SU1323764A1 - Pneumatic positive-displacement pump - Google Patents

Abstract

The invention relates to pumping equipment and may be. used in an apparatus x for pumping contaminated liquids prone to foaming, in textile finishing machines and production lines. The purpose of the invention is to increase durability by increasing the height of the fluid lift by damping the drain valve (K). Hermetic tank (GE) 8 with K 9 is installed in housing 1 and connected to its upper part by capillary 10. At the moment float 2 begins to emerge, any slight opening of K 9 causes a sharp decrease in pressure force on K 9, and capillary 10 does not have time to fill air loss from the GE 8. When the float 2 is flooded, the time for the liquid to be expelled by air from the housing 1 is sufficient so that a sufficient amount of air passes through the capillary 10 into the GE 8. 1 il. 7ff With a ya Sla Ts :) with about 4

Description

The invention relates to machines and apparatus for pumping contaminated liquids prone to foaming in textile finishing machines and flow lines.

The purpose of the invention is to increase durability by increasing the height of the fluid lift by damping the drain valve.

The drawing schematically shows a pneumatic replacement pump.

A pneumatic kneading pump consists of a housing 1 with a float 2 placed inside it, a suction and discharge nozzles 3 and 4 with valves 5 and 6 and a drain valve 7 connected to the float 2, and the pump is equipped with an airtight container 8 with a valve 9 mounted on housing 1 and connected to the upper part of the latter by means of a capillary 10, and valve 9 is rigidly connected to a drainage clan 7.

The pump works as follows.

The suction pipe 3 of the housing 1 is attached to the pumped bath (not shown), from which the liquid through the valve 5 under its pressure passes into the interior of the housing 1, raising the float 2 floating in it.

The compressed air, continuously supplied to the upper part of the housing 1, flows freely through the drain valve 7.

The float 2 rises to its extreme upper position, i.e. all the way to its bottom in the pipe 4, and stops. Continuing to flow through the valve 5, the liquid is poured into the float 2 open at the top and it sinks. The drain valve 7 associated with the float 2 closes the outlet for compressed air from the housing 1.

The fluid from the housing 1 through the valve 6 and the injection pipe 4 is forced out to the consumer. As the displacement progresses, the level of the liquid is compared with the upper edge of the open-top float 2 and beyond this level outside of the float 2 does not fall.

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The fluid is further expelled only from the float 2. A lift force is created, which tends to push the float 2 upwards.

Upon reaching the equilibrium preceding the ascent of the float 2, there is another force affecting the equilibrium — the pressure force of the compressed air on the valve 9 inside the additional tank 8, passing from and to the float 2 downward.

The size of the valve seat 9 and the seat of the drain valve 7 are adjusted so that the pressure force of the compressed air on the valve 9 is greater than the pressure force of the compressed air on the drain valve 7.

At the moment of the start of the float 2, both these forces begin to decrease. But, in view of the fact that the additional container 8 is connected to the upper part of the housing 1 by the capillary 10, whose cross section is small, any slight opening of the valve 9 causes a sharp decrease in the air pressure force on the valve, 9. Capillary p 10 does not have time to replenish the loss of air from the tank 8.

During flooding of the float 2, the time for the liquid to be expelled from the housing 1 is long and quite enough for the required amount of air to pass through the capillary 10 into the additional tank 8 and the pressure in the tank 8 and the housing 1 are compared.

Claims (1)

Invention Formula The pneumatic replacement valve, comprising a housing with a single valve inside the valve, a suction and discharge nozzle with a valve, and a valve / valve connected to the valve that differs from the valve to increase the height of the liquid lift by damping the valve, the pump has a sealed container with a valve installed on the body and connected to the upper part of the latter by means of a capillary, and the valve is rigidly connected to the drain valve.