CN206134340U - Insulating fire -resistant electric wire of high fire -retardant polyvinyl chloride - Google Patents

Abstract

The utility model discloses an insulating fire -resistant electric wire of high fire -retardant polyvinyl chloride, including the modified fire -retardant PVC insulating layer of aluminium hydroxide, fire -resistant mica layer, conductive core, the outside of applying at conductive core is wrapped up in in proper order to the modified fire -retardant PVC insulating layer of fire -resistant mica layer and aluminium hydroxide. The utility model has the advantages of good heat stability, higher mechanical strength, surface strength, bending strength, corrosion resistance. PVC not only has insulating properties, itself still have high temperature resistance can, can be 210 DEG C under and the nondiscoloration, fire retardant aluminium hydroxide adds, further improve its high temperature resistance ability, the nontoxic environmental protection of aluminium hydroxide moreover, the mica can endure high temperature more than 1000 DEG C, through PVC layer and mica layer dual layer protection, further improves the security performance of cable.

Description

A kind of high flame retardant polyvinyl chloride insulated fireproof electric wire

Technical field

This utility model belongs to technical field of electric wires and cables, and in particular to a kind of high flame retardant polyvinyl chloride insulated fireproof electricity Line.

Background technology

The purposes of cable has a lot, is mainly used in controlling installation, connection equipment, the multiple action such as transmit electric power, and is daily Common and indispensable a kind of thing in life.It is skyscraper, hotel, large-scale with the sharp increase of urban population Supermarket, hospital, station, airport are continuously increased, the personnel such as subway, tunnel and large-scale place of public amusement, public transit facility Intensive occasion is being sharply increased, and especially skyscraper, even more in full flourish.In the last few years, fire caused a lot of human lifes The heavy losses of property, the people have more deep understanding to fire safety.There is concrete on fire in common cable, it is impossible to ensure Circuit normal power supply, cause elevator, emergency lighting, automatic alarm and disaster relief system etc. cannot normal work, rescue evacuate extremely It is difficult.With the raising that people's fire-fighting is realized, that what is regained consciousness recognizes that employing can guarantee to supply distribution wire in fire environment Road keeps the importance of power supply.In particular how in case of fire, the smooth of electric power and communication line is ensured within a certain period of time It is logical, try to gain time precious to one to greatest extent, it is beneficial to the rescue of fire and fleeing from and evacuating for personnel, reduce the injures and deaths of personnel It is the continuous problem explored of people with the loss of lives and properties.In order to improve the safe class of electric appliance circuits, electrical fire is reduced The generation of accident and loss Minstry of Housing and Urban-Rural Development of People Republic of China (MOHURD), the Ministry of Public Security and some local governments have promulgated some electrical design specifications in succession, And clear stipulaties preferably adopt fire-resisting cable in some important electric appliance circuits or place, China and other countries of the world to it is fire-retardant, The demand of fire-resistant wire and cable product is in rising trend year by year, and the especially increase in demand to fire-resisting cable is even more, in a word In order to ensure the security against fire problem of the important events such as public place should be widelyd popularize from fire resistant flame retardant, LSZH to environment Free of contamination fire-resisting cable.

The characteristics of for high temperature flame-proof mica tape：The material for constituting fire-resistant isinglass belt is mica paper, binding agent and glass fiber Band.What currently on the market prevalence was used has two kinds：Phlogopite fire resistant belt and synthetic mica fire resistant belt, the at normal temperatures electricity of white mica Performance is better than phlogopite, but in terms of thermostability, phlogopite is better than white mica：White mica can discharge it more than 600 DEG C Water of crystallization, and phlogopite will be to more than 800 DEG C.But its layer structure can be always maintained at fusing point (1200～1300 DEG C). From security consideration, make that fire-resistant isinglass belt is relatively good of phlogopite, the quality of Muscovitum is uneven, can meet using will Ask, Preliminary Identification can first be made using following simple and easy method：Mica tape handss kneading, such as soft, doubling is not stratified, and (or on blue internal flame of lighter) burning on the flame of alcohol burner, Muscovitum belt surface is not in black (carbon for white powder Change), then it is believed that basically available.This conductor is circle, and fire-resistant isinglass belt can be wrapped on its surface well, and for fan-shaped or Semicircular conductor, due to there is a corner angle, fire-resistant isinglass belt be difficult snugly it is wrapped in its surface, when sample is more than 750 DEG C Under flame interaction, mica layer can expanded by heating, the wrapped mica tape degrees of expansion on round conductor is roughly the same, and it is wrapped Mica tape expanded by heating on fan-shaped or semicircular conductor is inconsistent, easily produces explosion in edges and corners, makes cable be short-circuited Puncture.The material for constituting fire-resistant isinglass belt is mica paper, binding agent and glass wool cloth.The selection of binding agent must be with bonding force By force, soft and burning not carbonization is principle, and three is indispensable.Therefore the epoxy resin for being commonly used for Mica Tape Adhesive cannot It is competent at and special heat-resisting organic siliconresin adhesive must be selected.Must particularly point out here：Burning not carbonization to close weight Will.Because mica paper is formed by the mica powder system of copying, it is difficult to ensure that without hole or micropore, when binding agent is it and glass fiber When cloth is bonded, binding agent can be penetrated in hole or micropore, if burning carbonate, just become conductive passage.And it is flame proof electrical The organic siliconresin adhesive of cable speciality, generates the white SiO of powdery after burning₂, then have good electrical insulation capability.This Organic siliconresin adhesive is planted, current China still needs to rely in import.The plain of E glass fibre making is also adopted by China, is claimed For alkali-free glass fiber cloth.In sum, from phlogopite paper, organic siliconresin adhesive and alkali-free glass wool cloth, Jing gluings, The fire-resistant isinglass belt of required specification is cut into again in bonding, baking, so that it may for making the flame retardant coating of fire-resisting cable.

Utility model content

For the deficiencies in the prior art, this utility model provides a kind of high flame retardant polyvinyl chloride insulated fireproof electric wire, has High temperature resistant fire resistance is strong, the advantages of long service life.

The technical solution adopted in the utility model is as follows：

A kind of high flame retardant polyvinyl chloride insulated fireproof electric wire, including Modified by Aluminum Hydroxide flame-proof PVC insulating barrier, fireproof mica Layer, conductor wire core, the fireproof mica layer and Modified by Aluminum Hydroxide flame-proof PVC insulating barrier are wrapped up in apply in the outer of conductor wire core successively Face.

Preferably, the conductor wire core is copper conductor.

Preferably, the conductor wire core is single conductor core.

Preferably, the fireproof mica thickness degree is 0.2mm.

Preferably, the Modified by Aluminum Hydroxide flame-proof PVC thickness of insulating layer is 0.12mm.

Beneficial effect：

(1) this utility model has excellent heat stability, higher mechanical strength, surface strength, bending strength, corrosion resistant The advantages of corrosion.

(2) PVC not only have insulating properties, itself also have resistance to elevated temperatures, can the invariant color at 210 DEG C, add Fire retardant aluminium hydroxide, further improves its resistance to elevated temperatures, and aluminium hydroxide asepsis environment-protecting, and Muscovitum can tolerate 1000 DEG C High temperature above, by layer of PVC and mica layer double shielding, further improves the security performance of cable.

Description of the drawings

Fig. 1 is this utility model structure single cotton covered wire structural representation；

Fig. 2 is this utility model sectional view.

Wherein, 1, Modified by Aluminum Hydroxide flame-proof PVC insulating barrier, 2, fireproof mica layer, 3, conductor wire core.

Specific embodiment

Below in conjunction with the accompanying drawings this utility model is further described in detail by specific embodiment, but is not limited to this.

Embodiment 1

As shown in Figure 1, 2, a kind of high flame retardant polyvinyl chloride insulated fireproof electric wire, including Modified by Aluminum Hydroxide flame-proof PVC is exhausted Edge layer 1, fireproof mica layer 2, conductor wire core 3, the fireproof mica layer 2 and Modified by Aluminum Hydroxide flame-proof PVC insulating barrier 3 are wrapped up in successively Apply in the outside of conductor wire core 1, the conductor wire core is copper conductor single conductor core；The fireproof mica thickness degree is 0.2mm； The thickness of Modified by Aluminum Hydroxide flame-proof PVC insulating barrier 1 is 0.12mm, it is addition 60g aluminium hydroxide in every 100gPVC, it is matched somebody with somebody It is than open source literature：The surface of aluminium hydroxide fire retardant is modified and its application [J] in soft PVC. fine oil Work, 2008,25 (2)：29-31.

Product structure：Using fine copper anaerobic core+bilayer fire-resistant isinglass belt+high-quality high fire-retardance Insulation Material structure.

Copper conductor：Copper core produces high purity oxygen free copper using best river copper its good quality in Asia, goes sightseeing outside copper cash Bright, resistivity is low, safe with good electric conductivity.

Fireproof mica layer (adopts gold mica tape)：With good fire resistance, resistance to acids and bases and anti-corona, radiation-resistant spy Property, and have fine flexibility and tensile strength, it is suitable for high speed wrapped.

Modified by Aluminum Hydroxide flame-proof PVC insulating barrier：Its proportioning is addition 60g aluminium hydroxide in every 100gPVC, and its proportioning is public Opening document is：The surface of aluminium hydroxide fire retardant is modified and its application [J] in soft PVC. Speciality Petrochemicals, 2008,25 (2)：29-31.Poor with good toughness and heat transfer property using high fire-retardance lead-free PVC insulating barrier, oxygen index (OI) is high, With fire-retardant self-extinguishment, burning things which may cause a fire disaster is effectively intercepted, prevent the generation of electrical fire accident, heat resistance and resistance to chemical corrosion. In construction both can surface, can secretly spread on again in concrete and brick wall, it is safe and reliable.

This utility model is different from common cable, topmost to be that it increases a flame retardant coating.The flame retardant coating generally sets Put between conductor and insulation.It is not difficult to envision, once burned, constituting all organic materials of cable will be translated into ash to cable Cinder, and be intended to keep " circuit integrity ", what is leaned on is exactly this " flame retardant coating ".Therefore, flame retardant coating is nearly all with " gold mica tape " To make.This utility model can be used for fire hydrant in building, water spray, spraying, foam, carbon dioxide and powder fire extinguisher etc. and disappear Anti- equipment, urgent alarm bell, automatic alarm, broadcasting equipment, fume extractor, display lamp, radio communication auxiliary equipment etc. it is urgent Power circuit.Main Function is that when there is fire, circuit remains to keep the energization of certain hour, is easy to fire-fighting and rescue (state Mark regulation：950～1000 DEG C, 90 minutes of A levels；750～800 DEG C, 90 minutes of B levels).

Claims (3)

1. a kind of high flame retardant polyvinyl chloride insulated fireproof electric wire, it is characterised in that including Modified by Aluminum Hydroxide flame-proof PVC insulating barrier, Fireproof mica layer, conductor wire core, the fireproof mica layer and Modified by Aluminum Hydroxide flame-proof PVC insulating barrier are wrapped up in apply in conductor wire successively The outside of core, the conductor wire core is copper conductor, and the conductor wire core is single conductor core.

2. high flame retardant polyvinyl chloride insulated fireproof electric wire according to claim 1, it is characterised in that the fireproof mica layer Thickness is 0.2mm.

3. high flame retardant polyvinyl chloride insulated fireproof electric wire according to claim 1, it is characterised in that the aluminium hydroxide changes Property flame-proof PVC thickness of insulating layer be 0.12mm.