Low-voltage fireproof polyvinyl chloride wire

Abstract

The utility model provides a low-voltage fireproof polyvinyl chloride wire, and relates to the technical field of wires. A low-voltage fireproof polyvinyl chloride wire comprises wire cores, first insulating layers, first fireproof layers and a filling layer, a plurality of wire cores are arranged in a single wire, each wire core is sleeved with the first insulating layer, the first insulating layers are sleeved with the first fireproof layers, the first fireproof layers are jointly sleeved with a second insulating layer, and the second insulating layer is sleeved with the filling layer. And a filling layer is filled between the second insulating layer and the first fireproof layer. And the buffer layer is matched with the through holes to buffer extrusion and folding pressure, so that the wire body is protected, and the folding protection effect is achieved.

Description

Technical Field

[0001] The utility model provides a low-voltage fireproof PVC wire, which relates to the technical field of wires. Background Art

[0002] The wire and cable industry is an important supporting industry for China's economic construction, widely used in various fields of the national economy, accounting for 1 / 4 of the Chinese electrical industry, and is the second largest industry in the machinery industry after the automotive industry. Among them, the wires used in interior decoration are mainly PVC insulated cables with a rated voltage of 450 / 750V and below, also known as cloth wires.

[0003] Existing wires generally only have a rubber insulating sleeve on the outside, which protects the core to a certain extent, but has a simple structure and poor characteristics. When the wire is folded under overall stress, the external rubber sleeve cannot protect the core well.

[0004] Therefore, it is necessary to provide a low-voltage fireproof PVC wire with a folding protection function. Content of the Utility Model

[0005] In order to overcome the defect that existing wires generally only have a rubber insulating sleeve on the outside and cannot protect the core well when the wire is folded under overall stress, the utility model provides a low-voltage fireproof PVC wire with a folding protection function.

[0006] In order to achieve the above object, the embodiment of the utility model provides the following technical solution: a low-voltage fireproof PVC wire, which includes a wire core, a first insulating layer, a first fireproof layer and a filling layer. Multiple wire cores are arranged in a single wire. A first insulating layer is sleeved outside each wire core. A first fireproof layer is sleeved outside the first insulating layer. A second insulating layer is sleeved outside multiple first fireproof layers together. A filling layer is filled between the second insulating layer and the first fireproof layer. It further includes a buffer layer. The buffer layer is sleeved inside the second insulating layer. The filling layer wraps inside the buffer layer. A plurality of through holes are formed in the buffer layer.

[0007] As a further preferred solution, the filling layer is composed of PVC, jute and rubber strips together.

[0008] As a further preferred solution, a second fireproof layer is sleeved outside the second insulating layer. The second fireproof layer is made of glass fiber.

[0009] As a further preferred solution, an abrasion-proof outer sleeve is sleeved outside the second fireproof layer.

[0010] As a further preferred solution, the abrasion-proof outer sleeve is a composite material composed of wear-resistant ceramics and epoxy resin.

[0011] As a further preferred solution, a plurality of anti-slip sleeves are sleeved outside the anti-abrasion outer sleeve.

[0012] As a further preferred solution, a number of reinforcing wires are clamped inside the second fireproof layer.

[0013] Compared with the prior art, the electric wire provided by the embodiment of the present utility model has the following advantages: 1. The buffer layer cooperates with the through holes to buffer the pressure of extrusion and folding, so as to protect the wire body and achieve the effect of folding protection.

[0014] 2. The second fireproof layer protects the second insulating layer and the wire part inside it, isolates it from external fire sources, reduces the damage of the electric wire, and can save more materials for subsequent maintenance, achieving the effect of external fire prevention.

[0015] 3. The anti-abrasion outer sleeve protects the second fireproof layer and the materials inside it from abrasion, achieving the effect of reducing the abrasion of the electric wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0017] Figure 2 It is a planar structural schematic diagram of the wire core, filling layer and buffer layer of the present utility model.

[0018] Figure 3 It is a three-dimensional sectional structural schematic diagram of the wire core, first insulating layer and second insulating layer of the present utility model.

[0019] Figure 4 It is a three-dimensional sectional structural schematic diagram of the reinforcing wire, anti-abrasion outer sleeve and anti-slip sleeve of the present utility model. Wherein: 1 - wire core, 2 - first insulating layer, 3 - first fireproof layer, 4 - filling layer, 5 - buffer layer, 501 - through hole, 6 - second insulating layer, 7 - second fireproof layer, 701 - reinforcing wire, 8 - anti-abrasion outer sleeve, 9 - anti-slip sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further illustrates the technical solutions in combination with specific embodiments. It should be noted that: The words indicating orientations such as up, down, left, and right mentioned in this article are only for the positions of the shown structures in the corresponding drawings. The serial numbers assigned to the components in this article, for example: first, second, etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And as used in this application: connection, coupling, unless otherwise specified, both include direct and indirect connection (coupling).

[0021] Embodiment 1: A low-voltage fireproof polyvinyl chloride electric wire, refer to Figures 1-4As shown in the figure, it includes a wire core 1, a first insulating layer 2, a first fireproof layer 3 and a filling layer 4. There are four wire cores 1 in a single wire. A first insulating layer 2 for preventing the wire core 1 from leaking electricity is sleeved outside each wire core 1. A first fireproof layer 3 for preventing the wire core 1 from spontaneous combustion and causing a fire is sleeved outside the first insulating layer 2. A second insulating layer 6 is sleeved outside multiple first fireproof layers 3. A filling layer 4 is filled between the second insulating layer 6 and the first fireproof layer 3. The filling layer 4 is composed of polyvinyl chloride, jute and rubber strips, with a light weight and insulating properties. It also includes a buffer layer 5. A buffer layer 5 for buffering extrusion and bending is sleeved inside the second insulating layer 6. The filling layer 4 wraps inside the buffer layer 5. A number of through holes 501 are provided on the buffer layer 5.

[0022] When using this wire, the current is conducted through the wire core 1. The first insulating layer 2 can limit the current on the wire core 1 to avoid electric leakage. When the wire core 1 gets hot, the first fireproof layer 3 can prevent the wire from spontaneous combustion and causing a fire. The filling layer 4 separates the wire cores 1 inside the wire. And because the first fireproof layer 3 is cylindrical, the filling layer 4 can fill the gaps between the first fireproof layers 3 to prevent the first fireproof layer 3 from shaking inside the second insulating layer 6. When being extruded and folded by external force, the buffer layer 5 cooperates with the through holes 501 to buffer the pressure of extrusion and folding to protect the wire body.

[0023] Embodiment 2: On the basis of Embodiment 1, as shown in the figure, a second fireproof layer 7 for isolating external flames is sleeved outside the second insulating layer 6. The second fireproof layer 7 is made of glass fiber. A wear-resistant outer sleeve 8 is sleeved outside the second fireproof layer 7. The wear-resistant outer sleeve 8 is a composite material composed of wear-resistant ceramics and epoxy resin.

[0024] When combustion occurs outside, the second fireproof layer 7 can protect the second insulating layer 6 and the wire part inside it, isolate it from the external fire source, reduce the damage of the wire, and save more materials for subsequent maintenance. The wear-resistant outer sleeve 8 can protect the second fireproof layer 7 and the materials inside it from abrasion and reduce the wear of the wire.

[0025] Multiple anti-slip sleeves 9 are sleeved outside the wear-resistant outer sleeve 8. A number of high-toughness reinforcing wires 701 are clamped inside the second fireproof layer 7.

[0026] The anti-slip sleeves 9 can prevent the staff from slipping when pulling and laying the wire. The reinforcing wires 701 make the second fireproof layer 7 more resistant to folding, make the structure of the second fireproof layer 7 more firm and not easy to be damaged.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-voltage fireproof polyvinyl chloride electric wire, comprising a wire core (1), a first insulating layer (2), a first fireproof layer (3) and a filling layer (4), wherein a plurality of wire cores (1) are arranged in a single wire, each wire core (1) is sheathed with a first insulating layer (2), the first insulating layer (2) is sheathed with a first fireproof layer (3), a plurality of first fireproof layers (3) are sheathed with a second insulating layer (6) on the outside, and a filling layer (4) is filled between the second insulating layer (6) and the first fireproof layer (3), characterized in that: It also comprises a buffer layer (5), the buffer layer (5) is sleeved inside the second insulating layer (6), the filling layer (4) wraps around the inside of the buffer layer (5), and a plurality of through holes (501) are opened on the buffer layer (5).

2. A low-voltage fireproof polyvinyl chloride electric wire as claimed in claim 1, characterized in that: The filling layer (4) is composed of polyvinyl chloride, jute and rubber strips.

3. A low-voltage fireproof polyvinyl chloride electric wire as claimed in claim 1, characterized in that: The second insulating layer (6) is covered with a second fireproof layer (7), and the second fireproof layer (7) is made of glass fiber.

4. A low-voltage fireproof polyvinyl chloride electric wire as claimed in claim 3, characterized in that: The second fireproof layer (7) is externally covered with an anti-wear outer jacket (8).

5. A low-voltage fireproof polyvinyl chloride electric wire as claimed in claim 4, characterized in that: The wear-resistant outer jacket (8) is a composite material composed of wear-resistant ceramics and epoxy resin.

6. A low-voltage fireproof polyvinyl chloride electric wire as claimed in claim 4, characterized in that: The outer cover of the anti-wear outer jacket (8) is provided with a plurality of anti-slip covers (9).

7. A low-voltage fireproof polyvinyl chloride electric wire as claimed in claim 3, characterized in that: A plurality of reinforcing wires (701) are sandwiched in the second fireproof layer (7).

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