CN201845662U - Moving contact of grounding switch - Google Patents

Abstract

The utility model relates to a moving contact of a grounding switch, which is used in high/low-voltage switch equipment and comprises a pair of parallel copper contact sheets; the front end of each contact sheet closest to the corner part of a static contact is provided with a notch; and the notch is filled with a filling block made of copper-tungsten alloy materials in a welding manner. The moving contact of the grounding switch has the advantages that: 1, as the part of the moving contact which can most easily generate electric arcs is filled with the copper-tungsten alloy materials, the anti-burning capability of the moving contact is greatly improved and both the moving contact and the static contact cannot be easily sintered, thereby ensuring reliable running of the equipment; 2, as the front end of each contact sheet of the moving contact is divided into two parts which can be relatively and independently deformed, the precision requirement when the moving contact is matched with the static contact is lowered and the conductive contact reliability is improved.

Description

Earthing switch moving contact

technical field

The utility model relates to a grounding switch moving contact used in high and low voltage switchgear.

Background technique

In ordinary high and low voltage switch cabinets, the grounding switch is usually a knife gate structure, which consists of a pair of rotatable conductive bars to form a moving contact. When the moving contact and the static contact are switched and matched, the distance between the front end of the conductive bar and the static contact The final corner will generate arc high temperature with the static contact, which will easily melt and sinter the local materials, making it difficult to open the gate and bring hidden dangers to the safe operation of the equipment. In addition, since the contact surface of the conductive row of the moving contact and the static contact is difficult to ensure absolute parallelism, the reliability of the conductive contact between the moving and static contacts is reduced, and the contact resistance is increased.

Contents of the invention

The technical problem to be solved by the utility model is to provide a grounding switch movable contact with strong resistance to burnout, not easily sintered, and high conductive contact reliability.

The moving contact of the grounding switch of the utility model includes a pair of parallel copper contact pieces. There is a gap at the corner of the front end of the contact piece closest to the static contact, and the gap is filled by welding with a filler block of copper-tungsten alloy material. .

The front end of the contact piece is provided with a longitudinal slot, which divides the front end of the contact piece into upper and lower parts.

The advantages of the utility model are: 1. Because the copper-tungsten alloy material is used to fill the position where the moving contact is most likely to generate an arc, the burning resistance of the contact is greatly improved, and the moving and static contacts are not easy to sinter, ensuring that the equipment Reliable operation; 2. Since the front end of the contact piece of the moving contact is divided into two parts that can be deformed relatively independently, the accuracy requirements when it cooperates with the static contact are reduced, and the reliability of conductive contact is improved.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

As shown in the figure, the moving contact of the earthing switch includes a pair of parallel copper contact pieces 1. There is a notch 11 at the corner of the front end of the contact piece closest to the static contact 3. The notch part is made of a copper-tungsten alloy material. The filler block 2 welds the filler. There is a longitudinal slot 12 at the front end of the contact sheet, which divides the front end of the contact sheet into upper and lower parts.

Claims (1)

1. A moving contact of an earthing switch, comprising a pair of parallel copper contact pieces (1), characterized in that: there is a notch (11) at the corner of the front end of the contact piece closest to the static contact, and the notch part It is welded and filled by a filler block (2) of copper-tungsten alloy material; a longitudinal slot (12) is opened at the front end of the contact piece, which divides the front end of the contact piece into upper and lower parts. the