CN115508965B - A direct buried optical cable with an early warning reminder structure - Google Patents

Abstract

The application discloses a direct-buried optical cable with an early warning and reminding structure, which is applied to the field of optical cables, wherein iron oxide powder is filled in a cavity formed between an outer rubber sleeve and a middle rubber sleeve, and a lead-out opening communicated with the cavity is uniformly arranged on the outer end wall of the outer rubber sleeve, so that when the optical cable is buried underground, the iron oxide powder filled in the cavity can be outwards diffused into surrounding soil through the lead-out opening, the soil around the optical cable is dyed into rust red, so that workers can judge the position of the optical cable by observing the color of the soil, the optical cable can be effectively prevented from being directly dug off in the subsequent excavation process of other constructions, the warning protection of the optical cable is realized to a certain extent, meanwhile, the existence of the ferric oxide powder can also form an electromagnetic interference shielding layer outside the optical cable, and the stability of the optical cable in the use process is further improved.

Description

A direct buried optical cable with an early warning reminder structure

Technical Field

The present application relates to the field of optical cables, and in particular to a direct buried optical cable with an early warning reminder structure.

Background Art

Optical cable is a commonly used cable component in information communication today. It uses one or more optical fibers placed in a sheath as a transmission medium and can be used individually or in groups to transmit information. The optical cable in the prior art is mainly composed of optical fibers (glass fibers as thin as hair) and plastic protective sheaths and plastic outer skins.

In the prior art, when optical cables are used as long-distance transmission components, in order to ensure the stability of signal transmission inside the optical cables and prevent the optical cables from being easily affected by the external environment after installation, the optical cables are usually buried in the ground soil. This installation method is a common means of laying optical cables in the prior art. However, after the optical cables are buried in the ground, although corresponding warning signs are set on the ground, the depth of the buried optical cables cannot usually be warned. In the subsequent construction and excavation process, it is difficult for construction workers to clearly know the location of the buried optical cables. This makes it easy to break the optical cables during the excavation process, resulting in interruption of communication transmission, which in turn causes serious consequences.

To this end, we propose a direct buried optical cable with an early warning reminder structure to solve some of the problems existing in the above-mentioned prior art. Based on the position of the optical cable, early warning reminders are given to relevant excavation personnel, thereby avoiding the excavation construction on the optical cable causing the optical cable to be cut.

Summary of the invention

The present application aims to provide an optical cable which changes the color of the soil around it after being laid, so as to provide an early warning reminder of the position of the optical cable and avoid accidentally digging the optical cable during excavation construction. Compared with the prior art, a direct buried optical cable with an early warning reminder structure is provided, comprising a plurality of optical fibers arranged side by side, the outer sides of the optical fibers are collectively sheathed with a loose tube, the interior of the loose tube is filled with fiber paste wrapped around the outer sides of the plurality of optical fibers, the outer side of the fiber paste is sheathed with a middle rubber sleeve, and the outer side of the middle rubber sleeve is sheathed with an outer rubber sleeve, a cavity with a cylindrical structure is constructed between the outer rubber sleeve and the middle rubber sleeve, and the interior of the cavity is filled with iron oxide powder, a plurality of lead-out ports connected to the interior of the cavity are evenly opened on the outer end wall of the outer rubber sleeve, a biodegradable plate is fixedly packaged inside each lead-out port, iron oxide powder is filled in the cavity formed between the outer rubber sleeve and the middle rubber sleeve, and the lead-out ports connected to the cavity are evenly opened on the outer end wall of the outer rubber sleeve, so that when the optical cable is buried underground, the iron oxide powder filled in the cavity can diffuse outwardly into the surrounding soil through the lead-out ports.

Actively dyeing the soil around the cable installation location helps workers determine the location of the optical cable by observing the soil color, which can effectively avoid directly cutting the optical cable during subsequent construction excavation, and to a certain extent achieves warning protection for the optical cable.

Optionally, the outer side of the loose sleeve is fixedly sleeved with an inner rubber sleeve, and the outer side of the inner rubber sleeve is fixedly sleeved with a stainless steel sleeve arranged inside the middle rubber sleeve. Further, by installing the stainless steel sleeve made of metal material on the inner side of the middle rubber sleeve, the internal structure of the optical cable can be supported, protected and connected as a whole, which is beneficial to improving the internal structural stability of the device. By respectively arranging the inner rubber sleeve and the middle rubber sleeve on the inner and outer sides of the stainless steel sleeve, the stainless steel sleeve is insulated and protected, which is beneficial to reducing the probability of accidental conduction of the stainless steel sleeve, and can effectively reduce the probability of the internal optical fiber being affected by accidental conduction of the stainless steel sleeve.

Optionally, annular grooves arranged in an interlaced manner are evenly opened on the outer end walls on both sides of the inner and outer sides of the stainless steel casing along the axial direction thereof, and a film is fixedly wrapped on the outer surface of the stainless steel casing. Further, multiple annular grooves are opened in sequence on the inner and outer end walls of the stainless steel casing along the axial direction thereof, and the annular grooves on both sides are arranged as an interlaced structure, so that the cross-section of the stainless steel casing along the axial direction thereof presents a corrugated structure. When the optical cable is bent, the grooves at relative positions on the stainless steel casing are squeezed or stretched to deform, thereby increasing the deformability of the stainless steel casing and avoiding the inconvenience of bending the optical cable due to the presence of the metal stainless steel casing.

Optionally, iron oxide powder is filled in the cavity to form an iron oxide powder layer with a cylindrical structure, and the interior of the cavity is also filled with water-absorbent resin particles a. The water-absorbent resin particles a are filled in the cavity to form a water-absorbent resin layer also with a cylindrical structure, and the water-absorbent resin layer is arranged inside the iron oxide powder layer. Further, by filling water-absorbent resin particles a in the cavity and arranging the water-absorbent resin layer formed by the water-absorbent resin particles a on the inner side of the iron oxide powder layer formed by the iron oxide powder, the water-absorbent resin particles a are pushed outward with the help of the expansion support of the iron oxide powder after absorbing water, thereby providing active support for the diffusion of the water-absorbent resin particles a, which is beneficial to improving the efficiency of the iron oxide powder diffusing into the surrounding soil, and to a certain extent improving the timeliness of the warning response after the optical cable is buried underground.

Optionally, a water-permeable membrane is provided between the water-absorbent resin layer and the iron oxide powder layer to prevent the iron oxide powder and the water-absorbent resin particles a from blending with each other. By further providing the water-permeable membrane between the water-absorbent resin layer and the iron oxide powder layer, the iron oxide powder and the water-absorbent resin particles a in two different layers are isolated. While ensuring that moisture can enter the water-absorbent resin layer normally, it effectively prevents the iron oxide powder from mixing between the water-absorbent resin particles a when the water-absorbent resin particles a expand outward, thereby reducing the probability of the iron oxide powder remaining inside the cavity, thereby effectively ensuring the working stability of the device.

Optionally, a plurality of partitions a with circular structures are evenly distributed inside the cavity along its axial direction, and the inner and outer end walls of the partitions a are respectively fixedly connected to the outer end wall of the central rubber sleeve and the inner end wall of the outer rubber sleeve, and the cavity is divided into a plurality of independent spaces by the plurality of partitions a. The cavity is further divided into a plurality of independent spaces by evenly distributing a plurality of partitions a with circular structures inside the cavity along the axial direction, which is beneficial to intermittently partition the iron oxide powder layer composed of the iron oxide powder, thereby preventing the iron oxide powder and water-absorbing resin particles a filled in the cavity from completely leaking out when the optical cable is intercepted and used, thereby effectively ensuring the convenient and flexible interception and use of the optical cable.

Optionally, a plurality of rubber connectors are distributed around the interior of each independent space, and the shape of the rubber connector is set to be a cylindrical structure, and the two ends of the rubber connector are respectively fixedly connected to the outer end wall of the central rubber sleeve and the inner end wall of the outer rubber sleeve. Further, by evenly distributing the plurality of rubber connectors around each independent space, with the help of the connection of the plurality of rubber connectors, it is beneficial to ensure that the connection between the central rubber sleeve and the outer rubber sleeve is firm and tight, and avoid the outer rubber sleeve from bulging outward after the water-absorbing resin particles a absorb water and expand, and to a certain extent ensure the stability of the iron oxide powder being extruded outward from the guide outlet after the water-absorbing resin particles a absorb water and expand.

Optionally, gypsum powder arranged on the outside of the film is filled between the stainless steel sleeve and the middle rubber sleeve. By further filling the gypsum powder between the stainless steel sleeve and the middle rubber sleeve, after the metal of the middle rubber sleeve is broken, the ruptured position can be sealed by virtue of the property of the gypsum powder solidifying after coming into contact with water, thereby ensuring the internal waterproofness of the device to a certain extent. At the same time, by fixing the film on the outside of the stainless steel sleeve and setting the gypsum powder on the outside of the film, the gypsum powder is prevented from being filled into the annular groove on the outer end wall of the stainless steel sleeve, which is beneficial to ensuring the stability of the bending and deformation performance of the stainless steel sleeve through the annular groove.

Optionally, a plurality of partitions b with circular structures are sequentially inlaid inside the gypsum powder along the direction of the optical fiber, the inner end wall of the partition b is fixedly connected to the outer end wall of the stainless steel sleeve, and the outer end wall of the partition b is fixedly connected to the inner end wall of the middle rubber sleeve. Furthermore, by sequentially fixing a plurality of partitions b between the stainless steel sleeve and the middle rubber sleeve along the direction of the optical fiber, the gypsum powder filled between the stainless steel sleeve and the middle rubber sleeve is blocked by intervals, thereby preventing the gypsum powder from completely leaking outwards during the interception process of the device, and effectively ensuring the flexibility of use of the device.

Optionally, the interior of the fiber paste is uniformly filled with water-absorbent resin particles b of different sizes, and the shape of the water-absorbent resin particles b is set to a spherical structure. By further filling the water-absorbent resin particles b of different sizes inside the fiber paste, the dryness of the fiber paste is effectively guaranteed, and with the support of the water-absorbent resin particles b, the relative independence of multiple optical fibers is guaranteed, and the optical fibers are prevented from moving and sticking together due to the melting of the fiber paste in a high temperature environment. To a certain extent, the anti-interference performance of the optical fiber inside the optical cable during operation is improved, and by setting the water-absorbent resin particles b to a spherical structure of different sizes, it is beneficial to improve the fullness and comprehensiveness of their filling inside the fiber paste.

Compared with the prior art, the advantages of this application are:

(1) By filling the cavity formed between the outer rubber sleeve and the middle rubber sleeve with iron oxide powder, and evenly opening the outlet connected to the cavity on the outer end wall of the outer rubber sleeve, when the optical cable is buried underground, the iron oxide powder filled in the cavity can diffuse outwardly into the surrounding soil through the outlet, dyeing the soil around the optical cable into rust red, which is beneficial for workers to determine the position of the optical cable by observing the soil color, and can effectively avoid directly digging up the optical cable during other subsequent construction and excavation processes, thus achieving warning protection for the optical cable to a certain extent. At the same time, by fixing and embedding a decomposable biodegradable board inside the outlet, the leakage of iron oxide powder when the device is not in use can be avoided, and the outlet of iron oxide powder can be triggered by the underground environment, effectively improving the flexibility and stability of the device during installation and use. The presence of iron oxide powder can also form an electromagnetic interference shielding layer on the outside of the optical cable, further improving the stability of the optical cable during use.

(2) By installing a stainless steel sleeve made of metal material on the inner side of the middle rubber sleeve, the internal structure of the optical cable can be supported, protected and connected as a whole, which is beneficial to improving the stability of the internal structure of the device. At the same time, by arranging the inner rubber sleeve and the middle rubber sleeve on the inner and outer sides of the stainless steel sleeve respectively, the stainless steel sleeve can be insulated and protected, which is beneficial to reducing the probability of accidental conduction of the stainless steel sleeve, and can effectively reduce the probability of the stainless steel sleeve affecting the internal optical fiber after accidental conduction.

(3) A plurality of annular grooves are sequentially opened on the inner and outer end walls of the stainless steel casing along the axial direction, and the annular grooves on both sides are arranged to be staggered structures, so that the cross-section of the stainless steel casing along the axial direction thereof presents a corrugated structure. When the optical cable is bent, the grooves at the relative positions on the stainless steel casing are squeezed or stretched to increase the degree of deformation of the stainless steel casing, thereby avoiding the inconvenience of bending the optical cable due to the presence of the metal stainless steel casing.

(4) By filling the cavity with water-absorbing resin particles a and arranging the water-absorbing resin layer composed of the water-absorbing resin particles a on the inner side of the iron oxide powder layer composed of the iron oxide powder, the water-absorbing resin particles a can be pushed outward with the help of the expansion support of the iron oxide powder after absorbing water, thereby providing active support for the diffusion of the water-absorbing resin particles a, which is beneficial to improving the efficiency of the iron oxide powder diffusing into the surrounding soil, and to a certain extent improving the timeliness of the warning response after the optical cable is buried underground.

(5) By setting the water-permeable membrane between the water-absorbent resin layer and the iron oxide powder layer, the iron oxide powder and the water-absorbent resin particles a in two different layers can be isolated. While ensuring that moisture can enter the water-absorbent resin layer normally, it is effectively prevented that the iron oxide powder is mixed between the water-absorbent resin particles a when the water-absorbent resin particles a expand outward, thereby reducing the probability of the iron oxide powder remaining in the cavity, and effectively ensuring the working stability of the device.

(6) By evenly distributing a plurality of circular ring-shaped partitions a in the cavity along the axial direction, the cavity can be divided into a plurality of independent spaces, which is conducive to intermittently partitioning the iron oxide powder layer composed of iron oxide powder, thereby preventing the iron oxide powder and water-absorbing resin particles a filled in the cavity from completely leaking out when the optical cable is cut and used, thereby effectively ensuring the convenient and flexible cutting and use of the optical cable.

(7) By evenly distributing a plurality of rubber connectors in each independent space, the connection between the plurality of rubber connectors is helpful to ensure that the connection between the central rubber sleeve and the outer rubber sleeve is firm and tight, and the outer rubber sleeve is prevented from bulging outward due to the swelling of the water-absorbing resin particles a. To a certain extent, the stability of the iron oxide powder being squeezed outward from the outlet after the water-absorbing resin particles a absorbs water and swells is ensured.

(8) By filling gypsum powder between the stainless steel sleeve and the middle rubber sleeve, after the metal of the middle rubber sleeve is broken, the ruptured position can be sealed by taking advantage of the property of the gypsum powder to solidify after contacting water, thereby effectively preventing external moisture from continuously entering the middle rubber sleeve through the gap during subsequent use, thereby ensuring the internal waterproofness of the device to a certain extent. At the same time, by fixing a film on the outside of the stainless steel sleeve and arranging the gypsum powder on the outside of the film, the gypsum powder is prevented from filling into the annular groove on the outer end wall of the stainless steel sleeve, which is beneficial to ensuring the stability of the bending deformation performance of the stainless steel sleeve through the annular groove.

(9) By fixing multiple partitions b in sequence between the stainless steel sleeve and the middle rubber sleeve along the direction of the optical fiber, the gypsum powder filled between the stainless steel sleeve and the middle rubber sleeve can be blocked to prevent the gypsum powder from completely leaking out during the interception process of the device, effectively ensuring the flexibility of use of the device.

(10) By filling the fiber paste with water-absorbent resin particles b of different sizes, the dryness of the fiber paste can be effectively guaranteed, and with the support of the water-absorbent resin particles b, the relative independence of multiple optical fibers can be guaranteed, and the optical fibers can be prevented from moving and sticking together due to the melting of the fiber paste in a high-temperature environment, which improves the anti-interference performance of the optical fibers in the optical cable during operation to a certain extent. By setting the water-absorbent resin particles b to spherical structures of different sizes, it is beneficial to improve the fullness of their filling in the fiber paste.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the working state of the present application;

FIG2 is a perspective view of the present application;

FIG3 is a front view of the present application;

FIG4 is a front cross-sectional view of the present application;

FIG5 is a schematic diagram of the structure of A in FIG4;

FIG6 is a top view of the present application;

FIG7 is a three-dimensional diagram of the structure of the present application without the iron oxide powder;

FIG8 is a three-dimensional diagram of the present application without the structure other than the gypsum powder;

FIG9 is a three-dimensional diagram of the present application without the structure other than the stainless steel casing;

FIG. 10 is a disassembled diagram of the fiber paste and water-absorbing resin particles b of the present application.

Description of the numbers in the figure:

1. Optical fiber; 101. Loose tube; 102. Fiber paste; 103. Inner rubber sleeve; 104. Stainless steel sleeve; 105. Middle rubber sleeve; 2. Outer rubber sleeve; 201. Iron oxide powder; 202. Lead outlet; 203. Biodegradable board; 204. Water-absorbent resin particles a; 205. Water-permeable membrane; 206. Partition a; 207. Rubber connector; 3. Gypsum powder; 301. Partition b; 4. Water-absorbent resin particles b.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

Embodiment 1:

The present application discloses a direct buried optical cable with an early warning reminder structure. Please refer to Figures 1 to 10. The outer side of the optical fiber 1 is collectively sleeved with a loose tube 101. The interior of the loose tube 101 is filled with a fiber paste 102 wrapped around the outer side of multiple strands of optical fibers 1. The outer side of the fiber paste 102 is sleeved with a middle rubber sleeve 105, and the outer side of the middle rubber sleeve 105 is sleeved with an outer rubber sleeve 2.

A cylindrical cavity is constructed between the outer rubber sleeve 2 and the middle rubber sleeve 105, and the interior of the cavity is filled with iron oxide powder 201. A plurality of outlets 202 connected to the interior of the cavity are evenly arranged on the outer end wall of the outer rubber sleeve 2, and a biodegradable plate 203 is fixedly encapsulated inside each outlet 202.

When the optical cable is being laid and installed, the outer side of the outer rubber sheath 2 is also wrapped with a waterproof film. Before laying, the waterproof film wrapped on the outer side of the outer rubber sheath 2 needs to be torn off. The existence of the waterproof film on the outer side of the outer rubber sheath 2 can provide simple protection for the optical cable when it is in use, so as to prevent the biodegradable plate 203 inside the outlet 202 from being corroded and decomposed, thereby preventing the iron oxide powder 201 filled in the cavity from leaking in advance. During the laying process, the relevant staff excavated a trench required for the installation of the optical cable in the underground, and then the staff tore off the waterproof film wrapped on the outer surface of the optical cable and directly laid the optical cable inside the trench. , and the sealing and covering operation is performed, the optical cable is directly buried in the ground soil. After the installation and laying is completed, the biodegradable board 203 inside the outlet 202 on the outer rubber sleeve 2 of the optical cable is in direct contact with the underground moist soil. After the optical cable is laid below the ground for a period of time, the biodegradable board 203 is corroded and decomposed by the humid environment in the soil and microorganisms and breaks, which makes the outlet 202 in an open state. Affected by the movement of water molecules in the underground moist environment and the diffusion movement of substances, the iron oxide powder 201 filled in the cavity is diffused and discharged outward through the opened outlet 202.

The iron oxide powder 201 enters the soil covering the optical cable, and the iron oxide powder 201 diffuses into the soil, making the soil appear rusty red. The longer the optical cable is buried in the soil, the wider the range of the iron oxide powder 201 diffusion. If construction and excavation are carried out on the optical cable at a later time, the workers can judge the distance between the construction position and the optical cable by observing the color change of the soil during the excavation process, thereby avoiding directly digging up the optical cable during the excavation construction.

By filling the cavity formed between the outer rubber sleeve 2 and the middle rubber sleeve 105 with iron oxide powder 201, and evenly opening the outlet 202 connected to the cavity on the outer end wall of the outer rubber sleeve 2, when the optical cable is buried underground, the iron oxide powder 201 filled in the cavity can diffuse outward into the surrounding soil through the outlet 202, dyeing the soil around the optical cable into rust red, which is beneficial for the staff to determine the position of the optical cable by observing the soil color, and can effectively avoid directly digging up the optical cable during other subsequent construction and excavation processes, and to a certain extent achieve warning protection for the optical cable. At the same time, by fixing and embedding the decomposable biodegradable board 203 inside the outlet 202, the leakage of the iron oxide powder 201 when the device is not in use can be avoided, and the outlet of the iron oxide powder 201 can be triggered by the underground environment, which effectively improves the flexibility and stability of the device during installation and use. The presence of the iron oxide powder 201 can also form an electromagnetic interference shielding layer on the outside of the optical cable, further improving the stability of the optical cable during use.

Please refer to Figures 1 to 6. The iron oxide powder 201 is filled in the cavity to form an iron oxide powder layer with a cylindrical structure. The cavity is also filled with water-absorbent resin particles a204. The water-absorbent resin particles a204 are filled in the cavity to form a water-absorbent resin layer with the same cylindrical structure. The water-absorbent resin layer is arranged inside the iron oxide powder layer. When the optical cable is working, the optical cable is buried underground. The moisture in the soil around the optical cable laying position gradually penetrates into the cavity through the opened outlet 202. The water-absorbent resin particles a204 located in the cavity absorb moisture and expand. Since the water-absorbent resin layer formed by the water-absorbent resin particles a204 is arranged on the inner side of the iron oxide powder layer formed by the iron oxide powder 201, the water-absorbent resin particles a204 support the iron oxide powder 201 from the inside to the outside after absorbing water and expanding, thereby accelerating the efficiency of the iron oxide powder 201 diffusing to the surrounding soil through the outlet 202.

By filling the cavity with water-absorbent resin particles a204 and arranging the water-absorbent resin layer formed by the water-absorbent resin particles a204 on the inner side of the iron oxide powder layer formed by the iron oxide powder 201, with the help of the expansion support of the iron oxide powder 201 after absorbing water, the water-absorbent resin particles a204 can be pushed outward, providing active support for the diffusion of the water-absorbent resin particles a204, which is beneficial to improving the efficiency of the iron oxide powder 201 diffusing into the surrounding soil, and to a certain extent improves the timeliness of the warning response after the optical cable is buried underground.

Please refer to Figures 1, 2 and 5. A water-permeable membrane 205 is also provided between the water-absorbent resin layer and the iron oxide powder layer to prevent the iron oxide powder 201 and the water-absorbent resin particles a204 from blending with each other. When the optical cable is working, the iron oxide powder 201 and the water-absorbent resin particles a204 in two different layers can be isolated by providing the water-permeable membrane 205 between the water-absorbent resin layer and the iron oxide powder layer. While ensuring that moisture can enter the water-absorbent resin layer normally, it effectively avoids the iron oxide powder 201 from mixing between the water-absorbent resin particles a204 when the water-absorbent resin particles a204 expand outward, thereby reducing the probability of the iron oxide powder 201 remaining inside the cavity, thereby effectively ensuring the working stability of the device.

Please refer to Figures 5 and 7. There are multiple circular ring-shaped partitions a206 evenly distributed inside the cavity along its axial direction. The inner and outer end walls of the partition a206 are respectively fixedly connected to the outer end wall of the central rubber sleeve 105 and the inner end wall of the outer rubber sleeve 2. The cavity is divided into multiple independent spaces by multiple partitions a206. When the optical cable is working, the cavity can be divided into multiple independent spaces by evenly distributing multiple circular ring-shaped partitions a206 inside the cavity along the axial direction, which is beneficial to intermittently cut off the iron oxide powder layer composed of iron oxide powder 201, so as to avoid complete leakage of the iron oxide powder 201 and water-absorbing resin particles a204 filled in the cavity when the optical cable is intercepted and used, thereby effectively ensuring the convenient and flexible interception and use of the optical cable.

Please refer to Figures 6 and 7. Multiple rubber connectors 207 are distributed around each independent space. The shape of the rubber connector 207 is set to a cylindrical structure. The two ends of the rubber connector 207 are respectively fixedly connected to the outer end wall of the central rubber sleeve 105 and the inner end wall of the outer rubber sleeve 2. When the optical cable is working, by evenly distributing multiple rubber connectors 207 around each independent space, with the help of the connection of multiple rubber connectors 207, it is beneficial to ensure that the connection between the central rubber sleeve 105 and the outer rubber sleeve 2 is firm and tight, and the outer rubber sleeve 2 is prevented from bulging outwards due to the water-absorbing resin particles a204 absorbing water and swelling, and to a certain extent, the stability of the iron oxide powder 201 being squeezed outward from the guide outlet 202 after the water-absorbing resin particles a204 absorb water and swell.

Embodiment 2:

The components identical or corresponding to those in Example 1 are marked with the same reference numerals as those in Example 1. For the sake of simplicity, only the differences from Example 1 are described below. The differences between Example 2 and Example 1 are as follows:

The present application discloses a direct buried optical cable with an early warning reminder structure, please refer to Figures 1 to 10, the outer side of the loose tube 101 is fixedly sleeved with an inner rubber sleeve 103, and the outer side of the inner rubber sleeve 103 is fixedly sleeved with a stainless steel sleeve 104 arranged inside a central rubber sleeve 105. When the optical cable is working, by installing the stainless steel sleeve 104 made of metal material on the inner side of the central rubber sleeve 105, the internal structure of the optical cable can be supported, protected and connected as a whole, which is beneficial to improving the stability of the internal structure of the device. At the same time, by respectively arranging the inner rubber sleeve 103 and the central rubber sleeve 105 on the inner and outer sides of the stainless steel sleeve 104, the stainless steel sleeve 104 can be insulated and protected, which is beneficial to reducing the probability of accidental conduction of the stainless steel sleeve 104, and can effectively reduce the probability of the stainless steel sleeve 104 affecting the internal optical fiber 1 after accidental conduction.

Please refer to Figures 5 and 9. The outer end walls on both sides of the stainless steel sleeve 104 are evenly provided with mutually staggered annular grooves along the axial direction thereof. A film is fixedly wrapped on the outer surface of the stainless steel sleeve 104. When the optical cable is working, a plurality of annular grooves are sequentially provided on the inner and outer end walls of the stainless steel sleeve 104 along the axial direction thereof, and the annular grooves on both sides are arranged as mutually staggered structures, so that the cross-section of the stainless steel sleeve 104 along the axial direction thereof presents a corrugated structure. When the optical cable is bent, the grooves at the relative positions on the stainless steel sleeve 104 are squeezed or stretched to deform, thereby increasing the deformability of the stainless steel sleeve 104 and avoiding the inconvenience of bending the optical cable due to the presence of the stainless steel sleeve 104 made of metal.

Please refer to Figures 1, 2 and 5. The stainless steel sleeve 104 and the middle rubber sleeve 105 are filled with gypsum powder 3 arranged on the outside of the film. When the optical cable is working, if the middle rubber sleeve 105 is broken and external moisture enters through the crack, the gypsum powder 3 filled between the stainless steel sleeve 104 and the middle rubber sleeve 105 will solidify after contacting with water. By filling the gypsum powder 3 between the stainless steel sleeve 104 and the middle rubber sleeve 105, the ruptured position can be sealed by virtue of the property of the gypsum powder 3 solidifying after encountering water after the metal of the middle rubber sleeve 105 is broken, effectively preventing external moisture from continuously entering the middle rubber sleeve 105 from the gap during subsequent use, thereby ensuring the internal waterproofness of the device to a certain extent. At the same time, by fixing the film on the outside of the stainless steel sleeve 104 and arranging the gypsum powder 3 on the outside of the film, the gypsum powder 3 is prevented from being filled into the annular groove on the outer end wall of the stainless steel sleeve 104, which is conducive to ensuring that the stainless steel sleeve 104 improves the stability of its bending deformation performance through the annular groove.

Please refer to Figures 5 and 8. The interior of the gypsum powder 3 is sequentially inlaid with a plurality of partitions b301 with a circular structure along the direction of the optical fiber 1. The inner end wall of the partition b301 is fixedly connected to the outer end wall of the stainless steel sleeve 104, and the outer end wall of the partition b301 is fixedly connected to the inner end wall of the middle rubber sleeve 105. When the optical cable is working, by sequentially fixing a plurality of partitions b301 between the stainless steel sleeve 104 and the middle rubber sleeve 105 along the direction of the optical fiber 1, the gypsum powder 3 filled between the stainless steel sleeve 104 and the middle rubber sleeve 105 can be blocked at intervals, thereby preventing the gypsum powder 3 from completely leaking out during the interception process of the device, thereby effectively ensuring the flexibility of use of the device.

Please refer to Figures 5 and 10. The interior of the fiber paste 102 is uniformly filled with water-absorbent resin particles b4 of different sizes, and the shape of the water-absorbent resin particles b4 is set to a spherical structure. When the optical cable is working, by filling the interior of the fiber paste 102 with water-absorbent resin particles b4 of different sizes, the dryness of the fiber paste 102 can be effectively guaranteed, and with the support of the water-absorbent resin particles b4, the relative independence of multiple optical fibers 1 can be guaranteed, and the optical fibers 1 are prevented from moving and sticking together due to the melting of the fiber paste 102 in a high temperature environment, which improves the anti-interference performance of the optical fibers 1 in the working process of the optical cable to a certain extent. By setting the water-absorbent resin particles b4 to a spherical structure of different sizes, it is beneficial to improve the fullness and comprehensiveness of their filling in the fiber paste 102.

The above are only preferred specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and improved ideas of the present application, which should be covered by the protection scope of the present application.

Claims (6)

1. A direct buried optical cable with an early warning structure, comprising a plurality of optical fibers (1) arranged side by side, characterized in that a loose tube (101) is commonly sleeved on the outer sides of the optical fibers (1), the interior of the loose tube (101) is filled with a fiber paste (102) wrapped around the outer sides of the plurality of optical fibers (1), a middle rubber sleeve (105) is sleeved on the outer side of the fiber paste (102), and an outer rubber sleeve (2) is sleeved on the outer side of the middle rubber sleeve (105); A cylindrical cavity is constructed between the outer rubber sleeve (2) and the middle rubber sleeve (105), and the interior of the cavity is filled with iron oxide powder (201); a plurality of outlets (202) in communication with the interior of the cavity are evenly arranged on the outer end wall of the outer rubber sleeve (2), and a biodegradable plate (203) is fixedly encapsulated inside each of the outlets (202); The iron oxide powder (201) is an iron oxide powder layer filled in the cavity to form a cylindrical structure. The cavity is also filled with water-absorbing resin particles a (204). The water-absorbing resin particles a (204) are filled in the cavity to form a water-absorbing resin layer also having a cylindrical structure. The water-absorbing resin layer is arranged inside the iron oxide powder layer. A water permeable membrane (205) is also provided between the water-absorbing resin layer and the iron oxide powder layer to prevent the iron oxide powder (201) and the water-absorbing resin particles a (204) from blending with each other; a plurality of partitions a (206) of annular structure are evenly distributed inside the cavity along its axial direction; the inner and outer end walls of the partitions a (206) are respectively fixedly connected to the outer end wall of the middle rubber sleeve (105) and the inner end wall of the outer rubber sleeve (2); the cavity is divided into a plurality of independent spaces by the plurality of partitions a (206); a plurality of rubber connectors (207) are distributed around each of the independent spaces; the outer shape of the rubber connectors (207) is set to be a cylindrical structure; the two ends of the rubber connectors (207) are respectively fixedly connected to the outer end wall of the middle rubber sleeve (105) and the inner end wall of the outer rubber sleeve (2). 2. A direct buried optical cable with an early warning structure according to claim 1, characterized in that an inner rubber sleeve (103) is fixedly sleeved on the outer side of the loose sleeve (101), and a stainless steel sleeve (104) arranged inside the middle rubber sleeve (105) is fixedly sleeved on the outer side of the inner rubber sleeve (103). 3. According to claim 2, a direct buried optical cable with an early warning reminder structure is characterized in that annular grooves arranged in an interlaced manner are evenly opened on the outer end walls on both sides of the inner and outer sides of the stainless steel casing (104) along its axial direction, and a film is fixedly wrapped on the outer surface of the stainless steel casing (104). 4. A direct buried optical cable with an early warning structure according to claim 3, characterized in that the space between the stainless steel sleeve (104) and the middle rubber sleeve (105) is filled with gypsum powder (3) arranged on the outside of the film. 5. A direct buried optical cable with an early warning structure according to claim 4, characterized in that a plurality of partitions b (301) with a circular structure are sequentially inlaid inside the gypsum powder (3) along the direction of the optical fiber (1), the inner end wall of the partition b (301) is fixedly connected to the outer end wall of the stainless steel sleeve (104), and the outer end wall of the partition b (301) is fixedly connected to the inner end wall of the central rubber sleeve (105). 6. A direct buried optical cable with an early warning structure according to claim 1, characterized in that the interior of the fiber paste (102) is uniformly filled with water-absorbing resin particles b (4) of different sizes, and the shape of the water-absorbing resin particles b (4) is set to a spherical structure.