Method of and device for pocket ventilation in the drying section of a paper machine, in particular for high-speed paper
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F26B-005/00
출원번호
US-0295607
(1988-12-27)
국제출원번호
PCT/FI87/00065
§371/§102 date
19881227
(19881227)
국제공개번호
WO-8808898
(1988-11-17)
발명자
/ 주소
Eskelinen Pekka (Turku FIX) Raatikainen Pentti (Turku FIX) Karlsson Markku (Parainen FIX) Virta Raimo (Turku FIX)
출원인 / 주소
Valmet Paper Machinery Inc. (FIX 03)
인용정보
피인용 횟수 :
24인용 특허 :
2
초록▼
Method and device in multi-cylinder dryers of a paper machine, which the dryers comprise two lines of drying cylinders (10,11), in whose connection twin-wire draw is applied, by means of whose drying wire (F1,F2) a closed draw is obtained in the transfer of the paper web (W) from one cylinder line o
Method and device in multi-cylinder dryers of a paper machine, which the dryers comprise two lines of drying cylinders (10,11), in whose connection twin-wire draw is applied, by means of whose drying wire (F1,F2) a closed draw is obtained in the transfer of the paper web (W) from one cylinder line onto the other. In the closed draw, the guide rolls (12/13) of the drying wires (F1/F2) are placed at the proximity of the run of the other wire (F2/F1) on which the drying wire runs from its drying cylinder (11/10) to its guide roll (13/12). For the purpose of ventilation of the pockets (T1,T2) defined by the drying wires (F1,F2) and by the free faces of the drying cylinders (10,11), an air jet or air jets (S1) are blown against the drying wires (F1,F2) within the area in which the drying wire (F1/F2) contacts a portion of the web (W) supported by the other drying wire F2 /F1 which runs over a segment of the circumference of the guide roll (13/12) of the other drying wire F2/F1. From the air jets, drying air is passed through a widening wedge space (N) defined by the said drying wire (F1/F2) and by the portion of the web (W) and the other drying wire F2/F1 which runs over a segment of the circumference of the guide roll (13/12) of the other drying wire F2/F1 into the said pocket (T2/T1) so as to ventilate the pocket. The air jet (S1) or jets are preferably directed perpendicularly to the face of the drying wire (F1/F2) that is opposite relative the web (W) at a location facing the guide roll (13/12) of the other drying wire (F2/F1).
대표청구항▼
Method of operating multi-cylinder dryers of a paper machine, where said dryers comprise two lines of drying cylinders (10, 11), in whose connection a twin-wire draw is applied so that, by means of a first and second drying wire (F1, F2), a closed draw is obtained in the transfer of a paper web (W)
Method of operating multi-cylinder dryers of a paper machine, where said dryers comprise two lines of drying cylinders (10, 11), in whose connection a twin-wire draw is applied so that, by means of a first and second drying wire (F1, F2), a closed draw is obtained in the transfer of a paper web (W) from one cylinder line onto another, and in which method, a closed draw is provided, guide rolls (12/13) of the respective first and second drying wires (F1/F2) are placed at the proximity of the run of the other wire (F2/F1) on which the drying wire runs from its drying cylinder (11/10) to its guide roll (13/12) whereat air is blown through said drying wires (F1/F2) so as to ventilate pockets (T1/T2) defined by said wires and free faces of the drying cylinders (10/11), characterized in that an air jet or air jets (S1) are used as ventilation blows, said jets being directed at the run of the first and second drying wires (F1/F2) at which the respective drying wire (F1/F2) runs from its drying cylinder (11/10) onto its guide roll (13/12), that said air jets are applied within said run of the drying wire (F1/F2) in the area in which the respective drying wire (F1/F2) contacts a portion of the web (W) supported by the other respective drying wire (F2/F1) which runs over a segment of the circumference of the guide roll of the other respective drying wire (F2/F1) and in which blow area there is a widening wedge space (N) defined by the respective drying wire (F1/F2) and its guide roll (13/12), through which wedge space the pocket ventilation blowing takes place.
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이 특허에 인용된 특허 (2)
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