SU1270749A1 - Throttling device - Google Patents

Abstract

The invention relates to throttle devices and can be used in water supply systems from underground sources by the downhole method using submersible centrifugal and axial pumps. The purpose of the invention is to simplify the device by achieving a valve in the form of a hollow body, the internal cavity of which is divided by the diaphragm and the lower and upper chambers, communicated with the outlet cavity by tubes, and the upper chamber is partially filled with gas and liquid, in which the end of the tube of the upper chamber is located. and a load is placed in the lower chamber. The valve floats and closes the channel section after the pumping unit has been shut down. 1 hp f-ly, 1 ill.

Description

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The invention relates to throttle devices and can be used in supplying the population, agriculture and industry with water extracted from underground sources by the well method by submersible centrifugal and axial pumps. The aim of the invention is to simplify the device. The drawing shows a device in a longitudinal section and in cross sections, the throttle device comprises a vertically mounted housing 1, the lower end 2 of which is connected to the inlet 3, and the upper 4 with the outlet 5 installed in the housing 1 between the inlet 6 and the outgoing 7 cavities valve and seat 8, along the perimeter of which are made hydraulic cut 9. The valve is made in the form of a hollow body 10, the internal cavity of which is divided by the diaphragm 11 into the lower 12 and upper 13 chambers communicated with the outlet cavity 7 by the first 14 and second 15 tubes. A load 16 is placed in the lower chamber 12. The hollow body 10 is provided with restraints 17. The throttle device operates in one way.

At the beginning of the pumping of the fluid by the pump, the valve has a buoyancy force greater than the force of the pressure of the fluid displaced by it. Ie saves, ensures the overlap of the seat 8. At this valve position, when creating pressure in the inlet cavity 6 during start-up, the pump unit runs water into the output cavity 7 only through the living section formed by the slits 9, which ensures the creation of the maximum hydraulic resistance during the starting period of the pumping station "

As the level of the water column in the exit cavity 7 rises, the volume occupied by the gas in the chamber 13 of the hollow body 10 decreases due to the entry of water from the exit cavity through the annular section formed between the tubes 14 and 15. I push 1. The throttle device containing vertically installed a housing, the lower end of which is connected to the inlet nozzle, and the upper end to the outlet nozzle, installed in the housing between the inlet and the cavities of the valve and the seat, along the perimeter of which slots are made, in order to simplify device, the valve is designed as a hollow body, the inner cavity of which a diaphragm is divided into the lower and verhnkda chamber communicated with the outlet cavity respectively, the first and second tubes, wherein the upper chamber is partly filled with gas and liquid, in which is located the lower end of the second tube

2. The device according to claim 1, about t l and so that the load is placed in the lower chamber. 49, the force acting on the valve decreases: As the level of the water column in the outlet cavity continues, the valve under the effect of increasing the gravity force passes the equilibrium state, moves away from the saddle 8 and plunges to the position of the interaction of the limiters 17 with the lower part of the body 1 and is kept in such positions for the entire duration of the pumping unit operation, ensuring that the whole living section of the saddle is completely open 8. After the pumping unit stops operating, the level of the water column above the valve gradually decreases b, will increase the pushing out force of the valve due to the displacement of water from the upper chamber 13 by compressed gas and, after a transition to the state of equilibrium, will lead to the ascent of the valve, which, in its original position, interact with the saddle 8, will block its living section. The throttle device works reliably in automatic mode, it has a simple design and low metal consumption.

Claims (1)

 Invention Formula AiA.