SU1506173A1 - Particle trap for pump - Google Patents

Abstract

The invention provides improved reliability of the separator and pump by improving the cleaning of the filter and the pumped liquid from solid particles. The separator contains an ejector 2 and a hydrocyclone 3 installed in front of the pump 1 and comprising a casing 4, a dividing partition 5, made in the form of a filter and having the shape of a truncated cone, and in the gap 6, decreasing along the flow path formed by the filter and the casing 4, there is a spiral direction 7, having a pitch also decreasing downstream. The fluid enters the hydrocyclone 3, twists in a screw channel formed by the guide 7. The cleaned fluid through the filter enters the pump 1 and is fed to the consumer, and the solid particles are separated under the action of centrifugal force from the liquid and discharged from the gap 6 into the receiving chamber 9 of the ejector 2, and from it into the flow of pumped liquid. Simultaneously reducing the area of the gap 6 and the pitch of the spiral guide 7 provides an increase in the velocity of the fluid with a decreasing flow rate and increasing concentration of solid particles, which leads to an increase in the efficiency of cleaning the fluid and the filter.

Description

(21) 4232945 / 25-29

(22) 04.22.87

(46) 07.09.89. Bul 33

(71) Kazakh Scientific Research Institute of Water Management

(72) M.M.Trusov, V.Ya.Reit, S.M. Dzhanaliev and L.N.Sidorov (53) 621.671 (088.8)

(56) USSR Author's Certificate No. 918542, cl. F 04 D 13/12, 1980.

USSR Author's Certificate No. 440499, cl. F 04 D 13/12, 1973.

(54) SEPARATOR OF SOLID PARTICLES OF A PUMP (57) The invention improves the reliability of the separator and the pump by improving the cleaning of the filter and the pumped liquid from solid particles. The separator contains an ejector 2 and a hydrocyclone 3 installed in front of the pump 1 and comprising a casing 4, a dividing partition 5 made in the form of a filter and having the shape of a truncated cone, and in the gap 6 decreasing along the flow,

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A filter with a casing 4 is placed in the bath by a spiral guide 7, which has a pitch that also decreases along the course of the flow. The liquid enters the hydrocyclone 3, twists in the screw channel formed by the direction of the nut 7. The purified liquid through the filter enters the pump 1 and is fed to the consumer, and the solid particles are separated under the action of centrifugal force from the liquid and removed from the gap 6 to the receiving

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chamber 9 of the ejector 2, and from it into the flow of pumped liquid. A simultaneous decrease in the area of the gap 6 and the pitch of the spiral guide 7 provides an increase in the velocity of the fluid with a decrease in its flow rate and an increasing concentration of solid particles, which leads to an increase in the efficiency of cleaning the fluid and the filter. 1 hp f-ly, 1 ill.

The invention relates to hydraulic engineering and can be used in pumping installations that pump liquid with a high content of solid particles.

The aim of the invention is to increase the reliability of the separator and pump by improving cleaning,

The drawing shows a diagram of a pumping unit with a separator of solid particles of the pump.

The separator of solid particles of the pump 1 contains an ejector 2 and a hydrocyclone 3 installed in front of the pump 1 and comprising a casing 4, an annular partition wall 5 placed in it with a gap 6 decreasing downstream, and a spiral guide 7, with the active nozzle 8 of the ejector 2 communicated with the outlet of the pump 1, and the receiving chamber 9 - with a gap 6. The casing 4, the partition 5 and the mixing chamber 10 of the ejector 2 are mounted in parallel. The partition wall 5 is made in the form of a filter having the shape of a truncated cone, the large base 11 of which is facing the pump 1, and the spiral guide 7 is installed on the outer surface 12 of the filter and is made with a pitch that is lower along the flow path.

The spiral guide 7 can be positioned with a radial clearance 13 relative to the casing 4.

The internal cavity 14 of the filter is connected to the inlet of the pump 1. The hydro-cyclone has tangential inlets 15. The pump installation may be located in the well 16 on the column of lifting pipes 17 or in a different container. The receiving chamber 9 of the ejector can be connected with a gap of 6

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by means of a pipe 18, which smoothly mates with a spiral guide 7.

The filter can be made of mesh, for example, from the net of galunnogo weaving.

The separator of solid particles works as follows.

The pumped-out fluid passes through the inlet tangential orifices 15, gets into the screw channel formed by the casing 4, the spiral guide 7 and the partition 5, and twists in this channel.

Under the action of centrifugal force, the solid particles, which have a greater density than the pumped liquid, are thrown against the wall of the casing 4 and through the radial gap 13 between the spiral guide 7 and the casing 4 are moved to the exit from the annular gap 6, from where the pipe 18 enters the receiving chamber 9. Liquid, partially cleaned from solid particles, through the filter, on which the remaining particles are finally retained, enters the inlet of pump 1. The delayed particles are washed away by the fluid flow and also enter the receiving chamber 9 o 2. The projector of liquid from the pump 1 under increased pressure into the ejector 8 active 2 sucks the previously separated solids IE receiving chamber 9 and transports them through the mixing chamber 10 and tubing string 17 to the surface.

The flow of fluid moving outside the partition wall 5, made in the form of a filter, ensures that the latter is free from sticking515

small particles. Simultaneous

reducing the area of the annular gap 6 between the casing 4 and the partition 5 and the pitch of the spiral direction 7 provides an increase in the velocity of the fluid with decreasing flow and increasing concentrations of solid particles. In this case, the combined use of the entire set of prints provides effective cleaning of the fluid and filter and increases the reliability of the separator and pump.

Claims (2)

1. A pump particulate separator containing an ejector and a hydrocyclone installed in front of the pump and including a casing, an annular partition wall placed in it with a gap decreasing downstream and the spiral nozzle, the active nozzle of the ejector communicating with the outlet of the pump, and the receiving chamber with a gap, while the casing, partition and mixing chamber of the ejector are installed coaxially, characterized in that an improved cleaning, the dividing wall is made in the form of a filter having the shape of a truncated cone with a large base facing the pump, and the spiral guide is installed on the outer surface of the filter and is made in steps that decrease along ka 2. The separator according to claim 1, about tl and - due to the fact that the spiral guide is located with a radial clearance relative to the casing.