Water is a very important resource, that people in first world countries take for granted because it is as easy as turning the faucet handle on. Humans can only survive three to five days without water and getting clean water in third world countries and in particular Buikwe District is a difficult problem. Most communities in this District get water from standing sources including rivers, lakes, and even puddles which are often full of dirt and other dangerous water borne diseases. In an effort to tap into the potable water just below the surface, the Rope pump Team has decided to take the widely known designs of one of the simplest and cheapest water pumps, the rope pump, and improve upon them. The team has enhanced designs for almost every component of the pump.
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Locally made, reliable, effective and affordable water pump also from deeper wells.
- Locally made, reliable, effective and affordable water pump also from deeper wells.
- The complete design of a sucker rod pumping system is an involved trial and error process.
- A centrifugal pump works by converting the energy of a spinning impeller to increase the velocity of a liquid.
This is an effective water pump, one of the simplest to make and maintain , even locally. It costs little and can be used in a variety of ways, whether operated by hand or using various energy sources. It can be used to pump water up from 7 to 35 metres , or even 60 metres for some models. The principle of this pump is a very old one as the Romans used it as did various later civilisations.
It had however been abandoned in favour of more modern techniques before being reused and improved in the mid-twentieth century. It seems to have reappeared in in Latin America Nicaragua before becoming highly popular on this continent, then in Africa and Asia.
It is currently used in some thirty countries. Primarily families or small communities in rural or suburban areas or in small towns that have only very limited resources as well as small farmers for irrigation purposes.
A rope pump is essentially made up of a wheel, a rope onto which pistons or rubber washers are attached at regular intervals, a PVC pipe and a guide block located at the bottom of the well.
The rope , in one piece, is driven from the top of the structure and down to the bottom of the well by a wheel grooved pulley most often actuated by hand using a handle, but that can also be driven by a motor, a horse, a windmill, a bicycle, etc. On the way into the well, the rope runs through a guide block so that it is precisely positioned to travel freely, along with the pistons attached to it, then it runs through a vertical PVC pipe.
The rope rises back up to the surface through the rising main , drawing with it the water taken from the bottom of the well and retained by the pistons or washers when they enter the PVC pipe. The rope Although the ideal rope material is polyethylene or nylon , almost any regular twisted or woven rope is suitable. Depending on the diameter of the rising main, the rope diameter generally varies between 4 to 8 mm.
This is the main, but also the most fragile pump component. Its condition must therefore be checked periodically and replaced before it breaks, falls to the bottom of the well, making it very hard to run a new rope through.
The wheel A grooved pulley is used that can be made very simply. It is possible, for example, to cut even a worn, but rigid car or van tyre in two. The two parts are then tightened together using four to six wheel clamps e. The wheel assembly can then be finalised using spokes similar to bicycle spokes connecting the wheel clamps to the wheel hub which needs to be properly centred.
The handle attached to the wheel may be actuated by two people at the same time, one on each side. For the sake of cheapness, the handle is often made by simply bending the axle. The guide block Its purpose is to protect and guide the rope at the bottom of the well. Often made in a mould from cast concrete, so that its weight will stop it from rising, it can also be made from PVC or if the right care is taken.
The rope guide block comprises a small vertical pipe that the rope enters into , that is flared on top, to facilitate piston entry, a glass bottle filled with concrete that the rope turns around, without becoming damaged, and a vertical connection to the PVC rising main. The pump structure Shaped like a double triangle linked by cross pieces, this structure is essential to holding the wheel axle in the right position and to stop it from moving sideways. It is generally made from welded steel bars or pipes.
It also allows adding wheel locking or braking mechanisms as the wheel may suddenly move in the reverse direction under the weight of the water remaining in the rising main, when pumping stops or a fixed pump cover.
It can however be made even more easily using plain wooden planks or by building two small parallel brick and cement walls between which the wheel will be mounted.
We recommend properly positioning the wheel axle , e. On some models, the wheel is placed outside of the structure and not in the middle. PVC guide tubes 1 Rising main It is important to properly determine its diameter , as the latter is a function of well depth as the deeper the well, the greater the weight of the water column and the more tiring the pumping effort.
RWSN Rural Water and Sanitation Network therefore recommends see table below reducing this diameter, for example, to 2 cm in excess of 20 metres. As PVC pipes exposed to the sun may deteriorate, we recommend varnishing them, preferably with a dark colour. The outlet pipe may be extended with a PVC pipe to directly supply a tank. Pistons or washers These are made fairly easily in moulds with shapes and stamps, from leftover plastics or using wood or rubber.
The pistons are generally attached to the rope with two ordinary knots one before the opening and the other after it every 70 cm to one metre a little further apart for deep wells.
Pump and well covering. Its protection Covering the rope extends its life by protecting it from the sun. Covering the well protects it from intrusions, spilling or unclean water seepage. These protections may be one piece or fitted separately.
We recommend setting up the well and protecting it with a fence made from simple locally available materials and building a surface area or edged slab slightly sloped, around it, most often made from concrete, so as to drain away any dirty or stagnant water that could seep into the source and pollute it.
Different kinds of rope pump The advantage of rope pumps is that they can be actuated in various ways , most often by hand, but also by a motor, a horse or a windmill for irrigation purposes , by solar power or even by a bicycle…. Motor driven pumps are mainly used for large scale irrigation or for drawing water from great depths , depths that may reach 60 metres. Note that it is also possible to pump water up from 60 metres, by hand, by installing two pumps. Rope pumps may also, but with greater difficulty, be used for drillings with a diameter of at least 10 cm, but this requires specific guides at the base of the drilling and on its upper structure.
It can easily be used by women and children. Some and even be made up locally. So around one second per metre if depth is required before water comes forth this can however be corrected by installing a specific system at the bottom of the well or by locking the wheel after use.
Do not wait for the rope to fall to the bottom of the well, as this could require dismantling the entire pump. Its tightness should be checked after the first few days in use.
If this is not possible, then we strongly recommend having detailed installation manuals available , like the ones mentioned at the end of this factsheet. Rope pumps are inexpensive. This also made it possible to significantly reduce the pump failure rate , as the pump owners themselves were able to maintain and repair them.
A technical manufacturing and installation guide. A clear, illustrated guide that is very handy and well documented, produced by the national commission for waterworks at Caritas Senegal in Dakar in collaboration with a number of other Caritas entities.
Exchange of experience visits between Senegal and Burkina Faso. An illustrated 16 page document relating various installations and the problems encountered. Published Caritas Burkina and Caritas Senegal. Facilitating access to water Reducing the cost of water Sanitation and preservation Awareness efforts on hygiene and health Organising and Managing.
Social or solidarity pricing Price of water Innovating methods and others. Collecting effluents Draining effluents Treating effluents Designing a project. General principles Methods. Governance of water and sanitation services Participative Community management. Ancient jug pump from the eleventh century Alcazar de Jerez Spain The principle of this pump is a very old one as the Romans used it as did various later civilisations.
Rope pump - village of Leba - Burkina. How is it used? For the sake of cheapness, the handle is often made by simply bending the axle The guide block Its purpose is to protect and guide the rope at the bottom of the well. Inserting the pipe and rope Pistons or washers These are made fairly easily in moulds with shapes and stamps, from leftover plastics or using wood or rubber. Different kinds of rope pump The advantage of rope pumps is that they can be actuated in various ways , most often by hand, but also by a motor, a horse or a windmill for irrigation purposes , by solar power or even by a bicycle… Various ways of powering a rope pump - Photos RWSN Motor driven pumps are mainly used for large scale irrigation or for drawing water from great depths , depths that may reach 60 metres.
Exemple of realizations done using this sheet' Be the first to write a work that you were able to do using these techniques. Other sheets E28 — Various types of wells and boreholes. General points E29 - Hand-dug wells E30 - Driven wells E Boreholes E32 - Importance and means for the maintenance of wells and boreholes E33 - Means of rehabilitation of old wells and boreholes E34 - Return to service and disinfection of wells E35 — Main types of hand pumps.
General fact sheet E36 — Advantages and disadvantages of hand pumps. How to select and maintain them? E37 - Presentation of some common models of hand pumps E39 - Hydraulic and treadle pumps E40 - Motor pumps E41 - Solar pumps E42 - Wind powered pumps E43 - Hydraulic pumps hydraulic ram E44 - Drinking-fountains E45 - Village hydraulics: Construction of mini water distribution networks E46 - The construction of gravity networks from springs or high-up expanses of water E47 - Connections to a network and social connections E48 - Construction standards for networks and structures: desirable simplifications in the poorest rural and suburban areas E51 - Solutions for irrigating kitchen-gardens and community market-garden produce E52 - Technologies for simple and efficient irrigation E53 - Micro-irrigation.
The "drop by drop" process E54 - Irrigation using ultraviolet resistant flexible hoses E55 - Irrigation using water retention agents based on biological swelling polymer crystals E56 - Irrigation by recycling waste water E57 — Irrigation pump for fields or market-gardens E58 - Low-cost treadle pumps for irrigation E59 - Animal traction type pumps.
This pressure, measured in pounds per square inch PSI , must be overcome by the pump in order to move the liquid. Another disadvantage mentioned was that children found it difficult to pump caused by too large of a pump pipe diameter and sometimes got hurt when the handle security break system was not functioning. We at that time had to find out if the people of a village that we offerded support for making a well or a water pump were ready to accept our conditions. Valveless pumps rely on friction with water clinging to the rope, which is moved at high speed, often using a bicycle to produce the required speed. Motorized Rope pumps can pump from wells down to 60m 10 Similar to the Hand pump model, it can be produced in local workshops using engines that are common in the country. Conditions are listed that are answered by this design.
Deign of rope pump. How to Convert GPM to HP
Implementation • Handpump Technology - Rural Water Supply Network
The Rope Pump features a unique design in which small plastic pistons are lined up on a rope. The distance between the pistons is approximately 1 m. The drive wheel is crank operated and pulls the rope through a plastic rising pipe. The drive wheel consists of cut old tires. A concrete guide box with a glass bottle at the well ground leads the rope with the pistons into the rising main pipe. RWSN work has particularly focused on rope pumps in Nicaragua, Madagascar and Mozambique and public domain standards and guidlines have been produced.
This pump type works with a loop of rope, which is pulled through a plastic riser pipe. Regularly spaced washers are fixed on the rope approx. At the pump stand, the rope is moved by a rubber lined pulley, mostly made of cuttings from worn car tires.
The pulley is operated with a crank handle in a steady speed, so that sufficient water is flowing from the spout. Because of the required clearance between the washers and the riser pipe, the movement of the rope needs a certain speed, so that the velocity of the drawn water is continuous.
As soon as the operation stops, the water in the rising main will drain slowly. However, there are different models existing that are suitable for larger communities and also to be installed on boreholes. The rope and washer pump has the advantage of a simple design and fairly easy maintenance. Pump stand and crank made of painted steel pipes, cover of galvanized and painted tin plate, drive pulley of rubber and mild steel, pistons of plastic, guide box of concrete, PVC-U and glass, rising main of PVC-U pipes.
The Madagascar Rope Pump is reasonably corrosion resistant. The installation of the Rope Pump is easy. It can be done by trained area mechanics. No lifting tackle and no special tools are needed. Torn or broken ropes can be replaced without special tools. A village caretaker is able to perform all maintenance operations required. This rope pump is usually installed in dug wells. Even though it is not limited in pumping lifts, the major application range is up to 15 m.
The Rope Pump is not designed for a high daily output, but rather a family or small community pump. ERPF, K. KEEN, J. The mode of operation of a Rope Pump This pump type works with a loop of rope, which is pulled through a plastic riser pipe. Material Pump stand and crank made of painted steel pipes, cover of galvanized and painted tin plate, drive pulley of rubber and mild steel, pistons of plastic, guide box of concrete, PVC-U and glass, rising main of PVC-U pipes.
Local manufacturing The Rope Pump has an excellent potential for local manufacturing. Installation The installation of the Rope Pump is easy. Technical data Piston nominal dia. Remarks This rope pump is usually installed in dug wells.
More Information Ropepumps. Supported by. Member Organisations. EN FR.