Four-stage series-and-parallel connection pump

Abstract

The invention relates to a four-stage series-and-parallel connection pump. Four stages of impellers are connected in series two by two to form two series connection impeller sets. The two series connection impeller sets are symmetrically arranged on a water pump water inlet, a connection channel is formed between the two series connection impeller sets and is communicated with the water pump water inlet, a series-and-parallel connection reversing valve is arranged on the connection channel, and a one-way valve is installed between the connection channel and the water pump water inlet and used for achieving series connection and parallel connection of the four stages of impellers. According to the single pump with the four stages of impellers, through cooperation action of the series-and-parallel connection reversing valve and the one-way valve, series connection and parallel connection functions can be achieved at the same time. One pump is driven by only one motor, various purposes such as fire distinguishing, cooling and drainage can be achieved simultaneously, the structure is impact, axial force is naturally balanced, and the four-stage series-and-parallel connection pump has very good application prospects.

Description

technical field [0001] The invention relates to a water pump, in particular to a series-parallel pump water pump. Background technique [0002] At present, in order to expand the use parameter range of the water pump, it is often through the series connection of two water pumps ( figure 1 ) to achieve constant flow and double the head, or through the parallel connection of two pumps ( figure 2 ) to achieve constant head and double the flow rate, and achieve the purpose of adjusting parameters from system changes. [0003] Such as image 3 , as shown in 4, a single multi-stage water pump with symmetrically arranged impellers can be connected in series or in parallel to form a high-performance water pump through external pipelines to improve performance parameters. For example, the patent publication number CN103498797A discloses a parallel self-balancing multistage centrifugal pump. By arranging the impellers in the pump body in a back-to-back symmetrical manner, the self...

AI Technical Summary

Problems solved by technology

[0004] The present invention is to provide a four-stage series-parallel pump, which is used to solve the technical problem that two pumps or a single water pump can only realize the function of parallel connection or series connection through the external pipeline of the system, and the function is relatively single. The parallel reversing valve and the one-way valve cooperate to realize the functions of series connection and parallel connection at the same time, realizing the use of one water pump with two parameters, and becoming a multi-purpose water pump

Images