| 摘要 |
FIELD: power industry. ^ SUBSTANCE: impact rapping device includes stationary anvil combined with rapping surface and having impact axis perpendicular to the above surface, striker having the possibility of being moved coaxially to impact axis for impact with impact surface of the anvil, and striker movement means; at that, anvil and striker form a compact assembly which can be assembled in any position; striker is supported for support on the anvil, and at least one sliding element is arranged between anvil and striker so that striker is only moved parallel to impact axis. Anvil and striker is arranged so that one of them can move at least partially inside the other one. ^ EFFECT: at such design the alignment of anvil and striker is not required during assembly of the device or repeated alignment at temperature increase of rapped heat exchange tubes. ^ 17 cl, 7 dwg |
