Fireproof flame-retardant cable

Abstract

The utility model relates to the technical field of cables, in particular to a fireproof flame-retardant cable, which comprises a conductor, a lapping mica tape is lapped on the circumferential outer wall of the conductor, and an insulating layer is arranged outside the lapping mica tape. An isolating layer is arranged outside the insulating layer, and a lining layer is arranged outside the isolating layer. According to the utility model, the whole cable not only has a good flame-retardant effect, but also ensures that the cable does not contain halogen, does not generate toxic gas in the use process and during careless combustion, discharges extremely little acid gas, reduces the damage to personnel, instruments and equipment, and meanwhile, through the first flame-retardant sleeve and the second flame-retardant sleeve which are arranged on the inner side of the outer sheath, the flame-retardant effect is good. When the first flame-retardant sleeve and the second flame-retardant sleeve are broken, carbon dioxide and inert gas can be released, the inert gas can be pressed on the surface of the cable through the carbon dioxide gas, the surface of the cable is effectively isolated from air, the effect of isolating oxygen can be achieved, and then fireproof and flame-retardant effects of the cable are effectively achieved.

Description

Technical Field

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

[0002] With the continuous expansion of the power information network, the demand for power cables is also increasing. Cables, as a bridge for the transmission of power and information, play an important role in the transmission process. There are also many fires caused by electricity every year, among which fires caused by wires and cables are also one of the main reasons.

[0003] At present, in the process of using power cables, the flame retardant layer of existing power cables is relatively simple and has poor flame retardant effect. When the cable is short-circuited or encounters a fire, it is easy to cause the fire to spread further, thus affecting people's life and property safety. At the same time, most existing power cables use polyvinyl chloride as the outer sheath, so that when a fire occurs, polyvinyl chloride releases a large amount of halogen-containing toxic gas under combustion, and the smoke concentration is high, which is easy to inhale into the human body and cause poisoning and suffocation. Therefore, a fire-resistant and flame-retardant cable is urgently needed to solve the above problems. Utility Model Content

[0004] Based on the deficiencies in the prior art mentioned in the above background technology, the utility model provides a fire-resistant and flame-retardant cable.

[0005] The utility model overcomes the above technical problems by adopting the following technical solutions, specifically:

[0006] A fireproof and flame-retardant cable, comprising a conductor, wherein the outer circumferential wall of the conductor is wrapped with a mica tape, and an insulating layer is arranged outside the mica tape;

[0007] An isolation layer is arranged outside the insulating layer, an inner lining layer is arranged outside the isolation layer, an armor layer is arranged on the outer wall of the inner lining layer, and a flame retardant component is arranged outside the armor layer;

[0008] An outer sheath is arranged on the outside of the flame retardant component.

[0009] As a further solution of the utility model: a filling layer is arranged inside the isolation layer;

[0010] The filling material of the filling layer is fire-resistant rope.

[0011] As a further solution of the utility model: the number of the conductors is five groups, and the five groups of conductors are distributed in a circular shape with equal distances inside the isolation layer.

[0012] As a further solution of the utility model: a support member is arranged at the center of the isolation layer, and the circumferential outer wall of the insulation layer is in contact with the circumferential outer wall of the support member.

[0013] As a further solution of the utility model: the outer sheath is made of low-smoke halogen-free flame-retardant material.

[0014] As a further solution of the utility model: the flame retardant assembly includes a second flame retardant sleeve arranged on the circumferential outer wall of the armor layer, and the circumferential outer wall of the second flame retardant sleeve is provided with a first flame retardant sleeve;

[0015] A first cavity and a second cavity are respectively provided inside the first flame retardant sleeve and the second flame retardant sleeve;

[0016] The first cavity is filled with carbon dioxide gas, and the second cavity is filled with inert gas.

[0017] As a further solution of the utility model: the isolation layer is made of braided copper ribbons.

[0018] As a further solution of the utility model: the armor layer is made of copper material.

[0019] After adopting the above structure, the utility model has the following advantages compared with the prior art: the outer sheath of the outermost layer of the cable is made of low-smoke halogen-free flame retardant material, so that the cable as a whole not only has a good flame retardant effect, but also ensures that the cable is halogen-free, and no toxic gas is generated during use or when accidentally burned, and very little acid gas is emitted, reducing damage to personnel and equipment. At the same time, by arranging the first flame retardant sleeve and the second flame retardant sleeve on the inner side of the outer sheath, when the first flame retardant sleeve and the second flame retardant sleeve are broken, carbon dioxide and inert gas will be released. The carbon dioxide gas can suppress the inert gas on the surface of the cable, effectively isolating the cable surface from the air, and can play a role in isolating oxygen, thereby effectively realizing the fire retardancy of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the end face cross-sectional structure of the utility model.

[0021] Figure 2 For this utility model Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0022] Figure 3 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 4 For this utility model Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0024] In the figure: 1. outer sheath; 2. first flame retardant sleeve; 3. second flame retardant sleeve; 4. armor layer; 5. lining layer; 6. isolation layer; 7. filling layer; 8. insulation layer; 9. wrapped mica tape; 10. conductor; 11. support member; 12. first cavity; 13. second cavity. DETAILED DESCRIPTION

[0025] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0028] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0029] See also Figure 1 to Figure 4 In an embodiment of the utility model, a fire-retardant cable includes a conductor 10, a circumferential outer wall of the conductor 10 is wrapped with a mica tape 9, and an insulating layer 8 is arranged outside the mica tape 9;

[0030] An isolation layer 6 is arranged outside the insulating layer 8, an inner lining layer 5 is arranged outside the isolation layer 6, an armor layer 4 is arranged on the outer wall of the inner lining layer 5, and a flame retardant component is arranged outside the armor layer 4;

[0031] An outer sheath 1 is arranged outside the flame retardant component.

[0032] Preferably, a filling layer 7 is provided inside the isolation layer 6; the filling material of the filling layer 7 is fire-resistant rope.

[0033] Preferably, the number of the conductors 10 is five groups, and the five groups of conductors 10 are distributed in an equidistant circular pattern inside the isolation layer 6 .

[0034] Preferably, a support member 11 is provided at the center of the isolation layer 6 , and the circumferential outer wall of the insulation layer 8 is in contact with the circumferential outer wall of the support member 11 .

[0035] Preferably, the outer sheath 1 is made of low-smoke halogen-free flame retardant material. The outermost outer sheath 1 of the cable is made of low-smoke halogen-free flame retardant material, so that the cable as a whole not only has a good flame retardant effect, but also ensures that the cable is halogen-free, and no toxic gas is generated during use or when accidentally burned. The acid gas emitted is extremely small, reducing damage to personnel and equipment.

[0036] Preferably, the flame retardant assembly includes a second flame retardant sleeve 3 arranged on the circumferential outer wall of the armor layer 4, and the circumferential outer wall of the second flame retardant sleeve 3 is provided with a first flame retardant sleeve 2;

[0037] The first flame retardant sleeve 2 and the second flame retardant sleeve 3 are respectively provided with a first cavity 12 and a second cavity 13;

[0038] The interior of the first cavity 12 is filled with carbon dioxide gas, and the interior of the second cavity 13 is filled with inert gas. When the first flame retardant sleeve 2 and the second flame retardant sleeve 3 are ruptured by heat, carbon dioxide and inert gas will be released. The carbon dioxide gas can suppress the inert gas on the surface of the cable, effectively isolating the cable surface from the air, isolating oxygen, and effectively achieving fire retardancy of the cable.

[0039] Preferably, the isolation layer 6 is made of braided copper ribbons, which can ensure better contact between the insulation layer 8 and the conductor 10 and eliminate the increase in the electric field strength on the surface of the conductor 10 caused by the roughness of the surface of the conductor 10 .

[0040] Preferably, the armor layer 4 is made of copper material, which not only makes the cable have good fire resistance, but also makes it have a certain bending ability.

[0041] Working principle: The outer sheath 1 of the outermost layer of the cable is made of low-smoke halogen-free flame retardant material, so that the cable as a whole not only has a good flame retardant effect, but also ensures that the cable does not contain halogen. No toxic gas will be generated during use or when accidentally burned. Very little acid gas is emitted, reducing damage to personnel and equipment. At the same time, by arranging the first flame retardant sleeve 2 and the second flame retardant sleeve 3 on the inner side of the outer sheath 1, when the first flame retardant sleeve 2 and the second flame retardant sleeve 3 are broken, carbon dioxide and inert gas will be released. The carbon dioxide gas can suppress the inert gas on the surface of the cable, effectively isolating the cable surface from the air, and can play a role in isolating oxygen, thereby effectively realizing the fire retardancy of the cable.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention.

Claims

1. A fire-resistant and flame-retardant cable, comprising a conductor (10), characterized in that: The circumferential outer wall of the conductor (10) is wrapped with a mica tape (9), and an insulating layer (8) is arranged outside the mica tape (9); An isolation layer (6) is arranged outside the insulating layer (8), an inner lining layer (5) is arranged outside the isolation layer (6), an armor layer (4) is arranged on the outer wall of the inner lining layer (5), and a flame retardant component is arranged outside the armor layer (4); An outer sheath (1) is arranged outside the flame retardant component.

2. A fire-resistant and flame-retardant cable according to claim 1, characterized in that: A filling layer (7) is provided inside the isolation layer (6); The filling material of the filling layer (7) is fire-resistant rope.

3. A fire-resistant and flame-retardant cable according to claim 1, characterized in that: The number of the conductors (10) is five groups, and the five groups of conductors (10) are distributed in a circular shape at equal distances inside the isolation layer (6).

4. A fire-resistant and flame-retardant cable according to claim 1, characterized in that: A support member (11) is provided at the center of the isolation layer (6), and the circumferential outer wall of the insulating layer (8) is in contact with the circumferential outer wall of the support member (11).

5. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The outer sheath (1) is made of low-smoke halogen-free flame-retardant material.

6. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The flame retardant assembly comprises a second flame retardant sleeve (3) arranged on the circumferential outer wall of the armor layer (4), and the circumferential outer wall of the second flame retardant sleeve (3) is provided with a first flame retardant sleeve (2); A first cavity (12) and a second cavity (13) are respectively provided inside the first flame-retardant sleeve (2) and the second flame-retardant sleeve (3); The interior of the first cavity (12) is filled with carbon dioxide gas, and the interior of the second cavity (13) is filled with an inert gas.

7. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The isolation layer (6) is made of braided copper ribbons.

8. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The armor layer (4) is made of copper material.

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