Flush valve and pump station comprising such a flush valve

Abstract

In a fist aspect the invention relates to a flush valve comprising an inlet (13), an outlet (14) and a valve arrangement (15), wherein the valve arrangement (15) comprises a first chamber (17), a second chamber (18) that is partly delimited by a diaphragm (21), and a conduit (19) extending between and connecting the first chamber (17) and the second chamber (18), a third chamber (22) that connectsthe inlet (13) and the outlet (14) of the flush valve (12) and that is partly delimited by said diaphragm (21), the third chamber (22) comprising a valve member (23) configured to control a fluid flow from the inlet (13) to the outlet (14) based on the position of said diaphragm (21), and a control mechanism arranged in said conduit (19). The flush valve is characterized in that the control mechanism comprises a stepper (25) and a plunger (26), the plunger (26) being biased towards an inactive position and being displaced towards an active position by means of the second pressure [P2] in thesecond chamber (18) when said second pressure [P2] in the second chamber (18) is greater than a threshold value [PT], the plunger (26) being configured to engage the stepper (25) when the plunger (26), wherein the stepper (25), each time the plunger (26) engages the stepper (25), changes position once in a repeated set of positions and wherein the stepper (25) in at least one position enables fluid communication between the first chamber (17) and the second chamber (18) via said conduit (19). In a second aspect the invention also relates to a pump station comprising such a flush valve.

Description

technical field [0001] The present invention relates generally to the technical field of devices for preventing the accumulation of solid matter in pumping stations, and in particular to the technical field of devices for automatically mixing / circulating the contents of pumping stations. [0002] According to a first aspect, the invention relates to a flush valve arranged in connection with a pump located in a reservoir containing liquid. According to a second aspect, the invention relates to a pumping station comprising: a reservoir arranged to contain a liquid; a pump located in said reservoir; and a flushing valve connected to the pump . The pump station is arranged to hold liquids including solid matter, organic matter as well as inorganic matter such as sewage / wastewater. [0003] The flush valve includes an inlet disposed in fluid communication with the volute of the pump, an outlet disposed into the reservoir, and valve means configured to open and close the flush val...

AI Technical Summary

Problems solved by technology

When there is no mixing, the accumulation of solid matter and grease will inevitably occur in the pumping station, which means many problems, such as bad smell, danger of explosion, corrosion problems, etc.

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