How to inflate the balloon tube Instructions for use
How to inflate the balloon tube: the balloon mouth is wrapped around the air outlet on the right, hold the black head part, and insert the green part, you can hear the sound of gas flowing, and the balloon keeps getting bigger.
The principle of the pump
When using a pump, connect its air outlet to the valve of the bicycle tire. The function of the valve is to only allow air to enter the tire from the pump, and not allow the air to flow back into the pump from the tire.
The principle of the old-fashioned leather bowl pump: there is a gap between the piston of the pump and the wall of the cylinder, and there is a rubber bowl on the piston that is concave downward. When the piston is pulled upward, the volume of air under the piston increases, the pressure decreases, and the piston The air above is squeezed from around the rubber bowl to the bottom.
When the piston is pressed down, the air volume under the piston is reduced and the pressure is increased, so that the rubber bowl is pressed against the wall of the cylinder to prevent the air from leaking to the top of the piston, and the piston is continued to be pressed down. When the air pressure is enough to push the valve core of the tire , the compressed air enters the tire. At the same time, the air outside the cylinder enters above the piston from the gap at the upper end of the cylinder.
The new outer tube sliding pump is the simplest one-way valve. When the outer tube is lifted upwards, the air enters the air cylinder from the small hole on the middle sleeve at the lower end of the outer tube of the air cylinder. At this time, when the handle is pressed down, the air will enter the air cylinder through the one-way valve set at the top of the inner tube. Inner tube, follow the leather tube into the tire valve!
When the handle is lifted up for the second time, the one-way valve is closed, and when it is pressed down again, the air rushes through the one-way valve and enters the tire. That's the kind of back-and-forth.