CN201060248Y

CN201060248Y - Electrical cable recognizer

Info

Publication number: CN201060248Y
Application number: CNU200720124871XU
Authority: CN
Inventors: 李历波; 漆开; 李杨; 冷柃檬; 苏亚西; 张电; 刘渝; 杨国际; 田茂; 唐芳; 邓雪飞; 廖玉祥; 赵飞
Original assignee: Jiangbei Power Supply Bureau Of Chongqing Electric Power Corp
Current assignee: Jiangbei Power Supply Bureau Of Chongqing Electric Power Corp
Priority date: 2007-07-31
Filing date: 2007-07-31
Publication date: 2008-05-14
Anticipated expiration: 2017-07-31

Abstract

A cable identifier comprises a hollow frame and an enamelled coil wound on the hollow frame. The surrounding of the hollow frame and the enamelled coil are coated with an insulation material layer; the periphery of the enamelled coil has two iron laminations connecting with the coil; the hollow frame is provided with selenium steel pieces. Due to the adoption of the technical proposal, the utility model has the following advantages that the product has small size, convenient use and excellent safety, so the possibility is avoided that an operator in a cable duct can touch other running cables for a long time, and a low safety voltage is enough as the test voltage; the product has good handling property and matches with other commonly used test apparatuses and instruments for use, thereby lowering the cost of test equipment; the product has high reliability that the pointer deflection of a multimeter is always remarkably over one third of the full scale under any condition and by repeated voltage increase and decrease on a voltage regulator, wrong judgment can be avoided through time consistency.

Description

Cable identifier

Technical field

The utility model belongs to electric power and the Communication Engineering technical field that power cable is laid, and specifically, relates to a kind of at being positioned under the same soil at many cables or accurately judging the recognizer of failure cable under the situation of same cable duct.

Background technology

In cable construction, maintenance process, need a certain particular cable is identified from a branch of cable, for example after breaking down or test, cable is judged as when defective, need in many cables, judge failure cable, for the further localization of faults and fault handling provide strong scientific basis, prevent that the staff from touching the operation cable and causing personal injury or device damage.And the identification cable must be correct, otherwise will directly influence the person and device security, this work has the requirement accuracy of judgement, can not damage that other cable, danger are very big, influence area big, difficulties such as cable mutual extrusion weight is big, the space is little, environment difference.Many reasons such as traditional direct discriminating power of cable recognition methods is not high, the circuit data is inaccurate, domestic the mistake sawing cable once repeatedly took place and security incident takes place, cause threat for the person and device security, brought panic psychology when returning workmen's cutover work simultaneously.

At present, the most frequently used recognizer of being made up of high-precision heavy caliber clamp on amperemeter, reometer, voltage table, switch of identification cable is discerned, in use, the alternating magnetic field that has the induction of 50Hz AC field to produce around the cable that under the power frequency state, moves, utilization is wound on the inductive coil on the silicon steel sheet, directly place on the cable, just can hear the industrial frequency AC electric signal that comes out by coil-induced in the earphone, electric current transmitted is big more in the cable, and the industrial frequency AC electric signal of hearing is also just big more; In general, the low-voltage cable electric current transmitted is bigger, and the high-tension cable electric current transmitted is less, so this recognizer is more effective to the differentiation of low-voltage cable, simple to operate, it is less to be suitable for cable line, the better simply occasion of excavation site situation, but when many circuit parallel lay-ups are crowded, when load being arranged because of adjacent cable, the power frequency component that can occur therebetween interacts, be easy to cause erroneous judgement, the steel armour has decay to the induced field of alternating current, add the power of single-phase load can not be too little, cable with threephase load also usually the out-of-balance current of influential detection exist; Simultaneously, treat that because of power failure the cable line of reconfiguration does not have electric current, just can't hear the sound of ac signal.

The utility model content

The purpose of this utility model provides a kind of simple in structure, and volume is small and exquisite, and is easy to operate, the cable identifier that range of application is wider.

For this reason, the cable identifier that the utility model provides, contain hollow skeleton and the enameled wire loop that is wrapped on the hollow skeleton, hollow of bone and enameled wire loop periphery are packaged with the insulating material encapsulated layer, have two laminations that are connected with coil in the enameled wire loop periphery, hollow skeleton is provided with the selenium steel disc.

In the utility model, apply safe voltage by pressure regulator on the core with cable one end, and in the pressure regulator loop string one reometer, and one voltage table monitor, the direct ground connection of cable other end core, on the measurement point of cable the selenium steel disc on the hollow skeleton is being enclosed within on the cable, on lamination, is connecing a multimeter and observe; If earth terminal with exert pressure the end on same cable, then the multimeter pointer will deflect, and indication is with adding electric current size and regular variation, if earth terminal is not on the cable of end of exerting pressure, no matter then this cable is normal operation or all not deflecting at measurement point multimeter pointer of stopping transport, the pointer by multimeter passes rule partially and judges needed a certain particular cable.

The utility model does not need to measure concrete current value, avoided power frequency component between the cable to interact and the erroneous judgement that causes of electromagnetic interference (EMI) on every side, in addition, the utility model can relatively judge under the mal-condition, and be not subjected to temperature, humidity and external electric field influence.

Owing to adopted technique scheme, the utlity model has following advantage:

1, product is small and exquisite, and is easy to use, and security is good, avoided the possibility of staff's other operation cables of Long contact time in cable duct, and trial voltage only need be used lower safe voltage;

2, workable, be used with other test apparatuses commonly used, instrument, the testing equipment cost is low;

3, reliability height, because in all cases, multimeter pointer all deflection and by pressure regulator is carried out buck repeatedly, just can be avoided judging by accident obviously in full scale more than 1/3 from the consistance of time.

Description of drawings

Description of drawings of the present utility model is as follows:

Fig. 1 is the structural representation of first kind of enforcement of the utility model;

Fig. 2 is the structural representation of second kind of enforcement of the utility model;

Fig. 3 is the user mode reference diagram of Fig. 1.

Among the figure: 1. hollow skeleton; 2. enameled wire loop; 3. lamination; 4. lamination; 5. selenium steel disc; 6. hollow bore; 7. contact rod; 8. spring; 9. cable; 10. pressure regulator; 11. reometer; 12. voltage table; 13. multimeter.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figure 1 and Figure 2, cable identifier of the present utility model has hollow skeleton 1 and the enameled wire loop 2 that is wrapped on the hollow skeleton 1, hollow 1 in bone and enameled wire loop 2 peripheries are packaged with the insulating material encapsulated layer, wherein, enameled wire loop 2 peripheries have two laminations that are connected with

coil

3,4, and hollow skeleton 1 is provided with selenium steel disc 5.

As shown in Figure 1, an end of selenium steel disc 5 is positioned at the hollow bore 6 of hollow skeleton 1, and the other end is exposed to outside the hollow skeleton 1.Be enclosed within on the cable for the ease of the selenium steel disc, the selenium steel disc can be selected the length that adapts according to the size of cable.

As shown in Figure 2, to carry with easy to use in order making, in the hollow bore 6 of hollow skeleton 1, to be provided with contact rod 7, be respectively arranged with selenium steel disc 5 at the two ends of contact rod 7, overlap mutually between the described selenium steel disc 5, between contact rod 7 and selenium steel disc 5, be provided with flexible restoring organ.In use, two selenium steel discs are drawn back, be placed on the cable, after loosing one's grip, the selenium steel disc resets under the effect of flexible restoring organ, with clamping position cable.

As shown in Figure 2, flexible restoring organ is a spring 8, and an end of this spring is fixed on the contact rod 7, and the other end is fixed on the middle part of selenium steel disc 5.

Principle of work: as shown in Figure 3, during use, earlier on the core of cable 9 one ends, apply safe voltage by pressure regulator 10, and in pressure regulator 10 loops the string one reometer 11, and one voltage table 12 monitor, cable 9 other end core ground connection are being enclosed within the selenium steel disc 5 on the hollow skeleton 1 on the cable 9 on the measurement point of cable 9, connect a multimeter 13 and observe on lamination; If earth terminal with exert pressure the end on same cable, then the multimeter pointer will deflect, and indication is with adding electric current size and regular variation, if earth terminal is not on the cable of end of exerting pressure, no matter then this cable is all not deflecting at measurement point multimeter pointer of normal operation or stoppage in transit, pointer by multimeter passes rule partially and judges needed a certain particular cable, in order to make the cable accuracy of judgement, can detect several times by the utility model.

Claims

1. cable identifier, comprise hollow skeleton (1) and be wrapped in enameled wire loop (2) on the hollow skeleton (1), bone hollow (1) and enameled wire loop (2) periphery are packaged with insulation material layer, it is characterized in that: enameled wire loop (2) periphery has two laminations that are connected with coil (3,4), and hollow skeleton (1) is provided with selenium steel disc (5).

2. cable identifier as claimed in claim 1 is characterized in that: an end of described selenium steel disc (5) is positioned at the hollow bore (6) of hollow skeleton (1), and the other end is exposed to outside the hollow skeleton (1).

3. cable identifier as claimed in claim 1, it is characterized in that: in the hollow bore (6) of hollow skeleton (1), be provided with contact rod (7), be respectively arranged with selenium steel disc (5) at the two ends of contact rod (7), overlap mutually between the described selenium steel disc (5), between contact rod (7) and selenium steel disc (5), be provided with flexible restoring organ.

4. cable identifier as claimed in claim 3 is characterized in that: flexible restoring organ is spring (8), and an end of this spring (8) is fixed on the contact rod (7), and the other end is fixed on the middle part of selenium steel disc (5).