CN208256937U - Duck tongue type spiral compression formula earthing clamp - Google Patents

Abstract

The utility model discloses a kind of duck tongue type spiral compression formula earthing clamps, are related to transmission & distribution electro-technical field；Including wire hook, the rotary screw that is connected to the fixing seat of the wire hook bottom and is interspersed in the pedestal, Y type elastic slice is equipped on the inside of the wire hook, Open Side Down for the Y type elastic slice, in being placed with wire clamp pedestal in the fixing seat under the Y type elastic slice, the bottom end of the wire clamp pedestal is connect with the top of the rotary screw.The utility model can solve when need to carry out power transformation station equipment power failure hanging earthing conductor maintenance when it is long because stopping electric power feeding time, thus the problem of making increased costs.

Description

Duck tongue screw compression grounding clamp

technical field

The utility model relates to the technical field of power transmission and distribution, in particular to a grounding clamp used for temporary power failure grounding of equipment in a substation.

Background technique

The grounding wire is a kind of safety tool for temporary short-circuit grounding of the equipment that has been powered off. Its function is to prevent the sudden call of the equipment and the induced voltage generated by the adjacent high-voltage live equipment from harming the human body when the high-voltage equipment and lines are powered off for maintenance, and at the same time discharge The remaining charge of the de-energized device. Therefore, the maintenance equipment must be powered off, inspected, and installed with a grounding wire (closed with a grounding switch) to meet the corresponding safety measures.

At present, the grounding wire is installed in the substation mainly by hanging the grounding wire wire hook on the wire, and then pressing the wire clip base against the wire by rotating the insulating operating lever, thereby realizing the function of short circuit grounding. This ground clamp (Figure 2) has a wide range of applications for grounding on wires parallel to the horizontal ground, but it also has certain limitations. When there is a certain angle between the conductor and the horizontal ground, the insulated operating rod held by the operator must be perpendicular to or close to the conductor to hang the conductor hook of the grounding wire on the conductor. However, the wire hook of the commonly used grounding wire and the insulating operating rod are connected vertically (Figure 2). The problems of the grounding wire clip with this structure mainly include:

1. The existing grounding clamp can only be used for grounding the wires parallel to the horizontal ground. When it is necessary to ground the wires in the substation with a certain angle to the horizontal ground, the operator cannot hang the grounding wire on the wire or cannot connect the wire to the ground. The clamp base compresses the wire.

2. When it is necessary to hang the existing grounding wire on the wire with the help of a high-altitude vehicle, the power transmission work of the equipment in the station will be stopped due to the link of hanging the ground wire, which will increase the operating time of the operating personnel and increase the manpower and material resources.

3. Suspending the existing grounding wire on the wire with the help of a high-altitude vehicle has a safety risk of falling from a high altitude.

Utility model content

The purpose of the utility model is to provide a duck-tongue spiral compression ground wire clamp, which can solve the problem of increased cost due to the long time of power failure when the equipment in the substation needs to be repaired by hanging the ground wire.

In order to solve the above-mentioned problems, the technical solution adopted by the utility model is: the duck-tongue-shaped spiral compression grounding clamp includes a wire hook, a fixing seat connected to the bottom of the wire hook and a rotating screw inserted in the base , it is characterized in that: the inside of the wire hook is provided with a Y-shaped shrapnel, the opening of the Y-shaped shrapnel is downward, and a wire clip base is placed on the fixing seat under the Y-shaped shrapnel, and the bottom end of the wire clip base is connected to the fixed seat. The top end of the rotating screw rod is connected.

Among the above technical solutions, a more specific solution may be: the fixing base is provided with a ground wire bolt; the rotating screw rod is connected to the fixing base through a threaded through hole provided on the fixing base.

Going a step further: There are two of the ground wire bolts.

Further: the bottom end of the rotating screw rod is connected with the handle.

Further: the handle is provided with a slot for clamping the insulating operating rod.

Further: the handle is made of insulating material.

Due to the adoption of the above-mentioned technical scheme, compared with the prior art, the utility model has the following beneficial effects: since the Y-shaped shrapnel is arranged on the inner side of the wire hook of the utility model, when the operator stands on the ground, he uses the insulating operating rod to connect the ground to the ground. When the wire clip is hung on the wire, the Y-shaped shrapnel will clamp the wire under the action of the elastic force, so that the grounding wire clip and the grounding wire are in good contact; insert the insulating operating rod into the slot of the handle, and rotate the insulating operating rod to rotate The force is transmitted to the rotating screw rod, so that the rotating screw rod drives the wire clamp base to move, so that the wire clamp base and the wire hook clamp the wire.

Description of drawings

Fig. 1 is a structural block diagram of the utility model.

Fig. 2 is a schematic structural diagram of the prior art.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

The duck-tongue type spiral compression ground clamp shown in Figure 1 includes a wire hook 1, a fixed seat 4 connected to the bottom of the wire hook 1 and a rotating screw 7 inserted in the base 4, and the inside of the wire hook 1 is provided There is a Y-shaped shrapnel 2 (commonly known as a duck tongue-shaped shrapnel), and the Y-shaped shrapnel 2 opens downward. Under the Y-shaped shrapnel 2, a wire clip base 3 is placed on the fixed seat 4. The bottom end of the wire clip base 3 is connected to the The top of the rotating screw mandrel 7 is connected. The fixing base 4 is provided with a grounding wire bolt 5; in order to securely connect the grounding wire with the fixing base 4, two grounding wire bolts 5 are provided. The rotating screw rod 7 is connected with the fixing base 4 through the threaded through hole provided on the fixing base 4 . The bottom end of the rotating screw mandrel 7 is connected with the handle 8 . The handle 8 is provided with a slot for clamping the insulating operating rod. The handle 8 is made of insulating material.

When the ground wire is to be hung, fix one end of the ground wire on the fixed seat 4 with the ground wire bolt 5, insert the insulating operating rod into the slot on the handle 8, and lift the insulating operating rod so that the wire is between the wire hook 1 and the Between the wire clamp bases 3, pull down the insulating operating rod vertically, and the Y-shaped shrapnel 2 will clamp the wire under the action of elastic force. Rotate the insulating operating lever clockwise, driven by the insulating operating lever, the rotating screw 7 rotates, and the rotating screw 7 drives the clamp base 3 to screw in to the wire hook 1, so that the wire clamp base 3 and the wire hook 1 clamp the wire , so as to achieve the purpose of tight contact between the wire and the grounding wire clamp; when the grounding wire is to be removed, the insulating operating lever is rotated counterclockwise, driven by the insulating operating rod, the rotating screw 7 rotates, and the rotating screw 7 drives the clamp base 3 Unscrew the clamp base 3 from the wire, so that the wire is separated from the grounding clamp. Lift the insulating operating rod vertically upwards to make the utility model break away from the lead and remove the grounding wire.

Claims (6)

1. a kind of duck tongue type spiral compression formula earthing clamp, including wire hook, it is connected to the fixing seat of the wire hook bottom And it is interspersed in the rotary screw in the pedestal, it is characterised in that: Y type elastic slice, the Y type elastic slice are equipped on the inside of the wire hook Open Side Down, in being placed with wire clamp pedestal in the fixing seat under the Y type elastic slice, the bottom end of the wire clamp pedestal and the rotation The top of screw rod connects.

2. duck tongue type spiral compression formula earthing clamp according to claim 1, it is characterised in that: the fixing seat is equipped with It is grounded bolt；The tapped through hole that the rotary screw is equipped with by the fixing seat is connect with the fixing seat.

3. duck tongue type spiral compression formula earthing clamp according to claim 2, it is characterised in that: the ground line bolt has Two.

4. duck tongue type spiral compression formula earthing clamp according to claim 1 or 2, it is characterised in that: the rotary screw Bottom end connect with handle.

5. duck tongue type spiral compression formula earthing clamp according to claim 4, it is characterised in that: the handle is equipped with and is used for Block the card slot of insulating bar.

6. duck tongue type spiral compression formula earthing clamp according to claim 4, it is characterised in that: the handle is by insulation material Material material is made.