The spraying experimentations were carried in orchard by using constant pressure controller.

采用恒压控器在果园进行了喷洒实验。

Using constant pressure controlling, stability of liquids pressure in the pipeline could be guarantee and pipeline bursting could be prevented at the same time.

采用恒压控，保管道液体压定性，同时防止管道爆裂。

Adopting constant pressure control devices can improve the stability of liquid pressure in pipeline, reduce the liquid pressure fluctuation which caused by the changing of spraying nozzles number.

采用恒压控装置能提升管道液体压定性，减少因喷头数量变化引起液体压波动。

Experimental result indicated that, using the constant pressure control device, the control error was 0.0167Mpa, the pressure control stability was 98.33%, the downtime to prevent pipeline bursting was 8.04s and the downtime after pipeline burst accidently was 8.88s.

实验结果表明，采用恒压控装置时，控误差为0.0167Mpa，压控定性达到98.33%，预防管道爆裂停机时间为8.04秒，管道意外爆裂后停机时间为8.88秒。