CN112217173A

CN112217173A - Cable joint fire and explosion protection mechanism

Info

Publication number: CN112217173A
Application number: CN202011145069.5A
Authority: CN
Inventors: 林培斌; 张嘉枫; 林远劲; 章杭; 杨成建
Original assignee: Heruida Guangdong Integrated Energy Services Co ltd
Current assignee: Heruida Guangdong Integrated Energy Services Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-01-12
Also published as: AU2020103657A4

Abstract

The invention provides a cable joint fireproof and explosion-proof mechanism which comprises a bundle sleeve used for accommodating a cable joint, wherein the bundle sleeve is made of flexible fireproof materials and comprises a bundle sleeve body, the bundle sleeve body is provided with an accommodating space used for accommodating the cable joint, one part of the bundle sleeve body is folded to form a folded part, and the folded part is expanded under the action of external force to increase the accommodating space. The cable joint fireproof and explosion-proof mechanism has the advantages of simple structure, good explosion-proof performance and the like.

Description

Cable joint fire and explosion protection mechanism

Technical Field

The invention relates to the field of fireproof and explosion-proof equipment, in particular to a fireproof and explosion-proof mechanism of a cable joint.

Background

The cable joint belongs to the weakest place in the circuit, according to incomplete statistics, 71% cable explosion accidents all happen to the joint in the country. At present, most 10kV cables are placed in the same groove and are adjacent to each other, the problem of multi-loop common path exists, and the phenomena of joint aging and insulation reduction are particularly serious along with the lapse of time in consideration of the factors of uneven joint product quality and installation process. Once the explosion and the burning of the intermediate joint are met, other running lines can be affected, and large-area power failure is caused. For the construction of the reliability of the power grid, the safety protection after the fault of the 10kV cable is particularly important.

The existing cable joint explosion-proof device is used for solving the problem of being used by different cable joint manufacturers, has larger appearance volume and large installation difficulty, and often conflicts with an on-site cable duct to cause the device cannot be used. And the joint explosion-proof device is made of rigid materials with high strength (such as metal materials like stainless steel and the like), has poor fireproof effect, can not effectively prevent the spread of fire after the fire occurs, and can not play a given effect. Meanwhile, the end part of the metal type explosion-proof device needs to be shrunk to match the cable connector, so that the problem of unbalanced internal pressure exists in the end part. When the cable joint explodes, the huge energy of electric arc strikes the inner wall of the explosion-proof device, the impact force distribution generated inside the explosion-proof device generates distortion at the end part, and the impact stress born by certain points of the end part is far larger than that of other parts, so that the end part is more easily cracked. And because the box body is made of metal materials, fragments generated by explosion are easy to cause the safety of surrounding cables, equipment and even personnel.

To this end, the person skilled in the art has made a series of attempts:

for example, chinese patent publication No. CN210490434U discloses a flexible explosion-proof device for a power high-voltage cable joint, which includes a flexible board wrapped around the cable joint and a flexible explosion-proof blanket wrapped around the flexible board, wherein the cross section of the flexible board is a zigzag structure, the flexible explosion-proof blanket is sewn by two layers of fireproof fiber cloth and one layer of explosion-proof fiber cloth, the explosion-proof fiber cloth is located between the two layers of fireproof fiber cloth, and the flexible board is wrapped around the cable joint and is wrapped by the flexible explosion-proof blanket for fixation; the flexible plate adopts a zigzag structure, so that the flexible plate can play a role of buffering and energy absorption when the cable joint explodes, impact energy instantaneously generated by local explosion of the cable joint can be evenly distributed to the whole explosion-proof device, and the overall explosion-proof performance of the explosion-proof device is improved;

for another example, chinese patent publication No. CN209088511U discloses a flexible explosion-proof sleeve for a cable intermediate joint, which includes an explosion-proof sleeve main body; the explosion-proof sleeve main body is formed by wrapping a flexible sheet structure for one circle around a cable intermediate joint, two contacted edge parts of the explosion-proof sleeve main body after the explosion-proof sleeve main body is wrapped for one circle around the cable intermediate joint are fixed through locking pieces, and the two contacted edge parts of the explosion-proof sleeve main body are fixed through nylon screws and then sealed through sealing glue; the two ends of the explosion-proof sleeve main body are provided with pressure release valves, and the two ends of the explosion-proof sleeve main body are sealed with the cable through sealing adhesive tapes. The explosion-proof sleeve is small in size and can be installed in various cable channel environments, the application range of the cable explosion-proof sleeve is enlarged, and the coverage rate of the middle head explosion-proof device is increased; in addition, the pressure relief valves are arranged on the two sides of the protective sleeve, so that the pressure can be safely relieved when the internal pressure of the joint reaches a threshold value;

for another example, chinese patent publication No. CN208112197U discloses a high-voltage cable joint wrapped flexible fire-proof and explosion-proof blanket, which is composed of three layers of flexible materials, namely, a kevlar aramid fiber fire-proof and explosion-proof blanket, a wound aramid fiber cloth, and an oxford cloth, which are sequentially disposed; a plurality of buckle type burr belts are sewn on the outer side of the oxford fabric, and the rough surface and the stabbed surface of the buckle type burr belts are respectively sewn at two end parts of the oxford fabric; the Kevlar aramid fiber wire fireproof and explosion-proof blanket is formed by longitudinally weaving two Kevlar aramid fiber wire blankets with the width of 1.6 meters and 10 layers of longitudinally woven Kevlar aramid fiber wires into a Kevlar aramid fiber wire fireproof and explosion-proof blanket with the width of 3.1 meters; after the high-voltage cable joint is wrapped by the high-voltage cable joint wrapping type flexible fireproof explosion-proof blanket, the high-voltage cable joint is tightly tightened and tied by the aid of the hasp type burr belts, and the high-voltage cable joint wrapping type flexible fireproof explosion-proof blanket is convenient to use and install and can be repeatedly assembled, disassembled and used.

Above-mentioned cable joint fire prevention explosion-proof mechanism has solved the potential safety hazard problem of the explosion-proof box of metal material through the explosion-proof blanket that adopts flexible material, but the structure is still comparatively complicated to produce the atress inequality easily when receiving the impact force of explosion, the explosion in the twinkling of an eye produces the circumstances such as too big impact force is difficult to release buffering to explosion-proof blanket, the security performance needs further promotion.

Disclosure of Invention

In order to solve the technical problems, the invention provides the cable joint fireproof and explosion-proof mechanism which is simple in structure and good in installation performance.

The utility model provides a cable joint fire and explosion protection mechanism, fire and explosion protection mechanism includes a beam cover that is used for holding cable joint, the beam cover that the beam cover was made for flexible fire-proof material, the beam cover includes the beam cover body, the beam cover body is equipped with the accommodation space that is used for holding cable joint, a part of beam cover body forms fold portion through folding, fold portion expands and increase accommodation space under receiving external force.

In the invention, a further preferable scheme is that the bundle sleeve body is a sleeve-shaped structure formed by enclosing flexible fireproof materials.

In the invention, a further preferable scheme is that the flaky flexible fireproof material comprises at least 2 layers of flexible fireproof fabric, and all the layers of flexible fireproof fabric are overlapped layer by layer and fixed into a whole.

In the present invention, it is further preferable that the wrinkle part includes at least 2 layers of wrinkles, and the wrinkles of the respective layers are continuously stacked layer by layer.

In the present invention, it is further preferable that the wrinkles are provided on the collar body in an axial direction of the collar body.

In the present invention, it is further preferable that both ends of the wrinkles are connected to the bundle cover body by sewing, fastening, and attaching.

In the present invention, it is further preferable that both ends of the wrinkle are sewn to the bundle cover body, and the sewn line is one of a line of a chevron shape, a zigzag shape, and an M shape.

In the present invention, it is further preferable that the collar body is cylindrical, the number of the wrinkle portions is at least 2, and the wrinkle portions are arranged on the collar body in a central symmetry manner.

In the present invention, it is further preferable that the accommodating space is adapted to a cable joint to be accommodated.

In the invention, a further preferable scheme is that the fireproof and explosion-proof mechanism further comprises a first wire mesh, and the first wire mesh is arranged in the accommodating space of the bundle sleeve body and used for coating the cable joint.

In the invention, a further preferable scheme is that the fireproof and explosion-proof mechanism further comprises a second wire mesh, and the second wire mesh is coated on the outer surface of the bundle sleeve body.

Compared with the prior art, the invention has the beneficial effects that: according to the cable joint fireproof and explosion-proof mechanism, due to the fact that the structure of the folded part is arranged on the collar body, when the cable joint explodes, the generated impact force can automatically prop open the folded space hidden by the folded part, the size is increased, the explosion force is buffered, huge energy generated by explosion is buffered and absorbed by the collar body, the situation that fragments of a rigid explosion-proof material are splashed after explosion is avoided, meanwhile, the explosion energy can be released, the collar body of the fireproof and explosion-proof mechanism is stressed more uniformly, and products are safer; because the two ends of the cable are in a sealed state after being installed, oxygen can be prevented from entering the cable, the fire is automatically extinguished, the fire is prevented from spreading, external flame cannot enter the cable, the cable is protected from being burnt out, and explosion toxic gas can be prevented from leaking out; meanwhile, the structure is simple, the production cost is low, the size is small, the installation is convenient, and the installation can be carried out in various environments.

Drawings

Fig. 1 is a schematic structural view of a cable joint fire and explosion protection mechanism according to embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of a sheet-like flexible fireproof material of the cable joint fireproof and explosion-proof mechanism according to embodiment 1 of the invention;

FIG. 3 is a schematic structural diagram of a cable joint fire and explosion protection mechanism according to embodiment 5 of the present invention;

10, an accommodating space; 11. a collar body; 12. a wrinkle part; 111. a first flexible fireproof fabric layer; 112. a second flexible fireproof fabric layer; 113. a third flexible fireproof fabric layer; 13. magic tape.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

The utility model provides a cable joint fire and explosion protection mechanism, fire and explosion protection mechanism includes a beam cover that is used for holding cable joint, the beam cover that the beam cover was made for flexible fire-proof material, the beam cover includes the beam cover body, the beam cover body is equipped with the accommodation space that is used for holding cable joint, a part of beam cover body forms fold portion through folding, fold portion can expand and increase the accommodation space under receiving external force.

According to the cable joint fireproof and explosion-proof mechanism, due to the fact that the structure of the folded part is arranged on the collar body, when the cable joint explodes, the generated impact force can automatically prop open the folded space hidden by the folded part, the size is increased, the explosion force is buffered, huge energy generated by explosion is buffered and absorbed by the collar body, the situation that fragments of a rigid explosion-proof material are splashed after explosion is avoided, meanwhile, the explosion energy can be released, the collar body of the fireproof and explosion-proof mechanism is stressed more uniformly, products are safer, and meanwhile, the structure is simple and the production cost is low.

Moreover, due to the fact that the flexible fireproof material is made of the material, the cable joint can still be wrapped after the cable joint explodes, and the two ends of the flexible fireproof material are in a sealed state after the flexible fireproof material is installed, so that the cable joint is isolated from air, oxygen is prevented from entering the cable joint, the flexible fireproof material can automatically extinguish a fire, and the fire is prevented from spreading, electric arc combustion is avoided, meanwhile, external flame cannot enter the cable joint, and the cable is protected from being burnt out; the two ends are sealed, so that the toxic gas generated by explosion can be prevented from leaking, and the safety performance of the whole product is further improved; because it can be folded, so small, the installation is convenient relatively, and various environment homoenergetic installations.

The size and the number of the folds can be selected according to the size of the cable joint and the requirement of the explosion-proof function, for example, the width of the folds is selected to be 50-200mm, the unfolded length of the fold part is set to be 20-80% of the unfolded length of the whole bundle sleeve, the diameter ratio of the bundle sleeve body with the folds before and after being unfolded is 100-350%, and the gap between the inner diameter of the bundle sleeve body and the outer diameter of the wrapped cable joint is 0-30 mm.

The flexible fireproof material in the invention is not limited to specific material, and the existing material can be any material with flexibility and fireproof performance, such as Kevlar aramid fiber fabric, silicon-titanium fireproof cloth, asbestos cloth, glass fiber cloth, carbon fiber cloth, ceramic fiber cloth, silica gel cloth, nanometer fireproof cloth, high silica fiber cloth and the like, including but not limited to the above materials.

In the present invention, the collar body may be an integrally formed collar body, or may be a sleeve structure enclosed by a flexible fireproof fabric, and the shape of the collar body is not particularly limited as long as there is an accommodating space for accommodating a cable joint therein, and the external shape may be cylindrical, prismatic, or conical.

The specific manner of enclosing the flexible material fire-proof material into the collar body may not be particularly limited as long as the material can be connected together and an accommodating space for accommodating the cable connector is enclosed inside.

For flexible fire-proof material, can be 1 layer of flexible fire-proof fabric constitution, also can be multilayer flexible fire-proof fabric constitution, in order to increase the explosion-proof performance, can set up flexible fire-proof fabric at least into 2 layers, each layer flexible fire-proof fabric superposes layer by layer and fixed as an organic whole, can also cover thermal insulation material in multilayer fire-proof fabric simultaneously, like pearlite etc..

To the position that fold portion set up on the collar body, can not do the special limitation, as long as can the atress expansion and increase the accommodation space can, for the atress that makes the collar body is more even, the product is more firm, can set up fold portion along the axis direction of collar body, the number of piles of fold portion also can not do the special limitation, for the explosion-proof performance that increases the product, fold portion can set up to the fold including 2 at least layers, the scope that the accommodation space that makes the expansion after the atress increases like this is bigger, and then the impact force that the release explosion that can be better brought, promote explosion-proof performance.

Correspondingly, the layers of folds can be continuously overlapped together layer by layer, so that the occupied space of the product is smaller.

In order to further reduce the space occupied by the product, the arrangement can be made, and the two ends of the folds are connected with the collar body in a sewing, buckling or attaching mode, so that the folds do not form a large bulge relatively, the folds can be closer to the outer surface of the collar body, and the occupied area of the product is reduced.

For the sewing mode of the folds, two ends of the folds can be sewn on the bundle sleeve, or other parts of the folds are sewn, the two ends are sewn, so that the production of the product is more convenient, and the sewing line is in one of a Chinese character 'shan' -shaped, a Z '-shaped or an M' -shaped; wherein, when the sewed line is in a shape of Chinese character 'shan', the sewing line can be firmer.

In order to ensure that the stress of the product is more uniform when the product is subjected to explosion and the safety performance is higher, the collar body is cylindrical, the number of the fold parts is at least 2, the number of the fold parts is preferably not more than 10, and the fold parts are arranged on the collar body in a central symmetry manner (the center is the axis of the cylindrical collar body), so that when the product is subjected to explosion, the impact force generated by the explosion can be uniformly released and buffered, and the product is safer.

For better coating of the cable joint and reduction of the space occupied by the product, such an arrangement can be made, the accommodation space being adapted to the cable joint to be accommodated.

In order to further improve the safety performance of the cable joint fire and explosion protection mechanism, the fire and explosion protection mechanism can also be arranged, and further comprises a first metal wire mesh, wherein the first metal wire mesh is arranged in the accommodating space of the bundle sleeve body and is used for coating the cable joint; through the arrangement, the first wire mesh can provide a path for conducting short-circuit current when the cable joint fails, so that the danger caused by overlarge current due to short circuit is avoided, and the product is safer; in addition, the first wire mesh is coated on the cable joint and can be regarded as a wire mesh sleeve-shaped structure, so that the cable joint has an electromagnetic shielding function and can reduce the influence of surrounding communication equipment on current in the cable joint. The material of the first metal mesh may not be particularly limited, and may be brass or red copper material (i.e., brass mesh or red copper wire mesh, i.e., a mesh structure woven by brass wires or red copper wires, in which the weaving manner may be a plain weave manner, a twill weave manner, or other mesh weaving manners).

In order to further improve the safety performance of the cable joint fire and explosion protection mechanism, the fire and explosion protection mechanism can also be arranged to further comprise a second wire mesh, wherein the second wire mesh is coated on the outer surface of the bundle sleeve body; through the arrangement of the structure, the explosion-proof structure has the following functions: the second wire mesh covers the outer surface of the collar body, when the cable joint is exploded, the second wire mesh can provide a good supporting function for the collar body and enable the collar body to be stressed more uniformly, meanwhile, the second wire mesh is made of metal wires and has certain expansion and extensibility performance, so that the wire mesh can be deformed and extended under the action of large impact force during explosion but cannot be broken, so that explosion can be limited in the design space of the fireproof and explosion-proof mechanism, other parts cannot be influenced, and the safety performance of a product is improved; in addition, the cladding of second wire mesh is outside at the collar body, can also promote the mechanical strength of whole product, when receiving the collision, also is difficult for damaging.

The material of the second wire mesh may not be particularly specifically limited; in order to prolong the service life of the product, stainless steel materials such as stainless steel wire ropes or materials similar to the stainless steel wire ropes can be selected, namely, stainless steel wires are woven into a net structure, the diameter of the stainless steel wire ropes is 1-10mm, and the core materials of the stainless steel wire ropes can be hemp cores, asbestos cores, metal rope cores and the like, including but not limited to the materials; the shape of the mesh can be diamond, round or other shapes; the mesh size of the second wire mesh is not particularly limited, such as 1-10cm of center-to-center distance of the wire mesh, or (15-55) x (15-55) mm of diamond-shaped mesh, or 15-55cm of circular mesh; the mode of coating the second wire mesh on the bundle sleeve is not particularly limited, and the second wire mesh can be sleeved or wound and wrapped; in order to further improve the safety performance of the product, the wire mesh can be formed into a wire mesh sleeve, and then the wire mesh sleeve is sleeved on the collar body, for the form of forming the wire mesh sleeve, the wire mesh sleeve can be designed in an integrated manner, and can also be in a connection manner, wherein the connection can adopt various existing fixed connection manners, for example, two ends of the second wire mesh are connected in a buckling manner to form the wire mesh sleeve coated on the collar body. Correspondingly, the first wire mesh can also be provided in accordance with the second wire mesh.

Example 1

With reference to fig. 1-2, a cable joint fire and explosion protection mechanism includes a collar for accommodating a cable joint, the collar is made of flexible fireproof material, the collar includes a collar body 11, the collar body is provided with an accommodating space 10 for accommodating the cable joint, a part of the collar body is folded to form a folded part 12, and the folded part is expanded under external force to increase the accommodating space; the bundle sleeve body is of a sleeve-shaped structure formed by enclosing flexible fireproof materials; the flaky flexible fireproof material is 3 layers of flexible fireproof fabric, namely a first flexible fireproof fabric layer 111, a second flexible fireproof fabric layer 112 and a third flexible fireproof fabric layer 113; each layer of flexible fireproof fabric is overlapped layer by layer and fixed into a whole; the wrinkled part comprises 3 layers of wrinkles; continuously stacking the folds layer by layer; the folds are arranged on the collar body along the axial direction of the collar body.

Example 2

The cable joint fireproof and explosion-proof mechanism is characterized in that two ends of a fold are connected with a bundle sleeve body in a sewing mode; two ends of the folds are sewn on the bundle sleeve body, the sewn line is in a shape like a Chinese character 'shan', and the rest structures and parameters are the same as those of the embodiment 1.

Example 3

A cable joint fire-proof and explosion-proof mechanism is characterized in that a bundle sleeve body is a sleeve-shaped structure formed by connecting two ends of a sheet-shaped flexible fireproof material together in a magic tape mode; the remaining structures and parameters were the same as those in example 2.

Example 4

A cable joint fire and explosion protection mechanism further comprises a first wire mesh and a second wire mesh, wherein the first wire mesh is arranged in the accommodating space of the bundle sleeve body and used for coating a cable joint; the second wire mesh is coated on the outer surface of the bundle sleeve body; the two ends of the second wire mesh are connected in a buckling mode to form a wire mesh sleeve coated on the bundle sleeve body, and the rest structures and parameters are the same as those of the embodiment 1.

Example 5

With reference to fig. 3, a cable joint fire and explosion protection mechanism, two ends of an explosion protection fabric body of the cable joint fire and explosion protection mechanism are connected together through a magic tape 13 (a male surface and a female surface of the magic tape are respectively arranged at two ends of the explosion protection fabric body, and the female surface of the male surface is not marked in the figure), so as to form a bundle sleeve 11 with an internal accommodating space 10, wherein the internal accommodating space is used for accommodating a cable joint; the remaining structure, connection relationship, and parameters were the same as those in example 1.

The magic subsides at explosion-proof surface fabric body both ends of this embodiment, the female face of magic subsides can set to the strip form of longer distance, just so public face can paste in the position that the female face is different, correspond, when using, can paste public face with the magic and paste to female face, select the position that can tighten up bundle cover body both ends face and laminate, like this, when using, can make this internal air of bundle cover less, the difficult entering bundle of cover of external air also, further can promote the fire behavior of the fire prevention explosion-proof mechanism of this invention.

The described embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a cable joint fire prevention explosion-proof mechanism which characterized in that: the fireproof and explosion-proof mechanism comprises a bundle sleeve used for accommodating a cable connector, the bundle sleeve is made of flexible fireproof materials and comprises a bundle sleeve body, the bundle sleeve body is provided with an accommodating space used for accommodating the cable connector, a part of the bundle sleeve body forms a folded part through folding, and the folded part expands under the action of external force to increase the accommodating space.

2. The cable splice fire and explosion protection mechanism of claim 1, wherein: the collar body is a sleeve-shaped structure formed by enclosing flexible fireproof materials.

3. The cable splice fire and explosion protection mechanism of claim 2, wherein: the flexible fireproof material comprises at least 2 layers of flexible fireproof fabric, each layer of flexible fireproof fabric is overlapped and fixed into a whole layer by layer, the flexible fireproof material is Kevlar aramid fiber fabric, silicon-titanium fireproof cloth, asbestos cloth, glass fiber cloth, carbon fiber cloth, ceramic fiber cloth, silica gel cloth, nanometer fireproof cloth and high silica fiber cloth, a plurality of layers of flexible fireproof fabric are covered with heat insulation materials, and the heat insulation materials are perlite.

4. The cable splice fire and explosion protection mechanism of claim 1, wherein: the fold part comprises at least 2 layers of folds, and the folds are continuously overlapped layer by layer.

5. The cable joint fire and explosion protection mechanism according to claim 4, wherein: the folds are arranged on the collar body along the axial direction of the collar body.

6. The cable joint fire and explosion protection mechanism according to claim 4, wherein: the two ends of the folds are connected with the bundle sleeve body in a sewing, buckling or fitting mode.

7. The cable joint fire and explosion protection mechanism according to claim 4, wherein: the two ends of the folds are sewn on the bundle sleeve body, and the sewn line is in a shape like a Chinese character 'shan', a Z 'or an M'.

8. The cable joint fire and explosion protection mechanism according to claim 1, wherein: the bundle sleeve body is cylindrical, the number of the fold parts is at least 2, the number of the fold parts is not more than 10, each fold part is arranged on the bundle sleeve body in a central symmetry mode, the width of each fold part is 50-200mm, the unfolding length of each fold part is 20-80% of the unfolding length of the bundle sleeve body, the diameter proportion of the bundle sleeve body with the fold parts before and after being unfolded is 100-350%, and the gap between the inner diameter of the bundle sleeve body and the outer diameter of the wrapped cable joint is 0-30 mm.

9. The cable joint fire and explosion protection mechanism according to any one of claims 1 to 8, wherein: the fireproof and explosion-proof mechanism further comprises a first metal wire mesh, the first metal wire mesh is arranged in the containing space of the bundle sleeve body and used for wrapping the cable joint, the mesh shape of the first metal wire mesh is rhombic or circular, the center distance of the metal mesh of the first metal wire mesh is 1-10cm, the first metal wire mesh is formed by weaving stainless steel wire ropes, the diameter of each stainless steel wire rope is 1-10mm, and the rope core of each stainless steel wire rope is one of hemp core, asbestos core and metal rope core.

10. The cable joint fire and explosion protection mechanism according to any one of claims 1 to 8, wherein: the fireproof and explosion-proof mechanism further comprises a second wire mesh, the second wire mesh is wrapped on the outer surface of the bundle sleeve body, the shape of meshes of the second wire mesh is rhombic or circular, the center distance of the wire meshes of the second wire mesh is 1-10cm, the second wire mesh is formed by weaving stainless steel wire ropes, the diameter of each stainless steel wire rope is 1-10mm, and the rope core of each stainless steel wire rope is one of hemp core, asbestos core and metal rope core.