CN105304190A - Longitudinal watertight power cable - Google Patents
Longitudinal watertight power cable Download PDFInfo
- Publication number
- CN105304190A CN105304190A CN201510729976.7A CN201510729976A CN105304190A CN 105304190 A CN105304190 A CN 105304190A CN 201510729976 A CN201510729976 A CN 201510729976A CN 105304190 A CN105304190 A CN 105304190A
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- CN
- China
- Prior art keywords
- cable
- eva rubber
- rubber
- power cable
- cable core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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 invention discloses a longitudinal watertight power cable. The longitudinal watertight power cable includes a cable core which is formed by intertwisting three insulating wire cores, rubber tapes which are 25mm wide and 1mm thick and prepared by EVA rubber liquid are arranged in gaps of the cable core, and an EVA rubber outer sheath which is 40mm wide and 3mm thick is extruded at the outermost layer of the cable core. According to the longitudinal watertight power cable provided by the invention, molten EVA rubber is arranged in wire bunching, re-intertwisting and cabling processes of the cable, and the EVA rubber is naturally cooled in air, thereby facilitating subsequent machining. In an extruding process, and the EVA rubber and the insulating wire cores or the sheath are vulcanized at the same time, so that inside and outside of the cable are tightly combined together, thereby realizing a water-blocking function of the cable. The EVA rubber does not contain toxic substances, does not generate toxic gas in a burning process, and produces little smoke, thereby realizing low-voltage halogen-free functions of the cable.
Description
Technical field
The present invention relates to field of cable technology, particularly relate to a kind of direction waterproof power cable.
Background technology
Direction waterproof power cable, require that cable longitudinally has the hydraulic pressure that at least can bear certain pressure, in order to reach such requirement, domestic main employing two kinds of technical schemes solve:
(1) void filler of cable is water blocking yarn, answers wrapped one deck waterstop after stranding, and waterstop should be overlapping wrapped, and the rate of putting up is greater than 30%, and cable adopts duplex sheath, and inner sheath adopts polyethylene, oversheath employing polyvinyl chloride.Inner sheath thickness is according to the requirement of the inner covering of GB2952, and oversheath thickness is according to the requirement of GB2952.Immersing cable when there being water is, entering of the water blocking yarn rear exclusion of water of energy, thus realizes the water stop function of cable.
(2) cable adopts the scheme of gluing (its glue is in the nature neoprene glue) in process of production.Equal cementing in synnema, multiple strand, cabling process, the material that what such cable sheath material adopted is containing chlorine is pvc material mostly.When cable is in squeezing bag sulfuration process, neoprene glue, can firmly be bonded together because character is similar with chloride elastomeric material, thus is all filled up in inner for cable all spaces, achieves the function of the direction waterproof of cable.
Prior art Problems existing and shortcoming:
Along with watertight requires more and more higher, block water at present and require that the resistance to pressure pressure of the longitudinal direction of cable will to more than 6Mpa, when adopting above-mentioned (1) to plant mode, cable conductor is outside, sheath inside has certain voltage withstand class, but the conductor of cable does not but have watertight ability, under the hydraulic pressure of 6Mpa, cable conductor does not reach the requirement that blocks water, such cable blocks water B level, namely the B level that blocks water requires to have radial water-resisting structure, does not reach the A level that blocks water, and the A level that namely blocks water wants conductor and insulation all will block water.Adopt above-mentioned (2) to plant mode, the A level that blocks water can be reached, but there are two shortcomings: 1. watertight pressure is maximum can only reach 4.5Mpa, cannot reach the requirement of 6Mpa.2. due to the polychloroprene material that cable adopts, cable has in combustion and has a large amount of cigarette and toxic gas, be not suitable for using in closed environment, and such cable is typically used in closed environment.
Summary of the invention
The present invention, in order to solve the problem of prior art, provides a kind of direction waterproof power cable, make cable can sustain the hydraulic pressure of more than 6Mpa, and cable has low smoke and zero halogen, the function of antiultraviolet.
A kind of direction waterproof power cable of the present invention, comprises cable core, and described cable core forms by three insulated wire cores are stranded; Filling wide 25mm, the thickness be made up of EVA rubber liquid in the gap of cable core is the rubber strip of 1mm, extrudes at the outermost layer of cable core the EVA rubber outer protection cover that width is 40mm, thickness is 3mm.
Further improvement, the ethylene propylene rubber insulated layer that described insulated wire cores is 2mm by conductor and the thickness be extruded in outside conductor is formed.
Further improvement, instills EVA rubber liquid and forms while described conductor is twisted by copper wire bundle.
New beneficial effect is:
1, the present invention inserts the EVA rubber of thawing in the synnema of cable, multiple strand, cabling process, and EVA rubber cools in atmosphere naturally, facilitates following process.Extruding in process, EVA rubber and insulation or sheath sulfuration simultaneously, such that cable is inside and outside to be closely linked, achieving the water stop function of cable.EVA rubber is not containing noxious substance simultaneously, and do not produce toxic gas in combustion, the amount of being fuming is little simultaneously, thus realizes the low-pressure halogen-free function of cable.
2, present invention employs the new construction of cable, select suitable material, thus make direction waterproof cable can sustain the hydraulic pressure of more than 6Mpa, and cable has low smoke and zero halogen, the function of antiultraviolet.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
A kind of direction waterproof power cable as shown in Figure 1, comprises cable core, and described cable core forms by three insulated wire cores are stranded; Fill the rubber strip 3 that wide 25mm, the thickness be made up of EVA rubber liquid are 1mm in the gap of cable core, extrude at the outermost layer of cable core the EVA rubber outer protection cover 4 that width is 40mm, thickness is 3mm.
The ethylene propylene rubber insulated layer 2 that described insulated wire cores is 2mm by conductor 1 and the thickness be extruded in outside conductor 1 is formed.
Instill EVA rubber liquid while described conductor 1 is twisted by copper wire bundle to form.
Cable is in bundle strand process, first EVA rubber is melted before a mold, rubber strip melt temperature is 90 degrees Celsius, being melted into gelatinous EVA rubber drop enters in copper wire, in multiple strand process, also this kind of mode is adopted to enter in conductor by EVA rubber drop, conductor is made by this kind of mode, be extruded with outside conductor and ethylene propylene rubber insulatedly make insulated electric conductor, again three insulated electric conductors are undertaken stranded by parallel way, instill EVA rubber liquid before stranded before a mold, make cable core, then outside cable core, be extruded with EVA sheath.
Embody rule approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (3)
1. a direction waterproof power cable, comprises cable core, it is characterized in that: described cable core forms by three insulated wire cores are stranded; Filling wide 25mm, the thickness be made up of EVA rubber liquid in the gap of cable core is the rubber strip of 1mm, extrudes at the outermost layer of cable core the EVA rubber outer protection cover that width is 40mm, thickness is 3mm.
2. direction waterproof power cable according to claim 1, is characterized in that: the ethylene propylene rubber insulated layer that described insulated wire cores is 2mm by conductor and the thickness be extruded in outside conductor is formed.
3. direction waterproof power cable according to claim 2, is characterized in that: instill EVA rubber liquid while described conductor is twisted by copper wire bundle and form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510729976.7A CN105304190A (en) | 2015-11-02 | 2015-11-02 | Longitudinal watertight power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510729976.7A CN105304190A (en) | 2015-11-02 | 2015-11-02 | Longitudinal watertight power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105304190A true CN105304190A (en) | 2016-02-03 |
Family
ID=55201334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510729976.7A Pending CN105304190A (en) | 2015-11-02 | 2015-11-02 | Longitudinal watertight power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105304190A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5772206A (en) * | 1980-10-23 | 1982-05-06 | Sumitomo Electric Industries | Watertight wire or cable |
| CN1661731A (en) * | 2005-01-26 | 2005-08-31 | 上海电缆研究所 | Longitudinal watertightness cable/wire |
| CN204614490U (en) * | 2015-05-20 | 2015-09-02 | 江苏中煤电缆有限公司 | A kind of direction waterproof degaussing cable |
-
2015
- 2015-11-02 CN CN201510729976.7A patent/CN105304190A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5772206A (en) * | 1980-10-23 | 1982-05-06 | Sumitomo Electric Industries | Watertight wire or cable |
| CN1661731A (en) * | 2005-01-26 | 2005-08-31 | 上海电缆研究所 | Longitudinal watertightness cable/wire |
| CN204614490U (en) * | 2015-05-20 | 2015-09-02 | 江苏中煤电缆有限公司 | A kind of direction waterproof degaussing cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160203 |