CN201622887U - Special cable for computers and instruments - Google Patents
Special cable for computers and instruments Download PDFInfo
- Publication number
- CN201622887U CN201622887U CN 201020135363 CN201020135363U CN201622887U CN 201622887 U CN201622887 U CN 201622887U CN 201020135363 CN201020135363 CN 201020135363 CN 201020135363 U CN201020135363 U CN 201020135363U CN 201622887 U CN201622887 U CN 201622887U
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- cable
- layer
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- halogen
- cable core
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- Expired - Lifetime
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- Ropes Or Cables (AREA)
Abstract
The utility model discloses a special cable for computers and instruments. The cable is characterized in that wire assembly units are formed by stranding insulating cores according to forms of a two-core group or three-core group, a lapping layer and a sub shielding layer are arranged outside each wire assembly unit, the wire assembly units are then stranded into a cable core, a filling layer is arranged among the wire assembly units, a second lapping layer, a main shielding layer, a main lapping layer and an outer sheath layer are sequentially arranged outside the cable core and the filling layer, the insulating cable core consists of conductors and insulating layers, and the insulating layers and the outer sheath layer are made of halogen-free low-smoke flame retardant polyolefin materials. The special cable for computers and instruments has high environmental protection and fire retardant properties and low-capacitance and low-induction stable signal transmission functions.
Description
Technical field:
The utility model relates to computer and instrument special cable, particularly a kind of LSOH anti-flaming environment-friendly computer cable.
Background technology:
Connections such as the signal transmission of present distributing system in industrial and mining enterprises such as electric power, metallurgy, chemical industry, electronic computer system, automated system and detecting instrument, instrument to the SHIELDING CALCULATION cable, are adopted traditional polythene insulation PVC sheath shield type computer cable with many basically.This cable has the polyethylene of superior electrical performances such as dielectric constant is little, dielectric loss is little, insulation resistance is big as insulating material, so cable has low electric capacity, inductance and stablizes good transmission performance because of employing.But along with some problems that are extensive use of of this cable also occur thereupon, it mainly is the occasion that has fire resistance at the ask for something cable, because of the insulation of this cable is adopted polythene material but polyethylene is a combustible material, and sheath adopts pvc material and polyvinyl chloride just has not flame-retarding power, so the fire resistance of cable does not often reach requirement, the potential safety hazard when causing these occasions of cable to be used increases.Sheath material for the fire resistance cable that increases cable adopted the flame-proof polyvinyl chloride material afterwards, but because pvc material contains halogen, in case when fire took place, cable is burned can to produce a large amount of smog, and also has halogen-containing poisonous corrosive gas to disengage.So not only be unfavorable for the expansion of rescue work, and halogen-containing toxic gas causes serious actual bodily harm to trapped personnel.Generally all there is accurate instrument and equipment the application scenario of computer instrument cable in addition, and these corrosive gass that contain halogen can cause serious sour corrosion to equipment.
Summary of the invention:
Use the problem that exists in order to overcome existing conventional computer instrument cable at the dangerous situation that some have fire to take place, the purpose of this utility model is to provide a kind of and has high environmental-protecting performance and high flame resistance, and has the computer and the instrument special cable of the stabilization signal transfer function of low electric capacity, low inductance.
The utility model technical solution problem adopts following technical scheme:
Computer and instrument special cable, form line group unit by insulated wire cores by two line groups or three-way group of pair twist, online group of unit is outside equipped with belting layer and sub-shield, line group unit is twisted into cable core again, and packed layer is set between cable core, cable core and packed layer are disposed with second belting layer, total screen, overall budget belt and external sheath layer outward, and described insulated wire cores is made of conductor and insulating barrier, and described insulating barrier and external sheath layer all adopt the halogen-free and low-smoke flame-retardant polyolefin material to make.
Described packed layer is a low smoke, zero halogen glass rope.
Described second belting layer and overall budget belt are the LSOH anti-flaming glass fibre belt.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
The insulating barrier of cable adopts novel environment friendly halogen-free and low-smoke flame-retardant polyolefin Insulation Material, and this material is that polyethylene is that base material adds the ep-type material that inorganic combustion inhibitor is made.This material is compared with common polythene, and electric property is more or less the same, and guarantees that cable has stable signal transfer functions, but aspect fire resistance owing to added inorganic combustion inhibitor, so fire resistance is improved, and the amount of being fuming is low when burning, does not have the corrosive gas that contains halogen and disengages.The sheath material of cable adopts the halogen-free and low-smoke flame-retardant polyolefin sheathed material of novel environment-friendly.This material has taken into full account the Halogen of cable, low cigarette, fire resistance, and to adopt polyolefin be base material, and fire retardant adopting halogen flame retardant, is not a fire retardant and adopt metal oxide.Not only have good flame retardant property, and when burning the amount of being fuming low, disengage gas and be mainly water and carbon dioxide, to personnel and equipment do not have illeffects on every side.The auxiliary packed layer of cable and band material are to adopt halogen-free flameproof glass fiber material, not only have good flame retardant property, and all are not halogen-containing environment-friendly materials.The utility model computer and instrument special cable also have low electric capacity, low inductance, stable signal transfer functions when having high flame retardant, Halogen, low cigarette environmental-protecting performance.The fire resistance of cable reaches the bunchy category-A burning test of GB/T18380 regulation, the low smoke performance of cable is according to the experimental condition of GB/T17651 regulation, its light transmittance is not less than 60%, the Halogen performance of cable is according to the experimental condition of GB/T17650, pH value is greater than 4.3, and conductance is less than 10 μ s/mm.Be not more than 90pF/m during the mutual capacitance 1kHZ of cable, the inductance resistance ratio is not more than 35 μ H/ Ω.In a word, this utility model product is a kind ofly will hang down the new product that cigarette, Halogen, environmental-protecting performance such as fire-retardant and good stable signal transfer functions are integrated in one, and vast market prospect is arranged.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Number in the figure: 1 conductor, 2 insulating barriers, 3 belting layers, 4 sub-shields, 5 packed layers, 6 halogen-free flame-retardant glass fiber bands, 7 total screens, 8 overall budget belts, 9 external sheath layers.
Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.
Embodiment:
Embodiment: shown in Figure 1, described computer of present embodiment and instrument special cable, conductor 1 adopts the multiply soft copper tow compositing conducting core of the 5th class formation, the following step of conductor production process: wire drawing-annealing-synnema, the form that conductor adopts bundle to close, wherein 1mm
2With monofilament maximum gauge in the lower conductor is 0.21mm, 1.5-2.5mm
2The monofilament maximum gauge is 0.26mm in the conductor.Insulating barrier 2 adopts the halogen-free and low-smoke flame-retardant polyolefin Insulation Material, its production process is produced on the SJ45 plastic extruding machine and is finished, adopt tubular molding tool to extrude, its extrusion temperature is according to the difference of warm area and different, body temperature is controlled at 120 ± 10 ℃, and head temperature is controlled at 150 ± 5 ℃, and die temperature is controlled at 140 ± 5 ℃, can carry out suitable adjustment according to extrusion equipment and material different, differ 5～10 ℃ in winter and summer.Belting layer 3 adopts the halogen-free flame-retardant glass fiber band, and production form adopts overlapping wrapped, and the rate of putting up is not less than 15%, and the twisted pair wire group is tightened in main effect.The production process of copper wire braiding sub-shield 4 is finished on 16 ingot braiding machines, and braiding angle generally is controlled between 30～60 degree, by regulating braiding angle or lay of braiding count is controlled at more than 80%.Packed layer 5 adopts the halogen-free flame-retardant glass towline, and main effect guarantees the fire resistance and the rounding property of cable.Second belting layer 6 adopts the halogen-free flame-retardant glass fiber band, and production form adopts overlapping wrapped, and the rate of putting up is not less than 15%, and main effect is tightened becoming cable core.Copper wire weaves the production process of total screen 7 and finishes on braiding machine, wherein the core external diameter is generally finished on 16 ingot braiding machines below the 6.5mm before the braiding, diameter is generally finished on 24 ingot braiding machines more than 6.5～22.0mm, and diameter is generally finished on 32 or 36 ingot braiding machines more than the 22.0mm.Braiding angle generally is controlled between 30～60 degree, by regulating braiding angle or lay of braiding count is controlled at more than 80%.Overall budget belt 8 adopts the halogen-free flame-retardant glass fiber band, and production form adopts overlapping wrapped, and the rate of putting up is not less than 15%, and total shielding and outer jacket are isolated in main effect.External sheath layer 9 adopts halogen-free and low-smoke flame-retardant polyolefin sheathed layer, also adopt tubular molding tool to extrude, extrusion temperature is according to the difference of warm area and different, body temperature is controlled at 115 ± 10 ℃, head temperature is controlled at 140 ± 10 ℃, die temperature is controlled at 130 ± 5 ℃, can carry out suitable adjustment according to extrusion equipment and material different, differs 5～10 ℃ in winter and summer.Production equipment can adopt different sheath extruders to produce according to the size of the outside diameter of cable: the use SJ45 extruder of external diameter below 15mm, use SJ65 or the SJ90 extruder of external diameter more than 15mm.
Claims (3)
1. computer and instrument special cable, form line group unit by insulated wire cores by two line groups or three-way group of pair twist, online group of unit is outside equipped with belting layer (3) and sub-shield (4), line group unit is twisted into cable core again, and packed layer (5) is set between cable core, outer second belting layer (6) that is disposed with of cable core and packed layer (5), total screen (7), overall budget belt (8) and external sheath layer (9), described insulated wire cores is made of conductor (1) and insulating barrier (2), it is characterized in that described insulating barrier (2) and external sheath layer (9) all adopt the halogen-free and low-smoke flame-retardant polyolefin material to make.
2. computer according to claim 1 and instrument special cable is characterized in that, described packed layer (5) is a low smoke, zero halogen glass rope.
3. computer according to claim 1 and instrument special cable is characterized in that, described second belting layer (6) and overall budget belt (8) are the LSOH anti-flaming glass fibre belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020135363 CN201622887U (en) | 2010-03-17 | 2010-03-17 | Special cable for computers and instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020135363 CN201622887U (en) | 2010-03-17 | 2010-03-17 | Special cable for computers and instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201622887U true CN201622887U (en) | 2010-11-03 |
Family
ID=43026343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020135363 Expired - Lifetime CN201622887U (en) | 2010-03-17 | 2010-03-17 | Special cable for computers and instruments |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201622887U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881362B (en) * | 2011-07-15 | 2016-12-21 | 上海朗达电缆（集团）有限公司 | A kind of environment-friendlycopper-aluminum copper-aluminum composite cable and manufacture method |
-
2010
- 2010-03-17 CN CN 201020135363 patent/CN201622887U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881362B (en) * | 2011-07-15 | 2016-12-21 | 上海朗达电缆（集团）有限公司 | A kind of environment-friendlycopper-aluminum copper-aluminum composite cable and manufacture method |
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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 |
Granted publication date: 20101103 |
|
| CX01 | Expiry of patent term |