Waterproof high-flame-retardant cable

Abstract

The utility model discloses a waterproof high-flame-retardant cable, which comprises a cable core, a wrapping tape layer, a waterproof layer and a sheath layer which are sequentially arranged from inside to outside, the wrapping tape layer is formed by wrapping a ceramic silicone rubber tape on the cable core; the waterproof layer is a water-blocking tape which is wrapped on the wrapping tape layer. The waterproof high-flame-retardant cable provided by the utility model is good in waterproofness, better in flame-retardant effect and lower in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a waterproof and highly flame-retardant cable. Background Art

[0002] In the design of power engineering, for fire safety considerations, especially in crowded places and places requiring special protection, cables with higher waterproof and flame retardant properties are often selected, which can more effectively prevent the occurrence of fire safety accidents.

[0003] At present, the waterproof and flame-retardant cables used in the industry cannot take into account both the flame retardancy and waterproofness of the cables. On the one hand, if the waterproof design of the cable is improper, it is easy to cause moisture absorption inside the cable, thereby reducing the insulation effect and being easily punctured, causing dangerous accidents. On the other hand, the flame retardant performance of the current cable design needs to be further improved. Utility Model Content

[0004] The present application provides a waterproof and highly flame-retardant cable that can be more effectively waterproof and flame-retardant, thereby preventing the occurrence of fire safety accidents such as fire.

[0005] The present application provides a waterproof and highly flame-retardant cable, comprising a cable core, a wrapping tape layer, a waterproof layer and a sheath layer arranged in sequence from the inside to the outside; the wrapping tape layer is a ceramic silicone rubber tape wrapped around the cable core; the waterproof layer is a water-blocking tape wrapped around the wrapping tape layer.

[0006] Furthermore, the wrapping overlap rate of the ceramicized silicone rubber belt is not less than 30%.

[0007] Furthermore, the wrapping overlap rate of the water-blocking tape is not less than 20%.

[0008] Furthermore, the sheath layer is a halogen-free, low-smoke, flame-retardant polyolefin sheath material extruded onto the waterproof layer.

[0009] Furthermore, there are multiple insulating cores, each of which includes a conductor, a fire-resistant layer and an insulating layer arranged in sequence from the inside to the outside; the gap between each insulating core and between the cable core and the wrapping tape layer is filled with a low-smoke halogen-free flame-retardant polypropylene filling rope.

[0010] Furthermore, the fire-resistant layer is a double-sided synthetic mica tape wrapped around the conductor.

[0011] Furthermore, the wrapping overlap rate of the double-sided synthetic mica tape is not less than 30%, and the thickness of the double-sided synthetic mica tape is not less than 0.15 mm.

[0012] Furthermore, the number of wrapped layers of the double-sided synthetic mica tape is not less than 2.

[0013] Furthermore, the insulating layer is a silane cross-linked low-smoke halogen-free flame-retardant polyolefin insulating material.

[0014] Compared with the prior art, the waterproof and highly flame-retardant cable provided by the utility model has a fire-resistant layer formed by wrapping double-sided synthetic mica tape. Since the double-sided synthetic mica tape has high fire resistance, the waterproof and highly flame-retardant cable of the utility model has better flame retardancy and its use cost is low. The waterproof and highly flame-retardant cable provided by the utility model is also filled with low-smoke halogen-free flame-retardant polypropylene filling rope. At the same time, the sheath layer adopts halogen-free low-smoke flame-retardant polyolefin sheath material, which makes the waterproof and highly flame-retardant cable provided by the utility model have better fire-resistant ability. On the other hand, the waterproof and highly flame-retardant cable provided by the utility model is provided with a waterproof layer composed of a water-blocking tape, so that the inside of the cable is not easy to absorb moisture and cause the insulation to be reduced, thereby avoiding the occurrence of fire safety accidents.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1 It is a cross-sectional schematic diagram of the waterproof and highly flame-retardant cable of the present application;

[0018] In the figure:

[0019] 11- conductor, 12- fire-resistant layer, 13- insulation layer, 14- low-smoke halogen-free flame-retardant polypropylene filling rope;

[0020] 20- wrapping tape layer;

[0021] 30- waterproof layer;

[0022] 40-Sheath layer. DETAILED DESCRIPTION

[0023] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this specification. Instead, they are merely examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

[0024] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this specification should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in this specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate the existence of one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0025] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms of "a", "an", "the" and "the" used in this specification and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0026] Next, the embodiments of this specification are described in detail.

[0027] Please refer to Figure 1 As shown, Figure 1 It is a cross-sectional schematic diagram of the waterproof and highly flame-retardant cable of the present application.

[0028] As shown in the figure, in order to improve the flame retardancy and waterproofness of the cable, the present application provides a waterproof and highly flame retardant cable, which mainly includes a cable core, a wrapping tape layer 20, a waterproof layer 30 and a sheath layer 40 arranged in sequence from the inside to the outside.

[0029] Specifically, the wrapping tape layer 20 is a ceramic silicone rubber tape wrapped around the cable core. It is understandable that the ceramic silicone rubber tape is made of ceramic silicone rubber, which is a new type of polymer refractory material with excellent fireproof, flame retardant, low smoke, non-toxic and other properties. The extrusion molding process is simple, and the residue after combustion is a hard ceramic shell, which does not melt or drip in a fire environment. The waterproof and highly flame-retardant cable of the present application uses a ceramic silicone rubber tape wrapped around the cable core as the wrapping tape layer 20, which improves the flame retardancy and fire resistance of the cable. Even in the event of a fire, it can provide a solid protective effect on the inside of the cable and ensure smooth power transmission. At the same time, the use of ceramic silicone rubber tape can reduce production energy consumption and save costs.

[0030] Preferably, the wrapping coverage of the ceramic silicone rubber tape is not less than 30%, so that the wrapping tape layer 20 has good fire retardancy. It can be understood that the wrapping coverage refers to the proportion of the ceramic silicone rubber tape wrapped around the cable core to cover the cable core.

[0031] Specifically, the waterproof layer 30 is a water-blocking tape wrapped on the wrapping tape layer 20. It can be understood that the water-blocking tape refers to the water-blocking tape for cables and optical cables. The water-blocking tape is made of polyester non-woven fabrics, conductive carbon black and polymer water-absorbing resin as the main materials. The water-blocking tape has the characteristics of high expansion pressure, fast expansion speed, good gel stability and good thermal stability, which prevents water and moisture from spreading longitudinally, thereby playing a water-blocking role, ensuring the power transmission performance and extending the life of the cable. The waterproof and highly flame-retardant cable of the present application uses a water-blocking tape wrapped on the wrapping tape layer 20 as the waterproof layer 30, which can effectively play the role of sealing, waterproofing, moisture-proofing and buffering protection, ensuring the power transmission performance while also extending the life of the cable.

[0032] Preferably, the overlapping rate of the water-blocking tape is not less than 20%, so that the waterproof layer 30 has better sealing and waterproof performance.

[0033] In one embodiment, the sheath layer 40 is a halogen-free, low-smoke, flame-retardant polyolefin sheath material extruded on the waterproof layer 30. It can be understood that the halogen-free, low-smoke, flame-retardant polyolefin sheath material is based on polyolefin, contains special halogen-free flame retardants and smoke suppressants, and is precisely mixed and processed with a special formula. It has excellent flame retardancy, and when burned, no halogen acid gas is released, the amount of toxic and corrosive gas released is very small, and the smoke concentration generated is extremely low. The present application uses a halogen-free, low-smoke, flame-retardant polyolefin sheath material extruded on the waterproof layer 30 as the sheath layer 40, which has good flame retardancy and is safer.

[0034] In one embodiment, the cable core includes multiple insulating cores, each insulating core includes a conductor 11, a fire-resistant layer 12 and an insulating layer 13 arranged in sequence from the inside to the outside; the gap between each insulating core and between the cable core and the wrapping tape layer 20 is filled with a low-smoke halogen-free flame-retardant polypropylene filling rope 14.

[0035] It can be understood that the low-smoke halogen-free flame-retardant polypropylene filling rope 14 is a high-strength mesh low-smoke halogen-free flame-retardant polypropylene filling rope made of drawing-grade polypropylene raw materials, added with low-smoke halogen-free environmentally friendly flame retardants, and processed by special equipment for film pressing and meshing. It has good flame retardant properties, low smoke density, halogen-free, asbestos-free, environmentally friendly, soft and extremely strong tension. The waterproof and highly flame-retardant cable of the present application uses low-smoke halogen-free flame-retardant polypropylene filling rope 14 to fill the gap between each insulating core and the gap between the cable core and the wrapping tape layer 20, so that the cable has better flame retardancy and is safer and more environmentally friendly.

[0036] In a preferred embodiment, the fire-resistant layer 12 is a double-sided synthetic mica tape wrapped around the conductor 11. It is understandable that the double-sided synthetic mica tape is made of mica paper made from synthetic mica as the main material, and glass fiber cloth is pasted on both sides of the mica paper with an adhesive. In addition to the characteristics of natural mica tape such as small expansion coefficient, high dielectric strength, and high resistivity, the main characteristics of the double-sided synthetic mica tape are high heat resistance, strong insulation and fire resistance. The waterproof and highly flame-retardant cable of the present application uses a double-sided synthetic mica tape wrapped around the conductor 11 as the fire-resistant layer 12, which improves the flame retardancy and insulation performance of the cable.

[0037] Preferably, the wrapping overlap rate of the double-sided synthetic mica tape is not less than 30%, and the thickness of the double-sided synthetic mica tape is not less than 0.15 mm, so that the fire-resistant layer 12 has better flame retardancy and insulation.

[0038] More preferably, the number of wrapped layers of the double-sided synthetic mica tape is not less than 2, so that the fire-resistant layer 12 has better flame retardancy and insulation.

[0039] In one embodiment, the insulating layer 13 is a silane cross-linked low-smoke halogen-free flame-retardant polyolefin insulating material. It can be understood that the silane cross-linked low-smoke halogen-free flame-retardant polyolefin insulating material is an organic combination of silane cross-linking technology and halogen-free flame-retardant technology, and has excellent electrical properties, anti-aging properties, insulation properties and flame retardant properties. The waterproof and highly flame-retardant cable of the present application uses silane cross-linked low-smoke halogen-free flame-retardant polyolefin insulating material as the insulating layer 13, so that the cable has better flame retardancy and waterproofness, and is safer and more environmentally friendly.

[0040] In combination with the above embodiments, the utility model arranges a wrapping tape layer 20, a waterproof layer 30 and a sheath layer 40 on a cable core formed by a combination of multiple insulating cores. The wrapping tape layer 20 is made of a ceramic silicone rubber tape wrapped around the cable core, which is resistant to high temperatures, has good insulation and flame retardancy, and is low in cost. It improves the flame retardancy of the cable and ensures smooth power transmission. The sheath layer 40 is made of a halogen-free, low-smoke, flame-retardant polyolefin sheath material extruded on the wrapping tape layer 20, which has good flame retardancy and is safer. The waterproof layer 30 is made of a water-blocking tape wrapped on the wrapping tape layer 20, which can effectively play the role of sealing, waterproofing, moisture-proofing and buffering protection, which ensures the power transmission performance while also extending the life of the cable. The multiple insulated wire cores that form the cable core are composed of a conductor 11, a fire-resistant layer 12, and an insulating layer 13. The fire-resistant layer 12 is made of double-sided synthetic mica tape wrapped around the conductor 11, which has better flame retardancy than ordinary mica and is low in cost. The insulating layer 13 is made of silane cross-linked low-smoke halogen-free flame-retardant polyolefin insulation material, which improves the flame retardancy of the cable. At the same time, it can also ensure good insulation performance and transmission performance of electrical signals, and is also safer and more environmentally friendly. In addition, the gaps between each insulating wire core and between the cable core and the wrapping tape layer 20 are filled with low-smoke halogen-free flame-retardant polypropylene filling ropes 14, which make the cable more resistant to high temperature and corrosion, improve the fire retardant effect of the cable, and make it safer and more environmentally friendly.

[0041] Those skilled in the art will readily appreciate other embodiments of the specification after considering the specification and practicing the invention claimed herein. The specification is intended to cover any variations, uses or adaptations of the specification that follow the general principles of the specification and include common knowledge or customary techniques in the art that are not claimed in the specification. The specification and examples are to be considered exemplary only, and the true scope and spirit of the specification are indicated by the following claims.

[0042] It should be understood that the present description is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.

[0043] The above are only preferred embodiments of this specification and are not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this specification should be included in the scope of protection of this specification.

Claims

1. A waterproof and highly flame-retardant cable, characterized in that: It includes a cable core, a wrapping tape layer, a waterproof layer and a sheath layer which are arranged in sequence from the inside to the outside; The wrapping tape layer is a ceramic silicone rubber tape wrapped around the cable core; The waterproof layer is a water-blocking tape wrapped around the wrapping tape layer.

2. The waterproof and highly flame-retardant cable according to claim 1, characterized in that: The wrapping overlap rate of the ceramicized silicone rubber belt is not less than 30%.

3. The waterproof and highly flame-retardant cable according to claim 1, characterized in that: The wrapping overlap rate of the water blocking tape is not less than 20%.

4. The waterproof and highly flame-retardant cable according to claim 1, characterized in that: The sheath layer is made of halogen-free, low-smoke, flame-retardant polyolefin sheath material extruded onto the waterproof layer.

5. The waterproof and highly flame-retardant cable according to any one of claims 1 to 4, characterized in that: The cable core comprises: A plurality of insulating wire cores, each of which comprises a conductor, a fire-resistant layer and an insulating layer arranged in sequence from the inside to the outside; The gaps between each of the insulating cores and between the cable core and the wrapping tape layer are filled with low-smoke, halogen-free, flame-retardant polypropylene filling ropes.

6. The waterproof and highly flame-retardant cable according to claim 5, characterized in that: The fire-resistant layer is a double-sided synthetic mica tape wrapped around the conductor.

7. The waterproof and highly flame-retardant cable according to claim 6, characterized in that: The wrapping overlap rate of the double-sided synthetic mica tape is not less than 30%, and the thickness of the double-sided synthetic mica tape is not less than 0.15 mm.

8. The waterproof and highly flame-retardant cable according to claim 7, characterized in that: The double-sided synthetic mica tape has no less than 2 wrapping layers.

9. The waterproof and highly flame-retardant cable according to claim 5, characterized in that: The insulating layer is made of silane cross-linked low-smoke halogen-free flame-retardant polyolefin insulating material.

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