DIFFERENTIAL PISTON INJECTION DEVICE WITH CONTROL MECHANISM WITH PILOTED HYDRAULIC VALVES

Keywords: fertigation, injection device, differential piston INTRODUCTION The methods used to reduce the action of stressors for agricultural crops practiced on sandy soils, in arid, semi-arid or dry sub-humid climate conditions (atmospheric, pedological and agricultural drought, strong burns and ma...

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Bibliographic Details
Published in:Acta Technica Corvininesis 2021-01, Vol.14 (1), p.135-139
Main Authors: Şovăială, Gheorghe, Matache, Gabriela, Anghel, Sava, Popescu, Alina Iolanda, Necula, Cristian, Manea, Dragos
Format: Article
Language:English
Subjects:
Aridity
Chambers
Circuits
Crop diseases
Crops
Disease control
Drought
Fertilization
Fertilizers
Gluing
Hydraulic valves
Hydraulics
Irrigation
Irrigation systems
Irrigation water
Melons
Norms
Nozzles
Percolation
Pests
Photosynthesis
Plants (botany)
Potatoes
Sandy soils
Soil conditions
Soil water
Transpiration
Valves
Vegetation
Water shortages
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Summary:Keywords: fertigation, injection device, differential piston INTRODUCTION The methods used to reduce the action of stressors for agricultural crops practiced on sandy soils, in arid, semi-arid or dry sub-humid climate conditions (atmospheric, pedological and agricultural drought, strong burns and major precipitation deficit, with uneven distribution during the vegetation period of plants), (Lăcătu? V., 2016), are: = Selection of species with short vegetation period (potato, melons); = Selection of tolerant and drought resistant varieties based on physiological criteria (rate of transpiration, rate of photosynthesis, water forms); = Management of agrotechnical factors in order to increase the efficiency of plant metabolism (irrigation, fertilization, disease control and pests). Irrigation and fertilization of crops on sandy soils, in arid climatic conditions is achieved by the phase application with reduced norms of water and fertilizer, in order to avoid their evaporation and percolation under the root layer, taking into account the high temperatures during the vegetation period and the reduced sand soil capacity of water retaining. MATERIAL AND METHOD The differential piston injection device made by DOSATRON, Figure 1, (*www.dosatron.com - Dosatron: Water-powered proportional dosing pumps) can be located both on the main hydraulic circuit of the irrigation system (full flow), and on a circuit parallel to it (by-pass), and it uses irrigation water as a drive fluid. RESULTS AND DISCUSSIONS In the constructive version of the drive piston made by INOE 2000-IHP, the valves on the cone, actuated by the tilting mechanism with spring were replaced by hydraulic piloted valves (Anghel S. et al, 2019), which establish the connections between the chambers A and B, respectively between the chambers B and C. The piloting is done with the help of a piece 4.8 (on the surface of which a rubber tape is applied by gluing), which by tilting around the shaft 4.9 alternately closes one of the two nozzles 4.7, thus piloting the two hydraulic valves through the connections x-x or y-y.
ISSN:2067-3809