CN205645361U - Fireproof cable - Google Patents

Abstract

A fireproof electric wire, which is composed of two wires and a grounding wire. The outer walls of the two wires are respectively wrapped with a layer of non-metallic fireproof layer, and an oval-shaped The first metal flame-retardant layer; the two wires are in tangential contact through their respective non-metal fire-resistant layers, and one end of the non-metal fire-resistant layer of the two wires is in contact with one end of the first metal flame-retardant layer , and the center points of the two wires and the center point of the first metal flame-retardant layer are on the same straight line; the two wires and one ground wire are wrapped with an outer sheath; It will not cause fire danger when burning, and reduce the smoke and toxic gas caused by burning as much as possible, and when there is a fire danger around it, it can be flame-retardant and can keep the line energized. It has the advantages of simple and reasonable structure, convenient manufacture and low cost. specialty.

Description

fireproof wire

technical field

The utility model belongs to the technical field of electric wires, and in particular relates to a fireproof electric wire which can prevent fire hazards caused by line aging, short circuit or overload, and can even prevent leakage and fire prevention during fires, and can continue to unblock the circuit during fire dangers.

Background technique

Application No. 02228993.3 is the Chinese patent "Cable with Protective Wire", which consists of two conductive wire cores with an outer insulation layer and an outer sheath that binds them together, and the two conductive wire cores with an outer insulation layer There is a grounding protective wire between the outer sheath and the outer sheath. It solves the problem of electrical equipment or household appliances being electrified due to faults, causing personal electric shock, or equipment and line damage, and can also avoid unsafe problems caused by wiring errors in electrical construction. But it also has some disadvantages: its fire performance is poor, so it will also burn when the line is aging or the surrounding environment is on fire, so that the power supply is interrupted, and it also brings hidden dangers of electric shock to people in the evacuation.

For the fire prevention of the wire itself, there are also fireproof wires at present. The inner layer of the fireproof wire also has a glass fiber interwoven tube with insulation, fire prevention and heat insulation functions, so that it can prevent the aging, short circuit or overload of the line to a certain extent. And the fire risk that causes: but for the fire risk that occurs around it, then catches fire at any time and interrupts power supply because of its own poor fireproof performance, thereby avoiding the danger of electric shock again in the people in danger.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a fire hazard not only when the circuit is aging, short-circuited or overloaded, but also minimizes the smoke and toxic gas caused by burning, and the occurrence of fire around it. In case of fire, the fireproof wire can be self-flammable and can keep the line energized, and at the same time, it has the characteristics of simple and reasonable structure, convenient manufacture and low cost.

The purpose of this utility model is accomplished through the following technical scheme, which consists of two wires and a grounding wire. The outer walls of the two wires are respectively wrapped with a non-metallic fireproof layer. There is an oval-shaped first metal flame-retardant layer over the metal fire-proof layer; the two wires are in tangential contact through their respective non-metal fire-proof layers, and one end of the non-metal fire-proof layer of the two wires is in contact with the first One end of the metal flame-retardant layer is in contact, and the center points of the two wires and the center point of the first metal flame-retardant layer are on the same straight line; the two wires and a grounding wire are wrapped with outer sheaths.

Preferably, the outer sheath is an annular sleeve of flame-retardant plastic, and its inner wall is covered with a second metal flame-retardant layer.

Preferably, the two wires are bare copper wires, and one ground wire is tinned wire.

The beneficial effects of the utility model are: 1) The utility model uses the outer sheath of the low-smoke, halogen-free flame-retardant polyolefin, the metal flame-retardant layer and the non-metal fire-proof layer inside, and the conductive wire with the non-metal fire-proof layer outside. Afterwards, the utility model fireproof wire has a four-layer fireproof structure, thus effectively preventing leakage or fire hazards caused by line aging, short circuit or overload. High-rise hotels and other occasions with particularly high safety and fire prevention requirements can also be used in household appliances, furniture, building materials, etc., or for reliable wiring of fire-proof lines, and the product has a good prospect; 2) The low-smoke fireproof wire used in the utility model In addition to its flame retardancy, halogen-free flame-retardant polyolefin also has the characteristics of low smoke, halogen-free, low corrosion, and low toxicity compared with halogen-containing fuels, which greatly reduces the harm to humans during combustion; 3) Through the metal anti-oxidation layer with heat resistance and large transmission capacity at high temperature arranged on the outer wall of the grounding wire, the fireproof wire of the utility model can be energized normally in the fire situation: after testing, it can withstand the fire situation. 4) The low-smoke, halogen-free flame-retardant polyolefin used in the outer sheath of the utility model fireproof wire and the metal flame-retardant layer inside the outer sheath can be purchased conveniently from the market, so The material is convenient and economical, and is beneficial to the renewal and improvement of the existing fireproof wires.

Description of drawings

Fig. 1 is a structural representation of the utility model.

The labels in the attached drawings are: 1. wire; 2. grounding wire; 3. outer sheath; 4. non-metal fireproof layer; 5. first metal flame-retardant layer; 6. second metal flame-retardant layer.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings: As shown in the accompanying drawing 1, the utility model is composed of two wires 1 and a grounding wire 2, and the outer walls of the two wires 1 are respectively wrapped with a layer Non-metallic fireproof layer 4, an oval-shaped first metal flameproof layer 5 is sheathed on the nonmetallic fireproof layer 4 of the two wires 1, so that the two wires 1 are integrated to facilitate the distinction from the ground wire 2 The two wires 1 are in tangential contact through their respective non-metallic fire-proof layers 4, and one end of the non-metal fire-proof layer 4 of the two wires 1 is in contact with one end of the first metal flame-retardant layer 5, And the center points of the two wires 1 and the center point of the first metal flame-retardant layer 5 are on the same straight line; the outer sheath 3 is wrapped around the two wires 1 and one ground wire 2 .

The outer sheath 3 is an annular sleeve of flame-retardant plastic, and its inner wall is covered with a second metal flame-retardant layer 6 .

The two wires 1 are bare copper wires, and one ground wire 2 is tinned wire.

The material of the outer sheath 3 in the fireproof wire of this embodiment is a low-smoke, halogen-free flame-retardant polyolefin, such as flame-retardant polyethylene (PE), flame-retardant polycarbonate (PC), etc., which can be purchased directly from the market . The second metal flame-retardant layer 6 of the inner wall of the outer sheath 3 and the first metal flame-retardant layer 5 outside the two wires 1 are aluminum foil or copper foil; in this embodiment, an industrial thermal insulation and fireproof aluminum foil composite material is used, which can be used in The low-smoke, halogen-free, flame-retardant outer sheath 3 is bonded synchronously during molding, and no additional adhesive is required; this not only avoids pollution caused by the adhesive, but also greatly improves the adhesive strength. The second metal flame-retardant layer 6 on the inner surface of the outer sheath 3 not only improves the flame-retardant and fire-resistant performance of the outer sheath 3, but also can further insulate heat and moisture, thereby delaying the aging speed of the outer sheath and improving the performance of the outer sheath. its service life.

The non-metallic fire-proof layer 4 that has on the outer wall of above-mentioned wire 1 is to adopt non-metallic silica gel layer; The wire 1 with non-metal fire-proof layer 4 in the present embodiment is the silica gel fireproof electric wire that buys from the market, and it directly becomes this The semi-finished fireproof electric wire of the embodiment is convenient to manufacture, and besides fireproof, it can also increase the insulation performance, moisture resistance performance and high temperature resistance performance of the wire 1.

The utility model is not limited to the above-mentioned embodiments, regardless of any changes in its shape or material composition, any structural design provided by the utility model is a deformation of the utility model, and should be considered as a modification of the utility model. within the scope of protection.

Claims (3)

1. A fireproof electric wire, consisting of two wires (1) and a grounding wire (2), characterized in that: the outer walls of the two wires (1) are respectively wrapped with a non-metallic fireproof layer (4 ), there is an oval-shaped first metal flame-retardant layer (5) over the non-metal fire-proof layer (4) of the two wires (1); the two wires (1) pass through their respective non-metal fire-proof layers (4) In tangential contact, one end of the non-metallic fire-resistant layer (4) of the two wires (1) is in contact with one end of the first metal flame-retardant layer (5), and the two wires (1) The center point of the first metal flame-retardant layer (5) is on the same straight line; the outer sheath (3) is wrapped around the two wires (1) and one ground wire (2). 2. The fireproof electric wire according to claim 1, characterized in that: the outer sheath (3) is an annular sleeve of flame-retardant plastic, and its inner wall is covered with a second metal flame-retardant layer (6). 3. The fireproof wire according to claim 1, characterized in that: the two wires (1) are bare copper wires, and one ground wire (2) is tinned wire.