CN209880189U - High-voltage explosion-proof high-flame-retardant rubber jacketed flexible cable for coal mine frequency conversion device - Google Patents

Abstract

The utility model provides a colliery frequency conversion device is with high-pressure explosion-proof high flame retardant rubber cover flexible cable, it includes the cable body, and the cable body includes: the high-voltage insulation cable core, the split-phase braided shielding layer, the inner protection layer, the total shielding layer and the outer protection layer are formed by three layers of co-extruded insulation cable cores; a split-phase braided shielding layer is arranged on the three-layer co-extrusion insulated wire core; the cable body adopts three-core symmetrical structure, and the cable body has arranged interior sheath in three-core symmetrical structure outside, and interior sheath outside is provided with total shielding layer, and total shielding layer outside is provided with the outer jacket. The utility model provides an among the colliery frequency conversion device high-pressure explosion-proof high flame retardant rubber cover flexible cable, special structural design has reduced resonance interference and the signal interference that system frequency variation produced, and the anti-static electricity nature, the high flame retardant of inside and outside protective material have strengthened the explosion-proof of cable, have strengthened the life reduce cost of cable greatly.

Description

High-voltage explosion-proof high-flame-retardant rubber jacketed flexible cable for coal mine frequency conversion device

Technical Field

The utility model relates to the technical field of cables, especially, relate to a colliery frequency conversion device is with high-pressure explosion-proof high flame retardant rubber cover flexible cable.

Background

In recent years, with the rapid development of the variable frequency speed control technology, the application of the variable frequency speed control system in the underground coal mine is more and more popular. The variable frequency speed regulation equipment can generate series resonance in the variable frequency speed regulation process, and when the resonance occurs, a larger instantaneous current and voltage can be generated, so that the cable insulation breakdown is easily caused, the larger electromagnetic interference occurs, and the threat is brought to the underground safety production. The cable has high insulating strength, good electromagnetic and resonance interference resistance and good explosion resistance, so that the cable is prevented from being broken down by resonance voltage and the resonance current of a product in operation from interfering a power supply control loop.

The cable for combining coal mine frequency conversion is laid in a narrow environment, generally requires that the cable not only has a good shielding effect, but also has the characteristic of certain flexibility and explosion resistance. The urgent need is to design a cable suitable for operating under the working environment, especially the explosion-proof cable for the frequency conversion device used under high voltage, which is more and more necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims at colliery frequency conversion device itself uses characteristics, provides a colliery frequency conversion device is with high-pressure explosion-proof high flame retardant rubber cover flexible cable, and it is applicable to the connection of colliery high-pressure frequency conversion device equipment, possesses the explosion-proof characteristics of compliance when it has better shielding effect.

The utility model provides a pair of colliery frequency conversion device is with high-pressure explosion-proof high flame retardant rubber cover flexible cable, it includes the cable body, and the cable body includes: the high-voltage insulation cable core comprises three co-extruded insulation cable cores (1), a split-phase braided shielding layer (2), an inner protection layer (3), a total shielding layer (4) and an outer protection layer (5); the three-layer co-extrusion insulated wire core is provided with a split-phase braided shielding layer (2); the cable body adopts three-core symmetrical structure, and the cable body has arranged interior sheath (3) in three-core symmetrical structure outside, and interior sheath (3) outside is provided with total shielding layer (4), and total shielding layer (4) outside is provided with outer jacket (5).

Compared with the prior art, the utility model provides an among the colliery frequency conversion device high-pressure explosion-proof high flame retardant rubber cover flexible cable, special structural design has reduced resonance interference and the signal interference that system frequency variation produced, and the antistatic properties of inside and outside protective material, high flame retardant have strengthened the explosion-proof of cable, have strengthened the life reduce cost of cable greatly.

Further, the cable core gap of the cable body is not filled.

Further, the inner protective layer (3) is an extruded antistatic chlorinated polyethylene material.

Furthermore, the total shielding layer (4) is woven by aramid fiber and/or tinned oxygen-free soft copper wires.

Furthermore, the conductor of the cable core of the cable body is formed by stranding oxygen-free annealed copper wires.

Further, a conductor formed by twisting oxygen-free annealed copper wires is wrapped with a layer of semiconductive nylon belt, a conductor extrusion wrapping conductor shielding layer, an insulation shielding layer and an insulation layer which are wrapped with the semiconductive nylon belt are wrapped, and a layer of semiconductive nylon belt is wrapped outside the three-layer co-extrusion wire core in an overlapping mode.

Furthermore, the split-phase braided shielding layer (2) is braided by adopting tinned oxygen-free copper wires. A layer of semi-conductive nylon belt (the tinned split-phase shielding layer is woven outside the semi-conductive nylon belt) is lapped and wound on the three-layer co-extrusion insulated wire core.

Further, the outer protective layer (5) is an extruded antistatic high-flame-retardant chlorinated polyethylene material.

The utility model has the advantages of as follows:

1. the structure of the cable adopts a three-core symmetrical structure, is superior to the structure that a medium-voltage rubber sleeve 3+1 core ground wire in some traditional designs is used as a core to form a cable, and reduces the resonance interference generated by the frequency change of a system.

2. The cable insulation material adopts the ethylene propylene rubber with high strength and high electrical property, so that the cable has very high current-carrying capacity and high flexible mechanical property.

3. The cable adopts a split-phase sum shielding structure, and electromagnetic interference generated by three loads and interference of external electrical equipment are further reduced.

4. The inner and outer protective layers are made of antistatic high-flame-retardant chlorinated polyethylene materials, so that the antistatic high-flame-retardant chlorinated polyethylene material has good antistatic property, achieves a good explosion-proof effect, and has high flexibility and shock resistance.

5. The utility model discloses a this kind of structure makes the cable have the characteristics that dielectric strength is high, anti electromagnetism and resonance interference performance and explosion-proof nature are good in the use, has strengthened the life reduce cost of cable greatly.

The utility model provides a colliery frequency conversion device is with connection of high-pressure explosion-proof high fire-retardant rubber cover flexible cable mainly used colliery high-pressure frequency conversion device equipment.

Drawings

Fig. 1 is a schematic structural diagram of a high-voltage explosion-proof high-flame-retardant rubber jacketed flexible cable for a coal mine frequency conversion device.

Detailed Description

The present invention will now be described in more detail with reference to the drawings, in which preferred embodiments of the invention are shown, it being understood that one skilled in the art could modify the invention herein described while still achieving the beneficial effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

Example 1: the utility model provides a colliery frequency conversion device is with high-pressure explosion-proof high fire-retardant rubber cover flexible cable, refers to fig. 1, and it includes the cable body, and the cable body includes: the high-voltage insulated wire core and the three-layer co-extruded insulated wire core which are formed by the three-layer co-extruded insulated wire core 1 are provided with a split-phase braided shielding layer 2, an inner protection layer 3, a total shielding layer 4 and an outer protection layer 5.

It can be seen from figure 1 that, cable body inside has three layers and crowd insulating core 1 altogether, these three layers are crowded insulating core 1 altogether and are adopted the annular array mode to arrange in cable body's intermediate position, three layers are crowded insulating core 1 annular array altogether's center is cable body's axis, this embodiment lets cable body form three-core symmetrical structure through above-mentioned structure, let the performance of cable excel in the structure that some traditional designs's middling pressure rubber sleeve 3+1 core ground wires become the cable as one core, the resonance that system frequency change produced is disturbed.

In this embodiment, the conductor of the sinle silk of cable body adopts anaerobic annealing copper wire transposition to form, the conductor that adopts anaerobic annealing copper wire transposition to form has one deck semiconduction nylon area around the package, crowded package conductor shielding layer and insulating shielding layer and the insulating layer of the conductor that has one deck semiconduction nylon area around the package, three-layer is crowded the sinle silk outward overlapping around package one deck semiconduction nylon area altogether, be provided with split-phase braided shielding layer 2 on three-layer is crowded insulating sinle silk altogether, split-phase braided shielding layer 2 adopts tin-plating anaerobic copper wire to weave to form, split-phase shielding layer adopts annealing tin-plating anaerobic soft copper wire to weave on three-layer is.

Referring to fig. 1, the cable body is arranged with inner sheath 3 in three-core symmetrical structure outsides, and inner sheath 3 is the antistatic chlorinated polyethylene material of crowded package, and the oxygen index is up to 36%, vulcanization molding.

Referring to fig. 1, interior sheath 3 outside is provided with total shield layer 4, and total shield layer 4 adopts aramid fiber (aramid yarn) and/or tin-plated anaerobic soft copper wire to weave and forms, and total shield layer 4's form can be: a. half aramid fiber and half tinned anaerobic soft copper wire are adopted to be woven on the inner protective layer, and the weaving density is more than 85%; b. aramid fiber is adopted to weave on the inner protective layer; c. the inner protective layer is braided by tin-plated oxygen-free soft copper wires.

Referring to fig. 1, an outer protective layer 5 is arranged outside a total shielding layer 4, the outer protective layer 5 is an extruded antistatic high-flame-retardant chlorinated polyethylene material, the oxygen index is up to 36%, and the outer protective layer is formed by vulcanization.

It is worth mentioning that the core gap of the cable body of the present embodiment is not filled.

In this embodiment, the high-voltage insulated wire core has a conductor made of high-purity thin oxygen-free annealed copper wire, which is stranded by normal layering, then stranded in the same direction, and fastened by wrapping a layer of semiconductive nylon tape. A three-layer co-extrusion rubber sleeve extrusion device is adopted to extrude and wrap the conductor shield, the insulation shield and the insulation layer, and a layer of semi-conductive nylon belt is lapped outside the three-layer co-extrusion wire core. The conductor shield and the insulation shield are made of rubber type semi-conductive shielding materials, the insulation is made of ethylene propylene rubber materials with high strength and high electrical property, the three-layer co-extrusion rubber sleeve extrusion equipment is used for molding, and a layer of semi-conductive nylon belt is wrapped in an overlapping mode.

The high-voltage insulated wire core is formed by twisting five types of tinned soft copper wires repeatedly, then a semi-conductive nylon belt is wrapped around the high-voltage insulated wire core, and an inner semi-conductive layer, an outer semi-conductive layer and an insulating layer are extruded through three-layer co-extrusion equipment; after the three-layer co-extrusion insulation wire core is wrapped, the annealed anaerobic tinned soft copper wire is woven, the high-voltage insulation shielding wire core is twisted with a smaller pitch to form a cable core, the gap of the cable core is not filled, the inner and outer protective layers are wrapped with anti-static high-flame-retardant chlorinated polyethylene in an extrusion mode, and the total shielding layer is woven on the inner protective layer by adopting half aramid fiber and half tinned anaerobic soft copper wire. The antistatic property and the high flame retardance of the inner and outer protective materials enhance the explosion resistance of the cable.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims (8)

1. The utility model provides a colliery frequency conversion device is with high-pressure explosion-proof high fire-retardant rubber cover flexible cable, its includes the cable body, its characterized in that, the cable body includes: the high-voltage insulation cable core comprises three co-extruded insulation cable cores (1), a split-phase braided shielding layer (2), an inner protection layer (3), a total shielding layer (4) and an outer protection layer (5);

the three-layer co-extrusion insulated wire core is provided with a split-phase braided shielding layer (2);

the cable body adopts three-core symmetrical structure, the cable body has arranged in three-core symmetrical structure outside interior sheath (3), interior sheath (3) outside is provided with total shielding layer (4), total shielding layer (4) outside is provided with outer jacket (5).

2. The high-voltage explosion-proof high-flame-retardant rubber jacketed flexible cable for the coal mine frequency conversion device according to claim 1, characterized in that the gaps of the cable cores of the cable body are not filled.

3. The high-voltage explosion-proof high-flame-retardant rubber jacketed flexible cable for the coal mine frequency conversion device according to claim 1, wherein the inner sheath (3) is an extruded antistatic chlorinated polyethylene material.

4. The high-voltage explosion-proof high-flame-retardant rubber-sheathed flexible cable for the coal mine frequency conversion device according to claim 1, wherein the total shielding layer (4) is woven by aramid fibers and/or tinned oxygen-free soft copper wires.

5. The high-voltage explosion-proof high-flame-retardant rubber-sheathed flexible cable for the coal mine frequency conversion device according to claim 1, characterized in that conductors of a wire core of the cable body are formed by stranding oxygen-free annealed copper wires.

6. The high-voltage explosion-proof high-flame-retardant rubber-sheathed flexible cable for the coal mine frequency conversion device according to claim 5, characterized in that a conductor formed by twisting oxygen-free annealed copper wires is wrapped with a layer of semiconductive nylon tape, the conductor wrapped with the layer of semiconductive nylon tape is extruded with a conductor shielding layer, an insulation shielding layer and an insulation layer, and the layer of semiconductive nylon tape is overlapped outside the three-layer co-extruded wire core.

7. The high-voltage explosion-proof high-flame-retardant rubber jacketed flexible cable for the coal mine frequency conversion device as claimed in claim 1, characterized in that the split-phase braided shielding layer (2) is braided by tin-plated oxygen-free copper wires.

8. The high-voltage explosion-proof high-flame-retardant rubber jacketed flexible cable for the coal mine frequency conversion device according to claim 1, wherein the outer protective layer (5) is an extruded antistatic high-flame-retardant chlorinated polyethylene material.