National economic development and improvement of the people's wellbeing require increasing of industrial, agricultural and domestic water supply one of the main sources of which is underground water. In the majority of countries in the world only small part of resources of underground water is exploited now. Nowadays in connection with the reduction of resources of surface water the disposal of underground water for different purposes is greatly increasing.
The creation of high-lift and highly productive equipment for petroleum production is of great importance for national economy. Mineral resource industry needs such equipment for unwatering of mines very much. The volume of well-drilling for mineral water extraction is increasing. To dry up such well (the depth of which sometimes reaches 1000 m and more) it is necessary to use high lift pumps.
Equipping of unwatering boreholes bored for the purpose to dry up mineral deposits and wetlands with down-pumps is of no small importance.
Nowadays in our country and abroad many various technical means are used for artificial lifting of liquids developed for different operating conditions that are distinguished constructively and according to principles of operation.
One of the most promising liquid lifters which satisfy different operational conditions is down displacement pumps with hydraulic drive.
Pulse piston pump NIM-73 falls on power pipes 2 in elevating and is established on a special saddle (paker). In a starting position the spring 16 keeps the piston 12 and a rod 4 in the top position. The rod 4 bottom ledge moves a zolotnik 6 upwards, disconnecting over the piston a cavity from elevating pipes.
The liquid from the elevating power pump moves on a column of power pipes 2 through the central aperture in a rod 4 in over the piston a cavity of the cylinder of the immersed pump. Pressure of a power liquid, operating on the piston 12, moves it downwards, compressing a spring 16.
The pumped out liquid through the delivery valve 18 is superseded in elevating pipes.
At movement of the piston 12 downwards, the zolotnik 6 is kept in the top position by pressure ïðèâîäíîé liquids since the effort to a zolotnik from below will be more on size of a difference of its areas.
In the bottom position the rod 3 rests 4 top ledge against a zolotnik 6 and moves it downwards. Thus over the piston the pump cavity incorporates to elevating pipes. The liquid through a lateral crack in çîëîòíèêîâîé to a box 5 moves in elevating pipes. Pressure in over the piston cavities falls also a spring 16 moves the piston 12 upwards. The liquid from a chink through soaking up valve 22 arrives in under the piston a cavity of the cylinder of the pump. The bottom ledge of a rod rests against a zolotnik 6 and moves it upwards. The cycle comes to an end.
Further the work cycle chink the pump unit repeats.
The scientific significance of work consists in possibilities of use of the received theoretical model of work of the pulse pump and application of results in mountain and a petroleum industry. The practical result is expressed in use of the developed design which allows to increase quality swing liquids from the big depths.
The given invention was based on the task of improving of borehole pumping unit in which due to providing of periodic connection of the cavity below the piston of a hydraulic engine’s cylinder with the outlet port and due to forcing of fluid out of the cavity above the piston of pump’s cylinder a great height of lifting and fluid supply are reached.
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