阅读说明：本技术 一种防开裂光缆及其中铠装层的生产工艺 (Anti-cracking optical cable and production process of armor layer in same ) 是由 常国庆 莫敏晖 宗俊臣 蒋淼 代庸 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种防开裂光缆及其中铠装层的生产工艺,涉及光纤光缆技术领域。提出了一种逻辑清晰、步骤有序、结构稳定且加工方便,可有效避免生产过程中钢塑复合带搭接处两层金属带相互错位,甚至开裂损毁的防开裂光缆及其中铠装层的生产工艺。包括缆芯,所述缆芯为普通束管型层绞式结构,或为带状束管型层绞式结构；所述缆芯的间隙出填充有阻水材料,所述阻水材料为填充式或半干式结构；所述缆芯外纵包轧纹钢塑复合带形成铠装层,所述轧纹钢塑复合带的搭接处通过热熔胶相粘黏；所述铠装层外包裹有外护套。可以借助热熔胶保证光缆扭转时轧纹钢塑复合带搭接处不会相互错位产生剪切力造成外护套层开裂,具有结构稳定、加工方便等优点。(The invention discloses an anti-cracking optical cable and a production process of an armor layer in the anti-cracking optical cable, and relates to the technical field of optical fiber cables. The anti-cracking optical cable and the production process of the armor layer thereof have the advantages of clear logic, ordered steps, stable structure and convenient processing, and can effectively avoid mutual dislocation of two metal bands at the lap joint of the steel-plastic composite band in the production process, even cracking damage. The cable comprises a cable core, wherein the cable core is of a common beam tube type layer stranded structure or a band-shaped beam tube type layer stranded structure; a gap of the cable core is filled with a water-blocking material, and the water-blocking material is of a filling type or semi-dry type structure; the cable core is longitudinally wrapped with embossed steel-plastic composite tapes to form an armor layer, and the lap joints of the embossed steel-plastic composite tapes are adhered through hot melt adhesive; the armor layer is wrapped with an outer sheath. The overlapping parts of the embossed steel-plastic composite belt can not be staggered mutually to generate shearing force to cause cracking of the outer sheath layer when the optical cable is twisted by means of the hot melt adhesive, and the corrugated steel-plastic composite belt has the advantages of stable structure, convenience in processing and the like.)

1. An anti-cracking optical cable is characterized by comprising a cable core (3), wherein the cable core (3) is of a common beam tube type layer stranded structure or a ribbon beam tube type layer stranded structure; a water blocking material (4) is filled in a gap of the cable core (3), and the water blocking material (4) is of a filling type or semi-dry type structure; the cable core (3) is longitudinally wrapped with embossed steel-plastic composite tapes to form an armor layer (2), and the lap joints of the embossed steel-plastic composite tapes are adhered through hot melt adhesives (1); an outer sheath (5) is wrapped outside the armor layer (2).

2. The optical cable of claim 1, wherein the core is a ribbon structure core or a conventional layer stranded structure core.

3. The anti-cracking optical cable according to claim 2, wherein the cable core (3) comprises a central reinforcement and a plurality of loose tubes, the central reinforcement is wrapped with a plastic covering layer, the loose tubes are distributed around the central reinforcement, optical fiber bundles are arranged in the loose tubes in a penetrating manner, and water-blocking fiber paste is filled in the loose tubes.

4. An anti-cracking optical cable according to claim 2, characterized in that the cable core (3) comprises a central reinforcement and a plurality of loose tubes distributed around the central reinforcement, the loose tubes are provided with optical fiber ribbons in a penetrating manner and filled with water-blocking fiber paste.

5. The optical cable as claimed in claim 1 or 2, wherein the water-blocking material is a filling type water-blocking paste, or a semi-dry type water-blocking tape or yarn.

6. An anti-crack optical cable according to claim 1 or 2, characterized in that the thickness of the embossed steel-plastic composite strip base band can be 0.12mm, 0.15mm, 0.2mm or 0.25 mm.

7. A process for producing an armor layer in an anti-cracking optical cable according to claim 1, wherein the embossed steel-plastic composite tape is guided by a curling die, so that two sides of the embossed steel-plastic composite tape are curled into circular arcs, and the two sides of the embossed steel-plastic composite tape are curled and then overlapped;

the overlapping part of the embossed steel-plastic composite belt is coated with hot melt adhesive (1) by a hot melt adhesive gun, so that the overlapping part is firmly adhered to one piece, and finally, the armor layer (2) is formed after cooling.

8. The process for producing an armor layer of a crack-resistant optical cable according to claim 7, wherein the hot-melt glue gun is installed on a six-dimensional adjusting device, the coating position is positioned by the six-dimensional adjusting device, the six-dimensional adjustment of the coating position is realized, and the coating gun can rotate by 360 degrees in each dimension;

six-dimensional adjusting device is including controlling guide rail (11), upper and lower guide rail (12) and front and back guide rail (13), control guide rail (11) level setting, and its both ends fixed connection on the workstation, upper and lower guide rail (12) vertical setting, and its bottom are connected on controlling guide rail (11) through roating seat detachable, front and back guide rail (13) level setting, and its middle part connect on upper and lower guide rail (12) through roating seat two detachable, the hot melt adhesive rifle is connected on front and back guide rail (13) through roating seat three detachable.

9. The process for producing the armor layer in the anti-cracking optical cable according to claim 7, wherein the hot melt glue gun comprises a gun head seat and a gun head mechanism (10);

the gun head mechanism (10) comprises a glue melting gun head limiting clamp (101), a hot melt gun head inner cylinder (102), a spring (103), a high-temperature-resistant sealing ring (104), a connecting screw cap (105) and a hot melt gun head outer sleeve (106); the hot melt adhesive gun head inner cylinder (102) is fixedly connected to the gun head seat through a connecting nut (105), and a side port of the hot melt adhesive gun head inner cylinder is communicated with an outlet of the gun head seat; the glue melting gun head limiting clamp (101) is C-shaped, and one side of the glue melting gun head limiting clamp is fixedly connected to the gun head seat; the hot melt adhesive gun head outer sleeve (106) is sleeved at one side port of the hot melt adhesive gun head inner cylinder (102) far away from the gun head seat, a limiting flange is arranged on the outer wall of the hot melt adhesive gun head outer sleeve (106), and the limiting flange is positioned on the inner side of the hot melt adhesive gun head limiting clamp (101); the spring (103) is sleeved with the hot melt adhesive gun head inner cylinder (102) and abuts between the connecting nut (105) and the hot melt adhesive gun head outer sleeve (106), so that the limiting flange abuts against the hot melt adhesive gun head limiting clamp (101) when no external force exists; a clamping groove is formed in the outer wall of the hot melt adhesive gun head inner cylinder (102), and the high-temperature-resistant sealing ring (104) is arranged in the clamping groove, so that the hot melt adhesive gun head inner cylinder (102) and the hot melt adhesive gun head outer sleeve (106) are kept sealed; and one side of the hot melt adhesive gun head outer sleeve (106) far away from the hot melt adhesive gun head inner cylinder (102) is provided with an adhesive outlet which is rectangular.

Technical Field

The invention relates to the technical field of optical fiber cables, in particular to an embossed steel-plastic composite tape longitudinally-wrapped armored anti-cracking optical cable and a sheath production process thereof.

Background

With the great force of 5G network construction, the application of optical fiber ribbon cables and common layer-stranded large-core-number cables is gradually increased. Although the embossing longitudinal-covering armor process of the steel-plastic composite belt is widely applied in China, when the outer diameter of the optical cable is larger, the optical cable produced by adopting the conventional embossing longitudinal-covering process of the steel-plastic composite belt has the defects that two layers of metal belts at the lap joint of the steel-plastic composite belt are mutually staggered due to too many times of repeated torsion in the construction process, so that repeated shearing force is formed, and the outer sheath at the lap joint is easy to crack.

Disclosure of Invention

Aiming at the problems, the invention provides the anti-cracking optical cable which has clear logic, ordered steps, stable structure and convenient processing, and can effectively avoid the mutual dislocation of two metal bands at the lap joint of the steel-plastic composite band in the production process, even the cracking damage, and the production process of the armor layer in the anti-cracking optical cable.

The technical scheme of the invention is as follows: the cable comprises a cable core 3, wherein the cable core 3 is of a common beam tube type layer stranded structure or a belt-shaped beam tube type layer stranded structure; a water blocking material 4 is filled in a gap of the cable core 3, and the water blocking material 4 is of a filling type or semi-dry type structure; the cable core 3 is longitudinally wrapped with embossed steel-plastic composite tapes to form an armor layer 2, and the lap joints of the embossed steel-plastic composite tapes are adhered through hot melt adhesives 1; the armor layer 2 is wrapped by an outer sheath 5.

The cable core can be an optical fiber band structure cable core and can also be a common layer stranded structure cable core.

The cable core 3 includes central reinforcement and many pine sleeves, the outer parcel of central reinforcement has the cover to mould the layer, many the pine sleeve distributes around central reinforcement, wear to be equipped with the optical fiber bundle in the pine sleeve, just fill the fine cream that blocks water in the pine sleeve.

The cable core 3 includes central reinforcement and many pine sleeve pipes, many the pine sleeve pipe distributes around central reinforcement, wear to be equipped with the optical fiber ribbon in the pine sleeve pipe, just fill the fine cream that blocks water in the pine sleeve pipe.

The water-blocking material can be filled water-blocking cable paste, and can also be semi-dry water-blocking tape and water-blocking yarn.

The thickness of the embossed steel-plastic composite belt base belt can be 0.12mm, 0.15mm, 0.2mm or 0.25 mm.

Guiding the embossed steel-plastic composite strip through a curling die, curling two sides of the embossed steel-plastic composite strip into circular arcs, and lapping the two sides of the embossed steel-plastic composite strip after curling;

the overlapping part of the embossed steel-plastic composite belt is coated with hot melt adhesive 1 by a hot melt adhesive gun, so that the overlapping part is firmly adhered together, and finally, the armor layer 2 is formed after cooling.

The hot melt glue gun is arranged on the six-dimensional adjusting device, and the coating position is positioned through the six-dimensional adjusting device;

six-dimensional adjusting device is including controlling guide rail 11, upper and lower guide rail 12 and front and back guide rail 13, control 11 level settings of guide rail, and its both ends fixed connection on the workstation, upper and lower guide rail 12 is vertical to be set up, and its bottom is connected on left and right sides guide rail 11 through a roating seat detachable, front and back guide rail 13 level settings, and its middle part is connected on upper and lower guide rail 12 through two detachable of roating seat, the hot melt adhesive rifle is connected on front and back guide rail 13 through three detachable of roating seat.

The hot melt glue gun comprises a gun head seat and a gun head mechanism 10;

the gun head mechanism 10 comprises a melt adhesive gun head limiting clamp 101, a melt adhesive gun head inner cylinder 102, a spring 103, a high-temperature-resistant sealing ring 104, a connecting nut 105 and a melt adhesive gun head outer sleeve 106; the hot melt adhesive gun head inner cylinder 102 is fixedly connected to the gun head seat through a connecting nut 105, and a side port of the hot melt adhesive gun head inner cylinder is communicated with an outlet of the gun head seat; the glue melting gun head limiting clamp 101 is C-shaped, and one side of the glue melting gun head limiting clamp is fixedly connected to the gun head seat; the hot melt adhesive gun head outer sleeve 106 is sleeved at the port of one side of the hot melt adhesive gun head inner cylinder 102 far away from the gun head seat, and a limiting flange is arranged on the outer wall of the hot melt adhesive gun head outer sleeve 106 and is positioned at the inner side of the hot melt adhesive gun head limiting clamp 101; the spring 103 is sleeved with the hot melt adhesive gun head inner cylinder 102 and abuts between the connecting nut 105 and the hot melt adhesive gun head outer sleeve 106, so that the limiting flange abuts against the hot melt adhesive gun head limiting clamp 101 when no external force exists; a clamping groove is formed in the outer wall of the hot melt adhesive gun head inner cylinder 102, and the high-temperature-resistant sealing ring 104 is arranged in the clamping groove, so that the hot melt adhesive gun head inner cylinder 102 and the hot melt adhesive gun head outer sleeve 106 are kept sealed; one side of the hot melt adhesive gun head outer sleeve 106, which is far away from the hot melt adhesive gun head inner cylinder 102, is provided with an adhesive outlet, and the adhesive outlet is rectangular.

In the cable structure, the overlapping parts of the embossed steel-plastic composite belts can be prevented from being mutually staggered to generate shearing force to cause cracking of the outer sheath layer when the optical cable is twisted by means of the hot melt adhesive, and the cable structure has the advantages of stable structure, convenience in processing and the like. Meanwhile, the embossing steel-plastic composite belt is guided by the curling die, so that two sides of the embossing steel-plastic composite belt are curled into circular arcs, and the surface of a lap joint is round and smooth after longitudinal wrapping forming; coating hot melt adhesive by using a hot melt adhesive gun to ensure that the two layers at the lap joint enable the steel-plastic composite belt to be round, smooth and non-warping, thereby forming a round embossing steel-plastic composite belt armor layer; has the advantages of clear logic, ordered steps and the like.

Drawings

Figure 1 is a schematic cross-sectional view of a cable with a cable core of a common layer-stranding structure,

figure 2 is a schematic cross-sectional view of a cable with a cable core having a fiber optic ribbon structure,

figure 3 is a schematic structural view of a crimping die,

figure 4 is a left side view of figure 3,

figure 5 is a schematic view of the structure of the six-dimensional adjusting device,

figure 6 is a right side view of figure 5,

figure 7 is a schematic view of the construction of the hot melt gun,

figure 8 is a part construction view of the hot melt gun,

FIG. 9 is a schematic view of a prior art hot melt glue gun;

in the figure, 1 is hot melt adhesive, 2 is an armor layer, 3 is a cable core, 4 is a water-blocking material, and 5 is an outer sheath;

11 is a left and right guide rail, 12 is an upper and lower guide rail, and 13 is a front and rear guide rail;

10 is a gun head mechanism, 101 is a melt adhesive gun head limit clamp, 102 is a melt adhesive gun head inner cylinder, 103 is a spring, 104 is a high-temperature resistant sealing ring, 105 is a connecting nut, and 106 is a melt adhesive gun head outer sleeve.

Detailed Description

In order to clearly explain the technical features of the present patent, the following detailed description of the present patent is provided in conjunction with the accompanying drawings.

The invention is shown in figures 1-8, which comprises a cable core 3, wherein the cable core 3 is in a common beam tube type layer stranded structure or a band beam tube type layer stranded structure; a water blocking material 4 is filled in a gap of the cable core 3, and the water blocking material 4 is of a filling type or semi-dry type structure; the cable core 3 is longitudinally wrapped with embossed steel-plastic composite tapes to form an armor layer 2, and the lap joints of the embossed steel-plastic composite tapes are adhered through hot melt adhesives 1; the armor layer 2 is wrapped by an outer sheath 5. Therefore, the overlapping parts of the embossed steel-plastic composite belts can not be staggered to generate shearing force to cause cracking of the outer sheath layer when the optical cable is twisted by means of the hot melt adhesive.

The cable core can be an optical fiber band structure cable core and can also be a common layer stranded structure cable core.

As shown in fig. 1, the cable core 3 includes central reinforcement and many pine sleeves, the outer parcel of central reinforcement has the cover to mould the layer, many the pine sleeve distributes around central reinforcement, wear to be equipped with the fiber bundle in the pine sleeve, just fill the fine cream that blocks water in the pine sleeve.

As shown in fig. 2, the cable core 3 includes a central reinforcement and a plurality of loose tubes, and the loose tubes are distributed around the central reinforcement, and an optical fiber ribbon is arranged in the loose tubes in a penetrating manner, and a water-blocking fiber paste is filled in the loose tubes.

The water-blocking material can be filled water-blocking cable paste, and can also be semi-dry water-blocking tape and water-blocking yarn.

The thickness of the embossed steel-plastic composite belt base belt can be 0.12mm, 0.15mm, 0.2mm or 0.25 mm.

Guiding the embossed steel-plastic composite strip through a curling die, so that two sides of the embossed steel-plastic composite strip are curled into circular arcs, the surface of a lap joint is round and smooth after longitudinal wrapping forming, and the two sides of the embossed steel-plastic composite strip are curled and then overlapped;

the overlapping part of the embossed steel-plastic composite belt is coated with hot melt adhesive 1 by a hot melt adhesive gun, so that the overlapping part is firmly adhered to one piece, and finally, the steel-plastic composite belt is formed into an armor layer 2 after being cooled, namely, the steel-plastic composite belt is round, smooth and non-warping at the overlapping part to form a round embossed steel-plastic composite belt armor layer.

The curling die is made of wear-resistant alloy materials, and is fixed before the steel-plastic composite belt is preformed, the outlet of the die is designed to be in an arc shape, so that the metal belt is conveniently formed.

As shown in fig. 5 to 6, the hot melt glue gun is installed on a six-dimensional adjusting device, and the coating position is positioned by the six-dimensional adjusting device;

six-dimensional adjusting device is including controlling guide rail 11, upper and lower guide rail 12 and front and back guide rail 13, control 11 level settings of guide rail, and its both ends fixed connection on the workstation, upper and lower guide rail 12 is vertical to be set up, and its bottom is connected on left and right sides guide rail 11 through a roating seat detachable, front and back guide rail 13 level settings, and its middle part is connected on upper and lower guide rail 12 through two detachable of roating seat, the hot melt adhesive rifle is connected on front and back guide rail 13 through three detachable of roating seat. Thereby the position of 6 dimensionalities of the front, the back, the left, the right, the upper and the lower parts of the gun head can be adjusted, and 360 degrees can be realized^°And rotation is carried out, and finally the hot melt adhesive can be stably coated on the lap joint of the steel-plastic composite belt.

Currently, most of the existing hot melt adhesive gun head mechanisms are illustrated in fig. 9 and generally comprise: the nut and the gun head are connected. The end face of the gun head is a plane, and the glue outlet hole is a circular hole. The hot melt adhesive discharged from the gun head is linear, the thickness of a coating surface is large, the width is insufficient, the gun head cannot be automatically adjusted up and down along with the fluctuation of a coated object, the coating is not uniform easily, and the coating quality of the hot melt adhesive is influenced. The existing gun head easily causes unstable bonding quality of the hot melt adhesive. The hot melt adhesive gun head comprises a hot melt adhesive gun head body, a hot melt adhesive gun head and a control device.

As shown in fig. 7-8, the hot melt glue gun comprises a gun head seat and a gun head mechanism 10;

the gun head mechanism 10 comprises a melt adhesive gun head limiting clamp 101, a melt adhesive gun head inner cylinder 102, a spring 103, a high-temperature-resistant sealing ring 104, a connecting nut 105 and a melt adhesive gun head outer sleeve 106; the hot melt adhesive gun head inner cylinder 102 is fixedly connected to the gun head seat through a connecting nut 105, and a side port of the hot melt adhesive gun head inner cylinder is communicated with an outlet of the gun head seat; the glue melting gun head limiting clamp 101 is C-shaped, and one side of the glue melting gun head limiting clamp is fixedly connected to the gun head seat; the hot melt adhesive gun head outer sleeve 106 is sleeved at the port of one side of the hot melt adhesive gun head inner cylinder 102 far away from the gun head seat, and a limiting flange is arranged on the outer wall of the hot melt adhesive gun head outer sleeve 106 and is positioned at the inner side of the hot melt adhesive gun head limiting clamp 101; the spring 103 is sleeved with the hot melt adhesive gun head inner cylinder 102 and abuts between the connecting nut 105 and the hot melt adhesive gun head outer sleeve 106, so that the limiting flange abuts against the hot melt adhesive gun head limiting clamp 101 when no external force exists; a clamping groove is formed in the outer wall of the hot melt adhesive gun head inner cylinder 102, and the high-temperature-resistant sealing ring 104 is arranged in the clamping groove, so that the hot melt adhesive gun head inner cylinder 102 and the hot melt adhesive gun head outer sleeve 106 are kept sealed; one side of the hot melt adhesive gun head outer sleeve 106, which is far away from the hot melt adhesive gun head inner cylinder 102, is provided with an adhesive outlet, and the adhesive outlet is rectangular.

The hot melt adhesive gun head adopts a novel design: and firstly, a spring and a limiting structure are added, and the performance of the spring is utilized to automatically adjust the vertical displacement of the gun head along with the vertical fluctuation of the embossed steel-plastic composite belt, so that the gun head is tightly attached to the steel-plastic composite belt.

And the glue outlet of the gun head is adjusted to be a rectangular hole by a round hole, the size of the rectangular hole can be automatically adjusted according to the coating requirement, and the hot melt glue coming out of the glue outlet forms a plane with continuous coating width and uniform thickness on the surface of the steel-plastic composite belt, so that the problem of large thickness and insufficient width of the hot melt glue coating surface is solved.

The hot melt adhesive gun head limit card 101 has the following features: the high-temperature-resistant antirust metal material is adopted, so that the steel has enough rigidity and is not easy to deform and high-temperature oxidation; one end of the hot melt adhesive machine gun head seat is provided with a hole and is fixedly connected with the hot melt adhesive machine gun head seat; the other end of the hot melt adhesive gun head sleeve comprises a limiting device, so that the stroke range of the hot melt adhesive gun head sleeve is limited, and the gun head sleeve is ensured to have enough telescopic stroke and cannot fall off; the shape of the defining structure may be circular, semi-circular or part-circular.

The hot melt adhesive gun head inner barrel 102 has the following characteristics: adopting a high-temperature resistant antirust metal material; the hollow structure is used as a hot melt adhesive channel; one end of the hot melt adhesive machine gun head seat is fixedly connected with the hot melt adhesive machine gun head seat; the other end is turned with a clamping groove of a high-temperature resistant sealing ring.

The spring 103 has the following features: the elastic force is enough so as to adjust the stroke of the gun head outer sleeve; is arranged outside the inner cylinder of the hot melt adhesive gun head.

The high temperature resistant seal ring 104 has the following features: the gap between the inner cylinder and the gun head outer sleeve is sealed to prevent glue leakage; and the clamping groove is arranged on the inner cylinder of the hot melt adhesive gun head.

The coupling nut 105 has the following features: and a high-temperature-resistant antirust metal material is adopted for connecting and fixing the gun head mechanism and the gun head seat of the hot melt adhesive machine.

The hot melt adhesive gun head cover 106 has the following features: adopting a high-temperature resistant antirust metal material; a limiting flange is arranged at the top end; the bottom is provided with a rectangular glue outlet.

The assembled novel hot melt adhesive gun head, as shown in fig. 7, has the following characteristics:

firstly, an outer sleeve of the hot melt adhesive gun head is contacted with a coated object, and the distance is adjusted to enable a spring to keep corresponding elasticity;

secondly, the rectangular glue outlet holes in the outer sleeve 106 of the hot melt glue gun head ensure the width of the coating surface and reduce the thickness of the coating surface;

thirdly, the high-temperature-resistant sealing ring effectively seals a gap between the inner cylinder and the gun head outer sleeve and prevents hot melt adhesive from seeping out of the middle;

fourthly, when the coated object shakes downwards, the outer sleeve of the hot melt adhesive gun head 106 is driven to move downwards by utilizing the self elasticity of the spring 103, and the gun head is kept from being separated from the outer sleeve;

fifthly, when the coated object jumps upwards, the hot melt adhesive gun head outer sleeve 106 is forced to move upwards, so that the spring 103 is extruded to generate elastic force, the jumping amplitude of the coated object is weakened, and the coated object is always kept in contact with the coated object and is not separated from the coated object;

and sixthly, after the work is finished, the gun head outer sleeve moves downwards under the action of the spring and the gravity of the gun head outer sleeve, and the moving stroke is limited by the hot melt adhesive gun head limit clamp, so that the gun head outer sleeve is prevented from falling off.

While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.