A high strength high flame retardant cable

Abstract

The application discloses a high-strength and high-flame-retardant cable, relates to the technical field of cables, and comprises a plurality of wires and a protective sheath layer wrapping the plurality of wires, an inner side of the protective sheath layer being connected and fixed with a partition frame body, the partition frame body being used for separating the plurality of wires with equal radii on the inner side of the protective sheath layer, and an outer side of the wires being wrapped with a flexible fireproof filling material, the flexible fireproof filling material being located between the protective sheath layer and the partition frame body. The flexible fireproof filling material plays a role in buffering impact and stress pressure, significantly improves the fireproof performance of the wires, and the plurality of wires are separated from each other by the partition frame body, so that the problems of abnormal resistance and strength reduction caused by abrasion and heat accumulation under interaction are avoided, the high-strength and high-flame-retardant cable has the effect of achieving the purpose of significantly improving structural strength and flame-retardant performance.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cables, in particular to a high-strength high-flame-retardant cable. BACKGROUND

[0002] A cable refers to a wire with an insulating layer and a protective outer skin, which is composed of multiple strands of wires insulated from each other. With the development of social power, people's demand for outdoor low-temperature-resistant high-voltage cables is increasing. In order to avoid the impact on power transmission and the service life of the cable due to poor low-temperature resistance when the high-voltage cable is used, the cable industry is committed to developing a high-strength high-flame-retardant cable suitable for outdoor use.

[0003] A Chinese patent with publication number CN216528187U discloses a special-shaped halogen-free low-smoke fire-resistant power cable. The special-shaped halogen-free low-smoke fire-resistant power cable includes a conductor, the conductor is provided with six groups, and the adjacent conductors are connected through reinforcing columns, and the center position of the six groups of conductors is provided with a tensile inner core, the outer wall of the tensile inner core is connected with six groups of tensile rubber strips, the bottom end of the six groups of tensile rubber strips is connected to one side of the conductor, the outer side of the six groups of conductors is wrapped with a metal layer, the outer side of the metal layer is sequentially provided with an oxygen barrier layer and an outer sheath, and the six groups of conductors and the metal layer are filled with a filling layer.

[0004] However, the special-shaped halogen-free low-smoke fire-resistant power cable only forms a multiple fireproof structure between the fire-resistant layer and the oxygen barrier layer and the metal layer on the outer side of the conductor when achieving the flame-retardant effect, and only releases the tension through the connection between the tensile rubber strip and the tensile inner core when improving the tensile performance. The structure is simple, and the multiple conductors have the problem of conductor breakage caused by pulling the reinforcing column during use, which seriously affects the service life of the special-shaped halogen-free low-smoke fire-resistant power cable, and needs to be improved. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a high-strength high-flame-retardant cable to achieve the purpose of significantly improving the structural strength while ensuring high flame retardance. The specific scheme is as follows:

[0006] A high-strength high-flame-retardant cable includes multiple conductors and a protective sleeve layer wrapping the multiple conductors. The inner side of the protective sleeve layer is connected and fixed with a partition frame body, the partition frame body is used to separate the multiple conductors with equal curvature on the inner side of the protective sleeve layer, and the outer side of the conductors is wrapped with a flexible fireproof filling material between the protective sleeve layer and the partition frame body.

[0007] Preferably, the partition frame comprises a plurality of arc-shaped partitions with equal arc length, and a plurality of wires are respectively located between and abut against two corresponding arc-shaped partitions; the arc-shaped partitions are connected to each other at one end and connected and fixed to the protective sheath layer at the other end.

[0008] Preferably, the arc-shaped partitions comprise an expanded elastic portion with an inner diameter greater than the diameter of the wire and a matching positioning portion with an inner diameter matching the diameter of the wire; the outer side of the matching positioning portion is provided with a connecting protrusion for connecting and fixing to the inner side of the protective sheath layer.

[0009] Preferably, the two sides of the connecting protrusion are respectively provided with a tooth-shaped end and / or an arc-shaped end for embedding into the protective sheath layer; the tooth-shaped end and / or the arc-shaped end form an included angle with the outer side of the matching positioning portion; the outer side of the flexible fireproof filling material is embedded into the included angle and in contact with the inner side of the protective sheath layer.

[0010] Preferably, the partition frame comprises a central cylindrical portion, and a plurality of arc-shaped partitions are arranged on the outer circumferential wall of the central cylindrical portion with equal arc length; the inner side of the central cylindrical portion is provided with a central hole or is solid.

[0011] Preferably, a connecting reinforcing arm with an opening facing the central cylindrical portion is arranged between two adjacent expanded elastic portions; one end of the connecting reinforcing arm is connected to the outer end of one of the expanded elastic portions and the central cylindrical portion, and the other end is connected to the inner side of the other expanded elastic portion and separated from the central cylindrical portion; an elastic inner cavity is formed between the connecting reinforcing arm, the central cylindrical portion and the corresponding elastic expanded portion.

[0012] Preferably, the flexible fireproof filling material comprises a plurality of internally built filling materials and externally laid filling materials which are paired with each other; the corresponding internally built filling materials are located between two adjacent expanded elastic portions, connecting reinforcing arms and wires, and the externally laid filling materials are located between corresponding wires and protective sheath layers and in contact with adjacent arc-shaped partitions.

[0013] Preferably, the outer side of the protective sheath layer is sequentially provided with a flame-retardant layer and a wear-resistant sheath layer.

[0014] Preferably, the inner side of the protective sheath layer is provided with a plurality of connecting cavities matched with corresponding connecting protrusions; the outer side of the protective sheath layer is provided with a plurality of helical protrusions with equal arc length, and a spacing groove between the flame-retardant layer and the protective sheath layer is formed between two adjacent helical protrusions.

[0015] Preferably: the preparation method steps for manufacturing high-strength high-flame-retardant cables include: S1, preparing a conductor, twisting a conductive copper wire to form a copper wire conductor, and using a copper wire to weave a conductor protection layer outside the copper wire conductor, and using a continuous sulfur production process to co-extrude three layers of conductor shielding layer, insulation layer and insulation shielding layer outside the conductor protection layer to form a conductor; S2, preparing a partition frame body, mixing 30-40 parts by weight of polyethylene, 70-80 parts of ethylene propylene rubber and 6-8 parts of additives, melting and then passing through a flat vulcanizing machine to obtain a frame material, and then preheating the frame material to 70 DEG C and adding it through a mold to obtain; S3, assembling and forming, embedding the flexible fireproof filler and the plurality of conductors into the partition frame body, and then covering the protective sleeve layer, and then covering the flame-retardant layer and the wear-resistant sleeve layer after the protective sleeve layer is connected and fixed with the partition frame body; wherein the additive includes 0.3-0.5 parts of vulcanizing agent, 0.8-1.2 parts of reinforcing agent and 4.9-6.3 parts of accelerator.

[0016] Through the above scheme, the present application provides a high-strength high-flame-retardant cable, which has the following beneficial effects:

[0017] 1. The flexible fireproof filler not only plays a role in buffering impact and stress pressure, but also significantly improves the fireproof performance of the conductor, and the plurality of conductors are separated by the partition frame body to avoid the problem of abnormal resistance and strength reduction caused by mutual abrasion and heat accumulation;

[0018] 2. The plurality of arc-shaped separators with equal arc distribution uniformly distribute the conductors at the center of the high-strength high-flame-retardant cable, and the elastic recovery force generated by the arc-shaped separators after deformation clamps the corresponding conductors, thereby improving the stability of the conductors in the high-strength high-flame-retardant cable, and resetting in time to achieve the effect of buffering impact force and stress pressure for a long time after relative movement;

[0019] 3. The corresponding one end of the plurality of arc-shaped separators with equal arc distribution is connected with each other, and the other end is connected and fixed with the protective sleeve layer, so that the arc-shaped separators have the effect of stable connection structure, and the expansion elastic part with an inner diameter larger than the diameter of the conductor plays the role of effectively supporting and limiting the conductor after stress deformation, so as to buffer impact and stress pressure, and reset in time if the conductor moves relatively; and the matching positioning part with an inner diameter matching the diameter of the conductor realizes the effect of maximizing the contact surface and dispersing the impact force and stress pressure when matching and connecting the corresponding conductor;

[0020] 4. By connecting and fixing the connecting protrusion to the protective sheath, the manufacturing difficulty of the high-strength and high-flame-retardant cable will be significantly reduced. At the same time, the toothed end and / or arc-shaped end will improve the connection and fixing stability of the connecting protrusion and the protective sheath and form an angle with the flexible fireproof filler, so as to further reduce the manufacturing difficulty of the high-strength and high-flame-retardant cable.

[0021] 5. Connecting multiple arc-shaped separators through the central cylindrical part will improve the elasticity of the arc-shaped separators and the stability of the connection structure. The central hole can also optimize the material and effectively buffer the impact force and stress, or improve the strength of the material on the inner side.

[0022] 6. The connecting reinforcing arm within the expanded elastic part further enhances the structural stability of the expanded elastic part. When the expanded elastic part itself deforms due to external force, the elastic restoring force of the expanded elastic part and the connecting reinforcing arm enable the expanded elastic part to reset in time. Furthermore, the elastic cavity enhances the structural elasticity and restoring ability of the connecting reinforcing arm.

[0023] 7. Flexible fireproof filler, consisting of multiple paired internal and external fillers, is used to fill the space between the arc-shaped partition, conductors, and protective sheath, thereby mitigating external impact, efficiently resetting, and ensuring high flame retardancy.

[0024] 8. The flame-retardant layer achieves a flame-retardant effect, and the wear-resistant sleeve layer achieves a wear-resistant effect. The multiple spiral protrusions with equal arc distribution on the outer side of the protective sleeve layer cooperate with the flame-retardant layer to form multiple spacer grooves, so as to achieve the purpose of wear resistance, flame retardancy, improving structural strength and mitigating external forces.

[0025] 9. By preparing the conductor and the partition frame, and then combining the conductor, partition frame and flexible fireproof filler, the inner side of the protective sleeve is connected to the connecting protrusion of the partition frame when the protective sleeve is covered. This forms a connecting cavity matching the connecting protrusion on the inner side of the protective sleeve, which significantly improves the stability of the connection. Then, by successively covering the flame-retardant layer and the wear-resistant sleeve, the purpose of high flame retardancy and high wear resistance is achieved. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a structural schematic diagram of the high-strength, high-flame-retardant cable disclosed in this application;

[0028] Figure 2 Figure 1 is a schematic view of the combination structure of the flexible fireproof filler, the wire and the partition frame body disclosed in the present application.

[0029] Reference signs: 1, wire; 2, partition frame body; 21, central cylindrical part; 211, central hole; 22, arc-shaped partition body; 221, matching positioning part; 222, expansion elastic part; 23, connecting protrusion; 231, tooth-shaped end; 232, arc-shaped end; 24, connecting reinforcing arm; 25, elastic inner cavity; 3, protective sheath layer; 31, connecting cavity; 32, spiral protrusion; 33, spacing groove; 4, flexible fireproof filler; 41, built-in filler; 42, externally laid filler; 5, flame-retardant layer; 6, wear-resistant sheath layer. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] It should be mentioned that the vulcanizing agent, the reinforcing agent and the accelerator utilized in the embodiments of the present application are all common added materials, and the flame-retardant layer and the wear-resistant sheath layer are both structures with corresponding functions. In the technical solutions of the present application, the functional features are realized in a combined manner, which will not be described here in detail.

[0032] Embodiment one

[0033] As shown in Figure 1 , a high-strength high-flame-retardant cable includes a plurality of wires 1 and a protective sheath layer 3 wrapping the plurality of wires 1. At the same time, a flame-retardant layer 5 and a wear-resistant sheath layer 6 are sequentially arranged outside the protective sheath layer 3. The flame-retardant layer 5 plays an effective flame-retardant role, and the wear-resistant sheath layer 6 plays an effective wear-resistant role.

[0034] As shown in Figure 1 , Figure 2 , a partition frame body 2 is fixedly connected to the inside of the protective sheath layer 3. The partition frame body 2 is used to separate the plurality of wires 1 at an arc on the inside of the protective sheath layer 3, so that the plurality of wires 1 are in a mutually separated state, to avoid the problem of structural damage caused by mutual friction between the wires 1 and direct hard contact under external force.

[0035] It should be noted that the flexible fireproof filling material 4 is wrapped outside the wire 1, and is located between the protective sheath layer 3 and the partition frame body 2. Among them, the partition frame body 2 includes a plurality of arc-shaped partition bodies 22 with equal arc, and a plurality of wires 1 are respectively located between the corresponding two arc-shaped partition bodies 22 and abut with the arc-shaped partition bodies 22, so as to form a stable connection structure, and then realize the purpose of internal filling and external effect alleviation through the flexible fireproof filling material 4.

[0036] Among the plurality of arc-shaped partition bodies 22 of the partition frame body 2, the ends close to each other are connected to each other, and the other ends are connected and fixed with the protective sheath layer 3. Specifically, the arc-shaped partition body 22 includes an expanded elastic part 222 for mutual connection and with an inner diameter larger than the diameter of the wire 1, and a matching positioning part 221 with an inner diameter matched with the diameter of the wire 1. A connecting protrusion 23 for connecting and fixing with the inner side of the protective sheath layer 3 is arranged outside the matching positioning part 221. At the same time, a plurality of connecting cavities 31 matched with the corresponding connecting protrusions 23 are arranged on the inner side of the protective sheath layer 3. And a plurality of spiral protrusions 32 with equal arc are arranged on the outer side of the protective sheath layer 3, so that a spacing groove 33 between the flame-retardant layer 5 and the protective sheath layer 3 is formed between the adjacent two spiral protrusions 32. The spacing groove 33 has the purpose of achieving wear resistance, flame resistance, improving structural strength and relieving external force of the high-strength and high-flame-retardant cable.

[0037] As shown in Figure 1 , Figure 2 , the tooth-shaped end 231 and the arc-shaped end 232 for embedding in the protective sheath layer 3 are arranged on both sides of the connecting protrusion 23. Among them, the tooth-shaped end 231 and the arc-shaped end 232 are formed with a corresponding included angle on the outer side of the matching positioning part 221, and the outer side of the flexible fireproof filling material 4 is embedded in the included angle and contacts the inner side of the protective sheath layer 3, so that the flexible fireproof filling material 4 and the partition frame body 2 form a stable connection structure.

[0038] It should be noted that a center cylindrical part 21 for connecting and fixing with the plurality of arc-shaped partition bodies 22 is arranged at the center position of the partition frame body 2, and the plurality of arc-shaped partition bodies 22 are distributed with equal arc on the outer circumferential side wall of the center cylindrical part 21. At the same time, in order to optimize the material of the center cylindrical part 21 and effectively buffer the external effects such as impact force and stress, a center hole 211 is arranged on the inner side of the center cylindrical part 21.

[0039] As shown in Figure 2As shown, a connecting reinforcing arm 24 is arranged between two adjacent elastic expansion parts 222 and has an opening facing the central cylindrical part 21. One end of the connecting reinforcing arm 24 is connected with the outer end of one of the elastic expansion parts 222 and the central cylindrical part 21, and the other end is connected with the inner side of the other elastic expansion part 222 and separated from the central cylindrical part 21. Correspondingly, an elastic cavity 25 is formed between the connecting reinforcing arm 24, the central cylindrical part 21 and the corresponding elastic expansion part, so as to effectively improve the structural elasticity and recovery ability of the connecting reinforcing arm 24.

[0040] It should be noted that the flexible fireproof filler 4 includes a plurality of internally built fillers 41 and externally laid fillers 42. The corresponding internally built filler 41 is located between the adjacent two elastic expansion parts 222, the connecting reinforcing arm 24 and the wire 1, and the externally laid filler 42 is located between the corresponding wire 1 and the protective sheath layer 3 and contacts the adjacent arc-shaped separation body 22, so that the flexible fireproof filler 4 composed of the externally laid filler 42 and the internally built filler 41 can not only buffer the external forces such as impact and stress pressure, but also significantly improve the fireproof performance of the wire 1.

[0041] The preparation method for manufacturing the high-strength and high-flame-retardant cable includes the following steps:

[0042] S1, preparing the wire 1, twisting the conductive copper wire to form a copper wire conductor, and using copper wire to weave a conductor protection layer outside the copper wire conductor, and using a continuous sulfur production process to perform three-layer co-extrusion of a conductor shielding layer, an insulation layer and an insulation shielding layer outside the conductor protection layer to form the wire 1;

[0043] S2, preparing the separation frame body 2, mixing 30 parts of polyethylene, 70 parts of ethylene propylene diene rubber, 0.3 parts of vulcanizing agent, 0.8 parts of reinforcing agent and 4.9 parts of accelerator by weight, melting and then obtaining the frame body material through a flat vulcanizing machine, and then preheating the frame body material to 70°C and adding it through a mold to obtain the frame body;

[0044] S3, assembling and forming, embedding the flexible fireproof filler 4 and the plurality of wires 1 into the separation frame body 2, and then covering the protective sheath layer 3, so that the protective sheath layer 3 is connected and fixed with the separation frame body 2, and then the flame-retardant layer 5 and the wear-resistant sleeve layer 6 are covered in sequence.

[0045] Example Two

[0046] The difference between Example Two and Example One is that the preparation method for manufacturing the high-strength and high-flame-retardant cable in Example Two includes the following steps:

[0047] S1, preparing the wire 1, twisting the conductive copper wire to form a copper conductor, and using copper wire to braid a conductor protection layer outside the copper conductor, and using a continuous sulfur production process to co-extrude a conductor shielding layer, an insulation layer and an insulation shielding layer outside the conductor protection layer to form the wire 1;

[0048] S2, preparing the partition frame body 2, mixing 35 parts of polyethylene, 75 parts of ethylene propylene rubber, 0.4 parts of vulcanizing agent, 1 part of reinforcing agent and 5.6 parts of accelerator by weight, melting and then passing through a flat vulcanizing machine to obtain frame material, and then preheating the frame material to 70°C and adding it through a mold to obtain;

[0049] S3, assembling and forming, embedding the flexible fireproof filler 4 and the plurality of wires 1 in the partition frame body 2, and then covering the protective sleeve layer 3, and then covering the flame retardant layer 5 and the wear-resistant sleeve layer 6 after the protective sleeve layer 3 is connected and fixed with the partition frame body 2.

[0050] Example three

[0051] The difference between example three and example one is that the preparation method for manufacturing a high-strength and high-flame-retardant cable in example three includes the following steps:

[0052] S1, preparing the wire 1, twisting the conductive copper wire to form a copper conductor, and using copper wire to braid a conductor protection layer outside the copper conductor, and using a continuous sulfur production process to co-extrude a conductor shielding layer, an insulation layer and an insulation shielding layer outside the conductor protection layer to form the wire 1;

[0053] S2, preparing the partition frame body 2, mixing 35 parts of polyethylene, 75 parts of ethylene propylene rubber, 0.4 parts of vulcanizing agent, 1 part of reinforcing agent and 5.6 parts of accelerator by weight, melting and then passing through a flat vulcanizing machine to obtain frame material, and then preheating the frame material to 70°C and adding it through a mold to obtain;

[0054] S3, assembling and forming, embedding the flexible fireproof filler 4 and the plurality of wires 1 in the partition frame body 2, and then covering the protective sleeve layer 3, and then covering the flame retardant layer 5 and the wear-resistant sleeve layer 6 after the protective sleeve layer 3 is connected and fixed with the partition frame body 2.

[0055] Example four

[0056] The difference between example four and example one is that the inner side of the center ball part in example four is solid.

[0057] Example five

[0058] The difference between example five and example one is that the two sides of the connecting protrusion 23 in example five are provided with tooth-shaped ends 231 for embedding in the protective sleeve layer 3.

[0059] Example six

[0060] The difference between embodiment six and embodiment one is that the two sides of the connecting protrusion 23 in embodiment six are provided with arc-shaped ends 232 for embedding into the protective sheath layer 3.

[0061] In summary, the present application provides a high-strength and high-flame-retardant cable. The flexible fireproof filling material 4 plays a role in buffering impact and stress pressure while significantly improving the fireproof performance of the conductor 1. The multiple conductors 1 are separated by the partition frame 2 to avoid the problem of abnormal resistance and strength reduction caused by abrasion and heat accumulation under mutual interaction. In terms of arc-shaped partition cavities, the conductors 1 are uniformly distributed in the center of the high-strength and high-flame-retardant cable by the multiple arc-shaped partitions 22 with equal arc distribution. The elastic recovery force generated by the arc-shaped partitions 22 after deformation clamps the corresponding conductors 1, thereby improving the stability of the conductors 1 in the high-strength and high-flame-retardant cable and resetting in time after relative movement to achieve the effect of buffering impact force and stress pressure for a long time. At the same time, the corresponding ends of the multiple arc-shaped partitions 22 with equal arc distribution are connected to each other, and the other ends are connected and fixed with the protective sheath layer 3, so that the arc-shaped partitions 22 have the effect of stable connection structure, and the elastic recovery force formed by the expansion elastic part 222 with an inner diameter larger than the diameter of the conductor 1 after stress deformation effectively supports and limits the conductor 1 to reset in time while buffering impact and stress pressure if the conductor 1 moves relatively. The matching positioning part 221 with an inner diameter matching the diameter of the conductor 1 realizes the effect of maximizing the contact surface and dispersing impact force and stress pressure when matching and connecting the corresponding conductor 1.

[0062] It should be noted that in terms of the connection of the protective sheath layer 3 and the arc-shaped separator 22, the connection and fixation of the connection protrusion 23 and the protective sheath layer 3 will significantly reduce the difficulty of preparation of the high-strength and high-flame-retardant cable, while the tooth-shaped end 231 and / or the arc-shaped end 232 will improve the connection and fixation stability of the connection protrusion 23 and the protective sheath layer 3 and form a fixed angle with the flexible fireproof filler 4, so as to further reduce the difficulty of preparation of the high-strength and high-flame-retardant cable; and the center cylindrical part 21 at the center part of the arc-shaped separator 22 connects multiple arc-shaped separators 22 to improve the elasticity and connection structure stability of the arc-shaped separator 22, and the center hole 211 realizes the optimization of materials and the effective buffering of impact force and stress, or realizes the strength improvement of the inside material; at the same time, the connection reinforcing arm 24 in the expansion elastic part 222 plays a role in further improving the structural stability of the expansion elastic part 222, and when the expansion elastic part 222 deforms due to external force, the elastic restoring force of the expansion elastic part 222 itself and the connection reinforcing arm 24 play a role in timely resetting the expansion elastic part 222, and the elastic inner cavity 25 improves the structural elasticity and restoring capacity of the connection reinforcing arm 24.

[0063] In terms of the arrangement of the flexible fireproof filler 4, the flexible fireproof filler 4 composed of multiple pairs of built-in fillers 41 and externally laid fillers 42 is filled between the arc-shaped separator 22, the wire 1 and the protective sheath layer 3, thereby playing a role in relieving external force impact, efficient resetting and ensuring high flame retardancy.

[0064] In the high-strength and high-flame-retardant cable, in order to improve its performance, the flame-retardant layer 5 plays a flame-retardant effect, the wear-resistant sleeve layer 6 plays a wear-resistant effect, and the multiple equi-radian distributed spiral protrusions 32 on the outside of the protective sheath layer 3 cooperate with the flame-retardant layer 5 to form multiple spaced grooves 33, so as to achieve the purposes of wear resistance, flame retardancy, improvement of structural strength and relief of external force.

[0065] Among them, through the preparation of the wire 1 and the preparation of the separator frame 2, and then combining the wire 1, the separator frame 2 and the flexible fireproof filler 4, and then covering the protective sheath layer 3, the inside of the protective sheath layer 3 is connected with the connection protrusion 23 of the separator frame 2, so as to form a connection cavity 31 matched with the connection protrusion 23 on the inside of the protective sheath layer 3, which has the effect of significantly improving the connection and fixation stability, and then the flame-retardant layer 5 and the wear-resistant sleeve layer 6 are sequentially covered to achieve the purposes of high flame retardancy and high wear resistance.

[0066] The use of "first", "second", "third", "fourth" etc. (if any) in this disclosure is only to distinguish similar objects, and does not necessarily indicate a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods or devices.

[0067] It should be noted that the description involving "first", "second" and the like in this application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed in this application.

[0068] The principles and implementation modes of the present application are described by applying specific examples herein, and the above description of the examples is only for the purpose of helping to understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in specific implementation modes and application scope, and the above description of the present application should not be understood as a limitation.

Claims

1. A high strength high flame retardant cable comprising a plurality of conductors (1) and a jacket layer (3) surrounding the plurality of conductors (1), characterized in that: The inner side of the protective sheath layer (3) is connected and fixed with a partition frame body (2), which is used for separating multiple wires (1) with equal arc at the inner side of the protective sheath layer (3), and the outer side of the wire (1) is wrapped with a flexible fireproof filling material (4) between the protective sheath layer (3) and the partition frame body (2); the partition frame body (2) comprises multiple arc-shaped partition bodies (22) with equal arc, multiple wires (1) are respectively located between and abutted by corresponding two arc-shaped partition bodies (22), and one end of the multiple arc-shaped partition bodies (22) close to each other is connected with each other, and the other end is connected and fixed with the protective sheath layer (3); the arc-shaped partition body (22) comprises an expanded elastic portion (222) with an inner diameter greater than the diameter of the wire (1) and a matching positioning portion (221) with an inner diameter matched with the diameter of the wire (1), and the outer side of the matching positioning portion (221) is provided with a connecting protrusion (23) for connecting and fixing with the inner side of the protective sheath layer (3); the outer side of the protective sheath layer (3) is sequentially provided with a flame-retardant layer (5) and a wear-resistant sheath layer (6); the inner side of the protective sheath layer (3) is provided with multiple connecting cavities (31) matched with corresponding connecting protrusions (23); the outer side of the protective sheath layer (3) is provided with multiple spiral protrusions (32) with equal arc, and a spacing groove (33) is formed between adjacent two spiral protrusions (32) between the flame-retardant layer (5) and the protective sheath layer (3).

2. A high strength, high flame retardant cable according to claim 1, characterized in that: The two sides of the connecting protrusion (23) are respectively provided with a tooth-shaped end (231) and / or an arc-shaped end (232) for embedding into the protective sheath layer (3), and the tooth-shaped end (231) and / or the arc-shaped end (232) form an included angle with the outer side of the matching positioning portion (221), and the outer side of the flexible fireproof filling material (4) is embedded into the included angle and contacts the inner side of the protective sheath layer (3).

3. A high strength, high flame retardant cable according to claim 1, characterized in that: The partition frame body (2) comprises a center cylindrical portion (21), and multiple arc-shaped partition bodies (22) with equal arc are distributed on the outer circumferential side wall of the center cylindrical portion (21); the inner side of the center cylindrical portion (21) is provided with a center hole (211) or is in a solid state.

4. A high strength, high flame retardant cable according to claim 3, characterized in that: An connecting reinforcing arm (24) with an opening facing the center cylindrical portion (21) is arranged between adjacent two expanded elastic portions (222), one end of the connecting reinforcing arm (24) is connected with the outer end of one of the expanded elastic portions (222) and the center cylindrical portion (21), and the other end is connected with the inner side of the other expanded elastic portion (222) and separated from the center cylindrical portion (21); the connecting reinforcing arm (24), the center cylindrical portion (21) and the corresponding elastic expanded portion form an elastic inner cavity (25).

5. A high strength, high flame retardant cable according to claim 3, wherein: The flexible fireproof filler (4) comprises a plurality of mutually paired built-in fillers (41) and externally laid fillers (42); the corresponding built-in filler (41) is located between two adjacent expansion elastic parts (222), connecting reinforcing arms (24) and wires (1), and the externally laid filler (42) is located between the corresponding wire (1) and protective sheath layer (3), and is in contact with adjacent arc-shaped separators (22).

6. A high strength, high flame retardant cable according to claim 1, wherein, The preparation method steps for manufacturing high-strength high-flame-retardant cables include: S1, preparing a wire (1), twisting a copper wire to form a copper wire conductor, and using a copper wire to weave a conductor protective layer outside the copper wire conductor, and using a continuous sulfur production process to perform three-layer co-extrusion of a conductor shielding layer, an insulation layer and an insulation shielding layer to form the wire (1); S2, preparing a separation frame body (2), mixing 30-40 parts by weight of polyethylene, 70-80 parts by weight of ethylene propylene diene rubber and 6-8 parts of additives, melting and then passing through a flat vulcanizing machine to obtain frame material, and then preheating the frame material to 70°C and adding it through a mold to obtain; S3, assembling and forming, embedding the flexible fireproof filler (4) and a plurality of wires (1) into the separation frame body (2), and then covering the protective sheath layer (3), and then sequentially covering the flame-retardant layer (5) and the wear-resistant sheath layer (6) after the protective sheath layer (3) is connected and fixed with the separation frame body (2); wherein the additives include 0.3-0.5 parts of a vulcanizing agent, 0.8-1.2 parts of a reinforcing agent and 4.9-6.3 parts of an accelerator.

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