Sealing device of vacuum adsorption roller and vacuum adsorption roller

Abstract

According to the sealing device of the vacuum adsorption roller and the vacuum adsorption roller, by improving the sealing device of the vacuum adsorption roller, vacuum fluctuation of the vacuum adsorption roller can be effectively reduced, and the papermaking capacity is effectively improved. The sealing device of the vacuum adsorption roller comprises a seat part, a limiting assembly and a sealing unit, the sealing unit can move along a first direction relative to the seat part; the sealing unit comprises a sealing end face. The limiting assembly comprises a limiting part and an adapting part, the adapting part is arranged on the sealing unit, and the limiting part is directly or indirectly connected with the seat part; in the first direction, part of the limiting part is located between the adapting part and the sealing end face so that the sealing unit can be stopped at the set position.

Description

Technical Field

[0001] This application relates to the field of papermaking equipment technology, and more specifically, to a sealing device for a vacuum adsorption roller and the vacuum adsorption roller itself. Background Technology

[0002] In the papermaking process, vacuum adsorption rollers play a crucial role. Their core function is to transport the paper web using the traction force generated by the high / low vacuum chambers and speed difference. The vacuum stability of the vacuum adsorption rollers is a significant factor affecting papermaking capacity. Summary of the Invention

[0003] The purpose of this invention is to provide a sealing device for a vacuum adsorption roller and a vacuum adsorption roller. By improving the sealing device of the vacuum adsorption roller, the vacuum fluctuation of the vacuum adsorption roller can be effectively reduced, thereby effectively improving the paper production capacity.

[0004] To achieve the above objectives, the present invention provides a sealing device for a vacuum adsorption roller, comprising a seat, a limiting component, and a sealing unit; the sealing unit is movable relative to the seat in a first direction; the sealing unit includes a sealing end face; the limiting component includes a limiting part and an adapter part, the adapter part being disposed on the sealing unit, and the limiting part being directly or indirectly connected to the seat; in the first direction, a portion of the limiting part is located between the adapter part and the sealing end face to stop the sealing unit at a set position.

[0005] By placing the limiting part between the adapter part and the sealing end face, the limiting part can stop the sealing unit at a set position, thereby reducing or preventing the sealing unit from falling in the first direction and rubbing against the roller shell. This reduces or prevents the wear of the sealing unit from causing vacuum fluctuations, thereby improving the paper production capacity.

[0006] Optionally, the sealing unit is partially recessed to form a platform, which serves as an adapter; or, the adapter includes a stop arm connected to the sealing unit.

[0007] Optionally, the sealing unit has a retracted position and an extended position, the extended position being closer to the roller shell than the retracted position; in the extended position, the limiting portion and the adapter portion abut against each other along a first direction; or, along the first direction, there is a set gap between the limiting portion and the adapter portion.

[0008] Optionally, it also includes an adapter, with the limiting part detachably connected to the adapter; the adapter is fixed to the base.

[0009] Optionally, the adapter is a screw fixedly connected to the base; the screw is also fitted with a nut;

[0010] The limiting part is sleeved on the screw, and the nut is used to press the limiting part against the side wall of the seat.

[0011] Optionally, the sealing unit is provided with a limiting component on at least one side in the second direction; and / or; the sealing unit is provided with a limiting component on at least one side in the third direction.

[0012] Optionally, along a third direction, the limiting component located on one side of the sealing unit is distributed opposite to the limiting component located on the other side of the sealing unit; or, the limiting component located on one side of the sealing unit is staggered from the limiting component located on the other side of the sealing unit.

[0013] Optionally, at least one limiting component is provided on one side of the sealing unit;

[0014] Multiple limiting components located on the same side are distributed at intervals.

[0015] Optionally, the limiting part includes a first arm and a second arm, which are arranged at an angle.

[0016] The first arm is directly or indirectly fixed to the side wall of the seat; the second arm and the adapter are opposite each other along the first direction.

[0017] A vacuum adsorption roller is also provided, including a roller shell and a sealing device located inside the roller shell, the roller shell being rotatable relative to the sealing device. This can reduce or avoid vacuum fluctuations in the vacuum adsorption roller, thereby increasing paper production capacity.

[0018] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0020] Figure 1 This is an axial view, first perspective, of the sealing device of the vacuum adsorption roller in this application;

[0021] Figure 2 This is a top view of the sealing device of the vacuum adsorption roller in this application;

[0022] Figure 3 This is an axial view, second perspective, of the sealing device of the vacuum adsorption roller in this application;

[0023] Figure 4 yes Figure 1 An explosion diagram;

[0024] Figure 5 yes Figure 2 A cross-sectional view along the DD direction shows the ejection position;

[0025] Figure 6 yes Figure 2 The cross-sectional view along the DD direction shows the retraction position;

[0026] Figure 7 This is an isometric view of the limiting portion in one embodiment;

[0027] Figure 8 yes Figure 7 Side view;

[0028] Figure 9 yes Figure 7 Top view;

[0029] Figure 10 This is an axonometric view of the limiting portion in another embodiment;

[0030] Figure 11 yes Figure 10 Side view;

[0031] Figure 12 yes Figure 10 Top view;

[0032] Figure 13 This is a cross-sectional view of the vacuum adsorption roller, showing part of its structure. Detailed Implementation

[0033] To achieve the above objectives, the present invention provides a sealing device for a vacuum adsorption roller. For example... Figures 1 to 13 As shown, Figure 1 This is an axial view, first perspective, of the sealing device of the vacuum adsorption roller in this application; Figure 2 This is a top view of the sealing device of the vacuum adsorption roller in this application; Figure 3 This is an axial view, second perspective, of the sealing device of the vacuum adsorption roller in this application; Figure 4 yes Figure 1 An explosion diagram; Figure 5 yes Figure 2 A cross-sectional view along the DD direction shows the ejection position; Figure 6 yes Figure 2 The cross-sectional view along the DD direction shows the retraction position; Figure 7 This is an isometric view of the limiting portion in one embodiment; Figure 8 yes Figure 7 Side view; Figure 9 yes Figure 7 Top view; Figure 10 This is an axonometric view of the limiting portion in another embodiment; Figure 11 yes Figure 10 Side view; Figure 12 yes Figure 10 Top view; Figure 13This is a cross-sectional view of a vacuum adsorption roller, showing part of its structure. The first direction is the y-axis, the second direction is the x-axis, and the third direction is the z-axis.

[0034] The sealing device of the vacuum adsorption roller includes a seat 1, a limiting component 2, and a sealing unit 3. The sealing unit 3 is movable relative to the seat in a first direction. The sealing unit 3 includes a sealing end face 3a. The limiting component 2 includes a limiting part 21 and an adapter part 22. The adapter part 22 is disposed on the sealing unit 3, and the limiting part 21 is directly or indirectly connected to the seat 1. In the first direction y, a portion of the limiting part 21 is located between the adapter part 22 and the sealing end face 3a to stop the sealing unit 3 at a set position.

[0035] By placing the limiting part 21 between the adapter part 22 and the sealing end face 3a, the limiting part 21 can stop the sealing unit 3 at a set position, thereby reducing or preventing the sealing unit 3 from falling in the first direction and rubbing against the roller shell 10. This reduces or prevents the wear of the sealing unit 3 from causing vacuum fluctuations, thereby improving the paper production capacity.

[0036] Specifically, please see Figures 5 to 6 The seat 1 serves as a support unit to support the sealing unit 3. For example, the seat 1 is a groove-shaped structure with one end open, and part of the sealing unit 3 is located inside the seat 1, while part of it extends out of the opening of the seat 1 to the outside of the seat 1.

[0037] The sealing unit 3 specifically includes a bracket 31 and a sealing strip 32 fixedly connected to the bracket 31. The bracket 31 and the sealing strip 32 can be connected as a single unit by welding, hinge, or tenon joint. The sealing unit 3 can move up and down relative to the seat 1 along the first direction y to an ejected position and a retracted position. The ejected position is closer to the roller shell 10 than the retracted position. Figure 5 In the example shown, sealing unit 3 is in the ejected position. Figure 6 In the example shown, sealing unit 3 is in the retracted position.

[0038] The sealing unit 3 has a sealing end face 3a that fits with the roller shell 10 with a clearance, so that the roller shell 10 can rotate relative to the sealing unit 3. Figure 5 and Figure 6 In the example shown, the sealing end face 3a is an arc surface to fit the roller shell 10. The sealing end face 3a can also be a straight surface, which can be chosen by those skilled in the art.

[0039] The seat 1 is also equipped with a driving component (not shown in the figure) to drive the sealing unit 3 to move in the first direction. The driving component can be a balloon, which is fixedly connected to the sealing unit 3 and the seat 1, and drives the sealing unit 3 to move by expanding and contracting the balloon.

[0040] Optionally, a locking element 6 is also provided between the sealing unit 3 and the inner wall of the seat 1. The locking element 6 can also be a balloon, which can squeeze the sealing unit 3 into the seat 1 by expanding the balloon.

[0041] In traditional technical solutions, the sealing unit 3 is arranged in different ways to adapt to the paper web conveying requirements at different positions in the papermaking industry. Under different arrangements, the first direction will be distributed at different angles to the horizontal plane. In some cases, for example, when the first direction is perpendicular to the horizontal plane and the sealing unit 3 is located below the housing 1, the sealing unit 3 may fall along the first direction away from the seat 1 and come into contact with the roller shell 10. Thus, when the roller shell 10 rotates relative to the sealing unit 3, the roller shell 10 will rub against the sealing unit 3. Over time, this will lead to severe wear of the sealing unit 3, or even seal failure, further causing seal fluctuations, resulting in paper breaks and severely impacting papermaking capacity.

[0042] In the technical solution of this application, a limiting component 2 is provided to form a stop on the sealing unit 3 in the first direction, thereby reducing or avoiding contact and friction between the sealing unit 3 and the roller shell 10.

[0043] The limiting component 2 includes an adapter 22 disposed on the sealing unit 3 and a limiting part 21 directly or indirectly fixed to the seat 1, with a portion of the limiting part 21 located between the adapter 22 and the sealing end face 3a.

[0044] By adopting this structure, when the sealing unit 3 is disengaged from the seat 1, the limiting part 21 can form a limiting stop with the fitting part 22, thereby limiting the extreme position of the sealing unit 3 disengaging from the seat 1. At this extreme position, the sealing unit 3 can form a clearance fit with the roller shell 10, thereby reducing or avoiding wear between the sealing unit 3 and the roller shell 10.

[0045] In one specific embodiment, the sealing unit 3 has two ends disposed along a first direction, and the sealing end face 3a is the end face of the sealing unit 3 away from the seat portion 1. A portion of the side portion of the sealing unit 3 is recessed to form a notch, and a platform is formed within the notch, which serves as the adapter portion 22.

[0046] The limiting portion 21 is partially located within the notch and does not extend beyond the sealing end face 3a, thereby preventing friction between the limiting portion 21 and the roller shell 10. The portion of the limiting portion 21 located within the notch is opposite to the platform surface in a first direction. In the ejected position, the limiting portion 21 may abut against the platform surface or may have a gap between it and the platform surface. Those skilled in the art can choose for themselves.

[0047] By processing the sealing unit 3 and forming a notch on the side of the sealing unit 3, the platform inside the notch can be made to face the limiting part 21 in the first direction. This allows the sealing unit 3 to be designed to exit the seat part 1 at the extreme position, thereby reducing or avoiding excessive wear of the sealing unit 3.

[0048] In another embodiment, the adapter 22 includes a stop arm (not shown) connected to the sealing unit 3. This stop arm can be fixed to the side of the sealing unit 3 by welding, gluing, or riveting, and is located outside the sealing unit 3. To avoid interference with the movement of the sealing unit 3 in the first direction, the stop arm is always located outside the seat 1. A portion of the limiting portion 21 faces the stop arm along the first direction. In the pushed-out position, the limiting portion 21 can either abut against the stop arm along the first direction or form a certain gap with the stop arm in the first direction.

[0049] By fixing the stop arm to the side of the sealing unit 3, the stop arm and the limiting part 21 can be made to face each other in the first direction. This allows the sealing unit 3 to be designed to exit the seat part 1 at the extreme position, thereby reducing or avoiding excessive wear of the sealing unit 3.

[0050] In some more specific implementations, such as Figure 1 and Figure 4 As shown, the sealing unit 3 is provided with a limiting component 2 on at least one side of the second direction x. That is, the sealing unit 3 may have the aforementioned limiting component 3 on one side of the second direction x, or it may have limiting components 3 on both sides of the second direction x. And / or the sealing unit 3 is provided with a limiting component 2 on at least one side of the third direction z. That is, the sealing unit 3 may have a limiting component 2 on one side of the third direction z, or it may have a limiting component 2 on both sides of the third direction z.

[0051] By setting limiting components on one side of the second direction x or the third direction z, the sealing unit can be constrained from a single direction, preventing displacement on one side. If limiting components are set on both sides of the second direction x or the third direction z, the sealing unit can be constrained in all directions in both directions. This method can adapt to different layout requirements of the sealing device.

[0052] In one implementation, such as Figure 2 As shown, along the third direction x, the limiting component 2 located on one side of the sealing unit 3 and the limiting component 2 located on the other side of the sealing unit 3 are distributed opposite each other. Specifically, the sealing unit 3 has a centerline s1 extending along the second direction x, and the centerline s1 passes through the midpoint of the sealing unit 3 along the third direction z. The sealing unit 3 in Figure 2 A limit component 2 is provided on the upper side and a limit component 2 is also provided on the lower side.

[0053] For example, the adapter 22 is a notch formed in the sealing unit 3, which extends in the third direction z toward the side near the center line s1. In its extension direction, the notch may be aligned with the center line s1, or it may be located above or below the center line s1.

[0054] The adapter 21 is a limiting rod, part of which is located within the notch and is opposite to the table surface along a first direction, wherein the first direction is Figure 2 The direction perpendicular to the paper.

[0055] The notches located on both sides of the sealing unit 3 can be aligned relative to each other along a third direction. The relatively distributed limiting components 2 can simultaneously apply restraining forces from both sides of the sealing unit 3 at the same location.

[0056] Of course, it can also be, such as Figure 2 As shown, the limiting component 2 located on one side of the sealing unit 3 is staggered with the limiting component 2 located on the other side of the sealing unit 3. That is, the limiting components 2 on both sides are distributed at intervals along the x-direction extending from the centerline s1. This arrangement not only serves to limit and stop the sealing unit 3, but also forms more limiting points in the x-direction, thereby improving the limiting efficiency of the limiting component 2.

[0057] In the various embodiments described above, at least one limiting component 2 is provided on one side of the sealing unit 3. That is, the sealing unit 3 may have one or more limiting components 2 on one side in the second direction x, and one or more limiting components 2 on one side in the third direction z. The multiple limiting components 2 located on the same side are distributed at intervals. This can further enhance the stability of the limiting and also improve the uniformity of the gap between the sealing end face 3a and the roller shell 10.

[0058] The following is combined with Figure 2 as well as Figures 5 to 7 The structure of the adapter 21 will be described in detail. In the aforementioned embodiments, the limiting part 21 includes a first arm 211 and a second arm 212, which are arranged at an angle. The first arm 212 is directly or indirectly fixed to the side wall of the base 1; the second arm 212 is opposite to the adapter 22 along a first direction. In this way, one end of the limiting part 21 can be fixed to the base 1, and the other end can be adapted to the adapter 21. This structure is relatively simple and has reliable structural strength.

[0059] Specifically, the first arm 211 is perpendicular to the second arm 212. The end of the first arm 211 that connects to the second arm 212 is bent to avoid stress concentration and improve the structural strength of the limiting part 21.

[0060] Figures 7 to 9 The limiting part 21 shown is used to be provided on both sides of the sealing unit 3 distributed along the z direction. Figures 10 to 12 The limiting part 21 shown is used to be provided at both ends of the sealing unit distributed along the x-direction.

[0061] exist Figures 9 to 12 In this configuration, the width of the first arm 211 is greater than the width of the second arm 212, meaning that in the width direction of the limiting component 2, both sidewalls 211a of the first arm 211 are located outside the two sidewalls 212a of the second arm 212. Furthermore, a chamfered edge is provided at the point where the sidewalls 211a of the first arm 211 and the sidewalls 212a of the second arm 212 meet.

[0062] Along the length of the limiting assembly 2, the first arm 211 has an end wall 211b, and the second arm 212 is disposed at the middle of the end wall 211b. The end wall 211b is spaced apart from the side wall of the sealing strip 32, thereby preventing wear on the sealing strip 32. The second arm 212 also has an end wall 212b along the length of the limiting assembly 2. The end wall 212b is located on the side of the second arm 212 away from the first arm 211. The end wall 212b is located within the notch and is spaced apart from the side wall of the notch, thereby preventing wear on the sealing strip 32.

[0063] In some other specific implementation paradigms, the sealing device of the vacuum adsorption roller also includes an adapter 4, and the limiting part 21 is detachably connected to the adapter 4; the adapter 4 is fixed to the seat part 1. By setting the adapter 4, the detachable connection between the limiting part 21 and the seat part 1 is realized, thereby facilitating the installation and removal of the sealing unit 3.

[0064] exist Figure 5 as well as Figure 6 In the example shown, the adapter 4 is a screw 41 fixedly connected to the base 1. The screw 41 is welded to the base 1 by welding, gluing, or other methods. The outer wall of the screw 41 has a threaded structure. The screw 41 is also fitted with a nut 42. The limiting part 21 has a through hole for the screw 41 to pass through, and the limiting part 21 is sleeved on the screw 41. The nut 42 is used to press the limiting part 21 against the side wall of the base 1.

[0065] Specifically, the first arm 211 has a through hole that extends through the first arm 211 along the thickness direction. After the first arm 211 is fitted onto the screw 41, the nut 42 is installed to press the first arm 211 against the seat 1, thereby completing the installation of the limiting component 2.

[0066] In one specific embodiment, the notch has a dimension of 1 mm in the first direction. When the sealing unit 3 is in the retracted position, there is a first gap between the second arm 212 and the platform, and a second gap between the second arm 212 and the surface where the sealing end face 3a is located. The first gap can be between 1 mm and 5 mm, and the second gap can be between 4 mm and 10 mm.

[0067] Within this size range, it can be ensured that when the sealing unit 3 is in the ejected position, the second arm 212 abuts against the sealing unit 3 or forms a gap between the second arm 212 and the sealing unit 3, thereby avoiding interference with the sealing unit 3 when the sealing unit 3 moves from the retracted position to the ejected position. At the same time, it can also be ensured that the second arm 212 is always located inside the sealing unit 3, thereby avoiding friction between the second arm 212 and the roller 10.

[0068] For example, in such Figure 5 and Figure 6 In the example shown, the notch does not penetrate the limiting end face 3a. In the retracted position, the distance between the end face of the limiting part 211 and the top wall of the notch is 4 mm, and the first gap is 1.5 mm. Of course, the notch can also penetrate the limiting end face 3a, which can be chosen by those skilled in the art. In the extended position, the distance between the end face of the limiting part 211 and the top wall of the notch is 1.5 mm, and the first gap is 4 mm.

[0069] In another aspect of this application, a vacuum adsorption roller is provided, such as Figure 13 As shown, a vacuum adsorption roller is used to transport paper web 40. The vacuum adsorption roller includes a roller shell 10 and a sealing device. The sealing device includes a sealing unit 3, which is located inside the roller shell 10 and is rotatable relative to the sealing device. Specifically, a roller core 20 is provided inside the roller shell 10, and the roller core 20 is provided with two sealing devices to form a sealed cavity 30. Alternatively, the roller core 20 may be provided with three sealing devices, which are spaced apart to form two sealed cavities 30. At least one sealing device is provided with the aforementioned limiting component 2, which can be selected by those skilled in the art as needed. This can reduce or avoid vacuum fluctuations in the vacuum adsorption roller and improve paper production capacity.

[0070] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above description of the implementation methods is only for the purpose of helping to understand the core ideas of the present invention. It should be noted that relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0071] The foregoing embodiments are merely illustrative. Those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the scope of the claims. Furthermore, those skilled in the art can combine the various embodiments in part or in whole, and all technical solutions derived from such combinations fall within the scope of this patent.

Claims

1. A sealing device for a vacuum adsorption roller, characterized in that, It includes a seat (1), a limiting component (2), and a sealing unit (3); the sealing unit (3) is movable relative to the seat (1) in a first direction; The sealing unit (3) includes a sealing end face (3a); The limiting component (2) includes a limiting part (21) and an adapter part (22). The adapter part (22) is disposed on the sealing unit (3). The limiting part (21) is directly or indirectly connected to the seat part (1). In the first direction, a portion of the limiting part (21) is located between the adapter part (22) and the sealing end face (3a) to stop the sealing unit (3) at a set position.

2. The sealing device for the vacuum adsorption roller according to claim 1, characterized in that, The sealing unit (3) is partially recessed to form a platform, which serves as the adapter (22); or, The adapter (22) includes a stop arm connected to the sealing unit (3).

3. The sealing device for the vacuum adsorption roller according to claim 1, characterized in that, The sealing unit (3) has a retraction position and an ejection position, the ejection position being closer to the roller shell (10) of the vacuum adsorption roller than the retraction position; At the ejection position, the limiting part (21) and the adapter part (22) abut against each other along the first direction; or, along the first direction, there is a set gap between the limiting part (21) and the adapter part (22).

4. The sealing device for the vacuum adsorption roller according to claim 1, characterized in that, It also includes an adapter (4), the limiting part (21) is detachably connected to the adapter (4); the adapter (4) is fixed to the seat part (1).

5. The sealing device for the vacuum adsorption roller according to claim 4, characterized in that, The adapter (4) is a screw (41) fixedly connected to the seat (1); the screw (41) is also fitted with a nut (42); the limiting part (21) is sleeved on the screw (41), and the nut (42) is used to press the limiting part (21) against the side wall of the seat (1).

6. The sealing device for the vacuum adsorption roller according to any one of claims 1-5, characterized in that, The sealing unit (3) is provided with the limiting component (2) on at least one side in the second direction; and / or; the sealing unit (3) is provided with the limiting component (2) on at least one side in the third direction.

7. The sealing device for the vacuum adsorption roller according to claim 6, characterized in that, Along the third direction, the limiting component (2) located on one side (3) of the sealing unit is distributed opposite to the limiting component (2) located on the other side of the sealing unit (3); or, the limiting component (2) located on one side of the sealing unit (3) is staggered from the limiting component (2) located on the other side of the sealing unit (3).

8. The sealing device for the vacuum adsorption roller according to claim 6, characterized in that, At least one of the limiting components (2) is provided on one side of the sealing unit (3); a plurality of the limiting components (2) located on the same side are spaced apart.

9. The sealing device for the vacuum adsorption roller according to any one of claims 1-8, characterized in that, The limiting part (21) includes a first arm (211) and a second arm (212), which are arranged at an angle; The first arm (212) is directly or indirectly fixed to the side wall of the seat (1); the second arm (212) and the adapter (22) are opposite each other along the first direction.

10. A vacuum adsorption roller, characterized in that, Includes a roller shell (10) and a sealing device according to any one of claims 1-9, the sealing device being located within the roller shell (10), the roller shell (10) being rotatable relative to the sealing device.

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