| 摘要 |
A device for protecting a spraying equipment ( 8 ) and its surroundings in a paper or board machine, for applying a treatment medium onto a moving surface ( 3 ), comprises a protecting cover ( 11 ) having a space ( 12 ), which forms a single chamber in which the spraying equipment is located and which is open towards the moving surface in connection with an application zone, and two wall elements ( 13, 14 ) which extend cross to the machine direction on either side of the application zone, and define machine-wide gaps ( 24; 40 and 25; 26; 41 , respectively) between themselves and the moving surface. According to the invention, the protecting cover has a sealing arrangement arranged in connection with said gaps for restricting passage of air and contaminations through the gaps in a controlled manner; a system for a controlled supply of capture air for capturing contaminations occurring within the space; and an evacuating system for a controlled, continuous evacuation of the capture air with contaminations from the chamber. The invention also relates to a method of protecting such a spraying equipment and its surroundings while using such a device.
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