A kind of centrifugal pump flow regulating device and its manufacturing method

Abstract

The invention discloses a flow regulation device of a centrifugal pump. The flow regulation device comprises a flowmeter, a flow valve and a base. The base is arranged on the outer side of a water outlet pipe. The flowmeter is arranged on the water outlet pipe. The flow valve is mounted above the base and comprises an adjusting rod part and a scale box. A locating plate is arranged on the scale box and provided with a mounting hole. Scale baffles are arranged on the side face of the scale box. The adjusting rod part penetrates through the mounting hole to be fixedly mounted in the scale box. Amanufacturing method adopting the flow regulation device of the centrifugal pump comprises the following steps of 1, manufacturing of the base, 2, manufacturing of the flow valve and 3, overall assembling. Different kinds of flow can be regulated and controlled under the normal working condition of the centrifugal pump; the device can change the work point of the centrifugal pump by controlling flow; structural design is simple; damage is not prone to happening; mounting, debugging and use cost is low; no complex system connection is needed; the probability of occurrence of the leaking condition is reduced; and the regulation range is wide.

Description

technical field [0001] The invention belongs to the technical field of centrifugal pump manufacturing, and in particular relates to a centrifugal pump flow regulating device and a manufacturing method thereof. Background technique [0002] Modern industries mostly use centrifugal water pumps for high-pressure water supply, and the water pressure can reach 80-2000 meters. The main flow parts of the centrifugal pump are the water suction chamber, the impeller and the pressure water chamber. Before the centrifugal pump works, first fill the pump with liquid, and then start the centrifugal pump. The impeller rotates rapidly to drive the liquid to rotate. When the liquid rotates, it relies on inertia to flow to the outer edge of the impeller. At the same time, the impeller sucks liquid from the suction chamber. The minimum continuous flow of the centrifugal pump The flow rate refers to the minimum flow rate at which the pump can work normally without exceeding the limit of noise...

AI Technical Summary

Problems solved by technology

Before the centrifugal pump works, first fill the pump with liquid, and then start the centrifugal pump. The impeller rotates rapidly to drive the liquid to rotate. When the liquid rotates, it relies on inertia to flow to the outer edge of the impeller. At the same time, the impeller sucks liquid from the suction chamber. The minimum continuous flow of the centrifugal pump The flow rate refers to the minimum flow rate at which the pump can work normally without exceeding the limit of noise and vibration specified in the standard. When the centrifugal pump works below the minimum flow rate, the temperature of the pump body will rise, which is prone to cavitation and reduces the centrifugal pump. The service life of the pump is now generally used to set an automatic circulation valve at the outlet pipe of the pump. In actual use, it is manually opened and put into use, and it is closed during normal production.

[0003] However, in the process of production and use of the existing technology, the automatic circulation valve is usually used to regulate the minimum flow rate at the outlet of the centrifugal pump. The automatic circulation valve can only realize the return of the liquid to the pump when the outlet pipe of the centrifugal pump is upward. The horizontal direction of the water pipe does not play any role, and the automatic circulation valve can only regulate the minimum flow, and cannot limit the flow of the outlet pipe, which does not meet the flow requirements of modern technology

Images