What is the working principle of balloon pump? Why can't the air filled in the balloon be pumped out when the piston is pulled back?

The working principle of the balloon inflator is that air is sucked into the storage area by pulling, and then the air needed by the balloon is injected or replenished by pushing. Due to the one-way valve structure in the pump, the air injected into the balloon will not flow back into the pump.

When the piston is pulled up, the air volume under the piston increases and the pressure decreases, and the air above the piston is squeezed to the bottom from around the rubber bowl. When the piston is pressed down, the air volume below the piston decreases and the pressure increases, so that the rubber bowl abuts against the cylinder wall to prevent the air above the piston from leaking, and the piston keeps pressing down, and compressed air enters the balloon.

Maintenance of extended data cylinder

1, the pump needs to be stopped when it is overheated, otherwise the life of the pump piston will be shortened.

2. Don't add too much lubricating oil to the cylinder, and apply it directly to the piston head and the inner wall of the cylinder on the principle of small amount and multiple times.

3. It is necessary to dismantle the pump regularly to clean up the sludge, because there is a lot of dust in the air, which will be mixed with the oil and steam in the pump after being inhaled to form sludge. If there is too much sludge, it will block the small hole of the third-stage piston head or block the air outlet of the cylinder block, resulting in poor air outlet.

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