CN214203237U - Flexible cable for coal mining machine - Google Patents

Abstract

The utility model discloses a flexible cable for coal mining machine, including power core subassembly, control core subassembly, power core subassembly includes power core conductor, power core conductor includes stranded sinle silk monomer, the stranded sinle silk monomer divide into the multilayer from inside to outside, and in each layer the sinle silk monomer all twists together along the same direction of twist; each strand of the wire core monomer comprises a plurality of first tinned copper stranded wires, and the plurality of first tinned copper stranded wires are stranded together along the direction opposite to the stranding direction of the wire core monomer. The utility model discloses a flexible cable for coal-winning machine can reduce the probability of the disconnected core of conductor, and then improves life.

Description

Flexible cable for coal mining machine

Technical Field

The utility model belongs to the technical field of the cable electric wire, concretely relates to flexible cable for coal-winning machine.

Background

The coal mining machine is a common mechanical device for underground coal mining, and the coal mining machine needs to reciprocate on a working surface during working. The cables used to power the shearer and transmit information commands are referred to as shearer cables. Usually, the cable of the coal mining machine is placed in a nylon cable clamp, and the cable clamp can be bent and stretched to resist the impact and collision of coal blocks and ores, so that the cable has a certain mechanical protection effect. When the coal mining machine cable is used, one end of the coal mining machine cable is connected with the explosion-proof junction box of the coal mining machine, and the other end of the coal mining machine cable is connected with the power distribution cabinet at the end of the working face, so that the coal mining machine is electrically connected with the power supply system.

When the shearer cable reciprocates on the face with the shearer, the shearer cable is subjected to mechanical stresses such as frequent bending, stretching, etc. When a common coal cutter cable is bent, a part of the cable, which is positioned within a central line of the cable, is extruded, redundant conductors expand outwards, a part of the cable, which is positioned outside the central line, is stretched, and when the length of the cable is not enough, peripheral conductors are required to compensate, so that a displacement phenomenon that the conductors inside the central line slide to the outside of the central line is formed, namely, the conductors inside the cable are forced to produce displacement, therefore, the cable is easy to break, break and the like after being bent for many times, the conductor coal cutter cannot be started for production, the replacement of the coal cutter cable is troublesome, generally two to three days is required, and great economic loss can be caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the above-mentioned is not enough to exist among the prior art, provide a flexible cable for coal cutter, can reduce the probability of the disconnected core of conductor in removing the occasion use, and then improve the life of cable.

Solve the utility model discloses the technical scheme that technical problem adopted is:

a flexible cable for a coal mining machine comprises a power line core assembly and a control line core assembly (20), wherein the power line core assembly comprises a power line core conductor,

the power wire core conductor comprises a plurality of strands of wire core monomers, the plurality of strands of wire core monomers are divided into a plurality of layers from inside to outside, and the wire core monomers in each layer are twisted together along the same twisting direction;

each strand of the wire core monomer comprises a plurality of first tinned copper stranded wires, and the plurality of first tinned copper stranded wires are stranded together along the direction opposite to the stranding direction of the wire core monomer.

Preferably, the core units in each layer are twisted together along the right direction, and a plurality of the first tinned copper stranded wires in each core unit are twisted together along the left direction.

Preferably, the stranding pitch ratio of each wire core monomer is less than or equal to 10, and the stranding pitch ratio of the plurality of first tin-plated copper stranded wires in each wire core monomer is less than or equal to 14.

Preferably, the first tinned copper stranded wire adopts a tinned copper stranded wire of a fifth structure, and the first tinned copper stranded wire comprises a plurality of tinned copper strands stranded in the same direction.

Preferably, the power wire core assembly further comprises a first insulating layer and a shielding layer, wherein the first insulating layer wraps the power wire core conductor and is made of ethylene propylene rubber; the shielding layer wraps the first insulating layer and is made of semi-conductive rubber.

Preferably, the control wire core assembly comprises a plurality of control wire core conductors, a second insulating layer and a sheath, the plurality of control wire core conductors are stranded along the same direction, and the stranding pitch ratio of the plurality of control wire core conductors is less than or equal to 6; the second insulating layer is wrapped on each control wire core conductor; the sheath is wrapped outside all of the second insulating layer.

Preferably, the control line core assembly still includes the cushion core, the cushion core is filled in many parcels in the control line core conductor transposition back of second insulating layer forms surrounds in the region to extend along control line core conductor's length direction, just the cross section of cushion core is circular, and its diameter slightly is greater than surround the diameter of regional inscribed circle.

Preferably, the flexible cable further comprises a ground wire core assembly, wherein the ground wire core assembly comprises a plurality of second tin-plated copper stranded wires, the second tin-plated copper stranded wires are stranded together along the same direction, and the stranding pitch ratio is larger than or equal to 15.

Preferably, the number of the power line core assemblies is three, the number of the control line core assemblies is one, the number of the ground line core assemblies is one, the outer diameter of each control line core assembly is the same as that of the power line core assemblies, the three power line core assemblies and the one control line core assembly are twisted together around the ground line core assemblies, and the twisting pitch ratio of the three power line core assemblies is less than or equal to 8.

Preferably, the flexible cable further comprises a filling member and an outer sheath, wherein the filling member is filled in a gap generated after the three power line core assemblies and a control line core assembly are twisted around a grounding line core assembly and is made of rubber; the oversheath parcel is in outside three power line core subassembly and a control line core subassembly, just the oversheath includes inlayer, skin and enhancement layer, the skin parcel is in outside the inlayer, the enhancement layer includes the cellosilk, and it inlays and locates in inlayer and/or the skin.

Has the advantages that:

the utility model discloses a flexible cable for coal-winning machine can eliminate sliding each other between its inside components in removing the occasion use, reduces the friction between each subassembly to prevent the mechanical damage that mutual friction produced, consequently can reduce the probability of the disconnected core of conductor, and then improve the life of cable. Particularly, compare with traditional cable, the utility model provides a flexible cable is through the arrangement that changes the inside subassembly of cable, can receive the bending at the cable, the motion that makes each subassembly when tensile effect is by sliding, the displacement form changes into "spring form" form that opens and shuts, become each subassembly by respectively independent atress into the whole atress of cable, mutual sliding between each subassembly has been eliminated, surplus length and the uneven phenomenon of atress of having avoided each subassembly to produce because of sliding, the mechanical damage that friction and the looks mutual friction between each subassembly produced has been reduced, thereby reduce the cable because of frequent bending, the tensile probability that causes the disconnected core of sinle silk conductor, and then improve the life of cable.

Drawings

Fig. 1 is a schematic structural diagram of a flexible cable for a coal mining machine according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a power core conductor according to an embodiment of the present invention;

FIG. 3 is a schematic view of a conventional cable when bent;

fig. 4 is a schematic diagram of a coal cutter according to an embodiment of the present invention when a flexible cable is bent.

In the figure: 10-a power spool assembly; 11-power core conductor; 111-core monomer; 112-a first tin-plated copper strand; 12-a first insulating layer; 13-a shielding layer; 20-control the wire core assembly; 21-control line core conductor; 22-a second insulating layer; 23-a sheath; 24-a cushion core; 30-a ground pad core assembly; 40-a filler piece; 50-outer sheath.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further clearly and completely described below with reference to the accompanying drawings and specific embodiments of the present invention.

Example 1

As shown in fig. 1, the present embodiment discloses a flexible cable for a coal mining machine, which includes a power line core assembly 10 and a control line core assembly 20, wherein: the power core assembly 10 comprises a power core conductor 11, the power core conductor 11 comprises a plurality of wire core monomers 111, the plurality of wire core monomers 111 are divided into a plurality of layers from inside to outside, as shown in fig. 2 (taking four layers as an example), and the wire core monomers 111 in each layer are twisted together along the same twisting direction, that is, the twisting directions of the layers are the same; each wire core monomer 111 comprises a plurality of first tin-plated copper stranded wires 112, and the plurality of first tin-plated copper stranded wires 112 are stranded together along the direction opposite to the stranding direction of the wire core monomer 111.

Compared with the traditional cable (the twisting directions of adjacent layers are opposite), the structure can eliminate the friction between the core monomers of all layers when the structure is bent and stretched, reduce the fatigue damage and the abrasion degree caused by frequent bending and stretching, prolong the service life, reduce the outer diameter of the power core conductor by about 5 percent, and ensure that the power core conductor is softer, thereby preventing the core breaking of the cable.

In this embodiment, the core units 111 in each layer are twisted together along the right direction, and the plurality of first tin-plated copper stranded wires 112 in each core unit 111 are twisted together along the left direction.

Of course, in some embodiments, the core units 111 in each layer may be twisted together in the left direction, and the plurality of first tin-plated copper strands 112 in each core unit 111 may be twisted together in the right direction.

In some embodiments, the strand pitch ratio of each core unit 111 is less than or equal to 10, and the strand pitch ratio of the first tinned copper strands 112 in each strand core unit 111 is less than or equal to 14, so that when the power core conductor is subjected to bending and stretching, the movement direction of the power core conductor is changed from the sliding and displacement form (shown in fig. 3) of a conventional cable to the "spring-like" opening and closing form (shown in fig. 4), thereby ensuring that the friction between the core units 111 in each layer can be eliminated, and reducing the fatigue damage and wear degree caused by frequent bending and stretching.

In some embodiments, the first tinned copper strand 112 is a tinned copper strand of a fifth configuration that includes a plurality of tinned copper strands stranded in the same direction.

In some embodiments, the power core assembly 10 further includes a first insulating layer 12 and a shielding layer 13, wherein the first insulating layer 12 is wrapped outside the power core conductor 11, which is preferably made of ethylene propylene rubber; the shielding layer 13 is wrapped outside the first insulating layer 12 and is made of semi-conductive rubber.

In some embodiments, the control core assembly 20 includes a control core conductor 21, a second insulating layer 22, and a jacket 23. The number of the control wire core conductors 21 is multiple, for example, three or four, the multiple control wire core conductors 21 are twisted along the same direction, and the twisting pitch ratio is less than or equal to 6, so that the control wire core conductors 21 are ensured to be a spring to move in a spring-shaped opening and closing mode when the cable is bent and stretched, and the spring-shaped opening and closing mode does not slide or move due to movement. Of course, the twist pitch ratio may also be smaller, and the smaller the twist pitch ratio, the better the "spring" effect, and the softer the cable, but the smaller the twist pitch ratio will cause the twist in rate to increase, thereby increasing the manufacturing cost and difficulty. In the present embodiment, the number of the control wire core conductors 21 is preferably three. Each control fine conductor 21 should be formed by twisting copper wires after being drawn by a multi-head wire drawing machine as much as possible so as to ensure that the wire diameter of a single-wire copper wire is uniform and the doubling tension is consistent. Each control wire core conductor 21 is wrapped with a second insulating layer 22, the second insulating layer 22 is preferably made of ethylene propylene rubber, the thickness of the second insulating layer 22 wrapped outside each control wire core conductor 21 is consistent, so that the outer diameter of each control wire core conductor 21 after being wrapped with the second insulating layer 22 is kept consistent, and the second insulating layer 22 is fully vulcanized, so that deformation and adhesion caused by undersulfur are avoided. The sheath 23 is wrapped outside all the second insulating layers 22, namely, a plurality of control wire core conductors 21 wrapped on the second insulating layers 22 are twisted together along the same direction, the sheath 23 is wrapped outside the twisted structure, the cross section of the sheath 23 is round or approximately round, and the outer diameter of the sheath 23 is the same as or close to the outer diameter of the power wire core conductor 11 as much as possible. The jacket 23 may be made of chlorosulfonated polyethylene or a similar elastomer.

In some embodiments, the control wire core assembly 20 further includes a pad core 24, the pad core 24 is filled in a surrounding area formed by twisting the plurality of control wire core conductors 21 wrapped by the second insulating layer 22 and extends along a length direction of the control wire core conductors 21, and a cross section of the pad core 24 is circular, a diameter of the cross section is slightly larger than a diameter of an inscribed circle of the surrounding area, so as to ensure that an outer shape of the plurality of control wire core conductors 21 is rounded after being twisted around the circular pad core 24.

In some embodiments, the flexible cable further includes a ground wire core assembly 30, the ground wire core assembly 30 includes a plurality of second tin-plated copper stranded wires (not shown in the figure), more precisely, the ground wire core assembly 20 includes a plurality of exposed second tin-plated copper stranded wires, the plurality of second tin-plated copper stranded wires are stranded together along the same direction, and the stranding pitch ratio is greater than or equal to 15, so that the ground wire core assembly 30 can generate a certain degree of deformation under the extrusion of the power wire core assembly 10 and the control wire core assembly 20, and if the ground wire core assembly is in a saddle shape, the stability of the cable structure is improved.

In some embodiments, the number of the power wire core assemblies 10 is three, the number of the control wire core assemblies 20 is one, the number of the ground wire core assemblies 30 is one, the outer diameters of the control wire core assemblies 20 are the same as or similar to the outer diameters of the three power wire core assemblies 10, and the three power wire core assemblies 10 and the one control wire core assembly 20 are twisted around the ground wire core assembly 30, wherein the twisting pitch-diameter ratio is less than or equal to 8. And, three power line core subassembly 10 and a control line core subassembly 20 symmetric distribution, because the diameter of four is the same or close, its symmetric structure distributes and can make its overall structure not take the directionality when crooked, and carry out the crooked direction of random, from avoiding frequently buckling towards certain direction and causing each sinle silk conductor damaged degree inhomogeneous to be favorable to extension cable life.

In some embodiments, the flexible cable for a coal mining machine further includes a filling member 40 and an outer sheath 50, wherein the filling member 40 is filled in a gap generated by twisting the three power wire core assemblies 10 and the one control wire core assembly 20 around the one ground wire core assembly 30 to ensure that the three power wire core assemblies 10 and the one control wire core assembly 20 are kept round after being twisted around the one ground wire core assembly 30, and the filling member 40 is preferably made of rubber; the outer sheath 50 is wrapped around the three power wire core assemblies 10 and the control wire core assembly 20, and the outer sheath 50 is made of chlorosulfonated polyethylene or a similar elastomer, and has excellent mechanical and physical properties and environmental erosion resistance.

In some embodiments, the outer sheath 50 may be a single layer, a double layer, or more than three layers. In the present embodiment, the outer sheath 50 includes an inner layer, an outer layer, and a reinforcing layer (not shown), wherein the outer layer is wrapped around the inner layer, and the reinforcing layer includes fiber filaments embedded in the inner layer and/or the outer layer.

It should be noted that the flexible cable of the present embodiment is applicable to a coal mining machine that needs to be frequently moved, and is also applicable to any other occasions that need to be frequently moved.

The utility model discloses a flexible cable for coal-winning machine, compare with traditional cable, through the arrangement who changes the inside subassembly of cable, can receive the bending at the cable, the motion mode that makes each subassembly when tensile effect is by sliding, the displacement form changes into "spring form" form that opens and shuts, become each subassembly by respectively independent atress into the whole atress of cable, the mutual sliding between each subassembly has been eliminated, surplus length and the uneven phenomenon of atress of having avoided each subassembly to produce because of sliding, the mechanical damage that friction and the looks mutual friction between each subassembly produced has been reduced, thereby reduce the cable because of frequent bending, the tensile probability that causes the disconnected core of sinle silk conductor, and then improve the life of cable.

It will be understood that the above description is only of the preferred embodiments of the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and such modifications and improvements are considered to be within the scope of the invention.

Claims (10)

1. A flexible cable for a coal mining machine comprises a power line core assembly (10) and a control line core assembly (20), and is characterized in that the power line core assembly comprises a power line core conductor (11),

the power wire core conductor comprises a plurality of strands of wire core monomers (111), the plurality of strands of wire core monomers are divided into a plurality of layers from inside to outside, and the wire core monomers in each layer are twisted together along the same twisting direction;

each wire core monomer comprises a plurality of first tinned copper stranded wires (112), and the plurality of first tinned copper stranded wires are stranded together along the direction opposite to the stranding direction of the wire core monomer.

2. The flexible cable for the coal mining machine according to claim 1, wherein the core units in each layer are twisted together in a right direction, and a plurality of the first tinned copper strands in each core unit are twisted together in a left direction.

3. The flexible cable for the coal mining machine according to claim 2, wherein the stranding pitch ratio of each wire core monomer is less than or equal to 10, and the stranding pitch ratio of the plurality of first tinned copper stranded wires in each wire core monomer is less than or equal to 14.

4. The flexible cable for a coal cutter according to claim 3, wherein the first tinned copper strand is a tinned copper strand of a fifth configuration comprising a plurality of tinned copper strands stranded in the same direction.

5. A flexible cable for a coal mining machine according to claim 3, characterized in that the power cord assembly further comprises a first insulating layer (12), a shielding layer (13),

the first insulating layer wraps the power wire core conductor and is made of ethylene propylene rubber;

the shielding layer wraps the first insulating layer and is made of semi-conductive rubber.

6. The flexible cable for a coal mining machine according to claim 1, wherein the control core assembly includes a control core conductor (21), a second insulating layer (22), and a sheath (23),

the number of the control wire core conductors is multiple, the control wire core conductors are stranded along the same direction, the ratio of the stranding pitch diameter is less than or equal to 6,

the second insulating layer is wrapped on each control wire core conductor;

the sheath is wrapped outside all of the second insulating layer.

7. The flexible cable for a coal mining machine according to claim 6, wherein the control cord core assembly further comprises a cushion core (24),

the cushion core is filled in a surrounding area formed by twisting a plurality of control wire core conductors wrapping the second insulating layer and extends along the length direction of the control wire core conductors,

and the cross section of the cushion core is circular, and the diameter of the cushion core is slightly larger than that of the inscribed circle of the encircling area.

8. The flexible cable for a coal mining machine according to claim 7, further comprising a ground wire core assembly (30),

the grounding wire core assembly comprises a plurality of second tinned copper stranded wires which are stranded together along the same direction, and the stranding pitch ratio is larger than or equal to 15.

9. The flexible cable for a coal mining machine according to claim 8, wherein the number of the power wire core assemblies is three, the number of the control wire core assemblies is one, the number of the ground wire core assemblies is one,

and the outer diameter of the control wire core component is the same as the outer diameters of the three power wire core components,

the three power wire core assemblies and one control wire core assembly are twisted together around the ground wire core assembly, and the ratio of the twisting pitch diameter is less than or equal to 8.

10. The flexible cable for a coal mining machine according to claim 9, further comprising a filler (40), an outer sheath (50),

the filling piece is filled in a gap generated after the three power wire core assemblies and the control wire core assembly are twisted around the grounding wire core assembly and is made of rubber;

the oversheath parcel is in outside three power line core subassembly and a control line core subassembly, just the oversheath includes inlayer, skin and enhancement layer, the skin parcel is in outside the inlayer, the enhancement layer includes the cellosilk, and it inlays and locates in inlayer and/or the skin.

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