CN101572357A - Induction prevising grounding wire - Google Patents

Abstract

The invention solves the problem that the grounding wire cannot alarm the induced voltage and has potential safety hazards. It consists of a cable and a ground wire clamp connected at one end, and a ground wire pile head connected with the other end. Its special feature is that an induced voltage alarm device is installed on the ground wire clamp. Connect the ground clamp, install the roller through the connecting plate at the end of the insulating telescopic sleeve operating rod, the end of the cable is wound on the shaft of the roller, and there is another section of cable, one end of which is connected with the connecting plate, and the other end is connected with the ground wire pile head. The use of the grounding wire can avoid the harm caused by the poor contact of the grounding wire and the induction voltage of the wire or the grounding wire to the workers. Since the operating rod adopts a multi-section telescopic sleeve structure, and a roller is installed at the end of the operating rod, it is easy to store and carry.

Description

Predictive induction grounding wire

technical field

The invention belongs to the technical field of power transmission, and in particular relates to a grounding wire used in a power failure.

Background technique

The temporary ground wire used in the power system is composed of ground wire clips, cables and ground wire pile heads. lint. During equipment maintenance, the operator hooks the grounding wire to the wire near the electrical equipment. When a wire in the transmission and transformation circuit is powered off, the wire will generate an induced potential due to the electric field of the nearby wires. If the grounding wire is suspended improperly, there will be a virtual connection phenomenon, so that the grounding wire cannot be reliably grounded. In this way, the induced potential will cause harm to the workers. According to reports, in 2008, when Yichang Power Transmission Company, a Hubei ultra-high voltage power transmission and transformation company, was cleaning and eliminating insulators on 500 kV line towers, an operator died of electrocution when his chest was close to the grounding end of the ground wire. In addition, the grounding wire (cable) currently used is suspended in the air, and the shaking is large, especially when used on the line erected on the same iron tower, sometimes the safe distance is difficult to guarantee.

Contents of the invention

In order to solve the problem that the grounding wire cannot alarm the induced voltage and there are potential safety hazards, the following technical solutions are proposed.

The present invention is achieved like this:

A predictive induction grounding wire, which includes a cable and a ground wire clip connected to one end, and a ground wire pile head connected to the other end. Its special feature is that an induced voltage alarm device is installed on the ground wire clip.

In order to prevent the cable from swaying in the air, after the cable passes through the operating rod of the insulating telescopic sleeve, connect the ground wire clamp at its tip, and connect the ground wire pile head at its end.

In order to facilitate the retraction of the cable, a roller is installed at the end of the operating rod of the insulating telescopic sleeve through a connecting plate. head.

Above-mentioned induction alarm device can adopt existing technology and product, as adopting the alarm device in the electric alarm safety helmet (DBM-III-A type) that Chongqing Kangrong Safety Equipment Co., Ltd. produces. Insulation telescoping sleeve operating rod is also known technology.

The method of using the predictive induction grounding wire is as follows: firstly conduct an electric test on the wire that needs to be hung with the grounding wire, and after confirming that there is no voltage, connect the pile head of the grounding wire to the iron tower reliably, and then close the grounding wire clamp to the wire, at this time the alarm device will sound "Squeak" alarm sound, the alarm sound disappears when the local wire clip is in close contact with the wire. If the grounding wire is in poor contact and there is a virtual connection, the alarm device will sound an alarm to remind the operator to check the connection status of the grounding wire to make it in good contact until the alarm sound disappears. In this way, the harm caused by the poor contact of the grounding wire and the induced voltage in the wire or the grounding wire to the operating personnel is avoided, and the reliability of the grounding wire is improved.

Since the operating rod adopts a multi-section telescopic sleeve structure, the roller is installed at the end of the operating rod. Therefore, when the grounding wire is not in use, several sleeves can be retracted into the thickest one, and the cable is wound on the shaft of the roller. , so easy to collect and carry. When in use, several sections of the sleeve can be pulled apart so that the ground wire clip contacts the wire.

Description of drawings

Fig. 1 is a full sectional view of the embodiment, Fig. 2 is a top view of the embodiment, Fig. 3 is a partially enlarged view A of the embodiment, Fig. 4 is another state diagram of the ground wire clamp shown in Fig. 3, Fig. 5 is a diagram of the embodiment Partial enlarged view B, Fig. 6 is a circuit diagram of the alarm device of the embodiment.

Detailed ways

Embodiments Embodiments will be described below with reference to the drawings.

A predictive induction grounding wire, which includes a cable 5, a ground wire clip 7 and a ground wire pile head 9. The cable 5 is made of annealed copper wire. The cable 5 passes through the insulated telescopic telescopic operating rod 4 and connects to the ground clamp 7. The end of the cable 5 is fixed and wound on the shaft 2 of the drum 1. The shaft 2 is installed on the telescopic telescopic operating rod 4 through the connecting plate 3. The end, rocking handle 8 is installed on the shaft 2, connects the ground wire pile head 9 by a section of cable (soft copper wire) on connecting plate 3. The ground wire clamp 7 is a mouse clip structure, that is, the two splints are connected as a whole by the pin shaft 7.4, the spring 7.5 is installed on the pin shaft 7.4, and the swing rod 7.2 is installed on a splint through the pin shaft 7.1, and the swing rod The other end of 7.2 is supported on another piece of ground wire splint, makes the ground wire clip be open state, has the through hole 7.3 for swing bar 7.2 activity on another piece of splint. Alarm device 6 is installed on ground clamp 7. The alarm device 6 includes an oscillator composed of peripheral components such as BG1 and BG2 and a trigger circuit composed of peripheral components such as BG3. When the ground clamp is close to the charged object, BG3 is turned on, the base of BG2 has a high potential, the circuit oscillates, and the speaker emits a sound and an alarm. In the figure, K1 can choose different resistors to form different voltage levels of 220V, 66KV, and 220KV. AN is a test button, the circuit makes a sound when it is connected, and it can be checked whether the circuit is working normally. When AN is connected, the capacitor C3 is charged, the oscillator works, and the speaker Y makes a sound. When the AN is disconnected, the capacitor discharges, and after a certain voltage is placed, the oscillator stops working.

When the predictive induction grounding wire is used, at first the ground wire pile head is connected with the iron tower (ground wire), and then several sections of insulating telescopic sleeve type operating rods are pulled out in sequence until the required length is reached. Now the swing bar 7.2 supports two ground wire clamps, and the ground wire clamps 7 are in an open state, as shown in Figure 3 . When the operator brought the ground wire clamp 7 close to the wire, the alarm device 6 sent a "squeak" alarm. When the ground clamp 7 is in contact with the conductor, the conductor collides with the swing rod 7.2, causing the swing rod 7.2 to separate from one of the ground clamps. Under the action of the spring 7.5, the ground clamp 7 closes and clamps the conductor, as shown in the figure 4. When removing the grounding wire, the rocker 8 on the shaft 2 of the hand rocker 1 twists the cable and shortens the operating rod 4. This is convenient for storage and portability.

Claims (3)

1. A predictive induction grounding wire, which includes a cable and a ground wire clamp connected to one end thereof, and a ground wire pile head connected to the other end, and is characterized in that an induced voltage alarm device is installed on the ground wire clamp. 2. The predictive induction ground wire according to claim 1, characterized in that after the cable passes through the operating rod of the insulating telescopic sleeve, the tip of the cable is connected to the ground clamp, and the end of the cable is connected to the ground pile. 3. The predictive induction grounding wire according to claim 2, characterized in that the end of the operating rod of the insulating telescopic sleeve is installed with a roller through a connecting plate, the end of the cable is wound on the shaft of the roller, and there is another section of cable, One end of it is connected to the connecting plate, and the other end is connected to the pile head of the ground wire.

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