The micro spray head is an important part of the micro spray irrigation system, which is directly related to the spraying quality and reliability of the whole system. According to the existing structure and working principle of the micro spray head, it is generally divided into four types of jet, centrifugal, refraction and gap.
At present, the most commonly used micro spray heads in the micro spray irrigation project in the protected area mainly consist of two kinds: Refraction and jet. Refraction type has no rotating parts, which is generally known as fixed micro spray head; The jet type is different, because the spray head is also constantly rotating when it is spraying, which is also called the rotating micro spray head. The working pressure of the micro spray head is generally from 50 to 2000Kpa; Its diameter is from 0.8 to 2.2 mm, and the amount of water spraying is generally less than 240L/h.
1. Save energy
The design working pressure of the micro spray head is generally from 15 to 20m water head. And thanks to the local water supply, compared with the spray irrigation, the water supply and lift of the system are greatly reduced, and the effect of energy-saving is very obvious.
2. Save water
The utilization efficiency of irrigation water is high. Water saving of the micro spray irrigation system is mainly reflected in reducing water-bearing soil area, controlling irrigation depth, and reducing evaporation and leakage losses.
3. Strong system combination performance
It is mainly reflected in the different combinations of various spraying diameters and rainfall intensity that are formed by adjusting the nozzle and water divider, so as to meet the different needs of fruit trees during the process of growing from saplings to big trees. In some cases, the micro spray irrigation system can be easily converted to the drip irrigation system. The micro spray head can adjust its working position at any time, such as on the tree or among the rows and plants. It can be used in the application of water and fertilizer integration technology.
4. Control weed growth
Especially when the diameter of spraying water does not exceed the area of shade cover, the ground exposed to the sun can not get water supply, which leads to the corresponding reduction of weeds.
5. Control the moisture on the surface of leaf
For irrigation with sewage and salt water, it can prevent damage to crop leaves. Conversely, when it is necessary to moisten the surface of leaf or improve the microclimate of the field, the micro spray head can be moved to the tree canopy and can also be used to prevent frost damage.
6. It is less affected by wind than the spray irrigation system and has little interference to field operation
Due to the low working position and small spraying elevation angle of the micro spray head, it can still be operated in the windy season. Because the pipe and micro spray head are easy to move, it does not affect the operation of farm machinery in the field.
7. Reduce system investment
Because of the use of water supply with low pressure and small flow, the demand for water supply capacity of the system is reduced, so that the calibers of all levels of pipelines are reduced, and the pressure grade of the pipe is reduced, and thus the dynamic power of the system is reduced. As a result, the total investment of the system is greatly reduced. What's more, it can achieve labor saving and easy automation.
8. It is suitable for a variety of terrains
9. Ensure the normal growth of crops
For crops on the saline-alkali soil, the micro spray irrigation system can be used to create a low-salt concentration zone in the root zone of crops to ensure the normal growth of crops.
The micro spray irrigation system is widely used in the humidification and cooling of the planting places of vegetables, flowers, orchards, medicinal materials as well as places for the culture of saplings, feeding places and other areas.
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