A copper core cross-linked polyethylene flame-retardant cable

Abstract

This utility model relates to the field of cable technology, and in particular to a copper core cross-linked polyethylene flame-retardant cable, comprising an inner sheath, a reinforcing frame fixedly connected inside the inner sheath, and a core assembly penetrating between the inner sheath and the reinforcing frame. The core assembly includes a shielding layer, and an insulation layer fixedly connected inside the shielding layer. This utility model solves the problems of low strength, easy damage to the outer surface and bottom of the cable when subjected to impact or compression, and general protective performance, making it prone to breakage or deformation when cut by sharp blades. Upon impact, the armored steel strip rotates, dissipating the impact force through rotation, effectively improving the cable's impact resistance, extending its service life, and enhancing its overall protective performance. It also possesses good heat insulation and water resistance properties, and when combined with the flame-retardant heat insulation layer, it provides fire protection.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a copper core cross-linked polyethylene flame-retardant cable. Background Technology

[0002] Power cables are cables used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power plant lead-out lines, internal power supply for industrial and mining enterprises, and underwater power transmission lines across rivers and seas. With the significant increase in demand for cables, their safety has also received widespread attention.

[0003] A search revealed that the announcement number is CN212750456U, and the name is a copper core cross-linked polyethylene insulated fire-resistant and flame-retardant cable, which includes an outer sheath, an insulated core, and a conductor. Through research and analysis, it was found that although the cable has environmental protection, heat insulation and waterproof effects, and the heat insulation and waterproof effects are good, improving the practicality of the cable, it still has the following disadvantages to a certain extent.

[0004] For example, if the strength is low, the outer surface and bottom of the cable are easily damaged when subjected to impact or compression. Direct replacement will greatly increase the installation cost and waste unnecessary manpower. If it is not replaced, it will affect the normal operation of the cable. At the same time, the protective performance is average. When it is cut by a sharp blade, it is easy to break or deform. In order to solve the above technical problems, we have designed a copper core cross-linked polyethylene flame retardant cable. Utility Model Content

[0005] The purpose of this utility model is to provide a copper core cross-linked polyethylene flame-retardant cable with the advantages of strong buffering and protection. It solves the problems of low strength, easy damage to the outer surface and bottom of the cable when subjected to impact or compression, and general protection performance, which makes it prone to breakage or deformation when cut by sharp blades.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a copper core cross-linked polyethylene flame-retardant cable, comprising an inner sheath, a reinforcing frame fixedly connected inside the inner sheath, a core assembly passing through the inner sheath and the reinforcing frame, the core assembly including a shielding layer, an insulating layer fixedly connected inside the shielding layer, a copper core fixedly connected inside the insulating layer, a reinforcing layer sleeved on the outer surface of the inner sheath, the reinforcing layer including an armored steel strip, the armored steel strip sleeved on the outer surface of the inner sheath, a reinforcing rotating rod passing through the inner wall of the armored steel strip, an outer spiral groove circumferentially formed on the outer surface of the armored steel strip, a spiral buffer column disposed inside the outer spiral buffer column, a protective layer disposed outside the spiral buffer column, the protective layer including a tear-resistant layer, an inner spiral groove disposed inside the tear-resistant layer, an antifreeze layer sleeved on the outer surface of the tear-resistant layer, and a flame-retardant and heat-insulating layer sleeved on the outer surface of the antifreeze layer.

[0007] Preferably, the shielding layer is made of silicone rubber and the insulating layer is made of cross-linked polyethylene.

[0008] Preferably, the inner sleeve is filled with filler material located between the shielding layer and the reinforcing frame, and a reinforcing core is disposed through the filler material.

[0009] Preferably, the outer surface of the inner sleeve is uniformly provided with an outer rotating groove, and the inner surface of the armored steel strip is uniformly provided with an inner rotating groove, wherein the outer rotating groove and the inner rotating groove have the same specifications.

[0010] Preferably, the reinforcing rotating rod is disposed through the outer rotating groove and the inner rotating groove, and the surface of the reinforcing rotating rod is in sliding contact with the outer rotating groove and the inner rotating groove respectively.

[0011] Preferably, the spiral buffer column is made of rubber, the tear-resistant layer is made of carbon fiber, and the dimensions of the outer spiral groove and the inner spiral groove are matched with those of the spiral buffer column.

[0012] Preferably, the antifreeze layer is made of polystyrene foam, and the flame-retardant and heat-insulating layer is made of polyvinyl chloride.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model protects the inside of the cable with armored steel tape and strengthens the cable with reinforcing rotating rods, making it less prone to bending and deformation. At the same time, the reinforcing rotating rods can rotate between the outer and inner rotating grooves, so that when the cable is impacted, the armored steel tape rotates, and the force generated by the impact is dissipated by the rotation, which effectively improves the impact resistance of the cable and extends the service life of the cable.

[0015] 2. This utility model uses a spiral buffer column to initially buffer the impact on the protective layer. The deformation of the spiral buffer column itself reduces the impact force. At the same time, it is combined with the good buffering performance of the external antifreeze layer to achieve a high-efficiency buffering effect, effectively improving the overall protective performance of the cable. It also has good heat insulation and water resistance properties, and can play a fire prevention role when combined with a flame-retardant heat insulation layer. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is an exploded perspective view of a partial structure of the present invention;

[0018] Figure 3 This is a three-dimensional cross-sectional view of a portion of the protective layer structure of this utility model.

[0019] In the diagram: 1. Inner sleeve; 2. Reinforcing frame; 3. Filler; 4. Reinforcing core; 5. Core assembly; 51. Shielding layer; 52. Insulation layer; 53. Copper core; 6. Reinforcing layer; 61. Armored steel strip; 62. Reinforcing rotating rod; 63. Outer spiral groove; 64. Spiral buffer column; 7. Protective layer; 71. Tear-resistant layer; 72. Inner spiral groove; 73. Antifreeze layer; 74. Flame-retardant and heat-insulating layer; 8. Outer rotating groove. Detailed Implementation

[0020] Please see Figures 1-3 A copper core cross-linked polyethylene flame-retardant cable includes an inner sleeve 1, a reinforcing frame 2 fixedly connected inside the inner sleeve 1, a conductor assembly 5 passing through the inner sleeve 1 and the reinforcing frame 2, the conductor assembly 5 including a shielding layer 51, an insulation layer 52 fixedly connected inside the shielding layer 51, a copper core 53 fixedly connected inside the insulation layer 52, and a reinforcing layer 6 including an armored steel strip 61 fitted onto the outer surface of the inner sleeve 1, the armored steel strip 61 being fitted onto the outer surface of the inner sleeve 1, and a reinforcing rotating rod passing through the inner wall of the armored steel strip 61. 62. The reinforcing rotating rod 62 enables the armored steel belt 61 to rotate. When impacted, it can rotate to dissipate the impact force. The outer surface of the armored steel belt 61 is surrounded by an outer spiral groove 63. The inner part of the outer spiral groove 63 is provided with a spiral buffer column 64. The outer part of the spiral buffer column 64 is provided with a protective layer 7. The protective layer 7 includes a tear-resistant layer 71. The inner part of the tear-resistant layer 71 is provided with an inner spiral groove 72. The outer surface of the tear-resistant layer 71 is covered with an antifreeze layer 73. The outer surface of the antifreeze layer 73 is covered with a flame-retardant and heat-insulating layer 74.

[0021] The shielding layer 51 is made of silicone rubber, which has high and low temperature resistance, shielding properties, and excellent insulation. The insulation layer 52 is made of cross-linked polyethylene, which has heat resistance and its own three-dimensional network structure has excellent heat resistance, which can effectively prevent overheating inside the cable.

[0022] The inner sleeve 1 is filled with filler 3 between the shielding layer 51 and the reinforcing frame 2. The filler 3 is a filling grease, which can effectively ensure that the internal components of the inner sleeve 1 will not shake and play a sealing role. A reinforcing core 4 is installed through the filler 3. The reinforcing core 4 is made of steel wire, which does not have a conductive effect but has the advantage of high strength, effectively ensuring the strength of the cable.

[0023] The outer surface of the inner sleeve 1 is uniformly provided with outer rotating grooves 8, and the inner surface of the armored steel strip 61 is uniformly provided with inner rotating grooves. The outer rotating grooves 8 and the inner rotating grooves have the same specifications.

[0024] The reinforcing rotating rod 62 is disposed between the outer rotating groove 8 and the inner rotating groove, and the surface of the reinforcing rotating rod 62 is in sliding contact with the outer rotating groove 8 and the inner rotating groove respectively. By setting the outer rotating groove 8 and the inner rotating groove, the reinforcing rotating rod 62 can be limited so that it can rotate in its original position, and the reinforcing rotating rod 62 can guide the rotation of the armored steel belt 61, thereby improving the smoothness of the rotation of the armored steel belt 61.

[0025] The spiral buffer column 64 is made of rubber, and the tear-resistant layer 71 is made of carbon fiber. Carbon fiber has the characteristics of high temperature resistance, friction resistance, thermal conductivity and corrosion resistance. The dimensions of the outer spiral groove 63 and the inner spiral groove 72 are matched with the spiral buffer column 64.

[0026] The antifreeze layer 73 is made of polystyrene foam, and the flame-retardant and heat-insulating layer 74 is made of polyvinyl chloride. Polyvinyl chloride has the advantages of flame retardancy, high chemical resistance, good mechanical strength and electrical insulation.

[0027] In use, the internal structure of the cable is protected by the armored steel strip 61, and the cable strength is enhanced by the reinforcing rotating rod 62, making it less prone to bending and deformation. At the same time, the reinforcing rotating rod 62 can rotate between the outer rotating groove 8 and the inner rotating groove, so that when the cable is impacted, the armored steel strip 61 rotates, and the force generated by the impact is dissipated by the rotation, which effectively improves the impact resistance of the cable. The spiral buffer column 64 provides initial buffering against the impact on the protective layer 7. The deformation of the spiral buffer column 64 reduces the impact force. At the same time, the good buffering performance of the outer antifreeze layer 73 is combined to achieve a highly efficient buffering effect, which effectively improves the overall protective performance of the cable. It also has good heat insulation and water resistance properties, and can play a fireproof role when combined with the flame-retardant heat insulation layer 74.

[0028] In summary, this copper core cross-linked polyethylene flame-retardant cable, through the cooperation of the inner sleeve 1, core assembly 5, reinforcing layer 6, protective layer 7 and outer swivel 8, solves the problems of low strength, easy damage to the outer surface and bottom of the cable when subjected to impact or compression, and general protective performance, which makes it prone to breakage or deformation when cut by sharp blades.

Claims

1. A copper core cross-linked polyethylene flame-retardant cable, comprising an inner sheath (1), characterized in that: A reinforcing frame (2) is fixedly connected inside the inner sleeve (1). A wire core assembly (5) is disposed through the inner sleeve (1) and the reinforcing frame (2). The wire core assembly (5) includes a shielding layer (51). An insulating layer (52) is fixedly connected inside the shielding layer (51). A copper core (53) is fixedly connected inside the insulating layer (52). A reinforcing layer (6) is fitted onto the outer surface of the inner sleeve (1). The reinforcing layer (6) includes an armored steel strip (61). The armored steel strip (61) is fitted onto the outer surface of the inner sleeve (1). A reinforcing rotating rod (62) is provided through the inner wall of the belt (61). An outer spiral groove (63) is provided around the outer surface of the armored steel belt (61). A spiral buffer column (64) is provided inside the outer spiral groove (63). A protective layer (7) is provided outside the spiral buffer column (64). The protective layer (7) includes a tear-resistant layer (71). An inner spiral groove (72) is provided inside the tear-resistant layer (71). An antifreeze layer (73) is provided on the outer surface of the tear-resistant layer (71). A flame-retardant and heat-insulating layer (74) is provided on the outer surface of the antifreeze layer (73).

2. The copper core cross-linked polyethylene flame-retardant cable according to claim 1, characterized in that: The shielding layer (51) is made of silicone rubber, and the insulating layer (52) is made of cross-linked polyethylene.

3. The copper core cross-linked polyethylene flame-retardant cable according to claim 1, characterized in that: The inner sleeve (1) is filled with filler material (3) between the shielding layer (51) and the reinforcing frame (2), and a reinforcing core (4) is provided through the interior of the filler material (3).

4. The copper core cross-linked polyethylene flame-retardant cable according to claim 1, characterized in that: The outer surface of the inner sleeve (1) is uniformly provided with an outer rotating groove (8), and the inner surface of the armored steel strip (61) is uniformly provided with an inner rotating groove. The outer rotating groove (8) and the inner rotating groove have the same specifications.

5. A copper core cross-linked polyethylene flame-retardant cable according to claim 4, characterized in that: The reinforcing rotating rod (62) is disposed between the outer rotating groove (8) and the inner rotating groove, and the surface of the reinforcing rotating rod (62) is in sliding contact with the outer rotating groove (8) and the inner rotating groove respectively.

6. The copper core cross-linked polyethylene flame-retardant cable according to claim 1, characterized in that: The spiral buffer column (64) is made of rubber, the tear-resistant layer (71) is made of carbon fiber, and the dimensions of the outer spiral groove (63) and the inner spiral groove (72) are matched with those of the spiral buffer column (64).

7. The copper core cross-linked polyethylene flame-retardant cable according to claim 1, characterized in that: The antifreeze layer (73) is made of polystyrene foam, and the flame-retardant and heat-insulating layer (74) is made of polyvinyl chloride.

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