CN202003715U - Compensation cable used for silicon rubber insulated intrinsic safety system - Google Patents
Compensation cable used for silicon rubber insulated intrinsic safety system Download PDFInfo
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- CN202003715U CN202003715U CN2011200790187U CN201120079018U CN202003715U CN 202003715 U CN202003715 U CN 202003715U CN 2011200790187 U CN2011200790187 U CN 2011200790187U CN 201120079018 U CN201120079018 U CN 201120079018U CN 202003715 U CN202003715 U CN 202003715U
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- silicon rubber
- intrinsic safety
- safety system
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Abstract
The utility model discloses a compensation cable used for a silicon rubber insulated intrinsic safety system, which comprises pair twist pairs and an insulation layer, wherein each pair twist pair is formed by twisting two alloy conductors; the insulation layer covers the outer surfaces of the alloy conductors; an inner gird layer is covered outside the pair twist pairs; the inner side of the inner gird layer is stuck with two sections of opposite colored tapes; a sub-shielding layer is covered outside the inner gird layer; a plurality of pair twist pairs covered by the sub-shielding layer are mutually twisted and bundled; the outer surface of the bundled sub-shielding layer is successively covered with an outer grid layer, a total shielding layer and a jacket layer; and the sub-shielding layer and the total shielding layer are respectively provided with a drainage line. In the compensation cable, an inner grid layer and an outer grid layer are adopted, and the colored tapes are arranged at the inner side of the inner grid layer; meanwhile, two layers of shielding layers are adopted to effectively protect from external interference and improve temperature measuring precision; and in addition, the silicon rubber is used as insulation materials, so that cable softness is improved, the working temperature of the cable is improved to 180DEG C, and a voltage withstanding characteristic is improved.
Description
Technical field:
The utility model relates to the compensating cable field, relates in particular to a kind of silicon rubber insulation intrinsic safety system compensating cable.
Background technology:
In industrial processes, some environment can give out inflammable gas, steam or dust, and when it reaches finite concentration in air, running into burning things which may cause a fire disaster will set off an explosion.Along with industrial production and science and technology development, tighter to manufacturing technique requirent, require higher to automatic control system.Because the electrodynamic instrument demand is increasing, range of application is more and more wider, so in the safety anti-explosive in modern times, except that the safety anti-explosive problem to field instrument itself has proposed the more requirement of Gao Gengyan, also require to have the safety anti-explosive performance by the system that field instrument and circuit thereof are formed.Essential safe type is meant that normal operation or the spark that is produced or thermal effect all can not light the electric equipment of explosive mixture under standard test conditions, essential safe type is called for short intrinsic safety type.Constitute the necessary condition of an intrinsic safety system: (1) is in instrument energy storage in the explosive hazard environment and can produce and light spark, is intrinsic safety equipment; (2) the non-intrinsically safe circuit from harbor is sent to the hazardous area, and the energy of intrinsically-safe instrument is less than setting; (3) related cable can not be subjected to external electrical field and magnetic interference to produce non-intrinsic safety energy.
At present,, require supporting with it various products to adapt, could guarantee the long-term safety stable operation of equipment like this with the environment for use temperature in the many high temperature of industry places such as oil, chemical industry, smeltings.The employed common compensating cable in these high-temperature fields can not satisfy the requirement of environment for use, through constantly groping, verifies, develops silicon rubber insulation, sheath intrinsic safety system compensating cable, and by user's use, reflection is good.
The utility model content:
The purpose of this utility model provides a kind of silicon rubber insulation intrinsic safety system compensating cable, has solved cable because electric spark and thermal effect cause the problem of explosion hazard gases blast and cable selfcapacity and distributed inductance.
Technical scheme of the present utility model is as follows:
Silicon rubber insulation intrinsic safety system compensating cable, comprise that twisted pair wire is right, insulating barrier, described twisted pair wire constitutes being twisted together by two alloy conductors, described alloy conductor is enclosed with insulating barrier outward respectively, it is characterized in that: described twisted pair wire is to being wrapped with interior belting layer, the belting layer inboard is pasted with two sections relative colour bands in described, belting layer is wrapped with sub-shield in described, a plurality of twisted pair wires after the parcel sub-shield are to mutual stranded bunchy, sub-shield is enclosed with outer belting layer outward successively behind the bunchy, total screen, restrictive coating, described sub-shield, be respectively equipped with drainage thread in total screen.
Described silicon rubber insulation intrinsic safety system compensating cable is characterized in that: it is that sectional area is less than 0.2mm that described drainage thread adopts material
2Copper wire.
Described silicon rubber insulation intrinsic safety system compensating cable is characterized in that: it is silicon rubber that described insulating barrier, restrictive coating all adopt material.
Described silicon rubber insulation intrinsic safety system compensating cable, it is characterized in that: described sub-shield, total screen adopt the overlapping mode wrapped or vertical bag of aluminium-plastic tape to constitute, aluminium-plastic tape is by being base material with the plastic film, single or double applies aluminium powder and makes, during coating, aluminium is towards interior.
The selected material of the utility model is:
(1) alloy conductor.The intrinsic safety system compensating cable is to be used for being electrically connected between various thermocouples and the temperature display meter.Alloy silk cross section commonly used is 0.5,1.0,1.5,2.5mm
2According to different service condition requirements, the alloy conductor structure is selected for use and is met 7 bursts of structures of GB ∕ T 4990-1995 " thermocouple compensating wire alloy silk ".
(2) insulation.The insulating material that cable adopts is a silicon rubber.The working temperature of silicon rubber is 180 ℃, has very high thermal endurance, excellent cold resistance, excellent electric insulation performance, good aging properties, excellent oil resistance, and nontoxic odorless.
(3) twisted pair wire is right.Because compensating cable is used to connect thermocouple and measurement mechanism thermometric, the requirement thermometric is accurate, thermocouple is highly sensitive, so the insulated wire cores structure of compensating cable all adopts the pair twist identical with the symmetric communication cable (or symmetry) structure, promptly the insulated wire cores by a pair of different colour codes forms by pair twister is stranded.Because twisted pair wire has the coordinated transposition effect to the loop of forming, can make in the loop disturbance current cancel out each other or reduce, but intersect pitch certain cooperation to be arranged, pitch is smaller when intersecting, and then intersects better effects if.Therefore, in the pair twist process, strict control pair twist pitch, and the right pitch that will guarantee adjacent lines has nothing in common with each other and do not have the even bit relation, in case the phase mutual interference of non-return road.Twisted pair wire is discerned common employing numeral or colour band sign, tightens at its surperficial wrapped non-hygroscopic band then.
(4) shielding.Usually this cable all adopts shielding construction, and shielding construction has the branch shielding, always shields and divides shielding to add up three kinds of shieldings etc.The mode of the overlapping wrapped or vertical bag of the aluminium-plastic tape of 0.05～0.1mm is adopted in shielding.Aluminium-plastic tape is by being base material with the plastic film, and single or double applies aluminium powder and makes, and during coating, aluminium is towards interior.For the electrical continuity that guarantees to shield, and convenient installation ground connection, place the drainage thread that the multiply tinned copper wire is stranded in the screen, the drainage thread cross section is not less than 0.2mm
2The cable of aluminium-plastic tape shielding, external diameter is little, in light weight, soft, moistureproof, and shield effectiveness is good.
(5) cable element.Cable element (cable core) by each twisted pair wire to or divide shielding twisted pair wire strand to form.The twisted pair wire logarithm can be 1～61, and the preferential line of recommending is identical with the plain edition control cable to number.The cable core gap adopts halogen-free flameproof glass cordage material to fill, so that the outward appearance rounding.Band adopts fire-retardant band wrapped, and outer wrapped one or more layers band of cable core is tightened, and prevents that cable core is loose in the laid processes.
(6) sheath.According to environment for use and cable normal operating temperature, select the silicone rubber jacket material, because oversheath requires to have certain mechanical property, common silastic material mechanical property is relatively poor, especially tear resistance is poor, can not satisfy the normal mounting operation of cable,, select for use tension to tear the silicone rubber jacket material and can satisfy serviceability through test, checking.
The utility model has the advantages that:
The utility model adopts inside and outside double-deck belting layer, and interior belting layer inboard is provided with colour band, simultaneously, adopts two-layer screen, can prevent external interference effectively, improves temperature measurement accuracy; In addition, adopt silicon rubber to be insulation, improved the pliability of cable, make the working temperature of cable bring up to 180 ℃ Celsius, improve voltage-resistent characteristic simultaneously, also have very high thermal endurance, excellent cold resistance, excellent electric insulation performance, good aging properties, excellent oil resistance, and nontoxic odorless.
Description of drawings:
Fig. 1 is the utility model structural representation.
Embodiment:
Silicon rubber insulation intrinsic safety system compensating cable, comprise that twisted pair wire is to 1, insulating barrier 2, twisted pair wire is twisted together by two alloy conductors 31 and constitutes, the alloy conductor 3 outer insulating barriers 2 that are enclosed with respectively, belting layer 4 in twisted pair wire is wrapped with 1, interior belting layer 4 inboards are pasted with two sections relative colour bands 5, interior belting layer 4 is wrapped with sub-shield 6, a plurality of twisted pair wires after the parcel sub-shield 6 are to 1 mutual stranded bunchy, be enclosed with outer belting layer 7 behind the bunchy outside the sub-shield 6 successively, total screen 8, restrictive coating 9, sub-shield 6, be respectively equipped with drainage thread 10 in total screen 8, it is that sectional area is less than 0.2mm that drainage thread 10 adopts material
2Copper wire, it is silicon rubber that insulating barrier 2, restrictive coating 9 all adopt material, sub-shield 6, total screen 9 adopt the overlapping mode wrapped or vertical bag of aluminium-plastic tapes to constitute, aluminium-plastic tape is by being base material with the plastic film, single or double applies aluminium powder and makes, and during coating, aluminium is towards interior.
Claims (4)
1. silicon rubber insulation intrinsic safety system compensating cable, comprise that twisted pair wire is right, insulating barrier, described twisted pair wire constitutes being twisted together by two alloy conductors, described alloy conductor is enclosed with insulating barrier outward respectively, it is characterized in that: described twisted pair wire is to being wrapped with interior belting layer, the belting layer inboard is pasted with two sections relative colour bands in described, belting layer is wrapped with sub-shield in described, a plurality of twisted pair wires after the parcel sub-shield are to mutual stranded bunchy, sub-shield is enclosed with outer belting layer outward successively behind the bunchy, total screen, restrictive coating, described sub-shield, be respectively equipped with drainage thread in total screen.
2. silicon rubber insulation intrinsic safety system compensating cable according to claim 1 is characterized in that: it is that sectional area is less than 0.2mm that described drainage thread adopts material
2Copper wire.
3. silicon rubber insulation intrinsic safety system compensating cable according to claim 1 is characterized in that: it is silicon rubber that described insulating barrier, restrictive coating all adopt material.
4. silicon rubber insulation intrinsic safety system compensating cable according to claim 1, it is characterized in that: described sub-shield, total screen adopt the overlapping mode wrapped or vertical bag of aluminium-plastic tape to constitute, aluminium-plastic tape is by being base material with the plastic film, single or double applies aluminium powder and makes, during coating, aluminium is towards interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200790187U CN202003715U (en) | 2011-03-24 | 2011-03-24 | Compensation cable used for silicon rubber insulated intrinsic safety system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200790187U CN202003715U (en) | 2011-03-24 | 2011-03-24 | Compensation cable used for silicon rubber insulated intrinsic safety system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202003715U true CN202003715U (en) | 2011-10-05 |
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ID=44706446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200790187U Expired - Fee Related CN202003715U (en) | 2011-03-24 | 2011-03-24 | Compensation cable used for silicon rubber insulated intrinsic safety system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202003715U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871584A (en) * | 2014-02-24 | 2014-06-18 | 安徽华海特种电缆集团有限公司 | Low-smoke halogen-free K3-grade compensation cable for 1E type nuclear power station |
| CN103943202A (en) * | 2014-02-28 | 2014-07-23 | 安徽幸福电器电缆有限公司 | Antistatic and ultrahigh-voltage silicone rubber cable |
| CN112723012A (en) * | 2020-12-30 | 2021-04-30 | 江西新吉电缆有限公司 | Instrument cable of crosslinked polyethylene insulation intrinsic safety system |
-
2011
- 2011-03-24 CN CN2011200790187U patent/CN202003715U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871584A (en) * | 2014-02-24 | 2014-06-18 | 安徽华海特种电缆集团有限公司 | Low-smoke halogen-free K3-grade compensation cable for 1E type nuclear power station |
| CN103871584B (en) * | 2014-02-24 | 2016-04-27 | 安徽华海特种电缆集团有限公司 | A kind of low smoke and zero halogen 1E type used in nuclear power station K3 level compensating cable |
| CN103943202A (en) * | 2014-02-28 | 2014-07-23 | 安徽幸福电器电缆有限公司 | Antistatic and ultrahigh-voltage silicone rubber cable |
| CN112723012A (en) * | 2020-12-30 | 2021-04-30 | 江西新吉电缆有限公司 | Instrument cable of crosslinked polyethylene insulation intrinsic safety system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20130324 |