CN223638153U - Medium-voltage environment-friendly flame-retardant water-blocking cable - Google Patents
Medium-voltage environment-friendly flame-retardant water-blocking cableInfo
- Publication number
- CN223638153U CN223638153U CN202422922981.7U CN202422922981U CN223638153U CN 223638153 U CN223638153 U CN 223638153U CN 202422922981 U CN202422922981 U CN 202422922981U CN 223638153 U CN223638153 U CN 223638153U
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- layer
- water
- blocking
- retardant
- flame
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The utility model discloses a medium-voltage environment-friendly flame-retardant water-blocking cable which comprises a wire and a protective jacket wrapping the wire, wherein the protective jacket is of a multi-layer structure, and comprises a water-blocking tape wrapping protective layer, a metal water-blocking layer, a second glass fiber cloth wrapping layer, a spacer sleeve, a steel belt layer, a first glass fiber cloth wrapping layer and an outer sheath from inside to outside. Wherein, the steel tape layer is interlocking armor, and double-deck steel band forms interlocking structure through self radian barb. The protective jacket with the multilayer structure is used for coating the wires to form a protective effect on the wires, and the double-layer steel belt is used for forming interlocking armor with an interlocking structure through the radian barbs of the double-layer steel belt, so that flame moisture can be prevented from invading to damage the internal structure, the flame-retardant and water-blocking function is realized, and the overall flame-retardant and water-blocking performance of the cable can be greatly improved. In addition, the selected materials are halogen-free low-smoke materials, and no toxic or harmful gas is generated during combustion, so that the environment-friendly material is fully friendly.
Description
Technical Field
The utility model belongs to the technical field of cables, and particularly relates to a medium-voltage environment-friendly flame-retardant water-blocking cable.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the promotion of new national fire control standards, the fire control standards in the building field are becoming stricter, and the importance of the power cable as a key material for guaranteeing fire safety is increasingly prominent, so that the power cable is widely focused. In the current high-standard environment, the B1-level flame-retardant cable is required in places with large passenger flow, such as schools, hospitals, subways, airports, stadiums, convention centers and the like. From the technical point of view, the optimal design of the flame-retardant cable mainly focuses on the improvement of the cable structure, for example, the flame-retardant performance is improved by adding a flame-retardant layer or an oxygen-isolating layer. In terms of material selection, manufacturers continuously strengthen the flame retardant property of the cable by replacing the traditional filling rope with a flame retardant filling rope, or adding flame retardant mud before extruding the outer sheath, improving the formula of the outer sheath material and the like. The measures can construct a protective barrier when the cable is burnt, so that further damage of flame to the internal structure of the cable is effectively inhibited, and the flame-retardant effect is achieved. Meanwhile, the carefully chosen sheath materials can realize certain additional functions, such as low smoke, low spreading and the like.
For example, patent document CN210535412U discloses a flame-retardant water-blocking high-voltage crosslinked cable, wherein a non-metal sheath layer adopts a halogen-free low-smoke flame-retardant polyolefin sheath material to reduce the release amount of halogen gas and smoke during the combustion of the cable, a conductive layer adopts a flame-retardant polyolefin semi-conductive shielding sheath material, and the sheath layer and the conductive layer are extruded together to form a flame-retardant semi-conductive layer, so that the heat transfer during the combustion of the cable is reduced, and the flame retardant property of the cable is improved.
For another example, patent document with publication number CN209880251U discloses a low smoke zero halogen flame-retardant water-blocking armoured three-core medium voltage cable, the longitudinal water-blocking layer is formed by overlapping and wrapping semiconductive water-blocking tapes, the extrusion filling and isolation layer adopts a four-point one-line process to one-time extrusion filling the three-core gap and extrusion isolating sleeve to form a sealed seamless water-blocking whole, the armoured layer is formed by closely arranging flat metal wires on the isolation layer by adopting an auxiliary die, the low smoke zero halogen flame-retardant outer sheath is extruded directly, the armoured layer, the isolating sleeve and the outer sheath are combined into a whole to form a tight water-blocking structure, and the problems that the armoured cable is difficult to block water, the water-blocking cable is difficult to low smoke zero halogen flame-retardant, the three-core cable longitudinal wrapping aluminum-plastic composite tape and the metal sheath process are difficult to realize are solved.
And as disclosed in patent document CN217333708U, the conductive layer and the nonmetallic sheath layer are respectively disposed on the inner side and the outer side of the fire-blocking layer, and are both polyolefin layers, so that the conductive layer and the nonmetallic sheath layer will not generate excessive halogen in the combustion process, thereby improving the halogen-free performance of the cable, and being applicable to occasions with high flame retardant requirement and small secondary hazard, various people and smoke dense public places, and the like.
However, the inventor finds that, for specific cable laying environments, the additional functions of waterproof, moistureproof and the like with higher protection degree are required to be satisfied in addition to the performance of B1, the design structure of the prior majority of B1-level cables is unreasonable, a large amount of redundancy of materials is caused in the flame retardant performance, and the problem of unnecessary waste of flame retardant materials is caused.
Disclosure of utility model
The utility model aims to overcome the defects in the prior art, and provides a medium-voltage environment-friendly flame-retardant water-blocking cable, wherein a protective jacket with a multilayer structure is used for wrapping a wire to form a protective effect on the wire, and a double-layer steel belt is used for forming interlocking armor with an interlocking structure through a self-radian barb, so that flame moisture can be prevented from invading to damage an internal structure, a flame-retardant water-blocking function is realized, and the overall flame-retardant water-blocking performance of the cable can be greatly improved. In addition, the selected materials are halogen-free low-smoke materials, and no toxic or harmful gas is generated during combustion, so that the environment-friendly material is fully friendly.
In order to achieve the above object, the present utility model is realized by the following technical scheme:
The technical scheme provides a medium-voltage environment-friendly flame-retardant water-blocking cable which comprises a wire and a protective jacket coated outside the wire, wherein the protective jacket is of a multi-layer structure, and comprises a water-blocking tape wrapping protective layer, a metal water-blocking layer, a second glass fiber cloth wrapping layer, a spacer sleeve, a steel tape layer, a first glass fiber cloth wrapping layer and an outer jacket in sequence from inside to outside, wherein the steel tape layer is in interlocking armor, and a double-layer steel tape forms an interlocking structure through self radian barbs.
In at least one embodiment, the interlocking armor is a non-magnetic stainless steel tape interlocking armor.
In at least one embodiment, the metal water-resistant layer is a high-performance aluminum-plastic composite tape longitudinal wrapping.
In at least one embodiment, the outer sheath is a thermoplastic flame retardant type B1 halogen-free low smoke polyolefin sheath material having an oxygen index of not less than 32.
In at least one embodiment, the first glass fiber cloth wrapping layer and the second glass fiber cloth wrapping layer are halogen-free low-smoke high-flame-retardant glass fiber belts.
In at least one embodiment, the spacer is a thermoplastic flame retardant type B1 halogen-free low smoke polyolefin sheathing material having an oxygen index of not less than 40.
In at least one embodiment, the water-blocking tape wrapping protection layer is a semiconductive buffer water-blocking tape.
In at least one embodiment, the wire includes a conductor and a shielding water-resistant layer encased over the conductor.
In at least one embodiment, the shielding waterproof layer is of a multi-layer structure, and the shielding waterproof layer sequentially comprises a conductor shielding layer, an insulating shielding layer, a wire waterproof tape wrapping layer and a metal shielding layer from inside to outside.
In at least one embodiment, the wire-wound cladding is a semiconductive buffer water-blocking tape.
The technical scheme of the utility model has the following beneficial effects:
1) According to the medium-voltage environment-friendly flame-retardant water-blocking cable, the protective jacket with the multilayer structure is used for wrapping the wires to form a protective effect, the water-blocking tape wrapping protective layer, the metal water-blocking layer, the second glass fiber cloth wrapping layer, the isolation sleeve, the steel tape layer, the first glass fiber cloth wrapping layer and the outer sheath are sequentially arranged from inside to outside, wherein the steel tape layer adopts the double-layer steel tape to form interlocking armor with an interlocking structure through self radian barbs, so that flame moisture can be prevented from invading to damage the internal structure, the flame-retardant water-blocking function is realized, the overall flame-retardant water-blocking performance of the cable can be greatly improved, and a large amount of redundant materials are not needed when the flame-retardant performance is realized through more reasonable design of the cable structure, and the problem that flame-retardant materials are unnecessarily wasted can be effectively avoided.
2) According to the medium-voltage environment-friendly flame-retardant water-blocking cable, the isolation sleeve and the outer sheath on the outermost layer of the protective jacket are made of halogen-free low-smoke B1 flame-retardant materials, the combustion smoke quantity is small, toxic and harmful corrosive gas is not generated, the environment and human bodies are fully friendly, meanwhile, the medium-voltage environment-friendly flame-retardant water-blocking cable has the combustion self-extinguishing characteristic, and the insulation cable core is sheathed by a non-magnetic stainless steel belt in a linkage manner, the first glass fiber cloth is sheathed by the winding layer, and the second glass fiber cloth is sheathed by the winding layer in a synergistic manner, so that a better flame-retardant effect is achieved, and the insulation cable core can be better protected from being ablated by external flame.
3) The non-magnetic stainless steel belt interlocking armor of the medium-voltage environment-friendly flame-retardant water-blocking cable plays a role in isolating external moisture invasion, and is synergistic with the longitudinally-wrapped aluminum-plastic composite belt to better prevent external moisture, and the water-blocking belt swells when meeting water, so that the invasion of external water vapor and humid air can be better isolated.
4) The medium-voltage environment-friendly flame-retardant water-blocking cable has excellent flame retardant performance and good water-blocking effect, and in addition, the selected materials are halogen-free low-smoke materials, so that no toxic or harmful gas is generated during combustion, and the medium-voltage environment-friendly flame-retardant water-blocking cable is fully friendly to the environment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic view of a medium voltage environment-friendly flame-retardant water-blocking cable structure;
fig. 2 is a schematic diagram of a interlocking armor structure of a medium-voltage environment-friendly flame-retardant water-blocking cable.
In the figure, the outer sheath is 101, the first glass fiber cloth wrapping layer is 102, the steel tape layer is 103, the isolation sleeve is 104, the second glass fiber cloth wrapping layer is 105, the metal water-blocking layer is 106, the water-blocking tape wrapping protective layer is 107, the metal shielding layer is 201, the wire water-blocking tape wrapping layer is 202, the insulating shielding layer is 203, the insulating layer is 204, the conductor shielding layer is 205, and the conductor is 206.
The mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
As introduced by the background technology, the utility model aims to overcome the defects in the prior art, and provides the medium-voltage environment-friendly flame-retardant water-blocking cable, wherein a protective jacket with a multi-layer structure is used for wrapping a wire to form a protective effect on the wire, and a double-layer steel belt is used for forming interlocking armor with an interlocking structure through a self-radian barb, so that the flame moisture is prevented from invading to damage the internal structure, the flame-retardant water-blocking function is realized, and the overall flame-retardant water-blocking performance of the cable can be greatly improved. In addition, the selected materials are halogen-free low-smoke materials, and no toxic or harmful gas is generated during combustion, so that the environment-friendly material is fully friendly.
Example 1
As shown in fig. 1, the embodiment discloses a medium-voltage environment-friendly flame-retardant water-blocking cable, which comprises a wire and a protective jacket coated outside the wire, wherein the protective jacket is of a multi-layer structure, and comprises a water-blocking tape wrapping protective layer 107, a metal water-blocking layer 106, a second glass fiber cloth wrapping layer 105, a spacer sleeve 104, a steel belt layer 103, a first glass fiber cloth wrapping layer 102 and an outer sheath 101 from inside to outside. Wherein, the steel band layer 103 is the interlocking armor, and double-deck steel band forms interlocking structure through self radian barb.
In this embodiment, the interlocking armor is specifically a non-magnetic stainless steel tape interlocking armor. Because the single-core cable can form vortex after being electrified, a magnetic field is generated, the cable can be caused to be at high temperature, the non-magnetic stainless steel strip is used for armoring and then can play a role in shielding the magnetic field, and meanwhile, the stainless steel strip has good mechanical properties, so that the cable can be well protected and the tensile strength of the cable can be improved. In addition, the conventional armor is generally double-layer steel belt gap wrapping armor, and only plays a role in mechanical protection, namely only plays a role in compression resistance, and cannot prevent water and fire. The interlocking armored double-layer steel belt forms an interlocking structure through the radian barbs of the interlocking armor double-layer steel belt except the foundation cover, so that flame moisture can be prevented from invading to damage the internal structure, the flame-retardant and water-blocking function is realized, and the overall flame-retardant and water-blocking performance of the cable can be greatly improved.
In this embodiment, the metal water-resistant layer 106 is specifically a high-performance aluminum-plastic composite tape longitudinal wrapping, so that the overall water-resistant performance of the cable is further effectively enhanced, meanwhile, the strength of the cable is further increased by the aluminum-plastic composite tape longitudinal wrapping, meanwhile, the electric field inside the cable is radially formed, the distortion of the electric field inside the cable is effectively prevented, and the transmission efficiency of the cable is ensured. Moreover, the aluminum-plastic composite belt longitudinal wrapping has the characteristics of low cost and mature processing technology, and can reduce the production cost, the transportation cost and the installation cost of the cable.
In this embodiment, the outer sheath 101 is a thermoplastic flame-retardant B1 type halogen-free low-smoke polyolefin sheath material, and the oxygen index is required to be equal to or greater than 32, so that the halogen-free low-smoke, non-toxic gas release and no combustion dripping are achieved while the basic flame-retardant grade B1 is satisfied.
In this embodiment, the first glass fiber cloth wrapping layer 102 and the second glass fiber cloth wrapping layer 105 are halogen-free low-smoke high-flame-retardant glass fiber belts, so that the halogen-free low-smoke, non-toxic gas release and no combustion dripping are achieved while the basic flame-retardant grade B1 is met, and meanwhile, the glass fiber cloth wrapping layer has higher flame retardant performance and longitudinal tensile force, and has interlocking armor synergistic effect with a non-magnetic stainless steel belt, so that the toughness and the compression resistance of the protective jacket can be further increased.
In this embodiment, the spacer 104 is a thermoplastic flame-retardant B1 type halogen-free low-smoke polyolefin sheath material, and the oxygen index is required to be equal to or greater than 40, so as to meet the requirement of flame retardance in cooperation with the outer sheath 101 when the cable burns, and ensure the normal operation inside the cable.
In this embodiment, the water blocking tape wrapping protection layer 107 is specifically a semiconductive buffer water blocking tape, and acts together with the metal water blocking layer 106 to further enhance the overall radial water blocking performance of the cable, block the entry of water vapor, and avoid the water resin aging of the cable insulation layer 204 caused by the entry of water vapor to cause insulation breakdown.
In this embodiment, the wire includes a conductor 206 and a shielding water-blocking layer wrapped outside the conductor 206, the shielding water-blocking layer is a multi-layer structure, and includes, from inside to outside, a conductor shielding layer 205, an insulating layer 204, an insulating shielding layer 203, a wire water-blocking tape wrapping layer 202, and a metal shielding layer 201. The conductor 206 is protected by the shielding and water blocking layers of the multilayer structure, which increases the safety and reliability of the conductor 206.
In this embodiment, the wire-wound cladding 202 is a semiconductive buffer water-blocking tape. The semi-conductive water-blocking buffer tape is adopted, so that the semi-conductive water-blocking buffer tape can cooperate with the metal shielding layer 201 shielded by the steel tape to further homogenize the electric field of the insulated wire core, avoid the breakdown inside the cable caused by partial discharge and ensure the safety and stability of the insulated wire core.
According to the medium-voltage environment-friendly flame-retardant water-blocking cable, the outer sheath 101 in the protective jacket is made of thermoplastic flame-retardant B1 type halogen-free low-smoke polyolefin sheath material and is used for meeting the subway line laying environment, the steel belt layer 103 is made of a non-magnetic stainless steel belt interlocking armor structure, the compressive strength of the cable is improved, the radial water-blocking performance of the cable is enhanced, the metal water-blocking layer 106 is made of an aluminum plastic composite belt, the mechanical performance of the cable is enhanced while the water-blocking performance is enhanced, the inner electric field of the cable is radially formed by longitudinally wrapping the aluminum plastic composite belt, the distortion of the inner electric field of the cable is effectively prevented, the transmission efficiency of the cable is guaranteed, the water-blocking belt wrapping protective layer 107 and the wire water-blocking belt wrapping layer 202 are used cooperatively with the metal shielding layer 201 while the water-blocking performance of the cable is enhanced, the insulation cable core electric field is further homogenized, the inner breakdown of the cable caused by partial discharge is avoided, and the safety and stability of the insulation cable core are guaranteed. In addition, compared with the ceramic silicone rubber, the thermoplastic flame-retardant B1 type halogen-free low-smoke polyolefin sheath material can avoid thermal expansion of the insulating wire core in the re-vulcanization process of the ceramic silicone rubber, so that too tight combination is generated at the insulating shielding position and the metal shielding position, obvious copper strip tightening marks are generated on the surface of the insulating shielding position after the wire core is cooled, the process cost is reduced, and the surface quality of the cable is improved.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A medium-voltage environment-friendly flame-retardant water-blocking cable is characterized by comprising a wire and a protective jacket coated outside the wire, wherein the protective jacket is of a multi-layer structure, and comprises a water-blocking tape wrapping protective layer, a metal water-blocking layer, a second glass fiber cloth wrapping layer, a spacer sleeve, a steel tape layer, a first glass fiber cloth wrapping layer and an outer jacket in sequence from inside to outside, wherein the steel tape layer is of a linkage armor, and a double-layer steel belt forms an interlocking structure through a self radian barb.
2. A medium voltage environment friendly flame retardant water blocking cable according to claim 1, wherein said interlocking armor is a non-magnetic stainless steel tape interlocking armor.
3. The medium voltage environment-friendly flame-retardant water-blocking cable according to claim 1, wherein the metal water-blocking layer is a high-performance aluminum-plastic composite tape longitudinal wrapping.
4. The medium voltage environment-friendly flame-retardant water-blocking cable according to claim 1, wherein the outer sheath is a thermoplastic flame-retardant B1 type halogen-free low-smoke polyolefin sheath material with an oxygen index not less than 32.
5. The medium voltage environment-friendly flame-retardant water-blocking cable according to claim 1, wherein the first glass fiber cloth wrapping layer and the second glass fiber cloth wrapping layer are halogen-free low-smoke high-flame-retardant glass fiber tapes.
6. The medium voltage environment-friendly flame-retardant water-blocking cable according to claim 1, wherein the isolation sleeve is a thermoplastic flame-retardant B1 type halogen-free low-smoke polyolefin sheath material with an oxygen index of not less than 40.
7. A medium voltage environment friendly flame retardant water blocking cable according to claim 1 wherein the water blocking tape wrapping protective layer is a semiconducting buffer water blocking tape.
8. A medium voltage environmentally friendly flame retardant water resistant cable according to claim 1 wherein said conductor comprises a conductor and a shielding water resistant layer surrounding the conductor.
9. The medium voltage environment-friendly flame-retardant water-blocking cable according to claim 8, wherein the shielding water-blocking layer is of a multi-layer structure, and comprises a conductor shielding layer, an insulating shielding layer, a wire water-blocking tape wrapping layer and a metal shielding layer from inside to outside.
10. A medium voltage environment friendly flame retardant water blocking cable according to claim 9, wherein said wire water blocking tape is in particular a semiconducting buffer water blocking tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422922981.7U CN223638153U (en) | 2024-11-28 | 2024-11-28 | Medium-voltage environment-friendly flame-retardant water-blocking cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422922981.7U CN223638153U (en) | 2024-11-28 | 2024-11-28 | Medium-voltage environment-friendly flame-retardant water-blocking cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223638153U true CN223638153U (en) | 2025-12-05 |
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ID=97858380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202422922981.7U Active CN223638153U (en) | 2024-11-28 | 2024-11-28 | Medium-voltage environment-friendly flame-retardant water-blocking cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223638153U (en) |
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2024
- 2024-11-28 CN CN202422922981.7U patent/CN223638153U/en active Active
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