CN114566315B

CN114566315B - Low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable

Info

Publication number: CN114566315B
Application number: CN202210189954.6A
Authority: CN
Inventors: 叶小军; 张佳亮; 赵家浪; 沙文; 周光亚; 陈飞虎; 徐志伟
Original assignee: Hua Yuan High Techs Cable Co ltd
Current assignee: Hua Yuan High Techs Cable Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-09-13
Anticipated expiration: 2042-02-28
Also published as: CN114566315A

Abstract

The invention discloses a low-smoke halogen-free flame-retardant B1-level isolated medium-voltage fireproof cable, which relates to the technical field of cables, and comprises a core wire and a cable outer sheath coated on the outer side of the core wire, and further comprises: the cable sheath comprises a cable sheath, a protective outer cladding, a gas supply cavity and a plurality of diffusion heads, wherein the cable sheath is coated with the protective outer cladding, the inner wall of the protective outer cladding is formed with the gas supply cavity along the length direction of the inner wall, and the positions, corresponding to the gas supply cavity, of the protective outer cladding are linearly provided with the plurality of diffusion heads. According to the invention, the gas for repelling the rats and the ants is injected into the gas supply cavity and is diffused along the length direction of the cable through the diffusion head, so that the medium-voltage fireproof cable is buried and paved for protection, the damage of the rats and the ants to the cable is prevented, and the gas supply cavity is matched with the diffusion head for gas supply type diffusion to perform protection for repelling the rats and the ants, so that the requirement of the cable on the actual service life is met, the effect of repelling the rats and the ants for a long time is realized, and the quality of the cable outer cladding layer is not influenced.

Description

Low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable

Technical Field

The invention relates to the technical field of cables, in particular to a low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable.

Background

Wire and cable are known for the transmission of electrical energy, information and electromagnetic energy converted wire products. Generally, a cable is composed of one or more insulated wire cores, a coating layer, a total protective layer and an outer protective layer which may be arranged on each insulated wire core, and the wire and the cable are used as main carriers of power transmission and are widely applied to aspects of electrical equipment, lighting circuits, household appliances and the like, and the quality of the wire and the cable directly influences the engineering quality and the life and property safety of consumers. Because of the reasons of urban land shortage, large traffic pressure, city appearance construction and the like, the existing medium-voltage fireproof cable generally adopts an underground cable power transmission mode, and compared with an overhead line, the cable has the advantages of small occupied area, reliable power transmission, strong anti-interference capability and the like, but the buried cable needs to be protected by insect prevention and mouse prevention so as to prevent the buried cable from being damaged by gnawing of animals at the ground, such as common ants, mice and the like, and the buried cable is easy to bring great damage to the buried line.

The rat-proof and ant-proof cavity cable is named as a rat-proof and ant-proof cavity cable with the application publication number of CN109585083A and the application publication date of 2019.04.05, and comprises a wire core, an insulating layer and an outer cladding layer, wherein the insulating layer and the outer cladding layer sequentially cover the wire core from inside to outside; the cable comprises an insulating layer, an outer cladding layer, a plurality of sealed and isolated accommodating cavities, a plurality of tearing iron wires, an outer layer and an outer layer, wherein a plurality of sealed and isolated accommodating cavities are uniformly distributed in the inner circumferential direction of the insulating layer, the number of wire cores is the same as that of the accommodating cavities, the insulating layer on one side, which is radially outward, of each accommodating cavity is coated with a plurality of tearing iron wires, in addition, a plurality of anti-abrasion ribs which extend along the axial direction of a cable body are distributed on the outer wall of the outer cladding layer in a protruding mode in the circumferential direction, the outer cladding layer is made of a rat and ant prevention material, and the rat and ant prevention material is made of pyrethrin, camphor and an aromatic slow release agent, so that smell which has strong stimulation on smell sense and taste sense of rats and insects can be generated, and rat and termites can be effectively prevented from being bitten by the rat and termites;

also, for example, application publication No. CN105575509A entitled an insect-repellent cable, the specific structure of which includes a conductor core, an insulating layer, and a protective layer; the outer part of the protective layer is also wrapped with a driving layer, the driving layer is provided with medicine rings in the axial direction at equal intervals, medicine spraying cavities made of elastic materials are arranged at equal intervals in the circumferential direction of each medicine ring, and insect repellents are filled in the medicine spraying cavities; a closed spiral coil is further mounted on one group of symmetrical inner walls of each medicine spraying cavity, and the axis of the spiral coil is not parallel to the axis of the medicine ring; anti-blocking nozzles are arranged on the medicine spraying cavities, and extend outwards along the radial direction of the medicine ring and extend out of the outer peripheral wall of the driving layer;

like the above-mentioned application is the same, when burying cable to ground among the prior art and carrying out protection against rodents protection against insects, mostly include two kinds of methods, one kind has amazing mouse ant smell for the outer cladding that adds the protection against rodents ant material in order to realize production in the raw materials through producing the outer cladding, another kind is through setting up the cavity in the outer cladding and filling insect repellant in order to drive mouse ant, but bury formula cable with ground in the actual service life long away, above-mentioned two kinds of modes can't satisfy the effect that drives mouse ant long-term, influence the quality of cable outer cladding simultaneously.

Disclosure of Invention

The invention aims to provide a low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable, which aims to overcome the defects in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides a fire-retardant B1 grade isolated form middling pressure fireproof cable of low smoke and zero halogen, includes heart yearn and the cable oversheath of cladding in the heart yearn outside, still includes: the cable sheath comprises a cable sheath, a protective outer cladding, a gas supply cavity, a plurality of diffusion heads and a gas supply cavity, wherein the cable sheath is coated with the protective outer cladding, the inner wall of the protective outer cladding is formed with the gas supply cavity along the length direction of the protective outer cladding, the positions, corresponding to the gas supply cavity, of the protective outer cladding are linearly provided with the plurality of diffusion heads, and inlets of the diffusion heads are communicated with the gas supply cavity.

As a further description of the above technical solution: the protection outer cladding layer is provided with a gas supply assembly at two ends, and the gas supply assembly is communicated with the gas supply cavity.

As a further description of the above technical solution: and sealing components are arranged at the positions, corresponding to the diffusion heads, in the air supply cavity, when the air supply component at one end of the protective outer cladding supplies air to the air supply cavity, the sealing components block the diffusion heads, and when the air supply component at the other end of the protective outer cladding supplies air to the air supply cavity, the sealing components open the diffusion heads.

As a further description of the above technical solution: the sealing assembly comprises a through hole plugging piece, the through hole plugging piece is arranged in the air supply cavity in a sliding mode and located at the position of a diffusion head, the through hole plugging piece is provided with two stations, the first station is used for plugging the diffusion head by the through hole plugging piece, the second station is used for plugging the diffusion head by the through hole plugging piece, and the diffusion head is opened by the through hole plugging piece.

As a further description of the above technical solution: the sealing assembly further comprises a guide adjusting part, an air cavity sealing piece is rotatably connected to the through hole sealing piece, the guide adjusting part is arranged in the air supply cavity and is in transmission connection with the air cavity sealing piece, and when the through hole sealing piece slides to the first station or the second station, the guide adjusting part drives the air cavity sealing piece to rotate so that the air supply cavity is communicated.

As a further description of the above technical solution: the guide adjusting part comprises a linear sliding groove arranged on the inner wall of the air supply cavity, the two ends of the linear sliding groove are communicated with arc-shaped sliding grooves, an adjusting part is arranged on the air cavity plugging piece, and the adjusting part is embedded in the linear sliding groove in a sliding manner.

As a further description of the above technical solution: the cable outer sheath comprises an oxygen isolation layer, a low-smoke halogen-free flame-retardant polyolefin inner layer, a steel tape armor and a low-smoke halogen-free flame-retardant polyolefin outer layer which are sequentially coated outside the core wire from inside to outside.

As a further description of the above technical solution: the core wire comprises a copper conductor, and a conductor shielding layer, a crosslinked polyethylene insulating layer, an insulating shielding layer, a metal shielding layer and an isolating layer which are sequentially coated outside the copper conductor from inside to outside.

As a further description of the above technical solution: the cable sheath is characterized in that the core wires are arranged in multiple groups, an external filling section bar is filled in the gap position between any two adjacent core wires and the cable sheath, the two side edges of the external filling section bar are connected with a plurality of abutting flanges, and the core wire filling section bar is filled in the central gap of the core wires.

As a further description of the above technical solution: the cable outer sheath is also fixedly sleeved with a cable fixing armor, a plurality of adjusting parts are arranged at two ends of the cable fixing armor, and the plurality of adjusting parts form a conical traction transition structure.

In the technical scheme, the low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable provided by the invention has the advantages that the gas for repelling rats and ants is injected into the gas supply cavity, the gas entering the gas supply cavity is diffused along the length direction of the cable through the diffusion head, so that the medium-voltage fireproof cable is buried and paved to be protected, the rats and ants are prevented from damaging the cable, the gas supply type diffusion is carried out through the matching of the gas supply cavity and the diffusion head to carry out rat and ant repelling protection, the requirement on the actual service life of the cable is met, the effect of repelling rats and ants for a long time is realized, and the quality of an outer wrapping layer of the cable is not influenced.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic end view of an assembled protective overwrap according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a protective overwrap according to an embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure of the protective outer cover according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of a closure assembly according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a guiding adjustment portion according to an embodiment of the present invention;

FIG. 6 is a schematic view of an assembly structure of a gas supply assembly according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a gas supply assembly according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an end face of an outer sheath of a cable according to an embodiment of the present invention;

FIG. 9 is a schematic end view of a core wire according to an embodiment of the present invention;

fig. 10 is a schematic view of a cable end face structure provided by an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of an exterior filled molding strip according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a core-filling profile according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a deformation converting element according to an embodiment of the present invention;

FIG. 14 is a structural schematic diagram of a first state assembly of a cable fixing armor provided by an embodiment of the invention;

FIG. 15 is a structural schematic view of a second state assembly of a cable retention harness in accordance with an embodiment of the present invention;

FIG. 16 is a schematic structural view of a first state of a cable fixing armor provided by the embodiment of the invention;

FIG. 17 is a schematic structural view of a second state of the cable fixing armor according to the embodiment of the invention;

fig. 18 is a schematic structural diagram of an adjusting portion according to an embodiment of the present invention;

FIG. 19 is a schematic view of a wear compensator according to an embodiment of the present invention.

Description of the reference numerals:

1. a cable outer sheath; 1.1, an oxygen barrier layer; 1.2, a low-smoke halogen-free flame-retardant polyolefin inner layer; 1.3, steel tape armoring; 1.4, a low-smoke halogen-free flame-retardant polyolefin outer layer; 10. a protective overwrap; 101. a gas supply cavity; 102. a diffusion head; 20. a seal assembly; 201. a through hole plugging member; 202. an air cavity blocking piece; 203. a guide adjusting part; 204. an adjustment projection; 2031. a linear chute; 2032. an arc-shaped chute; 30. a gas supply assembly; 301. an annular sleeve; 302. a gas supply joint; 303. an air supply connecting pipe; 2. a core wire; 2.1, copper conductor; 2.2, a conductor shielding layer; 2.3, crosslinking a polyethylene insulating layer; 2.4, insulating and shielding layers; 2.5, a metal shielding layer; 2.6, an isolation layer; 3. an outer filling profile; 31. an abutment flange; 32. a second wire slot; 33. a second abutting convex strip; 331. clamping the convex strips; 34. a strip-shaped notch; 4. filling a core with molding strips; 41. a central reinforcing rib; 42. a support profile; 421. a first wire slot; 422. a first abutting convex strip; 423. a clamping groove; 424. damping strip-shaped holes; 5. a deformation converting member; 51. an arc-shaped elastic strip; 52. an M-shaped elastic strip; 53. a T-shaped abutting strip; 6. fixing and armouring the cable; 61. connecting a sleeve; 62. fixing the sleeve; 621. an open slot; 622. an annular connecting groove; 623. an abutment gap; 63. an annular frame; 631. an adjustment section; 632. an anti-drop convex part; 64. a wear compensation member; 641. a wedge pin; 642. an elastic support member; 7. fixing the cross section.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 19, an embodiment of the present invention provides a technical solution: the utility model provides a fire-retardant B1 grade isolated form middling pressure fireproof cable of low smoke and zero halogen, includes that heart yearn 2 and cladding are at the cable oversheath 1 in the 2 outsides of heart yearn, still includes: the outer sheath 10 of the cable comprises a protective outer sheath 10, the protective outer sheath 10 is wrapped on the outer side of the outer sheath 1 of the cable, an air supply cavity 101 is formed in the inner wall of the protective outer sheath 10 along the length direction of the inner wall, a plurality of diffusion heads 102 are linearly arranged on the protective outer sheath 10 in positions corresponding to the air supply cavity 101, and inlets of the diffusion heads 102 are communicated with the air supply cavity 101.

Specifically, the embodiment provides a low-smoke halogen-free flame-retardant B1-level isolated medium-voltage fireproof cable, which comprises a core wire 2 and a cable outer sheath 1 covering the core wire 2, wherein the cable outer sheath 1 comprises an oxygen-insulating layer 1.1, a low-smoke halogen-free flame-retardant polyolefin inner layer 1.2, a steel tape armor 1.3 and a low-smoke halogen-free flame-retardant polyolefin outer layer 1.4, which are sequentially covered outside the core wire 2 from inside to outside, the core wire 2 comprises a copper conductor 2.1 and a conductor shielding layer 2.2, which is sequentially covered outside the copper conductor 2.1 from inside to outside, a cross-linked polyethylene insulating layer 2.3, an insulating shielding layer 2.4, a metal shielding layer 2.5 and an isolating layer 2.6, a protective outer sheath 10 is further covered outside the cable outer sheath 1, an air supply cavity 101 is formed on the inner wall of the protective outer sheath 10 along the length direction thereof, the air supply cavity 101 is provided with a plurality of air supply cavities 101, the plurality of air supply cavities 101 are arranged at equal angles in a ring shape, a plurality of diffusion heads 102 are arranged at equal angles at the positions corresponding to the surface of the protective outer sheath 10, when this middling pressure fire prevention cable buries formula when laying, can be through pouring into rat/ant repelling gas into air feed chamber 101, the gas that gets into in the air feed chamber 101 diffuses along cable length direction through diffusion head 102, thereby realize burying to this middling pressure fire prevention cable and lay and protect, prevent that rat/ant from destroying the cable, and carry out air feed formula diffusion through air feed chamber 101 cooperation diffusion head 102 and drive rat/ant protection, compare in prior art through adding rat/ant preventing material in the raw materials of production surrounding layer have amazing rat/ant smell in order to realize the surrounding layer of production, in addition or through set up the cavity in the surrounding layer and fill repellent in order to drive rat/ant, can have the life limit demand of satisfying cable in-service, realize the effect of driving rat/ant for a long year, influence the quality of cable surrounding layer simultaneously.

In another embodiment of the present invention, the gas supply assembly 30 is sleeved on both ends of the protective outer covering 10, and the gas supply assembly 30 is communicated with the gas supply chamber 101. Specifically, the gas supply assembly 30 includes an annular sleeve 301, the annular sleeve 301 is sleeved on the protective outer cladding 10, a gas supply connector 302 is arranged on the inner side of the annular sleeve 301 and communicated with the gas supply cavity 101, and a gas supply connecting pipe 303 is further connected to the outer side of the annular sleeve 301. When burying formula laying this cable, air feed connecting pipe 303 extends to ground, when carrying out air feed protection of repelling rats and ants, carry out the air feed through air feed connecting pipe 303, gas enters into annular sleeve 301 through air feed connecting pipe 303, finally pour into each air feed chamber 101 into through air feed joint 302 by annular sleeve 301, the gas that gets into in the air feed chamber 101 passes through diffusion head 102 along cable length direction diffusion, thereby realize burying to lay to this middling pressure fire prevention cable and protect, prevent that rats and ants from destroying the cable.

In another embodiment of the present invention, the air supply chamber 101 is provided with a sealing assembly 20 at a position corresponding to each diffusion head 102, when the air supply assembly 30 at one end of the protective outer covering 10 supplies air to the air supply chamber 101, each sealing assembly 20 seals each diffusion head 102, and when the air supply assembly 30 at the other end of the protective outer covering 10 supplies air to the air supply chamber 101, each sealing assembly 20 opens each diffusion head 102. It is optional, seal assembly 20 is the solenoid valve, the solenoid valve sets up in diffusion head 102, the solenoid valve is opened in the synchro control diffusion head 102 when one end air feed subassembly 30 air feed, realize air feed expulsion rat ant this moment, when other end air feed subassembly 30 air feed, the solenoid valve is closed in the synchro control diffusion head 102, air feed chamber 101 becomes airtight state this moment, through survey atmospheric pressure during the air feed subassembly 30 air feed, whether the fracture leakage scheduling problem appears in realization detection air feed chamber 101, make this middling pressure fireproof cable still have the function of supplementary detection air feed chamber 101 fracture leakage, prevent air feed chamber 101 fracture leakage, can't realize carrying out whole section expulsion rat protection to this middling pressure fireproof cable.

In a further embodiment of the present invention, the closure assembly 20 comprises a through hole closure 201, the through hole closure 201 is slidably disposed in the gas supply chamber 101 at the position of the diffusion head 102, the through hole closure 201 has two stations, a first station where the through hole closure closes the diffusion head 102, and a second station where the through hole closure 201 opens the diffusion head 102. The sealing assembly 20 further comprises a guiding adjusting part 203, the through hole plugging piece 201 is connected with an air cavity plugging piece 202 in a rotating mode, the guiding adjusting part 203 is arranged in the air supply cavity 101 and is connected with the air cavity plugging piece 202 in a transmission mode, and when the through hole plugging piece 201 slides to a first station or a second station, the guiding adjusting part 203 drives the air cavity plugging piece 202 to rotate so that the air supply cavity 101 is conducted. The guiding and adjusting part 203 comprises a linear chute 2031 arranged on the inner wall of the air supply cavity 101, the two ends of the linear chute 2031 are communicated with arc chutes 2032, an adjusting convex part 204 is arranged on the air cavity blocking part 202, and the adjusting convex part 204 is embedded in the linear chute 2031 in a sliding manner.

Specifically, the through-hole blocking member 201 is a slide plate, which is slidably disposed inside the air supply chamber 101, when the position of the slide plate 201 coincides with the position of the diffusion head 102, the through hole blocking piece 201 achieves the blocking of the diffusion head 102, that is, the through hole blocking piece 201 is located at the first station, when the position of the through hole blocking piece 201 is dislocated with the position of the diffusion head 102, the diffusion head 102 is in a conducting state, i.e. the through-hole closure 201 is located at the second station, the air chamber closure 202 is a partition plate which is pivotally connected to the through-hole closure 201 by means of a hinge shaft, and the air chamber closure 202 is adapted to the cross-section of the air supply chamber 101, namely, when the air cavity blocking piece 202 is in a vertical state, the air cavity blocking piece 202 realizes the blocking of the air supply cavity 101 at the moment, when the air chamber closure 202 rotates and deflects, the air supply chamber 101 is open, the hinge shaft is provided with a torsion spring, and the elasticity of the torsion spring is used for driving the air chamber closure 202 to be vertical.

As shown in fig. 3, when the air supply assembly 30 supplies air from the end a of the air supply cavity 101, at this time, the linear chute 2031 cooperates with the adjusting protrusion 204 to make the air cavity blocking piece 202 keep a vertical state to block the air supply cavity 101, and under the action of air pressure, the air cavity blocking piece 202 and the through hole blocking piece 201 are pushed to slide, so that the position of the through hole blocking piece 201 is dislocated with the position of the diffusion head 102, at this time, the diffusion head 102 is in a conducting state, and simultaneously, under the action of air pressure, the adjusting protrusion 204 rotates in the arc chute 2032, that is, the air cavity blocking piece 202 rotates and deflects to make the air supply cavity 101 conduct, and finally, the air supply and diffusion of the plurality of diffusion heads 102 are realized, so that the cable is supplied with air at all sections to expel rats and ants;

when the air supply assembly 30 supplies air from the end b of the air supply chamber 101, similarly, the linear chute 2031 cooperates with the adjustment protrusion 204 to keep the air chamber closure 202 in a vertical state to close the air supply chamber 101, under the action of air pressure, the air cavity plugging piece 202 and the through hole plugging piece 201 are pushed to slide, so that the position of the through hole plugging piece 201 coincides with the position of the diffusion head 102 to realize plugging of the diffusion head 102, and simultaneously, under the action of air pressure, the adjusting convex part 204 rotates in the arc-shaped chute 2032, namely, the air cavity plugging piece 202 rotates and deflects to lead the air supply cavity 101 to be conducted, when air supply is continued, the stable increasing surface of the air pressure is positioned in the air supply cavity 101 corresponding to the current diffusion head 102, no cracking and air leakage occur, make this middling pressure fireproof cable still have the function of supplementary detection air feed chamber 101 fracture leakage, prevent air feed chamber 101 fracture leakage, can't realize carrying out whole section expulsion rat termite protection to this middling pressure fireproof cable.

Furthermore, each air supply connector 302 is provided with an independent switch valve, so that independent switch control is realized during detection, independent leakage detection is realized for each air supply cavity 101, and detection is more convenient.

The embodiment of the invention provides another technical scheme: the core wires 2 are provided with a plurality of groups, the gap positions of any two adjacent core wires 2 and the cable outer sheath 1 are filled with external filling section bars 3, two side edges of the external filling section bars 3 are connected with a plurality of butt joint flanges 31, and the central gaps of the core wires 2 are filled with core wire filling section bars 4. The cladding of cable oversheath 1 is between a plurality of heart yearns 2, and a plurality of heart yearns 2 use the axis of cable oversheath 1 as central line annular equiangular uniform arrangement, form the approximate triangle-shaped clearance in cross-section between arbitrary adjacent two of heart yearns 2 that the annular was arranged and the cable oversheath 1, outside packing type strip 3 inlays to establish and fills in the clearance, outside packing type strip 3 and two adjacent heart yearns 2 and cable oversheath 1's clearance looks adaptation, the both sides limit equidistance of outside packing type strip 3 is connected with a plurality of butt flanges 31, butt flange 31 is integrative extrusion molding, optional butt flange 31 is sheetmetal or plastic sheet, be connected with a plurality of butt flanges 31 through the both sides limit equidistance of outside packing type strip 3, when carrying out extrusion molding processing cable oversheath 1 to this cable, each outside packing type strip 3 side butt each other, make the butt flange 31 on two outside packing type strips 3 that lie in relative side become the relative butt of "V" type structure of inversion Make the protruding outside of stretching to this cable inner structure layer of two butt flanges 31, thereby the embedding is in cable oversheath 1, make extrusion molding cable oversheath 1 time, the protruding stretching of butt flange 31 is connected rather than integrative extrusion molding, the realization is connected cable inner structure and cable oversheath 1, show improvement cable overall structure steadiness, prevent that the cable from pulling because external force when using, the problem of delaminating appears in extrusion and distortion scheduling factor lead to the cable, improve the life of cable, it is supplementary fixed spacing to outside filling type strip 3 to cooperate butt flange 31 to realize simultaneously, and then realize cooperating a plurality of outside filling type strips 3 and support fixedly to the heart yearn, it is eccentric to prevent that the cable from appearing when production, the circularity when improving the finished cable, improve the quality of cable.

In another embodiment provided by the present invention, the cable further includes a core filling section bar 4, the core filling section bar 4 is embedded in a central gap of the plurality of core wires 2, the core filling section bar 4 coincides with a central axis of the cable outer sheath 1, the core filling section bar 4 includes a central reinforcing rib 41 and a supporting section bar 42 sleeved outside the central reinforcing rib, a first wire groove 421 adapted to the core wires 2 is formed outside the supporting section bar 42, a first abutting convex strip 422 is formed on the supporting section bar 42 between two adjacent first wire grooves 421, the first abutting convex strip 422 abuts against a gap between two adjacent core wires 2, second wire grooves 32 are formed on two inner sides of the external filling section bar 3, a second abutting convex strip 33 is formed on the inner side of the external filling section bar 3 between two second wire grooves 32, and the second abutting convex strip 33 abuts against a gap between two adjacent core wires 2 and abuts against the first abutting convex strip 422. Specifically, a core wire filling section 4 is arranged in the central gap of a plurality of core wires 2 which are annularly arranged, the core wire filling section 4 comprises a central reinforcing rib 41 and a supporting section 42 which is sleeved outside the central reinforcing rib, the central reinforcing rib 41 obviously improves the tensile strength of the cable, meanwhile, the supporting section 42 which is positioned outside the central reinforcing rib 41 is matched with a first wire groove 421 and a first abutting convex strip 422 on the supporting section to realize the supporting and positioning of the inner side of each core wire 2, and is matched with a second wire groove 32 on an external filling section 3 to realize the supporting and positioning of the outer side of each core wire 2, so that the core wires 2 are fixed one by one, the stability of the overall structure of the cable is further improved, a first abutting convex strip 422 is formed between two adjacent first wire grooves 421 on the supporting section 42, and a second convex strip abutting 33 is formed between two second wire grooves 32 on the inner side of the external filling section 3, second butt convex strip 33 butt is in the clearance between two adjacent heart yearns 2 and with the laminating of first butt convex strip 422 for when this cable received the extrusion, can cooperate second butt convex strip 33 and first butt convex strip 422 direct action in the core wire filling section 4 through outside filling section 3, thereby reduce the pressure of heart yearn 2, protect heart yearn 2, prevent that heart yearn 2 from receiving the compressive deformation to cause its insulation degradation, lead to its damage.

In yet another embodiment of the present invention, a locking structure is disposed between the second abutting convex strip 33 and the first abutting convex strip 422, and the locking structure is used for locking and connecting the second abutting convex strip 33 and the first abutting convex strip 422 when they are engaged. The locking structure comprises a clamping convex strip 331 and a clamping groove 423, wherein the clamping convex strip 331 is formed on the second abutting convex strip 33, and the clamping groove 423 is formed on the first abutting convex strip 422. Optionally, the locking structure includes a clamping convex strip 331 and a clamping groove 423, the clamping convex strip 331 is formed on the first abutting convex strip 422, and the clamping groove 423 is formed on the second abutting convex strip 33. Through setting up the closure structure, when the inner structure equipment of this cable, the inboard of outside packing section bar 3 is arranged in the clearance between two adjacent heart yearns 2 of fashioned second butt convex strip 33 butt and with first butt convex strip 422 laminating butt between two second wire casing 32, joint convex strip 331 joint is in joint groove 423 this moment, realize assisting outside packing section bar 3 and sinle silk packing section bar 4 to carry out the closure connection, further improve the steadiness of cable inner structure, the rounding degree after the cable shaping of being convenient for simultaneously.

In another embodiment of the present invention, preferably, a strip-shaped notch 34 is formed on the outer side of the external filling profile 3 between the two second slots 32, a deformation converting member 5 is disposed in the strip-shaped notch 34, the deformation converting member 5 abuts against the cable sheath 1, and the deformation converting member 5 is configured such that when the cable sheath 1 is deformed by pressure and acts on the deformation converting member 5, the deformation converting member 5 drives the external filling profile 3 to deform and avoid the core wire 2. Specifically, the section of the bar-shaped notch 34 is approximately a V-shaped structure, the deformation converting element 5 includes an arc-shaped elastic strip 51 and an M-shaped elastic strip 52, the arc-shaped elastic strip 51 is disposed in the bar-shaped notch 34 with an opening facing outward, two outer sides of the arc-shaped elastic strip 51 are connected to inner walls of two sides of the bar-shaped notch 34, the M-shaped elastic strip 52 is disposed at the opening position of the arc-shaped elastic strip 51, two sides of the M-shaped elastic strip 52 are connected to inner walls of two sides of the bar-shaped notch 34, a T-shaped abutting strip 53 is formed on a central line of the M-shaped elastic strip 52 in a length direction, the T-shaped abutting strip 53 abuts against the cable sheath 1, two folding angle positions of the M-shaped elastic strip 52 opposite to the opening side of the arc-shaped elastic strip 51, when the outer portion of the cable is extruded, the pressure acts on the T-shaped abutting strip 53, at this time, the T-shaped abutting strip 53 acts on the pressure on the arc-shaped elastic strip 51 and the M-shaped elastic strip 52, the arc-shaped elastic strips 51 and the M-shaped elastic strips 52 draw the strip-shaped notch 34 to be gathered and closed, the strip-shaped notch 34 is gathered and closed to drive the second wire grooves 32 on two sides inside the external filling type strip 3 to be obliquely lifted, so that the core wire 2 on the inner side of the external filling type strip 3 is not extruded, the core wire 2 is protected, the cable outer sheath 1 is timely deformed under pressure, the core wire 2 can be kept free from being pressed, the core wire 2 is prevented from being damaged under pressure and deformed, the insulation of the guide information 2 is deteriorated, meanwhile, the T-shaped abutting strips 53 apply pressure to the arc-shaped elastic strips 51 and the M-shaped elastic strips 52, the arc-shaped elastic strips 51 and the M-shaped elastic strips 52 draw the strip-shaped notch 34 to be gathered and closed, meanwhile, the external filling type strip 3 acts on the clamping convex strips 331 and the clamping grooves 423, the stability of locking connection between the external filling type strip 3 and the wire core filling type strip 4 is improved, namely, the stable shaping of the internal structure of the cable cannot be influenced even if the cable is pressed and deformed, further improving the square delamination effect.

In another embodiment of the present invention, a damping strip hole 424 is formed in the supporting strip 42 at a position corresponding to each core wire 2, and the section of the damping strip hole 424 is an elliptical structure. Specifically, as shown in fig. 9, the pressed area of the cable sheath 1 is divided into two parts, one part is a part acting on the area of the deformation conversion part 5, and the other part is a part acting on the area outside the core wire 2, when the pressure acts on the area of the deformation conversion part 5, as described above, the deformation conversion part 5 pulls the strip-shaped notch 34 to close and drive the second wire grooves 32 on the two sides inside the external filling type strip 3 to tilt and lift, so as not to press the core wire 2 inside the external filling type strip 3, thereby protecting the core wire 2, preventing the core wire 2 from being damaged by the pressure deformation, and acting on the clamping convex strips 331 to abut against the clamping grooves 423, improving the stability of the locking connection between the external filling type strip 3 and the core wire filling type strip 4, i.e. realizing the cable deformation without affecting the stable shaping of the internal structure, when the pressure acts on the area outside of the core wire 2, at this moment, under the pressure effect, 2 push down of heart yearn, the shock attenuation bar hole 424 on the support section bar 42 warp, thereby protect heart yearn 2, prevent 2 compressive deformation damages of heart yearn, shock attenuation bar hole 424 warp compression joint groove 423 simultaneously, improve the stability of joint sand grip 331 and joint groove 423 locking connection, improve the stability of outside filling section bar 3 and 4 locking connections of sinle silk filling section bar, realize promptly that cable compressive deformation also can not influence its inner structure's firm nature.

The embodiment of the invention provides another technical scheme: still the fixed cover of fixed the having connected cable on the cable oversheath 1 has fixed armor 6, and 6 both ends of the fixed armor of cable are provided with a plurality of regulating parts 631, and a plurality of regulating parts 631 form the toper and pull transition structure. The adjusting parts 631 are telescopically arranged at two ends of the cable fixing armor 6, and when the adjusting parts 631 shrink to the periphery of the cable fixing armor 6, an axial fixing section 7 is formed between the end face of the cable fixing armor 6 and the cable outer sheath 1.

Specifically, the embodiment provides a tin-plated copper alloy composite conductor photovoltaic wire, a cable fixing armor 6 is formed on a cable outer sheath 1, an external connection part is formed in the middle of the cable fixing armor 6, the connection part is a groove structure arranged on the periphery of the cable fixing armor 6, the cable is fixed by the aid of the groove structure, a plurality of adjusting parts 631 are arranged at two ends of the cable fixing armor 6 in a telescopic and movable manner, the adjusting parts 631 are annularly and equiangularly distributed at two ends of the cable fixing armor 6, when the adjusting parts 631 protrude to the two ends of the cable fixing armor 6, conical traction transition structures are formed at two ends of the cable fixing armor 6, the cable is dragged and wired by the aid of the conical traction fixing structures during wiring traction, line damage caused by dragging and wiring due to overlarge friction force is prevented, and when the adjusting parts 631 shrink to the periphery of the cable fixing armor 6, an axial fixing section 7 is formed between the end face of the cable fixing armor 6 and the cable outer sheath 1, and the fixing sections 7 formed at the two ends of the cable fixing armor 6 can assist in axial linear fixing of the cable, so that stability of fixing the cable is improved.

In another embodiment of the present invention, the cable fixing sheath 6 includes a connection sleeve 61, a fixing sleeve 62 and two annular frames 63, the connection sleeve 61 is integrally formed on the cable outer sheath 1, and the fixing sleeve 62 is sleeved on the connection sleeve 61. The two annular frames 63 are arranged at two ends of the connecting sleeve 61, the annular frames 63 are slidably provided with adjusting parts 631, and the circumferential surface of the fixing sleeve 62 is provided with an opening groove 621 matched with the adjusting parts 631 for sliding adjustment. Concretely, integrated into one piece is on cable jacket 1 when adapter sleeve 61 is cable jacket 1 extrusion molding, adapter sleeve 62 is fixed to be cup jointed in adapter sleeve 61 middle section position department, the adapter sleeve 61 both ends extend to adapter sleeve 62's the outside, two annular frame 63 rotate the cover and establish the both ends at adapter sleeve 61, the spout has been seted up on the annular frame 63, regulation portion 631 slides and sets up in the spout, the tail end integrated into one piece of regulation portion 631 has anticreep convex part 632, the width of open slot 621 is greater than the width of spout, and open slot 621 and the mutual adaptation of anticreep convex part 632, can slide when making regulation portion 631 shrink to open slot 621 in.

In another embodiment of the present invention, the external connection portion is an annular connection groove 622 opened at the middle portion of the connection sleeve 61, the depth of the annular connection groove 622 is smaller than that of the opening groove 621, and an abutting gap 623 is formed at the intersection of the annular connection groove 622 and the opening groove 621. Specifically, the external connection portion is an annular connection groove 622 formed in the connection sleeve 61, and when the cable is fixed, the cable is fixed by being embedded in the annular connection groove 622 through the annular fixing member, so that the cable is prevented from moving linearly along the axial direction of the cable.

In still another embodiment of the present invention, a wear compensation member 64 is disposed in the opening groove 621, and the wear compensation member 64 is driven to be inserted into the abutting gap 623 when the adjusting portion 631 is retracted into the opening groove 621 on the peripheral surface of the cable fixing sheath 6. Specifically, the depth of the annular connecting groove 622 is smaller than that of the open groove 621, an abutting gap 623 is formed at the intersection of the annular connecting groove 622 and the open groove 621, the wear compensation part 64 comprises a wedge pin 641 and an elastic support element 642, when the adjusting part 631 contracts into the open groove 621, the tail end of the adjusting part 631 abuts against the elastic support element 642, the elastic support element 642 drives the wedge pin 641 to abut against and be embedded into the abutting gap 623, when wear occurs between the annular fixing part and the annular connecting groove 622, the wedge pin 641 is matched with the elastic support element 642 to be automatically embedded into the abutting gap 623, so that the annular fixing part is supported and tensioned, wear is loosened in a mode, continuous wear compensation supporting of the annular fixing part is realized, locking of circumferential rotation of the cable is realized, and the stability of fixing the cable is further improved.

In another embodiment of the present invention, when the ring frame 63 rotates to make the sliding slot on the ring frame communicate with the opening slot 621, the sliding adjustment of the adjusting portion 631 is achieved. When the annular frame 63 rotates to make the sliding groove on the annular frame dislocate and block the open slot 621, the adjusting portion 631 is abutted and fixed. Specifically, when the annular frame 63 rotates to enable the sliding groove on the annular frame to be correspondingly communicated with the open slot 621, the adjusting portion 631 can be adjusted in a sliding manner, that is, the adjusting portion 631 protrudes to the two ends of the cable fixing armor 6 to form a conical traction transition structure or the adjusting portion 631 contracts to the open slot 621 on the circumferential surface of the cable fixing armor 6, an axial fixing section 7 is formed between the end surface of the cable fixing armor 6 and the cable outer sheath 1, and when the adjusting portion 631 protrudes to the two ends of the cable fixing armor 6 or the adjusting portion 631 contracts to the open slot 621 on the circumferential surface of the cable fixing armor 6, the annular frame 63 rotates to enable the sliding groove on the annular frame to be abutted and fixed to the adjusting portion 631 when the sliding groove and the open slot 621 are plugged in a staggered manner.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. The utility model provides a fire-retardant B1 grade isolated form middling pressure fireproof cable of low smoke and zero halogen, includes heart yearn (2) and cladding cable oversheath (1) in heart yearn (2) outside, its characterized in that still includes:

the cable sheath comprises a protective outer cladding (10), wherein the protective outer cladding (10) covers the outer side of the cable sheath (1), an air supply cavity (101) is formed in the inner wall of the protective outer cladding (10) along the length direction of the protective outer cladding, a plurality of diffusion heads (102) are linearly arranged on the protective outer cladding (10) at positions corresponding to the air supply cavity (101), and inlets of the diffusion heads (102) are communicated with the air supply cavity (101);

the air supply cavity (101) is provided with sealing components (20) at positions corresponding to the diffusion heads (102), when the air supply component (30) at one end of the protective outer cladding (10) supplies air to the air supply cavity (101), the sealing components (20) seal the diffusion heads (102), and when the air supply component (30) at the other end of the protective outer cladding (10) supplies air to the air supply cavity (101), the sealing components (20) open the diffusion heads (102).

2. The low-smoke halogen-free flame-retardant B1-level isolated medium-voltage fireproof cable according to claim 1, wherein air supply components (30) are sleeved at both ends of the protective outer cladding (10), and the air supply components (30) are communicated with the air supply cavity (101).

3. The low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable according to claim 1, wherein the sealing assembly (20) comprises a through hole sealing piece (201), the through hole sealing piece (201) is slidably disposed in the air supply cavity (101) at a position of the diffusion head (102), the through hole sealing piece (201) has two stations, a first station, the through hole sealing piece (201) seals the diffusion head (102), and a second station, the through hole sealing piece (201) opens the diffusion head (102).

4. The low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable according to claim 3, wherein the sealing assembly (20) further comprises a guide adjusting part (203), the through hole sealing piece (201) is rotatably connected with an air cavity sealing piece (202), the guide adjusting part (203) is arranged in the air supply cavity (101) and is in transmission connection with the air cavity sealing piece (202), and when the through hole sealing piece (201) slides to a first station or a second station, the guide adjusting part (203) drives the air cavity sealing piece (202) to rotate so that the air supply cavity (101) is communicated.

5. The low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable according to claim 4, wherein the guide adjusting part (203) comprises a linear chute (2031) formed in the inner wall of the air supply cavity (101), both ends of the linear chute (2031) are communicated with arc chutes (2032), an adjusting convex part (204) is arranged on the air cavity blocking part (202), and the adjusting convex part (204) is slidably embedded in the linear chute (2031).

6. The low-smoke halogen-free flame-retardant B1-level isolated medium-voltage fireproof cable according to claim 1, wherein the cable outer sheath (1) comprises an oxygen isolation layer (1.1), a low-smoke halogen-free flame-retardant polyolefin inner layer (1.2), a steel tape armor (1.3) and a low-smoke halogen-free flame-retardant polyolefin outer layer (1.4) which are sequentially coated outside the core wire (2) from inside to outside.

7. The low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable according to claim 1, wherein the core wire (2) comprises a copper conductor (2.1), and a conductor shielding layer (2.2), a crosslinked polyethylene insulating layer (2.3), an insulating shielding layer (2.4), a metal shielding layer (2.5) and an isolating layer (2.6) which are sequentially coated outside the copper conductor (2.1) from inside to outside.

8. The low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable according to claim 1, wherein the core wires (2) are provided with multiple groups, the gap between any two adjacent core wires (2) and the cable outer sheath (1) is filled with an external filling type strip (3), the two side edges of the external filling type strip (3) are connected with multiple abutting flanges (31), and the central gap of the core wires (2) is filled with a wire core filling type strip (4).

9. The low-smoke halogen-free flame-retardant B1-grade isolated medium-voltage fireproof cable according to claim 1, wherein a cable fixing armor (6) is further fixedly sleeved on the cable outer sheath (1), a plurality of adjusting parts (631) are arranged at two ends of the cable fixing armor (6), and the adjusting parts (631) form a conical traction transition structure.