According to different classification methods, the chute can be divided into a variety of forms. According to the chute geometry classification, can be divided into guide plate chute, straight chute, telescopic chute, folding line chute, spiral chute and other forms.

Telescopic chute is one of the most common forms.
applicable to most of the bulk material loading, which is characterized by the chute length
can be adjusted to meet the high water level of large ships, empty, low water full of the hull height of the ship
under the conditions of large differences in the use of the working conditions. 

When working, the outlet of the chute is as close as possible to the bottom of the ship's cabin,
which can effectively reduce the spillage of dust. 

The chute's telescopic mechanism usually consists of winches,
each telescopic section of the cylinder body is set up inside the positioning slide,
to ensure that the expansion and contraction of the cylinder section free.
The bottom of the chute can also be equipped with throwing shovels,
for the loading of materials that need to be leveled.

By telescopic chute, its internal design effectively controls the speed at which the material falls
and the outer side uses a telescopic protective cover to further avoid the escape of dust.

The telescopic section is usually connected by a wire rope to a winch which lifts the telescopic section
one after the other, keeping the bottom of the chute at a distance from the top of the storage pile.

The use of telescopic chutes reduces the dust considerably.
From practical use, it is particularly suitable for fertilizers.
Dust-generated materials such as alumina powder and coals;