The principle and structure of the water absorber, what principle does the straw use to absorb water

When you say water suction device, you probably mean the so-called self-priming pump.

The structure of the right? That is, there is no need to irrigate before starting (the first start after installation still needs to be irrigated), after a short period of operation, relying on the role of the pump itself, the water can be sucked up and put into normal work.

Self-priming pumps are divided into the following categories according to the principle of action: 1Gas-liquid hybrid type (including internal mixing type and external mixing type); 2.Water ring wheeled; 3.Jet type (including liquid jet and gas jet).

The working process of the gas-liquid mixed self-priming pump: due to the special structure of the self-priming pump body, after the pump stops, there is a certain amount of water in the pump body, after the pump is started again, due to the rotation of the impeller, the air and water of the suction pipeline are fully mixed, and are discharged to the gas-water separation chamber, the gas overflow in the upper part of the gas-water separation chamber, and the water in the lower part returns to the impeller, and is mixed with the remaining air of the suction pipeline again until the gas in the pump and the suction pipe is all discharged, and the self-priming is completed, and the water is pumped normally. Water.

The ring-wheel self-priming pump combines the water ring wheel and the water pump impeller in a shell, and the gas is discharged with the help of the water ring wheel to achieve self-priming. When the pump is working normally, the passage between the water ring wheel and the water pump impeller can be cut off through the valve, and the liquid in the water ring wheel can be discharged.

Jet type self-priming pump, by centrifugal pump.

Combined with a jet pump (or ejector), it relies on a jet device to create a vacuum at the nozzle to achieve suction.

The exhaust fan inside the suction machine draws out the air inside the barrel, so that the air pressure inside the barrel decreases, and the water outside is pressed into the barrel.

When the fan blade rotates, the air in the machine is pumped out, so that the pressure in the machine is reduced, and the outside atmospheric pressure presses the water into it.

The straw uses the principle of atmospheric pressure, and when used, part of the air is sucked away from the straw, which will cause the pressure in the pipe to become smaller, and in order to balance the air pressure, the atmospheric pressure will force the liquid in the pipe to rise. When you stop inhaling, the trapped skin fluid in the tube drops and the pressure returns to equilibrium. This is the wonderful principle and application of straws.

Atmospheric pressure. Due to the force of gravity, the air exerts pressure on the object immersed in it, that is, atmospheric pressure, or barometric pressure for short. Since the air is fluid, it will have pressure in all directions.

At the same point, the air is equal in all directions.

In life, there is also a suction hook that uses this principle. When the suction hook is pressed against the wall, the air in the suction cup is squeezed out, which makes the air pressure in the suction cup smaller than the air pressure outside the suction cup, and the air pressure outside the suction cup presses the suction cup against the wall. There are also pumps, toilets, pumps, syringes for injections, pens for ink and so on.

When you suck, the pressure inside the straw will be less than the outside atmospheric pressure, and the water will be pressed into the mouth under the action of the outside atmospheric pressure, or think about it from another angle, will you feel that your mouth will be sucked into the teacup when you suck a teacup, if you make a hole in the back of the teacup now, the air will be sucked in, and the teacup with a hole will be imagined as a straw, because there is a hole on the same side, and then it is easier to understand that the air is a drink.

The straw material is mainly polypropylene, the straw produced by the regular manufacturer needs a lot of processes, and the qualified straw produced by polypropylene can withstand a high temperature of about 80, and will not emit a plastic smell when heated; Other unscrupulous traders use ** plastic products to make mixed plastics, and the quality of their products is difficult to guarantee.

By filling a tube with an inverted U-shaped structure and placing the high end of the liquid in a container filled with liquid, the liquid in the container continues to flow out through the siphon to a lower position. From Su Shi's "Dongpo Zhilin" in the Song Dynasty. The essence of siphon is due to the pressure of the liquid and the pressure of the atmosphere.

1. Using the force phenomenon of the height difference of the liquid level, after filling the liquid into an inverted U-shaped tubular structure, the end with a high opening is placed in a container filled with liquid, and the liquid in the container will continue to flow out through the siphon to a lower position. The essence of siphon is due to the pressure of the liquid and the pressure of the atmosphere.

2. In the 60s of the last century, several scientists in Sweden applied the principle of siphon to modern buildings, and initially solved the rainwater drainage system of the roof of the building. The siphon principle has been applied in building drainage, municipal drainage, water conservancy engineering and other aspects.

Siphon phenomenon

The water in the container can automatically flow out through a bend above the surface of the container, as if something is moving the water out of the container"Suction"Out one.

This is due to the pressure difference at work. When the pressure of the same liquid level on both sides of the elbow is different, the water (or other liquid) in the pipe will flow to the side with less pressure.

To be able to produce siphoning, the water outflow end of the elbow must be lower than the water inlet end. Let the water inlet end level be A, the water outlet end level is B, and the atmospheric pressure value acting upwards on the two horizontal planes is P0, but there is a water column of long h below the A side of the right pipe, so the pressure P P0 Gh on the same surface as A in the right pipe, that is, PO P, will cause the water column in the pipe to flow to the right pipe, and finally flow out from the B end. From this, the phenomenon of siphoning can be defined:

The phenomenon of self-flow of liquid due to the pressure difference caused by the height difference between the liquid levels at both ends of the communicator is called siphon phenomenon.

Careful analysis of the schematic diagram of the siphon can also know that the elbow should be filled with water in advance, and the air can not enter the entire elbow, otherwise, the pressure of the internal air will change the relationship between the pressure difference between the two ends, and the siphon phenomenon cannot occur.

When you suck, the pressure inside the straw will be less than the outside atmospheric pressure, and the water will be pressed into the mouth under the action of the external atmospheric pressure, or think about it from another angle, whether you will feel that your mouth will be sucked into the teacup when you suck a teacup, if you make a hole in the back of the teacup now, the air will be sucked in, and imagine the teacup with a hole as a straw, because there is a hole on the same side, and then it is much easier to understand the air as a drink.

The straw material is mainly polypropylene, the straw produced by the regular manufacturer needs a lot of processes, and the qualified straw produced by polypropylene can withstand a high temperature of about 80, and will not emit a plastic smell when heated; Other unscrupulous traders use ** plastic products to make mixed plastics, and the quality of their products is difficult to guarantee.

100,000 Whys: Why straws can absorb water, the principle is simple!

The pumps all adopt the pump body structure of axial liquid return. The pump body is composed of suction chamber, liquid storage chamber, scroll chamber, liquid return hole, gas-liquid separation chamber, etc., after the pump starts normally, the impeller will suck in the liquid stored in the suction chamber and the air in the suction pipeline together, and be completely mixed in the impeller, under the action of centrifugal force, the liquid entrained gas flows to the outer edge of the scroll room, and forms a white foam with a certain thickness on the outer edge of the impeller and brings it into the high-speed rotating liquid ring. The gas mixture enters the gas-liquid separation chamber through a diffusion tube.

At this point, due to the sudden decrease in the flow rate, the lighter gas is separated from the mixture, and the gas continues to rise and be discharged through the pump discharge port. The degassed liquid returns to the reservoir and enters the impeller again through the reflux hole, mixes with the gas sucked in from the suction line inside the impeller, and flows to the outer edge of the impeller under the action of the high-speed rotating impeller. As the process progresses over and over again, the air in the suction line decreases until the gas is exhausted and the self-priming process is completed, and the pump is put into normal operation.

When there is air in the pumping pipe of the pump, the negative pressure (vacuum) formed during the operation of the pump is used to pressure the water lower than the pumping port under the action of atmospheric pressure, and then discharge it from the drain end of the pump. There is no need to add "diversion water" before this process.

1. Accumulation pump: use the change of working cavity volume cycle to transport liquid.

2. Vane pump: use the interaction between the blade and the liquid to transport liquid.

It is the use of pressure, the machine will empty the air and water in the pipe to cause the pressure difference between the inside and outside, the atmospheric pressure will press the water in, and then the machine will pump the water out, and so on. Formation of suction machines.

The suction machine uses the pressure difference between the inside and outside to produce a strong suction.