Halogen-free flame-retardant fireproof cable

Abstract

The utility model belongs to the technical field of fire-resistant cables, and particularly relates to a halogen-free flame-retardant fire-resistant cable, which comprises a sheath layer, a conductor layer is sleeved with the sheath layer, a spiral hot melting liquid storage belt and a wear-resistant buffer framework are arranged on the outer side of the sheath layer, and the wear-resistant buffer framework is arranged on the outer side of the sheath layer. The edge of the hot melting liquid storage belt is bonded to the outer side of the sheath layer, a sealed cavity structure used for containing flame-retardant liquid is formed between the hot melting liquid storage belt and the sheath layer, and a plurality of energy absorption sections and supporting sections are formed on the abrasion-resistant buffering framework at intervals. On the premise that normal bending of the sheath layer is not affected, the wear-resistant buffer framework plays an effective role in buffer protection, so that the surfaces of the hot melting liquid storage belt and the sheath layer are not worn; the spirally-arranged hot melting liquid storage belt can be heated to crack and release flame-retardant liquid when any position of the sheath layer is in contact with open fire so as to play a role in comprehensively protecting the sheath layer, and the self volume can be well reduced, and the dead weight of the cable can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of fire-resistant cables, and in particular relates to a halogen-free flame-retardant fire-resistant cable. Background Art

[0002] Low-smoke halogen-free cable refers to an environmentally friendly cable made of rubber materials that does not contain halogen (F, Cl, Br, I, At) and does not contain environmental substances such as lead, cadmium, chromium, mercury, etc., and does not emit toxic smoke (such as hydrogen halide, carbon monoxide, etc.) when burned. Low-smoke halogen-free flame retardant halogen-free cable is suitable for places with rated voltage of 450 / 750V and below, and with halogen-free, low-smoke, flame retardant requirements and high safety and environmental protection requirements.

[0003] In order to improve the flame retardant effect of the cable, the utility model patent with authorization announcement number CN217767932U discloses a low-smoke halogen-free flame retardant and fire-resistant cable. When the cable encounters an open flame and spontaneously ignites, the open flame will first contact the cable outer casing. When the open flame contacts the flame retardant ring, a gap will appear on the outside of the flame retardant ring. The flame retardant liquid stored in the inner end of the liquid accumulation cavity will overflow along the gap and contact the open flame, thereby preventing the fire from continuing to burn, protecting the cable to the maximum extent, and improving the fire resistance of the cable.

[0004] However, in the above structure, in order for the flame retardant ring to effectively have a gap when any area of ​​the cable is heated, it is necessary to set the liquid accumulation chamber around the entire cable. This structure greatly increases the overall weight of the cable, and because the cable is broken due to surface wear during laying, it is easy to cause the flame retardant liquid in the liquid accumulation chamber surrounding the outer side of the cable to leak out. Utility Model Content

[0005] In view of the above problems, the purpose of the utility model is to provide a halogen-free flame-retardant and fire-resistant cable to solve the problem that the existing cable greatly increases the weight of the cable by setting a liquid accumulation cavity to improve the flame retardant effect, and the cable also has the problem that the surface is easily worn and ruptured, resulting in leakage of flame retardant liquid.

[0006] To achieve the above objectives, the utility model adopts the following technical solution: a halogen-free flame-retardant and fire-resistant cable, comprising a sheath layer, wherein the sheath layer is wrapped around the outside of the conductor layer, and a spiral hot-melt liquid storage belt and a wear-resistant buffer skeleton are arranged on the outside of the sheath layer, the edge of the hot-melt liquid storage belt is bonded to the outside of the sheath layer and a sealed cavity structure for containing flame-retardant liquid is formed between the hot-melt liquid storage belt and the sheath layer, and a plurality of energy-absorbing sections and supporting sections are formed at intervals on the wear-resistant buffer skeleton.

[0007] The beneficial effects of the utility model are as follows: the wear-resistant buffer skeleton plays an effective buffering and protective role without affecting the normal bending of the sheath layer, so that the surface of the hot-melt liquid storage belt and the sheath layer is not worn; the hot-melt liquid storage belt arranged in a spiral shape can not only rupture when exposed to open flame at any point of the sheath layer, but also release flame-retardant liquid when it is heated to fully protect the sheath layer, and can also better reduce its own volume and reduce the cable's own weight.

[0008] In order to arrange the hot melt liquid storage belt and the wear-resistant buffer frame neatly and orderly on the outside of the sheath layer;

[0009] As a further improvement of the above technical solution: the hot-melt liquid storage belt and the wear-resistant buffer skeleton are arranged in parallel.

[0010] The beneficial effect of this improvement is that the hot-melt liquid storage belt and the wear-resistant buffer skeleton arranged in parallel can be bent along with the sheath layer, which not only ensures the neatness of the cable appearance, but also enables the sheath layer to be effectively bent and laid for use.

[0011] In order to effectively protect the hot melt storage belt through the use of wear-resistant buffer skeleton;

[0012] As a further improvement of the above technical solution: the energy absorbing section and the supporting section are both elastic arc-shaped plate structures, the inner wall of the energy absorbing section fits the outer surface of the sheath layer, and the axis of the supporting section is located outside the hot-melt liquid storage belt.

[0013] The beneficial effects of this improvement are as follows: the end of the supporting section rubs against the ground or other contact surfaces, thereby preventing the sheath layer and the hot-melt liquid storage belt from being damaged by friction with other objects; at the same time, when the sheath layer is stepped on or squeezed by other equipment, the force acting on the sheath layer is transmitted to the energy-absorbing section, and the energy-absorbing section drives the supporting section to produce elastic deformation, thereby achieving the effect of buffering and absorbing energy, and further effectively protecting the surface of the hot-melt liquid storage belt and the sheath layer.

[0014] In order to effectively store flame retardant liquids;

[0015] As a further improvement of the above technical solution: the cavity structure formed between the hot-melt liquid storage belt and the sheath layer is a spiral cavity.

[0016] The beneficial effect of this improvement is that after the edge of the hot melt liquid storage tape is bonded to the sheath layer, a spiral cavity that effectively accommodates the flame retardant liquid is formed between the hot melt liquid storage tape and the sheath layer to effectively store the flame retardant liquid in the extension direction of the sheath layer.

[0017] In order to make the flame retardant liquid flow effectively on the surface of the sheath layer after the hot melt liquid storage tape is damaged to achieve a better flame retardant effect;

[0018] As a further improvement of the above technical solution: the pitch of the hot-melt liquid storage belt is not greater than 2 cm.

[0019] The beneficial effect of this improvement is that after the hot-melt liquid storage tape is damaged, the flame-retardant liquid filled in the hot-melt liquid storage tape can cover the surface of the surrounding sheath layer, thereby achieving heat-resistant protection for the sheath layer.

[0020] In order to facilitate the installation of the wear-resistant buffer frame;

[0021] As a further improvement of the above technical solution: the wear-resistant buffer skeleton and the sheath layer are clearance-fitted.

[0022] The beneficial effect of this improvement is that the wear-resistant buffer skeleton can be slidably sleeved on the outside of the sheath layer, thereby reducing the difficulty of assembling the entire cable.

[0023] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional structural diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the utility model;

[0026] Figure 3 It is a structural schematic diagram of the hot melt liquid storage belt in the utility model;

[0027] Figure 4 It is a schematic diagram of the structure of the wear-resistant buffer skeleton in the utility model;

[0028] In the figure: 1, sheath layer; 2, conductor layer; 3, hot-melt liquid storage belt; 4, wear-resistant buffer skeleton; 41, energy absorption section; 42, support section. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0030] Embodiment 1:

[0031] like Figure 1—4 shows: a halogen-free flame-retardant and fire-resistant cable, comprising a sheath layer 1, wherein the sheath layer 1 is wrapped around the outside of the conductor layer 2, and a spiral hot-melt liquid storage tape 3 and a wear-resistant buffer skeleton 4 are arranged on the outside of the sheath layer 1, the edge of the hot-melt liquid storage tape 3 is bonded to the outside of the sheath layer 1, and a sealed cavity structure for containing flame-retardant liquid is formed between the hot-melt liquid storage tape 3 and the sheath layer 1, and a plurality of energy-absorbing sections 41 and supporting sections 42 are formed at intervals on the wear-resistant buffer skeleton 4, and the wear-resistant buffer skeleton 4 plays an effective buffering and protective role without affecting the normal bending of the sheath layer 1, so that the hot-melt liquid storage tape 3 and The surface of the sheath layer 1 is not subject to wear; the hot-melt liquid storage belt 3 arranged in a spiral shape can not only rupture when exposed to open flame at any point of the sheath layer 1 and release the flame-retardant liquid to fully protect the sheath layer 1, but also can reduce its own volume and reduce the dead weight of the cable. The hot-melt liquid storage belt 3 and the wear-resistant buffer skeleton 4 are arranged in parallel, and the parallel hot-melt liquid storage belt 3 and the wear-resistant buffer skeleton 4 can be bent with the sheath layer 1, which not only ensures the neatness of the cable appearance, but also enables the sheath layer 1 to be effectively bent and laid for use. The energy absorbing section 41 and the supporting section 42 are both elastic arc-shaped plate structures. The energy absorbing section 41 The inner wall of the support section 42 fits the outer surface of the sheath layer 1, the axis of the support section 42 is located on the outside of the hot-melt liquid storage belt 3, and the end of the support section 42 rubs against the ground or other contact surfaces to prevent the sheath layer 1 and the hot-melt liquid storage belt 3 from being damaged by friction with other objects. At the same time, when the sheath layer 1 is stepped on or squeezed by other equipment, the force applied to the sheath layer 1 is transmitted to the energy absorbing section 41, and the energy absorbing section 41 drives the support section 42 to produce elastic deformation, thereby achieving the effect of buffering energy absorption, further effectively protecting the surfaces of the hot-melt liquid storage belt 3 and the sheath layer 1, and the cavity structure formed between the hot-melt liquid storage belt 3 and the sheath layer 1 is a spiral Spiral cavity, after the edge of the hot-melt liquid storage tape 3 is bonded to the sheath layer 1, a spiral cavity that effectively contains the flame-retardant liquid is formed between the hot-melt liquid storage tape 3 and the sheath layer 1, so as to effectively store the flame-retardant liquid in the extension direction of the sheath layer 1. The pitch of the hot-melt liquid storage tape 3 is not greater than 2 cm. After the hot-melt liquid storage tape 3 is damaged, the flame-retardant liquid filled in the hot-melt liquid storage tape 3 can cover the surface of the surrounding sheath layer 1 to achieve heat-resistant protection for the sheath layer 1. The wear-resistant buffer skeleton 4 and the sheath layer 1 are clearance-matched, and the wear-resistant buffer skeleton 4 can be slidably mounted on the outside of the sheath layer 1, thereby reducing the difficulty of assembling the entire cable.

[0032] The working principle of the present technical solution is as follows: when the sheath layer 1 is bent for use, the hot-melt liquid storage tape 3 bonded to the surface of the sheath layer 1 bends synchronously with the sheath layer 1, and the wear-resistant buffer skeleton 4 mounted on the outside of the sheath layer 1 bends under the drive of the sheath layer 1 to avoid affecting the laying and use of the sheath layer 1; during the laying process, the end of the support section 42 rubs against the ground or other contact surfaces to prevent the sheath layer 1 and the hot-melt liquid storage tape 3 from being damaged by friction with other objects. At the same time, when the sheath layer 1 is stepped on or squeezed by other equipment, the force applied to the sheath layer 1 is transmitted to the energy absorbing section 41, and the energy absorbing section 41 drives the support section 42 to produce elastic deformation, thereby achieving the effect of buffering energy absorption, and further effectively protecting the surface of the sheath layer 1; when the hot-melt liquid storage tape 3 arranged on the sheath layer 1 is burned by an open flame, the hot-melt liquid storage tape 3 is damaged by heat, and the flame-retardant liquid filled in the hot-melt liquid storage tape 3 leaks out and adheres to the surface of the sheath layer 1, further improving the flame-retardant effect of the sheath layer 1.

[0033] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A halogen-free flame-retardant and fire-resistant cable, characterized in that: The invention comprises a sheath layer (1), wherein the sheath layer (1) is wrapped around the outside of a conductor layer (2), and a spiral hot-melt liquid storage belt (3) and a wear-resistant buffer skeleton (4) are arranged on the outside of the sheath layer (1), the edge of the hot-melt liquid storage belt (3) is bonded to the outside of the sheath layer (1), and a sealed cavity structure for containing a flame-retardant liquid is formed between the hot-melt liquid storage belt (3) and the sheath layer (1), and a plurality of energy-absorbing sections (41) and supporting sections (42) are formed at intervals on the wear-resistant buffer skeleton (4).

2. The halogen-free flame-retardant and fire-resistant cable according to claim 1, characterized in that: The hot-melt liquid storage belt (3) and the wear-resistant buffer skeleton (4) are arranged in parallel.

3. The halogen-free flame-retardant and fire-resistant cable according to claim 1, characterized in that: The energy absorbing section (41) and the supporting section (42) are both elastic arc-shaped plate structures; the inner wall of the energy absorbing section (41) fits the outer surface of the sheath layer (1); and the axis of the supporting section (42) is located outside the hot-melt liquid storage belt (3).

4. The halogen-free flame-retardant and fire-resistant cable according to claim 1, characterized in that: The cavity structure formed between the hot-melt liquid storage belt (3) and the jacket layer (1) is a spiral cavity.

5. The halogen-free flame-retardant and fire-resistant cable according to claim 1, characterized in that: The pitch of the hot-melt liquid storage belt (3) is no greater than 2 cm.

6. The halogen-free flame-retardant and fire-resistant cable according to claim 1, characterized in that: The wear-resistant buffer skeleton (4) and the jacket layer (1) are clearance-matched.

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