1. Definition
A spray pump is a pump product that atomizes and sprays the contents.
2. Classification of spray pumps
At present, there are many models and styles of hand-operated pumps on the market, and detailed descriptions are often attached to each type of pump, but in terms of structural design and technology, they can be roughly classified into the following six categories.
(1) The first category of general operation pumps. When the pump is pressed by hand, the desired product can be sprayed out under the action of force. When pressurizing this kind of pump, the speed and force of pressurization have an effect on the working state of the pump. For example, strong and rapid pressurization can make the pump achieve the best spray effect (such as finer droplets, larger fog cones or longer range, etc.).
(2) The second type of ordinary two-stage pump. This pump is equipped with two seals, a spherical ball seal and a secondary plastic seal. The pre-pressing action of the second stage can make the pre-pressed material spray the liquid medicine through the nozzle.
(3) The third type of modified two-stage pump. The operating principle of this pump is similar to the two-stage pump system with spherical seal and plastic seal described above. It does not use ball and ball seals in structure; it uses the principle of shaft ring pressure sealing, and its performance is superior to the former.
(4) The fourth type of pump works the same as the third type of pump, but has no separate air supply channel, is completely sealed, isolated from the atmosphere, and must be inflated. This type of pump is essentially a quantitative pump.
(5) Category 5 This type of pump is also similar to the two-stage pump. It is usually under non-inflated pressure. Once the tank is filled with air, it will seal itself. When the piston is actuated, the passive piston of the pump compresses the spring making the pump an up-reverse valve. The contents in the container can only be discharged to the predetermined volume when the active piston is pressed down to the set distance, and will not be discharged when the piston does not reach the set distance, thus ensuring the accuracy of the discharge volume. This kind of pump also belongs to the quantitative pump.
(6) Category 6 This is a new type of pump system improved on Category 5 pumps. When the pump is in operation, the container is only sealed when the valve is depressed. The content of the quantitative chamber of the pump is sealed by the sleeve and the wall of the pump body. When the nozzle is pressed, the contents of the quantitative chamber are discharged, which can prevent the chance of the liquid in the container coming into contact with the metal parts and ensure that the liquid will not come into contact with the metal parts. Contamination affects quality and performance.
Of course, different manufacturers have their own design styles and characteristics, forming their own classification series, but they are inseparable from the same principles, and they cannot cross the above six aspects.
3. Working principle of spray pump
When the pressing head is pressed down for the first time, (because the body and the ball valve are sealed) the gas in the body will be compressed. When the piston is pressed into the lower end of the body, the gas in the body will be discharged from the nozzle through the gap between the main column and the sub-column. , when the head bounces up, the piston and the sub-column are in a sealed state, and the piston and the main body are also in a sealed state, and then continue to rise under the action of the spring force, so that a sub-vacuum state is formed in the main body to generate suction (or from the physical From an angle, it is the force of atmospheric pressure), which will make the liquid enter the body through the straw and the ball valve.
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