CN112017809B

CN112017809B - Cross-linked polyethylene insulated low-smoke halogen-free fire-resistant power cable

Info

Publication number: CN112017809B
Application number: CN202010886343.8A
Authority: CN
Inventors: 余学东; 张常兵; 王红; 田东升; 刘忠发; 刘欢欢
Original assignee: Anhui Guoxin Cable Polytron Technologies Inc
Current assignee: Anhui Guoxin Cable Polytron Technologies Inc
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2022-05-10
Anticipated expiration: 2040-08-28
Also published as: CN112017809A

Abstract

The invention discloses a cross-linked polyethylene insulation low-smoke halogen-free fire-resistant power cable which comprises a main cable, wherein the main cable comprises an outer sheath, steel tape armoring is arranged on the peripheral edge of the inner side of the outer sheath, an inner sheath is arranged on the inner side of the steel tape armoring close to the middle position, wrapping belts are arranged on the peripheral edge of the inner side of the inner sheath, filling PVC is filled in the middle position of the wrapping belts, and three groups of auxiliary conductors are uniformly arranged on the inner side of the filling PVC; the invention can improve the overall toughness strength of the main cable, prevent the cable main body from being damaged by external force, protect the interior of the main cable main body, ensure the normal use of the main cable, effectively prevent the steel-tape armor from sliding on the inner side of the outer sheath, prevent the cable from sliding in the cable pulling process, prevent the cable body from slipping in the internal disassembling process, have certain insulation and steam-proof effects on the internal conductor, and prevent the copper conductor from being locally damaged to influence the normal use effect.

Description

Cross-linked polyethylene insulated low-smoke halogen-free fire-resistant power cable

Technical Field

The invention belongs to the field of cables, and particularly relates to a cross-linked polyethylene insulated low-smoke halogen-free fireproof power cable.

Background

At present, the electric wire and the cable play an important role in the infrastructure of China, and with the continuous development of China, for the power cable industry, aiming at the continuously changing market and requirement, the traditional industry mode can not adapt to the market development, so that the industry transformation is not slow for many enterprises; the basic structure of the power cable comprises four parts, namely a wire core, an insulating layer, a shielding layer and a protective layer, wherein the wire core is a conductive part of the power cable and is a main part of the power cable, the insulating layer is used for electrically isolating the wire core from the ground and the wire cores of different phases to ensure the transmission of electric energy, the wire core is an indispensable component in the structure of the power cable, and the protective layer is used for protecting the power cable from the invasion of external impurities and moisture and preventing external force from directly damaging the power cable.

The power cable on the market can not improve the tough and tensile intensity of whole of main cable mostly, and the inside external force that easily suffers of cable main part just easily receives destruction, and the cable is dragged the in-process and is easily taken place the line body and slide, and the line body slippage phenomenon easily takes place in the in-process is disassembled to the cable inside, and the insulation and the vapour proof effect of inner conductor are poor, and for this reason, we provide a fire-resistant power cable of insulating low smoke and zero halogen of crosslinked polyethylene.

Disclosure of Invention

The invention aims to provide a cross-linked polyethylene insulation low-smoke halogen-free fire-resistant power cable, which aims to solve the problems that most of power cables in the market proposed in the background technology cannot improve the overall toughness and strength of a main cable, the inside of a cable main body is easy to be subjected to external force and damaged, a cable body is easy to slide in a cable pulling process, a cable body slipping phenomenon is easy to occur in an internal disassembling process, and the insulation and waterproof steam effects of an internal conductor are poor.

In order to achieve the purpose, the invention provides the following technical scheme: the cross-linked polyethylene insulated low-smoke halogen-free fireproof power cable comprises a main cable, wherein the main cable comprises an outer sheath, steel belt armoring is arranged on the periphery of the inner side of the outer sheath, an inner sheath is arranged on the inner side of the steel belt armoring close to the middle position, a wrapping belt is arranged on the periphery of the inner side of the inner sheath, filling PVC is filled in the middle position of the wrapping belt, three groups of auxiliary conductors are uniformly arranged on the inner side of the filling PVC, a conductor shield is arranged on the middle position of the inner side of each auxiliary conductor, a steel belt shield is arranged on the middle position inside the conductor shield, an insulation shield is sleeved on the outer surface of each auxiliary conductor, and an interwoven wire mesh is arranged on the outer surface of the insulation shield;

five groups of copper conductors are uniformly arranged on the inner side of the steel belt shield, five groups of insulating walls are uniformly arranged on the inner side of the steel belt shield, the outer surface of the auxiliary conductor is filled with cross-linked polyvinyl chloride, a plurality of groups of convex bodies are uniformly and fixedly arranged on the outer surface of the steel tape armor and the position close to the peripheral edge of the upper end, partition walls are uniformly and fixedly arranged in the middle of the inner side of the wrapping tape, a first arc body is fixedly arranged on the surface, close to the left side, of each partition wall, a second arc body is fixedly arranged on the surface of the partition wall close to the right side, XLOP insulation is filled in the middle of the interior of the wrapping tape, a lead sleeve is fixedly arranged at the middle position of the partition wall, a first partition body is fixedly arranged on the partition wall close to the upper side, a second separator is fixedly arranged on the partition wall close to the left side, a plurality of groups of alumina silk threads are uniformly and fixedly arranged on the outer surface of the first separator, and a third separator is fixedly arranged on the partition wall close to the right side.

As a further scheme of the invention: the belting is fixedly sleeved with the outer sheath through the matching of the inner sheath and the steel strip armor, and the auxiliary conductor, the conductor shield and the steel strip shield jointly form an inner conductor structure.

As a further scheme of the invention: the three groups of inner conductor structures are fixedly arranged with the wrapping tape through the matching of partition walls and the first partition bodies, the partition walls are triangular, and the wrapping tape is uniformly divided into three groups of cylinder cavities through the partition walls.

As a further scheme of the invention: the first arc body and the second arc body are symmetrically arranged relative to the partition wall, and the first arc body, the second arc body and the partition wall jointly form a third partition body.

As a further scheme of the invention: and the third spacers are respectively fixedly arranged with the first spacers and the second spacers through the matching of the partition walls and the lead sleeves, and the first spacers, the partition walls and the first arc bodies jointly form a triangular stable structure.

As a further scheme of the invention: the copper conductors in the groups are fixedly arranged with the steel belt shields through the insulating walls, the steel belt shields are equally divided into five groups of conductor cylinder cavities through the insulating walls, and the steel belt armors are fixedly clamped with the outer sheaths through the convex bodies.

As a further scheme of the invention: the auxiliary conductor is fixedly arranged with the steel belt shield through the cooperation of the cross-linked polyvinyl chloride, the conductor shield and the insulation shield, the included angle between the auxiliary conductor and the insulation shield is formed, and the plurality of groups of the cross-linked silk screens are spirally wound with the insulation shield.

Compared with the prior art, the invention has the beneficial effects that:

1. through being provided with partition wall and the first arc body, the inner conductor structure is by assisting the conductor, conductor shield and steel band shielding constitute jointly, and the inner conductor structure passes through the partition wall, the triangle firm structure that first arc body and first partition body constitute jointly is fixed to be set up in the band inboard, a plurality of groups's alumina silk threads of laying on the rethread second arc body surface, can promote the frictional force on triangle firm structure surface, from this the firm installation in band inboard of inner conductor structure accessible triangle firm structure, and support through the inner wall in partition wall and the inboard three position of band, can effectively improve the holistic tough and tough intensity of main cable, avoid the cable main part to suffer external force and receive destruction, play the guard action to main cable main part inside, ensure the normal use of main cable.

2. By arranging the auxiliary conductor, the interwoven wire mesh and the convex bodies, the steel tape armor can be clamped and fixed on the inner side of the outer sheath through the convex bodies and is fixedly arranged at the joints at the two ends of the steel tape armor through a plurality of groups of convex bodies, the steel-tape armor can be fixedly clamped at the inner side of the outer sheath through the convex bodies fixedly arranged at the two sides of the steel-tape armor, can effectively avoid the sliding of the steel-tape armor on the inner side of the outer sheath and the sliding in the cable pulling process, the friction force on the surface of the cable can be effectively enhanced by the interweaving silk net arranged on the surface of the insulation shield, and then the cable can not be normally used by the auxiliary conductor which forms an included angle of 15 degrees with the insulation shield, can avoid the clamping arrangement of the inner conductor structure and the insulation shield, avoid the phenomenon of wire body slipping in the process of disassembling the cable inside, and the interwoven wire mesh is uniformly distributed on the surface of the insulation shield, so that certain insulation and waterproof effects on the inner conductor can be achieved.

3. Through being provided with the partition wall and the steel band shielding, through mutually supporting between them for five equal divisions are evenly divided into to the inside of steel band shielding, and five copper conductor groups pass through the fixed middle part that sets up at the main cable in five group's cylinder chamber, for this through five copper conductor groups, when providing electric power connection for the cable main part, can effectively avoid the copper conductor to take place the local damage and influence the effect of normal use, improve the whole practical strength of cable main part.

Drawings

Fig. 1 is a cross-sectional view of the main body of the present invention.

Fig. 2 is a schematic structural view of the outer sheath and the convex body in the invention.

Fig. 3 is a schematic view of the construction of the auxiliary conductor and the interlaced mesh in the present invention.

Fig. 4 is a cross-sectional view of the insulation shield and copper conductor of the present invention.

Fig. 5 is a cross-sectional view of a partition wall and a conductor shield in the present invention.

Figure 6 is a cross-sectional view of a strap according to the invention.

Fig. 7 is a schematic view of the structure of the first separator and the lead sheath according to the present invention.

Fig. 1, main cable; 101. an outer sheath; 102. steel tape armoring; 103. an inner sheath; 104. wrapping belts; 105. filling PVC; 106. an auxiliary conductor; 107. a conductor shield; 108. shielding a steel belt; 109. insulating shielding; 10. interweaving a silk screen; 11. a copper conductor; 12. an insulating wall; 13. cross-linked polyvinyl chloride; 14. a convex body; 15. a partition wall; 16. a first arc body; 17. a second arc body; 18. XLOP insulation; 19. a lead sleeve; 20. a first spacer; 21. a second spacer; 22. an alumina wire; 23. and a third spacer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-7, a cross-linked polyethylene insulated low-smoke halogen-free fire-resistant power cable comprises a main cable 1, the main cable 1 comprises an outer sheath 101, a steel-tape armor 102 is arranged on the inner peripheral edge of the outer sheath 101, an inner sheath 103 is arranged on the inner side of the steel-tape armor 102 near the middle position, a tape 104 is arranged on the inner peripheral edge of the inner sheath 103, a filling PVC105 is filled in the middle position of the tape 104, three sets of auxiliary conductors 106 are uniformly arranged on the inner side of the filling PVC105, a conductor shield 107 is arranged on the middle position on the inner side of the auxiliary conductor 106, a steel-tape shield 108 is arranged on the middle position inside the conductor shield 107, an insulation shield 109 is sleeved on the outer surface of the auxiliary conductor 106, an interwoven wire mesh 10 is arranged on the outer surface of the insulation shield 109, wherein the friction force on the surface of the insulation shield 109 can be effectively enhanced, and then the auxiliary conductor 106 forms an included angle of 15 degrees with the insulation shield 109, the clamping arrangement of the inner conductor structure and the insulation shield 109 can be avoided;

five groups of copper conductors 11 are uniformly arranged on the inner side of a steel strip shield 108, five groups of insulating walls 12 are uniformly arranged on the inner side of the steel strip shield 108, cross-linked polyvinyl chloride 13 is filled on the outer surface of an auxiliary conductor 106, a plurality of groups of convex bodies 14 are uniformly and fixedly arranged on the outer surface of a steel strip armor 102 and close to the peripheral edge of the upper end, a partition wall 15 is uniformly and fixedly arranged at the middle position of the inner side of a wrapping tape 104, a first arc body 16 is fixedly arranged on the partition wall 15 close to the left side surface, a second arc body 17 is fixedly arranged on the partition wall 15 close to the right side surface, XLOP insulation 18 is filled at the middle position inside the wrapping tape 104, a lead sleeve 19 is fixedly arranged at the middle position on the partition wall 15, a first partition body 20 is fixedly arranged on the partition wall 15 close to the upper side, a second partition body 21 is fixedly arranged on the partition wall 15 close to the left side surface, a plurality of groups of alumina silk threads 22 are uniformly and a third partition body 23 is fixedly arranged on the partition wall 15 close to the right side, through the aluminium oxide silk thread 22 of a plurality of groups that lay on the second arc 17 surface, can promote the surperficial frictional force of triangle stable structure, from this inner conductor structure accessible triangle stable structure is installed at band 104 inboardly, and supports through the inner wall in partition wall 15 and the inboard three position of band 104, can effectively improve the holistic tough and tensile intensity of main cable 1, avoids the cable main part to suffer external force and receive the destruction.

Band 104 is established through inner sheath 103 and the fixed cover of steel tape armor 102 cooperation with oversheath 101, and auxiliary conductor 106, conductor shield 107 and steel tape shield 108 constitute the inner conductor structure jointly, and the intermediate position of band 104 adopts the insulating 18 of XLEP, can avoid cable inner conductor mixed and disorderly with the separation of three inner conductor structure elastoplasticity of group, and effectively improve the internal insulation effect.

The three groups of inner conductor structures are fixedly arranged with the wrapping tape 104 through the matching of the partition walls 15 and the first spacers 20, the partition walls 15 are in a triangular prism shape, and the wrapping tape 104 is uniformly divided into three groups of cylindrical cavities through the partition walls 15.

The first arc body 16 and the second arc body 17 are symmetrically arranged relative to the partition wall 15, the first arc body 16, the second arc body 17 and the partition wall 15 jointly form a third partition body 23, and friction on the surface of the triangular stable structure can be improved through a plurality of groups of aluminum oxide silk threads 22 distributed on the surface of the second arc body 17, so that the inner conductor structure can be stably installed on the inner side of the wrapping tape 104 through the triangular stable structure.

Three third spacers 23 of group pass through the cooperation of divider wall 15 and lead sleeve 19 and set up with first spacer 20 and second spacer 21 are fixed respectively, first spacer 20, divider wall 15 and first arc 16 constitute triangle firm structure jointly, the triangle firm structure that the inner conductor structure passes through divider wall 15, first arc 16 and first spacer 20 and constitutes jointly is fixed to be set up in band 104 inboard, a plurality of groups of aluminium oxide silk threads 22 of laying on the surface of rethread second arc 17, can promote the frictional force on triangle firm structure surface.

The plurality of groups of copper conductors 11 are fixedly arranged with the steel tape shield 108 through the insulating wall 12, the steel tape shield 108 is equally divided into five groups of conductor cylinder cavities through the insulating wall 12, and the steel tape armor 102 is fixedly clamped with the outer sheath 101 through the convex body 14.

Auxiliary conductor 106 is through crosslinked polyvinyl chloride 13, conductor shield 107 and insulation shield 109 cooperation and the fixed setting of steel band shielding 108, and auxiliary conductor 106 is 15 with insulation shield 109's contained angle, a plurality of groups interweave silk screen 10 and are the heliciform and the winding setting of insulation shield 109, through the interweave silk screen 10 that sets up on insulation shield 109 surface, can effectively strengthen the frictional force on its surface, again through the auxiliary conductor 106 that is 15 contained angles with insulation shield 109, can avoid the solid setting of interior conductor structure and insulation shield 109's card, avoid the cable to take place the line body slippage phenomenon at the internal disassembly in-process.

The working principle of the power cable is as follows: through being provided with partition wall 15 and first arc 16, the inner conductor structure is by auxiliary conductor 106, conductor shield 107 and steel band shield 108 constitute jointly, and the inner conductor structure passes through partition wall 15, the triangle firm structure that first arc 16 and first insulator 20 constitute jointly sets up in band 104 inboard, a plurality of groups of aluminium oxide silk threads 22 of laying on the surface of rethread second arc 17, can promote the frictional force on triangle firm structure surface, inner conductor structure accessible triangle firm structure is installed inboard in band 104 from this, and support through the inner wall in partition wall 15 and the inboard three position of band 104, can effectively improve the holistic tough and tensile intensity of main cable 1, avoid the cable main part to suffer external force and receive the destruction, play the guard action to the inside of main cable 1 main part, ensure the normal use of main cable 1. By arranging the auxiliary conductor 106, the interwoven wire mesh 10 and the convex bodies 14, the steel-strip armor 102 can be fixedly clamped on the inner side of the outer sheath 101 through the convex bodies 14, the convex bodies 14 are fixedly arranged at the interfaces at the two ends of the steel-strip armor 102 through a plurality of groups of convex bodies 14, the steel-strip armor 102 can be fixedly clamped on the inner side of the outer sheath 101 through the convex bodies 14 fixedly arranged on the two sides of the steel-strip armor 102, the sliding of the steel-strip armor 102 on the inner side of the outer sheath 101 can be effectively avoided, the sliding of the cable in the pulling process of the cable can be avoided, the cable can not be normally used, the friction force on the surface of the insulated shield 109 can be effectively enhanced through the interwoven wire mesh 10 arranged on the surface of the insulated shield 109, the clamping arrangement of the inner conductor structure and the insulated shield 109 can be avoided through the auxiliary conductor 106 forming an included angle of 15 degrees with the insulated shield 109, the slipping phenomenon of the cable body in the inner disassembling process can be avoided, and the interwoven wire mesh 10 can be uniformly arranged on the surface of the insulated shield 109, the insulating and waterproof effect on the inner conductor can be achieved to a certain extent. Then, the protection strength of the whole cable can be effectively enhanced through the inner sheath 103 arranged in the cable, the shaping of the whole cable can be effectively improved by filling a certain amount of filling PVC105 in the cable, the short circuit phenomenon in the cable can be effectively avoided, the conductors in each auxiliary conductor 106 can be effectively isolated independently by filling the cross-linked polyvinyl chloride 13 on the outer surface of the auxiliary conductor 106, the mutual relative sliding is avoided, meanwhile, the large-area damage of an internal circuit is effectively avoided, the XLOP insulation 18 is adopted in the middle position of the wrapping belt 104, the elastic-plastic separation of three groups of internal conductor structures can be realized, the disorder of the internal conductors of the cable is avoided, and the internal insulation effect is effectively improved; at last through being provided with insulating wall 12 and steel band shielding 108, through mutually supporting between them for steel band shielding 108's inside is evenly divided into five equal divisions, and five copper conductor 11 of group set up the middle part at main cable 1 through five fixed settings in group's section of thick bamboo chamber, for this through five copper conductor 11 of group, when for the cable main part provides electric power connection, can effectively avoid copper conductor 11 to take place the local damage and influence the effect of normal use, improves the whole practical strength of cable main part.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.

Claims

1. The utility model provides an insulating low smoke and zero halogen fire-resistant power cable of crosslinked polyethylene, its characterized in that, includes main cable (1), main cable (1) includes oversheath (101), the inboard edge all around of oversheath (101) is provided with steel band armor (102), the inboard of steel band armor (102) is close to intermediate position and is provided with inner sheath (103), the inboard edge all around position of inner sheath (103) is provided with band (104), the intermediate position of band (104) is filled and is filled PVC (105), the inboard of filling PVC (105) evenly is provided with three group of auxiliary conductors (106), the inboard intermediate position of auxiliary conductor (106) is provided with conductor shield (107), the inside intermediate position of conductor shield (107) is provided with steel band shield (108), the surface cover of auxiliary conductor (106) is equipped with insulation shield (109), the outer surface of the insulation shield (109) is provided with an interwoven wire mesh (10);

five groups of copper conductors (11) are uniformly arranged on the inner side of the steel band shield (108), five groups of insulating walls (12) are uniformly arranged on the inner side of the steel band shield (108), cross-linked polyvinyl chloride (13) is filled on the outer surface of the auxiliary conductor (106), a plurality of groups of convex bodies (14) are uniformly and fixedly arranged on the outer surface of the steel band armor (102) close to the peripheral edge of the upper end, partition walls (15) are uniformly and fixedly arranged at the middle position of the inner side of the wrapping band (104), first arc bodies (16) are fixedly arranged on the partition walls (15) close to the left side surface, second arc bodies (17) are fixedly arranged on the partition walls (15) close to the right side surface, XLOP insulation (18) is filled at the middle position of the inner part of the wrapping band (104), lead sleeves (19) are fixedly arranged at the middle position of the partition walls (15), and first partition bodies (20) are fixedly arranged on the partition walls (15) close to the upper side, a second partition body (21) is fixedly arranged on the partition wall (15) close to the left side, a plurality of groups of alumina silk threads (22) are uniformly and fixedly arranged on the outer surface of the first partition body (20), and a third partition body (23) is fixedly arranged on the partition wall (15) close to the right side.

2. The cross-linked polyethylene insulated low-smoke halogen-free fire-resistant power cable according to claim 1, wherein the wrapping tape (104) is fixedly sleeved with the outer sheath (101) through the cooperation of the inner sheath (103) and the steel tape armor (102), and the auxiliary conductor (106), the conductor shield (107) and the steel tape shield (108) form an inner conductor structure together.

3. The cross-linked polyethylene insulated low-smoke zero-halogen fire-resistant power cable is characterized in that three groups of inner conductor structures are fixedly arranged with a wrapping tape (104) through matching of a partition wall (15) and a first spacer (20), the partition wall (15) is in a triangular body shape, and the wrapping tape (104) is uniformly divided into three groups of cylindrical cavities through the partition wall (15).

4. The cross-linked polyethylene insulated low-smoke zero-halogen fire-resistant power cable according to claim 1, wherein the first arc body (16) and the second arc body (17) are symmetrically arranged with respect to the partition wall (15), and the first arc body (16), the second arc body (17) and the partition wall (15) together form a third spacer (23).

5. The cross-linked polyethylene insulated low-smoke halogen-free fire-resistant power cable according to claim 1, wherein three groups of the third spacers (23) are respectively fixedly arranged with the first spacer (20) and the second spacer (21) through the cooperation of the partition wall (15) and the lead sleeve (19), and the first spacer (20), the partition wall (15) and the first arc body (16) jointly form a triangular stable structure.

6. The cross-linked polyethylene insulated low-smoke halogen-free fire-resistant power cable according to claim 1, wherein a plurality of groups of copper conductors (11) are fixedly arranged with a steel tape shield (108) through an insulating wall (12), the steel tape shield (108) is equally divided into five groups of conductor cylinder cavities through the insulating wall (12), and the steel tape armor (102) is fixedly clamped with an outer sheath (101) through a convex body (14).

7. The cross-linked polyethylene insulated low-smoke zero-halogen fire-resistant power cable according to claim 1, wherein the auxiliary conductor (106) is fixedly arranged with the steel belt shield (108) through the cooperation of the cross-linked polyvinyl chloride (13), the conductor shield (107) and the insulation shield (109), an included angle between the auxiliary conductor (106) and the insulation shield (109) is 15 degrees, and a plurality of groups of the cross-linked wire nets (10) are spirally wound with the insulation shield (109).