CN215577761U

CN215577761U - High-temperature-resistant fireproof flexible cable for molten iron converter

Info

Publication number: CN215577761U
Application number: CN202121755294.0U
Authority: CN
Inventors: 王振金; 张信; 陈彦
Original assignee: Hunan Valin Wire and Cable Co Ltd
Current assignee: Hunan Valin Wire and Cable Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-01-18
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a high-temperature-resistant fireproof flexible cable for a molten iron converter, which comprises a cable core, a fireproof layer and an armor layer, wherein the fireproof layer is arranged on the outer side of the cable core, the armor layer is arranged on the outer side of the fireproof layer, the cable core is formed by twisting four inner cores and a plurality of inorganic flame-retardant ropes, each inner core comprises a conductor, an insulating layer arranged on the outer side of the conductor and a ceramic silicon rubber layer arranged on the outer side of the insulating layer, the fireproof layer is formed by lapping asbestos cloth, the armor layer is formed by weaving stainless steel wires, the conductor is formed by twisting 6 types of wires subjected to softening treatment, and the insulating layer is formed by lapping calcined mica tapes. The problem of for the converter cable fire resistance poor, can not play vertical tensile effect, the reel easily breaks when starting is solved.

Description

High-temperature-resistant fireproof flexible cable for molten iron converter

Technical Field

The utility model relates to the field of high-temperature cables, in particular to a high-temperature-resistant fireproof flexible cable for a molten iron converter.

Background

The transfer and dumping process of molten iron in the smelting process of the steel industry is generally carried out by adopting automatic equipment, the equipment is connected by adopting a reel flexible cable, and the model of the equipment is YC or CEFR. Because the environment is abominable, the slag of 1000 remainders penetrates four times, adopts asbestos sleeve protection mostly, even so, also need change once in 1 month, causes huge waste, disturbs the production progress. The existing cable has the following disadvantages:

1. the steel slag is not resistant to high temperature, the long-term temperature is higher than 100 ℃, the short-term temperature of steel slag adhesion reaches 1000 ℃, the rubber insulating material is aged and becomes brittle within one month, and the failure is caused by the loss of electricity.

2. The cable is not fireproof, and flame retardance and the like are not enough. When a large amount of steel slag is attached to the surface, flames are caused and extinguished for a long time, the service life of the cable is influenced, and even accidents such as fire, short circuit and the like occur all the time.

3. The cable has no vertical tensile structure. And the environment has the condition of vertically winding the incoming cable, and the cable is easy to be damaged by pulling and core breaking under the action of gravity.

4. The instantaneous tension when the reel is started often causes the sheath at the joint to be damaged by pulling, and the conductor is broken.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-temperature-resistant fireproof flexible cable for a molten iron converter, which aims to solve the problems that the cable for the converter is poor in fire resistance, cannot play a vertical tensile role and is easy to break when a winding drum is started.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a high temperature resistant fire prevention flexible cable for molten iron converter, includes cable core, flame retardant coating and armor, the flame retardant coating sets up in the cable core outside, the armor sets up in the flame retardant coating outside, the cable core is formed by four inner cores and a plurality of inorganic fire-retardant rope transposition, the inner core includes the conductor, sets up in the insulating layer in the conductor outside and sets up in the ceramic silicon rubber layer in the insulating layer outside, the flame retardant coating is formed around the package by asbestos cloth, the armor is woven by nonrust steel wire and is formed, the conductor is formed by 6 types of wire transposition through softening treatment, the insulating layer is formed around the package by calcining the mica tape.

As a further improvement of the above technical solution:

the monofilament diameter of the 6-type conductor is 0.2mm, and the stranding pitch-diameter ratio is 12-14 times.

The diameter of the stainless steel wire monofilament is not more than 0.2mm, and the weaving density is not less than 85%.

The weaving angle of the stainless steel monofilament gradually increases from the joint along the cable direction.

The weaving angle ranges from 20 to 50 degrees.

Compared with the prior art, the utility model has the beneficial effects that:

the high-temperature-resistant fireproof flexible cable for the molten iron converter is made of flexible materials or structures, ensures the flexibility of the flexible cable, and can be wound in a long-term winding working environment full of winding drums. The mica tape can be used at 500 ℃ for a long time, and the ceramic silicon rubber can be used at 180 ℃ for a long time. The long-term operation of the rubber insulating material is ensured, and the faults caused by aging, embrittlement and absolute electricity reduction are slowed down. The monofilament diameter of the stainless steel wire is not more than 0.2mm, and the weaving density is not less than 85%. The steel slag can not be ignited when attached, and even the fireproof asbestos on the inner layer in the tiny steel slag attached hole can play a role in fire resistance. Even if the whole cable is soaked in molten steel in an extreme case, the inner layer of the insulating ceramic silicon rubber immediately plays a role in blocking, and the cable can be normally used in a short time. The weaving angle of the stainless steel monofilament gradually increases from the joint along the cable direction. The braiding angle of the steel wires at the joint is 20 degrees, and the braiding angle gradually changes to 50 degrees along the cable direction. The phenomenon that the sheath at the joint is damaged by pulling and the conductor is broken due to instant pulling force generated when the winding drum is started can be prevented. The stainless steel wire has better bearing capacity. The vertical tensile strength is strong, and the whole stress is ensured to be uniform based on the knitted net structure. The instantaneous tension at the start can also be buffered.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Reference numerals: 1. a cable core; 2. a fire barrier layer; 3. an armor layer; 11. an inner core; 12. an inorganic flame-retardant cord; 111. a conductor; 112. an insulating layer; 113. a layer of ceramic silicone rubber.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the high temperature resistant fireproof flexible cable for the molten iron converter of this embodiment includes a cable core 1, a fireproof layer 2 and an armor layer 3, the fireproof layer 2 is disposed on the outer side of the cable core 1, the armor layer 3 is disposed on the outer side of the fireproof layer 2, the cable core 1 is formed by twisting four inner cores 11 and a plurality of inorganic flame retardant ropes 12, each inner core 11 includes a conductor 111, an insulating layer 112 disposed on the outer side of the conductor 111 and a ceramic silicone rubber layer 113 disposed on the outer side of the insulating layer 112, the fireproof layer 2 is formed by wrapping asbestos cloth, the armor layer 3 is formed by weaving stainless steel wires, the conductor 111 is formed by twisting 6 types of softened wires, taking a 35-square cable as an example, the diameter of a single wire is 0.2mm, and the twisting adopts a 12-14-fold pitch-diameter ratio. The insulating layer 112 is wrapped with a calcined mica tape. The whole cable is made of soft materials or structures, so that the flexibility of the cable is guaranteed, and the cable can be wound in a long-term winding working environment of a winding drum. The mica tape can be used at 500 ℃ for a long time, and the ceramic silicon rubber can be used at 180 ℃ for a long time. The long-term operation of the rubber insulating material is ensured, and the faults caused by aging, embrittlement and absolute electricity reduction are slowed down. The monofilament diameter of the stainless steel wire is not more than 0.2mm, and the weaving density is not less than 85%. Steel slag can not be ignited when attached, and even the fireproof asbestos on the inner layer in the tiny steel slag-attached hole can play a role in fire resistance (the steel slag with the energy less than 0.2mm is limited). And in an extreme case, the whole cable is soaked in molten steel, the inner layer of the insulating ceramic silicon rubber immediately plays a role in blocking, and the cable can be normally used in a short time. The weaving angle of the stainless steel monofilament gradually increases from the joint along the cable direction. The braiding angle of the steel wires at the joint is 20 degrees, and the braiding angle gradually changes to 50 degrees along the cable direction. The phenomenon that the sheath at the joint is damaged by pulling and the conductor is broken due to instant pulling force generated when the winding drum is started can be prevented. The stainless steel wire has better bearing capacity. The vertical tensile base has strong capacity, and the whole stress can be ensured to be uniform based on the woven net structure. The instantaneous tension at the start can also be buffered.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a high temperature resistant fire prevention flexible cable for molten iron converter, includes cable core (1), flame retardant coating (2) and armor (3), flame retardant coating (2) set up in cable core (1) outside, armor (3) set up in the flame retardant coating (2) outside, its characterized in that: cable core (1) is formed by four inner cores (11) and a plurality of inorganic fire-retardant rope (12) transposition, inner core (11) include conductor (111), set up in insulating layer (112) in the conductor (111) outside and set up in ceramic silicon rubber layer (113) in the insulating layer (112) outside, flame retardant coating (2) are formed around the package by the asbestos cloth, armor (3) are woven by the stainless steel wire and are formed, conductor (111) are formed by 6 types of wire transposition through softening treatment, insulating layer (112) are formed around the package by calcining the mica tape.

2. The high temperature resistant fireproof flexible cable for the molten iron converter according to claim 1, characterized in that: the monofilament diameter of the 6-type conductor is 0.2mm, and the stranding pitch-diameter ratio is 12-14 times.

3. The high temperature resistant fireproof flexible cable for the molten iron converter according to claim 2, characterized in that: the diameter of the stainless steel wire monofilament is not more than 0.2mm, and the weaving density is not less than 85%.

4. The high temperature resistant fireproof flexible cable for the molten iron converter according to claim 3, characterized in that: the weaving angle of the stainless steel monofilament gradually increases from the joint along the cable direction.

5. The high temperature resistant fireproof flexible cable for the molten iron converter according to claim 4, characterized in that: the weaving angle ranges from 20 to 50 degrees.