Stretch-resistant optical cable

Abstract

The invention relates to the technical field of optical cables, in particular to a tensile optical cable. Each optical cable unit of the existing optical cable is lack of effective physical isolation and independent protection, and the capability of each optical cable to exert the independent tensile potential is greatly limited. Comprising a steel cable, the steel cable is fixedly connected with locking sleeves which are distributed at equal intervals, the locking sleeves are fixedly connected with three connecting pieces which are distributed at equal intervals in the circumferential direction, the connecting pieces are connected with T-shaped plates in a sliding mode, the sides, away from the adjacent connecting pieces, of the T-shaped plates are fixedly connected with fixing sleeves, the fixing sleeves which are distributed at equal intervals are jointly connected with rubber sleeves in a sliding mode, and the rubber sleeves are fixedly connected with the steel cable. The rubber sleeve is provided with an optical cable. The three optical cables are separated through the locking sleeve, the connecting piece, the T-shaped plate and the fixing sleeve, the situation that the conveying process of other optical cables is affected due to circuit faults of one optical cable is avoided, deformation of other optical cables is not affected even if one optical cable deforms, and the tensile property of the single optical cable is improved.

Description

Technical Field

[0001] This invention relates to the field of optical cable technology, and more particularly to a tensile-resistant optical cable. Background Technology

[0002] As the core carrier of modern information transmission, optical fiber is widely used in various fields such as communications, power, and transportation. In practical engineering applications, especially in scenarios involving long-distance trunk lines, pipeline laying, or crossing complex terrain (such as bridges and tunnels), it is often necessary to lay multiple optical fibers at the same time to meet the needs of different services or redundancy backup.

[0003] Currently, during the installation of optical cables, a steel cable supporting multiple optical cables is first fixed between two overhead structures, and then the optical cables are fixed to this steel cable. Another method involves evenly distributing the optical cables on the outside of the steel cable and then wrapping them together with a rubber sheath. While both methods effectively complete the installation of the optical cables, they result in a lack of effective physical isolation and independent protection between the individual optical cables. If one optical cable experiences a short circuit or localized overheating and burnout due to an accident (such as a lightning strike, a power line collision, or mechanical damage causing the fiber to break and generate an electric arc), the other optical cables will also be affected, thus impacting the transmission of the optical cables. Furthermore, since all the optical cables are rigidly bound within the same rubber sheath, when the rubber sheath is subjected to tensile force, all the optical cables within the sheath will be affected, greatly limiting the ability of each optical cable to exert its independent tensile strength. Summary of the Invention

[0004] In order to overcome the shortcomings of existing optical cables, such as the lack of effective physical isolation and independent protection between each optical cable unit, and the great limitation on the ability of each optical cable to exert its independent tensile strength potential, the present invention provides a separate tensile-resistant optical cable.

[0005] The technical solution of the present invention is: a tensile-resistant optical cable, comprising a steel cable, wherein the steel cable is fixedly connected to locking sleeves distributed at equal intervals, the locking sleeves are fixedly connected to three connectors distributed at equal intervals in the circumferential direction, the connectors are slidably connected to a T-shaped plate, the side of the T-shaped plate away from the adjacent connector is fixedly connected to a fixing sleeve, the equally spaced fixing sleeves are slidably connected to a rubber sleeve, and the rubber sleeve is provided with an optical cable.

[0006] As a further preferred embodiment, the rubber sleeve is provided with equally spaced expansion portions, which are located within adjacent fixed sleeves.

[0007] As a further preferred embodiment, the diameter of the expansion portion is larger than the diameter of other parts of the rubber sleeve.

[0008] As a further preferred embodiment, the optical cable is provided with equally spaced bends, which are located within adjacent expansion sections.

[0009] As a further preferred embodiment, the fixing sleeve is fixedly connected with symmetrically distributed limiting members, the diameter of which gradually decreases from the side closer to the adjacent fixing sleeve to the side farther away from the adjacent fixing sleeve, and the limiting members are used to limit the adjacent expansion portions.

[0010] As a further preferred embodiment, the limiting member is composed of circumferentially equally spaced elastic plates, the side of the circumferentially equally spaced elastic plates near the fixed sleeve is fixedly connected to the fixed sleeve, and the fixed sleeve is threadedly connected with symmetrically distributed threaded sleeves, the threaded sleeves being used to press against adjacent limiting members.

[0011] As a further preferred embodiment, the inner diameter of the non-threaded portion of the threaded sleeve gradually increases from the side away from the adjacent fixed sleeve to the side closer to the adjacent fixed sleeve.

[0012] As a further preferred embodiment, the locking sleeve is rotatably connected to symmetrically distributed rotating rings, and a torsion spring is provided between the rotating rings and the adjacent locking sleeves. The rotating rings are fixedly connected to circumferentially spaced blocking plates that are used to limit the movement of adjacent T-shaped plates.

[0013] As a further preferred embodiment, one of the connectors distributed circumferentially at equal intervals is located above the steel cable, and all the lower connectors are deformable on the side closest to the adjacent locking sleeve.

[0014] As a further preferred embodiment, the locking sleeve is fixedly connected to an arc-shaped plate located between two adjacent connecting members on the lower side.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention separates three optical cables by means of a locking sleeve, a connector, a T-shaped plate, and a fixing sleeve, which avoids the transmission process of other optical cables being affected by a circuit failure in one optical cable. Deformation of one optical cable will not affect the deformation of other optical cables, thus improving the tensile strength of a single optical cable. Deformation of the expansion and bending parts improves the tensile strength of the optical cable. The deformation provided by the expansion and bending parts allows the T-shaped plate to move out from the adjacent connector, thereby facilitating the removal of one optical cable. By setting the limiting member as an elastic plate, the limiting member deforms when the fixing sleeve is moved, which facilitates the disconnection of the connection between the optical cable and the steel cable. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a three-dimensional structural side view of the present invention; Figure 3 This is a three-dimensional structural cross-sectional view of the present invention; Figure 4 This is an exploded view of the three-dimensional structure of the connector and T-shaped plate of the present invention; Figure 5 This is a three-dimensional structural diagram of the expansion portion and the bending portion of the present invention; Figure 6 This is a three-dimensional structural diagram of the limiting component and the threaded sleeve of the present invention in a disengaged state.

[0017] In the attached drawings, the following labels are used: 1-steel cable, 2-locking sleeve, 201-arc plate, 3-connector, 4-T-shaped plate, 5-fixing sleeve, 6-rubber sleeve, 601-expansion part, 7-optical cable, 701-bending part, 8-limiting part, 9-threaded sleeve, 10-swivel ring, 11-blocking plate. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] Example 1

[0020] Currently, when laying multiple optical cables simultaneously, they are typically fixed to steel cables or wrapped in the same rubber sheath. This means that if one of the cables short-circuits, the operator needs to remove the entire rubber sheath, affecting the transmission of the other cables. Furthermore, if one cable burns out, the others will also burn out simultaneously, severely impacting the transmission process. With multiple cables wrapped in a single rubber sheath, when one cable is stretched and deformed, the others will also deform synchronously, significantly reducing the tensile strength of the optical cables.

[0021] A type of tensile-resistant optical cable, such as Figures 1-5 As shown, it includes a steel cable 1, and the steel cable 1 is fixed with locking sleeves 2 that are evenly spaced on the left and right sides. Figure 1(Only one is shown in the figure). The locking sleeve 2 is fixedly connected to three connectors 3 that are circumferentially evenly spaced. The connectors 3 are slidably connected to a T-shaped plate 4. The side of the T-shaped plate 4 away from the adjacent connector 3 is fixedly connected to a fixing sleeve 5. The evenly spaced fixing sleeves 5 are slidably connected to a rubber sleeve 6. The rubber sleeve 6 is provided with an optical cable 7. The rubber sleeve 6 is provided with expansion parts 601 that are evenly spaced on the left and right. The expansion parts 601 are located inside the adjacent fixing sleeves 5 and fit against the inner wall of the fixing sleeves 5. The diameter of the expansion parts 601 is larger than the diameter of other parts of the rubber sleeve 6. The optical cable 7 is provided with bending parts 701 that are evenly spaced on the left and right (the bending degree of the bending parts 701 shown in the figure is only used to show that the bending parts 701 are bent. The actual bending degree of the bending parts 701 is much smaller than the bending degree shown in the figure). The bending parts 701 are located inside the adjacent expansion parts 601. Except for the bending parts 701, all parts of the optical cable 7 are fixedly connected to the adjacent rubber sleeves 6. The fixing sleeve 5 is fixedly connected to two limiting members 8 that are symmetrically distributed on the left and right. In this embodiment, the limiting members 8 are annular sleeves (e.g., Figure 3 As shown), the diameter of the limiting member 8 gradually decreases from the side closer to the adjacent fixed sleeve 5 to the side farther away from the adjacent fixed sleeve 5. The left and right sides of the expansion part 601 are limited by the adjacent limiting member 8. At the same time, the expansion part 601 keeps the bending part 701 in a bent state due to its own shape characteristics.

[0022] Before using optical cable 7, the operator followed... Figure 1 The connection method shown installs each component. After installation, during the subsequent erection process, the steel cable 1 supports the three optical cables 7, increasing overall stability. Furthermore, deformation of one optical cable 7 will not affect the deformation of the others, improving the tensile strength of each individual optical cable 7. In the initial state, the left and right sides of the expansion section 601 are limited by adjacent limiting members 8. Taking the upper optical cable 7 as an example, when the rubber sleeve 6 and the optical cable 7 are stretched, as... Figure 5 As shown, taking the upper curved portion 701 as an example, when the left and right sides of the curved portion 701 are stretched, the curved portion 701 gradually straightens, increasing the stretchable length of the optical cable 7, thereby improving the tensile strength of the optical cable 7. When the left and right sides of the expansion portion 601 are stretched, the expansion portion 601 deforms, its central diameter decreases, and the expansion portion 601 is stretched. The stretchable length of the rubber sleeve 6 increases simultaneously. The tensile strength of a single optical cable 7 is improved simultaneously through the expansion portion 601 and the curved portion 701. When the external force no longer stretches the rubber sleeve 6 and the optical cable 7, the left and right sides of the expansion portion 601 are reset under the compression of the adjacent limiting member 8 and their own deformation, and their diameter gradually recovers. During the reset process of the expansion portion 601, the parts of the rubber sleeve 6 located on the left and right sides of the expansion portion 601 pull the optical cable 7, causing the parts of the optical cable 7 located on both sides of the curved portion 701 to move closer to each other. The curved portion 701 returns to the curved state to adapt to the next stretching process.

[0023] When one of the optical cables 7 experiences a short circuit or needs to be removed, taking the upper optical cable 7 as an example, the specific operation is as follows: The operator pulls the T-shaped plate 4 to the right (taking pulling to the right as an example only). The T-shaped plate 4 moves the fixing sleeve 5, the two limiting pieces 8, the rubber sleeve 6, and the optical cable 7 to the right. During the movement of the rubber sleeve 6 and the optical cable 7 to the right, the diameter of the expansion part 601 on the left side of the moved fixing sleeve 5 narrows and the bending part 701 straightens, thereby allowing the rubber sleeve 6 and the optical cable 7 to move to the right. When the T-shaped plate 4 is removed from the connector 3, the connection between the optical cable 7 at that position and the steel cable 1 is broken. If it is necessary to disconnect the connection at other positions, the above steps are repeated. After the optical cable 7 at that position is removed, the operator... The operator repairs this section of optical cable 7. After the repair is completed, the operator inserts the T-shaped plate 4 into the adjacent connector 3, and the optical cable 7 continues to work. By separating the three optical cables 7, the circuit failure of one optical cable 7 is prevented from affecting the transmission process of the other optical cables 7. The deformation of one optical cable 7 will not affect the deformation of the other optical cables 7, thus improving the tensile strength of the individual optical cable 7. The deformation of the expansion part 601 and the bending part 701 improves the tensile strength of the optical cable 7. The deformation provided by the expansion part 601 and the bending part 701 allows the T-shaped plate 4 to be removed from the adjacent connector 3, thereby facilitating the removal of one of the optical cables 7.

[0024] Example 2

[0025] Based on Example 1, a tensile-resistant optical cable, such as Figures 4-6 As shown, the limiting member 8 is composed of elastic plates that are evenly distributed in the circumferential direction. The side of the elastic plates that are evenly distributed in the circumferential direction is fixed to the fixed sleeve 5. The fixed sleeve 5 is threadedly connected to two threaded sleeves 9 that are symmetrically distributed on the left and right. The threaded sleeves 9 are used to press the adjacent limiting member 8 so that the limiting member 8 is in close contact with the expansion part 601 and limits the expansion part 601. The inner diameter of the non-threaded part of the threaded sleeve 9 gradually increases from the side away from the adjacent fixed sleeve 5 to the side closer to the adjacent fixed sleeve 5.

[0026] When laying the optical cable 7, in order to improve the stability between the optical cable 7 and the steel cable 1, it is necessary to increase the length of the T-shaped plate 4. However, increasing the length of the T-shaped plate 4 is not conducive to the T-shaped plate 4 being moved out of the adjacent connector 3. In Embodiment 1, moving the T-shaped plate 4 out of the adjacent connector 3 requires deformation of the expansion portion 601 at other positions. In order to reduce the force required to move the T-shaped plate 4 out of the adjacent connector 3, the limiting member 8 is set as a circumferentially distributed elastic plate to facilitate the movement of the T-shaped plate 4 out of the adjacent connector 3.

[0027] Taking one of the T-shaped plates 4 on the upper side as an example, the operator first rotates the two threaded sleeves 9. When the threaded sleeves 9 move from the outside of the adjacent limiting member 8 to the outside of the rubber sleeve 6 (located on both sides of the expansion part 601), the two limiting members 8 are no longer limited. At this time, the operator moves the T-shaped plate 4 to the right. The T-shaped plate 4 drives the fixed sleeve 5 and the two limiting members 8 to move to the right. The left limiting member 8 deforms after contacting the left side of the expansion part 601. The diameter of the left part of the left limiting member 8 gradually increases. When the diameters of the left and right sides of the left limiting member 8 are equal, the state is as follows. Figure 6 As shown, the operator then removes the T-shaped plate 4 from the connector 3. By setting the limiting member 8 as an elastic plate, the limiting member 8 deforms when the fixed sleeve 5 is moved, facilitating the disconnection of the connection between the optical cable 7 and the steel cable 1. When it is necessary to... Figure 6 The state shown becomes Figure 5 In the indicated state, the operator moves the fixed sleeve 5 to the left, which in turn moves the two limiting members 8 to the left. When the left limiting member 8 contacts the left side of the expansion part 601, the elasticity of the left limiting member 8 is released, and the diameter of the left part of the left limiting member 8 gradually decreases. When the elasticity of the left limiting member 8 is restored, the operator controls the threaded sleeve 9 to approach the adjacent limiting member 8 and screws the threaded sleeve 9 onto the fixed sleeve 5. At this time, the threaded sleeve 9 and the adjacent limiting member 8 (circumferentially distributed elastic plates) have the same function as the limiting member 8 (ring sleeve) in Embodiment 1, and both can achieve the function of limiting the adjacent expansion part 601.

[0028] Example 3

[0029] Based on Example 2, a tensile-resistant optical cable, such as Figure 3 and Figure 4 As shown, the locking sleeve 2 is rotatably connected to two symmetrically distributed rotating rings 10. A torsion spring is provided between the rotating ring 10 and the adjacent locking sleeve 2. The rotating ring 10 is fixed with a circumferentially evenly distributed blocking plate 11 used to limit the adjacent T-shaped plate 4, so as to ensure the stability between the T-shaped plate 4 and the adjacent connecting piece 3, and indirectly ensure the stability between the optical cable 7 and the steel cable 1.

[0030] During normal use of the optical cable 7, the blocking plate 11 of the rotating ring 10 limits the left or right side of the adjacent T-shaped plate 4, ensuring the stability between the T-shaped plate 4 and the adjacent connecting piece 3, and indirectly ensuring the stability between the optical cable 7 and the steel cable 1. Before the T-shaped plate 4 is removed from the adjacent connecting piece 3, the operator rotates the two rotating rings 10 on the locking sleeve 2. The torsion spring on the rotating ring 10 stores force, and the rotating ring 10 drives the blocking plate 11 on it to rotate. When the blocking plate 11 no longer limits the adjacent T-shaped plate 4, the operator removes the T-shaped plate 4 from the adjacent connecting piece 3. Then the operator no longer controls the two rotating rings 10, the torsion of the torsion spring on the rotating ring 10 is released, and the rotating ring 10 drives the blocking plate 11 on it to rotate in the opposite direction to reset, and limits the other T-shaped plates 4 again.

[0031] Example 4

[0032] Based on Example 3, a tensile-resistant optical cable, such as Figure 2 and Figure 3 As shown, one of the connectors 3, which are circumferentially spaced, is located above the steel cable 1, and the locking sleeve 2 is fixed to an arc-shaped plate 201 located between two adjacent connectors 3 on the lower side.

[0033] After the optical cable 7 is installed, the steel cable 1 and the optical cable 7 installed on it cause the steel cable 1 located between the two overhead structures to bend downwards. Especially when snow accumulates on the steel cable 1 or optical cable 7, the bending degree of the steel cable 1 is more obvious. Therefore, in this embodiment, the two lower connectors 3 can deform to reduce the bending force on the optical cable 7 on the two lower connectors 3. When there are attached substances (rain and snow) on the steel cable 1 or when it bends downwards after long-term use, the two connectors 3 will deform on the side close to the adjacent locking sleeve 2. Therefore, the two lower connectors 3 will move away from each other and the included angle between them will gradually be greater than 120°. The two lower optical cables 7 will not bend synchronously with the steel cable 1, so that the bending degree of the two lower optical cables 7 is reduced, thereby avoiding the two optical cables 7 being excessively bent and affecting the transmission process. Before the steel cable 1 is significantly bent, the arc plate 201 is located between the two adjacent connectors 3 to prevent the two connectors 3 from getting close to each other and to ensure that the adjacent connectors 3 are at a safe distance.

[0034] The above are merely embodiments of the present invention and are not intended to limit the invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A tensile-resistant optical cable, characterized in that: It includes a steel cable (1), the steel cable (1) is fixedly connected to a locking sleeve (2) with equal spacing, the locking sleeve (2) is fixedly connected to three connectors (3) with equal spacing in the circumferential direction, the connectors (3) are slidably connected to a T-shaped plate (4), the side of the T-shaped plate (4) away from the adjacent connector (3) is fixedly connected to a fixing sleeve (5), the fixing sleeves (5) with equal spacing are slidably connected to a rubber sleeve (6), and the rubber sleeve (6) is provided with an optical cable (7); The rubber sleeve (6) is provided with equally spaced expansion portions (601), which are located within the adjacent fixed sleeve (5); the optical cable (7) is provided with equally spaced bending portions (701), which are located within the adjacent expansion portions (601).

2. The tensile-resistant optical cable according to claim 1, characterized in that: The diameter of the expansion portion (601) is larger than the diameter of other parts of the rubber sleeve (6).

3. The tensile-resistant optical cable according to claim 1, characterized in that: The fixed sleeve (5) is fixed with symmetrically distributed limiting members (8). The diameter of the limiting members (8) gradually decreases from the side closer to the adjacent fixed sleeve (5) to the side farther away from the adjacent fixed sleeve (5). The limiting members (8) are used to limit the adjacent expansion part (601).

4. The tensile-resistant optical cable according to claim 3, characterized in that: The limiting member (8) is composed of elastic plates that are evenly spaced in the circumferential direction. The side of the elastic plates that are evenly spaced in the circumferential direction close to the fixed sleeve (5) is fixedly connected to the fixed sleeve (5). The fixed sleeve (5) is threaded with symmetrically distributed threaded sleeves (9). The threaded sleeves (9) are used to press the adjacent limiting member (8).

5. A tensile-resistant optical cable according to claim 4, characterized in that: The inner diameter of the non-threaded portion of the threaded sleeve (9) gradually increases from the side away from the adjacent fixed sleeve (5) to the side closer to the adjacent fixed sleeve (5).

6. The tensile-resistant optical cable according to claim 5, characterized in that: The locking sleeve (2) is rotatably connected to symmetrically distributed rotating rings (10). A torsion spring is provided between the rotating ring (10) and the adjacent locking sleeve (2). The rotating ring (10) is fixed with circumferentially evenly distributed blocking plates (11) used to limit the adjacent T-shaped plates (4).

7. A tensile-resistant optical cable according to claim 6, characterized in that: One of the connectors (3) that are circumferentially spaced at equal intervals is located above the steel cable (1), and all the lower connectors (3) can be deformed on the side near the adjacent locking sleeve (2).

8. A tensile-resistant optical cable according to claim 7, characterized in that: The locking sleeve (2) is fixedly connected to an arc-shaped plate (201) located between two adjacent connectors (3) on the lower side.

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