What Are Trench Boxes?

Wind box, a device used to generate wind, consists of a wooden box, a push-pull wooden handle, and a movable wooden box. The operator opened the movable wooden box by hand. The air filled the bellows of the bellows with air through the air inlet, and the bellows did not collapse, and then the body was pulled out to squeeze out the air. It enters the melting furnace and is used for ironmaking. The most common type consists of wooden boxes and rectangular movable wooden boxes, which are used to blow air and make the fire flourish.

Bellows

The earliest instruments used for forced air blowing were fans and blow pipes.

This is an extremely simple and clever invention. In a functioning rectangular box, there are air inlets at each end of the box: when the rectangular box is pulled out by hand, air is sucked in from the far end; when it is pushed, air is sucked in from the near side . In both inward and outward processes, air is sucked into the box; in both cases, the compressed part of the air is pushed into the side chamber and discharged there through the exhaust port. It can not only blow air, but also spray liquid. ^[1]

In the past, every family's stove room in rural areas had brick stoves made of bricks, and a bellows was placed next to them. After filling the pot with water, ignite the firewood and put it in the mouth of the stove, pull the bellows with the right hand, and add firewood with the left hand.

Modern rural areas are rarely used, except during the New Year, such as in Dali County, Weinan, which is occasionally used during steaming around around the 23rd of the month. Every household now uses gas stoves, induction cookers, etc. The bellows has long been eliminated, and the era of bellows has become history. ^[2]