RU1789759C - Pump unit - Google Patents

Abstract

Usage: pumping aqueous and chemical suspensions with mechanical abrasive particles. SUMMARY OF THE INVENTION: inlet 4 and outlet 5, pipelines (T) are in communication with additional inlet 10 and outlet 11 through tangential rectangular channels 12. Bypass channel 8 is in communication with central branch pipe 15 of outlet T 11. Central branch pipe 17 inlet of the supply T 4 is connected with the cavity of the additional T 10. When an inhomogeneous medium passes through the tangential channels 12 in the supply T 4, there is a flow swirl and separation of abrasive particles into the separation gap 7 and the bypass channel 8. When swirling in the pressure flow mode at T 11, a reduced pressure along the forming center sucks the pulp from the bypass channel 8 through the pipe 15, thereby protecting the flow part of the pump 1 from wear. 2 s.p. crystals, 4 ill., 1 tab. Ј

Description

The invention relates to the hydrotransport of abrasive slurries by pumping units and can be used in processing plants, in hydraulic engineering, construction, chemical and other industries.

A centrifugal pump for pumping abrasive liquids is known, comprising an open impeller and a suction pipe with an annular separation groove in communication with a pipe for removing the separated particles.

This pump is not designed to transport abrasive slurry.

Also known is a submersible pump-based borehole pump installation comprising a vortex chamber on a suction nozzle for separating abrasive particles, an annular abrasive particle collection section, a hydraulic elevator on a discharge nozzle.

The disadvantages of the known pump installation are low operational reliability, rapid wear and large losses in the hydraulic elevator.

An object of the invention is to increase the durability and reliability of a pumping unit by improving the separation of abrasive particles.

This goal is achieved in that a pump installation comprising a pump with suction and pressure nozzles, inlet and outlet pipelines, the first of which is mounted on the suction nozzle with the formation of a separation gap in communication with the bypass channel, and the second is fixed to the pressure head pipe, and bypass pipe in communication with the Central part of the inlet

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the pipeline is equipped with additional inlet and outlet pipelines in communication with the main inlet and outlet pipelines through tangential rectangular channels, one end of the main and additional pipelines made blind, while the bypass channel is in communication with the central end part of the additional outlet pipe and the bypass pipe is in communication with the cavity of the additional supply pipe.

When the pump is running, the liquid with abrasive particles is twisted in the main supply and additional discharge pipes, the separated abrasive particles are captured in the collection area and bypass channel enter the low pressure zone in the central part of the additional discharge pipe, min flow pump path. To prevent flow disruption at the pump inlet, the central part of the main supply pipe is connected to the cavity of the auxiliary supply pipe by the bypass pipe.

The table shows the results of testing the suction capacity of a swirl flow through a tangential rectangular channel in the pressure pipe with the following data:

the diameters of the main outlet and secondary outlet pressure pipelines are 50 mm;

the height of the tangential channel is 10 mm (the ratio of the height of the channel to the diameter is 1/5);

tangential channel length 200 mm;

diameter of the suction pipe 15 mm;

the cross-sectional area of the channel and pipeline is 0.002 m2.

The test results show that the reduced pressure in the center of the additional outlet pipe has sufficient suction capacity.

Figure 1 shows a schematic illustration of a pumping unit; Figures 2-4 are, respectively, sections AA, BB, BB in Figure 1.

The pump installation includes a pump 1 with a suction 2 and pressure head 3 pipes, supply 4 and discharge 5 main pipelines. The supply pipe 4 is installed on the suction pipe 6 of the pump 1 with the formation of the separation gap 7, communicated with the bypass channel 8 by means of a spiral outlet 9, and the discharge pipe 5 is fixed to the discharge

branch pipe 3. Inlet 4 and outlet 5 main pipelines are equipped with additional inlet 10 and outlet 11 pipelines in communication with the latter through tangential

rectangular channels 12, while the end 13 of the additional supply pipe 10 and the end 14 of the main discharge pipe 5 are blind, and the bypass channel 8 is in communication with the central end part of the additional discharge pipe 11 through the pipe 15. Bypass pipe 16 in communication with the central the end part of the supply main pipe 4 by means of a pipe 17 is connected to the cavity of the additional supply pipe 10.

The pump installation operates as follows.

as a pulp-like liquid with abrasive particles passes through tangential rectangular channels 12 in the supply pipe 4 therein, as well as in the discharge pipe 11, flow swirls under the action of centrifugal forces. In the supply pipe 4, the abrasive particles are separated to the separation gap 7 and the latter is withdrawn by means of a spiral outlet 9 (made in the swirling direction) into the bypass channel 8. In the discharge pipe 11 a swirl is also formed, but in the pressure mode, which leads to the formation of the central part of the discharge pipe 11 of the zone of reduced pressure, into which the thickened pulp of abrasive particles from the bypass channel 8 flows through the pipe 15. Thus, the hydrotransport of inhomogeneous FIR media containing abrasive particles, wherein the mine flow of the pump, which contributes durability and operational reliability of the pump, as the impeller and flow of the pump body will work in more favorable conditions from the viewpoint of abrasion pump cavitation-erosion.

The application of the proposed pump installation ensures the transport of separated particles along the bypass line, preventing intensive hydro-cavitation-abrasive wear of the working blades and the flow part of the pump, and increases the operational reliability of the pump.

Claims (2)

1. A pump installation comprising a pump with suction and pressure pipes, inlet and outlet pipes, the first of which is installed on the suction pipe with the formation of a separation gap in communication with the bypass channel, and the second is fixed to the pressure pipe, and the bypass pipe, communicated with a central part of the inlet pipe, characterized in that, in order to increase durability and reliability by improving the separation of abrasive particles, the installation is equipped with additional inlet and outlet pipes by wires connected to the main inlet and outlet pipelines by means of tangential rectangular channels, one end of the main and additional pipelines made blind, while the bypass channel is in communication with the central end part of the additional outlet pipeline, the bypass pipeline is in communication with the cavity of the additional inlet the pipeline. 2. Installation according to claim 1, with the exception that the rectangular channels are made with a height equal to 1/5 of the pipelines connected by them and with cross-sectional areas equal to the cross-sectional areas of these pipelines . 5-5 V 4 P Fie. 2 Fie.Z Fig 4