CN2166548Y

CN2166548Y - Flexible protective bushing for electric wire & cable

Info

Publication number: CN2166548Y
Application number: CN 93242618
Authority: CN
Inventors: 张福天
Original assignee: Liaoning No3 Radio Factory
Current assignee: Liaoning No3 Radio Factory
Priority date: 1993-10-25
Filing date: 1993-10-25
Publication date: 1994-05-25
Anticipated expiration: 2003-10-25

Abstract

The utility model relates to a flexible protective casing tube for electric wires and cables, comprising a water-proof paper layer, a band steel layer, and a hot dip galvanizing band steel floor which are tightly wound. The other form exists under the environment of the high requirement for damp prevention and water prevention; a polyvinyl chloride layer is covered on the outermost layer. The utility model has the advantages of light weight, material saving, labor saving, easy bending, and easy construction and can be applied to the electric wire and cable construction in which the trend is complex and the environment is damp. The utility model is used as the convenient, practical, and economical construction equipment, can be used for building and every department of the national economy and effectively uses the resource.

Description

Flexible protective bushing for electric wire & cable

The utility model relates to a kind of protection tube that is used for electric wire, cable, particularly a kind of flexible protection tube (being called the pulika sleeve pipe).

At present, the general employing of the protection tube of electric wire and cable is the steel pipe.For enterprise of integrated mill, complex engineering equipment and various building, the trend of its electric wire, cable is also corresponding to be complicated, and it is big to install difficulty, need expend great amount of manpower and material resources.In addition, because the protection steel pipe is had the anti-corrosive properties requirement, steel pipe needs thicker, and weight is big, the waste steel.Connection between the steel pipe wants Pick Wire to buckle, and interface is not noted staying burr, easily stabs wire outer skin.Especially to electric wire, the cable of line alignment bending, it is difficult more that the bending of sleeve pipe just seems.

The purpose of this utility model be overcome above-mentioned protective casing defective, providing a kind of has flexiblely, can better protect the sleeve pipe of electric wire, cable.It can not only simplify the electric wiring engineering, reduces labour intensity, shortens the engineering time, and since its pliability can be applied in all electric wires that move towardss complexity, the cable construction.

The purpose of this utility model is achieved in that what the protective casing (pulika sleeve pipe) of electric wire, cable was made by the band steel of wet-strong paper, band steel, galvanizing by dipping.The protective casing that is used for outdoor and moist place is that the outermost layer at above-mentioned sleeve pipe coats the soft watertight composition polyvinyl chloride of one deck (being called water proof type pulika sleeve pipe) again.

The utility model has following advantage owing to adopt said structure:

1, save steel, in light weight, only be 1/4th of existing coating steel pipe.

2, pliability is good, can be applicable in any electric wire that moves towards complexity, the cable protection.Through bend test,, still there is not any damage with repeatedly left crooked 90 ° of this sleeve pipe.

3, stretching, good compression property.Through high-intensity tension test and squeeze test, prove that this pipe has the intensity of very high stretch-proof and compression.Has the better protect effect for electric wire, cable.

4, water-fast, earthquake-proof function good.Because this protecting tube is to be formed by the coiling of helical form band steel, has elasticity, vibration resistance.Again owing to watertight composition wet-strong paper and PVC(are arranged in water proof type pulika sleeve pipe in the protecting tube), have complete waterproof action.And, owing to adopt galvanizing by dipping, have good corrosion resisting property, make electric wire, the cable can be owing to being corroded year in and year out.

5, the length of every volume is long, in light weight, and length is several times as much as the length of steel pipe, can grow distance like this and not add the joint pipe arrangement, and the loss of no short code remainder improves economic effect.And can be rolled into plate-like, and volume is little, convenient in carrying, and work high above the ground is easy to carry, reduces the danger of operation greatly.

6, easy to process, construction easily.Can simply pipe be cut off with Puli's swaging clamp at an easy rate according to the length needs of construction, do not need with instruments such as iron saw, vices.Field operation needs few with instrument, and only with hand just can need bending to the free root of protection tube, needn't significantly reduce the complexity of labour intensity and construction with using the pipe arrangement instrument always.Because whole pipe shaft is all formed by screw thread is pleated, connect no matter disconnect wherein all needn't choosing to detain, can directly be connected with special joint.Easily vulnerable shortcoming when making electric wire, cable avoid steel pipe to connect.The joint of Plica tube can be made several multi-form, is applicable to various directions, in various flexibility and the various bore.

Below, the utility model is described in further detail for the embodiment in conjunction with the accompanying drawings.

Fig. 1 is the axial cutaway view of first embodiment of the flexible protection tube of electric wire, cable.

Fig. 2 is the partial enlarged drawing of Fig. 1.

Fig. 3 is the axial cutaway view of second embodiment of the flexible protection tube of electric wire, cable.

Fig. 4 is the partial enlarged drawing of Fig. 3.

Mark among the figure: 1. being water-fast ply of papers, 2. is band steel layers, 3. is galvanizing by dipping band steel layers, 4. is watertight compositions.

In Fig. 1, Fig. 2, protection tube is made up of trilaminate material.Water-fast ply of paper 1 is positioned at the innermost layer of protective jacket tube wall, and band steel layer 2 is in the intermediate layer of protection tube wall, and outermost layer is a hot dipping degree zinc band steel layer 3.Trilaminate material is that helical form closely is wound on together.

In Fig. 3 and another embodiment shown in Figure 4, protective jacket is formed by four layers.Its structure is to have increased one deck watertight composition outside last a kind of protection tube.That is, innermost layer is water-fast ply of paper 1, secondly is band steel layer 2, is galvanizing by dipping band steel layer 3 secondly again, and outermost layer coats the soft watertight composition 4 of one deck.This layer watertight composition generally uses polyvinyl chloride (PVC) to make.Good waterproof action and flexibility are arranged.

In above two embodiment, be with steel layer 2 except that making, also available aluminium strip, copper strips, stainless steel band etc. with common steel band.Galvanizing by dipping band steel layer 3 also can adopt hot dipping lead plating band steel, hot dipped tinning band steel, aluminium strip, copper strips, stainless steel band etc. except that doing the base band with common steel band.

Because the effect of the existing common protecting tube of the utility model has the incomparable advantage of common protecting tube again, it can the same all occasions that is applied in steel electric wire protecting tube, especially can use in special, moist, complex environment.Plica tube puts goods on the market and gets final product import substitutes, for country saves a large amount of foreign exchanges, construction equipment as a kind of convenience, practicality, economy can be widely used in national economy all departments such as building, railway, traffic, electromechanics, petrochemical industry, mining and metallurgy, post and telecommunications, communication, aircraft, boats and ships, rolling stock.Owing to replace coating steel pipe, can reach material-saving, energy-conservation, the purpose that reduces construction cost, efficent use of resources, will produce huge economic benefit and social benefit.

Claims

1, a kind of pliability protection tube that is used for electric wire, cable, it is characterized in that it is made up of trilaminate material, the innermost layer of tube wall is water-fast ply of paper 1, in the outside of water-fast ply of paper is strap layer 2 and strap layer 3 successively, and the trilaminate material helical form closely is wound on together.

2, protection tube according to claim 1 is characterized in that, also coats the soft watertight composition 4 of one deck in the outside of strap layer 3.

According to claim 1,2 described protection tubes, it is characterized in that 3, strap layer 2 is band steel, also can be aluminium strip, copper strips, stainless steel belt.

According to claim 1,2 described protection tubes, it is characterized in that 4, strap layer 3 is galvanizing by dipping band steel, also can be hot dipped tinning band steel, hot dipping lead plating band steel, aluminium strip, copper strips, stainless steel belt.

5, protection tube according to claim 2 is characterized in that, the outermost soft watertight composition 4 of sleeve pipe is a polyvinyl chloride.