Fire alarm cable

Abstract

The utility model discloses a fire alarm cable, which relates to the fire alarm cable field, and comprises an insulation outer sheath, a first wrapping tape and a cable assembly, the inner side of the insulation outer sheath is provided with an armored protection layer, the inner side of the armored protection layer is provided with an insulation inner sheath, and the insulation inner sheath is composed of a protection assembly. The protection assembly comprises a heat insulation layer, a fireproof layer, a fireproof layer and a waterproof layer, the first wrapping tape is arranged on the inner side of the insulation inner sheath, and a ground wire is arranged in the first wrapping tape. According to the fire alarm cable, by arranging the armored protection layer, the protection assembly and the cable assembly, in the use process of the fire alarm cable, the influence of mechanical force on the cable is reduced, mechanical damage in the cable laying and running process is borne, the integrity of the inner protection layer is ensured, and the excellent performance of the cable is ensured; meanwhile, different colors are beneficial to distinguishing different circuits during installation and maintenance, internal conductors can be isolated and protected, and workers can use the cable conveniently.

Description

Technical Field

[0001] This utility model relates to the field of fire alarm cables, specifically a fire alarm cable. Background Technology

[0002] Fire alarm cables are cables specifically designed for use in fire alarm systems. Their main function is to ensure the stable transmission of alarm signals when a fire occurs, thereby enabling the timely activation of fire-fighting facilities and evacuation guidance systems. Fire alarm cables also rapidly transmit alarm signals to the fire control center or supply power to fire-fighting equipment when a fire occurs.

[0003] However, current fire alarm cables still have some shortcomings. The protective structure of existing fire alarm cables is not fully considered. If the protective structure of fire alarm cables is not fully considered during use, the impact of external mechanical forces on the fire alarm cables may be ignored, which may cause the fire alarm cables to be unable to withstand mechanical damage during laying and operation, thereby causing damage to the fire alarm cables and making it inconvenient for staff to use the fire alarm cables. Utility Model Content

[0004] The purpose of this invention is to provide a fire alarm cable to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fire alarm cable, comprising an insulating outer sheath, a first wrapping tape, and a cable assembly. The inner side of the insulating outer sheath is provided with an armored protective layer, and the inner side of the armored protective layer is provided with an insulating inner sheath. The insulating inner sheath is composed of protective components, including a heat insulation layer, a fireproof layer, a fire-resistant layer, and a waterproof layer. The first wrapping tape is disposed inside the insulating inner sheath, and a ground wire is disposed inside the first wrapping tape. A second wrapping tape is disposed inside the first wrapping tape. The cable assembly is disposed inside the second wrapping tape, and the cable assembly includes a cable conductor, a black insulating layer, a red insulating layer, a white insulating layer, and a yellow insulating layer.

[0006] Furthermore, the insulating outer sheath is made of polyethylene, and the outer wall of the insulating outer sheath is provided with anti-slip texture, and the color of the insulating outer sheath is red.

[0007] Furthermore, the insulation layer is a polyvinyl chloride structure, and a fireproof layer is provided on the outside of the insulation layer, and the fireproof layer is a halogen-free, low-smoke, flame-retardant polyolefin structure.

[0008] Furthermore, a fire-resistant layer is provided on the outside of the fireproof layer, and the fire-resistant layer is of magnesium oxide structure. A waterproof layer is also provided on the outside of the fire-resistant layer, and the waterproof layer is of rubber structure.

[0009] Furthermore, the inner insulating sheath is provided with a tear cord, and the tear cord is made of nylon.

[0010] Furthermore, the first packing tape is an aluminum foil Mylar structure, and the second packing tape is a PET polyester tape structure.

[0011] Furthermore, the cable conductors are four in number, arranged symmetrically in a ring, and each conductor has a black insulating layer, a red insulating layer, a white insulating layer, and a yellow insulating layer on its outer side.

[0012] Furthermore, the black, red, white, and yellow insulating layers all have an LSZH structure, and the thickness of the black, red, white, and yellow insulating layers is the same.

[0013] This utility model provides a fire alarm cable, which has the following beneficial effects:

[0014] 1. This utility model is equipped with an armored protective layer and protective components. During the use of fire alarm cables, an armored protective layer is set on the outside of the inner insulating sheath. The main function of the armored protective layer is to reduce the impact of mechanical force on the cable, withstand mechanical damage during cable laying and operation, and ensure the integrity of the inner sheath. A fireproof layer is set on the outside of the heat insulation layer, and a fire-resistant layer is set on the outside of the fireproof layer. A waterproof layer is set on the outside of the fire-resistant layer. The heat insulation layer, which is a polyvinyl chloride structure, can prevent the high-temperature external environment from affecting the performance of the cable. The fireproof layer, which is a halogen-free, low-smoke, flame-retardant polyolefin structure, is composed of polyolefin blend resin, flame-retardant fillers, antioxidants, smoke inhibitors, etc., and has excellent properties such as low smoke, low toxicity, flame retardancy, and low corrosivity. The fire-resistant layer, which is a magnesium oxide structure, can make the cable more fire-resistant. The waterproof layer, which is a rubber structure, not only makes the cable waterproof, but also makes the cable have good insulation, ensuring long-term use by workers and facilitating the use of the cable.

[0015] 2. This utility model is equipped with a cable assembly. During the use of the fire alarm cable, a black insulation layer, a red insulation layer, a white insulation layer, and a yellow insulation layer are respectively provided on the outside of the four cable conductors. The use of four different colored insulation layers (black, red, white, and yellow) can distinguish the different functions of the cable, and the different colors help to distinguish different lines during installation and maintenance. It can isolate and protect the internal conductors. The structure is simple and convenient for staff to use the cable. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the appearance of a fire alarm cable according to the present invention;

[0017] Figure 2 This is a three-dimensional cross-sectional view of a fire alarm cable according to the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the first wrapping of the armored protective layer of a fire alarm cable according to this utility model.

[0019] In the diagram: 1. Insulating outer sheath; 2. Armored protective layer; 3. Insulating inner sheath; 4. Protective components; 401. Heat insulation layer; 402. Fireproof layer; 403. Fire-resistant layer; 404. Waterproof layer; 5. Tear rope; 6. First wrapping tape; 7. Ground wire; 8. Second wrapping tape; 9. Cable assembly; 901. Cable conductor; 902. Black insulation layer; 903. Red insulation layer; 904. White insulation layer; 905. Yellow insulation layer. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] like Figures 1-3 As shown, a fire alarm cable includes an insulating outer sheath 1, a first wrapping tape 6, and a cable assembly 9. An armored protective layer 2 is provided on the inner side of the insulating outer sheath 1. The insulating outer sheath 1 is made of polyethylene, and its outer wall has an anti-slip texture. The insulating outer sheath 1 is red in color. An insulating inner sheath 3 is provided on the inner side of the armored protective layer 2. The insulating inner sheath 3 is composed of protective components 4, and the protective components 4 include a heat insulation layer 401, a fireproof layer 402, and a fire-resistant layer 403. 03 and waterproof layer 404, heat insulation layer 401 is of polyvinyl chloride structure, and a fireproof layer 402 is provided on the outside of heat insulation layer 401, and the fireproof layer 402 is of halogen-free low smoke flame-retardant polyolefin structure. A fire-resistant layer 403 is provided on the outside of fireproof layer 402, and the fire-resistant layer 403 is of magnesium oxide structure. A waterproof layer 404 is provided on the outside of fire-resistant layer 403, and the waterproof layer 404 is of rubber structure. A tear rope 5 is provided inside the insulating inner sheath 3, and the tear rope 5 is of nylon structure.

[0022] The specific operation is as follows: an armored protective layer 2 is set between the outer insulating sheath 1 and the inner insulating sheath 3. The main function of the armored protective layer 2 is to reduce the impact of mechanical force on the cable, withstand mechanical damage during cable laying and operation, and ensure the integrity of the inner sheath. In addition, the inner insulating sheath 3 is composed of protective components 4. A fireproof layer 402 is set outside the heat insulation layer 401, and a fire-resistant layer 403 is set outside the fireproof layer 402. A waterproof layer 404 is set outside the fire-resistant layer 403 to ensure the long-term use of the cable by the staff. The inner insulating sheath 3 is equipped with a tear rope 5. The tear rope 5, which is made of nylon, can provide effective protection when the cable is torn by external force, reduce the risk of cable damage in harsh environments, and facilitate the use of the cable by the staff.

[0023] like Figure 1 and Figure 2 As shown, the first wrapping tape 6 is disposed inside the insulating inner sheath 3, and a ground wire 7 is disposed inside the first wrapping tape 6. A second wrapping tape 8 is disposed inside the first wrapping tape 6. The first wrapping tape 6 is an aluminum foil Mylar structure, and the second wrapping tape 8 is a PET polyester tape structure. The cable assembly 9 is disposed inside the second wrapping tape 8. The cable assembly 9 includes a cable conductor 901, a black insulating layer 902, a red insulating layer 903, a white insulating layer 904, and a yellow insulating layer 905. There are four cable conductors 901, which are arranged in a ring symmetrical distribution. The outer sides of the cable conductors 901 are respectively provided with a black insulating layer 902, a red insulating layer 903, a white insulating layer 904, and a yellow insulating layer 905. The black insulating layer 902, the red insulating layer 903, the white insulating layer 904, and the yellow insulating layer 905 are all LSZH structures, and the thickness of the black insulating layer 902, the red insulating layer 903, the white insulating layer 904, and the yellow insulating layer 905 is the same.

[0024] The specific operation is as follows: four cable conductors 901 are arranged in a ring symmetrically, and black insulation layer 902, red insulation layer 903, white insulation layer 904 and yellow insulation layer 905 are respectively set on the outside of the four cable conductors 901. Then, a second wrapping tape 8 with a PET polyester tape structure is set on the outside of the cable assembly 9. Next, a first wrapping tape 6 with an aluminum foil Mylar structure is set on the outside of the second wrapping tape 8, and a ground wire 7 is set inside the first wrapping tape 6. The ground wire 7 can safely introduce the current in case of lightning or leakage of electrical equipment into the ground, thereby protecting the safety of equipment and personnel. In addition, the first wrapping tape 6 is set on the inside of the insulating inner sheath 3 to facilitate the use of fire alarm cables by staff.

[0025] In summary, this fire alarm cable, according to Figures 1-3The structure shown illustrates that, during the use of fire alarm cables, firstly, an armored protective layer 2 is installed between the outer insulating sheath 1 and the inner insulating sheath 3. The main function of the armored protective layer 2 is to reduce the impact of mechanical forces on the cable, withstand mechanical damage during cable laying and operation, and ensure the integrity of the inner sheath. Furthermore, the inner insulating sheath 3 is composed of protective components 4, with a fireproof layer 402 installed outside the heat insulation layer 401, a fire-resistant layer 403 installed outside the fireproof layer 402, and a waterproof layer 404 installed outside the fire-resistant layer 403, ensuring long-term use of the cable by personnel. Additionally, the inner insulating sheath 3 contains a tear cord 5, which is made of nylon and provides effective protection when the cable is torn by external forces. To reduce the risk of cable damage in harsh environments, four cable conductors 901 are arranged in a ring-shaped symmetrical configuration. Black insulation layer 902, red insulation layer 903, white insulation layer 904, and yellow insulation layer 905 are respectively installed on the outer sides of the four cable conductors 901. Then, a second wrapping tape 8, with a PET polyester tape structure, is placed on the outer side of the cable assembly 9. Next, a first wrapping tape 6, with an aluminum foil Mylar structure, is placed on the outer side of the second wrapping tape 8. A ground wire 7 is installed inside the first wrapping tape 6. The ground wire 7 can safely conduct the current from lightning strikes or electrical equipment leakage to the ground, thereby protecting equipment and personnel. Furthermore, the first wrapping tape 6 is placed inside the inner insulating sheath 3 for convenient use by personnel on the fire alarm cable.

[0026] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A fire alarm cable comprising an insulating outer sheath (1), a first tape (6) and a cable assembly (9), characterised in that, The inner side of the insulating outer sheath (1) is provided with an armored protective layer (2), and the inner side of the armored protective layer (2) is provided with an insulating inner sheath (3). The insulating inner sheath (3) is composed of a protective component (4), and the protective component (4) includes a heat insulation layer (401), a fireproof layer (402), a fire-resistant layer (403), and a waterproof layer (404). The first wrapping tape (6) is provided inside the insulating inner sheath (3), and a ground wire (7) is provided inside the first wrapping tape (6). The second wrapping tape (8) is provided inside the first wrapping tape (6). The cable assembly (9) is provided inside the second wrapping tape (8), and the cable assembly (9) includes a cable conductor (901), a black insulating layer (902), a red insulating layer (903), a white insulating layer (904), and a yellow insulating layer (905).

2. A fire alarm cable according to claim 1, characterised in that, The insulating outer sheath (1) is made of polyethylene, and the outer wall of the insulating outer sheath (1) is provided with anti-slip texture, and the color of the insulating outer sheath (1) is red.

3. A fire alarm cable according to claim 1, wherein, The heat insulation layer (401) is a polyvinyl chloride structure, and a fireproof layer (402) is provided on the outside of the heat insulation layer (401), and the fireproof layer (402) is a halogen-free, low-smoke, flame-retardant polyolefin structure.

4. A fire alarm cable according to claim 1, wherein, The fireproof layer (402) is provided with a fire-resistant layer (403) on the outside, and the fire-resistant layer (403) is a magnesium oxide structure. The fire-resistant layer (403) is provided with a waterproof layer (404) on the outside, and the waterproof layer (404) is a rubber structure.

5. A fire alarm cable according to claim 1, wherein, The inner insulating sheath (3) is provided with a tear cord (5) inside, and the tear cord (5) is made of nylon.

6. A fire alarm cable according to claim 1, wherein, The first packing tape (6) is an aluminum foil Mylar structure, and the second packing tape (8) is a PET polyester tape structure.

7. A fire alarm cable according to claim 1, wherein, The number of cable conductors (901) is four, and the four cable conductors (901) are arranged in a ring symmetrical distribution. The outer side of each cable conductor (901) is provided with a black insulation layer (902), a red insulation layer (903), a white insulation layer (904), and a yellow insulation layer (905).

8. A fire alarm cable according to claim 1, wherein, The black insulating layer (902), red insulating layer (903), white insulating layer (904), and yellow insulating layer (905) are all LSZH structures, and the thicknesses of the black insulating layer (902), red insulating layer (903), white insulating layer (904), and yellow insulating layer (905) are the same.

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