CN-115467186-B - Runnability component and device for a dryer section

Abstract

The present invention relates to a runnability component for a dryer section of a paper, board machine or the like and to an arrangement comprising the runnability component. The runnability component has an elongated box-shaped body with an inlet side surface comprising at least one sealing element and an outlet side surface arranged at a distance from the inlet side surface in the horizontal direction. The runnability component also includes a lower surface extending from the inlet side surface to the outlet side surface and ending at a first joint, and an upper surface extending from the inlet side surface to the outlet side surface and connecting to the outlet side surface at a second joint. The outlet side surface of the runnability component includes a protruding deflection shape with a main surface, which protruding deflection shape is arranged closer to the first joint than to the second joint.

Inventors

• PAAVO SAIRANEN
• H. Kenonin
• R. Conas

Assignees

• 维美德技术有限公司

Dates

Publication Date

20260505

Application Date

20220610

Priority Date

20210610

Claims (20)

1. 1. A runnability component for a dryer section of a paper or board machine, the runnability component having an elongated box-like body with: an inlet side surface comprising at least one sealing element, An outlet side surface arranged at a distance from the inlet side surface in a horizontal direction, wherein the outlet side surface has a main surface portion, -A lower surface extending from the inlet side surface to the outlet side surface and ending at a first junction, and An upper surface extending from the inlet side surface to the outlet side surface and being connected to the outlet side surface at a second joint, It is characterized in that the method comprises the steps of, The outlet side surface includes a protruding deflection shape having a main surface, the protruding deflection shape being disposed closer to the first engagement portion than the second engagement portion; the protruding deflection shape protrudes 30-70mm from a surface plane defined by the major surface portion; A distance between the inlet side surface and the outlet side surface increases between the second joint and a first inflection point at which the protruding skew shape starts protruding from the main surface portion; The outlet side surface is not provided with suction elements, blowing elements and/or sealing elements.
2. 2. The runnability component of claim 1, wherein the protruding deflection shape protrudes 45mm to 55mm from a surface plane defined by the primary surface portion.
3. 3. The runnability component of claim 1, wherein the major surface of the protruding skew shape includes at least one flat surface portion.
4. 4. A runnability component according to claim 3, characterized in that the flat surface portion of the protruding skew shape extends 100mm to 200mm seen in the direction from the first joint to the second joint.
5. 5. The runnability component of claim 4, wherein the flat surface portion of the protruding skew shape extends 120mm to 150mm.
6. 6. The runnability component of any of claims 3 to 5, wherein the main surface portion and the flat surface portion are arranged in parallel planes.
7. 7. The runnability component of any of claims 3 to 5, wherein the main surface portion and the flat surface portion are arranged at an angle with respect to each other.
8. 8. The runnability component of claim 7, wherein an angle between a surface plane defined by the primary surface portion and a plane defined by the planar surface portion is in a range of 145 ° to 175 °.
9. 9. The runnability component according to any one of claims 3 to 5, characterized in that the main surface of the protruding deflection shape is connected directly to the main surface portion at an inflection point or a flat surface portion of the main surface and the main surface portion are connected by a first intermediate surface.
10. 10. The runnability component according to any one of claims 1 to 5, characterized in that the length of the main surface portion from the inflection point to the second joint is 100mm to 350mm.
11. 11. The runnability component of claim 10, wherein a length of the main surface portion from the inflection point to the second junction is 200mm to 300mm.
12. 12. An arrangement for a dryer section of a paper or board machine, comprising: A first drying cylinder and a second drying cylinder arranged adjacent to each other at a first height, A turning roll arranged in the space between the first drying cylinder and the second drying cylinder at a second level, Wherein the turning roll and the first and second cylinders define pocket spaces formed between the first and second cylinders and the turning roll, The runnability component according to any of claims 1 to 11, being arranged in the pocket space, wherein the outlet side of the runnability component comprises a protruding skew shape with a main surface and is arranged facing the second drying cylinder, It is characterized in that the method comprises the steps of, The distance between the second drying cylinder and the main surface of the protruding skew shape is at most 40mm.
13. 13. The arrangement according to claim 12, characterized in that the arrangement comprises a drying wire extending from the first drying cylinder to the second drying cylinder via the turning roll, wherein a channel is formed between the drying wire and the main surface of the protruding deflection shape, seen in the direction of movement of the drying wire, the channel having a length in the range of 100mm to 200 mm.
14. 14. The apparatus of claim 13, wherein a distance in the channel between the drying wire and the major surface of the protruding skewed shape is in a range of 10mm to 40 mm.
15. 15. The apparatus according to claim 13 or 14, wherein the distance in the channel between the drying wire and the main surface of the protruding deflection shape is constant.
16. 16. The arrangement according to claim 13 or 14, characterized in that the channel between the main surface of the protruding skew shape and the second drying cylinder is arranged to widen in the direction of movement of the wire.
17. 17. The arrangement according to claim 13 or 14, characterized in that the protruding deflection shape is located below the tangent point where the drying wire meets the surface of the second drying cylinder.
18. 18. The arrangement according to claim 12, characterized in that the distance between the second drying cylinder and the main surface of the protruding skew shape is at most 30mm.
19. 19. The device of claim 13, wherein the channel has a length in the range of 120mm to 150 mm.
20. 20. The apparatus of claim 14, wherein a distance in the channel between the drying wire and the major surface of the protruding skewed shape is in a range of 20mm to 30 mm.

Description

Runnability component and device for a dryer section Technical Field The invention relates to a runnability component (runnability component) and a device (arrangement) for a dryer section of a paper, board or the like. Background The dryer section of a paper or board machine comprises heated cylinders, turning rolls and runnability components. The cylinders are typically arranged parallel to each other at a first level and the turning rolls are arranged parallel to each other at a second level. A pocket space is formed between each two adjacent cylinders and a turning roll located between the cylinders. The runnability components are arranged in these pocket spaces. The runnability component is typically a blow box or a suction box, or they can provide both blow and suction actions to stabilize the web. Typically, the runnability component is an elongated (elongated, oblong) box-like component, comprising a hollow interior space and channels for the necessary air transfer. Runnability components are used in the pocket space to create and maintain a negative pressure that helps to keep the web to be dried in contact with the wire and improves the overall runnability of the dryer section. The runnability component may include one or more blowing devices, suction devices, one or more sealing members and/or other structural features that help to remove air from the pocket space or to hinder air from entering the pocket space. Regardless of the existing runnability components, there is a need to find a simple and efficient way to create and/or maintain an improved negative pressure in the pocket space. A mechanically uncomplicated solution that is easy to construct and maintain is preferred. Disclosure of Invention It is an object of the present invention to minimize or even completely eliminate the drawbacks present in the prior art. It is an object to provide an operational component and device for generating and/or maintaining a high negative pressure in the pocket space of the dryer section. It is a further object of the invention to provide a runnability component that is not complicated to manufacture. These objects are achieved by the following aspects of the invention. The embodiments mentioned herein relate to all aspects of the invention, even if this is not always mentioned separately. The different embodiments can be freely combined with each other, if not explicitly stated otherwise. A typical runnability component of a dryer section for a paper, board or similar machine according to the invention has an elongated box-like body with: an inlet side surface comprising at least one sealing element, An outlet side surface arranged at a distance from the inlet side surface in the horizontal direction, -A lower surface extending from the inlet side surface to the outlet side surface and ending at a first junction, and An upper surface extending from the inlet side surface to the outlet side surface and being connected to the outlet side surface at a second joint, Wherein the outlet side surface comprises a protruding skew shape having a main surface, the protruding skew shape being arranged closer to the first engagement portion than the second engagement portion. A typical arrangement according to the invention for a dryer section of a paper machine, board machine or the like comprises: a first drying cylinder and a second drying cylinder arranged adjacent to each other at a first height, A turning roll arranged in the space between the first drying cylinder and the second drying cylinder at a second level, Wherein the turning roll and the first and second cylinders define pocket spaces formed between the first and second cylinders and the turning roll, A runnability component according to the invention arranged in a pocket space, where the outlet side of the runnability component comprises a protruding deflection shape with a main surface and is arranged facing the second cylinder, where the distance between the second cylinder and the main surface of the protruding deflection shape is at most 40mm, preferably at most 30mm. It has now been unexpectedly found that by arranging the protruding skew shape on the lower portion of the outlet side surface of the runnability component, air can be removed from the pocket space more efficiently. The protruding skew shape is simple in construction, provides unexpectedly effective functionality, and it can be adapted to many different dryer sections, even in existing paper and board machines. When the runnability component according to the invention is mounted in the pocket space, the main surface protruding the shape of the deflection is arranged close to the second cylinder. Thus, a narrow passage between the main surface of the protruding skew shape and the second cylinder is created. During the drying operation of the paper or board web, the web and the support wire are moved through a narrow channel, wherein the distance between the second drying cylinder and