CN202102798U - Metal shield monitoring type flexible cable for coal mine - Google Patents
Metal shield monitoring type flexible cable for coal mine Download PDFInfo
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- CN202102798U CN202102798U CN2011202328760U CN201120232876U CN202102798U CN 202102798 U CN202102798 U CN 202102798U CN 2011202328760 U CN2011202328760 U CN 2011202328760U CN 201120232876 U CN201120232876 U CN 201120232876U CN 202102798 U CN202102798 U CN 202102798U
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Abstract
The utility model discloses a metal shield monitoring type flexible cable for a coal mine, which comprises three cable cores, wherein an inner sheath, an insulating tape and an outer sheath are sequentially arranged on the periphery of the three cable cores. The metal shield monitoring type flexible cable for the coal mine is characterized in that each cable core is formed by a cable core conductor, a semiconducting layer, an insulating layer and an insulation shielding layer capable of serving as a ground wire, and the semiconducting layers, the insulating layers and the insulation shielding layers capable of serving as the ground wires are arranged on the periphery of the cable core conductors in sequence. A monitoring cable core and a semiconducting tape layer are arranged between the inner sheath and the insulating tape, and the monitoring cable core is fixed on the periphery of the inner sheath through the semiconducting tape layer. The semiconducting layers are arranged on the periphery of the cable core conductors, therefore electric field distribution of the cable cores is improved, production quality is improved, the voltage class of the cable can reach 8.7/10Kv, and the section of the cable can reach 240mm2. The insulation shielding layers capable of severing as the ground wires are adopted, thereby decreasing the outer diameter and the weight of a whole finished cable and saving raw materials. The monitoring cable core matched with the ground wires in use is added, thereby greatly improving safety and reliability performance of the cable.
Description
Technical field
The utility model relates to a kind of cable, specifically is that a kind of colliery is with metallic shield monitoring type flexible cable.
Background technology
The colliery is the main cable kind under the coal mine with moving metal shielding monitoring type rubber sleeve flexible cable; Along with extractive equipment installed capacity under the coal mine constantly increases; The colliery instructions for use has been satisfied not in the electric pressure of existing product and cross section; Therefore new MT818-2009 " flame retardant cable use in the colliery " industry standard of working out is brought up to 8.7/10kV with the electric pressure of product etc., and the manufacturing cross section is 150mm to the maximum
2, but still can not satisfy colliery development instructions for use.
The neutral point of the electric power system in traditional colliery is not directly grounded.The ground core D.C. resistance of cable must satisfy relevant rules regulation.The application of protective device is not so good as the general of low-pressure system in the 10kV electric power system, after the cable single-phase earthing, often can not in time handle, and can cause that another punctures in zones of different over the ground, causes two to pass through earth short mutually.The old place core will have enough cross sections.There are electric capacity and mutual inductance between ground core and the power core, in practical application, the necessary good earth of ground core, otherwise can cause serious loss of life or personal injury.
The utility model content
In order to overcome above-mentioned deficiency, the utility model purpose is to provide good, the safe and reliable colliery of a mass with metallic shield monitoring type flexible cable.
To achieve these goals, the technical scheme below the utility model adopts:
The colliery is with metallic shield monitoring type flexible cable; Include three cores; The periphery of three cores is provided with inner sheath, insulation band and oversheath successively; It is characterized in that: each core is that the insulation screen by core conductor, semi-conductive layer, insulating barrier and intercropping ground wire constitutes, and the insulation screen of semi-conductive layer, insulating barrier and intercropping ground wire is located at the periphery of core conductor successively; Be provided with between said inner sheath and the insulation band and keep watch on core and semiconductive belting layer, will keep watch on the periphery that core is fixed on inner sheath through the semiconductive belting layer.
Said core conductor is to be made by the tin-coated copper wire harness thigh strand of many diameter 0.5mm to form.
Said semi-conductive layer is the semiconductive nylon tape.
It is the insulation compound of base-material that said insulating barrier adopts with ethylene-propylene rubber, and the thickness of insulating barrier is 5.5mm.
The insulation screen of said intercropping ground wire is to use a sectional area to be 23.33mm
2The ground core be wrapped in insulating barrier the periphery to constitute insulation screen.
Said oversheath is to be processed by chloroprene rubber material.
The beneficial effect of the utility model: since the outer periphery of core conductor semi-conductive layer; So improved the Electric Field Distribution of core; Reduce maximum field strength, reduced the gap between shielding and insulating barrier, improved the product quality of cable greatly; The electric pressure of the cable of the utility model can reach 8.7/10kV, and the cross section can reach 240mm
2Owing to adopt the insulation screen of intercropping ground wire, make whole finished cable reduce external diameter and weight, and saved raw material; Owing to set up the supervision core that is used with ground wire, for the multiple tracks safety precautions is set condition is provided, improved the safety and reliability of cable greatly; In addition, the utility model has also that fire retardancy is strong, the characteristics of energy-conserving and environment-protective.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the structural representation of the utility model.
Among the figure: 1, core conductor; 2, semi-conductive layer; 3, insulating barrier; 4, insulation screen; 5, inner sheath; 6, keep watch on core; 7, insulation band; 8, oversheath; 9, semiconductive belting layer.
Embodiment
As shown in Figure 1; The colliery is with metallic shield monitoring type flexible cable; Include three cores; The periphery of three cores is provided with inner sheath 5, insulation band 7 and oversheath 8 successively, it is characterized in that: each core is that the insulation screen 4 by core conductor 1, semi-conductive layer 2, insulating barrier 3 and intercropping ground wire constitutes, and the insulation screen 4 of semi-conductive layer 2, insulating barrier 3 and intercropping ground wire is located at the periphery of core conductor 1 successively; Be provided with between said inner sheath 5 and the insulation band 7 and keep watch on core 6 and semiconductive belting layer 9, will keep watch on the periphery that core 6 is fixed on inner sheath 5 through semiconductive belting layer 9.Said semi-conductive layer 2 is the semiconductive nylon tape.It is the insulation compound of base-material that said insulating barrier 3 adopts with ethylene-propylene rubber, and the thickness of insulating barrier is 5.5mm.
The concrete production process of each core is: be to be processed by the tin-coated copper tow strand of 1221 φ 0.50mm; Its conductor wire core surface utmost point out-of-flatness; For improving Electric Field Distribution, reduce maximum field strength, the gap between minimizing shielding and insulating barrier etc.; This developed product is first at conductor wire core outsourcing one deck semiconductive nylon tape, on φ 65 extruders, squeezes tubular type with half then semiconductive shieldin material is extruded on the core.The core of extruding from φ 65 extruders just gets into the die orifice of φ 120/ φ 90 extruders after one section cooling, extrude simultaneously through second third electro-insulating rubber and outer conducting layer, can be coated on the core tightly.Vulcanize, cool off these processes and be all the time that (1.5-2Mpa) accomplishes under pressure state, guaranteed that acetophenone, two cumic alcohol isopolarity gases that DCP (cumyl peroxide) and ethene generation cross-linking process produce are dissolved and be absorbed in the ethylene-propylene rubber medium of sulfuration under pressure.It is 23.33mm that a sectional area is twined in the periphery of the second third electro-insulating rubber layer
2The ground core to constitute insulation screen.
Operation principle: in the present design, 70mm is confirmed in the design of the total sectional area of ground core
2Use type of weave respectively on 3 master cores 1/3 of ground core total sectional area, when installing and using, be connected on the earthing device together; Both satisfied grounding requirement, and played shielding action again, whole finished cable has reduced external diameter and weight, and has saved structural material; Keep watch on core and be the colliery with the mobile peculiar requirement setting of mining rubber flexible cable of high voltage (6kV and more than); Its effect is that the ground connection core with cable constitutes monitoring circuit, with the continuous monitoring of the ground system integrity that achieves a butt joint, when cable receives external damage; When fracture takes place in the ground connection core; Cause the action of monitor protection device through the variation of monitoring circuit D.C. resistance, in time cut off the electricity supply, guarantee downhole safety.Remove this cable and keep watch on the subsidiary in addition defencive function of coaxial-type layer structure of core; Mechanical damage outside cable receives; When inner sheath is destroyed, keep watch on once and between metal knitted ground wire being short-circuited, the monitoring circuit D.C. resistance also can change; Cause action in advance under the intact situation of other parts of cable of monitor protection device, give the alarm or trip.This is the second road safety precautions.
In addition, in order to put forward the cable-flame retardant ability of doing, the oversheath base material of this cable is still used neoprene.Promptly in sheath neoprene prescription, adopt the efficient smoke-inhibiting flame retardant agent of domestic initiation, to strengthen the fire retardancy of external sheath layer.From the substance combustion three elements, promptly combustible, heat (temperature), oxygen, one of them is limited, can reach the purpose that burning can not be carried out.Finding out easily thus, make the heat of the cable that is heated or burns controlled, is the fire retardancy effective way that improves cable.No matter be which kind of flame retardant cable, desiring can be through the bunched burning test of MT-386 requirement and the burning test down of loading, and the oxygen index OI of its material therefor (weighing material difficulty combustion degree characteristic) and the structure of reasonable employing cable then are crucial.The flame retardant cable of design wants that performance is good, structure is best.Usually the OI that constitutes several kinds of combustible materials of cable is calculated the equilibrium oxygen index of cable.Then, with the fire retardancy that the averaged oxygen index of cable comes the entry evaluation cable, the cable averaged oxygen index that is calculated is high more, and the possibility of the burning test that then requires through MT-386 is just big more.But the raising of oxygen index will bring cost to increase.
When universal experience is about 31-34 by the averaged oxygen index; The oversheath oxygen index of MYPTJ will reach 34 for well; The underground mine use cable requires both soft; Mechanical force such as also will resist heavy load to dash to pound, from domestic and international research test and test application result, neoprene is only mining cable oversheath elastomeric material.
Claims (6)
1. a colliery is with metallic shield monitoring type flexible cable; Include three cores; The periphery of three cores is provided with inner sheath (5), insulation band (7) and oversheath (8) successively; It is characterized in that: each core is that the insulation screen (4) of semi-conductive layer (2), insulating barrier (3) and intercropping ground wire is located at the periphery of core conductor (1) successively by insulation screen (4) formation of core conductor (1), semi-conductive layer (2), insulating barrier (3) and intercropping ground wire; Be provided with between said inner sheath (5) and the insulation band (7) and keep watch on core (6) and semiconductive belting layer (9), will keep watch on the periphery that core (6) is fixed on inner sheath (5) through semiconductive belting layer (9).
2. colliery according to claim 1 is characterized in that with metallic shield monitoring type flexible cable: said core conductor (1) is to be made by the tin-coated copper wire harness thigh strand of many diameter 0.5mm to form.
3. colliery according to claim 1 is characterized in that with metallic shield monitoring type flexible cable: said semi-conductive layer (2) is the semiconductive nylon tape.
4. colliery according to claim 1 is characterized in that with metallic shield monitoring type flexible cable: it is the insulation compound of base-material that said insulating barrier (3) adopts with ethylene-propylene rubber, and the thickness of insulating barrier is 5.5mm.
5. colliery according to claim 1 is characterized in that with metallic shield monitoring type flexible cable: the insulation screen of said intercropping ground wire (4) is to use a sectional area to be 23.33mm
2The ground core be wrapped in insulating barrier (3) the periphery to constitute insulation screen.
6. colliery according to claim 1 is characterized in that with metallic shield monitoring type flexible cable: said oversheath (8) is to be processed by chloroprene rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202328760U CN202102798U (en) | 2011-07-04 | 2011-07-04 | Metal shield monitoring type flexible cable for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202328760U CN202102798U (en) | 2011-07-04 | 2011-07-04 | Metal shield monitoring type flexible cable for coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202102798U true CN202102798U (en) | 2012-01-04 |
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ID=45388802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202328760U Expired - Fee Related CN202102798U (en) | 2011-07-04 | 2011-07-04 | Metal shield monitoring type flexible cable for coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202102798U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568678A (en) * | 2012-03-12 | 2012-07-11 | 江苏宝安电缆有限公司 | Flame retardant monitoring and shielding mining rubber-sleeved flexible cable |
-
2011
- 2011-07-04 CN CN2011202328760U patent/CN202102798U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568678A (en) * | 2012-03-12 | 2012-07-11 | 江苏宝安电缆有限公司 | Flame retardant monitoring and shielding mining rubber-sleeved flexible 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: 20120104 Termination date: 20190704 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |