Flame-spreading-free polyvinyl chloride flame-retardant cable

Abstract

The utility model belongs to the technical field of flame-retardant cables, and particularly relates to a flame-retardant polyvinyl chloride cable which comprises a cable core, an inner coating ring and an outer coating ring, the inner coating ring and the outer coating ring are arranged on the outer side of the cable core, and the inner coating ring and the outer coating ring are of a layered structure. An inner gasket is assembled on the outer side of the cable core, an outer gasket is arranged on the outer side of the inner gasket, and a material storage pipe for preventing flame from spreading is arranged between the inner gasket and the outer gasket; the outer side of the cable core is further provided with an inner wrapping layer, the outer side of the outer gasket is wound with an outer wrapping layer, and the inner wrapping layer and the outer wrapping layer limit the inner gasket and the outer gasket so as to prevent the inner gasket and the outer gasket from loosening during assembly and are also used for preventing flames from being directly transmitted inwards to damage the internal structure. According to the utility model, the continuous spreading of open fire can be effectively avoided, the open fire can be extinguished in time when encountering the open fire, the damage to the cable can be reduced to the greatest extent, and the subsequent maintenance and other treatment and use are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of flame-retardant cables, in particular to a flame-retardant polyvinyl chloride cable that does not delay combustion. Background Art

[0002] Flame-retardant cables are cables that have the ability to prevent or delay the occurrence or spread of flames. They can protect other equipment in the event of a fire and avoid causing greater losses. They are widely used in construction sites (especially high-rise buildings, fire doors, evacuation stairwells and other emergency evacuation and fire separation areas) and shopping malls, hotels, hospitals and other places for lighting, air conditioning and other auxiliary electrical equipment lines. In addition, public transportation such as subways, high-speed railways, and ships also need to pay special attention to safety, and flame-retardant cables have also been widely used in these transportation tools.

[0003] At present, in actual use, when the existing cables encounter fire and combustion, although they have flame retardant properties, once they are eroded by flames, the flames will still spread and burn, causing serious damage to the cables.

[0004] In order to solve the above problems, the present application proposes a flame retardant polyvinyl chloride cable that does not delay flame retardancy. Utility Model Content

[0005] The utility model aims to provide a flame retardant polyvinyl chloride cable which does not delay combustion and solves the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0007] The utility model discloses a flame-retardant polyvinyl chloride cable which does not extend the flame, comprising: a cable core and an inner sheathing ring and an outer sheathing ring on the outer side thereof, wherein the inner sheathing ring and the outer sheathing ring are of a layered structure; an inner washer is assembled on the outer side of the cable core, an outer washer is arranged on the outer side of the inner washer, and a material storage pipe for preventing the flame from spreading is arranged between the inner washer and the outer washer; an inner wrapping layer is also arranged on the outer side of the cable core, and an outer wrapping layer is wound around the outer side of the outer washer, and the inner washer and the outer washer are limited by the inner washer and the outer washer to prevent them from being loosened during assembly, and are also used to prevent the flame from being directly transmitted inward to damage the internal structure.

[0008] Furthermore, a storage cavity is formed between the outer gasket and the inner gasket to slow down the transfer of heat, and protruding side pads are provided at both ends of the outer gasket to press against the inner gasket to form a seal.

[0009] Furthermore, the interior of the material storage pipe is filled with fire-extinguishing fireproof blocking material.

[0010] Furthermore, positioning grooves for installing the material storage pipe are provided on the outer side of the inner gasket and the inner side of the outer gasket.

[0011] Furthermore, the internal sections of the material storage pipe are provided with partitions filled with fireproof blocking materials.

[0012] Furthermore, the inner wrapping layer, the inner gasket, the material storage tube, the outer gasket and the outer wrapping layer are arranged in sequence from the inside to the outside, and the wrapping structure is divided into a separated state of the inner wrapping ring and the outer wrapping ring.

[0013] Furthermore, the inner wrapping layer, inner gasket, material storage tube, outer gasket and outer wrapping layer are all laid out and wrapped around the cable core by an external mechanism to form an assembly when the cable core is transported.

[0014] The utility model has the following beneficial effects:

[0015] The utility model uses fire-proof plugging material filled inside the material storage tube, and when encountering an open flame and damaging the port of the material storage tube, the fire-proof plugging material filled inside will spray outward to achieve the effect of extinguishing the fire, preventing it from spreading, helping to alleviate the fire, and effectively reducing the impact on the cable and the loss;

[0016] The utility model can limit the storage tube to the inside of the positioning groove by laying the inner gasket and the outer gasket, and cooperate with the wrapping process to wrap the inner wrapping layer and the outer wrapping layer respectively on the inner and outer sides to form a combined coating. At this time, the combined mechanism is received inside the inner coating ring and the outer coating ring during the extrusion process to form a functional coating mechanism, so that the cable can adapt to more complex environments and improve its use effect.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cable cross-section structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the inner gasket and the outer gasket in the utility model in a combined state;

[0022] Figure 4 It is a partial enlarged structural schematic diagram of part A of the utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the material storage tube of the utility model;

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] In the figure: 1, cable core; 2, inner covering ring; 3, outer covering ring; 4, inner gasket; 5, outer gasket; 6, storage tube; 7, storage cavity; 8, side pad; 9, fireproof plugging material; 10, inner wrapping layer; 11, outer wrapping layer; 12, positioning groove; 13, partition. DETAILED DESCRIPTION

[0026] 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.

[0027] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] See also Figure 1-5 As shown, the utility model is a flame retardant polyvinyl chloride cable that does not delay flame retardancy, comprising: a cable core 1 and an inner sheath 2 and an outer sheath 3 on its outer side, wherein the inner sheath 2 and the outer sheath 3 are layered structures;

[0029] An inner gasket 4 is assembled on the outer side of the cable core 1, an outer gasket 5 is arranged on the outer side of the inner gasket 4, and a storage pipe 6 is arranged between the inner gasket 4 and the outer gasket 5 to prevent the spread of flames;

[0030] An inner wrapping layer 10 is also provided on the outer side of the cable core 1, and an outer wrapping layer 11 is wound around the outer side of the outer gasket 5. The inner wrapping layer 10 and the outer wrapping layer 11 limit the inner gasket 4 and the outer gasket 5 inward to prevent them from loosening during assembly, and are also used to prevent the flame from directly transmitting inward to damage the internal structure;

[0031] This embodiment provides a functionalized flame retardant fire extinguishing mechanism for the cable sheathing area, utilizing the storage tube 6 assembled before the extrusion process, which can be burned at one end to form an opening to spray out the medium filled inside to achieve a fire extinguishing effect, preventing the flame from spreading, thereby reducing damage to the cable.

[0032] A storage cavity 7 is formed between the outer gasket 5 and the inner gasket 4 to slow down the transfer of heat. Both ends of the outer gasket 5 are provided with protruding side pads 8 to press against the inner gasket 4 to form a seal and also to enhance the resistance to external forces.

[0033] The interior of the material storage pipe 6 is filled with fire-proof blocking material 9 for extinguishing fire, and the segmented filling method can avoid the waste caused by one-time spraying.

[0034] The outer side of the inner gasket 4 and the inner side of the outer gasket 5 are both provided with positioning grooves 12 for installing the material storage tube 6, so as to prevent the material storage tube 6 from being skewed in position.

[0035] The inner sections of the material storage pipe 6 are provided with partitions 13 filled with fireproof blocking material 9 .

[0036] The inner wrapping layer 10 , the inner gasket 4 , the material storage tube 6 , the outer gasket 5 and the outer wrapping layer 11 are arranged in sequence from the inside to the outside, and the wrapping structure is divided into a separation state of the inner wrapping ring 2 and the outer wrapping ring 3 .

[0037] The inner wrapping layer 10 , the inner gasket 4 , the material storage tube 6 , the outer gasket 5 and the outer wrapping layer 11 are all laid out and wrapped around the cable core 1 by an external mechanism to form an assembly when the cable core 1 is transported.

[0038] It can be understood that the utility model can effectively prevent the continued spread of open flames, and can promptly extinguish open flames when encountered, thereby minimizing damage to cables and facilitating subsequent maintenance and other processing uses.

[0039] A specific application of the operation process of this embodiment is: when producing cables, the rolled inner gasket 4 is placed outside by an external mechanism and bent into a semicircular structure to be coated on the outside of the inner winding layer 10 on the outer surface of the cable core 1, and then the storage tube 6 and the outer gasket 5 are placed outside in the same way, so that the storage tube 6 is limited inside the positioning groove 12 and is squeezed and limited by the outer gasket 5, and then the outer side of the outer gasket 5 is wrapped to form an outer winding layer 11 for coating. Finally, the inner gasket 4, the outer gasket 5, the storage tube 6, the inner winding layer 10 and the outer winding layer 11 are combined into an integrated structure and coated on the outside of the cable core 1. At this time, the extrusion process can be performed to store it between the inner coating ring 2 and the outer coating ring 3 1. After this treatment, when encountering an open flame and the partition 13 at the port of the storage tube 6 is burned off, the filled fire-proof plugging material 9 is automatically discharged outward for extinguishing the fire, so that the flame cannot continue to spread, thereby achieving a stable flame retardant effect and effectively reducing damage to the cable.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A flame retardant polyvinyl chloride cable, characterized in that: include: The cable core (1) and the inner covering ring (2) and the outer covering ring (3) on the outer side thereof, wherein the inner covering ring (2) and the outer covering ring (3) are layered structures; An inner gasket (4) is assembled on the outer side of the cable core (1), an outer gasket (5) is arranged on the outer side of the inner gasket (4), and a material storage pipe (6) is arranged between the inner gasket (4) and the outer gasket (5) to prevent the spread of flames; The outer side of the cable core (1) is also provided with an inner wrapping layer (10), and the outer side of the outer gasket (5) is wound with an outer wrapping layer (11). The inner wrapping layer (10) and the outer wrapping layer (11) limit the inner gasket (4) and the outer gasket (5) inwardly to prevent them from loosening during assembly, and are also used to prevent flames from directly transmitting inwardly to damage the internal structure.

2. The flame retardant polyvinyl chloride cable according to claim 1, characterized in that: A storage cavity (7) is formed between the outer gasket (5) and the inner gasket (4) to slow down the transfer of heat, and protruding side pads (8) are provided at both ends of the outer gasket (5) to press against the inner gasket (4) to form a seal.

3. The flame retardant polyvinyl chloride cable according to claim 1, characterized in that: The interior of the material storage pipe (6) is filled with fire-proof blocking material (9) for extinguishing fire.

4. The flame retardant polyvinyl chloride cable according to claim 1, characterized in that: The outer side of the inner gasket (4) and the inner side of the outer gasket (5) are both provided with positioning grooves (12) for installing the material storage pipe (6).

5. The flame retardant polyvinyl chloride cable according to claim 1, characterized in that: The internal sections of the material storage pipe (6) are provided with partitions (13) filled with fireproof blocking material (9).

6. The flame retardant polyvinyl chloride cable according to claim 1, characterized in that: The inner wrapping layer (10), the inner gasket (4), the material storage tube (6), the outer gasket (5) and the outer wrapping layer (11) are arranged in sequence from the inside to the outside, and the wrapping structure is divided into a separated state of the inner wrapping ring (2) and the outer wrapping ring (3).

7. The flame retardant polyvinyl chloride cable according to claim 1, characterized in that: The inner wrapping layer (10), the inner gasket (4), the material storage tube (6), the outer gasket (5) and the outer wrapping layer (11) are all assembled by wrapping the cable core (1) with the outer mechanism when the cable core (1) is transported.

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