Arc extinguish chamber structure applied to direct-current high-voltage switch

The utility model discloses an arc extinguishing chamber structure applied to a direct-current high-voltage switch. The arc extinguish chamber comprises a plurality of vertical grid sheets (1), V-shaped end head grid sheets (2), an insulating part (3) and an arc extinguish chamber side plate (4), the arc extinguishing chamber side plate (4) is arranged on the outer side surfaces of the legs of theplurality of vertical grid sheets (1) and is used for fixing the plurality of vertical grid sheets (1); wherein the V-shaped end grid pieces (2) are arranged on the back surfaces of the plurality ofvertical grid pieces (1), and the V-shaped end grid pieces (2) are characterized in that two end parts (201a and 201b) of a V-shaped bent part (201) of each V-shaped end grid piece (2) are inclined towards the grid piece belly parts (101) of the plurality of vertical grid pieces (1). And the V-shaped bending parts of the V-shaped end grids of the arc extinguishing chamber structure are bent upwards, so that the arc length