First, the use of the pneumatic joint with open ends: first, when it is connected, insert the child's body into the mother's body, and the ferrule will be pushed to the previous position under the action of the spring pressure, causing the steel ball to lock. The fluid will flow, and the o-ring inside plays the role of preventing liquid leakage. When it is not connected, the ferrule on the parent body will be pushed to the other end, and the steel ball will automatically roll outward. In this case, the child's body will be removed, because the child's body and the parent's body are both Without a valve, the fluid inside will flow out. Second, the usage of the single-way open-close pneumatic joint: First of all, when it is connected, insert the child's body on the side of the mother's body with the ferrule, and the valve will be opened at this time, and the fluid will naturally flow out. Further, the washer will be pushed back to its original position under the force of the spring, at this time the stainless steel bead will be automatically locked to ensure the connection between the child's body and the mother's body, and the inner washer can completely prevent fluid Of leakage. In the case of disconnection, when the ferrule on the mother body moves to the other end, the stainless steel ball will automatically roll outwards, and the child's body will be bounced under the reaction force of the spring. At this time, the valve is also It will automatically close, thereby blocking the flow of fluid. Third, the use of pneumatic joints with open and closed ends: When not connected, the stainless steel bead will automatically roll outward when the ferrule on the mother body is at the other end, and the child body and the mother body will be caused by the valve spring. Under the condition of the force, the valve of the child's body and the parent's body will be closed automatically, and the flow of fluid will be blocked quickly. In the case of linking, insert the child's body into the mother's body, the force of the spring will push the ferrule to the original position, and at the same time, the ball will be automatically locked to connect with the child's body precisely. At this time, the child's body and the mother's body The valve will open under the action of pushing each other, fluid will circulate, and the o-ring will start to work, completely blocking the leakage of fluid.