CN201233748Y - Copper coated aluminum five-core flame-retardant refractory flexible electric cable - Google Patents

Abstract

The utility model is a copper-clad aluminum five-core flame-retardant and fire-resistant flexible cable, which comprises: a conductive wire core with an insulating layer, the cross section of which is tile-shaped; The cable formed by the above-mentioned conductive wire core with an insulating layer, and the cross section of the cable is circular; and a flame-retardant sheath layer extruded on the fire-resistant layer of the cable; The multi-strand conductive monofilament is twisted; the conductive monofilament is composed of an aluminum conductor and a copper cladding (112) covering the aluminum conductor. Wherein, each conductive monofilament in the plurality of conductive monofilaments respectively includes a plurality of conductive monofilaments bundled together to form strands. The cable of the utility model has the advantages of less copper consumption, light weight and low cost.

Description

Copper-clad aluminum five-core flame-retardant fire-resistant flexible cable

technical field

The utility model relates to an electric wire and cable, in particular to a copper-clad aluminum five-core flame-retardant and fire-resistant flexible cable.

Background technique

For the concept of copper-clad aluminum, wire and cable manufacturers are no strangers, that is, the structure of each conductive monofilament that constitutes the conductive core is processed into the outer layer of copper and the inner layer of aluminum, which can save a lot of belongings. Copper, a strategic resource, can make copper play its biggest role. In the literature such as Chinese patent literature, there are many reports in the past, such as: the copper-clad aluminum communication cable introduced by the Chinese patent authorization announcement number CN2881898, the copper-clad aluminum data communication cable disclosed by CN2881899, and the copper-clad aluminum conductor communication cable recommended by CN200979818Y , CN101060024A public copper-clad aluminum conductor or copper-clad steel conductor wire and cable, CN2829026Y disclosed bimetallic conductor monitoring type grounding cable, CN2906844Y disclosed a kind of high-strength copper-clad aluminum wire/cable, as well as CN1758384Y, CN201004349Y, CN2919466Y .

However, due to the small tensile force and low strength of the aluminum material, the copper-clad aluminum conductor wire with a small diameter or a small amount of copper is easily broken and the processing difficulty is significantly increased, or even cannot be processed at all. However, if the diameter is increased or the amount of copper used is increased, the cable will be hardened, which is not conducive to laying.

Contents of the invention

The purpose of the utility model is to provide a copper-clad aluminum five-core flame-retardant and fire-resistant flexible cable which is excellent in flexibility and is conducive to laying, easy to process and safe to use.

According to one aspect of the present invention, the provided copper-clad aluminum five-core flame-retardant and fire-resistant flexible cable includes: a conductive core with an insulating layer, the cross-section of the conductive core is circular; a cable refractory layer, wrapped and stranded A cable formed by combining five conductive wire cores with an insulating layer; and a flame-retardant sheath layer extruded on the fire-resistant layer of the cable; wherein the conductive wire core is formed by twisting multiple conductive monofilaments ; The conductive monofilament is composed of an aluminum conductor and a copper cladding coated on the outside of the aluminum conductor.

Wherein, each conductive monofilament in the plurality of conductive monofilaments respectively includes a plurality of conductive monofilaments bundled together to form strands.

Wherein, a filling rope is filled between the cable refractory layer and the five insulation layers of the five conductive wire cores.

Wherein, a wire core refractory layer is provided between the conductive wire core and the insulating layer, and the wire core refractory layer includes: a mica layer wrapped around the outer surface of the single conductive wire core; and a mica layer wrapped around the mica The outer surface of the layer is a fiberglass layer.

Wherein, the diameter of the conductive monofilament is 0.2-1.2 mm, the diameter of the aluminum conductor is 0.18439-1.10635 mm, and the thickness of the copper cladding is 0.007805-0.04685 mm.

According to the second aspect of the present utility model, the copper-clad aluminum five-core flame-retardant and fire-resistant flexible cable provided includes: a cable formed by twisting five conductive cores with an insulating layer, and the cross-section of the cable is circular with four wire cores of tile-shaped cross-section enclosing a conductive core of circular cross-section; a cable refractory covering said cable; and extruded over said cable refractory The flame-retardant sheath layer; wherein, the conductive wire core is composed of a plurality of conductive monofilament strands; the conductive monofilament is composed of an aluminum conductor and a copper cladding coated outside the aluminum conductor.

Wherein, each conductive monofilament in the plurality of conductive monofilaments respectively includes a plurality of conductive monofilaments bundled together to form strands.

Wherein, a wire core refractory layer is provided between the conductive wire core and the insulating layer, and the wire core refractory layer includes: a mica layer wrapped around the outer surface of the single conductive wire core; and a mica layer wrapped around the mica The outer surface of the layer is a fiberglass layer.

Wherein, the diameter of the conductive monofilament is 0.2-1.2 mm, the diameter of the aluminum conductor is 0.18439-1.10635 mm, and the thickness of the copper cladding is 0.007805-0.04685 mm.

Wherein, the insulating layer is an insulating layer of flame-retardant polyvinyl chloride or low-smoke halogen-free polyolefin material; the cable fire-resistant layer is a cable glass fiber layer; the flame-retardant sheath layer is flame-retardant polyvinyl chloride or low-smoke Sheath layer of smoke-free halogen-free polyolefin material.

The utility model has the technical effects of less copper consumption, light weight and low cost. Due to the use of multi-fiber, small-diameter monofilament structure and multi-strand stranding process, the cable is particularly flexible and can be bent arbitrarily.

The utility model is described in detail below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the schematic diagram showing the copper-clad aluminum five-core circular flame-retardant fire-resistant flexible cable structure of the present utility model;

Fig. 2 is the schematic diagram showing the structure of copper-clad aluminum five-core tile-shaped flame-retardant and fire-resistant flexible cable of the present utility model;

Fig. 3 is a schematic diagram showing the structure of the conductive monofilament 11 of the present invention.

Detailed ways

The copper-clad aluminum five-core flame-retardant and fire-resistant flexible cable of the utility model includes the copper-clad aluminum five-core circular flame-retardant and fire-resistant flexible cable shown in Figure 1 and the copper-clad aluminum five-core tile-shaped flame-retardant and fire-resistant flexible cable shown in Figure 2 .

As shown in Figure 1 and Figure 3, the copper-clad aluminum five-core round flame-retardant fire-resistant flexible cable of the present utility model includes: a conductive core 1 with an insulating layer 4, the cross-section of the conductive core 1 is circular; A wire refractory layer 5, wrapping five cables formed by twisting five conductive cores 1 with an insulating layer 4; and a flame-retardant sheath layer 6 extruded on the cable refractory layer 5; Wherein: the conductive wire core 1 is formed by twisting a plurality of conductive monofilaments 11; each conductive monofilament 11 is composed of an aluminum conductor 111 and a copper cladding 112 wrapped outside the aluminum conductor 111.

Wherein, each conductive monofilament 11 includes a plurality of conductive monofilaments 11 bundled together to form strands.

The copper-clad aluminum five-core circular flame-retardant and fire-resistant flexible cable of the utility model also includes a filling rope 7 filled between the cable fire-resistant layer 5 and the insulating layer 4 .

As shown in Figure 2 and Figure 3, the copper-clad aluminum five-core tile-shaped flame-retardant and fire-resistant flexible cable of the utility model includes: a conductive core 1 with an insulating layer 4, and the cross-section of the conductive core 1 is tile-shaped; Wire refractory layer 5, wrapping and twisting five conductive wire cores 1 with insulating layer 4 to form a cable, and the cross section of the cable is circular; and extruded on the cable refractory layer 5 The flame-retardant sheath layer 6; wherein: the conductive core 1 is formed by twisting a plurality of conductive monofilaments 11;

Wherein, each conductive monofilament 11 includes a plurality of conductive monofilaments 11 bundled together to form strands.

Both of the above two copper-clad aluminum five-core flame-retardant and fire-resistant flexible cables of the utility model may include a core fire-resistant layer arranged between the conductive core 1 and the insulating layer 4 . The wire core refractory layer includes a mica layer 2 wrapped around the outer surface of the single conductive wire core 1 ; and a glass fiber layer (tape) 3 wrapped around the outer surface of the mica layer 2 .

In addition, the diameter of the conductive monofilament 11 of the present invention is 0.2-1.2mm, wherein: the diameter of the aluminum conductor 111 is 0.18439-1.10635mm, and the thickness of the copper cladding 112 is 0.007805-0.04685mm, that is to say, the copper cladding The section of 112 accounts for 15±2% of the whole conductive monofilament 11 , and the rest is the section of the aluminum conductor 111 .

As mentioned above, in the above two cables, the insulating layer 4 can be an insulating layer of flame-retardant polyvinyl chloride or low-smoke halogen-free polyolefin material; the cable fire-resistant layer 5 can be a cable glass fiber layer; the flame-retardant sheath layer 6 It can be flame-retardant polyvinyl chloride or low-smoke halogen-free polyolefin material sheath layer.

The preferred but not limited to 18 specifications of the conductive wire core 1 of the present invention are shown in the table below.

For the copper-clad aluminum five-core circular flame-retardant and fire-resistant flexible cable of the utility model shown in Figure 1, the method for manufacturing the cable includes: making the copper-clad aluminum wire into a single conductive wire core 1; The step of forming the core refractory layer (2, 3) on the outer surface of the conductive wire core 1; extruding insulating material on the wire core refractory layer (2, 3) to form the insulation of the insulated wire core with the insulating layer 4 Processing steps: performing cable processing on five insulated wire cores with the insulating layer 4 to form a cable; and extruding refractory plastic on the cable to form a flame-retardant sheath layer 6 . Since the cross-section of the single conductive core 1 is usually circular when manufacturing a single conductive core 1, it is usually not necessary to process the conductive core 1 into a circular conductive core 1. ; But if the cross-section of the single conductive wire core 1 is not circular, the conductive wire core 1 needs to be processed into a circular conductive wire core with a cross-section.

The above-mentioned steps of forming the core refractory layer (2, 3) on the outer surface of the single conductive wire core 1 include: wrapping the mica layer (tape) 2 on the outer surface of the single conductive wire core 1; The outer surface of the layer 2 is wrapped with a glass fiber layer (tape) 3 .

The steps of cable-forming process include: using a cable-forming machine to twist five insulated wire cores to form a wire bundle; then forming a cable refractory layer (such as wrapping glass fiber tape) 5 on the wire bundle to form a cable.

Since the conductive core 1 shown in FIG. 1 is a circular core, when the five insulated cores are cabled, there will be a considerable space in the cable, which will reduce the strength of the cable. For this reason, the cabling processing step of the present invention also includes filling fillers 7 between the cable refractory layer 5 and the five insulating layers 4 . A specific method of filling may be, for example: before wrapping the wire bundle with the cable fire-resistant layer 5 , first wrap the wire bundle with a filling rope, and then wrap the wire bundle with the cable fire-resistant layer 5 . Of course, other ways can also be used for filling.

For the copper-clad aluminum five-core tile-shaped flame-retardant and fire-resistant flexible cable of the utility model shown in Figure 2, the method for manufacturing this flexible cable includes: making the copper-clad aluminum wire into a single conductive core with a circular cross section Step 1; the step of processing a single conductive wire core with a circular cross section into a tile-shaped conductive wire core 1; The step of forming the core refractory layer (2, 3) on the outer surface of the conductive core 1 respectively; extruding insulating material on the core refractory layer (2, 3) to form an insulated core with an insulating layer 4 Insulation treatment step; five insulated wire cores with the insulation layer 4 are cabled to form a cable step; and extruding flame-retardant plastic on the cable to form a flame-retardant sheath layer 6 step.

The above step of forming a refractory layer (2, 3) on the outer surface of a single conductive core 1 includes: wrapping a mica layer (tape) 2 on the outer surface of the single conductive core 1; The outer surface of the glass fiber layer (band) 3 is wrapped around.

The cable-forming process includes: using a cable-forming machine to twist four insulated wire cores with a tile-shaped cross section and one insulated wire core with a circular cross-section to form a wire bundle, wherein the wire bundle has a cross-section It is circular, and the four insulated wire cores with a tile-shaped cross-section surround the one insulated wire core with a circular cross-section; then wrap the cable refractory layer (such as wrapping glass Fiber ribbon) 5, forming a cable.

Since the cabled cable contains four tile-shaped conductive cores and one conductive core with a circular cross-section, the cable is basically filled, that is, the cross-section of the cable It is (solid) circular, which not only increases the compressive and bending strength of the cable, but also increases the surface area of the conductive core (thus reducing the transmission loss of communication signals), which creates a great opportunity for greatly reducing the outer diameter of the cable. Favorable conditions. That is to say, under the condition that the surface area of the conductive core remains constant, the outer diameter of the cable with the tile-shaped conductive core is greatly reduced compared with the cable with the circular conductive core.

In addition, in the above two manufacturing methods, the insulating layer 4 can be an insulating layer formed by extruding flame-retardant polyvinyl chloride or low-smoke halogen-free polyolefin material on the glass fiber layer 3; the cable fire-resistant layer 5 can be a wire harness The fire-resistant layer formed by wrapping the cable glass fiber layer 5; the flame-retardant sheath layer 6 can be a sheath layer formed by extruding flame-retardant polyvinyl chloride or low-smoke halogen-free polyolefin material on the cable fire-resistant layer 5.

The step of making the copper-clad aluminum wire into a single conductive wire core 1 of the utility model includes: drawing the copper-clad aluminum wire into a single conductive monofilament 11 by using a wire drawing machine; 11. Perform annealing treatment; use a stranding machine to combine several annealed conductive monofilament bundles into strands; use a twisting machine to twist several strands into a conductive core 1 .

The utility model can also omit the above-mentioned step of synthesizing the conductive monofilament bundle into strands, and improve the step of making a single conductive wire core 1 as follows: using a wire drawing machine to draw the copper-clad aluminum wire into a single conductive monofilament 11; An annealing machine is used to anneal the single conductive monofilament 11;

It is one of the characteristics of the utility model that several strands of conductive monofilaments 11 are twisted together to form the conductive core 1, which will make the cable particularly soft and can be bent arbitrarily.

In the process of drawing the copper-clad aluminum wire into a single conductive monofilament 11, the drawing angle should be selected as 12°-14° to ensure the successful drawing of the conductive monofilament.

Since the crystal shifts and hardens after the monofilament is drawn, annealing recovery must be carried out. The key to the annealing treatment is the control of the annealing temperature. The annealing temperature of pure copper is about 650°C. The annealing temperature of the utility model should be controlled at 540± 10°C.

In the process of bundle synthetic strands, multiple annealed conductive monofilaments can be bundled according to a certain pitch, and the pitch is not greater than 14 times the outer diameter of the bundled strands; the monofilaments can be welded but the welded part The strength is not less than 85% of the original value.

During the process of twisting the several strands into the conductive core 1, the strands can be twisted at a certain pitch.

Because the conductive wire core of the utility model adopts the structure of small diameter, multiple wires, and multi-strand wires twisted, the conductive wire core itself is very soft, and the strength of the copper-clad aluminum wire is not large. come with great difficulty.

For this reason, the utility model adopts to twist the strands in a circular arrangement earlier to form a circular conductive wire core 1 with a circular cross section, and then use a tile forming mold to suppress. In order to reduce the resistance of the mold to the conductor, the utility model adopts the "non-resistance continuous forming" method for pressing, that is, relying on the linear motion of the conductive wire core to drive the mold to make a circular motion, and to shape the conductive wire core by applying a certain pressure, and to ensure The surface of the conductive wire core is smooth and flat without damage.

In addition, when extruding the insulation layer, in order to ensure the uniformity of the insulation thickness, the utility model utilizes the "mold vacuum method (that is, plastic extrusion processing in a vacuum mold)" to make the conductive wire core with a tile-shaped cross section Plastic extrusion treatment is carried out to effectively ensure the uniformity of the insulating layer.

The flame retardant principle of the utility model is: there is a flame retardant in the insulation and sheath materials used, and the function of this flame retardant is mainly to isolate the cable from the outside air and extend the cable when a fire occurs. The burning time can effectively prevent the extension of the flame. When the cable leaves the open flame, the flame will extinguish itself within 5 seconds.

The fire-resistant principle of the utility model is: a fire-resistant layer is set in the cable, and the material of the fire-resistant layer is mainly composed of a mica layer and a glass fiber layer. The characteristics of this material have excellent insulation performance, fire resistance, and heat resistance. It can keep running for 90 minutes.

The cable of the utility model has the advantages of less copper consumption, light weight and low cost. Due to the use of multi-fiber, small-diameter monofilament structure and multi-strand stranding process, the cable is particularly flexible and can be bent arbitrarily.

Although the utility model has been described in detail above, the utility model is not limited thereto, and those skilled in the art can make various modifications according to the principles of the utility model. Therefore, all modifications made according to the principle of the utility model should be understood as falling into the protection scope of the utility model.

Claims (10)

1, a kind of copper coated aluminum five-core flame-retardant refractory flexible electric cable is characterized in that comprising:

Conductor wire core (1) with insulating barrier (4), the cross section of this conductor wire core (1) are circular;

Cable flame retardant coating (5) is wrapped up in the stranded five described cables that have the conductor wire core (1) of insulating barrier (4) and form of bag; And

Be extruded in the flame retardant sheath layer (6) on the described cable flame retardant coating (5); Wherein:

Conductor wire core (1) is by the stranded formation of multiply conductive monofilament (11);

Described conductive monofilament (11) is by aluminium conductor (111) and be coated on outer copper clad (112) formation of aluminium conductor (111).

2, copper coated aluminum five-core flame-retardant refractory flexible electric cable according to claim 1 is characterized in that the per share conductive monofilament (11) in the described multiply conductive monofilament (11) comprises the many conductive monofilaments (11) that lumped together the formation strand by bundle respectively.

3, copper coated aluminum five-core flame-retardant refractory flexible electric cable according to claim 1 and 2 is characterized in that also comprising the gasket for packing (7) between five insulating barriers (4) that are filled in cable flame retardant coating (5) and described five conductor wire cores (1).

4, copper coated aluminum five-core flame-retardant refractory flexible electric cable according to claim 3, it is characterized in that being provided with the core flame retardant coating between described conductor wire core (1) and insulating barrier (4), described core flame retardant coating comprises: the mica layer (2) that is wrapped in described single conductor wire core (1) outer surface; And the glass layer (3) of wrapped outer surface at described mica layer (2).

5, copper coated aluminum five-core flame-retardant refractory flexible electric cable according to claim 4, the diameter that it is characterized in that described conductive monofilament (11) is 0.2～1.2mm, the diameter of aluminium conductor (111) is 0.18439～1.10635mm, and the thickness of copper clad (112) is 0.007805～0.04685mm.

6, a kind of copper coated aluminum five-core flame-retardant refractory flexible electric cable is characterized in that comprising:

Stranded five conductor wire cores (1) with insulating barrier (4) and the cables that form, the cross section of described cable be circular, wherein four cross sections be watt shape wire core (1) is surrounded the conductor wire core (1) that a cross section is a circle;

Wrap up in the cable flame retardant coating (5) of the described cable of bag; And

Be extruded in the flame retardant sheath layer (6) on the described cable flame retardant coating (5); Wherein:

Conductor wire core (1) is by the stranded formation of multiply conductive monofilament (11);

Described conductive monofilament (11) is by aluminium conductor (111) and be coated on outer copper clad (112) formation of aluminium conductor (111).

7, copper coated aluminum five-core flame-retardant refractory flexible electric cable according to claim 6 is characterized in that the per share conductive monofilament (11) in the described multiply conductive monofilament (11) comprises the many conductive monofilaments (11) that lumped together the formation strand by bundle respectively.

8, according to claim 6 or 7 described copper coated aluminum five-core flame-retardant refractory flexible electric cables, it is characterized in that being provided with the core flame retardant coating between described conductor wire core (1) and insulating barrier (4), described core flame retardant coating comprises: the mica layer (2) that is wrapped in described single conductor wire core (1) outer surface; And the glass layer (3) of wrapped outer surface at described mica layer (2).

9, copper coated aluminum five-core flame-retardant refractory flexible electric cable according to claim 8, the diameter that it is characterized in that described conductive monofilament (11) is 0.2～1.2mm, the diameter of described aluminium conductor (111) is 0.18439～1.10635mm, and the thickness of described copper clad (112) is 0.007805～0.04685mm.

10, copper coated aluminum five-core flame-retardant refractory flexible electric cable according to claim 9 is characterized in that described insulating barrier (4) is flame-proof polyvinyl chloride or low-smoke halogen-free polyolefin insulated with material layer; Described cable flame retardant coating (5) is the cable glass layer; Described flame retardant sheath layer (6) is flame-proof polyvinyl chloride or low-smoke halogen-free polyolefin material guards layer.

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