CN212084707U

CN212084707U - Weather-resistant buried communication cable

Info

Publication number: CN212084707U
Application number: CN202021093202.2U
Authority: CN
Inventors: 李琦; 陈万发
Original assignee: Beijing Chaoyang Longhua Wire And Cable Co ltd
Current assignee: Beijing Chaoyang Longhua Wire And Cable Co ltd
Priority date: 2020-06-13
Filing date: 2020-06-13
Publication date: 2020-12-04
Anticipated expiration: 2030-06-13

Abstract

The utility model discloses a bury formula communication cable weatherability, it relates to communication cable's technical field, when aiming at solving the cable among the prior art and laying in soil, the cable surface can receive water from soil, all kinds of chemical corrodes, the wearing and tearing of stereoplasm granule in soil etc. extremely are complicated and the great external acting force of harm nature, very easily cause the cable insulation impaired, the technical problem of the life of cable has been shortened, its technical scheme main points include a plurality of cable inner cores, still include from outside to inside in proper order the cladding wear-resisting restrictive coating, heat-resisting layer, corrosion-resisting layer and oxidation resisting layer, oxidation resisting layer is used for cladding a plurality of cable inner cores, be equipped with the antifriction separator that is used for a plurality of cable inner cores in the oxidation resisting layer, wear-resisting restrictive coating is the HNBR rubber layer, be equipped with the resistance to compression resilience layer between heat-resisting layer and the HNBR rubber layer; the communication cable has good weather resistance and compression resistance, the service life of the cable is prolonged, and the communication cable is safe and reliable.

Description

Weather-resistant buried communication cable

Technical Field

The utility model relates to a communication cable's technical field, more specifically say, it relates to a bury formula communication cable with weatherability.

Background

The communication cable is a cable for transmitting telephone, telegraph, facsimile document, television and radio program, data and other electric signals, and is a communication line composed of a core twisted by a plurality of mutually insulated wires or conductors and an outer sheath for protecting the core from moisture and mechanical damage.

At present, when some power equipment or power users are supplied with power, due to the limitation of construction time, construction conditions, construction requirements and other reasons, cables are often buried in soil for laying, but when the cables are laid in the soil, the surfaces of the cables are subjected to extremely complex and highly harmful external acting forces such as water, various chemical substance corrosion, biological erosion of various insects, mice and the like in the soil, abrasion of hard particles in the soil and the like, and in addition, the cables are also subjected to irregular impact force and large pressure from the ground surface, under the action of the acting forces, the insulation of the cables is extremely easily damaged, even faults of cable interruption are directly caused in serious cases, the normal operation of power supply operation is influenced, and the service life of the cables is shortened.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a bury formula communication cable with weatherability has good weatherability and compressive property, the effectual life who prolongs the cable, safe and reliable.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a bury formula communication cable with weatherability, includes a plurality of cable inner cores, its characterized in that: still include by outer to interior in proper order clad wear-resisting restrictive coating, heat-resistant layer, corrosion resistant layer and antioxidation layer, the antioxidation layer is used for a plurality of cable inner cores of cladding, be equipped with the antifriction separator who is used for a plurality of cable inner core in the antioxidation layer, wear-resisting restrictive coating is the HNBR rubber layer, be equipped with the resistance to compression resilience layer between heat-resistant layer and the HNBR rubber layer.

By adopting the technical scheme, the cable inner core comprises the wire core and the rubber insulating layer coated on the wire core, the rubber insulating layer is made of rubber, and the rubber is easily aged due to the fact that the rubber is in contact with air for a long time; the oxidation-resistant layer is used for coating the inner cores of the cables, so that the protection effect is achieved, the rubber insulating layer is prevented from being aged and damaged, and the phenomena of wire core contact with air and electric leakage can be effectively prevented; through the corrosion-resistant layer, the cable has good chemical resistance, and the corrosion phenomenon of the cable is avoided; utilize the heat-resistant layer for the cable has thermal-insulated effect, avoids the high temperature, influences cable transmission signal's stability.

When the cable is subjected to external extrusion force, the compression-resistant resilience layer is utilized, so that the pressure can be effectively buffered, and the cable is prevented from being damaged; the HNBR rubber has good wear resistance, heat resistance, high tearing performance and chemical corrosion resistance, and when the cable is buried in soil, the wear resistance of the wear-resistant sheath layer is good, so that the abrasion of hard particles in the soil to the outer wall of the cable is avoided; the communication cable formed by adopting the structure has good weather resistance and compression resistance, effectively prolongs the service life of the cable, and is safe and reliable.

Further, antifriction separator includes the back shaft, separates strip and the silica gel resistance to compression ring board of gluing on the oxidation resisting layer inner wall along a plurality of rubbers of back shaft circumference array, the longitudinal section of silica gel resistance to compression ring board is the polygon setting, and is a plurality of the one end that the back shaft was kept away from to rubber separation strip links to each other with the inner wall of silica gel resistance to compression ring board, and is adjacent it has the settling chamber that holds the cable inner core to enclose to close between the rubber separation strip.

Through adopting above-mentioned technical scheme, the combination of back shaft, rubber division strip and silica gel resistance to compression ring board for a plurality of cable inner cores are independent each other, play the divided effect to a plurality of cable inner cores, when can avoiding the cable to receive external force extrusion, a plurality of cable inner core looks mutual friction and impaired, have prolonged the life of cable, have improved the stability of cable transmission signal process.

Further, the layer is kick-backed in resistance to compression includes a plurality of rubber posts and follows a plurality of high elasticity rubber arc boards of heat-resisting layer circumference array, and is a plurality of high elasticity rubber arc board end to end, and is a plurality of the combination of high elasticity rubber arc board forms wave ring board, it is formed with a plurality of resilience buffer spaces to enclose to close between the inner ring wall on wave ring board and the outer wall on heat-resisting layer, the inner wall on HNBR rubber layer is equipped with the wave curved surface with wave ring board matched with, the rubber post is located resilience buffer space, the one end of rubber post links to each other with the outer wall on heat-resisting layer, the other end of rubber post links to each other with the inner wall of wave ring board.

Through adopting above-mentioned technical scheme, when the HNBR rubber layer received external pressure, deformation took place for high elasticity rubber arc board and rubber column, utilized the good elasticity of rubber column and high elasticity rubber arc board, can reset HNBR rubber layer, and then played the effect of protection to heat-resistant layer, corrosion-resistant layer, oxidation resisting layer and cable inner core, prevented that the cable inner core is impaired, safe and reliable avoids influencing the normal clear of power supply work, the effectual life who prolongs the cable.

Further, the inside of rubber column is cavity setting, be equipped with the spring in the rubber column, the flexible and axial syntropy of rubber column of spring.

Through adopting above-mentioned technical scheme, the elasticity of rubber post has further been strengthened in the setting of spring, and the spring has good buffering cushioning effect, can effectually cushion external pressure, has improved the compressive property of cable, has prolonged the life of cable.

Further, it is a plurality of the rubber column all is the calabash form setting, and is a plurality of the external diameter size of rubber column is decreased progressively to the direction of keeping away from the HNBR rubber layer by being close to heat-resisting layer.

Through adopting above-mentioned technical scheme, the external diameter size of rubber column is increased gradually to the direction of keeping away from the heat-resistant layer by being close to HNBR rubber layer, has increased the area of contact of rubber column and heat-resistant layer to when receiving external pressure, make the resilience that the rubber column can be stable.

Further, the heat resistant layer comprises at least one ceramic fiber felt layer.

Through adopting above-mentioned technical scheme, ceramic fiber has light in weight, high temperature resistant, adiabatic stability is good, the good heat conductivity of chemical stability is low grade advantage for the cable has good heat-resisting effect, avoids the cable high temperature, and the short circuit phenomenon appears, influences the normal clear of power supply work, has advanced the life of extension cable.

Further, the corrosion-resistant layer comprises a PSA high-temperature-resistant insulating felt layer adhesively connected against the inner wall of the refractory ceramic fiber felt layer.

Through adopting above-mentioned technical scheme, PSA high temperature resistant insulation felt has heat-resisting, insulating, high strength, resistant radiation, fire-retardant, chemical corrosion resistance and dimensional stability's advantage for the cable has good corrosion-resistant effect, avoids the chemical in the soil to cause the harm to the cable, has prolonged the life of cable.

Furthermore, the antioxidation layer comprises a rock wool foam ring plate layer and an anti-aging fluorocarbon coating layer coated on the inner wall and the outer wall of the rock wool foam ring plate layer.

By adopting the technical scheme, the rock wool foam ring plate has the characteristics of heat preservation, flame insulation and sound insulation, has good chemical stability, no corrosiveness and moisture resistance, plays a role in preventing water and moisture for the inner core of the cable, and avoids the phenomenon of core short circuit caused by the fact that a rubber insulating layer is aged due to moisture; the ageing-resistant fluorocarbon coating layer has good weather resistance, heat resistance, low temperature resistance and chemical resistance, and has unique non-adhesiveness and low friction, and the ageing phenomenon easily occurs due to the fact that rubber is in contact with the outside air for a long time.

To sum up, the utility model discloses following beneficial effect has:

1. the HNBR rubber has good wear resistance, heat resistance, high tearing performance and chemical corrosion resistance, when the cable is buried in soil, the wear resistance of the wear-resistant sheath layer is utilized to avoid hard particles in the soil from causing wear to the cable, and the service life of the cable is prolonged;

2. the anti-friction separator can separate a plurality of cable cores, and the phenomenon that the plurality of cable cores are mutually rubbed to cause damage when the external pressure is applied is avoided; the compression-resistant resilience layer is utilized, so that the pressure can be effectively buffered, the cable is prevented from being damaged, the service life of the cable is effectively prolonged, and the cable is safe and reliable;

3. utilize the spring, further strengthened the elasticity of rubber column, and the spring has good buffering cushioning effect, can effectually cushion external pressure, has improved the compressive property of cable, has prolonged the life of cable.

Drawings

Fig. 1 is a schematic overall sectional structure diagram of the present embodiment.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure: 1. an inner core of the cable; 101. a wire core; 102. a rubber insulating layer; 2. a wear-resistant sheath layer; 21. a HNBR rubber layer; 3. a heat-resistant layer; 31. a ceramic fiber mat layer; 4. a corrosion-resistant layer; 41. a PSA high temperature resistant insulation felt layer; 5. an anti-oxidation layer; 51. a rock wool foam ring plate layer; 6. an anti-friction spacer; 61. a support shaft; 62. a dividing strip; 63. a silica gel compression-resistant ring plate; 64. a placement cavity; 65. graphite fibers; 7. a compression resistant resilient layer; 71. a rubber column; 72. a high-elasticity rubber arc plate; 73. a rebound buffering space; 74. a wave curved surface; 8. a wavy annular plate; 9. a spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

referring to fig. 1, a weather-resistant buried communication cable includes a cable core 1, an oxidation resistant layer 5, a corrosion resistant layer 4, a heat resistant layer 3, and a wear-resistant sheath layer 2, which are sequentially coated from inside to outside, in this embodiment, the cable core 1 is provided with a plurality of cores, and the cable core 1 is composed of a core 101 and a rubber insulating layer 102 coated on the core 101.

The oxidation resistant layer 5 is used for coating the cable cores 1, the cable is easily deformed under the influence of external acting force as the cable is laid in soil, the oxidation resistant layer 5 is internally provided with anti-friction separators 6 used for separating the cable cores 1, and the arrangement of the anti-friction separators 6 can prevent the cable cores 1 from being extruded mutually to generate friction to damage the cable cores 101 when the cable is extruded by external force to deform, so that the normal operation of the power supply operation of the cable is influenced; be equipped with resistance to compression resilience layer 7 between wear-resisting restrictive coating 2 and heat-resisting layer 3, utilize resistance to compression resilience layer 7 to be used for dispersing external action pressure, further reduced the pressure that the cable received, avoid the cable impaired, the effectual life who prolongs the cable, safe and reliable.

Referring to fig. 1, the anti-friction separator 6 includes a support shaft 61 in the same direction as the axial direction of the cable, a plurality of rubber separation strips 62 arrayed along the circumferential direction of the support shaft 61, and a silica gel pressure-resistant ring plate 63 adhesively fixed on the inner wall of the anti-oxidation layer 5, wherein one ends of the plurality of rubber separation strips 62 far away from the support shaft 61 are connected with the inner wall of the silica gel pressure-resistant ring plate 63, and a placement cavity 64 for accommodating the cable core 1 is formed between the opposite side walls of two adjacent rubber separation strips 62 and the inner ring wall of the silica gel pressure-resistant ring plate 63; the combination of support shaft 61, rubber parting strip 62 and silica gel resistance to compression ring board 63 plays the spaced effect to a plurality of cable inner core 1, can avoid the cable to receive when external force extrudees, and a plurality of cable inner core 1 rubs each other and is impaired.

In this embodiment, the longitudinal section of silica gel resistance to compression ring board 63 is the hexagon setting, has increased the area of contact with oxidation resisting layer 5, and silica gel resistance to compression ring board 63 has compressive strength height, tear resistance, characteristics such as corrosion-resistant, and rubber parting bead 62 has good shock attenuation and cushioning effect, and the effectual cable inner core 1 that has reduced receives the extrusion effort of external force for the cable can the steady operation, has prolonged the life of cable.

Settle chamber 64 intussuseption and be filled with the graphite fiber 65 of cladding on cable inner core 1 outer wall, graphite fiber 65 has fire resistance and corrosion-resistant effect, plays the effect of protection to electric wire core 101, further strengthens cable working process's stability.

Referring to fig. 1 and 2, the anti-oxidation layer 5 includes a rock wool foam ring plate layer 51 and an anti-aging fluorocarbon paint layer (not shown) coated on the inner and outer walls of the rock wool foam ring plate layer 51; rock wool foam ring plate layer 51 has heat preservation, fire insulation, syllable-dividing characteristics, and the rock wool board has good chemical stability, non-corrosiveness and moisture resistance, plays waterproof moisture-resistant effect to cable inner core 1, avoids rubber insulation layer 102 to wet ageing and the phenomenon that appears sinle silk 101 short circuit.

The anti-aging fluorocarbon coating layer has good weather resistance, heat resistance, low temperature resistance and chemical resistance, and has unique non-adhesiveness and low friction property, and the rubber is contacted with the outside air for a long time, so that the aging phenomenon is easy to occur, the anti-aging fluorocarbon coating layer is coated on the inner side wall and the outer side wall of the rock wool foam ring plate layer 51, the rubber insulating layer 102 is protected, the aging phenomenon caused by the long-time contact of the rubber insulating layer 102 and the air is avoided, the service life of the cable is prolonged, the normal operation of power supply operation is prevented from being influenced, and the cable is safe and reliable.

Referring to fig. 1 and 2, corrosion-resistant layer 4 includes hugging closely the glued high temperature resistant insulation felt layer 41 of PSA of rock wool foam ring board outer wall, and the high temperature resistant insulation felt of PSA has heat-resisting, insulating, high strength, resistant radiation, fire-retardant, resistant chemical attack and dimensional stability's advantage for the cable has good corrosion-resistant effect, avoids the chemical in the soil to corrode the cable outer wall, has prolonged the life of cable.

Referring to fig. 2, the heat-resistant layer 3 includes at least one ceramic fiber felt layer 31 adhered to the outer wall of the PSA high-temperature-resistant insulation felt layer 41, in this embodiment, the ceramic fiber felt has two layers, the ceramic fiber felt is needle-punched by a needle-punching process, and the ceramic fiber is a fibrous light refractory material, and has the advantages of light weight, high temperature resistance, good thermal insulation stability, good chemical stability, low thermal conductivity, and the like, so that the cable has a good heat-resistant effect, and the service life of the cable is further prolonged.

Referring to fig. 2, the wear-resistant sheath layer 2 is an HNBR rubber layer 21, the HNBR rubber layer 21 is a hydrogenated nitrile rubber layer, and has good wear resistance, heat resistance, high tearing performance and chemical corrosion resistance, when the cable is buried in soil, the wear resistance of the wear-resistant sheath layer 2 is good, so that hard particles in the soil are prevented from causing wear to the soil, and the service life of the cable is effectively prolonged.

Referring to fig. 2, in order to avoid the cable to be deformed by the extrusion force, the compression-resistant rebound layer 7 is utilized to effectively buffer the external pressure, the compression-resistant rebound layer 7 comprises a plurality of high-elasticity rubber arc plates 72 which are arranged at equal intervals along the circumferential direction of the ceramic fiber felt layer 31, the plurality of high-elasticity rubber arc plates 72 are combined to form the wave ring plate 8, the inner ring wall of the HNBR rubber layer 21 is provided with a wave curved surface 74 matched with the outer ring wall of the wave ring plate 8, and the contact area between the HNBR rubber layer 21 and the outer ring wall of the wave ring plate 8 is increased.

A rebound buffering space 73 is formed between the inner annular wall of the wavy annular plate 8 and the outer wall of the ceramic fiber felt layer 31 in a surrounding manner, a rubber column 71 is arranged in the rebound buffering space 73, one end of the rubber column 71 is connected with the inner arc wall of the high-elasticity rubber arc plate 72, and the other end of the rubber column 71 is connected with the outer wall of the ceramic fiber felt layer 31; when the HNBR rubber layer 21 is subjected to external pressure, the high-elasticity rubber arc plate 72 and the rubber column 71 deform, the restoration of the HNBR rubber layer 21 is realized by utilizing the good elastic restoring force of the rubber column 71 and the high-elasticity rubber arc plate 72, and then the HNBR rubber layer 3, the corrosion-resistant layer 4, the oxidation-resistant layer 5 and the cable inner core 1 (figure 1) are protected, so that the cable inner core 1 is prevented from being damaged, the normal operation of power supply work is influenced, and the service life of the cable is prolonged.

Referring to fig. 2, the rubber column 71 is hollow, a spring 9 is arranged in the rubber column 71, the extension of the spring 9 is in the same direction as the axial direction of the rubber column 71, the spring 9 is arranged, the elastic effect of the rubber column 71 is further enhanced, in the embodiment, the rubber column 71 is arranged in a gourd shape, the outer diameter of the rubber column 71 is gradually decreased from the position close to the heat-resistant layer 3 to the direction away from the HNBR rubber layer 21, the contact area between the rubber column 71 and the outer wall of the ceramic fiber felt layer 31 is increased, so that when the HNBR rubber layer 21 is subjected to external pressure, the HNBR rubber layer 21 can be stably reset by utilizing the elastic forces of the spring, the rubber column 71 and the high-elasticity rubber arc plate 72.

The working process is as follows: when the cable is subjected to external pressure, the elastic force of the spring 9, the rubber column 71 and the high-elasticity rubber arc plate 72 is utilized to buffer the pressure, so that the HNBR rubber layer 21 is reset, the cable is protected, and the cable is prevented from being damaged and the normal operation of power supply work is prevented from being influenced; utilize silica gel resistance to compression ring board 63, rubber to separate strip 62 and back shaft 61 simultaneously, can separate a plurality of cable inner cores 1, avoid cable inner core 1 looks mutual friction to take place to damage, the effectual life who prolongs the cable.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a bury formula communication cable with weatherability, includes a plurality of cable inner cores (1), its characterized in that: still include by outer to interior in proper order cladding wear-resisting restrictive coating (2), heat-resisting layer (3), corrosion resistant layer (4) and oxidation resisting layer (5), oxidation resisting layer (5) are used for a plurality of cable inner core (1) of cladding, be equipped with antifriction separator (6) that are used for a plurality of cable inner core (1) in oxidation resisting layer (5), wear-resisting restrictive coating (2) are HNBR rubber layer (21), be equipped with resistance to compression resilience layer (7) between heat-resisting layer (3) and HNBR rubber layer (21).

2. The weatherable buried communication cable of claim 1, wherein: antifriction separator (6) are including back shaft (61), along a plurality of rubber division strip (62) of back shaft (61) circumference array and glued silica gel resistance to compression ring board (63) on oxidation resisting layer (5) inner wall, the longitudinal section of silica gel resistance to compression ring board (63) is the polygon setting, and is a plurality of the one end that back shaft (61) were kept away from in rubber division strip (62) links to each other with the inner wall of silica gel resistance to compression ring board (63), and is adjacent enclose between rubber division strip (62) and close the arrangement chamber (64) that are formed with and hold cable inner core (1).

3. The weatherable buried communication cable of claim 1, wherein: layer (7) are kick-backed in resistance to compression includes a plurality of rubber columns (71) and along a plurality of high elasticity rubber arc board (72) of heat-resistant layer (3) circumference array, and is a plurality of high elasticity rubber arc board (72) end to end, a plurality of high elasticity rubber arc board (72) combination forms wave crown plate (8), enclose between the outer wall of the inner ring wall of wave crown plate (8) and heat-resistant layer (3) and close and be formed with a plurality of springback buffer space (73), the inner wall of HNBR rubber layer (21) is equipped with and waves crown plate (8) matched with wave curved surface (74), rubber column (71) are located springback buffer space (73), the one end of rubber column (71) links to each other with the outer wall of heat-resistant layer (3), the other end of rubber column (71) links to each other with the inner wall of wave crown plate (8).

4. A weather resistant buried communication cable according to claim 3, wherein: the rubber column (71) is hollow, a spring (9) is arranged in the rubber column (71), and the extension of the spring (9) and the axial direction of the rubber column (71) are in the same direction.

5. A weather resistant buried communication cable according to claim 3, wherein: a plurality of rubber column (71) all are the calabash form setting, and are a plurality of the external diameter size of rubber column (71) is by being close to heat-resistant layer (3) to keeping away from the direction of HNBR rubber layer (21) and diminishing gradually.

6. The weatherable buried communication cable of claim 1, wherein: the heat-resistant layer (3) comprises at least one ceramic fiber felt layer (31).

7. The weatherable buried communication cable of claim 6, wherein: the corrosion-resistant layer (4) comprises a PSA high-temperature-resistant insulating felt layer (41) which is adhered and connected with the inner wall of the refractory ceramic fiber felt layer (31).

8. The weatherable buried communication cable of claim 1, wherein: the anti-oxidation layer (5) comprises a rock wool foam ring plate layer (51) and an anti-aging fluorocarbon coating layer coated on the inner wall and the outer wall of the rock wool foam ring plate layer (51).