CN209856039U - Self-priming multistage pump - Google Patents

Abstract

The utility model discloses a from inhaling multistage pump includes a pump body, two impellers, a pump cover, a connection, two stator, a axle sleeve, a radical axis, a spindle nose nut and the bolt that drains. Different common self-priming pumps adopt a combination mode of two-stage impellers and guide vanes to effectively improve the pump lift. The utility model discloses can be used to carry clear water or weak acid alkalescent medium, simple structure, small, installation manufacturing are simple, can be used to fields such as chemical industry, family's water supply.

Description

Self-priming multistage pump

Technical Field

The utility model relates to a from inhaling multistage pump refers in particular to a horizontal multistage centrifugal pump with from inhaling ability, a low discharge high-lift chemical industry self priming pump of special design.

Background

Agricultural irrigation methods can be generally divided into traditional ground irrigation, general sprinkler irrigation and micro irrigation. Traditional ground irrigation comprises ridge irrigation, furrow irrigation, flood irrigation and flood irrigation, but the irrigation methods usually consume a large amount of water and have low water utilization capacity, so that the traditional ground irrigation is an unreasonable agricultural irrigation method. In addition, the common spray irrigation technology is a relatively common irrigation mode in Chinese agricultural production. But the water utilization efficiency of the common sprinkling irrigation technology is not high. The modern agricultural micro irrigation technology comprises micro-sprinkling irrigation, drip irrigation, infiltration irrigation and the like. The irrigation technologies generally have good water-saving performance and higher water utilization rate than the traditional irrigation mode. Agricultural irrigation has strong dependence on water, so an agricultural water pump also becomes one of basic agricultural equipment, but the selection of the agricultural water pump is different according to different regions, a centrifugal water pump is adopted in general agriculture, but a common centrifugal pump does not have a self-suction function, and a bottom valve needs to be additionally arranged at the bottom of a pipeline, so that capacity loss is caused, and the use of a modified pump in the field of agricultural irrigation is restricted.

The self-priming pump has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life, stronger self-priming capability and the like. The pipeline does not need to be provided with a bottom valve, and only quantitative liquid guiding is required to be ensured to be stored in the pump body before work. However, the general self-priming pump is only of a single-stage structure, and the lift is generally not high, so that the development of the pump for agricultural irrigation is restricted.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the inventor of the utility model continuously reforms and innovates through long-term exploration and trial and multiple times of experiments and efforts, and provides a self-priming multistage pump which has simple structure, small volume and simple installation and manufacture.

In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides a from inhaling multistage pump, its includes first impeller, second impeller, mechanical seal, axle sleeve, the pump body, spindle nose nut, axle, pump cover, first stator and second stator, be provided with pump inlet, pump outlet and S type room that absorbs water on the pump body, first impeller, second impeller, mechanical seal, axle sleeve, the pump body, spindle nose nut and axle constitution rotating part, first stator and second stator assembly are on rotating part, first impeller, second impeller adopt clearance fit with first stator, second stator, pump cover seal installation is on the pump body.

According to the utility model discloses in a from inhaling multistage pump, its further preferred technical scheme be first impeller and second impeller are the series connection installation, and the import orientation is unanimous, and the axle is counter-clockwise turning.

According to the utility model discloses in a from inhaling multistage pump, its further preferred technical scheme be first stator is no back of the body blade.

According to the utility model discloses in a from inhaling multistage pump, its further preferred technical scheme is axle and spindle nose nut threaded connection.

According to the utility model discloses in a from inhaling multistage pump, its further preferred technical scheme be the pump body is integrative casting structure.

According to the utility model discloses in a from inhaling multistage pump, its further preferred technical scheme is clearance between first impeller, second impeller and first stator, the second stator is 0.2mm ~ 0.5mm, and first impeller and second impeller rotate in a flexible way, no jamming.

According to the present invention, a self-priming multistage pump further preferably comprises a mechanical seal located behind the first impeller hub, leaving an effective compression amount.

According to the present invention, a self-priming multistage pump is further preferably characterized in that the shaft sleeve is located between the first impeller and the second impeller.

According to the utility model discloses in a from inhaling multistage pump, its further preferred technical scheme is still be provided with the bolt that drains on the pump body.

According to the utility model discloses in a from inhaling multistage pump, its further preferred technical scheme is the pump cover passes through bolted connection on the pump body.

The utility model has the advantages that: the self-priming pump adopting the design of back-to-back of the double impellers on the basis of the common self-priming pump has the characteristics of simple structure, small volume, simple installation and manufacture and the like, and can improve the pump lift by times.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic diagram of a self-priming multistage pump.

In the figure: 1. a pump body; 2. a bolt; 3. a pump cover; 4. a shaft; 5. an outlet of the pump; 6. a pump inlet; 7. a first guide vane; an S-shaped water suction chamber; 9. a second guide vane; 10. a spindle nose nut; 11. a connecting member; 12. a water discharging bolt; 13, shaft sleeve; 14. a first impeller; 15. a second impeller; 16. and (4) mechanically sealing.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention.

Examples

As shown in fig. 1: the utility model provides a from inhaling multistage pump, it includes first impeller 14, second impeller 15, mechanical seal 16, axle sleeve 13, the pump body 1, spindle nose nut 10, axle 4, pump cover 3, first stator 7 and second stator 9, be provided with pump inlet 6, pump outlet 5 and S type suction chamber 8 on the pump body 1, rotor is constituteed to first impeller 14, second impeller 15, mechanical seal 16, axle sleeve 13, the pump body 1, spindle nose nut 10 and axle 4, first stator 7 and the assembly of second stator 9 are on rotor, first impeller 14, second impeller 15 adopt clearance fit with first stator 7, second stator 9, 3 seal installation of pump cover is on the pump body 1.

The first impeller 14 and the second impeller 14 are installed in series, the inlet directions are consistent, the shaft 4 is set to rotate anticlockwise, and particularly, the shaft 4 is connected to a rotating part through a connecting piece 11.

The difference between the first guide vane 7 and the second guide vane 9 is that the first guide vane 7 is a blade without a back blade.

The shaft 4 and the spindle nose nut 10 are in threaded connection.

The pump body 1 is of an integrally cast structure.

The gaps between the first impeller 14 and the second impeller 15 and between the first guide vane 7 and the second guide vane 9 are 0.2 mm-0.5 mm, and the first impeller 14 and the second impeller 15 rotate flexibly without clamping stagnation.

The mechanical seal 16 is located behind the hub of the first impeller 14, leaving a significant amount of compression.

The bushing 13 is located between the first impeller 14 and the second impeller 15.

The pump body 1 is also provided with a water discharging bolt 12.

The pump cover 3 is connected to the pump body 1 through bolts 2.

During assembly, step 1, first, the first impeller 14, the second impeller 15, the mechanical seal 16, the shaft sleeve 13, the spindle nose nut 10 and the spindle 4 are assembled, and flexible rotation of the impellers is guaranteed.

Step 2, assembling the assembled part in the step 1 with a first guide vane 7 and a second guide vane 9 to ensure that the gap is between

0.2mm～0.5mm。

And 3, connecting the assembled pump cover 3 in the step 2 with the pump cover 3 by using the bolt 2, and ensuring no leakage.

The self-priming multistage pump has the following operation mode: liquid enters from the pump inlet 6, reaches the Z-shaped suction chamber 8, enters the second impeller 15, and enters the first guide vane 7 under the centrifugal force of the second impeller 15. Enters the first impeller 14 under the action of the first guide vane 7, enters the second guide vane 9 under the action of the centrifugal force of the first impeller 14, and then flows out of the pump outlet 5. Since the pump inlet 6 is located higher than the second impeller 15, the flow direction is as indicated by the arrow in fig. 1. The pump can realize self-suction and the effect of increasing the lift. The utility model discloses different common self priming pumps adopts the compound mode that the two-stage impeller adds the stator can effectively improve the pump lift. The utility model discloses can be used to carry clear water or weak acid alkalescent medium, simple structure, small, installation manufacturing are simple, can be used to fields such as chemical industry, family's water supply.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims (10)

1. The utility model provides a from inhaling multistage pump, its characterized in that includes first impeller, second impeller, mechanical seal, axle sleeve, the pump body, spindle nose nut, axle, pump cover, first stator and second stator, be provided with pump inlet, pump outlet and S type suction chamber on the pump body, first impeller, second impeller, mechanical seal, axle sleeve, the pump body, spindle nose nut and axle constitution rotating part, first stator and second stator assembly are on rotating part, first impeller, second impeller adopt clearance fit with first stator, second stator, pump cover seal installation is on the pump body.

2. A self-priming multistage pump according to claim 1, characterized in that: the first impeller and the second impeller are installed in series, the inlet directions are consistent, and the shaft rotates anticlockwise.

3. A self-priming multistage pump according to claim 1, characterized in that: the first guide vane is a backless vane.

4. A self-priming multistage pump according to claim 1, characterized in that: the shaft is in threaded connection with the spindle head nut.

5. A self-priming multistage pump according to claim 1, characterized in that: the pump body is of an integrally cast structure.

6. A self-priming multistage pump according to claim 1, characterized in that: the clearances between the first impeller and the second impeller and between the first guide vane and the second guide vane are 0.2 mm-0.5 mm, and the first impeller and the second impeller rotate flexibly without clamping stagnation.

7. A self-priming multistage pump according to claim 1, characterized in that: the mechanical seal is located behind the first impeller hub, leaving a significant amount of compression.

8. A self-priming multistage pump according to claim 1, characterized in that: the shaft sleeve is positioned between the first impeller and the second impeller.

9. A self-priming multistage pump according to claim 1, characterized in that: and a water discharging bolt is also arranged on the pump body.

10. A self-priming multistage pump according to claim 1, characterized in that: the pump cover is connected to the pump body through a bolt.