Fireproof flame-retardant cable

Abstract

The utility model discloses a fireproof flame-retardant cable, which comprises a conductive core (1), and an insulating layer (2), a shielding layer (3) and a protective layer (4) are sequentially coated outside the conductive core (1). A first foaming heat insulation layer (5) is arranged between the shielding layer (3) and the protective layer (4), and a flame-retardant layer (6) is arranged outside the first foaming heat insulation layer (5); a plurality of accommodating grooves (7) which are distributed at intervals in an array shape are formed in the outer surface of the flame-retardant layer (6), and a flame retardant is arranged in each accommodating groove (7); the flame-retardant layer (6) is wrapped by an aluminum foil layer (9), the aluminum foil layer (9) shields and seals the top openings of all the containing grooves (7) in the outer surface of the flame-retardant layer (6), and a second foaming heat insulation layer (10) is arranged between the aluminum foil layer (9) and the protection layer (4). According to the utility model, the fireproof and flame-retardant performance can be improved, and the cable also has the advantages of good shielding performance, good impact resistance and convenient bending and laying.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a fireproof and flame-retardant cable. Background Art

[0002] Cables are a common device for transmitting electrical energy or signals. They are generally composed of a conductive core and an insulating protective layer, where the conductive core can be a single cable or multiple cables insulated from each other. To ensure that the signal transmitted on the conductive core is not interfered with, some cables will be covered with a shielding layer over the insulating layer. At the same time, to protect the shielding layer from damage by the external environment, a protective layer will be covered over the shielding layer. Therefore, common cables that can stably transmit signals include a conductive core, an insulating layer, a shielding layer, and a protective layer from the inside to the outside. However, in actual application, due to the complex environment in which the cables are located, in order to ensure the safety of the entire cable system, existing cables have deficiencies in fire retardancy and shielding performance.

[0003] Therefore, existing cables have the problems of poor fire retardancy and poor shielding performance. Utility Model Content

[0004] The purpose of the utility model is to provide a fireproof and flame-retardant cable. The utility model can not only improve the fireproof and flame-retardant performance, but also has the advantage of good shielding performance.

[0005] The technical solution of the utility model is as follows: a fire-proof and flame-retardant cable, comprising a conductive core, wherein the conductive core is sequentially coated with an insulating layer, a shielding layer, and a protective layer; a first foamed thermal insulation layer is provided between the shielding layer and the protective layer, and a flame-retardant layer is provided outside the first foamed thermal insulation layer; a plurality of accommodating grooves spaced apart in an array are provided on the outer surface of the flame-retardant layer, and a flame retardant is provided in each accommodating groove; an aluminum foil layer is provided on the outer surface of the flame-retardant layer, and the aluminum foil layer blocks and closes the top openings of all the accommodating grooves on the outer surface of the flame-retardant layer, and a second foamed thermal insulation layer is provided between the aluminum foil layer and the protective layer.

[0006] In the aforementioned fire-resistant and flame-retardant cable, the receiving groove is cylindrical, the depth of the receiving groove is half the thickness of the flame-retardant layer, the diameter of the receiving groove is 10-20 mm, and the spacing between adjacent receiving grooves is 10-20 mm.

[0007] In the aforementioned fire-resistant and flame-retardant cable, the insulating layer is made of chlorinated polyethylene; the shielding layer is made of red copper shielding mesh; and the protective layer is made of silicone rubber.

[0008] In the aforementioned fire-resistant and flame-retardant cable, the first foam insulation layer and the second foam insulation layer are both made of foamed polyethylene.

[0009] In the aforementioned fire-resistant and flame-retardant cable, the flame-retardant layer is made of PVC.

[0010] Compared with the prior art, the present invention sequentially arranges a first foam insulation layer, a flame retardant layer, an aluminum foil layer and a second foam insulation layer between the shielding layer and the protective layer from the inside to the outside. At the same time, multiple receiving grooves on the flame retardant layer are filled with flame retardants, which can greatly improve the fire retardant performance while preventing heat from being transferred inward to melt and damage the internal structure; by arranging the aluminum foil layer, the aluminum foil layer can also play a certain electromagnetic shielding effect, thereby improving the shielding performance; due to the low-density foaming properties of the first foam insulation layer and the second foam insulation layer themselves, the cable has better buffering properties when it is impacted, and the cable can be bent more easily, which facilitates the laying operation.

[0011] In addition, the receiving groove in the present invention is cylindrical, and the depth of the receiving groove is half the thickness of the flame retardant layer. The diameter of the receiving groove is 10 to 20 mm, and the spacing between adjacent receiving grooves is 10 to 20 mm, which reduces the hardness of the flame retardant layer itself, allowing the cable to be bent more easily and facilitating laying operations.

[0012] The insulating layer is made of chlorinated polyethylene, which has good insulation effect; the shielding layer is made of red copper shielding mesh, which has good electromagnetic shielding effect; the protective layer is made of silicone rubber, which has good protection, weather resistance and flame retardancy.

[0013] The first and second foam insulation layers are both made of foamed polyethylene, which not only effectively insulates but also has the advantages of good insulation and flame retardancy. The flame retardant layer is made of PVC, which has good flame retardancy.

[0014] Therefore, the utility model can not only improve the fire retardant performance, but also has the advantages of good shielding performance, good impact resistance and convenient bending and laying. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] The markings in the accompanying drawings are: 1-conductive core, 2-insulating layer, 3-shielding layer, 4-protective layer, 5-first foam insulation layer, 6-flame retardant layer, 7-receiving groove, 9-aluminum foil layer, 10-second foam insulation layer. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0018] Embodiment. A fire-resistant flame-retardant cable, comprising: Figure 1As shown, it includes a conductive core 1, and the conductive core 1 is sequentially coated with an insulating layer 2, a shielding layer 3, and a protective layer 4; a first foam insulation layer 5 is provided between the shielding layer 3 and the protective layer 4, and a flame retardant layer 6 is provided outside the first foam insulation layer 5; a plurality of receiving grooves 7 are provided on the outer surface of the flame retardant layer 6 and spaced apart in an array, and each receiving groove 7 is provided with a flame retardant; an aluminum foil layer 9 is provided on the outer surface of the flame retardant layer 6, and the aluminum foil layer 9 blocks and closes the top openings of all the receiving grooves 7 on the outer surface of the flame retardant layer 6, and a second foam insulation layer 10 is provided between the aluminum foil layer 9 and the protective layer 4.

[0019] The receiving groove 7 is cylindrical, the depth of the receiving groove 7 is half the thickness of the flame retardant layer 6, the diameter of the receiving groove 7 is 10 to 20 mm, and the spacing between adjacent receiving grooves 7 is 10 to 20 mm; the insulating layer 2 is made of chlorinated polyethylene; the shielding layer 3 is made of red copper shielding mesh; the protective layer 4 is made of silicone rubber; the first foam insulation layer 5 and the second foam insulation layer 10 are both made of foamed polyethylene; the flame retardant layer 6 is made of PVC.

[0020] Working principle: The conductive core 1 is covered in sequence with an insulating layer 2 made of chlorinated polyethylene, a shielding layer 3 made of red copper shielding mesh, a first foam insulation layer 5 made of foamed polyethylene, a flame retardant layer 6 made of PVC, an aluminum foil layer 9, a second foam insulation layer 10 made of foamed polyethylene, and a protective layer 4 made of silicone rubber. Among them, the insulating layer 2, the shielding layer 3, the first foam insulation layer 5, the flame retardant layer 6, the aluminum foil layer 9, the second foam insulation layer 10 and the protective layer 4 all have good flame retardant properties; the first foam insulation layer 5 and the second foam insulation layer 10 can effectively prevent the external temperature from being transferred inward and thus melting and damaging the internal structure; the insulating layer 2 and the aluminum foil layer 9 form a double-layer electromagnetic shielding with good shielding performance; the multiple receiving grooves 7 on the flame retardant layer 6 are filled with flame retardants, which greatly improves the fire retardant performance; because the first foam insulation layer 5 and the second foam insulation layer The low-density foaming characteristics of layer 10 make it weak in strength and easy to deform and bend. At the same time, the receiving groove 7 in the flame retardant layer 6 is cylindrical, and the depth of the receiving groove 7 is half the thickness of the flame retardant layer 6. The diameter of the receiving groove 7 is 10 to 20 mm, and the spacing between adjacent receiving grooves 7 is 10 to 20 mm, which reduces the hardness of the flame retardant layer 6 itself, making it easier to deform and bend, making it more convenient to bend and lay the cable; the outermost protective layer 4 is made of silicone rubber, which has good weather resistance, flame retardancy, strength and toughness, and can effectively protect the internal structure.

Claims

1. A fireproof and flame-retardant cable, comprising a conductive core (1), wherein the conductive core (1) is sequentially covered with an insulating layer (2), a shielding layer (3), and a protective layer (4); characterized in that: A first foamed heat-insulating layer (5) is provided between the shielding layer (3) and the protective layer (4), and a flame-retardant layer (6) is provided outside the first foamed heat-insulating layer (5); a plurality of receiving grooves (7) spaced apart in an array are provided on the outer surface of the flame-retardant layer (6), and a flame retardant is provided in each receiving groove (7); an aluminum foil layer (9) is provided outside the flame-retardant layer (6), and the aluminum foil layer (9) blocks and closes the top openings of all the receiving grooves (7) on the outer surface of the flame-retardant layer (6); a second foamed heat-insulating layer (10) is provided between the aluminum foil layer (9) and the protective layer (4).

2. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The receiving groove (7) is cylindrical, the depth of the receiving groove (7) is half the thickness of the flame retardant layer (6), the diameter of the receiving groove (7) is 10 to 20 mm, and the spacing between adjacent receiving grooves (7) is 10 to 20 mm.

3. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The insulating layer (2) is made of chlorinated polyethylene; the shielding layer (3) is made of red copper shielding mesh; and the protective layer (4) is made of silicone rubber.

4. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The first foamed heat-insulating layer (5) and the second foamed heat-insulating layer (10) are both made of foamed polyethylene.

5. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The flame retardant layer (6) is made of PVC.

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