Changes

绳子与水桶

683 bytes removed, 02:36, 25 October 2015

no edit summary

[[Image:rope and bucket icon.png|right|80px]]

[[Image:RopeandBucketphoto.jpg|thumb|right|200px|绳子与水桶装置。塞内加尔考拉克地区，法斯•图库勒尔，图片来源： 绳子与水桶装置。塞内加尔的考拉克地区，法斯•图库勒尔，图片来源：

[http://appropriateprojects.com/node/731 （Fass Toucouleur）法斯•图库勒尔水井改善工程]]]

__NOTOC__ <small-title />

This device is mainly used with hand-dug wells. A bucket on a rope is lowered into the water. When the bucket hits the water it dips and fills, and is pulled up with the rope. The rope may be held by hand, run through a pulley, or wound on a windlass. Sometimes, animal traction is used in combination with a pulley. Improved systems use a rope through a pulley, and two buckets – one on each end of the rope. For water less than 10 m deep, a windlass with a hose running from the bottom of the bucket to a spout at the side of the well can be used. However, the hygiene of this system is poorer, even if the well is protected.这一装置主要与手工挖掘井工具一同使用。将桶系在绳子上降到水中。当桶碰到水的时候会下沉并装满水，再用绳子把它拉上来。绳子可以由手拉动，运用滑轮或绕在绞盘上。有时，畜力牵拉可与滑轮一同使用。改良的装置会将绳子绕过滑轮，再用两只水桶——绳子两端各系一只水桶。对于浅于10米深的水而言，可以使用带有软管的绞盘，软管从水桶底部连到井的出水口。然而， 即使是水井受到保护，这一装置的卫生情况较差。

===适宜条件===

! style="background:#f0f8ff;" | 不足

|-

| valign="top" | - Simple technology which is inexpensive to build and maintain.技术简易，造价与维护费用低廉<br>- Can be operated at depths of up to 100 m.最深可在100米处运作<br>- Water Delivery from Animal Operated Rope and Bucket Water Lifter of over 200 l/min for double bucket system.通过畜力运作的绳与双桶提水装置能每分钟供水200多升<br>

| valign="top" | - Water Delivery from Human Operated Rope and Bucket Water Lifter is limited to 15 l/min.<br>

- Animals need to be maintained all year even when irrigation is not necessary.<br>

Range of depth: 0–15 m (or more sometimes).

Yield产水量：Yield: 0.25 litres/s at 10 m.

The simplest and cheapest method of lifting groundwater remains a rope and bucket in a wide, shallow well. This type of well can operate up to a depth of 100 metres, although they rarely exceed 45 metres. The rope and bucket lifter can be operated by humans or animals. Human operated rope and bucket lifters typically raise 10-15 litres/min from depths of 10-15 metres whereas an animal water lifter can raise 150 litres/ min from 15 metres. In the animal driven rope and bucket lifter, the rope attached to the bucket is passed over a pulley and fixed to the animal. The animal is driven down on an earthen ramp sloped at an angle of 5-10 degrees in order to lift the water.

• ← Older edit
• Newer edit →

Grace

307

edits