Manual hydraulic pump activated by compressed air for emptying wells or bores

摘要

The pump has a purge device having a spherical or cylindrical piece inside it, this piece being disengaged from either the lower position or the upper part on arrival of the purge air through the pipe. The device comprises a manual hydraulic pump (6) and a tank (1) in communication with bore water through a non-return valve (2). A discharge pipe (3) fitted with a non-return valve at its bottom passes through the tank upper wall. A pipe (5) also passing through the tank upper wall is connected to the pump through a device (10) for purging the air contained in the tank. The purge device is closed by an upper wall having an opening (13) and closed in its lower part by a wall through which a pipe (4) supplied with compressed air discharges. A spherical or cylindrical piece slides inside the purge device to occupy either the lower position (11) or the upper part (12). This piece is disengaged from each of these positions on the arrival of the purge air through the pipe (5).