Reversible type volute pump

Abstract

The invention discloses a reversible type volute pump. The reversible type volute pump comprises a motor, a bracket, an impeller, a guide vane, a volute, a reversing valve and a support. The volute isprovided with an upper-layer cavity, a lower-layer cavity and external connectors which communicate with one another. The volute is in positioning connection with the bracket, and the impeller arranged in the upper-layer cavity and a motor output shaft are in positioning connection. The impeller with a downward suction opening is located in a guide vane inner cavity formed in the upper-layer cavity of the volute, and the lower-layer cavity located below the upper-layer cavity is in a straight pipe shape. Pipe openings in the two ends are formed in an inner cavity of the volute, and a middle section of the lower-layer cavity communicates with the suction opening of the impeller. The external connectors communicating with the lower-layer cavity and the upper-layer cavity are formed in the outer walls of the two sides of the volute. The reversing valve is arranged at the intersection of the upper-layer cavity, the lower-layer cavity and the external connectors. The reversing valve can becontrolled to control the external connectors in the two sides of the volute to be alternately opened and closed, and according to the function, the fluid output direction of the external connectorsin the two sides can be changed without downtime. Due to the fact that reversing is fast and balanced, fluctuations generated by fluid are small, noise is low, the reversible type volute pump is especially suitable for vessel matching.

Description

technical field [0001] The invention belongs to a technical solution of a fluid machine, in particular, the invention relates to a pump for conveying water, especially a reversible volute pump. Background technique [0002] In the primary and secondary industries, many supporting projects or equipment need to adjust the water level in time depending on the working conditions, and even require two-way adjustable. For example, in order to maintain the left-right balance of the hull, large and medium-sized ships generally adopt the method of adjusting the water storage capacity of the ballast tank to achieve. Today, most of the ballast tanks of large and medium-sized ships are equipped with axial flow pumps. This technical solution makes full use of the characteristics of large flow and low head of the axial flow pumps to quickly adjust the water level of the ballast tanks. Although the traditional axial flow pump is simple in structure and reliable in operation, it can reliab...

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Problems solved by technology

However, the structural disadvantages of the axial flow pump are also very obvious. First, the operation noise is large, the efficiency is low, and the floor space is large. It is not suitable for some places where the location is relatively narrow and the operation noise is limited.

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