CN115591971A

CN115591971A - High-strength flame-retardant cable and processing equipment thereof

Info

Publication number: CN115591971A
Application number: CN202211272704.5A
Authority: CN
Inventors: 谭剑; 洪志文; 杜有红
Original assignee: Guangxi Zhuanxian Wire And Cable Co ltd
Current assignee: Guangxi Zhuanxian Wire And Cable Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-01-13
Anticipated expiration: 2042-10-18
Also published as: CN115591971B

Abstract

The invention discloses a high-strength flame-retardant cable and processing equipment thereof, wherein the processing equipment comprises a wire drawing machine body, a feed inlet is formed in one side of the wire drawing machine body, a cleaning device is fixedly connected to the inner wall of the feed inlet, a discharge outlet is formed in one side of the wire drawing machine body, which is far away from the feed inlet, and a cooling device is fixedly connected to the inner wall of the discharge outlet; the processing equipment accessible cleaning head that provides brushes the clearance to the material surface, conveniently gets rid of the impurity on material surface, avoids impurity influence wire drawing effect. High strength flame retarded cable includes the cable sandwich layer, and cable core layer outside parcel has the filling layer, and the outside parcel of filling layer has around the covering, has fire-retardant layer around the covering outside parcel, and fire-retardant layer outside parcel has the shielding layer, and shielding layer outside parcel has the enhancement layer, and enhancement layer outside fixedly connected with wearing layer through being equipped with fire-retardant layer, enhancement layer and wearing layer etc. can improve the flame retardant efficiency of cable and improve tensile and the abrasion strength of cable.

Description

High-strength flame-retardant cable and processing equipment thereof

Technical Field

The invention relates to the technical field of wire and cable processing, in particular to a high-strength flame-retardant cable and processing equipment thereof.

Background

A cable is a rope-like cable typically made by twisting several or several groups of at least two wires, each group insulated from each other and usually twisted around a center, the entire outer surface being covered with a highly insulating coating. The cable has the characteristics of internal electrification and external insulation. The cable includes power cable, control cable, compensation cable, shielding cable, high temperature cable, computer cable, signal cable, coaxial cable, fire-resistant cable, marine cable, mining cable, aluminum alloy cable and the like. They are composed of single or multi-strand wires and insulating layers, and are used for connecting circuits, electric appliances and the like. The wire drawing device that present cable used in the course of working can't carry out the preliminary treatment to the material usually for draw the impurity on in-process material surface can be impressed inside the material, lead to the wire drawing inhomogeneous, influence product quality.

Disclosure of Invention

In order to achieve the purpose, the invention is realized by the following technical scheme: the processing equipment for the high-strength flame-retardant cable comprises a wire drawing machine, wherein the wire drawing machine comprises a wire drawing machine body, a feed inlet is formed in one side of the wire drawing machine body, a cleaning device is fixedly connected to the inner wall of the feed inlet, a discharge outlet is formed in one side, far away from the feed inlet, of the wire drawing machine body, and a cooling device is fixedly connected to the inner wall of the discharge outlet;

the cleaning device includes:

the fixing ring is provided with a cylindrical structure with openings at two ends, and a moving slide way arranged on the inner wall of the fixing ring, and the moving slide way is fixedly connected with the inner wall of the fixing ring;

the cleaning head is provided with an arc-shaped structure and an elastic telescopic rod arranged on one side of the cleaning head, and one end of the elastic telescopic rod, which is far away from the cleaning head, is in sliding connection with the inner wall of the movable slideway through an electronic sliding block;

linking bridge, this linking bridge one end and retainer plate fixed connection, the one end fixedly connected with that the retainer plate was kept away from to linking bridge soaks the device, and the accessible cleaning head carries out the surface to the material and brushes the clearance, conveniently gets rid of the impurity on material surface, avoids impurity influence wire drawing effect.

Preferably, the cleaning head is provided with a plurality of groups, and is adjacent to each other, the elastic telescopic rods on the cleaning head are fixedly connected through arc-shaped supporting rods, the fixing ring is arranged inside the feeding port and fixedly connected with the inner wall of the feeding port, and the fixing ring is communicated with the inside of the wire drawing machine body through the feeding port.

Preferably, the cleaning head comprises an arc-shaped support, a rotating groove is formed in one side of the arc-shaped support, a rotating disc is connected to the inner wall of the rotating groove in a rotating mode, a brush head is fixedly connected to the side face of the rotating disc, a small motor is fixedly connected to the side face of the arc-shaped support, a driving shaft of the small motor penetrates through the arc-shaped support and is fixedly connected with the side face of the rotating disc, different positions on the rotating disc and positions where materials are in contact can be made, the treatment effect is conveniently improved, when the brush head rotates to one side of a scraping plate along with the rotating disc, the brush head can be scraped through the scraping plate, auxiliary impurities on the brush head are scraped, the brush head can be conveniently and automatically treated, manual cleaning is not needed, and the use is convenient.

Preferably, the scraper blade is fixedly connected to one side of the inner wall of the rotating groove, and the part, located on one side of the scraper blade, of the inner wall of the rotating groove penetrates through and is connected with the storage box in a sliding mode.

Preferably, one side of the arc-shaped support far away from the rotating groove is fixedly connected with the end part of the elastic telescopic rod, and the brush heads are provided with a plurality of groups and are uniformly distributed on the rotating disc.

Preferably, soak the device and include the annular tube, the inboard intercommunication of annular tube has communicating pipe, the one end intercommunication of keeping away from the annular tube communicating pipe has the wet pipe, it has the hole of soaking to soak intraductal side division, the inboard fixedly connected with annular cotton pad of wet pipe.

Preferably, annular pipe one side and linking bridge fixed connection, annular pipe one side intercommunication has the feed liquor pipe, the feed liquor pipe is kept away from the one end and the outside notes liquid equipment intercommunication of annular pipe, and the cotton pad of accessible annular is with the cleaning solution attached to the material surface, drenches the material surface for the material is when through cleaning device, and impurity on it can more easily come off, conveniently improves the clearance effect.

Preferably, cooling device includes cooling jacket, the through hole has all been seted up at the cooling jacket both ends, cooling jacket top and bottom all run through and the swivelling joint has the swinging arms, the swinging arms is located the outside one end fixedly connected with arc telescopic link of cooling jacket, the swinging arms is located the inside one end fixedly connected with bull brush of cooling jacket, and accessible bull brush brushes the inside material of cooling jacket, and the material exchanges the heat and cools off with the inside cooling water of cooling jacket simultaneously, and the greasy dirt on it can be detached in the refrigerated while to the material after the wire drawing, and convenient follow-up processing, cooling jacket are provided with first sleeve pipe and second sleeve pipe, and first sleeve pipe and second sleeve pipe are separable for the material can be more convenient pass cooling jacket.

Preferably, the cooling sleeve comprises an upper half sleeve and a lower half sleeve, the upper half sleeve and the lower half sleeve are connected through a sealing buckle, a sealing gasket is fixedly connected to the inner wall of the through hole, and the lower half sleeve inside the cooling sleeve is fixedly connected with the inner wall of the discharge hole through a support.

The utility model provides a high strength flame retarded cable, includes the cable sandwich layer, cable core layer outside parcel has the filling layer, the filling layer comprises inorganic filler material, the filling layer outside parcel has around the covering, it constitutes around the covering by winding around the tape winding outside the filling layer, it has fire-retardant layer to wrap up around the covering outside, fire-retardant layer comprises fire-retardant material, fire-retardant layer outside parcel has the shielding layer, the shielding layer outside parcel has the enhancement layer, the enhancement layer is made by wire mesh, enhancement layer outside fixedly connected with wearing layer, the fire-retardant layer that constitutes through fire-retardant material will be separated around covering and shielding layer and come, and outside fire source can't pass the fire-retardant layer that fire-retardant material constitutes, and the convenience is protected the inside structure in fire-retardant layer to be provided with the enhancement layer that wire mesh supported, cooperation wearing layer conveniently improves tensile and the abrasion strength of cable.

The invention provides a high-strength flame-retardant cable and processing equipment thereof. The method has the following beneficial effects:

1. this high strength flame retarded cable and processing equipment thereof, be provided with cleaning device, pass the inside central point of retainer plate with the material during use and put, elasticity through elastic telescopic rod drives the cleaning head and compresses tightly on the material surface, then drive elastic telescopic rod through removing slide and electronic sliding block and rotate around the material, elastic telescopic rod drives the cleaning head and rotates around the material, can carry out the surface to the material through the cleaning head and brush the clearance, conveniently get rid of the impurity on material surface, avoid impurity influence wire drawing effect.

2. This a high strength flame retarded cable and processing equipment thereof, be provided with the clearance head, when the clearance head rotates around the material, can drive brush on its inside rolling disc and slide at the material surface, brush the clearance through brushing the head to the material surface, drive the rolling disc through small-size motor simultaneously and rotate, the rolling disc drives the brush head and rotates, can make different positions on the rolling disc and the position of material contact, conveniently improve the treatment effect, and when brush head rotates to scraper blade one side along with the rolling disc, the accessible scraper blade is scraped the brush head, make and brush overhead supplementary impurity of head and scraped and remove, convenient automatic brush head is handled, need not artifical clearance, it is more convenient to use.

3. This a high strength flame retarded cable and processing equipment thereof, be provided with and soak the device, at first through soaking the inside intraductal side that soaks of device between the material gets into cleaning device, outside notes liquid equipment is inside to apply the intraduct cleaning solution of certain pressure notes liquid to feed liquor pipe and passes through the annular pipe and the communicating pipe gets into and soak intraductly, soak the intraduct cleaning solution and discharge to annular cotton pad from soaking the hole, can be through annular cotton pad with the cleaning solution attached to the material surface, wet the material surface, make the material when through cleaning device, impurity on it can more easily take off, conveniently improve the cleaning effect.

4. This high strength flame retarded cable and processing equipment thereof, the material after the wire drawing passes through the cooling jacket through the through hole, and the inside packing of cooling jacket has the cooling water, arc telescopic link drives swinging arms and multi-head brush through flexible this moment at the inside swing of cooling jacket, can brush the inside material of cooling jacket through the multi-head brush, the material exchanges the heat and cools off with the inside cooling water of cooling jacket simultaneously, the greasy dirt on it can be detached in the refrigerated while to the material after the wire drawing, convenient follow-up processing, cooling jacket is provided with first sleeve pipe and second sleeve pipe, first sleeve pipe is separable with second sleeve pipe, make the material can be more convenient pass cooling jacket.

5. This high strength flame retarded cable and processing equipment thereof, the fire-retardant layer that supports through the metal steel band will be separated around covering and shielding layer and come, and outside burning things which may cause a fire disaster can't pass the fire-retardant layer that the steel band constitutes, conveniently protects the structure of fire-retardant in situ portion to be provided with the enhancement layer that the wire mesh supported, the convenient tensile and the abrasion resistance who improves the cable.

Drawings

FIG. 1 is a schematic structural view of a processing apparatus for a high-strength flame-retardant cable according to the present invention;

FIG. 2 is a schematic view of the cleaning apparatus according to the present invention;

FIG. 3 is a schematic view of a cleaning head connection structure according to the present invention;

FIG. 4 is a schematic view of the internal structure of the cleaning head of the present invention;

FIG. 5 is a schematic view of the construction of the soaking device of the present invention;

FIG. 6 is a schematic view of the internal structure of the wetting apparatus of the present invention;

FIG. 7 is a schematic view of the cooling apparatus of the present invention;

FIG. 8 is a schematic view of a cooling jacket separation configuration of the present invention;

fig. 9 is a schematic cross-sectional structure view of the high-strength flame-retardant cable according to the invention.

In the figure: 1. a wire drawing machine body; 2. a feed inlet; 3. a cleaning device; 31. a stationary ring; 32. moving the slideway; 33. cleaning the head; 331. an arc-shaped support; 332. a rotating groove; 333. rotating the disc; 334. a brush head; 335. a small-sized motor; 336. a squeegee; 337. a storage box; 34. an elastic telescopic rod; 35. connecting a bracket; 36. a soaking device; 361. an annular tube; 362. a communicating pipe; 363. wetting the tube; 364. soaking the pores; 365. an annular cotton pad; 366. a liquid inlet pipe; 37. an arc-shaped support rod; 5. a cooling device; 51. cooling the sleeve; 52. a through hole; 53. a swing lever; 54. an arc-shaped telescopic rod; 55. a multi-head brush; 11. a cable core layer; 12. a filling layer; 13. wrapping a covering; 14. a flame retardant layer; 15. a shielding layer; 16. a reinforcing layer; 17. and a wear-resistant layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-2, the present invention provides a technical solution: the processing equipment of the high-strength flame-retardant cable comprises a wire drawing machine, wherein the wire drawing machine comprises a wire drawing machine body 1, a feed inlet 2 is formed in one side of the wire drawing machine body 1, a cleaning device 3 is fixedly connected to the inner wall of the feed inlet 2, a discharge outlet is formed in one side, far away from the feed inlet 2, of the wire drawing machine body 1, and a cooling device 5 is fixedly connected to the inner wall of the discharge outlet;

the cleaning device 3 includes:

the fixing ring 31 is of a cylindrical structure with two open ends, and the moving slide way 32 is arranged on the inner wall of the fixing ring 31, and the moving slide way 32 is fixedly connected with the inner wall of the fixing ring 31;

the cleaning head 33 is provided with an arc-shaped structure, the elastic telescopic rod 34 is arranged on one side of the cleaning head 33, and one end, far away from the cleaning head 33, of the elastic telescopic rod 34 is connected with the inner wall of the movable slide way 32 in a sliding mode through an electronic slide block;

and one end of the connecting bracket 35 is fixedly connected with the fixing ring 31, and one end of the connecting bracket 35, which is far away from the fixing ring 31, is fixedly connected with the soaking device 36.

Cleaning head 33 is provided with the multiunit, through arc branch 37 fixed connection between the elastic expansion link 34 on the adjacent cleaning head 33, retainer plate 31 set up in feed inlet 2 inside and with 2 inner wall fixed connection of feed inlet, retainer plate 31 is through feed inlet 2 and the inside intercommunication of wire drawing machine body 1.

Be provided with cleaning device 3, put the inside central point of retainer plate 31 with the material during use, elasticity through elastic telescopic rod 34 drives cleaning head 33 and compresses tightly on the material surface, then drive elastic telescopic rod 34 and rotate around the material through removing slide 32 and electronic sliding block, elastic telescopic rod 34 drives cleaning head 33 and rotates around the material, can carry out the surface to the material through cleaning head 33 and brush the clearance, conveniently get rid of the impurity on material surface, avoid impurity influence wire drawing effect.

The second embodiment:

referring to fig. 1-6, the present invention provides a technical solution based on the first embodiment: the cleaning head 33 comprises an arc support 331, a rotating groove 332 is formed in one side of the arc support 331, a rotating disc 333 is rotatably connected to the inner wall of the rotating groove 332, a brush head 334 is fixedly connected to the side surface of the rotating disc 333, a small motor 335 is fixedly connected to the side surface of the arc support 331, a driving shaft of the small motor 335 penetrates through the arc support 331 and is fixedly connected to the side surface of the rotating disc 333, a scraper 336 is fixedly connected to one side of the inner wall of the rotating groove 332, a storage box 337 is penetrated and slidably connected to the part of the inner wall of the rotating groove 332, one side of the arc support 331, which is far away from the rotating groove 332, is fixedly connected to the end of the elastic telescopic rod 34, the brush heads 334 are provided with a plurality of groups and uniformly distributed on the rotating disc 333, the cleaning head 33 is arranged, when the cleaning head 33 rotates around a material, the brush head 334 can be driven to slide on the surface of the material on the rotating disc 333, the surface of the material is brushed by the brush head 334, different positions on the rotating disc 333 which are in contact with the material, the treatment effect is convenient, when the brush head 334 rotates along with the rotating disc 333, impurities on the side of the scraper 336 are removed, the cleaning head 336, the auxiliary brush head 334 is convenient for manual cleaning, the auxiliary cleaning head 334 is convenient for manual cleaning, and the auxiliary cleaning head, the cleaning head 336, the auxiliary cleaning head 334 is convenient for manual cleaning head, the use;

the soaking device 36 comprises a ring pipe 361, a communicating pipe 362 is communicated with the inner side of the ring pipe 361, a soaking pipe 363 is communicated with one end, far away from the ring pipe 361, of the communicating pipe 362, a soaking hole 364 is formed in the inner side of the soaking pipe 363, an annular cotton pad 365 is fixedly connected to the inner side of the soaking pipe 363, one side of the ring pipe 361 is fixedly connected with the connecting support 35, a liquid inlet pipe 366 is communicated with one side of the ring pipe 361, one end, far away from the ring pipe 361, of the liquid inlet pipe 366 is communicated with external liquid injection equipment, the soaking device 36 is arranged, when materials enter the cleaning device 3, the materials firstly pass through the inner side of the soaking pipe 363 in the soaking device 36, the cleaning liquid in the liquid inlet pipe 366 through the external liquid injection equipment applying certain pressure enters the soaking pipe 363 through the ring pipe 361 and the communicating pipe 362, the cleaning liquid in the soaking pipe 363 is discharged to the annular cotton pad 365 from the soaking hole 364 through the cleaning equipment 365, the cleaning liquid in the soaking pipe 363 can be attached to the surface of the material through the annular cotton pad 365, the surface of the material is wetted, impurities on the material can be more easily separated when the material passes through the cleaning device 3, and the cleaning effect is convenient to be improved.

Example three:

referring to fig. 1-8, the present invention provides a technical solution based on the first embodiment and the second embodiment: the cooling device 5 comprises a cooling sleeve 51, through holes 52 are formed in two ends of the cooling sleeve 51, the top and the bottom of the cooling sleeve 51 are respectively penetrated and rotatably connected with a swing rod 53, one end of the swing rod 53, which is located outside the cooling sleeve 51, is fixedly connected with an arc-shaped telescopic rod 54, one end of the swing rod 53, which is located inside the cooling sleeve 51, is fixedly connected with a multi-head brush 55, the cooling sleeve 51 comprises an upper half sleeve and a lower half sleeve, the upper half sleeve and the lower half sleeve are connected through a sealing buckle, a sealing gasket is fixedly connected to the inner wall of the through hole 52, the lower half sleeve inside the cooling sleeve 51 is fixedly connected with a discharge port through a support, materials after wire drawing pass through the cooling sleeve 51 through the through hole 52, cooling water is filled inside the cooling sleeve 51, at the moment, the arc-shaped telescopic rod 54 drives the swing rod 53 and the multi-head brush 55 to swing inside the cooling sleeve 51 through stretching, the materials inside the cooling sleeve 51 can be brushed through the multi-head brush 55, meanwhile, the materials and the materials can exchange heat and be cooled, oil stains on the materials after wire drawing can be removed while the materials are conveniently processed, the upper half sleeve and the lower half sleeve 51 can be separated from the materials.

Example four:

referring to fig. 9, the present invention further provides a high strength flame retardant cable including a cable core layer 11, a filler layer 12 is wrapped on an outer side of the cable core layer 11, the filler layer 12 is made of an inorganic filler material, a wrapping layer 13 is wrapped on an outer side of the filler layer 12, the wrapping layer 13 is formed by winding a wrapping tape on an outer side of the filler layer, a flame retardant layer 14 is wrapped on an outer side of the wrapping layer 13, the flame retardant layer 14 is made of a flame retardant material, a shielding layer 15 is wrapped on an outer side of the flame retardant layer 14, a reinforcing layer 16 is wrapped on an outer side of the shielding layer 15, the reinforcing layer 16 is made of a wire mesh, and a wear layer 17 is fixedly connected to an outer side of the reinforcing layer 16.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. The utility model provides a processing equipment of high strength flame retarded cable, processing equipment includes the wire drawing machine, the wire drawing machine includes wire drawing machine body (1), its characterized in that: a feeding hole (2) is formed in one side of the wire drawing machine body (1), a cleaning device (3) is fixedly connected to the inner wall of the feeding hole (2), a discharging hole is formed in one side, far away from the feeding hole (2), of the wire drawing machine body (1), and a cooling device (5) is fixedly connected to the inner wall of the discharging hole;

the cleaning device (3) comprises:

the fixing ring (31) is of a cylindrical structure with two open ends, and the moving slide way (32) is arranged on the inner wall of the fixing ring (31), and the moving slide way (32) is fixedly connected with the inner wall of the fixing ring (31);

the cleaning head (33) is provided with an arc-shaped structure, and an elastic telescopic rod (34) is arranged on one side of the cleaning head (33), and one end, far away from the cleaning head (33), of the elastic telescopic rod (34) is connected with the inner wall of the movable slide way (32) in a sliding mode through an electronic sliding block;

the connecting support (35), this connecting support (35) one end and retainer plate (31) fixed connection, the one end fixedly connected with that the retainer plate (31) is kept away from in connecting support (35) soaks device (36).

2. The processing equipment of the high-strength flame-retardant cable according to claim 1, characterized in that: cleaning head (33) are provided with the multiunit, and are adjacent through arc branch (37) fixed connection between elastic telescopic rod (34) on cleaning head (33), retainer plate (31) set up in feed inlet (2) inside and with feed inlet (2) inner wall fixed connection, retainer plate (31) are through feed inlet (2) and the inside intercommunication of wire drawing machine body (1).

3. The processing equipment of the high-strength flame-retardant cable according to claim 1, characterized in that: cleaning head (33) include arc support (331), rotation groove (332) have been seted up to arc support (331) one side, it is connected with rolling disc (333) to rotate groove (332) inner wall rotation, rolling disc (333) side fixedly connected with brush head (334), arc support (331) side fixedly connected with small motor (335), the drive shaft of small motor (335) run through arc support (331) and with rolling disc (333) side fixed connection.

4. The processing equipment of the high-strength flame-retardant cable according to claim 3, characterized in that: the scraper blade (336) is fixedly connected to one side of the inner wall of the rotating groove (332), and the part, located on one side of the scraper blade (336), of the inner wall of the rotating groove (332) penetrates through and is connected with the storage box (337) in a sliding mode.

5. The processing equipment of the high-strength flame-retardant cable according to claim 3, characterized in that: one side of the arc-shaped support (331), which is far away from the rotating groove (332), is fixedly connected with the end part of the elastic telescopic rod (34), and the brush heads (334) are provided with a plurality of groups and are uniformly distributed on the rotating disc (333).

6. The processing equipment of the high-strength flame-retardant cable according to claim 1, characterized in that: soak device (36) and include annular pipe (361), annular pipe (361) inboard intercommunication has communicating pipe (362), the one end intercommunication that annular pipe (361) was kept away from in communicating pipe (362) has wet pipe (363), wet hole (364) have been seted up to wet pipe (363) inboard, wet pipe (363) inboard fixedly connected with annular cotton pad (365).

7. The processing equipment of the high-strength flame-retardant cable according to claim 6, wherein: annular pipe (361) one side and linking bridge (35) fixed connection, annular pipe (361) one side intercommunication has liquid inlet pipe (366), liquid inlet pipe (366) keep away from annular pipe (361) one end and outside notes liquid equipment intercommunication.

8. The processing equipment of the high-strength flame-retardant cable according to claim 1, characterized in that: cooling device (5) include cooling jacket (51), through hole (52) have all been seted up at cooling jacket (51) both ends, cooling jacket (51) top and bottom are all run through and are rotated and be connected with swinging arms (53), swinging arms (53) are located the outside one end fixedly connected with arc telescopic link (54) of cooling jacket (51), swinging arms (53) are located the inside one end fixedly connected with bull brush (55) of cooling jacket (51).

9. The processing equipment of the high-strength flame-retardant cable according to claim 8, characterized in that: the cooling sleeve (51) comprises an upper half sleeve and a lower half sleeve, the upper half sleeve and the lower half sleeve are connected through a sealing buckle, a sealing gasket is fixedly connected to the inner wall of the through hole (52), and the lower half sleeve inside the cooling sleeve (51) is fixedly connected with the inner wall of the discharge hole through a support.

10. A high strength flame retarded cable which characterized in that: including cable sandwich layer (11), cable sandwich layer (11) outside parcel has filling layer (12), filling layer (12) comprises inorganic filler material, filling layer (12) outside parcel has around covering (13), constitute around covering (13) by winding around the band winding outside the filling layer, it has fire-retardant layer (14) to wrap around covering (13) outside parcel, fire-retardant layer (14) comprises fire-retardant material, fire-retardant layer (14) outside parcel has shielding layer (15), shielding layer (15) outside parcel has enhancement layer (16), enhancement layer (16) are made by wire mesh, enhancement layer (16) outside fixedly connected with wearing layer (17).