CN113885148B - Skeleton cable - Google Patents

Abstract

The invention belongs to the technical field of communication cables, and particularly relates to a skeleton cable, wherein the core structure of the skeleton cable is an inner sheath, and the inner sheath comprises a middle sheath and an inner sheath; the middle protective sleeve is movably connected with the inner protective sleeve through a middle binding structural layer; the middle binding structural layer comprises a limiting ring, supporting rings and fixing rings, wherein the fixing rings are fixedly connected with the inner sheath, the supporting rings are distributed between two adjacent fixing rings at equal intervals and fixedly connected with the inner sheath, and the limiting rings are distributed on two sides of the fixing rings and fixedly connected with the middle sheath. The middle sheath and the inner sheath are arranged inside the framework cable and are connected through the middle connection structural layer, the middle connection structural layer is connected with the limiting ring fixedly connected with the middle sheath and the fixing ring and the supporting ring fixedly connected with the inner sheath, the maximum length deformation difference between the middle sheath and the inner sheath is limited by the fixing ring and the supporting ring, when the cable is pulled, the inner sheath slightly creeps under the action of the supporting ring, and therefore the influence of the pulling force on the cable core can be reduced.

Description

Skeleton cable

Technical Field

The invention belongs to the technical field of communication cables, and particularly relates to a framework cable.

Background

When the optical cable is cabled, two protection requirements are provided for the optical fiber: firstly, the optical fiber is less stressed, and secondly, the optical fiber needs to be waterproof. The optical fiber is required to be less stressed, the influence of tension and pressure on the optical fiber is mainly reduced, and at present, the tensile strength of each protective layer in the optical cable is usually improved by increasing a steel strand, so that the influence of the tension on the internal optical fiber is avoided. However, the weight of the optical cable is increased sharply while increasing the number of the steel strands, which affects not only the laying of the optical cable but also the tensile strength of the optical cable in a reverse direction, and in addition, increasing the tensile strength of the optical cable by increasing the number of the steel strands causes the diameter of the optical cable to be increased, resulting in an increase in cost.

Disclosure of Invention

The invention aims to provide a skeletal cable, wherein a middle sheath and an inner sheath are arranged inside the skeletal cable and are connected with each other through an intermediate structural layer, the intermediate structural layer is connected with a limiting ring fixedly connected with the middle sheath and a fixing ring and a supporting ring fixedly connected with the inner sheath, the fixing ring and the supporting ring limit maximum length deformation difference between the middle sheath and the inner sheath, and when the cable is subjected to tension, the inner sheath slightly creeps under the action of the supporting ring, so that the influence of the tension on a cable core can be reduced.

In order to achieve the purpose, the invention provides the following technical scheme: the framework cable structurally comprises an outer sheath, a middle protective layer, an inner protective layer and a cable core assembly from outside to inside in sequence. The inner sheath comprises a middle sheath and an inner sheath, wherein the middle sheath is a thermoplastic layer and is fixedly wrapped by the middle sheath and the outer sheath in sequence to form an outer protective layer, the inner sheath is fixedly wrapped by the cable core assembly, and the inner sheath and the cable core assembly form a peristaltic layer; the middle sheath is movably connected with the inner sheath through a middle binding structural layer, so that the inner sheath can move relative to the middle sheath; the middle binding structural layer comprises a plurality of limiting rings, a plurality of supporting rings and a plurality of fixing rings, wherein the fixing rings are distributed at equal intervals along the length direction of the framework cable and fixedly connected with the inner sheath, the supporting rings are distributed between two adjacent fixing rings at equal intervals and fixedly connected with the inner sheath, the thickness of each fixing ring is larger than that of each supporting ring, the limiting rings are distributed on two sides of each fixing ring and fixedly connected with the middle sheath, and an elastic deformation structure is arranged between each limiting ring and each fixing ring; the middle protective sleeve is wrapped on the periphery of the middle structural layer, and a gap is reserved between the middle protective sleeve and the inner protective sleeve.

In the technical scheme, the middle connection structural layer is provided with the support ring and the fixing ring which are fixedly connected with the inner sheath, and the limiting ring which is fixedly connected with the middle sheath, in the framework cable, the support ring supports the middle sheath to prevent the middle sheath from deforming, and the whole framework cable is basically guaranteed. When the framework cable is subjected to tensile force or extrusion force in the length direction (caused by bending), the length of the middle sheath changes, the middle sheath has a larger deformation degree in the first deformation stage, and the outer sheath, the middle protective layer and the like can participate in deformation and share the tensile force applied to the middle sheath in the deformation process, so that the deformation amount of the middle sheath in the second stage is very small; in the first stage, because the support ring is not fixedly connected with the middle sheath, when the middle sheath deforms, the inner sheath does not deform synchronously with the middle sheath, but slightly creeps under the action of the support ring, and if the external force is not large, the external force hardly influences the inner sheath; if external force is bigger, when the sheath takes place the deformation of second stage in the messenger, the spacing ring extrudees elastic deformation structure towards solid fixed ring, because solid fixed ring fixed connection inner sheath, gu fixed ring can produce slight removal or motionless along with the inner sheath this moment, but this moment, the effect of external force to the inner sheath is very little, and the inner sheath is out of shape in the deformation range that can bear, consequently can not lead to the fact the destruction to the cable core of inside.

Preferably, middle sheath includes waterproof covering, aramid fiber covering and steel strand layer from outside to inside in proper order, and waterproof covering can make this skeleton cable have certain waterproof performance, avoids inside water entering cable, and the steel strand layer both can increase the compressive strength of this skeleton cable, also can increase tensile strength.

Preferably, the cable core assembly comprises an outer support, an inner support and a cable core, wherein the outer support and the inner support are both annular, a gap is reserved between the outer support and the inner support, clamping grooves corresponding to the positions are respectively arranged on the outer wall of the inner support and the inner wall of the outer support, two sides of the cable core are respectively clamped in the clamping grooves, and in addition, ointment is filled in the reserved gap between the outer support and the inner support. The annular outer support and the annular inner support both have damping performance, the influence of vibration on the cable core is eliminated through micro deformation, and the factice filled between the outer support and the inner support can prevent water from entering the inside of the cable core assembly and contacting the cable core.

Preferably, the peripheral space of the fixing ring is sleeved with a film coating layer, the film coating layer is annular, the annular openings at two sides of the film coating layer are sleeved on the limiting rings at two sides of the fixing ring, and a distance is reserved between the film coating layer and the fixing ring; in the finished skeleton cable, the film coating layer and the middle sheath are integrated. The laminating layer covers the fixing ring, when the sheath is in thermoplastic processing, the laminating layer and the middle sheath are integrated, the middle sheath in a hot melting state can keep a tubular shape, the thermoplastic material is prevented from collapsing between the limiting rings, and therefore the limiting rings can be guaranteed to move towards the direction of the fixing ring.

Preferably, an external connecting sleeve is sleeved on the periphery of the inner sheath, covers the support ring and is provided with a gap with the support ring; the edge of the two ends of the external connecting sleeve contacts with the limiting rings, and the external connecting sleeve is fixedly connected with the middle sheath in the finished product framework cable. The external sleeve covers the support rings, and when the sheath is subjected to thermoplastic processing, the external sleeve and the middle sheath are fused into a whole, so that the middle sheath in a hot melting state can keep a tubular shape, the thermoplastic material is prevented from collapsing between the support rings, and the support rings can be guaranteed to creep relative to the middle sheath.

Preferably, the elastic deformation structure comprises at least three contact heads, and deformation spaces are reserved among the contact heads; all contact heads evenly set up around the inner sheath to install on the spacing ring, when spacing ring extrusion contact head, the contact head is at first eliminated the effort of spacing ring through deformation, reduces the influence to solid fixed ring. In addition, when external force was eliminated, the contact recovers gradually, makes whole section skeleton cable inside resume original state, because there is the deformation space between the contact, consequently, the deformation of contact can not extrude well sheath or inner sheath.

Preferably, the limiting ring comprises a central ring, the central ring is composed of two half rings, splicing holes and splicing heads are respectively arranged at two ends of each half ring, the splicing heads on the two half rings are inserted into the splicing holes, and adhesive is smeared on contact surfaces at two ends; the face, close to the fixed ring, of the semi-ring is provided with a slot, the contact head comprises a deformation portion and a plug portion, and the plug portion is inserted into the slot. In production, the two half rings are butted and sleeved on the fixing ring, and then the middle sheath is produced, so that the production difficulty of the framework cable can be reduced.

Preferably, the limiting ring further comprises a front cover plate and a rear cover plate, and the outer diameters of the front cover plate and the rear cover plate are smaller than that of the central ring; the front cover plate is fixedly connected with one surface of the central ring, which is close to the fixing ring, avoidance holes which correspond to the slots one by one are formed in the front cover plate, and the contact head penetrates through the avoidance holes; the fixed one side of keeping away from solid fixed ring at the centre ring that sets up of back shroud. The front cover plate and the rear cover plate are fixedly connected with the center ring in a bonding mode, and the center ring formed by splicing can be reinforced. In addition, since the outer diameters of the front cover plate and the rear cover plate are smaller than that of the center ring, more parts of the center ring are embedded in the middle sheath when the middle sheath is processed, which can increase the connection strength between the middle sheath and the center ring.

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 schematic cross-sectional view of a skeletal cable according to an embodiment of the present invention;

FIG. 2 is a schematic plan view of the remaining portion of the skeletal cable of FIG. 1 after stripping of the intermediate jacket;

FIG. 3 is a schematic perspective view of the remaining portion of the skeletal cable shown in FIG. 2 after removal of a portion of the coating layer and the outer jacket;

FIG. 4 is a schematic view of a partially cut-away construction of the skeletal cable of FIG. 1;

FIG. 5 is a sectional plan view of a portion of the skeletal cable of FIG. 1;

FIG. 6 is a schematic view of the structure of the nipple shown in FIG. 2;

FIG. 7 is a schematic view of the spacing ring of FIG. 2 in a disassembled configuration;

FIG. 8 is a schematic view of the split configuration of the center ring within the retaining ring of FIG. 7;

fig. 9 is a sectional view of the contact in fig. 7.

In the figure, an outer sheath 1, a waterproof coating 2, an aramid fiber coating 3, a steel strand layer 4, a middle sheath 5, a middle connection structure layer 6, an inner sheath 7, a reinforcing rib 8, an outer bracket 9, an inner bracket 10, a cable core 11, factice 12, a limiting ring 13, a coating layer 14, an outer connecting sleeve 15, a support ring 16, a fixing ring 17, a contact 18, a center ring 131, an inserting groove 132, a convex strip 133, a front cover plate 134, a rear cover plate 135, an avoiding hole 136, a half ring 137, a splicing hole 138, a splicing head 139, an isolating ring 151, a broken seam 152, a hairline 153, a deformation part 181 and a plug part 182 are arranged.

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 to 9 show an embodiment of the present invention, which is a skeletal cable, and the structure of the skeletal cable sequentially includes, from outside to inside, an outer sheath 1, an intermediate sheath, an inner sheath, and a cable core assembly. Wherein the middle sheath layer comprises a waterproof covering layer 2, an aramid fiber covering layer 3 and a steel strand layer 4 from outside to inside in sequence.

The inner protective layer comprises a middle protective layer 5 and an inner protective layer 7, wherein the middle protective layer 5 is a thermoplastic layer which is fixedly wrapped by the middle protective layer and the outer protective layer 1 in sequence to form an outer protective layer; a reinforcing rib 8 is arranged in the inner sheath 7, the whole inner sheath 7 is fixedly wrapped with the cable core assembly, and the cable core assembly and the inner sheath form a creeping layer; the intermediate sheath 5 is movably connected to the inner sheath 7 by the intermediate binding structure 6, so that the inner sheath 7 can move relative to the intermediate sheath 5. Specifically, the middle binding structure layer 6 comprises a plurality of limiting rings 13, a plurality of supporting rings 16 and a plurality of fixing rings 17, wherein the fixing rings 17 are distributed at equal intervals along the length direction of the framework cable and fixedly connected with the inner sheath 7, the plurality of supporting rings 16 are distributed at equal intervals between two adjacent fixing rings 17 and fixedly connected with the inner sheath 7, the thickness of each fixing ring 17 is larger than that of each supporting ring 16, the limiting rings 13 are distributed on two sides of each fixing ring 17 and fixedly connected with the middle sheath 5, and an elastic deformation structure is arranged between each limiting ring 13 and each fixing ring 17; the middle protective sleeve 5 is wrapped on the periphery of the middle connecting structure layer 6 and is provided with a gap with the inner protective sleeve 7.

Based on the inner sheath with the structure, the middle binding structural layer 6 is provided with the supporting ring 16 and the fixing ring 17 which are fixedly connected with the inner sheath 7, and the limiting ring 13 which is fixedly connected with the middle sheath 5, in the framework cable, the supporting ring 16 supports the middle sheath 5 to prevent the middle sheath 5 from deforming, and the basic shape of the whole framework cable is ensured.

When the framework cable is subjected to tension in the length direction or internal pressure caused by bending, the length of the middle sheath 5 is changed, the middle sheath 5 has a larger deformation degree in the first deformation stage, and the outer sheath 1, the middle protective layer and the like can participate in deformation and share tension borne by the middle sheath 5 in the deformation process, so that the deformation of the middle sheath 5 in the second stage is very small; in the first stage, due to the non-fixed connection between the support ring 16 and the middle sheath 5, when the middle sheath 5 deforms, the inner sheath 7 does not deform synchronously with the middle sheath 5, but slightly creeps under the action of the support ring 16, and if the external force is not very large, the external force hardly affects the inner sheath 7; if external force is large, when the second-stage deformation of the middle sheath 5 occurs, the limiting ring 13 extrudes the elastic deformation structure towards the fixing ring 17, and the fixing ring 17 is fixedly connected with the inner sheath 7, so that the fixing ring 17 can slightly move or be fixed along with the inner sheath 7, but at the moment, the external force has small effect on the inner sheath 7, and the inner sheath 7 deforms in a bearable deformation range, so that the internal cable core 11 cannot be damaged.

In addition, the cable core assembly used in this embodiment includes an outer support 9, an inner support 10 and a cable core 11, wherein the outer support 9 and the inner support 10 are both annular, a gap is reserved between the outer support and the inner support, the outer wall of the inner support and the inner wall of the outer support are respectively provided with a clamping groove corresponding in position, two sides of the cable core 11 are respectively clamped in the clamping grooves, and in addition, an ointment 12 is filled in the reserved gap between the outer support 9 and the inner support 10. The annular outer support 9 and the annular inner support 10 both have damping properties, the influence of vibration on the cable core 11 is eliminated through micro-deformation, and the factice 12 filled between the outer support 9 and the inner support 10 can prevent water from entering the inside of the cable core assembly and contacting the cable core 11.

In this embodiment, in order to prevent the intermediate sheath 5 from partially collapsing during the thermoplastic processing, the fixing ring 17 and the support ring 16 are covered with the film layer 14 and the outer sleeve 15, respectively. The film coating layer 14 is annular, the annular openings at two sides of the film coating layer are sleeved on the limiting rings 13 at two sides of the fixing ring 17, and a distance is reserved between the film coating layer 14 and the fixing ring 1; in the finished skeleton cable, the film coating layer 14 and the middle sheath 5 are integrated, so that the middle sheath 5 in a hot melting state can keep a tubular shape, thermoplastic materials are effectively prevented from collapsing between the limiting rings 13, and the limiting rings 13 can move towards the direction of the fixing rings 17. A gap is reserved between the external connecting sleeve 15 and the supporting ring 16, and in actual production, two end edges of the external connecting sleeve 15 are in contact with the limiting ring 13. As shown in fig. 6, the outer connecting sleeve 15 is a tubular structure with a broken seam 152, and the whole outer connecting sleeve 15 can be sleeved on the periphery of the support ring 16 by enlarging and deforming the broken seam 152; in addition, a spacer ring 151 is arranged on the inner wall of the outer sleeve 15 and distributed across the support ring 16, and a napping pattern 153 is arranged on the outer periphery of the outer sleeve 15 to increase the bonding strength with the middle sheath 5. The external sleeve 15 covers the support rings 16, and during the thermoforming of the intermediate sheath 5, the external sleeve 15 and the intermediate sheath 5 are fused together, which makes it possible to maintain the intermediate sheath 5 in a tubular shape in the hot-melted state, preventing the thermoplastic material from collapsing between the support rings 16, and thus ensuring the support rings 16 to be able to creep with respect to the intermediate sheath 5.

In addition, the elastic deformation structure used in the present embodiment includes six contact heads 18, and a deformation space is reserved between the contact heads 18; all the contacts 18 are evenly arranged around the inner sheath 7 and are mounted on the stop collar 13. The above-mentioned spacing ring 13 includes a center ring 131, as shown in fig. 8, the center ring 131 is composed of two half rings 137, and a convex strip 133 is disposed on the periphery of the center ring 131 to increase the bonding strength between the center ring 13 and the middle sheath 5. Splicing holes 138 and splicing heads 139 are respectively arranged at two ends of the half rings 137, the splicing heads 139 on the two half rings 137 are inserted into the splicing holes 138, and adhesive is smeared on the contact surfaces at the two ends; in the half ring 137, a slot 132 is provided on a side thereof adjacent to the fixing ring 17, and as shown in fig. 9, the contact 18 includes a deformation portion 181 and a plug portion 182, wherein the plug portion 182 is inserted into the slot 132. When the stop collar 13 presses the contact 18, the contact 18 is deformed to eliminate the force of the stop collar 13, thereby reducing the influence on the fixing ring 17. In addition, when the external force is eliminated, the contact heads 18 are gradually restored to restore the inner part of the whole section of the skeleton cable to the original state, and the deformation of the contact heads 18 does not extrude the middle sheath 5 or the inner sheath 7 because of the deformation space between the contact heads 18.

The above-mentioned stop collar 1 formed by splicing the two half rings 137 may be broken at the spliced position, in order to increase the strength, the stop collar 13 further includes a front cover plate 134 and a rear cover plate 135, and the outer diameters of the front cover plate 134 and the rear cover plate 135 are smaller than the outer diameter of the center ring 131; the front cover plate 134 is fixedly connected to one surface of the central ring 131 close to the fixing ring 17, the front cover plate 134 is provided with avoiding holes 136 corresponding to the slots 132 one by one, and the contact head 18 penetrates through the avoiding holes 136; the rear cover plate 135 is fixedly disposed on a surface of the center ring 131 away from the fixing ring 17. The front cover plate 134 and the rear cover plate 135 are fixedly bonded to the center ring 131, which may reinforce the spliced center ring 131. In addition, since the outer diameters of the front and rear cover plates 134 and 135 are smaller than the outer diameter of the center ring 131, the center ring 131 is more partially embedded in the middle sheath 5 when the middle sheath 5 is manufactured, which can increase the coupling strength of the middle sheath 5 and the center ring 131.

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 phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in articles of commerce or systems including such elements.

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 (8)

1. The utility model provides a skeleton cable, its structure includes oversheath, middle sheath, interior sheath and cable core subassembly from outside to inside in proper order, its characterized in that: the inner sheath comprises a middle sheath and an inner sheath, wherein the middle sheath is a thermoplastic layer and is fixedly wrapped by the middle sheath and the outer sheath in sequence to form an outer protective layer, the inner sheath is fixedly wrapped by the cable core assembly, and the inner sheath and the cable core assembly form a peristaltic layer; the middle sheath is movably connected with the inner sheath through a middle binding structural layer, so that the inner sheath can move relative to the middle sheath; the middle binding structure layer comprises a plurality of limiting rings, a plurality of supporting rings and a plurality of fixing rings, wherein the fixing rings are distributed at equal intervals along the length direction of the framework cable and fixedly connected with the inner sheath; the middle protective sleeve is wrapped on the periphery of the middle structural layer, and a gap is reserved between the middle protective sleeve and the inner protective sleeve.

2. A skeletal cable as claimed in claim 1, wherein: the middle protective layer sequentially comprises a waterproof covering layer, an aramid covering layer and a steel strand layer from outside to inside.

3. A skeletal cable as claimed in claim 1, wherein: the cable core component comprises an outer support, an inner support and a cable core, wherein the outer support and the inner support are annular, a gap is reserved between the outer support and the inner support, clamping grooves corresponding to the outer support and the inner support are respectively arranged on the outer wall of the inner support and the inner wall of the outer support, two sides of the cable core are respectively clamped in the clamping grooves, and ointment is filled in the reserved gap between the outer support and the inner support.

4. A skeletal cable as claimed in claim 1, wherein: sleeving a film coating layer in the peripheral space of the fixing ring, wherein the film coating layer is annular, annular openings on two sides of the film coating layer are sleeved on limiting rings on two sides of the fixing ring, and a distance is reserved between the film coating layer and the fixing ring; in the finished skeleton cable, the film coating layer and the middle sheath are integrated.

5. A skeletal cable as claimed in claim 1, wherein: an external sleeve is sleeved on the periphery of the inner sheath, covers the support ring and is provided with a gap with the support ring; the edge of the two ends of the external connecting sleeve contacts with the limiting rings, and the external connecting sleeve is fixedly connected with the middle sheath in the finished product framework cable.

6. A skeletal cable as claimed in any of claims 1 to 5, wherein: the elastic deformation structure comprises at least three contact heads, and deformation spaces are reserved among the contact heads; all contacts evenly set up around the inner sheath to install on the spacing ring.

7. A skeletal cable as claimed in claim 6, wherein: the limiting ring comprises a central ring, the central ring consists of two half rings, splicing holes and splicing heads are respectively arranged at two ends of the half rings, the splicing heads on the two half rings are inserted into the splicing holes, and adhesive is coated on contact surfaces at two ends; the face of the semi-ring close to the fixing ring is provided with a slot, the contact head comprises a deformation part and a plug part, and the plug part is inserted into the slot.

8. A skeletal cable as claimed in claim 7, wherein: the limiting ring also comprises a front cover plate and a rear cover plate, and the outer diameters of the front cover plate and the rear cover plate are smaller than that of the central ring; the front cover plate is fixedly connected with one surface of the central ring close to the fixing ring, avoidance holes corresponding to the slots one to one are formed in the front cover plate, and the contact heads penetrate through the avoidance holes; the fixed one side that keeps away from solid fixed ring at the centre ring that sets up of back shroud.

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