CN219711805U - Semi-open centrifugal impeller pump for conveying solid-liquid two-phase mixture - Google Patents

Abstract

The utility model discloses a semi-open centrifugal impeller pump for conveying a solid-liquid two-phase mixture, which comprises a pump shell and impellers rotatably arranged in an inner cavity of the pump shell, wherein the impellers comprise an upper impeller and a lower impeller which are coaxially arranged, a solid material feed inlet corresponding to the upper impeller and a liquid medium feed inlet corresponding to the lower impeller are formed in the pump shell, a solid-liquid mixing cavity is formed between the upper impeller and the pump shell, a fluid entrainment cavity is formed between the lower impeller and a pump body, the solid-liquid mixing cavity is communicated with the fluid entrainment cavity, a mixed material discharge outlet is formed in the pump shell corresponding to the fluid entrainment cavity, materials in the solid-liquid mixing cavity enter the fluid entrainment cavity through dead weight and fluid entrainment effect and are discharged out of the pump shell after being subjected to secondary solid-liquid mixing, the solid-liquid two phases can be mixed in the pump cavity, and the mixed solid-liquid mixture can be discharged out of the pump cavity.

Description

Semi-open centrifugal impeller pump for conveying solid-liquid two-phase mixture

Technical Field

The utility model belongs to the field of conveying pumps, and particularly relates to a semi-open centrifugal impeller pump for conveying a solid-liquid two-phase mixture.

Background

When pumping a solid-liquid two-phase mixture, it is generally required that solid particles and liquid are mixed before entering the pump to form a solid-liquid two-phase mixture, and after entering the pump, the energy is increased under the drive of an impeller and then discharged out of the pump. A general solid-liquid two-phase flow pump is provided with an inlet, a solid-liquid mixture mixed in advance enters the pump from the inlet, and then the solid-liquid two-phase mixture with increased energy is discharged outside a pump cavity by contacting the impeller blades with the mixture.

The mixing process of the solid phase and the liquid phase is positioned outside the pump cavity, and the materials entering the pump cavity are solid-liquid mixed materials. The pump structure for mixing the solid and liquid materials in the pump cavity is not available, so the technical problem is solved by the scheme, and the semi-open centrifugal impeller pump capable of mixing and conveying the solid and liquid materials in the pump cavity is provided.

Disclosure of Invention

The utility model aims to: in order to overcome the defects in the prior art, the utility model provides a semi-open centrifugal impeller pump for conveying a solid-liquid two-phase mixture, which can mix the solid and liquid two phases in a pump cavity and discharge the mixed solid-liquid mixture out of the pump cavity.

The technical scheme is as follows: in order to achieve the above purpose, the technical scheme of the utility model is as follows:

the semi-open centrifugal impeller pump for conveying the solid-liquid two-phase mixture comprises a pump shell and an impeller rotationally arranged in an inner cavity of the pump shell, wherein the impeller comprises an upper impeller and a lower impeller which are coaxially arranged, a solid material feed inlet corresponding to the upper impeller and a liquid medium feed inlet corresponding to the lower impeller are formed in the pump shell, a solid-liquid mixing cavity is formed between the upper impeller and the pump shell, a fluid entrainment cavity is formed between the lower impeller and the pump body, the solid-liquid mixing cavity is communicated with the fluid entrainment cavity, a mixed material outlet is formed in the pump shell corresponding to the fluid entrainment cavity, and materials in the solid-liquid mixing cavity enter the fluid entrainment cavity through self weight and fluid entrainment effect to be discharged out of the pump shell after secondary solid-liquid mixing.

Further, the rotation outer diameter of the upper layer impeller is smaller than that of the lower layer impeller, and in the rotation radial direction, the solid-liquid mixing cavity is positioned between the fluid entrainment cavity and the liquid medium inlet.

Further, the outer diameter of the upper impeller is 75% -85% of the outer diameter of the lower impeller.

Further, the liquid medium inlet is arranged corresponding to the rotation center area of the lower impeller.

Further, a communication port corresponding to the liquid medium inlet is formed in the end plate of the lower impeller; the liquid medium enters the channels between the vanes of the lower impeller through the communication ports.

Further, the solid material feed inlet is arranged corresponding to the rotation center area of the upper impeller.

Further, the upper layer impeller and the lower layer impeller are of semi-open impeller structures, and the opening directions of the upper layer impeller and the lower layer impeller are the same and face the solid material feeding port.

Further, the mixed material outlet is arranged on the radial wall body of the pump shell.

The beneficial effects are that: according to the utility model, the solid material and the liquid medium are respectively discharged into the pump shell, the solid and liquid two-phase materials are mixed in the pump cavity through the upper impeller and the lower impeller, and compared with the traditional mode, the traditional mode of mixing the solid and liquid two phases outside the pump cavity is converted into the mode of mixing the solid and liquid two phases in the pump cavity, so that the integral structure and the component composition of the solid and liquid two-phase transmission system can be reduced, and the functionality of the transmission pump can be increased.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

fig. 2 is an axial schematic view of the impeller structure of the present utility model.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, a semi-open centrifugal impeller pump for conveying a solid-liquid two-phase mixture comprises a pump shell 1 with a pump cavity and an impeller 2 rotatably arranged in the inner cavity of the pump shell 1, wherein the impeller 2 comprises an upper impeller 3 and a lower impeller 4 which are coaxially arranged, a solid material feed inlet 11 corresponding to the upper impeller and a liquid medium feed inlet 12 corresponding to the lower impeller are arranged on the pump shell 1, the solid material feed inlet 11 is arranged at the top of the pump shell 1, the liquid medium feed inlet 12 is arranged at the bottom of the pump shell 1, a solid-liquid mixing cavity 5 is formed between the upper impeller and the pump shell, an annular solid-liquid mixing cavity is formed between the outer diameter of the upper impeller 3 and the peripheral wall of the pump shell at intervals, and is mainly positioned in the outer diameter area of the upper impeller, and when a liquid medium on the lower layer is filled in the pump cavity, the liquid medium can flow into the area of the upper impeller 3 and be primarily mixed with the solid material on the upper impeller 3. The pump comprises a pump body, a pump shell, a pump body, a pump cavity, a solid-liquid mixing cavity, a pump cavity, a mixing material discharge port 13, a solid-liquid mixing cavity 5, a pump cavity and a clamping belt, wherein a fluid entrainment cavity 6 is formed between the lower impeller and the pump body, an annular fluid entrainment cavity is formed between the outer diameter of the lower impeller 4 and the peripheral wall of the pump shell at intervals, the annular fluid entrainment cavity is mainly located in the outer diameter area of the lower impeller, the solid-liquid mixing cavity is communicated with the fluid entrainment cavity, the fluid entrainment cavity is located below the solid-liquid mixing cavity, the pump shell is provided with the mixing material discharge port 13 corresponding to the fluid entrainment cavity, and when a liquid medium flows from the pump cavity to the mixing material discharge port 13, negative pressure is generated relative to the solid-liquid mixing cavity 5 above, so that a solid-liquid mixture above the clamping belt is discharged from the mixing material discharge port, and materials in the solid-liquid mixing cavity enter the fluid entrainment cavity through dead weight and fluid entrainment effect, and are discharged outside the pump shell.

The specific working mode and principle are as follows: wherein the inlet positioned below is a pure liquid medium inlet, and the inlet positioned above is a pure solid particle inlet. Before the pump is started, the pump cavity is filled with liquid. After the pump is started, the upper layer solid particle releasing or filling device is started, solid particles enter a channel between the upper layer impeller and the pump shell and are mixed with liquid to form a solid-liquid two-phase mixture, and the solid-liquid two-phase mixture moves outwards to enter the solid-liquid mixing cavity 5 under the driving of the upper layer impeller. The lower impeller rotates at the same rotation speed, the medium passing through the lower impeller is liquid entering from the inlet at the lower part, and when the liquid medium flows from the pump cavity to the mixture outlet 13, the liquid medium generates negative pressure relative to the solid-liquid mixing cavity 5 at the upper part, so that the solid-liquid mixture at the upper part of the clamping belt is discharged from the mixture outlet.

The rotation outer diameter of the upper impeller 3 is smaller than that of the lower impeller 4, and in the rotation radial direction, the solid-liquid mixing cavity 5 is positioned between the fluid entrainment cavity 6 and the liquid medium inlet 12. The outer diameter of the upper impeller is 75% -85% of the outer diameter of the lower impeller, the materials in the solid-liquid mixing cavity are primarily mixed, the primarily mixed materials firstly enter between blade channels of the lower impeller body blades 41 of the lower impeller under the action of gravity and negative pressure, then enter the fluid entrainment cavity for secondary mixing, and due to the larger outer diameter of the lower impeller and higher lift, the speed difference exists between the liquid discharged from the impeller and the solid-liquid two-phase mixture discharged from the upper layer; therefore, the lower layer liquid has an entraining effect on the upper layer solid-liquid two-phase mixture, so that the mixed two-phase medium is discharged out of the pump together, and the solid-liquid two-phase is fully mixed.

And the pump shell 1 is of a boss-shaped shell structure with a small upper part and a large lower part, so that a certain distance exists between the solid-liquid mixing cavity 5 and the fluid entrainment cavity 6 in the radial direction, and the solid-liquid mixing cavity and the fluid entrainment cavity are communicated through vane passages of the lower-layer impeller.

Wherein, the liquid medium inlet 12 is arranged corresponding to the rotation center area of the lower impeller 4. The solid material inlet 11 is arranged corresponding to the rotation center area of the upper impeller 3. So that both solid and liquid phases move from the center to the outer diameter direction to be gradually mixed.

The upper impeller 3 and the lower impeller 4 are of semi-open impeller structures, and the opening directions of the upper impeller and the lower impeller are the same and face the solid material feed inlet 11, so that the upper impeller and the lower impeller can be communicated and mixed.

The upper impeller 3 comprises a first end plate 3a and a plurality of upper impellers 31 which are arranged on the upper end surface of the first end plate 3a in a circumferential array, the lower impeller 4 comprises a second end plate 4a and a plurality of lower impellers 41 which are arranged on the upper end surface of the second end plate 4a in a circumferential array, the first end plate is connected with the rotating shaft 10, and the first end plate is connected with the lower impellers 41.

The end plate of the lower impeller 4 is provided with a communication port 14 corresponding to the liquid inlet 12 of the liquid medium, namely the communication port 14 is arranged on the second end plate, and is used for the passage of the liquid medium between the blades of the lower impeller through the communication port.

The mixed material outlet 13 is formed on a radial wall of the pump casing 1, so that the mixed material is discharged from the radial mixed material outlet 13 under the centrifugal action of the impeller and has larger kinetic energy.

The foregoing is only a preferred embodiment of the utility model, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims (7)

1. A semi-open centrifugal impeller pump for conveying a solid-liquid two-phase mixture, which is characterized in that: the pump comprises a pump shell (1) and an impeller (2) rotatably arranged in an inner cavity of the pump shell (1), wherein the impeller (2) comprises an upper impeller (3) and a lower impeller (4) which are coaxially arranged, a solid material feed inlet (11) corresponding to the upper impeller and a liquid medium feed inlet (12) corresponding to the lower impeller are formed in the pump shell (1), a solid-liquid mixing cavity (5) is formed between the upper impeller and the pump shell, a fluid entrainment cavity (6) is formed between the lower impeller and the pump body, the solid-liquid mixing cavity is communicated with the fluid entrainment cavity, a mixed material discharge outlet (13) is formed in the pump shell corresponding to the fluid entrainment cavity, and materials in the solid-liquid mixing cavity enter the fluid entrainment cavity through self weight and fluid entrainment effect to be subjected to secondary solid-liquid mixing and then are discharged out of the pump shell;

the rotation outer diameter of the upper impeller (3) is smaller than that of the lower impeller (4), and in the rotation radial direction, the solid-liquid mixing cavity (5) is positioned between the fluid entrainment cavity (6) and the liquid medium inlet (12).

2. A semi-open centrifugal impeller pump for the delivery of a two-phase solid-liquid mixture according to claim 1, characterized in that: the outer diameter of the upper impeller is 75% -85% of that of the lower impeller.

3. A semi-open centrifugal impeller pump for the delivery of a two-phase solid-liquid mixture according to claim 1, characterized in that: the liquid medium inlet (12) is arranged corresponding to the rotation center area of the lower impeller (4).

4. A semi-open centrifugal impeller pump for the delivery of a two-phase solid-liquid mixture according to claim 3, characterized in that: a communication port (14) corresponding to the liquid medium inlet (12) is formed in the end plate of the lower impeller (4); the liquid medium enters the channels between the vanes of the lower impeller through the communication ports.

5. A semi-open centrifugal impeller pump for the delivery of a two-phase solid-liquid mixture according to claim 1, characterized in that: the solid material feeding hole (11) is arranged corresponding to the rotation center area of the upper impeller (3).

6. A semi-open centrifugal impeller pump for the delivery of a two-phase solid-liquid mixture according to claim 1, characterized in that: the upper-layer impeller (3) and the lower-layer impeller (4) are of semi-open impeller structures, and the opening directions of the upper-layer impeller and the lower-layer impeller are the same and face the solid material feed inlet (11).

7. A semi-open centrifugal impeller pump for the delivery of a two-phase solid-liquid mixture according to claim 1, characterized in that: the mixed material outlet (13) is arranged on the radial wall body of the pump shell (1).