Multi-unit butterfly-shaped leading-in optical cable easy to expand

Abstract

The invention belongs to the technical field of optical cables, and discloses an easy-to-expand multi-unit butterfly-shaped leading-in optical cable, which is provided with a plurality of butterfly-shaped units, a plurality of expansion units, a first coating layer and a second coating layer, and is characterized in that each butterfly-shaped unit is composed of an optical fiber, two reinforcing members and a butterfly-shaped sheath, and the butterfly-shaped sheath wraps the optical fiber and the reinforcing members; the expansion unit is formed by processing an expansion body; a containing groove is formed from the center of each edge of the expansion body to the center, and the expansion body between the adjacent containing grooves is used for expanding blades; all the expansion units are spliced to form a cable core, and each expansion unit is provided with one containing groove which is spliced with one containing groove of the adjacent expansion unit to form a complete containing groove. The butterfly-shaped unit is placed in the accommodating groove; the cable core is wrapped by the first wrapping layer, and the first wrapping layer is wrapped by the second wrapping layer. The invention has the beneficial technical effects of simple structure, easy manufacture, easy expansion, more stable structure and more flexible use.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cables, and in particular relates to an easily expandable multi-unit butterfly-shaped introduction optical cable. Background Art

[0002] In the existing technology, there are two ways to access broadband. One is shared access, that is, after connecting a fiber to the device, it is distributed, and then the fiber or network cable is used to enter the household. This method cannot meet the user's demand for wider bandwidth. The other is independent access, that is, after connecting multiple fibers to the device, they are distributed, and each household is connected to a corresponding fiber. This method can meet people's demand for wider bandwidth.

[0003] However, in the prior art, CN220553019U discloses a multi-core butterfly-shaped optical cable having a plurality of butterfly-shaped introduction units, and an inner / outer serial connection body, wherein the butterfly-shaped introduction unit is composed of a first and a second reinforcement member, an optical fiber, a first and a second extension body, a first and a second connector, and a first and a second sheath, wherein the optical fiber is located inside the joint of the connector, and the extension body has serial connection holes which are intermittently distributed and laterally penetrated, and a single butterfly-shaped introduction unit is an integrated structure; the cross-section of the outer edge of all the butterfly-shaped introduction units is a circular or elliptical structure, and a hollow inner cavity is formed inside all the butterfly-shaped introduction units, and the inner serial connection body connects all the second extension bodies located inside in sequence, and the outer serial connection body connects all the first extension bodies located outside in sequence.

[0004] CN202631820U discloses a multi-core easy-to-branch butterfly-shaped lead-in optical cable for FTTH, which twists multiple butterfly-shaped lead-in optical cables around a central reinforcement member at an appropriate pitch, secures them by longitudinally wrapping them with tape, and then extrude a layer of sheath. A cable opening rope is provided between the sheath and the longitudinal wrapping of the tape, which is used to peel the sheath during construction.

[0005] The defects of the above structure are: (1) The butterfly-shaped lead-in units are distributed around the reinforcement, and their long axes are perpendicular to the axis of the reinforcement passing through the center of the reinforcement. When multiple butterfly-shaped lead-in units are required, the product structure is bulky, the material consumption is high, and the cost remains high; (2) It is not convenient for on-site assembly and expansion. After the reinforcement is determined, the number of butterfly-shaped lead-in units on its periphery is also determined; (3) The structure is unstable, mainly because the butterfly-shaped lead-in unit has a rectangular cross-section or a similar rectangular cross-section structure, which is tangent to the circular reinforcement, and the structure is unstable and will fall apart after the sheath is peeled off. Summary of the invention

[0006] To solve the above problems, the purpose of the present invention is to disclose an easily expandable multi-unit butterfly-shaped optical cable, which is implemented by adopting the following technical solutions.

[0007] The invention discloses an easily expandable multi-unit butterfly-shaped optical cable, comprising a plurality of butterfly-shaped units, a plurality of expansion units, a first cladding layer and a second cladding layer. The butterfly-shaped unit is composed of an optical fiber, two reinforcing members and a butterfly-shaped sheath. The two reinforcing members are respectively located on both sides of the optical fiber, and the butterfly-shaped sheath covers the optical fiber and the reinforcing members. The expansion unit is processed from an expansion body with a regular hexagonal cross section. A receiving groove is formed from the center of each side of the expansion body toward the center. The expansion bodies between adjacent receiving grooves are called expansion blades, and adjacent receiving grooves are not connected. All the expansion units are assembled to form a cable core with a cross-sectional shape approximately in the shape of a regular hexagon. Each expansion unit has a receiving groove, which is assembled with a receiving groove of an adjacent expansion unit to form a complete receiving groove. Each receiving groove has a butterfly-shaped unit. The first cladding layer covers the cable core, and the second cladding layer covers the first cladding layer.

[0008] In the above-mentioned easily expandable multi-unit butterfly-shaped optical cable, all the expansion units are assembled to form a cable core with a cross-sectional shape that is approximately a regular hexagon.

[0009] In the above-mentioned easily expandable multi-unit butterfly-shaped optical cable introduction, the cross section of the receiving groove is semi-elliptical, and the long axis of the receiving groove coincides with the symmetry axis passing through the center of the expansion body and bisecting the side where the receiving groove is located.

[0010] In the above-mentioned easily expandable multi-unit butterfly-shaped introduction optical cable, the cross section of the butterfly-shaped sheath is elliptical.

[0011] In the above-mentioned easily expandable multi-unit butterfly-shaped lead-in optical cable, the center of the reinforcement member and the center of the optical fiber are located on the long axis of the butterfly-shaped sheath.

[0012] In the above-mentioned easily expandable multi-unit butterfly-shaped introduction optical cable, the center of the optical fiber coincides with the center of the butterfly-shaped sheath.

[0013] The invention discloses an easily expandable multi-unit butterfly-shaped optical cable, comprising a plurality of butterfly-shaped units, a plurality of expansion units and a second coating layer. The butterfly-shaped unit is composed of an optical fiber, two reinforcing members and a butterfly-shaped sheath. The two reinforcing members are respectively located on both sides of the optical fiber, and the butterfly-shaped sheath covers the optical fiber and the reinforcing members. The expansion unit is processed from an expansion body with a regular hexagonal cross section. A receiving groove is formed from the center of each side of the expansion body toward the center. The expansion bodies between adjacent receiving grooves are called expansion blades, and adjacent receiving grooves are not connected. All the expansion units are assembled to form a cable core with a cross-sectional shape approximately in the shape of a regular hexagon. Each expansion unit has a receiving groove, which is assembled with a receiving groove of an adjacent expansion unit to form a complete receiving groove. Each receiving groove has a butterfly-shaped unit. The second coating layer covers the cable core.

[0014] The present application has the following main beneficial technical effects: simple structure, easy to manufacture, easy to expand, more stable structure, and more flexible use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure after dissection of a section of the present invention.

[0016] Figure 2 for Figure 1 Schematic diagram of the enlarged cross-section structure.

[0017] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the cable core formed by the expansion units used in the cable.

[0018] Figure 4 for Figure 3 Schematic diagram of the enlarged cross-section structure.

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of a dissected section of the extension unit used in this application.

[0020] Figure 6 for Figure 5 Schematic diagram of the enlarged cross-section structure.

[0021] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure before forming.

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of a section of the butterfly unit used in the present invention after dissection.

[0023] Fig. 9 for Figure 8 Schematic diagram of the enlarged cross-section structure. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand and implement this patent, the marks in the drawings are now described in detail in conjunction with the drawings in the specification.

[0025] In the figure: 1—butterfly-shaped unit, 2—extension unit, 3—first cladding layer, 4—second cladding layer, 11—reinforcement member, 12—optical fiber, 13—butterfly-shaped sheath, 21—extension body, 22—extension blades, 23—accommodation groove, C—extension body center.

[0026] Please see Figures 1 to 9, an easily expandable multi-unit butterfly-shaped lead-in optical cable, comprising a plurality of butterfly-shaped units 1, a plurality of expansion units 2, a first coating layer 3, and a second coating layer 4, wherein the butterfly-shaped unit 1 is composed of an optical fiber 12, two reinforcing members 11, and a butterfly-shaped sheath 13, wherein the two reinforcing members 11 are respectively located on both sides of the optical fiber 12, and the butterfly-shaped sheath 13 covers the optical fiber and the reinforcing member; the expansion unit 2 is processed by an expansion body 21 with a regular hexagonal cross section; a receiving groove 23 is formed from the center of each side of the expansion body toward the center, and the expansion body 21 between adjacent receiving grooves 23 is called an expansion blade 22, and adjacent receiving grooves 23 are not connected; all the expansion units 2 are assembled to form a cable core with a cross-sectional shape of a regular hexagon, and each expansion unit 2 has a receiving groove 23 which is assembled with a receiving groove 23 of an adjacent expansion unit 2 to form a complete receiving groove; each receiving groove has a butterfly-shaped unit 1; the first coating layer 3 covers the cable core, and the second coating layer 4 covers the first coating layer 3.

[0027] In the present application, only one butterfly unit 1 can be placed in each receiving slot.

[0028] Please see Figure 4 All the expansion units 2 are assembled to form a cable core with an approximately regular hexagonal cross-sectional shape. The cable core with an approximately regular hexagonal cross-sectional shape is shown by the dotted line in the figure.

[0029] In the above-mentioned easily expandable multi-unit butterfly-shaped optical cable introduction, the cross section of the receiving groove 23 is semi-elliptical, and the long axis of the receiving groove 23 coincides with the symmetry axis passing through the center C of the expansion body and bisecting the side where the receiving groove 23 is located.

[0030] In the above-mentioned easily expandable multi-unit butterfly-shaped optical cable, the cross section of the butterfly-shaped sheath 13 is elliptical.

[0031] In the above-mentioned easily expandable multi-unit butterfly-shaped lead-in optical cable, the center of the strength member 11 and the center of the optical fiber 12 are located on the long axis of the butterfly-shaped sheath 13 .

[0032] In the above-mentioned easily expandable multi-unit butterfly-shaped introduction optical cable, the center of the optical fiber 12 coincides with the center of the butterfly-shaped sheath 13 .

[0033] In the easily expandable multi-unit butterfly-shaped optical cable introduced in the present application, the material of the strength member 11 is steel wire, iron wire, aluminum wire, copper wire, glass fiber reinforced plastic rod, aramid yarn or glass fiber yarn.

[0034] The easily expandable multi-unit butterfly-shaped introduction optical cable described in the present application has an optical fiber 12 of model G.652 or G.653 or G.654 or G.654 or G.656 or G.657 or A1a or A1b or A1c or A1d.

[0035] In the easily expandable multi-unit butterfly-shaped optical cable introduced in the present application, the material of the butterfly-shaped sheath 13 is plastic, preferably flame-retardant plastic.

[0036] In the easily expandable multi-unit butterfly-shaped optical cable introduced in the present application, the material of the expansion body 21 is plastic, preferably flame-retardant plastic.

[0037] The present application describes an easily expandable multi-unit butterfly-shaped introduction optical cable, wherein the first coating layer 3 can be polyester yarn or aramid yarn or water-blocking yarn or polyester tape or water-blocking tape or non-woven fabric, one of the functions of which is to cover the expansion unit 2 to stabilize the cable core structure.

[0038] In the easily expandable multi-unit butterfly-shaped optical cable introduced in the present application, the material of the second coating layer 4 is plastic, preferably flame-retardant plastic.

[0039] The easily expandable multi-unit butterfly-shaped optical cable introduced in the present application can be constructed such that the first coating layer 3 can be omitted and the second coating layer 4 is directly coated on the outside of the cable core. The second coating layer 4 can be polyurethane. Since polyurethane has high elasticity, it can be made thinner and can be covered on the outside of the cable core during construction, so the construction is extremely convenient and fast.

[0040] In the present application, the preferred method is that the cross section of the butterfly unit 1 is elliptical, the cross section of the receiving groove is also elliptical, the butterfly unit 1 can be placed in the receiving groove, and the receiving groove is slightly larger than the butterfly unit 1, so that the structure is more stable.

[0041] In the present application, it is not limited to the case where the cable core has 19 extension units 2 as illustrated in the implementation examples and the drawings of the specification, but it can also be other cases. For example, when the cable core is approximately a regular hexagon, there are 7 extension units 2, that is, 2 in the first layer, 3 in the second layer, and 2 in the third layer; it can also be other multiples, forming a structure with multiple other structures on each side. Under the inspiration of the present application, personnel in the technical field can make it without making creative contributions.

[0042] Compared with the prior art, the present application omits the central reinforcement member, and adopts the reinforcement member 11 of the butterfly unit 1 to also strengthen the tension of the optical cable; the expansion unit 2 can be conveniently and quickly expanded by fitting and splicing the edges accordingly, thereby increasing the number of butterfly units 1; and the expansion unit 2 is convenient to store and easy to produce; it is easy to replace and can be expanded into cable cores of different sizes, so the product structure is relatively small, the material consumption is relatively reduced, and the cost is significantly reduced; due to the structure of the expansion unit 2 and the structure of the butterfly unit 1, its extensibility and flexibility are greatly improved, and the number of butterfly units 1 can be expanded as needed; due to the surface contact between adjacent expansion units 2, compared with the line contact between the butterfly unit 1 and the reinforcement member in the prior art, the stability and reliability are greatly improved; therefore, the present application solves the problems existing in the prior art.

[0043] The present application has the following main beneficial technical effects: simple structure, easy to manufacture, easy to expand, more stable structure, and more flexible use.

[0044] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An easily expandable multi-unit butterfly-shaped optical cable, comprising a plurality of butterfly-shaped units (1), a plurality of expansion units (2), a first coating layer (3), and a second coating layer (4), wherein the butterfly-shaped unit (1) is composed of an optical fiber (12), two reinforcement members (11), and a butterfly-shaped sheath (13), wherein the two reinforcement members (11) are respectively located on both sides of the optical fiber (12), and the butterfly-shaped sheath (13) covers the optical fiber and the reinforcement members; the characteristics are as follows: The expansion unit (2) is processed from an expansion body (21) with a regular hexagonal cross section; a receiving groove (23) is formed from the center of each side of the expansion body, and the expansion body (21) between adjacent receiving grooves (23) is called an expansion blade (22), and adjacent receiving grooves (23) are not connected; all the expansion units (2) are assembled to form a cable core with a cross-sectional shape that is approximately regular hexagonal, and each expansion unit (2) has a receiving groove (23) that is assembled with a receiving groove (23) of an adjacent expansion unit (2) to form a complete receiving groove; each receiving groove has a butterfly unit (1); the first coating layer (3) covers the cable core, and the second coating layer (4) covers the first coating layer (3).

2. The easily expandable multi-unit butterfly-shaped drop optical cable according to claim 1, characterized in that: Only one butterfly unit (1) can be placed in each receiving slot.

3. The easily expandable multi-unit butterfly-shaped drop optical cable according to claim 2, characterized in that: The cross section of the butterfly-shaped sheath (13) is elliptical.

4. The easily expandable multi-unit butterfly-shaped drop optical cable according to claim 3, characterized in that: The center of the reinforcement member (11) and the center of the optical fiber (12) are located on the long axis of the butterfly-shaped sheath (13).

5. The easily expandable multi-unit butterfly-shaped drop optical cable according to claim 4, characterized in that: The center of the optical fiber (12) coincides with the center of the butterfly-shaped sheath (13).

6. The easily expandable multi-unit butterfly-shaped drop optical cable according to claim 5, characterized in that: The cross section of the accommodating groove (23) is semi-elliptical, and the major axis of the accommodating groove (23) coincides with a symmetry axis that passes through the center of the extended body and bisects the side where the accommodating groove (23) is located.

7. The easily expandable multi-unit butterfly-shaped drop optical cable according to claim 6, characterized in that: The material of the reinforcement member (11) is steel wire, iron wire, aluminum wire, copper wire, glass fiber reinforced plastic rod, aramid yarn or glass fiber yarn.

8. The easily expandable multi-unit butterfly-shaped drop optical cable according to claim 7, characterized in that: The model of the optical fiber (12) is G.652 or G.653 or G.654 or G.654 or G.656 or G.657 or A1a or A1b or A1c or A1d.

9. The easily expandable multi-unit butterfly-shaped drop optical cable according to claim 8, characterized in that: The material of the butterfly sheath (13) is plastic.

10. The easily expandable multi-unit butterfly-shaped drop optical cable according to claim 9, characterized in that: The material of the second covering layer (4) is plastic.

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