CN218455988U

CN218455988U - Frequency converter cable

Info

Publication number: CN218455988U
Application number: CN202222674642.2U
Authority: CN
Inventors: 翟元辉; 李智棣; 李晓玲; 林锦辉; 李敏婷
Original assignee: Guangdong Zhonglian Cable Group Co ltd
Current assignee: Guangdong Zhonglian Cable Group Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-02-07
Anticipated expiration: 2032-10-11

Abstract

The utility model discloses a frequency converter cable, which comprises a cable core, a wrapping tape layer, a shielding layer, an inner sheath and an outer sheath which are arranged from inside to outside in sequence; the inner sheath is made of chlorosulfonated polyethylene rubber coated on the shielding layer; the outer sheath is made of nitrile rubber modified polyvinyl chloride material and is coated on the inner sheath. The utility model discloses the oversheath layer is nitrile rubber modified polyvinyl chloride material, gives the cable good low temperature resistance (can reach-40 ℃), tear resistance and wearability, and the cable has high extension, tough, flexible, and life is high. As an outer layer protection material, the outer sheath is arranged and used for protecting the main structure and the main sheath material inside the cable, so that physical damage to the cable in the processes of transportation, laying and the like is reduced, and the service life of the cable in a severe environment is effectively prolonged.

Description

Frequency converter cable

Technical Field

The utility model relates to a wire and cable technical field, concretely relates to converter cable.

Background

The variable frequency cable is a special cable for connecting a variable frequency power supply and a variable frequency motor, and is widely applied to industries such as papermaking, metallurgy, metal processing, mines, railways and the like. The structure of the existing variable frequency cable adopts a 3+3 wire core structure which comprises three main wires and three zero lines, wherein a wrapping layer, a copper tape layer and an outer sheath are arranged outside the wire core, so that the cable can bear pulse voltage during high-speed frequent frequency conversion and has a good protection effect on a variable frequency electric appliance.

The utility model discloses a chinese utility model patent with publication number CN216817940U discloses an anti-interference frequency conversion cable, which comprises a cable core and a wrapping layer wrapped outside the cable core, wherein a total shielding layer and an outer sheath layer are arranged outside the wrapping layer, the cable core is composed of a main line conductor, a ground line conductor and a signal conductor, the main line conductor and the ground line conductor are respectively provided with three groups, the three groups of main line conductors and the three groups of ground line conductors are all arranged in a regular triangle, wherein an external tangent structure is formed between the three groups of main line conductors, a group of ground line conductors are respectively arranged at the external tangent positions of two adjacent groups of main line conductors, and the signal conductor is arranged at the external tangent central position of the three groups of main line conductors; and a filling layer is filled in the wrapping layer. Adopt frequency conversion cable, through adopting the itemized shielding, carry out the total shielding mode again behind the stranding, can effectively solve the poor problem of electromagnetic shield effect to through the signal conductor who sets up, reach the multi-purpose of a cable, have simple structure, safe and reliable, the stable performance, its practicality is higher, has extensive application place.

The existing variable frequency cable mainly focuses on optimizing the electromagnetic shielding performance, but the poor abrasion resistance of the variable frequency cable is an urgent problem to be solved in the field, and particularly in the use scenes of the cable such as metallurgy, mines, railways and the like, the cable sheath is easy to wear and damage due to pulling in the laying process and the like, so that the variable frequency cable has great potential safety hazards.

Therefore, a frequency converter cable with good wear resistance is to be provided.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical defect, the utility model provides a converter cable.

In order to solve the above problem, the utility model discloses realize according to following technical scheme:

the utility model relates to a frequency converter cable, which comprises a cable core, a wrapping tape layer, a shielding layer, an inner sheath and an outer sheath which are arranged from inside to outside in sequence;

the inner sheath is made of chlorosulfonated polyethylene rubber coated on the shielding layer;

the outer sheath is made of nitrile rubber modified polyvinyl chloride material and is coated on the inner sheath.

Preferably, a heat insulation layer is further arranged between the shielding layer and the inner sheath, and the heat insulation layer is wrapped on the shielding layer through a ceramic silicon rubber belt.

Preferably, the shielding layer is a copper tape shielding layer.

Preferably, the wrapping tape layer is non-hygroscopic and wraps the cable core with the wrapping tape.

Preferably, the lapping rate of the non-hygroscopic lapping tape is not less than 25%.

Preferably, the cable core adopts six line structures of three-phase, and the cable includes 6 conductors that are provided with the insulating layer, the insulating layer is cross-linked polyethylene insulating material cladding on the conductor, all is provided with the filling rope between cable core and around the band layer and between conductor and the conductor.

Preferably, the filler rope is a non-hygroscopic filler rope.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a frequency converter cable, which comprises a cable core, a wrapping tape layer, a shielding layer, an inner sheath and an outer sheath which are arranged from inside to outside in sequence; the inner sheath is formed by coating chlorosulfonated polyethylene rubber on a shielding layer; the outer sheath is made of nitrile rubber modified polyvinyl chloride material and is coated on the inner sheath.

(1) The utility model discloses a chlorosulfonated polyethylene rubber is an elastomer that polyethylene obtained through sulfonyl chlorination as the inner sheath, chlorosulfonated polyethylene rubber, has fine toughness, tensile strength, efflorescence resistance, heat-resisting, durability, fire-retardant isoterformance, and insulating layer improves the temperature resistant grade of cable in coordination, gives the excellent mechanical physical properties of cable, and the tensile is dragged, makes the cable can bear long distance load, avoids pulling or draws the damage to the cable.

(2) The utility model discloses an oversheath layer is nitrile rubber modified polyvinyl chloride material, gives the cable good low temperature resistance (can reach-40 ℃), tear resistance and wearability, and the cable has high extension, tough, flexible, and life is high. As an outer layer protection material, the outer sheath is arranged and used for protecting the main structure and the main sheath material inside the cable, so that physical damage to the cable in the processes of transportation, laying and the like is reduced, and the service life of the cable in a severe environment is effectively prolonged.

Drawings

The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic cross-sectional view of a frequency converter cable according to embodiment 1 of the present invention;

fig. 2 is a schematic cross-sectional view of a frequency converter cable according to embodiment 2 of the present invention;

in the figure:

10-a cable core;

20-wrapping a wrapping tape layer;

30-a shielding layer;

40-an inner sheath;

50-an outer sheath;

and 60-heat insulation layer.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1-2, the present invention provides a preferred structure of a cable for a frequency converter.

Example 1

As shown in FIG. 1, a converter cable, include by interior cable core 10, around band layer 20, shielding layer 30, inner sheath 40 and oversheath 50 that sets gradually from outside.

Wherein, the utility model discloses a cable core adopts six line structures of three-phase, and the cable includes that 6 conductors that are provided with the insulating layer (in this field, divide into phase line and ground wire), and 3 phase lines of cable adopt triangle-shaped distribution structure, and 3 ground wires distribute in the juncture of 3 phase lines. Because the three-phase six-wire adopts a balanced symmetrical structure, the electromagnetic interference generated by three-phase loads can be greatly reduced, the impedance is reduced, the uniformity of an electric field is realized, and the conversion time between the motor and the driver during voltage multiplication is prolonged.

In one implementation, the conductor is a copper conductor.

In a specific implementation, the insulating layer is made of crosslinked polyethylene insulating material and covers the conductor, and filling ropes are arranged between the cable core and the wrapping tape layer and between the conductor and the wrapping tape layer.

In one specific implementation, the shielding layer is a copper strip shielding layer, so that the electromagnetic shielding effect of the cable is realized.

In one implementation, the filler rope is a non-hygroscopic filler rope. The winding band layer is non-hygroscopic and is wound on the cable core. Through the packing rope and the wrapping tape that adopt non-hygroscopicity material, can avoid the cable to absorb water and absorb moisture, prevent to influence the electrical properties of cable to use under various adverse circumstances for a long time.

In one embodiment, the non-hygroscopic tape has a lap coverage of no less than 25%.

In the preferred implementation of the utility model, the inner sheath is made of chlorosulfonated polyethylene rubber coated on the shielding layer; the outer sheath is made of nitrile rubber modified polyvinyl chloride material and is coated on the inner sheath.

The utility model discloses a chlorosulfonated polyethylene rubber is an elastomer that polyethylene obtained through sulfonyl chlorination as the inner sheath, chlorosulfonated polyethylene rubber, has fine toughness, tensile strength, efflorescence resistance, heat-resisting, durability, fire-retardant isoterformance, and insulating layer improves the temperature resistant grade of cable in coordination, gives the excellent mechanical physical properties of cable, and the tensile is dragged, makes the cable can bear long distance load, avoids pulling or draws the damage to the cable. The outer sheath layer is made of nitrile rubber modified polyvinyl chloride material, so that the cable has good low-temperature resistance (reaching-40 ℃), tear resistance and wear resistance, and the cable has high elongation, toughness, flexibility and long service life. As an outer layer protection material, the outer sheath is arranged and used for protecting the main structure and the main sheath material inside the cable, so that physical damage to the cable in the processes of transportation, laying and the like is reduced, and the service life of the cable in a severe environment is effectively prolonged.

Through the specific combination of the inner sheath and the outer sheath, the cable has excellent mechanical property and wear resistance, excellent tear resistance and wear resistance, and can be protected to meet the requirements of laying and installing the cable in use scenes such as metallurgy, mines, railways and the like. The combination of the two can greatly avoid the accidents caused by the exposure of the wire core due to abrasion, and reduce the friction damage between the construction dragging process and the laying environment such as the ground.

Example 2

This embodiment 2 provides a preferred inverter cable having a cable structure substantially the same as that of embodiment 1 except that: and a heat insulation layer is further arranged between the shielding layer and the inner sheath and is wrapped on the shielding layer by a ceramic silicon rubber belt.

As shown in fig. 2, a heat insulation layer 60 is further disposed between the shielding layer 30 and the inner sheath 40, and the heat insulation layer is formed by wrapping a ceramic silicone rubber tape on the shielding layer.

The utility model discloses still newly-increased the insulating layer inside the cable, it adopts ceramic silicon rubber band, and its fire behaviour is excellent, and calorific capacity is low during the burning, and low cigarette excellent performance satisfies the feature of environmental protection simultaneously, and ceramic silicon rubber band can not too much increase the cable external diameter, and is less to cable pliability influence, is comparatively ideal thermal insulation material. On the other hand, the heat insulation layer is made of ceramic materials, and is crusted into a hard protection layer at the high temperature of more than 350 ℃, and the hard protection layer is provided with honeycomb pores inside, so that the cable has excellent flame-retardant and heat-insulating properties, and the cable can be used as a frequency converter cable.

Other configurations of a preferred converter cable described in this embodiment are known from the prior art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. A frequency converter cable is characterized by comprising a cable core, a wrapping tape layer, a shielding layer, an inner sheath and an outer sheath which are sequentially arranged from inside to outside;

2. A frequency converter cable according to claim 1, characterized in that:

and a heat insulation layer is further arranged between the shielding layer and the inner sheath and is wrapped on the shielding layer by a ceramic silicon rubber belt.

3. A frequency converter cable according to claim 2, characterized in that:

the shielding layer is a copper strip shielding layer.

4. A frequency converter cable according to claim 1, characterized in that:

the winding band layer is non-hygroscopic and is wound on the cable core.

5. A frequency converter cable according to claim 4, characterized in that:

the lapping and covering rate of the non-hygroscopic lapping tape is not less than 25%.

6. Frequency converter cable according to any one of claims 1 to 5, characterized in that:

the cable core adopts six line structures of three-phase, and the cable includes that 6 are provided with the conductor of insulating layer, the insulating layer is the cladding of crosslinked polyethylene insulating material on the conductor, all is provided with the packing rope between cable core and around the band layer and between conductor and the conductor.

7. A frequency converter cable according to claim 6, wherein:

the filling rope is a non-hygroscopic filling rope.