CN212084730U - Power cable - Google Patents

Abstract

The application relates to a power cable, including cable core and the tegument of cladding outside the cable core, be provided with buffer structure on the tegument, buffer structure includes inner protective layer, outer protective layer, resistance to compression buffer layer, and the inner protective layer cladding sets up on the tegument lateral wall outside, and the outer protective layer cladding sets up on the inner protective layer lateral wall, resistance to compression buffer layer sets up on the inner protective layer and the outer protective layer is connected. This application has and cushions external pressure through the resistance to compression buffer layer to reduced the extrusion force of external pressure to outer tegillum and cable core, reduced the probability that the cable received the damage, improved the life-span of cable.

Description

Power cable

Technical Field

The application relates to the technical field of cables, in particular to a power cable.

Background

The cable is indispensable in the power transmission and distribution process or the wired communication process, the power cable is mainly used for power supply or electrical connection in a low-voltage line, and the product is suitable for industries such as petroleum, chemical industry, power plants, metallurgy, papermaking, mines, railways and the like, has wide application market development prospect, and has good economic benefit and social benefit.

Among the prior art, can refer to the chinese utility model patent that the grant bulletin number is CN209487213U, it discloses a fire-retardant fire prevention low voltage power cable of high performance mineral insulation, the cable includes the cable core, the peripheral cladding has the fire-retardant layer of system fire prevention from inside to outside in proper order of cable core, the insulating buffer layer that blocks water, ripple copper sheathing layer and tegument, the cable core includes three main fire prevention insulation core and three ground fire prevention insulation core, three main fire prevention insulation core contact each other, three ground fire prevention insulation core are in the marginal space between three main fire prevention insulation core, main fire prevention insulation core and ground fire prevention insulation core all include the conductor, the peripheral cladding of conductor is assisted insulating layer and the fire-retardant layer of phase splitting fire prevention from inside to outside in proper.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the existing cable is poor in anti-extrusion performance, so that the cable is easily damaged when being extruded externally, and the service life of the cable is shortened.

SUMMERY OF THE UTILITY MODEL

In order to improve the life of the cable, the application provides a power cable.

The application provides a power cable adopts following technical scheme:

the utility model provides a power cable, includes cable core and the tegument of cladding outside the cable core, be provided with buffer structure on the tegument, buffer structure includes inner protective layer, outer protective layer, resistance to compression buffer layer, the inner protective layer cladding sets up on the tegument lateral wall, the outer protective layer cladding sets up on the inner protective layer lateral wall, resistance to compression buffer layer sets up on the inner protective layer and outer protective layer is connected.

Through adopting above-mentioned technical scheme, when external pressure extrudeed the outer protective layer, the outer protective layer extrudeed the resistance to compression buffer layer, consequently the resistance to compression buffer layer cushions external pressure to reduced the extrusion force of external pressure to outer tegument and cable core, reduced the probability that the cable received the damage, improved the life-span of cable.

Preferably, the compression-resistant buffer layer is a buffer tube with a wavy section, and the buffer tube is radially provided with a plurality of buffer tubes along the inner protection layer.

Through adopting above-mentioned technical scheme, the outer protective layer extrudees the buffer tube, and buffer tube wavy structure comes to cushion the extrusion force that receives, and a plurality of buffer tubes have improved the buffering effect to external pressure simultaneously to this reaches the pressure of outer protective layer and carries out the purpose of buffering.

Preferably, the cable core comprises three main fireproof insulation wire cores and three ground fireproof insulation wire cores, and the main fireproof insulation wire cores and the three ground fireproof insulation wire cores are distributed in a staggered mode around the same axis.

By adopting the technical scheme, the space occupied by the main fireproof insulation wire core and the three ground fireproof insulation wire cores is saved, the space occupied by the cable in transportation is reduced, and the convenience in cable transportation is improved.

Preferably, the main fireproof insulation wire core comprises an insulation layer and a main wire core, the insulation layer is arranged on the inner side wall of the outer layer, and the main wire core is arranged on the inner side wall of the insulation layer and formed by mutually winding a plurality of single wire cores.

By adopting the technical scheme, the insulating layer coats the main wire cores, so that the contact probability of the three main wire cores is reduced; a plurality of single-wire cores are mutually wound together, so that the probability that the single-wire cores are mutually dislocated due to movement is reduced, and the stability of the main wire core is improved.

Preferably, the outer tegument axis is provided with a tensile steel wire, and the inner side wall of the outer tegument is provided with a filling layer which is abutted against the three main fireproof insulation wire cores and the tensile steel wire.

By adopting the technical scheme, the steel wire can play a role in axial strength support, and the axial tensile strength of the cable is improved; the filling layer supports three main fire-proof insulation wire cores and the steel wires, stability of the main fire-proof insulation wire cores and the steel wires is improved, the filling layer can buffer external pressure, and service life of the cable is prolonged.

Preferably, adjacent two main fire prevention insulation core links together through coupling mechanism, coupling mechanism includes first go-between, second go-between, conducting tube, locking piece, the lateral wall of the one side that first go-between and second go-between are close to each other rotates to be linked together and the cooperation presss from both sides tight insulating layer, the conducting tube sets up on first go-between, and adjacent the main core is pegged graft respectively and is installed on the conducting tube, the locking piece sets up on first go-between and is connected with the second go-between.

The length of the cable is limited, so when the length of the cable is not enough, the cable needs to be connected, or when the cable is damaged and repaired, the cable also needs to be connected after being trimmed, but the existing connecting device has a complex structure, and the efficiency of cable connection is reduced;

through adopting above-mentioned technical scheme, open the locking piece, then can rotate first go-between and increase the distance between first go-between and the second go-between, put into the insulating layer on two adjacent main sinle silks between first go-between and the second go-between, insert two main sinle silks respectively simultaneously on the both ends of electric conduction pipe, then rotate first go-between and the cooperation of second go-between and press from both sides tight insulating layer, close the locking piece, reach the mesh together with two main fire prevention insulating core fixed connection with this.

Preferably, the locking member includes a locking block provided on the second connection ring, and a locking screw passing through the first connection ring and threadedly coupled with the locking block.

By adopting the technical scheme, the locking screw rod is screwed to adjust the distance between the first connecting ring and the second connecting ring, so that the first connecting ring and the second connecting ring can be matched to loosen or clamp the insulating layer, and the purpose of opening or closing the first connecting ring and the second connecting ring is achieved.

Preferably, the conductive tube comprises a first conductive ring and a second conductive ring, and the first conductive ring and the second conductive ring are respectively arranged on the side walls of the opposite sides of the first connecting ring and the second connecting ring and are matched with each other to clamp the main wire core.

Through adopting above-mentioned technical scheme, when putting into insulating layer on the first go-between for the main line core is put into first conductive ring intra-annular, then when second go-between and first go-between cooperation are pressed from both sides tight insulating layer, and the cooperation of second conducting ring and first conducting ring is pressed from both sides tight main line core, need not to insert the main line core in first conductive ring, has improved the convenience when installing the cable.

Preferably, a sealing strip abutting against the second connecting ring is arranged on the side wall of the first connecting ring close to the second connecting ring.

Through adopting above-mentioned technical scheme, the sealing strip has reduced the clearance between first go-between and the second go-between, has reduced the rainwater and has got into in first go-between and the second go-between and cause the probability of damage to the thread core.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the external pressure is buffered by the compression-resistant buffer layer, so that the extrusion force of the external pressure to the outer tegument and the cable core is reduced, the probability of damage to the cable is reduced, and the service life of the cable is prolonged;

2. the main wire cores are coated by the insulating layer, so that the contact probability of the three main wire cores is reduced; the single wire cores are mutually wound together, so that the probability of mutual dislocation of the single wire cores due to movement is reduced, and the stability of the main wire core is improved;

3. the distance between the first connecting ring and the second connecting ring is increased by screwing the locking screw, one end of the insulating layer on two adjacent main wire cores is placed on the first connecting ring, so that the main wire cores are placed into the first conductive ring, then the locking screw is screwed to enable the second connecting ring and the first connecting ring to be matched to clamp the insulating layer, the second conductive ring and the first conductive ring are matched to clamp the main wire cores, and therefore the two main fireproof insulating wire cores are fixedly connected together, and the efficiency of cable connection is improved.

Drawings

Fig. 1 is a schematic perspective view of the present application, omitting a connecting mechanism;

FIG. 2 is a schematic structural view of a cable core according to the present application, wherein the inner protective layer, the filler layer, the insulating layer and the side wall of the flame retardant layer are partially cut away;

FIG. 3 is a schematic structural view of the cushioning and protective structures of the present application, with the outer protective layer, fire barrier and wear layer side walls partially in section;

FIG. 4 is a schematic structural view of the connection mechanism of the present application;

fig. 5 is an exploded view of the connection mechanism of the present application.

Reference numerals: 1. a tegument layer; 11. a tensile steel wire; 12. a filling layer; 2. a cable core; 21. a primary fire-resistant insulated wire core; 22. a ground fireproof insulated wire core; 23. an insulating layer; 24. a main wire core; 25. a fire resistant and flame retardant layer; 26. a clamping groove; 3. a buffer structure; 31. an inner protective layer; 32. an outer protective layer; 33. a compression-resistant buffer layer; 4. a protective structure; 41. an inner protective layer; 42. an outer protective layer; 43. a tensile fixing net; 44. caulking grooves; 45. a glue layer; 46. a fire barrier flame retardant layer; 47. a wear layer; 5. a connecting mechanism; 51. a first connecting ring; 511. a seal ring; 512. a sealing strip; 52. a second connection ring; 521. mounting blocks; 53. a locking member; 54. a locking block; 55. locking the screw rod; 56. a first conductive ring; 57. a second conductive ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a power cable.

Referring to fig. 1 and 2, the cable core 2 comprises a cable core 2 and a jacket layer 1 coated on the outer side wall of the cable core 2, the cable core 2 comprises three main fireproof insulation wire cores 21 and three ground fireproof insulation wire cores 22, and the three main fireproof insulation wire cores 21 and the three ground fireproof insulation wire cores 22 are distributed around the axis of the jacket layer 1 in a staggered manner.

Three main fire prevention insulation core 21 and three ground fire prevention insulation core 22 structures are the same, below explain with main fire prevention insulation core 21 structure as an example, main fire prevention insulation core 21 includes insulating layer 23, main core 24, insulating layer 23 fixed mounting is on outer 1 inside wall of tegillum, main core 24 is installed on insulating layer 23 inside wall, and main core 24 is formed by many single core intertwines, fixed mounting has fire prevention fire-retardant layer 25 on the insulating layer 23 inside wall, seted up on fire prevention fire-retardant layer 25 inside wall a plurality ofly with single core joint complex joint groove 26.

Install a tensile steel wire 11 on the axis of tegument 1, install filling layer 12 between three main fire prevention insulated wire cores 21 and three ground fire prevention insulated wire cores 22 and be located tegument 1, and filling layer 12 is the mixture of talcum powder and magnesium carbonate, and the talcum powder is widely used as the cable isolating agent to reduce the probability of mutual contact friction between insulating layer 23, reduced the wearing and tearing between insulating layer 23.

Referring to fig. 1 and fig. 3, the cladding has buffer structure 3 on the outer lateral wall of tegument 1, buffer structure 3 includes interior protective layer 31, outer protective layer 32, resistance to compression buffer layer 33, interior protective layer 31 cladding is on outer lateral wall of tegument 1, on inner protective layer 31 lateral wall is wrapped to outer protective layer 32, resistance to compression buffer layer 33 sets up between inner protective layer 31 and outer protective layer 32, and resistance to compression buffer layer 33 and inner protective layer 31 and outer protective layer 32 fixed connection, resistance to compression buffer layer 33 is the buffer tube, and the buffer tube is wavy along the projection of inner protective layer 31 axis, the buffer tube is radially provided with a plurality ofly along inner protective layer 31 simultaneously, and the buffer tube figure can be two, two buffer tubes superpose each other together, the crest position of two wavy structures simultaneously is.

Outer protective layer 32 lateral wall is provided with protective structure 4, protective structure 4 includes interior inoxidizing coating 41, outer inoxidizing coating 42, tensile fixed network 43, the cladding of interior inoxidizing coating 41 is installed on outer inoxidizing coating 42 lateral wall, inoxidizing coating 41 lateral wall including the cladding of outer inoxidizing coating 42 is installed, tensile fixed network 43 sets up between inoxidizing coating 41 and outer inoxidizing coating 42 including, and tensile fixed network 43 and interior inoxidizing coating 41 and the equal fixed connection of outer inoxidizing coating 42, tensile fixed network 43 is woven by the steel wire and is formed, and tensile fixed network 43 is latticed.

An embedded groove 44 for embedding the steel wire is formed in the inner protective layer 41 and the outer protective layer 42, a glue layer 45 is arranged between the outer protective layer 42 and the inner protective layer 41, and the outer protective layer 42, the outer protective layer 42 and the steel wire are fixedly connected together through the glue layer 45; the fire-proof flame-retardant layer 46 is installed on the outer side wall of the outer protective layer 42 in a wrapping mode, the fire-proof flame-retardant layer 25 and the fire-proof flame-retardant layer 46 are identical in structure, the fire-proof flame-retardant layer 25 is explained as an example below, the fire-proof flame-retardant layer 25 is a tinned copper wire woven layer, and polypropylene and chlorinated polyethylene are installed on the inner side and the outer side of the tinned copper wire woven layer respectively. The outer side wall of the fire-proof and flame-retardant layer 46 is coated with a wear-resistant layer 47.

Referring to fig. 1 and 4, the main fire-resistant insulated wire core 21 and the ground fire-resistant insulated wire core 22 of two adjacent cables are connected together by the connection mechanism 5, and the connection mechanism 5 for connecting the two main fire-resistant insulated wire cores 21 is explained as an example.

Referring to fig. 4 and 5, the connection mechanism 5 includes a first connection ring 51, a second connection ring 52, a conductive tube, and a locking member 53, wherein the side walls of the side where the first connection ring 51 and the second connection ring 52 are close to each other are rotatably connected together, and the first connection ring 51 and the second connection ring 52 are both semi-circular, and the first connection ring 51 and the second connection ring 52 are matched to be circular to clamp the insulation layer 23.

The conductive tube is installed on the first connecting ring 51, and the conductive tube includes a first conductive ring 56 and a second conductive ring 57, and the first conductive ring 56 and the second conductive ring 57 are respectively and fixedly installed on the inner side wall of the opposite side of the first connecting ring 51 and the second connecting ring 52, and the first conductive ring 56 and the second conductive ring 57 are both semicircular, the first conductive ring 56 and the second conductive ring 57 are matched to be circular, when the first connecting ring 51 and the second connecting ring 52 are matched to clamp the insulating layer 23, and the first conductive ring 56 and the second conductive ring 57 are matched to clamp the main wire core 24.

The locking member 53 is disposed on the first connection ring 51 and connected to the second connection ring 52, the locking member 53 includes a locking block 54 and a locking screw 55, the locking block 54 is fixedly mounted on the outer side wall of the second connection ring 52, a mounting block 521 is fixedly mounted on the outer side wall of the first connection ring 51, and the locking screw 55 passes through the mounting block 521 and is in threaded connection with the locking block 54.

The locking screw 55 is screwed to increase the distance between the first connecting ring 51 and the second connecting ring 52, a part of the insulating layer 23 on two adjacent main cores 24 is peeled off to expose the main cores 24, one end of the insulating layer 23 is placed on the first connecting ring 51, so that the main cores 24 are placed in the first conductive ring 56, the insulating layer 23 abuts against the first conductive ring 56 to be positioned, then the locking screw 55 is screwed to drive the second connecting ring 52 to be matched with the first connecting ring 51 to clamp the insulating layer 23, and the second conductive ring 57 is matched with the first conductive ring 56 to clamp the main cores 24, so that the two main fireproof insulating cores 21 are fixedly connected together.

Both ends of the second connection ring 52 of the first connection ring 51 are fixedly provided with a sealing ring 511 abutting against the outer side wall of the insulating layer 23, and a sealing strip 512 abutting against the second connection ring 52 is fixedly arranged on the side wall of the first connection ring 51 close to the second connection ring 52.

The working principle of the embodiment of the application is as follows:

the locking screw 55 is screwed to increase the distance between the first connecting ring 51 and the second connecting ring 52, one end of the insulating layer 23 is placed on the first connecting ring 51, so that the main wire core 24 is placed in the first conducting ring 56, then the locking screw 55 is screwed to enable the second connecting ring 52 and the first connecting ring 51 to be matched to clamp the insulating layer 23, and the second conducting ring 57 and the first conducting ring 56 are matched to clamp the main wire core 24, so that the main fireproof insulating wire core 21 is fixedly connected together, and meanwhile, the ground fireproof insulating wire core 22 is fixedly connected together in the same method, so that two cables can be fixedly connected together, meanwhile, the main fireproof insulating wire core 21 or the ground fireproof insulating wire core 22 can be connected according to the damage condition of the cables, and the efficiency of cable connection is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides a power cable, includes cable core (2) and cladding tegument (1) outside cable core (2), its characterized in that: be provided with buffer structure (3) on tegument (1), buffer structure (3) include inner protective layer (31), outer protective layer (32), resistance to compression buffer layer (33), inner protective layer (31) cladding sets up on tegument (1) lateral wall, outer protective layer (32) cladding sets up on inner protective layer (31) lateral wall, resistance to compression buffer layer (33) set up on inner protective layer (31) and outer protective layer (32) are connected.

2. A power cable according to claim 1, characterized in that: the compression-resistant buffer layer (33) is a buffer tube with a wavy section, and the buffer tube is radially provided with a plurality of inner protective layers (31).

3. A power cable according to claim 1, characterized in that: the cable core (2) comprises three main fireproof insulation wire cores (21) and three ground fireproof insulation wire cores (22), and the main fireproof insulation wire cores (21) and the three ground fireproof insulation wire cores (22) are distributed in a staggered mode around the same axis.

4. A power cable according to claim 3, characterized in that: main fire prevention insulation core (21) include insulating layer (23), main line core (24), insulating layer (23) set up on outer tegument (1) inside wall, main line core (24) set up on insulating layer (23) inside wall and by many single-wire core intertwine form.

5. A power cable according to claim 1, characterized in that: be provided with tensile steel wire (11) on tegument (1) axis, be provided with filling layer (12) of contradicting on three main fire prevention insulation sinle silks (21) and tensile steel wire (11) on tegument (1) inside wall.

6. A power cable according to claim 4, characterized in that: adjacent two main fire prevention insulation core (21) link together through coupling mechanism (5), coupling mechanism (5) include first go-between (51), second go-between (52), conductive tube, locking piece (53), the lateral wall of one side that first go-between (51) and second go-between (52) are close to each other rotates to link together and the cooperation presss from both sides tight insulating layer (23), the conductive tube sets up on first go-between (51), and adjacent main sinle silk (24) are pegged graft respectively and are installed on the conductive tube, locking piece (53) set up on first go-between (51) and are connected with second go-between (52).

7. A power cable according to claim 6, characterized in that: the locking piece (53) comprises a locking block (54) and a locking screw rod (55), the locking block (54) is arranged on the second connecting ring (52), and the locking screw rod (55) penetrates through the first connecting ring (51) and is in threaded connection with the locking block (54).

8. A power cable according to claim 6, characterized in that: the conductive tube comprises a first conductive ring (56) and a second conductive ring (57), wherein the first conductive ring (56) and the second conductive ring (57) are respectively arranged on the side wall of one side opposite to the first connecting ring (51) and the second connecting ring (52) and are matched with each other to clamp the main wire core (24).

9. A power cable according to claim 6, characterized in that: and a sealing strip (512) which is abutted against the second connecting ring (52) is arranged on the side wall of the first connecting ring (51) close to the second connecting ring (52).

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