Ultraviolet sterilizer having vibration-proof function

An ultraviolet sterilizer having a vibration-proof function, comprising:

• an ultraviolet sterilization unit comprising:
• an inlet through which ballast water is drawn thereinto;
• an outlet through which the ballast water is discharged therefrom after the ballast water has been sterilized;
• an ultraviolet lamp located between the inlet and the outlet, the ultraviolet lamp applying ultraviolet rays to the ballast water to sterilize the ballast water;
• and
• a sleeve pipe enclosing the ultraviolet lamp to protect the ultraviolet lamp;
• a cap supporting each of opposite ends of the ultraviolet sterilization unit, one of the ends being an end of the sleeve, the cap comprising:
• a watertight shock-absorber located between an inner surface of the cap and an outer surface of the sleeve pipe, the watertight shock-absorber supporting the sleeve pipe in the cap and absorbing lateral vibrations of the sleeve pipe;
• a stop protrusion provided around the inner surface of the cap;
• and
• a shock absorption member located between an upper end of the sleeve pipe and a lower surface of the stop protrusion, the shock absorption member absorbing longitudinal vibrations of the sleeve pipe;
• a shock absorption unit having a first end elastically compressed by the cap, and a second end elastically compressing a corresponding end of the ultraviolet lamp, whereby the ultraviolet lamp is prevented from being damaged by a vibration, the shock absorption unit including
• a support body coupled to the ultraviolet lamp,
• an elastic member having an end that is the first end and another end that is the second end;
• and
• a shock absorption member interposed between an outer circumferential surface of the support body and the an inner circumferential surface of the sleeve pipe, the shock absorption member being elastically compressed therebetween.

An ultraviolet sterilizer having a vibration-proof function, comprising:

• an ultraviolet sterilization unit comprising:
• an inlet through which ballast water is drawn thereinto;
• an outlet through which the ballast water is discharged therefrom after the ballast water has been sterilized;
• and
• an ultraviolet lamp located between the inlet and the outlet, the ultraviolet lamp applying ultraviolet rays to the ballast water to sterilize the ballast water;
• a cap supporting each of opposite ends of the ultraviolet sterilization unit;
• a shock absorption unit having a first end elastically compressed by the cap, and a second end elastically compressing a corresponding end of the ultraviolet lamp, whereby the ultraviolet lamp is prevented from being damaged by a vibration;
• and
• a pressure controller connected to a predetermined portion of the cap, the pressure controller supplying air into the cap such that an internal pressure of the cap is maintained higher than an external pressure thereof.