Vacuum pressing roll structure for papermaking machine

Abstract

The invention relates to the technical field of papermaking machinery, specifically to a vacuum pressing roll structure for a papermaking machine. The vacuum pressing roll structure has reasonable design in an inner structure and can effectively guarantee good water suction effect in the process of pressing. The vacuum pressing roll structure comprises a roll body, wherein a vacuum box body capable of relatively rotating is arranged inside the roll body; the vacuum box body is of a drum shape with two opened ends and is defined by a semi-arc box body and a semi-hexangular box body; the two opened ends of the vacuum box body are respectively fixedly connected with a transmission-side vacuum box head and an operation-side vacuum box head; the top end of the semi-arc part of the semi-arc box body is provided with a central opened groove, and two sides of the semi-arc part of the semi-arc box body are respectively provided with a lateral opened groove; two sides of the lateral opened groove are respectively and axially provided with a sealing device; the central opened groove and the end parts of the lateral opened groove are respectively and radially provided with a sealing device; and the interior of the vacuum box body is provided with a box-body V-shaped partition plate which is connected with the two opened ends of the central opened groove and divides the vacuum box body into a small box-body fan-shaped compartment and a large box-body V-shaped opened compartment.

Description

technical field [0001] The invention relates to the technical field of papermaking machinery, in particular to a vacuum press roll structure of a papermaking machine. Background technique [0002] The paper machine is a combined equipment for papermaking, mainly composed of flow conveying, forming, pressing and drying stations. In the forming station, the paper pulp is dewatered during the flattening and forming, and then enters the pressing operation. The final wet paper page is further dehydrated by pressurization. Generally, press rolls are used for pressing, and at the same time, the internal vacuum box is used for water absorption operation, so as to achieve the effect of water removal. However, the structure of the general press roll and the structure of the vacuum box are not designed well. Reasonable, can not achieve a good water absorption effect. Contents of the invention [0003] In order to solve the above problems, the present invention provides a structure o...

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Problems solved by technology

[0002] The paper machine is a combined equipment for papermaking, mainly composed of flow conveying, forming, pressing and drying stations. In the forming station, the paper pulp is dewatered during the flattening and forming, and then enters the pressing operation. The final wet paper page is further dehydrated by pressurization. Generally, press rolls are used for pressing, and at the same time, the internal vacuum box is used for water absorption operation, so as to achieve the effect of water removal. However, the structure of the general press roll and the structure of the vacuum box are not designed well. Reasonable, unable to achieve good water absorption effect

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