SU1551839A1 - Jet pump - Google Patents

Abstract

The invention relates to pump engineering and can be used to pump easily damaging products. The purpose of the invention is to simplify the design and expand the functionality of a pump with an adjustable mode of operation. In the guide 3 of the housing 1 with the lateral branch pipe (P) 2 for supplying the active medium with the possibility of axial movement, the displacement chamber 4 is installed. A diffuser 5 and a confuser 6, adjacent to the chamber 4 and forming a passive medium supplying a passive medium with a central channel 8 having a central channel 8, have an active nozzle 9. The outer thread is made on the guide 2 and interacts with the nut 11. The chamber 12 has an inlet П 13 with a locking element and is positioned coaxially with П 7. In П 7 there is an annular peripheral channel 15 communicated with the chamber 12. Adjusting the width of the nozzle 9 and moving by the guide 2 of the chamber 4 is produced by rotating the nut 11. 1 s. f-ly. 2 Il.

Description

The invention relates to pump construction, to the design of an ejector pump with an adjustable mode of operation, and may in particular be used for pumping easily-damaging products, such as live or commercial fish, etc.

The purpose of the invention is to simplify the design and expand the functionality by providing pumping of easily damaging products.

FIG. 1 shows a jet pump, a longitudinal section; in fig. 2 - jet pump as part of a pump irrigation installation, general view.

The jet pump comprises a housing 1 with a lateral branch pipe 2 for supplying the active medium and a guide 3, in which the displacement chamber 4 is mounted with the possibility of axial movement, with a diffuser 5 adjacent to it and a confusor 6 forming a passive medium with a conical branch pipe 7 channel 8, active nozzle 9, and a device for adjusting the mode of operation, made in the form of a ring 10 fixed to the mixing chamber 4 and covering the ring 10 of the nut 11. A male thread is made on the guide, interacting with the nut oh 11. The pump can be equipped with a chamber 12, having a supply nozzle 13 with a locking element 14 (Fig. 2) and located coaxially to the conical nozzle 7, and in the latter there is an additional annular peripheral channel 15 communicated with the chamber 12. Pumping , which includes a jet pump, includes a main pump 16, a strainer 17, which ensures the retention of fish fry and litter, a pipeline 18 for draining fish and litter from the filter 17, a discharge pipe 19 of the main pump, a pipeline 20 through

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giving an active medium (water) into the housing 1 of the jet pump through the side nozzle 2 (Fig. 2). For the convenience of adjusting the operating mode of the pump, the ike 11 is provided with handles 21 and is made of two parts connected by screws 22 (Fig. 1).

Jet pump works as follows.

When the main pump 16 runs, the water coming out of it moves in two directions: through conduit 19 to the irrigation network of fields and conduit 20 to the jet pump. The filter 17 retains the small litter and the fish, thereby preventing the fish from entering the pump 16 and its death. The fish is led out of the cavity of the filter 17 into the pond through line 18, the flow of which is maintained by a jet pump.

The active medium (water) entering the cavity of the pump body 1 flows out of the nozzle 9 at a speed of 12-16 m / s. At the same time, on sections of the channel 8 and the nozzle 7, a reduced pressure is constantly maintained, under the action of which water with fish and litter continuously flows through the channel 8 from the cavity of the filter 17 and into the annular channel 15 from the chamber 12, where it is sucked through pipe 13. All three streams are mixed together in the mixing chamber 4 and exchange energy. From the mixing chamber 4, the total flow, which has a certain amount of energy, enters the diffuser 5, and then into the pipeline 18.

The flow of water entering the mixing chamber 4 through the annular channel 15 plays the role of a buffer flow, since the annular stream of water flowing out of the nozzle 9, before entering the stream containing the fish, mixes with it substantially (1.3-2.0 times) loses its initial speed and how

consequence, has a less traumatic effect on the fish.

The locking body 14 can establish such a flow of water in the nozzle 13, at which the flow rate of water mixed directly with the water-fish flow is within the allowable values for this or that fish species.

The adjustment of the operating mode of the jet pump in order to establish a regime with maximum efficiency is made by changing the width of the nozzle 9 as the nut 11 is rotated to one side or the other. As the nut rotates, the nut moves up or down relative to the guide 3 and moves together with it the mixing chamber 4 rigidly connected with the confuser 6.

Claims (2)

Claims 1. Inkjet pump containing core five a mixing chamber with adjacent diffuser and confuser is installed, which forms a active nozzle and a device for adjusting the operating mode with a conical connection pipe for supplying the passive medium, which, in order to simplify the design, the device for adjusting the operating mode is a ring rigidly fixed on the mixing chamber, and a nut enclosing the ring, and an external thread is made on the guide, interacting with a nut. 2. A pump according to claim 2, in order to expand the functionality by means of 0-providing pumping of easily damaging products, it is equipped with a chamber having a supply pipe with a locking element and located coaxially to the conical port, the empty side with the active-25a side inlet pipe in the latter is made of an additional medium and a guide, in which the annular peripheral channel is axially displaced with the camera.