CN101593574A

CN101593574A - A kind of fixed length electric wire that has special-shaped electric wire switching device

Info

Publication number: CN101593574A
Application number: CNA200910032136XA
Authority: CN
Inventors: 王浩; 李爱群; 王晨
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2009-07-01
Filing date: 2009-07-01
Publication date: 2009-12-02
Anticipated expiration: 2029-07-01
Also published as: CN101593574B

Abstract

The fixed length electric wire that has special-shaped electric wire switching device is in order to solve when in the open air all kinds of engineering structures being tested, and because of works on-the-spot test environment and condition of work complexity, existing conventional electric wire usually is difficult to satisfy the different problems that require.This electric wire adopts the design of outsourcing waterproofing membrane at the actual conditions of field test environment and the characteristics of different structure thing, has increased adjustable in length function, superpower resistance to compression and water-proof function.Designed circle and two kinds of cross sections of flat simultaneously and satisfied of the requirement of fc-specific test FC environment electric wire.Obviously, the engineering structure test can be satisfied the requirement of complicated field test environment to electric wire better with adjustable electric wire, has improved the fail safe and the convenience of on-the-spot test work, for finishing smoothly of on-the-spot test work provides guarantee.

Description

A kind of fixed length electric wire that has special-shaped electric wire switching device

Technical field

The present invention relates to a kind of special-shaped electric wire switching device, when being particularly useful for all kinds of engineering structures being tested, play power supply and the tester effect of connecting in the open air.

Background technology

For the fail safe of the construction quality of accurate evaluation engineering structure, the stress of holding structure, evaluation structure and predict its residual life or the like, all be necessary to hurry to test job that engineering structure carries out at the scene, to provide reliable measured data as main foundation.Yet different with the test of carrying out in the laboratory, the external environment condition of on-the-spot test work and condition are very complicated, so difficulty is bigger.Works is being carried out in the process of test job, after installing various testers, usually all must corresponding power supply, data acquisition, analysis and storage device etc. be coupled together with electric wire, how the angle from electric wire guarantees the efficient and convenient and test job of safety and stability again under abominable field test environment, and this has gone out a great problem for the engineering test personnel.

At first, during test the needs of wire length are subjected to the influence of factors such as engineering structure classification, content measurement, test purpose, therefore different actual measurements needs the electric wire in different length and cross section.At present common situation is to go test site with very long electric wire, in order to avoid test and can't carry out due to not enough because of wire length.Adopt long electric wire to test not only and carry, install and test the trouble of arrangement afterwards that finishes, and be not easy to the investigation maintenance.Long in addition electric wire has also increased the unexpected probability of appearance in the test process.

Secondly, the field test environment is very abominable usually, connects the test that electric wire need be exposed to the elements, in case electric wire is destroyed, will occur the seeping water danger of electric leakage so not only can be made troubles to test job, and may be caused a lot of unexpected losses.Therefore, the water resistance of electric wire is very important.Simultaneously, the partial cross section of electric wire may be pushed by some barriers during test, be in complicated stress state, the traditional electrical line strength that this moment, conventional material was made often can not meet the demands, may be damaged by pressure, anti-pressure ability is strong, the material of good toughness is made specially so the partial cross section of electric wire can be adopted, and satisfies bearing requirements.

In when test, often electric wire need be passed some less holes, long and narrow narrow slit or the like, this moment, traditional circular cross-section often can not meet the demands, and therefore, can well address this problem by conversion electric wire cross section.

Summary of the invention

Technical problem: the purpose of this invention is to provide a kind of fixed length electric wire that has special-shaped electric wire switching device, connect power supply and tester when this electric wire can be applicable to that all kinds of engineering structures external environment condition of living in carried out field test.It not only avoid common wiring tediously long, easily dirty easy to wear, be difficult to shortcomings such as investigation maintenance, wiring trouble, the problem that the infiltration that adverse circumstances cause in the time of can also preventing field test is leaked electricity.

Technical scheme: the technical solution adopted for the present invention to solve the technical problems is: this electric wire comprises inner core, insulating barrier, switching device, waterproofing membrane; Wherein, waterproofing membrane wrap insulate layer, insulating barrier parcel inner core, two ends at the fixed length electric wire are provided with switching device, the fixed length electric wire comprises rectangle and circular two kinds of section forms, switching device is to play the effect that connects the special-shaped electric wire of each section, and according to the difformity in electric wire cross section, switching device comprises three types circle-circular interfaces, circle-rectangle interface, rectangle-rectangle interfaces.

Waterproofing membrane is the disposable waterproof film, before use is carried out, waterproofing membrane is twined the parcel electric wire, after use work is finished, in time changes film.

The fixed length electric wire reaches the effect of regulating length by the segmentation setting, and fixed length electric wire full-length comprises 1m, 2m, 5m, 10m, 20m and 50m.

Because different engineering test condition difference, often electric wire need be passed some less holes, long and narrow narrow slit or the like during test, therefore electric wire adopts the setting of variable cross-section area, and at the situation than small holes, the partial cross section of adjustable electric wire is set to the circular cross-section that sectional area diminishes; At the situation of long and narrow narrow slit, the partial cross section of adjustable electric wire is set to flat.

Wire length has the scalable function, it is convenient that the design of segmentation makes that this New-style electrical wire carries, thereby avoid conventional traditional electric wire transportation to carry inconvenient shortcoming, moreover, after the test of installation one-level finishes, traditional conventional electrical wire sorting gets up and bothers easily, even is damaged easily, and New-style electrical wire can overcome this defective.In addition, in the open air in the engineering test, because the abominable of environment, in case traditional conventional electric wire is damaged, the investigation service work is very difficult, can cause the stagnation of open-air engineering test work like this, and the design of New-style electrical wire can make the investigation service work carry out smoothly, thereby guarantee carrying out smoothly of engineering test work.

Beneficial effect: by design, but have the length adjustment function, make this electric wire can satisfy the requirement of different distance length when testing in the open air, and help the investigation maintenance to this wire length segmentation.Play good waterproof effect by being provided with of outsourcing waterproofing membrane, and the characteristics of utilizing waterproofing membrane to change easily, greatly satisfy the requirement of field test.Adopt the special material TPU that the waterproof compressive property is arranged by this electric wire insulation layer, make this electric wire can well satisfy anti-pressure anti-torsion under adverse circumstances, and prevent the infiltration electric leakage.By setting, make this electric wire satisfy the demand of the site condition of different engineering tests to this electric wire variable cross-section.Along with in the world wide to the continuous attention of engineering test, this new type of adjustable electric wire provide many facilities must for vast engineering test researcher, therefore has future in engineering applications widely.

Description of drawings

Fig. 1 is electric wire of the present invention and interface total length schematic diagram;

Fig. 2 a is a circular cross-section electric wire sectional view of the present invention, and Fig. 2 b is a flat cross section electric wire sectional view;

Fig. 3 a is circle of the present invention-circular cross-section interface elevation, and Fig. 3 b is the A-A cross-sectional view;

Fig. 4 a is circle of the present invention-square-section interface elevation, and Fig. 4 b is the B-B cross-sectional view;

Fig. 5 a is rectangle of the present invention-square-section interface elevation, and Fig. 5 b is the C-C cross-sectional view;

Have among the figure: inner core 1; Insulating barrier 2; Interface 3; Waterproofing membrane 4.

Embodiment

New type of adjustable electric wire of the present invention comprises inner core, insulating barrier, waterproofing membrane, connecting interface.Wherein, waterproofing membrane wrap insulate layer, insulating barrier parcel inner core, connecting interface is to play the effect that connects each section electric wire.The inner core cross section is divided into two kinds, and a kind of is circular cross-section, and a kind of is the flat cross section.This electric wire is taked the design of segmentation, so can reach the effect of regulating length.Wherein full-length comprises 1m, 2m, 5m, 10m, 20m and 50m, and concrete length can be chosen according to actual place demand.

Electric wire adopts the design of outsourcing waterproofing membrane, can well play the useful life that good waterproof effect is come extending wire on the one hand, utilizes the easy replaceability of film on the other hand, satisfies the requirement of field test greatly.

The material of the insulating barrier of electric wire is high strong hardness waterproof material, plays to prevent from easily to damage by pressure in adverse circumstances on the one hand and turns round bad effect, and phenomenons such as infiltration electric leakage take place when preventing field test on the other hand.Therefore, the selection of the insulating layer material of electric wire is very important, traditional conventional wire insulation layer material is polyvinyl chloride (PVC), polyethylene (PE), crosslinked polyethylene (XLPE), (kind is more in the rubber for rubber, butyronitrile rubber is arranged, neoprene; butadiene-styrene rubber; ethylene-propylene rubber etc.); fluoroplastics; nylon; insulating paper or the like; the material of this electric wire can be selected the TPU material for use; TPU is the abbreviation of Thermoplastic Urethane; Chinese is a TPUE, TPU is by '-diphenylmethane diisocyanate (MDI); toluene di-isocyanate(TDI) (TDI) and macromolecular polyol; the macromolecular material that the common reactive polymeric of chain extender forms.At present, TPU is aspect such as extensive use and health care, electronic apparatus, industry and physical culture, its have other plastic material characteristics such as incomparable intensity height, good toughness, wear-resisting, cold-resistant, oil resistant, water-fast, ageing-resistant, weather, he has the function of many excellences such as high water proofing property poisture-penetrability, windproof, winter protection, antibiotic, mildew-resistant, warming, uvioresistant and energy release simultaneously.So adopt the TPU material to can be good at satisfying the requirement of electric wire insulation layer high strength anti-pressure anti-torsion and waterproof.

The interface of electric wire adopts metallic cable waterproof interface, and material is brass nickel plating, and according to the different cross section of different electric wires, the electric wire interface can be divided into that both sides are circle, both sides are square and circular three kinds of forms in square one side on one side.

This electric wire comprises inner core 1, insulating barrier 2, switching device 3, waterproofing membrane 4; Wherein, waterproofing membrane 4 wrap insulate layers 2, insulating barrier 2 parcel inner cores 1, be provided with switching device 3 at the two ends of fixed length electric wire, the fixed length electric wire comprises rectangle and circular two kinds of section forms, switching device 3 is to play the effect that connects the special-shaped electric wire of each section, and according to the difformity in electric wire cross section, switching device 3 comprises three types circle-circular interfaces, circle-rectangle interface, rectangle-rectangle interfaces.

In the test site early-stage preparations, at first debugged instrument, connect electric wire then, it is very important for whole test job to connect electric wire.But generally test environment is very abominable, often electric wire need be passed some less holes, long and narrow narrow slit or the like during test, traditional electric wire can not satisfy its requirement, so select the electric wire of different cross section type according to different test environment sections, when needs pass through than small holes, can select the electric wire of circular cross-section, because the circular cross-section inner core adopts high performance material, so can be so that the sectional area of copper wire wherein and exterior insulation material all reduces.When needs pass through long and narrow narrow slit, can select the electric wire (as shown in Figure 2) in flat cross section.

When being in some very abominable test environment, as test typhoon wind speed, high especially for the waterproof requirement of test wires, the water resistance of this electric wire can well satisfy this point.

Unavoidable meeting runs into a lot of fortuitous events during test, partial cross section as electric wire may be pushed by some barriers, be in complicated stress state, the traditional electrical line strength that this moment, conventional material was made often can not meet the demands, so can adopt the strong electric wire of the high anti-pressure ability of cross-sectional strength when these particular surroundingss.

In the early-stage preparations of the engineering test work in the open air process, at first this electric wire is connected with each other by interface (shown in Fig. 3～5), and then corresponding power supply, data acquisition unit, storage device etc. are connected with New-style electrical wire, field measurement work just can be carried out in the debugging back that finishes.

Claims

1. a fixed length electric wire that has special-shaped electric wire switching device is characterized in that this electric wire comprises inner core (1), insulating barrier (2), switching device (3), waterproofing membrane (4); Wherein, waterproofing membrane (4) wrap insulate layer (2), insulating barrier (2) parcel inner core (1), be provided with switching device (3) at the two ends of fixed length electric wire, the fixed length electric wire comprises rectangle and circular two kinds of section forms, switching device (3) is to play the effect that connects the special-shaped electric wire of each section, and according to the difformity in electric wire cross section, switching device (3) comprises three types circle-circular interfaces, circle-rectangle interface, rectangle-rectangle interfaces.

2. the fixed length electric wire that has special-shaped electric wire switching device according to claim 1 is characterized in that waterproofing membrane (4) is the disposable waterproof film, before use is carried out, waterproofing membrane is twined the parcel electric wire, after use work is finished, in time changes film.

3. the fixed length electric wire that has special-shaped electric wire switching device according to claim 1 is characterized in that the fixed length electric wire by the segmentation setting, reaches the effect of regulating length, and fixed length electric wire full-length comprises 1m, 2m, 5m, 10m, 20m and 50m.