CN113096878B

CN113096878B - Anti-combustion cable

Info

Publication number: CN113096878B
Application number: CN202110380429.8A
Authority: CN
Inventors: 余和平; 陆梦来
Original assignee: Shenzhen Scrico Electronics Co ltd
Current assignee: Shenzhen Scrico Electronics Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2022-07-12
Anticipated expiration: 2041-04-08
Also published as: CN113096878A

Abstract

The invention discloses an anti-combustion cable which comprises a shell, wherein the shell comprises an outer protective layer, a sand layer and an inner protective layer which are sequentially arranged from outside to inside, a protective cavity is defined between the outer protective layer and the inner protective layer, and a plurality of heat dissipation areas and a plurality of installation areas which are arranged at intervals are formed in the protective cavity; the inner protective layer is provided with a plurality of heat dissipation holes along the inner direction and the outer direction, the heat dissipation holes are arranged in a heat dissipation area, and the sand layer is arranged in an installation area. In the invention, the shell can protect the wire core; the heat dissipation holes in the inner protective layer are communicated to the inside of the shell, namely the wire cores are located in the environment, the wire cores can be dissipated in the using process, and the phenomenon that fire is burnt due to overhigh running heat is avoided; when the external environment fires and burns, the sand layer can effectively prevent the fire from spreading to the inner protective layer, so that the inner protective layer and the wire core are protected in a certain time, and the purpose of preventing burning is achieved.

Description

Anti-combustion cable

Technical Field

The invention relates to the technical field of cables, in particular to an anti-burning cable.

Background

The application environment of the existing partial cable can generate flame burning, for example, when the cable is applied to high-rise buildings, underground railways, large power stations and industrial and mining environments, the cable is easy to be in the burning environment when a fire disaster happens. When flame burning occurs, ordinary cables are easily burnt and fused, so that lines are disconnected and ignited, related equipment faults are caused, and only when the cables have the fireproof characteristic, safe operation can be kept for a certain time under the condition of flame burning.

Disclosure of Invention

The invention mainly aims to provide a flame-proof cable, aiming at solving the problem that the traditional cable does not have the fire-proof property.

In order to achieve the purpose, the invention provides a flame-proof cable which comprises a shell, wherein the shell comprises an outer protective layer, a sand layer and an inner protective layer which are sequentially arranged from outside to inside, a protective cavity is defined between the outer protective layer and the inner protective layer, and a plurality of heat dissipation areas and a plurality of installation areas which are arranged at intervals are formed in the protective cavity;

the outer protection layer and/or the inner protection layer are/is provided with a plurality of heat dissipation holes along the inner direction and the outer direction, the heat dissipation holes are formed in the heat dissipation area, and the sand layer is arranged in the installation area.

Optionally, the sand layer comprises a first sand body spread out over the outer surface of the inner protective layer.

Optionally, the first sand body is fixedly bonded with the outer surface of the inner protection layer.

Optionally, the shell further comprises a plurality of elastic capsules, the elastic capsules are arranged at the installation areas in a one-to-one correspondence manner and are clamped between the outer protection layer and the inner protection layer, and second sand bodies are filled in the elastic capsules;

wherein the elastic bag body is made of a material which can be melted by heating.

Optionally, the elastic bag body is filled with a flame-retardant liquid.

Optionally, a plurality of concave portions are dispersedly distributed on the outer surface of the inner protection layer, the heat dissipation holes are formed in the concave portions, and the mounting area is defined between every two adjacent concave portions.

Optionally, the surface of the concave part is arc-surface-shaped.

Optionally, a convex part is defined between every two adjacent concave parts, the position of the convex part forms the installation area, and the surface of the convex part is arranged in an arc surface shape.

Optionally, the outer shell further comprises a gas permeable membrane disposed on an inner surface of the inner barrier layer.

Optionally, the thicknesses of the inner protection layer, the sand layer and the outer protection layer are sequentially reduced.

According to the technical scheme provided by the invention, the shell can protect the wire core; the heat dissipation holes in the inner protective layer are communicated to the inside of the shell, namely the wire cores are located in the environment, the wire cores can be dissipated in the using process, and the phenomenon that fire is burnt due to overhigh running heat is avoided; when the external environment fires and burns, the sand layer can effectively prevent the fire from spreading to the inner protective layer, so that the inner protective layer and the wire core are protected in a certain time, and the purpose of preventing burning is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a cross-sectional schematic view of one embodiment of a flame resistant cable provided by the present invention;

FIG. 2 is a schematic longitudinal sectional view of a portion of the fire resistant cable of FIG. 1, wherein the elastomeric bladder is not ruptured;

fig. 3 is a longitudinal sectional view of a portion of the structure of the fire-resistant cable of fig. 1, wherein the elastic bladder is ruptured. The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In view of the above, the present invention provides a fire-proof cable, referring to fig. 1 to 3, which show an embodiment of the fire-proof cable according to the present invention.

Referring to fig. 1 to 3, the fire-retardant cable 1 provided by the invention comprises an outer shell 100, wherein the outer shell 100 comprises an outer protective layer 110, a sand layer 120 and an inner protective layer 130 which are sequentially arranged from outside to inside, a protective cavity 140 is defined between the outer protective layer 110 and the inner protective layer 130, and the protective cavity 140 is formed with a plurality of heat dissipation areas and a plurality of installation areas which are arranged at intervals;

a plurality of heat dissipation holes 150 are formed through the outer protective layer 110 and/or the inner protective layer 130 along the inner and outer directions, the heat dissipation holes 150 are formed in the heat dissipation area, and the sand layer 120 is formed in the installation area.

In the technical scheme provided by the invention, the shell 100 can protect the wire core 200; the heat dissipation holes 150 on the inner protective layer 130 are communicated with the inside of the shell 100, namely the wire core 200 is located in the environment, so that the wire core 200 in the use process can be dissipated, and the phenomenon that the running heat is too high to cause fire burning is avoided; when the external environment catches fire and burns, the sand layer 120 can effectively prevent the fire from spreading to the inner protective layer 130, so that the inner protective layer 130 and the wire core 200 are protected to be complete in structure within a certain time, and the purpose of preventing the fire is achieved.

It is understood that the fire protection cable 1 comprises a cable body, which may refer to the entire section of the fire protection cable 1, but also to a partial section of the fire protection cable 1, for example a partial section mainly laid in a flammable environment; the cable body comprises a sheath 100 and a wire core 200, the wire core 200 being enclosed inside by the sheath 100. The specific representation form of the wire core 200 is not limited, and can be represented by any required shape, size, number, manufacturing material and arrangement mode; other structures are further included on the outer shell 100 or the cable main body, so that the cable main body has, for example, electromagnetic shielding functions and the like basically required by a conventional cable, and are not described in detail herein.

The material of the outer protective layer 110 and the inner protective layer 130 is not limited, and in a specific embodiment, the outer protective layer 110 is made of a rubber material, and the inner protective layer 130 may be made of a metal sheet. The outer protective layer 110 and the inner protective layer 130 are both substantially cylindrical, and the outer protective layer 110 is sleeved on the periphery of the inner protective layer 130; at least one supporting member may be further disposed between the outer protective layer 110 and the inner protective layer 130, that is, in the protective cavity 140, and opposite ends of the supporting member may be supported on the inner surface of the outer protective layer 110 and the outer surface of the inner protective layer 130, and the supporting member may be an elastic supporting rib.

The protection cavity 140 defines a plurality of heat dissipation areas and a plurality of installation areas, and the plurality of heat dissipation areas and the plurality of installation areas can be jointly spliced to form the complete protection cavity 140, or the plurality of heat dissipation areas and the plurality of installation areas can be arranged in only partial areas in the protection cavity 140. The respective and common arrangement modes of the plurality of heat dissipation areas and the plurality of mounting areas are not limited, and the heat dissipation areas and the mounting areas can be randomly distributed and also can be alternately arranged in sequence; may be arranged in an array, in a grid, in a radial pattern, or in a vortex ring, etc.

The heat dissipation holes 150 are disposed on the inner protective layer 130, but the heat dissipation holes 150 may be disposed on the outer protective layer 110 in other embodiments. The heat dissipation hole 150 is communicated with the inside of the housing 100, that is, the core 200, so that when more heat is generated at the core 200 during use, the heat can be dissipated through the heat dissipation hole 150, and the core 200 is prevented from accumulating excessive heat to be burnt and fused. Of course, the arrangement of the heat dissipation holes 150 is not limited, and the heat dissipation holes are distributed in each heat dissipation area, wherein each heat dissipation area may be provided with one or more heat dissipation holes 150; the plurality of heat dissipation holes 150 may be arranged in an array, a grid, a radial, or a vortex ring, as described above.

The sand layer 120 is arranged in the installation area, so that the heat dissipation holes 150 are not shielded by the sand layer 120 under normal conditions, and the blockage of the heat dissipation holes 150 is avoided. The selected material of the sand layer 120, the thickness of the sand layer 120, etc. may be determined according to actual needs. The thickness of the sand layer 120 needs to be set within a proper range, and it can be understood that when the thickness of the sand layer 120 is set to be larger, the content of sand in the anti-flaming cable 1 is easily increased, and the overall quality of the anti-flaming cable 1 is increased; on the contrary, when the thickness of the sand layer 120 is set to be small, the blocking effect of the sand layer 120 against the combustion flame is easily reduced.

The specific expression of the sand layer 120 is not limited. In one embodiment, the sand layer 120 includes a first sand body 121, and the first sand body 121 is spread on the outer surface of the inner protection layer 130. The first sand body 121 is uniformly spread on the entire outer surface of the inner protection layer 130, but does not shield the heat dissipation hole 150; even spreading of the first sand body 121 makes no matter in any direction when the fire burns or the outer protective layer 110 is fused at high temperature, the first sand body 121 can be retarded to a certain extent or the continuation of the fire or high temperature is prevented, so that the inner protective layer 130 is prevented from being damaged, and the wire core 200 in the inner protective layer 130 can be protected.

Specifically, in one embodiment, the first sand body 121 is adhesively fixed to the outer surface of the inner barrier 130. It can be understood that the outer surface of the inner protective layer 130 is uniformly coated with the adhesive, and the first sand body 121 is uniformly spread on the outer surface of the inner protective layer 130 through the adhesive, so that when the anti-combustion cable 1 is bent, folded, twisted and the like according to actual needs, the first sand body 121 can be relatively fixed with the outer surface of the inner protective layer 130, and the anti-combustion cable has the advantages of simple structure and convenience in operation.

On the basis of any of the above embodiments, further, the casing 100 further includes a plurality of elastic bladders 122, the plurality of elastic bladders 122 are correspondingly disposed at the plurality of mounting areas one to one and are sandwiched between the outer protective layer 110 and the inner protective layer 130, and second sand 123 is filled in the elastic bladders 122; the elastic bag 122 is made of a material that can be melted by heat.

It will be appreciated that the resilient bladder 122 is resiliently supported between the outer protective layer 110 and the inner protective layer 130, and is capable of damping any deformation between the inner protective layer 130 and the outer protective layer 110, as well as any external impacts, and thus helps to improve the protective properties of the outer shell 100.

Normally, the elastic bag body 122 is in a closed arrangement, that is, a closed bag cavity is formed, and the bag cavity is filled with the second sand body 123. Since the elastic bag body 122 is made of a heat-fusible material, when the fire-resistant cable 1 is subjected to high temperature and flame, causing the outer protective layer 110 to melt, break, or thin and transmitting the high temperature to the elastic bag body 122, the bag skin of the elastic bag body 122 is heated and melted, so that the second sand body 123 in the bag cavity is discharged into the protective cavity 140, and since the thickness of the protective cavity 140, that is, the distance between the inner protective layer 130 and the outer protective layer 110 is relatively small, the second sand body 123 can be pressed and gradually spread on the outer surface of the inner protective layer 130 after the elastic bag body 122 is broken.

Of course, there are various materials that can be melted by heat, such as related polymer materials, silica gel, rubber, etc., without limitation.

Further, in an embodiment, the elastic bag 122 is filled with a flame retardant liquid. The fire-retardant liquid is, for example, a common water body, the fire-retardant liquid is filled in the elastic bag body 122, and the second sand body 123 is sufficiently soaked, so that after the elastic bag body 122 is broken, the discharged second sand body 123 has better cooling and flame-retardant effects.

Next, referring to fig. 2 to 3, in an embodiment, a plurality of concave portions 131 are distributed on an outer surface of the inner protective layer 130, the heat dissipation holes 150 are disposed in the concave portions 131, and the mounting area is defined between every two adjacent concave portions 131. The depressed part 131 is closely adjacent to the installation area, so that after the elastic bag body 122 is broken, the discharged second sand body 123 can slide to the interior of the depressed part 131 on the peripheral side, and the depressed part 131 is limited, thereby being beneficial to improving the retention effect of the outer surface of the inner protective layer 130 on the second sand body 123, so that the second sand body 123 can overcome the influence of gravity and the like, and the outer surface of the inner protective layer 130 is uniformly spread.

Specifically, the surface of the recess 131 is formed in an arc shape. The cambered surface-shaped arrangement is easier to machine and form; in addition, the arc-surface-shaped arrangement has a larger accommodating space, and can accommodate more second sand bodies 123. Of course, the arc-surface arrangement can also form a good diversion surface, so that the second sand body 123 can be more smoothly guided into the concave part 131.

In addition, in an embodiment, a protruding portion 132 is defined between every two adjacent concave portions 131, the position of the protruding portion 132 constitutes the installation area, and the surface of the protruding portion 132 is arranged in an arc surface shape. The convex part 132 can form a required flow guiding surface, and the flow guiding surface of the convex part 132 can directly guide the second sand 123 in the ruptured elastic capsule 122 into the concave part 131 on the peripheral side; the raised portion 132 can also push the elastic bladder 122 against the inner surface of the outer protective layer 110, ensuring a secure installation of the elastic bladder 122 in the protective cavity 140.

Further, the particle size of the second sand body 123 is not smaller than the aperture of the heat dissipation hole 150, so as to prevent the second sand body 123 from entering the inner cavity of the inner protective layer 130, i.e. the wire core 200, from the heat dissipation hole 150. Alternatively, in another embodiment, the outer shell 100 further comprises a gas permeable membrane 160 disposed on the inner surface of the inner barrier 130. The gas-permeable film 160 does not obstruct gas from passing through the heat dissipation hole 150, and can sufficiently obstruct the second sand body 123 from entering the inner cavity of the inner protection layer 130, and the gas-permeable film 160 can also form at least a fourth protection of the wire core 200, which is helpful for improving the protection performance of the anti-burning cable 1.

In one embodiment, the thicknesses of the inner screen 130, the sand layer 120, and the outer screen 110 are sequentially decreased. So set up, make inner protection layer 130 can form sufficient thickness right sinle silk 200 protects, outer protection layer 110 can possess sufficient protection intensity under normal condition, and can improve the sensitivity to high temperature, flame, make outer protection layer 110 has sufficient sensitivity to predetermineeing the temperature range, can in time transmit heat to elasticity utricule 122 department.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The anti-combustion cable is characterized by comprising a shell, wherein the shell comprises an outer protection layer, a sand layer and an inner protection layer which are sequentially arranged from outside to inside, a protection cavity is defined between the outer protection layer and the inner protection layer, and a plurality of heat dissipation areas and a plurality of installation areas which are arranged at intervals are formed in the protection cavity;

the inner protection layer is provided with a plurality of heat dissipation holes along the inner direction and the outer direction, the heat dissipation holes are arranged in the heat dissipation area, and the sand layer is arranged in the installation area;

the shell further comprises a plurality of elastic bag bodies, the elastic bag bodies are arranged at the installation areas in a one-to-one correspondence mode and clamped between the outer protective layer and the inner protective layer, and second sand bodies and flame-retardant liquid are filled in the elastic bag bodies; the elastic bag body is made of a material which can be melted by heating;

a plurality of concave parts are distributed on the outer surface of the inner waterproof layer in a scattered manner, the heat dissipation holes are formed in the concave parts, the mounting area is defined between every two adjacent concave parts, and the surfaces of the concave parts are arranged in an arc surface shape;

every two adjacent depressed parts define a convex part between them, the position of the convex part forms the installation area, and the surface of the convex part is arranged in an arc surface shape.

2. The fire resistant cable of claim 1 wherein the sand layer comprises a first sand body that spreads over an outer surface of the inner layer.

3. The flame resistant cable of claim 2, wherein the first sand body is adhesively secured to the outer surface of the inner barrier layer.

4. The flame resistant cable of claim 1, wherein the outer jacket further comprises a gas permeable membrane disposed on an inner surface of the inner protective layer.

5. The fire resistant cable of claim 1 wherein the inner, sand and outer layers are sequentially of decreasing thickness.