CN215933268U - Medium-voltage water-blocking fire-resistant power cable - Google Patents
Medium-voltage water-blocking fire-resistant power cable Download PDFInfo
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- CN215933268U CN215933268U CN202122375668.2U CN202122375668U CN215933268U CN 215933268 U CN215933268 U CN 215933268U CN 202122375668 U CN202122375668 U CN 202122375668U CN 215933268 U CN215933268 U CN 215933268U
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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 provides a fire-resistant power cable of middling pressure water blocking, belongs to cable manufacturing technical field, including the band layer that blocks water, the band layer that blocks water is equipped with at least one insulation core who contains metal shielding, and the cover is equipped with fire-resistant isolation layer, fire-retardant band layer and oversheath outside the band layer that blocks water in proper order, insulation core intussuseption is filled with first material that blocks water, it has the second material that blocks water to fill between insulation core and the band layer that blocks water, be equipped with the sleeve pipe in the fire-resistant isolation layer, the sleeve pipe intussuseption is filled with the fire retardant, it separates the oxygen layer to be equipped with between band layer and the fire-resistant isolation layer to block water, be equipped with the fire-retardant piece that a plurality of even settings between fire-retardant band layer and the oversheath. According to the utility model, the cable has good radial and longitudinal moisture-proof and water-blocking performances, and meanwhile, the heat transmitted to the insulating wire core by external heat is limited, so that the cable can be ensured to be normally powered in flame for a certain time, and the fire-resistant function of the medium-voltage power cable is realized.
Description
Technical Field
The utility model belongs to the technical field of cable manufacturing, relates to a power cable, and particularly relates to a medium-voltage water-blocking fire-resistant power cable.
Background
With the rapid increase of urban population, people in high-rise buildings, large shopping malls, exhibition centers, subways, airports, stations, large stadiums, libraries, museums, hospitals, hotels, telecommunication buildings, data centers and other places are more and more dense and important, and the power consumption is also continuously increased. The trunk lines at these locations require medium voltage power cables, while the lines associated with aisle lighting, fire alarm devices, automatic fire protection and other emergency facilities also require the cables to be fire resistant. Because the cable line laying environment is complex, some places are in a humid environment for a long time, and the requirements of moisture prevention and water resistance are provided for the cable so as to ensure that the cable can run safely for a long time.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a medium voltage water-blocking fire-resistant power cable, which is used to solve the technical problem of poor fire-resistance, moisture-proof and water-blocking performance of the medium voltage power cable in the prior art.
In order to achieve the above and other related objects, the utility model provides a medium-voltage water-blocking fire-resistant power cable, which includes a water-blocking belting layer, wherein at least one metal-shielding insulating wire core is arranged in the water-blocking belting layer, a fire-resistant isolation layer, a fire-resistant belting layer and an outer sheath are sequentially sleeved outside the water-blocking belting layer, a first water-blocking material is filled in the insulating wire core, a second water-blocking material is filled between the insulating wire core and the water-blocking belting layer, an oxygen-isolating layer is arranged between the water-blocking belting layer and the fire-resistant isolation layer, and a plurality of evenly-arranged fire-resistant pieces are arranged between the fire-resistant belting layer and the outer sheath.
In any of the above schemes, preferably, the insulated wire core includes a semiconductive conductor shielding layer, the semiconductive conductor shielding layer is internally provided with a plurality of point-contacted conductors, and the semiconductive conductor shielding layer is externally provided with an insulating layer, an insulated shielding layer, a semiconductive water-blocking tape and a copper tape shielding layer in sequence.
In any of the above embodiments, preferably, the first water blocking material is filled in a gap between any two adjacent conductors.
In any of the above schemes, preferably, a sleeve is arranged in the fire-resistant isolation layer, and the sleeve is filled with a fire retardant.
In any of the above schemes, preferably, the outer wall of the flame-retardant belting layer protrudes outwards along the circumferential direction to form a plurality of protrusions connected with each other, and the flame-retardant member is arranged in the groove between any two adjacent protrusions.
In any of the above schemes, preferably, a metal armor layer is disposed between the flame-retardant wrapping layer and the outer sheath.
In any of the above embodiments, preferably, the flame retardant member is disposed between the flame retardant belting layer and the metal armor layer.
In any of the above embodiments, preferably, the flame retardant member has a cylindrical shape.
As described above, the medium-voltage water-blocking fire-resistant power cable of the present invention has the following beneficial effects:
1. according to the utility model, the gaps in the conductor are filled with the first water-blocking material, the second water-blocking material is filled between the insulating wire core and the water-blocking wrapping tape layer, and the fire-resistant isolation layer is made of hydrophobic materials, so that the power cable has good radial and longitudinal moisture-proof and water-blocking performances.
2. In the utility model, the water-blocking wrapping tape layer 1 is wrapped by the oxygen-insulating layer, the fire-resistant isolating layer and the flame-retardant wrapping tape layer, when the cable is in flame, the fire-resistant isolating layer starts to be fired into a hard ceramic armor shell at 350 ℃, and the harder the shell is fired, the longer the firing time is. The ceramic armored shell is compact cellular fine micropores, has low heat conductivity coefficient, and can play a good role in fire insulation, fire resistance, oxygen insulation, heat insulation and flame retardance. The oxygen-isolating layer is heated and decomposed, absorbs a large amount of heat around and generates crystal water to reduce the temperature of the cable core, and meanwhile, the surface of the oxygen-isolating layer is carbonized and crusted to isolate oxygen, thereby playing the effects of heat insulation and oxygen isolation. The double-layer composite action of the oxygen isolation layer and the fire-resistant isolation layer enables heat outside to be transferred to the insulating wire core in a limited manner, and the cable can be normally powered within a certain time when being in flame, so that the fire-resistant function of the medium-voltage power cable is realized.
3. According to the utility model, the flame-retardant part is arranged between the flame-retardant wrapping layer and the outer sheath, so that when high-temperature combustion occurs outside the cable, the flame-retardant part falls off after the outer sheath is combusted, and the flame-retardant part brings away part of high temperature and fire source in the falling process, thereby further playing a fire-proof role on the cable and improving the fire resistance of the cable.
Drawings
Fig. 1 shows a schematic structural view of a metal-free armor layer of the present invention.
Fig. 2 shows a schematic structural view of a metallic armor layer of the present invention.
Description of the element reference numerals
The cable comprises a water blocking wrapping layer 1, an insulating wire core 2, a conductor 21, a semiconductive conductor 22, an insulating layer 23, an insulating shielding layer 24, a semiconductive water blocking tape 25, a copper strip shielding layer 26, a fireproof isolating layer 3, a sleeve 31, a flame retardant 32, a flame retardant wrapping layer 4, a protrusion 41, an outer sheath 5, a first water blocking material 6, an oxygen isolating layer 7, a flame retardant 8, a second water blocking material 9 and a metal armor layer 10.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1-2. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1-2, the utility model provides a medium-voltage water-blocking fire-resistant power cable, which includes a water-blocking belting layer 1, at least one metal-shielding insulating wire core 2 is arranged in the water-blocking belting layer 1, a fire-resistant isolation layer 3, a fire-resistant belting layer 4 and an outer sheath 5 are sequentially sleeved outside the water-blocking belting layer 1, a first water-blocking material 6 is filled in the insulating wire core 2, a second water-blocking material 9 is filled between the insulating wire core 2 and the water-blocking belting layer 1, an oxygen-isolating layer 7 is arranged between the water-blocking belting layer 1 and the fire-resistant isolation layer 3, and a plurality of evenly-arranged fire-resistant pieces 8 are arranged between the fire-resistant belting layer 4 and the outer sheath 5.
When the waterproof wrapping tape layer 1 is used in the embodiment, the waterproof wrapping tape layer 1 can play a role in water resistance and moisture resistance on the conductor 21 in the insulating wire core 2. Meanwhile, a gap in the conductor 21 in the insulating wire core 2 is filled with a first water blocking material 6, a second water blocking material 9 is filled between the insulating wire core 2 and the water blocking belting layer 1, and the first water blocking material 6 and the second water blocking material 9 are arranged to further play a role in preventing moisture and water for the conductor 21, so that the power cable has good radial and longitudinal moisture and water resistance, and the long-term safe operation of the cable is ensured.
The water-blocking wrapping tape layer 1 wraps the oxygen-insulating layer 7, the fire-resistant isolating layer 3 and the flame-retardant wrapping tape layer 4, when the cable is in flame, the fire-resistant isolating layer 3 starts to be fired into a hard ceramic armor shell at 350 ℃, and the harder the shell is as the firing time is longer. The ceramic armored shell is compact cellular fine micropores, has low heat conductivity coefficient, and can play a good role in fire insulation, fire resistance, oxygen insulation, heat insulation and flame retardance. In 3 combustion processes of fire-resistant isolation layer, separate oxygen layer 7 and be heated decomposition, absorb a large amount of heats and produce crystal water around, reduce the cable core temperature on the one hand, on the other hand reduces the temperature of fire-resistant isolation layer 3, makes 3 combustion temperature of fire-resistant isolation layer reduce, even stops the burning, separates oxygen layer 7 surface simultaneously and can the carbonization crust to isolated oxygen plays thermal-insulated, separates the effect of oxygen. Therefore, the double-layer composite action of the oxygen isolation layer 7 and the fire-resistant isolation layer 3 limits the heat transferred from the outside to the insulated wire core 2, and ensures that the cable can normally supply power within a certain time when being in flame, thereby realizing the fire-resistant function of the medium-voltage power cable.
Fire-retardant 8 sets up between fire-retardant band layer 4 and oversheath 5, and contact does not connect nevertheless between fire-retardant 8 and fire-retardant band layer 4 and the oversheath 5, when the outside high temperature burning that takes place of cable, fire-retardant 8 can play fire-retardant effect on the one hand, reduces high temperature and fire source and transmits to fire-retardant band layer 4 to reduce the damage of fire-retardant band layer 4. On the other hand, after the outer sheath 5 is burnt, the flame-retardant part 8 loses the protection and support effect of the outer sheath 5 and falls, and the flame-retardant part 8 takes away the high temperature and the fire source of the burning of the outer sheath 5 in the falling process, so that the flame-retardant part has a flame-proof effect on the cable in one step, and the fire resistance of the cable is improved.
The first water-blocking material 6 and the second water-blocking material 9 may adopt one or more of ointment, water-blocking yarn, hot melt adhesive and the like.
As a further description of the above embodiment, the insulated wire core 2 includes a semi-conductive conductor shielding layer 22, a plurality of point-contacted conductors 21 are disposed in the semi-conductive conductor shielding layer 22, and an insulating layer 23, an insulating shielding layer 24, a semi-conductive water-blocking tape 25 and a copper tape shielding layer 26 are sequentially disposed outside the semi-conductive conductor shielding layer 22. The first water blocking material 6 is filled in the gap between any two adjacent conductors 21.
When the cable is used in the embodiment, the first water blocking material 6 is arranged in the gap between the conductors 21, so that the conductors 21 can be protected, water entering the semi-conductive conductor shielding layer 22 is prevented from entering the conductors 21, and the cable can be used in a dark and humid environment for a long time.
As a further description of the above embodiment, a sleeve 31 is provided in the fire-resistant isolation layer 3, and the sleeve 31 is filled with a fire retardant 32.
When this embodiment uses, fire-resistant isolation layer 3 and sleeve pipe 31 all adopt hydrophobic material to make, and sleeve pipe 31 can keep apart fire-resistant isolation layer 3 for the three-layer, effectively reduces external water and passes through fire-resistant isolation layer 3 to reduce in external water enters into conductor 21, make the cable have good dampproofing, the water blocking performance.
In this embodiment, the fire-resistant isolation layer 3 and the fire retardant 32 are arranged to provide a double-layer fire-resistant and heat-insulating effect for the conductor 21, thereby improving the fire resistance of the cable.
In this embodiment, a flame retardant agent different from the flame retardant agent 32 in the sleeve 31 can be filled between the inner wall of the fire-resistant isolation layer 3 and the outer wall of the sleeve 31, so as to increase the diversity of fire-resistant and heat-insulating modes, thereby further improving the fire-resistant and heat-insulating properties of the cable.
As a further example of the above embodiment, it is sold that the outer wall of the flame retardant belting layer 4 is outwardly protruded along the circumferential direction thereof to form a plurality of protrusions 41 connected to each other, the flame retardant member 8 is disposed in the groove between any two adjacent protrusions 41, and the flame retardant member 8 is cylindrical.
When this embodiment uses, 4 outer walls on fire-retardant band layer set up interconnect's arch 41, and fire-retardant 8 sets up and can play a location spacing effect to fire-retardant 8 in the recess between two adjacent archs 41, guarantees the stability of the installation of fire-retardant 8 in the cable, prevents that fire-retardant 8 from taking place to remove and causing cable surface bulge or sunken to guarantee the planarization of cable surface, guarantee the cable quality.
In this embodiment, the fire-retardant member 8 is cylindrical, so that the fire-retardant member 8 is prevented from being stuck between two adjacent protrusions 41 and cannot fall off during the combustion process.
In this embodiment, a metal armor layer 10 is disposed between the flame-retardant wrapping layer 4 and the outer sheath 5. The flame-retardant piece 8 is arranged between the flame-retardant belting layer 4 and the metal armor layer 10.
In conclusion, the cable has good radial and longitudinal moisture-proof and water-blocking performances, and meanwhile, the heat transmitted to the insulating wire core by the external heat is limited, so that the cable can be ensured to normally supply power in flame for a certain time, and the fire-resistant function of the medium-voltage power cable is realized. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a fire-resistant power cable that middling pressure blocks water, is including the band layer (1) that blocks water, be equipped with at least one insulation core (2) that contain metallic shield in the band layer (1) that blocks water, the band layer (1) that blocks water is outer in proper order to overlap and is equipped with fire-resistant isolation layer (3), fire-retardant band layer (4) and oversheath (5), its characterized in that: insulating sinle silk (2) intussuseption is filled with first material (6) that blocks water, it has second material (9) that blocks water to fill between insulating sinle silk (2) and the belting layer that blocks water (1), it separates oxygen layer (7) to be equipped with between belting layer that blocks water (1) and fire-resistant isolation layer (3), be equipped with fire-retardant (8) that a plurality of pieces evenly set up between fire-retardant belting layer (4) and oversheath (5).
2. The medium voltage water-blocking fire resistant power cable of claim 1, wherein: the insulation wire core (2) comprises a semi-conductive conductor shielding layer (22), a plurality of point-contacted conductors (21) are arranged in the semi-conductive conductor shielding layer (22), and an insulation layer (23), an insulation shielding layer (24), a semi-conductive water-blocking tape (25) and a copper strip shielding layer (26) are sequentially arranged outside the semi-conductive conductor shielding layer (22).
3. The medium voltage water-blocking fire resistant power cable according to claim 2, characterized in that: the first water-blocking material (6) is filled in a gap between any two adjacent conductors (21).
4. The medium voltage water-blocking fire resistant power cable of claim 1, wherein: be equipped with sleeve pipe (31) in fire-resistant isolation layer (3), sleeve pipe (31) intussuseption is filled with fire retardant (32).
5. The medium voltage water-blocking fire resistant power cable of claim 1, wherein: the outer wall of the flame-retardant belting layer (4) is outwards protruded along the circumferential direction to form a plurality of protrusions (41) which are connected with each other, and the flame-retardant pieces (8) are arranged in grooves between any two adjacent protrusions (41).
6. The medium voltage water-blocking fire resistant power cable of claim 1, wherein: and a metal armor layer (10) is arranged between the flame-retardant wrapping layer (4) and the outer sheath (5).
7. The medium voltage water-blocking fire resistant power cable according to claim 6, characterized in that: the flame-retardant piece (8) is arranged between the flame-retardant belting layer (4) and the metal armor layer (10).
8. The medium voltage water-blocking fire resistant power cable of claim 1, wherein: the flame-retardant member (8) is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122375668.2U CN215933268U (en) | 2021-09-29 | 2021-09-29 | Medium-voltage water-blocking fire-resistant power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122375668.2U CN215933268U (en) | 2021-09-29 | 2021-09-29 | Medium-voltage water-blocking fire-resistant power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215933268U true CN215933268U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122375668.2U Active CN215933268U (en) | 2021-09-29 | 2021-09-29 | Medium-voltage water-blocking fire-resistant power cable |
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| Country | Link |
|---|---|
| CN (1) | CN215933268U (en) |
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2021
- 2021-09-29 CN CN202122375668.2U patent/CN215933268U/en active Active
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