CN202352390U - Fireproof environmental-friendly variable-frequency cable - Google Patents
Fireproof environmental-friendly variable-frequency cable Download PDFInfo
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- CN202352390U CN202352390U CN2011205148308U CN201120514830U CN202352390U CN 202352390 U CN202352390 U CN 202352390U CN 2011205148308 U CN2011205148308 U CN 2011205148308U CN 201120514830 U CN201120514830 U CN 201120514830U CN 202352390 U CN202352390 U CN 202352390U
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Abstract
The utility model discloses a fireproof environmental-friendly variable-frequency cable, which sequentially comprises a cable core group, an insulating layer, a filling layer, a taping layer, a shielding layer and a halogen-free low-smoke flame-retardant polyolefin sheath layer from inside to outside. An oxygen-insulating flame-retardant layer is arranged outside the shielding layer. According to the utility model, the defects that the fireproof performance of the existing variable-frequency cable is poor and toxic dense smoke is produced are overcome. The fireproof environmental-friendly variable-frequency cable provided by the utility model has the advantages that the effect of effectively preventing fire and retarding flame can be realized, the smoke density is small and halogen-containing toxic substances are not produced.
Description
Technical field
The utility model belongs to field of cables, is specifically related to a kind of fireproof environmental type frequency-changing cable.
Background technology
Frequency control motor has very big development at home and abroad in recent years, and is because of variable-frequency motor has more advantage, few like the equipment investment expense; Simple in structure, volume is little, and cost is low; Energy-conservation, speed adjustable range is big, and is easy to use; Advantages such as capacity is big, the current application widely that obtained in industrial aspect such as metallurgy, mine, railways.Meanwhile, the requirement to frequency-changing cable under different environmental conditions is also different, from fire-fighting and fire safety; Fire protecting performance to frequency-changing cable is had higher requirement; At present, frequency-changing cable can not block effectively, delay flame spreads along cable, discharges poisonous dense smoke; Thereby cause the intensity of a fire to enlarge, human and material resources are damaged.But multiple oxygen barrier fire proofings such as relevant hydroxide, metal hydrate, glass cloth have emerged in an endless stream, if these materials are applied on the frequency-changing cable, will play effect energetically to the fire protecting performance of frequency-changing cable.
The utility model content
The technical problem that the utility model will solve is poor to frequency-changing cable fire protecting performance in the prior art, as to contain noxious substance shortcoming; A kind of effect that can effectively play fire protection flame retarding is provided; And smoke density is little, can not produce the fireproof environmental type frequency-changing cable of Halogen noxious substance.
In order to solve the problems of the technologies described above; The utility model provides following technical scheme: a kind of fireproof environmental type frequency-changing cable; Comprise cable core group, insulating barrier, packed layer, belting layer, screen and halogen-free and low-smoke flame-retardant polyolefin sheathed layer from the inside to the outside successively, screen is outside equipped with the oxygen barrier flame-retardant layer.
Adopt the frequency-changing cable of the utility model technical scheme, because screen is outside equipped with the oxygen barrier flame-retardant layer, outermost layer has halogen-free and low-smoke flame-retardant polyolefin sheathed layer, thereby has promoted the fire protection flame retarding property of frequency-changing cable greatly.When running into that the part catches fire or during high temperature; Halogen-free and low-smoke flame-retardant polyolefin material guards layer can absorb and decompose heat, the reduction system temperature that produces, thereby reaches flame retardant effect, because the smoking set that discharges has the characteristics of low concentration asepsis environment-protecting; Have certain see-through, the personnel that are beneficial to withdraw fast.When if oversheath does not have to stop flame, the outer further blocking oxygen of oxygen barrier flame-retardant layer of screen contacts knock down the flame with fire.
Further, a kind of fireproof environmental type frequency-changing cable, cable core by three core strandings or three master cores and three by-pass cores apart from one another by symmetrical stranding.Master core is bigger with respect to by-pass core cross-sectional area; The cable of the symmetrical structure that forms is because the interchangeability of lead; Better electromagnetic compatibility is arranged, play a role, can offset the strange secondary frequencies in the humorous sound wave of high order suppressing electromagnetic interference; Improve the anti-interference of frequency-changing cable, reduce the electromagnetic radiation in the whole system.
Further, a kind of fireproof environmental type frequency-changing cable, packed layer adopts the asbestos cord material.Asbestos cord has extremely fireproof property, electrical insulating property and thermal insulation, is important fire prevention, insulation and insulation material.Adopt asbestos cord as packed layer, favourable protection frequency-changing cable cable core group does not receive the invasion of extraneous flame.
Further, a kind of fireproof environmental type frequency-changing cable, screen is through copper wire braiding or the form of twining or copper strips is wrapped or the form of vertical bag constitutes, and perhaps is combined to form through the two.Screen and symmetrical cable core interact the anti-interference of frequency-changing cable is better embodied, and adopt copper wire form or copper strips form or copper wire, copper strips cooperation forms to constitute screen and be only the mode that preferably embodies.
Adopt the frequency-changing cable of the utility model technical scheme; No matter be to reach excellent effect aspect anti-interference or the fire line; Promoting the fire retardant performance that has promoted frequency-changing cable when the most important anti-interference of frequency-changing cable requires, for using frequency-changing cable to obtain due protection at special occasions.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model technical scheme is further specified:
Fig. 1 is the section structure sketch map of a kind of fireproof environmental type of the utility model frequency-changing cable embodiment.
Embodiment
As shown in Figure 1, a kind of fireproof environmental type of the utility model frequency-changing cable comprises cable core group, insulating barrier 3, packed layer 4, belting layer 5, screen 6 and halogen-free and low-smoke flame-retardant polyolefin sheathed layer 8 from the inside to the outside successively, and screen 6 is outside equipped with oxygen barrier flame-retardant layer 7.
In the specific embodiment operation; Adopt three master cores 2 and three by-pass cores 1 to form the cable core group apart from one another by symmetry, insulating barrier 3 coats master core 2 and by-pass core 1 respectively, and packed layer 4 adopts asbestos cord to be filled in fixed position between master core 2 and the by-pass core 1; Belting layer 5 coats the cable core group; Screen 6 adopts the form composition that copper wire twines and copper strips is wrapped to be coated on around the belting layer 5, and oxygen barrier flame-retardant layer 7 is coated on around the screen, and outermost layer is halogen-free and low-smoke flame-retardant polyolefin sheathed layer 8.Certainly, in the practical implementation process, if the cable core group adopts three core strandings, screen 6 adopts copper wire braiding, winding or copper strips is wrapped, the form of vertical bag constitutes, and all belongs within the protection range.When frequency-changing cable is in high temperature or the environment that sporadicly catches fire; Halogen-free and low-smoke flame-retardant polyolefin sheathed layer 8 absorbs and decomposes heat; Reach flame retardant effect, if when halogen-free and low-smoke flame-retardant polyolefin sheathed layer 8 fails to stop flame, oxygen barrier flame-retardant layer 7 blocking oxygens contact with flame; Further reach flame retardant effect, 4 assurances of packed layer cable core group is avoided external flame and is invaded and harassed.
For a person skilled in the art; Under the prerequisite that does not break away from the utility model structure; Can also make some distortion and improvement, should be regarded as the protection range of the utility model yet, these can not influence effect and practical applicability that the utility model is implemented.
Claims (4)
1. fireproof environmental type frequency-changing cable is characterized in that: comprise cable core group, insulating barrier, packed layer, belting layer, screen and halogen-free and low-smoke flame-retardant polyolefin sheathed layer from the inside to the outside successively, screen is outside equipped with the oxygen barrier flame-retardant layer.
2. a kind of fireproof environmental type frequency-changing cable as claimed in claim 1 is characterized in that: the cable core group by three core strandings or three master cores and three by-pass cores apart from one another by symmetrical stranding.
3. a kind of fireproof environmental type frequency-changing cable as claimed in claim 1 is characterized in that: packed layer adopts the asbestos cord material.
4. a kind of fireproof environmental type frequency-changing cable as claimed in claim 1 is characterized in that: screen is through copper wire braiding, winding form or copper strips is wrapped, vertical packet form constitutes, and perhaps constitutes through the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205148308U CN202352390U (en) | 2011-12-12 | 2011-12-12 | Fireproof environmental-friendly variable-frequency cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205148308U CN202352390U (en) | 2011-12-12 | 2011-12-12 | Fireproof environmental-friendly variable-frequency cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202352390U true CN202352390U (en) | 2012-07-25 |
Family
ID=46541375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205148308U Expired - Fee Related CN202352390U (en) | 2011-12-12 | 2011-12-12 | Fireproof environmental-friendly variable-frequency cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202352390U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928179A (en) * | 2013-12-06 | 2014-07-16 | 安徽凌宇电缆科技有限公司 | Low-smoke halogen-free flame-retardant aluminum alloy variable frequency cable |
-
2011
- 2011-12-12 CN CN2011205148308U patent/CN202352390U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928179A (en) * | 2013-12-06 | 2014-07-16 | 安徽凌宇电缆科技有限公司 | Low-smoke halogen-free flame-retardant aluminum alloy variable frequency cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20141212 |
|
| EXPY | Termination of patent right or utility model |