Fireproof cable

Abstract

The utility model discloses a fireproof cable, which relates to the field of cables and comprises an outer sheath, an inner lining layer is connected inside the outer sheath in a gluing manner, an inner lining structure is arranged on the inner side of the inner lining layer and comprises an outer arc plate and six groups of inner supports, and the outer arc plate and the inner supports are arranged in parallel. Each group of inner brackets is composed of two symmetrically arranged wavy sheets, the two wavy sheets are fixedly connected with the outer arc plate, a wire core is embedded into the inner side of each group of inner brackets, a gap is reserved between each group of inner brackets and the wire core, and the gap is filled with flame-retardant filler. According to the fireproof cable provided by the utility model, the inner support is matched with the outer arc plate to form the lining structure, so that when the cable is pressed, the flame-retardant filler is primarily protected from being damaged by pressure, the compactness of the flame-retardant filler is ensured, the flame-retardant effect is improved, the wire cores can be protected, and the practical safety of the wire cores is improved.

Description

Technical Field

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

[0002] A cable is a device that plays a role in power transmission in an electrical system and serves as a bridge in the electrical system. A fireproof cable is a cable filled with fireproof filler inside. When the cable catches fire due to high temperature, short circuit, etc., the fireproof filler can play a role in suppressing the fire.

[0003] However, the existing fireproof cables have problems of poor compressive and bending resistance. First of all, since the outside of the cable is soft, it will deform under pressure, and the deformation will squeeze other structures inside the cable, including the wire core, which is likely to cause damage to the wire core. And the inside of the fireproof cable is filled with flame retardant filler. When the cable is under pressure, the flame retardant filler will be cracked, resulting in the problem of impaired flame retardant effect.

[0004] Therefore, a fireproof cable is proposed to solve the above technical problems. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a fireproof cable, which can effectively solve the technical problems in the background art.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A fireproof cable includes an outer sheath. An inner lining layer is adhesively connected inside the outer sheath. An inner lining structure is arranged inside the inner lining layer. The inner lining structure includes an outer arc plate and an inner support. There are six groups of inner supports. Each group of inner supports is composed of two symmetrically arranged wavy sheets, and the two wavy sheets are fixedly connected to the outer arc plate. A wire core is embedded inside each group of inner supports.

[0008] As a further scheme of the utility model, a gap is left between each group of inner supports and the wire core, and the gap is filled with flame retardant filler.

[0009] As a further scheme of the utility model, a gap is left between the six groups of inner supports and the inner lining layer, and the gap is filled with fireproof filler.

[0010] As a further scheme of the utility model, the six groups of inner supports are connected by a round tube. A flame retardant structure is arranged inside the round tube. The flame retardant structure includes a number of envelopes. The envelopes are inserted inside the round tube, and a connecting rod is connected between each adjacent envelope. Dry powder filler is filled into the envelopes under high pressure.

[0011] As a further scheme of the utility model, the connecting rod is made of rubber material.

[0012] As a further solution of the present utility model, the outer surface of the outer sheath is sprayed with marking lines, and the marking lines correspond to the envelopes one by one.

[0013] The beneficial effects of the present utility model are as follows:

[0014] By setting the inner lining structure, the inner lining structure composed of the inner support and the outer arc plate can, when the cable is under pressure, initially protect the flame retardant filler from being damaged by pressure, ensure the compactness of the flame retardant filler, improve the flame retardant effect, and at the same time can also protect the wire core and improve the practical safety of the wire core;

[0015] By setting the flame retardant structure, when the cable is on fire, the envelope is damaged, and the dry powder filler inside it explodes, playing a role in extinguishing fire, further improving the safety of cable use, and reducing the problem of the spread of fire along the cable laying direction. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of a fireproof cable of the present utility model;

[0017] Figure 2 It is a structural diagram of the envelope of a fireproof cable of the present utility model;

[0018] Figure 3 It is a sectional view of the envelope of a fireproof cable of the present utility model;

[0019] Figure 4 It is a front view of a fireproof cable of the present utility model.

[0020] In the figure: 1. Outer sheath; 2. Inner lining layer; 3. Inner lining structure; 4. Outer arc plate; 5. Inner support; 6. Fireproof filler; 7. Wire core; 8. Flame retardant structure; 9. Envelope; 10. Connecting rod; 11. Dry powder filler. Detailed Embodiments

[0021] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] As Figures 1-4 shown, a fireproof cable includes an outer sheath 1, an inner lining layer 2 is adhesively connected inside the outer sheath 1, an inner lining structure 3 is provided inside the inner lining layer 2, the inner lining structure 3 includes an outer arc plate 4 and an inner support 5, there are six groups of inner supports 5, each group of inner supports 5 is composed of two symmetrically arranged wavy sheets, and the two wavy sheets are fixedly connected to the outer arc plate 4, and a wire core 7 is embedded inside each group of inner supports 5.

[0023] In this embodiment, there is a gap between each inner support 5 and the core 7, and the gap is filled with a flame-retardant filler;

[0024] On the one hand, the flame-retardant filler can increase the density inside the cable, and on the other hand, it can also improve the flame-retardant performance of the cable.

[0025] In this embodiment, there is a gap between the six groups of inner supports 5 and the inner liner 2, and the gap is filled with a fireproof filler 6;

[0026] The fireproof filler 6 can greatly improve the fireproof performance of the cable. When the cable catches fire due to short circuit, high temperature and other situations, it can reduce the spread of the fire.

[0027] In this embodiment, the six groups of inner supports 5 are connected by a circular tube. The inside of the circular tube is provided with a flame-retardant structure 8. The flame-retardant structure 8 includes a number of envelopes 9. The envelopes 9 are inserted into the inside of the circular tube, and a connecting rod 10 is connected between each adjacent envelope 9. The inside of the envelope 9 is filled with dry powder filler 11 under high pressure;

[0028] The envelope 9 can be burned out when the cable catches fire. After being burned out, the dry powder filler 11 filled under high pressure inside it will explode, thus playing a role in passive fire extinguishing.

[0029] In this embodiment, the connecting rod 10 is made of rubber;

[0030] The connecting rod 10 made of rubber can achieve the effects of flexible connection and insulation.

[0031] In this embodiment, a marking line is sprayed on the outer surface of the outer sheath 1, and the marking line corresponds to the envelope 9 one by one;

[0032] The marking line can play an indicating role. When cutting the cable, it can accurately cut to the connecting rod 10 and avoid cutting the envelope 9.

[0033] It should be noted that the present utility model is a fireproof cable. When in use, the cutting position is determined through the marking line on the outer surface of the outer sheath 1, and the cable is cut from the position of the connecting rod 10. Then, the outer sheath 1, the inner liner 2 and the core 7 are peeled off. One end of the core 7 is connected to the power supply device, and the other end is connected to the electrical equipment, so as to play the role of circuit circulation. When the cable catches fire due to high temperature, fire, short circuit and other situations, first of all, the fireproof filler 6 can play a preliminary fireproof role. When the flame burns to the envelope 9, the envelope 9 is damaged, and the dry powder filler 11 filled under high pressure inside it is ejected, thus playing a role in fire extinguishing. When the cable is pressed, the inner support 5 and the outer arc plate 4 can play an excellent supporting effect. First, it reduces the degree of cable deformation and reduces the phenomenon of the flame-retardant filler 8 being damaged. Second, it reduces the problem of the core 7 being pressed and improves the safety of cable use.

[0034] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.

Claims

1. A fire-resistant cable, comprising an outer sheath (1), and an inner lining layer (2) is adhesively connected inside the outer sheath (1), characterized in that: An inner lining structure (3) is provided on the inner side of the inner lining layer (2). The inner lining structure (3) includes an outer arc plate (4) and an inner support (5). There are six groups of the inner supports (5). Each group of the inner supports (5) is composed of two symmetrically arranged wavy sheets, and the two wavy sheets are fixedly connected to the outer arc plate (4). A wire core (7) is embedded in the inner side of each group of the inner supports (5).

2. The fireproof cable according to claim 1, characterized in that: A gap is left between each group of the inner supports (5) and the wire core (7), and a flame-retardant filler is filled in the gap.

3. A fireproof cable according to claim 1, characterized in that: A gap is left between the six groups of the inner supports (5) and the inner lining layer (2), and a fireproof filler (6) is filled in the gap.

4. A fireproof cable according to claim 1, characterized in that: The six groups of the inner supports (5) are connected by a circular tube. A flame-retardant structure (8) is arranged inside the circular tube. The flame-retardant structure (8) includes a plurality of envelopes (9). The envelopes (9) are inserted into the inside of the circular tube, and a connecting rod (10) is connected between each adjacent envelope (9). Dry powder filler (11) is filled into the inside of the envelope (9) under high pressure.

5. A fireproof cable according to claim 4, characterized in that: The connecting rod (10) is made of rubber material.

6. A fireproof cable according to claim 4, characterized in that: A marking line is sprayed on the outer surface of the outer sheath (1), and the marking line corresponds to the envelope (9) one by one.

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