CN114442243B

CN114442243B - Optical cable

Info

Publication number: CN114442243B
Application number: CN202210067039.XA
Authority: CN
Inventors: 李国昌; 项飞; 何园园
Original assignee: Futong Group Co Ltd
Current assignee: Futong Group Co Ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2023-05-09
Anticipated expiration: 2042-01-20
Also published as: CN114442243A

Abstract

The invention belongs to the technical field of cables, and particularly relates to an optical cable which comprises an outer sheath, an inner sheath and a cable core assembly, wherein the outer sheath comprises an outer sheath on the outer side and an inner sheath on the inner side, the outer sheath and the inner sheath are connected through uniformly arranged connecting columns, and a deformation cavity is formed between adjacent connecting columns; the connecting column is obliquely arranged in the same direction, the two sides of the connecting column are respectively an inverted surface and a back surface, an included angle between the inverted surface and the inner sheath is smaller than 45 degrees, a part of the back surface, which is close to the inner sheath, is parallel to the inverted surface, a part of the back surface, which is close to the outer sheath, is obliquely arranged in a direction deviating from the inverted surface, and the width of the part, which is connected with the outer sheath, of the connecting column is larger than that of the part, which is connected with the inner sheath. When the top of the outer sheath is subjected to external force, the connecting column is inclined further towards the inclined direction, and the connecting column disperses the received external force by pulling or squeezing the part connected with the connecting column, so that the external force is prevented from being transmitted into the optical cable and damaging the optical fiber.

Description

Optical cable

Technical Field

The invention belongs to the technical field of cables, and particularly relates to an optical cable.

Background

The use environment of optical cable is complicated, and it mainly faces the harm that moist, foreign matter strike and mouse gnaw and take, in the scheme of present disclosure, when solving the anti-collision or the resistance to compression problem of optical cable, adopts the protective layer thickness that increases the optical cable generally, perhaps increases the buffering original paper in the optical cable is inside, and this kind of scheme can increase the weight of optical cable at first, and in addition, the optical cable diameter is less, and the buffer capacity of the buffer unit who sets up inside is limited, and when external force is too big, it still can damage optic fibre because of transition deformation.

Disclosure of Invention

The invention aims to provide an optical cable capable of guiding external force, which transmits the force to the rest part of an outer protective layer by enabling the outer protective layer at the outermost side to deviate after being stressed, and buffers the external force by deformation, so that the influence of the external force is minimized when the external force reaches an optical fiber.

In order to achieve the above purpose, the present invention provides the following technical solutions: the optical cable comprises an outer protective layer, an inner protective layer and a cable core assembly, wherein the outer protective layer comprises an outer protective layer on the outer side and an inner protective layer on the inner side, the outer protective layer and the inner protective layer are connected through uniformly arranged connecting columns, and deformation cavities are formed between adjacent connecting columns; the connecting column is obliquely arranged in the same direction, the two sides of the connecting column are respectively an inverted surface and a back surface, an included angle between the inverted surface and the inner sheath is smaller than 45 degrees, a part of the back surface, which is close to the inner sheath, is parallel to the inverted surface, a part of the back surface, which is close to the outer sheath, is obliquely arranged in the direction deviating from the inverted surface, and the width of the part of the connecting column, which is connected with the outer sheath, is larger than that of the part, which is connected with the inner sheath.

In the above technical scheme, the outer sheath has the bilayer structure of constituteing by oversheath and inner sheath, and two-layer setting is interval distribution's deformation chamber and spliced pole, because the spliced pole is according to the slope of same direction setting, and the slope of one side just is greater than 45, when the oversheath top receives external force, the spliced pole can at first be further inclined towards the incline direction, this process, the spliced pole can be through traction or extrusion with its continuous part dispersion external force of receiving to avoid the effect of external force to transmit to the optical cable inside and destroy optic fibre.

Preferably, the inner sheath is uniformly provided with limiting holes, the periphery of the inner sheath is provided with limiting heads inserted into the limiting holes, the width of each limiting head in the circumferential direction of the inner sheath is smaller than that of each limiting hole, and the inner sheath can relatively displace under the limitation of the limiting holes and the limiting heads. When the external force is larger, in the deformation process of the connecting column, the connecting column drives the outer sheath part connected with the connecting column to move towards the inclined direction, and meanwhile, the connecting column can also push the inner sheath connected with the connecting column to move towards the opposite direction, so that the inner sheath and the outer sheath can buffer the external force at the same time.

Preferably, the outer periphery of the inner sheath is provided with oil storage ring grooves at equal intervals along the length direction, and water-blocking ointment is stored in the oil storage ring grooves, so that the water-blocking ointment can not only fill the gap between the inner sheath and the inner sheath, but also lubricate the inner sheath.

Preferably, the filling cotton I is arranged in the deformation cavity, lime dry powder or cement dry powder is uniformly dispersed in the filling cotton I, and can absorb moisture entering the deformation cavity to keep the outer sheath dry.

Preferably, the deformation cavity is further provided with filling cotton II, fire extinguishing powder is uniformly dispersed in the filling cotton II, wherein the filling cotton I is positioned at the position of the outer sheath, and the filling cotton II is positioned at the position of the inner sheath.

Preferably, a plurality of groups of steel wire structures are arranged at equal intervals along the length direction of the optical cable in each connecting column, the inner end parts of the steel wire structures extend to the inner sheath, the outer end parts of the steel wire structures extend to the inner part of the outer sheath, and the steel wire structures can increase the structural strength of the connecting columns, so that the connecting columns can drive the movement of the connecting structures more when the optical cable is subjected to external force, and a good buffering effect is achieved. Meanwhile, the steel wire structure can improve the elasticity and the automatic restoration performance of the connecting column, so that the outer protective layer can be restored quickly after being subjected to external force.

Preferably, the steel wire structure comprises a first steel wire and a second steel wire which are distributed in a Y shape, wherein a part of the first steel wire extending into the outer sheath is a straight-thorn part, a part of the second steel wire extending into the outer sheath is a hook part, the straight-thorn part points to the inclined direction of the connecting column, and the hook part is away from the inclined direction of the connecting column. No matter which side of the optical cable starts to gnaw and bite, when the rat gnaws and bites to the steel wire structure, the straight thorn part or the hook part can directly prop against teeth of the rat or penetrate into the oral cavity of the rat, so that the effect of preventing the rat from gnawing and biting the optical cable is achieved.

Preferably, the inner sheath comprises an outermost polyethylene sheath, a middle armor layer and an inner middle armor layer, and waterproof cladding layers are respectively arranged between the middle armor layer and the polyethylene sheath and the middle armor layer.

Preferably, the cable core component comprises a buffer layer, and a reinforcing core is arranged at the center of the buffer layer; and a plurality of groups of beam tube units uniformly distributed around the reinforcing core are arranged in the buffer layer, and the beam tube units are filled with optical fibers.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic cross-sectional view of an optical cable according to an embodiment of the present invention;

FIG. 2 is a schematic view of the outer jacket of the cable of FIG. 1 in cross-section;

FIG. 3 is a schematic view of the inner jacket of the fiber optic cable of FIG. 1 in cross-section;

FIG. 4 is a schematic view of a biting status structure of the outer jacket of the optical cable shown in FIG. 1;

fig. 5 is a schematic view of deformation azimuth structure of each portion of the outer jacket of the optical cable shown in fig. 1 when an external force is applied.

In the figure, an outer sheath 1, an inner sheath 2, a deformation cavity 3, a connecting column 4, a polyethylene sheath 5, an armor layer 6, an inner sheath 7, a buffer layer 8, a reinforcing core 9, a beam tube unit 10, an optical fiber 11, a filling cotton I12, a filling cotton II13, a first steel wire 14, a second steel wire 15, a limiting hole 16, a limiting head 17, an oil storage ring groove 18, a reverse surface 41, a reverse surface 42, a straight thorn 141 and a hook 151 are shown.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings and examples, so that the implementation process of how the technical means are applied to solve the technical problems and achieve the technical effects of the present application can be fully understood and implemented accordingly.

FIG. 1 is an embodiment of the present invention of an optical cable comprising an outer jacket, an inner jacket and a cable core assembly, wherein the inner jacket comprises an outermost polyethylene jacket 5, a middle armor layer 6 and an inner middle armor layer 6, and a waterproof jacket is disposed between the middle armor layer 6 and the polyethylene jacket 5 and the middle armor layer 6, respectively; the cable core component comprises a buffer layer 8, and a reinforcing core 9 is arranged at the center of the buffer layer 8; inside the buffer layer 8, a plurality of groups of bundle tube units of filling optical fibers 11 uniformly distributed around the reinforcing core 9 are provided. The outer sheath in this embodiment is a double-layer structure composed of the outer sheath 1 and the inner sheath 2, which can deflect the impact force to one side through its own deformation, and buffer the pressure applied thereto, thereby protecting the inner cable core assembly from being affected.

Specifically, the outer sheath 1 and the inner sheath 2 are connected through eight uniformly arranged connecting columns 4, and deformation cavities 3 are formed between adjacent connecting columns 4; and filling cotton I12 and filling cotton II13 are arranged in the deformation cavity 3, wherein the filling cotton I12 is positioned at the position of the outer sheath 1, cement dry powder is uniformly dispersed in the filling cotton I, the filling cotton II13 is positioned at the position of the inner sheath 2, and fire extinguishing powder is uniformly dispersed in the filling cotton II. As shown in fig. 1 and 2, the connecting post 4 is obliquely arranged according to a clockwise direction, the side surface adjacent to the deformation cavity 3 is respectively a reverse surface 41 and a back surface 42, as shown in fig. 1, an included angle between the reverse surface 41 and the inner sheath 2 (specifically, a tangent line where the reverse surface 41 and the inner sheath 2 are connected) is smaller than 45 °, a part of the back surface 42 close to the inner sheath 2 is parallel to the reverse surface 41, and a part close to the outer sheath 1 is obliquely arranged in a direction away from the reverse surface 41, so that the whole back surface 42 is in a shape of 7, and based on the structure, the width of the part of the connecting post 4 connected with the outer sheath 1 is larger than the width of the part connected with the inner sheath 2 in the embodiment. When the top of the outer jacket 1 is subjected to an external force, the connection post 4 is first further inclined in an inclined direction, and in this process, the connection post 4 disperses the received external force by pulling or pressing the portion connected thereto, thereby preventing the external force from being transmitted to the inside of the optical cable and damaging the optical fiber.

According to the above structure, the inner sheath is subjected to a certain pressing force when the connecting post 4 presses the inner sheath 2 connected thereto, and in order to reduce the influence of this pressing force on the inner sheath, the present embodiment provides that the inner sheath 2 and the inner sheath can be relatively offset. Specifically, the inner sheath 2 is uniformly provided with limiting holes 16, the outer circumference of the polyethylene sheath 5 of the inner sheath is provided with limiting heads 17 inserted into the limiting holes 16, the outer circumference of the polyethylene sheath 5 is provided with oil storage ring grooves 18 at equal intervals along the length direction, and water blocking paste is stored in the oil storage ring grooves 18. As shown in fig. 2, the width of the limit head 17 is smaller than the width of the limit hole 16 in the circumferential direction of the inner sheath 2, so that the inner sheath 2 can be kept stable in the axial direction with the inner sheath and can be displaced relative to the inner sheath in the circumferential surface under the limit of the limit hole 16 and the limit head 17. As shown in fig. 5, when the uppermost part of the outer sheath 1 receives an external force F, the deformation state of the connection post 4 is shown as the upper part of the optical cable is inclined to the right, the lower part of the connection post presses the inner sheath 2 against the inclined direction, when the connection post 4 drives the part of the outer sheath 1 connected with the connection post to move clockwise, the connection post 4 also pushes the inner sheath 2 connected with the connection post to move in the opposite direction, and meanwhile, the outer sheath at the lower part of the optical cable also changes correspondingly, and in the whole process, the inner sheath can change the force transmission direction in the inner sheath 2 through the offset, and the buffering capacity of the outer sheath can be further improved.

In this embodiment, based on the above structural features of the outer sheath, the structural strength of the connection post 4 can be increased by arranging a plurality of groups of steel wire structures at equal intervals along the length direction of the optical cable in each connection post 4, so as to improve the buffering effect and the automatic restoration performance of the connection post 4. In addition, the steel wire structure is designed to resist rat gnawing. Specifically, the steel wire structure comprises a first steel wire 14 and a second steel wire 15, the first steel wire 14 and the second steel wire 15 are fixedly connected into a Y-shaped structure, an included angle a between the two steel wires is 60 degrees, and the lower end of the steel wire extends to the inner sheath 2. As shown in fig. 4, the upper end of the first wire 14 extends into the outer sheath 1 in the direction of the reverse surface 41 and into a part of the straight-prick portion 141, and the upper end of the second wire 15 extends into the outer sheath 1 in the direction of the reverse surface 42 and into a part of the hook portion 151. Based on the tooth and oral cavity characteristics according to the mouse, it can start gnawing from one side of the optical cable, but no matter what side of the optical cable starts gnawing and biting, when gnawing to the steel wire structure, the straight thorn portion 141 or the hook portion 151 can directly prop against the tooth of the mouse or penetrate into the oral cavity of the mouse, thereby playing a role of preventing the mouse from gnawing and biting the optical cable. In addition, when gnawing to the filling cotton I12, the cement dry powder in the filling cotton I12 is stuck to the oral cavity or the esophagus of the mouse, which can also play a role in preventing the mouse from continuously gnawing.

Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.

While the foregoing description illustrates and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.

Claims

1. An optical cable comprising an outer jacket, an inner jacket and a core assembly, characterized in that: the outer sheath comprises an outer sheath on the outer side and an inner sheath on the inner side, the outer sheath is connected with the inner sheath through uniformly arranged connecting columns, and deformation cavities are formed between the adjacent connecting columns; the spliced pole is according to clockwise slope setting, and its side adjacent with deformation chamber is face and the face of facing away from, falls to the contained angle between the tangent line of face and inner sheath junction and is less than 45, and the face of facing away from is close to the part of inner sheath and is parallel to the face of facing away from, and the part of being close to the oversheath is inclined towards the direction that deviates from the face of facing away from for whole face of facing away from is "7" shape, and makes the width of the part of spliced pole connection oversheath be greater than the width of the part of connecting the inner sheath.

2. The fiber optic cable of claim 1, wherein: the inner sheath is evenly provided with limiting holes, the periphery of the inner sheath is provided with limiting heads inserted into the limiting holes, the width of each limiting head in the circumferential direction of the inner sheath is smaller than that of each limiting hole, and meanwhile, the inner sheath can relatively displace with the inner sheath under the limitation of the limiting holes and the limiting heads.

3. The fiber optic cable of claim 2, wherein: the periphery of the inner protective layer is provided with oil storage ring grooves at equal intervals along the length direction, and water-blocking paste is stored in the oil storage ring grooves.

4. A fiber optic cable as claimed in any one of claims 1 to 3, wherein: and filling cotton I is arranged in the deformation cavity, and lime dry powder or cement dry powder is uniformly dispersed in the filling cotton I.

5. The fiber optic cable of claim 4, wherein: and filling cotton II is further arranged in the deformation cavity, and fire extinguishing powder is uniformly dispersed in the filling cotton II, wherein the filling cotton I is positioned on one side of the outer sheath, and the filling cotton II is positioned on one side of the inner sheath.

6. The fiber optic cable of claim 5, wherein: a plurality of groups of steel wire structures are arranged in each connecting column at equal intervals along the length direction of the optical cable, the inner ends of the steel wire structures extend to the inner sheath, and the outer ends extend to the inner part of the outer sheath.

7. The fiber optic cable of claim 6, wherein: the steel wire structure comprises first steel wires and second steel wires which are distributed in a Y shape, wherein a part of the first steel wires extending into the outer sheath is a straight-thorn part, a part of the second steel wires extending into the outer sheath is a hook part, the straight-thorn part points to the inclined direction of the connecting column, and the hook part is deviated from the inclined direction of the connecting column.

8. The fiber optic cable of claim 4, wherein: the inner protection layer comprises an outermost polyethylene sheath, an armor layer in the middle and an armor layer in the middle, and waterproof cladding layers are respectively arranged between the armor layer in the middle and the armor layers in the polyethylene sheath and the middle.

9. The fiber optic cable of claim 8, wherein: the cable core assembly comprises a buffer layer, and a reinforcing core is arranged at the center of the buffer layer; and a plurality of groups of beam tube units uniformly distributed around the reinforcing core are arranged in the buffer layer, and the beam tube units are filled with optical fibers.