Fabricated cable with flame-retardant PVC (polyvinyl chloride) outer protective layer
By introducing multi-layer fire-proof structures into PVC electric pipes, including fire-proof mica belts and glass wire braided layers, the thermal stability and fire-proof problems of PVC electric pipes are solved, and cable safety transmission and personnel escape are achieved in the case of fire.
Patent Information
- Application Number
- CN202510438998.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2025-07-11
AI Technical Summary
The existing PVC electric pipes have poor thermal stability, are prone to aging, and have insufficient heat resistance in fire situations, resulting in the collapse of the circuit system and poor safety.
The prefabricated cable design adopts a multi-layer structure, including conductor insulation layer, moisture-proof layer, first and second flame retardant layers, corrugated pipes and outer protective layers, and uses materials such as fire-resistant mica belts, glass wire braided layers and stainless steel corrugated pipes to improve fire resistance.
It improves the fire resistance of the cable, ensures that the cable can still transmit electricity normally in the event of fire, increases the chance of escape, and improves safety.
Smart Images
Figure CN120299803A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of prefabricated cables. Specifically, it relates to a prefabricated cable with a flame-retardant PVC outer protective layer. Background Art
[0002] The essence of a PVC pipe is a vacuum blow molding pipe, which is applied to many industries such as building materials, chemical industry, coal mine, metallurgy, transportation, home decoration, municipal administration, gas, and power facilities. Among them, the building materials industry accounts for the largest proportion, which is 60%. Secondly, there are several other industries with small-scale applications. After a long time of use, chlorine ions will precipitate from the PVC pipe, so it is not suitable for making water supply pipes, and its impact resistance is poor, so it is not suitable for making gas pipelines. However, the PVC pipe has a low price, high hardness, and small thermal expansion and contraction affected by temperature. Therefore, PVC pipes are divided into two types: PVC water supply pipes and drainage pipes, which are used for municipal water supply and drainage, industrial water supply and drainage, civil water supply and drainage, irrigation, vegetation watering, etc. Among them, the PVC insulated electrical pipe, as a type of PVC pipe, is widely used in power line pipes due to its good insulation performance.
[0003] However, the PVC electrical pipes used in power line pipes on the current market have some disadvantages. The structure of traditional PVC electrical pipes is relatively single, and their thermal stability performance is relatively low. After a long time, the precipitation of chlorine ions causes the accelerated aging of the electrical pipes, which is prone to fire. When a fire occurs, the heat resistance of the electrical circuit is poor, causing the circuit system to collapse, and it is impossible to ensure that the cable can still normally transmit electrical energy. When a fire occurs, the chance for the victims to create an escape route is relatively low, and the safety is relatively poor.
[0004] Therefore, a prefabricated cable with a flame-retardant PVC outer protective layer that increases safety is provided. Summary of the Invention
[0005] The content part of the present application is used to introduce the concepts in a brief form, and these concepts will be described in detail in the following specific implementation part. The content part of the present application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.
[0006] To solve the technical problems mentioned in the above background art section, some embodiments of the present application provide an assembled cable with a flame-retardant PVC outer protective layer, including: a conductor and a conductor insulation layer; the conductor insulation layer is coated on the conductor; a moisture-proof layer, coated on the conductor insulation layer; a first flame-retardant layer, coated on the moisture-proof layer; a second flame-retardant layer, coated on the first flame-retardant layer; a corrugated pipe, coated on the second flame-retardant layer; an outer protective layer, coated on the corrugated pipe; wherein, there are multiple conductor insulation layers; the multiple conductor insulation layers are respectively distributed circumferentially around the moisture-proof layer and are in contact with the inner wall of the moisture-proof layer; the inner sides of the multiple conductor insulation layers are in contact with each other, and the outer sides are in contact with the moisture-proof layer; there are multiple conductors corresponding to the conductor insulation layers.
[0007] Further, the conductor insulation layer is insulating PVC plastic.
[0008] Further, the moisture-proof layer is moisture-proof aluminum foil tape.
[0009] Further, the first flame-retardant layer is fireproof mica tape.
[0010] Further, the second flame-retardant layer is a glass fiber braided layer.
[0011] Further, the corrugated pipe is a metal corrugated pipe.
[0012] Further, the corrugated pipe is a stainless steel corrugated pipe.
[0013] Further, the outer protective layer is a PVC protective layer.
[0014] The beneficial effect of the present application is: to provide an assembled cable with a flame-retardant PVC outer protective layer that increases safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings forming a part of this application are used to provide a further understanding of the present application, making other features, objects, and advantages of the present application more obvious. The schematic embodiments and descriptions of the drawings of the present application are used to explain the present application and do not constitute an improper limitation of the present application.
[0016] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the elements and elements are not necessarily drawn to scale.
[0017] In the drawings:
[0018] Figure 1 is a schematic structural diagram according to an embodiment of the present application, mainly showing the structures of the first flame-retardant layer and the second flame-retardant layer.
[0019] Reference numerals:
[0020] 100. Prefabricated cable with flame-retardant PVC outer protective layer; 101. Conductor; 102. Conductor insulation layer; 103. Moisture-proof layer; 104. First flame-retardant layer; 105. Second flame-retardant layer; 106. Bellows; 107. Outer protective layer. Detailed implementation mode
[0021] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.
[0022] In addition, it should be noted that for the sake of convenience of description, only parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.
[0023] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependent relationships.
[0024] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless clearly specified otherwise in the context, it should be understood as "one or more".
[0025] The present disclosure will be described in detail below with reference to the drawings and in combination with embodiments.
[0026] Refer to Figure 1 , a prefabricated cable 100 with a flame-retardant PVC outer protective layer, comprising: a conductor 101, a conductor insulation layer 102, a moisture-proof layer 103, a first flame-retardant layer 104, a second flame-retardant layer 105, a bellows 106 and an outer protective layer 107. The inside is the conductor 101, the conductor 101 is coated with a conductor 101 insulation layer, and outside the conductor 101 and the conductor insulation layer 102, the outer protective layer 107, the bellows 106, the second flame-retardant layer 105, the first flame-retardant layer 104 and the moisture-proof layer 103 are arranged in sequence from outside to inside.
[0027] The conductor insulation layer 102 is coated on the conductor 101. The insulation layer of the conductor 101 is insulating PVC plastic. The moisture-proof layer 103 is coated on the conductor insulation layer 102. The moisture-proof layer 103 is a moisture-proof aluminum foil tape. The first flame-retardant layer 104 is coated on the moisture-proof layer 103. The first flame-retardant layer 104 is a fire-proof mica tape. The second flame-retardant layer 105 is coated on the first flame-retardant layer 104. The second flame-retardant layer 105 is a glass fiber braided layer. The corrugated pipe 106 is coated on the second flame-retardant layer 105. The corrugated pipe 106 is a stainless steel corrugated pipe 106. The outer protective layer 107 is coated on the corrugated pipe 106. The outer protective layer 107 is a PVC protective layer.
[0028] Among them, there are multiple conductor insulation layers. The multiple conductor insulation layers are respectively distributed circumferentially around the moisture-proof layer 103 and are in contact with the inner wall of the moisture-proof layer 103. The inner sides of the multiple conductor insulation layers 102 are in contact with each other, and the outer sides are in contact with the moisture-proof layer 103. There are multiple conductors 101 corresponding to the conductor insulation layer 102.
[0029] When the PVC protective layer structure is damaged, the stainless steel corrugated pipe 106 can effectively protect the power transmission line (conductor 101) inside the pipe, and better protection effects can be obtained; in case of a fire, once the PVC protective layer is mechanically damaged, the internal metal corrugated pipe 106 can effectively protect the power line from being damaged by the flame, further improving the protection performance of the electrical conduit. Compared with the traditional PVC electrical pipe, it truly plays a good role in fire prevention and increases the safety performance of the cable.
[0030] The first flame-retardant layer 104 is a fire-proof mica tape. The fire-proof mica tape is a refractory insulating material made with mica as the core material through special processes. Fire resistance: It can withstand high temperatures of 500 - 1000 °C, does not burn under fire, and does not release toxic gases. It has good flexibility and can be wound or adhered to complex surfaces.
[0031] The second flame-retardant layer 105 is a glass fiber braided layer. The glass fiber braided layer is made of glass fibers. Its core material is an inorganic non-metallic material. Through processes such as high-temperature melting and wire drawing, extremely fine glass fiber filaments are formed, and then through a braiding process, a flexible braided layer is made. High temperature resistance: It can withstand high temperatures above 300 °C. It has excellent electrical insulation performance, characteristics of being resistant to acids and alkalis, oxidation, and high tensile strength. The moisture-proof layer 103 is a moisture-proof aluminum foil tape, which has the characteristics of moisture-proof, sealing, and heat insulation. It can better protect the cable from moisture.
[0032] By setting the first flame-retardant layer 104 and the second flame-retardant layer 105, the occurrence of fire accidents caused by electrical circuits can be effectively prevented. Once a fire occurs, through the high-temperature resistance characteristics of the first flame-retardant layer 104 and the second flame-retardant layer 105, it is ensured that the cable can still normally transmit electrical energy, and it creates an opportunity for the victims in the fire to escape, thus increasing the safety of the victims.
[0033] The above description is only some preferred embodiments of the present disclosure and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the embodiments of the present disclosure that have similar functions.
Claims
1. An assembled cable with a flame-retardant PVC outer protective layer, comprising: A conductor and a conductor insulation layer; The conductor insulation layer is coated on the conductor; It is characterized in that: The assembled cable with a flame-retardant PVC outer protective layer further comprises: A moisture-proof layer, coated on the conductor insulation layer; A first flame-retardant layer, coated on the moisture-proof layer; A second flame-retardant layer, coated on the first flame-retardant layer; A corrugated pipe, coated on the second flame-retardant layer; An outer protective layer, coated on the corrugated pipe; Wherein, a plurality of the conductor insulation layers are provided; the plurality of conductor insulation layers are respectively distributed circumferentially around the moisture-proof layer and are in contact with the inner wall of the moisture-proof layer; the inner sides of the plurality of conductor insulation layers are in contact with each other, and the outer sides are in contact with the moisture-proof layer; a plurality of conductors are provided corresponding to the conductor insulation layers.
2. The assembled cable with a flame-retardant PVC outer protective layer according to claim 1, characterized in that: The conductor insulation layer is insulating PVC plastic.
3. The assembled cable with a flame-retardant PVC outer protective layer according to claim 1, characterized in that: The moisture-proof layer is a moisture-proof aluminum foil tape.
4. The assembled cable with a flame-retardant PVC outer protective layer according to claim 1, characterized in that: The first flame-retardant layer is a fireproof mica tape.
5. The assembled cable with a flame-retardant PVC outer protective layer according to claim 1, characterized in that: The second flame-retardant layer is a glass fiber braided layer.
6. The assembled cable with a flame-retardant PVC outer protective layer according to claim 1, characterized in that: The corrugated pipe is a metal corrugated pipe.
7. The assembled cable with a flame-retardant PVC outer protective layer according to claim 6, characterized in that: The corrugated pipe is a stainless steel corrugated pipe.
8. The assembled cable with a flame-retardant PVC outer protective layer according to claim 1, characterized in that: The outer protective layer is a PVC protective layer.