High-temperature-resistant double-shielded cable for electric power engineering

Abstract

The invention discloses a high-temperature-resistant double-shielding cable for electric power engineering, and the cable comprises a cable main body which is composed of an inner protection assembly, an outer protection assembly, and an assembly convenient to disassemble. According to the invention, under the arrangement of the wrapping tape, the sub-shielding net and the total shielding net, single-group conductive cores can be shielded and protected independently, multiple groups of conductive cores can be shielded and protected intensively, electromagnetic interference can be reduced, electromagnetic compatibility can be improved, signal leakage can be prevented, and cable reliability can be enhanced through double-layer shielding protection, and under the arrangement of the easy-to-tear opening, the convenient-to-tear opening and the ribs, the cable can be protected from being damaged. When the cable is used, a user can easily strip the outer sheath of the part, and then take down the annular structure formed by the four ribs layer by layer, so that the armor layer can be easily stripped, the user does not need to strip the outer sheath and the armor layer by using tools such as a cutter and the like, the damage to the internal structure of the cable main body is avoided, and the service life of the cable main body is prolonged. And meanwhile, the plurality of groups of easy-to-tear openings and convenient-to-tear openings are uniformly distributed, so that the damaged part of the cable main body can be conveniently replaced.

Description

Technical Field

[0001] The present invention relates to the technical field related to cables, in particular to a high temperature resistant double shielded cable for electric power engineering. Background Art

[0002] Power engineering refers to engineering related to the production, transmission and distribution of electric energy. In a broad sense, it also includes engineering that uses electricity as power and energy in various fields. It can also be understood as power transmission and transformation engineering. Cable is an indispensable transmission medium in power engineering. Cable is a wire product used to transmit electrical energy information and realize electromagnetic energy conversion. It has the characteristics of internal current conduction and external insulation.

[0003] The prior art has the following deficiencies: The prior art has a publication number of CN104616740A, which discloses a high-temperature resistant double-shielded cable, "including a main core, a control core, and a copper tape wrapping layer, a tinned copper wire braided shielding layer, a fluororubber insulation layer, and an outer sheath wrapped in sequence. The main core and the control core are three in number, overlapping up and down, and arranged closely and tangentially to each other. The main core is made of tinned copper wire wrapped with annealed steel wire, overlapping up and down, and twisted and woven to the right at a ratio of 20 wires / 0.5 square millimeter; a grounding core is also wrapped inside the copper tape wrapping layer, and a reinforced shielding layer, an aluminum silicate insulation layer, and an inner sheath layer are arranged in sequence between the fluororubber insulation layer and the outer sheath";

[0004] The above-mentioned high temperature resistant double-shielded cable adopts an outer sheath to protect the cable. The length of the cable produced is fixed. When the cable is laid, the length is insufficient or the overall length margin is long, and the cable needs to be cut or connected. Whether it is cutting or connecting, it is necessary to use a knife to strip the cable protective layer, insulation layer, armor layer, etc. The armor layer generally adopts a metal sheath, which is easy to damage the cable during the stripping process and is time-consuming and labor-intensive. At the same time, the overall heat dissipation and strength of the cable are poor, which is not conducive to the long-term and stable use of the cable. Summary of the invention

[0005] The object of the present invention is to provide a high temperature resistant double shielded cable for electric power engineering, so as to solve the problem raised in the above background technology that the existing cables are inconvenient to peel and replace the damaged parts.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a high-temperature resistant double-shielded cable for power engineering, comprising a cable body, wherein the cable body is composed of an inner protective component, an outer protective component and an easy-to-disassemble component, the inner protective component can protect the conductor core, the outer protective component can protect the inner protective component, and the easy-to-disassemble component can facilitate stripping of the cable body.

[0007] As a further preferred embodiment of the present technical solution, the inner protective assembly includes multiple groups of conductive cores, an insulating layer No. 1, a filler No. 1, an inner thermal conductive layer, a filler No. 2, a wrapping tape and a sub-shielding net, the multiple groups of conductive cores are made of copper wire, the insulating layer No. 1 is sleeved and installed on the outside of the conductive core, the filler No. 1 is filled between the insulating layer No. 1 and the conductive core, the inner thermal conductive layer is sleeved on the outside of the insulating layer No. 1, the filler No. 2 is filled between the inner thermal conductive layer and the insulating layer No. 1, the wrapping tape is wrapped and sleeved on the outside of the inner thermal conductive layer, and the sub-shielding net is sleeved on the outside of the wrapping tape.

[0008] As a further preferred embodiment of the present technical solution, the outer protective assembly includes a No. 2 insulating layer, a No. 3 filler, a total shielding mesh, an inner sheath, an outer thermal conductive layer, an armor layer, an outer sheath and multiple groups of through holes, the No. 2 insulating layer is sleeved on the outside of the sub-shielding mesh, the No. 3 filler is filled between the No. 2 insulating layer and the sub-shielding mesh, the total shielding mesh is sleeved on the outside of the No. 2 insulating layer, the inner sheath is sleeved on the outside of the total shielding mesh, the outer thermal conductive layer is sleeved on the outside of the inner sheath, the armor layer is sleeved on the outside of the outer thermal conductive layer, the outer sheath is sleeved on the outside of the armor layer, and multiple groups of through holes are opened between the outer thermal conductive layer and the inner thermal conductive layer.

[0009] As a further preferred embodiment of the present technical solution, the easy-to-disassemble components include multiple groups of easy-tear openings, multiple groups of easy-tear openings, multiple groups of seals, multiple groups of blocking blocks, two groups of protective sleeves, two groups of limiting grooves and fixing strips. Multiple groups of the easy-tear openings are opened on the surface of the outer sleeve, multiple groups of the easy-tear openings are opened on the surface of the outer sleeve, multiple groups of the seals are symmetrically arranged on the side walls of the outer sleeve, multiple groups of the blocking blocks are arranged on the inner walls of the seals, two groups of the protective sleeves are arranged between the seals, two groups of the limiting grooves are opened at the ends of the protective sleeves, and the fixing strips are penetrated and installed in the limiting grooves.

[0010] As a further preferred embodiment of the present technical solution, the armor layer is composed of multiple groups of connecting columns, multiple groups of ribs, two groups of through-holes and two groups of notches, the multiple groups of connecting columns are made of rubber material, the multiple groups of ribs are staggeredly sleeved on the outside of the connecting columns, the two groups of through-holes are opened at the top and bottom of the rib surface, the two groups of notches are staggeredly opened on the rib surface, and the multiple groups of ribs can form a circular ring structure.

[0011] As a further preferred embodiment of the present technical solution, the No. 2 insulating layer, the No. 1 insulating layer, the inner sheath and the outer sheath are all made of polyvinyl chloride material, the through hole is filled with thermal conductive wire, the overall shielding net and the sub-shielding net are both woven from copper wire, and the No. 3 filler, No. 2 filler and No. 1 filler are all made of silicone material.

[0012] As a further preferred embodiment of the present technical solution, the easy tearing opening is located between the convenient tearing openings, the easy tearing opening is in the shape of an elongated strip, and a plurality of groups of the convenient tearing openings are distributed in a ring shape.

[0013] As a further preferred embodiment of the present technical solution, the cross-sections of the sealing member and the protective sleeve are both arc-shaped structures, the blocking block is arranged corresponding to the tear opening, the blocking block is made of rubber material, and the cross-section of the limiting groove is trapezoidal structure.

[0014] The present invention provides a high temperature resistant double shielded cable for electric power engineering, which has the following beneficial effects:

[0015] (1) The present invention provides an inner protection component and an outer protection component. Under the setting of the No. 1 insulating layer, the conductor core can be insulated and protected. Under the setting of the No. 1 filler, the No. 2 filler and the No. 3 filler, the cable body can be kept round and the high temperature resistance of the cable body can be improved. Under the setting of the inner heat conductive layer, the through hole and the outer heat conductive layer, a good heat dissipation effect can be achieved, ensuring the stable transmission of electric energy by the cable body and extending the service life of the cable body. Under the setting of the wrapping tape, the sub-shielding net and the overall shielding net, a single group of conductor cores can be individually shielded. Shielding protection can also be performed on multiple groups of conductors. The double-layer shielding protection can reduce electromagnetic interference, improve electromagnetic compatibility, prevent signal leakage, and enhance cable reliability. Under the setting of the second insulation layer, the sub-shielding net and the overall shielding net can be separated to avoid entanglement and interlacing between the sub-shielding net and the overall shielding net, which is conducive to the subsequent stripping of the cable body. Under the setting of the inner sheath, armor layer and outer sheath, the cable body can withstand greater tension, pressure and extrusion during laying and use, and effectively resist damage from external physical factors.

[0016] (2) The present invention is provided with an easy-to-disassemble component. Under the setting of the seal and the protective cover, the easy-to-tear opening and the easy-to-tear opening can be sealed and protected to prevent liquid or particulate matter from entering the cable body through the easy-to-tear opening or the easy-to-tear opening. Under the setting of the notch and the through-opening, multiple groups of ribs can be arranged in a staggered manner and then tightly arranged and combined together to ensure the protective effect of the armor layer. Under the setting of the easy-to-tear opening, the easy-to-tear opening, the fixing strip, and the ribs are arranged in a staggered manner, the user can easily peel off the protective cover, seal, outer sheath, and armor layer of this part, and the user does not need to use tools such as knives to peel off the outer sheath and armor layer, which is convenient for the user to quickly peel the cable body and avoid damaging the internal structure of the cable body. At the same time, under the evenly distributed setting of multiple groups of easy-to-tear openings and easy-to-tear openings, it is easy to replace the damaged part of the cable body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the inner protection component of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the outer protection assembly of the present invention;

[0020] Figure 4 It is a schematic diagram of the overall front view structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the armor layer structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the convenient disassembly component of the present invention;

[0023] Figure 7 It is a schematic diagram of the sealing structure of the present invention;

[0024] Figure 8 It is a schematic diagram of the protective cover structure of the present invention;

[0025] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at point A in the middle.

[0026] In the figure: 1. Cable body; 2. Inner protection assembly; 3. Outer protection assembly; 4. Easy-to-disassemble assembly; 5. Core guide; 6. No. 1 insulation layer; 7. No. 1 filler; 8. Inner thermal conductive layer; 9. No. 2 filler; 10. Wrapping tape; 11. Sub-shielding net; 12. No. 2 insulation layer; 13. Overall shielding net; 14. Inner sheath; 15. Outer thermal conductive layer; 16. Armor layer; 17. Outer sheath; 18. Through hole; 19. Connecting column; 20. Rib; 21. Through-hole; 22. Notch; 23. Easy-tear mouth; 24. Easy-tear mouth; 25. Seal; 26. Blocking block; 27. Protective cover; 28. Limiting groove; 29. ​​Fixing strip; 30. No. 3 filler. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] The present invention provides a technical solution: Figure 2 and Figure 4As shown, in this embodiment, a high temperature resistant double-shielded cable for power engineering includes a cable body 1, and the cable body 1 is composed of an inner protective component 2, an outer protective component 3 and a convenient disassembly component 4. The inner protective component 2 can protect the guide core 5, and the outer protective component 3 can protect the inner protective component 2. The convenient disassembly component 4 can facilitate the stripping of the cable body 1. The inner protective component 2 includes multiple groups of guide cores 5, a No. 1 insulating layer 6, a No. 1 filler 7, an inner thermal conductive layer 8, a No. 2 filler 9, a wrapping tape 10 and a sub-shielding net 11. The multiple groups of guide cores 5 are made of copper wire, the No. 1 insulating layer 6 is sleeved and installed on the outside of the guide core 5, the No. 1 filler 7 is filled between the No. 1 insulating layer 6 and the guide core 5, and the inner thermal conductive layer 8 is sleeved on the outside of the No. 1 insulating layer 6. The No. 2 filler 9 is filled between the inner heat-conducting layer 8 and the No. 1 insulating layer 6, the wrapping tape 10 is wrapped and sleeved on the outside of the inner heat-conducting layer 8, the sub-shielding net 11 is sleeved on the outside of the wrapping tape 10, the No. 1 insulating layer 6 is made of polyvinyl chloride material, and the sub-shielding net 11 is woven from copper wire. The No. 2 filler 9 and the No. 1 filler 7 are both made of silicone material. Under the setting of the conductor core 5, electric energy can be transmitted. Under the setting of the No. 1 insulating layer 6, the conductor core 5 can be insulated and protected. Under the setting of the No. 1 filler 7 and the No. 2 filler 9, the cable body 1 can be kept round and the high temperature resistance of the cable body 1 is improved. Under the setting of the wrapping tape 10 and the sub-shielding net 11, a single group of conductor cores 5 can be individually shielded and protected.

[0029] like Figure 3 and Figure 4As shown, the outer protection component 3 includes a second insulating layer 12, a third filler 30, a total shielding net 13, an inner sheath 14, an outer heat conductive layer 15, an armor layer 16, an outer sheath 17 and a plurality of through holes 18, the second insulating layer 12 is sleeved on the outside of the sub-shielding net 11, the third filler 30 is filled between the second insulating layer 12 and the sub-shielding net 11, the total shielding net 13 is sleeved on the outside of the second insulating layer 12, the inner sheath 14 is sleeved on the outside of the total shielding net 13, and the outer The heat-conducting layer 15 is sleeved on the outside of the inner sheath 14, the armor layer 16 is sleeved on the outside of the outer heat-conducting layer 15, the outer sheath 17 is sleeved on the outside of the armor layer 16, and multiple groups of through holes 18 are opened between the outer heat-conducting layer 15 and the inner heat-conducting layer 8. The second insulating layer 12, the inner sheath 14 and the outer sheath 17 are all made of polyvinyl chloride material, and the through holes 18 are filled with heat-conducting wires. The total shielding net 13 is woven from copper wires, and the third filler 30 is a silicone material. Under the setting of the through hole 18 and the outer heat-conducting layer 15, the heat generated by the guide core 5 can be guided by the inner heat-conducting layer 8 through the through hole 18 to the outer heat-conducting layer 15 and dissipated, thereby conducting the heat of the cable body 1 during use from the inside to the outside, achieving a good heat dissipation effect, ensuring the stable transmission of electric energy by the cable body 1 and extending the service life of the cable body 1. Under the setting of the general shielding net 13, multiple groups of guide cores 5 can be centrally shielded and protected. The double-layer shielding protection can reduce electromagnetic interference, improve electromagnetic compatibility, prevent signal leakage, and enhance cable reliability. Under the setting of the second insulating layer 12, the sub-shielding net 11 and the general shielding net 13 can be separated to avoid entanglement and interlacing between the sub-shielding net 11 and the general shielding net 13, which is beneficial to the subsequent stripping of the cable body 1. Under the setting of the inner sheath 14, the armor layer 16 and the outer sheath 17, the cable body 1 can withstand greater tension, pressure and extrusion during laying and use, and effectively resist damage from external physical factors.

[0030] like Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the easy-to-remove component 4 includes multiple groups of easy-to-remove openings 23, multiple groups of easy-to-remove openings 24, multiple groups of sealing members 25, multiple groups of blocking blocks 26, two groups of protective sleeves 27, two groups of limiting grooves 28 and a fixing strip 29. Multiple groups of easy-to-remove openings 23 are opened on the surface of the outer sleeve 17, multiple groups of easy-to-remove openings 24 are opened on the surface of the outer sleeve 17, multiple groups of sealing members 25 are symmetrically arranged on the side wall of the outer sleeve 17, multiple groups of blocking blocks 26 are arranged on the inner wall of the sealing member 25, two groups of protective sleeves 27 are arranged between the sealing members 25, two groups of limiting grooves 28 are opened at the ends of the protective sleeves 27, and the fixing strip 29 is passed through and installed. Installed in the limiting groove 28, the armor layer 16 is composed of multiple groups of connecting columns 19, multiple groups of ribs 20, two groups of through-holes 21 and two groups of notches 22. Multiple groups of connecting columns 19 are made of rubber material, multiple groups of ribs 20 are staggeredly sleeved on the outside of the connecting columns 19, two groups of through-holes 21 are opened at the top and bottom of the surface of the ribs 20, two groups of notches 22 are staggeredly opened on the surface of the ribs 20, multiple groups of ribs 20 can form a circular ring structure, the easy tearing opening 23 is located between the easy tearing openings 24, the easy tearing opening 23 is in the shape of a long strip, multiple groups of easy tearing openings 24 are distributed in an annular shape, and the sealing member 25 The cross-sections of the blocking block 26 and the protective sleeve 27 are both arc-shaped structures. The blocking block 26 is arranged corresponding to the easy tearing opening 24. The blocking block 26 is made of rubber material. The cross-section of the limiting groove 28 is a trapezoidal structure. Under the setting of the sealing member 25 and the protective sleeve 27, the easy tearing opening 23 and the easy tearing opening 24 can be sealed and protected to prevent liquid or particles from entering the cable body 1 through the easy tearing opening 23 or the easy tearing opening 24. Under the setting of the notch 22 and the through-hole 21, multiple groups of ribs 20 can be arranged in a staggered manner, and then closely arranged and combined together to ensure the protective effect of the armor layer 16. The user only needs to connect the two groups of fixing strips 29 The two groups of protective sleeves 27 can be taken out from the limiting groove 28, and then the protective sleeves 27 can be removed, and then the two groups of sealing members 25 and the blocking blocks 26 are removed from the easy tear opening 24, so that the easy tear opening 23 and the easy tear opening 24 are exposed to the user's eyes, and the user can easily peel off this part of the outer sheath 17 along the easy tear opening 24, and then remove the annular structure formed by the four ribs 20 layer by layer, so as to easily complete the peeling of the armor layer 16, without the need for the user to use tools such as knives to peel off the outer sheath 17 and the armor layer 16, so that the user can quickly peel the cable body 1.

[0031] The present invention provides a high temperature resistant double shielded cable for electric power engineering, and the specific working principle is as follows:

[0032] When using the high temperature resistant double shielded cable for electric power engineering, under the setting of the core conductor 5, electric energy can be transmitted, under the setting of the No. 1 insulating layer 6, the core conductor 5 can be insulated and protected, under the setting of the No. 1 filler 7, the No. 2 filler 9 and the No. 3 filler 30, the cable body 1 can be kept round, and the high temperature resistance of the cable body 1 is improved at the same time, under the setting of the inner heat conductive layer 8, the through hole 18 and the outer heat conductive layer 15, the heat generated by the core conductor 5 can be guided from the inner heat conductive layer 8 to the outer heat conductive layer 15 through the through hole 18 and dissipated, thereby conducting the heat of the cable body 1 during use from the inside to the outside, achieving a good heat dissipation effect, and ensuring the stable transmission of electric energy by the cable body 1. The service life of the cable body 1 is extended. Under the setting of the wrapping tape 10, the sub-shielding net 11 and the overall shielding net 13, a single group of conductors 5 can be individually shielded and protected, and multiple groups of conductors 5 can also be centrally shielded and protected. The double-layer shielding protection can reduce electromagnetic interference, improve electromagnetic compatibility, prevent signal leakage, and enhance cable reliability. Under the setting of the second insulating layer 12, the sub-shielding net 11 and the overall shielding net 13 can be separated to avoid entanglement and interlacing between the sub-shielding net 11 and the overall shielding net 13, which is beneficial to the subsequent stripping of the cable body 1. Under the setting of the inner sheath 14, the armor layer 16 and the outer sheath 17, the cable body 1 can be laid and used. The cable body 1 can withstand greater tension, pressure and extrusion, and effectively resist damage from external physical factors. Under the setting of the seal 25 and the protective cover 27, the easy tearing opening 23 and the convenient tearing opening 24 can be sealed and protected to prevent liquid or particles from entering the cable body 1 through the easy tearing opening 23 or the convenient tearing opening 24. Under the setting of the notch 22 and the through-opening 21, multiple groups of ribs 20 can be arranged in a staggered manner, and then closely arranged and combined together to ensure the protective effect of the armor layer 16. When the cable body 1 needs to be peeled, the user only needs to take out the two groups of fixing strips 29 from the limiting groove 28, and the two groups of protective covers 27 can be split, and then the protective covers 27 can be removed, and then the two groups of seals 25 can be The blocking block 26 is removed from the easy tear opening 24, so that the easy tear opening 23 and the easy tear opening 24 are exposed to the eyes of the user. Under the setting of the easy tear opening 23 and the easy tear opening 24, the user can easily peel off the outer sheath 17 of this part, and then remove the annular structure formed by the four ribs 20 layer by layer, so as to easily complete the peeling of the armor layer 16. There is no need for the user to use tools such as knives to peel off the outer sheath 17 and the armor layer 16, which is convenient for the user to quickly peel the cable body 1 and avoid damaging the internal structure of the cable body 1. At the same time, under the evenly distributed setting of multiple groups of easy tear openings 23 and easy tear openings 24, it is easy to replace the damaged part of the cable body 1.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. High temperature resistant double shielded cable for power engineering, characterized by: The invention comprises a cable body (1), wherein the cable body (1) is composed of an inner protection component (2), an outer protection component (3) and a convenient disassembly component (4); the inner protection component (2) can protect a guide core (5); the outer protection component (3) can protect the inner protection component (2); and the convenient disassembly component (4) can facilitate stripping of the cable body (1).

2. The high temperature resistant double shielded cable for electric power engineering according to claim 1, characterized in that: The inner protection component (2) comprises a plurality of groups of conductor cores (5), a No. 1 insulating layer (6), a No. 1 filler (7), an inner heat conductive layer (8), a No. 2 filler (9), a wrapping tape (10) and a sub-shielding net (11); the plurality of groups of conductor cores (5) are all made of copper wire; the No. 1 insulating layer (6) is sleeved and installed on the outside of the conductor core (5); the No. 1 filler (7) is filled between the No. 1 insulating layer (6) and the conductor core (5); the inner heat conductive layer (8) is sleeved on the outside of the No. 1 insulating layer (6); the No. 2 filler (9) is filled between the inner heat conductive layer (8) and the No. 1 insulating layer (6); the wrapping tape (10) is wrapped and sleeved on the outside of the inner heat conductive layer (8); and the sub-shielding net (11) is sleeved on the outside of the wrapping tape (10).

3. The high temperature resistant double shielded cable for electric power engineering according to claim 1, characterized in that: The outer protection component (3) comprises a second insulating layer (12), a third filler (30), a general shielding net (13), an inner sheath (14), an outer heat conductive layer (15), an armor layer (16), an outer sheath (17) and a plurality of through holes (18); the second insulating layer (12) is sleeved on the outside of the sub-shielding net (11); the third filler (30) is filled between the second insulating layer (12) and the sub-shielding net (11); The overall shielding net (13) is sleeved on the outside of the second insulating layer (12), the inner sheath (14) is sleeved on the outside of the overall shielding net (13), the outer heat-conducting layer (15) is sleeved on the outside of the inner sheath (14), the armor layer (16) is sleeved on the outside of the outer heat-conducting layer (15), the outer sheath (17) is sleeved on the outside of the armor layer (16), and a plurality of groups of through holes (18) are provided between the outer heat-conducting layer (15) and the inner heat-conducting layer (8).

4. The high temperature resistant double shielded cable for electric power engineering according to claim 1, characterized in that: The easy-to-disassemble component (4) comprises a plurality of groups of easy-to-tear openings (23), a plurality of groups of easy-to-tear openings (24), a plurality of groups of sealing members (25), a plurality of groups of blocking blocks (26), two groups of protective sleeves (27), two groups of limiting grooves (28) and a fixing strip (29). The plurality of groups of easy-to-tear openings (23) are provided on the surface of the outer sleeve (17), the plurality of groups of easy-to-tear openings (24) are provided on the surface of the outer sleeve (17), the plurality of groups of sealing members (25) are symmetrically arranged on the side wall of the outer sleeve (17), the plurality of groups of blocking blocks (26) are arranged on the inner wall of the sealing member (25), the two groups of protective sleeves (27) are provided between the sealing members (25), the two groups of limiting grooves (28) are provided at the ends of the protective sleeves (27), and the fixing strip (29) is penetrated and installed in the limiting groove (28).

5. The high temperature resistant double shielded cable for electric power engineering according to claim 3, characterized in that: The armor layer (16) is composed of a plurality of groups of connecting columns (19), a plurality of groups of ribs (20), two groups of through-holes (21) and two groups of notches (22); the plurality of groups of connecting columns (19) are made of rubber material; the plurality of groups of ribs (20) are staggeredly sleeved outside the connecting columns (19); the two groups of through-holes (21) are opened at the top and bottom of the surface of the ribs (20); the two groups of notches (22) are staggeredly opened on the surface of the ribs (20); and the plurality of groups of ribs (20) can form a circular ring structure.

6. The high temperature resistant double shielded cable for electric power engineering according to claim 3, characterized in that: The second insulating layer (12), the first insulating layer (6), the inner sheath (14) and the outer sheath (17) are all made of polyvinyl chloride material, the through hole (18) is filled with heat-conducting wire, the overall shielding net (13) and the sub-shielding net (11) are both woven from copper wire, and the third filler (30), the second filler (9) and the first filler (7) are all made of silicone material.

7. The high temperature resistant double shielded cable for electric power engineering according to claim 4, characterized in that: The easy tearing opening (23) is located between the convenient tearing openings (24), the easy tearing opening (23) is in the shape of a long strip, and a plurality of groups of the convenient tearing openings (24) are distributed in a ring shape.

8. The high temperature resistant double shielded cable for electric power engineering according to claim 4, characterized in that: The cross-sections of the sealing member (25) and the protective sleeve (27) are both arc-shaped structures; the blocking block (26) is arranged corresponding to the tear opening (24); the blocking block (26) is made of rubber material; and the cross-section of the limiting groove (28) is a trapezoidal structure.

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