| 摘要 |
A radiation shield for valves comprises separable portions of shielding composition, such as lead or bismuth, which are provided in hollow cylindrical half-round portions. The shield portions are interfitingly juxtaposed, and preferably interlocked, when installed in their operating, shielding position. The shields may be removably affixed to an existing valve or pipe. The shield has a hard shell coating, preferably of ethylene methacrylic acid copolymer, to prevent the shielding composition, e.g. lead, from contaminating the structure on which it is used. At least one locking or fastening latch mechanism is provided for securing the separable portions one to the other. Most preferably, a hinge mechanism is provided at one side of each of the of separable portions (separable half-rounds, in the ideal case), and the hinge mechanism also preferably serves to secure the pair of separable portions to each other, thus allowing rapid installation. The separable shield portions can then be fastened or locked together on side of the half-rounds opposite the hinge, so that the half-rounds cooperate to form a finished shield with full coverage around the pipe or valve being shielded.
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