The invention relates to a multifunctional energy-saving buffering
supercharger which solves the problem of poor water running performance of the existing device. The multifunctional energy-saving buffering
supercharger comprises a water injection
pipe connector for connecting a water injection
pipe and a
water supply pipe connector for connecting a
high pressure water supply pipe. A casing pipe or a section of a reducing pipe body with front end large and rear end small is connected between the water injection pipe connector and the
water supply pipe connector, a supercharging spring is arranged in the reducing pipe body or the casing pipe, a supercharging blocking sheet with a water through hole in the middle is assembled at the front end of the supercharging spring, and a valve block matched with the small-
diameter end of the reducing pipe body, or the rear end of the casing pipe or the end of the water supply pipe
contactor is assembled at the rear end of the supercharging spring. An annular seat in sealing match with the valve block is manufactured or arranged on the inner periphery of the small-
diameter end of the reducing pipe body or the end of the water supply pipe
contactor. The multifunctional energy-saving buffering
supercharger has the advantages that the structure is simple, the operation is convenient, water
injection pressure can be enlarged, wear of devices and
power consumption are reduced, water cannot flow back when a pump stops, low-pressure thick flow of water injection is changed into high-pressure thin flow, water can easily enter gaps of
coal seams to evenly wet
coal, and good
liquid injection effect can be achieved to the
coal seams with compact structures.