Polyurethane coating sleeve joint with good airtight effect

The utility model discloses a polyurethane coating sleeve joint with a good airtight effect. The connector comprises a male connector and a female connector, sliding rods penetrate through the two opposite ends in the male connector. A return spring is sleeved outside the sliding rod; one end of the return spring is fixedly connected with the male joint; the other end of the return spring is fixedly connected with a limiting plate; the sliding rod penetrates through the limiting plate; the limiting plate is fixedly connected with the sliding rod; the ends, away from the limiting plates, of thesliding rods are fixedly connected with pull buttons. The ends, close to the limiting plates, of the sliding rods are fixedly connected with clamping teeth. A fixed rod is sleeved outside the latch;the fixed rod is fixedly connected with the male joint; compared with the prior art, compared with the prior art, the utility model has the beneficial effects that through the special installation structure, the air tightness