Oil port dustproof device for excavator oil tank

The utility model discloses an oil port dustproof device for an excavator oil tank. The device comprises a first cylinder body, a second cylinder body, a second frame body and a fixing plate, a secondframe body is welded on one side of the first cylinder body; springs are uniformly arranged in the second frame body; a fixing plate is installed at one end of each spring, fixing bolts are evenly arranged on the outer side of the second frame body, a second barrel body is fixed in the first barrel body, a first frame body is welded to one side of the second barrel body, grooves are evenly formedin the first frame body, and absorbent cotton is arranged in the grooves. According to the utility model, the fixing bolts, the fixing plates and the springs are arranged, so that the requirement offixing on the outer sides of oil ports with different sizes can be met; by screwing the fixing bolts, the fixing bolts are fixedly connected with the outer side of the oil port of the oil tank, meanwhile, the fixing plates extr