CN209515295U - A kind of anti-interference frequency conversion high voltage power cable of compact - Google Patents

Abstract

It includes that insulated wire cores, reflux wire core, speed feedback core, band, six metal screen layer, oversheath parts form that the utility model, which discloses a kind of anti-interference frequency conversion high voltage power cable of compact,.Wherein insulated wire cores are circular configuration, from inside to outside respectively conductor, conductor shielding, insulation, insulation shielding, copper strip shielding；The wire core that flows back is fan-shaped bare conductor structure；Speed feedback core is circular configuration, from inside to outside respectively optical fiber, factice for filling, Loose tube；Structure innovation effect is: reducing the outside diameter of cable of frequency-changing cable 3+3 symmetrical structure, accomplishes compact-sized, reduces the laying installation space of cable；Using the output of frequency conversion electric power and motor speed feed back input share one line road, material and path spacing are reduced；Cabling power output, speed feedback input use photoelectric isolation technology, solve electromagnetic interference problem.

Description

A kind of anti-interference frequency conversion high voltage power cable of compact

Technical field

The utility model relates to a kind of anti-interference frequency conversion high voltage power cables of compact, and it is tight to be especially to provide a kind of structure It gathers, outer diameter is small；It is exported with frequency conversion electric power, constantly speed feedback input does not interfere with each other the comprehensive power cable of total transmission function.

Background technique

High-pressure frequency-conversion motor uses the exchange tune of " special high-pressure variable frequency induction motor+high voltage frequency conversion cable+frequency converter " Fast mode greatly improves mechanical automation degree and production efficiency, and device miniaturization increases comfort, positive at present to replace biography The mechanical speed governors and DC speed regulation scheme of system；Industrial automation, intelligent requirements mechanized equipment have intelligence, controllable quantization dynamic Make ability, this just needs variable-frequency motor to provide accurate, controllable power；High-pressure frequency-conversion motor in practical engineering applications, due to High-pressure frequency-conversion electric power is needed to provide and constantly velocity feedback, common electric power and signal transmission medium are high voltage power cable and weak Electric signal transmission cable；Due to being all the transmission of electricity, it will cause to interfere with each other and ultimately cause the out of control of high-voltage motor revolving speed；Mesh The mode that preceding public technology is taken is: (1) high-pressure frequency-conversion power transmission cable is adopted using insulated wire cores and reflux ground connection core With circular configuration, size core arranged adjacent forms 3+3 symmetrical structure；(2) high-pressure frequency-conversion motor speed feedback is equally using weak Electric signal transmission, high-pressure frequency-conversion electric power separately lays its electromagnetic interference using two lines road in order to prevent；Above two side The problem of formula is brought is: (1) insulated wire cores and reflux ground connection core are all made of circular configuration and 3+3 symmetric arrays will increase cable Outer diameter, waste the laying installation space of cable；(2) high-pressure frequency-conversion power transmission cable and motor speed feedback transmission cable point Open material and installation cost that laying equally increases laying space and two lines road；Above-mentioned well-known technique has CN201721322040.3 " Electric Traction medium voltage converter cable ".

Summary of the invention

Regarding to the issue above and defect, the utility model provides a kind of compact-sized, and outer diameter is small；It is defeated with frequency conversion electric power Out, constantly speed feedback input does not interfere with each other the comprehensive power cable of total transmission function.

The technical solution of the utility model is: a kind of anti-interference frequency conversion high voltage power cable of compact by insulated wire cores, return Flow six wire core, speed feedback core, band, metal screen layer, oversheath part compositions；The insulated wire cores, reflux ground Core is symmetrical arranged adjacent；Speed feedback core heart position in the cable.

The insulated wire cores are circular configuration, are used for transmission the electric power of change frequency needed for variable-frequency motor；Structure by it is interior to It is outside conductor, conductor shielding, insulation, insulation shielding, five part of copper strip shielding composition, conductor is multifilament lay configuration；Electricity Three insulated wire cores of cable arrange mutual tangency location, it is ensured that the outside diameter of cable does not increase, between insulated wire cores not there are gap and Space.

The reflux wire core is fan-shaped bare conductor structure, and conductor twists merga pass pinch roller using multifilament and presses into fan Shape structure, adjacent two piece insulated wire cores arrangement of the outer dimension just with cable is mutual tangency location, with copper strip shielding Keep electrical connection.

The covering of the fan of the reflux wire core sector structure and fan side are cambered surface, the covering of the fan arc radius and electricity of the wire core that flows back Cable stranding radius it is equivalent and formed with band it is interior tangent, the fan side arc radius and insulated wire cores radius for the wire core that flows back it is equivalent and with The copper strip shielding of adjacent two insulated wire cores forms outer tangent.

The speed feedback core uses optical transmission medium, changes the prior art and uses electric signal transmission mode, in this way may be used The electromagnetic interference problem of effective solution electric signal transmission；Speed feedback core be circular configuration, from inside to outside respectively optical fiber, Factice for filling, Loose tube.

The optical fiber is more root knot structures, and optical fiber is bent placement in Loose tube, is around full of factice for filling；Such structure Setting is that there are remaining length in Loose tube in order to ensure optical fiber, and by ointment come while fixation, ointment is covered to optical fiber in pine Sliding provides lubrication in pipe；Such structure designed for solve because during cable bend to fiber-draw, more than optical fiber Length provides stretch compensation without being pulled off.

Compared with prior art, the innovation effect of the utility model is: (1) reducing high voltage frequency conversion cable 3+3 symmetrical junction The outside diameter of cable of structure, accomplishes compact-sized, reduces the laying installation space of cable；(2) using the output of high-pressure frequency-conversion electric power and electricity Machine speed feedback inputs share one line road, reduces material and path spacing；(3) output of cable high-pressure frequency-conversion electric power is anti-with revolving speed Feedback input uses photoelectric isolation technology, solves electromagnetic interference problem.

Detailed description of the invention

In order to make the content of the utility model be easier to be clearly understood, below according to specific example with reference The utility model is described in further detail, in which:

Fig. 1 is the structural schematic diagram of the utility model.

Numbering in the drawing are as follows: insulated wire cores 1, conductor 11, conductor shielding 12, insulation 13, insulation shielding 14, copper strip shielding 15, flow back ground wire 2, feedback core 3, optical fiber 31, factice for filling 32, Loose tube 33, band 4, metallic shield 5, oversheath 6.

Specific embodiment

See Fig. 1, a kind of this anti-interference frequency conversion high voltage power cable of compact includes insulated wire cores 1, reflux wire core 2, turns 6 six speed feedback core 3, band 4, metal screen layer 5, oversheath parts form.

Insulated wire cores 1 be circular configuration, from inside to outside respectively conductor 11, conductor shielding 12, insulation 13, insulation shielding 14, copper strip shielding 15, conductor 11, which is that multifilament is twisted, presses circular configuration.

The wire core 2 that flows back is fan-shaped bare conductor structure, twists merga pass pinch roller using multifilament and presses into sector structure.

The covering of the fan for 2 sector structure of wire core that flows back and fan side are cambered surface, the covering of the fan arc radius and cable of the wire core 2 that flows back Stranding radius is equivalent and interior tangent, the fan side arc radius and insulated wire cores of the wire core 2 that flows back can be formed with band 4 after ensuring stranding 1 radius is equivalent and ensures to be formed with the copper strip shielding 15 of adjacent two insulated wire cores 1 after stranding outer tangent.

Speed feedback core 3 is circular configuration, from inside to outside respectively optical fiber 31, factice for filling 32, Loose tube 33；Optical fiber 31 be more root knot structures, and optical fiber 31 is bent placement in Loose tube 33, is around full of factice for filling 32；Such structure setting be for Ensuring optical fiber 31, there are remaining length in Loose tube 33, and by ointment 32 come while fixation, ointment 32 is to optical fiber 31 in pine Sliding provides lubrication in casing 33.

Three insulated wire cores 1 and three reflux wire cores 2 are according to 3+3 arrangement stranding, wherein three insulated wire cores 1 are used and moved back Unwrapping wire is turned round, three reflux wire cores 2 use non-back twist unwrapping wire；Core is arranged according to 3+3 after stranding, and two of reflux wire core 2 The copper strip shielding 15 of fan side cambered surface and adjacent two insulated wire cores 1 forms outer arranged tangential, the covering of the fan cambered surface for the wire core 2 that flows back with The band 4 of cable forms interior tangent, and three root insulated wire cores 1 mutually form outer tangent structure；Speed feedback core 3 is in stranding It is directly dragged to the tangent intermediate gaps position of Yu Sangen insulated wire cores 1 in the process.

Working principle: as shown in Figure 1, high-pressure frequency-conversion electric power from frequency converter by three insulated wire cores 1 of cable to high pressure Variable-frequency motor transmission provides electric power；The reflux electric power formed in high-pressure frequency-conversion motor operation course passes through three symmetrical reflux ground Core 2 is transmitted back to frequency converter；And weak electric signal is converted by the revolving speed of high-pressure frequency-conversion motor by sensor and photoelectric converter Optical signal, and frequency converter is transferred to by the optical fiber 31 of the speed feedback core 3 of high voltage frequency conversion cable and carries out output high-tension electricity The adjustment of frequency, to reach required precise and stable revolving speed；In transmission process, high voltage power transmission and speed feedback signal Transmission is total to transferring technology using non-interfering Phototube Coupling, and it is unstable to avoid the control of revolving speed caused by electromagnetic interference well Determine problem；High voltage frequency conversion cable use structure as shown in Figure 1, accomplish it is compact-sized, the outside diameter of cable reduce, save electricity well The laying installation space of cable, meets automation and intelligentification cabling requirement.

Above-described specific example has carried out further the purpose of this utility model, technical scheme and beneficial effects It is described in detail, will be understood by, the foregoing is merely the specific example of the utility model, it is practical new to be not limited to this Type, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should be included in this Within the scope of utility model protection.

Claims (4)

1. a kind of anti-interference frequency conversion high voltage power cable of compact, it is characterised in that: including insulated wire cores (1), reflux wire core (2), (6) six speed feedback core (3), band (4), metal screen layer (5), oversheath parts form；The insulated wire cores (1), reflux wire core (2) is symmetrical arranged adjacent；The speed feedback core (3) heart position in the cable.

2. the anti-interference frequency conversion high voltage power cable of a kind of compact according to claim 1, it is characterised in that: the insulation Core (1) be circular configuration, from inside to outside respectively conductor (11), conductor shielding (12), insulation (13), insulation shielding (14), Copper strip shielding (15), three insulated wire cores (1) of cable arrange mutual tangency location.

3. the anti-interference frequency conversion high voltage power cable of a kind of compact according to claim 1, it is characterised in that: the reflux Wire core (2) is fan-shaped bare conductor structure, and three insulated wire cores (1) of cable, three reflux wire core (2) arrangements are mutually mutual Cut position；The covering of the fan of described reflux wire core (2) sector structure and fan side are cambered surface, the covering of the fan arc half of reflux wire core (2) Diameter is equivalent with cable cabling radius and interior tangent, the fan side arc radius and insulated wire cores of reflux wire core (2) are formed with band (4) (1) radius is equivalent and outer tangent with the formation of the copper strip shielding (15) of adjacent two insulated wire cores (1), keeps with copper strip shielding (15) Contact electrical connection.

4. the anti-interference frequency conversion high voltage power cable of a kind of compact according to claim 1, it is characterised in that: the revolving speed Feeding back core (3) is circular configuration, from inside to outside respectively optical fiber (31), factice for filling (32), Loose tube (33)；The optical fiber It (31) is more root knot structures.