A multi-strand silver braided wire with tensile and breakage resistance and braiding process

Abstract

The present invention discloses a multi-strand silver braided wire with tensile and fracture resistance, comprising a glass fiber core wire, a copper core and an insulating sheath, wherein the glass fiber core wire and the copper core are arranged inside the insulating sheath, and the outer circumferential side of the copper core is plated with a metallic silver layer. The multi-strand silver braided wire with tensile and fracture resistance can improve the tensile and fracture resistance through the external insulating sheath, and the addition of polyaryl phosphate in the insulating sheath can improve the heat resistance, wear resistance and flame retardancy, and form an efficient heat conduction network through the mixed dispersion of boron nitride and aluminum oxide, improve the thermal conductivity, and ensure the heat dissipation efficiency, while the addition of maleic anhydride grafted polyolefin can effectively improve the toughness, and the tensile strength is improved by using the reinforcing core of Kevlar fiber, and the twisted braiding process is combined, so that the wire has the physical properties of ensuring tensile resistance, high thermal conductivity, flame retardancy and high toughness, effectively preventing fracture and extending the service life, and reducing the damage and discarding rate, thereby reducing pollution to the environment, which is beneficial to environmental protection.

Description

Technical Field

[0001] The invention relates to the technical field of silver braided wires, in particular to a multi-strand silver braided wire with tensile and fracture resistance and a braiding process. Background Art

[0002] Silver braided wire is a kind of wire coated with silver. In daily use, multiple strands of silver braided wire are woven into a wire harness. Silver braided wire is widely used in stage speakers and new energy vehicles on the market.

[0003] However, the current ability of silver braided wire to resist tensile stress and fracture is relatively poor. During use, the silver braided wire is prone to fracture when subjected to tension, lacking effective tensile resistance. At the same time, when the silver braided wire is often wound and stored, it is easy to cause creases, which makes it easy to fracture, affecting the service life of the silver braided wire. The broken and damaged silver braided wire is usually discarded, which is easy to cause environmental pollution and is not conducive to environmental protection.

[0004] In view of this, in order to solve the above problems, in-depth research was conducted and a multi-strand silver braided wire with tensile and fracture resistance and a braiding process were proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-strand silver braided wire and a braiding process with tensile and break resistance to solve the problem in the above background technology that the existing silver braided wire has poor tensile and break resistance and is easy to be damaged, thus causing environmental pollution and being not conducive to environmental protection.

[0006] To achieve the above object, the present invention provides the following technical solution: a multi-strand silver braided wire with tensile resistance and anti-fracture, comprising a glass fiber core wire, a copper core and an insulating sheath, wherein the glass fiber core wire and the copper core are arranged inside the insulating sheath, characterized in that:

[0007] The outer circumferential side of the copper core is plated with a metal silver layer, and the copper core is provided with multiple strands with the glass fiber core wire as the center, and a reinforcing core is abutted between two adjacent metal silver layers;

[0008] The copper core and the reinforcing core are tightly spirally wound and woven on the surface of the glass fiber core wire along the length direction of the glass fiber core wire;

[0009] The glass fiber core wire, the copper core, and the gaps between the reinforcing core and the insulating sheath are filled with flame retardant adhesive.

[0010] As a preferred technical solution of the present invention, the inner wall surface of the insulating sheath is evenly and equidistantly provided with stabilizing blocks, and the stabilizing blocks are transversely penetrated with through holes;

[0011] The through hole is located at the center of the stabilizing block, and the structural shape of the through hole is consistent with the shape of the outer surface formed after the copper core and the reinforcing core are wound, and the copper core and the reinforcing core are arranged through the through hole.

[0012] As a preferred technical solution of the present invention, the insulating sheath is a composite material prepared by uniformly mixing thermoplastic polyurethane as a raw material with polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin.

[0013] As a preferred technical solution of the present invention, the method for preparing the composite material comprises the following steps:

[0014] S1: placing the thermoplastic polyurethane granular material in a heating furnace and heating it into a molten state at a heating temperature of 190-220°C;

[0015] S2: placing the thermoplastic polyurethane heated to a molten state in a mixer, and adding polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin in proportion, stirring and mixing, and then extruding and granulating through a screw extruder to obtain a finished product, wherein the temperature of the feed section of the screw extruder is 150°C to 170°C, the temperature of the compression section is 170°C to 190°C, the temperature of the peristaltic section is 190°C to 220°C, the temperature of the die section is 220°C to 240°C, and the aspect ratio of the machine screw is 20:1.

[0016] As a preferred technical solution of the present invention, in step S2, the weight ratio of thermoplastic polyurethane, polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin is 1:0.3:0.2:0.15:0.1, and the stirring speed is controlled to 400-500 r / min and the stirring time is 20-30 min.

[0017] As a preferred technical solution of the present invention, the material of the reinforcing core is Kevlar fiber.

[0018] A weaving process of a multi-strand silver braided wire with tensile and fracture resistance, comprising the following steps:

[0019] Step 1: Select a glass fiber core wire, and distribute multiple copper cores at equal angles on the outside of the glass fiber core wire, and place the reinforcing core between the connected copper cores, and spirally wrap the copper core and the reinforcing core and weave them on the outside of the glass fiber core wire;

[0020] Step 2: Put the winding, twisting and braiding glass fiber core wire, copper core and reinforcing core on the set of stabilizing blocks, and evenly set the stabilizing blocks at equal distances;

[0021] Step 3: Place the glass fiber core wire, copper core and reinforcing core of the set stabilizing block in the mold, add flame retardant adhesive, and demould after the flame retardant adhesive solidifies;

[0022] Step 4: Extruding the prepared composite material and sheathing it on the outside of the rubber agent to form an insulating sheath.

[0023] As a preferred technical solution of the present invention, in the step 1, the number of turns of the copper core and the reinforcing core wrapped around the glass fiber core wire is 3 to 5 turns / 10 mm.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the multi-strand silver braided wire with tensile and fracture resistance can improve the tensile and fracture resistance through the external insulating sheath, the addition of polyaryl phosphate in the insulating sheath can improve the heat resistance, wear resistance and flame retardancy, and a high-efficiency thermal conductive network is formed by the mixed dispersion of boron nitride and aluminum oxide, the thermal conductivity is improved, and the heat dissipation efficiency is guaranteed, while the addition of maleic anhydride grafted polyolefin can effectively improve the toughness, and the tensile strength is improved by using a Kevlar fiber reinforcement core, and the twisted braiding process is combined, so it has the physical properties of ensuring tensile resistance, high thermal conductivity, flame retardancy and high toughness, effectively preventing fracture and extending the service life, reducing the damage and discarding rate, thereby reducing pollution to the environment, which is beneficial to environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the side cross-sectional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the main cross-sectional connection structure of the insulating sheath and the stabilizing block of the present invention;

[0027] Figure 3 This is a schematic diagram of the three-dimensional connection structure between the insulating sheath and the stabilizing block of the present invention;

[0028] Figure 4 This is a performance test result diagram of the present invention.

[0029] In the figure: 1. Glass fiber core wire; 2. Copper core; 3. Insulation sheath; 4. Metal silver layer; 5. Reinforcement core; 6. Stabilizing block; 7. Through hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] See also Figure 1-3The technical solution of the present invention is as follows: a multi-strand silver braided wire with tensile and fracture resistance, comprising a glass fiber core wire 1, a copper core 2 and an insulating sheath 3, the glass fiber core wire 1 and the copper core 2 are arranged inside the insulating sheath 3, the circumferential outer side surface of the copper core 2 is plated with a metal silver layer 4, and the copper core 2 is arranged with multiple strands around the glass fiber core wire 1, and a reinforcing core 5 is abutted between two adjacent metal silver layers 4, the copper core 2 and the reinforcing core 5 are tightly spirally wound and woven on the surface of the glass fiber core wire 1 along the length direction of the glass fiber core wire 1, and the gaps between the glass fiber core wire 1 and the copper core 2 and the reinforcing core 5 and the insulating sheath 3 are filled with flame retardant adhesive.

[0033] The inner wall surface of the insulating sheath 3 is evenly and evenly provided with stabilizing blocks 6, and a through hole 7 is transversely opened on the stabilizing block 6, and the through hole 7 is located at the center of the stabilizing block 6, and the structural shape of the through hole 7 is consistent with the shape of the outer surface formed after the copper core 2 and the reinforcing core 5 are wound, and the copper core 2 and the reinforcing core 5 are arranged through the through hole 7;

[0034] The insulating sheath 3 is a composite material prepared by uniformly mixing thermoplastic polyurethane with polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin;

[0035] The preparation of the composite material includes the following steps:

[0036] S1: placing the thermoplastic polyurethane granular material in a heating furnace and heating it into a molten state at a heating temperature of 190°C;

[0037] S2: placing the thermoplastic polyurethane heated to a molten state in a mixer, and adding polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin in proportion, stirring and mixing, and then extruding and granulating through a screw extruder to obtain a finished product, wherein the temperature of the feed section of the screw extruder is 150° C., the temperature of the compression section is 170° C., the temperature of the peristaltic section is 190° C., the temperature of the die section is 220° C., and the aspect ratio of the screw of the machine is 20:1;

[0038] In step S2, the weight ratio of thermoplastic polyurethane, polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin is 1:0.3:0.2:0.15:0.1, and the stirring speed is controlled to be 400 r / min and the stirring time is 30 min.

[0039] The material of the reinforcing core 5 is Kevlar fiber.

[0040] A weaving process of a multi-strand silver braided wire with tensile and fracture resistance, comprising the following steps:

[0041] Step 1: Select a glass fiber core wire 1, and distribute multiple copper cores 2 at equal angles on the outside of the glass fiber core wire 1, and place a reinforcing core 5 between the connected copper cores 2, and spirally wrap the copper core 2 and the reinforcing core 5 and weave them on the outside of the glass fiber core wire 1;

[0042] Step 2: Put the winding, twisted and braided glass fiber core wire 1, copper core 2 and reinforcing core 5 on the stabilizing block 6, and evenly arrange the stabilizing blocks 6 at equal distances;

[0043] Step 3: Place the glass fiber core wire 1, copper core 2 and reinforcing core 5 with the stabilizing block 6 in a mold, add flame retardant adhesive, and demould after the flame retardant adhesive solidifies;

[0044] Step 4: The prepared composite material is extruded and sheathed on the outside of the rubber agent to form an insulating sheath 3.

[0045] In step 1, the copper core 2 and the reinforcing core 5 are wrapped around the glass fiber core wire 1 with a number of turns of 3 / 10 mm.

[0046] Embodiment 2

[0047] See also Figure 1-3 The technical solution of the present invention is as follows: a multi-strand silver braided wire with tensile and fracture resistance, comprising a glass fiber core wire 1, a copper core 2 and an insulating sheath 3, the glass fiber core wire 1 and the copper core 2 are arranged inside the insulating sheath 3, the circumferential outer side surface of the copper core 2 is plated with a metal silver layer 4, and the copper core 2 is arranged with multiple strands around the glass fiber core wire 1, and a reinforcing core 5 is abutted between two adjacent metal silver layers 4, the copper core 2 and the reinforcing core 5 are tightly spirally wound and woven on the surface of the glass fiber core wire 1 along the length direction of the glass fiber core wire 1, and the gaps between the glass fiber core wire 1 and the copper core 2 and the reinforcing core 5 and the insulating sheath 3 are filled with flame retardant adhesive.

[0048] The inner wall surface of the insulating sheath 3 is evenly and evenly provided with stabilizing blocks 6, and a through hole 7 is transversely opened on the stabilizing block 6, and the through hole 7 is located at the center of the stabilizing block 6, and the structural shape of the through hole 7 is consistent with the shape of the outer surface formed after the copper core 2 and the reinforcing core 5 are wound, and the copper core 2 and the reinforcing core 5 are arranged through the through hole 7;

[0049] The insulating sheath 3 is a composite material prepared by uniformly mixing thermoplastic polyurethane with polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin;

[0050] The preparation of the composite material includes the following steps:

[0051] S1: placing the thermoplastic polyurethane granular material in a heating furnace and heating it into a molten state at a heating temperature of 200°C;

[0052] S2: placing the thermoplastic polyurethane heated to a molten state in a mixer, and adding polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin in proportion, stirring and mixing, and then extruding and granulating through a screw extruder to obtain a finished product, wherein the temperature of the feed section of the screw extruder is 160° C., the temperature of the compression section is 180° C., the temperature of the peristaltic section is 200° C., the temperature of the die section is 230° C., and the aspect ratio of the screw of the machine is 20:1;

[0053] In step S2, the weight ratio of thermoplastic polyurethane, polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin is 1:0.3:0.2:0.15:0.1, and the stirring speed is controlled to be 450 r / min and the stirring time is 25 min.

[0054] The material of the reinforcing core 5 is Kevlar fiber.

[0055] A weaving process of a multi-strand silver braided wire with tensile and fracture resistance, comprising the following steps:

[0056] Step 1: Select a glass fiber core wire 1, and distribute multiple copper cores 2 at equal angles on the outside of the glass fiber core wire 1, and place a reinforcing core 5 between the connected copper cores 2, and spirally wrap the copper core 2 and the reinforcing core 5 and weave them on the outside of the glass fiber core wire 1;

[0057] Step 2: Put the winding, twisted and braided glass fiber core wire 1, copper core 2 and reinforcing core 5 on the stabilizing block 6, and evenly arrange the stabilizing blocks 6 at equal distances;

[0058] Step 3: Place the glass fiber core wire 1, copper core 2 and reinforcing core 5 with the stabilizing block 6 in a mold, add flame retardant adhesive, and demould after the flame retardant adhesive solidifies;

[0059] Step 4: The prepared composite material is extruded and sheathed on the outside of the rubber agent to form an insulating sheath 3.

[0060] In step 1, the copper core 2 and the reinforcing core 5 are wrapped around the glass fiber core wire 1 with a number of turns of 4 / 10 mm.

[0061] Embodiment 3

[0062] A multi-strand silver braided wire with tensile and fracture resistance comprises a glass fiber core wire 1, a copper core 2 and an insulating sheath 3. The glass fiber core wire 1 and the copper core 2 are arranged inside the insulating sheath 3. The circumferential outer side surface of the copper core 2 is plated with a metal silver layer 4. The copper core 2 is arranged in multiple strands with the glass fiber core wire 1 as the center, and a reinforcing core 5 is abutted between two adjacent metal silver layers 4. The copper core 2 and the reinforcing core 5 are tightly spirally wound and woven on the surface of the glass fiber core wire 1 along the length direction of the glass fiber core wire 1. The gaps between the glass fiber core wire 1 and the copper core 2 and between the reinforcing core 5 and the insulating sheath 3 are filled with a flame retardant adhesive.

[0063] The inner wall surface of the insulating sheath 3 is evenly and evenly provided with stabilizing blocks 6, and a through hole 7 is transversely opened on the stabilizing block 6, and the through hole 7 is located at the center of the stabilizing block 6, and the structural shape of the through hole 7 is consistent with the shape of the outer surface formed after the copper core 2 and the reinforcing core 5 are wound, and the copper core 2 and the reinforcing core 5 are arranged through the through hole 7;

[0064] The insulating sheath 3 is a composite material prepared by uniformly mixing thermoplastic polyurethane with polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin;

[0065] The preparation of the composite material includes the following steps:

[0066] S1: placing the thermoplastic polyurethane granular material in a heating furnace and heating it into a molten state at a heating temperature of 210°C;

[0067] S2: placing the thermoplastic polyurethane heated to a molten state in a mixer, and adding polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin in proportion, stirring and mixing, and then extruding and granulating through a screw extruder to obtain a finished product, wherein the temperature of the feed section of the screw extruder is 160° C., the temperature of the compression section is 180° C., the temperature of the peristaltic section is 210° C., the temperature of the die section is 230° C., and the aspect ratio of the screw of the machine is 20:1;

[0068] In step S2, the weight ratio of thermoplastic polyurethane, polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin is 1:0.3:0.2:0.15:0.1, and the stirring speed is controlled to be 500 r / min and the stirring time is 20 min.

[0069] The material of the reinforcing core 5 is Kevlar fiber.

[0070] A weaving process of a multi-strand silver braided wire with tensile and fracture resistance, comprising the following steps:

[0071] Step 1: Select a glass fiber core wire 1, and distribute multiple copper cores 2 at equal angles on the outside of the glass fiber core wire 1, and place a reinforcing core 5 between the connected copper cores 2, and spirally wrap the copper core 2 and the reinforcing core 5 and weave them on the outside of the glass fiber core wire 1;

[0072] Step 2: Put the winding, twisted and braided glass fiber core wire 1, copper core 2 and reinforcing core 5 on the stabilizing block 6, and evenly arrange the stabilizing blocks 6 at equal distances;

[0073] Step 3: Place the glass fiber core wire 1, copper core 2 and reinforcing core 5 with the stabilizing block 6 in a mold, add flame retardant adhesive, and demould after the flame retardant adhesive solidifies;

[0074] Step 4: The prepared composite material is extruded and sheathed on the outside of the rubber agent to form an insulating sheath 3.

[0075] In step 1, the copper core 2 and the reinforcing core 5 are wrapped around the glass fiber core wire 1 with a number of turns of 4 / 10 mm.

[0076] Embodiment 4

[0077] See also Figure 1-3 The technical solution of the present invention is as follows: a multi-strand silver braided wire with tensile and fracture resistance, comprising a glass fiber core wire 1, a copper core 2 and an insulating sheath 3, the glass fiber core wire 1 and the copper core 2 are arranged inside the insulating sheath 3, the circumferential outer side surface of the copper core 2 is plated with a metal silver layer 4, and the copper core 2 is arranged with multiple strands around the glass fiber core wire 1, and a reinforcing core 5 is abutted between two adjacent metal silver layers 4, the copper core 2 and the reinforcing core 5 are tightly spirally wound and woven on the surface of the glass fiber core wire 1 along the length direction of the glass fiber core wire 1, and the gaps between the glass fiber core wire 1 and the copper core 2 and the reinforcing core 5 and the insulating sheath 3 are filled with flame retardant adhesive.

[0078] The inner wall surface of the insulating sheath 3 is evenly and evenly provided with stabilizing blocks 6, and a through hole 7 is transversely opened on the stabilizing block 6, and the through hole 7 is located at the center of the stabilizing block 6, and the structural shape of the through hole 7 is consistent with the shape of the outer surface formed after the copper core 2 and the reinforcing core 5 are wound, and the copper core 2 and the reinforcing core 5 are arranged through the through hole 7;

[0079] The insulating sheath 3 is a composite material prepared by uniformly mixing thermoplastic polyurethane with polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin;

[0080] The preparation of the composite material includes the following steps:

[0081] S1: placing the thermoplastic polyurethane granular material in a heating furnace and heating it into a molten state at a heating temperature of 220°C;

[0082] S2: placing the thermoplastic polyurethane heated to a molten state in a mixer, and adding polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin in proportion, stirring and mixing, and then extruding and granulating through a screw extruder to obtain a finished product, wherein the temperature of the feed section of the screw extruder is 170° C., the temperature of the compression section is 190° C., the temperature of the peristaltic section is 220° C., the temperature of the die section is 240° C., and the aspect ratio of the screw of the machine is 20:1;

[0083] In step S2, the weight ratio of thermoplastic polyurethane, polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin is 1:0.3:0.2:0.15:0.1, and the stirring speed is controlled to be 500 r / min and the stirring time is 20 min.

[0084] The material of the reinforcing core 5 is Kevlar fiber.

[0085] A weaving process of a multi-strand silver braided wire with tensile and fracture resistance, comprising the following steps:

[0086] Step 1: Select a glass fiber core wire 1, and distribute multiple copper cores 2 at equal angles on the outside of the glass fiber core wire 1, and place a reinforcing core 5 between the connected copper cores 2, and spirally wrap the copper core 2 and the reinforcing core 5 and weave them on the outside of the glass fiber core wire 1;

[0087] Step 2: Put the winding, twisted and braided glass fiber core wire 1, copper core 2 and reinforcing core 5 on the stabilizing block 6, and evenly arrange the stabilizing blocks 6 at equal distances;

[0088] Step 3: Place the glass fiber core wire 1, copper core 2 and reinforcing core 5 with the stabilizing block 6 in a mold, add flame retardant adhesive, and demould after the flame retardant adhesive solidifies;

[0089] Step 4: The prepared composite material is extruded and sheathed on the outside of the rubber agent to form an insulating sheath 3.

[0090] In step 1, the copper core 2 and the reinforcing core 5 are wrapped around the glass fiber core wire 1 with a number of turns of 5 / 10 mm.

[0091] Comparative Example 1

[0092] The preparation of the composite material in this scheme is the same as that in Example 1 except that no polyaryl phosphate is added.

[0093] Comparative Example 2

[0094] The preparation of the composite material in this embodiment is the same as that in Example 1 except that no maleic anhydride grafted polyolefin is added.

[0095] The performance of the multi-strand silver braided wires woven in the above embodiment and the comparative example was tested, and the specific test results are as follows: Figure 4 As shown, the test basis and test conditions of various properties are as follows: hardness is measured according to GB / T531.1, tensile strength and elongation at break are measured according to GB / T2951.12, thermal shock resistance is measured according to GB / T2951.31 under the condition of (150±1℃)×3h, flame retardancy is measured according to UL94 fire test, thermal deformation is measured according to UL1581 standard at 150℃, and tear strength is measured according to GB / T529;

[0096] According to the test results, the addition of polyaryl phosphate and maleic anhydride grafted polyolefin can effectively improve the heat resistance, wear resistance and flame retardancy, improve toughness, and improve tensile strength and fracture resistance. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0097] 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. A multi-strand silver braided wire with tensile and fracture resistance, comprising a glass fiber core wire (1), a copper core (2) and an insulating sheath (3), wherein the glass fiber core wire (1) and the copper core (2) are arranged inside the insulating sheath (3), characterized in that: The outer circumferential surface of the copper core (2) is plated with a metal silver layer (4), and the copper core (2) is provided with multiple strands with the glass fiber core wire (1) as the center, and a reinforcing core (5) is abutted between two adjacent metal silver layers (4); The copper core (2) and the reinforcing core (5) are tightly spirally wound and woven on the surface of the glass fiber core wire (1) along the length direction of the glass fiber core wire (1); The gaps between the glass fiber core wire (1), the copper core (2), the reinforcing core (5) and the insulating sheath (3) are filled with a flame retardant adhesive; The inner wall surface of the insulating sheath (3) is evenly and equidistantly provided with stabilizing blocks (6), and the stabilizing blocks (6) are provided with through holes (7) extending transversely therethrough; The through hole (7) is located at the center of the stabilizing block (6), and the structural shape of the through hole (7) is consistent with the shape of the outer surface formed after the copper core (2) and the reinforcing core (5) are wound, and the copper core (2) and the reinforcing core (5) are arranged to pass through the through hole (7); The insulating sheath (3) is a composite material prepared by uniformly mixing thermoplastic polyurethane as a raw material with polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin; The preparation method of the composite material comprises the following steps: S1: placing the thermoplastic polyurethane granular material in a heating furnace and heating it into a molten state at a heating temperature of 190-220°C; S2: placing the thermoplastic polyurethane heated to a molten state in a mixer, and adding polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin in proportion, stirring and mixing, and then extruding and granulating through a screw extruder to obtain a finished product, wherein the temperature of the feed section of the screw extruder is 150° C. to 170° C., the temperature of the compression section is 170° C. to 190° C., the temperature of the peristaltic section is 190° C. to 220° C., the temperature of the die section is 220° C. to 240° C., and the aspect ratio of the machine screw is 20:1; In step S2, the weight ratio of thermoplastic polyurethane, polyaryl phosphate, boron nitride, aluminum oxide and maleic anhydride grafted polyolefin is 1:0.3:0.2:0.15:0.1, and the stirring speed is controlled to be 400-500 r / min, and the stirring time is 20-30 min; In the step 1, the copper core (2) and the reinforcing core (5) are wound around the glass fiber core wire (1) with a number of turns of 3 to 5 turns / 10 mm.

2. The multi-strand silver braided wire with tensile and fracture resistance according to claim 1, characterized in that: The material of the reinforcing core (5) is Kevlar fiber.

3. A weaving process for a plurality of silver braided wires with tensile and fracture resistance as claimed in any one of claims 1 to 2, characterized in that: The following steps are involved: Step 1: Select a glass fiber core wire (1), and distribute multiple copper cores (2) at equal angles on the outside of the glass fiber core wire (1), and place a reinforcing core (5) between the connected copper cores (2), and spirally wrap the copper core (2) and the reinforcing core (5) around the outside of the glass fiber core wire (1); Step 2: Put the winding, twisting and braiding glass fiber core wire (1), copper core (2) and reinforcing core (5) on the stabilizing block (6), and evenly arrange the stabilizing blocks (6) at equal distances; Step 3: Place the glass fiber core wire (1), copper core (2) and reinforcing core (5) of the set stabilizing block (6) in a mold, add flame retardant adhesive, and demould after the flame retardant adhesive solidifies; Step 4: Extruding the prepared composite material and sheathing it on the outside of the rubber agent to form an insulating sheath (3).

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