Environment-friendly power line with flame-retardant structure

Abstract

The utility model relates to the technical field of power lines, in particular to an environment-friendly power line with a flame-retardant structure, which adopts the technical scheme that the environment-friendly power line comprises leads and an inner sheath, a plurality of leads are wrapped in the inner sheath, a filling layer is arranged between the inner sheath and the leads, an insulating layer is arranged on the outer wall of the inner sheath, and a flame-retardant layer is arranged on the outer wall of the insulating layer. The outer wall of the insulating layer is provided with a steel strand layer, the outer wall of the steel strand layer is provided with a waterproof layer, the outer wall of the waterproof layer is wrapped with a flame-retardant thermal insulation layer, the flame-retardant thermal insulation layer comprises a flame-retardant outer sheath, and the periphery of the inner wall of the flame-retardant outer sheath is provided with notch grooves. The flame-retardant outer sheath is torn through the notch grooves in the inner wall of the flame-retardant outer sheath, so that the effect of conveniently replacing the damaged flame-retardant outer sheath is achieved, the whole power line does not need to be scrapped and replaced, it is guaranteed that the used power line has enough flame-retardant performance, and the service life of the power line is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of power cords, in particular to an environmentally friendly power cord with a flame retardant structure. Background Art

[0002] Power cords are wires that transmit electric current. Usually, the current is transmitted point-to-point. Power cords can be divided into AC power cords and DC power cords according to their uses. Usually, AC power cords are wires that transmit higher voltage alternating current. Due to the higher voltage, these wires need to obtain safety certification according to unified standards before they can be officially produced. DC wires basically transmit lower voltage direct current, so the safety requirements are not as strict as AC wires. However, for safety reasons, countries still require unified safety certification.

[0003] The prior art has the following deficiencies: current power cords are usually wrapped with a flame retardant layer, which can effectively prevent the spread of flames and reduce the hazards of fire in the event of a fire. However, the flame retardant layer wrapped around the outer wall of the power cord will still melt or be damaged to a certain extent when exposed to flames for a long time. The flame retardant performance of the damaged flame retardant layer will be greatly reduced. The traditional flame retardant layer is usually squeezed and wrapped around the outer wall of the power cord during production, so it cannot be replaced. As a result, the existing power cord must be scrapped and the entire power cord must be replaced after a fire to ensure that the power cord in use has sufficient flame retardant performance, which greatly affects the service life of the power cord.

[0004] Therefore, it is necessary to invent an environmentally friendly power cord with a flame retardant structure. Utility Model Content

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an environmentally friendly power cord with a flame-retardant structure, comprising a conductor and an inner sheath, wherein a plurality of conductors are wrapped in the inner sheath, a filling layer is arranged between the inner sheath and the conductor, an insulating layer is arranged on the outer wall of the inner sheath, a steel strand layer is arranged on the outer wall of the insulating layer, a waterproof layer is arranged on the outer wall of the steel strand layer, a flame-retardant heat-insulating layer is wrapped on the outer wall of the waterproof layer, the flame-retardant heat-insulating layer comprises a flame-retardant outer sheath, grooves are arranged around the inner wall of the flame-retardant outer sheath, and when the flame-retardant outer sheath is damaged, the flame-retardant outer sheath can be torn open along the grooves on the inner wall of the flame-retardant outer sheath.

[0006] Preferably, the flame-retardant heat-insulating layer comprises a heat-insulating layer, the heat-insulating layer is woven from glass fibers, and the heat-insulating layer is fixedly bonded to the outer wall of the waterproof layer.

[0007] Preferably, the flame retardant heat-insulating layer comprises a supporting layer, the supporting layer is made of polyethylene material, air holes are arranged around the interior of the supporting layer, and the supporting layer is wrapped around the outer wall of the heat-insulating layer by heating and extruding.

[0008] Preferably, the flame retardant outer sheath is made of cross-linked polyethylene, the groove adopts a V-shaped groove structure, the flame retardant outer sheath is wrapped around the outer wall of the support layer by heating and extruding, and the replaced flame retardant outer sheath is wrapped around the outer wall of the support layer by bonding.

[0009] Preferably, a power plug and a power connector are installed at both ends of the flame-retardant outer sheath, and both ends of the wire extend into the power plug and the power connector, respectively.

[0010] Preferably, a wiring tube is provided on the side of the inner wall of the power plug where the flame retardant outer sheath is inserted, the wiring tube is wrapped around the part of the flame retardant outer sheath that is inserted into the power plug, three pins are installed on the bottom surface of the power plug, and a terminal is installed on the end of the pin that is inserted into the power plug, and several of the wires are respectively connected to the terminal posts.

[0011] Preferably, the filling layer is filled with polyester resin material, the filling layer is filled between the wire and the inner sheath by means of heated injection molding, the inner sheath is made of polyethylene material, and the inner sheath is wrapped around the outer wall of the filling layer by means of heated extrusion.

[0012] Preferably, the insulating layer is wrapped around the outer wall of the inner sheath by means of heated extrusion, the steel strand layer is woven using hot-dip galvanized steel wire, the steel strand layer is fixedly bonded to the outer wall of the insulating layer, a stranded wire interlayer is provided between the steel strand layer and the waterproof layer, the waterproof layer is made of polyethylene, and the waterproof layer is wrapped around the outer wall of the stranded wire interlayer by means of heated extrusion.

[0013] The beneficial effect of the utility model is that when the outermost flame retardant outer sheath is damaged, the flame retardant outer sheath can be torn off through the grooves on the inner wall of the flame retardant outer sheath to facilitate replacement of the damaged flame retardant outer sheath without scrapping and replacing the entire power cord, thereby ensuring that the power cord in use has sufficient flame retardant performance and extending the service life of the power cord. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A front view of an environmentally friendly power cord with a flame retardant structure provided by the utility model;

[0015] Figure 2 An exploded diagram of a power plug of an environmentally friendly power cord with a flame retardant structure provided by the utility model;

[0016] Figure 3 A schematic diagram of the internal structure of an environmentally friendly power cord power plug with a flame retardant structure provided by the utility model;

[0017] Figure 4 A cross-sectional view of an environmentally friendly power cord with a flame retardant structure provided by the utility model;

[0018] Figure 5 This is a cross-sectional view of an environmentally friendly power cord with a flame retardant structure provided by the utility model.

[0019] In the figure: power plug 11, pin 12, power connector 13, terminal 14, wiring tube 15, flame retardant outer sheath 21, support layer 22, heat insulation layer 23, waterproof layer 24, stranded wire interlayer 25, steel strand layer 26, insulating layer 27, inner sheath 28, filling layer 29, conductor 30, groove 31, air hole 32. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] Example 1

[0022] like Figure 1 , Figure 4 and Figure 5 As shown, an environmentally friendly power cord with a flame-retardant structure in an embodiment of the first aspect of the utility model comprises a conductor 30 and an inner sheath 28, wherein a plurality of conductors 30 are wrapped in the inner sheath 28, a filling layer 29 is arranged between the inner sheath 28 and the conductor 30, an insulating layer 27 is arranged on the outer wall of the inner sheath 28, a steel strand layer 26 is arranged on the outer wall of the insulating layer 27, a waterproof layer 24 is arranged on the outer wall of the steel strand layer 26, a flame-retardant heat-insulating layer is wrapped on the outer wall of the waterproof layer 24, the flame-retardant heat-insulating layer comprises a flame-retardant outer sheath 21, and grooves 31 are arranged around the inner wall of the flame-retardant outer sheath 21. When the flame-retardant outer sheath 21 is damaged, the grooves 31 along the inner wall of the flame-retardant outer sheath 21 can tear the flame-retardant outer sheath 21.

[0023] In the above embodiment, it should be noted that when the outermost flame retardant outer sheath 21 is damaged, the flame retardant outer sheath 21 is torn open through the groove 31 on the inner wall of the flame retardant outer sheath 21 to facilitate the replacement of the damaged flame retardant outer sheath 21, without scrapping and replacing the entire power cord, so as to ensure that the power cord used has sufficient flame retardant performance and extend the service life of the power cord.

[0024] Example 2

[0025] like Figure 1 , Figure 4 and Figure 5As shown, an environmentally friendly power cord with a flame retardant structure includes all the contents of Example 1. In addition, the flame retardant heat-insulating layer includes a heat-insulating layer 23, which is woven from glass fiber. The heat-insulating layer 23 is fixedly bonded to the outer wall of the waterproof layer 24. The flame retardant heat-insulating layer includes a supporting layer 22, which is made of polyethylene. The supporting layer 22 is surrounded by air holes 32 inside. The supporting layer 22 is wrapped around the outer wall of the heat-insulating layer 23 by heating and extruding. The flame retardant outer sheath 21 is made of cross-linked polyethylene, and the groove 31 adopts a V-shaped groove structure. The flame retardant outer sheath 21 is wrapped around the outer wall of the supporting layer 22 by heating and extruding. The replaced flame retardant outer sheath 21 is wrapped around the outer wall of the supporting layer 22 by bonding.

[0026] In the above embodiment, it should be noted that the heat insulating layer 23 has the function of isolating external heat to prevent external high temperature from affecting the internal structure; the support layer 22 has the function of strengthening the strength of the environmentally friendly power line. When the power line is squeezed by external force, the pores 32 in the support layer 22 will deform and disperse the impact force to achieve the effect of protecting the internal structure. The pores 32 in the support layer 22 can also isolate external heat to prevent external high temperature from affecting the internal structure; the support layer 22 and the flame retardant outer sheath 21 are both made of flame retardant materials. The flame retardant outer sheath 21 can withstand the high temperature of combustion, but the appearance will also be damaged to a certain extent.

[0027] Example 3

[0028] like Figure 1 - Figure 3 As shown, an environmentally friendly power cord with a flame retardant structure includes all the contents of Example 1. In addition, a power plug 11 and a power connector 13 are respectively installed at both ends of the flame retardant outer sheath 21, and both ends of the wire 30 extend into the power plug 11 and the power connector 13 respectively. A wiring tube 15 is provided on the side of the inner wall of the power plug 11 where the flame retardant outer sheath 21 is inserted. The wiring tube 15 is wrapped around the part of the flame retardant outer sheath 21 inserted into the power plug 11. Three pins 12 are installed on the bottom surface of the power plug 11, and a terminal 14 is installed at one end of the pin 12 inserted into the power plug 11, and a plurality of the wires 30 are respectively connected to the terminal 14.

[0029] In the above embodiment, it should be noted that when the flame retardant outer sheath 21 needs to be replaced, the power plug 11 needs to be disassembled and the flame retardant outer sheath 21 needs to be pulled off from the end of the flame retardant outer sheath 21 close to the wiring tube 15; the pin 12 of the power plug 11 is inserted into the socket hole, so that the wire 30 can be charged.

[0030] Example 4

[0031] like Figure 1 , Figure 4 and Figure 5As shown, an environmentally friendly power cord with a flame retardant structure includes all the contents of Example 1. In addition, the filling layer 29 is filled with polyester resin material, and the filling layer 29 is filled between the conductor 30 and the inner sheath 28 by heating injection molding. The inner sheath 28 is made of polyethylene, and the inner sheath 28 is wrapped around the outer wall of the filling layer 29 by heating extrusion. The insulating layer 27 is wrapped around the outer wall of the inner sheath 28 by heating extrusion. The steel strand layer 26 is woven with hot-dip galvanized steel wire, and the steel strand layer 26 is fixedly bonded to the outer wall of the insulating layer 27. The steel strand layer 26 and the waterproof layer 24 are provided with a stranded wire interlayer 25, and the waterproof layer 24 is made of polyethylene. The waterproof layer 24 is wrapped around the outer wall of the stranded wire interlayer 25 by heating extrusion.

[0032] In the above embodiment, it should be noted that the inner sheath 28 and the filling layer 29 have the function of protecting the conductor 30, the stranded steel wire layer 26 can enhance the tensile strength of the power line, the insulating layer 27 can improve the insulation performance of the power line, and the waterproof layer 24 can improve the waterproof performance of the power line.

[0033] The use process of the utility model is as follows: when the flame retardant outer sheath 21 on the surface of the power cord is damaged by burning, a technician in this field disassembles the power plug 11, tears off the flame retardant outer sheath 21 along the groove 31 from one end of the flame retardant outer sheath 21 close to the wiring tube 15, and then adheres a new flame retardant outer sheath 21 to the surface of the supporting layer 22 to restore the flame retardant performance of the power cord.

[0034] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. An environmentally friendly power cord with a flame retardant structure, comprising a conductor (30) and an inner sheath (28), wherein a plurality of conductors (30) are wrapped in the inner sheath (28), a filling layer (29) is arranged between the inner sheath (28) and the conductors (30), an insulating layer (27) is arranged on the outer wall of the inner sheath (28), a steel strand layer (26) is arranged on the outer wall of the insulating layer (27), and a waterproof layer (24) is arranged on the outer wall of the steel strand layer (26), characterized in that: The outer wall of the waterproof layer (24) is wrapped with a flame retardant heat-insulating layer, and the flame retardant heat-insulating layer includes a flame retardant outer sheath (21). The inner wall of the flame retardant outer sheath (21) is provided with grooves (31) around it. When the flame retardant outer sheath (21) is damaged, the grooves (31) along the inner wall of the flame retardant outer sheath (21) can tear the flame retardant outer sheath (21) apart.

2. The environmentally friendly power cord with a flame retardant structure according to claim 1, characterized in that: The flame retardant heat-insulating layer comprises a heat-insulating layer (23), the heat-insulating layer (23) is woven from glass fibers, and the heat-insulating layer (23) is fixedly bonded to the outer wall of the waterproof layer (24).

3. The environmentally friendly power cord with a flame retardant structure according to claim 2, characterized in that: The flame retardant heat-insulating layer comprises a support layer (22), the support layer (22) is made of polyethylene material, air holes (32) are arranged around the inside of the support layer (22), and the support layer (22) is wrapped around the outer wall of the heat-insulating layer (23) by heating and extruding.

4. The environmentally friendly power cord with a flame retardant structure according to claim 3, characterized in that: The flame retardant outer sheath (21) is made of cross-linked polyethylene, the groove (31) is of a V-shaped groove structure, the flame retardant outer sheath (21) is wrapped around the outer wall of the support layer (22) by means of heating and extrusion, and the replaced flame retardant outer sheath (21) is wrapped around the outer wall of the support layer (22) by means of bonding.

5. The environmentally friendly power cord with a flame retardant structure according to claim 1, characterized in that: A power plug (11) and a power connector (13) are respectively installed at two ends of the flame-retardant outer sheath (21), and two ends of the wire (30) extend into the power plug (11) and the power connector (13) respectively.

6. The environmentally friendly power cord with a flame retardant structure according to claim 5, characterized in that: A wiring tube (15) is provided on the side of the inner wall of the power plug (11) into which the flame retardant outer sheath (21) is inserted, and the wiring tube (15) is wrapped around the portion of the outer surface of the flame retardant outer sheath (21) into which the power plug (11) is inserted, and three plug pins (12) are inserted and installed on the bottom surface of the power plug (11), and a terminal (14) is installed at one end of the plug pin (12) inserted into the power plug (11), and a plurality of the wires (30) are respectively connected to the terminal posts (14).

7. The environmentally friendly power cord with a flame retardant structure according to claim 1, characterized in that: The filling layer (29) is filled with polyester resin material, the filling layer (29) is filled between the conductor (30) and the inner sheath (28) by means of heated injection molding, the inner sheath (28) is made of polyethylene material, and the inner sheath (28) is wrapped around the outer wall of the filling layer (29) by means of heated extrusion.

8. The environmentally friendly power cord with a flame retardant structure according to claim 1, characterized in that: The insulating layer (27) is wrapped around the outer wall of the inner sheath (28) by means of heating and extrusion; the steel strand layer (26) is woven using hot-dip galvanized steel wires; the steel strand layer (26) is fixedly bonded to the outer wall of the insulating layer (27); a stranded wire interlayer (25) is provided between the steel strand layer (26) and the waterproof layer (24); the waterproof layer (24) is made of polyethylene; and the waterproof layer (24) is wrapped around the outer wall of the stranded wire interlayer (25) by means of heating and extrusion.

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