CN113764136B - High-temperature-resistant fireproof power cable - Google Patents

Abstract

The application provides a high-temperature-resistant fireproof power cable which comprises a plastic pipeline and metal wires, wherein the metal wires are positioned in the plastic pipeline, the metal wires are provided with a plurality of metal wires, a spacing pipeline is arranged in the plastic pipeline, a plurality of independent channels are arranged in the spacing pipeline, the metal wires are respectively and independently arranged in the channels, gaps are reserved between the outer walls of the metal wires and the inner walls of the channels, fillers are filled in the gaps, the fillers have flame retardance, the fillers have insulativity, the fillers are hard particles, and the maximum diameter of the particles of the fillers is smaller than that of the metal wires. After the plastic pipeline and the interval pipeline are burnt out, the filler in the plastic pipeline and the interval pipeline can prevent heat from being conducted to the metal wire continuously, and the metal guide is wrapped in the plastic pipeline and the interval pipeline, so that the metal guide is prevented from being exposed, and external objects are prevented from being contacted with the metal wire, thereby avoiding electric leakage, electric shock and short circuit.

Description

High-temperature-resistant fireproof power cable

Technical Field

The application relates to the technical field of cables, in particular to a high-temperature-resistant fireproof power cable.

Background

The cable is a cable commonly used for power transmission, and is generally composed of a plastic pipeline and a metal wire, wherein the plastic pipeline is wrapped outside the metal wire to play a role in insulation protection, however, the plastic pipeline is easily burnt out after encountering high temperature to expose the metal wire inside, and electric shock, electric leakage and short circuit are easily caused.

Disclosure of Invention

The application provides a high-temperature-resistant fireproof power cable which is used for solving the problems that in the prior art, after a cable encounters high temperature, a plastic pipeline of the cable is easy to burn out, so that an internal metal pipeline is exposed, and finally electric shock, electric leakage and short circuit are caused.

In order to achieve the above purpose, the embodiments of the present application provide the following technical solutions:

the utility model provides a high temperature resistant fire prevention power cable, includes plastic pipeline and metal wire, the metal wire is located inside the plastic pipeline, the metal wire has many, inside interval pipeline that is equipped with of plastic pipeline, interval pipeline inside is equipped with a plurality of independent passageway, the metal wire is independent respectively set up in each inside the passageway, the outer wall of metal wire with have the clearance between the inner wall of passageway, the clearance intussuseption is filled with the filler, the filler has fire resistance, the filler has the insulating property, the filler is the stereoplasm graininess, the maximum diameter of the granule of filler is less than the diameter of metal wire.

In some embodiments, the filler is quartz sand.

In some embodiments, the channels include a first channel, a second channel, a third channel, and a fourth channel, the first channel, the second channel, the third channel, and the fourth channel being independently disposed;

the metal wire comprises a live wire, a zero wire, a ground wire and a tensile wire, wherein the live wire is positioned in the first channel, the zero wire is positioned in the second channel, the ground wire is positioned in the third channel, and the tensile wire is positioned in the fourth channel;

the gap comprises a first gap, a second gap, a third gap and a fourth gap, wherein the first gap is positioned between the live wire outer wall and the first channel inner wall, the second gap is positioned between the zero wire outer wall and the second channel inner wall, and the third gap is positioned between the ground wire outer wall and the fourth channel inner wall;

the central axis of the live wire coincides with the central axis of the first channel, the central axis of the zero wire coincides with the central axis of the second channel, the central axis of the ground wire coincides with the central axis of the third channel, and the central axis of the tensile wire coincides with the central axis of the fourth channel.

In some embodiments, the central axis of the spacer line coincides with the central axis of the plastic line, the first channel, the second channel, the third channel and the fourth channel are arranged in parallel, and the first channel, the second channel, the third channel and the fourth channel are spirally arranged around the central axis of the plastic pipe.

In some embodiments, the first steel wire mesh is fixedly connected to the inner wall of the first channel, the second steel wire mesh is fixedly connected to the inner wall of the second channel, the third steel wire mesh is fixedly connected to the inner wall of the third channel, and the fourth steel wire mesh is fixedly connected to the inner wall of the fourth channel.

In some embodiments, a first protection layer is wrapped on the outer wall of the live wire, the first protection layer has elasticity, a second protection layer is wrapped on the outer wall of the zero line, the second protection layer has elasticity, a third protection layer is wrapped on the outer wall of the ground wire, the third protection layer has elasticity, a fourth protection layer is wrapped on the outer wall of the tensile wire, and the fourth protection layer has elasticity;

the first gap is located between the first protective layer and the first steel wire mesh, the second gap is located between the second protective layer and the second steel wire mesh, the third gap is located between the third protective layer and the third steel wire mesh, and the third gap is located between the fourth protective layer and the fourth steel wire mesh.

In some embodiments, the live wire, the neutral wire and the ground wire are made of copper materials, and the tensile wire is formed by braiding a plurality of steel wires in a bundle.

In some embodiments, the spacer lines are made of a rubber material, and the spacer lines are elastic.

In some embodiments, the spacer pipeline comprises a wrapping pipeline, a plurality of radial interlayers and a central interlayer, the central axis of the wrapping pipeline coincides with the central axis of the plastic pipeline, the cross section of the central interlayer is circular, the central axis of the central interlayer coincides with the central axis of the wrapping pipeline, the radial interlayer is positioned between the central interlayer and the wrapping interlayer, the radial interlayer is sheet-shaped, the cross section of the radial interlayer is arranged along the radial direction of the wrapping pipeline, one side, away from the center of the wrapping pipeline, of the radial interlayer is fixedly connected with the inner wall of the wrapping pipeline, one side, close to the center of the wrapping pipeline, of the radial pipeline is fixedly connected with the outer wall of the central interlayer, and the first channel, the second channel, the third channel and the fourth channel are respectively formed by surrounding the radial interlayer, the central interlayer and the spacer pipeline.

In some embodiments, an outer ring fillet is arranged at the intersection of the radial interlayer and the inner wall of the spacing pipeline, and an inner ring fillet is arranged at the intersection of the radial interlayer and the outer wall of the central interlayer;

and/or a powder layer is arranged between the outer wall of the interval pipeline and the inner wall of the plastic pipeline, lime powder is adopted as the powder, and the thickness of the powder layer is between 0.2mm and 0.5 mm.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a high temperature resistant, fire resistant power cable in an embodiment of the application;

FIG. 2 is a schematic diagram of the structure of an intermediate partition line in an embodiment of the present application;

fig. 3 is a schematic diagram of a configuration of a gap in an embodiment of the present application.

Reference numerals:

101. a plastic pipeline; 102. a spacer pipeline; 103. a filler; 104. a first channel; 105. a second channel;

106. a third channel; 107. a fourth channel; 108. a firing line; 109. a zero line; 110. a ground wire; 111. a pull-resistant wire;

112. a first gap; 113. a second gap; 114. a third gap; 115. a fourth gap; 116. a first steel wire mesh;

117. a second steel wire mesh; 118. a third steel wire mesh; 119. a fourth steel wire mesh; 120. a first protective layer; 121. a second protective layer; 122. a third protective layer; 123. a fourth protective layer; 124. wrapping the pipeline; 125. a radial spacer layer; 126. a central spacer layer; 127. round corners of the outer ring; 128. inner ring fillets; 129. a powder layer.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the application but are not intended to limit the scope of the application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present application will be understood in detail by those of ordinary skill in the art.

In embodiments of the application, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

As shown in fig. 1, 2 and 3, in an embodiment of the present application, there is provided a high temperature resistant and fireproof power cable, including a plastic pipeline 101 and a metal wire, the metal wire is located inside the plastic pipeline 101, the metal wire has a plurality of wires, a spacer pipeline 102 is provided inside the plastic pipeline 101, a plurality of independent channels are provided inside the spacer pipeline 102, the metal wire is respectively and independently provided inside each channel, a gap is provided between an outer wall of the metal wire and an inner wall of the channel, a filler 103 is filled in the gap, the filler 103 has flame retardance, the filler 103 has insulation, the filler 103 is in a hard particle shape, and a maximum diameter of particles of the filler 103 is smaller than a diameter of the metal wire.

When the high-temperature-resistant fireproof power cable provided by the embodiment is in a high-temperature environment, for example, in an open fire, the plastic pipeline 101 is burnt and melted or broken first, the spacing pipeline 102 is used as a second defense line of the metal wire, the high-temperature-resistant time can be prolonged, after the spacing pipeline 102 is burnt, the internal filler 103 can block heat to be conducted to the metal wire continuously, the metal guide is wrapped inside, the metal guide is prevented from being exposed, and the contact of an external object and the metal wire is avoided, so that electric leakage, electric shock and short circuit are avoided.

In some embodiments, the filler 103 is quartz sand.

Through the embodiment, the quartz sand is a natural material, has low cost, good flame retardance and good insulativity, and after the temperature reaches the melting point of the quartz sand, the quartz sand is melted to form glass in a fluid state, and is wrapped on the outer wall of the metal conducting wire after solidification to insulate and insulate the metal conducting wire and support and fix the metal conducting wire.

In some embodiments, the channels include a first channel 104, a second channel 105, a third channel 106, and a fourth channel 107, the first channel 104, the second channel 105, the third channel 106, and the fourth channel 107 being independently disposed; the metal wire comprises a live wire 108, a zero wire 109, a ground wire 110 and a tensile wire 111, wherein the live wire 108 is positioned in the first channel 104, the zero wire 109 is positioned in the second channel 105, the ground wire 110 is positioned in the third channel 106, and the tensile wire 111 is positioned in the fourth channel 107; the gaps comprise a first gap 112, a second gap 113, a third gap 114 and a fourth gap 115, the first gap 112 is positioned between the outer wall of the live wire 108 and the inner wall of the first channel 104, the second gap 113 is positioned between the outer wall of the neutral wire 109 and the inner wall of the second channel 105, and the third gap 114 is positioned between the outer wall of the ground wire 110 and the inner wall of the fourth channel 107; the central axis of the live wire 108 coincides with the central axis of the first channel 104, the central axis of the neutral wire 109 coincides with the central axis of the second channel 105, the central axis of the ground wire 110 coincides with the central axis of the third channel 106, and the central axis of the tensile wire 111 coincides with the central axis of the fourth channel 107.

Through the above embodiment, the metal wires (the live wire 108, the neutral wire 109, the ground wire 110 and the tensile wire 111) are respectively and independently separated in the first channel 104, the second channel 105, the third channel 106 and the fourth channel 107, and the spacing pipeline 102 separates the metal wires and supports and positions the metal wires so that the space and the relative position relationship between the metal wires are kept fixed.

In some embodiments, the central axis of the spacer line 102 coincides with the central axis of the plastic line 101, and the first channel 104, the second channel 105, the third channel 106 and the fourth channel 107 are arranged in parallel, and the first channel 104, the second channel 105, the third channel 106 and the fourth channel 107 are arranged helically around the central axis of the plastic tube.

Through above-mentioned embodiment, the spiral setting can improve the holistic pliability and the tensile strength of high temperature resistant fire prevention power cable.

In some embodiments, the inner wall of the first channel 104 is fixedly connected with a first steel wire mesh 116, the inner wall of the second channel 105 is fixedly connected with a second steel wire mesh 117, the inner wall of the third channel 106 is fixedly connected with a third steel wire mesh 118, and the inner wall of the fourth channel 107 is fixedly connected with a fourth steel wire mesh 119.

Through the above embodiment, after the spacer pipeline 102 is burnt, the first steel wire mesh 116, the second steel wire mesh 117, the third steel wire mesh 118 and the fourth steel wire mesh 119 can wrap the filler 103 (quartz sand) in the corresponding gaps respectively, the particle diameter of the quartz sand is smaller than the mesh width of each steel wire mesh (the first steel wire mesh 116, the second steel wire mesh 117, the third steel wire mesh 118 and the fourth steel wire mesh 119), the filler 103 is prevented from being scattered, each metal wire can be stably embedded in the filler 103, and the metal wires are prevented from being exposed. Each steel wire mesh can also carry out electromagnetic shielding to the inside wire, reduces the interference of outside electromagnetism to wire power transmission, reduces the influence of electromagnetism that the wire circular telegram in-process produced to external environment.

In some embodiments, the outer wall of the live wire 108 is wrapped with a first protective layer 120, the first protective layer 120 has elasticity, the outer wall of the neutral wire 109 is wrapped with a second protective layer 121, the second protective layer 121 has elasticity, the outer wall of the ground wire 110 is wrapped with a third protective layer 122, the third protective layer 122 has elasticity, the outer wall of the tensile wire 111 is wrapped with a fourth protective layer 123, and the fourth protective layer 123 has elasticity; the first gap 112 is located between the first protective layer 120 and the first wire mesh 116, the second gap 113 is located between the second protective layer 121 and the second wire mesh 117, the third gap 114 is located between the third protective layer 122 and the third wire mesh 118, and the third gap 114 is located between the fourth protective layer 123 and the fourth wire mesh 119.

Through the above embodiment, the first protective layer 120, the second protective layer 121, the third protective layer 122, and the fourth protective layer 123 can respectively protect the live wire 108, the neutral wire 109, the ground wire 110, and the tensile wire 111, and prevent the surfaces of the live wire 108, the neutral wire 109, the ground wire 110, and the tensile wire 111 from being scratched by quartz sand.

In some embodiments, the live wire 108, neutral wire 109, and ground wire 110 are made of copper material, and the tensile wire 111 is formed by braiding a plurality of steel wires.

With the above embodiment, the tensile wire 111 is used to enhance the tensile strength of the entire high temperature resistant fireproof power cable.

In some embodiments, spacer tube 102 is made of a rubber material, and spacer tube 102 is resilient.

By the above embodiment, the spacer line 102 is made of an elastic rubber material, so that the quartz sand can be pressed together and scratch by the quartz sand can be avoided.

In some embodiments, the spacer tube 102 includes a wrapping tube 124, a plurality of radial spacers 125, and a central spacer layer 126, where the central axis of the wrapping tube 124 coincides with the central axis of the plastic tube 101, the cross section of the central spacer layer 126 is circular, the central axis of the central spacer layer 126 coincides with the central axis of the wrapping tube 124, the radial spacer layer 125 is located between the central spacer layer 126 and the wrapping spacer layer, the radial spacer layer 125 is in a sheet shape, the cross section of the radial spacer layer 125 is disposed along the radial direction of the wrapping tube 124, one side of the radial spacer layer 125 away from the center of the wrapping tube 124 is fixedly connected with the inner wall of the wrapping tube 124, one side of the radial tube near the center of the wrapping tube 124 is fixedly connected with the outer wall of the central spacer layer 126, and the first channel 104, the second channel 105, the third channel 106, and the fourth channel 107 are respectively surrounded by the radial spacer layer 125, the central spacer layer 126, and the spacer tube 102.

In some embodiments, the radial barrier 125 intersects the inner wall of the spacer tube 102 with an outer radius 127 and the radial barrier 125 intersects the outer wall of the central barrier 126 with an inner radius 128;

and/or a powder layer 129 is arranged between the outer wall of the spacing pipeline 102 and the inner wall of the plastic pipeline 101, wherein lime powder is adopted as the powder, and the thickness of the powder layer 129 is between 0.2mm and 0.5 mm.

Through the above embodiment, the powder layer 129 can form a sliding layer between the outer wall of the spacing pipeline 102 and the inner wall of the plastic pipeline 101, so as to reduce friction generated between the plastic pipeline 101 and the conveying pipeline in the bending process.

The above examples are intended to be illustrative of the application and not limiting, and those skilled in the art, after reading the present specification, may make modifications to the embodiments of the application as necessary without inventive contribution, but are protected by the patent laws within the scope of the appended claims.

Claims (5)

1. The utility model provides a high temperature resistant fire prevention power cable, includes plastic pipeline and metal wire, the metal wire is located inside the plastic pipeline, its characterized in that, the metal wire has many, the inside interval pipeline that is equipped with of plastic pipeline, the inside a plurality of independent passageway that is equipped with of interval pipeline, the metal wire respectively independent setting is in each inside the passageway, there is the clearance between the outer wall of metal wire and the inner wall of passageway, the intussuseption of clearance is filled with the filler, the filler has flame retardant property, the filler has insulativity, the filler is stereoplasm graininess, the maximum diameter of the granule of filler is less than the diameter of metal wire;

the filler is quartz sand;

the channels comprise a first channel, a second channel, a third channel and a fourth channel, and the first channel, the second channel, the third channel and the fourth channel are respectively and independently arranged;

the central axis of the spacer pipeline coincides with the central axis of the plastic pipeline, the first channel, the second channel, the third channel and the fourth channel are arranged in parallel, and the first channel, the second channel, the third channel and the fourth channel are spirally arranged around the central axis of the plastic pipe;

the inner wall of the first channel is fixedly connected with a first steel wire mesh, the inner wall of the second channel is fixedly connected with a second steel wire mesh, the inner wall of the third channel is fixedly connected with a third steel wire mesh, and the inner wall of the fourth channel is fixedly connected with a fourth steel wire mesh;

the spacer lines are made of rubber material and have elasticity;

the interval pipeline comprises a wrapping pipeline, a plurality of radial interlayers and a central interlayer, wherein the central axis of the wrapping pipeline coincides with the central axis of the plastic pipeline, the cross section of the central interlayer is circular, the central axis of the central interlayer coincides with the central axis of the wrapping pipeline, the radial interlayers are positioned between the central interlayer and the wrapping pipeline, the radial interlayers are sheet-shaped, the cross section of the radial interlayers is arranged along the radial direction of the wrapping pipeline, one side of the radial interlayers, which is far away from the center of the wrapping pipeline, is fixedly connected with the inner wall of the wrapping pipeline, one side of the radial pipeline, which is close to the center of the wrapping pipeline, is fixedly connected with the outer wall of the central interlayer, and the first channel, the second channel, the third channel and the fourth channel are respectively formed by surrounding the radial interlayers, the central interlayer and the interval pipeline.

2. The high temperature resistant, fire resistant power cable according to claim 1, wherein the metallic conductors comprise a live wire, a neutral wire, a ground wire and a tensile wire, the live wire being located inside the first channel, the neutral wire being located inside the second channel, the ground wire being located inside the third channel, the tensile wire being located inside the fourth channel;

the gap comprises a first gap, a second gap, a third gap and a fourth gap, wherein the first gap is positioned between the live wire outer wall and the first channel inner wall, the second gap is positioned between the zero wire outer wall and the second channel inner wall, and the third gap is positioned between the ground wire outer wall and the fourth channel inner wall;

the central axis of the live wire coincides with the central axis of the first channel, the central axis of the zero wire coincides with the central axis of the second channel, the central axis of the ground wire coincides with the central axis of the third channel, and the central axis of the tensile wire coincides with the central axis of the fourth channel.

3. The high-temperature-resistant fireproof power cable according to claim 2, wherein a first protective layer is wrapped on the outer wall of the live wire, the first protective layer has elasticity, a second protective layer is wrapped on the outer wall of the zero line, the second protective layer has elasticity, a third protective layer is wrapped on the outer wall of the ground wire, the third protective layer has elasticity, a fourth protective layer is wrapped on the outer wall of the tensile wire, and the fourth protective layer has elasticity;

the first gap is located between the first protective layer and the first steel wire mesh, the second gap is located between the second protective layer and the second steel wire mesh, the third gap is located between the third protective layer and the third steel wire mesh, and the third gap is located between the fourth protective layer and the fourth steel wire mesh.

4. A high temperature resistant and fire resistant power cable according to claim 3, wherein the live wire, the neutral wire and the ground wire are made of copper material, and the tensile wire is formed by braiding a plurality of steel wires in bundles.

5. The high temperature resistant and fireproof power cable according to claim 4, wherein an outer ring fillet is arranged at the intersection of the radial interlayer and the inner wall of the spacing pipeline, and an inner ring fillet is arranged at the intersection of the radial interlayer and the outer wall of the central interlayer;

and/or a powder layer is arranged between the outer wall of the interval pipeline and the inner wall of the plastic pipeline, lime powder is adopted as the powder, and the thickness of the powder layer is between 0.2mm and 0.5 mm.