CN114442243A

CN114442243A - Optical cable

Info

Publication number: CN114442243A
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: 2022-05-06
Anticipated expiration: 2042-01-20
Also published as: CN114442243B

Abstract

The invention belongs to the technical field of cables, and particularly relates to an optical cable which comprises an outer protective layer, an inner protective layer and a cable core assembly, wherein the outer protective layer comprises an outer protective sleeve and an inner protective sleeve, the outer protective sleeve and the inner protective sleeve are connected through uniformly arranged connecting columns, and a forming deformation cavity is formed between the adjacent connecting columns; the spliced pole sets up according to same direction slope, and its both sides are the falling face and the face of dorsad respectively, and wherein the contained angle between falling face and the inner sheath is less than 45, and the face of dorsad is close to partly parallel with the falling face of inner sheath, and partly towards the direction slope that deviates from the falling face of oversheath near the part of oversheath to make the width of the part that the spliced pole is connected the oversheath be greater than the width of the part of connecting the inner sheath. When the oversheath top received external force, the spliced pole at first can further incline towards the incline direction, and this process, spliced pole can disperse the external force received through drawing or extrusion rather than the part that links to each other to avoid the effect of external force to transmit inside and the destruction optic fibre of optical cable.

Description

Optical cable

Technical Field

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

Background

The service environment of optical cable is complicated, it mainly faces the harm of humidity, foreign object striking and mouse gnawing, among the scheme disclosed at present, when the anti striking or the resistance to compression problem of solving optical cable, adopt the protective layer thickness that increases optical cable usually, perhaps increase the buffering original paper in the optical cable is inside, the weight of optical cable can be increased at first to this type of scheme, in addition, the optical cable diameter is less, the buffer capacity of setting the buffer part in inside is limited, 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 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, thereby minimizing the influence of the external force when the external force reaches the optical fiber.

In order to achieve the purpose, the invention provides the following technical scheme: an 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 sleeve and an inner protective sleeve, the outer protective sleeve and the inner protective sleeve are connected through uniformly arranged connecting columns, and a deformation cavity is formed between the adjacent connecting columns; the spliced pole sets up according to same direction slope, and its both sides are the falling face and the dorsad respectively, and wherein the contained angle between falling face and the inner sheath is less than 45, and the dorsad is close to partly parallel with the falling face of inner sheath, and partly towards the direction slope that deviates from the falling face of oversheath near the partly of oversheath to make the width of the part that the spliced pole is connected the oversheath be greater than the width of the part of connecting the inner sheath.

In above-mentioned technical scheme, the outer jacket has the bilayer structure who comprises oversheath and inner sheath, two-layer deformation chamber and the spliced pole that sets up to interval distribution, because the spliced pole sets up according to same direction slope, and the slope of one side is greater than 45 with regard to the angle, when the oversheath top receives external force, the spliced pole at first can further slope towards the incline direction, this process, the spliced pole can be through drawing or extrusion rather than the part that links to each other come the dispersion received external force, thereby avoid the effect of external force to transmit inside and destruction optic fibre of optical cable.

Preferably, evenly set up spacing hole on the inner sheath, set up the spacing head that inserts spacing hole in the periphery of inner sheath, the width of spacing head is less than the width in spacing hole on the circumferencial direction of inner sheath, and the inner sheath can take place relative displacement with the inner sheath under spacing hole and the restriction of spacing head. When external force is large, 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 outer force can be buffered by the inner sheath and the outer sheath at the same time.

Preferably, oil storage ring grooves are formed in the periphery of the inner protective layer at equal intervals along the length direction, water-blocking cream is stored in the oil storage ring grooves, and the water-blocking cream can fill a gap between the inner protective layer and can also lubricate the inner protective layer.

Preferably, the filled cotton I is arranged in the deformation cavity, lime dry powder or cement dry powder is uniformly dispersed in the filled cotton I, the lime dry powder or the cement dry powder can absorb water entering the deformation cavity, so that the outer protective layer is kept dry, and meanwhile, in a mine cavity environment, when a mouse bites through the outer protective layer, the lime dry powder or the cement dry powder in the filled cotton I enters the oral cavity of the mouse, so that the mouse is prevented from biting the optical cable in time.

Preferably, the deformation cavity is further internally provided with filling cotton II, the fire extinguishing powder is uniformly dispersed in the filling cotton II, the filling cotton I is located at the position attached to the outer sheath, and the filling cotton II is located at the position attached to the inner sheath.

Preferably, set up a plurality of groups of steel wire structures along the length direction of optical cable equidistant in every spliced pole, the inner end of steel wire structure extends to the inner sheath, and inside outer end extended to the oversheath, the steel wire structure can increase the structural strength of spliced pole for when the optical cable suffered external force, the spliced pole can more drive the removal of continuous structure, in order to reach good buffering effect. Simultaneously, the steel wire structure can improve the elasticity and the automatic resilience performance of spliced pole to ensure that the outer jacket can recover fast after suffering external force.

Preferably, the steel wire structure includes first steel wire and the second steel wire that is Y type distribution, and wherein the partly that first steel wire stretches into the oversheath is straight thorn portion, and the partly that the second steel wire stretches into the oversheath is crook portion, and the direction that the spliced pole inclines is pointed to straight thorn portion, and crook portion deviates from the direction that the spliced pole inclines. No matter which side of optical cable the mouse starts to gnaw, when gnawing to the steel wire structure, the straight thorn portion or the crotch portion can directly push against the tooth that touches the mouse or pierce the mouse oral cavity to play the effect that prevents the mouse and gnaw the optical cable.

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

Preferably, 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 which are uniformly distributed around the reinforced core are arranged in the buffer layer, and optical fibers are filled in the beam tube units.

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 embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a cross-sectional structural view of a fiber optic cable according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the outer sheath of the optical cable shown in FIG. 1;

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

fig. 4 is a schematic structural diagram of a biting state of an outer sheath in the optical cable shown in fig. 1;

fig. 5 is a schematic diagram of the deformed azimuth structure of each portion of the outer sheath in 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 reinforced core 9, a bundle pipe unit 10, an optical fiber 11, filling cotton I12, 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 back surface 42, a straight thorn portion 141 and a hook portion 151.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

Fig. 1 is a view showing an embodiment of the present invention, a fiber optic cable comprising an outer sheath, an inner sheath and a cable core assembly, wherein the inner sheath comprises an outermost polyethylene sheath 5, a middle armor layer 6 and an inner middle armor layer 6, and waterproof coatings are respectively disposed between the middle armor layer 6 and the polyethylene sheath 5 and the middle armor layer 6; the cable core assembly comprises a buffer layer 8, and a reinforced core 9 is arranged at the center of the buffer layer 8; inside the buffer layer 8 are arranged groups of tube units filled with optical fibers 11 distributed evenly around the core 9. The outer jacket in this embodiment is the bilayer structure who comprises oversheath 1 and inner sheath 2, and it can be through the deformation of self with impact force to one side skew, cushions the pressure that receives simultaneously to the cable core subassembly of protection inside is not influenced.

Specifically, the outer sheath 1 and the inner sheath 2 are connected through eight connecting columns 4 which are uniformly arranged, and a forming cavity 3 is formed between the adjacent connecting columns 4; the shape-changing cavity 3 is internally provided with filling cotton I12 and filling cotton II13, wherein the filling cotton I12 is positioned at the position attached to the outer sheath 1, the cement dry powder is uniformly dispersed in the filling cotton I12, and the filling cotton II13 is positioned at the position attached to the inner sheath 2, and the fire extinguishing powder is uniformly dispersed in the filling cotton II 13. As shown in fig. 1 and 2, the connecting column 4 is arranged in an inclined manner in a clockwise direction, the side surfaces of the connecting column 4 adjacent to the deformation cavity 3 are 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 at the connection position of the reverse surface 41 and the inner sheath 2) is less 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 inclined in a direction away from the reverse surface 41, so that the whole back surface 42 is in a shape of "7", based on the above structure, the width of the part of the connecting column 4 connected with the outer sheath 1 is greater than the width of the part connected with the inner sheath 2 in the embodiment. When outer sheath 1 top received external force, spliced pole 4 at first can further incline towards the incline direction, and this process, spliced pole 4 can disperse the external force received through drawing or extrusion rather than the part that links to each other to avoid the effect of external force to transmit inside and the destruction optic fibre of optical cable.

According to the above structure, the inner sheath can bear a certain extrusion force when the connecting column 4 extrudes the inner sheath 2 connected with the connecting column, and in order to reduce the influence of the extrusion force on the inner sheath, the embodiment provides that the inner sheath 2 and the inner sheath can be relatively deviated. Specifically, the inner sheath 2 is uniformly provided with limit holes 16, the periphery of the polyethylene sheath 5 of the inner sheath is provided with limit heads 17 inserted into the limit holes 16, oil storage ring grooves 18 are arranged at equal intervals along the length direction on the periphery of the polyethylene sheath 5, and the water blocking paste is stored in the oil storage ring grooves 18. As shown in fig. 2, since the width of the stopper 17 in the circumferential direction of the inner sheath 2 is smaller than the width of the stopper hole 16, the inner sheath 2 can be displaced relative to the inner sheath on the circumferential surface while being axially stabilized by the stopper hole 16 and the stopper 17. As shown in fig. 5, when the uppermost part of the outer sheath 1 is subjected to an external force F, the deformation state of the connecting column 4 is shown as that the upper part inclines towards the right side through analysis of the upper part of the optical cable, the lower part extrudes the inner sheath 2 against the inclination direction, when the connecting column 4 drives the part of the outer sheath 1 connected with the connecting column to move towards the clockwise direction, the connecting column 4 can also push the inner sheath 2 connected with the connecting column to move towards the opposite direction, meanwhile, the outer sheath on the lower part of the optical cable can also generate corresponding change, in the whole process, the inner sheath can change the transmission direction of the force in the inner sheath 2 through deviation, and the buffering capacity of the outer sheath can be further improved.

The optical cable is in the use except facing the foreign object striking, still can facing the risk that the mouse gnaw and sting, in this embodiment, based on the above-mentioned structural feature of outer jacket, through set up a plurality of groups of steel wire structures at equidistant along the length direction of optical cable in every spliced pole 4, can increase spliced pole 4's structural strength, improve its buffering effect and automatic resilience performance. In addition, the structure of the steel wire can be designed to resist the gnawing of mice. Specifically, the steel wire structure includes 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 is 60 °, and a lower end thereof extends to the inner sheath 2. As shown in fig. 4, the upper end of the first steel wire 14 extends into the outer sheath 1 along the direction of the reverse surface 41 and extends into the part of the straight thorn portion 141, and the upper end of the second steel wire 15 extends into the outer sheath 1 along the reverse surface 42 and extends into a part of the hook portion 151. Based on the tooth and oral cavity characteristics according to the mouse, it can begin to gnaw from one side of optical cable, but no matter which side of optical cable the mouse begins to gnaw from, when gnawing to the steel wire structure, spur portion 141 or crotch portion 151 can directly push against the tooth of mouse or pierce the mouse oral cavity to play the effect that prevents the mouse to gnaw the optical cable. In addition, when gnawing to the filling cotton I12, the cement dry powder in the filling cotton I12 is adhered to the oral cavity or the esophagus of the rat, which can also play a role in preventing the rat from continuing to gnawing.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good 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 good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an optical cable, includes outer jacket, interior sheath and cable core subassembly, its characterized in that: the outer protective layer comprises an outer protective sleeve and an inner protective sleeve, the outer protective sleeve and the inner protective sleeve are connected through uniformly arranged connecting columns, and a forming cavity is formed between every two adjacent connecting columns; the spliced pole sets up according to same direction slope, and its both sides are the falling face and the dorsad respectively, and wherein the contained angle between falling face and the inner sheath is less than 45, and the dorsad is close to partly parallel with the falling face of inner sheath, and partly towards the direction slope that deviates from the falling face of oversheath near the partly of oversheath to make the width of the part that the spliced pole is connected the oversheath be greater than the width of the part of connecting the inner sheath.

2. The optical cable of claim 1, wherein: evenly set up spacing hole on the sheath including, the periphery setting of sheath including inserts the spacing head in spacing hole, and the width that the width of spacing head is less than the width in spacing hole on the circumferencial direction of sheath including, the inner sheath can take place relative displacement with the inner sheath under spacing hole and spacing first restriction simultaneously.

3. The optical 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 the water-blocking paste is stored in the oil storage ring grooves.

4. The optical cable of 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 optical cable of claim 4, wherein: still set up the cotton II that packs in the deformation chamber, homodisperse powder of putting out a fire in the cotton II that packs, wherein cotton I that packs is located the one side of laminating oversheath, and cotton II that packs is located the one side of laminating the inner sheath.

6. The optical 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 end part of each steel wire structure extends to the inner sheath, and the outer end part of each steel wire structure extends to the inside of the outer sheath.

7. The optical cable of claim 6, wherein: the steel wire structure is including being first steel wire and the second steel wire of Y type distribution, and wherein the partly of oversheath is stretched into to first steel wire is straight thorn portion, and the partly of oversheath is stretched into to the second steel wire is crook portion, and the directional direction that the spliced pole inclines of straight thorn portion, and crook portion deviates from the direction that the spliced pole inclines.

8. The optical cable of claim 4, wherein: the inner sheath comprises an outermost polyethylene sheath, an armor layer at the middle part and an armor layer at the middle part inside, and waterproof covering layers are respectively arranged between the armor layer at the middle part and the armor layers at the polyethylene sheath and the middle part.

9. The optical 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 which are uniformly distributed around the reinforced core are arranged in the buffer layer, and optical fibers are filled in the beam tube units.