Modern engineering has reached certain heights. More and more new technical products are constantly being developed that simplify or optimize a particular process. This article will focus on pumping devices, in particular, what a perist altic pump is. The product is quite interesting and currently necessary. Let's talk about everything in order and deal with its purpose, the principle of operation and other interesting points.
General information
A perist altic pump is needed to pump various liquids that move through curved tubes. Briefly, the essence of the operation of the device can be described as follows: there are special rollers that squeeze the tube in a certain place. Moving along it, they push the liquid to the destination. Allthe design consists of a small number of elements: a flexible hose or tube, rollers and a track (pressure surface). Although you can often find models that do not have a clamping surface. The track can be omitted if the tube is properly tensioned around the roller. Despite such a simple design, it is quite difficult to make such a pump on your own. This is due to the fact that it is necessary to comply with a number of requirements regarding working with viscous liquids, but we will talk about this a little later.
More details on how it works
We have already figured out a little about what a perist altic pump is. It is worth paying your attention to the fact that this device is often used not because of its expediency, but because there is no other way out. So, a perist altic dosing pump is often used. It is easy to guess that the main function of such a unit is to supply liquid to the working unit of any equipment in measured quantities.
It is on the perist altic principle that the work of the intestine, both human and animal, is based. The key difference is that in a living organism, muscle contraction takes place, which creates wall pressure on the fluid. In the case of the pump, the movement is provided by special rollers. They push the viscous substance in the course of its movement in certain portions. By the way, the perist altic pump dispenser has a very narrow scope.
A little more about the design of the product
As noted above, a positive displacement pump can bemake at home. But to do this is not so simple, despite the elementary design. In particular, because you will need special tubes for perist altic pumps, as well as rollers. It is desirable to bend the working hose into a C-shape, which will allow you to effectively place the rollers. The latter are mounted on a rotating rotor, which gives them movement at a given speed. When the roller rotates, it presses the hose against the body, forcing the fluid. Accordingly, a vacuum is created behind the second blade. After the end of the cycle (full circle), the shape of the tube is restored to its original state. To simplify the design and avoid the use of a check valve, the perist altic pump is equipped with two rollers that prevent the liquid from flowing in the opposite direction.
About scope
As noted above, the perist altic dosing pump is not used as often. The narrow scope of application is due to the material of the tube walls, which must be flexible. This prevents hot liquids from being distilled. Generally, the maximum operating temperature should not exceed 90 degrees Celsius. That is why such pumps are very rarely used in the organization of individual heating. After all, it is necessary to additionally install sensors for monitoring the temperature of the carrier.
As for the pressure, then there are some limitations. This parameter should not go beyond 16 bar. The key feature is that during pumping, the liquid does notcomes into contact with mechanical devices and metal surfaces. Therefore, pumps of this type are used where it is extremely important to maintain the purity of the viscous substance. In addition, the equipment is effective when working in an aggressive environment. The scope of use is usually limited to the food, chemical and pharmaceutical industries.
About the benefits of perist altic pumps
One of the main strengths is that such equipment can be used as dispensers. This is due to the fact that for each revolution the roller pumps a fixed amount of liquid. In addition, the liquid only comes into contact with the inner surface of the hose. This allows the pumps to be used in medicine and the food industry. But it should be understood that hoses for perist altic pumps must be of a certain material (non-toxic).
Another strength of these pumps is that due to the absence of turbulence, the structure of the liquid does not change. Often the pumped substance contains abrasive particles in its composition. Some pumps cannot handle such substances, and for this type of equipment this is not a problem. It should also be noted that nothing will happen to the perist altic pump if it runs dry, that is, if there is no liquid in the hoses.
Pump Types
There are monoblock devices. They are a single structure enclosed in a housing. It houses the engine, gearbox, as well as adjustment units. Decisionthe good thing is that the pump does not take up much space, but its maintenance is somewhat difficult.
There are also modular designs. It is easy to guess that such perist altic hose pumps consist of several parts. They take up more space, but are much easier to repair, since replacing one or another assembly does not require disassembling the entire pump.
In addition, perist altic pumps are classified according to the number of rollers. The more of them, the more uniform the movement of the liquid. The maximum number of rollers is 8 pieces. At the same time, the price of such equipment is quite high. But if accurate dosing is required, a pump with more rollers is needed.
DIY Perist altic Pump
The first step is to choose the right tubes. Although if the purity of the pumped liquid does not matter to you, then everything is not so bad here. But do not forget that the performance depends on the inner diameter of the hose. Materials often used are bioprene and marprene, as well as silicone and neoprene. Hoses can be made continuous or with fittings that allow them to be fixed in place.
Next, you can assemble the perist altic pump with your own hands. We use rollers of the required diameter, which will have to be bought at the store. It is better to set them in motion with the help of an electric motor through a shaft or a belt drive. We stretch the tube around the rollers and mount the whole thing in the case. One end of the hose is placed in a container, fromwhich the liquid is taken, and the second - to the destination. Pay attention to the fact that during operation the rollers evenly dispense the liquid, if, of course, this is important. In principle, there is nothing complicated. The main thing is to build a high-quality pump that will satisfy its performance characteristics. As a motor, you can use a small electric motor. Here it is extremely important to take into account the diameter of the tube.
About designation and configuration
Like any other pumping equipment, this is supplied as a kit. Usually there is a special passport, which indicates the equipment. The technical characteristics of the equipment are also indicated there. If you are going to buy a laboratory perist altic pump, then pay attention to such parameters as the type of impeller and the number of rollers. We have already figured out that the more videos, the better, but the equipment becomes more expensive due to its complexity.
Hose type and diameter matters. The scope of application depends on the material, and the performance depends on the diameter. In the end, there is such a parameter as power. In many cases, it is the main one and determines the efficiency of the equipment as a whole.
To ensure a more comfortable use of these pumps, you can buy additional components. If you assemble the pump in your workshop, then install the rotor speed controller. This will allow you to control the speed of rotation of the rollers, and hence the productivity.
Modelspumps
Home-made equipment requires almost no investment, but often such a pump does not meet technical needs. Therefore, it is advisable to buy a ready-made pump, even if not the most expensive and productive. A striking example of quality and affordable price is the Etatron F pump. It is able to distill only 2.2 liters of viscous liquid per hour. The price of such a purchase is about 4 thousand rubles. It is a very compact equipment that takes up very little space and can be installed anywhere. Such a small pump is enough to set up a small food production.
About Service
Any perist altic infusion pump has the advantage of being virtually maintenance free. The number of wear units and parts in this case is minimal. The flexible tube is subjected to the most intensive wear. Perhaps it is her for the entire period of work that will have to be changed once. However, this is not a very expensive element, due to the wide range of materials suitable for its manufacture, such as silicone. Although you can always experiment with changing the hose.
Conclusion
So we talked about what a perist altic pump is. This is quite an interesting piece of equipment. The simple design, as well as the durability of the parts, makes such pumps very profitable from an economic point of view. But you need to understand what to use them to provide water supply in the house or for sewageimpractical. For this, more efficient equipment has long been invented, with which there are practically no problems. In principle, now you also know how to make the simplest pump at home. It's not that difficult and won't take much time or effort.
