Fire-resistant power cable with stainless steel metal sheath

Abstract

The utility model discloses a stainless steel metal sheath fire-resistant power cable, which relates to the technical field of power cables and comprises a cable core body, a muscovite tape insulating layer is arranged on the outer surface of the cable core body, and a belting layer is arranged on the outer surface of the muscovite tape insulating layer. A filling layer is arranged at the joint of the inner surface of the wrapping tape layer and the outer surface of the muscovite tape insulating layer, a mineral fireproof layer is arranged on the outer surface of the wrapping tape layer, a stainless steel metal sheath layer is arranged on the outer surface of the mineral fireproof layer, and an outer sheath layer is arranged on the outer surface of the stainless steel metal sheath layer. According to the utility model, through the relation among the muscovite tape insulating layer, the filling layer, the wrapping tape layer, the mineral fireproof layer, the stainless steel metal sheath layer and the outer sheath layer, the cable can have good electrical insulation performance, physical and mechanical performance, fireproof performance, flame retardant performance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a stainless steel metal sheathed fire-resistant power cable. Background Art

[0002] With the continuous development of science and technology, electrical equipment is more and more widely used in the production and life process. However, due to the heat generated during the use and operation of electrical equipment and other factors. Cables are prone to fire accidents, which brings huge safety hazards to people's lives. Whether in factories or buildings, the safety of electrical lines is crucial. According to statistics from relevant national departments, fires caused by electrical lines account for more than 50% of the causes of fire. Cables are both the main body of the line and the link that is difficult to protect. Therefore, cables must not only have the ability to resist external flame damage, but also have the characteristics of not generating fire sources themselves. Since the constituent materials of mineral insulated cables are uniformly inorganic, the insulator magnesium oxide will not generate open flames when overloaded or short-circuited. Therefore, lines composed of mineral insulated cables will never cause fires. If a fire is caused by other reasons, the cable will not only be tested by the raging fire, but also be continuously impacted by other falling objects. At this time, whether the cable can ensure the normal start-up of fire-fighting equipment, extinguish the fire and evacuate personnel without generating smoke and toxic gases is the key to evaluating the fire resistance of the line. Because the cable is not free from external interference during a fire, it will be continuously impacted by fire water, fire-falling objects and other heavy objects. We know that the fire resistance of organic (plastic) cables is achieved by the mica tape between the conductor and the insulation, and once the plastic fire-resistant cable is burned, the mica and insulation will form a hard shell and a carbon shell respectively. The carbon shell will conduct electricity when it meets water, and the mica hard shell will fall off when it meets water or other heavy objects. After many tests by foreign institutions, it has been proved that only mineral insulated cables can meet the test of BS6387 (British standard). Other fire-resistant cables (NH) that rely on mica insulation cannot guarantee that they will be powered on without any mistakes during a fire. Used in important electrical engineering fields, such as hazardous areas: airports, oil depots, liquefied gas stations, chemicals, coal mines, (nuclear) power stations, steel smelting and shipbuilding, etc.; advanced important public facilities: satellite ground stations, railway wiring, alarms, fire fighting, etc.; places to ensure the safety of life and property: historical buildings, hotels, high-rise buildings, museums, libraries, banks, hospitals, insurance, shopping malls, scientific research institutions, etc. Once the cable is laid, it can be used forever. Therefore, the flame retardant and fire resistant properties of wires and cables are very important.

[0003] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a stainless steel metal sheathed fire-resistant power cable is proposed. Utility Model Content

[0004] The utility model aims to provide a stainless steel metal sheathed fire-resistant power cable to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stainless steel metal sheathed fire-resistant power cable, comprising a cable core body, the outer surface of the cable core body is provided with a muscovite tape insulation layer, the outer surface of the muscovite tape insulation layer is provided with a tape layer, a filling layer is provided at the connection between the inner surface of the tape layer and the outer surface of the muscovite tape insulation layer, the outer surface of the tape layer is provided with a mineral fireproof layer, the outer surface of the mineral fireproof layer is provided with a stainless steel metal sheath layer, and the outer surface of the stainless steel metal sheath layer is provided with an outer sheath layer.

[0006] Furthermore, the cable core body is composed of at least five cable cores, and the cable cores are staggered and twisted.

[0007] Furthermore, the material of the insulating layer of the muscovite tape is an inorganic mineral insulating material.

[0008] Furthermore, the material of the mineral fireproof layer is fireproof mud.

[0009] Furthermore, the filling layer is made of flame-retardant filling rope.

[0010] Furthermore, the outer surface of the outer sheath layer is provided with protective threads, and the protective threads are evenly distributed.

[0011] Furthermore, an insulating layer is provided on the surface of the cable core body, and the insulating layer is made of a rubber layer.

[0012] Furthermore, a corrosion-resistant layer is provided on the surface of the stainless steel metal sheath layer, and the material of the corrosion-resistant layer is a polyurethane waterproof coating layer.

[0013] Furthermore, the thickness of the mineral fireproof layer is 0.12cm-0.14cm, and the thickness of the wrapping layer is 0.13cm-0.15cm.

[0014] Furthermore, the thickness of the stainless steel metal sheath layer is 0.21cm-0.23cm, and the thickness of the outer sheath layer is 0.22cm-0.24cm.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] Compared with the existing technology, the stainless steel metal sheathed fire-resistant power cable can have good electrical insulation performance, physical and mechanical properties, fire resistance and flame retardant properties through the relationship between the muscovite tape insulation layer, filling layer, tape layer, mineral fireproof layer, stainless steel metal sheath layer and outer sheath layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the insulation layer of the muscovite tape of the utility model;

[0019] Figure 3 It is a schematic diagram of the main structure of the utility model.

[0020] In the figure: 1. Cable core body; 2. Muscovite tape insulation layer; 3. Filling layer; 4. Tape layer; 5. Mineral fireproof layer; 6. Stainless steel metal sheath layer; 7. Outer sheath layer. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1: Figure 1-3 As shown, a stainless steel metal sheathed fire-resistant power cable comprises a cable core body 1, the outer surface of the cable core body 1 is provided with a white mica tape insulation layer 2, the outer surface of the white mica tape insulation layer 2 is provided with a tape layer 4, a filling layer 3 is provided at the connection between the inner surface of the tape layer 4 and the outer surface of the white mica tape insulation layer 2, a mineral fireproof layer 5 is provided on the outer surface of the tape layer 4, a stainless steel metal sheath layer 6 is provided on the outer surface of the mineral fireproof layer 5, an outer sheath layer 7 is provided on the outer surface of the stainless steel metal sheath layer 6, the cable core body is composed of at least five cable cores, and the cable cores are staggered and twisted, the material of the white mica tape insulation layer is an inorganic mineral insulation material, and the mineral fireproof layer 5 is provided on the outer surface of the stainless steel metal sheath layer 6. The material of the fire layer 5 is fireproof mud, the material of the filling layer 3 is flame-retardant filling rope, the outer surface of the outer sheath layer 7 is provided with protective threads, and the protective threads are evenly distributed, the surface of the cable core body 1 is provided with an insulating layer, and the material of the insulating layer is a rubber layer, the surface of the stainless steel metal sheath layer 6 is provided with a corrosion-resistant layer, and the material of the corrosion-resistant layer is a polyurethane waterproof coating layer, the thickness of the mineral fireproof layer 5 is 0.12cm-0.14cm, the thickness of the wrapping layer 4 is 0.13cm-0.15cm, the thickness of the stainless steel metal sheath layer 6 is 0.21cm-0.23cm, and the thickness of the outer sheath layer 7 is 0.22cm-0.24cm.

[0023] Working principle: Through the setting of the white mica tape insulation layer 2, the fire resistance of the cable can be guaranteed. Through the setting of the filling layer 3, the gap between the cables is filled with flame-retardant filling rope to ensure the high roundness of the finished product. Although a small amount of cost is added, it can make each part tight and fill as a whole, and can keep its outer diameter consistent during the production process, and the practicality and aesthetics are greatly improved. Through the setting of the wrapping layer 4, the isolation effect can be achieved, which can effectively reduce the generation of gaps, reduce the chance of contact between cables and air, reduce the possibility of conductor oxidation, and improve the insulation heat resistance, chemical resistance and fire resistance. Through the setting of the mineral fireproof layer 5, it can buffer the inside under normal circumstances. When encountering a fire, the high temperature will make it hard and integrated, like a city wall to protect the conductor inside from external collisions and water spraying. Through the setting of the stainless steel metal sheath layer 6, the inner layer structure is perfectly separated from the outside world, preventing air and water vapor in the environment from entering the cable, so that it can run stably. Under normal conditions, it can greatly increase the service life and reliability, and can be used all the time without accidents.

[0024] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A stainless steel metal sheathed fire-resistant power cable, comprising a cable core body (1), characterized in that: The outer surface of the cable core body (1) is provided with a white mica tape insulation layer (2), the outer surface of the white mica tape insulation layer (2) is provided with a tape wrapping layer (4), a filling layer (3) is provided at the connection between the inner surface of the tape wrapping layer (4) and the outer surface of the white mica tape insulation layer (2), the outer surface of the tape wrapping layer (4) is provided with a mineral fireproof layer (5), the outer surface of the mineral fireproof layer (5) is provided with a stainless steel metal sheath layer (6), and the outer surface of the stainless steel metal sheath layer (6) is provided with an outer sheath layer (7).

2. The stainless steel metal sheathed fire-resistant power cable according to claim 1, characterized in that: The cable core body is composed of at least five cable cores, and the cable cores are interlaced and twisted.

3. The stainless steel metal sheathed fire-resistant power cable according to claim 1, characterized in that: The material of the insulating layer of the muscovite tape is an inorganic mineral insulating material.

4. The stainless steel metal sheathed fire-resistant power cable according to claim 1, characterized in that: The material of the mineral fireproof layer (5) is fireproof mud.

5. The stainless steel metal sheathed fire-resistant power cable according to claim 1, characterized in that: The material of the filling layer (3) is flame-retardant filling rope.

6. The stainless steel metal sheathed fire-resistant power cable according to claim 1, characterized in that: The outer surface of the outer sheath layer (7) is provided with protective threads, and the protective threads are evenly distributed.

7. The stainless steel metal sheathed fire-resistant power cable according to claim 1, characterized in that: An insulating layer is provided on the surface of the cable core body (1), and the material of the insulating layer is a rubber layer.

8. The stainless steel metal sheathed fire-resistant power cable according to claim 1, characterized in that: The surface of the stainless steel metal sheath layer (6) is provided with a corrosion-resistant layer, and the material of the corrosion-resistant layer is a polyurethane waterproof coating layer.

9. The stainless steel metal sheathed fire-resistant power cable according to claim 4, characterized in that: The thickness of the mineral fireproof layer (5) is 0.12cm-0.14cm, and the thickness of the wrapping layer (4) is 0.13cm-0.15cm.

10. The stainless steel metal sheathed fire-resistant power cable according to claim 6, characterized in that: The thickness of the stainless steel metal sheath layer (6) is 0.21 cm-0.23 cm, and the thickness of the outer sheath layer (7) is 0.22 cm-0.24 cm.

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