The invention belongs to the technical field of
water supply equipment, and discloses non-negative-pressure horizontal
water supply equipment with a purification function. The non-negative-pressure horizontal
water supply equipment comprises a tank body, wherein a
breather valve shell is fixedly mounted at an air duct
flange at the top of the tank body, and an air
inlet valve head is fixedly connected to the top of the
breather valve shell; and an inner vent hood and an
activated carbon filter
cartridge are fixedly mounted in the
breather valve shell. A slow-release
piston, large liquid grooves and a small liquid groove jointly form a hydraulic liquid slow-release mechanism, the downward release speed of hydraulic liquid is reduced, the ascending speed of the slow-release
piston is slowed down, a push rod is limited by the slow-release
piston, and the ascending speed of the push rod is slowed down at the same time, so that the closing speed of the piston at a connecting port is reduced, the closing time is prolonged, the opening time of a ventilation channel is prolonged, the time for injecting gas inwards is prolonged, ventilation can still be performed for a period of time after the internal and
external pressure difference is lower than a threshold value, internal negative pressure is thoroughly eliminated, the negative influence of the negative pressure on the environment in the tank body is reduced to the maximum extent, and the service life of the tank body is prolonged.