CN105374459A

CN105374459A - Non-toxic harmless and pollution-free power cable with long control period for preventing termites

Info

Publication number: CN105374459A
Application number: CN201510816433.9A
Authority: CN
Inventors: 不公告发明人
Original assignee: ZHEJIANG CHANGTAI POWER CABLE CO Ltd
Current assignee: ZHEJIANG CHANGTAI POWER CABLE CO Ltd
Priority date: 2015-11-23
Filing date: 2015-11-23
Publication date: 2016-03-02

Abstract

The invention discloses a non-toxic harmless and pollution-free power cable with a long control period for preventing termites. The power cable comprises conductors, wherein a shielding layer, an insulating layer and an insulating shielding layer extrude and wrap the outside of each conductor; a copper strip shield covers the outside of each insulating layer; a plurality of wire cores and packing are twisted into the cable and are fastened by non-woven fabrics; a layer of isolation sleeve extrudes and wraps the outside of the non-woven fabrics; a steel wire armored layer is added to the outside of the isolation sleeve; and a nylon 12 sheathing compound and termigon, namely a special polyolefin material sequentially extrude and wrap the outside of the armored layer. The method is applicable to control on termite damages by the power cable in short overhead installation and vertical installation environments. The termite control target and the non-toxic harmless and pollution-free environmental protection effect are achieved by a physical control method. Double protection layers protect each other and fill in gaps, so that the target of prolonging the control period is reached.

Description

Nontoxic unpollution control methods phase long Anti-termite power cable

Technical field

The present invention relates to power cable, belong to that short distance is built on stilts lays or vertical laying control termites power cable.

Background technology

Termite is kind of a realm biology, mainly south is distributed in China, northeast and heat wait mountain area, a termite queen can breed 1,000,000 termites, breed swift and violent degree to increase with geometry number grade, global per capita about 0.4 ton of termite statistics, along with social development, electrical network perfect, termite increases rapidly, in looking for food and nesting, have very big infringement to cable; According to statistics, cable fault is caused to account for cable fault sum about 70% in south China area because of termite moth erosion cable.

Mostly conventional anti-termite cable is the chemical prevention and control method adopting the medicines such as dieldrite, drinox, lindane, although prevention effect is good, toxicity is large, and long-time use can enter food chain and cause biological pollution, harm animal and the mankind; Adopt physical control method and the low toxicity cypermethrin similar drugs such as epoxy acids, capsicim, reduce harm but the control phase short and can only reach and prevent and treat grade 2 grades; Though modification stiffened PVC sheath effect is good but due to the little easy fracture of elongation at break, bending radius is more very much not suitable for heavy in section power cable, makees sheath turn increase cost with multilayer sacrifice layer; Laying or vertical laying because to lay environment be that short distance is built on stilts, can there is tension force and metallic sheath cannot be used to prevent and treat in cable surface.

Chinese patent " rat-proof termite-proof low-smoke low-halogen leadless flame-retardant control cable for elevator shaft " (application number is 201110253336.5) discloses a kind of anti-termite cable, the termite-proof technical scheme taked is: improved PVC oversheath raw material, add cypermethrin low toxicity anti-termite agent and capsicim.Stimulation can be played when mouse and termite bite oversheath to walk quickly and keep away and toxic action; Said method is based upon when breaking sheath by the teeth to reach the effect of walking quickly and keeping away and killing to termite and mouse, but oversheath breakage can cause capsicim oxidation deactivation reduction in time protection effect, and cypermethrin class medicament also can be diffused in environment, can not reach the effect of nontoxic long control.

Chinese patent " a kind of nontoxic Anti-termite power cable " (application number is 201210181244.5) discloses a kind of anti-termite cable, the termite-proof technical scheme adopted is: put up under oversheath and be provided with annular and the galvanized steel strip of longitudinal fold or aluminium alloy as armour, this technical scheme is similar to the termite-proof scheme of brass band lock armo, termite cannot be bitten and reaches the object of protection; But make somebody a mere figurehead for needing short distance and lay or the power cable of vertical laying, due to longitudinally can stress be there is, can only wire armoring be used, therefore the method has limitation.

Chinese patent " a kind of large gauge environmental protection block water the termite-proof reinforced high-tension cable of protection against rodents " (application number is 201410540438.9) discloses a kind of protection against rodents anti-termite cable, the guard technology scheme adopted extrudes 4 layers of restrictive coating at Exterior cable, secondary skin adopts nylon 12 material, all the other each layers are PVC5V-90 material, though waterproof lay under environment with its hardness of nylon 12 sheath and the termite-proof effect of nibbling of smoothness good, but under facing built on stilts and vertical laying environment, after considering that outer jacket destroys, due to the factor such as Ultraviolet radiation and longitudinal stress, list only protects with one deck thin nylon 12 restrictive coating, aging and be full of cracks can be comparatively early there is within the cable cycle of operation, long control effect cannot be reached for southern termite very high density area.

Summary of the invention

In order to overcome above-mentioned defect and puzzlement, the invention provides a kind of nontoxic unpollution control methods phase long Anti-termite power cable, comprise conductor (1), in described conductor (1) outside by three-layer co-extruding machine head coating conductor screen (2) successively, insulating barrier (3) and insulation screen (4), then wrapped copper strip shielding (5) is made to core, by some heart yearns twisted synthesizing cable at outside double end wrapped nonwoven fabrics band (7) fastening structure together with filling (6), isolation jacket layer (8) is extruded outside described nonwoven fabrics band (7), in described isolation jacket layer (8) steel wire armor layer (9) in addition outward, inner restrictive coating (10) is extruded outside described steel wire armor layer (9), external sheath layer (11) is extruded outside described inner restrictive coating (10).

Lay and vertical laying for solving inadaptable the making somebody a mere figurehead of steel-tape armouring, described steel wire armor layer (9) is zinc-coated wire armour.

Irradiate and cause oversheath aging for solving long term ultraviolet and can not reach the problem of long control termite, described inner restrictive coating (10) is high rigidity nylon 12 inner restrictive coating.

Lose and reach prevent and treat grade 1 requirement for thoroughly solving termite moth, described external sheath layer (11) moves back deinsectization for Termigon() 3 generations special type polyolefin external sheath layer.

The invention has the beneficial effects as follows: adopt such scheme can make cable under the unfavorable conditions of aging existence, still can reach the feature of length of nontoxic unpollution control methods phase.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention

In accompanying drawing 1,1-conductor 2-conductor shield 3-insulating barrier 4-insulation screen 5-copper strip shielding 6-fills 7-nonwoven fabrics band 8-and isolates jacket layer 9-steel wire armor layer 10-inner restrictive coating 11-external sheath layer.

Embodiment

Following those set forth further describes of the present invention, and any way not departing from the superficial reform of control termites content of the present invention to change the modes such as cable applications all relates to of the present invention.

As shown in Figure 1, in described conductor (1) outside by three-layer co-extruding machine head coating conductor screen (2) successively, insulating barrier (3) and insulation screen (4), then wrapped copper strip shielding (5) is made to core, by some heart yearns twisted synthesizing cable at outside double end wrapped nonwoven fabrics band (7) fastening structure together with filling (6), isolation jacket layer (8) is extruded outside described nonwoven fabrics band (7), in described isolation jacket layer (8) steel wire armor layer (9) in addition outward, inner restrictive coating (10) is extruded outside described steel wire armor layer (9), external sheath layer (11) is extruded outside described inner restrictive coating (10).

The present invention adopts two high hard sheath material to carry out long control termite, main enforcement technology is: inner restrictive coating adopts nylon 12 material, but not the materials such as other such as nylon 6, nylon66 fiber, it is lower that this material has fusing point, fusing point is 170-180 DEG C, and processability is good, resistance to wear is excellent and have self-extinguishment; External sheath layer adopts Termigon3 generation ideal at present to move back the extraordinary polyolefine material of deinsectization high rigidity, hardness is up to shore D67, smooth surface, mechanical performance and electrical property excellent, ensure the moth erosion of nibbling that can be good at stopping termite while cable normally runs, it is outside that this layer is positioned at nylon 12 restrictive coating, solves again a difficult problem for nylon material not easily lettering.

External sheath layer plays certain protective effect because can be internal layer shield portions ultraviolet when the aging infringement of the irreversibilities such as Ultraviolet radiation is sacrificed; and inner restrictive coating nylon 12 material has high rigidity; high glossy characteristic; can continue the performance bearing external sheath layer control termites equally, reach the object of long control.

Claims

1. a nontoxic unpollution control methods phase long Anti-termite power cable, comprise conductor (1), in described conductor (1) outside by three-layer co-extruding machine head coating conductor screen (2) successively, insulating barrier (3) and insulation screen (4), then wrapped copper strip shielding (5) is made to core, by some heart yearns twisted synthesizing cable at outside double end wrapped nonwoven fabrics band (7) fastening structure together with filling (6), isolation jacket layer (8) is extruded outside described nonwoven fabrics band (7), in described isolation jacket layer (8) steel wire armor layer (9) in addition outward, inner restrictive coating (10) is extruded outside described steel wire armor layer (9), external sheath layer (11) is extruded outside described inner restrictive coating (10).

2. a kind of nontoxic unpollution control methods phase long Anti-termite power cable according to claim 1, is characterized in that: described steel wire armor layer (9) is zinc-coated wire armour.

3. a kind of nontoxic unpollution control methods phase long Anti-termite power cable according to claim 1, is characterized in that: described inner restrictive coating (10) is high rigidity nylon 12 inner restrictive coating.

4. a kind of nontoxic unpollution control methods phase long Anti-termite power cable according to claim 1, is characterized in that: described external sheath layer (11) moves back deinsectization for Termigon() 3 generations extraordinary polyolefin external sheath layer.