CN2350912Y

CN2350912Y - Digital display cable core check device

Info

Publication number: CN2350912Y
Application number: CN 98215798
Authority: CN
Inventors: 黄善良
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-25
Filing date: 1998-06-25
Publication date: 1999-11-24
Anticipated expiration: 2008-06-25

Abstract

The utility model relates to a digital display cable core check device, which is composed of a vibrating voltage-lifting current-limiting circuit, a cable core checking and setting network circuit, a lighting circuit, a direct current power supply and a digital multimeter. The direct current generates the alternating current voltage with high voltage and low current through the vibrating voltage-lifting current-limiting circuit and is output from a first socket of a cable core socket on a panel through a ground terminal for searching a common line. The cable core checking and setting network circuit is composed of resistors with different integral K values and respectively supplies the resistance value consistent with the socket serial number to each cable core socket for checking the cable cores. One end of the cable core is sheathed with the serial number at will and is inserted into each socket sequentially. The digital multimeter checks the cable core on the other end of the cable and directly displays the serial number of the tested cable core.

Description

Numeral shows line connector

The utility model relates to cable core in the electricity field to line, the link cable core that particularly is specifically related to secondary connection in the electric power system to line and automation control cable core to line.

Up to the present, the power transformation installation and maintenance of power department, water power construction team, railway construction distribution place, telecommunication distribution engineering place and industrial automation installing engineering etc. in cable laying existing news Chinese percussion instrument to line, universal instrument to line, these are device and means that cable laying adopts, but because of each device technique content low, cause reliability low, operation inconvenience, inefficiency, big to the line difficulty, this be because:

1, news Chinese percussion instrument and universal instrument all adopts two people cable one end work everywhere, and the news Chinese percussion instrument sends sound equipment and light representation path, the universal instrument gauge outfit deflect (pronunciation of digital multimeter buzzer) represent path.Have only all cables core are put examination one by one, till path, could be to last single line core, two people respectively put sequence number or " nuclear head " sign then, more repeatedly to last second core, the 3rd core, till to intact core.Because news Chinese percussion instrument or universal instrument are grasped by a people, tell the other side again after examination is logical, it is right again to try also will to notify the other side to change core when obstructed, and inefficiency not only, and when getting in touch with the other side easily produces the wrong sense of hearing and marks wrong sequence number or " nuclear ".

When 2, adopting news Chinese percussion instrument or universal instrument to line, some cable core does not have independent look heart yearn, needs interim additional return line, news Chinese percussion instrument or universal instrument could be worked, and cable is crossed over two or three floor sometimes, and return line inconvenience is placed, inconvenience and the other side's contact during to line, big to the line difficulty, reliability is low.

3, power consumption is big, and news Chinese percussion instrument employing electromagnet pronunciation and miniature bulb commonly used are luminous, cause power consumption excessive.

The purpose of this utility model aims to provide a kind of easy and reliably to the line means, be applicable to all cable cores to line, processing ease, numeral intuitively shows, is not subjected to the condition influence of workplace, power consumption is little, the one man operation, high efficiency, fast to linear velocity.

Technical solution of the present utility model is:

This line connector is by the oscillation boosting current-limiting circuit, form line setting network circuit, DC power supply, digital multimeter, lighting device.

Vibrate, boost, current-limiting circuit adopts triode--transformer positive feedback oscillating circuit, boost type transformer, the output of resistance current limliting.Adopt high voltage, the output of little electric current, the transmission of cooperation the earth is waiting to try to use on the cable core universal instrument (a test pencil ground connection, another test pencil be the test cable heart yearn respectively) or voltage test pencil to seek the common wire of Line 1 work to the line setting network.

Adopt the fixed resistance of different whole K values to form to the line setting network, provide (resistance) whole K numerical value to conform to each socket, as sequence number corresponding to the insertion cable core with the socket sequence number.At the other end of cable digital multimeter 200K shelves, a test pencil connects No. 1 common wire, and another test pencil is tested each heart yearn, and shown numeral is this heart yearn sequence number.

DC power supply to vibrate, boost, the power supply of current-limiting circuit and lighting device.During to line, only power consumption when seeking common wire.

Digital multimeter belongs to independently product, seeks common wire with exchanging 200 volts of shelves, uses the 200K shelves to line.

Lighting device adopts flashlight head to add control switch and forms, and is an auxiliary equipment, and is main with the temporary lighting of doing the lineman is done.

The utility model only needs the resistance to the line setting network is increased to 200 the tunnel, can expand to 200 lines to the line number.

Owing to adopt technique scheme, can be easy, quickly and reliably to line, when seeking common wire, utilize the earth that the loop is provided, do not need to establish in addition return line.Be applicable to all cables, be not subjected to the influence of workplace, be not subjected to the floor of cable leap, the influence of room number, little power consumption, the one man operation can arbitrarily overlap the nuclear head at an end of cable according to the sign of tie lines figure terminal board, to line, put corresponding nuclear head at the other end again, alleviate workload.During to line, on the digital multimeter display screen, directly read the cable core sequence number, simple to operate, reliable operation, function admirable.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model structured flowchart

Fig. 2 shows the electrical schematic diagram (digital multimeter is a complete and product independently, and line map is exempted from) of line connector for numeral

Fig. 3 is that numeral shows line connector cable core socket and sequence number part

Fig. 4 is the internal structural map that numeral shows line connector

Fig. 5 is that numeral shows line connector the lineman is mapped

1. cable core sockets and sequence number part 2. wiring boards among Fig. 4

3. K switch ₁, K ₂4. lighting device

11. line connectors, 12. tested cables among Fig. 5

13. digital multimeter

The utility model is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1 and Fig. 3, Fig. 4.The utility model is illustrated in figure 4 as an overall structure, (digital multimeter is product independently, exempts to state), cable core socket and sequence number are wiring board at outer casing frontispiece in the shell, and the circuit on the wiring board as shown in Figure 1, by vibrate, boost, current-limiting circuit, line setting network circuit is formed.The right top of shell is gone up and is K switch ₁, K ₂, the shell right side is a lighting device.The concrete enforcement of each circuit is as shown in Figure 2:

Triode VT, transformer TU, capacitor C1, capacitor C2, light-emitting diode VD, resistance R 1, resistance R 31, resistance R 32 constitute triode--transformer positive feedback oscillation boosting current-limiting circuit, work as K switch ₁Pull out when " boosting ", direct current E powers to oscillating circuit, triode VT obtains bias current by resistance R 31 and enters operating state, because the positive feedback of coil L2 makes circuit keep vibration, L3 is boosted at coil, after resistance R 1 current limliting, export by " ※ " jack, the other end ground connection of coil L3 so that during to line, is sought common wire by universal instrument (or voltage test pencil).The effect of resistance R 1 is to reach 5 MAHs when " ※ " holds the electric current of output, and " ※ " end voltage to earth drops to below 24 volts, guarantees line safety.Triode VT is when oscillatory work, and collector current produces voltage drop on resistance R 32, lights light-emitting diode VD, and VD makes the relay indicating light of oscillating circuit.Work as K switch ₁Pull out when " to line ", the power supply of oscillating circuit is cut off, and " ※ " holds no-voltage, and " ※ " end passes through K simultaneously ₁--1 ground connection becomes the common wire to the line setting network.In addition, K switch ₁Pull out when " to line " position, illuminating line passes through K ₁--2 connect, and the work of lighting device is by K switch ₂Control.

Line setting network circuit is made up of resistance R 2--resistance R 30, the whole K numerical value of each resistance is identical with corresponding socket sequence number, for example: the resistance of (No. 1 socket except) No. 2 sockets is 2k, and the resistance of No. 10 sockets is 10k, and the resistance of No. 21 sockets is 21k ... the resistance of n socket is nk.Because each resistance value is far longer than the D.C. resistance of cable core, so during to line, the volume resistance of cable core does not influence the demonstration sequence number.During to line, digital multimeter is in the 200k shelves, and the numerical value that records is exactly the sequence number of this cable core, comes into plain view.

Of the present utility model to line method as shown in Figure 5:

1. on each heart yearn of one of cable, put sequence number or nuclear head arbitrarily, insert by sequence number on the respective socket of line connector, functional switch K ₁Pull out to " boosting " position, use digital multimeter (200v shelves) test pencil ground connection at the other end of cable, another test pencil is by the core test, when recording certain core voltage (about 100 volts) arranged, this core is exactly a Line 1, puts on No. 1 and indicates or corresponding " nuclear head ", and Line 1 is made common wire.

2. the functional switch K of line connector ₁Pull out to " to line " position, connect common wire with test pencil of digital multimeter (200k shelves), another root test pencil is tested all the other cores respectively, and every survey single line core shows a numeral, be exactly the sequence number of this core, put on this digital number sign or corresponding " nuclear head " sign.

Referring to Fig. 5, the network of the high voltage of searching common wire of the present utility model, little electric current and decision core sequence number is tested cable from

line connector

11,12, and 13 is the digital multimeter that line is shown usefulness.Can help to understand operation principle of the present utility model with reference to Ben Tu.

Claims

A kind of numeral shows line connector, by the oscillation boosting current-limiting circuit, to line setting network circuit, lighting circuit, DC power supply, digital multimeter is formed, it is characterized in that: vibration, boost, current-limiting circuit is by triode, transformer, electric capacity, resistance is formed, high-tension coil two ends at transformer produce high voltage, the alternating voltage of little electric current, export by the metal earth terminal of outer casing bottom and No. 1 socket of the cable core socket on the panel, seek common wire usefulness for universal instrument or voltage test pencil, line setting network circuit is made up of the resistance of each whole K numerical value, and connect each corresponding cable core socket respectively, socket is conformed to the socket sequence number with the whole K numerical value of the resistance between No. 1 public socket, common port to each resistance of line setting network connects No. 1 socket of common wire by functional switch, for line is used.