SU922318A1 - Bucket pump for pumping agressive media - Google Patents

Description

(5) CHAIR PUMP FOR TRANSFERING AGGRESSIVE MEDIA

I

The invention relates to pump engineering and can be used in scoop pumps used in systems pumping corrosive media.

Known bucket pump for pumping corrosive media, containing a casing with an inlet pipe, mounted in the casing rotating body, in which a fixed scoop is located, and placed between the inlet pipe and casing, Ll 1 The disadvantage of the known pump is low reliability due to only one seals for protection against aggressive media.

The purpose of the invention is to increase reliability.

This goal is achieved by the fact that the pump is provided with an additional seal made in the form of a guide element with blades and a grooved screen fixed respectively on the housing and the casing, the screen having a groove of variable depth smoothly increasing in the direction of rotation of the housing and a visor restricting it zone of maximum depth and facing the opposite direction of the body.

ten

FIG. 1 shows a scoop pump; longitudinal section; nafig.2globoobrazny screen; in fig. 3 is a section A-A in FIG. 2; in fig. node 1 in FIG. t (paddle guide); in fig. 5 is a view B in FIG. .

A scoop pump for pumping corrosive media contains a casing 1 with an inlet pipe 2, installed in the casing 1 a rotating body 3 in which there is a fixed scoop k placed between the inlet pipe 2 and the casing 3

5, the pump being provided with an additional seal made in the form of a guide element 6 with blades 7 and a trough-shaped screen 8 fixed respectively on the body 3 and the casing 1, the screen 8 having a groove 9 of variable depth, gradually increasing in the direction of rotation of the body 3i and the visor 10 limiting it in the zone of maximum depth and facing in the direction opposite to the rotation of the body 3.

The bucket pump for pumping corrosive media works in the following manner.

As the housing 3 rotates, the fluid through the inlet 2 enters the rotating housing 3, is captured by the scoop k and ejected from the pump.

In this case, leaks of the pumped corrosive medium through the mechanical seal 5 due to the centrifugal force that occurs when the body 3 rotates, fall on the guide element 6 and its annular groove screen 8 is thrown off by the blades 7 8, twisted in it by air flow and directed into the groove 9. Due to the fact that the groove 9 is made of variable depth, gradually increasing in the directions of rotation of the housing 3, the leaks move in the same direction. Leakage movement is limited to a visor 10, due to

in addition, they are assembled in the groove 9 and discharged from the pump.

Such an implementation of a scoop pump for pumping aggressive media allows to prevent the leakage of the protective equipment into the casing and to reliably protect its elements from the harmful effects of the pumped aggressive medium.

Claims (1)

1 .. USSR author's certificate tf 688700, class F Ok D 1/12, 1978. FIG.} g LA eight hr FIG. 2 Fig.Z FIG. four Type B