CN110706869A - Production device for multi-core cable longitudinal water-blocking cable core - Google Patents
Production device for multi-core cable longitudinal water-blocking cable core Download PDFInfo
- Publication number
- CN110706869A CN110706869A CN201910916531.8A CN201910916531A CN110706869A CN 110706869 A CN110706869 A CN 110706869A CN 201910916531 A CN201910916531 A CN 201910916531A CN 110706869 A CN110706869 A CN 110706869A
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- China
- Prior art keywords
- pipe
- foaming
- core
- foaming agent
- cable
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/221—Sheathing; Armouring; Screening; Applying other protective layers filling-up interstices
Abstract
The invention discloses a production device for a multi-core cable longitudinal water-blocking cable core, which comprises a branching cover plate, a foaming filling pipe and a shaping pipe, wherein the branching cover plate is arranged at the inlet end of the foaming filling pipe, and the other end of the foaming filling pipe is fixedly connected with the shaping pipe; the foaming filling device is characterized by further comprising a mixing pipe, the discharge end of the mixing pipe is communicated with the side wall of the foaming filling pipe, the mixing pipe is communicated with a foaming agent pumping pipeline and a compressed gas injection pipeline, and the other end of the mixing pipe is provided with a material pushing screw rod. The insulation wire cores enter the foaming filling pipe through the branching cover plate and are twisted together with the polyurethane foaming agent mixed with compressed gas, and all gaps among the insulation wire cores are filled with the foaming agent in the shaping pipe for shaping. In the production process of the invention, polyurethane foaming at normal temperature can not cause damage to the insulated wire core, micropores formed by polyurethane foaming can not absorb moisture, the cable core is tightly filled and has a round appearance, the longitudinal water resistance of the cable core is excellent, and the weight of the cable core is lighter.
Description
Technical Field
The invention relates to the technical field of water-blocking filling of cable cores, in particular to a production device for a multi-core cable longitudinal water-blocking cable core.
Background
In the cable production process, there is the clearance of not uniform in size between the sinle silk of multicore cable, this kind of clearance if fill not closely knit just leads to moisture infiltration cable core easily, to the insulating cable of crosslinked polyethylene, the infiltration of moisture will bring insulating material's water branch ageing, seriously influences the life of cable. In addition, the appearance and the roundness of the cable are directly influenced by the filling quality of the gap at the periphery of the cable core. The traditional method for filling the multi-core cable core is to use a polypropylene tearing film filling rope, and the polypropylene tearing film filling rope is twisted into the cable core in parallel with the cable core during filling. The filling rope is not fixed at the cross section of the cable core and is easy to deviate from a gap needing to be filled, so the roundness of the cable core is not ideal. Although the polypropylene tear film fill string is a non-hygroscopic material, water vapor can still readily penetrate into the cable core due to the longitudinal siphoning effect.
In the filling production of the medium-voltage power cable core, a foaming filling strip customized according to the structural size of the cable is provided, and the cable core filled by the filling strip has very good roundness and almost no longitudinal water blocking function.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
In order to solve the above-mentioned drawbacks, the present invention aims to provide a device for producing a longitudinal water-blocking cable core. The production device of the invention injects the polyurethane foaming agent into the cable core gap when the multi-core cable core is produced in a cable-forming way, and the filled cable core has round appearance through the shaping pipe. The polyurethane foaming agent is injected quantitatively through a gear pump and is easy to control. The polyurethane foaming can form closed micropores, the material does not absorb moisture, all gaps are densely filled, the longitudinal waterproof performance of the cable core is excellent, the appearance is round, and the structural weight is lighter.
In order to achieve the purpose, the invention is realized by the following technical scheme: a production device for a multi-core cable longitudinal water-blocking cable core comprises a branching cover plate, a foaming filling pipe and a shaping pipe, wherein the branching cover plate is arranged at the inlet end of an insulating wire core of the foaming filling pipe, and the other end of the foaming filling pipe is fixedly connected with the shaping pipe; the foaming and filling device is characterized by further comprising a mixing pipe, the discharge end of the mixing pipe is communicated with the side wall of the foaming and filling pipe, the side wall of the mixing pipe is communicated with a foaming agent pumping pipeline and a compressed gas injection pipeline, and a material pushing screw rod is arranged at one end, far away from the discharge end, of the mixing pipe.
Furthermore, the foaming agent pumping pipeline comprises a foaming agent pumping pipeline I and a foaming agent pumping pipeline II.
Further, the foaming agent pumping pipeline is connected with a gear pump.
Further, the gas communicated with the compressed gas injection pipeline is air or nitrogen.
The invention has the beneficial effects that:
1. the polyurethane foaming agent is foamed at normal temperature through the foaming agent pumping pipeline, the insulation wire cores of the multi-core cable cannot be damaged, micropores formed by foaming of the polyurethane foaming agent do not absorb moisture, the cable core is tightly filled and has a round and neat appearance, the longitudinal water-blocking performance of the cable core is excellent, the appearance is round and neat, and the structural weight is lighter. The polyurethane foaming agent is injected quantitatively through a gear pump and is easy to control.
2. The flame retardant can be added through a foaming agent pumping pipeline, the operation is simple, and the polyurethane has flame retardant performance after being foamed and filled.
3. And during continuous production, the filling material does not need to be replaced after stopping, and the production efficiency is high.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Figure 2 is a schematic structural view of a cable core produced by the production device of the present invention.
Wherein: 1. the cable comprises an insulation wire core, 2 parts of a branching cover plate, 3 parts of a foaming agent pumping pipeline I, 4 parts of a pushing screw rod, 5 parts of a foaming agent pumping pipeline II, 6 parts of a compressed gas injection pipeline 7, a mixing pipe 8, a foaming filling pipe 9, a shaping pipe 10, a finished cable core 11, a conductor 12, an insulation layer 13, a foaming agent 14 and a water blocking tape.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, a device for producing a multi-core cable longitudinal water-blocking core comprises a branching cover plate 2, a foaming filling pipe 8 and a shaping pipe 9, wherein the branching cover plate 2 is installed at the inlet end of an insulating wire core 1 of the foaming filling pipe 8, and the other end of the foaming filling pipe 8 is fixedly connected with the shaping pipe 9; the foaming and filling device is characterized by further comprising a mixing pipe 7, the discharge end of the mixing pipe 7 is communicated with the side wall of the foaming and filling pipe 8, the side wall of the mixing pipe 7 is communicated with a foaming agent pumping pipeline and a compressed gas injection pipeline 6, and one end, far away from the discharge end, of the mixing pipe 7 is provided with a material pushing screw rod 4. The foaming agent pumping pipeline comprises a foaming agent pumping pipeline I3 and a foaming agent pumping pipeline II 5. The foaming agent pumping pipeline is connected with a gear pump. The gas communicated with the compressed gas injection pipeline 6 is air or nitrogen.
The working process of the invention is as follows: a component A polyol of a polyurethane foaming agent is injected into the mixing pipe 7 through a foaming agent pumping pipeline I3, a component B isocyanate of the polyurethane foaming agent is injected into the mixing pipe 7 through a foaming agent pumping pipeline II 5, the component A and the component B of the polyurethane foaming agent are mixed in the rotating and pushing process of the pushing screw rod 4, and compressed gas enters the mixing pipe 7 through a compressed gas injection pipeline 6 and is mixed with the polyurethane foaming agent. The polyurethane foaming agent mixed with the compressed gas is pushed into the foam filling pipe 8 by the pushing screw 4.
Insulating wire cores 1 of the cable enter a foaming filling pipe 8 through a branching cover plate 2, are twisted with a polyurethane foaming agent and then enter a shaping pipe 9, the polyurethane foaming agent continuously foams and shapes in the shaping pipe 9, and gaps between the insulating wire cores 1 are fully filled by controlling the flow rates of a component A and a component B of the polyurethane foaming agent and the flow rate of compressed gas, so that a finished cable core 10 with a round appearance is formed.
In the production process, two layers of water-blocking tapes 14 can be wound and coated on the basis of the finished cable core 10. The water-blocking tape 14 not only plays a role of heat insulation to avoid outer layer polyurethane foam shrinkage caused by high temperature when the sheath is extruded, but also can enable the cable core and the sheath to have better longitudinal water-blocking performance.
As shown in fig. 2, the cable core produced by the production apparatus of the present invention includes a plurality of insulated cores 1 and a water-blocking tape 14 wrapped outside the insulated cores 1, a foaming agent 13 is filled in a gap between the insulated cores 1 and the water-blocking tape 14, and the insulated cores 1 include a conductor 11 and an insulating layer 12 wrapped outside the conductor 11.
Claims (4)
1. A production device for a multi-core cable longitudinal water-blocking cable core comprises a branching cover plate, a foaming filling pipe and a shaping pipe, wherein the branching cover plate is arranged at the inlet end of an insulating wire core of the foaming filling pipe, and the other end of the foaming filling pipe is fixedly connected with the shaping pipe; the method is characterized in that: the foaming and filling device is characterized by further comprising a mixing pipe, the discharge end of the mixing pipe is communicated with the side wall of the foaming and filling pipe, the side wall of the mixing pipe is communicated with a foaming agent pumping pipeline and a compressed gas injection pipeline, and a material pushing screw rod is arranged at one end, far away from the discharge end, of the mixing pipe.
2. The apparatus for producing a multi-core cable longitudinal water-blocking cable core as claimed in claim 1, wherein: the foaming agent pumping pipeline comprises a foaming agent pumping pipeline I and a foaming agent pumping pipeline II.
3. The apparatus for producing a multi-core cable longitudinal water-blocking cable core as claimed in claim 1, wherein: and the foaming agent pumping pipeline is connected with a gear pump.
4. The apparatus for producing a multi-core cable longitudinal water-blocking cable core as claimed in claim 1, wherein: the gas communicated with the compressed gas injection pipeline is air or nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910916531.8A CN110706869A (en) | 2019-09-26 | 2019-09-26 | Production device for multi-core cable longitudinal water-blocking cable core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910916531.8A CN110706869A (en) | 2019-09-26 | 2019-09-26 | Production device for multi-core cable longitudinal water-blocking cable core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110706869A true CN110706869A (en) | 2020-01-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910916531.8A Pending CN110706869A (en) | 2019-09-26 | 2019-09-26 | Production device for multi-core cable longitudinal water-blocking cable core |
Country Status (1)
| Country | Link |
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| CN (1) | CN110706869A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114783692A (en) * | 2022-05-23 | 2022-07-22 | 浙江晨光电缆股份有限公司 | Cable cabling filling material injection device and injection method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0157989A1 (en) * | 1984-03-02 | 1985-10-16 | Siemens Aktiengesellschaft | Device for filling an electrical and/or optical cable |
| CN1820929A (en) * | 2006-03-28 | 2006-08-23 | 四川爱通电子线缆制造有限责任公司 | Physical foaming method for producing electric cable |
| CN101809680A (en) * | 2007-09-25 | 2010-08-18 | 宝理塑料株式会社 | Coaxial cable |
| CN202217549U (en) * | 2011-09-28 | 2012-05-09 | 安徽省砀山兴华电缆有限公司 | Foamed insulated cable extruding machine |
| CN102470597A (en) * | 2009-07-02 | 2012-05-23 | Wpc株式会社 | Molding material for extrusion foam molding, process for producing same, woody molded foam produced from the molding material, and process and apparatus for producing the woody molded foam |
| CN102803331A (en) * | 2010-01-22 | 2012-11-28 | 路博润高级材料公司 | Crosslinkable thermoplastic polyurethane |
| CN209079160U (en) * | 2018-09-28 | 2019-07-09 | 东莞市庆丰电工机械有限公司 | A kind of chemical blowing extrusion machine host |
-
2019
- 2019-09-26 CN CN201910916531.8A patent/CN110706869A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0157989A1 (en) * | 1984-03-02 | 1985-10-16 | Siemens Aktiengesellschaft | Device for filling an electrical and/or optical cable |
| CN1820929A (en) * | 2006-03-28 | 2006-08-23 | 四川爱通电子线缆制造有限责任公司 | Physical foaming method for producing electric cable |
| CN101809680A (en) * | 2007-09-25 | 2010-08-18 | 宝理塑料株式会社 | Coaxial cable |
| CN102470597A (en) * | 2009-07-02 | 2012-05-23 | Wpc株式会社 | Molding material for extrusion foam molding, process for producing same, woody molded foam produced from the molding material, and process and apparatus for producing the woody molded foam |
| CN102803331A (en) * | 2010-01-22 | 2012-11-28 | 路博润高级材料公司 | Crosslinkable thermoplastic polyurethane |
| CN202217549U (en) * | 2011-09-28 | 2012-05-09 | 安徽省砀山兴华电缆有限公司 | Foamed insulated cable extruding machine |
| CN209079160U (en) * | 2018-09-28 | 2019-07-09 | 东莞市庆丰电工机械有限公司 | A kind of chemical blowing extrusion machine host |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114783692A (en) * | 2022-05-23 | 2022-07-22 | 浙江晨光电缆股份有限公司 | Cable cabling filling material injection device and injection method |
| CN114783692B (en) * | 2022-05-23 | 2022-11-11 | 浙江晨光电缆股份有限公司 | Cable cabling filling material injection device and injection method |
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Application publication date: 20200117 |
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