Double-outlet multipurpose external mixing type self-priming pump with quasi-spiral suction chamber

Abstract

The invention provides a double-outlet multipurpose external mixing type self-priming pump with a quasi-spiral suction chamber. The double-outlet multipurpose external mixing type self-priming pump mainly comprises an inlet flange, a pump body, an impeller, an air-liquid separating pipe, a rear cover, a suspension body part, an outlet flange and a flange cover, wherein the pump body is formed by the quasi-spiral suction chamber, a spiral compression chamber and a liquid storage chamber through integral casting and is provided with double outlets and the like. The hydraulic performance of the pump is effectively improved while the self-priming performance of the self-priming pump is improved, the flow losses of fluid media in a suction chamber and a water compressing chamber are remarkablyreduced, and the double-outlet multipurpose external mixing type self-priming pump has the advantages of being high in efficiency and reliability, compact in structure, convenient to install and maintain and multipurpose, serving as a pipeline self-priming pump accessed horizontally only by slightly adjusting an installing mode and the like, is suitable for the fields of agricultural irrigation and drainage, river and pond breeding, municipal drainage, petrochemical metallurgy and the like and can be installed on a movable pump truck for fire-fighting operation and the like.

Description

Technical field [0001] The invention relates to the field of fluid machinery, in particular to a dual-outlet multi-purpose external mixing self-priming pump with a quasi-spiral suction chamber. Background technique [0002] The external-mixing self-priming pump is a type of self-priming pump. Because of its compact structure, convenient operation, convenient maintenance, and strong self-priming performance, it is widely used in agricultural irrigation and drainage, river pond breeding, municipal sewage, petrochemical Metallurgy, food, chemical and power plants and other fields. [0003] The traditional external mixing self-priming pump is mainly composed of impeller, pump shaft, pump body, back cover, bearing body, etc., while the suction chamber set in the pump body mostly adopts S-shaped suction elbow suction chamber, as attached figure 1 As shown, the water flow in the suction chamber undergoes two changes of 90 degrees in a short period of time, which will cause a great impact ...

AI Technical Summary

Problems solved by technology

[0003] The traditional external mixing self-priming pump is mainly composed of impeller, pump shaft, pump body, back cover, bearing body, etc., and the suction chamber set in the pump body mostly adopts S-shaped suction elbow type suction chamber, such as the attached figure 1 As shown, the water flow in the suction chamber undergoes two 90-degree direction changes in a relatively short period of time, which will cause a great impact on the pump body, and the liquid flow will be disordered, resulting in serious impact loss, low pump efficiency, and long-term start-stop. Coupled with the impact of hydraulic imbalance on one side of the water, the axial force of the impeller increases significantly, which is easy to cause damage to the bearings and sealing parts, seriously reducing the service life of the bearings and sealing parts, which is not conducive to the long-term stable operation of the pump

At the same time, the traditional external mixing self-priming pump usually only has a return hole on one side of the volute, and the impact of the return on the impeller on one side will also significantly increase the axial force of the impeller, seriously reducing the service life of the bearings and seals. , and the unilateral backflow of the liquid will destroy the uniform and symmetrical flow state in the volute, resulting in a unilateral vortex structure that changes with time in the cross section of the volute. This vortex structure is under the dynamic and static interference of the impeller and the volute It becomes more complicated, not only causes the hydraulic loss in the volute to increase, but also induces serious pressure fluctuations, causing vibration and noise of the unit

[0004] In addition, the traditional external mixing self-priming pump has only one installation method, that is, an axial inlet and a vertical upward outlet. The installation method and applicable purpose are relatively single, and cannot better meet the special needs of fire rescue and other operations.

[0005] After searching, there is no public report of double outlet multi-purpose external mixing self-priming pump with quasi-spiral suction chamber

Images