| 摘要 |
<p>Two wheels (13, 14) are wedged onto the main pipe (10, 11) of the pipe (12) joining them. The pipe sections, (10, 11) of the main pipe each have a fixture-flange (15, 16 each with screw nuts (17) and holes (18) for fixing the coupling unit in the centre between the two pipe-sections. The coupling unit consists of a flanged pipe and sleeve. The flanged pipe has a series of outlets in for the water to pass through out of the pipe, (10, 11) into the outer sleeve-part which has annular rims on as seatings for sealing-rings. A nipple attached to the sleeve-section takes a pipe (5) with spray nozzle on. The underneath side of the sleeve-section has a nipple threaded at the bottom and screwed into a coupling-sleeve (39). The internal thread of the sleeve (39) takes a valve (43). An attachment has a long arm (45) to the bottom of which is fixed a counter-weight (47) which slides along the ground.</p> |
