CN203881984U - Optical unit - Google Patents
Optical unit Download PDFInfo
- Publication number
- CN203881984U CN203881984U CN201420235007.7U CN201420235007U CN203881984U CN 203881984 U CN203881984 U CN 203881984U CN 201420235007 U CN201420235007 U CN 201420235007U CN 203881984 U CN203881984 U CN 203881984U
- Authority
- CN
- China
- Prior art keywords
- pbt
- tube
- sheath
- optical fiber
- harnessing
- 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.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 title abstract 4
- 239000013307 optical fiber Substances 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 5
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 5
- 239000006071 cream Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 11
- 230000005693 optoelectronics Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004760 aramid Substances 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses an optical unit which comprises optical fibers, a PBT harnessing tube and a protection sleeve. The PBT harnessing tube is wrapped on the peripheries of the optical fibers. A space between the optical fibers and the PBT harnessing tube is filled with a water resistance fiber paste. The protection sleeve is extruded and wrapped on the periphery of the PBT harnessing tube. Two high-tensile steel wires are placed inside the protection sleeve symmetrically in a parallel manner. The protection sleeve t is made of high density polyethylene. The optical unit is advantaged by good temperature characteristic and water resistance performance, small diameter, simple structure, economical and practical properties, and capability of meeting requirements of a photoelectric combined cable for the diameter of the optical unit.
Description
Technical field
The utility model relates to land optoelectronic composite cable, relates in particular to a kind of smooth unit.
Background technology
At present; known land optoelectronic composite cable makes to consider mechanical fiber optic protection and block-water performance requirement with light unit; conventionally have optical fiber, fine cream, PBT beam tube, sheath and tensile elements, tensile elements is generally FRP(fibre reinforced plastics) or the nonmetallic materials such as aramid yarn.In these materials, their linear expansion coefficient, sectional area, tensile modulus are different, along with temperature variation, the linear expansion coefficient of plastics (PBT beam tube and sheath) is large, flexible aggravation, and as FRP or the aramid yarn of tensile elements, although linear expansion coefficient is little, but due to softness, can change along with the flexible of plastics, and the linear expansion coefficient of optical fiber is minimum, vary with temperature hardly and stretch, like this, along with temperature variation, the flexible of plastics will produce stress to optical fiber, optical fiber attenuation increases, affect optical fiber communication, when serious, can cause disconnected fine.And the change of temperature be in optoelectronic composite cable along with the variation of transmitting electric load or the variation of environment temperature institute inevitably.
Therefore, be badly in need of a kind of improved technology and solve existing this problem in prior art.
Utility model content
In order to overcome optical fiber in existing optoelectronic composite cable, along with temperature variation, be subject to the effect of stress, optical fiber attenuation increases, and affects optical fiber communication, when serious, can cause disconnected fine not enough phenomenon, the utility model provides a kind of simple and practical land to stop optoelectronic composite cable light unit.
The technical solution adopted in the utility model is:
A smooth unit, comprises optical fiber, PBT beam tube and sheath, and described PBT beam tube is coated on optical fiber periphery, between described optical fiber and PBT beam tube, is filled with the fine cream that blocks water, and described sheath extrudes in PBT beam tube peripheral, in described sheath, is placed with high-tensile steel wires.
Described sheath is high density polyethylene.
The quantity of described high-tensile steel wires is two, and symmetrical parallel is positioned in sheath.
The utility model has the advantages that: good temp characteristic, block-water performance is good, and diameter is little, is applicable to the requirement of optoelectronic composite cable to light element diameter, simple in structure, economical and practical.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Wherein: 1, optical fiber, 2, the fine cream that blocks water, 3, PBT beam tube, 4, high-tensile steel wires, 5, sheath.
Embodiment
As shown in Figure 1, a kind of smooth unit of the present utility model, comprise optical fiber 1, PBT beam tube 3 and sheath 5, described PBT beam tube 3 is coated on optical fiber 1 periphery, is filled with the fine cream 2 that blocks water between described optical fiber 1 and PBT beam tube 3, and described sheath 5 extrudes in PBT beam tube 3 peripheries, in described sheath 5, be placed with high-tensile steel wires 4, the quantity of described high-tensile steel wires 4 is two, and symmetrical parallel is positioned in sheath 5, and described sheath 5 is high density polyethylene.Smooth cell temperature characteristic of the present utility model is good, and block-water performance is good, and diameter is little, is applicable to the requirement of optoelectronic composite cable to light element diameter, simple in structure, economical and practical.
The high density polyethylene extruding can solve optoelectronic composite cable in end light unit from composite rope the protection problem to light unit after separation, the fine cream 2 that blocks water in PBT beam tube 3 can play longitudinal water-blocking effect, two high-tensile steel wires 4 of parallel placement provide the effect of stretching resistance to light unit with optoelectronic composite cable is separated in end light unit afterwards except the effect that can protect light unit in composite rope is produced, light unit to avoid pulling force, main is because the linear expansion coefficient of high-tensile steel wires 4 is little, and be rigidity, during temperature variation, steel wire is flexible hardly, although the linear expansion coefficient of plastics (PBT beam tube 3 and sheath 5) is large, but owing to being subject to being the effect that involves of the high-tensile steel wires 4 that rigidity and linear expansion coefficient are little, the flexible hardly of light unit, vary with temperature so hardly and flexible optical fiber 1 can not be subject to the effect of stress.
Claims (3)
1. a light unit, it is characterized in that: comprise optical fiber, PBT beam tube and sheath, described PBT beam tube is coated on optical fiber periphery, between described optical fiber and PBT beam tube, is filled with the fine cream that blocks water, described sheath extrudes in PBT beam tube peripheral, in described sheath, is placed with high-tensile steel wires.
2. a kind of smooth unit according to claim 1, is characterized in that: described sheath is high density polyethylene.
3. a kind of smooth unit according to claim 1, is characterized in that: the quantity of described high-tensile steel wires is two, and symmetrical parallel is positioned in sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235007.7U CN203881984U (en) | 2014-05-09 | 2014-05-09 | Optical unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235007.7U CN203881984U (en) | 2014-05-09 | 2014-05-09 | Optical unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881984U true CN203881984U (en) | 2014-10-15 |
Family
ID=51682468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420235007.7U Expired - Lifetime CN203881984U (en) | 2014-05-09 | 2014-05-09 | Optical unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203881984U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955039A (en) * | 2014-05-09 | 2014-07-30 | 江苏通光强能输电线科技有限公司 | Optical unit |
-
2014
- 2014-05-09 CN CN201420235007.7U patent/CN203881984U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955039A (en) * | 2014-05-09 | 2014-07-30 | 江苏通光强能输电线科技有限公司 | Optical unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141015 |