| 摘要 |
The sandblast cleaning pistol is provided with a pipe sleeve allowing for the recovery of the sandblasting agent. The pistol body has an approximately conical shape; the air-blast nozzle is placed on the cone peak coaxial with the cone; the sandblast pipe sleeve axis touches the conical body axis in front of the air-blast nozzle; the sandblast nozzle has an approximately the external shape of a truncated cone and a convergent-divergent internal shape, while its axis coincides with the conical body axis. The sand recovery pipe sleeve is placed under the sandblast nozzle, also touching the conical body axis; thus, between the external surface of the sandblast nozzle and the inner surface of the conical body, a space is created allowing for the recovery of the sandblasting agent.
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