Normally-closed quick release valve

The utility model discloses a normally-closed quick release valve. The valve comprises a valve body and the like, the valve element is located in the valve body. The pressure spring is fixed on the valve core; the three-way joint is positioned on one side of the valve body; the three-way pipe seat is fixed at the bottom of the valve body; the air inlet column is fixed to one side of the valve body, the air inlet is located in the air inlet column, the air supply port is located in the top of the valve body, the exhaust port is located in the outer side of the valve body, the valve switch is connected to one side of the valve body and located between the exhaust port and the air inlet column, the sealing rings are located between the valve element and the valve body, and one end of the three-way pipe base is provided with positioning grooves. According to the utility model, gas flows in the valve body, so that the normally-closed quick exhaust valve supplies gas to the rubber capsule; the expansion and contrac