螺旋输送——一种绿色环保的生产工艺
栏目:行业资讯 发布时间:2019-09-09

History

The first recorded use of a spiral for mechanical advantage was designed by Archimedes (287-212 BC) the Greek mathematician, physicist and inventor to remove water from the hold of a ship built for King Hiero of Syracuse .

最早记载使用的螺旋机械,是由希腊数学家,物理学家和发明家阿基米德(公元前287 - 212)设计的。他在为锡拉库扎国王Hiero建造的大船上,首次使用了螺旋输送的方式,用于除水以保持船体平衡。


 

It is said that Archimedes may have been the originator of two other forms of screw conveyors. One, a tube formed into a helix around a central shaft or core, is now not seen in use.

传说阿基米德还设计了另外两种螺旋输送方式。一种是将管子围绕中心轴形成螺旋结构,这种方法已经不再使用了。

 

The other, a helix rotating within a stationary casing, is the forerunner of the modern screw conveyor in its most common form.

第二种是在固定外壳内旋转的螺旋机,这是现代螺旋输送机的雏形,也是现在最常见的机型。

 

Screw Conveyors provide an efficient and clean method of conveying dusty bulk materials.

螺旋输送为散状物料提供了一种高效、清洁的输送方式。

 

Extracting bulk solids from a hopper by means of a Belt Feeder can be difficult to seal and result in lose of product and a dusty, dirty environment.

通过皮带输送从料斗中输送大块固体, 因为难以密封, 会导致产品丢失,并制造尘土飞扬的肮脏环境。

 

Mountains of dust can be seen below ever idler on this Belt Conveyor.

在这个皮带输送机下 可以看到灰尘堆积如山。

 

Here a Screw Feeder can be seen to provide a totally enclosed, dust free environment.

螺旋输送机能够提供一个完全封闭的无尘环境。

 

However, if the Screw Conveyor is not properly designed and built it can prove to be problematic.
Coal dust begins to build up on the centretube to flight interface

然而, 如果螺旋输送机设计或建造不合理的话, 也会产生各种问题。
比如,煤尘开始堆积在中心管或叶片接口。

 

Eventually the build up envelops the entire spiral and the efficiency drops to nearly zero.

最终煤尘塞满了整个螺旋输送空间,致使输送效率下降到几乎为零。

A different screw flight design should be Implemented.
Here is the same screw conveyor modified to use an Integraleg flight that was built by DFS Xiamen

我们需要一种不一样的螺旋叶片设计。
这是同一个输送机,但是叶片改用了厦门DFS生产的内脚螺旋叶片。



When the Screw Conveyor was driven until empty there was very little coal dust build up on the spiral and casing.
当输送机运输完成后,只有非常少的煤尘残留在叶片和套管中。

A purpose built screw flight to handle caked coal dust under a filter press.
这是一种用于处理压滤机壳体下结块煤尘的特制螺旋叶片。

Integraleg flights with a notched outer edge are used to break up the filter cake and stop it from building up on the centretube.
内脚螺旋叶片上的切口用于分解结块,以防止其堆积在中心管上。

In operation it can be seen that the filter cake is broken up into a conveyable state and the spiral is self cleaning.
运行中,它可以将结块分解为可输送的状态,从而达到自动清洁的效果。

Another example of a properly designed spiral conveying Lignite (Brown Coal)
这个用于输送褐煤的螺旋输送机,也是设计得比较合理的一个。

Careful consideration must be given to the spiral flight design below a hopper to ensure even and controlled product draw down within the hopper.
在设计料斗下的螺旋输送机适合需要仔细考虑如何控制料斗中的物料均匀出料。


There are many various Screw Configurations ,
螺旋叶片的配置可以多种多样,

Different effects on the bulk material can be achieved by varying the spiral configuration.
通过不同的螺旋叶片配置,可以达到输送 不同散状物料的目的。


Uniform Pitch Flights

标准螺距螺旋

Screws with a pitch spacing equal to the diameter are considered standard and are suitable for most conveyors of conventional horizonal design.

螺旋的螺距等于直径,一般应用于传统水平螺旋输送机上。


Tapered OD flights

变外径螺旋

Tapered OD flights provide a continuous incremental change in swept volume of the screw.

This promotes even drawdown in a full hopper situation.

Tapered OD flights leave residual material in the conveyor unless the casing is tapered to suit.

变外径螺旋的输送体积随外径的变化而变化。

在料斗满载的情况下,这种螺旋可以使得物料输出平均。

但是如果输送机箱体直径不变的话会产生输送死角。


Tapered ID flights

Coned flights

变内径螺旋

锥形螺旋

Conical flight centres provide a continuous incremental change in swept volume of the screw.

This promotes even drawdown in a full hopper situation.

Combined with variable pitch the coned screw provides the best possible solution to even hopper drawdown

Standard troughs can be used with coned flights.

变外径螺旋的输送体积随外径的变化而变化。

在料斗满载的情况下,这种螺旋可以使得物料输出平均。

配合变螺距的方法可以达到料斗满载时最佳的方案。

这种螺旋可以使用普通的箱体结构。


Integraleg Flights

内脚螺旋

Ribbon flights with integral support legs are used for sticky or cohesive materials that tend to build up on the flight-pipe interface.

带有内撑脚的带状螺旋一般用来输送粘性大的物料,这些物料如果用普通的螺旋输送的话会粘附在中心管壁以及叶片根部。

Notched flight Conveyor Screws


开口输送螺旋

Have notches cut in the periphery of their flights.

These notches supplement the conveying action with a moderate mixing action.

They can also be used to break up caked product.

叶片外围有切口。

这些切口将通过缓和搅拌辅助输送。

也可以用来分解结块的物料。

Notched and folded flight


开口折弯螺旋

Notched and folded flights provide a more aggressive mixing action

where material that passes through the notch is lifted and mixed with the trailing material.

They can also be used for aerating or cooling materials.

与普通开口螺旋相比,这种叶片提供更加有力的混合作用。 其原理是物料通过开口后被折弯的部分提升起来再落下。

这类叶片也可用于疏松或冷却物料。


Centreless flights

无心螺旋

Centreless flights are used for extremely sticky or fibrous materials that tend to wrap around or build up on a centre pipe.

无心螺旋用于输送那些容易环绕或堆积在中心管的极端黏稠的或纤维类的材料。


Compressing flights

The flights are canted forward

压缩螺旋

叶片向前倾

Compressing flight centres provide a continuous DECREASE in the swept volume of the screw.

This compresses and compacts the material as it is conveyed.

These flights are typically canted forward to counter the forces of the compacting process.

These are used in compacting, dewatering and decanting situations.

这种螺旋是倾角螺旋用于变直径的中心管上,物料传输空间被压缩从而达到压缩物料的目的。

常见于物料压缩机,除水机和螺旋倾析机上。


The True Helical shape

真正的螺旋形状

Whilst screw flights have been produced for centuries the process has been little more than blacksmithing.

Until recently helical shaped dies have been used to form a flight in a press of some description.

Unless the operator had the exact die with the exact pitch allowance for the screw flight material spring back then a true helical form would be very difficult to produce, if at all.

AST and now Ding Feng Spiral Technology of Xiamen have brought this process into the 21st century

A helix has two components: Curvature and torsion.

The TruHelix system address both these aspects of.

尽管螺旋叶片已经生产了几个世纪, 但是制造工艺几乎与锻造无异。

直至近些年,螺旋成型模具才开始被应用于叶片的成型。

但是,如果没有正确的模具结合精准的螺距余量以防叶片坯料产生弹性回变,要形成完美的螺旋几乎不可能。

AST和厦门顶峰螺旋科技有限公司将这种工艺带入了21世纪。

形成螺旋需要达到两个重要的因素:曲率与挠率,TruHelix系统解决了这两个问题。

 


The TruHelix System
 TruHelix
系统


顶峰螺旋科技生产的Tyro螺旋叶片成型机