1. First of all, there is compressed air in the fireworks discharge pipe and a simple valve on the pipe. Even if it is a paper tube with fireworks, the valve can be opened by rotating the fireworks discharge tube, and the high-pressure air will eject the fireworks.

2. Hand-twisted fireworks discharge tube has no gunpowder, which is safe and environmentally friendly. It is loved by many people and is relatively simple to place. Hold the bottom of the fireworks barrel and it will be ejected with a slight twist.

3. The common specifications of fireworks display tubes are 5 cm in diameter, 40 cm, 60 cm, 80 cm, 100 cm, and the contents are colored strips+sequins (flashing), colored strip petals, happy characters, love and other shapes. The outer packaging is generally gold and red.

What's the difference between fireworks and fireworks?

First, the internal composition is different.

1, Fireworks: Fireworks are usually made in the form of fireworks, which do not necessarily contain gunpowder, but usually have sequins of various colors.

2, fireworks: the interior usually contains black powder and drugs. The interior will be filled with a large amount of gunpowder for launching, which is generally less than 3 inches in size.

Second, the use is different.

1, Fireworks: Fireworks are usually used in some festive occasions, such as parties and weddings.

2. Fireworks: Fireworks can be used for festive occasions and funeral occasions, especially during Tomb-Sweeping Day in rural areas.

Fireworks and the principle of fireworks

Fireworks structure includes black powder and drug guide. After the fireworks are ignited, the fuel is pushed into the launch tube and the fuel is confined in a certain space. For example, at the bottom of spherical fireworks, the heat and gas gathered here will produce strong tension in the launch tube. When it explodes, the air will expand rapidly, pushing the fireworks, producing a great initial velocity and rushing into the sky. Chemical reaction will cause explosion, and most of the energy released during explosion will be converted into light energy.