CN212782792U - Flame-retardant compensation cable - Google Patents

Abstract

The utility model discloses a fire-retardant compensating cable, its technical scheme main points are: the cable comprises a plurality of cable cores, wherein the cable cores are formed by mutually twisting a plurality of groups of wire group units, each wire group unit is formed by wrapping a wrapping layer in a wrapping manner after two groups of conductors are twisted in pairs, an insulating layer is wrapped outside each conductor, an outer wrapping layer is wrapped outside each cable core, the middle part of each cable core is provided with an elastic supporting piece, each elastic supporting piece comprises a tensile layer, an elastic filler and an insulating protection layer, each tensile layer is formed by twisting a plurality of fiber composite cores, each elastic filler is made of isoprene rubber, each insulating protection layer is made of silicon rubber, a shielding layer is wrapped outside each outer wrapping layer, a fireproof layer is wrapped outside each shielding layer, the fireproof layer is made of polyester thermoplastic elastomer, an armor layer is wrapped outside each fireproof layer, and a sheath layer; the utility model provides a current compensation cable its tensile strength relatively poor and the poor problem of fire behavior.

Description

Flame-retardant compensation cable

Technical Field

The utility model belongs to the technical field of the compensating cable technique and specifically relates to a fire-retardant compensating cable.

Background

The compensation cable is a pair or a plurality of pairs of cables with insulating layers, which have the same thermal electromotive force value as the matched thermocouple in a certain temperature range (including normal temperature), and the compensation cable is used for connecting the thermocouple and the measuring device so as to improve the temperature measurement precision. The device is suitable for single-point or multi-point connection of automatic temperature measuring instruments in industries such as electric power, metallurgy, petroleum, chemical engineering, light textile and the like and departments such as national defense, scientific research and the like.

However, in the actual use process, the general compensation cable has poor tensile property, and is easy to have the problems of cable breakage and the like, thereby causing accidents such as short circuit and the like; and the common compensation cable adopts polyvinyl chloride as an insulating layer and a sheath layer, has poor temperature resistance and fire resistance, contains halogen, is easy to generate thick smoke and polluting gas during combustion, and has no environmental protection property.

SUMMERY OF THE UTILITY MODEL

To the problem of mentioning in the background art, the utility model aims at providing a fire-retardant compensation cable to solve the problem that its tensile property of the current compensation cable of mentioning in the background art is relatively poor and the fire behavior is poor.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a flame-retardant compensation cable comprises a plurality of cable cores, wherein each cable core is formed by mutually twisting a plurality of groups of wire group units, each wire group unit is formed by oppositely twisting two groups of conductors and then wrapping a wrapping layer in the wrapping layer, an insulating layer is wrapped outside each conductor, an outer wrapping layer is wrapped outside each cable core, the middle part of each cable core is provided with an elastic supporting piece, each elastic supporting piece comprises a tensile layer, an elastic filler and an insulating protective layer, each elastic filler is arranged between the tensile layer and the corresponding insulating protective layer, each tensile layer is formed by repeatedly twisting a plurality of fiber composite cores, each elastic filler is made of isoprene rubber materials, each insulating protective layer is made of silicon rubber materials, a shielding layer is wrapped outside each wrapping layer, a fireproof layer is wrapped outside each shielding layer, each fireproof layer is made of polyester thermoplastic elastomers, an armor layer is wrapped outside each fireproof layer, a sheath layer is wrapped outside each armor layer, and a first, and a second filler is arranged between the inner wrapping layer and the outer wrapping layer.

Furthermore, the conductor is made of oxygen-free copper.

By adopting the technical scheme, the conductor can be ensured to have good conductivity.

Furthermore, the insulating layer is made of ceramic silicon rubber.

By adopting the technical scheme, the ceramic silicon rubber is an organic silicon polymer composite material, and compared with a common material, the material has higher high-temperature resistance and fire resistance.

Further, the inner wrapping layer and the outer wrapping layer are flame-retardant glass fiber belts.

By adopting the technical scheme, the glass fiber belt has higher fire resistance.

Furthermore, the shielding layer is a copper strip, a copper wire mesh grid or a tinned copper wire mesh grid.

Through adopting above-mentioned technical scheme, make the utility model discloses possess stronger shielding external signal interference's ability.

Further, the armor layer is a galvanized steel wire braid layer.

Through adopting above-mentioned technical scheme, can play good protection and supporting role to the cable.

Furthermore, the sheath layer is made of a phenylene silicone rubber material.

By adopting the technical scheme, the components of the supporting silicon rubber are equal to various components of the insulating material, the halogen-free, low-smoke and flame-retardant properties of the cable are fully considered, the cable has excellent flame-retardant property, the smoke quantity is low during combustion, and no harmful effect is caused to surrounding personnel and equipment.

Furthermore, the first filler and the second filler are made of ceramic fiber cotton materials.

By adopting the technical scheme, the ceramic fiber is a high-efficiency heat-insulating material and has the characteristics of light weight, high strength, oxidation resistance, low heat conductivity, good flexibility, corrosion resistance, small heat capacity, sound insulation and the like.

To sum up, the utility model discloses mainly have following beneficial effect:

1. the utility model discloses a, be provided with elastic support piece through the middle part at the cable, be provided with the tensile layer at elastic support piece's middle part, the tensile layer is stranded again for the compound core of stranded fibre and forms, can show the tensile strength who improves the cable, with a plurality of group unit settings between elastic support piece and outer winding covering, when the cable received the extrusion, the inside elastic filler who sets up of elastic support piece can play good buffering supporting role to the group unit, has further guaranteed the reliability that the cable used.

2. The utility model discloses a, through setting up the flame retardant coating in the inside of cable, the material of flame retardant coating is polyester thermoplastic elastomer, polyester thermoplastic elastomer has good high temperature resistance characteristic, can guarantee that the cable is difficult for burning, the insulating layer uses ceramic silicon rubber simultaneously, the restrictive coating uses the phenylene silicon rubber material to make, fully considered the cable halogen-free, low cigarette, fire behaviour, not only have good fire behaviour, the smoke volume is low when burning in addition, no harmful effects to personnel and equipment on every side.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a conductor; 2. an insulating layer; 3. an inner wrapping layer; 4. an outer wrap cladding; 5. an elastic support member; 501. a tensile layer; 502. an elastic filler; 503. an insulating protective layer; 6. a shielding layer; 7. a fire barrier layer; 8. an armor layer; 9. a sheath layer; 10. a first filler; 11. a second filler.

Detailed Description

In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1, a flame-retardant compensation cable comprises a plurality of cable cores, each cable core is formed by twisting a plurality of groups of wire group units, each wire group unit is formed by twisting two groups of conductors 1 in pairs and wrapping an inner wrapping layer 3, an insulating layer 2 is wrapped on the outer side of each conductor 1, an outer wrapping layer 4 is wrapped on the outer side of each cable core, an elastic support 5 is arranged in the middle of each cable core, each elastic support 5 comprises a tensile layer 501, an elastic filler 502 and an insulating protective layer 503, the elastic filler 502 is arranged between the tensile layer 501 and the insulating protective layer 503, the tensile layer 501 is formed by twisting a plurality of fiber composite cores, the specific gravity of each composite core is only 1/4 of steel wires, so that the body weight of the cable is reduced, the tensile strength of the whole cable is improved, the elastic filler 502 is made of isoprene rubber, the isoprene rubber is the same as natural rubber, and has good elasticity and wear resistance, good heat resistance, insulating inoxidizing coating 503 adopts the silicon rubber material to make, silicon rubber has good high temperature resistant and electrical insulation performance, the outside cladding of outer covering 4 has shielding layer 6, the outside cladding of shielding layer 6 has flame retardant coating 7, the material of flame retardant coating 7 is polyester thermoplastic elastomer, the outside cladding of flame retardant coating 7 has armor 8, the outside cladding of armor 8 has restrictive coating 9, it is provided with first filler 10 to wind between covering 3 and insulating layer 2 in, it is provided with second filler 11 to wind between covering 3 and the outer covering 4 outward to wind in.

Referring to fig. 1, the material of the conductor 1 is oxygen-free copper.

Referring to fig. 1, the insulating layer 2 is made of ceramic silicon rubber.

Referring to fig. 1, the inner wrapping layer 3 and the outer wrapping layer 4 are made of flame-retardant glass fiber tapes, and the wrapping and covering rate is not less than 30%.

Referring to fig. 1, the shielding layer 6 is a copper strip, a copper wire mesh grid or a tinned copper wire mesh grid, and the weaving density of the shielding layer 6 is not less than 85%.

Referring to fig. 1, armor layer 8 is a galvanized steel wire braid.

Referring to fig. 1, the sheath layer 9 is made of a phenylene silicone rubber material.

Referring to fig. 1, the first filler 10 and the second filler 11 are made of a ceramic fiber wool material.

When the utility model is used, the elastic support member 5 is arranged in the middle of the cable, the tensile layer 501 is arranged in the middle of the elastic support member 5, the tensile layer 501 is formed by twisting a plurality of fiber composite cores, the tensile property of the cable can be obviously improved, a plurality of wire group units are arranged between the elastic support member 5 and the outer winding layer 4, when the cable is extruded, the elastic filler 502 arranged in the elastic support member 5 can play a good role in buffering and supporting the wire group units, and the use reliability of the cable is further ensured; through the inside at the cable set up flame retardant coating 7, the material of flame retardant coating 7 is polyester thermoplastic elastomer, polyester thermoplastic elastomer has good high temperature resistance characteristic, can guarantee that the cable is difficult for burning, insulating layer 2 uses ceramic silicon rubber simultaneously, this material is an organosilicon polymer composite, this material compares with ordinary material, high temperature resistance and fire resistance are higher, restrictive coating 9 uses the phenylene silicon rubber material to make, this material composition is equivalent to the various compositions of insulating material, fully considered the halogen-free of cable, low smoke, fire behaviour, not only have good fire behaviour, and smoke volume is low during the burning, there is not harmful effect to personnel and equipment on every side.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a fire-retardant compensating cable, includes many cable cores, its characterized in that: the cable core is formed by mutually twisting a plurality of groups of wire group units, each wire group unit is formed by winding a winding layer (3) in a winding package after two groups of conductors (1) are twisted in pairs, an insulating layer (2) is wrapped outside the conductors (1), an outer winding layer (4) is wrapped outside the cable core, an elastic supporting piece (5) is arranged in the middle of the cable core, each elastic supporting piece (5) comprises a tensile layer (501), an elastic filler (502) and an insulating protective layer (503), the elastic filler (502) is arranged between the tensile layer (501) and the insulating protective layer (503), the tensile layer (501) is formed by repeatedly twisting a multi-strand fiber composite core, the elastic filler (502) is made of isoprene rubber materials, the insulating protective layer (503) is made of silicon rubber materials, and a shielding layer (6) is wrapped outside the outer winding layer (4), the outside cladding of shielding layer (6) has flame retardant coating (7), the material of flame retardant coating (7) is polyester thermoplastic elastomer, the outside cladding of flame retardant coating (7) has armor (8), the outside cladding of armor (8) has restrictive coating (9), in around covering (3) with be provided with first filler (10) between insulating layer (2), in around covering (3) with be provided with second filler (11) outward around between covering (4).

2. A flame retardant compensation cable according to claim 1 wherein: the conductor (1) is made of oxygen-free copper.

3. A flame retardant compensation cable according to claim 1 wherein: the insulating layer (2) is made of ceramic silicon rubber.

4. A flame retardant compensation cable according to claim 1 wherein: the inner wrapping layer (3) and the outer wrapping layer (4) are flame-retardant glass fiber tapes.

5. A flame retardant compensation cable according to claim 1 wherein: the shielding layer (6) is a copper strip, a copper wire mesh grid or a tinned copper wire mesh grid.

6. A flame retardant compensation cable according to claim 1 wherein: the armor layer (8) is a galvanized steel wire braid layer.

7. A flame retardant compensation cable according to claim 1 wherein: the sheath layer (9) is made of phenylene silicon rubber materials.

8. A flame retardant compensation cable according to claim 1 wherein: the first filler (10) and the second filler (11) are made of ceramic fiber cotton materials.

Images