Washing apparatus for filter press

A washing apparatus for a filter press wherein when the filter plates are transferred one by one toward a movable end plate, a washing liquid spray pipe having a number of nozzles is positioned between the filter plates which are being successively separated as a result of the transfer and filter sheets each spread over adjacent filter plates or the filter surfaces with such filter sheets removed therefrom are washed by the spray pipe moving between adjacent filter plates, said washing apparatus comprising the following features:

• a. the spray pipe is disposed outside of the filter plates so as to be parallel to one side of the filter plate and its one end opposed to a corner of the filter plate is pivotally mounted in a movable unit which is movable parallelly to the filter plates,
• b. said movable unit is supported by a carriage movable in the direction of movement of the filter plates and is disposed, along with the movable unit, so as to move on said one side of the filter plates to which the spray pipe is installed parallelly and outside the filter plates,
• c. means is provided for intermittently moving the carriage to position the spray pipe between separated filter plates in synchronism with the transfer of the filter plates one by one toward the movable end plate,
• d. means is provided for forwardly and backwardly moving the movable unit in synchronism with the positioning of the spray pipe between separated filter plates by the carriage followed by the stoppage of the latter at that position, and
• e. means is provided for forwardly turning the spray pipe to a position where it is parallel to an adjacent side of the filter plate which is at right angles with the firstmentioned side thereof to which the spray pipe is installed parallelly and for backwardly turning it to its initial position, in synchronism with the initial stage of the forward movement and the final stage of the backward movement of the movable unit.