CN202003709U - Multifunctional environmental protection frequency-changing cable - Google Patents

Abstract

The utility model relates to a multifunctional environmental protection frequency-changing cable which includes a cable core. The cable core is formed by twisting a plurality of insulated cores. Each insulated core is provided with a woven shield. The cable core is coated with a flame retardant belting layer, an inner sheath, a concentric conductor, and an oversheath in turn. The concentric conductor is a copper wire which is sparsely wound outside the inner sheath or a copper strip which is lapped outside the inner sheath. The multifunctional environmental protection frequency-changing cable provided by the utility model has excellent shielding effect, power supply quality, and anti-interference capability, does not generate electromagnetic interferences to the outside, and can effectively ensure safety when a fault occurs.

Description

The multi-functional environment-protection frequency-changing cable

Technical field

The utility model relates to a kind of frequency-changing cable, especially a kind of multi-functional environment-protection frequency-changing cable.

Background technology

Converter technique is used widely at electromechanics and every profession and trade, employed frequency-changing cable consumption is increasing in frequency conversion dynamic transfer system and the distribution line, the frequency-changing cable of Xiao Shouing mainly contains common frequency-changing cable, fire-retardant frequency-changing cable, anticorrosion frequency-changing cable etc. in the market, the main performance of these frequency-changing cables is single, can not be adapted to the occasion of multinomial security performance, occasions such as (public) place that the crowd is dense such as metallurgy, petrochemical industry, subway, market and automatically controlled facility frequency conversion circuit for example, safe operation that can not assurance device.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of multi-functional environment-protection frequency-changing cable, and shield effectiveness is good, can not produce electromagnetic interference to external world, have good power supply quality and anti-interference, can effectively ensure safety during fault.

For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of multi-functional environment-protection frequency-changing cable, comprise cable core, cable core is by stranded the forming of many eradications edge core, each insulated wire cores is provided with woven shield, is enclosed with fire-retardant belting layer, inner sheath, concentric conductor and oversheath outside cable core successively.

Concentric conductor is for dredging copper wire or the wrapped copper strips outside inner sheath outside inner sheath.

The quantity of insulated wire cores is 6, is made up of three big three little insulated wire cores of symmetry.

Each insulated wire cores comprises conductor and insulating barrier from inside to outside.

Insulating barrier is a polyolefin insulation layer.

Oversheath is the polyolefin jacket layer.

The multi-functional environment-protection frequency-changing cable that the utility model provides, beneficial effect is as follows:

1, utilize concentric conductor to have the function of shielding simultaneously, adopt each insulated wire cores to establish the dual shield structure of woven shield and cable core parcel concentric conductor, can either antistaticly be coupled, electromagnetic induction and electromagnetic wave, can reduce or avoid interference each other in the supply line again, shield effectiveness is good, simultaneously, when zero sequence or higher harmonic current component appearred in circuit, the electric current total amount in the concentric conductor was zero, does not produce electromagnetic interference to external world.

2, have even and lower phase line impedence, compare, improved the quality of power supply greatly with common frequency-changing cable.

When 3, using, concentric conductor is an earth connection, and inductive reactance is minimum, in case cable helps the startup that equipment is protected in short circuit automatically when breaking down, can effectively ensure the safety of cable and other relevant device.

4, the dual shield structure makes and disturbs the antidamping ratio to reach more than the 100Bb, thereby has guaranteed that extraneous any interference does not exert an influence to system.

5, insulating barrier and oversheath adopt polyolefin, have the performance of protection against rodents, termite-proof, antiultraviolet, low smoke and zero halogen.

6, insulated wire cores adopts the structure of three big three little insulated wire cores of symmetry, can effectively prevent the imbalance of electromagnetic coupled and phase place.

7, this practically has a multinomial function, and is applied widely, is specially adapted to the places that the crowd is dense such as subway, metallurgy, petrochemical industry, market.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is a structural representation of the present utility model.

Embodiment

As shown in Figure 1, the utility model comprises cable core, and cable core is by stranded the forming of many eradications edge core, and each insulated wire cores is provided with woven shield 3, is enclosed with fire-retardant belting layer 4, inner sheath 5, concentric conductor 6 and oversheath 7 outside cable core successively.

Concentric conductor 6 is for dredging copper wire or the wrapped copper strips outside inner sheath outside inner sheath.

The quantity of insulated wire cores is 6, is made up of three big three little insulated wire cores of symmetry.

Each insulated wire cores comprises conductor 1 and insulating barrier 2 from inside to outside.

Insulating barrier 2 is a polyolefin insulation layer.

Oversheath 7 is the polyolefin jacket layer.

Manufacturing process flow of the present utility model is as follows:

Wire drawing → annealing → twisted wire (bunch) → (extruding) insulating barrier 2 → woven shield, 3 → stranding (band) → (extruding) inner sheath 5 → wrapped concentric conductor 6 → (extruding) oversheath 7 → packing (warehouse-in).

Claims (7)

1. multi-functional environment-protection frequency-changing cable, comprise cable core, cable core is by stranded the forming of many eradications edge core, each insulated wire cores is provided with woven shield (3), it is characterized in that: be enclosed with fire-retardant belting layer (4), inner sheath (5), concentric conductor (6) and oversheath (7) outside cable core successively.

2. multi-functional environment-protection frequency-changing cable according to claim 1 is characterized in that: concentric conductor (6) is for dredging the copper wire outside inner sheath (5).

3. multi-functional environment-protection frequency-changing cable according to claim 1 is characterized in that: concentric conductor (6) is wrapped copper strips outside inner sheath (5).

4. multi-functional environment-protection frequency-changing cable according to claim 1 is characterized in that: the quantity of insulated wire cores is 6, is made up of three big three little insulated wire cores of symmetry.

5. multi-functional environment-protection frequency-changing cable according to claim 4 is characterized in that: each insulated wire cores comprises conductor (1) and insulating barrier (2) from inside to outside.

6. multi-functional environment-protection frequency-changing cable according to claim 5 is characterized in that: insulating barrier (2) is a polyolefin insulation layer.

7. multi-functional environment-protection frequency-changing cable according to claim 1 is characterized in that: oversheath (7) is the polyolefin jacket layer.

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