| 摘要 |
The invention relates to a plasma spraying apparatus ( 1 ) including a plasma torch ( 2 ) for heating up a spray powder ( 3 ) in a heating zone ( 4 ) and a metering unit ( 5 ) for metering the spray powder ( 3 ), said metering unit ( 5 ) for conveying the spray powder ( 3 ) into an injection unit ( 6 ) by means of a conveyor gas ( 7 ) under a pre-determined pressure being connected with a conveyor gas unit ( 9 ) via a conveyor gas line ( 8 ). The injection unit ( 6 ) has an inlet ( 61 ) and an outlet ( 62 ) designed as a powder injector ( 62 ) so that the spray powder ( 3 ) can be supplied from the metering unit ( 5 ) to the injector unit ( 6 ) through the inlet ( 61 ) by means of the conveyor gas ( 7 ) via an injector line ( 10 ) to the injector unit ( 6 ). In this arrangement the injector unit ( 6 ) is designed and arranged in such a way that the spray powder ( 3 ) can be brought into the heating zone ( 4 ) by the conveyor gas ( 7 ) emerging from the powder injector ( 62 ), with a pressure sensor ( 11 ) for the detection of the pressure (P) of the conveyor gas ( 7 ) being provided for monitoring the condition of the plasma spraying apparatus ( 1 ). The invention further relates to a method for monitoring the condition of a plasma spraying apparatus ( 1 ).
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