CN101572357A

CN101572357A - Induction prevising grounding wire

Info

Publication number: CN101572357A
Application number: CNA2009100105873A
Authority: CN
Inventors: 姜广敏; 陈洪波; 郑景宏
Original assignee: LIAONING ELECTRIC POWER Corp PANJIN POWER SUPPLY CORPORATION
Current assignee: LIAONING ELECTRIC POWER Corp PANJIN POWER SUPPLY CORPORATION
Priority date: 2009-03-06
Filing date: 2009-03-06
Publication date: 2009-11-04

Abstract

The invention solves the problems that a grounding wire cannot alarm for an induction voltage, and safety potential exists. The grounding wire comprises a cable, a grounding clamp which is connected with one end of the cable, and a grounding pile head which is connected with the other end of the cable. The grounding wire is characterized in that the grounding clamp is provided with an induction voltage alarm device; the cable passes through an insulated extension sleeve operating rod, and then the tip end of the cable is connected with the grounding clamp; the tail end of the insulated extension sleeve operating rod is provided with a roller through a connecting plate; the tail end of the cable is wound onto the shaft of the roller; and one end of another section of cable is connected with the connecting plate, while the other end is connected with the grounding pile head. The grounding wire can avoid the phenomenon that a conducting wire or the grounding wire has the induction voltage to harm operators because of poor contact of the grounding wire. The operating rod has a multi-node extension sleeve structure, and the tail end of the operating rod is provided with the roller, so the operating rod is convenient to store and carry.

Description

Induction prevising grounding wire

Technical field

The invention belongs to defeated pretty electro-technical field, the earth connection that uses when particularly having a power failure.

Background technology

The temporary ground wire that electric power system is used is made up of ground clamp, cable and ground wire pile crown, and wherein ground clamp is used to be articulated in lead, and the ground wire pile crown is fixed on the ground wire, and cable connects ground clamp and ground the end of a thread.When carrying out overhaul of the equipments, by the operating personnel with ground wire hitching near the lead the electric equipment.After a certain lead in the power transmission path had a power failure, the lead electric field action can produce induced potential near this lead was subjected to.If it is improper that earth connection hangs, there is the virtual connection phenomenon, cause earth connection ground connection reliably, like this, induced potential will work the mischief to the operating personnel.According to reports, Yichang transmission of electricity company of Hubei ehv power transmission company in 2008 carries out the insulator cleaning to 500 kilovolt shaft towers and disappears when lacking operation operation personnel chest electrification death near the earth terminal of ground wire.The earth connection (cable) that uses at present is suspended in the air in addition, rocks greatly, particularly uses on the tower-mounted circuit of same iron, and safe distance all is difficult to guarantee sometimes.

Content of the present invention

Can not report to the police to induced voltage in order to solve earth connection, have the problem of potential safety hazard, propose following technical scheme.

The present invention is achieved in that

A kind of induction prevising grounding wire, it comprises the ground clamp that cable is connected with the one end, the ground wire pile crown that the other end connects, its special character are that the induced voltage warning device is installed on the ground clamp.

In order to prevent that cable from rocking big problem aloft, after cable passes insulation extension sleeve action bars, at its most advanced and sophisticated ground clamp that connects, at its terminal ground wire pile crown that connects.

For the ease of the folding and unfolding cable, by connecting plate cylinder is installed at the end of insulation extension sleeve action bars, the Mo Duan Chan of cable is on the axle of cylinder, and other has one section cable, and the one end links to each other with connecting plate, and the other end connects the ground wire pile crown.

Above-mentioned induction alarm device can adopt prior art and product, melts warning device in the Safety helmet with an electric alarm means (DBM-III-A type) that safety equipment Co., Ltd produces as adopting Chong Qingkang.Insulation extension sleeve action bars also is a known technology.

This induction prevising grounding wire using method is: at first the lead that needs hanging earthing conductor is carried out electrical verification, after determining no-voltage, the ground wire pile crown is connected reliably with iron tower, then with ground clamp near lead, this moment warning device send " " chimes of doom, when ground clamp with after lead closely contacts, chimes of doom disappears.If there is the virtual connection phenomenon in the earth connection loose contact, warning device can send chimes of doom so, reminds the operating personnel to check the connection status of earth connection, make it contact good, till chimes of doom disappears.Avoided the earth connection loose contact like this, lead or earth connection exist induced voltage to the harm that the operating personnel causes, and have improved the reliability of earth connection.

Because action bars adopts the multi-joint telescoping telescoping structure, at the end of action bars cylinder is installed, therefore, when this earth connection not a few joint sleeves of time spent can be reduced in the thickest joint, electric cable Chan is convenient to collection like this and is carried on the axle of cylinder.When using, a few joint sleeves can be drawn back, make ground clamp contact wire.

Description of drawings

Fig. 1 is the full sectional view of embodiment, and Fig. 2 is the vertical view of embodiment, and Fig. 3 is the partial enlarged drawing A of embodiment, and Fig. 4 is another state diagram of ground clamp shown in Figure 3, and Fig. 5 is the partial enlarged drawing B of embodiment, and Fig. 6 is the warning device circuit diagram of embodiment.

Embodiment

Embodiment, narrate embodiment with reference to the accompanying drawings.

A kind of induction prevising grounding wire, it comprises cable 5, ground clamp 7 and ground wire pile crown 9.Described cable 5 is made by annealed copper wire.Cable 5 passes insulation telescopic sleeve pipe type sucking action bars 4 backs and connects ground clamp 7, the end of cable 5 fixedly Bing Qie Chan around cylinder 1 the axle 2 on, axle 2 is installed in the end of telescopic sleeve pipe type sucking action bars 4 by connecting plate 3, crank 8 is installed on the axle 2, on connecting plate 3, is connected ground wire pile crown 9 by one section cable (annealed copper wire).Described ground clamp 7 is the rat clip type structure, promptly two clamping plate are connected as one by bearing pin 7.4, mounting spring 7.5 on bearing pin 7.4, on a slice clamping plate, fork 7.2 is installed by bearing pin 7.1, the other end of fork 7.2 is bearing on another sheet ground wire clamping plate, make the open-shaped attitude of ground clamp, on another sheet clamping plate, have through hole 7.3 for fork 7.2 activities.Warning device 6 is installed on ground clamp 7.Described warning device 6 comprises the triggering loop that peripheral cells such as oscillator that peripheral cells such as BG1, BG2 constitute and BG3 constitute.When ground clamp when the charged object, the BG3 conducting, the base stage of BG2 has high potential, circuit vibrates, loud speaker is sounded, is reported to the police.K1 can select different resistance among the figure, formation 220V, 66KV, the electric pressure that 220KV is different.AN is a test button, and circuit is sounded during connection, can checking circuit operate as normal whether.When AN connects, capacitor C3 charging, oscillator work, loudspeaker Y are sounded, and discharge when AN disconnects the back capacitor, be put into certain voltage after, oscillator quits work.

When this induction prevising grounding wire uses, at first the ground wire pile crown is linked to each other with iron tower (ground wire), then a few joint insulation telescopic sleeve pipe type sucking action bars are pulled out successively, reach till the length that needs.Two ground clamps of fork 7.2 supportings this moment, ground clamp 7 open-shaped attitudes, as shown in Figure 3.When the operation personnel with ground clamp 7 during near lead, warning device 6 sends " squeak " and reports to the police.When ground clamp 7 contacted with lead, lead and fork 7.2 collisions broke away from fork 7.2 and a slice ground wire clamping plate wherein, and under the effect of spring 7.5, ground clamp 7 closes, with wire clamp therein, and as shown in Figure 4.When removing earth connection, the crank 8 on 12 of the hand drum, with Dian Lan Chan around, and action bars 4 is shortened.Be convenient to like this collect and carry.

Claims

1, a kind of induction prevising grounding wire, it comprises the ground clamp that cable is connected with the one end, the ground wire pile crown that the other end connects is characterized in that installing on the ground clamp induced voltage warning device.

2, according to the said induction prevising grounding wire of claim 1, it is characterized in that described cable passes insulation extension sleeve action bars after, at its most advanced and sophisticated ground clamp that connects, at its terminal ground wire pile crown that connects.

3, according to the said induction prevising grounding wire of claim 2, its feature is installed cylinder at the end of described insulation extension sleeve action bars by connecting plate, and the Mo Duan Chan of cable is on the axle of cylinder, and other has one section cable, the one end links to each other with connecting plate, and the other end connects the ground wire pile crown.