SU1373870A1 - Pneumatically-driven pump - Google Patents

Abstract

The invention allows to increase the efficiency of the pump. The holes 12, which are made on a step of smaller diameter of the differential piston, communicate a sub-piston cavity with a source of driving medium during the period of injection. The lower end of the nozzle 13 is located at the point of connection of the injection pipeline (TB) 7 to the housing 1, the base of which is made in the form of a cone. When the piston 2 moves upward, the pumped liquid enters the TB. At the same time, through the openings 12, the air is blown into the sub-piston cavity and then into the TB, creating an ejection effect in the diffuser 14, and pumps the liquid through the TB. 1 il.

Description

(L

with

with

00

eleven

The invention relates to pump construction, relates to pneumatic pumps.

The purpose of the invention is to increase the efficiency of the device.

The drawing shows a diagram of the pneumatic drive pump.

The pneumatic pump contains a differential piston 2 installed in the housing 1, a bellows 3 forming a pump chamber with intake D and pressure 5 valves, intake 6 and pressure 7 1 pipelines.

In the housing 1, the channels 8 and 9 are made for supplying and discharging the drive (compressed air), the bypass channels 10, the sealing ring 1 1.

The piston 2 is made differential with orifices 12 on a step of smaller diameter. The bellows 3 is fixed with one end on the piston 2, and on the other side of the housing 1.

(: the chamber is provided with a nozzle 13, the lower end of which is located at the point of connection of the injection pipe 7 to the housing 1, the base of which is made in the form of a cone, forming an ejector-type diffuser 14.

Pneumatic pump works as follows.

In the initial position, the piston 2 is in its lowest position. In this position, the inlets of the bypass channels 10 are blocked and the opening of the channel 9 is open. Compressed air is continuously supplied through channel 8 to the sub-piston cavity. Under the action of compressed air, the differential piston 2 moves upward, the air in the over-piston cavity, through the channel 9 enters the atmosphere.

When the piston 2 moves upward, the BELLOW 3 is compressed, while the pumped liquid, which is in

738702

bellows 3, through valve 5 (valve 4 is locked at this moment) through pipe 13 to discharge pipe 7. At the same time, through holes 12, made at a stage of smaller diameter of the piston 2, air is released into the piston cavity and then into the discharge pipe

Q 7, creating an ejection effect in the diffuser 14, and pumps the liquid through the pipeline 7.

Upon further upward movement of the piston 2, it closes the opening of the inlet channel 9 and opens the apertures of the overflow channels 10. At this moment, the openings 12 of the piston 2 are blocked by the sealing ring 11. Compressed air flows through channels 10 to the 20th piston cavity and moves the piston down. At this moment in the bellows 3, forming the pump chamber, a vacuum is created and through the suction pipe 6 through

25 valve 4, the pumped liquid enters the BELLOW 3, then the process repeats.

Claims (1)

Invention Formula A pneumatic pump containing a piston installed in the housing and BELLOW, forming a pump chamber, channels for supplying and discharging the drive medium, suction and discharge valves and pipelines, characterized in that, in order to increase operating efficiency, the piston is full differential with holes at a smaller diameter stage telling a sub-piston cavity with a source of driving medium during the period of injection, the pumping chamber is provided with a nozzle, the lower end of which is located at the point of attachment of the discharge pipe line to the body, the base of which is made in the form of a cone, to form an ejector-type diffuser.