complex process, requiring consideration of many factors, including line safety and ease of construction. Circular drop cables and butterfly drop cables differ significantly in structure and manufacturing process, primarily in the outer sheath... In terms of structure, shape, placement of reinforcing components, and manufacturing process, the circular optical cable has an optical fiber 1 with a tight sleeve 2, and the structure between the optical fiber 1 and the tight sleeve 2 is loose. The reinforcing components are loose glass fiber yarn, evenly placed around the optical unit. Therefore, the circular optical cable can be designed as an optical cable with higher tensile strength to overcome the defects of the butterfly-shaped optical cable. The cylindrical groove 9 inside the rubber sleeve 7 is filled with magnesium oxide powder 8, which is evenly distributed around the inside of the rubber sleeve 7 to support the entire structure and also to prevent the ejection of oxide in the event of a breakage. Magnesium powder 8 is flame-retardant and fire-extinguishing, while the thick rubber sleeve 15 and the rubber sleeve 7 are connected by the locking block 10 and the locking groove 22 to prevent the external materials from separating. It works with the glass fiber yarn in the blended layer 5 and various rubber materials to make it waterproof and flame-retardant. The evenly distributed protrusions 18 can increase the friction and fit between the outer sheath 19 on the surface of the optical cable and the surrounding components during installation. Tear off the split pieces 12 from the locking blocks 10 on both sides and remove the release paper 13 pasted on the surface. The split pieces 12 exposed by the adhesive layer 16 are concave into horizontal or different states for pasting.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A dry-type tight-buffered circular optical cable, comprising an optical fiber (1) and a tight-buffered cable (2), characterized in that: The outer side of the optical fiber (1) is wrapped with a tight sleeve (2), and the outer side of the tight sleeve (2) is wrapped with a water-blocking yarn (3). The outer side of the water-blocking yarn (3) is wrapped with a PBT sleeve (4), and the outer side of the PBT sleeve (4) is wrapped with a blended layer (5). The outer side of the blended layer (5) is wrapped with a shielding layer (6), and the outer side of the shielding layer (6) is wrapped with a rubber sleeve (7). The outer side of the rubber sleeve (7) is wrapped with a thick rubber sleeve (15), and the surface of the thick rubber sleeve (15) is wrapped with an outer sheath (19). A hidden groove (20) is provided at the lower right corner between the blended layer (5) and the shielding layer (6), and a tear rope (21) is fixedly connected in the hidden groove (20).

2. The dry-type tight-buffered circular optical cable according to claim 1, characterized in that: The optical fiber (1), tight sleeve (2), water-blocking yarn (3), PBT sleeve (4) and blended layer (5) are arranged in concentric circles. The blended layer (5) is composed of eleven strands of aramid yarn and six strands of water-blocking glass fiber yarn.

3. A dry-type tight-buffered circular optical cable according to claim 1, characterized in that: The tear cord (21) can separate the shielding layer (6), the rubber sleeve (7), the thick rubber sleeve (15), and the outer sheath (19).

4. A dry-type tight-buffered circular optical cable according to claim 1, characterized in that: A cylindrical groove (9) is provided between the front and back of the inside of the rubber sleeve (7), and the cylindrical groove (9) is filled with magnesium oxide powder (8). A slot (22) is provided around the outer surface of the rubber sleeve (7), and a locking block (10) is fixed around the inner wall of the thick rubber sleeve (15).

5. A dry-type tight-buffered circular optical cable according to claim 4, characterized in that: The card block (10) is embedded in the card slot (22), and the shape of the thick rubber sleeve (15) matches the card slot (22).

6. A dry-type tight-buffered circular optical cable according to claim 4, characterized in that: The cylindrical grooves (9) are arranged at equal intervals in the rubber sleeve (7), and the slots (22) are arranged between adjacent cylindrical grooves (9).

7. A dry-type tight-buffered circular optical cable according to claim 1, characterized in that: A connecting strip (14) is fixed at the bottom center of the thick rubber sleeve (15), and a split piece (12) is fixed on both sides of the connecting strip (14). A layer of adhesive (16) is provided at the bottom of the split piece (12), and release paper (13) is pasted on the surface of the adhesive layer (16). An adhesive layer (11) is provided between the thick rubber sleeve (15) and the outer sheath (19), and grooves (17) are provided on both sides between the adhesive layer (11) and the outer sheath (19). The surface of the outer sheath (19) is distributed with protrusions (18).

8. A dry-type tight-buffered circular optical cable according to claim 7, characterized in that: The segmented piece (12) is embedded in the groove (17), and the segmented piece (12) can be bent to a horizontal state.

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