CN103545032A

CN103545032A - Cable for coal mine frequency conversion device with voltage of 1.9/3.3kv and below

Info

Publication number: CN103545032A
Application number: CN201310532419.7A
Authority: CN
Inventors: 虞文品; 陈小洋; 张超超; 胡光祥; 李慧
Original assignee: XINGLE CABLE CO Ltd
Current assignee: XINGLE CABLE CO Ltd
Priority date: 2013-10-24
Filing date: 2013-10-24
Publication date: 2014-01-29

Abstract

Provided is a cable for a coal mine frequency conversion device with the voltage of 1.9/3.3kv and below. The cable for the coal mine frequency conversion device with the voltage of 1.9/3.3kv and below comprises a cable core and an outer sheath, wherein the cable core comprises a plurality of power line cores and a plurality of control line cores with ground wires, the power line cores and the control line cores with the ground wires are twisted to form the cable core, a lining layer, a braided copper wire shielding layer, an aluminum plastic composite band shielding layer and the outer sheath are arranged outside the cable core in sequence from inside to outside, each power line core comprises a power line core conductor, an insulting layer A which wraps the power line core conductor in a pressing mode, and an insulating shielding layer which wraps the insulating layer A, and each control line core with the ground wire comprises a control line core conductor, an insulating layer B which wraps the control line core conductor in a pressing mode, a ground wire core which is sparsely wound on the insulating layer B, and a semi-conducting layer which wraps the ground wire core. The cable for the coal mine frequency conversion device with the voltage of 1.9/3.3kv and below has the advantages that the shielding performance is good, an ideal shielding factor is no larger than 0.8, and the defects that an existing variable-frequency cable is poor in shielding performance, and is without the control line cores are overcome.

Description

1.9/3.3kV and following coal mine frequency conversion device cable

Technical field

The present invention relates to a kind of cable, be specifically related to a kind of rated voltage 1.9/3.3kV and following rubber jacketed flexible cable for coal mine frequency conversion device.

Background technology

Rubber jacketed flexible cable for coal mine frequency conversion device requires cable to have oil resistant, the characteristic such as wear-resistant, fire-retardant, and has good shielding properties when being subject to the mechanical stress effects such as frequent bending, stretching.

Publication number is that the Chinese patent of 102262937A discloses " a kind of rubber jacketed flexible cable for coal mine frequency conversion device ", this cable primary structure comprises: some power cores and ground core, power core and ground core twisted synthesizing cable core, at the shielding of cable core outer setting proof copper-wire braided and oversheath.

Publication number is that the Chinese patent of 202183246U discloses " converter plant rubber sleeve flexible cable for a kind of colliery ", and primary structure comprises: inserts, three strands of power cores and three strands of control cores; Described power core comprises a power line core conductor, at described power line core conductor, is provided with a power line core insulation layer outward, at described power line core insulation layer, is provided with semiconductor electric screen layer outward; Described control core comprises a control line core conductor, at described control line core conductor, is provided with a control line core insulation layer outward, at described control line core insulation layer, is provided with semiconductor electric screen layer outward.

Yet nowadays some RHVC as coal-winning machine etc. except want dynamic core and core, also need to have several control cores, as directly twisted into control core, will reduce structural stability and the resistance to bend(ing) energy of cable in above structure.And under the environment being on the rise in electromagnetic interference, the shield effectiveness of said structure is also difficult to meet instructions for use.

Summary of the invention

The object of this invention is to provide a kind of 1.9/3.3kV and following coal mine frequency conversion device cable that can solve above-mentioned two problems.

For achieving the above object, the solution that the present invention takes is: a kind of 1.9/3.3kV and following coal mine frequency conversion device cable, comprise cable core and oversheath, cable core comprises some strands of power cores and the some strands of control cores with ground wire, power core and with the control core twisted synthesizing cable core of ground wire, in cable core outside, set gradually from inside to outside inner covering, proof copper-wire braided screen, aluminium-plastic tape screen and oversheath, power core comprises power line core conductor, be extruded in the insulating barrier A outside power line core conductor and be coated on the insulation screen outside insulating barrier A, control core with ground wire comprises control line core conductor, be extruded in the insulating barrier B of control line core conductor outside, dredge around the ground core of insulating barrier B outside and be coated on the semi-conductive layer of core outside, ground.

This cable is mainly used in coal mine frequency conversion device and by control system, powers or connect use, there is stronger shielding properties, desirable shielding factor is not more than 0.8, and in access control core, guaranteed structural stability and the resistance to bend(ing) energy of cable, solved the shortcomings such as existing frequency-changing cable shielding properties is poor, nothing control core.

This cable compared with prior art has following some advantage: the shielding properties of (1) cable is superior, and desirable shielding factor is not more than 0.8; (2) the ground core of cable be dredge around form be placed in outside control line core conductor, in access control core, guarantee that cable has good structural stability and resistance to bend(ing) energy; (3) this cable has fire resistance simultaneously.

Accompanying drawing explanation

Fig. 1 is the generalized section of this enforcement.

In figure: 1, power line core conductor, 2, insulating barrier A, 3, insulation screen, 4, control line core conductor, 5, insulating barrier B, 6, core, 7, semi-conductive layer, 8, inner covering, 9, proof copper-wire braided screen, 10, aluminium-plastic tape screen, 11, oversheath.

Embodiment

Below in conjunction with illustrative embodiments and accompanying drawing thereof, further illustrate the present invention, but embodiment should not be construed as to concrete restriction of the present invention.

Referring to Fig. 1, a kind of rubber jacketed flexible cable for coal mine frequency conversion device, comprise cable core and oversheath 11, cable core comprises some strands of power cores and the some strands of control cores with ground wire, power core and with the control core twisted synthesizing cable core of ground wire, in cable core outside, set gradually from inside to outside inner covering 8, proof copper-wire braided screen 9, aluminium-plastic tape screen 10 and oversheath 11, power core comprises power line core conductor 1, be extruded in the insulating barrier A2 outside power line core conductor 1 and be coated on the insulation screen 3 outside insulating barrier A2, control core with ground wire comprises control line core conductor 4, be extruded in the insulating barrier B5 of control line core conductor 4 outsides, dredge around the ground core 6 of insulating barrier B5 outside and the semi-conductive layer 7 that is coated on core 6 outsides, ground.

Referring to Fig. 1, described insulating barrier A2, insulation screen 3, insulating barrier B5, semi-conductive layer 7, inner covering 8, oversheath 11 all adopt flame retardant type material.

Referring to Fig. 1, described power core is respectively three strands with the control core with ground wire.

The above is only the preferred embodiment of the present invention, for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvement, and these improvement also should be considered as protection scope of the present invention.

Claims

1. a 9/3.3kV and following coal mine frequency conversion device cable, comprise cable core and oversheath (11), it is characterized in that: cable core comprises some strands of power cores and the some strands of control cores with ground wire, power core and with the control core twisted synthesizing cable core of ground wire, in cable core outside, set gradually from inside to outside inner covering (8), proof copper-wire braided screen (9), aluminium-plastic tape screen (10) and oversheath (11), power core comprises power line core conductor (1), be extruded in the outer insulating barrier A (2) of power line core conductor (1) and be coated on the outer insulation screen (3) of insulating barrier A (2), control core with ground wire comprises control line core conductor (4), be extruded in the outside insulating barrier B (5) of control line core conductor (4), dredge around the outside ground core (6) of insulating barrier B (5) and be coated on the outside semi-conductive layer (7) of ground core (6).

2. 1.9/3.3kV according to claim 1 and following coal mine frequency conversion device cable, is characterized in that: described insulating barrier A (2), insulation screen (3), insulating barrier B (5), semi-conductive layer (7), inner covering (8), oversheath (11) all adopt flame retardant type material.

3. 1.9/3.3kV according to claim 1 and following coal mine frequency conversion device cable, is characterized in that: described power core is respectively three strands with the control core with ground wire.