CN210378584U - Special frequency converter power cable for coal mining machine - Google Patents
Special frequency converter power cable for coal mining machine Download PDFInfo
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- CN210378584U CN210378584U CN201921447244.9U CN201921447244U CN210378584U CN 210378584 U CN210378584 U CN 210378584U CN 201921447244 U CN201921447244 U CN 201921447244U CN 210378584 U CN210378584 U CN 210378584U
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Abstract
The utility model discloses a special frequency converter power cable for coal mining machine, which comprises a main body lead, a grounding wire and a control wire, wherein the grounding wire and the control wire form a functional cable, and the functional cable and the main body lead are arranged at intervals and are twisted into a cable core; the outer side of the cable core is wrapped with a flame-retardant sheath. The utility model provides a special frequency converter power cable for coal mining machine, the roundness of the cable core is high, and the stability of the cable when bending can be ensured; the cable has excellent mechanical performance and good elasticity and flame retardant property.
Description
Technical Field
The utility model belongs to the technical field of the cable and specifically relates to a special converter power cable of coal-winning machine is related to.
Background
With the development of society and the progress of science and technology, frequency converters are developed rapidly in recent years due to energy conservation and are widely applied. However, harmonic signals generated by the frequency converter working inconsistent with the normal power supply frequency can be fed back to the power supply network to influence the power quality, and even damage can be caused to the electric appliance. To avoid such problems, it is generally required to use a shielded cable as a power cable of the frequency converter.
The existing cable structure special for the frequency converter is as follows: the conductor adopts a second type of compact conductor; the insulating material is polyvinyl chloride or polyethylene; the shielding layer is of a copper strip wrapping or copper wire weaving structure outside the cable core; the sheath is polyvinyl chloride. The existing variable frequency cable product cannot meet the requirements of occasions with soft installation requirements and high flame retardant performance requirements, such as mine underground mobile application occasions like mineral exploitation and the like.
Chinese patent application publication No. CN203746527U, the publication date is 2014 07 month 30 days, entitled "oil-proof, waterproof, and corrosion-resistant double-shielded control cable for coal mine", and discloses an oil-proof, waterproof, and corrosion-resistant double-shielded control cable for coal mine, which comprises a main cable core, a control cable core, a belting layer, an insulating layer, a shielding layer, a waterproof layer, and a protective sleeve, wherein the belting layer is provided with an inner shielding layer between the insulating layer, the inner shielding layer is formed by weaving nickel-plated copper-aluminum alloy wires and silicon rubber around, the shielding layer is wrapped with a heat insulating layer between the shielding layer and the waterproof layer, the ground wire core is wrapped with the heat insulating layer, and the control cable core is wrapped with a butyronitrile sheath outside the steel wire with an anticorrosive agent. However, in this patent, many main core parcels in same shielding layer, and the control line setting is outside the shielded wire, can't shield external interference, and because many main core settings are wrapped up by same shielding layer at the centremost, lead to its scope of buckling to be limited.
Disclosure of Invention
The utility model provides a special frequency converter power cable for coal mining machine, which aims to overcome the problems of insufficient flexibility, overlarge bending radius, and low flame retardant effect and strength of the outer sheath in the prior art, the roundness of the cable core is high, and the stability of the cable when bending can be ensured; the cable has excellent mechanical performance and good elasticity and flame retardant property.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a frequency converter power cable special for a coal mining machine comprises a main body lead, a grounding wire and a control wire, wherein the grounding wire and the control wire form a functional cable; the outer side of the cable core is wrapped with a flame-retardant sheath.
In the technical scheme, the flame-retardant sheath is made of chlorinated polyethylene rubber material with high flame retardance and high mechanical property, so that the cable is ensured to have excellent mechanical property and good elasticity and flame retardance. The functional cable and the main conductor are arranged at intervals and are twisted together, so that the roundness of the cable core can be ensured, and the stability of the cable during bending can be ensured.
Preferably, a fiber layer is arranged between the cable core and the flame-retardant sheath. The fiber layer is formed by weaving high-strength fibers, and the bending resistance of the cable can be improved.
Preferably, an insulating inner layer, an isolating middle layer and an outer shielding layer are arranged between the flame-retardant sheath and the fiber layer, and the insulating inner layer, the isolating middle layer and the outer shielding layer are sequentially arranged from inside to outside and are tightly attached to each other. The insulating inner layer is made of a high-strength insulating rubber sheath material, so that the cable core is subjected to overall insulation protection, and the cable is ensured to have excellent mechanical properties and certain insulating properties. The outer shielding layer is formed by weaving tinned copper wires, and the weaving density is not less than 80%. The insulating middle layer can isolate the insulating inner layer from the outer shielding layer.
Preferably, the main conductor is wrapped with a main conductor insulation layer, the main conductor insulation layer is wrapped with a main conductor shielding layer, and a main conductor isolation layer is arranged between the main conductor and the main conductor insulation layer. The main line insulating layer is made of ethylene propylene rubber materials with high electrical insulating property and high mechanical strength, and the cable core is subjected to overall insulation protection, so that the cable is guaranteed to have excellent electrical insulating property and good mechanical property. The main line shielding layer is woven by tinned copper wires and colored fibers, the tinned copper wires are used for shielding interference signals, and the colored fibers are used for phase separation identification of the main line core. The main line isolation layer is used for isolating the main body lead and the main line insulation layer.
Preferably, a main line semiconductor layer is provided between the main line insulating layer and the main line shielding layer. After the conductor is stranded, small protrusions are formed on the surface of the conductor, the electric field at the positions of the protrusions is far higher than that at other positions, and the main line semiconductor layer can play a role in balancing the electric field.
Preferably, the control line comprises a control belting layer and a plurality of inner wire cores, and the control belting layer is wrapped on the outer sides of the inner wire cores. The control band layer can protect the internal sinle silk, and the control line that a plurality of internal sinle silks are constituteed can keep unanimous with the earth connection size, and the functional cable of being convenient for twines after with main part wire interval arrangement, can guarantee the compactedness of cable simultaneously.
Preferably, the inner wire core is sequentially provided with a control conductive layer and a control insulating layer from inside to inside. The control insulating layer can ensure that the inner wire cores can transmit signals independently.
Preferably, the main conductor material is a tinned copper wire. The tinned copper wire is soft in material and good in conductivity, and compared with a bare copper wire, the tinned copper wire is higher in corrosion resistance and oxidation resistance, and the service life of a weak current cable can be greatly prolonged.
The utility model has the advantages that: (1) the cable core has high roundness, so that the stability of the cable during bending is ensured; (2) the cable has excellent mechanical property and good elasticity and flame retardant property; (3) the cable interference signal shielding effect is good; (4) the electric field of the cable can be equalized.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the cable comprises a cable core 1, a main body wire 1.1, a functional cable 1.2, a grounding wire 1.2.1, a control wire 1.2.2, a control belting layer 1.2.2.1, an inner wire core 1.2.2, a control conducting layer 1.2.2.2.1, a control insulating layer 1.2.2.2.2, a flame-retardant sheath 2, a fiber layer 3, an insulating inner layer 4, an isolation middle layer 5, an outer shielding layer 6, a main wire insulating layer 7, a main wire shielding layer 8 and a main wire semiconductor layer 9.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1:
as shown in fig. 1, a special frequency converter power cable for a coal mining machine comprises a main conductor 1.1, a ground wire 1.2.1 and a control wire 1.2.2, wherein the ground wire 1.2.1 and the control wire 1.2.2 form a functional cable 1.2, and the functional cable 1.2 and the main conductor 1.1 are arranged at intervals and twisted into a cable core 1;
the main body lead 1.1 is made of a tinned copper wire; a main line insulating layer 7 wraps the outer side of the main body lead 1.1, a main line shielding layer 8 wraps the outer side of the main line insulating layer 7, a main line isolating layer 10 is arranged between the main body lead 1.1 and the main line insulating layer 7, and a main line semiconductor layer 9 is arranged between the main line insulating layer 7 and the main line shielding layer 8; the main line insulating layer 7 is made of ethylene propylene rubber materials with high electrical insulating performance and high mechanical strength, and the main line shielding layer 8 is woven by tinned copper wires and colored fibers;
the control line 1.2.2 comprises a control belting layer 1.2.2.1 and a plurality of inner wire cores 1.2.2.2, and the control belting layer 1.2.2.1 is wrapped outside the inner wire cores 1.2.2.2; the inner wire core 1.2.2.2 is sequentially provided with a control conductive layer 1.2.2.2.1 and a control insulating layer 1.2.2.2.2 from inside to inside;
the outer side of the cable core 1 is wrapped with a flame-retardant sheath 2; a fiber layer 3 is arranged between the cable core 1 and the flame-retardant sheath 2, and the fiber layer 3 is formed by weaving high-strength fibers; an insulating inner layer 4, an isolating middle layer 5 and an outer shielding layer 6 are arranged between the flame-retardant sheath 2 and the fiber layer 3, and the insulating inner layer 4, the isolating middle layer 5 and the outer shielding layer 6 are sequentially arranged from inside to outside and are tightly attached; the insulating inner layer 4 is made of a high-strength insulating rubber sheath material, the outer shielding layer 6 is formed by weaving tinned copper wires, and the weaving density is not less than 80%.
In the technical scheme, the flame-retardant sheath 2 is made of chlorinated polyethylene rubber material with high flame retardance and high mechanical property, so that the cable is ensured to have excellent mechanical property and good elasticity and flame retardance. The functional cable 1.2 and the main conductor 1.1 are arranged at intervals and twisted together, so that the roundness of the cable core 1 can be ensured, and meanwhile, the stability of the cable during bending is ensured. The fiber layer is formed by weaving high-strength fibers, and the bending resistance of the cable can be improved. The insulating inner layer is made of a high-strength insulating rubber sheath material, so that the cable core is subjected to overall insulation protection, and the cable is ensured to have excellent mechanical properties and certain insulating properties. The main line semiconductor layer may function to equalize an electric field.
The utility model has the advantages that: the cable core has high roundness, so that the stability of the cable during bending is ensured; the cable has excellent mechanical property and good elasticity and flame retardant property; the cable interference signal shielding effect is good; the electric field of the cable can be equalized.
Claims (8)
1. A special frequency converter power cable for a coal mining machine comprises a main body lead, a grounding wire and a control wire, and is characterized in that the grounding wire and the control wire form a functional cable, and the functional cable and the main body lead are arranged at intervals and are twisted into a cable core; the outer side of the cable core is wrapped with a flame-retardant sheath.
2. The frequency converter power cable special for the coal mining machine as claimed in claim 1, wherein a fiber layer is arranged between the cable core and the flame-retardant sheath.
3. The special frequency converter power cable for the coal mining machine as claimed in claim 2, wherein an insulating inner layer, an isolating middle layer and an outer shielding layer are arranged between the flame-retardant sheath and the fiber layer, and the insulating inner layer, the isolating middle layer and the outer shielding layer are sequentially arranged from inside to outside and are closely attached.
4. The frequency converter power cable special for the coal mining machine according to claim 1, 2 or 3, wherein a main line insulating layer wraps the outer side of the main body lead, a main line shielding layer wraps the outer side of the main line insulating layer, and a main line isolating layer is arranged between the main body lead and the main line insulating layer.
5. The frequency converter power cable special for the coal mining machine as claimed in claim 4, wherein a main line semiconductor layer is arranged between the main line insulating layer and the main line shielding layer.
6. The special frequency converter power cable for the coal mining machine as claimed in claim 1, 2 or 3, wherein the control line comprises a control belting layer and a plurality of inner cores, and the control belting layer is wrapped outside the inner cores.
7. The frequency converter power cable special for the coal mining machine as claimed in claim 6, wherein the inner wire core is provided with a control conducting layer and a control insulating layer in sequence from inside to inside.
8. The frequency converter power cable special for the coal mining machine as claimed in claim 1, 2 or 3, wherein the main conductor material is tinned copper wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921447244.9U CN210378584U (en) | 2019-09-02 | 2019-09-02 | Special frequency converter power cable for coal mining machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921447244.9U CN210378584U (en) | 2019-09-02 | 2019-09-02 | Special frequency converter power cable for coal mining machine |
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| CN210378584U true CN210378584U (en) | 2020-04-21 |
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| CN201921447244.9U Active CN210378584U (en) | 2019-09-02 | 2019-09-02 | Special frequency converter power cable for coal mining machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114937520A (en) * | 2022-06-24 | 2022-08-23 | 安徽凌宇电缆科技有限公司 | Tensile and compressive control wire core for coal mining machine cable |
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2019
- 2019-09-02 CN CN201921447244.9U patent/CN210378584U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114937520A (en) * | 2022-06-24 | 2022-08-23 | 安徽凌宇电缆科技有限公司 | Tensile and compressive control wire core for coal mining machine cable |
| CN114937520B (en) * | 2022-06-24 | 2023-05-23 | 安徽凌宇电缆科技有限公司 | Tensile and compression-resistant control wire core for coal cutter cable |
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