A kind of vortex-free water pump control valve

Abstract

A vortex-free water pump control valve, comprising: a valve body (1), a valve cover (2), a valve flap (3) and an opening and closing device (4); the valve body (1) is provided with a water inlet (11), a water outlet (12) and an assembly opening (13); the water inlet (11), the water outlet (12) and the assembly opening (13) are in communication with each other at an inner side of the valve body (1); the valve body (1) is provided therein with a valve seat (14); the valve cover (2) is disposed on the assembly opening (13) of the valve body (1) and is provided with a skirt sleeve (21); the valve flap (3) is movably disposed at an inner side of the skirt sleeve (21) of the valve cover (2), and the valve flap (3) is arranged so as to be in transmission connection with the opening and closing device (4); the valve flap (3) is provided thereon with a groove (36) and a 3-15 block copper-zinc alloy guiding block (37) which extends in the axial direction; an inner side wall of the skirt sleeve (21) is plasma-sprayed with a chromium oxide ceramic coating having a thickness of 0.1-0.6 mm; an angle between the axial center line between the water inlet (11) and the water outlet (12) as well as the axial center line of the valve cover (2) is 65±3°; and the opening and closing device (4) is fixed on the valve cover (2).

Description

technical field [0001] The invention relates to a vortex-free water pump control valve, which belongs to the technical field of water supply and drainage system pipe network equipment. Background technique [0002] The use of centrifugal pumps in water supply and drainage systems is one of the common methods. Combined with the working characteristics of centrifugal water pumps, it is generally necessary to set a pump control valve at the water outlet of the pump to cooperate with the work of centrifugal water pumps to prevent the water supply pipe network from Cause water hammer impact or prevent reverse rotation of centrifugal water pump. For example, the Chinese patent ZL201210005166.3 announced on September 2, 2015 discloses a pneumatic energy-saving piston balanced water pump control valve, which includes a valve body, a lower gland, a lower sealing ring, a lower valve seat, a valve cover, a valve The valve shaft and the device for controlling the axial telescopic movem...

AI Technical Summary

Problems solved by technology

The water pump control valve can solve the problems of water hammer and centrifugal water pump reversal, but when the impurity content of the fluid conveyed in the pipeline is high or the pipeline has not been used for a long time, the water pump control valve is affected by sediment deposits and components. Due to the influence of rust, the opening and closing of the valve clack is stuck or blocked. This is a relatively common technical problem encountered by water pump control valves at present.

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