METHOD FOR PREVENTING AQUATIC ORGANISM FROM STICKING

摘要

PURPOSE:To effectively prevent aquatic organism from sticking on a device body such as a heat exchanger or the like used with seawater (river water) by using an ultraviolet lamp provided with an external cylinder which prevents to contact the liquid source of an ultraviolet lamp with seawater and allows ultraviolet rays to pass therethrough and provided with a mechanism for cleaning the surface of the external cylinder. CONSTITUTION:Both an ultraviolet lamp main body 1 and the cap 3 thereof are incorporated in the external cylinder 2 of the ultraviolet lamp and fitted to a lamp base 5. The external cylinder 2 is generally made of quartz glass and fluidized water is prevented from infiltrating thereinto by means of a sealing member 6 of the external cylinder of the lamp. The handgrip 7 of a cleaning brush is joined to a collar 13 for rotating the brush and the collar 13 is joined to a handle 9 via gears 12, 10. In other words, when rotating the handle 9, its movement is conducted to the handgrip 7 and a cleaning material 8 fitted to the handgrip 7 is moved around the outer circumference of the external cylinder 2. Thereby soil or the like are prevented from being stuck on the external cylinder 2 and illuminance of the ultraviolet lamp can be always maintained at high value.