A square anti-lateral pressure center gas-blowing optical cable

Abstract

The present application relates to a kind of four square lateral pressure resistance center gas blowing optical cable, including special sheath, optical unit, high-strength special optical fiber, low friction coefficient sheath, upper aramid fiber reinforced core and lower aramid fiber reinforced core, special sheath includes intermediate circular body and left upper support leg, left lower support leg, right upper support leg, right lower support leg on intermediate circular body, four support legs are symmetrically distributed and all outwardly extend, the upper and lower parts of special sheath are provided with upper aramid fiber reinforced core and lower aramid fiber reinforced core respectively, upper aramid fiber reinforced core and lower aramid fiber reinforced core are symmetrically distributed, optical unit is arranged in the central position of special sheath, a plurality of high-strength special optical fibers are arranged in optical unit, and low friction coefficient sheath is arranged outside optical unit;Compared with prior art, the optical cable tensile strength and lateral pressure resistance performance are high, and the optical cable center can be gas blowing optical unit, while having very high flame retardant and easy stripping performance.

Description

[Technical Field]

[0001] This invention relates to the field of optical fiber and cable technology, specifically to a four-sided lateral pressure resistant center air-blown optical cable. [Background Technology]

[0002] With the advent of the 5G era and the application of new equipment, the demand for irregularly shaped optical cables is increasing. For different usage scenarios and conditions, these cables must not only meet the requirements of high lateral pressure resistance, but also be easy to strip and allow for air-blown installation of the necessary optical units. It is important to note that the optical cable itself must possess high tensile and lateral pressure resistance, as well as high flame retardancy to withstand a wide range of temperature variations. In applications involving device interconnection, conventional optical cable structures are no longer sufficient. Therefore, designing a novel optical cable structure that meets these requirements will be of great importance. [Summary of the Invention]

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a four-sided anti-lateral pressure center air-blown optical cable. This optical cable has high tensile strength and anti-lateral pressure performance, and the optical unit can be laid by air blowing in the center of the optical cable. At the same time, it has high flame retardancy and easy stripping performance, which can meet the current user needs.

[0004] To achieve the above objectives, a four-sided lateral pressure resistant center air-blown optical cable is designed, comprising a shaped sheath 1, an optical unit 2, a high-strength special optical fiber 3, a low-friction coefficient sheath 4, an upper aramid fiber reinforcing core 5, and a lower aramid fiber reinforcing core 6. The shaped sheath 1 includes a central circular main body and upper left, lower left, upper right, and lower right support feet 101, 102, 103, and 104 located on the upper left, lower left, upper right, and lower right sides of the central circular main body, respectively. Support feet 102, upper right support feet 103, and lower right support feet 104 are symmetrically distributed and all extend outward. The upper and lower parts of the irregular sheath 1 are respectively provided with an upper aramid fiber reinforcing core 5 and a lower aramid fiber reinforcing core 6. The upper aramid fiber reinforcing core 5 and the lower aramid fiber reinforcing core 6 are symmetrically distributed vertically. An optical unit 2 is provided at the center of the irregular sheath 1. Several high-strength special optical fibers 3 are provided inside the optical unit 2. A low friction coefficient sheath 4 is provided outside the optical unit 2.

[0005] Furthermore, the upper left support foot 101 and the lower left support foot 102, as well as the upper right support foot 103 and the lower right support foot 104, are symmetrically distributed vertically, and the upper left support foot 101 and the upper right support foot 103, as well as the lower left support foot 102 and the lower right support foot 104, are symmetrically distributed horizontally. This allows for effective deformation in response to lateral pressure applied in the four directions (up, down, left, and right), reducing the lateral pressure on the central circular body and thus alleviating lateral pressure and improving the mechanical performance of the optical unit.

[0006] Furthermore, the high-strength special optical fiber 3 is a 200μm high-strength tensile and bending resistant special optical fiber, which is a small-size high-strength special optical cable. It is not only small in size, but also has excellent tensile and bending resistance, laying the foundation for the high-strength optical signal transmission and size structure design of the central optical unit.

[0007] Furthermore, the upper aramid fiber reinforcing core 5 and the lower aramid fiber reinforcing core 6 are embedded in the irregular sheath 1 in a sinusoidal curve pattern along the optical cable axis. This design not only improves the tensile strength of the entire optical cable, but also allows the upper and lower aramid fiber reinforcing cores to be used as cable opening tools. Since the aramid fiber reinforcing cores are distributed in a sinusoidal curve pattern, pulling the reinforcing cores can separate the irregular sheath into two parts, avoiding the need to use a stripping tool to strip the irregular sheath.

[0008] Furthermore, the peaks and troughs of the sine curve are precisely at the outermost ends of the upper aramid fiber reinforced core 5 and the lower aramid fiber reinforced core 6, which are made of high-strength aramid polymer fiber material.

[0009] Furthermore, the upper aramid fiber reinforcing core 5 and the lower aramid fiber reinforcing core 6 are distributed radially from the outer surface of the central circular body to the low friction coefficient sheath 4, which further allows the upper and lower aramid fiber reinforcing cores to be used as cable opening tools.

[0010] Furthermore, the low-friction coefficient sheath 4 is fitted onto the outside of the optical unit 2. The surface of the low-friction coefficient sheath 4 is distributed with several irregular low-friction glass protrusions. The low-friction coefficient sheath 4 forms an octagon. When high-intensity laying air passes through the glass protrusions, the irregular distribution of the glass protrusions can effectively form a barrier, thereby creating stronger air resistance than ordinary surfaces and generating stronger air-blowing laying power. In addition, the eight vertices of the octagonal contact and the irregular glass protrusions form an ultra-low surface friction coefficient. The same laying power can achieve a longer laying distance. Therefore, conventional air-blowing laying intensity can achieve an ultra-long laying length.

[0011] Furthermore, the irregularly shaped sheath 1 is made of a high-hardness thermoplastic polyolefin elastomer material, which gives the entire cable high flame retardant performance and meets the CPR-B level flame retardant requirements.

[0012] Furthermore, the overall outer diameter of the irregularly shaped sheath 1 is 6.0 mm, and the width of the support foot of the irregularly shaped sheath 1 is 0.8-1.2 mm, preferably 1.0 mm.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] (1) This invention uses 200μm high-strength special optical fiber, which is a small-sized high-strength special optical cable. It is not only small in size, but also has excellent tensile and bending resistance, laying the foundation for high-strength optical signal transmission and size structure design of the central optical unit.

[0015] (2) The present invention is provided with a specially distributed upper aramid fiber reinforcing core and a lower aramid fiber reinforcing core, and is made of high-strength aramid polymer fiber. This design can not only improve the tensile strength of the entire optical cable, but also use the upper and lower aramid fiber reinforcing cores as a cable opening tool. Since the upper and lower aramid fiber reinforcing cores are distributed in a sinusoidal curve, the irregular sheath can be divided into two parts by pulling the reinforcing core, thus avoiding the need to use a stripping tool to strip the irregular sheath.

[0016] (3) The central light unit of the present invention is octagonal and the sheath surface is distributed with irregular low-friction glass protrusions. Therefore, when high-intensity laying air passes through the glass protrusions, the irregular distribution of the glass protrusions can form a good blockage, thereby forming a stronger wind resistance than ordinary surfaces and generating stronger air-blowing laying power. In addition, the eight vertices of the octagonal contact and the irregular glass protrusions form an ultra-low surface friction coefficient. The same laying power can achieve a longer laying distance. Therefore, the conventional air-blowing laying intensity can achieve an ultra-long laying length.

[0017] (4) The irregular sheath of the present invention includes a central circular main body and four supporting feet. These four supporting feet extend outward, so they can deform well in response to the lateral pressure applied in the four directions of up, down, left and right, thereby reducing the lateral pressure on the central circular main body and achieving the effect of relieving lateral pressure, thus improving the mechanical performance of the optical unit; in addition, due to the support of the four supporting feet, the contact area between this optical cable and the ground or object is small, which can effectively realize dragging for construction.

[0018] (5) The irregular sheath of the present invention is composed of high-hardness thermoplastic polyolefin elastomer material, which makes the whole cable have high flame retardant performance and meet the CPR-B level flame retardant requirements.

[0019] In summary, the optical cable of this invention has high tensile strength and lateral pressure resistance, and the optical unit can be laid in the center of the optical cable by air blowing. It also has high flame retardancy and easy stripping performance, and is worthy of widespread application. [Image Description]

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 2 This is a top view of the structure of the present invention;

[0022] In the diagram: 1. Abnormal sheath 101, upper left support foot 102, lower left support foot 103, upper right support foot 104, lower right support foot 104; 2. Optical unit; 3. High-strength special optical fiber; 4. Low friction coefficient sheath; 5. Upper aramid fiber reinforced core; 6. Lower aramid fiber reinforced core. [Detailed Implementation]

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] As attached Figure 1 and attached Figure 2 As shown, this invention provides a four-sided lateral pressure resistant center air-blown optical cable, including a shaped sheath 1, an upper left support leg 101, a lower left support leg 102, an upper right support leg 103, and a lower right support leg 104, an optical unit 2, a high-strength special optical fiber 3, a low friction coefficient sheath 4, an upper aramid fiber reinforcing core 5, and a lower aramid fiber reinforcing core 6; the shaped sheath 1 includes a central circular main body and four support legs, which are symmetrically distributed at the upper left, lower left, upper right, and lower right positions of the central circular main body: upper left support leg 101, lower left support leg 102, upper right support leg 103, and lower right support leg 104. All of them extend outwards. Specifically, the upper left support leg 101 and the lower left support leg 102 are symmetrically distributed vertically, the upper left support leg 101 and the upper right support leg 103 are symmetrically distributed horizontally, the upper right support leg 103 and the lower right support leg 104 are symmetrically distributed vertically, and the lower right support leg 104 and the lower left support leg 102 are symmetrically distributed horizontally. In addition, the upper and lower parts of the irregular sheath 1 are respectively provided with an upper aramid fiber reinforcing core 5 and a lower aramid fiber reinforcing core 6, which are symmetrically distributed vertically. An optical unit 2 is provided at the center of the irregular sheath 1. Several high-strength special optical fibers 3 are provided inside the optical unit 2, and a low friction coefficient sheath 4 is provided outside the optical unit 2.

[0025] Among them, the high-strength special optical fiber 3 is a 200μm high-strength tensile and bending resistant special optical fiber. The upper aramid fiber reinforcing core 5 and the lower aramid fiber reinforcing core 6 are embedded in the irregular sheath 1 in a sinusoidal curve pattern along the optical cable axis; the peaks and troughs of the sinusoidal curve are exactly the outermost ends of the upper aramid fiber reinforcing core 5 and the lower aramid fiber reinforcing core 6. The upper aramid fiber reinforcing core 5 and the lower aramid fiber reinforcing core 6 are made of high-strength aramid polymer fiber material; and the upper aramid fiber reinforcing core 5 and the lower aramid fiber reinforcing core 6 are distributed radially from the outer surface of the central circular main body to the low friction coefficient sheath 4. The low friction coefficient sheath 4 is fitted outside the optical unit 2. The low friction coefficient sheath 4 not only has low frictional resistance, but also has several irregular low friction glass protrusions distributed on its surface, forming an octagonal shape on the outside of the low friction coefficient sheath 4. The irregularly shaped sheath 1 is made of high-hardness thermoplastic polyolefin elastomer material. The overall outer diameter of the irregularly shaped sheath 1 is 6.0 mm, and the width of the support foot of the irregularly shaped sheath 1 is 0.8-1.2 mm, preferably 1.0 mm.

[0026] In this invention, the 200μm high-strength special optical fiber is a small-sized high-strength special optical fiber with excellent tensile and bending resistance. The optical cable is equipped with a specially distributed upper aramid fiber reinforcing core and a lower aramid fiber reinforcing core, which are made of high-strength aramid polymer fiber. The upper and lower aramid fiber reinforcing cores are embedded in the irregular sheath in a sinusoidal curve pattern along the axial direction. The peaks and troughs of the sinusoidal curve are exactly at the outermost ends of the upper and lower aramid fiber reinforcing cores. This not only improves the tensile strength of the entire optical cable, but also allows the upper and lower aramid fiber reinforcing cores to be used as a cable opening tool. Since the aramid fiber reinforcing cores are distributed in a sinusoidal curve pattern, pulling the reinforcing cores can separate the irregular sheath into two parts, avoiding the need to use a stripping tool to open the irregular sheath.

[0027] The central optical unit is octagonal, and the sheath surface is covered with irregularly distributed low-friction glass bumps. When high-intensity laying air passes through these bumps, their irregular distribution effectively creates obstruction, resulting in stronger air resistance and greater air-blowing laying power compared to ordinary surfaces. Furthermore, the eight vertices of the octagonal contact, combined with the irregular glass bumps, create an ultra-low surface friction coefficient, allowing for longer laying distances with the same laying power. Therefore, conventional air-blowing laying intensity can achieve ultra-long-distance laying. The irregularly shaped sheath of the optical cable includes a central circular body and four supporting legs. These four supporting legs extend outwards, effectively deforming against lateral pressure applied in four directions (up, down, left, and right), thus reducing lateral pressure on the central circular body and improving the mechanical performance of the optical unit. Additionally, due to the support of the four legs, the optical cable has a small contact area with the ground or objects, allowing for effective dragging during construction. The irregularly shaped sheath is made of high-hardness thermoplastic polyolefin elastomer material, which gives the entire cable high flame retardant performance and meets the CPR-B level flame retardant requirements; the overall outer diameter of the optical cable is 6.0mm, and the width of the optical cable support feet is about 1.0mm.

[0028] This invention is not limited to the above-described embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this invention shall be considered equivalent substitutions and shall be included within the scope of protection of this invention.

Claims

1. A quad lateral pressure neutral gas-blown optical cable characterized by: The device includes a shaped sheath (1), an optical unit (2), a high-strength special optical fiber (3), a low-friction coefficient sheath (4), an upper aramid fiber reinforcing core (5), and a lower aramid fiber reinforcing core (6). The shaped sheath (1) includes a central circular body and upper left (101), lower left (102), upper right (103), and lower right (104) support feet located on the upper left, lower left, upper right, and lower right sides of the central circular body. The upper left (101), lower left (102), upper right (103), and lower right (104) support feet are symmetrically distributed and all extend outward. The upper and lower parts of the shaped sheath (1) are respectively provided with an upper aramid fiber reinforcing core (5) and a lower aramid fiber reinforcing core (6). The upper aramid fiber reinforcing core (5) and the lower aramid fiber reinforcing core (6) are symmetrically distributed vertically. An optical unit (2) is provided at the center of the shaped sheath (1). The optical unit (2) contains... The optical unit (2) is provided with several high-strength special optical fibers (3), and the optical unit (2) is provided with a low friction coefficient sheath (4); the upper aramid fiber reinforcing core (5) and the lower aramid fiber reinforcing core (6) are embedded in the irregular sheath (1) in a sinusoidal curve pattern along the optical cable axis; the peak and trough of the sinusoidal curve are exactly the outermost ends of the upper aramid fiber reinforcing core (5) and the lower aramid fiber reinforcing core (6), and the upper aramid fiber reinforcing core (5) and the lower aramid fiber reinforcing core (6) are made of high-strength aramid polymer fiber material; the upper aramid fiber reinforcing core (5) and the lower aramid fiber reinforcing core (6) are distributed from the outer surface of the middle circular body to the low friction coefficient sheath (4) in the radial direction of the optical cable; the low friction coefficient sheath (4) is sleeved on the outside of the optical unit (2), and the surface of the low friction coefficient sheath (4) is distributed with several irregular low friction glass protrusions, and the low friction coefficient sheath (4) forms an octagon.

2. The quad lateral pressure neutral center gas-blown optical cable of claim 1, wherein: The upper left support foot (101) and the lower left support foot (102), as well as the upper right support foot (103) and the lower right support foot (104), are symmetrically distributed vertically, and the upper left support foot (101) and the upper right support foot (103), as well as the lower left support foot (102) and the lower right support foot (104), are symmetrically distributed horizontally.

3. The quadro center gas-filled optical cable of claim 1, wherein: The high-strength special optical fiber (3) is a high-strength tensile and bending resistant special optical fiber with a size of 200μm.

4. The quad lateral pressure core gas-blown optical cable of claim 1 wherein: The irregular sheath (1) is made of a high-hardness thermoplastic polyolefin elastomer material.

5. The quadro center gas-scrubbed optical cable of claim 1 wherein: The overall outer diameter of the irregular sheath (1) is 6.0 mm, and the width of the support foot of the irregular sheath (1) is 0.8-1.2 mm.

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