Abstract: Abstract: A hydraulic calculation method for sprinkler system in mechanical stereo garage, which is the main node pressure balance method, is proposed in view of the fact that the common drawing software can only calculate the hydraulic network of plane network, but not the three-dimensional network. According to the principle of pressure balance of main nodes, the method combines manual and software for hydraulic calculation, which is simple and easy to operate. The calculation results are verified by manual actuarial calculation of pressure balance at each node. The results show that this method can be used for accurate hydraulic calculation of sprinkler system in mechanical stereo garage. At the same time, the influence of main pipe and riser pipe arrangement on flow rate of automatic sprinkler system in mechanical garage is studied by this method, which provides reference for sprinkler system design.

Key words: Key words: mechanical stereo garage, sprinkler system, hydraulic calculation, main node pressure balance method, pipe arrangement